JP2021104838A - Chemical solution supply tool, chemical solution supply device, and manufacturing method of chemical solution supply tool - Google Patents

Abstract

To provide a chemical solution supply tool and a chemical solution supply device that can suppress the occurrence of burrs on a plug part.SOLUTION: The present application discloses a chemical solution supply tool that can be attached to a container storing a chemical solution. A chemical solution supply tool includes: a cylindrical substrate that is configured to be attachable to an opening of the container and forms an opening region at a tip from which the chemical solution flows out; a plug part that opens and closes the opening region by being displaced in an axial direction of the substrate; and a pressing part that energizes the plug part so as to close the opening region. The substrate includes a retaining part having a top that expands toward the axis of the substrate so as to prevent the plug part from coming off the substrate through the opening region. The plug part includes an outer edge part that closes the opening region by contacting on the retaining part, and is formed of a resin that is harder than the substrate.SELECTED DRAWING: Figure 1

Description

The present invention relates to a chemical solution supply tool, a chemical solution supply device, and a method for manufacturing a chemical solution supply tool used for supplying a chemical solution.

Various chemical solution feeders have been developed for contact-type application of chemical solutions to the human body (see Patent Document 1). The chemical solution feeder of Patent Document 1 is configured to be attachable to the opening of a container in which the chemical solution is stored. Specifically, a tubular substrate having a circular opening region from which the drug solution flows out is formed at the tip, and a substantially disk-shaped substrate that opens and closes the opening region by displacing the substrate in the axial direction within the substrate. It includes a plug portion and a pressing portion configured to urge the plug portion so that the plug portion closes the opening area.

The outer shape of the substrate is designed to match the shape of the opening of the container so that the chemical feeder can be attached to the container. The substrate has a retaining portion that bulges toward the axis of the substrate inside the substrate. The retaining portion is provided at the tip end portion of the substrate in order to prevent the plug portion from coming out of the substrate through the opening region. Specifically, the retaining portion is configured to be in contact with the outer edge of the plug portion in the substrate.

The opening area is closed by the contact of the outer edge portion of the plug portion with the retaining portion. The pressing portion urges the plug portion so that this contact state is maintained, and prevents the chemical solution from flowing out when the chemical solution feeder is not used.

When the chemical feeder is used, the user holds the container in a position in which the open area of the substrate faces downward. When the user presses the exposed part of the plug against the human body, an external force opposite to the urging force acts on the plug. When the external force exceeds the urging force of the pressing portion, the plug portion is displaced in the axial direction of the substrate and separated from the retaining portion. The chemical solution in the container flows down into the gap between the stopper and the retaining portion, and flows out from the opening region. The drug solution that has flowed out of the opening region flows into the gap between the human body and the exposed portion of the plug and is supplied to the human body.

International Publication No. WO2017 / 099235

Regarding the assembly of the chemical solution feeder, the outer edge portion of the stopper portion is formed so as to come into contact with the retaining portion that bulges in the axial direction of the substrate when the stopper portion is housed in the substrate. Therefore, when the stopper is housed in the substrate through the opening region of the substrate, the tip of the substrate is expanded by the stopper. When the stopper is pushed in the axial direction of the substrate under the action of the restoring force caused by the deformation of the tip of the substrate, the outer surface of the stopper is strongly rubbed by the substrate. If the frictional force generated between the stopper and the substrate becomes too large, the stopper is scraped by the substrate. As a result, burrs are generated from the plug portion.

When the burr of the plug portion is sandwiched between the retaining portion and the outer edge portion of the plug portion, a gap is formed between them, and the chemical solution may flow out even without the above-mentioned external force. That is, burrs on the plug may cause an unintended outflow of the drug solution.

An object of the present invention is to provide a chemical solution supply tool and a chemical solution supply device capable of suppressing the occurrence of burrs on a plug portion.

The chemical solution feeder according to one aspect of the present invention is configured to be attachable to a container containing the chemical solution. The chemical solution feeder is configured to be mountable to the opening of the container, and has a tubular substrate having an opening region at the tip of which the chemical solution flows out, and a tubular substrate that is displaced in the axial direction of the substrate. It includes a plug portion that opens and closes the opening region, and a pressing portion that urges the plug portion so as to close the opening region. The substrate includes a retaining portion having a top that bulges toward the axis of the substrate so as to prevent the plug from exiting the substrate through the opening region. The plug portion includes an outer edge portion that closes the opening region by abutting on the retaining portion, and is formed of a resin that is harder than the substrate.

According to the above configuration, the plug portion includes an outer edge portion that closes the opening region by abutting on the retaining portion. Therefore, in order to arrange the plug portion in the substrate through the opening region, the tip portion of the substrate is used. It is necessary to deform the substrate so as to push it open. In this case, the outer edge portion of the plug portion comes into strong contact with the retaining portion of the substrate due to the restoring force accompanying the deformation of the substrate. Even if there is strong contact with the retaining portion of the substrate, the stopper portion is made of a resin harder than the substrate, so that the stopper portion is not easily scraped by the substrate. As a result, burrs from the plug portion are suppressed.

With respect to the above configuration, the outer edge portion may include an inclined surface that is inclined so that the plug portion gradually narrows toward the proximal end side.

According to the above configuration, the inclined surface of the outer edge portion of the plug portion is inclined so that the plug portion gradually narrows toward the proximal end side, so that when the plug portion is pushed into the substrate, the tip of the substrate The portion is gradually expanded by the inclined surface. Since the sudden deformation of the tip of the substrate is suppressed, the stopper is easily fitted into the substrate.

With respect to the above configuration, the top may include a curved outer shape in the vertical section.

According to the above configuration, the top of the retaining portion makes strong contact with the outer edge of the stopper when the stopper is fitted into the substrate through the opening region. Since the top portion has a curved outer shape in the vertical cross section, it is difficult to scrape even if it comes into strong contact with the outer edge portion of the plug portion. Therefore, the generation of burrs from the substrate is suppressed.

With respect to the above configuration, the pressing portion may be integrally formed with the plug portion.

According to the above configuration, since the pressing portion is integrally formed with the plug portion, the pressing portion can be formed from the same resin as the plug portion. Since the plug portion is formed of a hard resin, when the pressing portion is formed using this resin, the pressing portion has a large elastic modulus and a large urging force can be applied to the plug portion. In addition, the pressing portion can be housed in the substrate together with the plug portion.

The chemical solution supply device according to another aspect of the present invention includes the above-mentioned chemical solution supply tool and the container in which the chemical solution is contained and the opening is formed. The chemical feeder is attached to the opening of the container.

The manufacturing method according to another aspect of the present invention can be used for manufacturing a chemical solution feeder that can be attached to a container containing a chemical solution. The manufacturing method is to form a tubular substrate which is configured to be mountable to the opening of the container and has an opening region where the chemical solution flows out at the tip, and is displaced in the axial direction of the substrate. As a result, the plug portion that opens and closes the opening region is formed from a resin that is harder than the substrate, and the plug portion is fitted into the substrate through the opening region.

The method for manufacturing a chemical solution supply tool, a chemical solution supply device, and a chemical solution supply tool of the present invention can suppress burrs from the plug portion when the plug portion is fitted into the substrate.

It is a schematic front view of a chemical solution supply device. It is a schematic front view of the stopper part and the pressing part of a chemical solution supply tool. It is the schematic perspective view of the stopper part and the pressing part of a chemical solution supply tool. It is the schematic perspective view of the stopper part and the pressing part of a chemical solution supply tool. It is a schematic vertical sectional view of the substrate of a chemical solution feeder. It is a schematic perspective view of the base of the chemical solution feeder. It is a schematic front view of the stopper part of another chemical solution supply tool. It is the schematic perspective view of the plug part housed in the substrate. It is the schematic perspective view of the plug part attached to the plug part.

A chemical supply device is a product in which a chemical solution supply device is attached to an opening of a container (for example, a spout for a chemical solution into a container). A schematic cross-sectional view of the chemical supply device is shown in FIG. The chemical solution feeder includes the plug portion 100 and the pressing portion 300 shown in FIGS. 2 to 4, and the tubular base 200 shown in FIGS. 5 and 6. The plug portion 100 and the pressing portion 300 are members housed in the substrate 200. FIG. 2 is a schematic front view of the plug portion 100 and the pressing portion 300. 3 and 4 are schematic perspective views of the plug portion 100 and the pressing portion 300. FIG. 5 is a schematic vertical cross-sectional view of the base 200 attached to the mouthpiece 500 forming the opening of the container. FIG. 6 is a schematic perspective view of the substrate 200.

The substrate 200 is a member formed into an overall cylindrical shape using a resin (for example, High Density Polyethylene (HDPE)). Specifically, the substrate 200 includes an insertion tube portion 210 configured to be inserted into the mouth tube 500, and an exposed tube portion 220 exposed from the mouth tube 500.

The insertion cylinder portion 210 includes a tapered cylinder portion 211 that becomes thinner in the insertion direction (base end side) into the container, and an intermediate cylinder portion 212 located between the tapered cylinder portion 211 and the exposed cylinder portion 220. Includes. The inner peripheral surface of the tapered cylinder portion 211 is substantially parallel to the axis of the base 200, whereas the outer peripheral surface of the tapered cylinder portion 211 is inclined with respect to the axis of the base 200. The inclination of the outer peripheral surface of the tapered cylinder portion 211 is provided to facilitate the insertion of the base 200 into the mouth cylinder 500.

The outer peripheral surface of the intermediate cylinder portion 212 is substantially parallel to the axis of the substrate 200 and is in general contact with the inner peripheral surface of the mouth cylinder 500. The inner peripheral surface of the intermediate tubular portion 212 is substantially parallel to the axis of the substrate 200 except near the upper end portion, and is formed flush with the inner peripheral surface of the tapered tubular portion 211. The tip of the inner peripheral surface of the intermediate tubular portion 212 is inclined with respect to the axis of the substrate 200 so as to form a space that becomes narrower toward the proximal end side. The inclination of the tip portion of the inner peripheral surface of the intermediate cylinder portion 212 is provided to facilitate the insertion of the pressing portion 300 into the substrate 200.

The insertion cylinder portion 210 has a bottom ring portion 213 provided so as to project from the base end of the inner peripheral surface of the tapered cylinder portion 211 toward the axis of the base 200, and an opening direction of the mouth cylinder 500 from the bottom ring portion 213. It further includes a plurality of resistance protrusions 214 protruding toward the tip side). The bottom ring portion 213 is provided to support the plug portion 100 and the pressing portion 300 within the substrate 200. The plurality of resistance projections 214 are formed around the axis of the substrate 200 (that is, in the circumferential direction) at substantially equal intervals. Each of these resistance protrusions 214 is a triangular prism, and one of the corners of the triangular prism is formed so as to face the opening direction of the mouthpiece 500. The resistance projection 214 is provided to give resistance to the rotation of the plug portion 100 when the plug portion 100 rotates around the axis of the substrate 200.

The exposed cylinder portion 220 is formed on the tip side with respect to the insertion cylinder portion 210. The exposed cylinder portion 220 has an outer diameter larger than the outer diameter of the insertion cylinder portion 210, and has an annular shoulder surface 221 that extends outward in the radial direction from the tip portion of the insertion cylinder portion 210. The shoulder surface 221 abuts on the tip edge surface of the mouth cylinder 500, and prevents the substrate 200 from being pushed into the container from this position.

The exposed cylinder portion 220 forms an opening region 222 at the tip portion. The opening region 222 is formed to allow the outflow of the drug solution. The opening region 222 is wider than the opening region at the base end of the insertion tube portion 210 (that is, the region surrounded by the inner peripheral edge of the bottom ring portion 213).

In order to prevent the plug portion 100 from coming out of the base 200 through the opening region 222, a retaining portion 224 that bulges toward the axis of the base 200 is formed inside the exposed cylinder portion 220. The retaining portion 224 has a top having a curved shape in a vertical cross section. The ridgeline connecting the tops in the circumferential direction is the opening edge 223 surrounding the opening area 222. The retaining portion 224 forms a space that becomes wider from the opening region 222 toward the proximal end side.

The inner peripheral surface of the exposed cylinder portion 220 includes a tapered surface 225 forming a space that is widened in the direction opposite to the above-mentioned space surrounded by the retaining portion 224. The retaining portion 224 and the tapered surface 225 form a concave space in which the inner peripheral surface of the exposed cylinder portion 220 is recessed outward in the radial direction. The concave space is formed so as to accommodate the plug portion 100 and allow the plug portion 100 to be displaced in the axial direction of the substrate 200.

An annular regulation surface 226 facing the opening region 222 is formed in the exposed cylinder portion 220. The regulation surface 226 is provided to regulate the displacement of the plug portion 100 toward the proximal end side.

The stopper 100 is an overall disk-shaped member formed by using a resin harder than the substrate 200. For this embodiment, the hardness of the resin is assessed using the flexural modulus measured by the test method defined by ISO178 or JISK7171. When the substrate 200 is molded from high-density polyethylene, the stopper 100 may be molded from polyoxymethylene (POM). In this case, the flexural modulus of the plug 100 is 2,500 MPa, while the flexural modulus of the substrate 200 is 1,000 MPa.

The plug portion 100 includes a first tapered portion 101 having an exposed portion 110 exposed from the opening region 222 on the tip end side, and a second tapered portion 120 facing the opposite side to the exposed portion 110. 102 and is included. The first tapered portion 101 includes a truncated cone-shaped portion that gradually narrows toward the exposed portion 110 on the distal end side. The second tapered portion 102 is a substantially truncated cone-shaped portion that gradually narrows toward the base end surface 120. In these truncated cone-shaped portions, the plug portion 100 has a substantially hexagonal vertical cross section.

The exposed portion 110 of the first tapered portion 101 includes a substantially circular coated surface 111 substantially equal to the diameter of the opening region 222 and three massage bumps 112 raised from the coated surface 111. The coating surface 111 is used to contact-typely apply the chemical solution flowing out of the opening region 222 to the human body. The massage aneurysm 112 is used to massage the human body portion in contact with the coating surface 111.

The coating surface 111 is curved so as to smoothly rise from the opening region 222. Three liquid storage recesses 113 (circular recesses) are formed on the coating surface 111 at intervals in the circumferential direction. These liquid storage recesses 113 are formed at substantially equal intervals. The liquid storage recess 113 is used to store the chemical solution that has flowed to the coating surface 111 through the opening region 222.

The three massage aneurysms 112 are substantially hemispherical portions formed at intervals in the circumferential direction. Specifically, these massage aneurysms 112 are formed so that the ridge directions of the three massage aneurysms 112 are such that the axes of these massage aneurysms 112 are inclined outward in the radial direction.

The three massage aneurysms 112 are formed in the region between the three liquid storage recesses 113. Therefore, these massage aneurysms 112 and their liquid storage recesses 113 are formed alternately side by side in the circumferential direction.

The proximal end surface 120 of the second tapered portion 102 has an annular and flat band region formed along the outer peripheral edge of the proximal end surface 120. The diameter of the proximal surface 120 is less than the diameter of the opening region 222 and is substantially equal to the outer diameter of the regulatory surface 226. The flat band region of the base end surface 120 faces the regulation surface 226.

The annular outer edge portion 130 of the plug portion 100 is composed of the outer peripheral surfaces of the first tapered portion 101 and the second tapered portion 102. The ridge line 133 forming the boundary between the outer peripheral surfaces of the first tapered portion 101 and the second tapered portion 102 surrounds the portion of the plug portion 100 having the widest cross section. The outer edge 130 faces outward in the radial direction with respect to the outer peripheral edge of the coated surface 111 and the proximal surface 120 so that the plug 100 has a cross section that increases from the coated surface 111 and the proximal surface 120 toward the ridge line 133. It is bulging. The diameter of the circular region surrounded by the ridge line 133 is larger than the diameter of the opening region 222. The ratio of these diameters (diameter of the circular region surrounded by the ridge line 133 / diameter of the opening region 222) is in the range of 1.0 to 1.1, preferably in the range of 1.02 to 1.06, more preferably. Is set in the range of 1.03 to 1.05. This diameter ratio is set so that the substrate 200 is not plastically deformed when the plug portion 100 is fitted into the substrate 200.

The bulging shape of the outer edge portion 130 is substantially complementary to the concave space formed by the retaining portion 224 and the tapered surface 225 of the substrate 200. The outer peripheral surface of the first tapered portion 101 faces the retaining portion 224, and is referred to as a "contact surface 132" in the following description. The outer peripheral surface of the second tapered portion 102 faces the tapered surface 225 and is referred to as an "inclined surface 131" in the following description. The shape of the contact surface 132 is designed so that the contact surface 132 comes into surface contact with the retaining portion 224. The inclination angle of the inclined surface 131 is set so as not to cause abrupt deformation of the base 200 when the plug portion 100 is fitted into the base 200.

The width of the outer edge portion 130 (the size of the base 200 in the axial direction) is larger than the thickness of the concave space formed by the retaining portion 224 and the tapered surface 225 (that is, the size of the concave space in the axial direction of the base 200). small. Therefore, the plug portion 100 can move in the concave space in the axial direction of the substrate 200.

The pressing portion 300 is configured to elastically support the plug portion 100. The pressing portion 300 is integrally molded with the plug portion 100 using the same resin as the plug portion 100, and is formed separately from the substrate 200. As described above, the resin of the plug portion 100 is relatively hard, so that the pressing portion 300 has a large elastic modulus.

The pressing portion 300 includes a support ring portion 310 mounted on the bottom ring portion 213, and three elastic leg portions 320 extending from the support ring portion 310 to the base end surface 120 of the plug portion 100. The inner diameter and outer diameter of the support ring portion 310 substantially match the inner diameter and outer diameter of the bottom ring portion 213. Each of the three elastic leg portions 320 is curved in an arc shape so as to overlap the support ring portion 310 in a plan view, and extends toward the plug portion 100, and the base 200 from the tip of the spiral leg portion 321. Includes a tip leg 322 extending substantially parallel to the axis of. The base ends of the three spiral leg portions 321 are connected to the support ring portions 310 at substantially equal intervals in the circumferential direction. The three tip leg portions 322 are connected to the proximal end surface 120 at substantially equal intervals in the circumferential direction. The connecting portion of the tip end surface 322 and the base end surface 120 is inside the outer peripheral edge of the base end surface 120 so that the tip end leg portion 322 does not interfere with the portion of the base 200 forming the annular regulation surface 226. It is set. The height of the elastic leg portion 320 is set so that when the plug portion 100 and the pressing portion 300 are housed in the base 200, the elastic leg portion 320 is compressed in the axial direction of the base 200.

The chemical solution feeder further includes a resistance portion 400 that cooperates with the resistance projection 214 of the base 200 to give resistance to the rotation of the stopper portion 100 around the axis. The resistance portion 400 is integrally formed with the support ring portion 310. The resistance portion 400 includes three protrusions 410 protruding from the base end surface of the support ring portion 310 facing the bottom ring portion 213. These protrusions 410 are formed at substantially equal intervals. Each of these protrusions 410 has a substantially triangular pyramid shape. The apex of the triangular pyramid of the protrusion 410 contacts the bottom ring portion 213. The protrusions 410 are arranged between adjacent resistance protrusions 214.

The chemical solution feeder opens and closes the opening region 222 by utilizing the elastic deformation of the pressing portion 300. Since the elastic leg portion 320 of the pressing portion 300 housed in the substrate 200 is in a compressed state, the pressing portion 300 exerts an urging force on the plug portion 100 in the direction of pushing the plug portion 100 out of the opening region 222. .. As a result, the contact surface 132 of the outer edge portion 130 of the plug portion 100 comes into surface contact with the retaining portion 224 of the substrate 200. The surface contact region of the contact surface 132 and the retaining portion 224 functions as a seal region for preventing the outflow of the chemical solution from the opening region 222.

When the chemical supply tool is used for coating the chemical solution, the container to which the chemical solution supply tool is attached is held so that the coating surface 111 faces downward. When the coated surface 111 is pressed against the human body portion and the external force pressing the coated surface 111 exceeds the elastic force of the pressing portion 300, the plug portion 100 is placed inside (that is, upward) of the substrate 200 in the axial direction of the substrate 200. Displace to. As a result, the contact surface 132 is separated from the retaining portion 224, and the opening region 222 is connected to the internal space of the container. The chemical solution in the container flows out from the opening region 222 under the action of gravity.

When the plug portion 100 is further pushed into the substrate 200, the flat band region of the base end surface 120 of the plug portion 100 abuts on the regulation surface 226, and the displacement of the plug portion 100 is regulated by the regulation surface 226. Since the band region of the base end surface 120 and the regulation surface 226 are both flat, the flat band region of the base end surface 120 and the regulation surface 226 come into surface contact with each other. The surface contact region of the base end surface 120 and the regulation surface 226 functions as a seal region for preventing the outflow of the chemical solution from the opening region 222.

The amount of the chemical solution flowing out from the opening region 222 reaches a peak value when the distance between the contact surface 132 and the retaining portion 224 becomes substantially equal to the distance between the base end surface 120 and the regulation surface 226. From this state, the outflow amount decreases not only when the external force for pressing the coated surface 111 becomes weak, but also when the external force becomes strong. Therefore, an excessive outflow of the chemical solution when the pressing force on the coated surface 111 is increased is suppressed.

The chemical solution flowing out of the opening region 222 is supplied to the coating surface 111. A part of the chemical solution between the coating surface 111 and the human body portion is stored in the liquid storage recess 113. Since the amount of the chemical solution that can be retained between the coating surface 111 and the human body portion increases by the volume of the liquid storage recess 113, the flow of the chemical solution from the coating surface 111 is suppressed. While the coating surface 111 is rubbed against the human body portion, even if the external force pressing the coating surface 111 weakens or strengthens and the plug portion 100 closes the opening region 222, the chemical solution is stored in the liquid storage recess 113. Therefore, the drug solution can be continuously supplied to the human body part.

The massage aneurysm 112 massages the human body portion while the coated surface 111 is rubbed against the human body portion. When the force with which the massage hump 112 presses the human body portion is weakened, the plug portion 100 comes into contact with the retaining portion 224, and the outflow of the drug solution from the opening region 222 is stopped. On the contrary, even if the pressing force on the human body part is strengthened, the plug portion 100 comes into contact with the regulation surface 226 and the outflow of the chemical solution is stopped. Even in these cases, the liquid storage recess 113 enables continuous supply of the chemical solution.

During the massage of the human body, a force that tends to rotate the plug 100 around the axis of the substrate 200 may act. When the plug portion 100 rotates in response to this force, the protrusion 410 of the resistance portion 400 orbits around the axis of the substrate 200 while contacting the support ring portion 310. Since the contact portion of the protrusion 410 is the apex of the triangular pyramid, the contact area between the protrusion 410 and the support ring portion 310 is small. Therefore, while the protrusion 410 is moving in the moving section between the adjacent resistance protrusions 214, the chemical supply tool gives almost no resistance to the rotation of the plug portion 100. On the other hand, when the protrusion 410 comes into contact with the adjacent resistance protrusion 214, the chemical supply tool creates a strong resistance to the rotation of the stopper 100 and stops the rotation of the stopper 100.

Regarding the assembly of the chemical solution feeder, first, the stopper 100 is placed on the opening region 222. Since the base end surface 120 of the plug portion 100 has a size smaller than the opening region 222, a part of the second tapered portion 102 enters the substrate 200. After that, when the second tapered portion 102 is pushed into the substrate 200 in the axial direction, the second tapered portion 102 gradually expands the tip portion of the substrate 200. Since the second tapered portion 102 does not have a shape that suddenly expands the opening region 222, the plug portion 100 can be easily fitted into the substrate 200.

The restoring force of the substrate 200 due to the expansion of the opening region 222 is applied to the outer edge portion 130 of the plug portion 100 through the retaining portion 224. The restoring force increases as the contact portion of the plug portion 100 with respect to the retaining portion 224 approaches the ridge line 133. That is, when the plug portion 100 is fitted into the substrate 200, the outer edge portion 130 of the plug portion 100 exerts a strong restoring force on the outer edge portion 130 of the stopper portion 100 under the condition that the retaining portion 224 exerts a strong restoring force on the outer edge portion 130 of the stopper portion 100. A situation arises in which they rub against each other. Even in such a situation, since the plug portion 100 is formed by using a resin (polyoxymethylene) harder than the substrate 200, the outer edge portion 130 of the plug portion 100 is not easily scraped by the retaining portion 224. That is, the generation of burrs from the plug portion 100 is suppressed. In addition, since polyoxymethylene is used for molding the plug portion 100, the plug portion 100 has high slidability.

The generation of burrs from the substrate 200 is suppressed by the vertical cross-sectional shape of the retaining portion 224. Specifically, around the opening edge 223, the retaining portion 224 has a curved top. Therefore, even if the top of the retaining portion 224 rubs against the outer edge portion 130 of the plug portion 100 with a strong force, burrs from the retaining portion 224 are unlikely to occur.

When the plug portion 100 is fitted into the substrate 200 to the extent that the ridge line 133 of the plug portion 100 exceeds the opening region 222, the retaining portion 224 comes into contact with the first tapered portion 101 of the plug portion 100. The first tapered portion 101 of the plug portion 100 is tapered in the direction opposite to that of the second tapered portion 102, and a part of the restoring force acts in the direction of pushing the plug portion 100 into the substrate 200. Therefore, the plug portion 100 is easily accommodated in the base 200 after the plug portion 100 is pushed into the base 200 to some extent.

For the above embodiments, the substrate 200 is molded from high density polyethylene (HDPE) and the stopper 100 is molded from polyoxymethylene (POM). Alternatively, the substrate 200 may be molded from other resin materials such as low density polyethylene (LDPE) or polypropylene (PP). The stopper 100 may be molded from another resin material such as high density polyethylene (HDPE) or polypropylene (PP).

With respect to the above-described embodiment, the flexural modulus of the plug 100 is higher than the flexural modulus of the base 200. Specifically, the molding resin for the plug portion 100 may be selected so that the flexural modulus of the plug portion 100 is 1500 MPa or more and 4000 or less. Preferably, the flexural modulus of the plug 100 is 2000 MPa or more and 3500 MPa or less. More preferably, the flexural modulus of the plug portion 100 is 2500 MPa or more and 3000 MPa or less. The molding resin for the base 200 may be selected so that the flexural modulus of the base 200 is 500 MPa or more and 1500 MPa or less. The molding resin of the stopper portion 100 and the base portion 200 may be selected so that the difference between these bending elastic moduli is 1000 MPa or more.

With respect to the above-described embodiment, the pressing portion 300 is formed of the same resin as the plug portion 100. Therefore, the pressing portion 300 may be formed of a resin material such as polyoxymethylene (POM), high density polyethylene (HDPE) or polypropylene (PP) that can be used for molding the stopper portion 100. Alternatively, the pressing portion 300 may be molded from a resin material different from that of the plug portion 100. For example, when the stopper 100 is molded from high density polyethylene (HDPE) or polypropylene (PP), the pressing portion 300 may be molded from polyoxymethylene (POM).

Since the pressing portion 300 can be molded from a resin material different from that of the plug portion 100, the flexural modulus of the pressing portion 300 may be different from the flexural modulus of the plug portion 100. For example, the flexural modulus of the pressing portion 300 may be set in the range of 2,000 MPa to 4,000 MPa. Preferably, the flexural modulus of the pressing portion 300 is set in the range of 2,500 MPa to 3,000 MPa.

With respect to the above-described embodiment, the outer edge portion 130 of the plug portion 100 is entirely housed in the substrate 200. Alternatively, a portion of the outer edge 130 may be exposed from the open area 222 of the substrate 200. In this case, the plug portion 100 is formed so that the region surrounded by the outer edge portion of the remaining portion housed in the base 200 is wider than the opening region 222 of the base 200. As a result, the plug portion 100 is caught by the retaining portion 224, and the plug portion 100 is prevented from coming out of the substrate 200.

With respect to the above-described embodiment, the protrusion 410 and the resistance protrusion 214 of the resistance portion 400 are provided to prevent the rotation of the plug portion 100. However, the shapes of the protrusions 410 and the resistance protrusions 214 and the elastic force of the pressing portion 300 may be designed so that the resistance protrusions 214 ride on the protrusions 410 when the plug portion 100 is rotated with a strong force. When the resistance projection 214 rides on the projection 410, the elastic leg portion 320 of the pressing portion 300 is compressed and deformed in the axial direction of the substrate 200. As a result, the restoring force of the elastic leg 320 is increased. Since the increased restoring force is added to the force applied to the human body part by the user, the pressing force on the human body part is further increased, and the massage effect is enhanced.

With respect to the above-described embodiment, the pressing portion 300 is integrally molded with the plug portion 100. Alternatively, the pressing portion 300 may be formed separately from these. A chemical solution feeder having a pressing portion 300 formed separately from the plug portion 100 will be described with reference to FIGS. 7 to 9. FIG. 7 is a schematic front view of the pressing portion 300 formed separately from the plug portion 100. FIG. 8 is a schematic perspective view of the pressing portion 300 housed in the substrate 200. FIG. 9 is a schematic perspective view of the plug portion 100 attached to the pressing portion 300 of FIG. 7.

The pressing portion 300 of FIG. 7 differs from the pressing portion 300 shown in FIG. 2 only in that it has a ring member 330 connected to the tip of the tip leg portion 322 of the elastic leg portion 320. There is. The outer diameter of the ring member 330 is smaller than the outer diameter of the support ring portion 310. A cross-shaped through hole 331 is formed at the center of the ring member 330 as shown in FIG. The through hole 331 is formed in the axial direction of the substrate 200.

The pressing portion 300 is housed in the substrate 200 as shown in FIG. When no external force is applied to the elastic leg 320, the surface of the ring member 330 opposite to the surface to which the elastic leg 320 is connected is surrounded by the retaining portion 224 and the tapered surface 225 (see FIG. 1). It may be located in the internal space of the exposed cylinder portion 220. Alternatively, when no external force is applied to the elastic leg portion 320, the ring member 330 may protrude toward the tip end side from the internal space of the exposed cylinder portion 220.

The plug portion 100 of FIG. 9 is different from the plug portion 100 of FIG. 1 only in that it has a shaft portion 122 protruding from the center of the proximal end surface 120 toward the proximal end side. The shaft portion 122 has a cross-shaped cross section complementary to the cross-shaped through hole 331 of the ring member 330.

The shaft portion 122 of the plug portion 100 is inserted into the through hole 331 of the ring member 330 after the pressing portion 300 is housed in the substrate 200. After that, the plug portion 100 is pushed toward the proximal end side and pushed into the substrate 200.

With respect to the chemical solution feeder described with reference to FIGS. 7 to 9, since the pressing portion 300 is a separate body from the stopper portion 100, the resin material between the pressing portion 300 and the stopper portion 100 can be easily obtained. Can be different. That is, the resin material used for molding the pressing portion 300 can be selected regardless of the resin material of the plug portion 100 so that the elastic force required for the pressing portion 300 can be obtained.

The rotation of the plug portion 100 is prevented by the engagement of the shaft portion 122 with the cross-shaped through hole 331. Therefore, the chemical solution feeder can be used without rotating the stopper 100.

The drug solution supply device and the drug solution supply device of the above-described embodiment can be suitably used together with a container containing the drug solution.

100 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・..... inclined surface 200 ..................... base 222 ... ·······································································································・ ・ ・ ・ ・ ・ ・ ・ Pressing part

Claims (6)

A chemical supply tool that can be attached to a container containing a chemical solution.
A tubular substrate that is configured to be attachable to the opening of the container and has an opening region at the tip from which the drug solution flows out.
A plug portion that opens and closes the opening region by being displaced in the axial direction of the substrate, and a plug portion that opens and closes the opening region.
A pressing portion for urging the plug portion so as to close the opening region is provided.
The substrate comprises a retaining portion having a top that bulges toward the axis of the substrate to prevent the plug from exiting the substrate through the opening region.
The plug portion includes an outer edge portion that closes the opening region by abutting on the retaining portion, and is a chemical liquid feeder formed of a resin harder than the substrate. The chemical supply device according to claim 1, wherein the outer edge portion includes an inclined surface in which the plug portion is inclined so as to gradually narrow toward the proximal end side. The chemical supply tool according to claim 1 or 2, wherein the top portion includes a curved outer shape in a vertical cross section. The chemical supply tool according to any one of claims 1 to 3, wherein the pressing portion is integrally formed with the plug portion. The drug solution supply device according to any one of claims 1 to 4,
A container containing the chemical solution and having the opening formed therein.
The chemical solution supply device is a chemical solution supply device attached to the opening of the container. A method for manufacturing a chemical solution feeder that can be attached to a container containing a chemical solution.
Molding a tubular substrate that is configured to be attachable to the opening of the container and has an opening region through which the drug solution flows out at the tip.
The stopper portion that opens and closes the opening region by being displaced in the axial direction of the substrate is formed from a resin that is harder than the substrate.
A method for manufacturing a chemical solution feeder, comprising fitting the plug into the substrate through the opening region.

Images