Syringe for adhesive

Abstract

One embodiment of the present invention provides an adhesive syringe comprising: a main body having an internal space arranged therein for accommodating contents and an opening for the contents to flow into or be discharged from the internal space; and a linear moving part having one end inserted into the internal space of the main body and reciprocating in the longitudinal direction of the main body, wherein the linear moving part comprises a head part disposed at one end, a gripping part connected to the head part and having one end disposed outside the internal space of the main body, and a protrusion disposed at the insertion end of the head part and protruding radially outward from the head part.

Description

Technology Field

[0001] The present invention relates to a syringe, and more specifically, to a syringe capable of accommodating and storing a medical adhesive for a long period. Background Technology

[0002] Conventional medical adhesives are developed in the form of typical adhesive storage containers, such as vials and ampoules. When these medical adhesives are to be used with medical devices such as catheters, a procedure is required to transfer the adhesive from the container into a separate syringe.

[0003] In this case, the medical adhesive may be exposed to moisture in the air, which can negatively affect its stability and performance. In addition, as numerous bubbles are introduced during the transport of the medical adhesive, a separate bubble removal process is required before use, which can be a difficult process, especially for high-viscosity medical adhesives.

[0004] Furthermore, the combination of materials used in general medical syringes, such as polypropylene (PP) and rubber, does not provide sufficient stability for long-term storage of medical adhesives due to the inherent characteristics of the materials.

[0005] Accordingly, there is a need for the development of a syringe that can accommodate medical adhesive and allow for long-term storage without the need for separate pretreatment processes, such as transferring the medical adhesive and removing bubbles. Prior art literature

[65535] U.S. Patent Application Publication No. US2023 / 0087154 (March 23, 2023) Japanese Patent Publication No. JP2022-530581 (June 30, 2022) The problem to be solved

[0006] The technical problem that the present invention aims to solve is to provide a syringe capable of accommodating and storing medical adhesive for a long period.

[0007] The technical problems that the present invention aims to solve are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art to which the present invention belongs from the description below. means of solving the problem

[0008] To achieve the above technical objective, an adhesive syringe according to one embodiment of the present invention comprises a main body having an internal space for receiving contents and an opening for the contents to flow into or be discharged from the internal space, and a linear moving part having one end inserted into the internal space of the main body and reciprocating in the longitudinal direction of the main body, wherein the linear moving part may comprise a head part disposed at the one end, a gripping part connected to the head part and having one end disposed outside the internal space of the main body, and a protrusion disposed at the insertion end of the head part and protruding radially outward from the head part.

[0009] In one embodiment of the present invention, the diameter of the protrusion increases from the insertion end to the gripping part, and the maximum diameter of the protrusion may be larger than the diameter of the internal space of the main body by a predetermined length.

[0010] In one embodiment of the present invention, the outer surface of the head portion may be spaced apart from the inner surface of the internal space of the main body.

[0011] In one embodiment of the present invention, the head portion may have a concave sealing groove extending from the outer surface of the head portion toward the radially inner side of the head portion.

[0012] In one embodiment of the present invention, the sealing grooves are provided in a plurality, and the plurality of sealing grooves may be spaced apart from each other.

[0013] In one embodiment of the present invention, the sealing groove may be positioned adjacent to the maximum diameter portion of the protrusion.

[0014] In one embodiment of the present invention, the head portion may further comprise a sealing member that is inserted into the sealing groove and contacts the inner surface of the internal space of the main body.

[0015] In one embodiment of the present invention, the outer diameter of the sealing member may be larger than the diameter of the head portion and smaller than the maximum diameter of the protrusion portion.

[0016] In one embodiment of the present invention, the diameter of the internal space of the main body may decrease as it approaches the opening along the longitudinal direction of the main body.

[0017] In one embodiment of the present invention, the main body, the head portion, and the protrusion portion may be made of different materials.

[0018] In one embodiment of the present invention, the main body may be made of COC (cyclo olefin copolymer), and the head portion and the protrusion portion may be made of PTFE (polytetrafluoroethylene).

[0019] In one embodiment of the present invention, an opening and closing part detachably coupled to an opening of the main body may be further included. Effects of the invention

[0020] An adhesive syringe according to an embodiment of the present invention has a structure in which a protrusion, rather than a sealing member, contacts the contents to provide primary sealing, and the sealing member provides double sealing, thereby more reliably preventing air or moisture from entering the contents. Additionally, it prevents the sealing member from deforming due to prolonged contact with the contents. Furthermore, by bending the maximum diameter portion of the protrusion in contact with the main body to correspond to the diameter of the internal space, it prevents the main body from being damaged by excessive expansion. Moreover, by making the protrusion and the main body that directly contact the contents of a chemical-resistant material, deformation and damage to the adhesive syringe can be prevented when the contents are stored for a long period.

[0021] The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the composition of the invention described in the description or claims of the present invention. Brief explanation of the drawing

[0022] FIG. 1 is a front view illustrating a syringe for adhesive according to one embodiment of the present invention. FIG. 2 is a cross-sectional view of a main body according to one embodiment of the present invention. FIG. 3 is a cross-sectional view illustrating a linear moving part according to one embodiment of the present invention. FIG. 4 is a perspective view illustrating a linear moving part according to one embodiment of the present invention. FIG. 5 is a cross-sectional view illustrating the state before a linear moving part according to one embodiment of the present invention is inserted into the internal space of the main body. FIG. 6 is a cross-sectional view illustrating a state in which a linear moving part according to one embodiment of the present invention is inserted up to the center of the internal space of the main body. FIG. 7 is a cross-sectional view illustrating a state in which a linear moving part according to one embodiment of the present invention is inserted into the internal space of a main body adjacent to an opening. Specific details for implementing the invention

[0023] The present invention will be described below with reference to the attached drawings. However, the present invention may be implemented in various different forms and is therefore not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification have been given similar reference numerals.

[0024] Throughout the specification, when it is stated that a part is "connected (connected, in contact, combined)" with another part, this includes not only cases where they are "directly connected," but also cases where they are "indirectly connected" with other members interposed between them. Furthermore, when it is stated that a part "includes" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but rather allows for the inclusion of additional components.

[0025] The terms used herein are merely for describing specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as “comprising” or “having” are intended to indicate the presence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0026] Embodiments of the present invention will be described in detail below with reference to the attached drawings.

[0027] FIG. 1 is a front view illustrating an adhesive syringe according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a main body according to an embodiment of the present invention. FIG. 3 is a cross-sectional view illustrating a linear moving part according to an embodiment of the present invention. FIG. 4 is a perspective view illustrating a linear moving part according to an embodiment of the present invention.

[0028] Referring to FIGS. 1 to 4, an adhesive syringe (1) according to an embodiment of the present invention can be used for storing contents inside and for discharging an accurate amount of contents to a target object. Here, the contents contained inside may be an adhesive. Specifically, the contents may be a medical adhesive. And, the target object may be a patient's affected area.

[0029] The adhesive syringe (1) may include a main body (100) and a linear moving part (300). Additionally, the adhesive syringe (1) may further include an opening / closing part (200).

[0030] The main body (100) can accommodate contents inside. Specifically, as illustrated exemplarily in FIG. 2, the main body (100) can accommodate contents inside and may have an internal space (S) into which a linear moving part (300) to be described later is inserted.

[0031] The main body (100) may have various shapes, such as a cylinder or a polygonal prism. However, for the convenience of explanation, the following description will focus on an embodiment in which the main body (100) is in the shape of a cylinder with an internal space.

[0032] The main body (100) may be made of a chemical-resistant material. As described above, when the contents contained in the adhesive syringe (1) are medical adhesives, the main component may be N-butyl cyanoacrylate (NBCA). In this case, polypropylene (PP), which is used as a material for general medical syringes, may undergo deformation in shape during the high-temperature sterilization process and during long-term contact with the medical adhesive. Accordingly, the main body (100) may be made of a material that is capable of high-temperature sterilization and does not undergo deformation even when in long-term contact with the adhesive. As an example, the main body (100) may be made of COC (cycloolefin copymer).

[0033] The main body (100) may have a first opening (110), a second opening (120), a flange (130), and an internal space (S).

[0034] The first opening (110) may be a passage through which contents move. The first opening (110) may connect the internal space (S) with the outside of the main body (100). Through this first opening (110), contents may flow into the internal space (S) from the outside of the main body (100), or contents contained in the internal space (S) may be discharged to the outside of the main body (100).

[0035] The first opening (110) may be placed in the main body (100). In one embodiment, the first opening (110) may be placed at one end of the main body (100). At this time, the end of the main body (100) where the first opening (110) is placed may be the upper end located above the y-axis direction [i.e., the length direction of the main body (100)] in the drawing among the two ends of the main body (100).

[0036] The first opening (110) may have a cross-sectional area smaller than that of the main body (100). Specifically, the diameter of the first opening (110) may be smaller than the diameter of the main body (100). Here, the diameter of the main body (100) may be the diameter of the outer surface of the main body (100).

[0037] The second opening (120) may be a passage into which the linear moving part (300), which will be described later, is inserted into the internal space (S). The second opening (120) may be positioned at the other end of the main body (100). At this time, the other end of the main body (100) where the second opening (120) is positioned may be the lower end located below the y-axis direction of the drawing [i.e., the length direction of the main body (100)] among the two ends of the main body (100). In this case, the second opening (120) may be positioned to face the first opening (110). Accordingly, the main body (100) may be formed in a shape that penetrates from the upper end where the first opening (110) is provided, through the internal space (S), to the lower end where the second opening (120) is provided.

[0038] The second opening (120) can communicate the main body (100) with the outside. Through this second opening (120), at least a portion of the linear moving part (300) can be inserted from the outside of the main body (100) into the internal space (S), or the linear moving part (300) inserted into the internal space (S) can be discharged to the outside of the main body (100). At this time, the second opening (120) may have a diameter of the same or similar size as the internal space (S) of the main body (100). Accordingly, the linear moving part (300) can be easily inserted into the internal space (S) of the main body (100) through the second opening (120).

[0039] The flange (130) may be a part of the main body (100) that the user holds when discharging contents using an adhesive syringe (1). At this time, the flange (130) may be positioned on the main body (100). In one embodiment, the flange (130) may be positioned at the bottom of the main body (100) adjacent to the second opening (120).

[0040] The flange (130) may be formed to protrude outward along the radial direction of the main body from the outer surface of the main body (100). Additionally, the flange (130) may extend along the outer circumference of the second opening (120). Accordingly, the flange (130) may be in the shape of a ring surrounding the lower part of the main body (100).

[0041] The internal space (S) may be a space in which contents are accommodated in the main body (100). In this case, the internal space (S) may be a space formed by being surrounded by the inner surface of the main body (100). The internal space (S) may be a space of various shapes, such as a cylinder or a polygon, but below, the description will focus on an embodiment in which the internal space (S) is a cylindrical space surrounded by the inner surface of the main body.

[0042] The diameter of the internal space (S) may not be constant due to tolerances that may occur during the manufacturing process of the main body (100). Specifically, the diameter of the internal space (S) may be formed to vary along the longitudinal direction (y-axis direction) of the main body (100). Here, the diameter of the internal space (S) may be the diameter of the inner surface of the main body (100).

[0043] In one embodiment, when the main body (100) is manufactured by an injection molding process, a fine slope may be formed on the inner surface of the main body (100) to facilitate separation of the molded main body (100) from the mold. In this case, the internal space (S) may be formed such that the diameter decreases as it goes from the second opening (120) to the first opening (110). Specifically, the central diameter (D1b) may be smaller than the lower diameter (D1a) of the main body (100), and the upper diameter (D1c) may be smaller than the central diameter (D1b). For example, the diameter of the internal space (S) may gradually decrease at the same rate as it goes from the lower part of the main body (100) to the upper part of the main body (100) along the longitudinal direction (y-axis direction) of the main body (100).

[0044] The linear moving part (300) can apply pressure to the contents contained in the internal space (S) of the main body (100). Specifically, the linear moving part (300) is inserted into the internal space (S) of the main body (100) through the second opening (120) and can reciprocate in the longitudinal direction of the main body (100). As the linear moving part (300) reciprocates, the contents can be introduced into or discharged into the internal space (S) of the main body (100) through the first opening (110).

[0045] The linear moving part (300) may be provided with a head part (310), a sealing member (320), a protrusion part (330), and a gripping part (340).

[0046] The head portion (310) may be coupled with a sealing member (320) to be described later. The head portion (310) may be positioned at one end of the linear moving portion (300). At this time, the one end of the linear moving portion (300) may be the end that is inserted into the internal space (S) among the ends of the linear moving portion (300).

[0047] The head portion (310) may have a shape corresponding to the internal space (S) of the main body (100). In one embodiment, as described above, if the internal space (S) is a cylindrical space, the head portion (310) may be provided in a cylindrical shape to correspond thereto.

[0048] When the linear movement part (300) is inserted into the internal space (S) of the main body (100), the outer surface of the head part (310) may be spaced apart from the inner surface of the main body (100). Specifically, the diameter (D2a) of the head part (310) may be smaller than the diameter (D1c) of the part adjacent to the first opening (110) among the diameters (D1a, D1b, D1c) of the internal space (S). Accordingly, the head part (310) may be able to reciprocate along the longitudinal direction (y-axis direction) of the main body (100) while inserted into the internal space (S).

[0049] Meanwhile, the difference in diameter between the head portion (310) and the internal space (S) may be minute, and accordingly, there may be a minute gap between the head portion (310) and the internal space (S) such that no frictional force is generated between the outer surface of the head portion (310) and the inner surface of the internal space (S).

[0050] The protrusion (330) may be a part that comes into contact with the contents contained in the main body (100). The protrusion (330) may be positioned at one end of the head part (310). At this time, the one end may be the end (hereinafter, insertion end) on the side where the head part (310) is inserted into the internal space (S) of the main body (100).

[0051] The protrusion (330) may be formed to protrude radially outward from the outer surface of the head portion (310). At this time, the diameter of the protrusion (330) may vary along the longitudinal direction (y-axis direction) of the protrusion (330). Specifically, the diameter of the protrusion (330) may increase as it moves from the insertion end toward the gripping portion. In this case, the protrusion (330) may have a maximum diameter (D2b) at the location where it is connected to the head portion (310). As an example, the protrusion (330) may be in the shape of a cone or a mushroom cap (pileus).

[0052] As described above, at least a portion of the protrusion (330) may protrude further toward the outside of the head portion (310) than the head portion (310). Specifically, the portion where the diameter of the protrusion (330) is maximum (hereinafter, the maximum diameter portion) may protrude further toward the radially outside of the head portion (310) by a predetermined distance than the head portion (310).

[0053] More specifically, the diameter (D2b) of the maximum diameter portion (331) may be larger than the diameter (D2a) of the head portion (310). Also, the diameter (D2b) of the maximum diameter portion (331) may be larger than the diameters (D1a, D1b, D1c) of the internal space (S) of the main body (100) by a preset length. At this time, the preset length may be 0.06 to 0.16, and preferably 0.11. For example, if the diameter (D1a) of the lower part of the internal space (S) of the main body (100) is Φ12.19, the diameter (D2b) of the maximum diameter portion (331) may be in the range of Φ12.25 to 12.35, and preferably Φ12.3.

[0054] The protrusion (330) can seal the contents contained in the internal space (S) of the main body (100). Specifically, when the linear moving part (300) is inserted into the internal space (S), the maximum diameter portion (331) of the protrusion (330) can receive a compressive force from the inner surface of the main body (100). At this time, the compressive force may be a force acting from the inner surface of the main body (100) toward the radial inner side of the main body (100). By applying this compressive force, the maximum diameter portion (331) of the protrusion (330) and the inner surface of the main body (100) can come into strong contact. Accordingly, the contents contained in the upper part of the protrusion (330) can be sealed.

[0055] At least a portion of the shape of the protrusion (330) may be deformed during the process of sealing the contents. Specifically, the maximum diameter portion (331) of the protrusion (330) may be finely deformed in shape to correspond to the diameter of the internal space (S) of the main body (100) due to the aforementioned compressive force. More specifically, the maximum diameter portion (331) of the protrusion (330) may be bent toward the second opening (120) with respect to the longitudinal direction (y-axis direction) of the main body (100).

[0056] The protrusion (330) may be made of a chemically resistant and deformable material. For example, the protrusion (330) may be made of PTFE (polytetrafluoroethylene). In this case, the protrusion (330) does not undergo deformation such as melting when in long-term contact with a medical adhesive, and the maximum diameter portion (331) can be finely deformed according to the diameter of the internal space (S) of the main body (100). Additionally, since Teflon is a material with a low coefficient of friction, when the linear moving portion (300) moves along the longitudinal direction of the main body (100), the maximum diameter portion (331) can move smoothly along the inner surface of the main body (100).

[0057] The sealing member (320) can double-seal the contents contained within the main body (100). Specifically, the sealing member (320) is positioned in the spaced-apart space between the head portion (310) and the main body (100), thereby more effectively preventing air or moisture from entering the contents. At this time, the sealing member (320) can be positioned in the sealing groove (311) provided in the head portion (310).

[0058] The sealing groove (311) may be formed concavely from the outer surface of the head portion (310) toward the radial inner side of the head portion (310). Specifically, the sealing groove (311) may be formed in a band shape by extending along the circumferential direction of the outer surface of the head portion (310). At this time, the sealing groove (311) may have various cross-sectional shapes, such as polygons or circles. However, for convenience of explanation, the following description will focus on an embodiment in which the sealing groove (311) has a square cross-section, as shown in FIG. 3. In this case, the diameter (D2c) of the portion of the head portion (310) equipped with the sealing groove (311) may be smaller than the diameter (D2a) of the portion not equipped with the sealing groove (311).

[0059] The sealing groove (311) may be positioned at the bottom of the protrusion (330). In this case, the sealing member (320) positioned in the sealing groove (311) may not come into direct contact with the contents. Accordingly, when the contents are stored in the adhesive syringe (1) for a long period, the sealing member (320) may not melt or deform.

[0060] At least one sealing groove (311) may be provided. In one embodiment, a plurality of sealing grooves (311) may be provided. Although the number of sealing grooves (311) is not limited, for convenience of explanation, the description will focus on an embodiment in which two sealing grooves (311) are provided as shown in FIGS. 3 to 7.

[0061] A plurality of sealing grooves (311) may be spaced apart from each other on the head portion (310). Specifically, one sealing groove (311) may be positioned closer to the protrusion (330) to be described later, and another sealing groove (311) may be positioned closer to the gripping portion (340).

[0062] The sealing member (320) may be positioned between the head portion (310) and the main body (100). Specifically, the sealing member (320) may be inserted into the sealing groove (311) of the head portion (310) and may come into contact with the inner surface of the main body (100).

[0063] The sealing member (320) may be formed in a ring shape by extending along the circumferential direction of the head portion (310). At this time, the sealing member (320) may have various cross-sectional shapes, such as a circle or a polygon. However, for convenience of explanation, the following description will focus on an embodiment in which the sealing member (320) has a ring shape with a circular cross-section. As an example, the sealing member (320) may be an O-ring.

[0064] The sealing member (320) may be made of an elastic material. In this case, the shape of the sealing member (320) may be deformed depending on the counterpart to which it is bonded or contacted. For example, the sealing member (320) may be made of chemical-resistant rubber.

[0065] The inner diameter of the sealing member (320) may be smaller than the diameter (D2c) of the sealing groove (311). Accordingly, the sealing member (320) can be inserted into the sealing groove (311) so as to fit, thereby fixing its position.

[0066] When the sealing member (320) is inserted into the sealing groove (311), at least a portion of the sealing member (320) may protrude further radially outward than the outer surface of the head portion (310). Specifically, the outer diameter (D2d) of the sealing member (320) may be larger than the diameter (D2a) of the head portion (310) and the diameter (D2c) of the sealing groove (311), and may also be larger than the diameters (D1a, D1b, D1c) of the internal space (S) of the main body (100). Accordingly, when the linear moving portion (300) is inserted into the internal space (S) of the main body (100), at least a portion of the sealing member (320) may come into contact with the inner surface of the main body (100).

[0067] That is, the sealing member (320) can seal the space between the sealing groove (311) and the main body (100) by simultaneously contacting the inner surface of the sealing groove (311) and the main body (100). Accordingly, the sealing member (320) can prevent external air or moisture from entering the contents contained inside the main body (100).

[0068] The sealing members (320) may be provided in the same number as the sealing grooves (311). When multiple sealing members (320) are provided, air or moisture can be more effectively prevented from entering the contents contained in the main body (100).

[0069] The gripping portion (340) may be the part where the user grips the linear moving portion (300) when discharging the contents using the adhesive syringe (1). The gripping portion (340) may be positioned at the other end of the linear moving portion (300). At this time, the other end of the linear moving portion (300) may be the opposite end of the aforementioned linear moving portion (300) where the head portion (310) is positioned.

[0070] The gripping portion (340) may be formed by extending from the outer surface of the head portion (310) in the longitudinal direction (y-axis direction) of the linear movement portion (300). In the drawing, the gripping portion (340) is depicted as a bar having a cross-shaped cross section, but the present invention is not limited thereto, and the gripping portion (340) may be provided as a bar having a cross section of various shapes, such as a polygon or a circle.

[0071] The gripping portion (340) may be equipped with a pressure portion (341). The pressure portion (341) may be a part where the user applies pressure to the linear movement portion (300) when discharging contents using an adhesive syringe (1).

[0072] The pressure member (341) may be positioned at one end of the gripping member (340). Here, the one end of the gripping member (340) may be the end opposite to the end where the head member (310) is positioned.

[0073] The pressurizing part (341) can be formed by extending from the central axis of the linear moving part (300) in a direction perpendicular to the length direction (y-axis direction) of the linear moving part (300). The pressurizing part (341) can have various shapes, such as a circle or a polygon. For example, the pressurizing part (341) can have a disc shape.

[0074] At least a portion of the linear moving part (300) as described above may be made of a chemical-resistant material. Specifically, the protrusion (330) and the head part (310) that come into direct contact with the contents contained in the main body (100) may be made of a chemical-resistant material. The chemical-resistant material forming the protrusion (330) and the head part (310) may be, for example, PTFE (polytetrafluoroethylene). At this time, the gripping part (340) may also be made of the same material, that is, a chemical-resistant material (e.g., Teflon). However, the present invention is not limited thereto, and the protrusion (330) and the head part (310) may be made of a chemical-resistant material such as Teflon, while the gripping part (340) may be made of a different material.

[0075] Referring again to FIG. 1, the opening / closing part (200) can selectively open or close the first opening (110).

[0076] The opening / closing part (200) may have a shape corresponding to the first opening (110). For example, the opening / closing part (200) may be a hollow cylinder shape with one end open. In this case, the inner diameter of the opening / closing part (200) may be equal to or smaller than the outer diameter of the first opening (110).

[0077] The opening / closing part (200) can be optionally coupled to the first opening (110). Specifically, the first opening (110) can be inserted through one end of the opening / closing part (200). At this time, the outer surface of the first opening (110) can come into contact with the inner surface of the opening / closing part (200). In this case, the first opening (110) can be closed. That is, the internal space (S) of the main body (100) can be separated from the outside. Therefore, it is possible to prevent air or moisture from entering the contents contained in the main body (100).

[0078] The opening / closing part (200) may be replaced with a discharge member (not shown) to discharge contents using an adhesive syringe (1). In this case, after separating the opening / closing part (200) from the first opening (110), the discharge member may be attached to the first opening (110). For example, the discharge member may be a catheter.

[0079] FIG. 5 is a cross-sectional view illustrating the state before a linear moving part according to an embodiment of the present invention is inserted into the internal space (S) of the main body. FIG. 6 is a cross-sectional view illustrating the state in which a linear moving part according to an embodiment of the present invention is inserted up to the center of the internal space (S) of the main body. FIG. 7 is a cross-sectional view illustrating the state in which a linear moving part according to an embodiment of the present invention is inserted up to the internal space (S) of the main body adjacent to the opening.

[0080] Referring to FIGS. 5 to 7, the linear moving part (300) is inserted into the internal space (S) of the main body (100), and the state change of the linear moving part (300) as it moves along the longitudinal direction (y-axis direction) of the main body (100) may be as follows. Meanwhile, as described above, the linear moving part (300) can move back and forth linearly along the longitudinal direction (y-axis direction) of the main body (100) with at least a part inserted into the internal space (S). At this time, the central axis of the linear moving part (300) may be the same as the central axis (C) of the internal space (S) of the main body (100).

[0081] First, one end of the linear moving part (300) can be inserted into the internal space (S) of the main body (100). Specifically, the head part (310) of the linear moving part (300) can be inserted into the internal space (S) of the main body (100) through the second opening (120) from its insertion end. That is, among the linear moving part (300), the protrusion (330) may be the part that is first inserted into the internal space (S) of the main body (100). At this time, as described above, the diameter (D2b) of the maximum diameter part (331) of the protrusion (330) may be larger than the diameters (D1a, D1b, D1c) of the internal space (S) (see FIG. 5).

[0082] Next, the linear moving part (300) can move linearly toward the first opening (110) along the longitudinal direction (y-axis direction) of the main body (100). Specifically, the protrusion (330) of the linear moving part (300) can be inserted to a position adjacent to the central diameter (D1b) of the internal space (S). In this case, as described above, the maximum diameter portion (331) of the protrusion (330) can receive a compressive force from the inner surface of the main body (100). By applying this compressive force, the protrusion (330) can seal the contents contained in the internal space (S) of the main body (100), and the maximum diameter portion (331) of the protrusion (330) can be bent toward the second opening (120).

[0083] Next, the linear moving part (300) can move linearly along the longitudinal direction of the main body (100) to a position adjacent to the first opening (110). Specifically, the protrusion (330) of the linear moving part (300) can move linearly to a position adjacent to the upper diameter (D1c) of the internal space (S). At this time, the internal space (S) into which the linear moving part (300) is inserted can be formed such that the diameter decreases from the bottom to the top for the convenience of the manufacturing process of the main body (100), as described above. In this case, the compressive force of the main body (100) acting on the linear moving part (300) can increase from the bottom to the top of the main body (100). Accordingly, the amount of bending of the maximum diameter portion (331) of the protrusion (330) can also increase from the bottom to the top of the main body (100). That is, the maximum diameter portion (331) can be bent more when inserted to the upper diameter portion (D1c) of the main body (100) than when inserted to the central diameter portion (D1b) of the main body (100). At this time, the amount of bending of the maximum diameter portion (331) may be very small, but for convenience of explanation, it is exaggerated in FIGS. 6 and 7.

[0084] That is, the maximum diameter portion (331) of the protrusion (330) can be bent to correspond to the diameter of the variable internal space (S). Accordingly, when the protrusion (330) contacts the inner surface of the main body (100) to seal the contents, it is possible to prevent the side of the main body (100) from being excessively deformed toward the radial outer side of the main body (100). Therefore, when the contents are stored in the adhesive syringe (1) for a long period, it is possible to prevent the main body (100) from being damaged.

[0085] Referring again to FIGS. 5 to 7, as the linear moving part (300) moves back and forth, contents may be introduced into or discharged into the internal space (S) of the main body (100). Specifically, when the linear moving part (300) moves along the inner surface of the main body (100) in a direction approaching the first opening (110), the protrusion (330) pushes the contents out, thereby allowing the contents to be discharged to the outside through the first opening (110). Conversely, when the linear moving part (300) moves along the inner surface of the main body (100) in a direction approaching the second opening (120), negative pressure is formed in the internal space (S), thereby allowing contents to be introduced into the internal space (S) from the outside through the first opening (110).

[0086] As described above, the adhesive syringe (1) according to the embodiment of the present invention has a structure in which a protrusion (330), rather than a sealing member (320), contacts the contents to seal them primarily, and the sealing member (320) seals them twice, thereby more reliably preventing air or moisture from entering the contents. Additionally, it is possible to prevent the sealing member (320) from deforming due to prolonged contact with the contents. Furthermore, by bending the maximum diameter portion (331) of the protrusion (330) that contacts the main body (100) to correspond to the diameter of the internal space (S), it is possible to prevent the main body (100) from being damaged by excessive expansion. Moreover, by making the protrusion (330) that directly contacts the contents and the main body (100) of a chemical-resistant material, deformation and damage of the adhesive syringe (1) can be prevented when the contents are stored for a long period.

[0087] The foregoing description of the present invention is for illustrative purposes only, and those skilled in the art will understand that modifications can be easily made to other specific forms without altering the technical spirit or essential features of the invention. Therefore, the embodiments described above are illustrative in all respects and are not restrictive.

[0088] It must be understood as such. For example, each component described as a single unit may be implemented in a distributed manner, and likewise, components described as distributed may be implemented in a combined form.

[0089] The scope of the present invention is defined by the claims set forth below, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the present invention. Explanation of the symbols

[0090] 1: Syringe for adhesive 100: Main body 200: Opening / closing part 300: Linear movement part

Claims

Claim 1 A syringe for adhesive, comprising: a main body having an internal space arranged therein for accommodating contents and an opening for the contents to flow into or be discharged from the internal space; and a linear moving part having one end inserted into the internal space of the main body and reciprocating in the longitudinal direction of the main body; wherein the linear moving part comprises: a head part disposed at the one end; a gripping part connected to the head part and having one end disposed outside the internal space of the main body; and a protrusion disposed at the insertion end of the head part and protruding radially outward from the head part; wherein the head part has a sealing groove that is concave from the outer surface of the head part toward the radially inward side of the head part, and the sealing groove is disposed at the lower end of the protrusion and is disposed adjacent to the maximum diameter portion of the protrusion. Claim 2 A syringe for adhesive according to claim 1, wherein the diameter of the protrusion increases from the insertion end to the gripping part, and the maximum diameter of the protrusion is larger than the diameter of the internal space of the main body by a predetermined length. Claim 3 In paragraph 2, the head portion is an adhesive syringe in which the outer surface thereof is spaced apart from the inner surface of the internal space of the main body. Claim 4 delete Claim 5 In paragraph 3, the above-mentioned sealing grooves are provided in plurality, and the plurality of said sealing grooves are spaced apart from each other, for an adhesive syringe. Claim 6 delete Claim 7 In paragraph 3, the head portion further comprises a sealing member that is inserted into the sealing groove and contacts the inner surface of the internal space of the main body, forming an adhesive syringe. Claim 8 In claim 7, the outer diameter of the sealing member is larger than the diameter of the head portion and smaller than the maximum diameter of the protrusion, for an adhesive syringe. Claim 9 A syringe for adhesive according to claim 1, wherein the diameter of the internal space of the main body decreases as it approaches the opening along the longitudinal direction of the main body. Claim 10 A syringe for adhesive according to claim 1, wherein the main body, the head part, and the protrusion part are made of different materials. Claim 11 In claim 10, the above-mentioned main body is made of COC (cyclo olefin copolymer), and the above-mentioned head part and the above-mentioned protrusion are made of PTFE (polytetrafluoroethylene), a syringe for adhesive. Claim 12 A syringe for adhesive according to claim 1, further comprising an opening / closing part detachably coupled to the opening of the main body.

Images