Holding member for liquid storage container, liquid ejection head, and printer

A holding member for a liquid storage container includes: a mounting portion for removably mounting the liquid storage container through an opening along a predetermined direction; and a locking member for locking the mounted liquid storage container to the mounting portion by being fitted to the liquid storage container, wherein the mounting portion has a regulating portion for regulating inclination of a posture of the liquid storage container relative to the predetermined direction at the time of mounting the liquid storage container, the regulating portion being a portion provided such that a space between an inner surface of the mounting portion and an outer surface facing thereto of the liquid storage container is partially narrowed along a direction of insertion.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a printer performing printing by applying a liquid on a medium, and more specifically to a holding member for a liquid storage container for removably mounting the liquid storage container which supplies the liquid to be applied.

2. Description of the Related Art

A printer which has a holding member for removably mounting a liquid storage container and which performs printing with a liquid supplied from the liquid storage container mounted on the holding member has been known.

Japanese Patent Laid-Open No. 2008-110577, for example, discloses a holding member for a liquid storage container for use in a liquid ejection head for applying a liquid on a medium. As a liquid supply mechanism, the holding member and the liquid storage container have a liquid supply needle which is to be inserted into the liquid storage container and a liquid supply port into which the liquid supply needle is inserted, respectively. Through the liquid supply needle of the holding member inserted into the liquid supply port of the liquid storage container, the liquid is supplied to the liquid ejection head. Inserting the liquid storage container into an interior space of the holding member to engage both the liquid supply mechanisms with each other at a locking position enables the supply of the liquid. The holding member has a locking member, for example, in a shape of a nail, so as to lock the liquid storage container at the locking position, and the liquid storage container has a complementary locking mechanism such as an engagement member, for example, in a shape of a recess, which engages with the locking member.

SUMMARY OF THE INVENTION

The inner dimension of the holding member into which the liquid storage container is inserted is formed to be larger than the outer dimension of the liquid storage container, which creates a space between an outer surface of the liquid storage container and an inner surface facing thereto of the holding member. Depending on a direction of pressing at the time of insertion of the liquid storage container into an interior of the holding member, the liquid storage container can be inserted with inclination relative to an intended direction of insertion and bumps into an inner wall of the holding member with a posture which does not allow the locking mechanisms to engage with each other, thus occasionally failing to be mounted.

An object of the present invention is to provide a holding member for a liquid storage container, in which mounting of the liquid storage container can be performed by surely inserting the liquid storage container to the locking position irrespective of the direction of pressing at the time of insertion, and a liquid ejection head and a printer which use the holding member.

A holding member for a liquid storage container of the present invention for achieving the above object includes: a mounting portion for removably mounting the liquid storage container through an opening along a predetermined direction; and a locking member for locking the mounted liquid storage container to the mounting portion by being fitted to the liquid storage container, wherein the mounting portion has a regulating portion for regulating inclination of a posture of the liquid storage container relative to the predetermined direction at the time of mounting the liquid storage container, the regulating portion being a portion provided such that a space between an inner surface of the mounting portion and an outer surface facing thereto of the liquid storage container is partially narrowed along a direction of insertion.

According to the present invention, mounting of the liquid storage container can be performed by surely inserting the liquid storage container to the locking position irrespective of the direction of pressing at the time of insertion.

DESCRIPTION OF THE EMBODIMENTS

An embodiment of the present invention will be described below with reference to the attached drawings. In the drawings, the same constituent elements are denoted by the same reference numerals and overlapping explanations are omitted.

FIG. 6is a schematic perspective view showing an example of a printer according to an embodiment of the present invention. In this example, a printer100adopts an ink jet system in which printing is performed by ejecting a liquid such as ink through a nozzle unit of a liquid ejection head (hereinafter also referred to simply as a head)101.

The printer100has a guide rail110and a carriage120which performs scanning along the guide rail110in a direction indicated by an arrow X (a direction X) in the drawing. The carriage120is mounted with the head101such that the nozzle unit faces a medium on which printing is performed. The printer100ejects, from the head101, a liquid such as ink in a direction (a direction −Z) opposite to a direction (a direction Z) indicated by an arrow Z while causing the carriage120to perform scanning, thereby applying the liquid on the medium which faces the head101. The medium is conveyed, by a conveyance unit (not shown), in a conveyance direction (a direction Y) indicated by an arrow Y in the drawing. The application of the liquid on the medium and conveyance of the medium are appropriately performed so as to print an image on the medium.

FIG. 1Ais a schematic perspective view of the liquid ejection head according to the embodiment of the present invention andFIG. 1Bis an enlarged view of a portion indicated by a square Ib enclosed with a dashed line inFIG. 1A. The liquid ejection head (hereinafter also referred to simply as the head)101according to the present embodiment adopts the ink jet system and has a nozzle unit102for ejecting a liquid and a holding member (a mounting portion)104for holding a liquid storage container which stores the liquid to be ejected.

The head101ejects, through the nozzle unit102in which apertures of nozzles are arranged, a liquid such as ink onto a medium such as paper which is positioned facing the nozzle unit102to apply the liquid and print an image on the medium.

The holding member104has an opening and interior space for insertion of the liquid storage container. In the interior space of the holding member104, the liquid storage container which stores the liquid to be supplied to the nozzle unit102is removably mounted along a predetermined direction. The holding member104has a locking member103for locking the mounted liquid storage container at a locking position by performing, for example, fitting, and a regulating portion107for regulating a posture of the liquid storage container at the time of insertion of the liquid storage container to the locking position.

FIG. 2is a perspective view showing an example of the liquid storage container removably mounted on the holding member104of the liquid ejection head101according to the embodiment of the present invention. A liquid storage container201is substantially in a cuboid shape, one of the sides thereof having a recess202which creates a locking state by engaging with the locking member103at the locking position, once the liquid storage container201is inserted into the holding member104. The liquid storage container201is inserted through the opening of the holding member104in a direction indicated by an arrow A in the drawing to be mounted on the interior space of the holding member104.

FIGS. 3A to 3CandFIG. 4are schematic cross-sectional views explaining mounting of the liquid storage container201on the holding member104according to the embodiment of the present invention.

FIG. 3Ashows a state in which the liquid storage container201is mounted on the holding member104according to the embodiment of the present invention.

The holding member104has a biasing member106which biases the inserted liquid storage container201toward a direction (a direction −A) opposite to a direction of insertion (a direction A) indicated by an arrow A. The biasing member106may be, for example, a coil spring.

In the process of mounting, once the liquid storage container201is being inserted in the direction A to reach around the locking position, the locking member103falls down into the recess202of the liquid storage container201, thereby bringing the locking member103and the recess202into a loose-fit state. The liquid storage container201is biased, by the biasing member106, toward the direction (the direction −A) opposite to the direction of insertion, and whereby the recess202of the liquid storage container201and the locking member103, which are in the loose-fit state, are brought into abutment with each other to be locked so as to maintain the state of mounting. It should be noted that a position of the locking member103at this time is called a lock position, while a position of the locking member103in a state in which the liquid storage container201is insertable into and removable from the holding member104is called a lock releasing position. The locking member103may be manually moved from the lock position to the lock releasing position.

The head101has a liquid supply needle105on an inner surface on a rear side in the holding member104in the direction of insertion (the direction A) of the liquid storage container201. At the locking position, the liquid supply needle105is inserted into a liquid supply port of the liquid storage container201so as to be capable of being in fluid communication and supplies the liquid in the liquid storage container201into the head101. The liquid supplied into the head101is led to the nozzle unit102to be ejected through the nozzle unit102in accordance with an electrical signal.

FIG. 3Bshows a state in the middle of mounting the liquid storage container201on the holding member104according to the embodiment of the present invention.

The liquid storage container201is inserted, through the opening of the holding member104, into the interior space of the holding member104. The holding member104is provided with the locking member103, in such a manner as to project inwardly, on the side of a surface (an inner wall) thereof facing a surface with the recess of the liquid storage container201to be inserted and the interior of the holding member104is provided with the regulating portion107on a surface (a bottom surface of the inner wall) thereof opposite to the surface (an upper surface of the inner wall) thereof on the side of which the locking member103is provided. The regulating portion107is preferably provided on a surface (the inner wall) of the holding member104, the surface facing a lower surface of the liquid storage container201in the gravity direction in the posture in use. In a case where the liquid storage container201is inserted into the interior space of the holding member104, the inner wall of the holding member104and the regulating portion107provided thereon regulate the posture of the liquid storage container201.

FIG. 3Cshows a state in which the liquid storage container201is mounted with inclination relative to the holding member104according to the embodiment of the present invention.

The regulating portion107of the holding member104according to the present embodiment regulates the posture of the liquid storage container201during the process of inserting the liquid storage container201into the holding member, that is, more specifically, an inclination angle of the posture relative to the direction of insertion (the direction A). As shown inFIG. 3C, by regulating the inclination angle to be smaller, even if the liquid storage container201is in an inclined posture, the liquid storage container201can be inserted to the locking position before contacting the inner wall of the holding member104on the rear side in the direction of insertion.

With reference toFIG. 5, the effects of the present invention will be explained understandably.FIG. 5shows a liquid ejection head501of an example of prior art. Since a holding member504of a liquid ejection head501of the example of prior art does not have the regulating portion107, in a case where the posture of the liquid storage container201is inclined relative to the direction of insertion (the direction A) by pressing at the time of insertion, the inclination may become relatively larger as compared to that of the embodiment of the present invention. In a case where the inclination is large, even if the liquid storage container201reaches an inner wall on a rear side in the holding member504by pressing, the liquid storage container201cannot reach a position where the locking member103can be fitted to the recess202, and creates a state in which the locking member103cannot be fitted to the recess202. Meanwhile, in the embodiment of the present invention, by having the regulating portion107for regulating the posture of the liquid storage container201during the process of insertion, such a state can be avoided.

With reference toFIG. 4, a configuration according to the embodiment of the present invention and exemplary modifications thereof will be described in detail.

As described above, the regulating portion107of the present invention regulates, during the process of inserting the liquid storage container201into the holding member104, the posture of the liquid storage container201such that the inclination angle relative to the direction of insertion becomes small. For such a purpose, the regulating portion107is provided as a portion projecting inwardly in the interior space of the holding member into which the liquid storage container is inserted so as to reduce partially, along the direction of insertion, the space between an outer surface of the liquid storage container201and an inner surface of the holding member104facing thereto. In other words, the regulating portion107is provided such that the cross-sectional area of the interior space through which the liquid storage container passes is smaller than the area of an opening face of the opening of the holding member104in a region where the regulating portion107is located.

As shown inFIG. 4, the regulating portion107according to the embodiment of the present invention is provided on a near side of the locking member103in the direction of insertion (the direction A). Further, the regulating portion107is provided as a projection having a highest projecting portion in a region between the opening face of the opening of the holding member104and the inner wall on the rear side, in the direction of insertion, in the holding member104.

For preventing the insertion of the liquid storage container201from being interrupted by being caught at the time of insertion, the highest projecting portion of the regulating portion107is located on a rear side than the opening face of the opening of the holding member104. The regulating portion107is preferably formed in a slope in which the height thereof gradually increases toward the direction of insertion, from an opening face side thereof to the highest projecting portion in an area where the regulating portion107is located.

Further, for securing the easiness of insertion of the liquid storage container201during the process of insertion, the regulating portion107of the present invention is preferably provided in a form such that an area contacting the liquid storage container201to be inserted is as small as possible to reduce the sliding resistance.

More specifically, the highest projecting portion of the regulating portion107of the present invention is preferably partially provided in a direction crossing the direction of insertion (the direction A). For instance, one regulating portion107may be provided as a portion having a geometry such as a slit, groove, or dot on the surface thereof. Also, a plurality of regulating portions107may be provided by arranging the regulating portions in such a form as a platform and a rib. Specifically, as shown inFIGS. 1A and 1B, the regulating portion107according to the present embodiment is provided as one or two projections for each of the liquid storage containers in the direction crossing the direction of insertion (the direction A).

In other words, the regulating portion107of the present invention may be provided in such a manner as to project within the width of the liquid storage container in the direction crossing the direction of insertion (the direction A) in the area where the regulating portion is located. In this case, the regulating portion107may be provided partially on a center portion within the width of the liquid storage container, thereby suppressing the resistance at the time of mounting. Further, the regulating portion107may also be plurally provided within the width of the liquid storage container and the plurality of regulating portions107may be provided in positions symmetrically in the width direction of the liquid storage container. In the present invention, the number of the regulating portions107and the number of the highest projecting portions of the regulating portion107are not limited.

Moreover, the highest projecting portion of the regulating portion107of the present invention may be continuously or discontinuously provided through to the rear side in the direction of insertion of the holding member104with respect to the direction of insertion (the direction A). That is, an embodiment in which the highest projecting portion of the regulating portion107extends (for example, a platform shape, a rib shape, and the like) within a region Y shown inFIG. 4may be possible.

However, in the present invention, the highest projecting portion of the regulating portion107is preferably provided partially in the direction of insertion (the direction A). Specifically, in the embodiment shown inFIG. 4, for example, the regulating portion107is provided as a projection partially projecting. Therefore, with respect to the direction of insertion (the direction A), a portion on the rear side (the region Y) relative to the highest projecting portion of the regulating portion107as well as a portion on the near side (a region X) relative to the regulating portion107has the larger cross-sectional area of the interior space through which the liquid storage container passes as compared to the cross-sectional area of the area where the regulating portion107is located.

According to the embodiment in which the regulating portion107is formed in such a projection shape, since the regulating portion107less contacts the liquid storage container201in the direction of insertion, a phenomenon in which the motion of the liquid storage container201is regulated to be small due to a reduced space between the liquid storage container201and the holding member104is suppressed.

More advantageously, the regulating portion partially projecting allows the direction of insertion of the liquid storage container201to be altered in the middle of insertion. That is, the liquid storage container201contacts the highest projecting portion of the regulating portion107and can vary, having the contact point as a support point, the inclination of the posture relative to the original direction of insertion. The liquid storage container201can be inserted while the inclination of the posture thereof relative to the holding member104is finely adjusted, and thus can easily reach the locking position where the locking member103can be fitted to the recess202.

As described above, according to the configuration of the present invention, the inclination of the posture of the liquid storage container201relative to the direction of insertion can be reduced during the process of insertion, and whereby even in a case where the inner dimension of the holding member is made relatively larger than the outer dimension of the liquid storage container for easier mounting, the angle of insertion of the liquid storage container can be regulated, thereby enabling the mounting of the liquid storage container with accuracy. Further, before the liquid storage container201bumps into the rear end of the holding member104, the locking member103can be fitted to the recess202.

Therefore, according to the present invention, mounting of the liquid storage container can be performed by surely inserting the liquid storage container to the locking position irrespective of the direction of pressing at the time of insertion.

This application claims the benefit of Japanese Patent Application No. 2014-170353 filed on Aug. 25, 2014, which is hereby incorporated by reference herein in its entirety.