초록 ▼

An ink cartridge includes an ink bag including two flexible sheets disposed to face each other, a plug, a case including a first wall portion and a second wall portion arranged in parallel, a third wall portion arranged perpendicularly with respect to the pair of wall portions, and a penetration por

An ink cartridge includes an ink bag including two flexible sheets disposed to face each other, a plug, a case including a first wall portion and a second wall portion arranged in parallel, a third wall portion arranged perpendicularly with respect to the pair of wall portions, and a penetration portion, the case housing the ink bag such that sheet surfaces of the two sheets respectively face the first wall portion and the second wall portion, and a pressing member including a curved portion toward the outside and a sheet having lower flexibility than that of the two sheets, wherein between the ink bag and the first wall portion, the pressing member is elastically deformed and a restoring force occurs by one section of the curved portion contacting with the first wall portion and another section of the curved portion contacting with one of the two sheets.

대표청구항 ▼

1. An ink cartridge comprising: an ink bag which is formed in a bag shape and which includes two layers of flexible sheets that are disposed to face each other, and which stores ink inside;a plug which is provided on the ink bag and which includes a hollow portion that leads from a first opening tha

1. An ink cartridge comprising: an ink bag which is formed in a bag shape and which includes two layers of flexible sheets that are disposed to face each other, and which stores ink inside;a plug which is provided on the ink bag and which includes a hollow portion that leads from a first opening that is communicatively connected with the ink bag to a second opening that opens to the outside;a case that is substantially box-shaped, and that includes a first wall portion and a second wall portion, which are a pair of wall portions whose longitudinal direction is an axial line of the plug and which are arranged substantially in parallel with the axial line,a third wall portion that is a wall portion arranged substantially perpendicularly with respect to an extending planar direction of the pair of wall portions and diagonally with respect to the axial line, anda penetration portion that is provided in the third wall portion such that the penetration portion faces the second opening of the plug, the case housing the ink bag such that sheet surfaces of the two layers of sheets respectively face the first wall portion and the second wall portion; anda pressing member that includes a curved portion, which is a surface portion formed by curving, toward an outer side, a sheet having lower flexibility than that of the two layers of sheets such that a one surface of the sheet is on an inner side, such that at least one end portion of the sheet faces the one surface, and such that an empty space is created on the inner side, whereininside the case; between the ink bag and the first wall portion, the pressing member is elastically deformed and a restoring force occurs in directions in which one section and another section are separated from each other by the one section of the curved portion being in contact with the first wall portion and the other section other than the one section of the curved portion being in contact with a first layer portion that is one of the two layers of sheets, and the empty space is positioned between the one section and the other section. 2. The ink cartridge according to claim 1, wherein the ink bag is arranged inside the case such that the axial line of the plug is positioned closer to a first end portion that is one end portion of the case in a direction that orthogonally intersects with the axial line,the pressing member includes a joint portion that is a portion formed by joining a pair of end portions of the sheet on the side of the one surface, anda curved end portion that is a curved end portion facing, the joint portion, andthe pressing member is arranged inside the case such that the joint portion is positioned On an opposite side to the first end portion with respect to the axial line, and such that the curved end portion is positioned closer to the first end portion than the axial line. 3. The ink cartridge according to claim 1, wherein the pressing member is arranged in a position that is separated from the plug in a direction of the axial line. 4. The ink, cartridge according to claim 1 , wherein when the ink bag deforms such that the two layers of sheets move closer to each other in the direction in which the first wall portion and the second wall portion face each other, the pressing member deforms such that a distance between the one section of the curved portion that is in contact with the first wall portion and the other section of the curved portion that is in contact with the first layer portion increases. 5. The ink cartridge according to claim 2, wherein the case includes, on the first end portion, a fourth wall portion that connects to the first wall portion and the second wall portion, andthe curved end portion is in contact with the fourth wall portion.