JP4087004B2 - Drug supply device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a drug supply device that elutes a drug such as a dechlorination agent into supply water and sprinkles the supply water in which the drug is dissolved.
[0002]
[Prior art]
In recent years, a chemical supply shower has been devised in which a cartridge filled with a chemical such as a dechlorinating agent is incorporated in a shower head so that the chemical is eluted in the supply water when the shower is used.
[0003]
As shown in FIG. 8, this shower is filled with a medicine in a cartridge 2 loaded in the shower head 1, and a medicine outlet 5 is provided on the lower surface of the cartridge 2. The exfoliation film 6 for eluting the medicine in the cartridge 2 is attached. This exudation film 6 is constituted by a filter membrane that can withstand the weight head pressure of the drug, and exudes the drug in the cartridge 2 only when receiving the dynamic pressure of the supply water during shower use. In the case of this shower, the supply water does not pass through the inside of the cartridge 2 but an amount of medicine corresponding to the dynamic pressure (pressure distribution difference generated on the exudation film 6 due to the flow rate of the supply water) is exuded. After being eluted from 6, it goes around the outer peripheral side of the cartridge 2 and is discharged from the sprinkler 7.
[0004]
Further, in this shower, the cartridge 2 is accommodated in the shower head 1 so as to be slidable in the axial direction, and a valve seat (not shown) protrudes from a base portion in the shower head 1 so that the cartridge 2 is downward. When displaced, the medicine outlet 5 is closed by this valve seat. Therefore, when the shower in which the cartridge 2 is displaced downward is not used, the medicine outlet 5 is securely sealed by the valve seat so that the medicine in the cartridge 2 does not leak through the exudation film 6.
[0005]
[Problems to be solved by the invention]
However, in the conventional medicine supply shower, it is difficult to concentrate the supply water on the exudation film 6 at the lower end of the cartridge 2, and the medicine in the cartridge 2 cannot be stably eluted through the exudation film 6.
[0006]
Therefore, it is conceivable that a water flow guide is fixed in the shower head 1 and the supplied water is concentrated on the central portion of the exudation film 6 with the guide, but the cartridge 2 slides in the shower head 1 as described above. In the case of the structure, the distance between the water flow guide and the cartridge 2 changes as the cartridge 2 fluctuates, and it is difficult to obtain stable drug elution from the exudation film 6.
[0007]
In addition, it is conceivable that the supply water is concentrated on the central portion of the exudation film 6 by projecting a blade-shaped water flow guide at the lower end of the cartridge 2, but in this case, the protruding portion of the water flow guide is This causes another problem that it becomes difficult to manage during the distribution of goods.
[0008]
That is, when the cartridge is distributed as a product, the exudation film is sealed so that the drug does not leak from the exudation film due to environmental changes such as temperature, and the cartridge is prevented from being oxidized. The whole is housed in a bag of air barrier film, but if the water flow guide protrudes at the lower end of the cartridge, this guide will be in the way and it will not be possible to seal the exudation membrane completely. There is a high possibility that the air barrier film bag is damaged, and for this reason, management during distribution must be carefully performed.
[0009]
Therefore, the present invention makes it possible to concentrate the supply water on the exudation membrane portion at the lower end of the medicine filling cartridge without making the medicine filling cartridge into a complicated shape. At times, it is intended to provide a drug supply shower that can provide stable drug elution.
[0010]
[Means for Solving the Problems]
As a means for solving the above-described problem, the invention of claim 1 slidably accommodates a drug-filled cartridge in which a bleed film is attached to a drug outlet port at the lower end in a case in a water conduit, A valve seat that closes the medicine outlet when the medicine filling cartridge is lowered protrudes from the base in the case, and the medicine filling cartridge is removed from the valve seat by the dynamic pressure of the water supplied from the water supply port at the base of the case. At the same time, the drug is eluted from the exudation membrane and the supply water from which the drug is eluted flows out from the tip of the case, and the supply water flowing from the water supply port is supplied to the exudation membrane of the drug filling cartridge. The water flow guide for guiding is provided separately from the cartridge, and the water flow guide is slidably accommodated in the case together with the medicine filling cartridge.
[0011]
In addition, the water flow guide is extended to the bottom surface of the base portion having a discharge hole for allowing the valve seat to be freely inserted when displaced downward and discharging supply water to the exudation film during water supply, A guide vane that guides the supply water flowing in from the discharge hole to the discharge hole, and is formed on the upper surface of the base portion so as to form a radial guide path between the cartridge and the lower surface of the medicine filling cartridge. A plurality of stopper protrusions are provided.
[0012]
Further, a fixed guide having a guide projection for guiding the outer surface of the guide vane of the water flow guide is provided in the case in the water conduit, and the guide vane of the water guide abuts the guide projection and exceeds a predetermined amount of the water guide. A stopper claw is provided to restrict the upward displacement of the.
[0013]
In the case of this invention, when the supply water is introduced from the water supply port, the water flow guide is integrated with the medicine filling cartridge and is displaced upward in the case. To be concentrated on the exudation membrane portion of the medicine filling cartridge. Since the water flow guide always slides integrally with the medicine filling cartridge in the case, the flow path between the water flow guide and the medicine filling cartridge is always kept constant. Further, since the water flow guide is provided separately from the medicine filling cartridge, the lower surface of the medicine filling cartridge can be formed flat.
[0014]
When the water flow guide and the medicine filling cartridge are lowered, the valve seat closes the medicine outlet of the medicine filling cartridge through the discharge hole of the water flow guide. When the supply water flows in from the water supply port, the supply water is guided to the guide vanes of the water flow guide, gathers in the discharge holes, and is discharged from the discharge holes to the exudation film of the medicine filling cartridge. At this time, the drug is eluted from the exudation film, and the supply water in which the drug is dissolved passes through the guide path between the stopper guide of the water flow guide and the drug-filled cartridge and flows around the outer periphery of the cartridge and flows out from the tip of the case. The Further, the water flow guide is prevented from coming off the case by the contact between the stopper claw and the guide projection.
[0015]
According to a second aspect of the present invention, in the first aspect of the present invention, a bead is formed on the outer surface of the guide vane of the water flow guide along the axial direction in sliding contact with the guide protrusion of the fixed guide. In the case of this invention, the guide blade slides with the guide protrusion at the bead portion when the water flow guide is moved up and down. Since the bead is along the up-and-down movement direction of the water flow guide, the sliding resistance does not increase greatly even if the clearance with the guide protrusion is narrowed.
[0016]
According to a third aspect of the present invention, in the first or second aspect of the invention, the case in the water conduit is a shower head.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to FIGS.
[0018]
FIG. 1 and FIG. 2 show the overall structure of a medicine supply shower as a medicine supply apparatus according to the present invention. In FIG. 1, reference numeral 10 denotes a shower head as a case in the water passage conduit of this shower. The shower head 10 is formed by screwing a lower body 10a having a water supply port 11 at the lower end and an upper body 10b having a water spraying portion 12 at the upper end via a packing 13, and in a hollow portion formed inside the lower body 10a. Is accommodated in a state where a cylindrical can-shaped medicine filling cartridge 14 is urged downward by a spring 15.
[0019]
In the case of this embodiment, the inside of the medicine filling cartridge 14 is filled with a supersaturated aqueous solution of ascorbic acid as a dechlorinating agent having a strong chlorine reducing action, and this ascorbic acid is eluted in the shower head 10. Residual chlorine in tap water is removed.
[0020]
A medicine outlet 16 is formed in the bottom wall of the medicine filling cartridge 14. The outlet 16 receives the dynamic pressure of the supply water introduced into the shower head 10 and receives the medicine in the cartridge 14. An exudation film 17 to be eluted is attached. The exfoliation film 17 is formed of, for example, a filter membrane in which polyester is laminated on top and bottom of cellulose acetate, and can withstand at least the weight head pressure of the medicine in the cartridge 14 when the shower is not used (no leakage occurs). ing. Further, a flat patch plate 18 having a long hole-like opening is attached to the bottom of the medicine filling cartridge 14, and the bottom surface of the cartridge 14 is flattened by the patch plate 18 and the medicine outlet opening facing the outside of the cartridge 14 is provided. Sixteen openings are elongated.
[0021]
On the other hand, a bottomed cylindrical fixed guide 36 having a pair of semicircular holes 35a, 35b on the upper wall is attached to the center of the base in the shower head 10 by a small screw or the like (see FIG. 3). At the center of the upper wall of the fixed guide 36, a valve seat 20 provided with a seal packing 19 made of synthetic rubber is projected upward, and the peripheral wall of the fixed guide 36 is a cylindrical guide wall. 21. The valve seat 20 is in close contact with the medicine outlet 16 of the cartridge 14 in a state where the medicine filling cartridge 14 is displaced downward, thereby completely closing the medicine outlet 16. Therefore, the distal end portion of the valve seat 20 is formed in a long hole shape that is slightly larger than the opening of the medicine outlet port 16. Further, the radially outer edge of each semi-circular hole 35a, 35b on the upper wall of the fixed guide 36 extends a predetermined amount toward the radially inner side with respect to the upper end of the guide wall 21. The guide protrusion 22 in the present invention is configured. Further, as shown in FIG. 4, the arcs of the semicircular holes 35a and 35b have a required length in the axial direction, and are directed radially inward with respect to the upper end portion of the guide wall 21 like the edge portion. Two guide rails 22a each having a predetermined amount are provided.
[0022]
Further, a water flow guide 23 that guides the supply water flowing in from the water supply port 11 to the exudation film 17 portion of the medicine filling cartridge 14 is slidably accommodated in the base portion in the shower head 10. As shown in FIG. 3, the water flow guide 23 has a long hole-like discharge hole 25 formed at the center of a disk-like base portion 24, and a pair of guide blades 26, 26 extend on the lower surface of the base portion 24. In addition, four stopper protrusions 27 protrude from the upper surface of the base portion 24 so as to surround the periphery of the discharge hole 25.
[0023]
Here, the discharge hole 25 formed in the base portion 24 is a portion that collects and discharges the supply water to the exudation film 17 of the medicine filling cartridge 14, but in a state where the water flow guide 23 and the cartridge 14 are displaced downward, the valve The tip of the seat 20 seals the medicine outlet 16. Accordingly, at this time, the distal end portion of the valve seat 20 passes through the discharge hole 25 and closes the medicine outlet 16 of the medicine filling cartridge 14.
[0024]
Each guide vane 26 has an outer surface formed in a circular arc shape, while an inner side surface is formed to be gently narrowed so as to converge toward the discharge hole 25, and flows from the water supply port 11. Supply water is collected in the discharge hole 25 along the inner surface of the guide vane 26. The guide vane 26 is loosely inserted into the semicircular holes 35a and 35b and inserted into the guide wall 21 of the fixed guide 36, and is slid by the guide projections 22 and the guide rails 22a at the hole edges of the semicircular holes 35a and 35b. It is guided to move up and down freely. A plurality (two in this case) of beads 37 along the axial direction are integrally formed on the outer surface of each guide vane 26, and the beads 37 slide on the arc surface of the guide protrusion 22. It comes to touch. Therefore, when the water flow guide 23 is moved up and down, the sliding contact area between the guide blades 26 and the guide protrusions 22 and the sliding resistance can be kept small by the beads 37 at all times. The clearance of 22 can be reduced.
[0025]
Further, a stopper claw 28 projecting radially outward is extended at the tip of the guide vane 26. When the water flow guide 23 rises a predetermined amount in the shower head 10, the stopper claw 28 It abuts on the guide protrusion 22 and restricts further elevation of the water flow guide 23. The stopper claw 28 has a tapered surface 28a that is tapered toward the tip end side of the guide vane 26. When the water flow guide 23 is incorporated into the shower head 10, the stopper claw 28 is guided by the guide action of the tapered surface 28a. The leading end of the guide vane 26 gets over the guide protrusion 22 and is easily accommodated in the guide wall 21.
[0026]
Further, the four stopper protrusions 27 protruding from the upper surface of the base portion 24 abut on the lower surface of the medicine filling cartridge 14, and a guide path along the radial direction between the adjacent stopper protrusions 27, 27 and the lower surface of the cartridge 14. 29 is formed.
[0027]
Note that the relative displacement in the rotation direction of the water flow guide 23 and the fixed guide 36 is restricted by the engagement of the guide blades 26 and the semicircular holes 35a and 35b, and the medicine filling cartridge 14 and the shower head 10 are as shown in FIG. The relative displacement in the rotational direction is restricted by the engagement of the projections 38 projecting from the outer periphery of the lower end of the cartridge 14 at intervals of 180 degrees and the guide grooves 39 formed on the inner peripheral surface of the lower body 10a so as to converge toward the water supply port 11 side. ing.
[0028]
Since this medicine supply shower is configured as described above, when the supply water is introduced into the shower head 10 from the water supply port 11, the water flow guide 23 and the medicine filling cartridge 14 are supplied with the pressure of the supply water as shown in FIG. In response, the spring 15 is pressed and contracted to move upward. When the water flow guide 23 and the medicine filling cartridge 14 rise together as described above, the medicine filling cartridge 14 is separated from the valve seat 20 and at the same time, the supply water that is guided by the guide vanes 26 of the water flow guide 23 and collected in the discharge hole 25 is removed. It is discharged from the discharge hole 25 toward the center of the exuding film 17 of the medicine filling cartridge 14.
[0029]
Then, when the supply water is discharged to the exudation film 17 in this way, the drug in the drug filling cartridge 14 is eluted through the exudation film 17 due to the dynamic pressure, and the supply water in which the drug is dissolved is further supplied to the water flow guide 23. Through the guide path 29 formed between the cartridge 14 and the medicine filling cartridge 14, the cartridge 14 wraps around the outer periphery of the cartridge 14.
[0030]
When the supply water is stopped from this state, the medicine filling cartridge 14 and the water flow guide 23 are displaced downward by the force of the spring 15, and the medicine outlet 16 of the medicine filling cartridge 14 is closed by the valve seat 20. .
[0031]
In the case of this medicine supply shower, the water flow guide 23 is always operated integrally with the medicine filling cartridge 14 as described above, so that the passage distance between the water flow guide 23 and the cartridge 14 is always kept constant, Stable drug elution from the exudation film 17 can be obtained.
[0032]
Further, in this shower, since the lower surface of the medicine filling cartridge 14 is formed flat, when the medicine filling cartridge 14 is distributed, the exuding film 17 portion can be easily formed by the seal cap 30 or the like as shown in FIG. And it can seal reliably. Further, even when the medicine filling cartridge 14 in which the exudation film 17 is sealed with the seal cap 30 or the like is accommodated in the bag 31 of the air barrier film, there is no protruding portion at the lower end of the medicine filling cartridge 14, The problem that the bag 31 is damaged is less likely to occur, and the cartridge 14 itself is less likely to be damaged when the product is distributed.
[0033]
Furthermore, when the medicine filling cartridge 14 in the shower head 10 is replaced, the upper body 10b is removed from the lower body 10a of the shower head 10, the used cartridge 14 is pulled out from the lower body 10a, and a new cartridge 14 is removed. 10 is loaded. At this time, since the water flow guide 23 is prevented from coming off by the stopper claw 28 of the guide vane 26 and the guide projection 22 on the shower head 10 side, even if the lower body 10a is turned upside down at the time of replacement, it does not fall off the lower body 10a. . Therefore, in this shower, the medicine filling cartridge 14 can be replaced very easily.
[0034]
Further, the water flow guide 23 is for concentrating the supply water introduced from the water supply port 11 of the shower head 10 on the exuding film 17 portion of the medicine filling cartridge 14, so that the water flow guide 23 and the fixed guide 36 slide. In this shower, the guide vanes 26 of the water flow guide 23 are slidably brought into contact with the guide protrusions 22 of the fixed guide 36 in the shower. When the discharge flow rate from the section 12 is suddenly increased, the flow rate of the supply water passing through the water flow guide 23 is also increased rapidly, and a force is exerted to push the guide vanes 26 of the water flow guide 23 in the radial direction. In this case, since the sliding resistance can be kept low by the guide protrusion 22 and the bead 37, the malfunction of the water flow guide 23 may be caused. No, it is possible to significantly reduce the leakage of feed water from the clearance with minimal sliding clearance between the guide 23 and 31. Therefore, in this shower, it is possible to guide the supplied water to the exuding film 17 without waste.
[0035]
By the way, although the example which filled the medicine filling cartridge 14 with the supersaturated aqueous solution of ascorbic acid was demonstrated above, not only this but a powder or a solid chemical | medical agent (it is not restricted to ascorbic acid) like FIG. It is also possible to employ a type of cartridge 44 that fills the cartridge. It is also possible to fill the cartridge with a chemical other than the dechlorinating agent, such as a fragrance, a bactericidal agent, a traditional Chinese medicine, a milky lotion, and a pH adjusting agent. In FIG. 6, the same parts as those shown in FIGS. 1 and 2 are denoted by the same reference numerals.
[0036]
The medicine filling cartridge 44 will be briefly described. The cartridge 44 is provided with a medicine outlet 16 at the lower end of the cartridge case 45 and an air outlet 50 at the upper end. The medicine outlet 16 is similar to the above-described embodiment. An exudation film 17 is attached to the surface. A pair of hydrophobic gas permeable membranes 46 made of ethylene tetrafluoride resin or the like are arranged at a predetermined interval in the air outlet 50, and an air chamber 47 is formed between the gas permeable membranes 46 and 46. Further, a medicine filling chamber 48 is formed between the ventilation film 46 and the exudation film 17 at the lower end, and the inside thereof is filled with powder or solid medicine P.
[0037]
When the supply water is introduced into the exuding membrane 17 through the water flow guide 23 when the medicine filling cartridge 44 is used for the first time in the shower, the supply water extrudes the air in the medicine filling chamber 48 and the filling chamber 48. The drug P is dissolved at that time, and the drug filling chamber 48 is filled with the drug solution. Since the medicine filling chamber 48 is closed by the hydrophobic gas permeable membrane 46, the medicine filling chamber 48 is sealed in a liquid-tight state when the supply water comes into contact with the lower surface of the gas permeable membrane 46.
[0038]
FIG. 7 is a cross-sectional view of the lower body 10a from which the fixed guide 36, the water flow guide 23, the medicine filling cartridge 14 (44) and the like are removed. As shown in FIG. 7, a guide groove 39 formed on the inner wall of the lower body 10a. Is formed in a shape that gently squeezes toward the bottom and finally converges to a predetermined width, and can reliably and easily load the medicine filling cartridge 14 (44) into the shower head 10. it can.
[0039]
That is, when loading the medicine filling cartridge 14 (44), the cartridge 14 (44) is loaded along the protrusion 38 on the outer periphery of the lower end along the guide groove 39. As shown in this example, the upper side of the guide groove 39 is Since the diameter is gradually increased, the user can insert the cartridge 14 (44) into the lower body 10a with a rough register, and the exudation membrane 17 of the cartridge 14 (44) and the valve seat 20 can be accurately matched. It becomes possible to load the cartridge 14 (44) at a proper position.
[0040]
Therefore, coupled with the fact that the water flow guide 23 is formed separately from the cartridge 14 (44) and is assembled in advance to the shower head 10, the burden on the user when loading the cartridge is extremely reduced.
[0041]
【The invention's effect】
As described above, according to the first aspect of the present invention, the water flow guide for guiding the supply water flowing in from the water supply port to the exudation film of the medicine filling cartridge is provided separately from the cartridge, and the water flow guide is connected to the water passage along with the medicine filling cartridge. In order to slidably accommodate in the inner case, the supply water is supplied to the exudation membrane portion by a separate water flow guide that always operates integrally with the medicine filling cartridge without complicating the lower end of the medicine filling cartridge. Concentrated and stable drug elution can be obtained. And according to this invention, since the lower end of the medicine filling cartridge can be made into a flat shape, it becomes possible to seal the exudation membrane portion easily and reliably at the time of shipment of the medicine filling cartridge. As a result, the management of the medicine-filled cartridge at the time of product distribution becomes easy.
[0042]
In addition, the water flow guide allows the valve seat to be freely inserted when displaced downward, and has a base portion having a discharge hole for discharging supply water to the exudation film when water is supplied, and extends from the bottom surface of the base portion to flow from the water supply port. A plurality of guide vanes for guiding the supplied water to the discharge holes, and projecting on the upper surface of the base portion so as to form a radial guide path between the cartridge and the lower surface of the medicine filling cartridge Since the stopper protrusion is provided, the supply water flowing from the water supply port is guided to the discharge hole by the guide vane, and the supply water discharged from the discharge hole to the exudation film is formed by the stopper protrusion and the medicine filling cartridge. Can be smoothly wound around the outer peripheral side of the cartridge.
[0043]
Further, a fixed guide having a guide projection for guiding the outer surface of the guide vane of the water flow guide is provided in the case in the water conduit, and the guide vane of the water guide abuts the guide projection and exceeds a predetermined amount of the water guide. Since the stopper claw that restricts the upward displacement of the cartridge is provided, it is possible to reliably prevent the water flow guide from coming off from the case, and to eliminate the problem that the water flow guide is lost when the medicine-filled cartridge is replaced.
[0044]
According to a second aspect of the present invention, in the first aspect of the invention, a bead is formed on the outer surface of the guide vane of the water flow guide along the axial direction in sliding contact with the guide projection of the fixed guide. The sliding resistance does not increase greatly even if the width is narrowed. Therefore, the supply water flowing from the water supply port can be reliably guided to the exudation film without any loss without causing a malfunction of the guide vanes.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of the present invention.
FIG. 2 is a sectional view showing the same embodiment.
FIG. 3 is a perspective view of a part showing the embodiment.
4 is a rear view of the fixed guide shown in FIG. 3 as viewed in the direction of arrow A. FIG. 5 is a cross-sectional view showing the medicine-filled cartridge according to the embodiment when the product is distributed.
FIG. 6 is a cross-sectional view showing another embodiment of the present invention.
FIG. 7 is a cross-sectional view showing the same embodiment.
FIG. 8 is a schematic diagram showing a conventional technique.
[Explanation of symbols]
10 ... Shower head (case in water conduit)
DESCRIPTION OF SYMBOLS 11 ... Water supply port 14, 44 ... Drug filling cartridge 16 ... Drug delivery port 17 ... Exudation membrane 20 ... Valve seat 22 ... Guide protrusion 23 ... Water flow guide 24 ... Base part 25 ... Discharge hole 26 ... Guide blade 27 ... Stopper protrusion 28 ... Stopper claw 29 ... guide path 37 ... bead

Claims (3)

A medicine filling cartridge having a bleed film attached to the medicine outlet at the lower end is slidably accommodated in a case in the water conduit, while the medicine outlet is placed at the base in the case when the medicine filling cartridge is lowered. Protruding a valve seat to close, and separating the drug filling cartridge from the valve seat by the dynamic pressure of the supply water flowing from the water supply port at the base of the case, and at the same time, the drug is eluted from the exudation membrane and the drug is eluted A drug supply device that allows water to flow out of the case tip,
A water flow guide for guiding the supply water flowing in from the water supply port to the exudation film of the medicine filling cartridge is provided separately from this cartridge, and this water flow guide is slidably accommodated in the case together with the medicine filling cartridge ,
The water flow guide
A base portion having a discharge hole that allows the valve seat to be freely inserted when displaced downward and discharges supply water to the exudation film during water supply;
A guide vane extending on the lower surface of the base portion and guiding the supply water flowing from the water supply port to the discharge hole;
A plurality of stopper protrusions that project from the upper surface of the base portion and form a radial guide path between the cartridge and the lower surface of the medicine-filled cartridge;
With
A fixed guide having a guide protrusion for guiding the outer surface of the guide vane of the water flow guide is provided on the case, and a stopper claw for restricting the upward displacement of the water flow guide by a predetermined amount or more by contacting the guide protrusion of the water flow guide. A medicine supply device provided respectively . The drug supply device according to claim 1, wherein a bead is formed on the outer surface of the guide vane of the water flow guide along the axial direction in sliding contact with the guide protrusion of the fixed guide. The medicine supply device according to claim 1 or 2, wherein the case in the water conduit is a shower head.

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