JP7390843B2 - water purifier - Google Patents

Description

The present invention relates to a water purification cartridge having a filter medium for purifying raw water, and a water purifier having the water purification cartridge disposed inside and capable of receiving the raw water from the outside, passing through the filter medium, and discharging the filtered purified water to the outside. The present invention relates to a water purifier including a housing.

Conventionally, a water purifier that connects directly to a faucet has a water purification cartridge that has a filter medium that purifies raw water, and the water purification cartridge is installed inside and is capable of accepting raw water from the outside, passing through the filter medium, and discharging the purified water to the outside. A water purifier including a water purifier housing is known (see Patent Document 1).
The water purifier casing of the water purifier usually consists of a cylindrical casing body that has a wall portion and an opening at the other end, and a cylindrical casing body that has a wall portion and an opening at the other end so that the water purification cartridge installed inside the water purification cartridge can be replaced. The housing has a housing lid that closes the opening of the housing body, and a configuration is adopted in which the housing lid is fixed to the housing body by screwing or the like.
When using this water purifier, remove the casing lid from the casing main body, take out the used water purification cartridge from inside the casing main body, and then insert a new water purification cartridge inside the casing body. The replacement operation is performed by attaching the housing cover to the housing body.

Japanese Patent Application Publication No. 2018-123627

Like the water purifier described in Patent Document 1, the water purification cartridge is often not positioned and fixed to the water purifier casing inside the water purifier casing. In such cases, the water purification cartridge may be placed out of its proper position inside the water purifier housing, causing the flow of raw water to the filter media to be uneven, and there is a risk that appropriate purification performance may not be achieved. .
Furthermore, in the water purifier shown in FIG. 1 of Patent Document 1, the water purification cartridge is not fixed to the casing lid, so when the casing lid is removed from the casing main body, there is no water inside the casing main body. If the water purification cartridge remains and the water purification cartridge is disposed inside the casing body without sufficient clearance, there is a risk that the user may not be able to take out the water purification cartridge from the casing body. Furthermore, some users may not be able to visually recognize the water purification cartridge inside the casing body and may not be able to proceed with the replacement operation.

The present invention has been made in view of the above-mentioned problems, and its purpose is to securely fix a water purification cartridge inside a water purifier casing, and to ensure that raw water flows through a desired flow path when flowing raw water. In addition, it is an object of the present invention to provide a water purifier that can improve operability when replacing a water purification cartridge.

The water purifier to achieve the above purpose is
A water purification cartridge having a filter medium for purifying raw water, and a water purifier housing in which the water purification cartridge is disposed, and which can receive the raw water from the outside, pass through the filter medium, and discharge the purified water to the outside. The water purifier is equipped with the following characteristics:
The water purifier housing is composed of a cylindrical housing body having a wall at one end and an opening at the other end, and a housing lid that closes the opening of the housing body,
a first engagement position in which the housing body and the housing lid are engaged by a first relative rotation of the housing body with respect to the housing lid around a first axis of the water purifier housing; a first engagement mechanism capable of switching between a first engagement release position and a first engagement release position where the engagement is released;
A second relative rotation of the water purification cartridge with respect to the casing lid around a second axis along the first axis causes the water purification cartridge and the casing lid to be engaged to a second engagement position; a second engagement mechanism capable of switching between a second disengagement position and a second disengagement position;
The second relative rotation angle from the second engagement position to the second disengagement position in the second relative rotation is the same rotation direction as the second relative rotation. is set larger than a first relative rotation angle from the first engagement position to the first disengagement position,
The first axis and the second axis are coaxial .

According to the above characteristic structure, since the water purification cartridge can be relatively fixed to the housing lid by the second engagement mechanism, when the housing lid is attached to the housing main body by the first engagement mechanism, The water purification cartridge can be placed at a desired position inside the water purifier housing, and raw water can be uniformly passed through the filter medium as designed to exhibit appropriate purification performance.
Furthermore, the second relative rotation angle between the water purification cartridge and the casing lid due to the second engagement mechanism is the first relative rotation angle between the casing lid and the casing main body due to the first engagement mechanism. Since the casing body and the casing lid part are relatively rotated by the first relative rotation angle and the casing lid part is removed from the casing body, the casing of the water purification cartridge The engagement with the lid is maintained, and the water purification cartridge can be removed from the housing body together with the housing lid. As a result, the water purification cartridge can be replaced easily.

Further characteristic configurations of the water purifier according to the present invention include:
The casing body is in a state of being engaged with the casing lid by the first engagement mechanism with the opening facing toward the casing lid,
The casing main body has a first annular wall portion having the first axis as a central axis, and the casing lid has a second annular wall portion having the first axial center as the central axis; When engaged by the first engagement mechanism, the first annular wall portion and the second annular wall portion are arranged with their annular wall surfaces facing each other in a direction intersecting the first axis. ,
The first engagement mechanism includes a first notched groove portion formed in the annular wall surface of the first annular wall portion continuously from the opening side; a second recessed groove portion provided at the center and formed corresponding to the first relative rotation angle around the first axis; and a first groove portion protruding outward in a radial direction perpendicular to the first axis. a convex portion , and a second convex portion formed on the annular wall surface of the second annular wall portion so as to protrude from the annular wall surface;
The first notched groove portion and the second notched groove portion are formed as the annular wall surface of the first annular wall portion,
The first convex portion is a portion of the annular wall surface of the first annular wall portion where the second concave groove portion is formed in the circumferential direction around the first axis, and is further from the second concave groove portion. is also provided at a site on the side of the opening,
As the casing main body and the casing cover are brought relatively close to each other along the first axis, the second convex portion is fitted into the first recessed groove portion, and the second convex portion moves toward the first axis along the first axis. movable along the center, and is fitted into the second recessed groove portion with the first relative rotation about the first axis, and is brought into the first engagement release position and the first engagement. The point is that it is formed so that it can be moved between positions.

Further characteristic configurations of the water purifier according to the present invention include:
The water purification cartridge has a cartridge housing surrounding the filter medium,
The cartridge casing is brought into engagement with the casing lid by the second engagement mechanism with the purified water outlet for discharging purified water facing toward the casing lid;
The cartridge housing has a third annular wall having the second axis as the central axis, and the housing lid has a fourth annular wall having the second axis as the central axis. When engaged by the second engagement mechanism, the third annular wall portion and the fourth annular wall portion are arranged with their annular wall surfaces facing each other in a direction intersecting the second axis. ,
The second engagement mechanism includes a third notched groove portion formed in the annular wall surface of the third annular wall portion continuously from the purified water outlet side , and a third notched groove portion continuous to the third notched groove portion. a fourth concave notch portion formed as shown in FIG. 1 and corresponding to the second relative rotation angle around the second axis; 3 convex portions are provided, and a fourth convex portion formed to protrude from the annular wall surface is provided on the annular wall surface of the fourth annular wall portion,
The third notched groove portion and the fourth notched groove portion are formed as the annular wall surface of the third annular wall portion,
The third convex portion is located at a portion of the annular wall surface of the third annular wall portion where the fourth notched groove portion is formed in the circumferential direction around the second axis and is further away from the fourth notched groove portion. is also provided at a location on the side of the purified water outlet,
As the water purification cartridge and the housing cover are brought relatively close to each other along the second axis, the fourth convex portion is fitted into the third recessed groove portion, and the fourth convex portion moves toward the second axis. The second relative rotation about the second axis causes the second relative rotation to fit into the fourth recessed groove portion to the second disengagement position and the second engagement position. The point is that it is formed so that it can be moved between.

According to the above characteristic configuration, by appropriately setting the lengths around the axis of the second notched groove portion and the fourth notched groove portion, the first relative rotation angle and the second relative rotation angle can be set with high accuracy. Can be done.
As a result, the second relative rotation angle caused by the engagement between the water purification cartridge and the casing lid is made larger than the first relative rotation angle caused by the engagement between the casing body and the casing lid. In particular, it is possible to effectively prevent the water purification cartridge from remaining inside the housing body when the housing cover is removed from the housing body.

Further characteristic configurations of the water purifier according to the present invention include:
A cartridge housing surrounding the filter medium of the water purification cartridge is made of ABS resin.

Conventionally, when the cartridge housing of a water purification cartridge is fixed by being press-fitted into an annular flange formed inside the water purifier housing, polypropylene resin, which has relatively high mechanical strength, is used as the material. . Cartridge casings must be filled with filter media, so they are generally composed of a casing body and a lid, but the polypropylene resin used as the material for the cartridge casing can be used for ultrasonic welding. Since this is not possible, a configuration is often adopted in which a sealing member is interposed between the casing body and the lid and the two are connected by screwing or the like. That is, when polypropylene resin is used as the material for the cartridge housing, there is a disadvantage that a sealing member is required and the number of parts increases.
According to the characteristic structure described above, since the cartridge case is made of ABS resin, for example, the cartridge case is made up of two members, the cover body and the case body, and after the filter medium is sealed inside, the cover body and the case body are assembled. The main body can be ultrasonically welded, and the sealing member between the two can be omitted, reducing the number of parts and simplifying the configuration.
In addition, ABS resin generally has lower mechanical strength than polypropylene resin, and if the cartridge housing is press-fitted into the annular flange of the water purifier housing as described above, there is a risk of damage. However, according to the present invention, since the cartridge housing of the water purification cartridge and the housing lid of the water purifier housing are fixed by the second engagement mechanism without press fitting, the cartridge housing made of ABS resin is fixed. The possibility of injury to the body can be sufficiently reduced.

Further characteristic configurations of the water purifier according to the present invention include:
The first relative rotation angle is an angle of 40° or more and 45° or less, and the second relative rotation angle is an angle of 50° or more and 55° or less.

According to the above characteristic structure, the relative rotation is sufficiently small compared to the case where the fixing of the housing body and the housing lid part, and the fixing of the water purification cartridge and the housing lid part are realized by the generally known screw fixation. Since it is possible to fix the casing body and the casing lid part, and to fix the water purification cartridge and the casing lid part at an angle, it is possible to improve the operability of the user's operation of replacing the water purification cartridge.
In addition, the inventors believe that if the second relative rotation angle is at least 5 degrees or more larger than the first relative rotation angle in the relationship between the casing body, the casing lid, and the water purification cartridge, the effects described so far can be achieved. It has been experimentally confirmed that the

Further characteristic configurations of the water purifier according to the present invention include:
The first axis and the second axis are coaxial.

According to the characteristic structure described above, since the rotational operation associated with periodic replacement work of the water purification cartridge can be performed around a common rotation axis, the operability associated with replacement can be maintained at a high level.

It is a perspective view of a faucet direct connection type water purifier concerning an embodiment. FIG. 2 is a sectional view taken along line II-II in FIG. 1, and is a diagram showing a raw water discharge state in which raw water is discharged. FIG. 2 is a sectional view taken along line III-III in FIG. 1 and shows a purified water discharge state in which purified water is discharged. FIG. 2 is a perspective view of the water purifier with the casing body and the casing lid removed. FIG. 2 is a sectional view taken along the line VV in FIG. 1 and shows the first engagement mechanism in a first engagement position (solid line) and a first disengagement position (dashed line). FIG. 2 is a perspective view of the water purifier with the water purification cartridge and the housing lid removed. FIG. 2 is a sectional view taken along line VII-VII of FIG. 1, showing the second engagement mechanism in a second engagement position (solid line) and a second disengagement position (dashed line).

In the water purifier 100 according to the embodiment of the present invention, the water purification cartridge 20 is reliably fixed inside the water purifier housing 40, and the water purification cartridge 20 is reliably fixed to the inside of the water purifier housing 40, and the raw water is reliably passed through a desired flow path when raw water is flowing. This relates to something that can improve operability when replacing.
The water purifier 100 according to the embodiment will be described below based on FIGS. 1 to 7.

As shown in FIG. 1 or 2, the water purifier 100 according to the embodiment includes a water purification cartridge 20 having a filter medium R (for example, activated carbon) for purifying raw water, and a water purification cartridge 20 disposed inside the water purification cartridge 20, and a water purification cartridge 20 that purifies the raw water from the outside. and a water purifier housing 40 that can receive purified water that has passed through the filter medium R and discharged the purified water to the outside. The water purifier 100 according to this embodiment can switch between a purified water discharge state in which purified water is discharged as shown in FIG. 3 and a raw water discharge state in which raw water is discharged in a shower state as shown in FIG. It is configured to be switchable by operating the .

As shown in FIG. 2 or 3, the water purifier casing 40 includes a cylindrical casing main body 41 having a wall 43 at one end and an opening 41h (shown in FIG. 4) at the other end; and a housing lid part 51 that closes an opening 41h of the main body 41, and both are engaged by a first engagement mechanism K1, which will be described later, with a fourth seal member S4 interposed therebetween. ing.
An aperture 43a that penetrates the wall 43 and receives raw water from the outside is formed in the wall 43 of the casing body 41, and an annular opening 42 that stands up on the outside of the aperture 43a in plan view. It is provided.
The annular opening 42 has a male screw 42b cut on the outer circumferential surface of the annular wall thereof, and an adapter holding member 60 having a female screw 60a cut on the inner surface to be screwed into the male screw 42b can be screwed into the annular opening 42. It is configured.
A first filter F1 is fitted into the annular opening 42 so as to be sandwiched between a first ring-shaped member 61 and a second ring-shaped member 62, and the raw water passes through the first filter F1. After that, it flows into the water purifier housing 40 through the opening 43a.
With this configuration, the faucet-directly connected water purifier 100 according to the embodiment can connect the flange portion of the adapter (not shown) connectable to the faucet (not shown) to the adapter holding member 60 and the first ring-shaped member 61. It is connected to the raw water flow path (not shown) of the faucet by being sandwiched between the two.

In the case lid part 51, on the surface facing the opening 43a of the case body 41, a shower outlet hole 51a consisting of a large number of outlet holes and discharging raw water, and an insertion port 53 for discharging purified water are formed. There is.

The casing body 41 is composed of a plurality of parts, and inside the water purifier casing 40 formed by the casing body 41 and the casing lid part 51 being engaged by the first engagement mechanism K1, there are: A first space V1 that is directly connected to the opening 43a and a second space V2 that is connected to the first space V1 through a first communication hole H1 and a second communication hole H2 are formed.
A switching mechanism 30 is provided in the first space V1 to switch between a raw water discharge state (FIG. 2) in which raw water is guided to the first communication hole H1 and a purified water discharge state (FIG. 3) in which raw water is guided to the second communication hole H2. The second space V2 includes a region where the water purification cartridge 20 that purifies the raw water that has passed through the second communication hole H2 through an internal filter medium R is disposed, and a region where the water purification cartridge 20 that purifies the raw water that has passed through the first communication hole H1 is placed in the water purification cartridge. A raw water flow path L2 is formed that allows the water to flow outside of the shower head 20 and leads to the shower discharge hole 51a.

The switching mechanism 30 includes an operating lever 31 (shown in FIG. 1) that rotates 90 degrees around the operating axis P3, and an orthogonal cross-sectional view (FIGS. 2 and 3) that extends along the operating axis P3 and is orthogonal to the operating axis P3. The axial center member 35 has a U-shape in the cross-sectional view shown in FIG. 35, and a coil spring 32 that biases the support member 33 from the inside of the shaft member 35 toward the outside.
Note that a first sealing member S1 is provided between the first communication hole H1 and the spherical valve body 34 to seal between them, and a first seal member S1 is provided between the second communication hole H2 and the spherical valve body 34. A second seal member S2 is provided to seal between the two.

By employing the above configuration, the switching mechanism 30 allows the spherical valve body 34 to be positioned opposite the first communication hole H1 by rotating the operation lever 31 around the operation axis P3. H1 is closed and raw water is guided from the first space V1 to the second space V2 via the second communication hole H2 (the state shown in FIG. 3), and the spherical valve body 34 is inserted into the second communication hole H2. It is possible to switch between the purified water discharge state (the state shown in FIG. 2) in which the raw water is guided from the first space V1 to the second space V2 via the first communication hole H1 by placing the two facing each other and closing the second communication hole H2. becomes.

The water purification cartridge 20 includes a cartridge lid part 21 having a raw water intake port 21a that communicates with the second communication hole H2, a molded filter medium R, and one end of which is open so that it can be closed by the cartridge lid part 21, and the other end of which is open and closed. and a cartridge housing main body 22 having a purified water outlet 23. The raw water intake port 21a is watertightly connected to a communication hole forming portion H2a where the second communication hole H2 is formed via a third seal member S3.
That is, a cartridge housing 28 is formed from the cartridge lid portion 21 and the cartridge housing main body 22, and a molded filter medium R is disposed inside the cartridge housing 28.
The filter medium R is supported by a plurality of projecting supports 24 on the downstream side in the flow direction of raw water, and a second filter F2 is provided between the filter medium R and the projecting supports 24.
The water purification cartridge 20 and the housing lid 51 are fixed to each other in such a manner that the water purification outlet 23 of the water purification cartridge 20 and the insertion opening 53 of the housing lid 51 are engaged by a second engagement mechanism K2 described later. has been done.

In the water purifier 100 according to this embodiment, the water purifier housing 40 and the cartridge housing 28 are made of ABS resin for the purpose of improving economic efficiency. In particular, by constructing the cartridge housing 28 from ABS resin, the cartridge lid part 21 and the cartridge housing body 22 can be joined by ultrasonic welding, the sealing member between the two can be omitted, and the number of parts can be reduced. can.
Note that the water purifier housing 40 and the cartridge housing 28 can be manufactured using not only the above-mentioned materials but also various materials.

Now, in the water purifier 100 according to the embodiment, the water purification cartridge 20 is reliably fixed inside the water purifier housing 40, and the raw water is reliably passed through a desired flow path during raw water flow, and the water purification cartridge 20 It has the following configuration to improve operability when replacing.
In the water purifier 100, the casing body 41 and the casing lid 51 are engaged by the first relative rotation of the casing main body 41 with respect to the casing lid 51 around the first axis P1 of the water purifier casing 40. It includes a first engagement mechanism K1 that can switch between a first engagement position KG1 (illustrated in FIG. 5) and a first disengagement position KK1 (illustrated in FIG. 5) where the engagement is released. The second relative rotation of the water purification cartridge 20 with respect to the housing lid 51 around the second axis P2 along the axis P1 moves the water purification cartridge 20 and the housing lid 51 into a second engagement position KG2 (see FIG. 7) and a second engagement release position KK2 where the engagement is released.

In the water purifier 100, the second relative rotation angle (β in FIG. 7) from the second engagement position KG2 to the second disengagement position KK2 in the second relative rotation is the same rotation direction as the second relative rotation. The angle is set larger than the first relative rotation angle (α in FIG. 5) from the first engagement position KG1 to the first disengagement position KK1 in the first relative rotation direction.
Specifically, the first relative rotation angle α is preferably 40° or more and 45° or less, and the second relative rotation angle β is preferably 50° or more and 55° or less.
In addition, in the water purifier 100 according to the embodiment, the first axis P1 and the second axis P2 are configured coaxially.

An explanation will be added regarding the first engagement mechanism K1.
In this embodiment, the water purifier housing 40 has a substantially cylindrical outer shape with the first axis P1 as the central axis, as shown in FIG. The section 51 refers to the cylindrical peripheral wall extending in the direction along the first axis P1 of the water purifier housing 40, with the downstream end inward in the flow direction of raw water and purified water, and the housing lid section 51. The water purifier housing 40 is formed by stacking the cylindrical peripheral walls extending in the direction along the first axis P1, with the ends on the downstream side in the flow direction of raw water and purified water facing outward.
In other words, as shown in FIG. 4, the casing body 41 is provided with a first annular wall portion K1f as a cylindrical peripheral wall, and the casing lid portion 51 is provided with a second annular wall portion K1g as a cylindrical peripheral wall. , the first annular wall K1f and the second annular wall K1g are an annular wall surface of the first annular wall K1f (first annular wall surface K1ff) and an annular wall surface of the second annular wall K1g (second annular wall surface K1gf). are arranged to face each other in a direction intersecting the first axis P1. In the configuration shown in FIG. 4, the first annular wall surface K1ff is the outer peripheral surface, and the second annular wall surface K1gf is the inner peripheral surface.

As shown in FIGS. 4 and 5, a first engagement mechanism K1 is provided between a first annular wall surface K1ff and a second annular wall surface K1gf that face each other. Among these, the first annular wall surface K1ff is an outer peripheral wall surface of the housing body 41 that extends from the end of the housing body 41 on the opening 41h side in the direction along the first axis P1. The first annular wall surface K1ff includes a first convex portion K1h that protrudes outward from the first annular wall surface K1ff in a radial direction perpendicular to the first axis P1, a first concave groove portion K1b, and A second recessed groove portion K1c is provided continuously to the first recessed groove portion K1b and partitioned by the first convex portion K1h. The second concave groove portion K1c is formed corresponding to the first relative rotation angle (α in FIG. 5) with the first axis P1 as the rotation axis. Further, the second annular wall surface K1gf is provided with a second convex portion K1a that protrudes outward from the second annular wall surface K1gf in a radial direction perpendicular to the first axis P1.

As a result, the second convex portion K1a is fitted into the first concave groove portion K1b as the housing main body 41 and the housing lid portion 51 are brought relatively closer together along the first axis P1. , is movable along the first annular wall surface K1ff. Further, the second convex portion K1a comes into contact with the first convex portion K1h as a result of the first relative rotation about the first axis P1 as the rotation axis, and is fitted into the second concave groove portion K1c to form the first convex portion K1a. It is possible to move between the disengagement position KK1 and the first engagement position KG1.
That is, the width W2 along the circumferential direction of the second annular wall surface K1gf of the second convex portion K1a is smaller than the width W1 along the circumferential direction of the first annular wall surface K1ff of the second concave groove portion K1c.
In addition, an inclined portion is provided at the end of the second convex portion K1a in the first relative rotation direction to improve the smoothness of movement between the first concave groove portion K1b and the second concave groove portion K1c. ing.

Note that the second concave groove portion K1c is provided with a first protruding step portion K1d projecting from the first annular wall surface K1ff, and the second convex portion K1a is provided with a first retiring step portion K1e. , at the first engagement position KG1, the engaged state is maintained with the first protruding step portion K1d fitting into the first retiring step portion K1e.

That is, the first engagement mechanism K1 includes a second convex portion K1a, a first notched groove portion K1b, a second notched groove portion K1c, a first protruding step portion K1d, and a first retiring step portion K1e.

Note that four second convex portions K1a are provided at equal angular intervals (in the example shown in FIG. 5, at 90° intervals) in the circumferential direction of the second annular wall portion K1g, and the second convex portions K1a are provided at equal angular intervals (in the example shown in FIG. 5, at 90° intervals). Two second grooves K1c are provided at equal angular intervals (90° intervals in the example shown in FIG. 5) in the circumferential direction of the first annular wall K1f.

An explanation will be added regarding the second engagement mechanism K2.
As shown in FIG. 6, the cartridge housing 28 of the water purification cartridge 20 has a bottomed cylindrical shape, and has a second axis at one end surface facing the raw water inlet 21a (shown in FIG. 2) of the cartridge housing 28. It has a cylindrical peripheral wall formed to protrude outward along P2, and the inner peripheral surface of the cylindrical peripheral wall forms a purified water discharge port 23. The insertion port 53 of the casing lid 51 is inserted into the casing from one end surface where the shower discharge hole 51a is formed while the casing lid 51 forms the water purifier casing 40 together with the casing main body 41. Consists of a retracted projecting cylindrical peripheral wall.
Further, the purified water outlet 23 of the cartridge housing 28 and the insertion opening 53 of the housing lid 51 are in an engaged state when the cartridge housing 28 and the housing lid 51 are engaged by the second engagement mechanism K2. In some cases, as shown in FIGS. 2 and 3, when viewed in a direction perpendicular to the second axis P2, it overlaps with a part of the cylindrical peripheral wall extending in the direction along the second axis P2. In other words, the purified water outlet 23 of the cartridge housing 28 fits into the insertion opening 53 of the housing lid 51 .
In other words, as shown in FIG. 6, the cylindrical peripheral wall as the purified water outlet 23 of the cartridge housing 28 is provided as the third annular wall part K2f, and the cylindrical peripheral wall as the insertion opening 53 of the housing lid part 51 is provided as the fourth annular wall part K2f. The third annular wall K2f and the fourth annular wall K2g are provided as an annular wall K2g, and the annular wall surface (third annular wall surface K2ff) of the third annular wall K2f and the annular wall surface of the fourth annular wall K2g. (fourth annular wall surface K2gf) are arranged to face each other in a direction intersecting the second axis P2. In the configuration shown in FIG. 6, the third annular wall surface K2ff is the outer circumferential surface, and the fourth annular wall surface K2gf is the inner circumferential surface.

As shown in FIGS. 6 and 7, a second engagement mechanism K2 is provided between the third annular wall surface K2ff and the fourth annular wall surface K2gf that face each other. Among these, the third annular wall surface K2ff includes a third convex portion K2h that protrudes outward from the third annular wall surface K2ff in the radial direction perpendicular to the second axis P2, and a third concave groove portion K2b, A fourth recessed groove part K2c is provided continuously to the third recessed groove part K2b and partitioned by the third convex part K2h. The fourth notched groove portion K2c is formed corresponding to a second relative rotation angle (β in FIG. 7) with the second axis P2 as the rotation axis. Further, the fourth annular wall surface K2gf is provided with a fourth convex portion K2a that protrudes outward from the fourth annular wall surface K2gf in the radial direction perpendicular to the second axis P2.

As a result, as the water purification cartridge 20 and the housing lid part 51 are brought relatively closer together along the second axis P2, the fourth convex part K2a is fitted into the third concave groove part K2b. It is movable along the third annular wall surface K2ff. Further, the fourth convex portion K2a contacts the third convex portion K2h with the second relative rotation about the second axis P2 as the rotation axis, and is fitted into the fourth concave groove portion K2c, thereby forming the second It is possible to move between the disengagement position KK2 and the second engagement position KG2.
That is, the width W4 along the circumferential direction of the fourth annular wall surface K2gf of the fourth convex portion K2a is smaller than the width W3 along the circumferential direction of the third annular wall surface K2ff of the fourth recessed groove portion K2c.
In addition, an inclined portion is provided at the end of the fourth convex portion K2a in the second relative rotation direction to improve the smoothness of movement between the third concave groove portion K2b and the fourth concave groove portion K2c. ing.
Note that the fourth concave groove portion K2c is provided with a second protruding step portion K2d protruding from the third annular wall surface K2ff, and the fourth convex portion K2a is provided with a second retiring step portion K2e. , at the second engagement position KG2, the engaged state is maintained such that the second protruding step portion K2d fits into the second retiring step portion K2e.

That is, the second engagement mechanism K2 includes a fourth convex portion K2a, a third notched groove portion K2b, a fourth notched groove portion K2c, a second protruding step portion K2d, and a second recessed step portion K2e.

As shown in FIG. 7, two fourth convex portions K2a are provided at equal angular intervals (in the example shown in FIG. 7, at 180° intervals) in the circumferential direction of the fourth annular wall portion K2g. Two third notched grooves K2b and four fourth notched grooves K2c are provided at equal angular intervals (180° intervals in the example shown in FIG. 7) in the circumferential direction of the third annular wall K2f.

[Another embodiment]
In the following other embodiments, parts with reference numerals are intended to be functional parts having the same functions as those in the above embodiment.
(1) In the above embodiment, the water purifier 100 that is directly connected to a faucet has been described as an example.
However, the present invention can also be suitably applied as a stationary water purifier that is placed under a sink or the like in addition to a faucet.

(2) In the above embodiment, the first annular wall surface K1ff of the first annular wall portion K1f is the outer circumferential surface, and the second annular wall surface K1gf of the second annular wall portion K1g is the inner circumferential surface.
As another example of the configuration, the first annular wall surface K1ff may be the inner circumferential surface, and the second annular wall surface K1gf may be the outer circumferential surface.
In this case, the first annular wall surface K1ff, which is the inner peripheral surface, is provided with a first convex portion K1h, a first notched groove portion K1b, a second notched groove portion K1c, and a first protruding step portion K1d. On the other hand, the second annular wall surface K1gf, which is the outer peripheral surface, is provided with a second convex portion K1a and a first retiring step portion K1e.
Moreover, the first annular wall part K1f and the second annular wall part K1g may be provided separately from the cylindrical peripheral wall of the water purifier housing 40.

(3 ) The number of the second convex portion K1a, the first concave groove portion K1b, and the second concave groove portion K1c may be any number greater than or equal to one.

(4) In the above embodiment, the third annular wall surface K2ff of the third annular wall portion K2f is the outer circumferential surface, and the fourth annular wall surface K2gf of the fourth annular wall portion K2g is the inner circumferential surface.
As another configuration example, the third annular wall surface K2ff may be the inner circumferential surface, and the fourth annular wall surface K2gf may be the outer circumferential surface.
In this case, the third annular wall surface K2ff, which is the inner peripheral surface, is provided with a third convex portion K2h, a third notched groove portion K2b, a fourth notched groove portion K2c, and a second protruding step portion K2d. On the other hand, the fourth annular wall surface K2gf, which is the outer peripheral surface, is provided with a fourth convex portion K2a and a second retiring step portion K2e.

(5 ) The number of the fourth convex portion K2a, the third notched groove portion K2b, and the fourth notched groove portion K2c may be any number greater than or equal to one.

(6) The first engagement mechanism K1 and the second engagement mechanism K2 may be realized by screwing together.

It should be noted that the configuration disclosed in the above embodiment (including other embodiments, the same applies hereinafter) can be applied in combination with the configuration disclosed in other embodiments, as long as there is no contradiction, and The embodiments disclosed in this specification are illustrative, and the embodiments of the present invention are not limited thereto, and can be modified as appropriate without departing from the purpose of the present invention.

In the water purifier of the present invention, the water purification cartridge is securely fixed inside the water purifier housing, and the raw water is reliably passed through the desired flow path when flowing raw water, and the operability when replacing the water purification cartridge is improved. It can be effectively used as a water purifier.

20: Water purification cartridge 28: Cartridge housing 40: Water purifier housing 41: Housing body 51: Housing lid portion 100: Water purifier 20: Water purification cartridge K1: First engagement mechanism K2: Second engagement mechanism KG1: First engagement position KG2: Second engagement position KK1: First disengagement position KK2: Second disengagement position P1: First axis P2: Second axis R: Filter medium α: First relative rotation angle β: Second relative rotation angle K1: First engagement mechanism K1a: Second convex portion K1b: First concave groove portion K1c: Second concave groove portion K1f: First annular wall portion K1ff: First annular wall surface K1g: First 2nd annular wall part K1gf: 2nd annular wall surface K1h: 1st convex part K2: 2nd engagement mechanism K2a: 4th convex part K2b: 3rd concave notch part K2c: 4th concave notch part K2f: 3rd annular wall part K2ff: Third annular wall K2g: Fourth annular wall K2gf: Fourth annular wall K2h: Third convex part

Claims (5)

A water purification cartridge having a filter medium for purifying raw water, and a water purifier housing in which the water purification cartridge is disposed, and which can receive the raw water from the outside, pass through the filter medium, and discharge the purified water to the outside. A water purifier comprising:
The water purifier housing is composed of a cylindrical housing body having a wall at one end and an opening at the other end, and a housing lid that closes the opening of the housing body,
a first engagement position in which the housing body and the housing lid are engaged by a first relative rotation of the housing body with respect to the housing lid around a first axis of the water purifier housing; a first engagement mechanism capable of switching between a first engagement release position and a first engagement release position where the engagement is released;
A second relative rotation of the water purification cartridge with respect to the casing lid around a second axis along the first axis causes the water purification cartridge and the casing lid to be engaged to a second engagement position; a second engagement mechanism capable of switching between a second disengagement position and a second disengagement position;
The second relative rotation angle from the second engagement position to the second disengagement position in the second relative rotation is the same rotation direction as the second relative rotation. is set larger than a first relative rotation angle from the first engagement position to the first disengagement position,
A water purifier in which the first axis and the second axis are coaxial . The casing body is in a state of being engaged with the casing lid by the first engagement mechanism with the opening facing toward the casing lid,
The casing main body has a first annular wall portion having the first axis as a central axis, and the casing lid has a second annular wall portion having the first axial center as the central axis; When engaged by the first engagement mechanism, the first annular wall portion and the second annular wall portion are arranged with their annular wall surfaces facing each other in a direction intersecting the first axis. ,
The first engagement mechanism includes a first notched groove portion formed in the annular wall surface of the first annular wall portion continuously from the opening side; a second recessed groove portion provided at the center and formed corresponding to the first relative rotation angle around the first axis; and a first groove portion protruding outward in a radial direction perpendicular to the first axis. a convex portion , and a second convex portion formed on the annular wall surface of the second annular wall portion so as to protrude from the annular wall surface;
The first notched groove portion and the second notched groove portion are formed as the annular wall surface of the first annular wall portion,
The first convex portion is a portion of the annular wall surface of the first annular wall portion where the second concave groove portion is formed in the circumferential direction around the first axis, and is further from the second concave groove portion. is also provided at a site on the side of the opening,
As the casing main body and the casing cover are brought relatively close to each other along the first axis, the second convex portion is fitted into the first recessed groove portion, and the second convex portion moves toward the first axis along the first axis. movable along the center, and is fitted into the second recessed groove portion with the first relative rotation about the first axis, and is brought into the first engagement release position and the first engagement. The water purifier according to claim 1, which is configured to be movable between positions. The water purification cartridge has a cartridge housing surrounding the filter medium,
The cartridge casing is brought into engagement with the casing lid by the second engagement mechanism with the purified water outlet for discharging purified water facing toward the casing lid;
The cartridge housing has a third annular wall having the second axis as the central axis, and the housing lid has a fourth annular wall having the second axis as the central axis. When engaged by the second engagement mechanism, the third annular wall portion and the fourth annular wall portion are arranged with their annular wall surfaces facing each other in a direction intersecting the second axis. ,
The second engagement mechanism includes a third notched groove portion formed in the annular wall surface of the third annular wall portion continuously from the purified water outlet side , and a third notched groove portion continuous to the third notched groove portion. a fourth concave notch portion formed as shown in FIG. 1 and corresponding to the second relative rotation angle around the second axis; 3 convex portions are provided, and a fourth convex portion formed to protrude from the annular wall surface is provided on the annular wall surface of the fourth annular wall portion,
The third notched groove portion and the fourth notched groove portion are formed as the annular wall surface of the third annular wall portion,
The third convex portion is located at a portion of the annular wall surface of the third annular wall portion where the fourth notched groove portion is formed in the circumferential direction around the second axis and is further away from the fourth notched groove portion. is also provided at a location on the side of the purified water outlet,
As the water purification cartridge and the housing cover are brought relatively close to each other along the second axis, the fourth convex portion is fitted into the third recessed groove portion, and the fourth convex portion moves toward the second axis. The second relative rotation about the second axis causes the second relative rotation to fit into the fourth recessed groove portion to the second disengagement position and the second engagement position. The water purifier according to claim 1 or 2, which is configured to be movable between. The water purifier according to any one of claims 1 to 3, wherein a cartridge housing surrounding the filter medium of the water purification cartridge is made of ABS resin. The water purifier according to any one of claims 1 to 4, wherein the first relative rotation angle is an angle of 40° or more and 45° or less, and the second relative rotation angle is an angle of 50° or more and 55° or less. .

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