Indwelling Device

Abstract

The present invention provides an indwelling device that can be stably indwelled on the body surface of a living body. The indwelling device (10) comprises: a main body (14); a main body side adhesive sheet (42); and a plate-shaped intermediate component (50) that is elastically deformable and stacked between the main body (14) and the main body side adhesive sheet (42). The intermediate component (50) comprises a base (52), a central sheet (56) and an arm sheet (58) extending side by side from the base (52). The intermediate component (50) is bonded to the main body side adhesive sheet (42) in the range from the base (52) to the central sheet (56), and is bonded to the main body (14) in the range from the base (52) to the arm sheet (58). In addition, the central sheet (56) is not bonded to the main body (14), and the arm sheet (58) is not bonded to the adhesive component.

Description

Technical Field

[0001] The present invention relates to an indwelling device indwelling on the body surface of a living body. Background Art

[0002] Patent document 1 discloses a drug delivery device (indwelling device) that is indwelled on the body surface in order to deliver a drug solution into the body of a living being. The indwelling device has a main body that supplies the drug solution and an adhesive sheet that is attached to the bottom surface of the main body and then attached to the body surface to indwell the main body.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2013-63105 Summary of the invention

[0006] In order to be able to stick this indwelling device on the body surface of various patients, the main body of the indwelling device has a flat bottom surface. However, since the main body is stuck to a curved part of the body surface, the followability to the body surface is poor. Therefore, there is a concern that the main body may peel off from the sticking part (or the sticking part may detach from the body surface) in the case of long-term indwelling.

[0007] In order to deal with this problem, in the indwelling device of Patent Document 1, the outer shell of the main body has a plastic region, and the outer shell itself can be deformed in coordination with the curved shape of the body surface. However, in the case of such a structure that the outer shell itself is deformed, other problems such as the complexity of the device and the increase in manufacturing cost are caused.

[0008] The present invention relates to the above-mentioned indwelling device technology, and an object of the present invention is to provide an indwelling device that can be stably indwelled on the body surface of a living body with a simple structure.

[0009] In order to achieve the above-mentioned purpose, an indwelling device in one embodiment of the present invention comprises: a main body; a sheet-like adhesive component, which is used to make the main body be indwelled on the body surface of a living body; and a plate-like intermediate component, which is elastically deformable and stacked between the main body and the adhesive component, the intermediate component having a base, and a first extension portion and a second extension portion extending from the base side by side with each other, a first adhesive portion bonded to the adhesive component is provided on a surface of the intermediate component on the side of the adhesive component in a range from the base to the first extension portion, and a second adhesive portion bonded to the main body is provided on a surface of the intermediate component on the side of the main body in a range from the base to the second extension portion, the first extension portion is not bonded to the main body, and the second extension portion is not bonded to the adhesive component.

[0010] Effects of the Invention

[0011] The above-mentioned indwelling device can be stably indwelled on the body surface of a living body with a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a perspective view showing the overall structure of an indwelling device (drug administration device) according to one embodiment of the present invention.

[0013] Figure 2 It is an exploded perspective view showing the retention structure of the main body.

[0014] Figure 3 It is a plan view showing a state where the main body-side adhesive sheet, the intermediate member, the lower adhesive body, and the upper adhesive body are stacked.

[0015] Figure 4A is a side sectional view showing a state where the main body is placed on the body surface, Figure 4B It is a partial stereoscopic view showing the position of the main body and the main body side adhesive sheet in the retention state. Figure 4C This is a partial stereoscopic diagram showing the action when an external force is applied to the main body.

[0016] Figure 5 It is an exploded perspective view showing the retention structure of the first modified example.

[0017] Figure 6 It is an exploded perspective view showing the retention structure of the second modified example.

[0018] Figure 7 It is an exploded perspective view showing the retention structure of the third modified example.

[0019] Fig. 8A is a top view showing the retention structure of the fourth variant, Figure 8B is a top view showing the retention structure of the fifth variant, Figure 8C is a top view showing the retention structure of the sixth variant, Fig.8D It is a top view showing the retention structure of the 7th variant.

[0020] Description of Reference Numerals

[0021] 10…Indwelling appliances

[0022] 12…Medicine delivery device

[0023] 14…Main body

[0024] 20…Housing

[0025] 22…Bottom

[0026] 23…Operation Department

[0027] 42…Main body side adhesive sheet

[0028] 50, 50A~50G…Intermediate parts

[0029] 52…base

[0030] 54, 54A, 54B…elastic sheet

[0031] 56, 56A~56C…Central piece

[0032] 56a…Intermediate part side exposed hole

[0033] 58, 58A~58C…arm piece

[0034] 60, 60A~60C… lower adhesive body

[0035] 70, 70A~70C…upper adhesive body

[0036] 80…Bridge Construction Department

[0037] C…Gap

[0038] Ce…Edge DETAILED DESCRIPTION

[0039] The present invention will be described in detail below by giving preferred embodiments thereof with reference to the accompanying drawings.

[0040] The indwelling device 10 according to one embodiment of the present invention will be described representatively. Figure 1 The medicine delivery device 12 shown. The medicine delivery device 12 is a medical device that is indwelled on the patient's body surface by a medical practitioner or the like and automatically delivers medicine into the body in the indwelling state. In addition, the indwelling device 10 of the present invention is not limited to the medicine delivery device 12, and can be applied to various devices indwelled on the body surface of a living body. As such a device, for example, a component measuring device such as a blood glucose meter, a biosensor or other medical device, or a terminal other than a medical device such as an information processing device and a communication device can be cited.

[0041] The drug administration device 12 includes a main body 14 as a drug supply source, a tube 16 connected to the main body 14, and a delivery portion 18 connected to the tube 16 and delivering the drug solution supplied from the tube 16 to the patient. That is, in the drug administration device 12, the main body 14 and the delivery portion 18 are connected to each other via the tube 16, thereby ensuring a certain degree of mutual freedom. Therefore, when the drug administration device 12 is placed in a living body, the main body 14 and the delivery portion 18 can be easily and correctly positioned at a desired position on the body surface.

[0042] The main body 14 of the drug delivery device 12 includes a container for storing drugs, a mechanism for delivering drugs from the container to the tube 16 at an appropriate time, a control unit for controlling the operation of the mechanism, and power supplies for the mechanism and the control unit (all not shown). Drugs delivered by the drug delivery device 12 include liquid medicines such as antibody drugs, anticancer drugs, chemotherapy drugs, anesthetic drugs, antibiotics, insulin, blood preparations, and nutrients. In addition, the main body 14 has a housing 20 that accommodates these components.

[0043] The housing 20 is configured as a substantially square housing that is relatively large in a rectangular shape when viewed from above and is low in the thickness direction. The dimensions of the housing 20 are set, for example, to have a length in the long side direction of 30 mm to 150 mm, a length in the short side direction of 10 mm to 100 mm, and a thickness in the range of 5 mm to 20 mm.

[0044] The bottom portion 22 of the housing 20, which is located on the retention side (the adhesion target site) of the body surface, is formed in a flat shape. In addition, the bottom portion 22 can also be formed as a slightly curved surface according to the shape of the body surface to be retained. The four sides of the bottom portion 22 are continuous in an R shape relative to the four side portions 24 of the housing 20, and the corners where the sides intersect with each other are also formed in an R shape. The housing 20 (main body 14) constitutes a part of the retention structure 40 and is retained on the body surface.

[0045] In addition, an operating portion 23 for operating the main body 14 is provided on the bottom surface 22. The operating portion 23 of the present embodiment is configured as a round button. The main body 14 is configured so that the power is turned off in the product providing state, and once it is turned on by pressing the operating portion 23 by the user, the control unit causes the main body 14 to continue to operate. The operating portion 23 is not limited to a configuration for performing a power on / off operation, and can be applied to various configurations for operating the indwelling device 10. The main body 14 may also have the operating portion 23 at a position other than the bottom surface 22 of the housing 20, and may also be configured without the operating portion 23 when operating through external communication or the like.

[0046] The housing 20 is preferably made of a hard resin material that is not elastically deformable. The resin material of the housing 20 is not particularly limited, but for example, thermoplastic resins such as polyacetal, polyamide, polyester, polycarbonate, polysulfone, polytetrafluoroethylene, polyphenylene sulfide, and polypropylene can be used. In addition, the shape of the housing 20 is not limited to a substantially square shape, and various shapes such as a cubic shape, a hemispherical shape, and other three-dimensional shapes can be adopted.

[0047] A main body side connector 26 for connecting to the tube 16 is provided at one end in the longitudinal direction (arrow A direction) of the housing 20. The main body side connector 26 protrudes short from the side surface 24a at one end of the housing 20. An assembly structure for assembling the tube 16 is formed on the outer peripheral surface of the main body side connector 26.

[0048] The tube 16 of the drug delivery device 12 is a flexible tube extending to a predetermined length and having a flow passage 16a inside which the drug can flow. The length of the tube 16 is not particularly limited, but is set to a range of about 10 mm to 100 mm, for example. A tube side connector 28 that can be detached from the main body side connector 26 is bonded to one end of the tube 16. In addition, the delivery unit 18 is fixed to the other end of the tube 16.

[0049] The tube-side connector 28 has a hollow needle (not shown) that allows the storage space of the container to communicate with the flow path 16 a of the tube 16 when the tube-side connector 28 is attached to the body-side connector 26 .

[0050] The delivery unit 18 of the drug delivery device 12 delivers drugs to the patient via a catheter 30 inserted from the body surface into the body (subcutaneously). Before the catheter 30 is placed in the patient, the delivery unit 18 is assembled with an insertion device 32, and the inner needle 34 of the insertion device 32 penetrates the catheter 30 ( Figure 1 In order to facilitate understanding of the present invention, the delivery section 18 and the insertion device 32 are shown in a separated state. The user punctures the catheter 30 and the multiple needles of the inner needle 34 overlapped in the body, and removes the inner needle 34 from the catheter 30 in the punctured state (disconnects the insertion device 32 from the delivery section 18), thereby leaving the catheter 30 indwelling in the patient.

[0051] Specifically, the delivery section 18 includes a catheter 30, a tube holder 36 that holds the proximal end of the catheter 30 and connects the tube 16, and an delivery section-side adhesive sheet 38 that adheres the tube holder 36 to the body surface.

[0052] Next, refer to Figure 1 to Figure 3 The indwelling structure 40 for indwelling the main body 14 of the drug delivery device 12 (indwelling device 10) on the body surface is described. The indwelling structure 40 includes: a shell 20 of the main body 14; a main body side adhesive sheet 42 (adhesive component) for adhering the main body 14 to the body surface of the living body; and a plate-shaped intermediate component 50 stacked between the main body 14 and the main body side adhesive sheet 42.

[0053] The main body side adhesive sheet 42 is roughly rectangular in shape when viewed from above, corresponding to the shape of the bottom face 22 of the housing 20, and has softness (flexibility) that can follow the body surface. The main body side adhesive sheet 42 is formed longer in the long side direction and the short side direction than the bottom face 22. The long side direction of the main body side adhesive sheet 42 is formed into an arc shape with a slightly bulging central portion in the short side direction. The short side direction of the main body side adhesive sheet 42 is connected to the long side direction via an R-shaped corner portion, and is parallel to each other and extends in a straight line.

[0054] A pair of corners of the main body side adhesive sheet 42 at one end in the long side direction are formed into rounded corners with a small radius of curvature. A pair of corners of the main body side adhesive sheet 42 at the other end in the long side direction are formed into rounded corners with a large radius of curvature. A short protrusion 42a is connected to the short side central portion of the main body side adhesive sheet 42 at the other end in the long side direction. In addition, a side exposure hole 42b of the adhesive component is provided at a position slightly closer to the end in the long side direction than the long side central portion of the main body side adhesive sheet 42 to expose the operating portion 23 of the housing 20.

[0055] The upper surface of the main body side adhesive sheet 42 has a fixing area 44 for the main body 14 in a range extending from one end in the long side direction to the central part in the long side direction. The fixing area 44 is consistent with the bonding range of the intermediate component 50. In addition, the main body side adhesive sheet 42 has a blank area 45 around the fixing area 44 to expose the upper surface of the main body side adhesive sheet 42 when the main body 14 is fixed. The blank area 45 is formed to be narrow in width at one end side in the long side direction and at both ends in the short side direction, and is formed to be wide in width at the other end side in the long side direction.

[0056] In addition, main body side adhesive sheet 42 is to make base material 46 and adhesive layer 48 stack and constitute.Base material 46 preferably considers elasticity, followability, breathability etc. to be suitable for appropriate material.As the material of base material 46, for example can enumerate polyethylene, polyester, polyurethane, nylon, polyolefin, cotton cloth, weaving cloth, nonwoven fabric etc.In addition, base material 46 also can be constituted to, has functions such as water repellency, hydrophilicity, concavo-convex, vent, moisture permeability, flexibility by arbitrarily processing.

[0057] The adhesive layer 48 is formed on the entire lower surface (one surface) of the main body side adhesive sheet 42 that is opposite to the body surface. For the material of the adhesive layer 48, for example, acrylic adhesives, silicone adhesives, urethane adhesives, synthetic rubber adhesives, etc. can be applied. In addition, the lower surface of the main body side adhesive sheet 42 can not only be provided with the adhesive layer 48 on the entire surface, but also have a non-adhesive area on a part of the lower surface (for example, the protruding portion 42a) where the adhesive layer 48 is not applied.

[0058] The intermediate member 50 is a flat member adhered to the bottom surface 22 of the main body 14 and to the main body side adhesive sheet 42. Therefore, the retention structure 40 has a lower adhesive body 60 (first adhesive portion) that adheres the main body side adhesive sheet 42 to the intermediate member 50, and an upper adhesive body 70 (second adhesive portion) that adheres the housing 20 of the main body 14 to the intermediate member 50. The lower adhesive body 60 is provided on the lower surface (one surface) of the intermediate member 50. The upper adhesive body 70 is provided on the upper surface (the other surface) of the intermediate member 50.

[0059] The intermediate member 50 is formed to be much thinner than the thickness of the outer shell 20, and can be elastically deformed (bent) so as to turn the plate surface. The thickness of the intermediate member 50 is not particularly limited, but can be set in a range of about 0.1 mm to 3 mm, for example. In addition, for example, the elastic modulus of the intermediate member 50 is preferably set to be greater than (or equal to, or slightly smaller than) the elastic modulus of the body surface.

[0060] The intermediate member 50 has a substantially rectangular shape corresponding to the shape of the housing 20 (bottom portion 22) when viewed from above. The planar shape of the intermediate member 50 is formed in a manner that is consistent with (or slightly similar to) the bottom portion 22 of the main body 14. The intermediate member 50 is composed of: a base 52 constituting approximately half of one end side of the intermediate member 50 in the long-side direction; and a plurality of elastic pieces 54 constituting approximately half of the other end side of the intermediate member 50 in the long-side direction. In addition, in the long-side direction of the intermediate member 50, the ratio of the length of each of the base 52 and the plurality of elastic pieces 54 to the total length of the intermediate member 50 is not particularly limited. In the long-side direction of the intermediate member 50, for example, the length of the base 52 is set to a range of 20% to 80% of the length of the intermediate member 50, and the length of the plurality of elastic pieces 54 can be set in accordance with the ratio of the length of the base 52 to the length of the intermediate member 50.

[0061] The base 52 is attached to approximately half of one end side of the housing 20 (bottom portion 22) in the long direction, and is also attached to approximately half of one end side of the main body side attachment sheet 42 in the long direction. Figure 2 As shown, the lower surface of the base 52 is adhered to the lower adhesive body 60, and the upper surface of the base 52 is adhered to the upper adhesive body 70. A pair of corners at one end side in the long side direction of the base 52 are formed into rounded corners that are consistent with the shape of the bottom surface 22. The base 52 is arranged near the main body side connector 26 (one end side of the main body 14), thereby strengthening the adhesion of the drug outflow portion of the main body 14 by the main body side adhesive sheet 42.

[0062] The plurality of elastic pieces 54 include a central piece 56 provided at the center of the intermediate member 50 in the short-side direction, and a pair of arm pieces 58 provided at both sides of the central piece 56 in the short-side direction. The central piece 56 and the pair of arm pieces 58 are respectively continuous with one surface relative to the base 52. A gap C is provided between the central piece 56 and the pair of arm pieces 58 to separate them from each other.

[0063] The center piece 56 is formed into a rectangular shape extending from the other end of the base 52 toward the other end of the intermediate member 50 in the longitudinal direction by a predetermined length. For example, the width of the center piece 56 in the transverse direction is set to be larger than the width of the pair of arm pieces 58 by about 2 to 10 times.

[0064] In the retention structure 40, the central piece 56 constitutes a first extension portion that is attached to the main body side adhesive piece 42 but not to the housing 20 (bottom portion 22). Therefore, the lower adhesive body 60 is attached to the lower surface of the central piece 56, but the upper adhesive body 70 is not attached to the upper surface of the central piece 56.

[0065] In addition, the middle component side exposure hole 56a is formed on the plate surface of the central piece 56. The middle component 50 is attached to the main body side attachment piece 42 in such a manner that the attachment component side exposure hole 42b is received inside the middle component side exposure hole 56a.

[0066] The pair of arm pieces 58 are formed into a long plate shape extending from the other end side of the base 52 toward the other end side of the intermediate member 50 in the long side direction by the same length as the central piece 56. In addition, the extension length of the pair of arm pieces 58 may be different from the extension length of the central piece 56. The outer sides in the width direction of the pair of arm pieces 58 are respectively continuous in a straight line with respect to one side in the short side direction and the other side in the short side direction of the base 52.

[0067] A pair of gaps C provided between the central piece 56 and the pair of arm pieces 58 are set to a width smaller than the width of the pair of arm pieces 58, for example, and extend along the long side direction of the intermediate member 50. An arc-shaped edge Ce connected to the base 52 is formed at one end of the gap C (the root portion where the central piece 56 and the pair of arm pieces 58 are connected to the base 52).

[0068] The pair of arm pieces 58 constitute the second extension portion of the retention structure 40 which is not attached to the main body side adhesive piece 42 but is attached to the housing 20 (bottom portion 22). Therefore, the lower adhesive body 60 is not attached to the lower surface of the arm piece 58, but the upper adhesive body 70 is attached to the upper surface of the arm piece 58.

[0069] Examples of the constituent material of the intermediate member 50 include polymer materials such as polyethylene, polypropylene, polyethylene terephthalate, polyvinyl chloride, polystyrene, ABS resin, acryl, polyamide, polyester, and fluororesin, and mixtures thereof.

[0070] The lower adhesive body 60 is a double-sided tape having an adhesive layer on its lower surface and upper surface. The upper adhesive body 70 is a double-sided tape having an adhesive layer on its lower surface and upper surface. The lower adhesive body 60 and the upper adhesive body 70 are formed into a sheet thinner than the thickness of the intermediate component 50 and have flexibility. In addition, the lower adhesive body 60 and the upper adhesive body 70 can also be formed by directly applying an adhesive (for example, a material applied to the adhesive layer 48 of the main body side adhesive sheet 42) to the lower surface and upper surface of the intermediate component 50.

[0071] The lower adhesive body 60 has a lower base pasting area 62 pasted to the entire lower surface of the base 52, and a lower elastic sheet pasting area 64 pasted to the entire lower surface of the central sheet 56. The lower base pasting area 62 and the lower elastic sheet pasting area 64 are continuous with each other with the same thickness. The lower elastic sheet pasting area 64 has an adhesive body side exposure hole 64a at a position corresponding to the intermediate component side exposure hole 56a. In addition, the lower base pasting area 62 can also be locally set on the lower surface of the base 52 as long as the main body side pasting sheet 42 and the base 52 are firmly bonded. Similarly, the lower elastic sheet pasting area 64 can also be locally set on the lower surface of the central sheet 56.

[0072] The upper adhesive body 70 has an upper base pasting region 72 pasted to the base 52, and a pair of upper elastic sheet pasting regions 74 pasted to the pair of arm pieces 58, respectively. The upper base pasting region 72 and the pair of upper elastic sheet pasting regions 74 are continuous with each other at the same thickness. In addition, the upper base pasting region 72 can be partially provided on the upper surface of the base 52 as long as the main body 14 and the base 52 are firmly adhered. Similarly, the pair of upper elastic sheet pasting regions 74 can also be partially provided on the upper surface of the pair of arm pieces 58.

[0073] Next refer to Figure 3 The state after the main body side adhesive sheet 42, the intermediate component 50, the lower adhesive body 60, and the upper adhesive body 70 are pasted together will be described. The intermediate component 50 is pasted to the main body side adhesive sheet 42 through the lower adhesive body 60. However, as described above, the intermediate component 50 has the base 52 and the center piece 56 pasted to the main body side adhesive sheet 42, but has not the pair of arm pieces 58 pasted to the main body side adhesive sheet 42. The intermediate component 50 (base 52 and center piece 56) which is harder than the main body side adhesive sheet 42 maintains a large range of the plane of the main body side adhesive sheet 42, and can suppress wrinkles and loosening of the main body side adhesive sheet 42.

[0074] In addition, the intermediate member 50 has the base 52 and the pair of arm pieces 58 attached to the housing 20, but the center piece 56 is not attached to the housing 20. In this case, the intermediate member 50 can stabilize the attached state of the housing 20 and the intermediate member 50 by attaching the pair of arm pieces 58 to each of the two sides near the short side direction of the housing 20, thereby suppressing the displacement of the housing 20.

[0075] The pharmaceutical injection device 12 (indwelling device 10 ) of the present embodiment is basically configured as described above, and its operation will be described below.

[0076] The pharmaceutical injection device 12 is provided to the user in a state where the injection portion 18 and the insertion device 32 are assembled, but the tube 16 connected to the injection portion 18 and the main body 14 are separated. And, for example, when the pharmaceutical injection device 12 is placed, the user sequentially performs a placement step of placing the injection portion 18, a connection step of connecting the tube 16 connected to the injection portion 18 and the main body 14, and a main body placement step of placing the main body 14.

[0077] Through the above-mentioned retention operation, the main body 14 of the drug delivery device 12 is adhered to the body surface via the retention structure 40. When retained, the main body 14 is started based on the opening operation of the operating part 23. At this time, the operating part 23 is exposed through the exposing hole 42b on the side of the adhesive component and the exposing hole 56a on the side of the middle component, so that the user can easily operate the operating part 23. In addition, even if it is assumed that the operation of the operating part 23 is forgotten and the main body side adhesive sheet 42 is attached to the body surface, the operating part 23 can be exposed by bending the central sheet 56 in a manner that does not cause the main body side adhesive sheet 42 to be peeled off from the body surface.

[0078] After indwelling, the pharmaceutical injection device 12 automatically injects the pharmaceutical into the patient under the control of the control unit. The indwelling period of the pharmaceutical injection device 12 (the period of pharmaceutical injection) is set within a range of about 1 week to 4 weeks, for example.

[0079] For example Figure 4A as well as Figure 4BAs shown, in the retention state of the main body 14, a main body side adhesive sheet 42 is pasted on the curved part of the patient's abdomen (body surface). At this time, the base 52 of the intermediate component 50 adhered to both the main body 14 and the main body side adhesive sheet 42 is opposite to the body surface in a narrow range that is approximately half of the total length in the long side direction of the intermediate component 50. At one end side of the main body side adhesive sheet 42, the entirety including the fixed area 44 of the base 52 and the blank area 45 on one end side is in close contact with the body surface. In particular, the drug delivery device 12 can stably fix the housing 20 by being retained in a substantially flat part of the abdomen so that one end side of the main body 14 is toward the center (navel) side of the abdomen. One end side of the main body 14 is firmly bonded to the main body side adhesive sheet 42 via the base 52 of the intermediate component 50. Therefore, for example, the intermediate component 50 can transfer the load applied from the tube 16 to the main body side adhesive sheet 42 from one end side to the other end side.

[0080] In addition, in the retention state, the central piece 56 at the other end side of the intermediate component 50 can be separated from the main body 14, following the curvature of the body surface (main body side adhesive sheet 42), and arranged close to the body surface. On the contrary, the pair of arm pieces 58 of the intermediate component 50 do not follow the body surface and maintain the adhesion state with the bottom surface 22 of the shell 20, and can be separated (floated) from the main body side adhesive sheet 42.

[0081] That is, the retention structure 40 fixes both the outer shell 20 and the body surface in the base 52, but the central piece 56 only follows the body surface (the main body side adhesive piece 42), and the pair of arm pieces 58 only follows the outer shell 20. Thus, the other end side of the intermediate component 50 (the side of the plurality of elastic pieces 54) is retained in a manner that can approach and leave the body surface.

[0082] The retention structure 40 retained in this way can prevent the body 14 from peeling off from the body surface (body side adhesive sheet 42) due to external force applied to the body 14 in daily life or accidental contact, etc., by elastic deformation of the intermediate member 50. Figure 4C 2, which illustrates a case where an external force is applied such that the other end side of the housing 20 is separated from the body surface. In this case, the portion of the intermediate component 50 that is bonded to the main body 14 within the range from the base 52 to each arm piece 58 is prevented from being peeled off from the main body 14. The portion of the intermediate component 50 that is bonded to the main body side adhesive sheet 42 within the range from the base 52 to the center piece 56 is prevented from being peeled off from the main body side adhesive sheet 42.

[0083] Therefore, even if the outer shell 20 is separated from the body surface due to external force, the intermediate component 50 is bonded to the main body 14 and the main body side adhesive sheet 42, and is appropriately elastically deformed. During the elastic deformation, the connection is continuously achieved in the base 52, and the central piece 56 and the pair of arm pieces 58 are separated from each other to transfer the external force. In addition, when the elastic piece 54 is elastically deformed, the arc-shaped edge Ce of the base 52 that connects the central piece 56 and the pair of arm pieces 58 can suppress the damage of the intermediate component 50 even if an external force such as tearing the central piece 56 and the pair of arm pieces 58 is applied.

[0084] As described above, the drug delivery device 12 can significantly reduce the risk of the main body side adhesive sheet 42 being peeled off from the body surface even when the main body 14 is left for a long time. In particular, although the rectangular main body 14 is easily peeled off along the long side direction when left in place, the elastic sheet 54 is provided at the other end in the long side direction, thereby narrowing the range where the main body 14 and the main body side adhesive sheet 42 are pasted together, and the peeling of the main body 14 can be suppressed.

[0085] An evaluation test was conducted to observe the sticking state of the drug delivery device 12 having the above-mentioned indwelling structure 40 after the device was stuck to the abdomen of the test subject for 30 hours. According to the results of the evaluation test, it was confirmed that in the indwelling structure 40, 5% of the entire area of ​​the main body side sticking sheet 42 was peeled off, but the main body 14 itself was not peeled off and was able to maintain the indwelling state well.

[0086] In addition, the present invention is not limited to the above-mentioned embodiment, and various changes can be made according to the gist of the invention. Hereinafter, several modified examples of the indwelling device 10 of the present invention are described. In addition, in the following description, for elements having the same structure or the same function as the above-mentioned embodiment, the same figure mark is marked and the detailed description thereof is omitted.

[0087] [First variant]

[0088] Figure 5 The retention structure 40A (intermediate component 50A) of the retention device 10 of the first modified example shown has a central piece 56A bonded to the main body 14, and also has a pair of arm pieces 58A bonded to the main body side adhesive piece 42, which is different from the above-mentioned retention structure 40. In this case, the lower adhesive body 60A has a lower base adhesive area 62, and a lower elastic piece adhesive area 66 connected to the lower base adhesive area 62 and opposite to the pair of arm pieces 58A. On the contrary, the upper adhesive body 70A has an upper base adhesive area 72, and an elastic piece adhesive area 76 connected to the upper base adhesive area 72 and opposite to the central piece 56A. In this case, the elastic piece adhesive area 76 has an adhesive body exposure hole 76a.

[0089] Even with such a configuration, in the indwelling state of the main body 14, the pair of arm pieces 58A follow the body surface, while the central piece 56A follows the main body 14. The central piece 56A and the pair of arm pieces 58A are relatively elastically deformed, thereby resisting external forces.

[0090] [Second variant]

[0091] Figure 6 In the retention structure 40B (intermediate member 50B) of the retention device 10 of the second modified example shown, the central piece 56B is extended short, and on the other hand, the extended ends (other ends) of the pair of arm pieces 58B are connected to each other by a bridge portion 80, which is different from the above-mentioned retention structures 40 and 40A. In addition, the lower side adhesive body 60B is formed in the same shape as the above-mentioned retention structure 40, and the upper side adhesive body 70B has a bridge portion attachment area 78 connected to the pair of upper side elastic piece attachment areas 74 and opposite to the bridge portion 80.

[0092] Thus, the retention structure 40B can more firmly adhere the pair of arm pieces 58B and the bridge portion 80 to the main body 14 (housing 20). Therefore, the same effect as the above-mentioned retention structure 40 can be obtained, and the possibility of the intermediate component 50B being peeled off from the main body 14 due to external force can be further reduced. In other words, the retention device 10 is not particularly limited to the shape of the portion (elastic piece 54) extending from the base 52, and various shapes can be adopted in consideration of the pasting range of the main body 14 or the main body side pasting piece 42.

[0093] [Third Modification]

[0094] Figure 7 In the retention structure 40C (intermediate component 50C) of the retention device 10 of the third modified example shown, the intermediate component 50B of the same shape is applied, the central piece 56C is bonded to the main body 14, and on the other hand, a pair of arm pieces 58C and a bridge portion 80 are bonded to the main body side adhesive sheet 42 via a lower adhesive body 60C, which is different from the above-mentioned retention structures 40, 40A, and 40B. In this case, the central piece 56C is bonded to the main body 14 via an upper adhesive body 70C, and a pair of arm pieces 58C and a bridge portion 80 are bonded to the main body side adhesive sheet 42 via a lower adhesive body 60C having a bridge portion bonding area 68 continuous with a pair of lower elastic sheet bonding areas 66. Even in this configuration, the same effect as the above-mentioned retention structure 40 can be obtained, and the possibility of the intermediate component 50C being peeled off from the main body side adhesive sheet 42 due to external force can be further reduced.

[0095] [Fourth Modification]

[0096] Fig. 8AThe indwelling structure 40D (intermediate member 50D) of the indwelling device 10 of the fourth modified example shown has two elastic pieces 54 extending in parallel to each other and in the same direction from the base 52. One elastic piece 54A constitutes a first extension portion bonded to the main body side adhesive sheet 42, and the other elastic piece 54B constitutes a second extension portion bonded to the main body 14. Even if the indwelling device 10 is configured with the indwelling structure 40D in this way, the same effect as the indwelling structure 40 described above can be obtained.

[0097] [Fifth Modification]

[0098] Figure 8B The indwelling structure 40E (intermediate component 50E) of the indwelling device 10 of the fifth modified example shown has four elastic pieces 54 extending in parallel to each other and in the same direction from the base 52. In this case, the plurality of elastic pieces 54 can be arranged alternately with the first extension portion (elastic piece 54A) bonded to the main body side adhesive sheet 42 and the second extension portion (elastic piece 54B) bonded to the main body 14. In short, the number of elastic pieces 54 provided in the intermediate components 50, 50A to 50E can be arbitrarily designed.

[0099] [Sixth Modification]

[0100] Figure 8C The retention structure 40F (intermediate component 50F) of the retention device 10 of the sixth modified example shown has a base 52 in the central part of the long side direction. In addition, the retention structure 40F has a plurality of elastic pieces 54 extending from the base 52 to one end direction, and a plurality of elastic pieces 54 extending from the base 52 to the other end direction. The plurality of elastic pieces 54 on one end side and the other end side respectively have a first extension portion (elastic piece 54A) bonded to the main body side adhesive sheet 42, and a second extension portion (elastic piece 54B) bonded to the main body 14. Even with such a structure, the retention device 10 can be well retained on a curved body surface. In addition, the plurality of elastic pieces 54 are not limited to the structure extending along the long side direction of the intermediate components 50, 50A~50F, and can also extend along the short side direction.

[0101] [Seventh variant]

[0102] Fig.8D The retention structure 40G (intermediate component 50G) of the retention device 10 of the seventh modified example shown has a base 52 and a plurality of elastic sheets 54, but the base 52 has a first extension portion bonded to the main body side adhesive sheet 42 and a second extension portion bonded to the main body 14. In this way, even if the intermediate component 50G does not have a portion where the lower adhesive body 60 and the upper adhesive body 70 overlap in the vertical direction, the adhesion between the main body 14 and the main body side adhesive sheet 42 can be strengthened.

[0103] The technical ideas and effects that can be grasped from the above-mentioned embodiments are described below.

[0104] The indwelling device 10 of one embodiment of the present invention comprises: a main body 14; a sheet-like adhesive member (main body side adhesive member 42) for indwelling the main body on the body surface of a living body; and plate-like intermediate members 50, 50A to 50G, which are elastically deformable and stacked between the main body 14 and the adhesive member, wherein the intermediate members 50, 50A to 50G have a base 52, and a first extension portion (central piece 56, arm piece 58A) and a second extension portion (central piece 56A, arm piece 58A) extending side by side from the base 52. ), on the surface of the adhesive component side of the intermediate component 50, 50A~50G, a first adhesive portion (lower adhesive body 60, 60A~60C) bonded to the adhesive component is provided in the range from the base 52 to the first extension portion, and on the surface of the main body 14 side of the intermediate component 50, 50A~50G, a second adhesive portion (upper adhesive body 70, 70A~70C) bonded to the main body 14 is provided in the range from the base 52 to the second extension portion, the first extension portion is not bonded to the main body 14, and the second extension portion is not bonded to the adhesive component.

[0105] According to the above, the indwelling device 10 can stably indwell the main body 14 on the body surface of the living body by having a simple structure of the intermediate parts 50, 50A to 50G between the main body 14 and the adhesive part (main body side adhesive sheet 42). That is, when the indwelling device 10 is indwelled on the body surface, the first extension part (central piece 56, arm piece 58A) adhered to the adhesive part does not follow the main body 14 but follows the body surface, and on the other hand, the second extension part (central piece 56A, arm piece 58) adhered to the main body 14 is free to leave from the body surface. Therefore, even if an external force is applied to the main body 14, the intermediate parts 50, 50A to 50G can elastically deform to absorb the external force while maintaining the adhesion of the first adhesive part (lower adhesive body 60, 60A to 60C) to the adhesive part and the adhesion of the second adhesive part (upper adhesive body 70, 70A to 70C) to the main body 14. Therefore, even when the indwelling device 10 is indwelled on the body surface for a long period of time, it is possible to suppress the sticking state of the sticking member from becoming defective, and the indwelling device 10 can be continuously indwelled.

[0106] In addition, the first adhesive portion (lower adhesive bodies 60, 60A to 60C) is provided on the entire surface of the base 52 on the side of the adhesive component (main body side adhesive sheet 42), and the second adhesive portion (upper adhesive bodies 70, 70A to 70C) is provided on the entire surface of the base 52 on the side of the main body 14. Thus, the intermediate components 50, 50A to 50G can firmly retain the main body 14 in the base 52.

[0107] In addition, the intermediate parts 50, 50A to 50E are formed into a rectangular shape that is consistent with the adhesive target part of the main body 14 when viewed from above, and have a base 52 at one end side in the long side direction, and have a first extension part (central piece 56, arm piece 58A) and a second extension part (central piece 56A, arm piece 58) at the other end side in the long side direction. The main body 14 of the rectangular shape is easy to peel off along the long side direction in the retention state, but the retention device 10 has the first extension part and the second extension part at the other end side in the long side direction as described above, thereby preventing the main body 14 from peeling off in the long side direction.

[0108] In addition, one of the first extension part (central piece 56, arm piece 58A) and the second extension part (central piece 56A, arm piece 58) is a central piece 56, 56A protruding from the central part in the width direction of the base 52, and the other of the first extension part and the second extension part is a pair of arm pieces 58, 58A protruding from both sides in the width direction of the base 52. Thus, the indwelling device 10 can make the adhesion of the intermediate member 50, 50A to 50C with respect to the adhesive member (main body side adhesive piece 42) and the main body 14 more stable.

[0109] In addition, the pair of arm pieces 58, 58A has a bridge portion 80 that bridges the protruding ends of each other. Thus, the intermediate components 50B, 50C can adhere the pair of arm pieces 58, 58A and the bridge portion 80 to the adhesive component (body-side adhesive sheet 42) or the body 14 more firmly.

[0110] In addition, a gap C is provided between the first extension part (central piece 56, arm piece 58A) and the second extension part (central piece 56A, arm piece 58) adjacent to each other, and the gap C has an arc-shaped edge Ce at the portion where the first extension part and the second extension part are connected to the base part 52. Thus, even if an external force such as to tear the first extension part and the second extension part is applied to the intermediate member 50, 50A to 50G, damage to the edge Ce can be suppressed and the retention state can be well maintained.

[0111] In addition, the main body 14 has an operating portion 23 for operating the main body 14 on the surface opposite to the intermediate parts 50, 50A to 50C, and the intermediate parts 50, 50A to 50C have an exposed portion (intermediate part side exposure hole 56a) for exposing the operating portion 23 at the position opposite to the operating portion 23, and the exposed portion is provided on either the first extension part (central sheet 56) or the second extension part (central sheet 56A). Thus, even if the indwelling device 10 is a structure having the intermediate parts 50, 50A to 50C, the operating portion 23 can be reliably operated. In particular, even if the user forgets to operate the operating portion 23 and leaves the main body 14 on the body surface, as long as the operating portion 23 is at the position of the first extension part and the second extension part, the operating portion 23 can be exposed and operated in a manner that does not cause the adhesive part (main body side adhesive sheet 42) to be peeled off from the body surface.

[0112] In addition, the indwelling device 10 is a drug administration device 12 for administering drugs to a living body, and the base 52 is arranged near a drug outflow portion of the main body 14. Thus, the drug administration device 12 can firmly hold the drug outflow portion of the main body 14 in the base 52 of the intermediate members 50, 50A to 50E, 50G.

Claims

1. An indwelling device, It is characterized in that have: main body; a sheet-shaped adhesive member for allowing the main body to remain on the body surface of a living body; and a plate-shaped intermediate member which is elastically deformable and is stacked between the main body and the adhesive member, The intermediate member includes a base portion, and a first extension portion and a second extension portion extending side by side from the base portion. A first adhesive portion to be bonded to the bonding member is provided on a surface of the intermediate member on the bonding member side ranging from the base portion to the first extension portion. A second adhesive portion bonded to the main body is provided on the surface of the intermediate member on the main body side in a range from the base portion to the second extension portion. The first extension portion is not bonded to the main body, The second extension portion is not bonded to the adhesive member. One of the first extension portion and the second extension portion is a central piece protruding from a central portion in a width direction of the base portion. The other of the first extension portion and the second extension portion is a pair of arm pieces protruding from both sides in the width direction of the base portion.

2. The indwelling device according to claim 1, It is characterized in that The first adhesive portion is provided on the entire surface of the base portion on the side of the attachment member. The second adhesive portion is provided on the entire surface of the base portion on the main body side.

3. The indwelling device according to claim 1 or 2, It is characterized in that The intermediate member is formed into a rectangular shape in accordance with the bonding target portion of the main body in a plan view, and The base portion is provided at one end side in the longitudinal direction, and the first extension portion and the second extension portion are provided at the other end side in the longitudinal direction.

4. The indwelling device according to claim 1, It is characterized in that The pair of arm pieces have a bridge portion that bridges the protruding ends of each other.

5. The indwelling device according to claim 1 or 2, It is characterized in that A gap is provided between the first extension portion and the second extension portion adjacent to each other, The gap has an arc-shaped edge portion at a portion where the first extension portion and the second extension portion are connected to the base portion.

6. The indwelling device according to claim 1 or 2, It is characterized in that The main body has an operating portion for operating the main body on a surface opposite to the intermediate member. The intermediate member has an exposed portion for exposing the operating portion at a position facing the operating portion. The exposed portion is provided on either the first extending portion or the second extending portion.

7. The indwelling device according to claim 1 or 2, It is characterized in that The indwelling device is a drug delivery device for delivering a drug to the living body. The base is disposed in the vicinity of a portion of the body from which the medicine flows out.

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