A device with a needle stick protection and a pre-filled syringe

Abstract

The utility model relates to injection device field, concretely is a device and pre -filled syringe of having anti -stab protection, the device of having anti -stab protection includes medicine storehouse shell, hidden needle cover, hidden needle connecting rod, connecting rod spring, medicine bottle support, medicine bottle gland, hidden needle limiting piece and pre -filled medicine bottle, hidden needle cover and hidden needle connecting rod connect and set up in medicine storehouse shell, the one end of hidden needle connecting rod is away from hidden needle cover and is sequentially provided with hidden needle limiting piece and medicine storehouse gland, be provided with the knob on hidden needle limiting piece, the knob drives hidden needle limiting piece rotation, limit or release hidden needle connecting rod's axial movement, hidden needle connecting rod and pre -filled medicine bottle cover set up in medicine bottle support, and connecting rod spring is arranged between hidden needle connecting rod and medicine bottle support, the fixing of hidden needle cover is realized through the clamping of hidden needle connecting rod and hidden needle limiting piece, and further avoid needle head to expose outside hidden needle cover, prevent needle head from being hurt by mistake. Reset through the device elasticity, the process is simple, and the degree of automation is high, and the user operation difficulty is low.

Description

Technical Field

[0001] This utility model relates to the field of injection devices, specifically a device with anti-puncture protection and a pre-filled syringe. Background Technology

[0002] Disposable pre-filled syringes are currently a commonly used product in the self-medication system field, with a large user market. Disposable pre-filled syringes eliminate the need to draw medication from the vial into the syringe, reducing administration time and minimizing waste.

[0003] A disposable pre-filled syringe generally consists of a main unit and a drug cartridge. The main unit is designed to be reusable with a motor and battery, while the drug cartridge is designed to be a disposable consumable. The drug cartridge contains a disposable pre-filled vial, and the drug cartridge is detachably connected to the main unit for easy replacement of the disposable pre-filled vial.

[0004] To prevent accidental injury to users from used syringe needles, or the reuse of pre-filled vials, it is generally required that needles be collected and disposed of after injection. However, the possibility of accidental injury still exists during the collection process. Therefore, with the increasingly stringent management of medical devices, some institutions have required the installation of special protective devices on disposable pre-filled vials.

[0005] Therefore, this problem is solved by designing a needle protection device for pre-filled medicine bottles on the medicine tank used in conjunction with an electronic injection pen. Utility Model Content

[0006] To overcome the problems existing in the prior art, the purpose of this utility model is to provide a device with anti-puncture protection and a pre-filled syringe to prevent accidental injury from the injection needle.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a device with anti-puncture protection, comprising a medicine chamber shell, at least one set of limiting components, a connecting rod spring, a medicine bottle support, a medicine bottle cap, a hidden needle limiting piece, and a pre-filled medicine bottle;

[0008] The limiting component includes a hidden needle sleeve and a hidden needle connecting rod. The hidden needle sleeve and the hidden needle connecting rod are connected and disposed inside the medicine chamber shell. A hidden needle limiting piece and a medicine chamber cap are sequentially disposed at the end of the hidden needle connecting rod away from the hidden needle sleeve.

[0009] The concealed needle limiting plate engages with the concealed needle connecting rod to limit the axial movement of the concealed needle connecting rod; the concealed needle limiting plate is equipped with a toggle block.

[0010] The concealed needle connecting rod and the pre-filled medicine bottle are fitted inside the medicine bottle support, and a connecting rod spring is provided between the concealed needle connecting rod and the medicine bottle support; the needle end of the pre-filled medicine bottle is inserted into the concealed needle sleeve from the medicine bottle support, and the tail end of the pre-filled medicine bottle is connected to the medicine bottle support.

[0011] The hidden needle linkage is equipped with a linkage spring. When not in use, the linkage spring is in a compressed state, and the needle of the pre-filled medicine bottle is set below the plane of the hidden needle sleeve to protect the needle from being exposed.

[0012] The medicine cartridge is used in conjunction with the main unit of the electronic injection pen. In the initial state, the hidden needle sleeve extends out of the medicine cartridge shell, and the axial movement of the hidden needle sleeve is restricted by the engagement between the hidden needle limiting plate and the hidden needle connecting rod, thus protecting the internal needle.

[0013] After the drug cartridge is assembled into the main unit of the electronic injection pen, a lever on the main unit actuates a lever on the concealed needle limiting plate, releasing the concealed needle connecting rod and allowing the concealed needle sleeve to move freely. By contacting the injection site, the concealed needle sleeve is pressed into the drug cartridge housing, exposing the internal needle for injection. After injection, the drug cartridge separates from the injection site and the main unit of the electronic injection pen is removed. During this process, the concealed needle limiting plate resets, and the concealed needle connecting rod also resets under the action of the connecting rod spring. The concealed needle limiting plate then engages with the concealed needle connecting rod again, restricting the axial movement of the concealed needle sleeve and achieving the needle puncture prevention function.

[0014] The present invention is further configured such that: the outer shell of the medicine container includes a needle extension section, a transition section and an installation section, wherein the needle extension section is sequentially connected to the transition section and the installation section;

[0015] The inner wall of the needle protrusion section is provided with a first track rib for connecting the hidden needle sleeve.

[0016] The inner wall of the transition section is provided with protruding limiting ribs to limit the position of the medicine bottle holder.

[0017] The inner wall of the installation section is provided with a second track rib for connecting the medicine bottle holder.

[0018] The present invention is further configured such that: one end of the hidden needle sleeve is provided with a protruding connecting section along the circumferential direction, the connecting section is provided with a connecting through hole, and a protruding snap-fit ​​block is provided in the connecting through hole;

[0019] One end of the concealed needle connecting rod is provided with a first snap-fit ​​groove, which matches the shape of the connecting through hole and snaps into the snap-fit ​​block.

[0020] The present invention is further configured such that: a first track groove is provided on the connecting section of the hidden needle sleeve, and the position and shape of the first track groove are matched with the first track rib.

[0021] The first track groove and the first snap-fit ​​groove are misaligned.

[0022] The purpose of the above structure is to guide and restrict the rotational movement of the hidden needle sleeve through the first track rib, so that the hidden needle sleeve can only reciprocate along the axial direction of the outer shell of the medicine container.

[0023] The present invention is further configured such that: the medicine bottle holder includes a support section and a guide section; one end of the support section near the guide section is a first stop surface, and the other end is provided with a mounting groove;

[0024] The interior of the support section includes a medicine bottle compartment and a connecting rod compartment, with the connecting rod compartment located on the outside of the medicine bottle compartment; the medicine bottle compartment extends from the mounting groove to the bottom end of the guide section; the connecting rod compartment extends from the mounting groove to the first stop surface.

[0025] The present invention is further configured such that: the outer wall of the support section is also provided with a second track groove, the second track groove being matched with the position and shape of the second track rib;

[0026] The second track rib is inserted into the second track groove, and the first stop surface abuts against the limiting rib.

[0027] The axial movement of the medicine bottle holder is restricted by the limiting ribs, and the rotational movement of the medicine bottle holder is restricted by the second track ribs.

[0028] The present invention is further provided with a U-shaped connecting rod guide groove on the outer wall of the guide section at the insertion position of the hidden needle connecting rod.

[0029] The present invention is further configured such that: a second locking groove is provided at the end of the concealed needle connecting rod away from the first locking groove, and the concealed needle connecting rod is connected to the concealed needle limiting piece through the second locking groove after passing through the connecting rod compartment.

[0030] The present invention is further configured such that: a lower limit spring is provided on the hidden needle connecting rod, one end of the connecting rod spring abuts against the lower limit spring, and the other end abuts against the inner wall of the connecting rod compartment.

[0031] The present invention is further configured such that: a connecting rod through hole is provided on the medicine bottle cap, the hidden needle limiting piece is connected to the medicine bottle cap, and the hidden needle connecting rod is connected to the hidden needle limiting piece and passes through the connecting rod through hole.

[0032] The present invention is further configured such that: the outer wall of the medicine bottle cap is provided with a third track groove, the third track groove is matched with the position and shape of the second track rib, and limit blocks are also provided on both sides of the top of the second track rib;

[0033] The third track groove is connected to the second track rib, and the top of the medicine bottle cap abuts against the limiting block.

[0034] The purpose of the above structure is to restrict the rotational movement of the medicine bottle cap by the second track rib, restrict the upward axial movement of the medicine bottle cap by the limiting block, and restrict the downward axial movement of the medicine bottle cap by the medicine bottle support, so as to prevent the medicine bottle cap from detaching from the outer shell of the medicine compartment.

[0035] The present invention is further configured such that the hidden needle limiting piece is a toggle piece or a metal spring piece.

[0036] The present invention is further configured such that: the actuating piece is provided with a limit opening and an elastic arm;

[0037] The actuating block is located on top of the actuating plate, and the elastic arm is arranged along the axial direction of the actuating plate; the hidden needle connecting rod passes through the limiting opening and is engaged with one side of the limiting opening through the second locking groove, and the axial length of the limiting opening is greater than the diameter of the hidden needle connecting rod.

[0038] The present invention is further configured such that: a blocking rib is provided at the bottom of the medicine bottle cap along the movement direction of the elastic arm; a toggle groove is provided on the medicine bottle cap; a toggle piece is provided at the bottom of the medicine bottle cap; and the toggle block extends out of the toggle groove.

[0039] In actual use, the lever on the main unit will move the toggle block, causing the hidden needle limit plate to rotate, separating the limit opening from the second locking groove, releasing the hidden needle connecting rod, at which point the hidden needle sleeve can move freely. After injection, the elastic arm returns to its original position due to the elastic force generated by contact with the blocking rib, and the hidden needle connecting rod also returns to its original position due to the elasticity of the connecting rod spring, causing the limit opening to engage with the second locking groove again.

[0040] The present invention is further configured such that: the metal spring includes a fixed arm, the fixed arm is connected to the actuating block, and the actuating block is an elastic limiting arm;

[0041] The fixing arm is fixed to the top of the medicine bottle cap, and the elastic limiting arm is engaged with the second locking groove.

[0042] The elastic limiting arm is a limiting structure composed of bent metal springs. It achieves limiting by engaging with the second locking slot. After the medicine tank and the main unit are connected, the elastic limiting arm is pressed to leave the second locking slot, releasing the movement of the hidden needle connecting rod.

[0043] This utility model also relates to a pre-filled syringe, including the aforementioned device with anti-puncture protection.

[0044] In summary, the beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0045] 1. This utility model achieves the fixation of the hidden needle sleeve by the snap-fit ​​between the hidden needle connecting rod and the hidden needle limiting piece, thereby preventing the needle tip from being exposed outside the hidden needle sleeve and effectively preventing accidental needle injury.

[0046] 2. This utility model works in conjunction with the main unit of an electronic injection pen. By rotating the hidden needle limiting plate, the hidden needle connecting rod is released, allowing the hidden needle connecting rod and the hidden needle sleeve to move axially along the device during injection, exposing the internal needle tip for injection. After injection, the hidden needle limiting plate resets, and the hidden needle connecting rod also resets under the action of the connecting rod spring. The hidden needle limiting plate then engages with the hidden needle connecting rod again, restricting the axial movement of the hidden needle sleeve, thus achieving the function of preventing needle puncture and avoiding secondary contamination.

[0047] The reset mechanism utilizes a linkage spring and the elastic arm of the concealed needle limiting plate, resulting in a simple, highly automated process with low user difficulty. Furthermore, the needle is only exposed during injection, ensuring good safety. Attached Figure Description

[0048] 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.

[0049] Figure 1 This is an isometric view of the first embodiment of the present invention;

[0050] Figure 2 This is an exploded isometric view of the first embodiment of the present invention;

[0051] Figure 3 This is an axial sectional view of the first embodiment of the present invention;

[0052] Figure 4 This is an axial sectional view of the hidden needle connecting rod after it has been released and limited according to the first embodiment of the present invention;

[0053] Figure 5 This is an axial view of the position of the hidden needle connecting rod in the limited state according to the first embodiment of the present invention;

[0054] Figure 6 This is an axial view of the position of the hidden needle connecting rod in the released and limited state of the first embodiment of the present invention.

[0055] Figure 7 This is a cross-sectional view of the internal structure of the medicine container shell according to the first embodiment of the present invention;

[0056] Figure 8 This is an isometric view of the hidden needle sleeve according to the first embodiment of the present invention;

[0057] Figure 9 This is an isometric view of the hidden needle connecting rod according to the first embodiment of the present invention;

[0058] Figure 10This is an axonometric sectional view of the medicine bottle holder according to the first embodiment of the present invention;

[0059] Figure 11 This is an axonometric view of the front of the medicine bottle cap according to the first embodiment of the present invention;

[0060] Figure 12 This is an axonometric view of the reverse side of the medicine bottle cap in the first embodiment;

[0061] Figure 13 This is an isometric view of the hidden needle limiting piece according to the first embodiment of the present invention;

[0062] Figure 14 A schematic diagram showing the state of the second locking groove and the limiting opening before and during the movement of the hidden needle limit piece toggle block;

[0063] Figure 15 A schematic diagram showing the state of the second locking groove and the limiting opening when the hidden needle limit piece toggle block is moved.

[0064] Figure 16 This is a cross-sectional view of the connection between the present invention and the electronic injection pen host in an embodiment of the invention;

[0065] Figure 17 for Figure 16 Enlarged view of a portion of point A in the middle;

[0066] Figure 18 A schematic diagram of the lever on the main unit of an electronic injection pen;

[0067] Figure 19 This is an isometric view of the second embodiment of the present invention;

[0068] Figure 20 This is a cross-sectional view of Embodiment 2 of the present invention;

[0069] Figure 21 This is a schematic diagram illustrating the toggle mechanism in Embodiment 2 of the present invention;

[0070] Figure 22 for Figure 21 Enlarged view of a section at point B in the middle;

[0071] Figure 23 This is an isometric drawing of the hidden needle limiting plate in the second embodiment.

[0072] The attached diagram lists the components represented by each number as follows:

[0073] 1. Drug compartment shell; 1-1. First track rib; 1-2. Limiting rib; 1-3. Second track rib; 1-4. Limiting block; 1-11. Needle protrusion section; 1-12. Transition section; 1-13. Installation section;

[0074] 2. Hidden needle sleeve; 2-1. First track groove; 2-2. Connecting through hole;

[0075] 3. Concealed needle connecting rod; 3-1. Spring lower limit; 3-2. First locking groove; 3-3. Second locking groove;

[0076] 4. Medicine bottle holder; 4-1. Linkage compartment; 4-2. Mounting groove; 4-3. First stop surface; 4-4. Second track groove; 4-5. Linkage guide groove;

[0077] 5. Medicine bottle cap; 5-1. Connecting rod through hole; 5-2. Actuating slide groove; 5-3. Blocking rib; 5-4. Third track groove.

[0078] 6. Concealed needle limit piece; 6-1. Actuating block; 6-2. Elastic arm; 6-3. Limiting opening;

[0079] 7. Connecting rod spring;

[0080] 8. Pre-filled and sealed medicine bottles;

[0081] 9-1. Toggle lever;

[0082] 10. Metal spring clip; 10-1. Elastic limiting arm; 10-2. Fixed arm. Detailed Implementation

[0083] 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.

[0084] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0085] Example 1:

[0086] like Figures 1-18 As shown in the figure, a preferred embodiment of the present invention is a device with anti-puncture protection, including a medicine tank shell 1, at least one set of limiting components, a connecting rod spring 7, a medicine bottle support 4, a medicine bottle cap 5, a hidden needle limiting piece 6, and a pre-filled medicine bottle 8; in this embodiment, as shown in the figure, two sets of limiting components are symmetrically arranged with the axis of the medicine tank shell 1 as the center.

[0087] Combination Figures 1-2As shown, the limiting component includes a concealed needle sleeve 2 and a concealed needle connecting rod 3. The concealed needle sleeve 2 and the concealed needle connecting rod 3 are connected and disposed inside the medicine chamber shell 1. A concealed needle limiting piece 6 and a medicine chamber cover 5 are sequentially disposed at the end of the concealed needle connecting rod 3 away from the concealed needle sleeve 2. The concealed needle limiting piece 6 is engaged with the concealed needle connecting rod 3 to limit the axial movement of the concealed needle connecting rod 3. A toggle block 6-1 is disposed on the concealed needle limiting piece 6.

[0088] The concealed needle connecting rod 3 and the pre-filled medicine bottle 8 are sleeved inside the medicine bottle support 4. A connecting rod spring 7 is provided between the concealed needle connecting rod 3 and the medicine bottle support 4. The needle end of the pre-filled medicine bottle 8 is inserted into the concealed needle sleeve 2 from the medicine bottle support 4, and the tail end of the pre-filled medicine bottle 8 is connected to the medicine bottle support 4.

[0089] like Figure 3 , Figure 5 As shown, in the initial state, the concealed needle sleeve 2 extends out of the outer shell 1 of the medicine container, covering the needle of the pre-filled medicine bottle 8 inside. Figure 4 , Figure 6 As shown, when the hidden needle limiting piece 6 is moved and the hidden needle connecting rod 3 is released, the hidden needle connecting rod 3 and the hidden needle sleeve 2 move along the axial direction of the device.

[0090] Combination Figure 7 As shown, the outer shell of the medicine compartment 1 includes a needle extension section 1-11, a transition section 1-12 and an installation section 1-13, wherein the needle extension section 1-11 is sequentially connected to the transition section 1-12 and the installation section 1-13;

[0091] The inner wall of the needle protrusion section 1-11 is provided with a first track rib 1-1 for connecting the hidden needle sleeve 2;

[0092] The inner wall of the transition section 1-12 is provided with protruding limiting ribs 1-2; used to limit the position of the medicine bottle support 4.

[0093] The inner wall of the installation section 1-13 is provided with a second track rib 1-3 for connecting the medicine bottle support 4.

[0094] Combination Figure 8 As shown, one end of the hidden needle sleeve 2 is provided with a protruding connecting section along the circumferential direction, the connecting section is provided with a connecting through hole 2-2, and a protruding snap-fit ​​block is provided in the connecting through hole 2-2;

[0095] Combination Figure 9 As shown, one end of the hidden needle connecting rod 3 is provided with a first snap-fit ​​groove 3-2, which matches the shape of the connecting through hole 2-2 and snaps into the snap-fit ​​block.

[0096] The connecting section of the hidden needle sleeve 2 is also provided with a first track groove 2-1, the first track groove 2-1 being matched with the position and shape of the first track rib 1-1.

[0097] Combination Figure 10 As shown, the medicine bottle holder 4 includes a support section and a guide section; one end of the support section near the guide section is a first stop surface 4-3, and the other end is provided with a mounting groove 4-2;

[0098] The interior of the support section includes a medicine bottle compartment and a connecting rod compartment 4-1, with the connecting rod compartment 4-1 located on the outside of the medicine bottle compartment; the medicine bottle compartment extends from the mounting groove 4-2 to the bottom of the guide section; the connecting rod compartment 4-1 extends from the mounting groove 4-2 to the first stop surface 4-3.

[0099] The outer wall of the support section is also provided with a second track groove 4-4, the second track groove 4-4 being matched with the position and shape of the second track rib 1-3;

[0100] The second track rib 1-3 is inserted into the second track groove 4-4, and the first stop surface 4-3 abuts against the limiting rib 1-2.

[0101] The axial movement of the medicine bottle holder 4 is restricted by the limiting ribs 1-2, and the rotational movement of the medicine bottle holder 4 is restricted by the second track ribs 1-3.

[0102] The outer wall of the guide section is also provided with a U-shaped connecting rod guide groove 4-5 at the insertion position of the hidden needle connecting rod 3.

[0103] The hidden needle connecting rod 3 is provided with a second locking groove 3-3 at one end away from the first locking groove 3-2. After passing through the connecting rod compartment 4-1, the hidden needle connecting rod 3 is connected to the hidden needle limiting piece 6 through the second locking groove 3-3.

[0104] The hidden needle connecting rod 3 is also provided with a lower spring limit 3-1. One end of the connecting rod spring 7 abuts against the lower spring limit 3-1, and the other end abuts against the inner wall of the connecting rod compartment 4-1.

[0105] Combination Figures 11-12 As shown, the medicine bottle cap 5 is provided with a connecting rod through hole 5-1, the hidden needle limiting piece 6 is connected to the medicine bottle cap 5, and the hidden needle connecting rod 3 is connected to the hidden needle limiting piece 6 and passes through the connecting rod through hole 5-1.

[0106] The outer wall of the medicine bottle cap 5 is provided with a third track groove 5-4, which matches the position and shape of the second track rib 1-3. Limiting blocks 1-4 are also provided on both sides of the top of the second track rib 1-3.

[0107] The third track groove 5-4 is connected to the second track rib 1-3, and the top of the medicine bottle cap 5 abuts against the limiting block 1-4.

[0108] The rotational movement of the medicine bottle cap 5 is restricted by the second track ribs 1-3, the upward axial movement of the medicine bottle cap 5 is restricted by the limit blocks 1-4, and the downward axial movement of the medicine bottle cap 5 is restricted by the medicine bottle support 4, so as to prevent the medicine bottle cap 5 from detaching from the medicine chamber shell 1.

[0109] Combination Figure 13 As shown, in this embodiment, the hidden needle limiting piece 6 is a toggle piece, and the toggle piece is provided with a limiting opening 6-3 and an elastic arm 6-2;

[0110] The actuating block 6-1 is disposed on the top of the actuating plate, and the elastic arm 6-2 is disposed along the axial direction of the actuating plate; the hidden needle connecting rod 3 passes through the limiting opening 6-3 and is engaged with one side of the limiting opening 6-3 through the second locking groove 3-3, and the axial length of the limiting opening 6-3 is greater than the diameter of the hidden needle connecting rod 3.

[0111] The bottom of the medicine bottle cap 5 is provided with a blocking rib 5-3 along the movement direction of the elastic arm 6-2. The medicine bottle cap 5 is provided with a toggle groove 5-2. The toggle piece is provided at the bottom of the medicine bottle cap 5, and the toggle block 6-1 extends out of the toggle groove 6-3.

[0112] Combination Figure 18 As shown, the main unit of the electronic injection pen is equipped with a lever 9-1. The main unit drives the lever 9-1 to rotate, which in turn drives the lever block 6-1 to rotate the hidden needle limit piece 6.

[0113] Combination Figures 14-17 As shown, in the unused state, the connecting spring 7 is in a compressed state, and the needle of the pre-filled medicine bottle 8 is positioned below the plane of the concealed needle sleeve 2, protecting the needle from being exposed. In actual use, the toggle lever 9-1 on the main unit will move the toggle block 6-1, causing the concealed needle limiting piece 6 to rotate, separating the limiting opening 6-3 from the second locking groove 3-3, releasing the concealed needle connecting rod 3. At this time, the concealed needle sleeve 2 can move freely. Through the contact between the concealed needle sleeve 2 and the injection site, the concealed needle sleeve 2 is pressed into the medicine tank outer shell 1, exposing the internal needle for injection.

[0114] After the injection is completed, the outer shell 1 of the drug chamber separates from the injection position and the main unit of the electronic injection pen is removed. During this process, the elastic arm 6-2 returns to its original position due to the elastic force generated by contact with the blocking rib 5-3, and the hidden needle connecting rod 3 also returns to its original position due to the elasticity of the connecting rod spring 7. The hidden needle sleeve 2 extends out of the outer shell 1 of the drug chamber, and the hidden needle limiting piece 6 engages with the hidden needle connecting rod 3 again to restrict the axial movement of the hidden needle sleeve 2, thereby achieving the function of preventing needle puncture and avoiding secondary contamination.

[0115] Example 2:

[0116] like Figures 19-23As shown, this is a preferred embodiment of the present invention, a device with anti-puncture protection. The only difference from embodiment 1 is that in this embodiment, the hidden needle limiting piece is a metal spring piece 10, including a fixing arm 10-2, the fixing arm 10-2 is connected to the actuating block, and the actuating block is an elastic limiting arm 10-1.

[0117] The fixing arm 10-2 is fixed to the top of the medicine bottle cap 5, and the elastic limiting arm 10-1 is engaged with the second locking groove 3-3.

[0118] The elastic limiting arm 10-1 is a limiting structure composed of bent metal springs. It achieves limiting by engaging with the second locking groove 3-3. After the medicine compartment and the main unit are connected, the elastic limiting arm 10-1 is moved away from the second locking groove 3-3 by the toggle lever 9-1, releasing the hidden needle connecting rod 3.

[0119] Example 3:

[0120] like Figure 16 or Figure 21 As shown, this utility model also relates to a pre-filled syringe, including a device with anti-puncture protection as described in Embodiment 1 or Embodiment 2.

[0121] 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. A device with puncture protection, characterized in that, It includes a medicine compartment shell, at least one set of limiting components, a connecting spring, a medicine bottle holder, a medicine bottle cap, a hidden needle limiting plate, and a pre-filled medicine bottle; The limiting component includes a hidden needle sleeve and a hidden needle connecting rod. The hidden needle sleeve and the hidden needle connecting rod are connected and disposed inside the medicine chamber shell. A hidden needle limiting piece and a medicine chamber cap are sequentially disposed at the end of the hidden needle connecting rod away from the hidden needle sleeve. The concealed needle limiting plate is engaged with the concealed needle connecting rod, and a toggle block is provided on the concealed needle limiting plate; the toggle block drives the concealed needle limiting plate to rotate, thereby restricting or releasing the axial movement of the concealed needle connecting rod. The concealed needle connecting rod and the pre-filled medicine bottle are fitted inside the medicine bottle support, and a connecting rod spring is provided between the concealed needle connecting rod and the medicine bottle support; the needle end of the pre-filled medicine bottle is inserted into the concealed needle sleeve from the medicine bottle support, and the tail end of the pre-filled medicine bottle is connected to the medicine bottle support.

2. The device with puncture protection according to claim 1, characterized in that, The outer shell of the medicine container includes a needle extension section, a transition section and an installation section, wherein the needle extension section is connected to the transition section and the installation section in sequence; The inner wall of the needle protrusion section is provided with a first track rib; the inner wall of the transition section is provided with a protruding limiting rib; and the inner wall of the installation section is provided with a second track rib.

3. The device with puncture protection according to claim 2, characterized in that, One end of the hidden needle sleeve is provided with a protruding connecting section along the circumferential direction, the connecting section is provided with a connecting through hole, and a protruding snap-fit ​​block is provided in the connecting through hole; One end of the concealed needle connecting rod is provided with a first snap-fit ​​groove, which matches the shape of the connecting through hole and snaps into the snap-fit ​​block.

4. The device with puncture protection according to claim 3, characterized in that, The connecting section of the hidden needle sleeve is also provided with a first track groove, which matches the position and shape of the first track rib.

5. A device with puncture protection according to claim 3, characterized in that, The medicine bottle holder includes a support section and a guide section; one end of the support section near the guide section is a first stop surface, and the other end of the support section is provided with a mounting groove. The interior of the support section includes a medicine bottle compartment and a connecting rod compartment, with the connecting rod compartment located on the outside of the medicine bottle compartment; the medicine bottle compartment extends from the mounting groove to the bottom end of the guide section; the connecting rod compartment extends from the mounting groove to the first stop surface.

6. A device with puncture protection according to claim 5, characterized in that, The outer wall of the support section is also provided with a second track groove, the second track groove being matched with the position and shape of the second track rib; The second track rib is inserted into the second track groove, and the first stop surface abuts against the limiting rib.

7. A device with puncture protection according to claim 6, characterized in that, The outer wall of the guide section is also provided with a U-shaped connecting rod guide groove at the insertion position of the hidden needle connecting rod.

8. A device with puncture protection according to claim 5, characterized in that, The hidden needle connecting rod is provided with a second locking groove at the end away from the first locking groove. After passing through the connecting rod compartment, the hidden needle connecting rod is connected to the hidden needle limiting piece through the second locking groove.

9. A device with puncture protection according to claim 8, characterized in that, The hidden needle connecting rod is also provided with a lower limit spring. One end of the connecting rod spring abuts against the lower limit spring, and the other end abuts against the inner wall of the connecting rod compartment.

10. A device with puncture protection according to claim 8, characterized in that, The medicine bottle cap is provided with a connecting rod through hole. The hidden needle limiting piece is connected to the medicine bottle cap, and the hidden needle connecting rod is connected to the hidden needle limiting piece and passes through the connecting rod through hole.

11. A device with puncture protection according to claim 10, characterized in that, The outer wall of the medicine bottle cap is provided with a third track groove, which matches the position and shape of the second track rib. Limiting blocks are also provided on both sides of the top of the second track rib. The third track groove is connected to the second track rib, and the top of the medicine bottle cap abuts against the limiting block.

12. A device with puncture protection according to claim 10, characterized in that, The hidden needle limiting piece is a toggle piece or a metal spring piece.

13. A device with puncture protection according to claim 12, characterized in that, The actuating piece is provided with a limit opening and an elastic arm; The actuating block is located on top of the actuating plate, and the elastic arm is arranged along the axial direction of the actuating plate; the hidden needle connecting rod passes through the limiting opening and is engaged with one side of the limiting opening through the second locking groove, and the axial length of the limiting opening is greater than the diameter of the hidden needle connecting rod.

14. A device with puncture protection according to claim 13, characterized in that, The bottom of the medicine bottle cap is provided with a blocking rib along the movement direction of the elastic arm. The medicine bottle cap is provided with a toggle groove. The toggle piece is provided at the bottom of the medicine bottle cap, and the toggle block extends out of the toggle groove.

15. A device with puncture protection according to claim 12, characterized in that, The metal spring includes a fixed arm, which is connected to the actuating block, and the actuating block is an elastic limiting arm; The fixing arm is fixed to the top of the medicine bottle cap, and the elastic limiting arm is engaged with the second locking groove.

16. A pre-filled syringe, characterized in that, Includes a puncture-resistant device as described in any one of claims 1-15.

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