Puncture injury prevention insulin pen

Abstract

The utility model discloses an anti-puncture insulin pen, which is provided with a pen cap with an injection and push end, a pen refill frame connected with the pen cap and an insulin pen refill mounted in the pen refill frame, and comprises an anti-puncture needle head detachably connected to the bottom end of the pen refill frame, and the pen refill frame is provided with a connecting cylinder which is communicated with the inside and is used for mounting the anti-puncture needle head; the anti-puncture needle head comprises an outer sleeve connected with the refill frame, an inner needle core which is arranged in the outer sleeve, is in sliding connection with the connecting cylinder and is internally communicated with the connecting cylinder, and a first locking part and a second locking part which are arranged in the outer sleeve at an interval and are used for locking the position of the inner needle core, and the inner needle core can reciprocate in the outer sleeve; when the inner needle core moves to the first locking part and is locked by the first locking part, the needle body of the inner needle core is located in the outer sleeve, when the inner needle core moves to the second locking part and is locked by the second locking part, the needle body of the inner needle core is exposed out of the outer sleeve, the safety state and the injection state of the needle head are switched conveniently, and puncture injuries are reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of medical apparatus and instruments, and particularly relates to a puncture-preventing insulin pen. BACKGROUND

[0002] Diabetes is a metabolic disease characterized by high blood sugar, and high blood sugar is caused by insulin secretion defects or impaired biological action, or both. Long-term high blood sugar leads to chronic damage and dysfunction of various tissues, especially the eyes, kidneys, heart, blood vessels, and nerves. Therefore, diabetic patients need to inject insulin for a long time to reduce blood sugar and prevent complications.

[0003] The existing insulin pen is connected with the injection needle through threads when in use, and the injection needle is protected by a needle cap. After injection, the needle cap needs to be reattached and then the needle is removed to avoid injury from the exposed needle tip. Even if the needle cap is reattached, it can be easily knocked off during disassembly, which can cause puncture injury. UTILITARIAN CONTENT

[0004] In view of the technical problems of the prior art that the injection needle is reattached with the needle cap and then removed, the needle cap is easily knocked off, and the exposed needle can cause puncture injury, the utility model provides a puncture-preventing insulin pen.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A puncture-preventing insulin pen has a needle cap for a push end, a cartridge holder screwed to the bottom end of the needle cap, and an insulin cartridge installed in the cartridge holder. It comprises a puncture-preventing needle detachably connected to the bottom end of the cartridge holder. The cartridge holder has a connecting cylinder connected to the internal injection passage and used for installing the puncture-preventing needle. The puncture-preventing needle comprises an outer sleeve detachably connected to the cartridge holder, an inner needle core arranged in the outer sleeve and slidably connected to the connecting cylinder, and a first locking portion and a second locking portion arranged in the outer sleeve and spaced apart to lock the position of the inner needle core. The first locking portion is close to the top end of the outer sleeve. The inner needle core can reciprocate in the outer sleeve. When the inner needle core moves to the first locking portion and is locked by the first locking portion, the needle body of the inner needle core is located in the outer sleeve. When the inner needle core moves to the second locking portion and is locked by the second locking portion, the needle body of the inner needle core is exposed outside the outer sleeve.

[0007] Further, the inner needle core comprises a needle holder and a needle seat connected to the bottom end of the needle holder; the needle seat comprises a first seat body, a recess cavity opened on the upper end of the first seat body, a second seat body fixed in the recess cavity and arranged concentrically with the recess cavity, and a liquid injection channel opened in the first seat body and communicated with the inner cavity of the second seat body at one end, which can be communicated with the needle holder.

[0008] Further, the inner side wall of the recess cavity and the outer peripheral surface of the second seat body are covered with a rubber layer, the height of the second seat body is higher than the height of the recess cavity, the second seat body extends from the bottom surface of the recess cavity towards the outside of the recess cavity, and the outer wall of the second seat body can be slidably fitted with the inner wall of the connecting cylinder after the pen core holder is connected with the outer sleeve.

[0009] Further, the outer wall of the first seat body is provided with a matching assembly which can be detachably connected with the first locking part and the second locking part, the matching assembly comprises a plurality of matching cavities provided on the outer wall of the first seat body, and a matching ball provided in each matching cavity, and the matching ball can move in the matching cavity, and the position of the first seat body can be locked when the matching ball moves towards the outside of the matching cavity and enters the first locking part or the second locking part.

[0010] Further, the first locking part and the second locking part are identical in structure, the first locking part is a locking groove provided on the inner wall of the outer sleeve and recessed towards the outside of the outer sleeve, the locking groove comprises a flat groove wall and two inclined groove walls respectively connected on both sides of the flat groove wall, and the included angle between the flat groove wall and the inclined groove wall is an obtuse angle.

[0011] Further, the outer wall of the first seat body is connected with two oppositely arranged holding members which horizontally extend away from the first seat body from the outer wall of the first seat body, and in the top view, the non-connected end of the holding member is located outside the outer sleeve, holding the holding member can control the reciprocating movement of the inner needle core in the outer sleeve, when the position of the matching ball corresponds to the position of the first locking part, the matching ball can move towards the direction close to the outer sleeve until the matching ball is clamped in the first locking part so that the needle holder is located in the outer sleeve, and when the position of the matching ball corresponds to the position of the second locking part, the matching ball can move towards the direction close to the outer sleeve until the matching ball is clamped in the second locking part so that the needle holder is exposed outside the outer sleeve.

[0012] Further, the outer sleeve comprises an inner hollow cylinder and an annular table fixed on the outer periphery of the cylinder, the top surface of the annular table is provided with a plurality of connecting holes, the bottom surface of the pen core holder is fixedly connected with connecting pieces capable of being clamped with the plurality of connecting holes one by one, and the plurality of connecting pieces surround the connecting cylinder.

[0013] Further, the connecting piece comprises a connecting rod connected with the pen core holder at one end and a connecting pin fixed at the bottom end of the connecting piece, the head of the connecting pin is spherical, the diameter of the root is smaller than that of the head, and the connecting hole is three-quarter spherical and matched with the head of the connecting pin.

[0014] Therefore, the beneficial effects of the utility model are as follows: 1. The puncture-preventing needle head connected with the pen core holder can be switched between the safe state (the needle body is back in the outer sleeve) and the injection state (the needle body is exposed outside the outer sleeve), and before or after injection, the puncture-preventing needle head is switched to the safe state for disassembly, so that the needle body is not exposed, and the occurrence of puncture injury is reduced. 2. The inner needle core can move in the outer sleeve, and is locked by the locking groove and the matched ball, so that the position of the needle seat is locked. The inner needle core can be self-locked in the outer sleeve, and the locking is stable and firm, so that the inner needle core and the outer sleeve are not separated and fallen off due to touching or bumping, and the needle body can be always protected in the outer sleeve. Compared with the traditional direct back sleeve needle cap, the occurrence of puncture injury due to mistake is effectively reduced. 3. During the movement of the inner needle core, the holding part is away from the needle body, and the protection effect of the operating hand is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a structural schematic view of the puncture-preventing insulin pen provided by the utility model.

[0016] Figure 2 is Figure 1 a structural schematic view of the puncture-preventing needle head in the installation state.

[0017] Figure 3 is a structural schematic view of the pen core holder without the puncture-preventing needle head in the utility model.

[0018] Figure 4 is a three-dimensional structural schematic view of the puncture-preventing needle head in the utility model.

[0019] Figure 5 is Figure 4 a vertical sectional view of

[0020] Figure 6 is Figure 5 a local enlarged view of A part in

[0021] In the figure, 100 - pen cap, 110 - injection end head, 200 - refill holder, 210 - connecting barrel, 300 - puncture-proof needle, 310 - outer sleeve, 311 - barrel, 312 - annular platform, 3120 - connecting hole, 320 - inner needle core, 321 - needle seat, 3210 - first seat body, 3210A - holding piece, 3210B - annular platform, 3211 - recessed cavity, 3212 - second seat body, 3213 - liquid injection passage, 322 - needle body, 400 - matched ball, 500 - locking groove, 510 - flat groove wall, 520 - inclined groove wall, 600 - connecting piece, 610 - connecting rod, 620 - connecting pin. DETAILED DESCRIPTION

[0022] The utility model is further explained below in combination with specific drawings.

[0023] As Figure 1 And Figure 2The utility model provides a kind of puncture-proof insulin pen, with the cap 100 of injection push end head 110, the cartridge holder 200 of screwing in the bottom end of cap 100 and the insulin cartridge installed in cartridge holder 200, including detachably connected in the bottom end of cartridge holder 200 puncture-proof needle 300.Cartridge holder 200 has a connecting cylinder 210 for installing puncture-proof needle 300 and being communicated with internal injection passage.Puncture-proof needle 300 includes detachably connected with cartridge holder 200 outer sleeve 310, inner needle core 320 in outer sleeve 310 and slidingly connected with connecting cylinder 210 and also communicated with connecting cylinder 210 inside and first locking portion and second locking portion arranged in outer sleeve 310 and spaced apart for locking the position of inner needle core 320.First locking portion is close to the top end of outer sleeve 310, and inner needle core 320 can reciprocate in outer sleeve 310, when inner needle core 320 moves to first locking portion and is locked by first locking portion, needle body 322 of inner needle core 320 is located in outer sleeve 310.When inner needle core 320 moves to second locking portion and is locked by second locking portion, needle body 322 of inner needle core 320 is exposed outside outer sleeve 310.Split cap 100 and cartridge holder 200, install insulin cartridge in inner cartridge holder 200, before connecting puncture-proof needle 300, inner needle core 320 has been locked in position by first locking portion, needle body 322 cannot be exposed outside outer sleeve 310, and sharp tip is protected in outer sleeve 310 to be protected, avoid being accidentally stabbed when installing.Aligning connecting cylinder 210 with inner needle core 320, then connect outer sleeve 310 with cartridge holder 200, can install puncture-proof needle 300 in the bottom end of cartridge holder 200, then move inner needle core 320 towards the direction outside outer sleeve 310, until it moves to the position corresponding to second locking portion and is locked by second locking portion, in this state, needle body 322 of inner needle core 320 is exposed outside outer sleeve 310, and can implement injection of insulin.After completing injection, move inner needle core 320 towards the direction close to connecting cylinder 210, until it moves to the position corresponding to first locking portion, and sharp needle body 322 is locked in outer sleeve 310, then separate cartridge holder 200 from puncture-proof needle 300, and it also cannot be mistakenly stabbed, reduce the occurrence of puncture injury.When disassembling puncture-proof needle 300, needle body 322 can always be locked in outer sleeve 310 for protection, to avoid direct exposure of needle body 322.

[0024] Please refer to Figure 4 Outer sleeve 310 includes hollow cylinder body 311 and annular table 312 fixed to the outer periphery of cylinder body 311, and the top surface of annular table 312 is provided with a plurality of connecting holes 3120, and the bottom surface of cartridge holder 200 is fixedly connected with a plurality of connecting pieces 600 capable of being clamped in one-to-one correspondence with the plurality of connecting holes 3120, and the connecting cylinder 210 is surrounded by the plurality of connecting pieces 600. Figure 3The connecting piece 600 comprises a connecting rod 610 connected with the pen core holder 200 at one end and a connecting pin 620 fixed at the bottom end of the connecting piece 600. The head of the connecting pin 620 is spherical, and the diameter of the root is smaller than that of the head. The connecting hole 3120 is three-quarter spherical to match the head of the connecting pin 620. The connecting piece 600 is connected with the annular table 312, and the connecting position is more, so that the connection is more firm. The connecting pin 620 is clamped in the connecting hole 3120, so that the puncture-proof needle 300 can be quickly disassembled and assembled, and the connection is stable and firm, and the operation is simple and easy.

[0025] Please refer to Figure 5 and Figure 6 The first locking part and the second locking part are consistent in structure, and the first locking part and the second locking part are arranged in the height direction of the cylinder body 311. The first locking part is a locking groove 500 arranged on the inner wall of the cylinder body 311 of the outer sleeve 310 and recessed to the outside of the cylinder body 311. The locking groove 500 comprises a flat groove wall 510 and two inclined groove walls 520 respectively corresponding to the two sides of the flat groove wall 510. The included angle between the flat groove wall 510 and the inclined groove wall 520 is obtuse. The two inclined groove walls 520 and the flat groove wall 510 form an open groove.

[0026] Please continue to refer to Figure 5The inner needle core 320 comprises a needle holder 321 and a needle body 322 connected to the bottom end of the needle holder 321. The needle holder 321 comprises a first holder body 3210, a recessed cavity 3211 opened at the upper end of the first holder body 3210, a second holder body 3212 fixed in the recessed cavity 3211 and arranged concentrically with the recessed cavity 3211, and a liquid injection passage 3213 opened in the first holder body 3210 and in communication with the inner cavity of the second holder body 3212 at one end, the liquid injection passage 3213 being in communication with the inside of the connecting cylinder 210 at one end and being capable of communicating with the needle body 322 at the other end. The inner side wall of the recessed cavity 3211 and the outer peripheral surface of the second holder body 3212 are both covered with a rubber layer, the height of the second holder body 3212 is higher than the height of the recessed cavity 3211, the second holder body 3212 extends from the bottom surface of the recessed cavity 3211 towards the outside of the recessed cavity 3211, and after the pen core holder 200 is connected with the outer sleeve 310, the outer wall of the second holder body 3212 can be slidably fitted with the inner wall of the connecting cylinder 210, and when the inner needle core 320 is not locked, the second holder body 3212 can reciprocate in the connecting cylinder 210 along the height direction of the connecting cylinder 210. When the puncture-proof needle 300 is installed, the second holder body 3212 protruding from the recessed cavity 3211 is aligned and inserted into the inside of the connecting cylinder 210, and the second holder body 3212 can reciprocate in the connecting cylinder 210, the rubber layer on the outer wall of the second holder body 3212 is in contact with the inner wall of the connecting cylinder 210, thereby playing a sealing role to avoid leakage of the internal liquid. The rubber layer on the inner side wall of the recessed cavity 3211 is also in contact with the outer wall of the connecting cylinder 210, thereby playing a sealing role to improve the sealing performance at the connecting position of the second holder body 3212 and the connecting cylinder 210, and even if the position of the second holder body 3212 is moved, the liquid can also be prevented from leaking outward.

[0027] The outer wall of the first seat body 3210 is provided with a matching assembly capable of being detachably connected with the first locking part and the second locking part, the matching assembly comprises a plurality of matching cavities provided on the outer wall of the first seat body 3210, a matching ball 400 corresponding to each matching cavity, and a ring table 3210B fixed to the edge of the first seat body 3210, and the matching ball 400 preferably adopts a steel ball and can reciprocate in the matching cavity. When the matching ball 400 moves towards the outside of the matching cavity and enters the first locking part or the second locking part, the position of the first seat body 3210 can be locked. Before injection, when the position of the matching ball 400 corresponds to the position of the first locking part, the matching ball 400 can move towards the direction close to the outer sleeve 310 until the matching ball 400 is clamped in the first locking part so that the needle body 322 is located in the outer sleeve 310. The locking groove 500 for locking the position of the first seat body 3210 is a groove recessed towards the outside of the outer sleeve 310. When the inner needle core 320 moves to the recessed position, the matching ball 400 moves towards the direction close to the locking groove 500 until the matching ball 400 is partially exposed outside the matching cavity and enters the locking groove 500, is resisted by the flat groove wall 510 and the inclined groove wall 520, the position of the first seat body 3210 is locked, and the inner needle core 320 is prevented from shaking, which facilitates the installation of the puncture-proof needle 300 in this state.

[0028] When injection is needed, the first seat body 3210 is controlled to move away from the connecting cylinder 210. When the position of the matching ball 400 corresponds to the position of the second locking part, the matching ball 400 can move towards the direction close to the outer sleeve 310 until the matching ball 400 is clamped in the locking groove 500 at the corresponding position. In this state, the position of the inner needle core 320 is locked, the needle body 322 is exposed outside the outer sleeve 310, and injection is facilitated. After injection is completed, the first seat body 3210 is controlled to move towards the connecting cylinder 210. The locking groove 500 is an open recess, the matching ball 400 can exit from the locking groove 500, and after the needle seat 321 moves upwards, the matching ball 400 can be limited in the first locking part, and the needle body 322 is protected in the outer sleeve 310. At this time, the pen core holder 200 and the puncture-proof needle 300 are separated, and even if there is a hand slip mistake, puncture injury will not easily occur.

[0029] The outer diameter of the ring table 3210B is greater than the inner diameter of the outer sleeve 310, which can limit the position of the needle seat 321, and the ring table 3210B can also serve as a holding part for controlling the movement of the inner needle core 320.

[0030] Please continue to refer to Figure 4The outer wall of the first seat body 3210 is connected with two oppositely arranged holding members 3210A, the holding members 3210A extend horizontally from the outer wall of the ring table 3210B of the first seat body 3210 towards the direction away from the first seat body 3210, and in the top view of the orthographic projection plane, the non-connected end of the holding member 3210A is located outside the outer sleeve 310, and holding the holding member 3210A can control the reciprocating movement of the inner needle core 320 in the outer sleeve 310. The holding member 3210A extends outward, is longer in length and does not interfere with the connecting member 600, so that it is convenient to hold and control the reciprocating movement of the inner needle core 320, and the holding position for operating the movement of the inner needle core 320 is away from the needle body 322, so that the effect of avoiding accidental injury is better.

[0031] The anti-puncture needle connected with the needle core holder 200 can be conveniently switched between the safe state (the needle body 322 is back in the outer sleeve 310) and the injection state (the needle body 322 is exposed outside the outer sleeve 310), and before or after injection, only the anti-puncture needle 300 needs to be switched to the safe state for disassembly, and the needle body 322 is no longer exposed, reducing the occurrence of puncture injury. Two, the inner needle core 320 can move in the outer sleeve 310, and the locking groove 500 at the corresponding position cooperates with the cooperating ball 400 to complete the locking of the position of the needle seat 321. The inner needle core 320 can be self-locked inside the outer sleeve 310, and the locking is stable and firm, and the two will not be easily separated and fallen off due to touching or bumping, and the needle body 322 can be always protected in the outer sleeve 310, compared with the traditional direct back sleeve needle cap, the occurrence of puncture injury due to mistake can be effectively reduced. Three, during the movement of the inner needle core 320 controlled by holding the holding member 3210A, the holding position is away from the needle body 322, further improving the protection effect on the operating hand.

[0032] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure, direct or indirect application in other related technical fields according to the content of the present application specification and drawings, is also within the patent protection range of the present application.

Claims

1. A puncture injury preventing insulin pen, having a cap with a push end, a cartridge holder screwed to the bottom end of the cap, and an insulin cartridge installed in the cartridge holder, characterized in that: The application relates to a safety needle connected to the bottom end of a pen barrel, wherein the pen barrel is provided with a connecting cylinder communicating with an internal injection channel and used for mounting the safety needle; the safety needle comprises an outer sleeve connected to the pen barrel, an inner needle core arranged in the outer sleeve and slidably connected to the connecting cylinder and communicating with the connecting cylinder, and a first locking part and a second locking part arranged in the outer sleeve and used for locking the position of the inner needle core; the inner needle core can reciprocate in the outer sleeve; when the inner needle core is moved to the first locking part and locked by the first locking part, the needle body of the inner needle core is arranged in the outer sleeve; when the inner needle core is moved to the second locking part and locked by the second locking part, the needle body of the inner needle core is exposed outside the outer sleeve.

2. The puncture resistant insulin pen of claim 1, wherein: The inner needle core comprises a needle base and a needle body connected to the bottom end of the needle base; the needle base comprises a first base body, a concave cavity arranged on the upper end of the first base body, a second base body fixedly connected to the concave cavity and arranged in a concentric mode with the concave cavity, and a liquid injection channel arranged in the first base body and communicating with the inner cavity of the second base body; the liquid injection channel can communicate with the needle body.

3. The puncture resistant insulin pen of claim 2, wherein: The inner side wall of the concave cavity and the outer peripheral surface of the second base body are covered with rubber layers; the height of the second base body is higher than the height of the concave cavity; the second base body extends from the bottom surface of the concave cavity to the outside of the concave cavity; the outer wall of the second base body can be slidably matched with the inner wall of the connecting cylinder after the pen barrel is connected to the outer sleeve; the second base body can reciprocate along the height direction of the connecting cylinder when the inner needle core is not locked.

4. The puncture resistant insulin pen of claim 2, wherein: The outer wall of the first base body is provided with a matching assembly which can be detachably connected to the first locking part and the second locking part; the matching assembly comprises a plurality of matching cavities arranged on the outer wall of the first base body and a plurality of matching balls arranged in the matching cavities in a one-to-one mode; the matching balls can move in the matching cavities; the position of the first base body can be locked when the matching balls are moved to the outside of the matching cavities and enter the first locking part or the second locking part.

5. The puncture resistant insulin pen of claim 4, wherein: The first locking part and the second locking part are identical in structure; the first locking part is a locking groove arranged on the inner wall of the outer sleeve and recessed to the outside of the outer sleeve; the locking groove comprises a flat groove wall and two inclined groove walls connected to the two sides of the flat groove wall respectively; the included angle between the flat groove wall and the inclined groove walls is an obtuse angle.

6. The puncture resistant insulin pen of claim 5, wherein: The outer wall of the first seat body is connected with two oppositely arranged holding members which extend horizontally from the outer wall of the first seat body towards the direction away from the first seat body. In the top view, the non-connected end of the holding member is located outside the outer sleeve. Holding the holding member can control the reciprocating movement of the inner needle core in the outer sleeve. When the position of the cooperating ball corresponds to the position of the first locking part, the cooperating ball can move towards the direction close to the outer sleeve until the cooperating ball is clamped in the first locking part so that the needle body is located in the outer sleeve. When the position of the cooperating ball corresponds to the position of the second locking part, the cooperating ball can move towards the direction close to the outer sleeve until the cooperating ball is clamped in the second locking part so that the needle body is exposed outside the outer sleeve.

7. The puncture resistant insulin pen of any of claims 1-6, wherein: The outer sleeve comprises an inner hollow cylinder and an annular table fixed to the outer periphery of the cylinder. The top surface of the annular table is provided with a plurality of connecting holes. The bottom surface of the pen core holder is fixedly connected with a plurality of connecting members which can be clamped one by one with the connecting holes.

8. The puncture resistant insulin pen of claim 7, wherein: The connecting member comprises a connecting rod connected with the pen core holder at one end and a connecting pin fixed to the bottom end of the connecting member. The head of the connecting pin is spherical, and the diameter of the root is smaller than that of the head. The connecting hole is three-quarter spherical to cooperate with the head of the connecting pin.

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