Energy storage automatic injection device

Abstract

The utility model relates to injection device field, concretely is a kind of energy storage type automatic injection device, device includes shell, energy storage type injection assembly, transmission locking assembly and pre-filled injection medicine bottle;Energy storage type injection assembly is set in transmission locking assembly inside, transmission locking assembly is used to lock and release the energy storage type injection assembly;Energy storage type injection assembly after release triggers pre-filled injection medicine bottle to realize automatic injection.The injection trigger of the utility model is driven by built-in energy storage part, without the external force exerted by patient, and provides stable and reliable injection power, and injection effect is more scientific and reliable.Process of use is more convenient and efficient, very suitable for self-medication at home, reduces the ability training and complex use scene of patient use.

Description

Technical Field

[0001] This utility model relates to the field of injection devices, specifically an energy storage type automatic injection device. Background Technology

[0002] In the medical field, syringes are one of the most commonly used medical devices, but traditional syringes and related technologies have many shortcomings. Currently, the exposed needle of common syringes can cause psychological stress for patients, especially those who have a fear of needles. This psychological burden may affect the smooth execution of the injection procedure.

[0003] Furthermore, traditional syringes lack adequate needle protection after injection, making them prone to accidental injury to healthcare workers or patients due to accidental needle contact. Exposed needles also pose a risk of cross-infection during device disposal.

[0004] To overcome these shortcomings, some syringes with protective devices have appeared on the market. However, the triggering methods of these devices have obvious deficiencies: either they are simple in structure but have low reliability in needle protection, or they require a laborious trigger switch to activate the protective device; they do not achieve reliable and simple triggering.

[0005] Therefore, there is an urgent need for an energy storage type of automatic injection device. Utility Model Content

[0006] To overcome the problems existing in the prior art, the purpose of this utility model is to provide an energy storage type automatic injection device.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an energy storage type automatic injection device, comprising: a shell, an energy storage injection component, a transmission locking component, a pen cap, and a pre-filled injection vial;

[0008] The outer casing is fitted over the transmission locking assembly, which includes a concealed needle sleeve, a transmission cylinder, and a release ring. One end of the concealed needle sleeve extends out of the top of the outer casing, and the other end of the concealed needle sleeve is sequentially provided with the transmission cylinder and the release ring. The inner wall of the release ring is provided with a first snap-fit ​​rib, and the outer wall of the release ring is provided with a fixed snap-fit ​​groove. The inner wall of the outer casing is provided with a locking rib, and the fixed snap-fit ​​groove snaps into the locking rib.

[0009] The energy storage injection assembly includes an energy storage component, a drive rod, a screw, and a limiting ring. A second snap-fit ​​rib is provided on the side wall of the drive rod. The drive rod is inserted into the release ring, and the first snap-fit ​​rib and the second snap-fit ​​rib are snapped together in the circumferential direction. The limiting ring is connected to the outer shell and is provided with a threaded hole. The drive rod is connected to the energy storage component and the screw. After passing through the threaded hole, the screw abuts against the piston at the tail of the pre-filled injection vial.

[0010] The energy storage injection assembly is housed within a transmission locking assembly, which is used to lock and release the energy storage injection assembly. Specifically, in the initial state, the locking groove on the outer wall of the release ring engages with the locking ribs of the outer shell, restricting the circumferential rotation of the release ring in its initial position. The drive rod of the energy storage injection assembly is inserted into the release ring, and the first and second locking ribs engage circumferentially, further restricting the circumferential rotation of the drive rod. The energy storage component completes energy storage and power accumulation during product assembly. Due to the aforementioned restriction on circumferential rotation, the energy storage component remains in a power-accumulating state when not in use.

[0011] During injection, when the concealed needle sleeve contacts the skin and is pushed into the outer shell, the concealed needle sleeve sequentially drives the transfer cylinder and the release ring to move along the axial direction of the outer shell. When the first retaining rib of the release ring separates from the second retaining rib of the drive rod, the energy storage component on the drive rod is no longer constrained, releasing its stored energy to drive the drive rod to rotate. The drive rod drives the screw at the bottom to rotate, and the limiting ring is in a fixed state relative to the outer shell, thereby causing the screw to rotate and push the piston of the pre-filled injection vial to move, completing the automatic injection action.

[0012] This invention is further configured such that: the energy storage component is a torsion spring, one end of which is connected to a limiting ring, and the other end is connected to a drive rod. The torsion spring drives the drive rod to rotate, thereby causing the screw connected to the drive rod to move axially relative to the limiting ring.

[0013] The present invention is further configured such that: a connecting rib is provided on the inner wall of the bottom end of the drive rod, and a connecting groove is provided on the side wall of the screw, and the screw is connected to the connecting rib on the drive rod through the connecting groove.

[0014] The present invention is further configured such that: the outer wall of the limiting ring is provided with a first buckle, and the side wall of the outer shell is provided with a corresponding first buckle groove, the first buckle engaging with the first buckle groove to fix the limiting ring inside the outer shell.

[0015] The limiting ring is fixed relative to the outer shell. The screw engages with the threaded hole of the limiting ring. The drive rod is driven to rotate by the energy storage component, which causes the screw to rotate and move downward relative to the limiting ring.

[0016] The present invention is further configured such that: the transmission locking assembly includes a double buckle ring, the double buckle ring is disposed at the end of the release ring away from the drive rod, and a connecting ring is disposed inside the double buckle ring; a second buckle is disposed on the outer wall of the release ring, and the double buckle ring is sleeved on the outside of the release ring.

[0017] When the release ring moves axially, the first snap-fit ​​rib of the release ring separates from the second snap-fit ​​rib of the drive rod, the release ring is inserted into the double buckle ring, and the second snap-fit ​​ring engages with the connecting ring, connecting the release ring and the double buckle ring.

[0018] The present invention is further configured such that: the energy storage type automatic injection device also includes a pen cap, the pen cap being installed at the tail end of the outer shell; a second snap-fit ​​groove and a third snap-fit ​​groove are sequentially provided on the side wall of the outer shell at a certain distance from the tail end of the outer shell;

[0019] The outer wall of the double buckle is also provided with an elastic arm, and a third buckle is provided on the elastic arm; in the initial state, the third buckle is engaged with the second buckle groove;

[0020] The transmission locking assembly also includes a spring, one end of which abuts against the release ring and the other end against the pen cap.

[0021] The release ring compresses the spring as it moves axially, storing energy. When the needle sheath moves away from the skin, the spring causes the release ring to reset. Because the release ring inserts into and connects with the double-ring during the needle sheath retraction process, the spring causes the release ring to move downwards simultaneously, disengaging the third latch from the second latch groove and securing it in the third latch groove. The third latch groove restricts the axial movement of the transmission locking assembly backwards, thus preventing the reset needle sheath from retracting back into the outer shell, thereby achieving needle puncture protection.

[0022] The present invention is further configured such that: a lever is also provided on the drive rod, the lever is arranged around the circumference of the drive rod, and the drive rod is sleeved inside the transmission cylinder;

[0023] The inner wall of the transfer cylinder is provided with ratchet teeth, which engage with the lever.

[0024] During the rotation and release process of the drive lever, the lever rotates, deforms, and impacts the ratchet of the transfer cylinder, producing a "tap-tap-tap" injection sound and vibration feedback, interactively reminding the user of the injection progress. When the "tap-tap-tap" sound stops, the user is reminded that the injection progress is complete.

[0025] The present invention is further configured such that: the concealed needle sleeve includes a concealed needle section and a connecting rod section, the concealed needle section extending out of the top of the outer shell; the energy storage automatic injection device also includes a vial support, the vial support being disposed between the limiting ring and the concealed needle sleeve, the vial support being used to fix a pre-filled injection vial; the needle tip of the pre-filled injection vial passes through the vial support and extends into the concealed needle section;

[0026] The side walls of the medicine bottle holder and the limiting ring are provided with clearance grooves. After the connecting rod segment passes through the clearance grooves of the medicine bottle holder and the limiting ring in sequence, it abuts against the transfer cylinder.

[0027] The present invention is further configured such that: the side wall of the outer shell is provided with an observation window, the observation window being located on the outer shell corresponding to the medicine bottle support; the observation window is used to assist in observing whether the piston of the pre-filled injection bottle has moved to the bottom;

[0028] The sidewalls of the medicine bottle holder are made of a hollow structure or transparent material.

[0029] In summary, the beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0030] 1. The injection triggering of this invention is driven by a built-in energy storage device, eliminating the need for external force from the patient and providing stable and reliable injection power, resulting in a more scientific and reliable injection effect. The two-step injection action is convenient and efficient, making it ideal for home self-administration and reducing the need for patient training and complex usage scenarios.

[0031] 2. In this invention, the injection needle is concealed within the protective sleeve during and after the injection process, which reduces the psychological impact of the needle on the patient and enhances the effectiveness of needle protection.

[0032] 3. Regardless of whether the medication has been injected completely, such as if the needle is withdrawn midway through the injection, it will automatically lock in place once the concealed needle sheath retracts and returns to its original position, preventing the needle from protruding. This not only provides needle puncture prevention but also prevents the possibility of secondary injections. Each medication is administered only once to a single patient, ensuring safety and reliability. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 A schematic diagram of an energy storage type automatic injection device;

[0035] Figure 2 Exploded view of an energy storage automatic injection device;

[0036] Figure 3 This is a schematic diagram of the internal structure of an energy storage type automatic injection device.

[0037] Figure 4 This is a schematic diagram showing the connection between the release ring and the double buckle ring in the retracted state of the hidden needle sleeve.

[0038] Figure 5 This is a schematic diagram of the energy storage injection assembly structure;

[0039] Figure 6 This diagram illustrates the connection relationship between the release ring, the double retaining ring, and the outer shell when the hidden needle sleeve is retracted.

[0040] Figure 7This diagram illustrates the connection relationship between the release ring, the double locking ring, and the outer casing when the hidden needle sleeve is locked.

[0041] Figure 8 This is a schematic diagram of the drive rod structure;

[0042] Figure 9 This is a schematic diagram of the release ring structure;

[0043] Figure 10 This is a schematic diagram of the transfer cylinder structure;

[0044] Figure 11 This is a schematic diagram of the limiting ring structure.

[0045] The attached diagram lists the components represented by each number as follows:

[0046] 1. Protective cap; 2. Concealed pin sleeve; 2-1. Connecting rod section;

[0047] 3. Medicine bottle holder; 4. Limiting ring; 4-1. Threaded hole; 4-2. First buckle; 4-3. Clearance groove;

[0048] 5. Screw; 6. Torsion spring; 7. Drive rod; 7-1. Second snap-fit ​​rib; 7-2. Lever; 7-3. Connecting rib.

[0049] 8. Release ring; 8-1. Second buckle; 8-2. First connecting strip;

[0050] 9. Double buckle; 9-1. Connecting ring; 9-2. Third buckle; 9-4. Spring;

[0051] 10. Pen cap; 11. Outer shell; 11-1. Second snap-fit ​​slot; 11-2. Third snap-fit ​​slot; 11-3. First snap-fit ​​slot; 11-4. Observation window;

[0052] 12. Transfer tube; 12-1. Ratchet; 13. Pre-filled injection vial; 14. Fixing slot. Detailed Implementation

[0053] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments of this utility model, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the protection scope of this utility model. Furthermore, directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings; therefore, the directional terms used are for illustrative purposes and not for limiting the scope of this utility model.

[0054] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0055] Example

[0056] like Figures 1-11 As shown, this is a preferred embodiment of the present invention, an energy storage type automatic injection device, comprising: a housing 11, an energy storage injection component, a transmission locking component, a pen cap 10, and a pre-filled injection vial 13.

[0057] Combination Figures 2-3 , Figure 9 As shown, the outer shell 11 is sleeved on the outside of the transmission locking assembly. The transmission locking assembly includes a concealed needle sleeve 2, a transmission cylinder 12, and a release ring 8. One end of the concealed needle sleeve 2 extends out of the top of the outer shell 11, and the transmission cylinder 12 and the release ring 8 are sequentially arranged at the other end of the concealed needle sleeve 2. The inner wall of the release ring 8 is provided with a first locking rib 8-2, and the outer wall of the release ring 8 is provided with a fixing locking groove 14. The inner wall of the outer shell 11 is provided with a locking rib, and the fixing locking groove 11 engages with the locking rib.

[0058] In some embodiments, the energy storage automatic injection device also includes a protective cap 1, which is connected to a hidden needle sleeve 2 extending out of one end of the outer shell 11 to prevent accidental contact.

[0059] Combination Figure 5 , Figure 8 , Figure 11 As shown, the energy storage injection assembly includes a torsion spring 6, a drive rod 7, a screw 5, and a limiting ring 4; a second snap-fit ​​rib 7-1 is provided on the side wall of the drive rod 7, the drive rod 7 is inserted into the release ring 8, and the first snap-fit ​​rib 8-2 and the second snap-fit ​​rib 7-1 are snapped together in the circumferential direction; the limiting ring 4 is connected to the outer shell 11, and a threaded hole 4-1 is provided on the limiting ring 4; the drive rod 7 is connected to the torsion spring 6, and the bottom of the drive rod 7 is connected to the screw 5, and the screw 5 passes through the threaded hole 4-1 and abuts against the piston at the tail of the pre-filled injection vial 13.

[0060] The inner wall of the bottom end of the drive rod 7 is provided with a connecting rib 7-3, and the side wall of the screw 5 is provided with a connecting groove. The screw 5 is connected to the connecting rib 7-3 on the drive rod 7 through the connecting groove.

[0061] One end of the torsion spring 6 is connected to the limiting ring 4, and the other end is connected to the drive rod 7. The torsion spring 6 drives the drive rod 7 to rotate, thereby causing the screw 5 connected to the drive rod 7 to move axially relative to the limiting ring 4.

[0062] The energy storage injection assembly is housed within the transmission locking assembly, which is used to lock and release the energy storage injection assembly. Specifically, in the initial state, the fixing groove 14 on the outer wall of the release ring 8 engages with the locking rib of the outer shell 11, restricting the circumferential rotation of the release ring 8 in its initial position. The drive rod 7 of the energy storage injection assembly is inserted into the release ring 8 and engages circumferentially, further restricting the circumferential rotation of the drive rod 7. The torsion spring 6 completes energy storage during product assembly. Due to the aforementioned restriction on circumferential rotation, the torsion spring 6 remains in a stored state when not in use.

[0063] During injection, when the hidden needle sleeve 2 contacts the skin and is pushed into the outer shell 11, the hidden needle sleeve 2 sequentially drives the transfer cylinder 12 and the release ring 8 to move along the axial direction of the outer shell 11. When the first retaining rib 8-2 of the release ring 8 separates from the second retaining rib 7-1 of the drive rod 7, the torsion spring 6 on the drive rod 7 is no longer constrained, releasing its stored energy to drive the drive rod 7 to rotate. The drive rod 7 drives the bottom screw 5 to rotate, and the limiting ring 4 is fixed relative to the outer shell 11, thereby causing the screw 5 to rotate and push the piston of the pre-filled injection vial 13 to move, completing the automatic injection action.

[0064] Combination Figure 1 As shown, the outer wall of the limiting ring 4 is provided with a first buckle 4-2, and the side wall of the outer shell 11 is provided with a corresponding first buckle groove 11-3. The first buckle 4-2 engages with the first buckle groove 11-3 to fix the limiting ring 4 inside the outer shell 11.

[0065] When in use, the limiting ring 4 is fixed relative to the outer shell 11, the screw 5 engages with the threaded hole 4-1 of the limiting ring 4, and the drive rod 7 is driven to rotate by the torsion spring 6, which causes the screw 5 to rotate and move downward relative to the limiting ring 4.

[0066] Combination Figure 4 As shown, the transmission locking assembly also includes a double buckle 9, which is located at the end of the release ring 8 away from the drive rod 7. A connecting ring 9-1 is provided inside the double buckle 9. A second buckle 8-1 is provided on the outer wall of the release ring 8, and the double buckle 9 is sleeved on the outside of the release ring 8.

[0067] When the release ring 8 moves axially, the first snap-fit ​​rib 8-2 of the release ring 8 separates from the second snap-fit ​​rib 7-1 of the drive rod 7, the release ring 8 is inserted into the double buckle ring 9, and the second snap-fit ​​8-1 is engaged with the connecting ring 9-1, connecting the release ring 8 and the double buckle ring 9.

[0068] Combination Figures 1-2 , Figures 5-7As shown, the energy storage automatic injection device also includes a pen cap 10, which is installed at the tail end of the housing 11; a second snap-fit ​​groove 11-1 and a third snap-fit ​​groove 11-2 are sequentially provided on the side wall of the housing 11 at a certain distance from the tail end of the housing 11.

[0069] The outer wall of the double buckle 9 is also provided with an elastic arm, and a third buckle 9-2 is provided on the elastic arm; in the initial state, the third buckle 9-2 is engaged with the second buckle groove 11-1.

[0070] The transmission locking assembly also includes a spring 9-4, one end of which abuts against the release ring 8, and the other end of which abuts against the pen cap 10.

[0071] When the release ring 8 moves axially, it compresses the spring 9-4, storing energy for the spring 9-4. When the hidden needle sleeve 2 moves away from the skin, the spring 9-4 drives the release ring 8 to reset. As mentioned above, during the retraction of the hidden needle sleeve 2, the release ring 8 inserts into and connects with the double buckle ring 9. Therefore, under the action of the spring 9-4, the release ring 8 drives the double buckle ring 9 to move downward simultaneously. The third buckle 9-2 disengages from the second buckle groove 11-1 and enters the third buckle groove 11-2 for fixation. The third buckle groove 11-2 restricts the axial movement of the transmission locking assembly backward, thereby preventing the reset hidden needle sleeve 2 from retracting into the outer shell 11, thus achieving the needle tip anti-puncture protection function.

[0072] Combination Figure 8 , Figure 10 As shown, a lever 7-2 is also provided on the drive rod 7. The lever 7-2 is arranged around the circumference of the drive rod 7, and the drive rod 7 is sleeved inside the transmission cylinder 12.

[0073] The inner wall of the transfer cylinder 12 is provided with ratchet teeth 12-1, which mesh with the lever 7-2.

[0074] During the rotation and release of the drive lever 7, the lever 7-2 rotates, deforms, and impacts the ratchet 12-1 of the transfer cylinder 12, generating a "tap-tap-tap" injection sound and vibration feedback to interactively remind the user of the injection progress. When the "tap-tap-tap" sound stops, the user is reminded that the injection progress is complete.

[0075] It should be noted that the release ring 8, the double buckle ring 9 and the transfer cylinder 12 are all provided with fixed locking grooves 14 at corresponding positions on their outer walls, which are used to engage with the locking ribs on the inner wall of the outer shell 11 to restrict the rotational movement of the above structures.

[0076] The concealed needle sleeve 2 includes a concealed needle section and a connecting rod section 2-1, with the concealed needle section extending out from the top of the outer shell 11; the energy storage automatic injection device also includes a vial support 3, which is disposed between the limiting ring 4 and the concealed needle sleeve 2, and is used to fix the pre-filled injection vial 13; the needle tip of the pre-filled injection vial 13 passes through the vial support 3 and extends into the concealed needle section;

[0077] The side walls of the medicine bottle holder 3 and the limiting ring are provided with clearance grooves 4-3. The connecting rod 2-1 passes through the clearance grooves 4-3 of the medicine bottle holder 3 and the limiting ring 4 in sequence and then abuts against the transfer cylinder 12.

[0078] The side wall of the outer casing 11 is also provided with an observation window 11-4, which is located on the outer casing 11 at the position corresponding to the medicine bottle support 3. The observation window 11-4 is used to assist in observing whether the piston of the pre-filled injection bottle 13 has moved to the bottom. For easy observation, the side wall of the medicine bottle support 3 can be set as a hollow structure or made of transparent material.

[0079] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. An energy storage type automatic injection device, characterized in that, include: The outer casing, the energy storage injection assembly, the transmission locking assembly, the pen cap, and the pre-filled injection vial; The outer casing is fitted over the transmission locking assembly, which includes a concealed needle sleeve, a transmission cylinder, and a release ring. One end of the concealed needle sleeve extends out of the top of the outer casing, and the other end of the concealed needle sleeve is sequentially provided with the transmission cylinder and the release ring. The inner wall of the release ring is provided with a first snap-fit ​​rib, and the outer wall of the release ring is provided with a fixed snap-fit ​​groove. The inner wall of the outer casing is provided with a locking rib, and the fixed snap-fit ​​groove snaps into the locking rib. The energy storage injection assembly includes an energy storage component, a drive rod, a screw, and a limiting ring. A second snap-fit ​​rib is provided on the side wall of the drive rod. The drive rod is inserted into the release ring, and the first snap-fit ​​rib and the second snap-fit ​​rib are snapped together in the circumferential direction. The limiting ring is connected to the outer shell and is provided with a threaded hole. The drive rod is connected to the energy storage component and the screw. After passing through the threaded hole, the screw abuts against the piston at the tail of the pre-filled injection vial.

2. The energy storage type automatic injection device according to claim 1, characterized in that, The energy storage component is a torsion spring, with one end of the torsion spring connected to a limiting ring and the other end connected to a drive rod.

3. The energy storage automatic injection device according to claim 2, characterized in that, The inner wall at the bottom of the drive rod is provided with a connecting rib, and the side wall of the screw is provided with a connecting groove. The screw is connected to the connecting rib on the drive rod through the connecting groove.

4. The energy storage type automatic injection device according to claim 1, characterized in that, The outer wall of the limiting ring is provided with a first buckle, and the side wall of the outer shell is provided with a corresponding first buckle groove. The first buckle engages with the first buckle groove to fix the limiting ring inside the outer shell.

5. The energy storage type automatic injection device according to claim 1, characterized in that, The transmission locking assembly also includes a double buckle, which is located at the end of the release ring away from the drive rod, and a connecting ring is provided inside the double buckle; a second buckle is provided on the outer wall of the release ring, and the double buckle is sleeved on the outside of the release ring.

6. The energy storage automatic injection device according to claim 5, characterized in that, The energy storage automatic injection device also includes a pen cap, which is installed at the tail end of the housing; a second snap-fit ​​groove and a third snap-fit ​​groove are sequentially provided on the side wall of the housing at a certain distance from the tail end of the housing. The outer wall of the double buckle is also provided with an elastic arm, and a third buckle is provided on the elastic arm; in the initial state, the third buckle is engaged with the second buckle groove; The transmission locking assembly also includes a spring, one end of which abuts against the release ring and the other end against the pen cap.

7. The energy storage type automatic injection device according to claim 1, characterized in that, The drive rod is also provided with a lever, which is arranged around the circumference of the drive rod, and the drive rod is sleeved inside the transmission cylinder; The inner wall of the transfer cylinder is provided with ratchet teeth, which engage with the lever.

8. The energy storage type automatic injection device according to claim 1, characterized in that, The concealed needle sleeve includes a concealed needle section and a connecting rod section, with the concealed needle section extending out from the top of the outer shell; the energy storage automatic injection device also includes a vial holder, which is disposed between the limiting ring and the concealed needle sleeve, and is used to fix a pre-filled injection vial; the needle tip of the pre-filled injection vial passes through the vial holder and extends into the concealed needle section; The side walls of the medicine bottle holder and the limiting ring are provided with clearance grooves. After the connecting rod segment passes through the clearance grooves of the medicine bottle holder and the limiting ring in sequence, it abuts against the transfer cylinder.

9. The energy storage type automatic injection device according to claim 8, characterized in that, The side wall of the outer casing is also provided with an observation window, which is located on the outer casing corresponding to the medicine bottle holder; the observation window is used to assist in observing whether the piston of the pre-filled injection bottle has moved to the bottom; the side wall of the medicine bottle holder is a hollow structure or a transparent material.

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