JP2015013254A - Liquid filter device, filter element and filter cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid filter device and the like capable of accurately transmitting information in communications between an IC tag placed in a filter element and a reader/writer placed in a filter case.SOLUTION: A filter case lid part 110 has an antenna 114 at the lower end part of a reader/writer module 113 projected inside and an engaging protrusion at a first tube part disposed at a center. A filter element 130 has an IC tag 136 at an upper plate 133 and an inclined surface inclined toward the lowest point of a second tube part disposed at the center of the upper plate 133. The engaging protrusion at the filter case lid part 110 is fixed at the lowest point of the inclined surface of the second tube part since the filter element 130 is pushed by a lower support 121 of a filter case body 120 and rotated when the filter case body 120 is pushed to the filter case lid part 110.

Description

  The present invention relates to a liquid filter device that holds a filter element in a filter case provided with a liquid inflow path and an outflow path, a filter element, and a filter cartridge that holds the filter element therein.

  2. Description of the Related Art Conventionally, vehicles and hydraulic construction machines are provided with a liquid filter device that collects foreign substances in various liquids such as fuel and hydraulic oil. In these liquid filter devices, it is necessary to replace auxiliary components such as an internal filter element or a filter cartridge with use time. Since the filter element or the filter cartridge has an optimum structure according to the liquid filter device, it is preferable that the replacement accessory is a genuine product whose performance has been compensated by the manufacturer of the liquid filter device.

  However, counterfeits are often used as these supplements, in which case the liquid filter device cannot exhibit sufficient performance, leading to a failure of equipment. Therefore, in order to eliminate the use of counterfeit products in liquid filter devices, etc., genuine products are equipped with passive IC (Integrated Circuit) tags and genuine products by communicating with the reader / writer installed in the filter case. It has been determined whether or not there is (for example, Patent Documents 1 and 2).

  In addition, there has been a liquid filter device or the like that can acquire a use history of a supplement by communication between an IC tag provided in the supplement and a reader / writer provided in the filter case, and can notify an appropriate replacement time based on the history (for example, Patent Document 3).

Japanese Patent No. 4399524 Special table 2007-537870 gazette JP 2012-241657 A

  In the case of the liquid filter device, when the liquid filter device is filled with liquid when in use and the distance between the IC tag and the reader / writer antenna is long, normal communication cannot be performed and There is a problem that it is difficult to obtain the usage history because the product cannot be identified.

  In order to solve this problem, the liquid filter device described in Patent Document 2 has a configuration in which the filter head and the ball (filter case) are coupled in a state where the positional relationship between the filter head and the filter cartridge is fixed by the key structure. It was.

  In recent liquid filter devices, the filter case body is coupled to the filter case lid in a state in which the filter element is held in a rotatable state within the filter case body for convenience during assembly or replacement of spare parts. Often a configuration is employed.

  In this case, the filter element rotates when the filter case lid and the filter case main body are coupled, and it is difficult to determine and fix the positional relationship between the IC tag and the reader / writer antenna with high accuracy.

  The present invention has been made in view of the above circumstances, and provides a liquid filter device and the like that can accurately transmit information in communication between an IC tag installed in a filter element and a reader / writer installed in a filter case. Objective.

In order to achieve the above object, a liquid filter device according to a first aspect of the present invention includes:
A filter case lid comprising a liquid inflow path, the liquid outflow path, and a lower opening that opens downward;
A filter element comprising: a substantially cylindrical filter medium part; a hollow disk-shaped upper plate provided above the filter medium part; and a disk-shaped lower plate provided below the filter medium part;
When the filter element is held inside, a liquid filter device comprising: a lower support portion that supports the lower plate; and a filter case body that includes an upper opening that opens upward,
An inner side of the filter case lid is provided with a locking projection for positioning and a reader / writer module that protrudes toward the lower opening, and an antenna is provided at the lower end of the reader / writer module. ,
The upper plate of the filter element is provided with a guide part that guides the locking projection of the filter case cover part while rotating to a single specific position, and an IC tag,
When the upper opening of the filter case main body is pressed against the lower opening of the filter case lid, the filter element held inside the filter case main body is pushed by the lower support portion of the filter case main body. By being pressed against the filter case lid, the guide portion of the filter element rotates with respect to the locking projection of the filter case lid, and is fixed when the locking projection comes to the specific position,
When the locking projection is fixed at the specific position, the antenna and the IC tag are close to each other,
It is characterized by that.

Moreover, the liquid filter device according to the second aspect of the present invention includes:
A filter case lid comprising a liquid inflow path and the liquid outflow path;
A filter element comprising: a substantially cylindrical filter medium part; a hollow disk-shaped upper plate provided above the filter medium part; and a disk-shaped lower plate provided below the filter medium part;
When the filter element is held inside, a spring portion that supports the center of the lower plate, an upper opening portion that opens upward, and the upper plate that holds the filter element inside and does not go outside. A liquid filter device comprising a filter case main body that forms a filter cartridge holding the filter element therein,
Below the filter case lid, a locking projection for positioning, and a reader / writer module installed to protrude downward, an antenna is provided at the lower end of the reader / writer module,
The upper plate of the filter element is provided with a guide part that guides the locking projection of the filter case cover part while rotating to a single specific position, and an IC tag,
When the upper opening of the filter case main body is pressed against the filter case lid, the filter element held inside the filter case main body is pressed by the spring portion of the filter case main body and the filter case cover By being pressed against the part, the guide part of the filter element rotates with respect to the locking protrusion of the filter case lid part, and is fixed when the locking protrusion comes to the specific position,
When the locking projection is fixed at the specific position, the antenna and the IC tag are close to each other,
It is characterized by that.

In the liquid filter device according to the first or second aspect, either the inflow path or the outflow path of the filter case lid portion includes the filter case main body and the filter case lid that hold the filter element therein. A first tube part inserted into a hollow disk-shaped hollow part of the upper plate of the filter element when the parts are joined;
The locking protrusion is provided so as to protrude to the outside of the first pipe portion,
The upper plate of the filter element includes a second pipe portion connected to the inner periphery of the hollow disk shape,
The guide portion includes an inclined surface that is provided on the inner side of the second pipe portion and is inclined toward the specific position.
The locking protrusion may move while sliding on the inclined surface toward the specific position, and may be fixed when the locking protrusion reaches the specific position.

  Further, the lower end portion of the locking projection may have a shape that is pointed downward, and the opposite side of the inclined surface to the specific position may have a shape that is pointed upward.

Moreover, the liquid filter device according to the third aspect of the present invention provides:
A filter case lid comprising a liquid inflow path, the liquid outflow path, and a lower opening that opens downward;
A filter element comprising: a substantially cylindrical filter medium part; a hollow disk-shaped upper plate provided above the filter medium part; and a disk-shaped lower plate provided below the filter medium part;
When the filter element is held inside, a liquid filter device comprising: a lower support portion that supports the lower plate; and a filter case body that includes an upper opening that opens upward,
The upper plate of the filter element is provided with a locking projection provided on the inner periphery of the hollow disk shape and an IC tag,
Inside the filter case lid portion, a guide portion that guides the locking projection of the filter element while rotating to a single specific position, and a reader / writer module that protrudes toward the lower opening portion side are provided. An antenna is provided at the lower end of the reader / writer module,
When the upper opening of the filter case body is pressed against the lower opening of the filter case lid, the filter element held inside the filter case body is pressed against the lower support part of the filter case body. By being pressed against the filter case lid, the locking projection of the filter element rotates with respect to the guide portion of the filter case lid, and is fixed when the locking projection reaches the specific position. And
When the locking projection is fixed at the specific position, the antenna and the IC tag are close to each other,
It is characterized by that.

Moreover, the liquid filter device according to the fourth aspect of the present invention includes:
A filter case lid comprising a liquid inflow path and the liquid outflow path;
A filter element comprising: a substantially cylindrical filter medium part; a hollow disk-shaped upper plate provided above the filter medium part; and a disk-shaped lower plate provided below the filter medium part;
When the filter element is held inside, a spring portion that supports the center of the lower plate, an upper opening portion that opens upward, and the upper plate that holds the filter element inside and does not go outside. A liquid filter device comprising a filter case main body that forms a filter cartridge holding the filter element therein,
The upper plate of the filter element is provided with a locking projection provided on the inner periphery of the hollow disk shape and an IC tag,
Below the filter case lid, a guide part that guides the locking projection of the filter element while rotating to a single specific position, and a reader / writer module that protrudes downward is provided, An antenna is provided at the lower end of the reader / writer module,
When the upper opening of the filter case main body is pressed against the filter case lid, the filter element held inside the filter case main body is pressed by the spring portion of the filter case main body and the filter case cover By being pressed against the portion, the locking projection of the filter element rotates with respect to the guide portion of the filter case lid, and is fixed when the locking projection reaches the specific position,
When the locking projection is fixed at the specific position, the antenna and the IC tag are close to each other,
It is characterized by that.

The liquid filter device according to the third or fourth aspect is
Either the inflow path or the outflow path of the filter case lid portion is formed by connecting the filter case main body holding the filter element and the filter case lid portion to the upper plate of the filter element. A first tube portion to be inserted into the hollow disc-shaped hollow portion;
The guide portion includes an inclined surface that is provided outside the first pipe portion and is inclined toward the specific position.
The upper plate of the filter element includes a second pipe portion continuous with the hollow disk-shaped inner periphery,
The locking projection is provided so as to protrude to the inside of the second pipe portion,
The locking protrusion may move while sliding toward the specific position, and may be fixed when the locking protrusion reaches the specific position.

  Further, the upper end of the locking projection may have a shape that is pointed upward, and the opposite side to the specific position of the inclined surface may have a shape that is pointed downward.

The liquid filter device according to the first or third aspect is
The filter element may further include a protrusion provided on the bottom surface of the lower plate so as to protrude downward, and the protrusion may be brought into contact with a lower support portion of the filter case main body.

The liquid filter device according to the first to fourth aspects includes:
The upper plate of the filter element may be made of resin, and the IC tag may be embedded in the resin.

A filter element according to the fifth aspect of the present invention is:
A liquid filter device having a liquid inflow path, a liquid outflow path, a filter case lid having a lower opening that opens downward, and a filter case body having an upper opening that opens upward A filter element provided,
A substantially cylindrical filter medium part, a hollow disk-shaped upper plate provided on the upper side of the filter medium part, and a disk-shaped lower plate provided on the lower side of the filter medium part,
An inner side of the filter case lid is provided with a locking projection for positioning and a reader / writer module that protrudes toward the lower opening, and an antenna is provided at the lower end of the reader / writer module. ,
The upper plate is provided with a guide portion that guides the locking projection of the filter case lid portion while rotating to a single specific position, and an IC tag,
A lower support portion provided at the bottom of the filter case body with the filter element held inside the filter case body when the upper opening of the filter case body is pressed against the lower opening of the filter case lid The guide part of the filter element rotates with respect to the locking protrusion of the filter case cover part, and the locking protrusion comes to the specific position. By the way, fixed
When the locking projection is fixed at the specific position, the antenna and the IC tag are close to each other,
It is characterized by that.

A filter cartridge according to the sixth aspect of the present invention is
A filter cartridge that is coupled to a filter case lid portion that includes a liquid inflow path and a liquid outflow path to form a liquid filter device,
A filter element having a substantially cylindrical filter medium part, a hollow disk-shaped upper plate provided on the upper side of the filter medium part, and a disk-shaped lower plate provided on the lower side of the filter medium part;
When the filter element is held inside, a spring portion that supports the center of the lower plate, an upper opening portion that opens upward, and the upper plate that holds the filter element inside and does not go outside. A filter case main body having a deterring part for deterring,
Below the filter case lid, a locking projection for positioning, and a reader / writer module installed to protrude downward, an antenna is provided at the lower end of the reader / writer module,
The upper plate of the filter element is provided with a guide part that guides the locking projection of the filter case cover part while rotating to a single specific position, and an IC tag,
When the upper opening of the filter case main body is pressed against the filter case lid, the filter element held inside the filter case main body is pressed by the spring portion of the filter case main body and the filter case cover By being pressed against the part, the guide part of the filter element rotates with respect to the locking protrusion of the filter case lid part, and is fixed when the locking protrusion comes to the specific position,
When the locking projection is fixed at the specific position, the antenna and the IC tag are close to each other,
It is characterized by that.

A filter element according to the seventh aspect of the present invention is
A liquid filter device having a liquid inflow path, a liquid outflow path, a filter case lid having a lower opening that opens downward, and a filter case body having an upper opening that opens upward A filter element provided,
A substantially cylindrical filter medium part, a hollow disk-shaped upper plate provided on the upper side of the filter medium part, and a disk-shaped lower plate provided on the lower side of the filter medium part,
The upper plate is provided with a locking projection for positioning provided on the inner periphery of the hollow disk shape, and an IC tag,
Inside the filter case lid, a guide part that guides the locking projection of the filter element while rotating to a single specific position, and a reader / writer module that protrudes toward the lower opening part side are provided. An antenna is provided at the lower end of the reader / writer module,
When the upper opening of the filter case body is pressed against the lower opening of the filter case lid, the lower support is provided in which the filter element held inside the filter case body is provided at the bottom of the filter case body. The locking projection of the filter element rotates with respect to the guide portion of the filter case lid, and the locking projection comes to the specific position. Fixed in place,
When the locking projection is fixed at the specific position, the antenna and the IC tag are close to each other,
It is characterized by that.

The filter cartridge according to the eighth aspect of the present invention is
A filter cartridge that is coupled to a filter case lid portion that includes a liquid inflow path and a liquid outflow path to form a liquid filter device,
A filter element comprising: a substantially cylindrical filter medium part; a hollow disk-like upper plate provided above the filter medium part; and a disk-like lower plate provided below the filter medium part;
When the filter element is held inside, a spring portion that supports the center of the lower plate, an upper opening portion that opens upward, and the upper plate that holds the filter element inside and does not go outside. A filter case main body having a deterring part for deterring,
The upper plate of the filter element is provided with a locking projection provided on the inner periphery of the hollow disk shape and an IC tag,
Below the filter case lid, a guide part that guides the locking projection of the filter element while rotating to a single specific position, and a reader / writer module that protrudes downward is provided, An antenna is provided at the lower end of the reader / writer module,
When the upper opening of the filter case main body is pressed against the filter case lid, the filter element held inside the filter case main body is pressed by the spring portion of the filter case main body and the filter case cover By being pressed against the portion, the locking projection of the filter element rotates with respect to the guide portion of the filter case lid, and is fixed when the locking projection reaches the specific position,
When the locking projection is fixed at the specific position, the antenna and the IC tag are close to each other,
It is characterized by that.

  According to the present invention, it is possible to accurately transmit information in communication between an IC tag installed in a filter element and a reader / writer installed in a filter case.

1 is an external view of a liquid filter device according to Embodiment 1. FIG. (A) It is a top view of a liquid filter apparatus. (B) It is sectional drawing of a liquid filter apparatus. (A) It is sectional drawing of a filter case cover part. (B) It is sectional drawing of a filter element. (C) It is sectional drawing of a filter case main body. It is a perspective view of a filter case cover part and a filter element. It is a figure explaining the shape of a latching protrusion. (A) is sectional drawing, (b) is a bottom view, (c) is a side view. It is a figure explaining the shape of an upper plate. (A) is a top view, (b), (c), and (d) are side views, (e) is a bottom view, and (f) is a perspective view. (A) It is an expanded view of a 2nd pipe part. (B) It is the figure which showed a mode that the latching protrusion was fixed to the specific position. FIG. 6 is a perspective view of a filter case lid portion and a filter element of a liquid filter device according to Embodiment 2. (A) It is an expanded view of a 1st pipe part. (B) It is the figure which showed a mode that the latching protrusion was fixed to the specific position. 6 is an external view of a liquid filter device according to Embodiment 3. FIG. (A) It is a top view of a liquid filter apparatus. (B) It is sectional drawing of a liquid filter apparatus. (A) It is sectional drawing of a filter case cover part. (B) It is sectional drawing of a filter cartridge. It is a perspective view of a filter case cover part and a filter cartridge. It is a perspective view of a filter case cover part and a filter cartridge.

(Embodiment 1)
Embodiment 1 of the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the liquid filter device 1 according to the present embodiment has a filter case lid portion 110 having a downward opening portion directed downward, and an upper opening portion directed upward, and the filter case lid portion 110 includes On the other hand, a filter case 100 comprising a filter case main body 120 sealed with screws is provided.

  As shown in FIG. 2, a filter element 130 that collects foreign matters in the liquid by passing the liquid is held inside the filter case 100. Here, FIG. 2A is a top view of the liquid filter device 1, and FIG. 2B is a cross-sectional view seen from the arrow a-a 'in FIGS. 1 and 2A. In FIG. 2 (b), in order to help understanding of the internal configuration of the liquid filter device 1, portions other than the cross-section shown by hatching are also shown in a perspective manner.

  During operation of the liquid filter device 1, the liquid that has flowed in from the inflow path 111 of the filter case lid 110 flows into the outside of the filter element 130. The liquid accumulated outside the filter element 130 passes through the filter medium part 132 of the filter element 130, thereby removing foreign substances and flowing into the filter medium part 132, and flows out from the outflow path 112 of the filter case lid part 110. .

  FIG. 3 shows the constituent parts of the filter case lid part 110, the filter case main body 120, and the filter element 130. As in FIG. 2B, the parts other than the cross-section shown by the oblique lines are also shown in a perspective manner. ing. Each component will be described with reference to FIGS.

  The filter case lid 110 is made of a metal such as aluminum, for example, and includes an inflow path 111 for guiding the liquid into the filter case 100, an outflow path 112 for guiding the liquid that has passed through the filter element 130 to the outside, and the filter case The reader / writer module 113 is installed so as to protrude into the lid 110. A reader / writer antenna 114 is provided near the lower end of the reader / writer module 113. The antenna 114 may be mounted inside the reader / writer module 113 or may be mounted on the surface and covered with a resin.

  The reader / writer module 113 is composed of a member that penetrates the filter case lid 110 and may be removable. In that case, the filter 115 is fixed to the outer wall surface of the filter case lid 110 with a screw 115. A signal line 116 extends from the reader / writer module 113 and is connected to a control unit such as a vehicle in which the liquid filter device 1 is installed. Data signals are transmitted and received between the reader / writer module 113 and the control unit via the signal line 116.

  Further, the filter case lid portion 110 is provided with a groove for a female screw 117 on the inner surface near the opening.

  The filter case body 120 is made of, for example, a synthetic resin. A lower support portion 121 for supporting the bottom surface of the filter element 130 is provided inside the bottom surface. Three or more lower support parts 121 are provided radially. Further, convex bodies 122 are provided on the outer surface of the filter case main body 120 in the vertical direction at regular intervals. This functions as an anti-slip hand for gripping when the filter case body 120 is rotated to be screwed to the filter case lid 110.

  In addition, a groove of the male screw 123 is provided on the outer surface near the opening of the filter case main body 120. By fitting the male screw 123 of the filter case main body 120 and the female screw 117 of the filter case lid portion 110 and rotating the filter case main body 120 with respect to the filter case lid portion 110 and tightening the screws, the filter case 100 is fixed. It can be sealed.

  The filter element 130 includes a cylindrical grid-shaped filter medium support part 131, a substantially cylindrical filter medium part 132 provided on the outer periphery of the filter medium support part 131, and a hollow disk-shaped upper plate 133 provided above the filter medium part 132. And a disc-shaped lower plate 134 provided on the lower side of the filter medium part 132. The detailed shape of the filter medium part 132 is, for example, a cross-shaped chrysanthemum shape in which the filter medium is folded in a bellows shape and wound into a cylindrical shape.

  The upper plate 133 is made of resin, and an IC (Integrated Circuit) tag 136 is embedded therein. For example, resin molding is performed using a mold that supports the IC tag 136. The IC tag 136 is an electronic component in which a rewritable nonvolatile memory, a transmission / reception circuit, and a transmission / reception antenna are integrated, and transmits / receives data to / from the reader / writer module 113. The IC tag 136 does not have a power source, generates a very small amount of power from radio waves received from the reader / writer module 113, and performs information processing and data transmission / reception using the power.

  Data to be transmitted and received between the reader / writer module 113 and the IC tag 136 may be arbitrary data. For example, a code indicating that the filter element 130 is a genuine product, a lot number, and the like are stored in the memory of the IC tag 136, and an instruction for returning such information is transmitted from the reader / writer module 113. At this time, the requested information is returned from the IC tag 136. Then, the control unit that obtains a signal from the reader / writer module 113 determines whether or not the provided filter element 130 is a genuine product. If the filter element 130 is not a genuine product, it issues a warning or outputs from a vehicle engine or the like. It is controlled so that it cannot be operated. Note that information stored in the IC tag 136 provided in the filter element 130 can be read by an arbitrary terminal such as a mobile phone having an IC tag reader / writer function.

  Here, when the liquid filter device 1 is assembled and the filter function is operated, the filter case 100 is filled with a liquid such as oil or water. When a liquid is inserted between the antenna 114 and the IC tag 136, propagation of radio waves is deteriorated, so that communication cannot be performed normally unless the distance is sufficiently short. Therefore, the distance between the antenna 114 provided in the filter case lid 110 and the IC tag 136 provided in the filter element 130 needs to be as short as possible. For example, the distance between the two is desirably 5 mm or less.

  The antenna 114 is provided inside the filter case lid 110, that is, at the tip of the reader / writer module 113 protruding toward the filter element 130 side. Therefore, the antenna 114 can be brought close to the IC tag 136 in a direction parallel to the central axis of the filter element 130. On the other hand, regarding the rotation direction about the central axis of the filter element 130, it is necessary to consider the operation during assembly.

  When assembling the liquid filter device 1, first, the filter element 130 is inserted into the filter case main body 120, and then the male screw 123 of the filter case main body 120 and the female screw 117 of the filter case lid 110 are fitted. Then, the filter case main body 120 is rotated with respect to the filter case lid portion 110 and the screw is tightened.

  Here, when the filter element 130 is not limited in the movement in the rotational direction with respect to the filter case, the position of the IC tag 136 is also rotationally moved along with the rotational movement of the filter element 130. Therefore, in order to make the antenna 114 of the filter case cover 110 close to the IC tag 136 of the filter element 130, it is necessary to fix the position of the filter element 130 in the rotation direction with respect to the filter case cover 110.

  The positional alignment of the filter case cover part 110 and the filter element 130 in the rotation direction will be described in detail with reference to FIGS.

  As shown in FIGS. 4 and 5, the filter case lid part 110 further includes a hollow cylindrical first pipe part 118 that is continuous with the outflow path 112. A locking projection 1181 parallel to the central axis direction of the first tube portion 118 is formed on the side surface of the first tube portion 118. As shown in FIG. 5, the locking projection 1181 has a shape in which a lower end 1182 of a rectangular parallelepiped having a longitudinal direction parallel to the central axis direction of the first pipe portion 118 is pointed.

As shown in FIG. 6, the upper plate 133 of the filter element 130 further includes a second pipe portion 137 connected to the hollow disk-shaped inner periphery of the upper plate 133. Here, since the first tube portion 118 of the filter case lid portion 110 is inserted into the second tube portion 137 of the filter element 130, the innermost inner diameter r _E of the second tube portion 137 is the first tube portion 118. slightly larger than the outer diameter r _C of. A seal member 1373 that prevents liquid leakage is provided at the entrance of the second pipe portion 137.

  The 2nd pipe part 137 has the lowest point 1372 in the position most distant from the surface 1331 of the upper plate, and the inclined surface 1371 which inclines toward the bottom from right and left toward it. The upper end of the inclined surface 1371, that is, the side opposite to the lowest point 1372 is pointed upward. FIGS. 7A and 7B are views in which the inner wall surface of the first pipe portion 118 is developed. As shown in FIG. 7A, the lowermost point 1372 of the inclined surface 1371 has a cut. Yes.

  An operation at the time of assembling the liquid filter device 1 configured as described above will be described.

  First, after inserting the filter element 130 into the filter case main body 120, the opening of the filter case main body 120 is pressed against the opening of the filter case lid 110. As a result, the filter element 130 having the lower plate 134 pressed against the lower support portion 121 of the filter case main body 120 is pressed against the filter case lid portion 110.

  When the filter element 130 is pressed against the filter case lid 110, the inclined surface 1371 of the second pipe portion 137 of the filter element 130 is pressed against the locking protrusion 1181 of the filter case lid 110. Due to the pressing force, the inclined surface 1371 slides and rotates with respect to the locking projection 1181, so that the filter element 130 rotates with respect to the filter case lid 110. The rotation angle here is 180 degrees at the maximum.

  When this operation is considered with reference to the filter element 130, the locking projection 1181 of the filter case lid 110 moves along the inclined surface 1371 of the filter element 130 as shown in FIG. When the locking projection 1181 reaches the lowest point 1372, the positional relationship between the filter case lid 110 and the filter element 130 is fixed. That is, the lowest point 1372 of the second pipe portion 137 is a predetermined specific position.

  When the positional relationship between the filter case cover 110 and the filter element 130 is fixed, the antenna 114 of the filter case cover 110 and the IC tag 136 of the filter element 130 are closest to each other. In other words, the positions of the locking projection 1181 and the lowest point 1372 are determined in advance in consideration of the positional relationship between the antenna 114 and the IC tag 136.

  Thus, after the positional relationship between the filter element 130 and the filter case lid 110 is fixed, the male screw 123 of the filter case main body 120 and the female screw 117 of the filter case lid 110 are fitted, and the filter case main body 120 is fitted. Is rotated with respect to the filter case lid portion 110, and the screw is tightened for sealing.

  Here, while the filter case main body 120 rotates for screw tightening, the filter element 130 stops rotating, and therefore, between the lower plate 134 of the filter element 130 and the lower support portion 121 of the filter case main body 120. Friction will occur. In order to reduce this friction, as shown in FIG. 3B, protrusions 1341 may be provided on the surface of the lower plate along the circumference so that only the protrusions 1341 are in contact with the lower support portion 121. good. Thereby, even if the filter element 130 is fixed, the filter case main body 120 can be smoothly rotated.

  As described above, in the present embodiment, the filter case lid portion 110 includes the antenna 114 near the lower end of the reader / writer module 113 projecting inward, and the first tube portion 118 located in the center has a locking projection. The filter element 130 includes an IC tag 136 on the upper plate 133, and an inclined surface 1371 that is inclined toward the lowest point 1372 in the second pipe portion 137 located in the center of the upper plate 133. . When the filter case main body 120 is pressed against the filter case lid 110, the filter element 130 is pressed by the lower support portion 121 of the filter case main body 120 and pressed against the filter case lid 110. The filter element 130 is rotated with respect to the filter case lid 110, and the locking projection 1181 of the filter case lid 110 is fixed at the lowest point 1372 of the second pipe portion 137 of the filter element 130.

  As a result, the filter element 130 is fixed at a predetermined position with respect to the filter case lid 110, and the IC tag 136 of the filter element 130 and the antenna 114 of the filter case lid 110 can be brought close to each other. Communication between the tag 136 and the reader / writer module 113 can be normally performed.

(Embodiment 2)
A second embodiment of the present invention will be described in detail with reference to the drawings.

  Similarly to the first embodiment, the liquid filter device 2 according to the present embodiment has a filter case lid portion 210 having a lower opening portion that is directed downward, and an upper opening portion that is directed upward, and the filter case lid portion 210. A filter case body 120 that is sealed with screws, a filter case lid portion 210, and a filter element 230 that is held inside the filter case body 120. The configuration of the filter case main body 120 is the same as that of the first embodiment.

  The filter case lid 210 includes an inflow path 111, an outflow path 112, a reader / writer module 113, an antenna 114, a screw 115, a signal line 116, a female screw 117, and a first tube similar to those in the first embodiment. Part 118. However, as shown in FIG. 8, in the present embodiment, the first pipe portion 118 is provided with an inclined surface 2191 instead of the locking projection 1181. FIGS. 9A and 9B are views in which the outer wall surface of the first pipe portion 218 is developed. As shown in FIG. 9 (a), the inclined surface 2191 has a notch at the uppermost point 2192 farthest from the opening of the filter case lid 210, and the inclined surface 2191 is directed upward from the left and right toward the uppermost point 2192. It is inclined toward. The lower end of the inclined surface 2191, that is, the side opposite to the uppermost point 2192 is pointed downward.

  The filter element 230 includes a filter medium support part 131, a filter medium part 132, an upper plate 233, and a lower plate 134 similar to those in the first embodiment. However, in the present embodiment, the second pipe portion 237 of the upper plate 233 has a configuration in which the locking projection 2371 is provided on the inner wall instead of the inclined surface. The locking projection 2371 has a substantially triangular prism shape that is pointed in the direction toward the filter case lid 210.

  When assembling the liquid filter device 2, the filter element 230 is inserted into the filter case body 120, and then the opening of the filter case body 120 is pressed against the opening of the filter case lid 210. Accordingly, the filter element 230 having the lower plate 134 pressed against the lower support portion 121 of the filter case main body 120 is pressed against the filter case lid portion 210.

  When the filter element 230 is pressed against the filter case lid 210, the locking protrusion 2371 of the second pipe portion 237 of the filter element 230 is pressed against the inclined surface 2191 of the filter case lid 210. Due to the pressing force, the locking protrusion 2371 slides and rotates with respect to the inclined surface 2191, so that the filter element 230 rotates with respect to the filter case lid portion 210. The rotation angle here is 180 degrees at the maximum.

  That is, as shown in FIG. 9B, the locking projection 2371 of the second tube portion 237 of the filter element 230 moves along the inclined surface 2191 of the first tube portion 118 of the filter case lid portion 210, When the projection 2371 comes to the uppermost point 2192, the positional relationship between the filter case lid 210 and the filter element 230 is fixed. That is, the uppermost point 2192 of the first pipe part 118 is a predetermined specific position.

  When the positional relationship between the filter case cover 210 and the filter element 230 is fixed, the antenna 114 of the filter case cover 210 and the IC tag 136 of the filter element 230 are closest to each other. In other words, the positions of the locking protrusion 2371 and the uppermost point 2192 are determined in advance in consideration of the positional relationship between the antenna 114 and the IC tag 136.

  Here, as in the first embodiment, in order to reduce the friction between the lower plate 134 of the filter element 230 and the lower support part 121 of the filter case main body 120, the protrusions 1341 are arranged on the surface of the lower plate 134. You may provide along.

  Thus, after the positional relationship between the filter element 230 and the filter case lid portion 210 is fixed, the male screw 123 of the filter case main body 120 and the female screw 117 of the filter case lid portion 210 are fitted, and the filter case main body 120 is fitted. Is rotated with respect to the filter case lid portion 210 and tightened with a screw to be sealed.

  As described above, in the present embodiment, the inclined surface 2191 directed to the uppermost point 2192 is provided on the outer wall surface of the first pipe portion 118 located in the center of the filter case lid portion 210, and the upper plate 233 of the filter element 230. A locking projection 2371 is provided on the inner wall surface of the second tube portion 237 located at the center of the filter portion, and the filter case body 120 is pressed against the filter case lid portion 210, whereby the filter element 230 is pressed against the filter case lid portion 210. The locking projection 2371 of the filter element 230 is fixed at the uppermost point 2192 of the first pipe portion 118 of the filter case lid portion 210.

  As a result, the filter element 230 is fixed at a predetermined position with respect to the filter case lid 210, and the IC tag 136 of the filter element 230 and the antenna 114 of the filter case lid 210 can be brought close to each other. Communication between the tag 136 and the reader / writer module 113 can be normally performed.

(Embodiment 3)
Embodiment 3 of the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 10, the liquid filter device 3 according to the present embodiment includes a filter case lid 310 and a filter case main body 320 that is sealed to the filter case lid 310 with screws.

  As shown in FIG. 11, a filter element 330 that collects foreign matter in the liquid by passing the liquid is held inside the filter case main body 320. As shown in FIG. 12, the filter case main body 320 and the filter element 330 are integrated to form a filter cartridge 300. Here, FIG. 11A is a top view of the liquid filter device 1, and FIG. 11B is a cross-sectional view seen from the arrow b-b ′ in FIGS. 10 and 11A. In FIG. 11 (b), in order to help understanding of the internal configuration of the liquid filter device 1, portions other than the cross-section shown by hatching are also shown in a perspective manner.

  FIG. 12 shows the constituent parts of the filter case cover 310 and the filter cartridge 300, and also shows portions other than the cross-section shown by hatching in a perspective manner as in FIG. 11B. Each component will be described with reference to FIGS.

  The filter case lid 310 is made of, for example, a metal such as aluminum, and has an inflow path 311 for guiding liquid into the filter device 3, an outflow path 312 for guiding liquid that has passed through the filter element 330 to the outside, and a filter case A reader / writer module 313 is provided so as to protrude below the lid portion 310. A reader / writer antenna 314 is provided near the lower end of the reader / writer module 313. The antenna 314 may be included in the reader / writer module 313, or may be installed on the surface and covered with a resin.

  The reader / writer module 313 is composed of a member that penetrates the filter case lid 310 and may be removable. In that case, it is fixed to the surface 3101 of the filter case lid 310 with a screw 315. A signal line 316 exits from the reader / writer module 313 and is connected to a control unit such as a vehicle in which the liquid filter device 3 is installed. Data signals are transmitted and received between the reader / writer module 313 and the control unit via the signal line 316.

  Further, the filter case cover 310 is provided with a groove of a male screw 317 on the side surface of the portion extending from the back surface 3102 in the downward direction of FIG.

  The filter element 330 provided inside the filter cartridge 300 includes a cylindrical grid-shaped filter medium support portion 331, a substantially cylindrical filter medium portion 332 provided on the outer periphery of the filter medium support portion 331, and an upper side of the filter medium portion 332. A hollow disk-shaped upper plate 333 provided and a disk-shaped lower plate 334 provided on the lower side of the filter medium portion 332 are configured. The detailed shape of the filter medium part 332 is, for example, a chrysanthemum flower shape in which the filter medium is folded in a bellows shape and wound into a cylindrical shape.

  The filter case body 320 of the filter cartridge 300 is made of, for example, metal such as iron, has an upper opening that opens upward, and is provided with a groove of a female screw 323 along the circumference of the upper opening. A spring 321 is provided at the center of the bottom surface of the filter case main body 320 and supports the center of the lower plate 334 of the filter element 330. Further, the filter case main body 320 has an upper plate restraining portion 324 for restraining the upper plate 333 from above so that the filter element 330 does not come out. The upper plate restraining portion 324 is provided below the female screw 323 of the filter case main body 320.

  When the filter cartridge 300 is not coupled to the filter case lid portion 310, the upper plate 333 of the filter element 330 is in contact with the upper plate restraining portion 324 by the repulsive force of the spring 321 on the bottom surface. For this reason, even when the liquid remains in the filter cartridge 300, the liquid is difficult to leak to the outside.

  On the other hand, when the filter cartridge 300 is coupled to the filter case lid portion 310, the upper plate 333 is pushed downward by the filter case lid portion 310, and a gap is formed between the upper portion of the upper plate restraining portion 324. The liquid flowing from the inflow path of the filter case lid 310 flows into the outside of the filter element 330 from the gap. The liquid that has flowed to the outside of the filter element 330 passes through the filter medium part 332 of the filter element 330, thereby removing foreign substances and flowing into the filter medium part 332, and flows out from the outflow path 312 of the filter case cover part 310. .

  When the liquid filter device 3 is assembled, the female screw 323 of the filter case main body 320 and the male screw 317 of the filter case lid 310 are fitted, and the filter case main body 320 is rotated with respect to the filter case lid 310 to tighten the screw. By tightening, the upper opening of the filter cartridge 300 is sealed.

  The upper plate 333 is made of resin and has an IC tag 336 embedded therein. The supporting method, configuration, and function of the IC tag 336 are the same as those in the first embodiment.

  Data transmitted and received between the reader / writer module 313 and the IC tag 336 may be arbitrary data. For example, when a code indicating that the filter cartridge 300 is a genuine product, a lot number, or the like is stored in the memory of the IC tag 336 and the reader / writer module 313 sends back such information is transmitted. The requested information is returned from the IC tag 336. Accordingly, the control unit that acquires a signal from the reader / writer module 313 determines whether or not the provided filter cartridge 300 is a genuine product. If the filter cartridge 300 is not a genuine product, the controller issues a warning or the engine of a vehicle or the like. Control is done so that output is suppressed and operation is not possible.

  Here, when the liquid filter device 3 is assembled and the filter function is operated, the filter cartridge 300 is filled with a liquid such as oil or water, but the positions of the filter case lid 310 and the filter element 330 are the same. Since the reader / writer module 313 and the IC tag 336 are close to each other, normal communication can be performed. The method for aligning the filter case lid 310 and the filter element 330 is the same as in the first and second embodiments.

  When the same method as in the first embodiment is used, as shown in FIGS. 12 and 13, the locking projection 3181 provided on the first pipe portion 318 that is continuous with the outflow passage 312 of the filter case lid portion 310 includes a filter The inclined surface 3371 of the second pipe portion 337 provided at the center of the upper plate 333 of the element 330 slides and is fixed at the lowermost portion 3372.

  On the other hand, when the same method as in the second embodiment is used, as shown in FIG. 14, the locking protrusion 4371 provided on the second tube portion 437 provided at the center of the upper plate 433 of the filter element 430 is The inclined surface 4191 provided in the first pipe portion 318 continuous with the outflow passage 312 of the case lid portion 410 slides and is fixed at the uppermost portion 4192.

  In any method, when the liquid filter device 3 is assembled, the filter cartridges 300 and 400 are attached to the filter case lid portions 310 and 410 so that the first tube portion 318 is aligned with the second tube portions 337 and 437. Press. Accordingly, the filter elements 330 and 430 having the lower plate 334 pressed against the springs 321 of the filter case main bodies 320 and 420 are pressed against the filter case lid portions 310 and 410.

  When the filter elements 330 and 430 are pressed against the filter case lid portions 310 and 410, the filter elements 330 and 430 rotate with respect to the filter case lid portions 310 and 410, and the locking protrusions 3181 and 4371 are moved to the lowermost portion 3372 or the lowermost portion. The upper part 4192 is securely fixed. The rotation angle here is 180 degrees at the maximum.

  After the positional relationship between the filter elements 330 and 430 and the filter case lid portions 310 and 410 is fixed in this way, the female screw 323 of the filter case main bodies 320 and 420 and the male screw 317 of the filter case lid portions 310 and 410 are fixed. The filter cartridges 300 and 400 are rotated with respect to the filter case cover portions 310 and 410 and tightened with screws to seal.

  As described above, in the present embodiment, the filter case cover portions 310 and 410 include the antenna 314 at the lower end portion of the reader / writer module 313 projecting downward, and the filter elements 330 and 430 include the upper plate 333. , 433 are provided with an IC tag 336, a locking projection 3181 is provided on the first tube portion 318 of the filter case lid portion 310, an inclined surface 3371 is provided on the second tube portion 337 of the upper plate 333, or the filter case lid portion is provided. An inclined surface 4191 is provided on the first tube portion 318 of 410, and a locking projection 4371 is provided on the second tube portion 437 of the upper plate 433. Further, when the filter cartridges 300 and 400 are pressed against the filter case lid portions 310 and 410, the locking projections 3181 and 4371 move on the inclined surfaces 3371 and 4191 and are fixed at the lowest point 3372 or the highest point 4192. I did it.

  As a result, the filter elements 330 and 430 are fixed at predetermined positions with respect to the filter case cover portions 310 and 410, and the IC tag 336 of the filter elements 330 and 430 and the antennas of the filter case cover portions 310 and 410 are fixed. Accordingly, the communication between the IC tag 336 and the reader / writer module 313 can be performed normally.

  As described above, the present invention provides a liquid filter device comprising a filter case lid, a filter element, and a filter case body, and a locking projection for positioning and a lower opening on the inside of the filter case lid. A reader / writer module that protrudes to the side is provided, an antenna is provided in the vicinity of the lower end of the reader / writer module, and the locking projection of the filter case lid is rotated to a single specific position on the upper plate of the filter element. And a guide portion for guiding, and an IC tag is provided. When the filter element is pressed against the filter case lid during assembly, the guide portion of the filter element rotates with respect to the locking projection of the filter case lid. The reader / writer and the IC tag are close to each other at the time of fixation, for example, by fixing when the stop projection comes to a specific position. Was to so that. This enables accurate information transmission in communication between the IC tag installed in the filter element and the reader / writer module installed in the filter case.

  In addition, this invention is not limited to the said embodiment, Of course, the various change in the range which does not deviate from the summary of this invention is possible.

  For example, in the above-described embodiment, a locking protrusion is provided on one of the first tube portion of the filter case lid portion and the second tube portion of the upper plate of the filter element, and the other is viewed from the left and right sides toward the specific position. An inclined surface is provided, the locking projection slides on the inclined surface, and the locking projection is fixed at the lowest point or the highest point, which is a specific position. However, the configuration is not limited to this, and any configuration may be used as long as the locking projection is rotated and fixed at a specific position. For example, the inclined surface may be inclined in one direction toward the specific position. Also, the locking projection is retracted into the tube portion by a spring or the like, and the other tube portion has a partial recess, and the locking projection is fixed by being fitted into the recess. Also good.

  In addition, the filter case lid portion is provided with a liquid outflow portion at the center, the outflow portion is continuous with the first tube portion, and the first tube portion is provided with a locking projection or an inclined portion, A liquid inflow portion may be provided in the center of the filter case lid portion. In this case, the inflow part is continuous with the first pipe part, and the first pipe part is provided with a locking projection or an inclined part.

  In the first and second embodiments, the female case is provided on the inner periphery of the opening of the filter case lid and the male screw is provided on the outer periphery of the opening of the filter case body. A male screw may be provided on the outer periphery of the opening of the part, and a female screw may be provided on the inner periphery of the opening of the filter case body.

  Further, the filter case lid portions 110 and 210 and the filter case main body 120 are coupled to the female screw 117 of the filter case lid portions 110 and 210 by tightening the male screw 123 of the filter case main body 120, and the filter case lid portion 310. 410 and the filter cartridges 300 and 400 are coupled by tightening the male screw 317 of the filter case lid portion 310 and 410 and the female screw 323 of the filter cartridge 300 and 400. A method of coupling these two components Is not limited to this. For example, a male screw and a female screw may be provided in reverse. Or you may make it insert one structure part which provided the sealing material in the edge into the other structure part, without providing a screw | thread. Furthermore, the configuration may be such that the two components are prevented from separating by hooking a hook provided outside the other component onto a projection on the nail provided outside the one component.

1, 2, 3 ... Liquid filter device 100 ... Filter case 110, 210, 310, 410 ... Filter case cover 111, 311 ... Inflow path 112, 312 ... Outflow path 113, 313 ... Reader / writer module 114, 314 ... Antenna 115 , 315 ... Screw 116, 316 ... Signal line 117 ... Female screw 118, 318 ... First pipe part 1181, 3711, 3181, 4371 ... Locking protrusion 1182 ... Lower end 120, 320, 420 ... Filter case body 121 ... Lower support part 122 ... Convex body 123 ... Male screw 130, 230, 330, 430 ... Filter element 131, 331 ... Filter medium support part 132, 332 ... Filter medium part 133, 233, 333, 433 ... Upper plate 1331 ... Surface 134, 334 ... Lower part Plate 1341 ... Projection 136, 336 ... C tag 137, 237, 337, 437 ... 2nd pipe part 1371, 2191, 3371, 4191 ... inclined surface 1372, 3372 ... lowest point 1373 ... sealing member 2192, 4192 ... highest point 3101 ... front surface 3102 ... back surface 300, 400 ... filter cartridge 317 ... male screw 321 ... spring 323 ... female screw 324 ... upper plate restraining part

Claims (14)

A filter case lid comprising a liquid inflow path, the liquid outflow path, and a lower opening that opens downward;
A filter element comprising: a substantially cylindrical filter medium part; a hollow disk-shaped upper plate provided above the filter medium part; and a disk-shaped lower plate provided below the filter medium part;
When the filter element is held inside, a liquid filter device comprising: a lower support portion that supports the lower plate; and a filter case body that includes an upper opening that opens upward,
An inner side of the filter case lid is provided with a locking projection for positioning and a reader / writer module that protrudes toward the lower opening, and an antenna is provided at the lower end of the reader / writer module. ,
The upper plate of the filter element is provided with a guide part that guides the locking projection of the filter case cover part while rotating to a single specific position, and an IC tag,
When the upper opening of the filter case main body is pressed against the lower opening of the filter case lid, the filter element held inside the filter case main body is pushed by the lower support portion of the filter case main body. By being pressed against the filter case lid, the guide portion of the filter element rotates with respect to the locking projection of the filter case lid, and is fixed when the locking projection comes to the specific position,
When the locking projection is fixed at the specific position, the antenna and the IC tag are close to each other,
A liquid filter device. A filter case lid comprising a liquid inflow path and the liquid outflow path;
A filter element comprising: a substantially cylindrical filter medium part; a hollow disk-shaped upper plate provided above the filter medium part; and a disk-shaped lower plate provided below the filter medium part;
When the filter element is held inside, a spring portion that supports the center of the lower plate, an upper opening portion that opens upward, and the upper plate that holds the filter element inside and does not go outside. A liquid filter device comprising a filter case main body that forms a filter cartridge holding the filter element therein,
Below the filter case lid, a locking projection for positioning, and a reader / writer module installed to protrude downward, an antenna is provided at the lower end of the reader / writer module,
The upper plate of the filter element is provided with a guide part that guides the locking projection of the filter case cover part while rotating to a single specific position, and an IC tag,
When the upper opening of the filter case main body is pressed against the filter case lid, the filter element held inside the filter case main body is pressed by the spring portion of the filter case main body and the filter case cover By being pressed against the part, the guide part of the filter element rotates with respect to the locking protrusion of the filter case lid part, and is fixed when the locking protrusion comes to the specific position,
When the locking projection is fixed at the specific position, the antenna and the IC tag are close to each other,
A liquid filter device. Either the inflow path or the outflow path of the filter case lid portion is formed by connecting the filter case main body holding the filter element and the filter case lid portion to the upper plate of the filter element. A first tube portion to be inserted into the hollow disc-shaped hollow portion;
The locking protrusion is provided so as to protrude to the outside of the first pipe portion,
The upper plate of the filter element includes a second pipe portion connected to the inner periphery of the hollow disk shape,
The guide portion includes an inclined surface that is provided on the inner side of the second pipe portion and is inclined toward the specific position.
The locking protrusion moves while sliding on the inclined surface toward the specific position, and is fixed when the locking protrusion reaches the specific position.
The liquid filter device according to claim 1, wherein the liquid filter device is a liquid filter device. The lower end of the locking projection has a shape pointed downward, and the side opposite to the specific position of the inclined surface has a shape pointed upward.
The liquid filter device according to claim 3. A filter case lid comprising a liquid inflow path, the liquid outflow path, and a lower opening that opens downward;
A filter element comprising: a substantially cylindrical filter medium part; a hollow disk-shaped upper plate provided above the filter medium part; and a disk-shaped lower plate provided below the filter medium part;
When the filter element is held inside, a liquid filter device comprising: a lower support portion that supports the lower plate; and a filter case body that includes an upper opening that opens upward,
The upper plate of the filter element is provided with a locking projection provided on the inner periphery of the hollow disk shape and an IC tag,
Inside the filter case lid portion, a guide portion that guides the locking projection of the filter element while rotating to a single specific position, and a reader / writer module that protrudes toward the lower opening portion side are provided. An antenna is provided at the lower end of the reader / writer module,
When the upper opening of the filter case body is pressed against the lower opening of the filter case lid, the filter element held inside the filter case body is pressed against the lower support part of the filter case body. By being pressed against the filter case lid, the locking projection of the filter element rotates with respect to the guide portion of the filter case lid, and is fixed when the locking projection reaches the specific position. And
When the locking projection is fixed at the specific position, the antenna and the IC tag are close to each other,
A liquid filter device. A filter case lid comprising a liquid inflow path and the liquid outflow path;
A filter element comprising: a substantially cylindrical filter medium part; a hollow disk-shaped upper plate provided above the filter medium part; and a disk-shaped lower plate provided below the filter medium part;
When the filter element is held inside, a spring portion that supports the center of the lower plate, an upper opening portion that opens upward, and the upper plate that holds the filter element inside and does not go outside. A liquid filter device comprising a filter case main body that forms a filter cartridge holding the filter element therein,
The upper plate of the filter element is provided with a locking projection provided on the inner periphery of the hollow disk shape and an IC tag,
Below the filter case lid, a guide part that guides the locking projection of the filter element while rotating to a single specific position, and a reader / writer module that protrudes downward is provided, An antenna is provided at the lower end of the reader / writer module,
When the upper opening of the filter case main body is pressed against the filter case lid, the filter element held inside the filter case main body is pressed by the spring portion of the filter case main body and the filter case cover By being pressed against the portion, the locking projection of the filter element rotates with respect to the guide portion of the filter case lid, and is fixed when the locking projection reaches the specific position,
When the locking projection is fixed at the specific position, the antenna and the IC tag are close to each other,
A liquid filter device. Either the inflow path or the outflow path of the filter case lid portion is formed by connecting the filter case main body holding the filter element and the filter case lid portion to the upper plate of the filter element. A first tube portion to be inserted into the hollow disc-shaped hollow portion;
The guide portion includes an inclined surface that is provided outside the first pipe portion and is inclined toward the specific position.
The upper plate of the filter element includes a second pipe portion continuous with the hollow disk-shaped inner periphery,
The locking projection is provided so as to protrude to the inside of the second pipe portion,
The locking protrusion moves while sliding toward the specific position, and is fixed when the locking protrusion reaches the specific position.
The liquid filter device according to claim 5 or 6. The upper end of the locking projection has a shape pointed upward, and the side opposite to the specific position of the inclined surface has a shape pointed downward.
The liquid filter device according to claim 7.   The filter element further includes a protrusion provided on the bottom surface of the lower plate so as to protrude downward, and the protrusion is in contact with the lower support of the filter case body. The liquid filter device according to claim 1 or 5. The upper plate of the filter element is made of resin, and the IC tag is embedded in the resin.
The liquid filter device according to claim 1, wherein the liquid filter device is a liquid filter device. A liquid filter device having a liquid inflow path, a liquid outflow path, a filter case lid having a lower opening that opens downward, and a filter case body having an upper opening that opens upward A filter element provided,
A substantially cylindrical filter medium part, a hollow disk-shaped upper plate provided on the upper side of the filter medium part, and a disk-shaped lower plate provided on the lower side of the filter medium part,
An inner side of the filter case lid is provided with a locking projection for positioning and a reader / writer module that protrudes toward the lower opening, and an antenna is provided at the lower end of the reader / writer module. ,
The upper plate is provided with a guide portion that guides the locking projection of the filter case lid portion while rotating to a single specific position, and an IC tag,
A lower support portion provided at the bottom of the filter case body with the filter element held inside the filter case body when the upper opening of the filter case body is pressed against the lower opening of the filter case lid The guide part of the filter element rotates with respect to the locking protrusion of the filter case cover part, and the locking protrusion comes to the specific position. By the way, fixed
When the locking projection is fixed at the specific position, the antenna and the IC tag are close to each other,
A filter element characterized by that. A filter cartridge that is coupled to a filter case lid portion that includes a liquid inflow path and a liquid outflow path to form a liquid filter device,
A filter element having a substantially cylindrical filter medium part, a hollow disk-shaped upper plate provided on the upper side of the filter medium part, and a disk-shaped lower plate provided on the lower side of the filter medium part;
When the filter element is held inside, a spring portion that supports the center of the lower plate, an upper opening portion that opens upward, and the upper plate that holds the filter element inside and does not go outside. A filter case main body having a deterring part for deterring,
Below the filter case lid, a locking projection for positioning, and a reader / writer module installed to protrude downward, an antenna is provided at the lower end of the reader / writer module,
The upper plate of the filter element is provided with a guide part that guides the locking projection of the filter case cover part while rotating to a single specific position, and an IC tag,
When the upper opening of the filter case main body is pressed against the filter case lid, the filter element held inside the filter case main body is pressed by the spring portion of the filter case main body and the filter case cover By being pressed against the part, the guide part of the filter element rotates with respect to the locking protrusion of the filter case lid part, and is fixed when the locking protrusion comes to the specific position,
When the locking projection is fixed at the specific position, the antenna and the IC tag are close to each other,
A filter cartridge characterized by that. A liquid filter device having a liquid inflow path, a liquid outflow path, a filter case lid having a lower opening that opens downward, and a filter case body having an upper opening that opens upward A filter element provided,
A substantially cylindrical filter medium part, a hollow disk-shaped upper plate provided on the upper side of the filter medium part, and a disk-shaped lower plate provided on the lower side of the filter medium part,
The upper plate is provided with a locking projection for positioning provided on the inner periphery of the hollow disk shape, and an IC tag,
Inside the filter case lid, a guide part that guides the locking projection of the filter element while rotating to a single specific position, and a reader / writer module that protrudes toward the lower opening part side are provided. An antenna is provided at the lower end of the reader / writer module,
When the upper opening of the filter case body is pressed against the lower opening of the filter case lid, the lower support is provided in which the filter element held inside the filter case body is provided at the bottom of the filter case body. The locking projection of the filter element rotates with respect to the guide portion of the filter case lid, and the locking projection comes to the specific position. Fixed in place,
When the locking projection is fixed at the specific position, the antenna and the IC tag are close to each other,
A filter element characterized by that. A filter cartridge that is coupled to a filter case lid portion that includes a liquid inflow path and a liquid outflow path to form a liquid filter device,
A filter element comprising: a substantially cylindrical filter medium part; a hollow disk-like upper plate provided above the filter medium part; and a disk-like lower plate provided below the filter medium part;
When the filter element is held inside, a spring portion that supports the center of the lower plate, an upper opening portion that opens upward, and the upper plate that holds the filter element inside and does not go outside. A filter case main body having a deterring part for deterring,
The upper plate of the filter element is provided with a locking projection provided on the inner periphery of the hollow disk shape and an IC tag,
Below the filter case lid, a guide part that guides the locking projection of the filter element while rotating to a single specific position, and a reader / writer module that protrudes downward is provided, An antenna is provided at the lower end of the reader / writer module,
When the upper opening of the filter case main body is pressed against the filter case lid, the filter element held inside the filter case main body is pressed by the spring portion of the filter case main body and the filter case cover By being pressed against the portion, the locking projection of the filter element rotates with respect to the guide portion of the filter case lid, and is fixed when the locking projection reaches the specific position,
When the locking projection is fixed at the specific position, the antenna and the IC tag are close to each other,
A filter cartridge characterized by that.

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