A needle-holding device for injection with positioning and feedback functions

Abstract

The application belongs to the technical field of injection needle holding, and particularly relates to an injection needle holding device with positioning and feedback functions, which comprises a positioning seat, the side wall of the positioning seat is symmetrically and fixedly connected with a restraint air bag, the top wall of the positioning seat is fixedly connected with an injection cylinder, the top end of the injection cylinder is threadedly connected with a sealing cover, the top wall of the sealing cover is fixedly connected with an electromagnetic reversing valve, an air inlet pipe and an air inlet tank, and the air inlet tank is provided in a hollow mode; the restraint air bag is used for flexibly fixing a limb, the injection depth of a syringe is detected through an airflow driving and pressure feedback mechanism, the depth is prevented from being too shallow or too deep due to differences in operation experience, the pushing pressure and speed can be self-adaptively adjusted according to the viscosity of a liquid medicine, the completion of pushing of the liquid medicine or the blockage of a needle head can be detected, the injection can be timely stopped, the depth is confirmed to meet the standard first, then the pushing is started, the pushing is stopped in real time when an abnormality occurs, and the superimposed risks of depth misjudgment and pushing out of control in traditional injection are eliminated.

Description

Technical Field

[0001] This invention belongs to the field of injection needle holding technology, specifically referring to an injection needle holding device with positioning and feedback functions. Background Technology

[0002] In the clinical medical field, intramuscular injection is an important method of drug administration, and it is widely used in outpatient treatment, emergency care, chronic disease management and other scenarios.

[0003] When injecting medication, the depth of puncture depends on the experience of medical staff, which has the problems of large individual differences and high error risk. It is difficult to ensure that the medication is accurately injected into the muscle layer, which may affect the treatment effect or cause tissue damage. It is also impossible to dynamically adjust the injection pressure and speed according to the viscosity of the medication. Sudden pressure increases may cause needle blockage and medication backflow. Abnormal conditions such as needle blockage and medication depletion may be detected late, which may easily lead to safety risks such as tissue damage and air embolism. Summary of the Invention

[0004] To address the above issues and overcome the shortcomings of existing technologies, this invention provides an injection needle holder with positioning and feedback functions. This application utilizes an inflatable restraint balloon to achieve flexible fixation of the limb. Through airflow drive and pressure feedback mechanisms, it enables syringe puncture depth detection, eliminating the need to judge the puncture depth and avoiding depth errors due to differences in operational experience. This solves the technical problem of ensuring accurate drug injection into the muscle layer in existing technologies. It can adaptively adjust the pushing pressure and speed according to the drug viscosity, solving the technical problems of needle blockage and drug backflow caused by sudden pressure increases in existing technologies. It can also detect the completion of drug delivery or needle blockage, facilitating timely cessation of injection. This solves the technical problems of potential safety risks such as tissue damage and air embolism in existing technologies.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: The present invention proposes an injection needle holding device with positioning and feedback functions, including a positioning seat, a restraining airbag symmetrically fixedly connected to the side wall of the positioning seat, an injection cylinder fixedly connected to the top wall of the positioning seat, a sealing cap threadedly connected to the top of the injection cylinder, an electromagnetic reversing valve, an air inlet pipe and an air inlet box fixedly connected to the top wall of the sealing cap, the air inlet box being hollow, a moving plate longitudinally slidingly connected to the inner circumferential wall of the injection cylinder, an inner cavity being provided between the top wall of the moving plate, the inner circumferential wall of the injection cylinder and the inner top wall of the sealing cap, and the bottom end of the air inlet pipe communicating with the inner cavity.

[0006] Preferably, one end of the electromagnetic reversing valve is connected to an external air source through an air pipe, a pressure valve is fixedly connected to one side wall of the electromagnetic reversing valve, the pressure valve is connected to the side wall of the restraint airbag through an air pipe, the pressure valve is electrically connected to the electromagnetic reversing valve, and the output end of the electromagnetic reversing valve is connected to the top of the air intake pipe and the top wall of the air intake box through an air pipe.

[0007] Preferably, a limiting cylinder is coaxially fixedly connected to the top wall of the movable plate, and a syringe is provided inside the limiting cylinder. The spike end of the syringe extends out of the bottom end of the syringe and the positioning seat, and a compression spring is fixedly connected between the bottom wall of the movable plate and the bottom wall of the syringe.

[0008] Preferably, a support rod is fixedly connected between the bottom wall and the top wall of the air intake pipe, and a movable ring is slidably connected longitudinally on the support rod. The outer circumferential wall of the movable ring is slidably connected longitudinally to the inner circumferential wall of the air intake pipe. The lower end of the air intake pipe is symmetrically provided with air outlets, and the air intake pipe communicates with the inner cavity through the air outlets. A guide spring is sleeved on the support rod, and the two ends of the guide spring are fixedly connected to the bottom wall of the movable ring and the bottom wall of the air intake pipe, respectively. A contact switch is fixedly connected to the inner circumferential wall of the air intake pipe.

[0009] Preferably, a pneumatic telescopic rod is symmetrically fixedly connected to the inner top wall of the sealing cover. The base end of the pneumatic telescopic rod is connected to the hollow part of the air inlet box through an air pipe. A push plate is fixedly connected to the telescopic end of the pneumatic telescopic rod, and the bottom wall of the push plate is close to the injection end of the syringe.

[0010] Preferably, a connecting pipe is fixedly connected to the top wall of the air intake box, and the top wall of the connecting pipe is connected to the output end of the electromagnetic reversing valve through an air pipe. A guide rod is fixedly connected to the top end of the connecting pipe and the inner bottom wall of the air intake box. A driving ring is slidably connected to the guide rod longitudinally. The outer circumferential wall of the driving ring is slidably connected to the inner circumferential wall of the connecting pipe longitudinally. A push spring is sleeved on the guide rod. The two ends of the push spring are fixedly connected to the bottom wall of the driving ring and the bottom wall of the air intake box, respectively. A touch switch is fixedly connected to the upper end of the inner circumferential wall of the connecting pipe. The touch switch is electrically connected to the electromagnetic reversing valve.

[0011] The beneficial effects achieved by the present invention using the above structure are as follows:

[0012] 1. This application utilizes the inflation of a restraint airbag to achieve flexible fixation of the limb. The device uses an airflow drive and pressure feedback mechanism to detect the syringe puncture depth without the need to judge the puncture depth, avoiding the possibility of the depth being too shallow or too deep due to differences in operating experience. It can adaptively adjust the pushing pressure and speed according to the viscosity of the drug solution, and can also detect the completion of drug delivery or needle blockage, so as to stop the injection in time. The detection of puncture depth and the detection of completion of drug delivery or needle blockage realizes that the depth is confirmed to be up to standard before starting the delivery, and the delivery is stopped immediately if there is an abnormality. This eliminates the risk of the superposition of depth misjudgment and delivery loss of control in traditional injection.

[0013] 2. The bottom wall of the positioning seat adopts an arc-shaped design, which can better fit the contour of the patient's limb. Combined with the symmetrically set restraint airbags, the limbs are flexibly fixed by inflating through an external air source. The pressure valve can precisely control the air pressure inside the restraint airbags, which can prevent the device from shifting during the injection process due to loose fixation, and also prevent the limbs from being compressed due to excessive tightness, thus affecting blood circulation.

[0014] 3. After the pressure valve detects the preset air pressure, it automatically switches the airflow direction and starts the puncture process. During the puncture, the moving ring in the air inlet tube detects the air pressure in the inner cavity. The resistance increases when the skin is in contact with the skin, and the assistance decreases when the skin is punctured. Finally, the contact switch is triggered to stop the puncture. There is no need for manual judgment of the puncture depth, avoiding the problem of the depth being too shallow or too deep due to differences in operating experience.

[0015] 4. After puncture, the injection process automatically begins. The pneumatic telescopic rod pushes the syringe to inject the medication. The drive ring and push spring in the air inlet can adaptively adjust the pushing pressure and speed according to the viscosity of the medication. When the medication becomes viscous, causing the pushing resistance to increase, the change in air pressure in the air inlet triggers the drive ring to move upward, temporarily stopping the airflow input. Pushing continues after the pressure stabilizes, avoiding needle blockage or medication backflow due to a sudden increase in pressure. When the medication is pushed out or the needle becomes blocked, the sudden increase in pressure triggers the drive ring to touch the switch, stopping it in time and avoiding injection hazards. Attached Figure Description

[0016] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the invention and do not constitute a limitation thereof.

[0017] Figure 1 This is a schematic diagram of the overall structure of an injection needle holding device with positioning and feedback functions proposed in this invention;

[0018] Figure 2 This is a schematic cross-sectional view of an injection needle holding device with positioning and feedback functions proposed in this invention.

[0019] Figure 3 This is a schematic diagram of the overall cross-sectional connection structure of an injection needle holding device with positioning and feedback functions proposed in this invention from another perspective.

[0020] Figure 4 This is a schematic diagram of the injection cylinder connection structure of an injection needle holding device with positioning and feedback functions proposed in this invention;

[0021] Figure 5 This is a schematic diagram of the air inlet pipe connection structure of an injection needle holding device with positioning and feedback functions proposed in this invention;

[0022] Figure 6This is a schematic diagram of the air inlet box connection structure of an injection needle holder device with positioning and feedback functions proposed in this invention.

[0023] In the attached diagram: 1. Positioning seat; 2. Restraint airbag; 3. Injector; 4. Sealing cap; 5. Electromagnetic reversing valve; 6. Inlet pipe; 7. Inlet box; 8. Moving plate; 31. Inner cavity; 41. Pneumatic telescopic rod; 42. Push plate; 51. Pressure valve; 61. Support rod; 62. Moving ring; 63. Guide spring; 64. Air outlet; 65. Contact switch; 71. Connecting pipe; 72. Guide rod; 73. Driving ring; 74. Push spring; 75. Contact switch; 81. Limiting cylinder; 82. Injector; 83. Compression spring.

[0024] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0026] Example 1, as Figures 1-6 As shown, the proposed solution provides an injection needle holder with positioning and feedback functions, including a positioning seat 1. The bottom wall of the positioning seat 1 is arc-shaped. A restraint airbag 2 is symmetrically fixedly connected to the side wall of the positioning seat 1. An injection cylinder 3 is fixedly connected to the top wall of the positioning seat 1. A sealing cap 4 is threadedly connected to the top of the injection cylinder 3. An electromagnetic reversing valve 5, an air inlet pipe 6, and an air inlet box 7 are fixedly connected to the top wall of the sealing cap 4. The air inlet box 7 is hollow. A moving plate 8 is longitudinally slidably connected to the inner circumferential wall of the injection cylinder 3. An inner cavity 31 is provided between the top wall of the moving plate 8, the inner circumferential wall of the injection cylinder 3, and the inner top wall of the sealing cap 4. The bottom end of the air inlet pipe 6 is connected to the inner cavity 31.

[0027] like Figures 1-3As shown, one end of the electromagnetic reversing valve 5 is connected to an external air source through an air pipe. A pressure valve 51 is fixedly connected to one side wall of the electromagnetic reversing valve 5. The pressure valve 51 is connected to the side wall of the restraint airbag 2 through an air pipe. The pressure valve 51 is electrically connected to the electromagnetic reversing valve 5. The output end of the electromagnetic reversing valve 5 is connected to the top of the air inlet pipe 6 and the top wall of the air inlet box 7 through air pipes. The external air source inputs airflow into the restraint airbag 2 through the electromagnetic reversing valve 5 and the pressure valve 51. The restraint airbag 2 inflates. The inflated restraint airbag 2 fixes the limb to the positioning seat 1. When the air pressure in the restraint airbag 2 reaches the pressure value of the pressure valve 51, the airflow stops entering the restraint airbag 2. At the same time, the electromagnetic reversing valve 5 switches the airflow output direction, and the airflow enters the inner cavity 31 through the air inlet pipe 6.

[0028] like Figures 1-5 As shown, a limiting cylinder 81 is coaxially fixedly connected to the top wall of the movable plate 8. A syringe 82 is provided inside the limiting cylinder 81. The pointed end of the syringe 82 extends out of the bottom end of the injection cylinder 3 and the positioning seat 1. A compression spring 83 is fixedly connected between the bottom wall of the movable plate 8 and the inner bottom wall of the injection cylinder 3.

[0029] like Figures 1-5As shown, a support rod 61 is fixedly connected between the bottom and top walls of the air intake pipe 6. A moving ring 62 is longitudinally slidably connected to the support rod 61. The outer circumferential wall of the moving ring 62 is longitudinally slidably connected to the inner circumferential wall of the air intake pipe 6. The lower end of the air intake pipe 6 is symmetrically provided with air outlets 64. The air intake pipe 6 communicates with the inner cavity 31 through the air outlets 64. A guide spring 63 is sleeved on the support rod 61. The two ends of the guide spring 63 are fixedly connected to the bottom wall of the moving ring 62 and the bottom wall of the air intake pipe 6, respectively. In its natural state, the guide spring 63 positions the moving ring 62 above the air outlet 64. A contact switch 65 is fixedly connected to the inner circumferential wall of the air intake pipe 6. The contact switch 65 is close to the inner bottom wall of the air intake pipe 6 and is electrically connected to the solenoid reversing valve 5. When the moving ring 62 contacts the contact switch 65, the solenoid reversing valve 5 stops communicating with the air intake pipe 6. At the same time, the solenoid reversing valve 5 communicates with the air intake box 7. When airflow is input... When the air enters the inlet pipe 6, the air pressure pushes the moving ring 62 to move and compresses the guide spring 63. When the top wall of the moving ring 62 is below the top wall of the outlet 64, the airflow enters the inner cavity 31 through the outlet 64. The air pressure in the inner cavity 31 increases, pushing the moving plate 8 to move. The moving plate 8 moves the syringe 82 closer to the patient's limb, and the compression spring 83 is compressed. When the tip of the syringe 82 contacts the skin, the resistance increases, and the pressure in the inner cavity 31 increases. The air pressure in the inner cavity 31 moves the moving ring 62 closer to the inner top wall of the inlet pipe 6. The guide spring 63 slightly resets. When the tip of the syringe 82 pierces the skin, the pressure decreases. The pressure at the top of the inlet pipe 6 is momentarily greater than the pressure in the inner cavity 31, pushing the moving ring 62 to move and compressing the spring 83. The moving ring 62 contacts the contact switch 65, and the electromagnetic reversing valve 5 stops communicating with the inlet pipe 6. At the same time, the electromagnetic reversing valve 5 is connected to the air intake box 7.

[0030] like Figures 1-5 As shown, pneumatic telescopic rods 41 are symmetrically fixedly connected to the inner top wall of the sealing cover 4. The base end of the pneumatic telescopic rod 41 is connected to the hollow part of the air inlet box 7 through an air pipe. The telescopic end of the pneumatic telescopic rod 41 is fixedly connected to a push plate 42. The bottom wall of the push plate 42 is close to the injection end of the syringe 82.

[0031] like Figures 1-3 and Figure 6As shown, a connecting pipe 71 is fixedly connected to the top wall of the air intake box 7. The top wall of the connecting pipe 71 is connected to the output end of the electromagnetic reversing valve 5 through an air pipe. The bottom end of the connecting pipe 71 is located above the inner top wall of the air intake box 7. A guide rod 72 is fixedly connected to the top end of the connecting pipe 71 and the inner bottom wall of the air intake box 7. A driving ring 73 is longitudinally slidably connected to the guide rod 72. The outer circumferential wall of the driving ring 73 is longitudinally slidably connected to the inner circumferential wall of the connecting pipe 71. A push spring 74 is sleeved on the guide rod 72. The two ends of the push spring 74 are... The connecting pipe 71 is fixedly connected to the bottom wall of the driving ring 73 and the bottom wall of the air intake box 7. A touch switch 75 is fixedly connected to the upper end of the inner circumferential wall of the connecting pipe 71. The touch switch 75 is electrically connected to the solenoid reversing valve 5. The push spring 74 is initially not compressed. When the driving ring 73 contacts the touch switch 75, the solenoid reversing valve 5 stops inputting air into the air intake box 7. When the airflow enters the connecting pipe 71, the airflow pushes the driving ring 73 to move, compressing the push spring 74. When the driving ring 73 moves to the bottom of the connecting pipe 71, the airflow passes through the hollow of the air intake box 7. The medication enters the pneumatic telescopic rod 41, which activates, causing the push plate 42 to move. The push plate 42 then moves the injection end of the syringe 82, injecting the medication into the patient. When the medication is viscous, the injection speed is slower, increasing the pressure inside the pneumatic telescopic rod 41. The air pressure in the air inlet box 7 balances with the air pressure in the connecting tube 71, causing the push spring 74 to reset. The push spring 74 then moves the ring 73 into the connecting tube 71, stopping the airflow into the air inlet box 7. As the medication is slowly injected into the patient... Inside the body, the pressure inside the pneumatic telescopic rod 41 decreases, and the airflow pushes the drive ring 73 to move below the connecting tube 71 to continue injecting the drug. When the syringe 82 is blocked or the drug injection is completed, the pressure inside the pneumatic telescopic rod 41 rises sharply, and the air pressure in the air inlet box 7 balances with the air pressure entering the connecting tube 71. The push spring 74 quickly returns to its original position, and the push spring 74 pushes the drive ring 73 close to the inner top wall of the connecting tube 71, stretching the push spring 74. The drive ring 73 contacts the touch switch 75, and the electromagnetic reversing valve 5 stops inputting air into the air inlet box 7.

[0032] The syringe 82 is placed inside the limiting cylinder 81. The pointed end of the syringe 82 passes through the injection cylinder 3 and the positioning seat 1. The sealing cap 4 is threaded onto the top of the injection cylinder 3. The positioning seat 1 is aligned with the injection position. The restraint airbag 2 is set around the limb. Then, the external air source is connected to the electromagnetic reversing valve 5. The external air source inputs airflow into the restraint airbag 2 through the electromagnetic reversing valve 5 and the pressure valve 51. The restraint airbag 2 inflates. The inflated restraint airbag 2 and the positioning seat 1 fix the limb. When the air pressure in the restraint airbag 2 reaches the pressure value of the pressure valve 51, the airflow stops entering the restraint airbag 2. At the same time, the electromagnetic reversing valve 5 switches the airflow output direction. The airflow enters the inner cavity 31 through the air inlet pipe 6.

[0033] When airflow enters the inlet pipe 6, the air pressure pushes the moving ring 62 to move and compresses the guide spring 63. When the top wall of the moving plate 8 is below the top wall of the outlet 64, the airflow enters the inner cavity 31 through the outlet 64. The air pressure in the inner cavity 31 increases, pushing the moving plate 8 to move. The moving plate 8 drives the syringe 82 closer to the patient's limb, and the compression spring 83 is compressed. When the tip of the syringe 82 contacts the skin, the resistance increases, and the pressure in the inner cavity 31 increases. The air pressure in the inner cavity 31 drives the moving ring 62 closer to the inner top wall of the inlet pipe 6. The guide spring 63 slightly resets. When the tip of the syringe 82 pierces the skin, the pressure decreases. The pressure at the top of the inlet pipe 6 is momentarily greater than the pressure in the inner cavity 31, pushing the moving ring 62 to move and compressing the spring 83. The moving ring 62 contacts the contact switch 65, and the electromagnetic reversing valve 5 stops communicating with the inlet pipe 6. At the same time, the electromagnetic reversing valve 5 is connected to the air inlet box 7.

[0034] When the electromagnetic reversing valve 5 is connected to the air inlet box 7, the airflow enters the connecting pipe 71, pushing the drive ring 73 to move, compressing the push spring 74. The drive ring 73 moves below the connecting pipe 71, and the airflow enters the pneumatic telescopic rod 41 through the hollow part of the connecting pipe 71 and the air inlet box 7. The pneumatic telescopic rod 41 is activated, driving the push plate 42 to move. The push plate 42 drives the injection end of the syringe 82 to move, injecting the drug in the syringe 82 into the patient's body. When the drug is more viscous, the injection speed is slower, and the pressure in the pneumatic telescopic rod 41 increases. The air pressure in the air inlet box 7 is balanced with the air pressure entering the connecting pipe 71, and the push spring 74 pushes the drive ring 73 to move. The moving ring 73 moves into the connecting tube 71, and the airflow stops entering the air inlet box 7. As the drug is slowly injected into the patient's body, the pressure in the pneumatic telescopic rod 41 decreases. The airflow pushes the moving ring 73 to move below the connecting tube 71 to continue injecting the drug. When the syringe 82 is blocked or the drug injection is completed, the pressure in the pneumatic telescopic rod 41 rises sharply. The air pressure in the air inlet box 7 is balanced with the air pressure entering the connecting tube 71. The push spring 74 quickly returns to its original position. The push spring 74 pushes the moving ring 73 close to the top wall of the connecting tube 71, stretching the push spring 74. The moving ring 73 contacts the touch switch 75, and the electromagnetic reversing valve 5 stops inputting air into the air inlet box 7.

[0035] When the syringe 82 is blocked or the drug injection is completed, the solenoid reversing valve 5 stops inputting air into the air inlet box 7, the external air source stops communicating with the solenoid reversing valve 5, the restraining airbag 2 and the positioning seat 1 are removed, the sealing cover 4 is removed, the pressure in the inner cavity 31 is released, the compression spring 83 is reset, and then the blocked syringe 82 or the syringe 82 that has been injected with the drug is removed from the limiting cylinder 81.

[0036] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. An injection needle holding device with positioning and feedback function, comprising a positioning seat (1), characterized in that: The positioning seat (1) is symmetrically fixedly connected to a restraint airbag (2) on its side wall. The positioning seat (1) is fixedly connected to a syringe (3) on its top wall. The top of the syringe (3) is threadedly connected to a sealing cap (4). The top wall of the sealing cap (4) is fixedly connected to an electromagnetic reversing valve (5), an air inlet pipe (6), and an air inlet box (7). The air inlet box (7) is hollow. The inner circumferential wall of the syringe (3) is longitudinally slidably connected to a moving plate (8). An inner cavity (31) is provided between the top wall of the moving plate (8), the inner circumferential wall of the syringe (3), and the inner top wall of the sealing cap (4). The bottom end of the air inlet pipe (6) is connected to the inner cavity (31). The top wall of the movable plate (8) is coaxially fixedly connected to a limiting cylinder (81), and a syringe (82) is provided inside the limiting cylinder (81). The spike end of the syringe (82) extends out of the bottom end of the syringe (3) and the positioning seat (1). A support rod (61) is fixedly connected between the bottom wall and the top wall of the air intake pipe (6). A moving ring (62) is slidably connected on the support rod (61). An air outlet (64) is symmetrically provided at the lower end of the air intake pipe (6). The air intake pipe (6) is connected to the inner cavity (31) through the air outlet (64). The moving ring (62) is located above the air outlet (64) in its natural state. A contact switch (65) is fixedly connected to the inner circumferential wall of the air intake pipe (6). The contact switch (65) is electrically connected to the electromagnetic reversing valve (5). The inner top wall of the sealing cap (4) is symmetrically fixedly connected with a pneumatic telescopic rod (41). The base end of the pneumatic telescopic rod (41) is connected to the hollow part of the air inlet box (7) through an air pipe. The telescopic end of the pneumatic telescopic rod (41) is fixedly connected with a push plate (42). The bottom wall of the push plate (42) is close to the injection end of the syringe (82).

2. The injection needle holder with positioning and feedback functions according to claim 1, characterized in that: The top wall of the air intake box (7) is fixedly connected to a connecting pipe (71). The top wall of the connecting pipe (71) is connected to the output end of the electromagnetic reversing valve (5) through an air pipe. The top end of the connecting pipe (71) is fixedly connected to the inner bottom wall of the air intake box (7) with a guide rod (72). A driving ring (73) is longitudinally slidably connected to the guide rod (72). A touch switch (75) is fixedly connected to the upper end of the inner circumferential wall of the connecting pipe (71). The touch switch (75) is electrically connected to the electromagnetic reversing valve (5). The driving ring (73) is initially located below the touch switch (75).

3. The injection needle holder with positioning and feedback functions according to claim 2, characterized in that: A pressure valve (51) is fixedly connected to one side wall of the electromagnetic reversing valve (5). The pressure valve (51) is connected to the side wall of the restraint airbag (2) through an air pipe. The pressure valve (51) is electrically connected to the electromagnetic reversing valve (5). When the moving ring (62) contacts the contact switch (65), the electromagnetic reversing valve (5) stops communicating with the air intake pipe (6). When the driving ring (73) contacts the contact switch (75), the electromagnetic reversing valve (5) stops inputting air into the air intake box (7).

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