Portable needleless injector

Abstract

The invention relates to the technical field of needleless injectors, in particular to a portable needleless injector, which comprises a mounting unit, an injection unit and a control unit, the force storage unit comprises a moving rod arranged in the mounting cavity in a sliding manner, a first elastic piece arranged between the moving rod and the mounting cavity, and a driving assembly arranged in the mounting cavity and matched with the moving rod; the triggering unit comprises a limiting assembly matched with the moving rod; and the needle head unit comprises a needle tube communicated with the mounting cavity and a piston rod arranged in the needle tube in a sliding manner. According to the portable needleless injector, the moving rod can be controlled by the driving assembly to extrude the first elastic piece and then is limited by the limiting assembly to move, the effect of force storage is achieved, then the moving rod is ejected out under the elastic force of the first elastic piece by making contact with the limitation of the moving rod, and meanwhile the moving rod can control the piston rod to move to extrude and spray out liquid medicine in the needle tube.

Description

Technical Field

[0001] The present invention relates to the technical field of needle-free syringes, in particular to a portable needle-free syringe. Background Art

[0002] The needle-free syringe mainly uses the pressure jet principle to generate pressure through the internal pressure device, pushing the liquid medicine in the medicine tube through the micropores to form an extremely fine liquid medicine column, so that the liquid medicine instantly penetrates the human epidermis and reaches the subcutaneous tissue. The liquid medicine is absorbed in the subcutaneous tissue in a diffuse state with a diameter of 3-5 cm.

[0003] Existing needle-free syringes are relatively large in size and include batteries, drive motors, injection mechanisms and other components. They are generally used in specific spaces, such as drug injection rooms, which have infrastructure to ensure timely replenishment of electricity and medicine. Such syringes are not easy to carry and cannot be used for injections anytime and anywhere. Summary of the Invention

[0004] In view of the above problems existing in the existing portable needle-free injector, the present invention is proposed.

[0005] Therefore, the purpose of the present invention is to provide a portable needle-free syringe, which aims to provide a syringe that can be used outside a specific location, so that injection operations can be performed anytime and anywhere.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a portable needle-free syringe, comprising: a mounting unit including a mounting cavity;

[0007] a power storage unit comprising a moving rod slidably disposed in the mounting cavity, a first elastic member disposed between the moving rod and the mounting cavity, and a driving assembly disposed in the mounting cavity and cooperating with the moving rod; and

[0008] A trigger unit, comprising a limiting assembly cooperating with the moving rod, wherein the limiting assembly is used to fix the moving rod;

[0009] The needle unit comprises a needle tube connected to the mounting cavity and a piston rod slidably disposed in the needle tube;

[0010] The piston rod cooperates with the moving rod.

[0011] As a preferred embodiment of the portable needle-free syringe of the present invention, the mounting unit includes a mounting tube, the mounting tube includes an internal space and a groove provided on a side of the mounting tube and communicating with the internal space;

[0012] The groove and the internal space form a mounting cavity;

[0013] The moving rod is installed in the inner space, and the driving assembly is installed in the groove.

[0014] As a preferred solution of the portable needle-free injector of the present invention, wherein: the driving assembly includes a long rod movably arranged in the installation cavity, and a control part arranged at the end of the long rod;

[0015] The control portion is matched with the end portion of the moving rod, and the control portion can control the moving rod to move and squeeze the first elastic member.

[0016] As a preferred solution of the portable needle-free syringe of the present invention, a second elastic member is installed between the long rod and the groove.

[0017] As a preferred embodiment of the portable needle-free injector of the present invention, the limiting assembly includes a first limiting block disposed in the mounting cavity, and a third elastic member disposed between the mounting cavity and the first limiting block;

[0018] The movable rod is provided with a slot;

[0019] The first limiting block matches the slot.

[0020] As a preferred solution of the portable needle-free syringe of the present invention, wherein: a first avoidance groove is provided on the first limiting block;

[0021] The moving rod passes through the first avoidance groove;

[0022] The end of the first limiting block cooperates with the driving assembly.

[0023] As a preferred embodiment of the portable needle-free syringe of the present invention, a guide ring is provided in the installation cavity, and the moving rod passes through the guide ring;

[0024] At least one sliding groove is provided on the guide ring;

[0025] The limiting assembly includes a second limiting block slidably disposed in the sliding groove, and a limiting member slidably disposed in the guide ring;

[0026] The moving rod is provided with a limiting groove, and the second limiting block can pass through the sliding groove and cooperate with the limiting groove.

[0027] As a preferred embodiment of the portable needle-free syringe of the present invention, the limiting member includes a top post slidably disposed in the guide ring, a sleeve slidably disposed at the end of the mounting cavity, and a fourth elastic member disposed between the sleeve and the top post;

[0028] The end of the sleeve is snugly sleeved in the guide ring, and a receiving groove is provided in the sleeve;

[0029] The accommodating groove cooperates with the second limiting block;

[0030] The contact parts of the limiting groove, the top column and the moving rod with the second limiting block are configured as arc surfaces or inclined surfaces.

[0031] As a preferred embodiment of the portable needle-free syringe of the present invention, the slide grooves are provided with at least three and are evenly spaced in the guide ring; the second limit block is made of magnetic metal;

[0032] The limiting member includes a sleeve slidably arranged in the installation cavity, and a third spring arranged between the sleeve and the guide ring;

[0033] The end of the sleeve is sleeved on the outside of the guide ring, and an escape space is provided between the two;

[0034] A magnetic ring is provided on the inner side of the sleeve, and the magnetic ring cooperates with the second limiting block;

[0035] The contact portion between the moving rod and the second limiting block is configured as a curved surface or an inclined surface.

[0036] As a preferred embodiment of the portable needle-free injector of the present invention, the trigger unit further comprises a locking assembly, the locking assembly comprising a third limit block disposed in the mounting cavity, and a fifth elastic member disposed between the mounting cavity and the third limit block;

[0037] The third limiting block is provided with a second avoidance groove;

[0038] The guide ring passes through the second avoidance groove, and the end of the third limit block cooperates with the driving assembly;

[0039] The third limiting block cooperates with the sleeve.

[0040] As a preferred solution of the portable needle-free syringe of the present invention, the needle tube and the mounting cavity are detachably connected; and the moving rod hits the piston rod when moving under the elastic force of the first elastic member.

[0041] The beneficial effects of the present invention are as follows: the driving component can control the moving rod to squeeze the first elastic part and then be restricted in movement by the limiting component, thereby achieving the effect of storing force; then, through the restriction of contacting the moving rod, the moving rod pops out under the elastic force of the first elastic part, and at the same time, the moving rod controls the movement of the piston rod to squeeze and spray out the liquid medicine in the syringe. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 Shows an overall schematic diagram of embodiment 1;

[0044] Figure 2 Another embodiment of the driving assembly of the first embodiment is shown;

[0045] Figure 3 A schematic diagram of a position limiting assembly according to the second embodiment is shown;

[0046] Figure 4 A diagram of the limiting assembly of the third embodiment is shown;

[0047] Figure 5 The working principle diagram of the limit assembly of the third embodiment is shown;

[0048] Figure 6 A diagram of a limiting component of a fourth embodiment is shown;

[0049] Figure 7 A schematic diagram of the locking assembly of the fifth embodiment is shown. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to specific embodiments and the accompanying drawings.

[0051] The terms used in the present invention are those commonly used in the art in view of the functions of the present invention, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as the meanings of the terms and the overall description of the present invention.

[0052] Example 1, with reference to Figure 1 and Figure 2 , which is a first embodiment of the present invention, provides a portable needle-free injector, which includes a mounting unit 100, a power storage unit 200, a trigger unit 300 and a needle unit 400;

[0053] The mounting unit 100 includes a mounting cavity S1.

[0054] The power storage unit 200 includes a moving rod 201 slidably arranged in the installation cavity S1, a first elastic member 202 arranged between the moving rod 201 and the installation cavity S1, and a driving assembly 203 arranged in the installation cavity S1 and cooperating with the moving rod 201, wherein the first elastic member 202 is made of a spring or a metal spring.

[0055] The mounting unit 100 includes a mounting tube 101, which includes an internal space S1-1 and a groove S1-2 provided on a side of the mounting tube 101 and communicating with the internal space S1-1; the groove S1-2 and the internal space S1-1 form a mounting cavity S1;

[0056] The moving rod 201 is installed in the internal space S1-1, and the driving component 203 is installed in the groove S1-2. One end of the driving component 203 is inserted into the internal space S1-1 to cooperate with the moving rod 201. A convex ring or a limiting column is provided inside the mounting tube 101. The moving rod 201 passes through the convex ring for limiting and guiding, or the limiting column is slidably inserted into the moving rod 201 for limiting and guiding.

[0057] Furthermore, the driving assembly 203 includes a long rod 203a movably arranged in the installation cavity S1, and a control part 203b arranged at the end of the long rod 203a; the control part 203b cooperates with the end of the moving rod 201, and the control part 203b can control the movement of the moving rod 201 and squeeze the first elastic member 202.

[0058] like Figure 2 As shown, the long rod 203a is slidably set in the groove S1-2, and the control part 203b is made of a limiting plate set at the end of the long rod 203a. There is an angle between the limiting plate and the long rod 203a, and the bottom of the limiting plate contacts the end of the moving rod 201. When the long rod 203a slides, the limiting plate can squeeze the moving rod 201 to drive the moving plate to move. The limiting plate can be formed by bending the long rod 203a, or it can be installed later. The other end of the long rod 203a can be installed with a handle or bent to form a handle, and the handle can be used to facilitate the control of the movement of the long rod 203a.

[0059] like Figure 1 As shown, the long rod 203a is rotatably set in the groove S1-2, and the end of the long rod 203a is rotatably connected to the groove S1-2 by a pin shaft. The control part 203b and the rotating part of the long rod 203a are located at the same end. The control part 203b is made of a limiting plate set at the end of the long rod 203a. There is an angle between the limiting plate and the long rod 203a. The bottom of the limiting plate contacts the end of the moving rod 201. When the long rod 203a rotates, it can pry the control part 203b at the end to rotate, thereby squeezing the moving rod 201 to move.

[0060] Furthermore, a step is provided at the end of the moving rod 201 , and the control portion 203 b can cooperate with the step portion at the end of the moving rod 201 without blocking the top surface of the moving rod 201 .

[0061] Furthermore, a second elastic member 203c is provided between the long rod 203a and the groove S1-2. When the long rod 203a is slidably connected to the groove S1-2, the second elastic member 203c is made of a spring, one end of which is connected to the end of the long rod 203a, and the other end is connected to the end wall of the groove S1-2. A step is provided on the long rod 203a, and the second elastic member 203c is located in the step to save the space between the long rod 203a and the groove S1-2.

[0062] When the long rod 203a is rotatably connected to the groove S1-2 via the pin, the second elastic member 203c is made of a torsion spring, which is sleeved on the pin and has two ends connected to the long rod 203a and the groove S1-2 respectively.

[0063] Among them, the trigger unit 300 includes a limiting component 301 that cooperates with the moving rod 201. The limiting component 301 is used to fix the moving rod 201. When the control part 203b squeezes the moving rod 201, it will compress the first elastic part 202. When the moving rod 201 moves through the limiting component 301, it will be restricted from movement by the limiting component 301. After the contact between the limiting component 301 and the moving rod 201, the moving rod 201 will be popped out under the elastic force of the first elastic part 202; the second elastic part 203c can automatically restore to its original state after the long rod 203a squeezes and accumulates force on the moving rod 201, thereby reducing the space occupied, and at the same time keeping the long rod 203a stable and not shaking after accumulating force.

[0064] The needle unit 400 includes a needle tube 401 connected to the mounting cavity S1, and a piston rod 402 slidably disposed within the needle tube 401. The piston rod 402 cooperates with the movable rod 201. When the piston rod 402 and the movable rod 201 are fixed, the movable rod 201 is squeezed and moved, which drives the piston rod 402 to move. By contacting the needle tube 401 with the liquid medicine, the liquid medicine can be aspirated. When the movable rod 201 is ejected, it drives the piston rod 402 to move, ejecting the liquid medicine in the needle tube 401.

[0065] When the piston rod 402 is not fixed to the moving rod 201, the needle tube 401 is detachably connected to the mounting cavity S1. The needle tube 401 is mounted on the mounting tube 101 by a thread or by a quick-release mechanism to realize the connection and disassembly between the needle tube 401 and the mounting tube 101. When the moving rod 201 pops out, it will collide with the piston rod 402, and then drive the piston rod 402 to move to spray the liquid medicine in the needle tube 401. The piston rod 402 can increase the spraying pressure of the liquid medicine in the needle tube 401 during the collision, thereby piercing the skin. The speed of the moving rod 201 decreases after the collision. At this time, driving the piston rod 402 to reduce the speed can slowly push out the liquid medicine in the needle tube 401 to achieve injection; at this time, multiple needle tubes 401 filled with liquid medicine can be prepared. When injecting, the moving rod 201 is first moved to contact the limit assembly 301 to accumulate force, and then the needle tube 401 is installed to release the moving rod 201 for injection. By replacing the needle tube 401, rapid replenishment of medicine can be achieved.

[0066] Furthermore, the limiting assembly 301 includes a first limiting block 301a arranged in the installation cavity S1, and a third elastic member 301b arranged between the installation cavity S1 and the first limiting block 301a; the limiting assembly 301 is located in the internal space S1-1, and the third elastic member 301b can be made of a spring or a metal spring.

[0067] A slot 201a is provided on the moving rod 201; the first limit block 301a cooperates with the slot 201a, and under the elastic force of the third elastic member 301b, the first limit block 301a is fitted with the moving rod 201. When the moving rod 201 is squeezed and moved by the controlled part 203b, the slot 201a moves with the moving rod 201. When the slot 201a moves and coincides with the first limit block 301a, the first limit block 301a will be inserted into the slot 201a to limit the moving rod 201. The other end of the first limit block 301a passes through the mounting tube 101. When releasing the first limit block 301a, you only need to pull out the first limit block 301a to separate it from the moving rod 201, thereby releasing the moving rod 201 for injection.

[0068] Example 2, reference Figure 3 , which is the second embodiment of the present invention. This embodiment is different from the first embodiment in that: a first avoidance groove 301c is provided on the first limiting block 301a;

[0069] The moving rod 201 passes through the first avoidance groove 301 c ; the end of the first limiting block 301 a cooperates with the driving assembly 203 .

[0070] Preferably, the driving assembly 203 uses a long rod 203a to be rotatably connected to the groove S1-2, and the top of the first limit block 301a passes through the internal space S1-1 and is located in the groove S1-2. At this time, the first limit block 301a cooperates with the card slot 201a through the bottom edge of the first avoidance groove 301c.

[0071] The long rod 203a is pressed against the top of the first limit block 301a under the action of the second elastic member 203c. When the long rod 203a is not affected by external forces, the first limit block 301a is inserted into the slot 201a without being squeezed and separated from the slot 201a.

[0072] In the initial state, the long rod 203a is retracted into the groove S1-2, and the first limit block 301a is retracted into the inner wall of the mounting tube 101 and does not pass through the groove S1-2. At this time, the bottom edge of the first avoidance groove 301c is against the moving rod 201.

[0073] During use, by bending the long rod 203a to leave the groove S1-2, the control unit 203b controls the moving rod 201 to move and compress the first elastic member 202. When the slot 201a moves and coincides with the first avoidance groove 301c, the first avoidance groove 301c is inserted into the slot 201a to limit the moving rod 201. At this time, the top of the first limit block 301a passes through the groove S1-2. After that, the long rod 203a is released. Under the action of the second elastic member 203c, the long rod 203a retracts into the groove S1-2 and contacts the first limit block 301a. At this time, the bottom edge of the first avoidance groove 301c will not be separated from the slot 201a.

[0074] When performing an injection, by holding the mounting tube 101 and pressing the long rod 203a hard, the first limit block 301a is squeezed and moved so that the bottom edge of the first avoidance groove 301c is separated from the card slot 201a, the limit on the moving rod 201 is released, and the moving rod 201 pops out under the elastic force of the first elastic member 202 and contacts the piston rod 402 to complete the injection.

[0075] The remaining structures are the same as those of Example 1.

[0076] Example 3, reference Figure 4 and Figure 5 , which is the third embodiment of the present invention. This embodiment differs from the second embodiment in that: a guide ring 102 is provided in the installation cavity S1, and the moving rod 201 passes through the guide ring 102; the guide ring 102 limits and guides the moving rod 201;

[0077] At least one slide groove 103 is provided on the guide ring 102;

[0078] The limiting assembly 301 includes a second limiting block 104 slidably disposed in the sliding groove 103 and a limiting member 301d slidably disposed in the guide ring 102;

[0079] A limiting groove 201b is provided on the moving rod 201, and the second limiting block 104 can pass through the slide groove 103 and cooperate with the limiting groove 201b. The second limiting block 104 can pass through the top and bottom ends of the slide groove 103, but cannot fall from the slide groove 103. The cross-section of the slide groove 103 is bracket-shaped, and the second limiting block 104 is spherical.

[0080] The limiting member 301d includes a top post 301d-1 slidably disposed in the guide ring 102, a sleeve 301d-2 slidably disposed at the end of the mounting cavity S1, and a fourth elastic member 301d-3 disposed between the sleeve 301d-2 and the top post 301d-1. The fourth elastic member 301d-3 is made of a spring or a metal spring.

[0081] The end of the sleeve 301d-2 fits snugly in the guide ring 102, and a receiving groove 301d-4 is provided in the sleeve 301d-2; when sliding, the sleeve 301d-2 can overlap with the slide groove 103, thereby blocking the top of the slide groove 103 and preventing the second limit block 104 from extending, so that the second limit block 104 can only extend downward into the inner side of the guide ring 102, and the receiving groove 301d-4 cooperates with the second limit block 104. When the sleeve 301d-2 is staggered with the slide groove 103, the second limit block 104 can extend into the receiving groove 301d-4.

[0082] The contact parts of the limiting groove 201b, the top column 301d-1 and the moving rod 201 with the second limiting block 104 are set as arc surfaces or inclined surfaces. When the second limiting block 104 is not blocked, the limiting groove 201b, the top column 301d-1 and the moving rod 201 are in contact with the second limiting block 104, which can push the second limiting block 104 up and out of the sliding groove 103 to be located in the accommodating groove 301d-4.

[0083] In the initial state, the top column 301d-1 is inserted into the guide ring 102, and the top column 301d-1 lifts the second limit block 104 and places it in the accommodating groove 301d-4. When the driving component 203 controls the extrusion moving rod 201 to move and contact the top column 301d-1, it pushes the top column 301d-1 to move outward. At this time, the second limit block 104 limits the movement of the sleeve 301d-2 in the accommodating groove 301d-4. At this time, the first elastic member 202 is stretched. When the moving rod 201 pushes the top column 301d-1 to move synchronously until the limit groove 201b coincides with the slide groove 103, At this time, the second limit block 104 will pass through the bottom of the slide groove 103 and enter the limit groove 201b under the squeezing of the accommodating groove 301d-4 to limit the moving rod 201. At the same time, the second limit block 104 releases the obstruction of the sleeve 301d-2. The sleeve 301d-2 slides under the action of the fourth elastic member 301d-3, so that the end of the sleeve 301d-2 moves to the top of the slide groove 103 to block the second limit block 104, thereby ensuring that the second limit block 104 will not separate from the limit groove 201b. At this time, the driving component 203 can be released to complete the force storage action of the moving rod 201.

[0084] During injection, it is only necessary to press the sleeve 301d-2. At this time, the sleeve 301d-2 will compress the fourth elastic member 301d-3. At the same time, the sleeve 301d-2 moves, and its end leaves the slide groove 103. The moving rod 201 will tend to pop out under the elastic force of the first elastic member 202. At this time, the limiting groove 201b squeezes the second limiting block 104, so that the second limiting block 104 moves into the accommodating groove 301d-4 to release the limit on the moving rod 201. The limiting rod can be smoothly popped out under the elastic force of the first elastic member 202 to complete the injection. When the moving rod 201 pops out, the fourth elastic member 301d-3 will control the top column 301d-1 to move to the bottom of the slide groove 103 to prevent the second limiting block 104 from falling. At this time, the whole is in the initial state, which is convenient for storing force on the moving rod 201 again.

[0085] The remaining structures are the same as those of Example 1.

[0086] Example 4, with reference to Figure 6 , which is the fourth embodiment of the present invention. This embodiment is different from the third embodiment in that: there are at least three slide grooves 103, which are evenly spaced in the guide ring 102; the second limit block 104 is made of magnetic metal; there are three slide grooves 103 and three second limit blocks 104, so that when the mounting tube 101 is horizontal, at least one second limit block 104 will fall to the bottom of the slide groove 103 under the action of gravity and enter the inside of the wire loop. The second limit block 104 is cylindrical, and the cross-section of the slide groove 103 is in the shape of a square bracket. A retaining ring is provided on the second limit block 104 to ensure that the second limit block 104 will not detach from the slide groove 103.

[0087] The limiting member 301d includes a sleeve 301d-2 slidably disposed in the mounting cavity S1, and a third spring 301d-5 disposed between the sleeve 301d-2 and the guide ring 102;

[0088] The end of the sleeve 301d-2 is sleeved on the outside of the guide ring 102, and an escape space 301d-6 is provided between the two. The escape space 301d-6 can ensure that the second limit block 104 can pass through the sliding groove 103.

[0089] A magnetic ring 301d-7 is provided on the inner side of the sleeve 301d-2, and the magnetic ring 301d-7 cooperates with the second limit block 104. When the magnetic ring 301d-7 moves to overlap with the slide groove 103, the magnetic ring 301d-7 can attract the second limit block 104 into the avoidance space 301d-6.

[0090] The contact portion between the moving rod 201 and the second limit block 104 is set as an arc surface or an inclined surface; when the end of the moving rod 201 moves and contacts the second limit block 104, it can push the second limit block 104 to make it disengage from the inside of the guide ring 102 without blocking the movement of the moving rod 201.

[0091] In the initial state, the magnetic ring 301d-7 is staggered from the slide groove 103, and the magnetic ring 301d-7 is close to the end of the installation cavity S1. While maintaining the horizontal state, the driving assembly 203 is controlled to squeeze the moving rod 201 to move. When the moving rod 201 moves and contacts the second limit block 104, it squeezes the second limit block 104, so that the second limit block 104 extends out of the guide ring 102, and the moving rod 201 continues to move. When the limit groove 201b coincides with the slide groove 103, the second limit block 104 falls into the limit groove 201b to clamp the moving rod 201, thereby completing the limitation of the moving rod 201. At this time, the limit rod completes the force storage.

[0092] During injection, it is only necessary to press the sleeve 301d-2. At this time, the sleeve 301d-2 will compress the third spring 301d-5, and the sleeve 301d-2 will move toward the inside of the installation cavity S1. At this time, the magnetic ring 301d-7 will move to the top of the slide groove 103 to magnetically pull the second limit block 104, so that the second limit block 104 moves away from the limit groove 201b to release the limit on the moving rod 201. The limit rod can be smoothly popped out under the elastic force of the first elastic member 202 to complete the injection. After that, the sleeve 301d-2 is released and returns to the initial state under the elastic force of the third spring 301d-5, which is convenient for accumulating power for injection again.

[0093] The remaining structures are the same as those of Example 1.

[0094] Example 5, reference Figure 7, which is the fifth embodiment of the present invention. This embodiment differs from the fourth and fifth embodiments in that: the trigger unit 300 further includes a locking assembly 302, which includes a third limiting block 302a disposed in the installation cavity S1, and a fifth elastic member 302b disposed between the installation cavity S1 and the third limiting block 302a. The fifth elastic member 302b is made of a spring or a metal spring.

[0095] A second avoidance groove 302c is provided on the third limit block 302a; the guide ring 102 passes through the second avoidance groove 302c, and the end of the third limit block 302a cooperates with the driving component 203; the third limit block 302a passes through the internal space S1-1 and is located in the groove S1-2. When the long rod 203a of the driving component 203 is rotated and set in the groove S1-2, the long rod 203a will be retracted into the groove S1-2 and will be against the third limit block 302a. Pressing the long rod 203a hard can squeeze and move the third limit block 302a.

[0096] The third limit block 302a cooperates with the sleeve 301d-2. When the sleeve 301d-2 is in the pop-up state, that is, the state before the moving rod 201 is about to be released, the third limit block 302a pops out and is flush with the sleeve 301d-2 under the elastic force of the fifth elastic member 302b. At this time, the sleeve 301d-2 is blocked by the third limit block 302a and cannot be pressed, thereby locking the sleeve 301d-2 to avoid accidental start-up caused by accidental touching of the sleeve 301d-2.

[0097] During injection, hold the mounting tube 101 with one hand, first hold the long rod 203a tightly so that the long rod 203a moves to squeeze the third limit block 302a. At this time, the third limit block 302a is staggered with the sleeve 301d-2. Then press the sleeve 301d-2 with your thumb, and the sleeve 301d-2 can move into the third avoidance groove. At the same time, after the sleeve 301d-2 moves, it contacts the limit of the moving rod 201, so that the moving rod 201 can be popped out to complete the injection.

[0098] When the sleeve 301d-2 moves into the third avoidance groove, it can prevent the third limit block 302a from popping out. At this time, the long rod 203a can be completely retracted into the groove S1-2 for easy storage. During the injection operation, the sleeve 301d-2 will pop out first. When the long rod 203a rotates to control the moving rod 201 to move and accumulate force, the third limit block 302a can pop out and be flush with the sleeve 301d-2 under the elastic force of the fifth elastic member 302b, which can prevent the sleeve 301d-2 from being pressed and moved.

[0099] The remaining structure is the same as that of Example 4 or 5.

[0100] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A portable needle-free syringe, characterized in that: include, The mounting unit (100) includes a mounting cavity (S1); A power storage unit (200) comprises a moving rod (201) slidably disposed in the installation cavity (S1), a first elastic member (202) disposed between the moving rod (201) and the installation cavity (S1), and a driving assembly (203) disposed in the installation cavity (S1) and cooperating with the moving rod (201); and A trigger unit (300) comprises a limiting assembly (301) cooperating with the moving rod (201), wherein the limiting assembly (301) is used to fix the moving rod (201); The needle unit (400) comprises a needle tube (401) in communication with the mounting cavity (S1), and a piston rod (402) slidably disposed in the needle tube (401); The piston rod (402) cooperates with the moving rod (201).

2. The portable needle-free injector according to claim 1, characterized in that: The mounting unit (100) comprises a mounting tube (101), and the mounting tube (101) comprises an internal space (S1-1) and a groove (S1-2) arranged on a side of the mounting tube (101) and communicating with the internal space (S1-1); The groove (S1-2) and the internal space (S1-1) form a mounting cavity (S1); The moving rod (201) is installed in the internal space (S1-1), and the driving assembly (203) is installed in the groove (S1-2).

3. The portable needle-free injector according to claim 1 or 2, characterized in that: The driving assembly (203) comprises a long rod (203a) movably arranged in the installation cavity (S1), and a control portion (203b) arranged at the end of the long rod (203a); The control portion (203b) is matched with the end of the moving rod (201), and the control portion (203b) can control the moving rod (201) to move and squeeze the first elastic member (202).

4. The portable needle-free injector according to claim 3, characterized in that: A second elastic member (203c) is installed between the long rod (203a) and the groove (S1-2).

5. The portable needle-free injector according to any one of claims 1, 2 or 4, characterized in that: The limiting assembly (301) comprises a first limiting block (301a) arranged in the installation cavity (S1), and a third elastic member (301b) arranged between the installation cavity (S1) and the first limiting block (301a); The movable rod (201) is provided with a slot (201a); The first limiting block (301a) cooperates with the clamping slot (201a).

6. The portable needle-free injector according to claim 5, characterized in that: The first limiting block (301a) is provided with a first avoidance groove (301c); The moving rod (201) passes through the first avoidance groove (301c); The end of the first limiting block (301a) cooperates with the driving assembly (203).

7. The portable needle-free injector according to any one of claims 1, 2 or 4, characterized in that: A guide ring (102) is provided in the installation cavity (S1), and the moving rod (201) passes through the guide ring (102); At least one sliding groove (103) is provided on the guide ring (102); The limiting assembly (301) comprises a second limiting block (104) slidably disposed in the sliding groove (103), and a limiting member (301d) slidably disposed in the guide ring (102); A limiting groove (201b) is provided on the moving rod (201), and the second limiting block (104) can pass through the sliding groove (103) and cooperate with the limiting groove (201b).

8. The portable needle-free injector according to claim 7, characterized in that: The limiting member (301d) comprises a top column (301d-1) slidably arranged in the guide ring (102), a sleeve (301d-2) slidably arranged at the end of the installation cavity (S1), and a fourth elastic member (301d-3) arranged between the sleeve (301d-2) and the top column (301d-1); The end of the sleeve (301d-2) is snugly sleeved in the guide ring (102), and a receiving groove (301d-4) is provided in the sleeve (301d-2); The accommodating groove (301d-4) cooperates with the second limiting block (104); The contact areas between the limiting groove (201b), the top column (301d-1), the moving rod (201) and the second limiting block (104) are configured as arc surfaces or inclined surfaces.

9. The portable needle-free injector according to claim 7, characterized in that: There are at least three sliding grooves (103) arranged at equal intervals in the guide ring (102); the second limiting block (104) is made of magnetic metal; The limiting member (301d) comprises a sleeve (301d-2) slidably arranged in the installation cavity (S1), and a third spring (301d-5) arranged between the sleeve (301d-2) and the guide ring (102); The end of the sleeve (301d-2) is sleeved on the outside of the guide ring (102), and an escape space (301d-6) is provided between the two; A magnetic ring (301d-7) is provided on the inner side of the sleeve (301d-2), and the magnetic ring (301d-7) cooperates with the second limiting block (104); The contact portion between the moving rod (201) and the second limiting block (104) is configured as a curved surface or an inclined surface.

10. The portable needle-free injector according to claim 8 or 9, characterized in that: The trigger unit (300) further comprises a locking assembly (302), wherein the locking assembly (302) comprises a third limiting block (302a) disposed in the installation cavity (S1), and a fifth elastic member (302b) disposed between the installation cavity (S1) and the third limiting block (302a); The third limiting block (302a) is provided with a second avoidance groove (302c); The guide ring (102) passes through the second avoidance groove (302c), and the end of the third limit block (302a) cooperates with the drive assembly (203); The third limiting block (302a) cooperates with the sleeve (301d-2).

11. The portable needle-free injector according to any one of claims 1, 2, 4, 6, 8, and 9, characterized in that: The needle tube (401) and the installation cavity (S1) are detachably connected; when the moving rod (201) moves under the elastic force of the first elastic member (202), it will collide with the piston rod (402).

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