Disposable safety insulin pen needle

Abstract

The utility model discloses a disposable safety type insulin pen needle in the field of needle, including the protection cover and the antiskid line of its outside setting, the butt joint internal thread is equipped with in the protection cover inner arc surface, the protection cover inner wall bottom is connected with the puncture needle, still including the shell, the installation internal thread is equipped with in the shell inner arc surface, the shell center place is equipped with the mounting piece, the needle head is slidably connected with in the mounting piece center place, the outer arc surface of needle head is connected with self -destructing part, the utility model discloses a device can effectively improve the disposable insulin pen needle's use economy, guarantees the device can use less part realization disposable self -destructing effect simultaneously, and the device avoids using the guiding recess or the convex structure and reduces the part production difficulty of the device.

Description

Technical Field

[0001] This utility model relates to the field of needle technology, and in particular to disposable safety insulin pen needles. Background Technology

[0002] In the existing technology, there are various structural types of needle protection devices for insulin pen needles, mainly including manual protection type and automatic protection type. Among them, the manual protection type of insulin pen needle requires manual pushing of the needle guard to the protective position after injection, which is inconvenient.

[0003] Chinese Patent CN111658896B discloses an automatically triggered needle protection device and an insulin pen needle. The automatically triggered needle protection device includes at least a needle hub, a sheath, a protective cover, a spring, and a support member. The support member has at least an initial state and a supported state, configured to switch between the initial state and the supported state. In the initial state, the support base of the support member contacts the upper end of the needle hub and is provided with a circumferential limiting mechanism between it and the needle mounting part. In the supported state, the support member is disengaged from the sliding groove, and the lower end of the support arm is located above the support surface. In this structure, the protective cover is automatically triggered, eliminating the need for secondary operation during the protection process, making it simple and quick to operate. Furthermore, the support member is located on the inner side and provides axial support within the space between the protective cover and the needle hub, resulting in better safety and reliability of the support. The needle protection state cannot be easily compromised from the outside, effectively preventing the insulin pen needle from being reused.

[0004] However, the above-mentioned publicly disclosed solutions have the following shortcomings: the above solutions use a combination of rotation and limiting mechanisms to achieve the self-destruction effect of the needle, but the needle part of the above devices is mostly a cylindrical groove or protrusion structure, which is difficult to install and assemble, and the above devices have many parts, resulting in high production costs. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of the present invention, to avoid obscuring the purpose of these documents, and such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] The purpose of this invention is to address the technical problems existing in the background art. This invention proposes a disposable safety insulin pen needle. This invention can effectively improve the economic efficiency of disposable insulin pen needles, while ensuring that the device can achieve the effect of one-time self-destruction with fewer parts. Furthermore, this device avoids the use of guide grooves or protrusion structures, reducing the difficulty of manufacturing the parts of this device.

[0007] This utility model proposes a disposable safety insulin pen needle, including a protective cover and anti-slip texture on its outer side. The inner arc surface of the protective cover is provided with a mating internal thread, and a puncture needle is connected to the bottom of the inner wall of the protective cover. It also includes a shell, the inner arc surface of the shell is provided with an installation internal thread, an installation component is provided at the center of the shell, a needle is slidably connected at the center of the installation component, and a self-destruct component is connected to the outer arc surface of the needle.

[0008] By adopting the above technical solution, this solution can pre-puncture the insulin pen through the structure of the protective cover and puncture needle, thereby facilitating the puncture of the insulin pen's dispensing end and ensuring smooth dispensing after subsequent assembly.

[0009] Preferably, the self-destruct component includes a torsion spring housing connected to the inner wall of the housing, a torsion spring connected to the inner wall of the torsion spring housing, and the other end of the torsion spring connected to the outer arc surface of the needle.

[0010] By adopting the above technical solution, this solution can drive the needle to rotate through the torsion spring structure, thereby triggering different states of the device when it rotates to different angles.

[0011] Preferably, the outer arc surface of the needle is connected to a rotating rod, and the top of the torsion spring housing is provided with a blocking protrusion. The blocking protrusion contacts the side of the rotating rod, and the rotating rod is pressed against the side of the blocking protrusion through the torsion spring.

[0012] By adopting the above technical solution, this solution can achieve different locking states of the device through the combination of limiting protrusions and limiting components, and trigger the one-time self-destruction effect of the device by the pressing pressure generated during the skin insertion process.

[0013] Preferably, the inner wall of the housing is connected to a blocking member, the blocking member having a different height from the blocking protrusion, the blocking member having the same thickness as the blocking protrusion, and the blocking protrusion having the same thickness as the rotating rod.

[0014] By adopting the above technical solution, this solution can achieve the limiting effect of the rotating rod through the structure of the blocking component, thereby ensuring that the needle will not retract excessively inward during use, thus ensuring the stability of the injection process.

[0015] Preferably, the outer arc surface of the needle is rotatably connected to a rotating connector, one side of which is connected to a rebound spring, and the other end of the rebound spring is connected to the inner wall of the housing, and the rebound spring is in a stretched state.

[0016] By adopting the above technical solution, this solution uses a rebound spring to allow the needle to slide inward during the injection process and to slide outward after the injection is completed.

[0017] Preferably, a spring bracket is slidably connected to the outer arc surface of the needle, and two self-destructing springs are connected to the bottom of the spring bracket. The other end of the self-destructing spring is connected to the inner wall of the housing. The self-destructing spring is in a compressed state, and the elastic force of the self-destructing spring is greater than that of the rebound spring.

[0018] By adopting the above technical solution, this solution can drive the needle to retract significantly inward through the self-destructing spring and spring bracket, thereby achieving the self-destruction effect.

[0019] Preferably, there is a gap between the bottom of the spring bracket and the rotating connector, a transmission ring is connected to the outer arc surface of the needle, there is a gap between the transmission ring and the spring bracket, a constraint rope is connected to the bottom of the spring bracket, and the other end of the constraint rope is connected to the bottom of the inner wall of the torsion spring housing.

[0020] By adopting the above technical solution, this solution achieves the effect of one-time irreversibility of the device through the structure of the constraint rope.

[0021] Preferably, the rotating rod has a blade on its side, the blade facing the direction of the blocking protrusion, and the constraint rope is located within the rotation range of the blade.

[0022] By adopting the above technical solution, this solution achieves the effect of self-starting of the device by cutting the constraint rope with a blade.

[0023] In summary, this utility model has at least the following beneficial effects:

[0024] This device uses a one-time-connected restraint rope to trigger its internal self-destruct mechanism, causing the needle to retract inward and become unusable for a second time. This does not affect the injection effect during the first use, ensuring the stability and safety of the device. Attached Figure Description

[0025] 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.

[0026] Figure 1 This is a front view of an embodiment of the disposable safety insulin pen needle of this utility model;

[0027] Figure 2 This is a schematic diagram of the puncture needle in an embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the needle structure in an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the rotating connector in an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the constraint rope in an embodiment of the present invention;

[0031] Reference numerals: 1. Protective cover; 2. Anti-slip texture; 3. Internal thread; 4. Housing; 5. Puncture needle; 6. Internal thread for mounting; 7. Needle; 8. Self-destructing component; 801. Torsion spring housing; 802. Torsion spring; 803. Rotating rod; 804. Blocking protrusion; 805. Rotating connector; 806. Rebound spring; 807. Blocking component; 808. Spring bracket; 809. Self-destructing spring; 810. Transmission ring; 811. Restraint rope; 812. Blade; 9. Mounting component. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-5 The present invention will be described in further detail below.

[0033] Example 1, as Figures 1-5 As shown, in order to solve the existing problems, this utility model discloses a disposable safety insulin pen needle, including a protective cover 1 and anti-slip texture 2 on its outer side. The inner arc surface of the protective cover 1 is provided with a mating internal thread 3. A puncture needle 5 is connected to the bottom of the inner wall of the protective cover 1. It also includes a housing 4. The inner arc surface of the housing 4 is provided with an installation internal thread 6. An installation part 9 is provided at the center of the housing 4. A needle 7 is slidably connected at the center of the installation part 9. A self-destructing component 8 is connected to the outer arc surface of the needle 7.

[0034] The self-destruct component 8 includes a torsion spring housing 801 connected to the inner wall of the housing 4, a torsion spring 802 connected to the inner wall of the torsion spring housing 801, and the other end of the torsion spring 802 connected to the outer arc surface of the needle 7.

[0035] The outer arc surface of the needle 7 is connected to a rotating rod 803. The top of the torsion spring housing 801 is provided with a blocking protrusion 804. The blocking protrusion 804 contacts the side of the rotating rod 803. The rotating rod 803 is pressed against the side of the blocking protrusion 804 by the torsion spring 802.

[0036] The inner wall of the housing 4 is connected to a blocking member 807. The blocking member 807 has a different height from the blocking protrusion 804. The thickness of the blocking member 807 is the same as the thickness of the blocking protrusion 804. The thickness of the blocking protrusion 804 is the same as the thickness of the rotating rod 803.

[0037] The outer arc surface of the needle 7 is rotatably connected to a rotating connector 805. A spring 806 is connected to one side of the rotating connector 805, and the other end of the spring 806 is connected to the inner wall of the housing 4. The spring 806 is in a stretched state.

[0038] The specific working principle is as follows: the rotation effect of the needle 7 of this device enables the device to be used only once. When using this device, the protective cover 1 and the housing 4 are stored in a sterile sealed bag. When using it, the protective cover 1 is first connected to the insulin pen by thread. The insulin pen is punctured by the puncture needle 5 to stabilize the subsequent liquid output. After puncturing, the protective cover 1 is removed, and the housing 4 is installed on the insulin pen's liquid output end by the internal thread 6 for insulin injection.

[0039] During the injection process, after the needle 7 contacts the skin, it is pressed and slides towards the insulin pen, causing the rotating connector 805 to contact the bottom of the spring support 808. As the needle 7 slides inward, the rotating rod 803 and the blocking protrusion 804 are misaligned, allowing the rotating rod 803 to rotate freely. At this time, the rotating rod 803 rotates 90 degrees with the needle 7 under the action of the torsion spring 802 until the rotating rod 803 contacts the side of the blocking member 807. At this point, because the rotating connector 805 is in contact with the bottom of the spring support 808, the needle 7 cannot continue to slide inward, thus ensuring a stable injection process.

[0040] After injection, the needle 7 is pulled out from under the skin. At this time, the needle 7, no longer pressed, slides in the opposite direction under the action of the rebound spring 806. The rotating rod 803 and the blocking member 807 are misaligned, allowing the rotating rod 803 to continue rotating. During the continued rotation of the rotating rod 803, the blade 812 cuts the constraint rope 811 connected to the spring bracket 808. The spring bracket 808, no longer limited by the constraint rope 811, slides rapidly towards the insulin pen under the action of the self-destructing spring 809. When the top of the spring bracket 808 contacts the transmission ring 810 on the outer arc surface of the needle 7, the spring bracket 808 drives the needle 7 to slide inward. Since the elastic force of the two self-destructing springs 809 is greater than the elastic force of the rebound spring 806, the resultant force on the needle 7 is still in the inward contraction direction, thus achieving the effect of automatic contraction of the needle 7 after use and its inability to recover, thereby achieving the effect of disposable needle 7 of this device.

[0041] Example 2, as Figures 1-5 As shown, in order to solve the existing problems in this embodiment, based on the same concept as the first embodiment above, the disposable safety insulin pen needle further includes: a spring bracket 808 is slidably connected to the outer arc surface of the needle 7, two self-destructing springs 809 are connected to the bottom of the spring bracket 808, the other end of the self-destructing spring 809 is connected to the inner wall of the housing 4, and the self-destructing spring 809 is in a compressed state.

[0042] There is a gap between the bottom of the spring bracket 808 and the rotating connector 805. The outer arc surface of the needle 7 is connected to a transmission ring 810. There is a gap between the transmission ring 810 and the spring bracket 808. A constraint rope 811 is connected to the bottom of the spring bracket 808. The other end of the constraint rope 811 is connected to the bottom of the inner wall of the torsion spring housing 801.

[0043] The rotating rod 803 has a blade 812 on its side, which faces the blocking protrusion 804. The restraint rope 811 is located within the rotation range of the blade 812.

[0044] The specific working principle is as follows: the combination of the telescopic sliding effect of the needle 7 of this device and the rotation of the torsion spring 802 can realize the function of triggering the self-destruct structure of this device, thereby achieving the effect of avoiding secondary use of this device.

[0045] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A disposable safety insulin pen needle, comprising a protective cover (1) and anti-slip texture (2) on its outer side, characterized in that, The protective cover (1) has an inner arc surface with a mating internal thread (3), and a puncture needle (5) is connected to the bottom of the inner wall of the protective cover (1). It also includes a housing (4), the inner arc surface of the housing (4) has an installation internal thread (6), the center of the housing (4) has an installation part (9), the center of the installation part (9) is slidably connected to a needle (7), and the outer arc surface of the needle (7) is connected to a self-destructing component (8).

2. The disposable safety insulin pen needle according to claim 1, characterized in that, The self-destruct component (8) includes a torsion spring housing (801) connected to the inner wall of the housing (4), a torsion spring (802) connected to the inner wall of the torsion spring housing (801), and the other end of the torsion spring (802) connected to the outer arc surface of the needle (7).

3. The disposable safety insulin pen needle according to claim 2, characterized in that, The outer arc surface of the needle (7) is connected to a rotating rod (803). The top of the torsion spring housing (801) is provided with a blocking protrusion (804). The blocking protrusion (804) contacts the side of the rotating rod (803). The rotating rod (803) is pressed by the torsion spring (802) against the side of the blocking protrusion (804).

4. The disposable safety insulin pen needle according to claim 3, characterized in that, The inner wall of the housing (4) is connected to a blocking member (807). The blocking member (807) has a different height from the blocking protrusion (804). The thickness of the blocking member (807) is the same as the thickness of the blocking protrusion (804). The thickness of the blocking protrusion (804) is the same as the thickness of the rotating rod (803).

5. The disposable safety insulin pen needle according to claim 4, characterized in that, The outer arc surface of the needle (7) is rotatably connected to a rotating connector (805). A spring (806) is connected to one side of the rotating connector (805). The other end of the spring (806) is connected to the inner wall of the housing (4). The spring (806) is in a stretched state.

6. The disposable safety insulin pen needle according to claim 5, characterized in that, The needle (7) is slidably connected to a spring bracket (808) on its outer arc surface. Two self-destructing springs (809) are connected to the bottom of the spring bracket (808). The other end of the self-destructing spring (809) is connected to the inner wall of the housing (4). The self-destructing spring (809) is in a compressed state.

7. The disposable safety insulin pen needle according to claim 6, characterized in that, There is a gap between the bottom of the spring bracket (808) and the rotating connector (805). The outer arc surface of the needle (7) is connected to a transmission ring (810). There is a gap between the transmission ring (810) and the spring bracket (808). The bottom of the spring bracket (808) is connected to a constraint rope (811). The other end of the constraint rope (811) is connected to the bottom of the inner wall of the torsion spring housing (801).

8. The disposable safety insulin pen needle according to claim 7, characterized in that, The rotating rod (803) has a blade (812) on its side, the blade (812) facing the blocking protrusion (804), and the restraint rope (811) is located within the rotation range of the blade (812).

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