JP4517659B2 - Ink cartridge and valve device - Google Patents

Description

  The present invention relates to an ink cartridge and a valve device, and in particular, prevents ink leakage from the inside of the ink cartridge when the ink cartridge is removed, and prevents ink and outside air from being attached to the ink jet recording apparatus. The present invention relates to an ink cartridge and a valve device having a configuration capable of forming a flow path.

  As disclosed in Japanese Patent Application Laid-Open No. 2001-113723 (Patent Document 1), an ink cartridge is known that can prevent ink leakage from the ink cartridge when the ink cartridge is detached from the ink jet recording apparatus. . The ink cartridge includes an ink chamber that stores ink, an ink supply port that supplies the ink stored in the ink chamber to the outside, and an ink guide chamber that is formed between the ink chamber and the ink supply port. ing.

A valve body is accommodated in the ink guide chamber, and a cylindrical packing is fitted in the ink supply port. The valve body is biased in a direction in which it is elastically contacted with the cylindrical packing by a compression spring to block the ink flow path, thereby preventing ink leakage from the ink chamber side. When the ink cartridge is installed in the ink jet recording apparatus, the ink supply needle enters the cylindrical packing, and an ink flow path is formed by pushing the valve body toward the ink chamber against the bias of the compression spring. The ink can be supplied.
JP 2001-113723 A (FIG. 4 etc.)

  However, as described above, an ink cartridge that prevents ink leakage from the inside of the ink cartridge includes a valve body that switches between communication and blocking of the ink flow path, and a compression spring that biases the valve body. In addition, an ink guide chamber for attaching the valve body and the compression spring needs to be formed between the ink supply port and the ink chamber, and the structure for forming the ink flow path becomes complicated. Further, since the valve body and the compression spring are attached in the ink guide chamber, the attaching operation becomes difficult and the number of work steps increases. Therefore, there is a problem that the manufacturing cost of the ink cartridge is increased.

  The compression spring is made of metal. Since the metal compression spring cannot be disposed of together with the ink cartridge made of a resin material, it is necessary to disassemble the ink cartridge once and remove the compression spring when disposing of the ink cartridge. For this reason, when a metal compression spring is used, there are problems in that the number of work steps for discarding the ink cartridge increases, and the disposal cost also increases for disposal.

  SUMMARY An advantage of some aspects of the invention is to provide an ink cartridge and a valve device that can reduce the manufacturing cost of the ink cartridge and reduce the disposal cost. Yes.

In order to achieve this object, an ink cartridge according to claim 1 is configured to be detachable from an ink jet recording apparatus that performs recording by discharging ink from a recording head, and includes a flow path provided on the ink jet recording apparatus side. It is intended to communicate, an ink chamber for storing ink, a communicating chamber provided in communication with the ink chamber, a valve member made of tree fat material, a substantially central portion of one surface of the valve member A valve seat that contacts the valve member at the outer periphery of the opening, and a portion that rises from the outer periphery of the valve seat to the ink chamber side and is opposite to one surface of the valve member The urging portion that protrudes inward so as to abut against the valve seat and urges the valve member in a direction to abut against the valve seat portion is integrally made of a rubber-like elastic material, and is disposed in the communication chamber. Support members and Wherein the valve member, the held between the valve seat portion and the urging portion of the supporting member, when the one surface of the valve member which is exposed from the opening of the support member is pressed on the ink chamber side In addition, the valve member is moved against the urging force of the urging portion, is separated from the valve seat portion, the ink chamber communicates with the outside of the ink cartridge, and the portion projecting inward in the urging portion An opening is formed at the center of the urging portion, and a plurality of protrusions are provided on the portion of the valve member that abuts on the inwardly protruding portion of the biasing portion toward the protruding portion.

  The ink cartridge according to claim 2 is the ink cartridge according to claim 1, wherein the valve member is provided so as to protrude from one of the ink jet recording apparatus and the valve member toward the other. Accordingly, the ink cartridge is pushed in a direction away from the valve seat portion when the ink cartridge is mounted on the ink jet recording apparatus.

  The ink cartridge according to claim 3 is the ink cartridge according to claim 2, wherein the operation member is a hollow member provided so as to protrude from the ink jet recording apparatus, and an internal flow path thereof is the ink jet recording apparatus. The internal flow path of the hollow member is formed to communicate with the flow path on the ink chamber and the ink jet recording apparatus side when the ink cartridge is mounted on the ink jet recording apparatus. Has been.

  An ink cartridge according to a fourth aspect of the present invention is the ink cartridge according to the third aspect, wherein the support member causes the hollow member to be in close contact with the inner periphery of the ink cartridge as the ink cartridge is attached to the ink jet recording apparatus. And a sealing means that is fitted and protrudes from the valve seat portion to the opposite side to the biasing portion.

  The ink cartridge according to claim 5 is the ink cartridge according to claim 1 or 2, wherein the support member includes an opening of the valve seat portion and the opening of the valve seat when the ink cartridge is mounted on the ink jet recording apparatus. Sealing means for communicating with the flow path is integrally protruded from the valve seat portion on the side opposite to the urging portion.

  The ink cartridge according to claim 6 is the ink cartridge according to any one of claims 1 to 4, wherein the valve member includes a portion that contacts the valve seat portion and a portion that contacts the biasing portion. A communication passage that communicates between the valve seat portion side and the opposite side is provided in between.

  An ink cartridge according to a seventh aspect is the ink cartridge according to the sixth aspect, wherein the opening of the communication passage of the valve member is formed in a non-circular shape.

The ink cartridge according to claim 8 is the ink cartridge according to claim 6 or 7, wherein the valve member rises toward the ink chamber from a bottom portion facing the opening of the valve seat portion and an outer periphery of the bottom portion. and a valve side wall portion formed Te communication passage of the valve member has a hole penetrating the bottom, a hole passing through the valve side wall portion is formed by communicating.

  The ink cartridge according to claim 9 is the ink cartridge according to any one of claims 6 to 8, wherein the ridge lines constituting the opening on the ink chamber side of the communication path of the valve member have an angle with each other. It is formed on two or more planes.

The ink cartridge according to claim 10 is the ink cartridge according to claim 9, wherein the valve member is erected from the bottom while being in contact with the valve side wall, and a part of the ridge line of the opening of the communication path is formed. Protrusions to be formed are provided .

  The ink cartridge according to claim 11 is the ink cartridge according to any one of claims 1 to 7, wherein the valve member includes a bottom portion facing the opening of the valve seat portion and an outer periphery of the bottom portion. And a portion of the urging portion that rises up along the outer periphery of the valve side wall portion.

  An ink cartridge according to a twelfth aspect is the ink cartridge according to any one of the first to eleventh aspects, wherein a thickness of a portion of the biasing portion located on an outer peripheral portion of the valve member is equal to that of the valve seat portion. The extraction member is formed thinner than the wall thickness in the penetration direction.

The ink cartridge according to claim 13 is the ink cartridge according to claim 4, wherein the support member includes a groove surrounding the periphery of the sealing means and the valve sandwiched between the sealing means and the valve. And an outer peripheral wall protruding in a direction in which the sealing means protrudes from the seat .

  The ink cartridge according to claim 14 is the ink cartridge according to claim 4, wherein an inner periphery of an end portion of the sealing means on the entry side of the hollow member is closer to the valve member side from the entry side. The diameter is small.

  An ink cartridge according to a fifteenth aspect is the ink cartridge according to the fourth, thirteenth, or fourteenth aspect, wherein the inner diameter of the opening of the valve seat is larger than the inner diameter of the sealing means.

  An ink cartridge according to a sixteenth aspect is the ink cartridge according to the sixth aspect, wherein a surface of the valve member facing the valve seat portion is located inside the communication path and outside the opening. An annular projecting member projecting in the valve seat portion direction is formed.

Mounting the ink cartridge according to claim 17, in the ink cartridge according to any of claims 1 to 16, the support member, which protrudes radially outward on an outer peripheral surface of the far side and the urging section And the urging portion is formed to have a smaller outer diameter than the mounting portion, and the communication chamber has a portion accommodating the urging portion, and a stepped shape on the opposite side of the ink chamber with respect to the portion. And a portion that accommodates the attachment portion, and the attachment portion is fixed in contact with the stepped surface of the communication chamber.

The ink cartridge according to claim 18, in the ink cartridge according to any one of the claims 1 to 17, wherein the ink jet recording apparatus is provided to protrude from the ink jet recording apparatus, for introducing outside air into the ink chamber outside air An outside air communication chamber is provided which includes an introduction member and into which the outside air introduction member can be inserted and communicates with the ink chamber. The outside air communication chamber has the same shape as the support member and the valve member.

The valve device according to claim 19 has a valve member that is movably disposed and is made of a resin material, an opening that exposes a substantially central portion of one surface of the valve member, and an outer periphery of the opening. The valve member in contact with the valve member, and rises from the outer periphery of the valve seat portion to the side opposite to the one surface of the valve member and contacts the portion opposite to the one surface of the valve member A support member that projects inward and urges the valve member in a direction in which the valve member abuts against the valve seat portion, which is integrally made of a rubber-like elastic material, and the valve member includes the support member The valve member is held between the valve seat portion and the urging portion, and the valve member moves against the urging force of the urging portion so that the valve member moves away from the valve seat portion and flows on both sides of the valve member. There was communicating, at the center of the overhanging portion inward in the biasing portion opening is formed Ri, the portion of the valve member abutting the flared portion inward in the biasing unit, a plurality of projections are provided toward the overhanging portions.

The valve device according to claim 20 is the valve device according to claim 19 , wherein the support member communicates the opening of the valve seat portion with a flow path of a device detachably connected to the valve device. Sealing means for bringing it into a state is integrally projected from the valve seat portion on the side opposite to the urging portion.

The valve device according to claim 21 is the valve device according to claim 19 , wherein the valve member is configured such that the one surface of the valve member exposed by the opening is attached to the biasing portion by a hollow member. The support member is pushed against the force and is separated from the valve seat portion, and the support member integrally has a sealing means for connecting the hollow member in close contact with the outer periphery thereof, connected to the opening. .

The valve device according to claim 22 is the valve device according to any one of claims 19 to 21 , wherein the valve member includes a portion that contacts the valve seat portion and a portion that contacts the biasing portion. In the meantime, a communication passage for communicating both sides of the valve member is provided so as to penetrate in the moving direction.

The valve device according to a twenty- third aspect is the valve device according to the twenty-second aspect , wherein the opening of the communication passage of the valve member is formed in a non-circular shape.

A valve device according to a twenty-fourth aspect is the valve device according to the twenty-second or twenty- third aspect, wherein the valve member includes a bottom portion facing the opening of the valve seat portion, and an outer periphery of the bottom portion from the valve seat portion. and a valve side wall portion formed rises on the opposite side, communicating passage of the valve member has a hole penetrating the bottom, a hole passing through the valve side wall portion is formed by communicating.

The valve arrangement according to claim 25, in the valve device according to any of claims 22 24, each ridge constituting the opening of the communication passage of the valve member, two or more planes angled to each other Formed on top.

A valve device according to a twenty-sixth aspect is the valve device according to the twenty-fifth aspect , wherein the protrusion portion is erected from the bottom portion while being in contact with the valve side wall portion, and forms a part of a ridge line of the opening portion of the communication passage. It has .

A valve device according to a twenty-seventh aspect is the valve device according to any one of the nineteenth to twenty-sixth aspects, wherein the valve member includes a bottom portion facing an opening of the valve seat portion and an outer periphery of the bottom portion. And a valve side wall portion formed so as to rise to the opposite side of the valve portion, and a portion where the biasing portion rises is formed so as to rise along the outer periphery of the valve side wall portion.

A valve device according to a twenty-eighth aspect is the valve device according to any one of the nineteenth to twenty-seventh aspects, wherein a thickness of a portion of the biasing portion located on an outer peripheral portion of the valve member is equal to that of the valve seat portion. The extraction member is formed thinner than the wall thickness in the penetration direction.

The valve arrangement according to claim 29, in the valve device according to claim 21, wherein the support member has a groove surrounding the periphery of said sealing means, said valve across the groove between the sealing means And an outer peripheral wall protruding in a direction in which the sealing means protrudes from the seat .

A valve device according to a thirty- third aspect is the valve device according to the twenty-first or twenty- ninth aspect, wherein an inner periphery of an end portion of the sealing means on the intrusion side of the hollow member extends from the intrusion side to the valve member side. The diameter is smaller as it goes.

The valve arrangement according to claim 31, in the valve device according to claim 21, 29 or 30, the inner diameter of the opening of the valve seat portion is formed larger than the inner diameter of said sealing means.

A valve device according to a thirty-second aspect is the valve device according to the twenty-second aspect, wherein a surface of the valve member that faces the valve seat portion is located inside the communication passage and outside the opening. An annular projecting member projecting in the valve seat portion direction is formed.

A valve device according to a thirty-third aspect is the valve device according to any one of the nineteenth to thirty-second embodiments, wherein the support member protrudes radially outward from an outer peripheral surface on the valve seat portion side, and the support member The urging portion is formed to have a smaller outer diameter than the mounting portion.

According to the ink cartridge of claim 1, when the ink cartridge is attached to the ink jet recording apparatus and one surface of the valve member exposed from the opening of the support member is pushed toward the ink chamber, When the valve member is pushed against the urging force of the urging portion, the valve member is separated from the valve seat portion and communicates between the ink chamber and the outside of the ink cartridge . In a state where the ink cartridge is removed from the ink jet recording apparatus, the valve member is prevented from coming into contact with the valve seat portion by the urging portion and the ink is prevented from leaking through the opening.

  Moreover, the urging | biasing part and the valve seat part are integrally comprised as a supporting member with the rubber-like elastic material. Therefore, when the ink cartridge is discarded, for example, when it is discarded by incineration, it can be incinerated as it is, and the ink cartridge is disassembled and the metal compression spring compared with the case where the metal compression spring is used. Since there is no need to take out the battery, work efficiency is improved and the disposal cost can be reduced.

Further, since the valve member is held between the urging portion of the support member and the valve seat portion, the ink chamber and the ink jet recording apparatus side can be provided by arranging the support member holding the valve member in the communication chamber. And communication with each other can be performed. This eliminates the need for a complicated operation step of attaching a biasing means for biasing the valve member in the region where the valve member is disposed, and thus has an effect of reducing the manufacturing cost of the ink cartridge.
Furthermore, since the protrusion of the urging portion and the valve member are provided on the portion of the urging portion of the urging portion that is in contact with the portion of the urging portion that protrudes inward, a plurality of protrusions are provided toward the bulging portion. When abutting, both frictional forces are increased and the contact state between the two is maintained. Therefore, when the valve member is separated from the valve seat portion, the valve member is detached from the protruding portion of the biasing portion, and the valve member is sandwiched in the opening formed at the center of the protruding portion of the biasing portion. There is an effect that can be prevented.

  According to the ink cartridge of the second aspect, in addition to the effect produced by the ink cartridge of the first aspect, the valve member is provided so as to protrude from one of the ink jet recording apparatus and the valve member toward the other. When the ink cartridge is attached to the ink jet recording apparatus by the operation member, the ink cartridge is pushed away from the valve seat, so that the ink does not leak in the state where the ink cartridge is not attached to the ink jet recording apparatus. In this state, the ink can be supplied to the ink jet recording apparatus.

  According to the ink cartridge of the third aspect, in addition to the effect produced by the ink cartridge of the second aspect, the operation member is a hollow member that protrudes from the ink jet recording apparatus, and the internal flow path is When the ink cartridge is mounted on the ink jet recording apparatus and formed in communication with the flow path on the ink jet recording apparatus side, the valve member is pushed away from the valve seat by the hollow member, and the internal flow path of the hollow member is connected to the ink chamber. There is an effect that it is possible to communicate with the flow path on the ink jet recording apparatus side.

  According to the ink cartridge of claim 4, the support member is provided with a sealing means for fitting the hollow member in close contact with the inner periphery thereof when the ink cartridge is attached to the ink jet recording apparatus. Since it protrudes integrally from the portion on the opposite side to the urging means, when the ink cartridge is mounted on the ink jet recording apparatus, the ink chamber can communicate with the internal flow path of the hollow member, and ink leaks. There is an effect that can be prevented.

  According to the ink cartridge of claim 5, in addition to the effect exhibited by the ink cartridge of claim 1 or 2, the support member includes the valve as the ink cartridge is attached to the inkjet recording apparatus. Since the seal means for communicating the opening of the seat portion and the flow path is integrally protruded from the valve seat portion on the opposite side of the biasing means, the ink cartridge is attached to the ink jet recording apparatus. There is an effect that the ink chamber and the flow path on the ink jet recording apparatus can be communicated with each other without leakage.

  According to the ink cartridge of the sixth aspect, in addition to the effect exhibited by the ink cartridge according to any one of the first to fourth aspects, the valve member is in contact with the portion that contacts the valve seat portion and the urging portion. Since the communication passage that communicates between the valve seat portion side and the opposite side is provided between the portion and the portion, when the valve member is pushed against the urging force of the urging portion, The valve seat side and the opposite side can be reliably communicated with each other via the communication path, and when the valve member is in contact with the valve seat portion by the biasing portion, There is an effect that the flow path can be reliably blocked.

  According to the ink cartridge of the seventh aspect, in addition to the effect produced by the ink cartridge of the sixth aspect, the opening portion of the communication passage of the valve member is formed in a non-circular shape, and therefore the ink portion is formed in the opening portion. This prevents the formation of a meniscus due to the surface tension of the ink and ensures the smooth distribution of ink. In addition, when the opening part of a communicating path is formed in substantially circle shape, a meniscus is easy to be formed and there exists a possibility that the distribution | circulation of an ink may be prevented.

According to the ink cartridge of the eighth aspect, in addition to the effect produced by the ink cartridge of the sixth or seventh aspect, the valve member includes an ink chamber from a bottom portion facing the opening of the valve seat portion and an outer periphery of the bottom portion. and a valve side wall portion formed to stand up on the side, the communication passage of the valve member has a hole through the bottom, since the holes penetrating the valve side wall portion is formed by communicating an opening As the size of the opening increases, the shape of the opening becomes complicated, and the formation of meniscus can be further prevented.

  According to the ink cartridge of the ninth aspect, in addition to the effect produced by the ink cartridge according to any one of the sixth to eighth aspects, each ridge line constituting the opening on the ink chamber side of the communication path of the valve member is Since they are formed on two or more planes having an angle to each other, there is an effect that the formation of meniscus can be further prevented.

According to the ink cartridge of the tenth aspect, in addition to the effect exhibited by the ink cartridge of the ninth aspect, the valve member is erected from the bottom while being in contact with the valve side wall, and is one of the ridge lines of the opening of the communication passage. Since the projecting portion forming the portion is provided , the shape of the opening becomes more complicated, and there is an effect that meniscus formation can be further prevented.

  According to the ink cartridge of the eleventh aspect, in addition to the effect exhibited by the ink cartridge according to any one of the first to seventh aspects, the valve member includes a bottom portion facing the opening of the valve seat portion, and an outer periphery of the bottom portion. And the valve side wall portion formed to rise to the ink chamber side, and the raised portion of the biasing portion is formed to rise along the outer periphery of the valve side wall portion. When moving toward, the rising portion of the urging portion is easily expanded and contracted, and the valve member can be easily opened and closed.

  According to the ink cartridge of the twelfth aspect, in addition to the effect exhibited by the ink cartridge according to any one of the first to eleventh aspects, the thickness of the portion of the biasing portion located on the outer peripheral portion of the valve member is Since the seat member is formed thinner than the thickness of the hollow member in the intrusion direction, when the valve member moves, the deformation of the valve seat portion is small, and the biasing portion is greatly elastically deformed toward the ink chamber, Therefore, there is an effect that the ink chamber can be reliably communicated with the flow path on the ink jet recording apparatus side.

According to the ink cartridge of the thirteenth aspect, in addition to the effect produced by the ink cartridge of the fourth aspect, the support member sandwiches the groove surrounding the seal means and the groove between the seal means. And the outer peripheral wall protruding in the direction in which the sealing means protrudes from the valve seat portion, the elastic deformation of the sealing means that occurs when the hollow member enters the valve member side can be absorbed in the groove , Even if there is a shift in position with the sealing means, there is an effect that the hollow member can be securely fitted to the sealing means and can be satisfactorily adhered.

  According to the ink cartridge of the fourteenth aspect, in addition to the effect produced by the ink cartridge of the fourth aspect, the inner periphery of the end portion of the sealing member, which is the intrusion side of the hollow member, extends from the intrusion side to the valve member. Since the diameter is configured to be smaller toward the side, there is an effect that the hollow member having an outer diameter larger than the inner diameter of the sealing means can smoothly enter and be brought into close contact with each other.

  According to the ink cartridge of the fifteenth aspect, in addition to the effect exhibited by the ink cartridge of the fourth, thirteenth or fourteenth aspect, the inner diameter of the opening of the valve seat portion is formed larger than the inner diameter of the sealing means. Therefore, when a hollow member formed with an outer diameter larger than the inner diameter of the sealing means enters, the inner peripheral surface of the sealing means is elastically deformed toward the valve member side, but the deformation amount is absorbed in the space in the opening, and thus There is an effect that it is possible to prevent the valve member from being inclined and the flow path communicating between the ink chamber and the hollow member from being blocked by the elastic deformation of the inner peripheral surface of the sealing means.

  According to the ink cartridge of the sixteenth aspect, in addition to the effect produced by the ink cartridge of the sixth aspect, the surface of the valve member that faces the valve seat portion is inside the communication path and outside the opening. Since an annular projecting member projecting in the direction of the valve seat is formed at the position, the ink chamber side and the sealing means side are communicated with each other while the valve member is in contact with the valve seat by the biasing portion. There is an effect that it can be surely blocked by the protruding member, and ink leakage can be more reliably prevented.

According to the ink cartridge of claim 17 , in addition to the effect produced by the ink cartridge of any one of claims 1 to 16 , the support member is arranged in a radial direction on the outer peripheral surface on the side away from the urging portion. A mounting portion projecting outward, the biasing portion being formed smaller in outer diameter than the mounting portion; and the communication chamber includes a portion for housing the biasing portion, and the ink chamber with respect to the portion. A portion formed on a side opposite to the stepped surface and accommodating the mounting portion, and the mounting portion is fixed in contact with the stepped surface of the communication chamber. The insertion position of the ink cartridge is accurately determined by the mounting portion and the stepped surface, and the working efficiency at the time of manufacturing the ink cartridge is improved.

According to the ink cartridge of claim 18 , in addition to the effect produced by the ink cartridge of any one of claims 1 to 17 , the ink jet recording apparatus is provided so as to protrude from the ink jet recording apparatus, An outside air introduction member is formed, and an outside air communication chamber is formed in which the outside air introduction member can be inserted and communicated with the ink chamber, and the same shape as the support member and the valve member is disposed in the outside air communication chamber. Therefore, when manufacturing the ink cartridge, common parts can be used for the support member and the valve member corresponding to the extraction member and the outside air introduction member, and it can be inserted into either the communication chamber or the outside air communication chamber. Can also be made to function in the same manner, so that it can be easily manufactured at low cost.

According to the valve device of the nineteenth aspect , the valve member is urged by the urging portion in a direction to contact the valve seat portion, contacts the valve seat portion, closes the opening, and urges the valve member. It moves away from the valve seat by moving against the bias. Therefore, communication between both sides of the valve member and blocking can be switched.

Moreover, the urging | biasing part and the valve seat part are integrally comprised as a supporting member with the rubber-like elastic material. Therefore, when the valve device is discarded, for example, when it is discarded by incineration, it can be incinerated as it is, and the valve device is disassembled and compared with the case where a metal compression spring is used. Since there is no need to take out the battery, work efficiency is improved and the disposal cost can be reduced.
Furthermore, since the protrusion of the urging portion and the valve member are provided on the portion of the urging portion of the urging portion that is in contact with the portion of the urging portion that protrudes inward, a plurality of protrusions are provided toward the bulging portion. When abutting, both frictional forces are increased and the contact state between the two is maintained. Therefore, when the valve member is separated from the valve seat portion, the valve member is detached from the protruding portion of the biasing portion, and the valve member is sandwiched in the opening formed at the center of the protruding portion of the biasing portion. There is an effect that can be prevented.

According to the valve device of the twentieth aspect , in addition to the effect achieved by the valve device of the nineteenth aspect , the support member integrally protrudes from the valve seat portion on the side opposite to the urging portion and has a sealing means. Therefore, when the valve device is connected to the device, there is an effect that the opening of the valve seat portion and the flow path of the device can be communicated.

According to the valve apparatus according to claim 21, in addition to the effects of the valve arrangement according to claim 19, the valve member, the one surface of the valve member which is exposed by the opening, urged by a hollow member portion The support member is pressed against the urging force and separated from the valve seat portion, and the support member is integrally provided with a seal means connected to the opening so as to closely fit the hollow member to the outer periphery thereof. By fitting the member into the sealing means and pressing the valve member, there is an effect that the portion of the valve member opposite to the hollow member can communicate with the hollow member.

According to the valve apparatus according to claim 22, in addition to the effects of the valve device according to any of claims 19 21, the valve member has a valve seat portion abutting portion, said urging portion and those Since the communication path that allows both sides of the valve member to communicate with each other is provided so as to penetrate in the moving direction, the valve member is moved against the urging force of the urging portion. When the valve seat side and the opposite side can be reliably communicated with each other via the communication passage, and the valve member is in contact with the valve seat portion by the biasing portion, There is an effect that the road can be reliably blocked.

According to the valve apparatus according to claim 23, in addition to the effects of the valve arrangement according to claim 22, opening of the communication passage of the valve member and is formed in non-circular, the liquid in the communication path When passing, there is an effect that the liquid can be prevented from forming a meniscus due to surface tension, and a smooth flow of the liquid can be ensured.

According to the valve device of claim 24 , in addition to the effect produced by the valve device of claim 22 or 23 , the valve member includes the bottom portion facing the opening of the valve seat portion and the valve member from the outer periphery of the bottom portion. and a valve side wall portion formed rises on the opposite side of the seat portion, the communication passage of the valve member includes a hole penetrating the bottom, a hole passing through the valve side wall portion is formed by communicating Therefore, there is an effect that the shape of the opening becomes complicated and the formation of meniscus can be further prevented.

According to the valve device of the twenty-fifth aspect , in addition to the effect produced by the valve device according to any one of the twenty-second to twenty-fourth aspects, the ridge lines constituting the opening of the communication passage of the valve member have an angle with each other. In addition, since it is formed on two or more planes, there is an effect that the formation of meniscus can be further prevented.

According to the valve apparatus according to claim 26, in addition to the effects of the valve arrangement according to claim 25, the valve member is erected from the bottom while being in contact with the valve side wall portion, the ridge line of the opening of the communication passage Since the projection part which forms a part is provided, there exists an effect that it can prevent further that a meniscus is formed.

According to the valve device according to claim 27 , in addition to the effect produced by the valve device according to any one of claims 19 to 26 , the valve member includes a bottom portion facing the opening of the front seat portion, and an outer periphery of the bottom portion. A valve side wall portion formed so as to rise to the opposite side of the valve seat portion, and the raised portion of the biasing portion is formed to rise along the outer periphery of the valve side wall portion. When moving, the rising portion of the urging portion is easily expanded and contracted, and the valve member can be easily opened and closed.

According to the valve device according to claim 28 , in addition to the effect exerted by the valve device according to any one of claims 19 to 27 , the wall thickness of the portion located on the outer peripheral portion of the valve member of the urging portion is Since the valve seat portion is formed thinner than the wall thickness in the intrusion direction of the extraction member, when the valve member moves, the deformation of the valve seat portion is small, and the urging portion is greatly extended. There is an effect that the road can be surely communicated.

According to the valve apparatus according to claim 29, in addition to the effects of the valve arrangement according to claim 21, the support member has a groove surrounding the periphery of the sealing means, the groove between the sealing means Since it includes an outer peripheral wall that protrudes in a direction in which the sealing means protrudes from the valve seat portion , the elastic deformation of the sealing means that occurs when the hollow member enters the valve member side can be absorbed in the groove , Even if the positions of the hollow member and the sealing means are misaligned, there is an effect that the hollow member can be securely fitted to the sealing means and adhered well.

According to the valve device of the thirty- third aspect, in addition to the effect produced by the valve device of the twenty-first or twenty- ninth aspect, the inner periphery of the end portion that becomes the entry side of the hollow member of the sealing means is Since the diameter is configured to be smaller toward the valve member side, there is an effect that the hollow member having the outer diameter larger than the inner diameter of the sealing means can be smoothly infiltrated and securely adhered.

According to the valve device of claim 31 , in addition to the effect of the valve device of claim 21 , 29 or 30 , the inner diameter of the opening of the valve seat portion is formed larger than the inner diameter of the sealing means. When a hollow member having an outer diameter larger than the inner diameter of the sealing means enters, the inner peripheral surface of the sealing means is elastically deformed toward the valve member side, but the amount of deformation is absorbed by the space in the opening, and thus the seal There is an effect that it is possible to prevent the valve member from being inclined and blocking the flow path due to the elastic deformation of the inner peripheral surface of the means.

According to the valve device of the thirty-second aspect , in addition to the effect produced by the valve device of the twenty-second aspect, the surface of the valve member that faces the valve seat portion is inside the communication path and outside the opening. Since the annular projecting member projecting in the direction of the valve seat portion is formed at the position, the flow path is surely blocked by the projecting member while the valve member is in contact with the valve seat portion by the biasing portion. There is an effect that can be.

According to the valve device of the thirty-third aspect , in addition to the effect produced by the valve device according to any one of the nineteenth to thirty-second aspects, the support member protrudes radially outward on the outer peripheral surface on the valve seat portion side. Since the mounting portion for the device to which the support member is attached is formed, and the biasing portion is formed to have a smaller outer diameter than the mounting portion, the insertion position of the support member is accurately determined by the mounting portion and the stepped surface. There is an effect.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic diagram illustrating an ink cartridge 1 and an ink jet recording apparatus 2 in which the ink cartridge 1 is mounted according to an embodiment of the present invention.

  The ink cartridge 1 is configured to be attachable to and detachable from an ink jet recording apparatus 2 including a recording head 7 that ejects ink, and stores ink to be supplied to the recording head 7.

  The ink cartridge 1 includes a hollow box-shaped main body case 1a having an open upper surface and a lid 1b for sealing the open upper surface of the main body case 1a. The ink supplied to the recording head 7 is formed inside the main body case 1a. Stored in the ink chamber 16 (see FIG. 2). The ink jet recording apparatus 2 is provided with a plurality of ink cartridges filled with four color inks of cyan, magenta, yellow, and black.

  The ink jet recording apparatus 2 includes a mounting unit 3 that detachably mounts the ink cartridge 1, a tank 5 that stores ink supplied from the ink cartridge 1 via the ink supply tube 4, and ink stored in the tank 5. A recording head 7 for discharging the ink toward the recording paper 6, a carriage 8 on which the tank 5 and the recording head 7 are mounted and reciprocating in the horizontal direction, a carriage shaft 9 serving as a guide for reciprocating the carriage 8, and recording A transport mechanism 10 for transporting the paper 6 and a purge device 11 are provided.

The mounting portion 3 includes a base portion 3a and guide portions 3b standing from both sides of the base portion 3a. From the base portion 3a sandwiched between the guide portions 3b, ink stored in the ink cartridge 1 is received. A hollow ink extraction tube 12 for extraction and a hollow outside air introduction tube 13 for introducing outside air into the ink cartridge 1 are disposed. The ink extraction pipe 12 and the outside air introduction pipe 13 also function as operation members that open and close a valve device described later. FIG. 1 corresponds to first and second embodiments which will be described later. The third embodiment will be described separately. An ink supply tube 4 is provided at one end of the ink extraction tube 12. Are connected, and the ink extraction tube 12 communicates with the tank 5 through the ink supply tube 4. An outside air introduction tube 15 is connected to one end side of the outside air introduction tube 13, and the outside air introduction tube 13 communicates with outside air via the outside air introduction tube 15.

  The ink cartridge 1 is attached to the attachment portion 3 from the vertical direction (arrow X direction). At this time, the ink extraction pipe 12 and the outside air introduction pipe 13 come into contact with the valve members 32 of the valve devices 23 and 24 provided inside the ink cartridge 1, and push up the valve members 32 to the ink chamber 16 side. The ink chamber 16 communicates with the inside.

  The recording head 7 is provided with a plurality of nozzle holes on the surface facing the recording paper 6, and by driving an actuator made of a piezoelectric element, ink stored in the tank 5 from the nozzle holes is directed toward the recording paper 6. Discharged. In the actual recording operation, recording is performed on the recording paper 6 while the carriage 8 on which the recording head 7 is mounted moves back and forth.

  Further, the recording head 7 is disposed above the mounting portion 3, and the ink in the nozzle hole has a negative pressure (back pressure) due to a water head difference between the ink cartridge 1 mounted in the mounting portion 3 and the nozzle hole. ) Is given.

  The purge device 11 is disposed outside the recording range and faces the recording head 7, and includes a purge cap 11a that covers the nozzle hole forming surface of the recording head 7, and a waste ink tube 11b that communicates with the purge cap 11a. And a pump 11c for sucking ink from the nozzle holes via the waste ink tube 11b.

  When executing the purge process, the carriage 8 is moved to the purge process execution position, and the nozzle hole forming surface of the recording head 7 is covered with the purge cap 11a. In this state, the pump 11c is driven to suck the defective ink containing bubbles and the like accumulated inside the recording head 7. The sucked defective ink is stored in a waste ink tank (not shown) through the waste ink tube 11b. The recording operation and the purge process are controlled under a CPU (not shown) that is a central processing unit mounted on the inkjet recording apparatus 2.

  Next, the configuration of the first embodiment of the joint portion (portion A in FIG. 1) attached to the ink jet recording apparatus 2 of the ink cartridge 1 will be described with reference to FIGS. FIG. 2 is a cross-sectional view of the joint portion showing a state before being mounted on the ink jet recording apparatus 2. FIG. 3 is an enlarged perspective view showing the valve member 32.

  The main body case 1a of the ink cartridge 1 has a partition wall 1c that divides the inside of the cylindrical outer peripheral wall up and down integrally with the cylindrical outer peripheral wall, and an upper compartment is used as the ink chamber 16, and below the partition wall 1c. On the side, there are two communication chambers 30 and 50 opened downward. When the ink cartridge 1 is attached to the attachment portion 3, the ink extraction tube 12 is inserted into one communication chamber 30, and the outside air introduction tube 13 is inserted into the other communication chamber 50.

  The partition wall 1c corresponding to the ceiling of one communication chamber 30 is formed with a communication hole 21 that communicates the ink chamber 16 and the communication chamber 30, and the cylindrical wall 22 that hangs down from the partition wall 1c surrounding the communication hole 21 is formed. At the lower end, a thin film member 31 that closes the communication hole 21 is formed of a resin material integrally with the main body case 1a. In addition, a communication hole 26 that connects the ink chamber 16 and the communication chamber 50 is also formed in the partition wall 1c corresponding to the ceiling of the other communication chamber 50, and a cylindrical wall that hangs from the partition wall 1c and surrounds the communication hole 26. A thin film member 51 that closes the communication hole 26 is formed at the lower end of 27 by a resin material integrally with the main body case 1a. Thereby, the ink in the ink chamber 16 is surely sealed by the main body case 1a and the lid 1b until the thin film members 31, 51 are broken as will be described later. The amount of sag from the partition wall 1c of the cylindrical wall 27 is such that the thin film member 51 on the outside air introduction tube 13 side has a smaller distance from the fracture portion 72 described later than the thin film member 31 on the ink extraction tube 12 side. It is formed larger than the amount of drooping of the wall 22.

  Further, a cylindrical member 25 is provided so as to protrude from the communication hole 26 into the ink chamber 16, and the upper end of the cylindrical member 25 opens above the ink level in the ink chamber 16, The introduced outside air is guided to the upper part of the ink chamber 16 through the cylindrical member 25.

  A valve device 23 is fixed to the communication chamber 30 formed in the main body case 1 a, and a valve device 24 is fixed to the communication chamber 50. The valve device 23 and the valve device 24 are the same, and the valve device 23 will be described below as a representative.

  The valve device 23 includes a support member 46 that is integrally manufactured from a rubber-like elastic member, and a valve member 32 that is made of a resin material. The support member 46 has a substantially cylindrical outer shape, and has a valve seat portion 46a at an intermediate portion in the axial direction thereof, a biasing portion 46b on the ink chamber 16 side of the valve seat portion 46a, and a side opposite to the biasing portion 46b. The cylindrical portion 35 extending from the valve seat portion 46a and the outer peripheral wall 33 extending in parallel with an interval on the outer periphery of the cylindrical portion 35 are integrally formed. The valve member 32 is urged by the urging portion 46b in a direction in contact with the valve seat portion 46a and is accommodated in the urging portion 46b.

  The outer peripheral wall 33 has a mounting portion 33a projecting radially outward at an end on the outer side of the main body case 1a, and a portion of the outer peripheral wall 33 on the ink chamber 16 side and the biasing portion 46b from the mounting portion 33a. Is configured to have an outer diameter smaller than the outer diameter of the mounting portion 33a. The communication chamber 30 includes a portion that houses the urging portion 46b and a portion whose diameter increases outwardly via the stepped surface 44 in order to house the mounting portion 33a on the opposite side of the ink chamber 16 with respect to the portion. have.

  In addition, as shown in the enlarged view in which the fixing portion between the valve device 23 and the communication chamber 30 in FIG. 2 is enlarged, a protrusion 43 is formed on the surface of the stepped surface 44 facing the mounting portion 33a, and the case A holding wall 42 projects outwardly and is connected around the opening of the communication chamber 30 of the main body 1a. After the valve device 23 is inserted into the communication chamber 30, the holding wall 42 bends the holding wall 42 toward the attachment portion 33 a side by heat and presses the attachment portion 33 a against the stepped surface 44 to contact the valve. The device 23 is fixed inside the communication chamber 30. Thereby, the ink is prevented from flowing out from the space formed between the outer peripheral wall 33 of the valve device 23 and the inner wall of the communication chamber 30.

  The valve seat 46a has an opening 41 penetrating in the axial direction at the center thereof. The cylindrical portion 35 forms a sealing means for the ink extraction tube 12 when the ink cartridge 1 is attached to the attachment portion 3, and has a guide path 40 into which the ink extraction tube 12 is inserted. The passage 40 is integrally connected from the valve seat portion 46 a in a state where the passage 40 is in communication with the opening 41. The valve member 32 in contact with the valve seat 46a is exposed to the outside through the opening 41 and the guide path 40, and can face the inserted ink extraction tube 12. The guide path 40 is formed to have an inner diameter smaller than the outer diameter of the ink extraction pipe 12 so as to be in close contact with the inserted ink extraction pipe 12, and the opening 41 is larger than the inner diameter of the guide path 40 and the ink extraction pipe 12. It is formed larger than the outer diameter. The insertion side end of the ink extraction tube 12 of the guide path 40 is formed in a tapered shape that expands outward.

  The cylindrical portion 35 and the outer peripheral wall 33 are separated by an annular groove 34, and the cylindrical portion 35 can be elastically deformed with respect to the outer peripheral wall 33 in a plane perpendicular to the central axis direction of the guide path 40. . Accordingly, the cylindrical portion 35 is easily expanded in diameter (in the direction of arrow Y in FIG. 5) as the ink extraction tube 12 is inserted into the guide path 40, and the adhesion between the guide path 40 and the ink extraction tube 12 is improved. Leakage can be prevented. Even if the ink extraction tube 12 is inserted with an inclination or a displacement with respect to the guide path 40, the ink extraction tube 12 can be inserted into the guide path 40 by the deformation of the cylindrical portion 35. Further, as the ink extraction tube 12 is inserted into the guide path 40, the inner wall portion of the guide path 40 is elastically deformed while being slightly pushed toward the valve member 32, but the deformation is absorbed in the space within the opening 41 having a large diameter, The valve member 32 is not pushed by the deformed inner wall portion of the guide path 40.

  The cylindrical portion 35 is formed in a length that does not reach the lower end of the outer peripheral wall 33, that is, the insertion side end portion of the ink extraction tube 12, and remains on the cylindrical portion 35 when the valve device 23 alone is placed on a desk or the like. The surface on which the ink is placed is not soiled.

  The urging portion 46b has a side wall portion 36 that rises in a cylindrical shape from the outer periphery of the valve seat portion 46a toward the ink chamber 16, and is inwardly connected to the side wall portion 36 so as to contact the ink chamber 16 side of the valve member 32. An overhanging portion 37 is formed, and an opening 37 a is formed at the center of the overhanging portion 37. The urging portion 46b urges the valve member 32 by the elastic force of the side wall portion 36 and the overhanging portion 37 in the direction in which the valve member 32 is brought into contact with the valve seat portion 46a. The part 46a is closely attached. Further, when the ink extraction tube 12 enters the guide path 40 and pushes up the valve member 32 to the ink chamber 16 side, the side wall portion 36 extends and the protruding portion 37 inclines, and the valve member 32 and the valve seat portion 46a are inclined. A gap for the ink flow path is formed therebetween.

  A thickness t1 (see FIG. 5A) of the side wall portion 36 in the radial direction (a direction orthogonal to the axial direction) is a thickness t2 (see FIG. 5A) in the direction in which the ink extraction pipe 12 enters the guide path 40 of the valve seat portion 46a. It is thinner than the thickness of the outer peripheral wall 33 in comparison with the thickness of the outer peripheral wall 33 in comparison with FIG. Therefore, when the valve member 32 is pushed up by the ink extraction pipe 12, the urging portion 46b is greatly elastically deformed compared to the valve seat portion 46a and the outer peripheral wall 33, and a gap is formed between the valve member 32 and the valve seat portion 46a. Form.

  Next, the valve member 32 will be described with reference to FIG.

  The valve member 32 includes a bottom portion 70 that comes into contact with the valve seat portion 46 a of the support member 46, a valve side wall portion 71 that extends cylindrically toward the ink chamber 16 from the outer periphery of the bottom portion 70, and a valve side wall that is substantially at the center of the bottom portion 70. It has a fracture portion 72 that protrudes more toward the ink chamber 16 than the portion 71 and has a tip formed on the ink chamber 16 side.

  The bottom portion 70 protrudes toward the valve seat portion 46a on the end surface facing the valve seat portion 46a at a position closer to the center side than the communication passage 38 and outside the opening 41, and is formed in an annular shape. (See FIG. 2). In a state where the valve member 32 is housed in the support member 46, the valve side wall 71 is brought into close contact with and pressed against the lower surface of the overhanging portion 37 of the urging portion 46b. The portion 46a is elastically deformed and is in close contact with the upper surface of the valve seat portion 46a.

  In the bottom portion 70, a plurality of communication passages 38 communicating with the ink chamber 16 side and the valve seat portion 46 a side of the valve member 32 are formed penetratingly on the outer periphery of the protrusion 39 and on the inner periphery of the valve side wall 71. . In the present embodiment, eight communication paths 38 are formed, but the number is not particularly limited, and any number may be formed.

  The fracture portion 72 is composed of four plate members 73a to 73d arranged in a substantially central portion of the bottom portion 70 and combined in a substantially cross shape, and includes a groove 77 extending in parallel with the axial direction between adjacent plate members. . Each of the plate members 73a to 73d has a first angle (for example, approximately “45 degrees” in the present embodiment) with respect to the central axis extending in the same direction from the tip 76 toward the bottom 70. An inclined first inclined portion 77a, and a second angle connected to the first inclined portion 77a and extending from the first inclined portion 77a toward the bottom portion 70 to an acute angle than the first angle (for example, in this embodiment) , Approximately “10 degrees”). The fracture portion 72 protrudes through the opening 37 a of the overhang portion 37 and is disposed to face the thin film member 31 with a gap between the tip 76 and the thin film member 31.

  Next, the ink extraction pipe 12 and the outside air introduction pipe 13 will be described with reference to FIG. FIG. 4 is a perspective view showing the shape near the tip of the ink extraction tube 12 on the valve member 32 side. Since the ink extraction tube 12 and the outside air introduction tube 13 have the same shape and the same dimensions, the ink extraction tube 12 will be described and the description of the outside air introduction tube 13 will be omitted.

  The tip end of the ink extraction tube 12 on the valve member 32 side is opened, and the contact surface with the valve member 32 is constituted by end surfaces 80a to 80d formed in a substantially flat surface. Further, the ink extraction tube 12 has groove-shaped communication ports 81a to 81d in which the outer peripheral wall 33 of the ink extraction tube 12 is cut off from the contact surface with the valve member 32 of the ink extraction tube 12 to the mounting portion 3 side. Is formed. The communication ports 81 a to 81 d are formed to be substantially uniform on the outer peripheral wall 33 of the ink extraction tube 12. In the present embodiment, the four communication ports 81a to 81d are formed. However, any number of the communication ports 81a to 81d may be formed.

  Since the end surfaces 80a to 80d of the ink extraction tube 12 are formed in a substantially flat surface, the contact surface of the valve member 32 can be pressed substantially evenly when contacting the valve member 32. The ink flow path can be kept constant at all times. Further, since the communication ports 81a to 81d are cut out including the contact surface with the valve member 32 of the ink extraction tube 12, even if the ink extraction tube 12 is in contact with the valve member 32, An ink flow path can be reliably formed.

  Further, even when the ink extraction tube 12 is provided so as to protrude from the mounting portion 3, the tip of the ink extraction tube 12 is not formed into a pointed shape as in the prior art, so that the user can attach to the ink extraction tube 12. There is no injury when touched.

  The valve device 24 arranged in the communication chamber 50 on the outside air introduction side uses exactly the same parts as the ink supply side valve device 23 and is fixed in the same manner, and each part extracts ink from the outside air introduction tube 13. Since the dimensional relationship is the same as that of the tube 12, a detailed description is omitted.

  Here, the operation of the valve device 23 when the ink cartridge 1 is attached to the ink jet recording apparatus 2 will be described with reference to FIG.

  When the ink cartridge 1 is mounted on the mounting portion 3, the ink extraction tube 12 enters the guide path 40 (FIG. 5A), and comes into close contact with the inner surface of the guide path 40 in a state that prevents the outflow of ink. . When the ink extraction tube 12 and the valve member 32 come into contact with each other and the valve member 32 is pushed to the ink chamber 16 side (FIG. 5B), the valve member 32 resists the elasticity of the urging portion 46b. Pushed away from 46a. Further, when the valve member 32 is pushed up, the tip 76 of the breaking portion 72 comes into contact with the thin film member 31 and breaks the thin film member 31. As a result, the ink in the ink chamber 16 is supplied to the communication chamber 30, enters the opening 37 a at the upper end of the valve device 23, and passes from the communication path 38 of the valve member 32 to the lower surface of the valve member 32 and the upper surface of the valve seat portion 46 a. Between the communication ports 81 a to 81 d and into the ink extraction tube 12 (ink flow path B), and is supplied to the recording head 7. The operation of breaking the thin film member 31 by the breaking portion 72 will be described in detail later.

  On the other hand, simultaneously with the penetration of the ink extraction pipe 12, the outside air introduction pipe 13 also enters the valve device 24 on the communication chamber 50 side, and pushes up the valve member 32 in the same device. The thin-film member 51 on the outside air introduction tube 13 side is broken earlier than the thin-film member 31 on the ink extraction tube 12 side because the gap between the thin film member 51 on the outside air introduction tube 13 side and the tip 76 of the fracture portion 72 is smaller than the thin-film member 31 on the ink extraction tube 12 side. . In general, the ink cartridge 1 is packaged in a packaging bag in a reduced pressure state in order to keep the ink in the deaerated state, and the ink chamber 16 is also in a reduced pressure state. As described above, by quickly breaking the thin film member 51 on the outside air introduction tube 13 side, outside air is introduced into the upper portion of the ink chamber 16 through the cylindrical member 25, and then the thin film member 31 on the ink extraction tube 12 side is broken. Thus, the ink supply to the ink extraction tube 12 is ensured. If the thin film member 31 on the ink extraction tube 12 side is broken early, air enters the ink flow path to the ink extraction tube 12 and hinders the smooth supply of ink.

  When the ink cartridge 1 is pulled up from the mounting portion 3 in order to remove the mounted ink cartridge 1 from the ink jet recording apparatus 2, the ink extraction tube 12 and the outside air introduction tube 13 are separated from the corresponding valve members 32, and the biasing portion 46b Each valve member 32 returns to the state closely_contact | adhered to the valve seat part 46a by the urging | biasing effect | action. At this time, since the annular projecting member 39 is provided on the surface of the valve member 32 facing the valve seat portion 46a, the ink chamber 16 is reliably sealed, and ink leakage is prevented. Further, the ink remaining in the vicinity of the opening 41 of the valve seat 46a on the ink extraction tube 12 side is blocked by the valve member 32 so that atmospheric pressure does not act, and the guide path 40 has a small diameter ( When the diameter is about 2 mm), a meniscus is formed and held at that position, and does not sag outside.

  Next, with reference to FIG. 6, a state in which the thin film member 31 is broken by the breaking portion 72 will be described. The manner in which the thin film member 51 is ruptured by the outside air introduction tube 13 is the same as that of the thin film member 31 by the ink extraction tube 12, and the description thereof is omitted.

  6A-1 shows a state in which the fracture portion 72 is pushed up together with the valve member 32 toward the ink chamber 16, and the tip 76 is in contact with the thin film member 31. FIG. In this state, the thin film member 31 is not yet broken (state of FIG. 6A-2).

  FIG. 6B-1 shows a state in which the broken portion 72 is further pushed up and the thin film member 31 is broken by the first inclined portions 74a to 74d. Since the thin film member 31 is in contact with the first inclined portions 74a to 74d of the fracture portion 72 and is in close contact with the planar shape of the fracture portion 72, the groove 77 is closed in this state, and the ink flow path. Is hardly formed (FIG. 6B-2).

  FIG. 6C-1 shows a state where the ink cartridge 1 has been completely installed in the inkjet recording apparatus 2, and the thin film member 31 is pushed and spread by the second inclined portions 75a to 75d of the breaking portion 72. . Therefore, a groove 77 between the plate members 73 a to 73 d is opened, and an ink flow path C connecting the ink chamber 16 and the ink extraction tube 12 is formed. Further, four ink flow paths C are formed substantially evenly on the outer periphery of the fracture portion 72, so that ink can be supplied to the ink extraction tube 12 side substantially evenly.

  In addition, when the thin film member 31 is expanded by changing from the first inclined parts 74a to 74d to the second inclined parts 75a to 75d, the bending angle of the broken part of the thin film member 31 is changed, and the broken part is changed to each plate member. The ink flow path is formed away from the groove 77 between 73a to 73d as described above. Further, since the adhesion between the thin film member 31 and each of the plate members 73a to 73d is lowered, when the ink cartridge 1 is detached, the rupture portion 72 and the thin film member 31 are reliably connected by the urging force of the urging portion 46b. Be released.

  As described above, according to the ink cartridge described in the first embodiment, the valve member 32 having the rupture portion 72 having the tip that breaks the thin film member 31 formed in a pointed shape is held by the support member 46. The support member 46 is fixed in the communication chamber 30. Therefore, when the ink cartridge 1 is installed in the ink jet recording apparatus 2, the valve member 32 is pushed up to the ink chamber 16 side by the ink extraction tube 12 to open the valve, and the thin film member 31 is broken, so that the ink chamber 16 and the ink are removed. Ink channels B and C connecting the extraction tube 12 are formed. Therefore, it is not necessary to form the ink extraction tube 12 with a pointed tip, so that the user can be prevented from being injured by the ink extraction tube 12, and safety can be improved. Furthermore, since the valve member 32 and the support member 46 on the outside air introduction pipe 13 side are also formed in the same shape, safety can be further improved.

  Further, since it is not necessary to form the ink extraction tube 12 with a pointed tip, it is not necessary to newly provide a protective device or the like for preventing the ink extraction tube 12 from being exposed, and the ink jet recording apparatus is increased in scale. In addition, the number of parts does not increase, so that the production cost can be prevented from increasing.

  In the first embodiment, the valve member 32 is formed by integrally forming the rupture portion 72 having a pointed tip, the bottom portion 70, and the valve side wall portion 71. However, the rupture portion breaks the thin film member. It is also possible to separately configure the valve for communicating and blocking between the ink chamber 16 side and the outside of the main body case 1a.

  Next, a second embodiment of the joint portion will be described with reference to FIGS. FIG. 7 is a cross-sectional view of the joint portion showing a state before being mounted on the inkjet recording apparatus 2 as in FIG. Parts having the same shape and function as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment.

  The main body case 1a of the ink cartridge 1 of the second embodiment has an ink chamber 16 formed in a shape having an open upper surface by a cylindrical outer peripheral wall and a bottom wall 1e, and includes a cap member 1f that covers the bottom surface. Further, two cylindrical walls 1g and 1h forming two communication chambers 30 and 50 opened downward are formed below the bottom wall 1e, and the valve device 23 is connected to the communication chamber 50 in the communication chamber 30. The valve device 24 is fixed. The valve device 23 and the valve device 24 are the same, and when the ink jet recording apparatus 2 is mounted, the ink extraction pipe 12 is inserted into the communication chamber 30 and the outside air introduction pipe 13 is inserted into the communication chamber 50. Is done.

  Similarly to the first embodiment, the valve devices 23 and 24 include a support member 46 that is integrally manufactured from a rubber-like elastic member, and a valve member 32 that is made of a resin material. The support member 46 has basically the same structure as the support member 46 of the first embodiment, but the outer peripheral wall 33 does not protrude longer than the cylindrical portion 35 as in the first embodiment. The outer peripheral wall 33 and the mounting portion 33a are formed substantially on the same plane as the valve seat portion 46a. The mounting portion 33a is fixed to the lower ends of the cylindrical walls 1g and 1h between the stepped surface 44 formed as a part of the communication chambers 30 and 50 and the cap member 1f. The devices 23 and 24 are fixed to the main body case 1a.

  FIG. 8 is a view showing details of the valve member 32. The valve member 32 basically includes a bottom portion 70 and a valve side wall portion 71 that extends vertically and upwardly from the outer periphery of the bottom portion 70 in the same manner as in the first embodiment. The communication passage 38 is continuously formed across the bottom 70 and the valve side wall 71 at a plurality of locations, and on one side of each communication passage 38, one side rises from the bottom 70 at a right angle to the valve side wall 71. A substantially rectangular protrusion 59 is formed in contact therewith. When the ink passes through the ink chamber 16 for the first time, the opening of the communication path is likely to form a meniscus due to the surface tension of the ink when the ink is substantially circular, and prevents smooth ink outflow. In order to prevent the formation of a meniscus, first, the opening is non-circular. Furthermore, as an effective method, the opening is formed by a plurality of planes.

  The ridgeline of the communication passage 38 described in the second embodiment is formed in a substantially rectangular shape in plan view and extends over two surfaces where the bottom portion 70 and the valve side wall portion 71 intersect at substantially right angles.

  Further, a substantially rectangular protrusion 59 is formed to rise vertically from the opening of the communication path 38 along one ridge line of the communication path 38. Therefore, the opening of the communication passage 38 is formed across the surface formed by the protrusion 59, the surface formed by the bottom 70, and the surface formed by the valve side wall 71. As a result, the shape of the opening becomes three-dimensionally complicated, and meniscus formation can be further prevented. On the side of the bottom 70 that contacts the valve seat 46a, a projection 39 is formed in an annular shape at a position on the center side of the communication passage 38 and on the outside of the opening 41, and the valve member 32 is closed. If it is, it is in close contact with the valve seat 46a.

  Further, in the second embodiment, a communication hole 26 is formed in a tapered shape following the upper part of the communication chamber 50 on the outside air introduction side, and the cylindrical member 25 is formed integrally with the bottom wall 1e so as to communicate with them. The upper end of the cylindrical member 25 is opened above the ink liquid level in the ink chamber 16.

  A check valve 60 is provided in the communication hole 21 on the ink supply side. The check valve 60 is configured by integrally molding an umbrella-like elastic film part 60b facing the lower surface of the communication hole 21 and a shaft part 60c supporting the film part at one end with a synthetic resin material. The shaft portion 60c is inserted into the through hole of the bottom wall 1e so as to be slidable up and down. Normally, the bulging portion 60a is brought into contact with the upper surface of the bottom wall 1e at a position where the film portion 60b is spaced from the communication hole 21. The ink flow from the ink chamber 16 toward the valve device 52 is enabled. When a flow from the ink extraction tube 12 side to the ink chamber 16 occurs, the film portion 60b rises to block the communication hole 21, and the flow is blocked. As described above, since the ink chamber 16 is packaged in a decompressed state, when the ink cartridge is installed in the ink jet recording apparatus, the ink supply side valve device 23 is opened prior to the outside air introduction side valve device 24. Since a flow from the ink extraction tube 12 side to the ink chamber 16 occurs, this is prevented by the check valve 60.

  In the configuration of the second embodiment described above, when the ink cartridge 1 is mounted on the mounting portion 3, the ink extraction tube 12 is inserted into the guide path 40 and pushes up the valve member 32. The valve member 32 pushes up the overhanging portion 37 of the urging portion 46 b, the side wall portion 36 extends, the valve member 32 moves away from the valve seat portion 46 a, and communicates through a communication passage 38 formed in the valve member 32. The chamber 30 and the ink extraction tube 12 are communicated with each other. At the same time, the outside air introduction tube 13 communicates with the communication chamber 50, and outside air is introduced into the ink chamber.

  FIG. 9 is a view showing a modification of the valve member 32 shown in FIG. As described above, when the ink cartridge 1 is attached to the attachment portion 3, the ink extraction tube 12 and the outside air introduction tube 13 push up the valve member 32, and the valve member 32 is an urging portion formed on the support member 46. The overhanging portion 37 of 46b is pushed up.

  On the other hand, there are errors in the lengths of the ink extraction pipe 12 and the outside air introduction pipe 13, and the position of the valve member 32 from the bottom of the ink cartridge 1 is also determined by many parts. May cause a relatively large error. If this error is large, when the ink cartridge 1 is attached to the attachment portion 3, the valve member 32 is pushed up to the vicinity of the opening 37a provided in the overhang portion 37 and is sandwiched between the openings 37a. When the ink cartridge 1 is removed from the mounting portion 3 in such a state, the valve member 32 does not come into contact with the valve seat portion 46a and ink leaks.

  Therefore, in this modification, as shown in FIG. 9, a plurality of pointed protrusions 71a are provided on the valve side wall portion 71 of the valve member 32, and the upper surface of the valve side wall portion 71 is stretched even if the biasing portion 46b extends. Both frictional forces are increased so that the contact state with the protruding portion 37 does not come off.

  FIG. 10 is a diagram showing an example in which an annular protrusion 37b is formed on the overhanging portion 37 of the support member 46 in order to achieve the same purpose. The annular protrusion 37 b is formed so as to be positioned inside the annular valve side wall 71 of the valve member 32.

  With these configurations, by providing an uneven portion that engages one or both of the valve member 32 and the overhang portion 37, relative movement in the radial direction of both can be prevented. It is possible to prevent the return to the closed position.

  FIG. 11 is a cross-sectional view of the joint portion and the mounting portion 3 of the ink cartridge according to the third embodiment. This embodiment differs from the second embodiment shown in FIG. 7 in the valve device on the outside air introduction side of the ink cartridge and the mounting portion 3 on the ink jet recording apparatus side, and the valve device on the ink supply side is the same. Therefore, the description on the ink supply side is omitted.

  The valve device on the outside air introduction side includes a support member 46 and a valve member 32. The support member 46 is integrally made of a rubber-like elastic member similarly to the support member 46 of the first and second embodiments, and has a valve seat portion 46a and an urging portion 46b on the upper portion thereof, and these structures The function is the same as that of the valve seat portion 46a and the urging portion 46b of the first and second embodiments.

  An opening 41 that exposes the center of the lower surface of the valve member 32 to the outside is formed at the center of the valve seat portion 46a, and a seal portion 63 that surrounds the opening 41 in an annular shape at an interval is opposite to the biasing portion 46b. It protrudes to the side.

  FIG. 12 is a diagram showing details of the valve member 32. As in the valve member shown in FIG. 8, the valve member 32 includes a bottom portion 70 and a valve side wall portion 71 in the valve portion 68, and other detailed configurations such as the communication passage 38 and the protruding portion 59 are also shown in FIG. Therefore, the description is omitted.

  In this embodiment, the bottom portion 70 has a cylindrical member 66 raised vertically from the upper surface. Even when the valve member 32 is pushed up from the valve seat portion 46a when the ink cartridge is normally attached to the attachment portion 3, the cylindrical member 66 is positioned with its upper end spaced apart from the inner surface of the cylindrical member 25, and the ink chamber 16 and the valve Communication with the opening 41 of the seat 46a is ensured.

  In addition, the bottom portion 70 has an operation member 67 that extends vertically downward from the opening 41 on the surface exposed from the opening 41. A plurality of recesses 67 a extending in the axial direction are formed on the outer periphery of the operation member 67.

  FIG. 11A is a diagram illustrating a state before the ink cartridge 1 is mounted on the mounting portion 3 of the inkjet recording apparatus 2, and the lower end of the operation member 67 is slightly above the lowermost end of the seal portion 63. It arrange | positions so that it may be located. In this state, both the valve member 32 on the ink supply side and the valve member 32 on the outside air introduction side are pressed against the valve seat portion 46a of the support member 46, and each valve device is not opened.

  On the other hand, as for the mounting portion 3 of the ink jet recording apparatus 2, the ink supply side is formed with a protruding ink extraction tube 12 like the first and second embodiments, and the periphery of the ink extraction tube 12 is a sponge. A porous body 3c such as the like is laid to absorb the leaked ink. On the outside air introduction side, a recess 3d is formed corresponding to the seal portion 63, and an outside air introduction tube 13 is formed on the bottom surface of the recess 3d.

  As shown in FIG. 5B, when the ink cartridge 1 is mounted, the tip of the ink extraction tube 12 pushes up the valve member 32 on the ink supply side, as in the first and second embodiments. The valve device is opened.

  On the outside air introduction side, with the tip of the operating member 67 abutting against the bottom of the recess 3d and the valve member 32 being fixed, the valve seat 46a is moved downward and the valve device is opened. At the same time, the lower end of the seal portion 63 is in close contact with the bottom of the recess 3d, and communicates with the ink chamber 16 via the valve device 24 in which the outside air introduction tube 13 is opened.

  In the third embodiment, the valve member 32 having the operation member 67 is provided on the atmosphere introduction side, and the valve member 32 is opened on the ink supply side by the ink extraction pipe 12 protruding from the mounting portion 3. However, the ink supply side may include the valve member 32 including the operation member 67 so that the ink extraction tube 12 does not protrude from the mounting portion 3.

  The present invention has been described above based on the embodiments. However, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. It can be easily guessed.

  For example, in the above embodiment, the outer shape of the valve devices 23, 24 is slightly smaller than the inner shape of the communication chambers 30, 50, and is pressed and fixed by the pressing member 42. It may be formed slightly larger than the inner shape of the communication chambers 30 and 50, and the valve devices 23 and 24 may be pushed into and fitted into the communication chambers to be fixed.

  In the above embodiment, the ink extraction pipe 12 and the outside air introduction pipe 13 are cut out including the tip on the ink chamber 16 side to form the communication ports 81a to 81d. In addition, a communication port that communicates the inside and the outside may be formed in the side wall of the outside air introduction pipe 13.

It is the schematic which showed the inkjet recording device to which this invention is applied. FIG. 3 is a cross-sectional view of a joint portion of the ink cartridge according to the first embodiment. It is a perspective view which expands and shows the valve member of 1st Example. It is the perspective view which showed the shape of the front-end | tip part vicinity used as the valve member side of an ink extraction pipe | tube and an external air introduction pipe | tube. FIGS. 5A and 5B are operation explanatory views for explaining the relationship between the ink extraction pipe and the valve device. FIG. 5A shows a state before the valve member is opened, and FIG. 5B shows a state where the valve member is opened. It is operation | movement explanatory drawing explaining the state change by which a thin film member is fractured | ruptured, FIG.6 (a-1), FIG.6 (b-1), FIG.6 (c-1) is a side view, FIG. a-2), FIG. 6B-2, and FIG. 6C-2 are plan views. It is sectional drawing of the joint part of the ink cartridge of 2nd Example. It is a figure which shows the valve member of 2nd Example. The modification of a valve member is shown, (a) is a top view, (b) is a side view, (c) is a BB line section of (a), (d) is a CC line of (a). Sectional drawing and (e) are bottom views. It is sectional drawing which shows the modification of the supporting member of a valve apparatus. In sectional drawing of the ink cartridge of 3rd Example, (a) shows before mounting, (b) shows after mounting. The valve member of 3rd Example is shown, (Ma) is a top view, (b) is a side view, (c) is a bottom view.

DESCRIPTION OF SYMBOLS 1 Ink cartridge 2 Inkjet recording device 3 Mounting part 12 Ink extraction tube (operation member)
13 Outside air introduction pipe (operation member)
16 Ink chambers 23 and 24 Valve device 30 Communication chamber (ink supply side)
31, 51 Thin film member 32 Valve member 33a Mounting portion 34 Groove 35 Cylindrical portion (sealing means)
38 Communication passage 39 Projection member 44 Stepped surface 46 Support member 46a Valve seat portion 46b Energizing portion 50 Communication chamber (outside air introduction side)
60 Check valve 63
Sealing part (sealing means)
67 Operation members

Claims (33)

In an ink cartridge configured to be detachable from an ink jet recording apparatus that performs recording by discharging ink from a recording head, and communicating with a flow path provided on the ink jet recording apparatus side,
An ink chamber for storing ink;
A communication chamber provided in communication with the ink chamber;
A valve member made of tree fat material,
A valve seat that has an opening that exposes a substantially central portion of one surface of the valve member and that contacts the valve member at an outer periphery of the opening; and rises from the outer periphery of the valve seat to the ink chamber side; An urging portion that protrudes inward so as to abut against a portion opposite to one surface of the valve member and urges the valve member in a direction to abut against the valve seat portion is integrally made of a rubber-like elastic material. A support member disposed in the communication chamber,
The valve member is held between the valve seat portion and the biasing portion of the support member, and when one surface of the valve member exposed from the opening of the support member is pushed to the ink chamber side, The valve member is moved against the urging force of the urging portion, and is separated from the valve seat portion, and the ink chamber communicates with the outside of the ink cartridge ,
An opening is formed in the center of the portion projecting inward in the urging portion,
The ink cartridge according to claim 1, wherein a plurality of protrusions are provided on a portion of the valve member that abuts on an inwardly protruding portion of the urging portion toward the protruding portion.   When the ink cartridge is mounted on the ink jet recording apparatus by the operation member provided so as to protrude from one of the ink jet recording apparatus and the valve member to the other, the valve seat The ink cartridge according to claim 1, wherein the ink cartridge is pushed in a direction away from the portion.   The operation member is a hollow member provided so as to protrude from the ink jet recording apparatus, and an internal flow path thereof is formed to communicate with a flow path on the ink jet recording apparatus side, and an ink cartridge is attached to the ink jet recording apparatus. 3. The ink cartridge according to claim 2, wherein an inner flow path of the hollow member communicates with the ink chamber and the flow path on the ink jet recording apparatus side.   When the ink cartridge is mounted on the ink jet recording apparatus, the support member has a sealing means for fitting the hollow member in close contact with the inner periphery thereof from the valve seat portion to the biasing portion. The ink cartridge according to claim 3, wherein the ink cartridge projects integrally to the side.   When the ink cartridge is attached to the ink jet recording apparatus, the support member is provided with a sealing means for bringing the opening of the valve seat portion into communication with the flow passage from the valve seat portion to the biasing portion. The ink cartridge according to claim 1, wherein the ink cartridge projects integrally on the opposite side.   The valve member includes a communication passage that communicates between the valve seat portion side and the opposite side between a portion that contacts the valve seat portion and a portion that contacts the biasing portion. The ink cartridge according to any one of claims 1 to 4, characterized in that:   The ink cartridge according to claim 6, wherein the opening of the communication passage of the valve member is formed in a non-circular shape. The valve member has a bottom portion facing the opening of the valve seat portion, and a valve side wall portion formed to rise from the outer periphery of the bottom portion to the ink chamber side,
The ink cartridge according to claim 6 or 7, wherein the communication passage of the valve member is formed by communicating a hole penetrating the bottom portion and a hole penetrating the valve side wall portion.   The ink according to any one of claims 6 to 8, wherein each ridge line constituting the ink chamber side opening of the communication passage of the valve member is on two or more planes having an angle with each other. cartridge.   The said valve member is provided with the projection part which stands upright from the said bottom part, contacting the said valve | bulb side wall part, and forms a part of ridgeline of the opening part of the said communicating path. ink cartridge.   The valve member has a bottom portion facing the opening of the valve seat portion, and a valve side wall portion formed to rise from the outer periphery of the bottom portion to the ink chamber side, and a portion where the urging portion rises is The ink cartridge according to claim 1, wherein the ink cartridge rises along an outer periphery of the valve side wall.   The thickness of the portion of the urging portion located on the outer peripheral portion of the valve member is formed thinner than the thickness of the valve seat portion in the intrusion direction of the extraction member. The ink cartridge according to any one of 1 to 11. The support member is
A groove surrounding the periphery of the sealing means;
The ink cartridge according to claim 4, further comprising an outer peripheral wall projecting in a direction in which the seal means protrudes from the valve seat portion with the groove interposed between the seal means and the valve seat portion.   5. The ink cartridge according to claim 4, wherein an inner periphery of an end portion of the sealing unit on the entry side of the hollow member has a diameter that decreases from the entry side toward the valve member side. .   The ink cartridge according to claim 4, 13, or 14, wherein an inner diameter of the opening of the valve seat portion is formed larger than an inner diameter of the sealing means.   An annular projecting member projecting in the direction of the valve seat portion is formed on a surface of the valve member facing the valve seat portion at a position inside the communication path and outside the opening. The ink cartridge according to claim 6. The support member has a mounting portion protruding radially outward on the outer peripheral surface on the side away from the biasing portion, and the biasing portion is formed to have a smaller outer diameter than the mounting portion,
The communication chamber has a portion that accommodates the urging portion, and a portion that is formed on the opposite side of the ink chamber to the portion via a stepped surface and accommodates the attachment portion.
The ink cartridge according to claim 1, wherein the attachment portion is fixed in contact with the stepped surface of the communication chamber. The ink jet recording apparatus includes an outside air introduction member that protrudes from the ink jet recording apparatus and introduces outside air into the ink chamber.
2. An outside air communication chamber is formed in which the outside air introduction member can be inserted and communicated with the ink chamber, and the same shape as the support member and the valve member is disposed in the outside air communication chamber. 18. The ink cartridge according to any one of items 17 to 17. A valve member arranged movably and made of a resin material;
A valve seat having an opening exposing a substantially central portion of one surface of the valve member and contacting the valve member at an outer periphery of the opening; and the one of the valve members from the outer periphery of the valve seat. An urging portion that protrudes inward so as to stand up to the opposite side of the surface and abut against a portion opposite to the one side of the valve member, A support member that is integrally made of an elastic material,
The valve member is held between the valve seat portion and the urging portion of the support member, and the valve member moves away from the urging force of the urging portion, thereby moving away from the valve seat portion, The flow paths on both sides of the valve member communicate with each other,
An opening is formed in the center of the portion projecting inward in the urging portion,
The valve device according to claim 1, wherein a plurality of protrusions are provided on a portion of the valve member that abuts an inwardly protruding portion of the urging portion toward the protruding portion.   The support member has sealing means for bringing the opening of the valve seat portion into communication with a flow path of a device that is detachably connected to the valve device, from the valve seat portion to the side opposite to the biasing portion. The valve device according to claim 19, wherein the valve device projects integrally with the valve device.   The valve member is configured such that the one surface of the valve member exposed by the opening is pushed against the urging force of the urging portion by a hollow member and separated from the valve seat portion, and the support member 21. The valve device according to claim 19, wherein the valve device has integrally a seal means for fitting the hollow member in close contact with the outer periphery thereof, connected to the opening.   The valve member is provided with a communicating path that allows both sides of the valve member to communicate with each other between a portion in contact with the valve seat portion and a portion in contact with the biasing portion. The valve device according to any one of claims 19 to 21, characterized in that   The valve device according to claim 22, wherein the opening portion of the communication passage of the valve member is formed in a non-circular shape.   The valve member has a bottom portion facing the opening of the valve seat portion, and a valve side wall portion formed to rise from the outer periphery of the bottom portion to the side opposite to the valve seat portion, and the communication passage of the valve member 24. The valve device according to claim 22 or 23, wherein a hole penetrating the bottom portion and a hole penetrating the valve side wall portion are formed to communicate with each other.   The valve device according to any one of claims 22 to 24, wherein each ridge line constituting the opening of the communication passage of the valve member is on two or more planes having an angle with each other.   26. The valve device according to claim 25, further comprising: a protruding portion that stands from the bottom portion in contact with the valve side wall portion and forms a part of a ridge line of the opening portion of the communication path.   The valve member has a bottom portion facing the opening of the valve seat portion, and a valve side wall portion formed to rise from the outer periphery of the bottom portion to the opposite side of the valve seat portion, and the rising portion of the biasing portion 27. The valve device according to any one of claims 19 to 26, wherein the portion rises along an outer periphery of the valve side wall.   The thickness of the portion of the urging portion located on the outer peripheral portion of the valve member is formed thinner than the thickness of the valve seat portion in the intrusion direction of the extraction member. The valve device according to any one of 19 to 27. The support member is
A groove surrounding the periphery of the sealing means;
The valve device according to claim 21, further comprising an outer peripheral wall projecting in a direction in which the seal means protrudes from the valve seat portion with the groove sandwiched between the seal means.   30. The inner circumference of the end portion of the sealing means on the intrusion side of the hollow member is configured such that the diameter decreases from the intrusion side toward the valve member side. Valve device.   The valve device according to claim 21, 29, or 30, wherein an inner diameter of the opening of the valve seat portion is formed larger than an inner diameter of the sealing means.   An annular projecting member projecting in the direction of the valve seat portion is formed on a surface of the valve member facing the valve seat portion at a position inside the communication path and outside the opening. The valve device according to claim 22. The support member protrudes radially outward on the outer peripheral surface on the valve seat side, and has an attachment portion for a device to which the support member is attached, and the biasing portion is formed to have a smaller outer diameter than the attachment portion. The valve device according to any one of claims 19 to 32, wherein the valve device is provided.

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