CN219743545U - Disposable self-help needle type indwelling infusion device - Google Patents

Abstract

The utility model discloses a disposable self-help needle type indwelling infusion device, which comprises a shell, a locking mechanism, a boosting mechanism, a hard puncture needle, a soft indwelling needle, a guiding mechanism and a limiting mechanism, wherein the guiding mechanism comprises a first sliding block, a second sliding block and a linear sliding rail, the first sliding block and the second sliding block are respectively and slidably connected onto the linear sliding rail, one end of the hard puncture needle is connected with the first sliding block, the other end of the hard puncture needle stretches into a needle outlet channel, one end of the soft indwelling needle stretches into the needle outlet channel after penetrating through a block through hole of the first sliding block and a needle body channel of the hard puncture needle, the soft indwelling needle is fixed with the second sliding block, the boosting mechanism has an elastic trend of pushing the first sliding block to be close to the needle outlet channel along the linear sliding rail and then to be far away from the needle outlet channel, the second sliding block can be pushed by the first sliding block to be close to the needle outlet channel and limited by the limiting mechanism, and the complexity of the whole operation is low.

Description

Disposable self-help needle type indwelling infusion device

[ field of technology ]

The utility model relates to the technical field of infusers, in particular to the technical field of disposable self-help needle type indwelling infusers.

[ background Art ]

Diabetes is a metabolic disease characterized by elevated blood glucose due to insulin secretion deficiency or insulin action disorder. The insulin pump is a novel special medical apparatus for treating diabetes, and is mainly composed of a pump body, an infusion device, a medicine storage device, a catheter and other parts, and can infuse trace insulin into a patient at intervals of a small period of time according to manual setting so as to achieve the aim of assisting in controlling blood sugar. Specifically, the pump body may be used as a power component to gradually deliver the medical fluid in the reservoir to the infuser via the catheter, and the infuser may then introduce the medical fluid subcutaneously.

Conventional infusers typically employ a rigid spike that penetrates the skin to form an infusion path for insulin, such as a novel infusion line for insulin pumps and microinjection pumps as disclosed in the patent publication CN109481781 a. However, rigid lancets are resistant to some patients because of their strong subcutaneous foreign body sensation, resulting in poor infusion comfort.

In order to improve infusion comfort and avoid repeated needle insertion of patients, many manufacturers currently choose to replace hard needles with soft indwelling needles which can be placed subcutaneously, such as a single-use insulin pump infusion device disclosed in the patent with publication number CN211584636U and a single-use insulin pump infusion device disclosed in the patent with publication number CN 205126992U. However, the conventional infusion set with a soft indwelling needle requires that a patient firstly uses a hard puncture needle to assist the soft indwelling needle to puncture the skin and then rapidly pulls out the hard puncture needle, and has the problem that the operation of the whole needle insertion process is complex, which is very unfriendly to the elderly patient who operates alone. Accordingly, there is a need for improvements in the structure of infusers to reduce the complexity of the needle insertion procedure.

[ utility model ]

The utility model aims to solve the problems in the prior art and provides a disposable self-help needle type indwelling type infusion device which can automatically enable a hard needle to be pulled out and a soft indwelling needle to be still placed under the skin and used as an infusion channel to realize insulin infusion.

In order to achieve the above-mentioned purpose, the utility model proposes a disposable self-help needle type indwelling infusion set, including chassis, locking mechanism, boosting mechanism, hard needle, soft indwelling needle, guiding mechanism and limiting mechanism, the shell wall department of the said chassis has needle-out channel that can connect shell cavity and external, the said guiding mechanism includes the first slide block, second slide block and linear slide rail, the said first slide block and second slide block are slidably connected on linear slide rail separately, the needle wall department of the said hard needle has through grooves that can connect needle-out channel and external and set up along length direction, one end of the said hard needle is connected with first slide block and another end stretches into needle-out channel, one end of the said soft indwelling needle is connected with external medicine reservoir and another end stretches into shell cavity of the chassis and stretches into needle-out channel after passing through the block through hole of the first slide block and needle-out channel of the hard needle, the said soft needle-retaining needle is fixed with second slide block, the said boosting mechanism has the trend of pushing the first slide block and first slide rail and the elastic needle-out channel and can be kept away from the first slide block and the needle-out channel along with the linear slide rail and the first slide rail and the elastic needle-out channel is located by the first slide block and the other side of the needle-out channel is not limited by the locking mechanism and can be released from the needle.

Preferably, the casing comprises a casing body and a casing cover, a top opening of the casing body is closed by the casing cover, the locking mechanism comprises a base barrel, a locking plate, a base column and a locking spring, the base barrel is fixed in a casing cavity of the casing body, one end of the base column extends into a barrel body channel of the base barrel, the other end of the base column extends out of the casing cover, the locking plate is arranged outside the base column, and the locking spring is positioned in the barrel body channel of the base barrel, has a shrinking elastic tendency in an initial state and can pull down the locking plate to limit the release elasticity of the locking mechanism.

Preferably, a sliding groove is arranged in the base column, the sliding groove is in an inverted V shape, the free end of the first groove section is located between the free end of the second groove section and the connecting end of the first groove section and the second groove section, one end of the locking spring is fixed with the base column, the other end of the locking spring is slidably connected in the sliding groove, and the locking spring is located at the free end of the first groove section in an initial state.

Preferably, the casing further comprises an error touch prevention cover, and the error touch prevention cover is arranged at the top of the casing cover and covers the base column.

Preferably, the boosting mechanism comprises a rotating shaft, a boosting spring and a link rod, one end of the rotating shaft is rotatably connected with the shell body, a shaft body step part which can be matched with and abutted against the locking plate is arranged on the other end of the rotating shaft, and two ends of the link rod are respectively hinged with the rotating shaft and the first sliding block.

Preferably, an outward extending outer protruding portion is further arranged on the rotating shaft, and the outer protruding portion is hinged with the connecting rod.

Preferably, the limiting mechanism comprises a supporting seat and a limiting clamping piece, the limiting clamping piece is suspended in a shell cavity of the shell body through the supporting seat, and a block step part which can be matched with and abutted against the limiting clamping piece is arranged on the second sliding block.

Preferably, a guide groove is formed in the second sliding block, and the hard puncture needle and the soft retention needle are both arranged through the guide groove.

Preferably, the needle outlet channel is curved.

Preferably, the needle outlet device further comprises an application, wherein the application is fixed with the shell and is provided with a notch corresponding to the needle outlet channel.

The utility model has the beneficial effects that:

1) The first sliding block, the second sliding block and the linear sliding rail are arranged to form a guide mechanism together and are connected with the shell, the locking mechanism, the boosting mechanism, the hard puncture needle, the soft retention needle and the limiting mechanism for use, the elasticity of the boosting mechanism can be locked before use by the locking mechanism, the first sliding block and the second sliding block are simultaneously pushed to move outwards along the linear sliding rail by the boosting mechanism when the locking mechanism is unlocked so as to enable the hard puncture needle and the soft retention needle to synchronously puncture the skin, and the retraction of the second sliding block is limited by the limiting mechanism so that the boosting mechanism can only pull the first sliding block to return to the original position, thereby the hard puncture needle is pulled out, the soft retention needle is still left under the skin and is used as an infusion channel for realizing insulin infusion, the whole structure is simple, the complexity of operation is lower, a patient can finish the infusion needle operation by one key, and the use comfort is higher;

2) The locking mechanism is formed by the base barrel, the locking plate, the base column and the locking spring, the base column can be used for triggering the needle injection stroke, and the inverted V-shaped sliding groove in the base column is used for limiting the movable range of the locking spring, so that the locking plate can be automatically retracted downwards or sprung upwards before and after the base column is pressed, and the elastic quick locking and releasing of the boosting mechanism are realized;

3) The boosting mechanism is formed by the rotating shaft, the boosting spring and the connecting rod together, and the boosting spring can be used for providing energy for the whole needle injection action, so that the boosting spring is matched with the connecting rod to force the first sliding block and the second sliding block to smoothly slide along the linear sliding rail in the process of driving the rotating shaft to rotate by utilizing elasticity.

The features and advantages of the present utility model will be described in detail by way of example with reference to the accompanying drawings.

[ description of the drawings ]

FIG. 1 is a schematic perspective view of a disposable self-service needle indwelling infusion device according to the present utility model;

FIG. 2 is a schematic perspective view of a disposable self-needle indwelling infusion device according to the present utility model from another perspective;

FIG. 3 is a top view of the disposable self-service needle indwelling infusion device of the present utility model;

FIG. 4 is a cross-sectional view taken along A-A of FIG. 3;

FIG. 5 is an exploded view of the disposable self-service needle indwelling infusion device of the present utility model;

FIG. 6 is a schematic view of the initial state of the disposable self-service needle indwelling infusion device according to the present utility model;

FIG. 7 is a top view of FIG. 6;

FIG. 8 is a schematic view of the needle-like state of the disposable self-needle indwelling infusion device according to the present utility model;

FIG. 9 is a top view of FIG. 8;

FIG. 10 is a schematic view of the final state of the disposable self-needle indwelling infusion device according to the present utility model;

FIG. 11 is a top view of FIG. 10;

FIG. 12 is a schematic view of the locking mechanism of the disposable self-service needle indwelling infusion device according to the present utility model in a locked state;

fig. 13 is a schematic view of the locking mechanism of the disposable self-service needle indwelling infusion device according to the present utility model in an unlocked state.

In the figure: 1-casing, 11-casing, 111-needle outlet channel, 12-casing cover, 13-anti-false touch cover, 2-locking mechanism, 21-base barrel, 22-locking plate, 23-base post, 231-sliding groove, 2311-first groove section, 2312-second groove section, 24-locking spring, 3-boosting mechanism, 31-rotating shaft, 311-shaft body step part, 312-outer protrusion, 32-boosting spring, 33-link rod, 4-hard puncture needle, 5-soft retention needle, 6-guiding mechanism, 61-first sliding block, 62-second sliding block, 621-block step part, 622-guiding groove, 63-linear sliding rail, 7-limiting mechanism, 71-outer protrusion, 72-limiting clamp, 8-application and 81-notch.

[ detailed description ] of the utility model

Referring to fig. 1 to 13, the disposable self-help needle indwelling infusion set of the present utility model comprises a housing 1, a locking mechanism 2, a boosting mechanism 3, a hard needle 4, a soft indwelling needle 5, a guiding mechanism 6 and a limiting mechanism 7, wherein a needle outlet channel 111 capable of communicating a housing cavity with the outside is arranged at the housing wall of the housing 1, the guiding mechanism 6 comprises a first slider 61, a second slider 62 and a linear slide rail 63, the first slider 61 and the second slider 62 are respectively and slidingly connected on the linear slide rail 63, a through groove capable of communicating a needle body channel with the outside and arranged along the length direction is arranged at the needle wall of the hard needle 4, one end of the hard needle 4 is connected with the first slider 61, the other end extends into the needle outlet channel 111, one end of the soft indwelling needle 5 is connected with an external medicine storage device, the other end extends into the housing cavity of the housing 1 and then extends into the needle outlet channel 111 after passing through a block through hole of the first slider 61 and the needle body channel of the hard needle 4, the soft needle retaining mechanism 62 is further pushed by the soft needle channel 62 and the soft needle channel 5 is further pushed by the soft needle channel 62 towards the first slider 61, the first slider 62 is further pushed by the elastic needle mechanism to the first slider 3 along the linear slide rail 111, the first needle channel is further limited by the first slider 3, the needle channel is further pushed by the elastic needle mechanism 4 along the first slider 3, and the first slider is further pushed by the first slider 61 and the first slider is far away from the first side channel (111) is further kept away from the first side from the first channel (111) and is further limited by the first needle channel (1) and is further pushed by the elastic needle channel (1) is further separated from the needle channel is separated by the needle channel is a needle 1). Specifically, the hard lancet 4 may be a hollow needle having a semicircular cross section.

The casing 1 comprises a casing body 11 and a casing cover 12, a top opening of the casing body 11 is closed by the casing cover 12, the locking mechanism 2 comprises a base barrel 21, a locking plate 22, a base post 23 and a locking spring 24, the base barrel 21 is fixed in a casing cavity of the casing body 11, one end of the base post 23 stretches into a barrel body channel of the base barrel 21, the other end stretches out of the casing cover 12, the locking plate 22 is arranged outside the base post 23, and the locking spring 24 is positioned in the barrel body channel of the base barrel 21 and has a shrinkage elastic trend in an initial state and can pull down the locking plate 22 to limit the release elasticity of the locking mechanism 2.

The base post 23 is internally provided with a chute 231, the chute 231 is in an inverted V shape, the free end of the first chute section 2311 is located between the free end of the second chute section 2312 and the connection end of the first chute section 2311 and the second chute section 2312, one end of the locking spring 24 is fixed with the base post 23, and the other end is slidably connected in the chute 231 and is located at the free end of the first chute section 2311 in an initial state.

The casing 1 further comprises an anti-false touch cover 13, and the anti-false touch cover 13 is arranged on the top of the casing cover 12 and covers the base column 23. The anti-false touch cover 13 can isolate the base column 23, so as to effectively avoid false triggering of the base column 23.

The boosting mechanism 3 comprises a rotating shaft 31, a boosting spring 32 and a link rod 33, one end of the rotating shaft 31 is rotatably connected with the shell 11, a shaft body step part 311 which can be matched with and abutted against the locking plate 22 is arranged on the other end of the rotating shaft, and two ends of the link rod 33 are respectively hinged with the rotating shaft 31 and the first sliding block 61.

An outward extending outer protrusion 312 is further disposed on the rotating shaft 31, and the outer protrusion 312 is hinged to the link 33.

The limiting mechanism 7 comprises a supporting seat 71 and a limiting clamping piece 72, the limiting clamping piece 72 is suspended in a shell cavity of the shell 11 through the supporting seat 71, and a block step 621 which can be matched with and abutted against the limiting clamping piece 72 is arranged on the second sliding block 62.

The second slider 62 is provided with a guide groove 622, and the hard puncture needle 4 and the soft retention needle 5 are both arranged to penetrate through the guide groove 622.

The needle outlet passage 111 is curved. The rigid lancet needle 4 is made of metal, which is sufficiently rigid to pierce the skin and which is automatically bent along the curved needle channel 111 during pushing.

The device also comprises an application 8, wherein the application 8 is fixed with the shell 1 and is provided with a notch 81 corresponding to the needle outlet channel 111. Wherein the application 8 may be a low-sensitive adhesive tape to fix the casing 1 and other components mounted therein.

The working process of the utility model comprises the following steps:

in use, first, the release paper of the application 8 is torn off and stuck over the skin with the outlet of the needle exit channel 111 facing the desired penetration site. Then, the anti-false touch cover 13 is removed, and the base column 23 is pressed downwards, so that the needle injection operation can be automatically completed.

Referring to fig. 12, before the base post 23 is pressed, the locking spring 24 is in a compressed state and the sliding end is located at the free end of the first slot segment 2311, so that the locking piece 22 can be pulled down by using elastic force to make the locking piece 22 abut against the shaft body step 311 of the rotating shaft 31, thereby locking the boosting mechanism 3. During the pressing of the base post 23, the locking spring 24 is further compressed and the sliding end slides from the free end of the first slot segment 2311 to the free end of the second slot segment 2312. Referring to fig. 13, when the base post 23 is released, the lock spring 24 can spring up the base post 23 with an elastic force so that the lock piece 22 no longer abuts against the shaft body step portion 311 of the rotation shaft 31, thereby enabling the booster mechanism 3 to release the elasticity.

Referring to fig. 6 and 7, before the base 23 is pressed, the boosting mechanism 3 is locked and elastic by the locking mechanism 2, and the first slider 61 and the second slider 62 are located at one end of the linear sliding rail 63 near the boosting mechanism 3. When the base post 23 is pressed, the boosting spring 32 drives the rotating shaft 31 to rotate anticlockwise by using the elastic force and cooperates with the link rod 33 to push the first slider 61 and the second slider 62 to gradually approach the needle outlet channel 111 along the linear sliding rail 63, so that the hard puncture needle 4 and the soft retention needle 5 penetrate the skin together, as shown in fig. 8 and 9. When the rotation shaft 31 rotates counterclockwise until the outer convex portion 312 and the link 33 are positioned on the same line, the first slider 61 and the second slider 62 are pushed out to the farthest distance along the linear slide rail 63 by the booster mechanism 3. Referring to fig. 10 and 11, when the rotating shaft 31 continues to rotate anticlockwise, the first slider 61 can gradually return to the original position along the linear sliding rail 63 under the pulling action of the link rod 33 and drive the hard lancet 4 to extend out of the skin, and the second slider 62 only keeps static in place and keeps the soft retention needle 5 to remain subcutaneous.

The above embodiments are illustrative of the present utility model, and not limiting, and any simple modifications of the present utility model fall within the scope of the present utility model.

Claims (10)

1. Disposable self-service needle formula of remaining in formula infusion ware, its characterized in that: comprises a machine shell (1), a locking mechanism (2), a boosting mechanism (3), a hard needle (4), a soft detaining needle (5), a guiding mechanism (6) and a limiting mechanism (7), wherein a needle outlet channel (111) which can be communicated with a shell cavity and the outside is arranged at the shell wall of the machine shell (1), the guiding mechanism (6) comprises a first sliding block (61), a second sliding block (62) and a linear sliding rail (63), the first sliding block (61) and the second sliding block (62) are respectively and slidingly connected onto the linear sliding rail (63), a through groove which can be communicated with a needle body channel and the outside and is arranged along the length direction is arranged at the needle wall of the hard needle (4), one end of the hard needle (4) is connected with the first sliding block (61) while the other end extends into the needle outlet channel (111), one end of the soft detaining needle (5) is connected with an external medicine storage device while the other end extends into the shell cavity of the machine shell (1) and after penetrating through a through hole of the first sliding block (61) and the hard needle (4) and the hard needle outlet channel (111) respectively, the soft detaining needle (4) is pushed away from the first sliding rail (111) along the linear sliding rail (111) and is further away from the first sliding rail (111) and is kept away from the soft needle (3), the boosting mechanism (3) is locked or released elastically by the locking mechanism (2), and the second sliding block (62) is positioned on one side of the first sliding block (61) facing the needle outlet channel (111) and can be pushed by the first sliding block (61) to be close to the needle outlet channel (111) and can be limited by the limiting mechanism (7) without being separated from the needle outlet channel (111) along with the first sliding block (61).

2. The disposable self-service needle indwelling infusion set according to claim 1, wherein: the casing (1) comprises a casing body (11) and a casing cover (12), a top opening of the casing body (11) is closed by the casing cover (12), the locking mechanism (2) comprises a base barrel (21), a locking plate (22), a base column (23) and a locking spring (24), the base barrel (21) is fixed in a casing cavity of the casing body (11), one end of the base column (23) stretches into a barrel body channel of the base barrel (21) while the other end stretches out of the casing cover (12), the locking plate (22) is mounted outside the base column (23), and the locking spring (24) is located in the barrel body channel of the base barrel (21) and has a shrinkage elastic trend in an initial state and can pull down the locking plate (22) to limit the release elasticity of the locking mechanism (2).

3. The disposable self-service needle indwelling infusion set according to claim 2, in which: be equipped with spout (231) in foundation column (23), spout (231) are the free end of reverse V font and first slot segment (2311) is located between the free end of second slot segment (2312) and the link of first slot segment (2311) and second slot segment (2312), the one end and foundation column (23) of locking spring (24) are fixed and the other end sliding connection is in spout (231) and be located the free end department of first slot segment (2311) under initial condition.

4. A disposable self-service needle indwelling infusion set according to claim 3, in which: the shell (1) further comprises an error touch prevention cover (13), and the error touch prevention cover (13) is arranged at the top of the shell cover (12) and covers the base column (23).

5. The disposable self-service needle indwelling infusion set according to claim 2, in which: the boosting mechanism (3) comprises a rotating shaft (31), a boosting spring (32) and a connecting rod (33), one end of the rotating shaft (31) is rotatably connected with the shell body (11), a shaft body step part (311) which can be matched with and abutted against the locking plate (22) is arranged on the other end of the rotating shaft, and two ends of the connecting rod (33) are hinged with the rotating shaft (31) and the first sliding block (61) respectively.

6. The disposable self-service needle indwelling infusion set according to claim 5, in which: an outward extending outer protruding portion (312) is further arranged on the rotating shaft (31), and the outer protruding portion (312) is hinged with the connecting rod (33).

7. The disposable self-service needle indwelling infusion set according to claim 2, in which: the limiting mechanism (7) comprises a supporting seat (71) and a limiting clamping piece (72), the limiting clamping piece (72) is suspended in a shell cavity of the shell body (11) through the supporting seat (71), and a block step part (621) which can be matched with and abutted against the limiting clamping piece (72) is arranged on the second sliding block (62).

8. The disposable self-service needle indwelling infusion set according to claim 1, wherein: the second sliding block (62) is provided with a guide groove (622), and the hard puncture needle (4) and the soft retention needle (5) are both arranged through the guide groove (622).

9. The disposable self-service needle indwelling infusion set according to claim 1, wherein: the needle outlet channel (111) is curved.

10. The disposable self-needle indwelling infusion set according to any one of claims 1 to 9, wherein: the novel needle outlet device is characterized by further comprising an application (8), wherein the application (8) is fixed with the machine shell (1) and is provided with a notch (81) corresponding to the needle outlet channel (111).