A dressing retention system

Abstract

The present invention relates to the field of medical devices, and specifically discloses a patch-type retention system, which at least includes a launch unit, a puncture unit and a patch-type retention unit, wherein a receiving cavity is provided at the bottom of the puncture seat, a plurality of elastic clamping arms are provided on the sidewall of the receiving cavity, and a convex portion is provided at the free end of the elastic clamping arm; an annular cavity is provided on the side of the puncture seat away from the receiving cavity; and an annular boss adapted to the annular cavity is provided in the launch unit. In the above structure, in the pre-launch state, the elastic clamping arm is deformed under the action of the convex portion, and the elastic clamping arm fixes the retention unit, and when the protective cover and the release paper are removed, the patch-type retention unit will not be separated from the puncture unit; in the puncture position, the elastic clamping arm is separated from the convex portion and restored to the initial state, and the elastic clamping arm is unfixed from the retention unit, so that the puncture unit can be separated from the patch-type retention unit more easily, and the skin will not be pulled by the patch-type retention unit.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to an application-type indwelling system. Background Art

[0002] The applicant's prior patent application CN113082362A discloses a split-type subcutaneous soft needle and a puncture method, wherein the split-type subcutaneous soft needle comprises a puncture assembly and a launch assembly, and the puncture assembly comprises an application unit and a puncture unit.

[0003] The above structure has the following technical defects:

[0004] (1) The puncture unit is provided with a cavity for accommodating the patch unit, and the cooperation between the patch unit and the cavity needs to meet the following requirements: in the preparation for firing, during the process of removing the protective sleeve and the isolation layer, the patch unit should remain in the cavity of the puncture unit; after firing, the patch unit should be left on the skin and the puncture unit should be removed and separated from the patch unit.

[0005] This requires that the fit between the application unit and the puncture unit should not be too loose or too tight. If the fit is too loose, the application unit is easily pulled out during the removal of the protective sleeve and the isolation layer. If the fit is too tight, the application unit is easily pulled on the skin during the removal of the puncture unit. Therefore, the precision fit between the application unit and the puncture unit is high, resulting in high production costs and low system stability.

[0006] (2) The application unit in the above structure includes a base and a subcutaneous soft needle. The subcutaneous soft needle is equipped with a protective sleeve. The protective sleeve is provided with a cavity corresponding to the subcutaneous soft needle. The starting part of the isolation layer corresponds to the protective sleeve. When the protective sleeve is separated from the subcutaneous soft needle along the axial direction, the starting part of the isolation layer moves along with the protective sleeve.

[0007] When the puncture assembly is combined with the firing assembly and is in the ready-to-fire position, the protective sleeve and the isolation layer need to be removed. The removal process is to apply axial tension to the protective sleeve so that it drives the isolation layer and the adhesive layer to separate. During this removal process, when the tension is applied to the protective sleeve, it cannot be ensured that the direction of the tension is always axial, causing the protective sleeve to contact the subcutaneous soft needle, thereby damaging the subcutaneous soft needle. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide a structurally improved application-type retention system to solve the corresponding technical defects in the prior art.

[0009] In order to solve the above technical problems, the technical solution provided by the present invention is as follows: an application-type retention system, at least comprising a launching unit, a puncture unit and an application-type retention unit, the puncture unit comprising a puncture seat and a puncture needle, a receiving cavity for accommodating the application-type retention unit is arranged at the bottom of the puncture seat, the puncture unit and the application-type retention unit have a pre-launch position and a puncture position in the launching unit, the application-type retention unit is gap-matched with the receiving cavity, a plurality of elastic clamping arms are arranged on the side wall of the receiving cavity, a convex portion is arranged on the free end of the elastic clamping arm away from the application-type retention unit; an annular cavity surrounding the receiving cavity is arranged on the side of the puncture seat away from the receiving cavity, the convex portion extends into the annular cavity; an annular boss adapted to the annular cavity is arranged in the launching unit, and in the pre-launch position, the annular boss enters the annular cavity and drives the free end of the elastic clamping arm to move toward the application-type retention unit.

[0010] In a preferred embodiment, a guide portion is provided on a side of the top of the protrusion away from the elastic clamping arm.

[0011] In a preferred embodiment, a first limiting step is provided on a side of the elastic clamping arm close to the dressing retention unit.

[0012] In a preferred embodiment, a second limiting step is disposed on the periphery of the application-type retention unit and is opposite to the first limiting step in the pre-launch position.

[0013] In a preferred embodiment, the dressing type retention unit at least comprises:

[0014] A retention seat base, wherein the retention seat base is provided with a needle seat and a threaded connection cavity surrounding the needle seat, wherein the threaded connection cavity is provided with an internal thread;

[0015] An indwelling soft needle, the indwelling soft needle is fixed on the needle seat;

[0016] An adhesive layer, the adhesive layer being fixed to a surface of one side of the indwelling seat base on which the indwelling soft needle is provided;

[0017] A protective sleeve, the protective sleeve at least comprising a sleeve for sleeved on the indwelling soft needle and a threaded connection end adapted to be connected to the internal thread of the threaded connection cavity; and

[0018] Release paper, the release paper covers the side of the adhesive layer away from the retention seat base, and the middle part of the release paper is sleeved on the sleeve and covers at least a part of the protective sleeve.

[0019] In a preferred embodiment, the release paper is provided with a cutting line extending spirally from a position close to the protective sleeve toward the periphery.

[0020] In a preferred embodiment, the protective sleeve also includes a ring platform located between the sleeve and the threaded connection end, a circular hole is provided in the middle of the release paper, the diameter of the circular hole is larger than the outer diameter of the sleeve and smaller than the outer diameter of the ring platform; a sink groove adapted to the ring platform is provided on the base of the retention seat, and the surface of the ring platform on one side of which the release paper is provided is flush with the surface of the adhesive layer.

[0021] In a preferred embodiment, a retention seat upper cover is provided on the side of the retention seat base away from the retention soft needle, and the outer diameter of the retention seat upper cover is larger than the outer diameter of the retention seat base and forms a second limiting step.

[0022] In a preferred embodiment, an anti-rotation structure is provided between the upper cover of the retention seat and the accommodating cavity, and the anti-rotation structure includes convex ribs and grooves that fit each other.

[0023] In a preferred embodiment, a sealing member is provided between the upper cover of the retention seat and the needle seat, and the puncture steel needle passes through the sealing member to cooperate with the retention soft needle.

[0024] Compared with the prior art, the patch-type indwelling system of this embodiment has the following beneficial effects:

[0025] (1) In the pre-launch position, the annular boss cooperates with the annular cavity to drive the free end of the elastic clamping arm to move toward the application-type retention unit, thereby holding the application-type retention unit tightly or limiting the application-type retention unit. In this way, when the protective cover or release paper is removed in the pre-launch state, the application-type retention unit will not be separated from the puncture unit.

[0026] In the puncture position, since the annular boss is disengaged from the annular cavity, there is a clearance fit between the application-type retention unit and the accommodating cavity of the puncture seat, so that the puncture unit can be separated from the application-type retention unit more easily without pulling the skin through the application-type retention unit.

[0027] With such a configuration, the requirements for the matching accuracy between the dressing retention unit and the puncture unit are greatly reduced, the production cost and the assembly cost are reduced accordingly, the yield rate is improved, and the system is more stable and reliable.

[0028] (2) The protective sleeve is threadedly connected to the base of the indwelling seat, wherein the threaded connection not only serves as a connection, but also serves as a guide, ensuring axial movement during removal of the protective sleeve, greatly reducing the risk of contact with the indwelling soft needle, and protecting the indwelling soft needle from damage.

[0029] (3) During the process of removing the protective sleeve and the release paper, a rotational driving force is applied to the protective sleeve. During the process of the rotational driving force driving the protective sleeve to move axially, the protective sleeve drives the release paper to separate from the adhesive layer, which can greatly reduce the tension acting on the protective sleeve when tearing off the release paper, and reduce the risk of separation of the application unit and the puncture unit during the removal of the protective sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the external structure of the dressing-type indwelling system of this embodiment;

[0031] Figure 2 This is a schematic diagram of the explosion state structure of the dressing type indwelling system of this embodiment;

[0032] Figure 3 is a schematic cross-sectional structural diagram of the dressing-type indwelling system of this embodiment in an initial state;

[0033] Figure 4 It is a cross-sectional structural schematic diagram of the dressing-type indwelling system of this embodiment running from the initial state to the pre-launch state;

[0034] Figure 5 This is a schematic diagram of the structure of the dressing-type indwelling system of this embodiment with the protective cover removed in the pre-launch state;

[0035] Figure 6 This is a schematic diagram of the structure of the patch-type indwelling system of this embodiment in which the protective cover and the release paper are removed in the pre-launch state;

[0036] Figure 7 is a schematic cross-sectional structural diagram of the dressing-type indwelling system of this embodiment in a pre-launch state;

[0037] Figure 8 for Figure 7 A partial enlarged structural schematic diagram of part A shown;

[0038] Fig. 9 for Figure 7 A schematic diagram of the cross-sectional structure of the state shown;

[0039] Fig.10 It is a structural schematic diagram of the dressing type indwelling system of this embodiment in the puncture state;

[0040] Fig.11 This is a schematic diagram of the structure of the dressing-type indwelling system of this embodiment in which the emitting unit and the puncture unit are removed after puncture;

[0041] Fig.12 This is a schematic diagram of the structure of the mounting bracket and the puncture unit in the dressing-type indwelling system of this embodiment;

[0042] Fig.13This is a schematic diagram of the top structure of the puncture unit in the dressing-type indwelling system of this embodiment;

[0043] Fig.14 This is a schematic diagram of the bottom structure of the puncture unit in the dressing-type indwelling system of this embodiment;

[0044] Fig.15a This is a schematic diagram of the structure of the puncture seat in the dressing-type indwelling system of this embodiment, wherein the elastic clamping arm is not deformed;

[0045] Fig.15b This is a schematic diagram of the structure of the puncture seat in the dressing-type indwelling system of this embodiment, wherein the elastic clamping arm has been deformed;

[0046] Fig.16 This is a schematic diagram of the cross-sectional structure of the puncture unit in the dressing-type indwelling system of this embodiment;

[0047] Fig.17 Schematic diagram of the cross-sectional structure of the dressing-type retention unit in this embodiment;

[0048] Fig.18 Schematic diagram of the three-dimensional structure of the dressing type retention unit in this embodiment;

[0049] Fig.19 Schematic diagram of the explosion state structure of the dressing type retention unit in this embodiment;

[0050] Fig. 20 Schematic diagram of the structure of the protective cover in the dressing type retention unit in this embodiment;

[0051] Fig.21 Schematic diagram of the structure of the release paper in the application-type retention unit in this embodiment. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0053] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be the internal connection of two components; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] like Figure 1 , Figure 2 As shown, a patch-type indwelling system of this embodiment includes a launch unit 30, a puncture unit 20 and a patch-type indwelling unit 10. The launch unit 30 includes a housing 31, a mounting bracket 32, a slider 33 and a spring 13. It should be noted that the structure and launch principle of the launch unit 30 are the same as those of the launch unit in the prior patent CN113082362A, and will not be described in detail here.

[0056] In this embodiment, Fig.14 As shown, the puncture unit 20 of this embodiment includes a puncture seat 21 and a puncture steel needle 22, wherein the bottom of the puncture seat 21 is provided with a receiving cavity 211 for receiving the dressing type retention unit 10. As a special feature of this embodiment, the dressing type retention unit 10 is gap-matched with the receiving cavity 211.

[0057] like Figure 13-14 As shown, in this embodiment, in the puncture seat 21, the side wall of the accommodating cavity 211 is provided with four elastic clamping arms 212 evenly distributed in the circumferential direction, and a convex portion 213 is provided on the side of the free end of the elastic clamping arm 212 away from the dressing type retention unit. Fig.15a As shown, the elastic clamping arm 212 is not deformed, and the free end of the elastic clamping arm 212 does not extend into the accommodating cavity 211 .

[0058] In this embodiment, an annular cavity 216 surrounding the accommodating cavity is disposed on a side of the puncture seat 21 away from the accommodating cavity 211 , and the convex portion 213 extends into the annular cavity 216 .

[0059] Correspondingly, an annular boss adapted to the annular cavity 216 is provided inside the emitting unit 30. Preferably, in this embodiment, the annular boss 320 is provided at the bottom of the mounting bracket 32. It should be noted that the annular boss can be provided not only at the bottom of the mounting bracket, but also at the inner side of the housing.

[0060] like Figure 7-Figure 9As shown, in the pre-launch position, the annular boss 320 enters the annular cavity 216, and the annular boss 320 drives the free end of the elastic clamping arm 212 to move toward the dressing retention unit 10 by squeezing the convex portion 213. The elastic clamping arm 212 is deformed as shown in FIG. Fig.15b As shown, its free end extends into the accommodating cavity 211 so that the elastic clamping arm 212 holds the dressing indwelling unit 10 tightly or forms a limit. In the pre-firing state, the dressing indwelling unit 10 and the puncture unit 20 are difficult to separate.

[0061] As a preference, Fig.13 As shown, in this embodiment, a guide portion 214 is provided on the top of the protrusion 213 away from the elastic clamping arm 212 . The guide portion 214 may be an inclined surface or an arc surface to reduce the resistance when the annular boss 320 enters the annular cavity 216 .

[0062] In this embodiment, as a preferred embodiment, Figure 8 , Fig.13 As shown, the elastic clamping arm 212 is provided with a first limiting step 215 on one side close to the dressing type retention unit 10. Figure 8 , Fig.17 As shown, the periphery of the dressing retention unit 10 is provided with a second limiting step 180 for being opposite to the first limiting step 215 in the pre-launch position. In the pre-launch state, since the first limiting step 215 and the second limiting step 180 are arranged opposite to each other, a limit is formed, and the dressing retention unit 10 cannot be separated from the accommodating cavity 211.

[0063] like Figure 17-Figure 19 As shown, an application-type retention unit of this embodiment includes a retention seat base 110, a retention soft needle 160, an adhesive layer 130, a protective sleeve 150, a release paper 140 and a retention seat upper cover 120.

[0064] Among them, the retention seat base 110 of this embodiment is provided with a needle seat 112 and a threaded connection cavity 113 surrounding the needle seat, and the threaded connection cavity is provided with an internal thread. The retention soft needle 160 is fixed on the needle seat 112, and the adhesive layer 130 is fixed on the side surface of the retention seat base 110 where the retention soft needle 160 is provided, and the release paper 140 covers the side of the adhesive layer 130 away from the retention seat base.

[0065] The release paper 140 of this embodiment is as follows Fig.21 As shown, a circular hole 142 is provided in the middle thereof, and two cutting lines 141 are provided which extend spirally from the position close to the protective cover 150 to the periphery. In the process of removing the release paper 140, the release paper is gradually separated along the spirally extending cutting lines 141. The purpose of such a setting is that in the process of removing the release paper, the removal force required is small, and the external force on the adhesive layer is more balanced.

[0066] It should be noted that, in this embodiment, two cutting lines are a preferred setting method and are not the only number limitation.

[0067] The protective cover 150 of this embodiment, such as Fig. 20 As shown, it includes a sleeve 151 for being sleeved on the indwelling soft needle 160 and a threaded connection end 153 for being adapted to be connected with the internal thread of the threaded connection cavity 113 , and the protective sleeve 150 is threadedly connected to the indwelling seat base 110 through the threaded connection end 153 .

[0068] Preferably, in this embodiment, a ring platform 152 is further provided between the sleeve 151 and the threaded connection end 153 of the protective sleeve 150, wherein the middle portion of the release paper 140 is sleeved on the sleeve 151 through the circular hole 142, and the diameter of the circular hole is larger than the outer diameter of the sleeve 151 and smaller than the outer diameter of the ring platform 152, so that a portion of the release paper covers the ring platform 152.

[0069] With such arrangement, when the protective cover 150 is removed, the release paper 140 does not affect the rotation of the protective cover 150. Instead, as the protective cover 150 moves axially, the middle portion of the release paper 140 moves axially away from the adhesive layer, and then gradually separates from the adhesive layer from the middle portion toward the periphery along the cutting line.

[0070] In this embodiment, a sink 111 adapted to the ring stage is provided on the retaining seat base 110. In the assembled state, the surface of the ring stage 152 provided with the release paper 140 is flush with the surface of the adhesive layer 130 to ensure that the release paper 140 is on the same plane.

[0071] In this embodiment, the retention seat upper cover 120 is installed on the side of the retention seat base 110 away from the retention soft needle, and the outer diameter of the retention seat upper cover 120 is larger than the outer diameter of the retention seat base 110, forming a second limiting step 180. In this embodiment, a seal 170 is provided between the retention seat upper cover 120 and the needle seat 112. Preferably, the seal can be rubber or silicone. After the application-type retention unit 10 of this embodiment is combined with the puncture unit 20, the puncture steel needle 22 passes through the seal 170 and the needle seat 112 in sequence and is located in the inner cavity of the retention soft needle 160.

[0072] Furthermore, an anti-rotation structure is provided between the dressing-type retention unit 10 and the puncture unit 20 of this embodiment. Fig.14 As shown, the inner wall of the accommodating cavity 211 of the puncture seat 21 is provided with two convex ribs 217, correspondingly, as shown in FIG. Fig.11 As shown, the retention seat upper cover 120 is provided with a groove 190 adapted to the convex rib 217 .

[0073] Figure 1 , Figure 3 The figure shows the initial state of the dressing indwelling system, in which the dressing indwelling unit 10, the puncture unit 20 and the emission unit are assembled in sequence, and a protective cover 40 is also threadedly connected to the puncture seat.

[0074] The steps for using the dressing-type indwelling system of this embodiment are as follows:

[0075] Step 1, such as Figure 4 As shown, by pressing the protective cover 40, the application-type retention unit 10 and the puncture unit 20 are moved to the pre-firing position, at which time, the spring in the firing unit 30 stores energy.

[0076] Step 2, such as Figure 5 As shown, the protective cover 40 is removed.

[0077] Step three, such as Figure 6 As shown, remove the protective cover 150 and the release paper 140. Figure 7-Figure 9 As shown, the application-type retention unit is limited in the accommodation cavity, and during the process of removing the protective cover 150 and the release paper 140, the application-type retention unit will not be separated from the accommodation cavity.

[0078] Step 4: Fire the firing unit. The position after firing is as follows: Fig.10 As shown, at this time, the annular boss is out of engagement with the annular cavity.

[0079] Step 5: Fig.11 As shown, the emitting unit and the puncture unit are removed, and the patch-type retention unit is retained on the skin. Since the annular boss is disengaged from the annular cavity, and the patch-type retention unit is gap-fitted with the accommodating cavity, the emitting unit and the puncture unit can be easily removed at this time without pulling the patch-type retention unit and the skin.

[0080] In short, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A patch-type indwelling system, comprising at least a launch unit, a puncture unit and a patch-type indwelling unit, wherein the puncture unit comprises a puncture seat and a puncture steel needle, a receiving cavity for accommodating the patch-type indwelling unit is provided at the bottom of the puncture seat, and the puncture unit and the patch-type indwelling unit have a pre-launch position and a puncture position in the launch unit, characterized in that: The patch-type retention unit is gap-matched with the accommodating cavity, and the side wall of the accommodating cavity is provided with a plurality of elastic clamping arms, and a convex portion is provided on the free end of the elastic clamping arm away from the patch-type retention unit; an annular cavity surrounding the accommodating cavity is provided on the side of the puncture seat away from the accommodating cavity, and the convex portion extends into the annular cavity; an annular boss adapted to the annular cavity is provided in the launching unit, and in the pre-launching position, the annular boss enters the annular cavity and drives the free end of the elastic clamping arm to move toward the patch-type retention unit.

2. The dressing-type indwelling system according to claim 1, characterized in that: A guide portion is arranged on one side of the top of the protrusion away from the elastic clamping arm.

3. The dressing-type indwelling system according to claim 1, characterized in that: A first limiting step is arranged on one side of the elastic clamping arm close to the dressing type retention unit.

4. The dressing-type indwelling system according to claim 3, characterized in that: The periphery of the application-type retention unit is provided with a second limiting step which is opposite to the first limiting step at the pre-launching position.

5. The dressing type indwelling system according to any one of claims 1 to 4, characterized in that: The dressing type retention unit at least comprises: A retention seat base, wherein the retention seat base is provided with a needle seat and a threaded connection cavity surrounding the needle seat, wherein the threaded connection cavity is provided with an internal thread; An indwelling soft needle, the indwelling soft needle is fixed on the needle seat; An adhesive layer, the adhesive layer being fixed to a surface of one side of the indwelling seat base on which the indwelling soft needle is provided; A protective sleeve, the protective sleeve at least comprising a sleeve for sleeved on the indwelling soft needle and a threaded connection end adapted to be connected to the internal thread of the threaded connection cavity; and Release paper, the release paper covers the side of the adhesive layer away from the retention seat base, and the middle part of the release paper is sleeved on the sleeve and covers at least a part of the protective sleeve.

6. The dressing-type indwelling system according to claim 5, characterized in that: The release paper is provided with a cutting line which spirally extends from a position close to the protective sleeve toward the periphery.

7. The dressing-type indwelling system according to claim 5, characterized in that: The protective sleeve also includes a ring platform located between the sleeve and the threaded connection end, a circular hole is provided in the middle of the release paper, the diameter of the circular hole is larger than the outer diameter of the sleeve and smaller than the outer diameter of the ring platform; a sink groove adapted to the ring platform is provided on the base of the retention seat, and the surface of the ring platform on one side of which the release paper is provided is flush with the surface of the adhesive layer.

8. The dressing-type indwelling system according to claim 5, characterized in that: A retention seat upper cover is arranged on the side of the retention seat base away from the retention soft needle. The outer diameter of the retention seat upper cover is larger than the outer diameter of the retention seat base and forms a second limiting step.

9. The dressing-type indwelling system according to claim 8, characterized in that: An anti-rotation structure is arranged between the upper cover of the retention seat and the accommodating cavity, and the anti-rotation structure includes convex ribs and grooves that are adapted to each other.

10. The dressing-type indwelling system according to claim 8, characterized in that: A sealing member is provided between the upper cover of the retention seat and the needle seat, and the puncture steel needle passes through the sealing member and cooperates with the retention soft needle.

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