A portable needleless injector

Abstract

The present application relates to the technical field of needleless injector, and particularly relates to a portable needleless injector, which comprises a mounting unit, a force storage unit and a trigger unit. The mounting unit comprises a mounting cavity. The force storage unit comprises a moving rod slidingly arranged in the mounting cavity, a first elastic member 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 trigger unit comprises a limiting assembly matched with the moving rod. The needle unit comprises a needle tube communicated with the mounting cavity and a piston rod slidingly arranged in the needle tube. The portable needleless injector can control the moving rod to extrude the first elastic member and then be limited by the limiting assembly to achieve the force storage effect. Then, the moving rod is extruded by the elastic force of the first elastic member, and the moving rod controls the piston rod to move to extrude and spray the liquid medicine in the needle tube.

Description

Technical Field

[0001] This invention relates to the technical field of needle-free injectors, and more particularly to a portable needle-free injector. Background Technology

[0002] Needle-free injectors mainly utilize the principle of pressure jet. The internal pressure device generates pressure, which pushes the liquid in the tube through micropores to form an extremely fine liquid column. This allows the liquid to penetrate the epidermis and reach the subcutaneous layer instantly. The liquid is then absorbed in a diffused manner with a diameter of 3-5 cm under the skin.

[0003] Existing needle-free injectors are relatively large in size, including components such as batteries, drive motors, and injection mechanisms. They are typically used in specific spaces, such as drug injection rooms or other rooms with necessary infrastructure to ensure timely replenishment of power and medication. These injectors are not portable and cannot be used for injections anytime, anywhere. Summary of the Invention

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

[0005] Therefore, the purpose of this invention is to provide a portable needle-free injector, which aims to provide a injector that can be used without a specific location, enabling injection operations anytime and anywhere.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a portable needle-free injector, comprising an installation unit including an installation cavity;

[0007] The power storage unit includes a movable rod slidably disposed in the mounting cavity, a first elastic member disposed between the movable rod and the mounting cavity, and a drive assembly disposed in the mounting cavity and cooperating with the movable rod; and,

[0008] The triggering unit includes a limiting component that cooperates with the moving rod, the limiting component being used to fix the moving rod;

[0009] The needle unit includes a needle tube communicating with the mounting cavity, and a piston rod slidably disposed in the needle tube;

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

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

[0012] The groove and the internal space form an installation cavity;

[0013] The movable rod is installed in the internal space, and the drive assembly is installed in the groove.

[0014] In a preferred embodiment of the portable needle-free injector of the present invention, the driving assembly includes a long rod movably disposed in the mounting cavity, and a control part disposed at the end of the long rod;

[0015] The control unit cooperates with the end of the moving rod, and the control unit can control the movement of the moving rod and compress the first elastic member.

[0016] In a preferred embodiment of the portable needle-free injector of the present invention, a second elastic element is installed between the long rod and the groove.

[0017] In a preferred embodiment of the portable needle-free injector of the present invention, the limiting component 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 cooperates with the slot.

[0020] As a preferred embodiment of the portable needle-free injector of the present invention, the first limiting block is provided with a first clearance groove;

[0021] The movable rod passes through the first clearance groove;

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

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

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

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

[0026] The movable 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 injector 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 fitted into the guide ring, and the sleeve is provided with a receiving groove;

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

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

[0031] In a preferred embodiment of the portable needle-free injector of the present invention, at least three grooves are provided and are equally spaced in the guide ring; the second limiting block is made of magnetic metal.

[0032] The limiting component includes a sleeve slidably disposed in the mounting cavity, and a third spring disposed between the sleeve and the guide ring;

[0033] The sleeve end is fitted onto the outside of the guide ring, and there is a clearance space between the two;

[0034] The inner side of the sleeve is provided with a magnetic ring, which cooperates with the second limiting block;

[0035] The contact area between the moving rod and the second limiting block is set as an arc surface or an inclined surface.

[0036] As a preferred embodiment of the portable needle-free injector of the present invention, the triggering unit further includes a locking component, the locking component including a third limiting block disposed in the mounting cavity, and a fifth elastic member disposed between the mounting cavity and the third limiting block;

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

[0038] The guide ring passes through the second clearance groove, and the end of the third limiting block cooperates with the drive assembly;

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

[0040] In a preferred embodiment of the portable needle-free injector of the present invention, the needle tube is detachably connected to the mounting cavity; the moving rod impacts the piston rod when it moves 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 element and then be restricted by the limiting component to achieve the effect of accumulating force. Then, by contacting the restriction of the moving rod, the moving rod pops out under the elastic force of the first elastic element. At the same time, the moving rod will control the piston rod to move and squeeze the liquid medicine in the syringe out. Attached Figure Description

[0042] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 An overall schematic diagram of Embodiment 1 is shown;

[0044] Figure 2 Another configuration of the drive component in Embodiment 1 is shown;

[0045] Figure 3 A schematic diagram of the limiting component in Embodiment 2 is shown;

[0046] Figure 4 A diagram of the limiting component in Embodiment 3 is shown;

[0047] Figure 5 A schematic diagram illustrating the working principle of the limiting component in Embodiment 3 is shown.

[0048] Figure 6 A diagram of the limiting component of Embodiment 4 is shown;

[0049] Figure 7 A schematic diagram of the locking component of Embodiment 5 is shown. Detailed Implementation

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

[0051] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0052] Example 1, referring to Figure 1 and Figure 2 The first embodiment of the present invention provides a portable needle-free injector, which includes an installation unit 100, a power storage unit 200, a triggering 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 movable rod 201 slidably disposed in the mounting cavity S1, a first elastic element 202 disposed between the movable rod 201 and the mounting cavity S1, and a drive assembly 203 disposed in the mounting cavity S1 and cooperating with the movable rod 201, wherein the first elastic element 202 is made of a spring or a metal sheet.

[0055] The mounting unit 100 includes a mounting tube 101, which includes an internal space S1-1 and a groove S1-2 disposed on the 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 movable rod 201 is installed in the internal space S1-1, and the drive assembly 203 is installed in the groove S1-2. One end of the drive assembly 203 is inserted into the internal space S1-1 and cooperates with the movable rod 201. The mounting tube 101 is provided with a convex ring or a limiting post inside. The movable rod 201 passes through the convex ring for limiting and guiding, or the limiting post is slidably inserted into the movable rod 201 for limiting and guiding.

[0057] Furthermore, the drive assembly 203 includes a long rod 203a movably disposed in the mounting cavity S1, and a control part 203b disposed 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 moving rod 201 to move and compress the first elastic member 202.

[0058] like Figure 2 As shown, the long rod 203a is slidably disposed in the groove S1-2. The control part 203b is made of a limiting plate disposed 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 is in contact with 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 by installing it later. A handle can be installed on the other end of the long rod 203a or bent to form a handle. The handle facilitates the control of the movement of the long rod 203a.

[0059] like Figure 1 As shown, the long rod 203a is rotatably disposed in the groove S1-2. The end of the long rod 203a is rotatably connected to the groove S1-2 by a pin. 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 disposed 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, the end of the moving rod 201 is provided with a step, and the control unit 203b can cooperate with the step portion at the end of the moving rod 201 without obstructing the top surface of the moving rod 201.

[0061] Furthermore, a second elastic element 203c is provided between the long rod 203a and the groove S1-2. When the long rod 203a and the groove S1-2 are slidably connected, the second elastic element 203c is made of a spring. One end of the spring 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 element 203c is located in the step to save the gap 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 a pin, the second elastic element 203c is made of a torsion spring, which is sleeved on the pin and its two ends are connected to the long rod 203a and the groove S1-2 respectively.

[0063] The triggering 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 unit 203b presses the moving rod 201, it will compress the first elastic element 202. When the moving rod 201 moves past the limiting component 301, its movement will be restricted by the limiting component 301. After the contact between the limiting component 301 and the moving rod 201, the moving rod 201 will be ejected under the elastic force of the first elastic element 202. The second elastic element 203c can automatically return to its original shape after the long rod 203a presses and stores force on the moving rod 201, reducing the space occupied. At the same time, it keeps the long rod 203a stable and does not shake after storing force.

[0064] The needle unit 400 includes a needle tube 401 communicating with the mounting cavity S1, and a piston rod 402 slidably disposed in the needle tube 401; wherein the piston rod 402 cooperates with the moving rod 201. When the piston rod 402 and the moving rod 201 are fixed, the moving rod 201 is squeezed and moved, which will drive the piston rod 402 to move. By contacting the needle tube 401 with the liquid medicine, the liquid medicine can be drawn. When the moving rod 201 pops out, it will drive the piston rod 402 to move and spray the liquid medicine in the needle tube 401 out.

[0065] When the piston rod 402 and the moving rod 201 are not fixed, the needle tube 401 is detachably connected to the mounting cavity S1. The needle tube 401 is installed on the mounting tube 101 by threads or by a quick-release mechanism, realizing the connection and disconnection 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 and spray the liquid medicine in the needle tube 401. When the piston rod 402 is impacted, it can increase the spray pressure of the liquid medicine in the needle tube 401, thus making it easier to puncture the skin. After the moving rod 201 is impacted, its speed decreases. At this time, driving the piston rod 402 to decrease its 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. During injection, the moving rod 201 is moved to contact the limiting component 301 to store force. Then the needle tube 401 is installed and the moving rod 201 is released to inject. The medication can be quickly replenished by changing the needle tube 401.

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

[0067] The movable rod 201 is provided with a slot 201a; the first limiting block 301a cooperates with the slot 201a. Under the elastic force of the third elastic element 301b, the first limiting block 301a is in contact with the movable rod 201. When the movable rod 201 is squeezed and moved by the control part 203b, the slot 201a moves with the movable rod 201. When the slot 201a moves and coincides with the first limiting block 301a, the first limiting block 301a will be inserted into the slot 201a to limit the movable rod 201. The other end of the first limiting block 301a extends out of the mounting tube 101. When releasing the first limiting block 301a, it is only necessary to pull the first limiting block 301a outward to separate it from the movable rod 201, thereby releasing the movable rod 201 for injection.

[0068] Example 2, refer to Figure 3 This is the second embodiment of the present invention, which differs from the first embodiment in that: the first limiting block 301a is provided with a first clearance groove 301c;

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

[0070] Preferably, the drive assembly 203 is rotatably connected to the groove S1-2 via a long rod 203a. The top of the first limiting block 301a protrudes from the internal space S1-1 and is located in the groove S1-2. At this time, the first limiting block 301a cooperates with the slot 201a through the bottom edge of the first clearance groove 301c.

[0071] Under the action of the second elastic element 203c, the long rod 203a abuts against the top of the first limiting block 301a. When the long rod 203a is not subjected to external force, the first limiting block 301a will not be squeezed and separated from the slot 201a when inserted into the slot 201a.

[0072] In the initial state, the long rod 203a is retracted in the groove S1-2, and the first limiting block 301a is retracted in the inner wall of the mounting tube 101 and does not protrude from the groove S1-2. At this time, the bottom edge of the first clearance groove 301c abuts against the moving rod 201.

[0073] In use, by bending the long rod 203a away from the groove S1-2, the control unit 203b controls the moving rod 201 to move and compress the first elastic element 202. When the slot 201a moves and coincides with the first clearance slot 301c, the first clearance slot 301c is inserted into the slot 201a to limit the moving rod 201. At this time, the top of the first limiting block 301a protrudes from the groove S1-2. Then, the long rod 203a is released. Under the action of the second elastic element 203c, the long rod 203a retracts into the groove S1-2 and abuts against the first limiting block 301a. At this time, the bottom edge of the first clearance slot 301c will not separate from the slot 201a.

[0074] When injection is performed, by holding the installation tube 101 and pressing the long rod 203a, the first limiting block 301a is squeezed and moved, causing the bottom edge of the first clearance groove 301c to separate from the slot 201a, releasing the limitation on the moving rod 201. The moving rod 201 is then ejected under the elastic force of the first elastic element 202 and contacts the piston rod 402 to complete the injection.

[0075] The remaining structure is the same as that in Example 1.

[0076] Example 3, referring to Figure 4 and Figure 5 This is the third embodiment of the present invention, which differs from the second embodiment in that: a guide ring 102 is provided in the mounting 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 groove 103 is provided on the guide ring 102;

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

[0079] The moving rod 201 is provided with a limiting groove 201b. 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 of the slide groove 103, but cannot fall out of 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 sheet.

[0081] The end of the sleeve 301d-2 is fitted into the guide ring 102. The sleeve 301d-2 is provided with a receiving groove 301d-4. When the sleeve 301d-2 slides, it can overlap with the slide groove 103, thereby blocking the top of the slide groove 103 and preventing the second limiting block 104 from extending out. This allows the second limiting block 104 to only extend downward into the inner side of the guide ring 102. The receiving groove 301d-4 cooperates with the second limiting block 104. When the sleeve 301d-2 is misaligned with the slide groove 103, the second limiting block 104 can extend into the receiving groove 301d-4.

[0082] The contact areas between the limiting groove 201b, the top post 301d-1, and the moving rod 201 and 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 post 301d-1, and the moving rod 201 can push the second limiting block 104 out of the slide groove 103 and into the receiving groove 301d-4 when they contact the second limiting block 104.

[0083] In the initial state, the top post 301d-1 is inserted into the guide ring 102, and the top post 301d-1 lifts the second limiting block 104 into the receiving groove 301d-4. When the drive assembly 203 controls the pressing moving rod 201 to move and contact the top post 301d-1, it will push the top post 301d-1 to move outward. At this time, the second limiting block 104 limits the movement of the sleeve 301d-2 in the receiving groove 301d-4. At this time, the first elastic element 202 is stretched. When the moving rod 201 pushes the top post 301d-1 to move synchronously until the limiting groove 201b coincides with the sliding groove 103, At this time, the second limiting block 104, under the pressure of the receiving groove 301d-4, will pass through the lower part of the slide groove 103 and enter the limiting groove 201b to limit the moving rod 201. At the same time, the second limiting block 104 releases its obstruction to the sleeve 301d-2. The sleeve 301d-2 slides under the action of the fourth elastic element 301d-3, so that the end of the sleeve 301d-2 moves to the upper part of the slide groove 103 to block the second limiting block 104, thereby ensuring that the second limiting block 104 will not disengage from the limiting groove 201b. At this time, the drive assembly 203 can be released to complete the power storage action of the moving rod 201.

[0084] During injection, simply press the sleeve 301d-2. At this time, the sleeve 301d-2 will compress the fourth elastic element 301d-3. Simultaneously, 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 element 202. At this time, the limiting groove 201b squeezes the second limiting block 104, causing the second limiting block 104 to move into the receiving groove 301d-4 to release the limitation on the moving rod 201. The limiting rod can smoothly pop out under the elastic force of the first elastic element 202 to complete the injection. When the moving rod 201 pops out, the fourth elastic element 301d-3 will control the top column 301d-1 to move below the slide groove 103 to block the second limiting block 104 from falling. At this time, the whole is in the initial state, which is convenient for the moving rod 201 to be charged again.

[0085] The remaining structure is the same as that in Example 1.

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

[0087] The limiting member 301d includes a sleeve 301d-2 that is 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 a clearance space 301d-6 is provided between the two; the clearance space 301d-6 can ensure that the second limiting block 104 can pass through the slide groove 103;

[0089] The inner side of the sleeve 301d-2 is provided with a magnetic ring 301d-7. The magnetic ring 301d-7 cooperates with the second limiting block 104. When the magnetic ring 301d-7 moves and coincides with the slide groove 103, the magnetic ring 301d-7 can attract the second limiting block 104 into the clearance space 301d-6.

[0090] The contact area between the moving rod 201 and the second limiting 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 limiting block 104, it can push the second limiting block 104 to disengage it from the inside of the guide ring 102 without obstructing the movement of the moving rod 201.

[0091] In the initial state, the magnetic ring 301d-7 is offset from the slide groove 103, and the magnetic ring 301d-7 is close to the end of the mounting cavity S1. While maintaining a horizontal state, the drive assembly 203 is controlled to press the moving rod 201 to move. When the moving rod 201 moves and contacts the second limiting block 104, it will press the second limiting block 104, causing the second limiting block 104 to extend out of the guide ring 102. The moving rod 201 continues to move. When the limiting groove 201b coincides with the slide groove 103, the second limiting block 104 will fall into the limiting groove 201b and lock the moving rod 201, thereby completing the limitation of the moving rod 201. At this time, the limiting rod completes the storage of force.

[0092] During injection, simply 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 towards the interior of the mounting cavity S1. At this time, the magnetic ring 301d-7 will move above the slide groove 103 and magnetically pull the second limiting block 104, causing the second limiting block 104 to move away from the limiting groove 201b and release the limitation on the moving rod 201. The limiting rod can then be smoothly ejected under the elastic force of the first elastic element 202 to complete the injection. Afterwards, release the sleeve 301d-2 and it will return to its initial state under the elastic force of the third spring 301d-5, making it easy to perform charged injection again.

[0093] The remaining structure is the same as that in Example 1.

[0094] Example 5, refer to Figure 7This is the fifth embodiment of the present invention. The difference between this embodiment and the fourth and fifth embodiments is that the triggering unit 300 further includes a locking component 302. The locking component 302 includes a third limiting block 302a disposed in the mounting cavity S1, and a fifth elastic member 302b disposed between the mounting cavity S1 and the third limiting block 302a. The fifth elastic member 302b is made of a spring or a metal sheet.

[0095] The third limiting block 302a is provided with a second clearance groove 302c; the guide ring 102 passes through the second clearance groove 302c, and the end of the third limiting block 302a cooperates with the drive assembly 203; the third limiting block 302a protrudes from the internal space S1-1 and is located in the groove S1-2. When the long rod 203a of the drive assembly 203 is rotated and set in the groove S1-2, the long rod 203a will abut against the third limiting block 302a when it retracts into the groove S1-2. Pressing the long rod 203a can squeeze and move the third limiting block 302a.

[0096] The third limiting block 302a cooperates with the sleeve 301d-2. When the sleeve 301d-2 is in the pop-out state, that is, in the state before the release of the moving rod 201, the third limiting block 302a pops out under the elastic force of the fifth elastic element 302b and is flush with the sleeve 301d-2. At this time, the sleeve 301d-2 is blocked by the third limiting block 302a and cannot be pressed, thus playing a role in locking the sleeve 301d-2 and preventing the sleeve 301d-2 from being accidentally touched and causing accidental start.

[0097] During injection, hold the installation tube 101 with one hand. First, grip the long rod 203a tightly so that the long rod 203a moves and squeezes the third limiting block 302a to move. At this time, the third limiting block 302a is misaligned with the sleeve 301d-2. Then, press the sleeve 301d-2 with your thumb. The sleeve 301d-2 can move into the third clearance groove. At the same time, after the sleeve 301d-2 moves, it contacts and limits the moving rod 201, which can realize the pop-out of the moving rod 201 to complete the injection.

[0098] When the sleeve 301d-2 moves into the third clearance groove, it can prevent the third limiting block 302a from popping out. At this time, the long rod 203a can be completely retracted in 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 store force, the third limiting block 302a can pop out under the elastic force of the fifth elastic element 302b and be flush with the sleeve 301d-2, which can prevent the sleeve 301d-2 from being pressed and moved.

[0099] The remaining structures are the same as those in Examples 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 it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A portable needle-free injector, characterized in that: include, The mounting unit (100) includes a mounting cavity (S1); The power storage unit (200) includes a movable rod (201) slidably disposed in the mounting cavity (S1), a first elastic member (202) disposed between the movable rod (201) and the mounting cavity (S1), and a drive assembly (203) disposed in the mounting cavity (S1) and cooperating with the movable rod (201); and, The triggering unit (300) includes a limiting component (301) that cooperates with the moving rod (201), the limiting component (301) being used to fix the moving rod (201); The needle unit (400) includes a needle tube (401) communicating 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); The drive assembly (203) includes a long rod (203a) movably disposed in the mounting cavity (S1) and a control part (203b) disposed at the end of the long rod (203a). The control unit (203b) cooperates with the end of the moving rod (201), and the control unit (203b) can control the moving rod (201) to move and squeeze the first elastic member (202). A second elastic element (203c) is installed between the long rod (203a) and the groove (S1-2). The mounting cavity (S1) is provided with a guide ring (102), and the moving rod (201) passes through the guide ring (102); the guide ring (102) is provided with at least one groove (103); the limiting component (301) includes a second limiting block (104) slidably disposed in the groove (103), and a limiting member (301d) slidably disposed in the guide ring (102); the moving rod (201) is provided with a limiting groove (201b), and the second limiting block (104) can pass through the groove (103) and cooperate with the limiting groove (201b); At least three grooves (103) are provided and are equally spaced in the guide ring (102); the second limiting block (104) is made of magnetic metal; 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). The end of the sleeve (301d-2) is sleeved on the outside of the guide ring (102), and there is a clearance space (301d-6) between the two. The sleeve (301d-2) is provided with a magnetic ring (301d-7) on the inner side, and the magnetic ring (301d-7) cooperates with the second limiting block (104); The contact area between the moving rod (201) and the second limiting block (104) is set as an arc surface or an inclined surface.

2. The portable needle-free injector according to claim 1, characterized in that: The mounting unit (100) includes a mounting tube (101), the mounting tube (101) includes an internal space (S1-1) and a groove (S1-2) disposed on the 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 an installation cavity (S1). The movable rod (201) is installed in the internal space (S1-1), and the drive assembly (203) is installed in the groove (S1-2).

3. The portable needle-free injector according to claim 2, characterized in that: The triggering unit (300) further includes a locking component (302), which includes a third limiting block (302a) disposed in the mounting cavity (S1) and a fifth elastic member (302b) disposed between the mounting cavity (S1) and the third limiting block (302a). The third limiting block (302a) is provided with a second clearance groove (302c); The guide ring (102) passes through the second clearance groove (302c), and the end of the third limiting block (302a) cooperates with the drive assembly (203); The third limiting block (302a) cooperates with the sleeve (301d-2).

4. The portable needle-free injector according to claim 3, characterized in that: The needle tube (401) is detachably connected to the mounting cavity (S1); the moving rod (201) will strike the piston rod (402) when it moves under the elastic force of the first elastic member (202).

5. A portable needle-free injector, characterized in that: include, The mounting unit (100) includes a mounting cavity (S1); The power storage unit (200) includes a movable rod (201) slidably disposed in the mounting cavity (S1), a first elastic member (202) disposed between the movable rod (201) and the mounting cavity (S1), and a drive assembly (203) disposed in the mounting cavity (S1) and cooperating with the movable rod (201); and, The triggering unit (300) includes a limiting component (301) that cooperates with the moving rod (201), the limiting component (301) being used to fix the moving rod (201); The needle unit (400) includes a needle tube (401) communicating 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); The drive assembly (203) includes a long rod (203a) movably disposed in the mounting cavity (S1) and a control part (203b) disposed at the end of the long rod (203a). The control unit (203b) cooperates with the end of the moving rod (201), and the control unit (203b) can control the moving rod (201) to move and squeeze the first elastic member (202). A second elastic element (203c) is installed between the long rod (203a) and the groove (S1-2). The mounting cavity (S1) is provided with a guide ring (102), and the moving rod (201) passes through the guide ring (102); the guide ring (102) is provided with at least one groove (103); the limiting component (301) includes a second limiting block (104) slidably disposed in the groove (103), and a limiting member (301d) slidably disposed in the guide ring (102); the moving rod (201) is provided with a limiting groove (201b), and the second limiting block (104) can pass through the groove (103) and cooperate with the limiting groove (201b); 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 end of the sleeve (301d-2) is fitted into the guide ring (102), and the sleeve (301d-2) is provided with a receiving groove (301d-4). The receiving groove (301d-4) cooperates with the second limiting block (104); The contact area between the moving rod (201) and the second limiting block (104) is set as an arc surface or an inclined surface.

6. The portable needle-free injector according to claim 5, characterized in that: The triggering unit (300) further includes a locking assembly (302), which includes a third limiting block (302a) disposed in the mounting cavity (S1) and a fifth elastic member (302b) disposed between the mounting cavity (S1) and the third limiting block (302a). The third limiting block (302a) is provided with a second clearance groove (302c); The guide ring (102) passes through the second clearance groove (302c), and the end of the third limiting block (302a) cooperates with the drive assembly (203); The third limiting block (302a) cooperates with the sleeve (301d-2).

7. The portable needle-free injector according to claim 6, characterized in that: The needle (401) is detachably connected to the mounting cavity (S1); the moving rod (201) will strike the piston rod (402) when it moves under the elastic force of the first elastic element (202).

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