Novel injection device with adjustable injection depth

Abstract

The utility model discloses a novel injection device capable of adjusting injection depth. The novel injection device comprises two injection tubes with different lengths, a propelling mechanism arranged on the inner sides of the injection tubes, and an injection mechanism arranged on one side of the propelling mechanism, the injection tube is arranged in a straight tube shape with one sealed end and is hollow, threads are formed in the injection tube, and the propelling mechanism and the injection mechanism are both arranged on the inner side of the injection tube; the propelling mechanism comprises a propelling block, a rotating ring in sliding connection with the propelling block, and a first spring fixedly connected with the propelling block; the two ends of the first spring are fixedly connected with the injection tube and the pushing block respectively, and a fixing piece is arranged in the pushing block. The injection mechanism comprises a base, an injection part arranged on the base and a medicine bin in threaded connection with the inner side of the injection tube; the base is fixedly connected to one side of the pushing block; by means of rotation of the traction shaft in the injection part, the withdrawing effect can be achieved by rotating the traction shaft in the malignant tumor operation process.

Description

Technical Field

[0001] The utility model relates to the field of injection devices, in particular to a novel injection device with adjustable injection depth. Background Art

[0002] In the field of clinical medicine, gynecological tumors are a common type of gynecological malignant tumor, and surgical treatment is one of its main treatment methods. During surgery, doctors often need to use injection devices to inject various drugs or liquids into patients, such as chemotherapy drugs, saline, contrast agents, etc., to assist surgical operations or improve treatment effects. Traditional injection devices are mainly composed of syringes, piston rods, and injection needles. During the injection process, the doctor pushes the piston rod to allow the drug or liquid in the syringe to enter the patient's body through the injection needle. Indocyanine green is a dye with development function under the near-infrared spectrum. It is commonly used to identify tumor edges, mark lymph nodes, and evaluate tissue blood flow status. This substance is widely used as a lymphatic tracer in gynecological tumor surgery, especially in the process of lymph node clearance. Although the existing injection devices meet the basic needs of surgery to a large extent,

[0003] Existing injection technologies such as the existing utility model patent application number 202322024544.9 are a fully automatic liquid medicine injection device: applied to the technical field of injection devices, the fully automatic liquid medicine injection device includes: a syringe adapter, provided with a push rod, a drive assembly and a force measuring assembly, the push rod can be raised and lowered on the syringe adapter, the drive assembly is connected to the push rod, and the force measuring assembly is used to detect the thrust value of the push rod; the syringe is installed on the syringe adapter, the syringe includes a cylinder shell and a piston, one end of the cylinder shell is provided with a liquid hole, and the other end is connected to the needle cylinder adapter; wherein, one end of the push rod can extend into the cylinder shell from the opening or withdraw from the cylinder shell, used to connect the piston and drive it to move, and there are certain limitations for injections using indocyanine green. First, indocyanine green is injected shallowly at a depth of 0.1-0.3 cm and then deeply at a depth of 1-2 cm. However, existing devices require doctors to judge the injection depth based on their personal experience during the injection process. This method will lead to inconsistent injection depth in actual operation, affecting the imaging effect.

[0004] Therefore, it is necessary to improve a novel injection device with adjustable injection depth in the prior art and propose an injection device with adjustable injection depth to solve the above problems. Summary of the Invention

[0005] The utility model overcomes the deficiencies of the prior art, provides a novel injection device with adjustable injection depth, and aims to solve the problems raised in the prior art.

[0006] To achieve the above-mentioned object, the technical solution adopted by the present invention is as follows: a new injection device with adjustable injection depth, comprising: an injection tube, a propulsion mechanism arranged inside the injection tube, and an injection mechanism arranged on one side of the propulsion mechanism;

[0007] The injection tube is a straight tube with one end sealed, the interior is hollow, and there is a thread inside. The propulsion mechanism and the injection mechanism are both arranged inside the injection tube;

[0008] The propulsion mechanism includes a propulsion block, a rotating ring slidably connected to the propulsion block, and a first spring fixedly connected to the propulsion block; the two ends of the first spring are respectively fixedly connected to the injection tube and the propulsion block, and a fixing member is provided in the propulsion block;

[0009] The injection mechanism includes: a base, an injection piece arranged on the base, and a medicine chamber threadedly connected to the inner side of the injection tube; the base is fixedly connected to one side of the propulsion block, and the circumference of the base is slidably connected to the injection tube.

[0010] In a preferred embodiment of the present invention, a thread is provided on the outer side of the circumference of one end of the injection tube and is threadedly connected to the inner side of the rotating ring, and the rotating ring of the injection tube is slidably connected to the propulsion block.

[0011] In a preferred embodiment of the present invention, the injection tube is provided with a plurality of fixing grooves at one sealed end. The fixing grooves are arranged in a semi-spherical shape, and each fixing groove has an overlapping portion with an adjacent fixing groove, and the overlapping portion accounts for one third of the total volume of the fixing groove.

[0012] In a preferred embodiment of the present invention, the fixing member includes an electromagnet, fixing balls disposed on both sides of the electromagnet, and a second spring fixedly connected to the fixing balls and the electromagnet respectively; the electromagnet is electrically connected to the push switch.

[0013] In a preferred embodiment of the present invention, the push-type switch includes a push button, two contact pads arranged on the inner side of the push button, and a third spring; the two ends of the third spring are respectively fixedly connected to the push button and the injection tube, and the two contact pads are respectively arranged at the hollow position between the two ends of the third spring and are respectively electrically connected to the electromagnet.

[0014] In a preferred embodiment of the present utility model, the injection part includes a telescopic tube and a top plate arranged on the inner side of the telescopic tube; a fourth spring is fixedly connected between the top plate and the base; a traction shaft is rotatably connected to the inner side of the base, a traction rope is fixedly connected between the traction shaft and the top plate, and the traction shaft is slidably connected to the injection tube.

[0015] In a preferred embodiment of the present invention, a thread is provided on the outer side of the medicine bin, which is threadedly connected to the inner side of the injection tube. Both ends of the medicine bin are open, and a sliding plate is slidably connected inside the medicine bin.

[0016] In a preferred embodiment of the present invention, the centers of the medicine bin and the telescopic tube are located in the same horizontal plane. The medicine bin is close to one end of the telescopic tube, the opening diameter of the medicine bin at this end is larger than the diameter of the telescopic tube, and the other end is provided with an injection part.

[0017] In a preferred embodiment of the present invention, the injection part includes a connector and an injection needle fixedly connected to the top of the connector; the connector is threadedly connected to the medicine chamber, and spikes are evenly arranged on one side of the connector that contacts the medicine chamber opening.

[0018] The present invention solves the defects in the background technology and has the following beneficial effects:

[0019] 1. The present invention provides a novel injection device with adjustable injection depth. By equipping the device with two injection needles of different lengths, and providing a hydrophobic coating on the inner surface of the injection needle in contact with the liquid medicine, and using a transparent material to make the injection needle, it is possible to clearly determine whether the injection needle has entered the blood vessel when the injection needle is withdrawn after the air is evacuated. Compared with the prior art, when it is necessary to determine whether some dark liquid medicines have entered the blood vessel during injection, the accuracy of the injection is greatly improved.

[0020] 2. The utility model provides a new injection device with adjustable injection depth. By setting two injection needles of different lengths, the two different injection needles can be replaced when performing injection operations such as gynecological tumor tracer injection, which require injection according to a specified length. The injection needle length is the length required for injection, so as to control the injection depth. Compared with the existing technology, the injection device is converted from injection based on experience using ordinary injection needles to injection using injection needles of different lengths, thereby converting empirical judgment into actual visible judgment, thereby greatly improving the accuracy of injection.

[0021] 3. The present invention provides a novel injection device with adjustable injection depth. Through the mutual cooperation between the medicine chamber, the injection piece and the fixing piece, and through the split design of the medicine chamber and the injection tube, the medicine chamber can be threadedly connected to the injection tube to fix the injection of medicine. Compared with the existing technology, the present injection device achieves the effect of reusability. Only the medicine chamber needs to be replaced, which avoids a large number of disposable injection tubes causing a large amount of waste. Moreover, through the rotation of the traction shaft in the injection piece, the traction shaft can be rotated to achieve the effect of withdrawal during the operation of malignant tumors, so as to check whether the injection device has pierced the blood vessel during the injection process, and adjust the injection device accordingly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below with reference to the accompanying drawings and embodiments;

[0023] Figure 1 It is a three-dimensional structural diagram of a preferred embodiment of the utility model;

[0024] Figure 2 It is a schematic cross-sectional view of the overall structure of a preferred embodiment of the present utility model;

[0025] Figure 3 1 is a schematic cross-sectional view of a fixing member according to a preferred embodiment of the present invention;

[0026] In the picture:

[0027] 1. Injection tube; 10. Fixing groove;

[0028] 2. Propulsion mechanism; 20. Propulsion block; 21. Rotating ring; 22. First spring; 23. Fixing member; 24. Fixing ball; 25. Electromagnet; 26. Second spring; 27. Press key;

[0029] 3. Injection mechanism; 30. Base; 31. Injection piece; 32. Medicine chamber; 33. Telescopic tube; 34. Top plate; 35. Fourth spring; 36. Sliding plate; 37. Injection needle. DETAILED DESCRIPTION

[0030] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show components related to the present invention.

[0031] As shown in the figure, a new injection device with adjustable injection depth includes: an injection tube 1, a propulsion mechanism 2 arranged inside the injection tube 1, and an injection mechanism 3 arranged on one side of the propulsion mechanism 2, characterized in that;

[0032] The injection tube 1 is in the shape of a straight tube with one end sealed, the interior is hollow, and a thread is provided inside. The propulsion mechanism 2 and the injection mechanism 3 are both arranged inside the injection tube 1;

[0033] In a preferred embodiment of the present invention, a thread is provided on the outer side of the circumference of one end of the injection tube 1 and is threadedly connected to the inner side of the rotating ring 21 . The rotating ring 21 of the injection tube 1 is slidably connected to the propulsion block 20 .

[0034] In a preferred embodiment of the present invention, the injection tube 1 is provided with a plurality of fixing grooves 10 at one sealed end. The fixing grooves 10 are arranged in a semi-spherical shape, and each fixing groove 10 has an overlapping portion with an adjacent fixing groove 10 , and the overlapping portion accounts for one third of the total volume of the fixing groove 10 .

[0035] It should be noted that the injection tube 1 is a hollow tube in the shape of a groove. One end of the injection tube 1 is closed and the other end is open. The propulsion mechanism 2 and the injection mechanism 3 are both arranged on the inside of the injection tube 1. The propulsion mechanism 2 is arranged at the closed end of the injection tube 1, and the injection mechanism 3 is arranged at the open end. The rotating ring 21 is arranged on the outside of the injection tube 1. The rotating ring 21 is threadedly connected to the injection tube 1, and the rotating ring 21 moves up and down on the injection tube 1 through the thread.

[0036] The propulsion mechanism 2 includes a propulsion block 20, a rotating ring 21 slidably connected to the propulsion block 20, and a first spring 22 fixedly connected to the propulsion block 20; both ends of the first spring 22 are fixedly connected to the injection tube 1 and the propulsion block 20, respectively, and a fixing member 23 is provided in the propulsion block 20;

[0037] It should be noted that the push block 20 is arranged at the closed end of the inner side of the injection tube 1, and the injection tube 1 is slidingly connected to the push block 20. A push groove is provided in the sliding connection part between the injection tube 1 and the push block 20. The push block 20 is arranged in a circular shape, and push protrusions are provided on two opposite parts on the circumference of the push block 20. The push protrusions are located in the push groove, and the push block 20 is slidingly connected to the rotating ring 21 through the push protrusion, and as the rotating ring 21 rotates, the rotating ring 21 moves up and down on the injection tube 1, and drives the push block 20 to move up and down through the push protrusion. A through hole is provided on the inside of the push protrusion, and a fixing part 23 is provided on the inside of the through hole. The fixing part 23 is used to fix the position of the push block 20.

[0038] During operation, the device is used to start injection, and the rotating ring 21 is rotated to drive the propulsion block 20 to move upward. At this time, the first spring 22 is stretched, and the injection mechanism 3 squeezes the inside of the medicine chamber 32, so that the air inside the medicine chamber 32 is discharged until the medicine chamber 32 is completely expelled and the medicine liquid is exposed. The propulsion block 20 is then fixed by the fixing member 23 to prevent the air in the medicine chamber 32 from being injected into the human body, and to prevent the propulsion block 20 from shaking or being pulled back by the first spring 22.

[0039] In a preferred embodiment of the present invention, the fixing member 23 includes an electromagnet 25, fixing balls 24 disposed on both sides of the electromagnet 25, and a second spring 26 fixedly connected to the fixing balls 24 and the electromagnet 25 respectively; the electromagnet 25 is electrically connected to the push switch.

[0040] It should be noted that the fixing part 23 is arranged in the through hole of the pushing protrusion, and the position of the through hole of the pushing protrusion is opposite to the fixed groove 10. The fixed groove 10 is opened on both sides of the slide of the injection tube 1, and the fixed groove 10 is arranged in a semi-spherical shape. There are several fixed grooves 10, and they are symmetrically arranged on both sides of the slide. There are overlapping parts in the several fixed grooves 10 on both sides of the slide. The overlapping part is one-third of the entire fixed groove 10. The overlapping part is the two opposite edges of the fixed groove 10, and the other two-thirds are used to fix the fixing part 23 of the fixed groove 10. The overlapping part reduces the spacing required to move the fixed pushing block 20, so that the pushing block 20 has more fixed position options. The fixing part 23 is composed of three parts: an electromagnet 25, a fixed ball 24 and a second spring 26.

[0041] During operation, the electromagnet 25 is arranged at the middle position of the inner side of the through hole of the propulsion block. When the propulsion block 20 moves upward, it drives the fixing part 23 to move upward until the air in the medicine chamber 32 is completely exhausted. During this process, the push-type switch is not connected, and the electromagnet 25 has no magnetic force. The second springs 26 on both sides of the electromagnet 25 push the fixed balls 24 on both sides to be stuck in the fixed groove 10, thereby achieving the effect of fixing the propulsion block 20. After the injection is completed, the injection mechanism 3 needs to be reset for the next use. The push-type switch is connected and the power is turned on. Since only the fixed ball 24 is made of metal iron, the electromagnet 25 has magnetic force after the power is turned on, thereby adsorbing the fixed ball 24 and compressing the second spring 26. At this time, the propulsion block 20 cannot be fixed, and the first spring 22 recovers its deformation to pull the propulsion block 20 and the rotating ring 21 back to their original position.

[0042] In a preferred embodiment of the present invention, the push-type switch includes a push button 27, two contact pads arranged on the inner side of the push button 27, and a third spring; the two ends of the third spring are fixedly connected to the push button 27 and the injection tube 1 respectively, and the two contact pads are respectively arranged at the hollow position in the middle of the two ends of the third spring, and are respectively electrically connected to the electromagnet 25.

[0043] It should be noted that the third spring is arranged on the inside of the press key 27, and the press key 27 is fixedly connected to the outside of the closed end of the injection tube 1. The two ends of the third spring are fixedly connected to the press key 27 and the injection tube 1 respectively. A power supply is provided on the inside of the thrust block 20, and two metal gaskets for connection are provided at both ends of the third spring. The two metal gaskets, the power supply and the electromagnet 25 are connected in series to form a loop. When the press key 27 is pressed downward and the third spring is compressed, the two metal gaskets contact to form a closed loop, the series circuit is connected, and the electromagnet 25 generates magnetic force. When the press key 27 is not pressed, the two metal gaskets are separated, the loop is open, the series circuit is not connected, and the electromagnet 25 has no magnetic force.

[0044] The injection mechanism 3 includes: a base 30, an injection piece 31 arranged on the base 30, and a medicine chamber 32 threadedly connected to the inner side of the injection tube 1; the base 30 is fixedly connected to one side of the propulsion block 20, and the base 30 is circumferentially connected to the injection tube 1 in a sliding manner.

[0045] In a preferred embodiment of the present invention, the injection piece 31 includes a telescopic tube 33 and a top plate 34 arranged on the inner side of the telescopic tube 33; a fourth spring 35 is fixedly connected between the top plate 34 and the base 30; a traction shaft is rotatably connected to the inner side of the base 30, a traction rope is fixedly connected between the traction shaft and the top plate 34, and the traction shaft is slidably connected to the injection tube 1.

[0046] It should be noted that the base 30 is connected to the injection tube 1 for sliding up and down, the telescopic tube 33 is fixedly connected to the center of the base 30, the top plate 34 is fixedly connected to the top of the telescopic tube 33, the telescopic tube 33 is formed by a plurality of sleeve rods connected in a sliding manner, the fourth spring 35 is arranged on the inner side of the telescopic tube 33, and a cavity is provided inside the base 30. The cavity is L-shaped as a whole, and a rectangular cavity is provided at the L-shaped corner for storing the traction rope. The two ends of the L-shaped cavity extend to the fourth spring 35 and the injection tube 1 respectively. The injection tube 1 is provided with a movable groove at the position where the L-shaped mouth corresponds to the vertical plane of the injection tube 1. The traction shaft is arranged in the movable groove and extends from the movable groove to the rectangular cavity. The two ends of the traction rope are fixedly connected to the rectangular cavity and the top plate 34 respectively. At the part where the traction rope and the traction shaft contact, the traction shaft is in a mountain shape, and the traction rope is wrapped around the traction shaft in the mountain-shaped part, so that when the traction shaft rotates, the traction rope is driven to wrap around the traction shaft or loosen the traction shaft, thereby controlling the length of the traction rope. A rectangular groove is provided on the movable groove, and a rectangular part is also provided on the traction shaft. When the traction shaft does not need to be rotated, the traction shaft is fixed by clamping the rectangular part on the traction shaft on the rectangular groove.

[0047] During operation, before injection, most of the traction rope is wrapped around the traction shaft, and the remaining 1-2 cm distance of the telescopic rod is fully retracted. The fourth spring 35 is compressed, and by rotating the rotating ring 21, the propulsion block 20 is driven to move upward, thereby pushing the base 30 slidably connected to the injection tube 1 to move upward, thereby pushing the top plate 34 upward through the telescopic rod, so that the telescopic rod enters the medicine chamber 32 from the bottom of the medicine chamber 32 and engages with the sliding plate. As the top plate 34 moves upward, it pushes the sliding plate up, thereby completely removing the air in the medicine chamber 32, and then the injection is performed. Since in clinical gynecological tumor surgery, a certain amount of indocyanine green (ICG) needs to be injected into the cervix rather than into the blood vessels, when injecting, it is only necessary to align the injection device with the cervix for operation, and then rotate the traction shaft to further compress the fourth spring 35, so that the telescopic tube 33 is fully retracted, and the top plate 34 drives the sliding plate to move in the opposite direction, thereby realizing the withdrawal of the medicine chamber 32. At this time, observe whether there is blood reflux in the injection needle 37, and then decide whether to inject.

[0048] In a preferred embodiment of the present invention, the outer side of the medicine bin 32 is provided with a thread, which is connected to the inner side of the injection tube 1 by thread. The two ends of the medicine bin 32 are open, and a sliding plate 36 is slidably connected to the medicine bin 32.

[0049] It should be noted that the outer circumference of the medicine bin 32 is connected to the injection hook thread, so that the medicine bin 32 can be directly replaced during the reuse of the device. The openings at both ends of the medicine bin 32 are the inlet at the end away from the top plate 34 and the outlet at the other end. During the packaging process of the medicine bin 32, the medicine liquid is injected from the inlet. The injection amount of the medicine liquid is the amount used once. After the injection is completed, a film is used to seal the inlet. At this time, the sliding plate is located at the outlet, and the sliding plate and the medicine bin 32 are sealed, so that the interior of the medicine bin 32 is in a closed state. In this state, the opening of the medicine chamber 32 is larger than the diameter of the telescopic rod, and a clamping groove is provided on the side where the sliding plate contacts the top plate 34, and a clamping shaft is provided on the side where the top plate 34 contacts the sliding plate. When the top plate 34 moves upward, the clamping shaft contacts the clamping groove, and the front end of the clamping shaft is triangular, and the clamping groove pushes the clamping shaft to open outward to produce a slight deformation, thereby clamping the sliding plate. After the injection is completed, the traction rope pulls the top plate 34 to restore, and the clamping shaft drives the sliding plate to move to the opening, receives the opening limit at the opening, and the clamping shaft disengages from the clamping groove.

[0050] In a preferred embodiment of the present invention, the centers of the medicine chamber 32 and the telescopic tube 33 are located in the same horizontal plane. The medicine chamber 32 is close to one end of the telescopic tube 33. The opening diameter of the medicine chamber 32 at this end is larger than the diameter of the telescopic tube 33. The other end is provided with an injection part.

[0051] In a preferred embodiment of the present invention, the injection part includes a connector and an injection needle 37 fixedly connected to the top of the connector; the connector is threadedly connected to the medicine chamber 32, and spikes are evenly arranged on one side of the connector that contacts the opening of the medicine chamber 32.

[0052] The connector is threadedly connected to the entrance end of the medicine bin 32. Before injection, the injection part and the medicine bin 32 are separately packaged. First, the medicine bin 32 is fixed to the inner side of the injection tube 1 by thread, and then the injection part is fixedly connected to the medicine bin 32 by threaded connection. When the air is exhausted through the top plate 34 and the sliding plate, the sliding plate moves upward, so that the sliding plate moves toward the entrance in the medicine bin 32, so that the space between the entrance in the medicine bin and the sliding plate is squeezed and the pressure is increased. The sealing film at the entrance is pierced by the sharp thorns on the connector, and the sharp thorns are provided with grooves, so that the medicine in the medicine bin 32 flows along the grooves to the injection needle 37 until a drop of medicine flows out of the injection needle 37. At this time, the air from the medicine bin to the injection needle 37 is completely exhausted, and then the injection needle 37 is injected into the body.

[0053] The injection needle 37 and the connector are also fixedly connected and replaced by a threaded connection. Two injection needles 37 are provided in this device. The two injection needles 37 are made of the same material and are both conical with a cylindrical configuration on the outside. The cylindrical configuration is provided at the bottom of the cone. The inside of the cylindrical configuration is provided with a thread for connection with the connector. The outside of the cylindrical configuration is provided with a striped recessed groove. A protective shell is also provided on the outside of the injection needle 37. The protective shell can be snapped into the recessed groove on the outside of the cylindrical configuration to prevent the injection needle 37 from being contaminated when unsealed and to prevent the injection needle 37 from causing harm to medical staff due to improper operation. The inside of the injection needle 37 is a central The hollow shape is set, and its inner surface is provided with a hydrophobic coating, so that during the injection of dark liquid medicine, it is necessary to perform a back-drawing operation to check whether the injection needle 37 has entered the blood vessel. During the back-drawing process, due to the hydrophobic layer, the dark liquid medicine will not stick to the surface of the injection needle 37, and the injection needle 37 is made of a transparent material, so that during the back-drawing process, the dark liquid medicine in the injection needle 37 is under pressure and the dark liquid medicine is drawn back without sticking to the injection needle 37 and blocking the line of sight. At the same time, if the injection needle 37 enters the blood vessel, blood will be drawn out, otherwise blood cannot be drawn out, so as to check whether the injection needle 37 has entered the blood vessel. , so that the device can be used for the injection of SLN tracers for gynecological tumors. Since the injected liquid is dark in color and is injected into the cervix rather than the blood vessels, it is difficult to judge whether it has been injected into the blood vessels during the injection process. The device provides a hydrophobic layer on the inner surface of the injection needle 37 so that the dark liquid will not stick to the injection needle 37 when it is withdrawn. At the same time, if the injection needle 37 enters the blood vessel, blood will be withdrawn, otherwise no blood will be withdrawn. This process can be observed through the transparent injection needle 37 for judgment. In addition, the injection device of the present application is provided with two injection needles 37, which differ only in length, with one being shorter. The other is a deeper injection needle 37. During the production process, three shorter injection needles 37 of 0.1-0.3 cm can be produced, with a length difference of 0.1 cm for each, and two deeper injection needles 37 of 1-2 cm can be produced. In the process of injecting SLN tracers for gynecological tumors, it is necessary to first use the shorter injection needle 37 for shallow injection, and then replace it with the deeper injection needle 37 for deep injection. This type of injection can also convert the injection that requires the doctor to judge the depth of the injection needle 37 based on his own experience into an injection that relies on the injection needle 37 to judge the depth. When the injection needle 37 is completely inserted into the body, it is the required injection depth.

[0054] The above description is based on the ideal embodiment of the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A novel injection device with adjustable injection depth, comprising: An injection tube (1), a propulsion mechanism (2) arranged inside the injection tube (1), and an injection mechanism (3) arranged on one side of the propulsion mechanism (2), characterized in that; The injection tube (1) is in the form of a straight tube with one end sealed, is hollow inside, and is provided with a thread inside. The propulsion mechanism (2) and the injection mechanism (3) are both arranged inside the injection tube (1); The propulsion mechanism (2) comprises a propulsion block (20), a rotating ring (21) slidably connected to the propulsion block (20), and a first spring (22) fixedly connected to the propulsion block (20); both ends of the first spring (22) are fixedly connected to the injection tube (1) and the propulsion block (20), respectively, and a fixing member (23) is provided in the propulsion block (20); The injection mechanism (3) comprises: a base (30), an injection piece (31) arranged on the base (30), and a medicine chamber (32) threadedly connected to the inner side of the injection tube (1); the base (30) is fixedly connected to one side of the propulsion block (20), and the circumference of the base (30) is slidably connected to the injection tube (1).

2. A novel injection device with adjustable injection depth according to claim 1, characterized in that: A thread is provided on the outer side of the circumference of one end of the injection tube (1) and is threadedly connected to the inner side of the rotating ring (21). The injection tube (1) and the rotating ring (21) are both slidably connected to the propulsion block (20).

3. The novel injection device with adjustable injection depth according to claim 1, characterized in that: The injection tube (1) is provided with a plurality of fixing grooves (10) at one sealed end. The fixing grooves (10) are arranged in a semi-spherical shape, and each fixing groove (10) has an overlapping portion with an adjacent fixing groove (10), and the overlapping portion accounts for one third of the total volume of the fixing groove (10).

4. The novel injection device with adjustable injection depth according to claim 1, characterized in that: The fixing member (23) includes an electromagnet (25), fixing balls (24) arranged on both sides of the electromagnet (25), and a second spring (26) fixedly connected to the fixing balls (24) and the electromagnet (25) respectively; the electromagnet (25) is electrically connected to the push switch.

5. The novel injection device with adjustable injection depth according to claim 4, characterized in that: The push-type switch comprises a push button (27), two contact pads arranged on the inner side of the push button (27), and a third spring; the two ends of the third spring are fixedly connected to the push button (27) and the injection tube (1), respectively; the two contact pads are respectively arranged at the hollow position between the two ends of the third spring, and are respectively electrically connected to the electromagnet (25).

6. The novel injection device with adjustable injection depth according to claim 1, characterized in that: The injection piece (31) includes a telescopic tube (33) and a top plate (34) arranged on the inner side of the telescopic tube (33); a fourth spring (35) is fixedly connected between the top plate (34) and the base (30); a traction shaft is rotatably connected to the inner side of the base (30), a traction rope is fixedly connected between the traction shaft and the top plate (34), and the traction shaft is slidably connected to the injection tube (1).

7. The novel injection device with adjustable injection depth according to claim 1, characterized in that: The medicine bin (32) is provided with a thread on the outer side of the circumference, and is threadedly connected to the inner side of the injection tube (1). Both ends of the medicine bin (32) are open, and a sliding plate (36) is slidably connected inside the medicine bin (32).

8. The novel injection device with adjustable injection depth according to claim 6, characterized in that: The centers of the medicine bin (32) and the telescopic tube (33) are located in the same horizontal plane. The medicine bin (32) is close to one end of the telescopic tube (33). The opening diameter of the medicine bin (32) at this end is larger than the diameter of the telescopic tube (33). The other end is provided with an injection part.

9. The novel injection device with adjustable injection depth according to claim 8, characterized in that: The injection part includes a connecting piece and an injection needle (37) fixedly connected to the top of the connecting piece; the connecting piece is threadedly connected to the medicine chamber (32), and the side of the connecting piece that contacts the opening of the medicine chamber (32) is evenly provided with spikes, and two injection needles (37) are provided, and the two injection needles (37) are of different lengths.

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