Device for providing needle hiding and needle head puncture-proof protection after injection and pre-filled syringe

Abstract

The invention relates to the technical field of pre-filled medicine bottles, in particular to a device for providing needle hiding and post-injection needle puncture-proof protection and a pre-filled syringe, the device comprises a needle hiding sleeve, a medicine bin shell, a locking sleeve, a medicine bottle support and a locking sleeve ejector rod, and the needle hiding sleeve is arranged in the medicine bin shell; a locking sleeve is arranged above the needle hiding sleeve, a medicine bottle support is arranged in the locking sleeve, and a pre-filled medicine bottle is arranged in the medicine bottle support; the bottom of the locking sleeve and the upper portion of the needle hiding sleeve are mutually embedded, and a locking sleeve ejector rod is arranged above the medicine bottle support. When injection is not carried out, the locking sleeve and the needle hiding sleeve can move freely; after injection is completed, the locking sleeve is locked by the locking sleeve ejector rod, so that the hidden needle in the pre-filled medicine bottle cannot be exposed. No matter whether the device is connected with a host or not, the needle head can be hidden when injection is not carried out, removal of the hidden needle protective cap is not affected, and friendly experience is provided for a user fear of needle fear; after injection, the hidden needle sleeve is locked, the hidden needle is prevented from being exposed, a needle head is prevented from stabbing related personnel, and the use safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of prefilled medicine bottles, and in particular to a device for providing hidden needle and post-injection needle puncture protection and a prefilled syringe. Background Art

[0002] Disposable prefilled syringe vials are the most commonly used packaging materials for medical syringes. They are generally used in mechanical injection pens, but are not commonly used in electronic injection pens. When prefilled vials are packaged in medicine chambers and used as consumables in conjunction with electronic injection pens, in order to prevent the used syringe needles from accidentally injuring the user and causing unnecessary harm, or the medicine chambers that package the prefilled vials from being used twice, it is generally required that the needles be uniformly recycled and destroyed after the injection is completed.

[0003] However, the unified recycling method has a time lag problem, as needles are not destroyed immediately after use. Therefore, exposed needles may injure people. At the same time, a large proportion of patients are afraid of needles when using syringes for self-injection.

[0004] Therefore, there is an urgent need to provide a device and a prefilled syringe that provide hidden needle and post-injection needle puncture protection. Summary of the Invention

[0005] In order to solve the above technical problems existing in the prior art, the present invention provides a device and a prefilled syringe for providing hidden needle and post-injection needle puncture protection.

[0006] To achieve the above object, the technical solution of the present invention is as follows:

[0007] In a first aspect, the present invention provides a device for providing hidden needle and post-injection needle puncture protection, comprising a hidden needle cover, a medicine chamber housing, a locking cover, a medicine bottle holder, and a locking cover ejector rod. The hidden needle cover is disposed within the medicine chamber housing, with the bottom of the hidden needle cover extending out of the medicine chamber housing; the locking cover is disposed above the hidden needle cover, and the medicine bottle holder is disposed within the locking cover, wherein a pre-filled medicine bottle is disposed within the medicine bottle holder; the bottom of the locking cover and the top of the hidden needle cover engage with each other, and the locking cover ejector rod is disposed above the medicine bottle holder;

[0008] Furthermore, when no injection is being performed, the locking sleeve and the hidden needle sleeve can move freely, so that the hidden needle inside the pre-filled medicine bottle can be exposed or hidden;

[0009] After the injection is completed, the locking sleeve ejector rod can lock the locking sleeve so that the hidden needle inside the pre-filled medicine bottle cannot be exposed.

[0010] Furthermore, the lower surface of the locking sleeve is provided with circumferentially uniformly distributed bevel teeth, and the upper surface of the hidden needle sleeve is provided with a sliding limit surface that cooperates with the bevel teeth, and the sliding limit surface has a high point and a low point, and the connecting surface between the high point and the low point is a bevel; a reset element is also provided on the outside of the locking sleeve, and under the action of the reset element, the bevel teeth can rotate with the axial movement of the hidden needle sleeve, and the tooth tip position of the bevel teeth switches between the high point and the low point.

[0011] Furthermore, an active sliding oblique pin is provided inside the medicine chamber shell, and a sliding groove is provided on the side wall of the sliding limit surface above the hidden needle sleeve, and the active sliding oblique pin can be embedded in the sliding groove.

[0012] Furthermore, the reset element is a spring.

[0013] Furthermore, the locking sleeve includes a first circular ring at the bottom and a second circular ring at the top, the outer diameter of the first circular ring is larger than the outer diameter of the second circular ring, and the bevel teeth are provided on the lower surface of the first circular ring;

[0014] The lower surface of the spring abuts against the upper surface of the first ring, and the upper surface of the spring abuts against the medicine bottle holder.

[0015] Furthermore, a plurality of locking strips are provided on the second ring. In an initial state, one of the locking strips corresponds to the locking sleeve top rod in a vertical direction. The width of the locking sleeve top rod is smaller than the spacing between adjacent locking strips.

[0016] After the injection is completed; set the distance between the lower surface of the locking sleeve push rod and the upper surface of one of the locking strips to d1, the distance between the hidden needle inside the prefilled medicine bottle and the lower surface of the hidden needle sleeve to d2, and the tooth tip height of the bevel tooth to d3, then d1<d2, d1<d3.

[0017] Furthermore, the oblique teeth of the locking sleeve correspond to the positions of the locking strip.

[0018] Furthermore, two guide bars are provided on the inner wall of the medicine chamber shell, and a hidden needle sleeve sliding groove is formed between the two guide bars; an automatic injection ejector rod is provided on one side of the hidden needle sleeve, and the automatic injection ejector rod is embedded in the hidden needle sleeve sliding groove.

[0019] Furthermore, a hidden needle sleeve limiting strip is provided on the inner wall of the medicine chamber shell, a step is provided above the hidden needle sleeve, and the upper surface of the hidden needle sleeve limiting strip is used to limit the step.

[0020] Furthermore, an observation window is provided on the medicine chamber shell, and an observation window is also provided on the hidden needle sleeve.

[0021] Furthermore, the device for providing hidden needle and post-injection needle puncture protection also includes a medicine chamber pressure cover, which is provided on the upper end surface of the medicine bottle holder; a buckle is provided on the inner wall above the medicine chamber shell, and the buckle buckles the upper edge of the medicine chamber pressure cover.

[0022] Furthermore, the number of the locking sleeve push rods is 2, and the two locking sleeve push rods are respectively arranged on both sides above the medicine bottle holder.

[0023] Furthermore, the medicine bottle holder includes an upper end plate and a sleeve connected to the end plate, and the sleeve is used to set the pre-filled medicine bottle; a receiving groove is set on the upper side wall of the sleeve, and the locking sleeve top rod is set in the receiving groove.

[0024] Furthermore, a push rod oblique pin insertion hole is provided above the end plate, and the push rod oblique pin insertion hole corresponds to the position of the locking sleeve push rod in the axial direction.

[0025] Furthermore, a downward groove is provided on the upper surface of the locking sleeve push rod, and the inner wall outside the groove is an inclined surface. The main body that cooperates with the device for providing hidden needle and post-injection needle puncture protection is provided with a push rod oblique pin, and the push rod oblique pin is inserted into the groove after passing through the push rod oblique pin insertion hole.

[0026] Furthermore, a limit plate is provided on the lower surface of the end plate extending downward, an opening is provided on the limit plate to avoid the locking sleeve push rod, and a limit rib is provided on the side wall of the opening; limit grooves are provided on both sides of the locking sleeve push rod, and the limit ribs are stuck in the limit grooves.

[0027] Furthermore, two limiting grooves are provided on each side of the locking sleeve push rod, and the two limiting grooves are arranged horizontally.

[0028] Furthermore, a limiting rib is provided on the inner wall of the medicine bin shell, and a limiting groove is provided on the outer edge of the medicine bottle holder, and the limiting rib is inserted into the limiting groove.

[0029] Furthermore, an annular groove is provided on the lower outer wall of the locking sleeve, a buckle is provided on the upper part of the hidden needle sleeve, and the buckle is snapped into the annular groove; a spiral groove is provided on the outer wall of the medicine bottle holder, and a thread is provided on the inner wall of the locking sleeve, and the thread is snapped into the spiral groove;

[0030] A reset element is further sleeved on the outside of the locking sleeve. Under the action of the reset element, the locking sleeve can move axially along with the axial movement of the hidden needle sleeve. The locking sleeve also has rotational movement while moving axially.

[0031] Furthermore, the reset element is a spring, and a spring limiting sleeve is also provided on the outside of the locking sleeve, the upper surface of the spring limiting sleeve abuts the upper edge of the medicine bottle holder, the lower surface of the spring limiting sleeve abuts the top of the spring, and the bottom of the spring abuts the hidden needle sleeve.

[0032] Furthermore, a guide strip is provided on the inner wall of the medicine chamber shell, a guide groove is provided on the hidden needle sleeve, and the guide strip is embedded in the guide groove.

[0033] Furthermore, the device for providing hidden needle and post-injection needle puncture protection further comprises a medicine chamber pressure cover, the medicine chamber pressure cover is provided on the upper end surface of the medicine bottle holder; a buckle is provided on the inner wall above the medicine chamber shell, and the buckle buckles the upper edge of the medicine chamber pressure cover;

[0034] The locking sleeve ejector rod comprises a connecting ring and two ejector blocks, and the two ejector blocks are respectively arranged on both sides above the medicine bottle holder.

[0035] Furthermore, the medicine bottle holder includes an upper end plate and a sleeve connected to the end plate, and the sleeve is used to set the pre-filled medicine bottle; a receiving groove is provided on the upper side wall of the sleeve, and the top block is provided in the receiving groove; each of the receiving grooves is provided with two snap grooves spaced apart upper and lower, and a limiting buckle is provided on the inner side of the top block, and the limiting buckle can be snapped into the snap groove.

[0036] Furthermore, a push rod oblique pin insertion hole is provided above the end plate, and the push rod oblique pin insertion hole corresponds to the position of the push block in the axial direction.

[0037] Furthermore, two spiral bevels are provided above the locking sleeve. In the initial state, the top block corresponds to the top surface of one of the spiral bevels. After the injection is completed, the top block is embedded between the two spiral bevels.

[0038] In a second aspect, the present invention further provides a prefilled syringe comprising the above-mentioned device for providing hidden needle and post-injection needle puncture protection.

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] The present invention provides a device for protecting hidden needles and needles from puncture after injection. The device provides a locking sleeve above the hidden needle sleeve, and the bottom of the locking sleeve and the top of the hidden needle sleeve are interlocked. When not injecting, the locking sleeve and the hidden needle sleeve can move freely, so that the hidden needle inside the prefilled medicine bottle can be exposed or hidden. After the injection is completed, the locking sleeve top rod can lock the locking sleeve, so that the hidden needle inside the prefilled medicine bottle cannot be exposed. Furthermore, the device provided by the present invention can achieve the goal of hiding the needle when not injecting, regardless of whether it is connected to a host, without affecting the removal of the hidden needle protection cap, providing a user-friendly experience for needle-phobic users. After the injection, the hidden needle sleeve is locked to prevent the hidden needle from being exposed, prevent the needle from pricking relevant personnel, improve the safety of use, and prevent the drug chamber from being reused. After the injection, the needle is hidden and protected, avoiding secondary contamination, and improving the biosafety of the drug chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is an axonometric diagram of the first embodiment of the present invention;

[0042] Figure 2 This is an axial exploded view of the first embodiment of the present invention;

[0043] Figure 3 This is an axonometric view of the locking sleeve according to the first embodiment of the present invention;

[0044] Figure 4 This is an axonometric view of the hidden needle sleeve according to the first embodiment of the present invention;

[0045] Figure 5 This is a diagram showing the internal structure of the medicine storage housing according to the first embodiment of the present invention;

[0046] Figure 6 This is an axonometric view of the medicine bottle holder according to the first embodiment of the present invention;

[0047] Figure 7 This is an axonometric view of the medicine bottle capping according to the first embodiment of the present invention;

[0048] Figure 8 This is an axonometric view of the locking sleeve ejector rod of the first embodiment of the present invention;

[0049] Figure 9 This is an axonometric view of the initial state of the first embodiment of the present invention, in which part of the outer wall of the medicine chamber shell is hidden;

[0050] Figure 10 It is a side cross-sectional view of the initial state of the first embodiment of the present invention;

[0051] Figure 11 This is an axonometric view of the second state of the first embodiment of the present invention, in which a portion of the outer wall of the medicine chamber housing is hidden;

[0052] Figure 12This is an axonometric view of the third state of the first embodiment of the present invention, in which part of the outer wall of the medicine chamber shell is hidden;

[0053] Figure 13 This is an axonometric view of the fourth state of the first embodiment of the present invention, in which the medicine chamber shell is hidden;

[0054] Figure 14 This is an axial cross-sectional view of the embodiment 1 of the present invention after being connected to the host and before the inclined pin of the push rod in the host contacts the push rod of the locking sleeve;

[0055] Figure 15 This is an axial cross-sectional view of the embodiment 1 of the present invention after it is connected to the host, with the inclined pin of the push rod in the host contacting with the push rod of the locking sleeve;

[0056] Figure 16 This is a cross-sectional structural diagram of the locking sleeve push rod in the first position in the first embodiment of the present invention;

[0057] Figure 17 This is a cross-sectional structural diagram of the locking sleeve push rod in the first position in the first embodiment of the present invention;

[0058] Figure 18 This is an axonometric view of the fifth state of the first embodiment of the present invention, in which a portion of the outer wall of the medicine chamber housing is hidden;

[0059] Figure 19 This is an axonometric view of the sixth state of the first embodiment of the present invention, in which a portion of the outer wall of the medicine chamber housing is hidden;

[0060] Figure 20 This is an axonometric view of the second embodiment of the present invention;

[0061] Figure 21 This is an axonometric view of a locking sleeve according to a second embodiment of the present invention;

[0062] Figure 22 This is an axonometric view of the hidden needle sleeve according to the second embodiment of the present invention;

[0063] Figure 23 This is a diagram showing the internal structure of the medicine bin housing according to the second embodiment of the present invention;

[0064] Figure 24 This is an axonometric view of a medicine bottle holder according to a second embodiment of the present invention;

[0065] Figure 25 This is an axonometric view of the locking sleeve ejector rod of the second embodiment of the present invention;

[0066] Figure 26 This is an axonometric view of the initial state of the second embodiment of the present invention, in which the medicine chamber housing and the spring limiting sleeve are hidden;

[0067] Figure 27This is an axonometric view of the second state of the second embodiment of the present invention, in which the medicine chamber housing and the spring limiting sleeve are hidden;

[0068] Figure 28 This is an axonometric view of the third state of the second embodiment of the present invention, in which the medicine chamber housing and the spring limiting sleeve are hidden;

[0069] Figure 29 This is an axonometric view of the fourth state of the second embodiment of the present invention, in which the medicine chamber housing and the spring limiting sleeve are hidden;

[0070] Figure 30 This is an axial exploded view of the second embodiment of the present invention.

[0071] Reference numerals:

[0072] 1. Hidden needle sleeve, 101. Sliding limit surface, 102. Slide groove, 103. Automatic injection ejector, 104. Buckle, 105. Guide groove;

[0073] 2. Medicine chamber housing, 201. Active sliding oblique pin, 202. Guide bar, 203. Hidden needle sleeve sliding groove, 204. Hidden needle sleeve limiting strip, 205. Observation window, 206. Buckle, 207. Limiting rib;

[0074] 3. Locking sleeve, 301. Bevel teeth, 302. Locking strip, 303. Annular groove, 304. Thread, 305. Spiral bevel, 3511. Bottom surface, 3512. Top surface;

[0075] 4. Medicine bottle holder, 401. End plate, 402. Sleeve, 403. Accommodation groove, 404. Push rod oblique pin insertion hole, 405. Limiting rib, 406. Limiting groove, 407. Spiral groove, 408. Buckle groove,

[0076] 5. Spring,

[0077] 6. Locking sleeve push rod, 601, groove, 602, inclined surface, 603, limit groove, 604, top block, 605, limit buckle,

[0078] 7. Medicine chamber pressure cover, 701. Movable groove, 702. Mounting surface, 703. Push rod insertion hole, 704. Push rod oblique pin insertion hole;

[0079] 8. Pre-filled medicine bottles,

[0080] 9. Push rod, 10. Push rod oblique pin, 11. Spring limit sleeve. DETAILED DESCRIPTION

[0081] The technical solution of the present invention will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are not all embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0082] It should be noted that, unless otherwise specifically stated, the relative arrangements of components and steps, and numerical expressions set forth in these embodiments should not be construed as limiting the scope of the present invention.

[0083] The following description of exemplary embodiments is merely illustrative and is not intended to limit the present invention, its application, or use in any sense. Technologies, methods, and apparatus known to those skilled in the art may not be discussed in detail herein, but to the extent applicable, such technologies, methods, and apparatuses should be considered part of this specification.

[0084] Example 1

[0085] This embodiment provides a device for providing hidden needle and post-injection needle puncture protection, such as Figure 1 and Figure 2 As shown, it includes a hidden needle sleeve 1, a medicine chamber shell 2, a locking sleeve 3, a medicine bottle holder 4, a locking sleeve push rod 6, a medicine chamber pressure cover 7, and a reset element. The medicine chamber shell 2 is a structural component with a through hole inside. The hidden needle sleeve 1 is arranged inside the medicine chamber shell 2, and the hidden needle sleeve 1 extends out from the medicine chamber shell 2 below; the locking sleeve 3 is arranged above the hidden needle sleeve 1, and the medicine bottle holder 4 is arranged inside the locking sleeve 3. The medicine bottle holder 4 has a through hole inside, and the inside is used to set a pre-filled medicine bottle 8; the medicine chamber pressure cover 7 is arranged above the medicine bottle holder 4, and the medicine chamber pressure cover 7 is used to compress the pre-filled medicine bottle 8.

[0086] The bottom of the locking sleeve 3 and the top of the hidden needle sleeve 1 are engaged with each other, and the locking sleeve push rod 6 is provided above the medicine bottle holder 4;

[0087] Furthermore, when no injection is being performed, the locking sleeve 3 and the hidden needle sleeve 1 can move freely, so that the hidden needle inside the pre-filled medicine bottle 8 can be exposed or hidden;

[0088] After the injection is completed, the locking sleeve push rod 6 can lock the locking sleeve 3 so that the hidden needle inside the pre-filled medicine bottle 8 cannot be exposed.

[0089] The overall device, which provides hidden needle and post-injection needle protection, is a disposable pharmaceutical packaging material. When not injecting, the hidden needle cover 1 is free to move, allowing for removal of the needle cover, abnormal activation, and needle insertion, which retracts the hidden needle cover 1 to expose the needle, while also completing the needle insertion procedure. After the injection is completed, the locking sleeve 3 is locked, preventing the hidden needle cover 1 from moving freely, preventing the hidden needle inside the prefilled vial 8 from being exposed. This prevents the operator from being pricked by the hidden needle and reduces the risk of the device being reused.

[0090] like Figure 3 The figure shows the structure of the locking sleeve 3. The locking sleeve 3 comprises a first circular ring at the bottom and a second circular ring at the top. The first circular ring has a larger outer diameter than the second circular ring. The lower surface of the first circular ring is provided with beveled teeth 301, all tilted toward the same side. The upper surface of the second circular ring is provided with a plurality of upwardly extending locking bars 302. In this embodiment, there are six locking bars 302 on the second circular ring. Each bar 302 is of the same size and is evenly spaced along the circumference.

[0091] Furthermore, the oblique teeth 301 of the locking sleeve 3 correspond to the positions of the locking strip 302 , that is, the tooth tips of the oblique teeth 301 are almost aligned with the left side wall of the locking strip 302 .

[0092] like Figure 4 The structure of the hidden needle sleeve 1 is shown. The upper surface of the hidden needle sleeve 1 is provided with a sliding stop surface 101 that mates with the beveled teeth 301. The sliding stop surface 101 has high points and low points, and the connecting surface between the high points and the low points is an inclined surface. As a result, the sliding stop surface 101 is a surface with alternating high points and low points, with each low point corresponding to a beveled tooth 301. A sliding groove 102 is also provided on the upper sidewall of the hidden needle sleeve 1. Furthermore, an automatic injection ejector 103 is also provided on the upper sidewall of the hidden needle sleeve 1. This ejector 103 mates with a main unit to activate the automatic injection function in the main unit, which is an electronic injection pen that is compatible with the device for providing hidden needles and post-injection needle protection. An observation window is also provided on the sidewall of the hidden needle sleeve 1 to facilitate observation of the drug injection process within the hidden needle sleeve 1.

[0093] like Figure 5 This is a diagram of the structure of the drug reservoir housing 2. The upper half of the housing 2 is annular, while the inner diameter of the lower half gradually decreases to match the outer diameter of the hidden needle sleeve 1. Two guide bars 202 are provided on the inner wall of the housing 2, with a hidden needle sleeve sliding groove 203 formed between them. The automatic injection ejector rod 103 of the hidden needle sleeve 1 is embedded in the hidden needle sleeve sliding groove 203. Therefore, while the hidden needle sleeve 1 can freely move up and down, the automatic injection ejector rod 103 is confined within the hidden needle sleeve sliding groove 203, so the hidden needle sleeve 1 can only move axially along the housing 2 and cannot rotate.

[0094] An active sliding oblique pin 201 is also provided on the inner wall of the drug reservoir housing 2. The active sliding oblique pin 201 can be inserted into the sliding groove 102 of the hidden needle sleeve 1. When not injecting, the upper surface of the active sliding oblique pin 201 abuts the inclined surface of the beveled teeth 301 of the locking sleeve 3, and the side surface of the active sliding oblique pin 201 abuts the approximately vertical surface of the beveled teeth 301 of the locking sleeve 3.

[0095] In this embodiment, three active sliding oblique pins 201 are provided along the circumferential direction, and the three active sliding oblique pins 201 are evenly distributed.

[0096] A plurality of hidden needle sheath retaining strips 204 are further provided on the inner wall of the medicine chamber housing 2. The plurality of hidden needle sheath retaining strips 204 are arranged along the circumference of the medicine chamber housing 2. The outer diameter of the upper portion of the hidden needle sheath 1 is larger than the outer diameter of the lower portion, forming a step. The upper surface of the hidden needle sheath retaining strips 204 is used to retain the step, thereby preventing the hidden needle sheath 1 from falling out from the bottom of the medicine chamber housing 2.

[0097] An observation window 205 is also provided on the medicine chamber housing 2. The observation window 205 on the medicine chamber housing 2 corresponds to the observation window on the hidden needle sleeve 1. Therefore, the pre-filled medicine bottle 8 inside can be directly observed through the observation window.

[0098] A buckle 206 is provided on the inner wall above the medicine bin housing 2 , and the buckle 206 buckles the upper edge of the medicine bin pressure cover 7 so that the medicine bin pressure cover 7 is tightly mounted on the medicine bin housing 2 .

[0099] like Figure 6 The diagram shows the structure of the medicine bottle holder 4. The medicine bottle holder 4 includes an upper end plate 401 and a sleeve 402 connected to the end plate 401. The sleeve 402 is used to accommodate a pre-filled medicine bottle 8. The upper side wall of the sleeve 402 is provided with a receiving groove 403, and the locking sleeve ejector rod 6 is disposed in the receiving groove 403. There are two locking sleeve ejector rods 6, one on each side of the upper side of the medicine bottle holder 4.

[0100] A push rod oblique pin insertion hole 404 is provided above the end plate 401, axially corresponding to the locking sleeve push rod 6. The main unit connected to the device of this embodiment includes a push rod 9, flanked by oblique push rod pins 10. During injection, the push rod 9 is inserted into the central through-hole of the vial holder 4 to push the liquid medicine in the prefilled vial 8. The push rod pins 10 are inserted into the push rod oblique pin insertion hole 404 to lock the locking sleeve 3.

[0101] A side of the end plate 401 is provided with an escape groove to clear the automatic injection ejector rod 103 of the hidden needle sleeve. Furthermore, a limit groove is provided on the edge of the end plate 401, which cooperates with the limit ribs on the inner wall of the medicine chamber shell to limit the rotation of the medicine bottle holder. Two bumps are also provided on the upper surface of the end plate 401. A cover plate is provided above the prefilled medicine bottle 8. The cover plate has two flat sides and is embedded between the two bumps to limit the rotation of the prefilled medicine bottle 8. The cover plate of the prefilled medicine bottle 8 is covered by the medicine chamber pressure cap 7 to secure the prefilled medicine bottle 8.

[0102] A limit plate is provided on the lower surface of the end plate 401 and extends downward. An opening is provided on the limit plate to avoid the locking sleeve push rod 6 .

[0103] like Figure 7 The figure shows the structure of the medicine chamber pressure cover 7. The center of the medicine chamber pressure cover 7 has a push rod insertion hole 703 for inserting the push rod 9; push rod oblique pin insertion holes 704 are set on both sides of the push rod insertion hole 703. The push rod oblique pin insertion holes 704 of the medicine chamber pressure cover 7 correspond to the push rod oblique pin insertion holes 404 of the medicine bottle holder 4, and both are used for inserting the push rod oblique pin 10.

[0104] A movable groove 701 is also provided on one side of the medicine chamber pressure cover 7 for avoiding the automatic injection ejector rod 103 of the hidden needle sleeve 1. The outer edge of the medicine chamber pressure cover 7 has a step, and the step surface is the mounting surface 702. The buckle 206 of the medicine chamber shell 2 buckles the mounting surface 702, thereby realizing the assembly of the medicine chamber pressure cover 7.

[0105] like Figure 8 The figure shows the structure of the locking sleeve push rod 6. A downward groove 601 is provided on the upper surface of the locking sleeve push rod 6. The inner wall outside the groove 601 is a slope 602. The push rod inclined pin 10 is inserted into the groove 601 after passing through the push rod inclined pin insertion hole 704 of the medicine chamber pressure cover 7 and the push rod inclined pin insertion hole 404 of the medicine bottle holder 4 in sequence, and the lower surface of the push rod inclined pin 10 squeezes the slope 602 to move the locking sleeve push rod 6 outward.

[0106] Limiting ribs 405 are provided on the sidewalls of the opening of the medicine bottle holder 4; limiting grooves 603 are provided on both sides of the locking sleeve push rod 6. The limiting ribs 405 are snapped into the limiting grooves 603 to limit the locking sleeve push rod 6. Two limiting grooves 603 are provided on each side of the locking sleeve push rod 6, and the two limiting grooves 603 are arranged horizontally. The two limiting grooves 603 correspond to the two position states of the locking sleeve push rod 6:

[0107] Position 1: The limiting rib 405 is inserted into the limiting groove 603 on the outer side of the locking sleeve push rod 6;

[0108] Position 2: The limiting rib 405 is inserted into the limiting groove 603 on the inner side of the locking sleeve push rod 6;

[0109] The inner side and the outer side are respectively based on the radial direction of the medicine bottle holder 4 , the inner side is close to the central axis of the medicine bottle holder 4 , and the outer side is far from the central axis of the medicine bottle holder 4 .

[0110] The lower part of the locking sleeve top rod 6 is a rod-shaped structure, such as Figure 9 The figure shows the initial state of the device of this embodiment when it is not in use. At this time, one of the locking strips 302 of the locking sleeve 3 corresponds to the locking sleeve push rod 6 in upper and lower positions; and the width of the locking sleeve push rod 6 is smaller than the distance between adjacent locking strips 302.

[0111] The beveled teeth 301 of the locking sleeve 3 are caught on the active sliding beveled pin 201, which is embedded in the sliding groove 102 of the hidden needle sleeve 1. The beveled teeth 301 abut against the sliding limit surface 101 of the hidden needle sleeve 1, but the tooth tips of the beveled teeth 301 are not at the lowest point of the sliding limit surface 101. However, due to the restraint of the active sliding beveled pin 201, the locking sleeve 3 and the hidden needle sleeve 1 are in a stable state.

[0112] A reset element is further sleeved on the outside of the locking sleeve 3. Under the action of the reset element, the bevel teeth 301 can rotate along with the axial movement of the hidden needle sleeve 1, and the tooth tip position of the bevel teeth 301 switches between the high point and the low point.

[0113] The reset element is preferably a spring 5. The lower surface of the spring 5 abuts against the upper surface of the first ring, and the upper surface of the spring 5 abuts against the medicine bottle holder 4.

[0114] like Figure 10 The figure shows the internal structure of the device in the initial state. The outer wall of the rod-shaped structure below the locking sleeve push rod 6 is flush with the outer wall of the medicine bottle holder 4. At this time, the hidden needle sleeve 1 is pushed upward from the lower surface. When the tooth tip of the inclined tooth 301 of the locking sleeve 3 is just higher than the active sliding inclined pin 201, the initial state is switched to the second state. Figure 11 shown.

[0115] Figure 11 In the second state shown, due to the rebound effect of the spring 5, the locking sleeve 3 is prompted to move downward, and the tooth tip of the bevel tooth 301 abuts the sliding limit surface 101 of the hidden needle sleeve 1, and the tooth tip is not located at the low point of the sliding limit surface 101. Therefore, the tooth tip tends to move toward the low point, and the locking sleeve 3 moves downward and rotates under the action of the spring.

[0116] After the movement, the second state switches to Figure 12In the third state shown, the tooth tip of the bevel tooth 301 moves to the lowest point of the sliding limit surface 101. However, since the side of the bevel tooth 301 is not blocked by the active sliding bevel pin 201, the locking sleeve 3 still has a tendency to rotate. Therefore, under the action of the spring 5, the locking sleeve 3 continues to rotate until it returns to the Figure 9 The initial state shown is that, when no injection is given, the locking sleeve 3 and the hidden needle sleeve 1 can move freely.

[0117] When the hidden needle sleeve 1 is retracted a large distance in the medicine chamber shell, such as Figure 13 As shown, when the hidden needle sleeve 1 starts to move upward from the initial state, it first switches to Figure 11 The second state shown in FIG. 1 is then continued to move upward, and the tip of the helical tooth 301 moves to the lowest point of the sliding limit surface 101, and then switches to Figure 13 In the fourth state shown, the locking sleeve 3 has rotated a certain angle relative to the initial state. The locking strip 302 of the locking sleeve 3 and the locking sleeve push rod 6 are now offset, and the space between the locking sleeve push rod 6 and the locking strip 302 is aligned. The hidden needle cover 1 continues to move upward, and the locking sleeve push rod 6 is inserted into the space between the locking strips 302. This fully exposes the needle guard, allowing removal of the needle guard.

[0118] If the device of this embodiment is associated with a host, then Figure 9 In the state shown, during injection, the hidden needle cover 1 retracts inward (moves upward) due to the obstruction of the skin, and the automatic injection ejector rod 103 of the hidden needle cover 1 moves upward and extends out of the medicine chamber pressure cover 7, and the automatic injection ejector rod 103 triggers the injection function of the host. Figure 14 The figure shows an axial cross-sectional view of the push rod oblique pin 10 in the main unit before contact with the locking sleeve push rod 6. After the injection function of the main unit is triggered, the push rod 9 starts to move downward, and the push rod oblique pins 10 on both sides of the push rod 9 pass through the push rod oblique pin insertion hole 704 of the medicine chamber pressure cover 7 and the push rod oblique pin insertion hole 404 of the medicine bottle holder 4 in turn, and then are inserted into the groove 601 of the locking sleeve push rod 6.

[0119] like Figure 15 As shown, the push rod oblique pin 10 continues to descend, and the lower surface of the push rod oblique pin 10 is an inclined surface that cooperates with the inclined surface 602 of the locking sleeve push rod 6. The inclined surface of the push rod oblique pin 10 pushes the locking sleeve push rod 6 outward, causing the locking sleeve push rod 6 to move outward, so that the locking sleeve push rod 6 moves from position one to position two.

[0120] like Figure 16 The cross-sectional structure diagram at position 1 is shown as follows: Figure 17The figure shows the cross-sectional structure at position 2. When the locking sleeve push rod 6 is in position 1, the limiting rib 405 of the medicine bottle holder 4 is located in the limiting groove 603 on the outer side of the locking sleeve push rod 6. As the locking sleeve push rod 6 moves outward, the limiting rib 405 of the medicine bottle holder 4 gradually moves into the limiting groove 603 on the inner side of the locking sleeve push rod 6.

[0121] When the locking sleeve push rod 6 moves outward to position 2, the locking sleeve push rod 6 protrudes relative to the outer wall of the medicine bottle holder 4. During the outward movement of the locking sleeve push rod 6, the push rod 9 pushes the medicine liquid downward to complete the injection process.

[0122] After the injection is completed, the device of this embodiment is pulled out, and the needle is exposed. At the same time, the locking sleeve 3 moves downward under the action of the spring 5, switching to Figure 18 In the fifth state shown, as the locking sleeve 3 continues to move, the relative positions of the locking sleeve 3 and the hidden needle sleeve 1 are restored to Figure 9 However, the position of the locking sleeve push rod 6 has changed at this time. It slides outward from the receiving groove 403 of the medicine bottle holder 4, so that the lower surface of the locking sleeve push rod 6 is arranged opposite to the locking strip 302 of the locking sleeve 3, and the locking sleeve 3 is switched to the stable state shown in FIG. Figure 19 The sixth state is shown.

[0123] Moreover, the relative positions of the locking sleeve 3 and the hidden needle sleeve 1 are restored to Figure 9 After reaching the stable state shown, the hidden needle cover 1 conceals the hidden needle. Meanwhile, if the hidden needle cover 1 is further pressed upward, the locking cover 3 is blocked by the locking cover push rod 6, so that the tips of the bevel teeth 301 of the locking cover 3 cannot be higher than the active sliding bevel pin 201. Therefore, the locking cover 3 cannot move further upward or rotate. It can be considered that the hidden needle cover 1 and the locking cover 3 are in a locked state at this time, providing effective anti-puncture protection for the needle.

[0124] In addition, after the injection is completed, the distance between the lower surface of the locking sleeve push rod 6 and the upper surface of one of the locking strips 302 is set to d1, the distance between the hidden needle inside the prefilled medicine bottle 8 and the lower surface of the hidden needle sleeve 1 is set to d2, and the tooth tip height of the bevel tooth 301 is set to d3, then d1<d2, d1<d3.

[0125] Example 2

[0126] This embodiment provides a device for providing hidden needle and post-injection needle puncture protection, such as Figure 20 and Figure 30As shown, it includes a hidden needle sleeve 1, a medicine chamber shell 2, a locking sleeve 3, a medicine bottle holder 4, a locking sleeve push rod 6, a medicine chamber pressure cover 7, and a reset element. The medicine chamber shell 2 is a structural component with a through hole inside. The hidden needle sleeve 1 is arranged inside the medicine chamber shell 2, and the hidden needle sleeve 1 extends out from the medicine chamber shell 2 below; the locking sleeve 3 is arranged above the hidden needle sleeve 1, and the medicine bottle holder 4 is arranged inside the locking sleeve 3. The medicine bottle holder 4 has a through hole inside, and the inside is used to set a pre-filled medicine bottle 8; the medicine chamber pressure cover 7 is arranged above the medicine bottle holder 4, and the medicine chamber pressure cover 7 is used to compress the pre-filled medicine bottle 8.

[0127] The bottom of the locking sleeve 3 and the top of the hidden needle sleeve 1 are engaged with each other, and the locking sleeve push rod 6 is provided above the medicine bottle holder 4;

[0128] Furthermore, when no injection is being performed, the locking sleeve 3 and the hidden needle sleeve 1 can move freely, so that the hidden needle inside the pre-filled medicine bottle 8 can be exposed or hidden;

[0129] After the injection is completed, the locking sleeve push rod 6 can lock the locking sleeve 3 so that the hidden needle inside the pre-filled medicine bottle 8 cannot be exposed.

[0130] The overall device, which provides hidden needle and post-injection needle protection, is a disposable pharmaceutical packaging material. When not injecting, the hidden needle cover 1 is free to move, allowing for removal of the needle cover, abnormal activation, and needle insertion, which retracts the hidden needle cover 1 to expose the needle, while also completing the needle insertion procedure. After the injection is completed, the locking sleeve 3 is locked, preventing the hidden needle cover 1 from moving freely, preventing the hidden needle inside the prefilled vial 8 from being exposed. This prevents the operator from being pricked by the hidden needle and reduces the risk of the device being reused.

[0131] like Figure 21 The figure shows the structure of the locking sleeve 3. The locking sleeve 3 is cylindrical in shape, with an annular groove 303 provided on the lower outer wall of the locking sleeve 3. A spiral slope 305 is provided on the upper surface of the locking sleeve 3. In this embodiment, two spiral slopes 305 are provided, each having a bottom surface 3511 and a top surface 3512. Furthermore, a thread 304 is provided on the inner wall of the locking sleeve 3. The spiral direction of the thread 304 is the same as that of the spiral slope 305.

[0132] like Figure 22 The structure of the hidden needle cover 1 is shown. A buckle 104 is provided on the top of the hidden needle cover 1, and the buckle 104 is snapped into the annular groove 303. An automatic injection ejector rod 103 is also provided on the top of the hidden needle cover 1. The automatic injection ejector rod 103 cooperates with a host to activate the automatic injection function of the host. The host is an electronic injection pen that cooperates with the device for providing hidden needle and post-injection needle puncture protection of this embodiment.

[0133] In addition, a guide groove 105 is provided on the upper edge of the hidden needle sleeve 1 for cooperating with the medicine chamber housing 2 .

[0134] like Figure 23 The diagram shows the structure of the drug housing 2. Guide bars 202 are provided on the inner wall of the drug housing 2. These guide bars 202 engage within the guide grooves 105 of the hidden needle shield 1, preventing the hidden needle shield 1 from rotating relative to the drug housing 2. Therefore, the hidden needle shield 1 can only move axially relative to the drug housing 2. Limiting ribs 207 are also provided on the inner wall of the drug housing 2 to limit the rotation of the drug bottle holder 4.

[0135] In addition, a buckle 206 is provided on the inner wall above the medicine bin housing 2 , and the buckle 206 buckles the upper edge of the medicine bin pressure cover 7 so that the medicine bin pressure cover 7 is tightly mounted on the medicine bin housing 2 .

[0136] like Figure 24 The figure shows the structure of the medicine bottle holder 4. The medicine bottle holder 4 includes an upper end plate 401 and a sleeve 402 connected to the end plate 401. The sleeve 402 is used to set the pre-filled medicine bottle 8; a spiral groove 407 is provided on the outside of the sleeve 402, and the thread 304 on the inner wall of the locking sleeve 3 is inserted into the spiral groove 407, so that the locking sleeve 3 can rotate while moving up and down.

[0137] A limiting groove 406 is provided on the outer edge of the end plate 401 of the medicine bottle holder 4, and the limiting rib 207 of the medicine chamber shell 2 is embedded in the limiting groove 406 on the outer edge of the end plate 401 to limit the rotation of the medicine bottle holder 4. In addition, a push rod oblique pin insertion hole 404 is also provided on the end plate 401. The push rod oblique pin insertion hole 404 corresponds to the position of the locking sleeve push rod 6 in the axial direction, specifically corresponds to the position of the top block 604 of the locking sleeve push rod 6. The main unit connected to the device of this embodiment has a push rod 9, and push rod oblique pins 10 are provided on both sides of the push rod 9. During injection, the push rod 9 is inserted into the through hole in the center of the medicine bottle holder 4 to push the liquid medicine in the pre-filled medicine bottle 8. The push rod oblique pin 10 is inserted into the push rod oblique pin insertion hole 404 to lock the locking sleeve 3.

[0138] A clearance hole is also provided on one side of the end plate 401 to allow the automatic injection ejector rod 103 of the hidden needle sleeve 1 to pass through. Two bumps are also provided on the upper surface of the end plate 401. A cover plate with flat sides is positioned above the prefilled medicine bottle 8. The cover plate is embedded between the two bumps to restrict the rotation of the prefilled medicine bottle 8. A medicine chamber pressure cap 7 is placed above the cover plate of the prefilled medicine bottle 8 to secure the prefilled medicine bottle 8.

[0139] like Figure 25 The figure shows the structure of the locking sleeve push rod 6 , which includes a connecting ring and two push blocks 604 . The two push blocks 604 are respectively arranged on both sides above the medicine bottle holder 4 .

[0140] A receiving groove 403 is provided on the upper side wall of the sleeve 402 of the medicine bottle holder 4, and the top block 604 is provided in the receiving groove 403; two snap grooves 408 spaced apart from each other are provided on each of the receiving grooves 403, and a limiting buckle 605 is provided on the inner side of the top block 604, and the limiting buckle 605 can be snapped into the snap groove 408.

[0141] A reset element is further sleeved on the outside of the locking sleeve 3. Under the action of the reset element, the locking sleeve 3 can move axially along with the axial movement of the hidden needle sleeve 1. The locking sleeve 3 also has rotational movement while moving axially.

[0142] The reset element is a spring 5. A spring retaining sleeve 11 is also provided on the exterior of the locking sleeve 3. The upper surface of the spring retaining sleeve 11 abuts the upper edge of the medicine bottle holder 4, while the lower surface of the spring retaining sleeve 11 abuts the upper portion of the spring 5. The lower portion of the spring 5 abuts the hidden needle sleeve 1. Furthermore, the lower surface of the spring retaining sleeve 11 abuts the upper surface of the guide bar 202 of the medicine chamber housing 2, thereby confining the spring retaining sleeve 11 between the guide bar 202 and the end plate 401 of the medicine bottle holder 4.

[0143] The medicine bin pressure cover 7 in this embodiment has the same structure as the medicine bin pressure cover 7 in the first embodiment, and the connection between the medicine bin pressure cover 7 and the medicine bin housing 2 is also the same.

[0144] like Figure 26 As shown, in the initial state, the top block 604 corresponds to the top surface 3512 of one of the spiral slopes 305; at this time, the limit buckle 605 of the top block 604 is locked into the upper buckle groove 408. That is, the position of the top block 604 at this time is called position 1. In addition, in the initial state, the hidden needle is hidden inside the hidden needle cover 1.

[0145] When the hidden needle sleeve 1 is pushed upward from the lower surface of the hidden needle sleeve 1, the hidden needle sleeve 1 moves axially under the limitation of the drug chamber shell 2, and the locking sleeve 3 makes a spiral movement due to the cooperation between the thread 304 and the spiral groove 407. Therefore, the device of this embodiment switches from the initial state to the Figure 27 In the second state shown, after the hidden needle cover 1 rises a certain distance, the hidden needle is exposed. At this time, the needle protection cover of the hidden needle can be removed.

[0146] When the hidden needle sleeve 1 is released, the spring 5 squeezes the locking sleeve 3 downward, the locking sleeve 3 spirals downward, and the hidden needle sleeve 1 moves axially downward, and the locking sleeve 3 and the hidden needle sleeve 1 return to the original position. Figure 26 As shown in the state, in the non-injection state, the hidden needle sleeve 1 can move freely, including abnormal touches, etc., which will not cause the hidden needle sleeve 1 and the locking sleeve 3 to be locked.

[0147] When the device of this embodiment is connected to the host and injection is performed, the hidden needle sleeve 1 moves upward relative to the hidden needle under the obstruction of the skin. When the automatic injection push rod 103 triggers the automatic injection function of the host, the push rod 9 starts to move downward. The push rod oblique pins 10 on both sides of the push rod 9 pass through the push rod oblique pin insertion holes 704 of the medicine chamber pressure cover 7 and the push rod oblique pin insertion holes 404 of the medicine bottle holder 4 in sequence, and then contact the top block 604 of the locking sleeve push rod 6.

[0148] The push rod 9 continues to move downward, and the push rod oblique pin 10 pushes the top block 604, causing the locking sleeve push rod 6 to move downward. The limit buckle 605 of the top block 604 disengages from the upper buckle groove 408 and moves downward along the receiving groove 403 until the limit buckle 605 is snapped into the lower buckle groove 408. The position of the top block 604 at this time is called position 2, i.e. Figure 28 The third state is shown. Furthermore, the top block 604 is embedded between the two spiral inclined surfaces 305 and is arranged opposite to the bottom surface 3511. At this time, the injection is completed.

[0149] After the needle is removed, the locking sleeve 3 is reset by the spring 5, and the reset locking sleeve 3 rotates to Figure 29 In the state shown, at this time, the top surface 3512 of the spiral slope 305 is arranged opposite to the top block 604. If the hidden needle sleeve 1 is pushed upward, the hidden needle sleeve 1 and the locking sleeve 3 cannot move upward due to the obstruction of the top block 604, thereby achieving the locking of the locking sleeve 3 and the hidden needle sleeve 1, which can effectively protect the needle from puncture.

[0150] Example 3

[0151] This embodiment provides a prefilled syringe, including the device for providing hidden needle and post-injection needle puncture protection provided in the first or second embodiment.

[0152] The above specific embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to examples, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A device for providing hidden needle and post-injection needle puncture protection, characterized in that: It includes a hidden needle sleeve, a medicine chamber shell, a locking sleeve, a medicine bottle holder, and a locking sleeve push rod. The hidden needle sleeve is arranged inside the medicine chamber shell, and the bottom of the hidden needle sleeve extends out of the medicine chamber shell; the locking sleeve is arranged above the hidden needle sleeve, and the medicine bottle holder is arranged inside the locking sleeve. The interior of the medicine bottle holder is used to place a pre-filled medicine bottle; the bottom of the locking sleeve and the top of the hidden needle sleeve are interlocked with each other, and the locking sleeve push rod is arranged above the medicine bottle holder; Furthermore, when no injection is being performed, the locking sleeve and the hidden needle sleeve can move freely, so that the hidden needle inside the pre-filled medicine bottle can be exposed or hidden; After the injection is completed, the locking sleeve ejector rod can lock the locking sleeve so that the hidden needle inside the pre-filled medicine bottle cannot be exposed.

2. The device for providing hidden needle and post-injection needle puncture protection according to claim 1, characterized in that: The lower surface of the locking sleeve is provided with circumferentially evenly distributed oblique teeth, and the upper surface of the hidden needle sleeve is provided with a sliding limit surface that cooperates with the oblique teeth, and the sliding limit surface has a high point and a low point, and the connecting surface between the high point and the low point is an inclined surface; a reset element is also sleeved on the outside of the locking sleeve, and under the action of the reset element, the oblique teeth can rotate with the axial movement of the hidden needle sleeve, and the tooth tip position of the oblique teeth switches between the high point and the low point.

3. The device for providing hidden needle and post-injection needle puncture protection according to claim 2, characterized in that: An active sliding oblique pin is arranged inside the medicine chamber shell, and a sliding groove is arranged on the side wall of the sliding limit surface above the hidden needle sleeve, and the active sliding oblique pin can be embedded in the sliding groove.

4. The device for providing hidden needle and post-injection needle puncture protection according to claim 2, characterized in that: The reset element is a spring; The locking sleeve includes a first circular ring at the bottom and a second circular ring at the top, the outer diameter of the first circular ring is larger than the outer diameter of the second circular ring, and the helical teeth are provided on the lower surface of the first circular ring; The lower surface of the spring abuts against the upper surface of the first ring, and the upper surface of the spring abuts against the medicine bottle holder.

5. The device for providing hidden needle and post-injection needle puncture protection according to claim 4, characterized in that: A plurality of locking strips are provided on the second ring. In an initial state, one of the locking strips corresponds to the top rod of the locking sleeve above and below. The width of the top rod of the locking sleeve is smaller than the spacing between adjacent locking strips. After the injection is completed; set the distance between the lower surface of the locking sleeve push rod and the upper surface of one of the locking strips to d1, the distance between the hidden needle inside the prefilled medicine bottle and the lower surface of the hidden needle sleeve to d2, and the tooth tip height of the bevel tooth to d3, then d1<d2, d1<d3.

6. The device for providing hidden needle and post-injection needle puncture protection according to claim 1, characterized in that: Two guide bars are arranged on the inner wall of the medicine chamber shell, and a hidden needle sleeve sliding groove is formed between the two guide bars; an automatic injection ejector rod is arranged on one side of the hidden needle sleeve, and the automatic injection ejector rod is embedded in the hidden needle sleeve sliding groove.

7. The device for providing hidden needle and post-injection needle puncture protection according to claim 1, characterized in that: A hidden needle sleeve limiting strip is further provided on the inner wall of the medicine chamber shell, and a step is provided above the hidden needle sleeve. The upper surface of the hidden needle sleeve limiting strip is used to limit the step.

8. The device for providing hidden needle and post-injection needle puncture protection according to claim 1, characterized in that: The device for providing hidden needle and post-injection needle puncture protection also includes a medicine chamber pressure cover, which is provided on the upper end surface of the medicine bottle holder; a buckle is provided on the inner wall above the medicine chamber shell, and the buckle buckles the upper edge of the medicine chamber pressure cover.

9. The device for providing hidden needle and post-injection needle puncture protection according to claim 1, characterized in that: The number of the locking sleeve push rods is 2, and the two locking sleeve push rods are respectively arranged on both sides above the medicine bottle holder; The medicine bottle holder includes an upper end plate and a sleeve connected to the end plate, and the sleeve is used to set the pre-filled medicine bottle; a receiving groove is set on the upper side wall of the sleeve, and the locking sleeve ejector rod is set in the receiving groove.

10. The device for providing hidden needle and post-injection needle puncture protection according to claim 9, characterized in that: A push rod oblique pin insertion hole is provided above the end plate, and the push rod oblique pin insertion hole corresponds to the position of the locking sleeve push rod in the axial direction; A downward groove is provided on the upper surface of the locking sleeve push rod, and the inner wall outside the groove is an inclined surface. The main body that cooperates with the device for providing hidden needle and anti-puncture protection of the needle after injection is provided with a push rod oblique pin, and the push rod oblique pin is inserted into the groove after passing through the push rod oblique pin insertion hole.

11. The device for providing hidden needle and post-injection needle puncture protection according to claim 9, characterized in that: A limit plate is provided on the lower surface of the end plate, extending downwardly, and an opening is provided on the limit plate to avoid the locking sleeve push rod, and a limit rib is provided on the side wall of the opening; limit grooves are provided on both sides of the locking sleeve push rod, and the limit ribs are clamped into the limit grooves; Two limiting grooves are arranged on each side of the locking sleeve push rod, and the two limiting grooves are arranged horizontally.

12. The device for providing hidden needle and post-injection needle puncture protection according to claim 1, characterized in that: An annular groove is provided on the lower outer wall of the locking sleeve, a buckle is provided on the upper part of the hidden needle sleeve, and the buckle is snapped into the annular groove; a spiral groove is provided on the outer wall of the medicine bottle holder, and a thread is provided on the inner wall of the locking sleeve, and the thread is snapped into the spiral groove; A reset element is further sleeved on the outside of the locking sleeve. Under the action of the reset element, the locking sleeve can move axially along with the axial movement of the hidden needle sleeve. The locking sleeve also has rotational movement while moving axially.

13. The device for providing hidden needle and post-injection needle puncture protection according to claim 12, characterized in that: The reset element is a spring, and a spring limiting sleeve is further provided on the outside of the locking sleeve. The upper surface of the spring limiting sleeve abuts the upper edge of the medicine bottle holder, the lower surface of the spring limiting sleeve abuts the upper part of the spring, and the lower part of the spring abuts the hidden needle sleeve.

14. The device for providing hidden needle and post-injection needle puncture protection according to claim 12, characterized in that: The device for providing hidden needle and post-injection needle puncture protection also includes a medicine chamber pressure cover, which is provided on the upper end surface of the medicine bottle holder; a buckle is provided on the inner wall above the medicine chamber shell, and the buckle buckles the upper edge of the medicine chamber pressure cover; The locking sleeve ejector rod comprises a connecting ring and two ejector blocks, and the two ejector blocks are respectively arranged on both sides above the medicine bottle holder.

15. The device for providing hidden needle and post-injection needle puncture protection according to claim 14, characterized in that: The medicine bottle holder includes an upper end plate and a sleeve connected to the end plate, and the sleeve is used to place a pre-filled medicine bottle; a receiving groove is provided on the upper side wall of the sleeve, and the top block is provided in the receiving groove; each of the receiving grooves is provided with two snap grooves spaced apart upper and lower, and a limiting buckle is provided on the inner side of the top block, and the limiting buckle can be snapped into the snap groove.

16. The device for providing hidden needle and post-injection needle puncture protection according to claim 15, characterized in that: A push rod oblique pin insertion hole is provided above the end plate, and the push rod oblique pin insertion hole corresponds to the position of the top block in the axial direction.

17. The device for providing hidden needle and post-injection needle puncture protection according to claim 16, characterized in that: Two spiral bevels are provided above the locking sleeve. In the initial state, the top block corresponds to the top surface of one of the spiral bevels. After the injection is completed, the top block is embedded between the two spiral bevels.

18. A prefilled syringe, characterized in that: The device comprises the device for providing hidden needle and post-injection needle puncture protection as described in any one of claims 1-17.

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