injector

Abstract

The present application relates to a kind of ejector, ejector includes: container;Ejection mechanism, including infusion component;Actuating mechanism, including holding piece and actuating piece;First locking mechanism, when the use number of ejector does not reach preset value and infusion component completes liquid suction, first locking mechanism locks actuating piece;Second locking mechanism, located the side of container towards holding piece, when the use number of ejector reaches preset value and infusion component completes liquid suction, second locking mechanism locks actuating piece;In two kinds of locking mode, holding piece can be driven infusion component to move along second direction under external force to trigger ejection.In the ejector of the present application, two sets of locking mechanism, first locking mechanism and second locking mechanism are arranged, two kinds of locking mode are executed respectively, second locking mechanism is used to lock ejector in complete liquid suction state when the use number of ejector reaches preset value, ejector can complete the last use in the limited use number of container, locking security is high, and second locking mechanism is not easy to forcibly unlock by other tools.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a jet injector. Background Technology

[0002] Sprayers typically include a counting component and a locking component. When the number of uses of the sprayer reaches a preset value, the locking component locks the sprayer to prevent the operator from continuing to use it.

[0003] CN111821546B discloses a sprayer including a counting indicator and a locking device for locking the container when the number of uses of the sprayer reaches a preset value. The locking device includes a locking component and a locking spring. After the outer casing is removed, the locking device can lock the inner component and the upper outer casing. By preventing the inner component from rotating through the non-rotating upper outer casing, the user can be prevented from continuing to use the sprayer by directly rotating the inner component. Furthermore, the locking component locks during the stretching process of the sprayer to prevent further stretching of the sprayer, i.e., to prevent the sprayer's delivery tube from further drawing liquid. After the outer casing is installed, an actuator on the outer casing can push the locking component back to the unlocked position to unlock it. In this design, the locking component is located on one side of the container. After removing the lower outer casing, the user can easily unlock the locking component with any cylindrical structure and continue to use the sprayer, leading to inaccurate drug delivery. Summary of the Invention

[0004] Based on the aforementioned deficiencies in the prior art, the purpose of this invention is to provide an injector with two sets of locking mechanisms, namely a first locking mechanism and a second locking mechanism, which respectively execute two locking modes. The second locking mechanism is used to lock the injector in a fully liquid-absorbing state when the number of uses of the injector reaches a preset value. The injector can complete the current spraying while the second locking mechanism is locked, thereby improving the utilization rate of liquid in the container. Furthermore, the locking is highly secure and it is not easy to forcibly unlock the second locking mechanism using other tools.

[0005] Therefore, the present invention provides the following technical solution.

[0006] This invention provides an injector, the injector comprising:

[0007] A container used to hold liquids;

[0008] A spraying mechanism, which includes an infusion component;

[0009] An actuation mechanism includes a retainer and an actuator, the retainer being used to hold the infusion component and being movably connected to the actuator; when the actuator rotates, the retainer drives the infusion component to move in a first direction so that the infusion component draws liquid from the container;

[0010] The first locking mechanism locks the actuator when the number of uses of the injector has not reached a preset value and the infusion component has completed aspiration, so as to execute the first locking mode.

[0011] The second locking mechanism is located on the side of the container facing the retainer. When the number of uses of the injector reaches a preset value and the infusion component completes aspiration, the second locking mechanism locks the actuator to execute the second locking mode.

[0012] In both locking modes, the retainer can be moved along a second direction by external force to trigger a jet; the first direction and the second direction are opposite.

[0013] Optionally, the new container is configured to unlock the second locking mechanism, and the old container is configured not to unlock the second locking mechanism.

[0014] Optionally, the injector further includes a trigger for triggering the retainer to move in a second direction and unlock the first locking mechanism, but not the second locking mechanism.

[0015] Optionally, the first locking mechanism includes a first locking component and a first elastic element, wherein the first locking component includes a first abutting portion;

[0016] When the injector is in the initial state, under the elastic force of the first elastic member, the first abutting portion abuts against the retaining member along the first direction;

[0017] When the retainer moves along the first direction, the first locking member moves along the first direction under the elastic force of the first elastic member;

[0018] When the infusion component completes the aspiration, the first locking component moves to the first locking position and locks the actuator.

[0019] When the retainer moves in the second direction, the retainer can push the first abutment to release the first locking member.

[0020] Optionally, the second locking mechanism includes a second locking component and a second elastic element, and the injector includes a blocking structure;

[0021] When the number of uses does not reach the preset value, under the elastic force of the second elastic element, the second locking component abuts against the blocking structure in the first direction;

[0022] When the number of uses reaches a preset value, the blocking structure yields, and under the elastic force of the second elastic member, the second locking member moves along the first direction to the second locking position to lock the actuator.

[0023] Optionally, when the second locking mechanism executes the second locking mode, pressing the trigger can cause the retaining member to move the infusion component along the second direction, triggering the injection.

[0024] The projections of the second locking component and the retaining component in the second direction do not overlap; the retaining component does not contact the second locking component during its movement in the second direction, and the movement of the retaining component cannot release the locking of the second locking mechanism.

[0025] Optionally, the injector further includes a counting disc having a first ratchet structure and a notch, and the second locking component having a second ratchet structure;

[0026] When the number of uses does not reach the preset value, under the elastic force of the second elastic element, the second ratchet structure engages with the first ratchet structure, wherein the first ratchet structure forms the blocking structure;

[0027] When the number of uses reaches a preset value, the counting disk rotates until the notch is opposite to the second ratchet structure in the first direction, and the notch is used to allow the second locking component to move to the second locking position.

[0028] Optionally, the injector further includes a balancing mechanism, which includes a balancing element and a third elastic element, the balancing element being provided with a third ratchet structure;

[0029] Under the elastic force of the third elastic element, the third ratchet structure engages with the first ratchet structure; wherein the dimension of the third ratchet structure in the circumferential direction of the counting disk is greater than the width of the notch.

[0030] Optionally, the counting disk is sleeved on the outer periphery of the actuator, and the second locking mechanism and the balancing mechanism are respectively distributed on both radial sides of the actuator.

[0031] Optionally, the actuator is provided with a first locking groove and a second locking groove, the first locking groove and the second locking groove being spaced apart along the circumferential direction of the actuator;

[0032] The first locking mechanism includes a first locking component, which engages with the first locking groove along a first direction to execute the first locking mode;

[0033] The second locking component engages with the second locking slot along the first direction to perform the second locking mode.

[0034] Optionally, the actuator has a protruding structure, and the protruding structure and the second locking groove are distributed sequentially along the rotation direction of the actuator;

[0035] When the second locking mechanism is unlocked, during the process of rotating the actuator again, the protruding structure is used to push up the second locking component so that the counting disk can rotate smoothly to re-engage with the first ratchet structure.

[0036] Optionally, the injector further includes a first housing, the actuator being rotatably connected to the first housing, and the second locking mechanism being isolated within the first housing by the actuator.

[0037] Optionally, the injector further includes an unlocking auxiliary mechanism, which includes a first pusher;

[0038] When the second locking mechanism locks the actuator, if the container is replaced, the new container is configured to push the first pusher to move in the second direction to the unlock position, and the first pusher pushes the second locking component away from the second locking position to achieve unlocking; if the old container is installed, the old container is configured not to push the first pusher to move to the unlock position.

[0039] Optionally, the unlocking assistance mechanism further includes a second pusher;

[0040] When a new container is replaced, the new container is configured to push the second pusher in a second direction, such that the second pusher pushes the first pusher to the unlock position.

[0041] Optionally, the container includes a container body and a first auxiliary component, the first auxiliary component being movably connected to the container body;

[0042] When the container is not in use, the first auxiliary component is in the first position;

[0043] When a new container is loaded, the second pusher abuts against the first auxiliary member along the first direction;

[0044] During the first spraying process after the new container is loaded, the first auxiliary component moves to the second position under the pressure of the second pusher along the first direction, so that the container becomes the old container.

[0045] Optionally, the container body includes a lid and a body, with the lid mounted on the body;

[0046] The cover has an opening at least on one side facing the retainer, and the cover has a first mounting portion and a cavity distributed sequentially along a first direction;

[0047] When the first auxiliary component is in the first position, the first auxiliary component is detachably connected to the first mounting portion;

[0048] When the first auxiliary component is in the second position, the first auxiliary component is located inside the cavity.

[0049] Optionally, the cover is fitted onto one end of the body, and the cavity is formed between the first mounting part and the end of the body.

[0050] Optionally, the injector further includes a guide;

[0051] When the actuator rotates, the guide is used to guide the retainer to move along the first direction;

[0052] When the retainer moves along the first direction to the fully aspirated position, the guide is used to prevent the retainer from moving along the second direction.

[0053] Optionally, the retainer has cavities and a second mounting portion distributed sequentially along the first direction, and the container is detachably connected to the second mounting portion;

[0054] The unlocking assistance mechanism further includes a second auxiliary component, which is movably connected to the retaining component, and a second pusher is movably connected to the second auxiliary component, the second auxiliary component being partially located within the cavity.

[0055] Optionally, the unlocking auxiliary mechanism further includes a fourth elastic element, which is connected to the second auxiliary element and the second pusher respectively;

[0056] When the old container is removed, one end of the guide extends into the cavity and abuts against the second auxiliary component in the first direction;

[0057] When a new container is loaded, the first auxiliary member pushes the second pusher in the second direction to unlock the second locking mechanism, and the fourth elastic member is compressed;

[0058] During the first triggering of liquid aspiration after the new container is inserted, the fourth elastic element rebounds, causing the second auxiliary element to move relative to the second pusher in the second direction;

[0059] During the first trigger spray after the new container is loaded, the second auxiliary component moves to abut against the guide component, the retaining component drives the container body to continue moving along the first direction, and the first auxiliary component moves to the second position along the second direction under the pressure of the second pusher.

[0060] Optionally, the second auxiliary member includes a connected first main body portion and a plurality of first extending ribs; the retainer is provided with a first through hole, the first main body portion is located in the cavity, and the first extending ribs pass through the first through hole;

[0061] The second pusher is located on the side of the retainer facing the container. The second pusher includes a connected second main body and a plurality of second extension ribs. The second extension ribs are movably connected to the first extension ribs. The second main body is used to abut against the first auxiliary member.

[0062] Optionally, at least one of the second extension ribs is provided with a pushing portion, which is positioned opposite to the first pusher in a second direction, and the pushing portion is used to push the first pusher to the unlock position.

[0063] Optionally, the outer wall of the retainer is provided with a groove extending along the second direction, and the first pusher is provided with a pushed portion, the push portion and the pushed portion being arranged sequentially in the groove along the second direction.

[0064] Optionally, the first extending rib is provided with a fastening part, and the second extending rib has a bent structure and is provided with a connected second through hole and a fastening surface, and the first extending rib extends into the second through hole;

[0065] When the old container is removed, the first main body abuts against the cavity wall of the recess under the pressure of the guide, and the fastening part fastens to the fastening surface;

[0066] When a new container is loaded, under the pressure of the first auxiliary component, the second pusher moves in the second direction and the fastening surface disengages from the fastening part;

[0067] During the first liquid aspiration process after the new container is inserted, under the rebound force of the fourth elastic element, the second auxiliary element moves along the second direction to the fastening part and re-fastens to the fastening surface.

[0068] Optionally, the second auxiliary member further includes a plurality of first abutting ribs, each abutting rib having a first protrusion; the retaining member has a plurality of third through holes, each third through hole having a second protrusion, the first abutting ribs extending into the third through holes one by one and their outer walls abutting against the second protrusions; the second pusher includes a plurality of second abutting ribs, the second abutting ribs and the first abutting ribs being arranged one by one.

[0069] When the old container is removed, the projection of the second abutment rib in the second direction falls entirely on the first main body.

[0070] During the first triggering of liquid aspiration after the new container is loaded, the second auxiliary component moves along the second direction until the first protrusion is pressed inward by the second protrusion, so that the first abutting rib deforms inward, thereby making the projection of the first abutting rib and the corresponding second abutting rib in the first direction at least partially overlap.

[0071] During the first trigger spray after the new container is loaded, the first abutment rib pushes the second abutment rib to move along the first direction, so that the second pusher pushes the first auxiliary member to the second position.

[0072] Optionally, the retainer is provided with a third mounting portion, and the infusion component is connected to the third mounting portion; the outer wall of the third mounting portion forms one side wall of the third through hole, and the outer wall of the third mounting portion is provided with a plurality of outwardly protruding inclined surfaces, the outwardly protruding inclined surfaces are inclined outward along the second direction, and the outwardly protruding inclined surfaces are provided in a one-to-one correspondence with the second abutment rib;

[0073] During the process of loading a new container, the second pusher moves along the second direction, and the second abutting rib is deformed by being squeezed outward by the correspondingly provided outward convex inclined surface.

[0074] Optionally, the first main body has a plurality of recesses on the side opposite to the first abutment rib, and the recesses are matched one by one with the first abutment rib.

[0075] Optionally, the first main body has a plurality of protrusions on one side of the surface facing the guide, and the protrusions are respectively disposed on the outer side of the recess;

[0076] When the protrusion is compressed along the first direction, the protrusion engages with the recess to increase the inward deformation of the first abutment rib.

[0077] Optionally, the first abutting rib is provided with a first abutting slope at one end facing the second pusher, and the second abutting rib is provided with a second abutting slope at one end facing the second auxiliary member, and the first abutting slope is inclined from the outside to the inside along a first direction;

[0078] During the process of the first abutting rib pushing the second abutting rib to move along the first direction, the first abutting inclined surface and the second abutting inclined surface abut against each other.

[0079] Optionally, the third through hole is provided with a first reset guide rib and a second reset guide rib;

[0080] During the first triggering of the spray after the new container is loaded, the first reset guide rib is used to guide the first abutment rib to restore its outward deformation, and the second reset guide rib is used to guide the second abutment rib to restore its inward deformation.

[0081] The present invention has the following technical effects:

[0082] This invention provides a sprayer with two locking mechanisms: a first locking mechanism and a second locking mechanism. The first locking mechanism locks the sprayer in a fully liquid-absorbed state during normal use to prevent accidental spraying by the user rotating the actuator. The second locking mechanism locks the sprayer in a fully liquid-absorbed state after a preset number of uses. Both the first and second locking mechanisms lock the actuator but not the retaining member. The retaining member can move the infusion component along a second direction under external force to complete the spraying, thus improving the utilization rate of liquid in the container. Furthermore, the second locking mechanism is located on the side of the container facing the retaining member, preventing the user from forcibly unlocking the second locking mechanism with other tools, ensuring the security of the lock and preventing the user from continuing to use old containers. Attached Figure Description

[0083] Figure 1 This is a cross-sectional view of the injector during its first liquid intake after being loaded into a new container, according to the present invention. Figure 1 ;

[0084] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0085] Figure 3 This is a cross-sectional view of the injector during its first liquid intake after being loaded into a new container, according to the present invention. Figure 2 ;

[0086] Figure 4 This is a partial structural diagram of the injector of the present invention. Figure 1 ;

[0087] Figure 5 This is an exploded view of a partial structure of the injector of the present invention. Figure 1 ;

[0088] Figure 6 for Figure 5 Enlarged view at point B in the middle;

[0089] Figure 7 This is a partial structural diagram of the injector of the present invention. Figure 2 ;

[0090] Figure 8 This is an exploded view of a partial structure of the injector of the present invention. Figure 2 ;

[0091] Figure 9 This is a three-dimensional structural schematic diagram of the actuator of the present invention;

[0092] Figure 10 This is a three-dimensional structural diagram of the guide element of the present invention;

[0093] Figure 11 This is a three-dimensional structural diagram of the retaining member of the present invention;

[0094] Figure 12 This is a cross-sectional view of the retainer of the present invention;

[0095] Figure 13 This is a bottom view of the first outer casing of the present invention;

[0096] Figure 14 This is a three-dimensional structural diagram of the first outer shell of the present invention;

[0097] Figure 15 This is a cross-sectional view of the container structure when the first auxiliary component of the present invention is in the first position;

[0098] Figure 16 This is a cross-sectional view of the container structure when the second auxiliary component of the present invention is in the first position;

[0099] Figure 17 This is an enlarged perspective cross-sectional view of the injector when the old container is removed according to the present invention;

[0100] Figure 18 This is a cross-sectional view of the assembly structure of the retaining member, the second pusher, and the second auxiliary member when removing the old container according to the present invention;

[0101] Figure 19 An enlarged perspective cross-sectional view of the injector of the present invention when a new container is inserted and the second locking mechanism is unlocked;

[0102] Figure 20 Enlarged partial cross-sectional view of the injector when the new container is loaded and the second locking mechanism is unlocked according to the present invention.

[0103] Figure 21 This is a cross-sectional view of the assembly structure of the retainer, the second pusher, and the second auxiliary component after the new container is inserted according to the present invention.

[0104] Figure 22 This is an enlarged perspective cross-sectional view of the ejector of the present invention after the first liquid aspiration is completed after the new container has been loaded;

[0105] Figure 23 This is a cross-sectional view of the assembly structure of the retaining member, the second pushing member, and the second auxiliary member after the first liquid aspiration is completed after the new container is loaded;

[0106] Figure 24 This is an enlarged perspective cross-sectional view of the injector of the present invention after the first spraying is completed after the new container has been loaded;

[0107] Figure 25This is an exploded view of the assembly structure of the second pusher, the second auxiliary member, and the fourth elastic member of the present invention.

[0108] Figure 26 This is a front view of the injector of the present invention.

[0109] Explanation of reference numerals in the attached figures

[0110] 100. Injector;

[0111] 1. Container; 11. Container body; 111. Cover; 1111. First mounting part; 1112. Cavity; 112. Container body; 12. First auxiliary component; 121. Buckle;

[0112] 2. Spraying mechanism; 21. Infusion component; 22. Spraying body; 221. Nozzle; 222. Pressure chamber; 223. Pump body; 2231. Second abutment boss;

[0113] 3. Actuating mechanism; 31. Retaining member; 311. Second guide ramp; 312. Second abutment surface; 313. Cavity; 314. Second mounting part; 315. First through hole; 316. Groove; 317. Third through hole; 3171. Second protrusion; 3172. First reset guide rib; 3173. Second reset guide rib; 318. Third mounting part; 3181. Outwardly convex ramp; 319. First guide groove; 32. Actuating member; 321. First locking groove; 322. Second locking groove; 323. Outwardly convex structure; 324. First guide protrusion; 325. Abutment surface; 326. Elastic arm; 3261. Pawl structure; 3262. Abutment protrusion; 327. Fifth limiting groove; 328. Protrusion structure; 33. Fifth elastic member;

[0114] 41. First locking mechanism; 411. First locking component; 4111. First abutting part; 4112. First block structure; 4113. Fourth block structure; 4114. Third mounting post; 4115. First snap-fit ​​rib; 412. First elastic element;

[0115] 42. Second locking mechanism; 421. Second locking component; 4211. Second ratchet structure; 4212. Second block structure; 4213. Third block structure; 4214. Fifth mounting post; 4215. Second snap-fit ​​rib; 422. Second elastic element;

[0116] 51. Trigger element; 511. Triggering part;

[0117] 52. Guide component; 521. First guide ramp; 522. First stop surface; 523. Extending protrusion; 524. First limiting groove; 525. First abutting boss;

[0118] 6. Counting disk; 61. Blocking structure; 62. Notch; 63. Fourth ratchet structure;

[0119] 7. Balancing mechanism; 71. Balancing element; 711. Third ratchet structure; 712. Third block structure; 713. Sixth block structure; 714. Seventh mounting post; 72. Third elastic element;

[0120] 8. Unlocking auxiliary mechanism; 81. First pusher; 811. Pushed part; 812. Unlocking part; 813. Connecting part; 82. Second pusher; 821. Second main body; 822. Second extension rib; 8221. Pushing part; 8222. Second through hole; 8223. Fastening surface; 823. Second abutting rib; 8231. Second abutting slope; 824. Ninth mounting post; 83. Second auxiliary component; 831. First main body; 8311. Recessed part; 832. First extension rib; 8321. Fastening part; 833. First abutting rib; 8331. First protrusion; 8332. First abutting slope; 834. Protrusion; 835. Eighth mounting post; 84. Fourth elastic component;

[0121] 91. First outer casing; 911. First mounting post; 912. First limiting rib; 9131. Second limiting groove; 9132. Third limiting groove; 9133. Fourth limiting groove; 9141. Second limiting rib; 9142. Third limiting rib; 9143. Fourth limiting rib; 9151. Second mounting post; 9152. Fourth mounting post; 9153. Sixth mounting post; 916. Annular protrusion; 9161. Recess; 917. Mounting opening;

[0122] 92. Second outer shell. Detailed Implementation

[0123] To make the technical solution and beneficial effects of the present invention more apparent and understandable, a detailed description is provided below by listing specific embodiments. Unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.

[0124] In the description of this invention, unless otherwise expressly defined, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "height," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this invention and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. That is, they should not be construed as limiting this invention.

[0125] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating the relative importance of the indicated features or the number of indicated technical features. Therefore, a feature specified as "first" or "second" can explicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two; "several" means at least one; unless otherwise expressly defined.

[0126] In this invention, unless otherwise explicitly defined, the terms "installation," "connection," "linking," "fixing," and "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral molding; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0127] In this invention, unless otherwise explicitly defined, the terms "above," "on top of," "over," "above," "below," "below," "below," or "below" for "first feature above second feature" can refer to the first and second features being in direct contact, or to the first and second features being in indirect contact through an intermediate medium. Furthermore, "above," "over," and "below" for "first feature above second feature" can mean the first feature is directly above or diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature. Similarly, "below," "below," and "below" for "first feature below second feature" can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0128] In this invention, "upper" and "lower" are both used in the sense of... Figure 1 The markings in the text shall prevail.

[0129] The following is based on Figures 1 to 26 The injector of the present invention will be described in detail.

[0130] In this embodiment, such as Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 8 and Figure 15As shown, the injector 100 includes a container 1, an injection mechanism 2, an actuation mechanism 3, a first locking mechanism 41, and a second locking mechanism 42. The second locking mechanism 42 is located on the side of the container 1 facing the retainer 31. The container 1 is a double-walled bottle with an inner soft film bag containing liquid. The injection mechanism 2 includes an infusion component 21 and an injection body 22. The injection body 22 includes a nozzle 221, a pressure chamber 222, and a pump body 223. One end of the infusion component 21 is inserted into the container 1, and the other end is movably inserted into the pump body 223 of the injection body 22. The actuation mechanism 3 includes a retainer 31 and an actuator 32. The infusion component 21 is held in the retainer 31, and the retainer 31 is movably connected to the actuator 32. When the actuator 32 rotates under external force, the retainer 31 drives the infusion component 21 to move along a first direction, so that the infusion component 21 draws liquid from the container 1 and delivers it to the pressure chamber 222 of the injection body 22 for temporary storage. When the infusion component 21 moves in the second direction, the liquid in the pressure chamber 222 is ejected through the nozzle 221, and the first and second directions are opposite.

[0131] When the number of uses of the injector 100 has not reached the preset value and the infusion component 21 has completed liquid aspiration, the first locking mechanism 41 locks the actuator 32 to execute the first locking mode. This locks the actuator 32 each time liquid aspiration is completed, preventing the user from accidentally triggering the injection by rotating the actuator 32. When injection is triggered, the retaining member 31 moves the infusion component 21 along the second direction under external force, causing the liquid in the pressure chamber 222 to be ejected through the nozzle 221.

[0132] Since there is no backflow gas when the infusion unit 21 draws liquid from container 1, the soft film bag has a certain tension to resist the liquid being drawn out as the number of uses increases, which can easily lead to inaccurate measurement. In order to ensure accurate measurement, there needs to be sufficient volume in container 1 so that the soft film bag has as few wrinkles as possible. When the number of uses of the injector 100 reaches the preset value and the infusion unit 21 completes the liquid aspiration, the second locking mechanism 42 locks the actuator 32 to execute the second locking mode. At this time, the first locking mechanism 41 also locks the actuator 3 to restrict the container 1 from being used for more liquid. The user can trigger the injection to complete the last use of the old container 1 within the limited number of uses. At this time, since the second locking mechanism 42 locks the actuator 32, the user cannot continue to rotate the actuator 32, and therefore cannot trigger the liquid aspiration again. The container must be replaced.

[0133] By adopting the above technical solution, two locking mechanisms are set up: a first locking mechanism 41 and a second locking mechanism 42. The first locking mechanism 41 is used to lock the injector 100 in the fully liquid-absorbing state during normal use of the injector 100 to prevent the user from accidentally triggering the spray by rotating the actuator 32. The second locking mechanism 42 is used to lock the injector 100 in the fully liquid-absorbing state when the number of uses of the injector 100 reaches a preset value. Furthermore, the injector 100 can complete the current spray while the second locking mechanism 42 is locked. That is, the injector 100 can complete the last use of the container 1 within the limited number of uses, thereby improving the liquid utilization rate in the container 1. For example, if the preset value of the number of uses of the injector 100 is 60 times, then the number of uses of a single container 1 is limited to 60 times. The second locking mechanism 42 is used to lock the injector 100 in the fully liquid-absorbing state when the number of uses of the injector 100 reaches 60 times, and the injector 100 can complete the 60th spray of the liquid provided by the container 1. At this time, there is still sufficient liquid remaining in the container 1, but it cannot be used further. In addition, the second locking mechanism 42 is located on the side of the container 1 facing the retainer 31, which can prevent the user from forcibly unlocking the second locking mechanism 42 with other tools, ensuring the security of the lock and preventing the user from continuing to use the old container 1.

[0134] In one implementation, such as Figure 1 As shown, the direction of the downward movement of the retainer 31 is the first direction, and the direction of the upward movement is the second direction. Of course, the direction of movement of the retainer 31 is not limited to this, and it can also move in other directions such as the front-back direction or the left-right direction.

[0135] The following text will take downward as the first direction and upward as the second direction as an example for specific explanation.

[0136] In one implementation, such as Figure 1 , Figure 7 and Figure 26 As shown, the injector 100 also includes a detachably connected first housing 91 and a second housing 92. The second housing 92 is rotatable relative to the first housing 91. The first housing 91 has a hollow first mounting post 911 inside, in which the pump body 223 is mounted. The nozzle 221 is located at the upper part of the first mounting post 911. One end of the actuator 32 extends into the first housing 91 and is rotatably connected to the first housing 91 via a protrusion 328 on its outer wall. The other end of the actuator 32 extends into the second housing 92 and is detachably connected to it. The bottom of the container 1 extends into the second housing 92. When using the injector 100, the user rotates the second housing 92 to rotate the actuator 32. When the container 1 needs to be replaced, it can be removed by detaching the second housing 92.

[0137] In one embodiment, the actuator 32 is not detachable from the first housing 91, such as Figure 1 As shown, the second locking mechanism 42 is isolated within the first housing 91 by the actuator 32, so that the user cannot forcibly unlock the second locking mechanism 42 with other tools.

[0138] In one implementation, such as Figure 1 As shown, the actuation mechanism 3 includes a fifth elastic element 33, which is sleeved on the outer periphery of the container 1. One end of the fifth elastic element 33 abuts against the retainer 31, while the other end is restricted from moving in the vertical direction. When aspiration is triggered, the retainer 31 moves the infusion component 21 downward, compressing the fifth elastic element 33. When ejection is triggered, the fifth elastic element 33 rebounds, pushing the retainer 31 to move the infusion component 21 upward.

[0139] In one implementation, such as Figure 1 , Figure 5 , Figure 6 and Figure 7 As shown, the actuator 32 is sleeved on the outer periphery of the retainer 31. The outer periphery of the retainer 31 is provided with a first guide groove 319, which extends along a first direction. The inner wall of the actuator 32 is provided with a first guide protrusion 324, which is movably inserted into the first guide groove 319. The injector 100 also includes a guide member 52. When the actuator 32 rotates, the retainer 31 rotates synchronously. At the same time, guided by the guide member 52, the retainer 31 moves downward relative to the actuator 32, so that the infusion component 21 moves downward to draw liquid from the container 1. Furthermore, when the retainer 31 moves to the fully liquid-drawing position, the guide member 52 also prevents the retainer 31 from moving upward.

[0140] Furthermore, such as Figure 6 , Figure 10 and Figure 11As shown, the guide member 52 includes a first guide slope 521 and a first abutment surface 522, and the retainer 31 includes a second guide slope 311 and a second abutment surface 312. When the actuator 32 rotates, the first guide slope 521 and the second guide slope 311 cooperate to guide the retainer 31 to move along a first direction. When the retainer 31 moves along the first direction to the fully aspirated position, the first abutment surface 522 abuts against the second abutment surface 312 along the first direction to prevent the retainer 31 from moving along a second direction. Specifically, when the actuator 32 rotates, the first guide slope 521 and the second guide slope 311 cooperate, causing the second guide slope 311 to slide along the first guide slope 521, so that the retainer 31 moves downward relative to the actuator 32 while rotating with the actuator 32. When the retainer 31 moves to the point where the second guide slope 311 disengages from the first guide slope 521, under the elastic force of the fifth elastic member 33, the second stop surface 312 abuts against the first stop surface 522. At this time, the infusion component 21 completes the aspiration of liquid, and the first locking mechanism 41 locks the actuator 32. The actuator 32 can no longer drive the retainer 31 to rotate. The first stop surface 522 is used to prevent the retainer 31 from moving upward under the elastic force of the fifth elastic member 33.

[0141] In one implementation, such as Figure 6 and Figure 26 As shown, the injector 100 includes a trigger 51, which triggers the retaining member 31 to move in a second direction and unlock the first locking mechanism 41, but the trigger 51 cannot unlock the second locking mechanism 42. Specifically, as... Figure 6 , Figure 10 , Figure 11 and Figure 26 As shown, the trigger 51 is a button structure. When the first locking mechanism 41 executes the first locking mode, pressing the trigger 51 causes the first abutting surface 522 to move away from the second abutting surface 312, thereby causing the retaining member 31 to move the infusion component 21 upward, triggering the spray. Furthermore, the upward movement of the retaining member 31 releases the first locking mechanism 41 from locking the actuator 32. When the second locking mechanism 42 executes the second locking mode, pressing the trigger 51 causes the first abutting surface 522 to move away from the second abutting surface 312, thereby causing the retaining member 31 to move the infusion component 21 upward, triggering the spray. However, the upward movement of the retaining member 31 does not release the second locking mechanism 42 from locking the actuator 32. Of course, the structure of the trigger 51 is not limited to a button structure; it can also be a trigger structure or other mechanical switch structures.

[0142] Furthermore, such as Figure 6 , Figure 7 , Figure 10 and Figure 11As shown, the trigger 51 is movably mounted on the mounting port 917 of the first housing 91. The trigger 51 has a trigger part 511, and the guide 52 has an extension protrusion 523. When the infusion component 21 completes aspiration, the user presses the trigger 51, and the trigger part 511 pushes the extension protrusion 523, causing the guide 52 to rotate at a certain angle, thereby causing the first abutment surface 522 to move away from the second abutment surface 312 due to the rotation. Figure 10 and Figure 13 As shown, the guide member 52 is provided with a first limiting groove 524, and the first outer shell 91 is provided with a first limiting rib 912. The width of the first limiting groove 524 is greater than the width of the first limiting rib 912. The first limiting rib 912 extends into the first limiting groove 524. Through the cooperation between the first limiting groove 524 and the first limiting rib 912, the rotatable angle of the guide member 52 is limited. When the actuator 32 is rotated again to trigger liquid aspiration, the second guiding slope 311 of the retainer 31 will apply a pushing force to the first guiding slope 521 of the guide member 52. The retainer 31 and the guide member 52 rotate synchronously. At this time, the guide member 52 rotates and pushes the trigger member 51 to reset. Since the retainer 31 and the guide member 52 rotate synchronously, the retainer 31 only rotates and does not move relative to the actuator 32. When the guide member 52 is reset to the point where it is restricted by the first limiting rib 912 and cannot continue to rotate, the retainer 31 rotates and moves at the same time to trigger liquid aspiration.

[0143] In one implementation, such as Figure 2 , Figure 4 and Figure 10 As shown, the guide 52 is located above the actuator 32 and is arranged around the pump body 223. The inner wall of the guide 52 is provided with a first abutting boss 525, and the outer wall of the pump body 223 is provided with a second abutting boss 2231. The second abutting boss 2231 abuts against the first abutting boss 525, and the bottom of the pump body 223 is located inside the guide 52.

[0144] In one implementation, such as Figure 3 and Figure 6As shown, the first locking mechanism 41 includes a first locking component 411 and a first elastic member 412. The first locking component 411 includes a first abutting portion 4111. When the injector 100 is in its initial state, under the elastic force of the first elastic member 412, the first abutting portion 4111 abuts downward against the retainer 31 and remains stationary. When the retainer 31 moves downward, since the retainer 31 moves away from the first abutting portion 4111, under the elastic force of the first elastic member 412, the first locking component 411 moves downward synchronously, and during the synchronous downward movement of the first locking component 411, the first abutting portion 4111 remains in abutting against the retainer 31. When the infusion component 21 completes aspiration, the first locking component 411 moves to the first locking position and locks the actuator 32. When the injection is triggered, the retainer 31, during its upward movement, can push the first abutting portion 4111 upward, causing the first locking component 411 to leave the first locking position and release the lock.

[0145] In one implementation, such as Figure 5 , Figure 6 , Figure 7 and Figure 9 As shown, the actuator 32 includes a first locking groove 321, and the first locking mechanism 41 includes a first locking component 411. When the first locking component 411 moves downward along with the retaining member 31 to the point where the first locking component 411 abuts against the abutting surface 325 of the actuator 32, the first locking component 411 stops moving downward, and the actuator 32 continues to rotate so that the retaining member 31 continues to drive the infusion component 21 to move downward until the infusion component 21 completes the aspiration. At the same time, the actuator 32 rotates until the first locking groove 321 is located below the first locking component 411. Under the elastic force of the first elastic member 412, the first locking component 411 moves downward until the first locking rib 4115 of the first locking component 411 engages with the first locking groove 321, thereby locking the actuator 32.

[0146] Furthermore, such as Figure 9 As shown, the first locking groove 321 is provided at one end of the actuator 32 facing the spray body 22, and the end face of this end forms an abutment surface 325.

[0147] In one implementation, such as Figure 2 , Figure 4 and Figure 8As shown, the second locking mechanism 42 includes a second locking component 421 and a second elastic element 422, and the injector 100 includes a blocking structure 61. When the number of uses has not reached a preset value, under the elastic force of the second elastic element 422, the second locking component 421 abuts against the blocking structure 61 in the first direction, preventing the second locking component 421 from moving to the second locking position. When the number of uses has reached the preset value, the blocking structure 61 retracts, and under the elastic force of the second elastic element 422, the second locking component 421 moves to the second locking position in the first direction to lock the actuator 32.

[0148] Furthermore, such as Figure 2 As shown, the projections of the second locking member 421 and the retaining member 31 in the second direction do not overlap. Thus, when the second locking mechanism 42 executes the second locking mode, pressing the trigger member 51 causes the retaining member 31 to move the infusion member 21 along the second direction, triggering the injection. Furthermore, since the retaining member 31 does not contact the second locking member 421 during its movement along the second direction, the movement of the retaining member 31 cannot release the locking of the second locking mechanism 42.

[0149] In one implementation, such as Figure 2 , Figure 4 and Figure 9 As shown, the actuator 32 is provided with a second locking groove 322, and the first locking groove 321 and the second locking groove 322 are spaced apart along the circumference of the actuator 32. When the number of uses has not reached the preset value, the second locking member 421 does not contact the second locking groove 322 due to the limiting effect of the blocking structure 61 on the second locking member 421. Furthermore, the second locking member 421 does not contact the first locking groove 321 during the rotation of the actuator 32. When the number of uses reaches the preset value, the second locking member 421 moves downward under the elastic force of the second elastic member 422 due to the retraction of the blocking structure 61, until the second locking rib 4215 of the second locking member 421 engages with the second locking groove 322 to execute the second locking mode.

[0150] Furthermore, such as Figure 9 As shown, the first locking groove 321 and the second locking groove 322 are both located at one end of the actuator 32, and the first locking groove 321 and the second locking groove 322 are at the same height, that is, the upper surfaces of the first locking groove 321 and the second locking groove 322 are flush, which facilitates processing. Figure 5 and Figure 9As shown, since the first locking groove 321 and the second locking groove 322 are spaced apart along the circumference of the actuator 32, when the number of uses has not reached the preset value and liquid aspiration is triggered, the first locking member 411 moves downward to abut against the abutment surface 325 of the actuator 32. By limiting the difference in groove shape or size between the first locking groove 321 and the second locking groove 322, interference from the second locking groove 322 to the first locking member 411 can be avoided during the continued rotation of the actuator 32. Of course, the position of the first locking member 411 when it moves downward to abut against the abutment surface 325 of the actuator 32 can also be limited. That is, at this time, the first locking groove 321, the first locking member 411, and the second locking groove 322 are distributed sequentially along the rotation direction of the actuator 32. In this way, during the continued rotation of the actuator 32, the first locking member 411 will not contact the second locking groove 322, thus avoiding interference from the second locking groove 322 to the first locking member 411.

[0151] Furthermore, such as Figure 6 and Figure 9 As shown, to improve locking stability, there are three first locking slots 321 and three third locking slots 322. The first locking component 411 includes three first engaging ribs 4115 that match the three first locking slots 321 one by one. Each second locking component 421 includes three second engaging ribs 4215 that match the three second locking slots 322 one by one. Among the three first locking slots 321, the length of the middle first locking slot 321 is smaller than the lengths of the first locking slots 321 on either side. Among the three second locking slots 321, the width of the middle second locking slot 322 is smaller than the width of the second locking slots 322 on either side.

[0152] In one implementation, such as Figure 1 , Figure 3 , Figure 5 , Figure 6 and Figure 9As shown, the actuator 32 has two sets of first locking slots 321, each set having three first locking slots 321. The two sets of first locking slots 321 are radially distributed along the actuator 32. The second locking slot 322 is located in the middle of the two sets of first locking slots 321, and the three sets of locking slots are evenly spaced. The first locking mechanism 41 and the second locking mechanism 42 are set at 45° intervals along the circumference of the actuator 32. Thus, when the number of uses has not reached the preset value, the user rotates the second housing 92 half a turn, that is, when the second housing 92 drives the actuator 32 to rotate half a turn, the first locking component 411 engages with one set of first locking slots 321, and the infusion component 21 completes the aspiration of liquid. Then, the user triggers the spray by pressing the trigger 51. When the spray is triggered again, the second housing 92 is rotated half a turn again, and the first locking component 411 engages with the other set of first locking slots 321. When the number of uses reaches the preset value, that is, when the user triggers the aspiration for the last time, when the second housing 92 is rotated half a turn, the first locking component 411 is engaged with one of the first locking slots 321, and the second locking component 421 is engaged with the second locking slot 322, thus executing the first locking mode and the second locking mode simultaneously.

[0153] In one implementation, such as Figure 2 and Figure 4 As shown, the injector 100 also includes a counting disk 6. The outer peripheral surface of the counting disk 6 is provided with numerical markings, scales, or other markings. The first locking mechanism 41 and the second locking mechanism 42 are both located above the counting disk 6. The upper end surface of the counting disk 6 is provided with a first ratchet structure and a notch 62, which are distributed circumferentially along the counting disk 6. The second locking component 421 is provided with a second ratchet structure 4211. When the number of uses has not reached the preset value, under the elastic force of the second elastic member 422, the second ratchet structure 4211 engages with the first ratchet structure, so that the counting disk 6 rotates unidirectionally, wherein the first ratchet structure forms a blocking structure 61. When the number of uses reaches the preset value, the counting disk 6 rotates until the notch 62 and the second ratchet structure 4211 are opposite each other in the first direction, and the notch 62 is used to allow the second locking component 421 to move to the second locking position.

[0154] Furthermore, such as Figure 2 , Figure 7 and Figure 8As shown, the injector 100 also includes a balancing mechanism 7, which includes a balancing element 71 and a third elastic element 72. The balancing element 71 has a third ratchet structure 711. Under the elastic force of the third elastic element 72, the third ratchet structure 711 engages with the first ratchet structure, and the counting disk 6 can only rotate in one direction under the action of the ratchet of the balancing element 71 and the second locking component 421. The circumferential dimension of the third ratchet structure 711 of the counting disk 6 is larger than the width of the notch 62. Thus, when the counting disk 6 rotates to the point where the notch 62 is below the third ratchet structure 711, the third ratchet structure 711 of the balancing element 71 will not fall into the notch 62, avoiding interference with the normal rotation of the counting disk 6. The balancing element 71 does not have a locking rib that can engage with the first locking groove 321 and the second locking groove 322, and therefore does not have a locking function.

[0155] Furthermore, such as Figure 4 and Figure 8 As shown, the counting disk 6 is sleeved on the outer periphery of the actuator 32, and the second locking mechanism 42 and the balancing mechanism 7 are distributed on both radial sides of the actuator 32. In this way, the second locking component 421 and the balancing element 71 can press against the radial sides of the upper end surface of the counting disk 6 respectively, which is conducive to the stable rotation of the counting disk 6.

[0156] In one implementation, such as Figure 6 , Figure 7 , Figure 8 , Figure 13 and Figure 14 As shown, the first outer casing 91 is provided with a second limiting groove 9131, a third limiting groove 9132, and a fourth limiting groove 9133. The first locking component 411 includes a first block structure 4112, the second locking component 421 includes a second block structure 4212, and the balancing element 71 includes a third block structure 712. The first block structure 4112 is movably engaged with the second limiting groove 9131, the second block structure 4212 is movably engaged with the third limiting groove 9132, and the third block structure 712 is engaged with the fourth limiting groove 9133. The first outer casing 91 restricts the rotation of the first locking component 411, the second locking component 421, and the balancing element 71.

[0157] Furthermore, such as Figure 6 , Figure 7 , Figure 8 , Figure 13 and Figure 14As shown, to improve the stability of the assembly of the first locking component 411, the second locking component 421, and the balancing element 71 with the first housing 91, the first housing 91 is further provided with a pair of second limiting ribs 9141, a pair of third limiting ribs 9142, and a pair of fourth limiting ribs 9143. The first locking component 411 includes a fourth block structure 4113, the second locking component 421 includes a fifth block structure 4213, and the balancing element 71 includes a sixth block structure 713. The fourth block structure 4113 is movably engaged between the pair of second limiting ribs 9141, the fifth block structure 4213 is movably engaged between the pair of third limiting ribs 9142, and the sixth block structure 713 is engaged between the pair of fourth limiting ribs 9143.

[0158] In one implementation, such as Figure 2 , Figure 3 , Figures 6 to 8 As shown, the first elastic element 412, the second elastic element 422, and the third elastic element 72 are all springs. One end of the first elastic element 412 is sleeved on the second mounting post 9151 on the inner wall of the first housing 91, and the other end is sleeved on the third mounting post 4114 of the first locking component 411. One end of the second elastic element 422 is sleeved on the fourth mounting post 9152 on the inner wall of the first housing 91, and the other end is sleeved on the fifth mounting post 4214 of the second locking component 421. One end of the third elastic element 72 is connected to the sixth mounting post 9153 on the inner wall of the first housing 91, and the other end is connected to the seventh mounting post 714 of the balancing element 71.

[0159] In one implementation, such as Figure 4 and Figure 9 As shown, the actuator 32 is provided with an outward protrusion structure 323, which is located on the abutment surface 325. The height of the outward protrusion structure 323 protruding from the abutment surface 325 is approximately 0.5 mm. The outward protrusion structure 323 and the second locking groove 322 are distributed sequentially along the rotation direction of the actuator 32. After the second locking mechanism 42 is unlocked, if the injector 100 is activated again, the second locking component 421 needs to re-engage with the counting disk 6. Due to the engagement between the second locking component 421 and the counting disk 6, the lowest point of the second locking component 421 is lower than the highest point of the counting disk 6 when the second locking mechanism 42 is unlocked. To ensure smooth rotation of the counting disk 6, a protruding structure 323 is provided. During the rotation of the actuator 32 after unlocking the second locking mechanism 42, the protruding structure 323 pushes the second locking component 421 upwards, allowing the counting disk 6 to rotate smoothly. When the actuator 32 rotates until the protruding structure 323 disengages from the second locking component 421, the first ratchet structure of the second locking component 421 re-engages with the counting disk 6. Furthermore, during the upward pushing of the second locking component 421 by the protruding structure 323, the balancing element 71 remains engaged with the counting disk 6, preventing tooth skipping.

[0160] In one embodiment, when the counting disk 6 and the actuator 32 are in a mating state, the actuator 32 can drive the counting disk 6 to rotate for counting. When the counting disk 6 and the actuator 32 are not in a mating state, the actuator 32 can rotate independently of the counting disk 6 to ensure that the counting disk 6 has a large counting capacity.

[0161] like Figure 7 As shown, the actuator 32 is provided with an elastic arm 326, the elastic arm 326 is provided with a pawl structure 3261 and an abutment protrusion 3262, the pawl structure 3261 and the abutment protrusion 3262 are spaced apart in a first direction. Figure 14 As shown, the inner wall of the first outer casing 91 is provided with an annular protrusion 916, and the annular protrusion 916 is provided with an inner recess 9161, such as... Figure 8 As shown, the inner wall of the counting disk 6 is provided with a fourth ratchet structure 63, and the elastic arm 326 partially extends into the inner wall of the counting disk 6. When the actuator 32 rotates until the abutting protrusion 3262 extends into the recess 9161, the elastic arm 326 is in its initial state, and the pawl structure 3261 engages with the fourth ratchet structure 63. At this time, the counting disk 6 and the actuator 32 are in a cooperative state, and the counting disk 6 rotates with the actuator 32 to count. When the actuator 32 rotates until the abutting protrusion 3262 abuts against the annular protrusion 916, the groove wall of the annular protrusion 916 radially presses inward against the abutting protrusion 3262, forcing the elastic arm 326 to deform inward, thereby causing the pawl structure 3261 to disengage from the fourth ratchet structure 63. At this time, the counting disk 6 and the actuator 32 are in a non-cooperative state, and the counting disk 6 does not rotate with the actuator 32.

[0162] In one embodiment, the new container 1 is configured to unlock the second locking mechanism 42, while the old container 1 is configured not to unlock the second locking mechanism 42. Using the new container 1 as the unlocking key, the user must install the new container 1 to continue using the injector 100.

[0163] In one implementation, such as Figure 1 and Figure 2 As shown, the injector 100 also includes an unlocking auxiliary mechanism 8, which includes a first pusher 81. (As shown...) Figure 17 As shown, when the second locking mechanism 42 locks the actuation mechanism 3, if the container 1 is replaced, such as Figure 19As shown, during the process of inserting the new container 1, the moving new container 1 can push the first pusher 81 to move along the second direction to the unlocked position. During the movement, the first pusher 81 pushes the second locking component 421 away from the second locking position, thereby unlocking the container. However, if the old container 1 is reinstalled, the moving old container 1 cannot push the first pusher 81 to the unlocked position. By limiting the structural differences between the new container 1 and the old container 1, it is ensured that the user cannot continue to use the old container 1 after the preset number of uses has been reached.

[0164] Furthermore, such as Figure 2 and Figure 19 As shown, the unlocking auxiliary mechanism 8 also includes a second pusher 82. When a new container 1 is replaced, the moving new container 1 can push the second pusher 82 in a second direction, thereby pushing the first pusher 81 to the unlock position. In this design, the pusher for unlocking assistance is configured as two parts, which facilitates the assembly of the unlocking auxiliary mechanism 8 within the limited space inside the injector 100.

[0165] In one implementation, such as Figure 2 As shown, the first pusher 81 is mounted on the actuator 32, and the second pusher 82 is mounted on the retainer 31, which facilitates a compact structure. Specifically, as... Figure 2 , Figure 9 and Figure 22 As shown, the actuator 32 is provided with a fifth limiting groove 327, which is located below a second locking groove 322 and the two are connected. The first pusher 81 is provided with a pushed part 811, an unlocking part 812, and a connecting part 813. The pushed part 811 and the unlocking part 812 are respectively connected to the connecting part 813, and the unlocking part 812 is at least partially located in the fifth limiting groove 327. Figure 17 and Figure 19 As shown, when the second locking mechanism 42 locks the actuator 32 and a new container 1 is inserted, the new container 1 pushes the second pusher 82 upward, the second pusher 82 pushes the pushed part 811 of the first pusher 81 upward, and the unlocking part 812 pushes the second locking component 421 upward, so that the second locking component 421 releases the lock on the actuator 32.

[0166] In one implementation, such as Figure 1 As shown, container 1 includes a container body 11 and a first auxiliary component 12, the first auxiliary component 12 being movably connected to the container body 11. Figure 15 As shown, when container 1 is not enabled, the first auxiliary component 12 is in the first position. Figure 15 and Figure 19 As shown, when a new container 1 is loaded, the second pusher 82 abuts against the first auxiliary member 12 along the first direction. Figure 16 and Figure 24As shown, during the first injection process after the new container 1 is loaded, the first auxiliary component 12 moves to a second position under the pressure of the second pusher 82 along the first direction, so that the container 1 becomes the old container 1. The structural difference between the new container 1 and the old container 1 is formed by the positional change of the first auxiliary component 12 in the first direction.

[0167] Furthermore, such as Figure 15 As shown, the container body 11 includes a lid 111 and a body 112. The lid 111 is mounted on the body 112. The lid 111 and the body 112 can be detachably connected (e.g., fastened), fixed by heat pressing, or integrally formed. The lid 111 has an opening at least on one side facing the retainer 31. The lid 111 has a first mounting portion 1111 and a cavity 1112 sequentially distributed along a first direction. Figure 15 As shown, when the first auxiliary component 12 is in the first position, the first auxiliary component 12 is detachably connected to the first mounting portion 1111. Figure 16 As shown, when the first auxiliary component 12 is in the second position, the first auxiliary component 12 is located within the cavity 1112. Specifically, as... Figure 19 and Figure 24 As shown, during the first spraying process after the new container 1 is inserted, the first auxiliary component 12 disengages from the connection of the first mounting part 1111 under the downward pressure of the second pusher 82. It can then fall into the cavity 1112 under its own weight or move into the cavity 1112 under the pressure of the second pusher 82. In this design, the force exerted by the second pusher 82 on the first auxiliary component 12 is greater than the separation force between the first mounting part 1111 and the first auxiliary component 12, thus transforming the new container 1 into the old container 1 during the first spraying process after the new container 1 is inserted. It should be understood that if the old container 1 is re-inserted, the first auxiliary component 12 in the second position cannot contact the second pusher 82, or the first auxiliary component 12 in the second position can contact the second pusher 82, but the distance it pushes the second pusher 82 upward is insufficient to unlock the second locking mechanism 42 by pushing the first pusher 81.

[0168] Furthermore, such as Figure 15 As shown, the cover 111 is fitted onto one end of the container body 112. Both ends of the cover 111 are open. A cavity 1112 is formed between the first mounting part 1111 and the end of the container body 112. The container body 11 has a simple structure and is easy to process.

[0169] Furthermore, such as Figure 15As shown, the first mounting part 1111 and the first auxiliary component 12 are connected by a snap-fit, which makes installation and removal convenient. Specifically, the inner wall of the cover 111 is provided with a snap groove, which constitutes the first mounting part 1111. The outer wall of the first auxiliary component 12 is provided with a buckle 121. When the first auxiliary component 12 is in the first position, the buckle 121 is snapped onto the first mounting part 1111.

[0170] Furthermore, the first auxiliary component 12 is a plug.

[0171] In one implementation, such as Figure 3 , Figure 11 and Figure 12 As shown, the retainer 31 has recesses 313 and a second mounting portion 314 sequentially distributed along a first direction. The container 1 is detachably connected to the second mounting portion 314, which can be a snap-fit. Figure 19 and Figure 24 As shown, when the injector 100 is in the initial state, the retainer 31 is in the upper limit position. At this time, the guide 52 is at least partially located in the cavity 313 and the bottom surface of the guide 52 abuts against the bottom wall of the cavity 313.

[0172] like Figure 24 As shown, when the second locking mechanism 42 locks the actuator 32 and the spraying is completed, the sprayer 100 returns to its initial state, the retainer 31 is in the upper limit position, and the bottom surface of the retainer 31 abuts against the bottom wall of the cavity 313. During the subsequent replacement of the new container 1, the movable space of the second pusher 82 is limited due to the distance between the bottom surface of the retainer 31 and the container 1. Furthermore, during the first spraying process after the new container 1 is inserted, the second pusher 82 needs to push the first auxiliary member 12 downwards to turn the new container 1 into the old container 1. This requires other components to apply a downward force to the second pusher 82. Therefore, in this solution, if... Figure 1 and Figure 2 As shown, the unlocking auxiliary mechanism 8 also includes a second auxiliary member 83, which is movably connected to the retaining member 31. A second pusher 82 is movably connected to the second auxiliary member 83. The second auxiliary member 83 is partially located in the cavity 313. By changing the position between the second auxiliary member 83 and the second pusher 82, the second pusher 82 can push the first pusher 81 upward to the unlock position. At the same time, it can also push the first auxiliary member 12 from the first position to the second position during the first spray after the new container 1 is inserted.

[0173] Furthermore, such as Figure 2 As shown, the unlocking auxiliary mechanism 8 also includes a fourth elastic member 84, one end of which is sleeved on the eighth mounting post 835 of the second auxiliary member 83, and the other end is sleeved on the ninth mounting post 824 of the second push member 82.

[0174] like Figure 17 and Figure 18 As shown, when the old container 1 is removed, the last spray of the old container 1 in the limited number of uses has been completed, one end of the guide 52 extends into the cavity 313 and abuts downward against the second auxiliary member 83, the second auxiliary member 83 is in the first lower limit position, and the second pusher 82 is in the second lower limit position under the elastic force of the fourth elastic member 84.

[0175] like Figures 19 to 21 As shown, when a new container 1 is loaded, the first auxiliary member 12 pushes the second pusher 82 upward, and the second pusher 82 pushes the first pusher 81 upward to unlock the second locking mechanism 42. The fourth elastic member 84 is compressed upward by the second pusher 82. During this process, since the second auxiliary member 83 is pressed downward by the guide member 52, the second auxiliary member 83 does not move and remains in the first lower limit position. When the new container 1 is assembled, the second pusher 82 is in the second upper limit position. At this time, the connection between the second auxiliary member 83 and the second pusher 82 is disconnected, and only the fourth elastic member 84 is connected.

[0176] like Figure 22 and Figure 23 As shown, during the first triggering of aspiration after the new container 1 is inserted, the retainer 31 drives the second auxiliary component 83, the second pusher 82, the container 1, and the infusion component 21 to move downwards synchronously. At this time, since the second auxiliary component 83 is away from the guide 52, under the rebound force of the fourth elastic component 84, the second auxiliary component 83 moves upward relative to the second pusher 82. During this process, since the connection between the second auxiliary component 83 and the second pusher 82 is broken, the second pusher 82 is still in the second upper limit position. When the second auxiliary component 83 moves to the point where it reconnects with the second pusher 82, the second auxiliary component 83 stops moving. At this time, the second auxiliary component 83 is in the second upper limit position.

[0177] like Figure 24 As shown, during the first trigger spraying process after the new container 1 is loaded, the retaining member 31 drives the second auxiliary member 83, the second pusher 82, the container 1 and the infusion component 21 to move upward synchronously. The second auxiliary member 83 moves until it abuts against the guide member 52 and stops moving. The retaining member 31 drives the container body 11 to continue moving upward. The first auxiliary member 12 moves downward to the second position under the pressure of the second pusher 82, and the new container 1 becomes the old container 1.

[0178] Furthermore, such as Figure 2 , Figure 11 , Figure 17 and Figure 25As shown, the second auxiliary member 83 includes a connected first main body portion 831 and two first extending ribs 832; the retaining member 31 is provided with two first through holes 315, and the two first extending ribs 832 are correspondingly arranged with the two first through holes 315. The first main body portion 831 is located in the cavity 313, and the first extending ribs 832 pass through the corresponding first through holes 315. The second pusher 82 is located on the side of the retaining member 31 facing the container 1. The second pusher 82 includes a connected second main body portion 821 and two second extending ribs 822, and the two second extending ribs 822 are matched with the two first extending ribs 832. The second extending ribs 822 are movably connected to the corresponding first extending ribs 832, and the second main body portion 821 is used to abut against the first auxiliary member 12. It should be understood that the number of the three structures—first extending ribs 832, first through holes 315, and second extending ribs 822—is not limited to two; it can also be three or even more, as long as they are matched one-to-one.

[0179] Furthermore, such as Figure 19 and Figure 25 As shown, the second extension rib 822 is provided with a pushing part 8221. The pushing part 8221 of one of the second extension ribs 822 is positioned opposite to the first pusher 81 in a second direction. The pushing part 8221 is used to push the first pusher 81 to the unlocked position. In this solution, in order to simplify the manufacturing process, the two second extension ribs 822 have the same structure and are both provided with a pushing part 8221. Of course, it is also possible to provide a pushing part 8221 on only one of the second extension ribs 822.

[0180] Furthermore, such as Figure 2 and Figure 11 As shown, the outer wall of the retainer 31 is provided with a groove 316 extending in the second direction. The first pusher 81 is provided with a pushed part 811. The pusher part 8221 and the pushed part 811 are arranged in the groove 316 in sequence along the second direction. The groove 316 is used to restrict the first pusher 81 and the second pusher 82 from rotating, that is, the first pusher 81 and the second pusher 82 can only move in the vertical direction.

[0181] In one implementation, such as Figure 2 and Figure 25 As shown, the first extension rib 832 is provided with a fastening part 8321, and the second extension rib 822 has a bent structure and is provided with a second through hole 8222 and a fastening surface 8223 connected to each other. The first extension rib 832 extends into the second through hole 8222.

[0182] When the old container 1 is removed, the first main body 831 abuts against the cavity wall of the cavity 313 under the pressure of the guide 52, the fastening part 8321 fastens to the fastening surface 8223, the second auxiliary part 83 is in the first lower limit position, and the second pusher 82 is in the second lower limit position.

[0183] When a new container 1 is loaded, under the pressure of the first auxiliary member 12, the second pusher 82 moves upward, and the fastening surface 8223 disengages from the fastening part 8321, that is, the connection between the second auxiliary member 83 and the second pusher 82 is broken. When the new container 1 is assembled, the second auxiliary member 83 is still in the first lower limit position, and the second pusher 82 moves to the second upper limit position.

[0184] During the first liquid aspiration process after the new container 1 is inserted, under the rebound force of the fourth elastic member 84, the second auxiliary member 83 moves upward until the fastening part 8321 re-fastens to the fastening surface 8223 and stops moving. When the liquid aspiration is completed, the second auxiliary member 83 is at the second upper limit position, and the second pusher 82 is still at the second upper limit position.

[0185] Furthermore, such as Figure 11 , Figure 18 and Figure 25 As shown, the second auxiliary member 83 also includes two first abutting ribs 833, each with a first protrusion 8331; the retaining member 31 has two third through holes 317, each with a second protrusion 3171. The first abutting ribs 833 extend into the third through holes 317 respectively, and the outer wall of each first abutting rib abuts against the second protrusion 3171. The second pusher 82 includes two second abutting ribs 823, which are correspondingly arranged with the first abutting ribs 833. It should be understood that the number of the three structures—first abutting ribs 833, third through holes 317, and second abutting ribs 823—is not limited to two; it can also be three or more, as long as they are matched one-to-one.

[0186] like Figure 18 As shown, when the old container 1 is removed, the projection of the second abutment rib 823 in the second direction falls entirely on the first main body 831. That is, the projections of the first abutment rib 833 and the corresponding second abutment rib 823 in the first direction do not coincide, and the second abutment rib 823 is completely located inside the first abutment rib 833. Since the first auxiliary component 12 of the new container 1 is fastened to the first mounting part 1111 of the container body 11, the fastening is relatively firm. It is difficult for the second auxiliary component 83 to be pushed down from the first position to the second position by the second pusher 82 driven by the fourth elastic component 84 alone. Therefore, in this solution, if... Figure 23As shown, during the first triggering of liquid aspiration after the new container 1 is loaded, the second auxiliary member 83 moves upward until the first protrusion 8331 is pressed inward by the second protrusion 3171, so that the first abutting rib 833 deforms in the direction toward its inward side, thereby making the projections of the first abutting rib 833 and the corresponding second abutting rib 823 at least partially overlap in the first direction. Thus, during the first triggering of spraying after the new container 1 is loaded, the first abutting rib 833 can abut against the second abutting rib 823 downward, so that the first abutting rib 833 can push the second abutting rib 823 downward, thereby causing the second pusher 82 to push the first auxiliary member 12 downward from the first position to the second position.

[0187] Furthermore, such as Figure 11 , Figure 12 and Figure 23 As shown, the retainer 31 is provided with a third mounting portion 318, to which the infusion component 21 is connected. The outer wall of the third mounting portion 318 forms one side wall of the third through hole 317. The third mounting portion 318 passes through the second auxiliary component 83 and the second pusher 82. The outer wall of the third mounting portion 318 is provided with two outwardly convex inclined surfaces 3181, which are inclined outward in the second direction. The outwardly convex inclined surfaces 3181 are correspondingly arranged with the second abutment ribs 823. During the process of loading a new container 1, the new container 1 pushes the second pusher 82 upward. The second abutment ribs 823 are deformed by being squeezed outward by the corresponding outwardly convex inclined surfaces 3181. This increases the overlapping area of ​​the projections of the first abutment rib 833 and the corresponding second abutment rib 823 in the first direction, which is beneficial for the first abutment rib 833 to stably push the second abutment rib 823 downward. Furthermore, since the third mounting part 318 passes through the second auxiliary member 83 and the second pusher 82, in order to ensure a stable fit between the second auxiliary member 83 and the second pusher 82, the number of the fourth elastic members 84 is two or more and they are arranged in a circular array.

[0188] In one implementation, such as Figure 17 and Figure 18 As shown, the first main body 831 has two recesses 8311 on the side opposite to the first abutting rib 833. The two recesses 8311 are matched with the two first abutting ribs 833 one by one. By setting the recesses 8311, weak points are formed on the first main body 831, which is conducive to the inward deformation of the first abutting rib 833.

[0189] Furthermore, such as Figures 17 to 19As shown, the first main body 831 has two protrusions 834 on the side surface facing the guide 52, and the protrusions 834 are correspondingly arranged on the outer side of the recess 8311. During the first trigger spraying process after the new container 1 is loaded, the retainer 31 drives the second auxiliary member 83, the second pusher 82, the container 1 and the infusion component 21 to move upward synchronously. When the second auxiliary member 83, which is at the first upper limit position, moves to abut against the bottom surface of the guide 52, the protrusions 834 are squeezed downward along the guide 52 as the retainer 31 continues to drive the container 1 upward. The protrusions 834 cooperate with the recess 8311 to increase the inward deformation of the first abutment rib 833, which is beneficial for the inward deformation of the first abutment rib 833.

[0190] In one implementation, such as Figure 23 and Figure 25 As shown, the first abutting rib 833 has a first abutting inclined surface 8332 at one end facing the second pusher 82, and the second abutting rib 823 has a second abutting inclined surface 8231 at one end facing the second auxiliary member 83. The first abutting inclined surface 8332 slopes downward from the outside to the inside. During the process of the first abutting rib 833 pushing the second abutting rib 823 to move along the first direction, the first abutting inclined surface 8332 and the second abutting inclined surface 8231 abut against each other. In this design, the configuration of the two inclined surfaces, the first abutting inclined surface 8332 and the second abutting inclined surface 8231, facilitates stable contact between the first abutting rib 833 and the second abutting rib 823.

[0191] In one implementation, such as Figure 12 , Figure 18 and Figure 23 As shown, the third through hole 317 is provided with a first reset guide rib 3172 and a second reset guide rib 3173. During the first trigger spraying process after the new container 1 is loaded, when the first auxiliary part 12 of the new container 1 is pushed away from the first mounting part 1111 by the second pusher 82, the first abutment rib 833 continues to move downwards and moves along the surface of the first reset guide rib 3172. Through the outer contour shape of the first reset guide rib 3172, the first abutment rib 833 is guided to restore its outward deformation; the second abutment rib 823 continues to move downwards and moves along the surface of the second reset guide rib 3173. Through the outer contour shape of the second reset guide rib 3173, the second abutment rib 823 is guided to restore its inward deformation.

[0192] Furthermore, such as Figure 21 As shown, when the new container 1 is assembled, the second main body 821 abuts against the second reset guide rib 3173, that is, the second reset guide rib 3173 is also used to limit the second upper limit position of the second main body 821.

[0193] It should be understood that in this article, the "first upper limit position" and "first lower limit position" of the second auxiliary component 83 and the "second upper limit position" and "second lower limit position" of the second push component 82 are all relative to the retaining component 31.

[0194] It should be understood that "completing liquid aspiration" in this article refers to the state of the injector 100 when it completes one metering liquid aspiration.

[0195] It should be understood that, in order to ensure that the above transmission relationship can be stably executed, the elastic force of the fifth elastic member 33 is greater than the separation force at the connection between the retaining member 31 and the container 1, the separation force at the connection between the retaining member 31 and the container 1 is greater than the separation force at the connection between the first auxiliary member 12 and the cover 111 when the first auxiliary member 12 is in the first position, and the separation force at the connection between the first auxiliary member 12 and the cover 111 when the first auxiliary member 12 is in the first position is greater than the elastic force of the fourth elastic member 84 and the second elastic member 422, respectively.

[0196] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of the present invention that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of the present invention and do not limit the scope of protection of this patent.

Claims

1. An injector, characterized in that, The injector (100) includes: Container (1), which is used to hold liquid; The injection mechanism (2) includes an infusion component (21); An actuation mechanism (3) includes a retainer (31) and an actuator (32), the retainer (31) being used to hold the infusion component (21) and being movably connected to the actuator (32); when the actuator (32) rotates, the retainer (31) drives the infusion component (21) to move in a first direction so that the infusion component (21) draws liquid from the container (1); When the number of uses of the injector (100) has not reached a preset value and the infusion component (21) has completed the aspiration, the first locking mechanism (41) locks the actuator (32) to execute the first locking mode. The second locking mechanism (42) is located on the side of the container (1) facing the retainer (31). When the number of uses of the injector (100) reaches a preset value and the infusion component (21) completes the aspiration, the second locking mechanism (42) locks the actuator (32) to execute the second locking mode. In both locking modes, the retainer (31) can be moved along the second direction by external force to trigger the injection; the first direction and the second direction are opposite. The new container (1) is configured to unlock the second locking mechanism (42); the injector (100) also includes a trigger (51) for triggering the retainer (31) to move in a second direction and unlock the first locking mechanism (41), but not the second locking mechanism (42).

2. The injector according to claim 1, characterized in that, The old container (1) is configured to be unable to unlock the second locking mechanism (42).

3. The injector according to claim 1, characterized in that, The first locking mechanism (41) includes a first locking component (411) and a first elastic member (412), wherein the first locking component (411) includes a first abutting portion (4111). When the injector (100) is in the initial state, under the elastic force of the first elastic member (412), the first abutting part (4111) abuts against the retainer (31) in the first direction. When the retainer (31) moves along the first direction, the first locking member (411) moves along the first direction under the elastic force of the first elastic member (412); When the infusion component (21) completes the aspiration, the first locking component (411) moves to the first locking position and locks the actuator (32). When the retainer (31) moves in the second direction, the retainer (31) can push the first abutment (4111) to release the first locking member (411).

4. The injector according to any one of claims 1-3, characterized in that, The second locking mechanism (42) includes a second locking component (421) and a second elastic element (422), and the injector (100) includes a blocking structure (61). When the number of uses does not reach the preset value, under the elastic force of the second elastic member (422), the second locking member (421) abuts against the blocking structure (61) in the first direction. When the number of uses reaches a preset value, the blocking structure (61) gives way, and under the elastic force of the second elastic member (422), the second locking member (421) moves along the first direction to the second locking position to lock the actuator (32).

5. The injector according to claim 4, characterized in that, When the second locking mechanism (42) executes the second locking mode, pressing the trigger (51) can cause the retainer (31) to move the infusion component (21) in the second direction, triggering the injection; The projections of the second locking member (421) and the retaining member (31) in the second direction do not overlap; the retaining member (31) does not contact the second locking member (421) during its movement in the second direction, and the movement of the retaining member (31) cannot release the locking of the second locking mechanism (42).

6. The injector according to claim 4, characterized in that, The injector (100) also includes a counting disk (6) having a first ratchet structure and a notch (62), and the second locking component (421) having a second ratchet structure (4211). When the number of uses does not reach the preset value, under the elastic force of the second elastic member (422), the second ratchet structure (4211) engages with the first ratchet structure, wherein the first ratchet structure forms the blocking structure (61). When the number of uses reaches a preset value, the counting disk (6) rotates until the notch (62) is opposite to the second ratchet structure (4211) in the first direction. The notch (62) is used to allow the second locking component (421) to move to the second locking position.

7. The injector according to claim 6, characterized in that, The injector (100) also includes a balancing mechanism (7), which includes a balancing element (71) and a third elastic element (72), the balancing element (71) being provided with a third ratchet structure (711). Under the elastic force of the third elastic member (72), the third ratchet structure (711) engages with the first ratchet structure; wherein the third ratchet structure (711) has a circumferential dimension on the counting disk (6) that is greater than the width of the notch (62).

8. The injector according to claim 7, characterized in that, The counting disk (6) is sleeved on the outer periphery of the actuator (32), and the second locking mechanism (42) and the balancing mechanism (7) are respectively distributed on the radial sides of the actuator (32).

9. The injector according to claim 6, characterized in that, The actuator (32) is provided with a first locking groove (321) and a second locking groove (322), the first locking groove (321) and the second locking groove (322) being distributed circumferentially apart along the actuator (32); The first locking mechanism (41) includes a first locking component (411), which engages with the first locking groove (321) along a first direction to perform the first locking mode; The second locking component (421) engages with the second locking groove (322) along the first direction to perform the second locking mode.

10. The injector according to claim 9, characterized in that, The actuator (32) is provided with an outward protrusion structure (323), and the outward protrusion structure (323) and the second locking groove (322) are distributed sequentially along the rotation direction of the actuator (32); When the second locking mechanism (42) is unlocked, during the process of rotating the actuator (32) again, the protruding structure (323) is used to lift the second locking component (421) so that the counting disk (6) can rotate smoothly to re-engage with the first ratchet structure.

11. The injector according to any one of claims 1-3, characterized in that, The injector (100) also includes a first housing (91), the actuator (32) being rotatably connected to the first housing (91), and the second locking mechanism (42) being isolated within the first housing (91) by the actuator (32).

12. The injector according to claim 4, characterized in that, The injector (100) also includes an unlocking auxiliary mechanism (8), which includes a first pusher (81); When the second locking mechanism (42) locks the actuator (32), if the container (1) is replaced, the new container (1) is configured to push the first pusher (81) to move in the second direction to the unlock position, and the first pusher (81) pushes the second locking component (421) away from the second locking position to achieve unlocking; if the old container (1) is installed, the old container (1) is configured not to push the first pusher (81) to move to the unlock position.

13. The injector according to claim 12, characterized in that, The unlocking auxiliary mechanism (8) also includes a second pusher (82); When a new container (1) is replaced, the new container (1) is configured to push the second pusher (82) in the second direction, such that the second pusher (82) pushes the first pusher (81) to the unlock position.

14. The injector according to claim 13, characterized in that, The container (1) includes a container body (11) and a first auxiliary component (12), the first auxiliary component (12) being movably connected to the container body (11). When the container (1) is not activated, the first auxiliary component (12) is in the first position; When a new container (1) is loaded, the second pusher (82) abuts against the first auxiliary member (12) in the first direction. During the first spraying process after the new container (1) is loaded, the first auxiliary component (12) moves to the second position under the pressure of the second pusher (82) in the first direction, so that the container (1) becomes the old container (1).

15. The injector according to claim 14, characterized in that, The container body (11) includes a cover (111) and a body (112), with the cover (111) installed on the body (112). The cover (111) has an opening at least on one side facing the retainer (31), and the cover (111) is provided with a first mounting portion (1111) and a cavity (1112) distributed sequentially along a first direction. When the first auxiliary component (12) is in the first position, the first auxiliary component (12) is detachably connected to the first mounting part (1111). When the first auxiliary component (12) is in the second position, the first auxiliary component (12) is located inside the cavity (1112).

16. The injector according to claim 15, characterized in that, The cover (111) is sleeved on one end of the body (112), and the cavity (1112) is formed between the first mounting part (1111) and the end of the body (112).

17. The injector according to claim 14, characterized in that, The injector (100) also includes a guide (52); When the actuator (32) rotates, the guide (52) guides the retainer (31) to move in a first direction; When the retainer (31) moves in the first direction to the fully aspirated position, the guide (52) is used to prevent the retainer (31) from moving in the second direction.

18. The injector according to claim 17, characterized in that, The retainer (31) is provided with a cavity (313) and a second mounting part (314) distributed sequentially along the first direction, and the container (1) is detachably connected to the second mounting part (314). The unlocking auxiliary mechanism (8) further includes a second auxiliary member (83), which is movably connected to the retaining member (31), and a second pusher (82) is movably connected to the second auxiliary member (83), which is partially located within the cavity (313).

19. The injector according to claim 18, characterized in that, The unlocking auxiliary mechanism (8) further includes a fourth elastic element (84), which is connected to the second auxiliary element (83) and the second pusher (82) respectively; When the old container (1) is removed, one end of the guide (52) extends into the cavity (313) and abuts against the second auxiliary member (83) in the first direction. When a new container (1) is loaded, the first auxiliary member (12) pushes the second pusher (82) in the second direction to unlock the second locking mechanism (42), and the fourth elastic member (84) is compressed; During the first triggering of liquid aspiration after the new container (1) is loaded, the fourth elastic member (84) rebounds, causing the second auxiliary member (83) to move relative to the second pusher (82) in the second direction; During the first triggering of the spray after the new container (1) is loaded, the second auxiliary component (83) moves to abut against the guide (52), the retainer (31) drives the container body (11) to continue moving along the first direction, and the first auxiliary component (12) moves to the second position along the second direction under the pressure of the second pusher (82).

20. The injector according to claim 19, characterized in that, The second auxiliary member (83) includes a connected first main body (831) and a plurality of first extension ribs (832); the retainer (31) is provided with a first through hole (315), the first main body (831) is located in the cavity (313), and the first extension ribs (832) pass through the first through hole (315). The second pusher (82) is located on the side of the retainer (31) facing the container (1). The second pusher (82) includes a connected second main body (821) and a plurality of second extension ribs (822). The second extension ribs (822) are movably connected to the first extension rib (832). The second main body (821) is used to abut against the first auxiliary member (12).

21. The injector according to claim 20, characterized in that, At least one of the second extension ribs (822) is provided with a pushing part (8221), which is positioned opposite to the first pusher (81) in a second direction, and the pushing part (8221) is used to push the first pusher (81) to move to the unlock position.

22. The injector according to claim 21, characterized in that, The outer wall of the retainer (31) is provided with a groove (316) extending in the second direction, and the first pusher (81) is provided with a pushed part (811). The push part (8221) and the pushed part (811) are arranged in the groove (316) in sequence along the second direction.

23. The injector according to claim 20, characterized in that, The first extension rib (832) is provided with a fastening part (8321), and the second extension rib (822) has a bent structure and is provided with a second through hole (8222) and a fastening surface (8223) connected to each other. The first extension rib (832) extends into the second through hole (8222). When the old container (1) is removed, the first main body (831) abuts against the cavity wall of the cavity (313) under the pressure of the guide (52), and the fastening part (8321) fastens to the fastening surface (8223). When a new container (1) is loaded, under the pressure of the first auxiliary member (12), the second pusher (82) moves in the second direction and the fastening surface (8223) disengages from the fastening part (8321). During the first triggering of liquid aspiration after the new container (1) is inserted, under the rebound force of the fourth elastic member (84), the second auxiliary member (83) moves along the second direction to the fastening part (8321) and re-fastens to the fastening surface (8223).

24. The injector according to claim 20, characterized in that, The second auxiliary member (83) further includes a plurality of first abutting ribs (833), each of which has a first protrusion (8331); the retaining member (31) has a plurality of third through holes (317), each of which has a second protrusion (3171), each of which has a corresponding first abutting rib (833) extending into the third through hole (317) and its outer wall abutting against the second protrusion (3171); the second pusher (82) includes a plurality of second abutting ribs (823), each of which has a corresponding second abutting rib (823) and a corresponding first abutting rib (833); When the old container (1) is removed, the projection of the second abutment rib (823) in the second direction falls entirely on the first main body (831); During the first triggering of liquid aspiration after the new container (1) is loaded, the second auxiliary member (83) moves along the second direction until the first protrusion (8331) is pressed inward by the second protrusion (3171), so that the first abutting rib (833) deforms inward, thereby making the projection of the first abutting rib (833) and the corresponding second abutting rib (823) in the first direction at least partially overlap; During the first trigger spray after the new container (1) is loaded, the first abutment rib (833) pushes the second abutment rib (823) to move in the first direction so that the second pusher (82) pushes the first auxiliary member (12) to the second position.

25. The injector according to claim 24, characterized in that, The retainer (31) is provided with a third mounting part (318), and the infusion component (21) is connected to the third mounting part (318); the outer wall of the third mounting part (318) forms one side wall of the third through hole (317), and the outer wall of the third mounting part (318) is provided with a plurality of outwardly protruding inclined surfaces (3181), the outwardly protruding inclined surfaces (3181) are inclined outward along the second direction, and the outwardly protruding inclined surfaces (3181) are correspondingly arranged with the second abutment rib (823); During the process of loading a new container (1), the second pusher (82) moves along the second direction, and the second abutting rib (823) is deformed by being squeezed outward by the correspondingly provided convex inclined surface (3181).

26. The injector according to claim 24, characterized in that, The first main body (831) has a plurality of recesses (8311) on the side opposite to the first abutting rib (833), and the recesses (8311) are matched with the first abutting rib (833) one by one.

27. The injector according to claim 26, characterized in that, The first main body (831) has a plurality of protrusions (834) on one side surface facing the guide (52), and the protrusions (834) are respectively disposed on the outer side of the recess (8311). When the protrusion (834) is compressed along the first direction, the protrusion (834) cooperates with the recess (8311) to increase the inward deformation of the first abutment rib (833).

28. The injector according to claim 25, characterized in that, The first abutting rib (833) is provided with a first abutting slope (8332) at one end facing the second pusher (82), and the second abutting rib (823) is provided with a second abutting slope (8231) at one end facing the second auxiliary member (83). The first abutting slope (8332) is inclined from the outside to the inside along a first direction. During the process of the first abutting rib (833) pushing the second abutting rib (823) to move along the first direction, the first abutting inclined surface (8332) and the second abutting inclined surface (8231) abut against each other.

29. The injector according to claim 25, characterized in that, The third through hole (317) is provided with a first reset guide rib (3172) and a second reset guide rib (3173). During the first triggering of the injection after the new container (1) is loaded, the first reset guide rib (3172) is used to guide the first abutment rib (833) to recover its deformation outward, and the second reset guide rib (3173) is used to guide the second abutment rib (823) to recover its deformation inward.

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