JP7162342B2 - Cap member for water purifier cartridge - Google Patents

Description

The present invention relates to a cap member used in a water purifier cartridge.

Water purifiers include, for example, a faucet-connected type that is directly connected to a tap water faucet, a faucet-integrated type that is integrally installed inside the faucet, a faucet or a branch faucet provided on the faucet that connects to a hose or A stationary type that is installed near the faucet by connecting with a pipe, an undersink type that is installed inside the sink, and a portable type that can be carried indoors such as homes and restaurants, or outdoors. Types (for example, pitcher-type water purifiers, pot-type water purifiers) are known.

Such water purifiers use adsorbents such as activated carbon and hollow fiber membranes to remove residual chlorine (hypochlorous acid), musty smell, turbidity, microorganisms, and the like from tap water. Further, in such a water purifier, it has been proposed to replaceably house a water purifier cartridge provided with an adsorbent in order to facilitate replacement of the soiled adsorbent (for example, Patent Documents 1 and 2). .

Japanese Unexamined Patent Application Publication No. 2012-2027 Japanese Unexamined Patent Application Publication No. 2016-117002

The water purifier cartridge includes a cylindrical shaft member, a molded adsorbent formed on the outer peripheral surface of the shaft member, a cap member attached to one end of the shaft member, and attached to the other end of the shaft member. There is also one that has a covered cover member. In such a configuration, the cap member and cover member are fixed to the shaft member using an adhesive. However, when a large amount of adhesive is used, the adhesive protrudes into the cylindrical hole and narrows the flow path of purified water, which tends to reduce the performance of the water purifier. Also, when the amount of the adhesive used is small, the bonding strength of the joint is lowered, and the joint tends to be easily damaged.

The present invention has been made in view of the above circumstances, and includes a cylindrical shaft member, a shaped attracting body formed on the outer peripheral surface of the shaft member, and a cap member attached to one end of the shaft member. It is an object of the present invention to provide a cap member that can be firmly adhered to a shaft member and that can suppress the adhesive agent from protruding into a cylindrical hole in a water purifier cartridge.

The cap member of the present invention, which can solve the above problems, comprises a cylindrical shaft member, a shaped adsorbent formed on the outer peripheral surface of the shaft member, a planar portion in contact with the shaped adsorbent, and the A cap member for use in a water purifier cartridge having a cap member into which one end of the shaft member is inserted and having an insertion hole communicating with the cylindrical hole of the shaft member, wherein the insertion hole of the cap member is A large-diameter portion and a small-diameter portion having an inner diameter smaller than that of the large-diameter portion are provided in order from the surface on which the shaft member is inserted, and the inner peripheral surface of the large-diameter portion is the outer peripheral surface of the shaft member. A positioning member is provided that abuts on the.

Since the insertion hole of the cap member is composed of a large diameter portion and a small diameter portion, when the shaft member is inserted into the insertion hole, the gap between the shaft member and the shaft member is large at the large diameter portion, and the gap between the shaft member and the shaft member is large at the small diameter portion. gap becomes smaller. Therefore, when the cap member is fixed to the shaft member using an adhesive, the adhesive can enter the gap between the cap member and the shaft member at the large diameter portion, increasing the bonding area and improving the bonding strength. do. Further, in the small-diameter portion, since it is difficult for the adhesive to enter the gap between the cap member and the shaft member, the adhesive is prevented from overflowing into the cylindrical hole of the shaft member.

Furthermore, since the positioning member is provided on the inner peripheral surface of the large-diameter portion, misalignment of the shaft member is suppressed, and the gap between the outer periphery of the shaft member and the inner periphery of the large-diameter portion becomes uniform. Therefore, the adhesive is applied uniformly over the circumferential direction of the shaft member, and the adhesive strength is further improved.

By using the cap member of the present invention, the cap member and the shaft member can be firmly adhered to each other in the water purifier cartridge, and the adhesive agent can be prevented from protruding into the cylindrical hole of the shaft member.

It is a sectional view showing an example of a cartridge for water purifiers. FIG. 2 is an exploded perspective view of the water purifier cartridge of FIG. 1; FIG. 2 is a side view showing an example of a water purifier containing a water purifying cartridge; FIG. 4 is a plan view showing an example of a cap member; FIG. 5 is a back view of the cap member shown in FIG. 4; FIG. 5 is a cross-sectional view taken along line AA in FIG. 4; FIG. 5 is a cross-sectional view taken along line BB in FIG. 4; 5 is a cross-sectional view taken along line CC of FIG. 4; FIG. 5 is a perspective view of the cap member shown in FIG. 4; FIG. 5 is a schematic cross-sectional view showing a state in which the shaft member is fixed to the cap member shown in FIG. 4 using an adhesive; FIG. FIG. 10 is a plan view showing another example of the cap member; FIG. 12 is a rear view of the cap member shown in FIG. 11; FIG. 12 is a cross-sectional view taken along line AA of FIG. 11; FIG. 12 is a cross-sectional view taken along line BB of FIG. 11; 12 is a perspective view of the cap member shown in FIG. 11; FIG. 12 is a schematic cross-sectional view showing a state in which the shaft member is fixed to the cap member shown in FIG. 11 using an adhesive; FIG.

The cap member of the present invention includes a cylindrical shaft member, a shaped attracting body formed on the outer peripheral surface of the shaft member, a flat portion abutting on the shaped adsorbing body, and one end of the shaft member being inserted. and a cap member having an insertion hole communicating with the cylindrical hole of the shaft member, wherein the insertion hole of the cap member is a surface into which the shaft member is inserted. It has a large-diameter portion and a small-diameter portion having an inner diameter smaller than that of the large-diameter portion in order from the side, and a positioning member that contacts the outer peripheral surface of the shaft member is provided on the inner peripheral surface of the large-diameter portion. It is characterized by

Since the insertion hole of the cap member is composed of a large diameter portion and a small diameter portion, when the shaft member is inserted into the insertion hole, the gap between the shaft member and the shaft member is large at the large diameter portion, and the gap between the shaft member and the shaft member is large at the small diameter portion. gap becomes smaller. Therefore, when the cap member is fixed to the shaft member using an adhesive, the adhesive can enter the gap between the cap member and the shaft member in the large-diameter portion, but the gap between the cap member and the shaft member in the small-diameter portion is not sufficient. It becomes difficult for the adhesive to enter the gap between the Therefore, by providing the large-diameter portion, the bonding area between the cap member and the shaft member is increased, and the bonding strength is improved. Further, by providing the small diameter portion, the adhesive is suppressed from flowing through the insertion hole to the tip of the shaft member, and the adhesive is prevented from protruding into the cylindrical hole of the shaft member.

Furthermore, since the positioning member is provided on the inner peripheral surface of the large-diameter portion, misalignment of the shaft member is suppressed, and the gap between the outer periphery of the shaft member and the inner periphery of the large-diameter portion becomes uniform in the circumferential direction. Therefore, the adhesive can be applied uniformly over the circumferential direction of the shaft member, and the adhesive strength is further improved.

The cap member has a flat portion and an insertion hole provided in the flat portion. The insertion hole of the cap member has a large-diameter portion and a small-diameter portion having an inner diameter smaller than that of the large-diameter portion. and The plane view shape of the plane portion is not particularly limited, and may be a circular shape, an elliptical shape, a polygonal shape, or the like, and may be appropriately adjusted according to the cross-sectional shape of the shaped adsorbent. Further, the planar shape of the insertion hole is not particularly limited, and may be circular, elliptical, polygonal, or the like, and may be appropriately adjusted according to the cross-sectional shape of the shaft member.

The ratio (d1/d0) between the inner diameter (d1) of the large diameter portion and the outer diameter (d0) of the shaft member is preferably 1.05 or more, more preferably 1.15 or more, and still more preferably 1.15. It is 2 or more, preferably 2 or less, more preferably 1.75 or less, and still more preferably 1.5 or less. If the ratio (d1/d0) is 1.05 or more, the adhesive will easily flow into the gap, and by increasing the amount of adhesive applied, the adhesive strength will be further improved. function as

When the outer diameter of the shaft member is 5 mm to 20 mm, the difference (d1-d0) between the inner diameter (d1) of the large diameter portion and the outer diameter (d0) of the shaft member is preferably 0.5 mm or more. , more preferably 1.0 mm or more, more preferably 2 mm or more, and preferably 4 mm or less, more preferably 3.5 mm or less, still more preferably 3 mm or less. If the difference (d1-d0) is 0.5 mm or more, the adhesive will easily flow into the gap, and by increasing the amount of adhesive applied, the adhesive strength will be further improved. function as

The ratio (d2/d0) between the inner diameter (d2) of the small diameter portion and the outer diameter (d0) of the shaft member is preferably 1.002 or more, more preferably 1.005 or more, and still more preferably 1.01. 1.05 or less is preferable, 1.03 or less is more preferable, and 1.02 or less is still more preferable. If the ratio (d2/d0) is 1.002 or more, assembly failure due to interference does not occur, and assembly workability is further improved. inflow is more suppressed.

When the outer diameter of the shaft member is 5 mm to 20 mm, the difference (d2-d0) between the inner diameter (d2) of the small diameter portion and the outer diameter (d0) of the shaft member is preferably 0.05 mm or more, It is more preferably 0.08 mm or more, still more preferably 0.1 mm or more, preferably 1 mm or less, more preferably 0.5 mm or less, still more preferably 0.2 mm or less. If the difference (d2-d0) is 0.05 mm or more, assembly failure due to interference will not occur, and assembly workability will be further improved. is more suppressed.

When the length of the shaft member is 50 mm to 200 mm, the thickness (T1) of the large diameter portion is preferably 0.5 mm or more, more preferably 0.75 mm or more, still more preferably 1 mm or more, and 5 mm The following is preferable, more preferably 3 mm or less, and still more preferably 2 mm or less. If the thickness (T1) is 0.5 mm or more, the bonding area between the adhesive and the shaft member increases and the bonding strength is further improved.

When the length of the shaft member is 50 mm to 200 mm, the thickness (T2) of the small diameter portion is preferably 0.5 mm or more, more preferably 0.75 mm or more, still more preferably 1 mm or more, and 5 mm or less. is preferable, more preferably 2.5 mm or less, and still more preferably 2 mm or less. If the thickness (T2) is 0.5 mm or more, the insertion of the shaft member further improves the strength.

The ratio (T1/T2) between the thickness (T1) of the large diameter portion and the thickness (T2) of the small diameter portion is preferably 0.5 or more, more preferably 1 or more, and still more preferably 1.5 or more. and is preferably 5 or less, more preferably 3 or less, and still more preferably 2 or less. If the ratio (T1/T2) is 0.5 or more, the adhesion area between the adhesive and the shaft member increases, thereby improving the adhesive strength.

The inner peripheral surface of the large diameter portion is provided with a positioning member that abuts on the outer peripheral surface of the shaft member. Since the positioning member is provided on the inner peripheral surface of the large-diameter portion, misalignment of the shaft member is suppressed, and the gap between the outer periphery of the shaft member and the inner periphery of the large-diameter portion becomes uniform. Therefore, the adhesive is applied uniformly over the circumferential direction of the shaft member, and the adhesive strength is further improved.

Preferably, three or more positioning members are provided per insertion hole, and more preferably four or more. By providing three or more positioning members for each insertion hole, misalignment of the shaft member can be more reliably suppressed. The upper limit of the number of positioning members per insertion hole 3 is not particularly limited, but if the number is too large, the space into which the adhesive flows is reduced.

The ratio of the portion provided with the positioning member to the inner circumference of the large diameter portion is preferably 10% or more, more preferably 20% or more, and preferably 50% or less, more preferably 40% or less. When the ratio is 10% or more, the insertability of the shaft member is improved, and when the ratio is 50% or less, the amount of adhesive flowing into the large-diameter portion is improved.

It is preferable that the insertion hole of the cap member is provided with a tapered guiding surface at the edge of the large diameter portion. By forming a guiding surface on the edge of the large diameter portion, the shaft member can be easily inserted into the insertion hole, and the adhesive can easily flow into the gap between the large diameter portion and the shaft member. Similarly, it is preferable that the inner peripheral surface of the positioning member is provided with a tapered guiding surface at the end on the upstream surface side. By providing the guiding surface at the upstream end of the positioning member, the shaft member can be easily inserted into the positioning member.

The inclination of the guiding surface of the large diameter portion is not particularly limited, but the angle formed by the guiding surface (slope) and the inner wall of the large diameter portion is preferably 5° or more, more preferably 10° or more, and still more preferably 30°. ° or more, preferably 60° or less, more preferably 45° or less, and still more preferably 40° or less. If the inclination of the guide surface is 5° or more, the adhesive will easily flow into the gap between the large-diameter portion and the shaft member, and if it is 60° or less, the surface will act as a guide to facilitate the insertion of the shaft member. The guiding surface is regarded as part of the large-diameter portion, and the thickness of the portion where the guiding surface is formed is included in the thickness of the large-diameter portion.

It is preferable that an abutment portion with which the tip of the shaft member abuts is provided on the side of the insertion hole opposite to the side where the shaft member is inserted. By providing the contact portion, when inserting the shaft member, it is possible to easily adjust the amount of insertion of the shaft member, thereby facilitating positioning in the axial direction. In addition, the contact portion may be provided with a contact portion extending inward of the insertion hole on the side opposite to the upstream side surface of the flat portion (hereinafter sometimes referred to as "downstream side surface"). Alternatively, a portion having an inner diameter smaller than the outer diameter of the shaft member may be provided on the downstream side of the small diameter portion of the insertion hole, and this portion may be used as the contact portion.

It is preferable that the cap member has a ridge formed around the insertion hole on a surface (upstream side surface) of the planar portion facing the shaped adsorbent. By forming the ridges, when the adhesive spreads along the flat portion, it is dammed by the ridges. As a result, even when the amount of adhesive applied is increased, it is suppressed that the adhesive spreads excessively along the flat portion and the adhesive protrudes to the outer surface of the water purifier cartridge.

The height of the ridge is preferably 0.3 mm or more, more preferably 0.5 mm or more, still more preferably 1 mm or more, and preferably 5 mm or less, more preferably 1.75 mm or less, still more preferably 1.5 mm. It is below. If the height of the ridges is 0.3 mm or more, the adhesive can be prevented from spreading excessively on the damming flat portion, and the application can be uniform.

The cross-sectional shape of the ridges is not particularly limited, and examples thereof include a semicircular shape, a semielliptical shape, and a polygonal shape. The ridge may be formed at least partly around the insertion hole, and may be formed entirely around the insertion hole. The region where the ridges are formed may be appropriately adjusted according to the shape of the cap member.

Further, it is preferable that the cap member has a groove formed around the insertion hole on a surface of the flat portion facing the shaped adsorbent. By forming the grooves, it is possible to increase the amount of adhesive to be applied and to further increase the bonding strength. Further, when the water purifier cartridge is assembled, the adhesive is applied to the insertion hole outside the groove, thereby preventing the adhesive from flowing into the insertion hole before the shaft member is inserted.

The depth of the groove is preferably 0.3 mm or more, more preferably 0.5 mm or more, still more preferably 1 mm or more, and preferably 5 mm or less, more preferably 2 mm or less, and still more preferably 1.5 mm or less. . If the depth of the groove is 0.3 mm or more, the timing of reaching the insertion hole can be delayed by the adhesive flowing into the groove, thereby preventing the adhesive from flowing into the insertion hole earlier than the shaft member. If the thickness is 5 mm or less, a compact shape can be obtained without setting the thickness of the cap member excessively thick.

The cross-sectional shape of the groove is not particularly limited, and examples thereof include a semicircular shape, a semielliptical shape, and a polygonal shape. The groove may be formed at least partly around the insertion hole, and may be formed entirely around the insertion hole. The region in which the groove is formed may be appropriately adjusted according to the shape of the cap member.

The cap member may have a bank portion formed on the peripheral edge portion of the upstream side surface. It is preferable that the inner circumference of the bank portion is formed larger than the outer circumference of the shaped adsorbent formed on the outer circumference of the shaft member. With this configuration, when the shaft member is inserted into the insertion hole of the cap member, the bank portion covers the end portion of the shaped adsorbent. This suppresses the adhesive applied between the cap member and the shaped adsorbent from protruding to the outer surface of the water purifier cartridge.

Hereinafter, the cap member used in the water purifier cartridge of the present invention will be described with reference to the drawings. First, examples of water purifier cartridges and water purifiers to which the cap member of the present invention is applied will be described. FIG. 1 is a cross-sectional view showing an example of a water purifier cartridge. 2 is an exploded perspective view of the water purifier cartridge of FIG. 1. FIG. FIG. 3 is a side view showing a preferred embodiment of the water purifier. The water purifier cartridge and water purifier to which the cap member of the present invention can be applied are not limited to the embodiments shown in FIGS.

(Cartridge for water purifier)
The water purifier cartridge 20 shown in FIGS. 1 and 2 includes a cylindrical shaft member 21, a shaped adsorbent 22 laminated on the outer surface of the shaft member 21, and a cap attached to one end of the shaft member 21. It has a member 1 and a cover member 23 attached to the other end of the shaft member 21 . A connection member 24 is connected to the cap member 1 . Incidentally, the cap member 1 and the cover member 23 are fixed to the shaft member 21 and the shaped adsorbent 22 using an adhesive (not shown).

The shaft member 21 has a cylindrical shape and is formed with a plurality of through holes 21a. Water can flow into the cylinder from the outside of the cylinder through the through hole 21a. A nonwoven fabric 25 is wound around the outer surface of the shaft member 21 . The nonwoven fabric 25 prevents the shaped adsorbent 22 from entering the cylinder of the shaft member 21 . A nonwoven fabric 26 for protecting the shaped adsorbent 22 is wrapped around the shaped adsorbent 22 . In addition, the cross-sectional shape of the shaft member 21 is not limited to a circular shape, and may be an elliptical shape, a polygonal shape, or the like. The planar view shape of the through-hole 21a is not particularly limited, and examples thereof include a polygonal shape, a circular shape, an elliptical shape, and the like. The number of shaft members 21 is not limited to two, and the number of shaft members 21 may be one or three or more.

The water purifier cartridge 20 uses the outside of the shaped adsorbent 22 as a raw water channel. Raw water passes through the shaped adsorbent 22 and flows into the shaft member 21 . At this time, the water is purified by an adsorbent (not shown) contained in the shaped adsorbent 22 to become purified water.

The cover member 23 has a flat portion 23a and a convex portion 23b provided on the flat portion. The projection 23b is fitted into the cylinder of the shaft member 21 to close one end of the cylinder hole of the shaft member 21. As shown in FIG. The planar portion 23a abuts on the shaped adsorbent 22 and closes one side surface of the shaped adsorbent 22. As shown in FIG. The cover member 23 prevents the purified water that has flowed into the cylinder of the shaft member 21 from leaking out from the cover member 23 side.

The cap member 1 has a flat portion 2 and an insertion hole 3 provided in the flat portion 2 . An end portion of the shaft member 21 is inserted into the insertion hole 3, and the cylindrical hole and the insertion hole 3 are communicated with each other. The flat portion 2 abuts on the shaped adsorbent 22 and closes the side surface of the shaped adsorbent 22 . Purified water that has flowed into the cylinder of the shaft member 21 is discharged downstream of the cap member 1 (the side to which the connecting member 24 is connected) through the insertion hole 3 of the cap member 1 . The flat portion 2 prevents raw water from flowing into the downstream side of the cap member 1 .

A connection member 24 is connected to the cap member 1 . This connection member 24 is formed so as to be connectable to the water purifier main body. In the gap formed by the cap member 1 and the connecting member 24, hollow fibers for removing fine powder flowing out from the shaped adsorbent 22, sterilizing ceramic balls for preventing bacteria from growing in the stagnant water, etc. are arranged. You may

In the water purifier cartridge 20 shown in FIGS. 1 and 2, the cap member 1 is attached to one end of the shaft member 21, and the cover member 23 is attached to the other end. A cap member 1 may be attached. In addition, in the water purifier cartridge 20 shown in FIGS. 1 and 2, the cap member 1 and the connecting member 24 are separate members, but the cap member 1 and the connecting member 24 may be molded integrally. That is, the cap member 1 may be formed so as to be connectable to the water purifier main body.

(water purifier)
The water purifier in which the water purifier cartridge is used is not particularly limited as long as it uses the water purifier cartridge. As a water purifier, for example, a faucet direct connection type that is directly attached to the tip of a water faucet; a stationary type that is connected to a faucet or a branch faucet provided on the faucet with a hose or pipe, etc. and installed near the faucet; a water purification cartridge on the faucet faucet integrated type (water faucet integrated type); and under sink type installed under the sink.

FIG. 3 shows an example of a water purifier. The water purifier 30 is a faucet-integrated water purifier in which the water purifier cartridge 20 is replaceably built in the faucet. The water purifier 30 has a separable head 31 and body 32 . The head 31 and the body 32 are separated, and the water purifier cartridge 20 is mounted inside the water purifier 30.例文帳に追加

(cap member)
The cap member 1 will be described in detail below. In the following, the cap member of the present invention will be described based on preferred embodiments, but the present invention is not limited to the following embodiments, and each embodiment can be applied without departing from the scope of the present invention. The shape, configuration, arrangement, etc. can be changed as appropriate.

(First embodiment)
Figures 4-9 show the cap member of the first embodiment. 4 is a plan view of the cap member of the first embodiment. FIG. 5 is a back view of the cap member shown in FIG. 4. FIG. 6 is a cross-sectional view taken along line AA in FIG. 4. FIG. 7 is a cross-sectional view taken along line BB in FIG. 4. FIG. 8 is a cross-sectional view taken along line CC of FIG. 4. FIG. 9 is a perspective view of the cap member shown in FIG. 4. FIG. 10 is a schematic cross-sectional view showing a state in which the shaft member is fixed to the cap member shown in FIG. 4 using an adhesive. FIG.

A cap member 1 of the first embodiment has a flat portion 2 and an insertion hole 3 provided in the flat portion 2 . The insertion hole 3 of the cap member 1 has a large-diameter portion 3a and a small-diameter portion 3b having an inner diameter smaller than that of the large-diameter portion, in order from the side where the shaft member 21 is inserted. In FIGS. 4 to 9, the planar portion 2 has an oval shape in plan view, but the planar portion 2 may have a circular or polygonal shape in plan view. Moreover, although the shape of the insertion hole 3 is circular in FIGS. 4 to 9, it may be elliptical or polygonal depending on the shape of the shaft member.

As shown in FIG. 10, the insertion hole 3 of the cap member 1 is composed of a large-diameter portion 3a and a small-diameter portion 3b. The gap with the shaft member 21 is large, and the gap with the shaft member 21 is small at the small diameter portion 3b. Therefore, when the cap member 1 is fixed to the shaft member 21 using an adhesive, the adhesive 40 can enter the large-diameter portion 3a, increasing the bonding area and improving the bonding strength. In addition, since the adhesive 40 is less likely to enter the small diameter portion 3 b , the adhesive 40 is prevented from flowing out through the insertion hole 3 to the downstream side surface and protruding into the cylinder of the shaft member 21 .

A positioning member 4 that contacts the outer peripheral surface of the shaft member 21 is provided on the inner peripheral surface of the large diameter portion 3a. Four positioning members 4 are provided for each insertion hole 3 . Further, the ratio of the portion where the positioning member 4 is provided to the inner circumference of the large diameter portion 3a is 35%.

The insertion hole 3 of the cap member 1 is provided with a tapered guiding surface 5 at the edge of the large diameter portion 3a. Similarly, the inner peripheral surface of the positioning member 4 is provided with a tapered guide surface 4a at the end on the upstream surface side.

Two abutment portions 6 with which the tip of the shaft member 21 abuts are provided on the side of the insertion hole 3 opposite to the side where the shaft member 21 is inserted. 4 to 9, the contact portion 6 is provided on the opposite side of the upstream side surface of the flat portion 2. For example, the inner diameter is larger than the outer diameter of the shaft member on the downstream side of the small diameter portion 3b of the insertion hole 3. A small portion may be provided, and this portion may be used as the contact portion.

The cap member 1 has a bank portion 7 formed on the peripheral edge portion of the upstream side surface. The outer periphery of the bank portion 7 is formed larger than the outer peripheral surface of the shaped adsorbent 22 formed on the outer peripheral surface of the shaft member 21 .

The cap member 1 has a wall portion 8 formed on the peripheral portion of the downstream side. The wall portion 8 is formed so as to be able to be joined with the joining member 24 . The wall portion 8 is formed according to the shape of the joint member 24, and can be omitted.

(Second embodiment)
A second embodiment of the cap member is shown in FIGS. 11-15. FIG. 11 is a plan view of the cap member of the second embodiment. 12 is a back view of the cap member shown in FIG. 11. FIG. 13 is a cross-sectional view taken along line AA of FIG. 11. FIG. 14 is a cross-sectional view taken along line BB in FIG. 11. FIG. 15 is a perspective view of the cap member shown in FIG. 11. FIG. 16 is a schematic cross-sectional view showing a state in which the shaft member is fitted into the cap member shown in FIG. 11. FIG. In addition, regarding the cap member of the second embodiment, the same reference numerals as those of the first embodiment are attached to the same parts as those of the first embodiment, and the description thereof is omitted.

In the cap member 1 of the second embodiment, a ridge 9 is formed around the insertion hole 3 on the surface (upstream side surface) of the flat portion 2 facing the shaped adsorbent. Further, in the cap member 1 of the second embodiment, a groove 10 is formed around the insertion hole 3 on the surface of the flat portion 2 facing the shaped adsorbent. As shown in FIG. 16 , by forming the ridges 9 , when the adhesive 40 spreads along the plane portion 2 , the ridges 9 dam it up. This prevents the adhesive 40 from excessively spreading along the flat portion 2 and protruding to the outer surface of the water purifier cartridge 20 even when the application amount of the adhesive 40 is increased.

The protrusion 9 is provided on the outer side of each insertion hole 3 in the flat portion 2 . Since there are two insertion holes 3 in FIG. This is because the adhesive between the insertion holes 3 spreads toward the inner side of the flat portion 2 and is less likely to protrude to the outer surface of the water purifier cartridge 20 . The ridges 9 may be formed at least partly around the insertion hole 3 , and the region where the ridges 9 are formed may be appropriately adjusted according to the shape of the cap member 1 .

The groove 10 is formed entirely around each insertion hole 3 . The groove 10 may be formed at least partly around each insertion hole 3 . The region in which the groove 10 is formed may be appropriately adjusted according to the shape of the cap member 1 .

The cap member of the present invention is suitable for a water purifier cartridge.

1: Cap member 2: Flat portion 3: Insertion hole 3a: Large diameter portion 3b: Small diameter portion 4: Positioning member 4a: Guide surface 5: Guide surface 6: Contact portion 7: Bank portion 8: Wall portion 9: Protruding line 10: Groove 20: Cartridge for water purifier 21: Shaft member 22: Molded adsorbent 23: Cover member 24: Joining member

Claims (6)

a cylindrical shaft member;
a shaped adsorbent formed on the outer peripheral surface of the shaft member;
A cap member used in a water purifier cartridge, having a flat portion that abuts on the shaped adsorbent, and a cap member having an insertion hole into which one end of the shaft member is inserted and communicated with the cylindrical hole of the shaft member. and
The insertion hole of the cap member has a large diameter portion and a small diameter portion having an inner diameter smaller than that of the large diameter portion in order from the surface side into which the shaft member is inserted,
A cap member, wherein the inner peripheral surface of the large-diameter portion is provided with a positioning member that abuts on the outer peripheral surface of the shaft member. A ratio (d1/d0) between the inner diameter (d1) of the large diameter portion and the outer diameter (d0) of the shaft member is 1.05 to 2, and
2. The cap member according to claim 1, wherein the ratio (d2/d0) of the inner diameter (d2) of said small diameter portion and the outer diameter (d0) of said shaft member is 1.002 to 1.05. 3. The cap member according to claim 1, wherein the surface of the planar portion facing the shaped adsorbent has a ridge formed around the insertion hole. 4. The cap member according to any one of claims 1 to 3, wherein the insertion hole of the cap member is provided with a tapered guiding surface at the edge of the large diameter portion. The cap member according to any one of claims 1 to 4, wherein three or more positioning members are provided in one insertion hole. a cylindrical shaft member;
a shaped adsorbent formed on the outer peripheral surface of the shaft member;
a cap member having a flat portion in contact with the shaped adsorbent, and an insertion hole into which one end of the shaft member is inserted and which communicates with the cylindrical hole of the shaft member;
a cover member that closes the cylindrical hole at the other end of the shaft member;
A water purifier cartridge, wherein the cap member is the cap member according to any one of claims 1 to 5.

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