JP2007313733A - Pressurized type liquid container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressurized type liquid container which enables smooth discharge of a liquid such as ink, a correcting fluid or paste and can be manufactured at low cost. <P>SOLUTION: In the pressurized type liquid container, a follower 6 which is made to advance inside a liquid holding tube 3 toward the front end part side by a pressurizing force applied by a pressurizing pump mechanism 9 is provided in an airtight state on the inner peripheral surface of the liquid holding tube 3, while the pressurizing pump mechanism 9 is constituted of a pressurizing chamber 14 which is divided from the inside of a liquid holding chamber by the follower 6, an O ring 18 which is disposed so that it can be pressed into the pressurizing chamber 14, a compression spring 16 which urges the O ring 18 in the direction of leaving the inside of the pressurizing chamber 14, and a pressing rod 12 which presses and moves the O ring 18 forward against the urging force of the compression spring 16. By this pressing motion, the inside of the pressurizing chamber 14 is pressurized and the follower 6 is made to advance. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a container for liquids such as ballpoint pens, correction pens, glue application pens, etc., and liquid containers such as cosmetics, clothing, and foods, and in particular, discharge of liquids such as ink, correction liquids, and glues during use. The present invention relates to a pressurized liquid container that can be made smoothly.

  Conventionally, for example, when using a ballpoint pen, ink may not come out smoothly from the pen tip of the pen refill unit, or ink may run out during writing, and each time the pen tip is rubbed on the paper surface several times. In many cases, the ink must be discharged (see, for example, Patent Documents 1 and 2).

On the other hand, as disclosed in Patent Documents 1 and 2, conventionally, the pen refill unit of the ballpoint pen is provided with a pressure pump mechanism, and the ink filled with ink during use by operating the pressure pump mechanism. It has been proposed to eliminate the above-described problems by pressurizing the inside of the housing tube.
JP 2004-268567 A JP 2004-268567 A

  However, in the above-described conventional ballpoint pens, in any of the patent documents, after the inside of the ink containing tube of the pen refill unit is pressurized by the pressurizing pump mechanism, the inside of the ink containing tube is always maintained as it is. If the pressure pump mechanism is repeatedly operated in this state, the inside of the ink containing tube is over-pressurized, ink leakage is likely to occur, and the ball-point pen shaft, and further, hands and clothes may be soiled. There is. In addition, in order to keep the airtight state in the ink containing tube high, there are problems such as high material costs and processing accuracy of the seal parts, and high costs. This is not limited to the ballpoint pen, and the same problem is expected for similar correction pens, stationery such as glue application pens, and liquid containers such as cosmetics, clothing, and food.

  An object of the present invention is to provide a pressurized liquid container that can smoothly discharge liquids such as ink, correction liquid, and glue and can be manufactured at low cost.

According to the present invention, the above problem is solved as follows.
(1) A cartridge including a liquid storage tube having a liquid discharge port portion at the front end is loaded in the shaft cylinder, and a liquid storage chamber in the liquid storage tube of this cartridge is added from the rear end side of the liquid storage tube. Pressure is applied by the pressure pump mechanism, the liquid stored in the liquid storage chamber is sent to the front end portion side of the liquid storage tube, and the liquid sent to the front end portion is discharged to the outside through the liquid discharge port portion. In the pressurized liquid container, a follower that advances toward the front end portion in the liquid storage tube with the pressure generated by the pressurization pump mechanism is disposed on the rear surface of the liquid storage tube on the inner peripheral surface of the liquid storage tube. The surface is in close contact with the liquid storage tube and is provided in an almost airtight state, and the pressurization pump mechanism can be press-fitted into the pressurization chamber defined by the follower and the liquid storage chamber. Placed in And a biasing means for biasing the elastic deformable body in a direction in which the elastic deformable body is removed from the pressurizing chamber, and the elastic deformable body is pushed forward and moved against the biasing force of the biasing means, By pressing the elastic chamber against the urging force of the urging means by the pressing means into the pressure chamber by pressurizing the pressure chamber. While moving forward toward the front end side of the liquid storage tube, the elastic deformation body is separated from the pressurizing chamber by the urging force of the urging means by the pushing-in release operation of the pressing means, and the pressurized chamber is separated from the outside air. Let the air vent state.

(2) In the above item (1), a partition wall defining the pressurizing chamber into a pressurizing chamber inside the cartridge and a pressurizing chamber outside the cartridge is provided in the middle of the pressurizing chamber, A vent hole that communicates with the pressurizing chamber inside the cartridge and the pressurizing chamber outside the cartridge and that penetrates in the front-rear direction is provided, and the vent from the pressurizing chamber outside the cartridge passes through the vent on the front end side of the pressing means. A working valve having a valve portion that protrudes toward the pressure chamber inside the cartridge, protrudes toward the pressure chamber inside the cartridge, closes the vent hole at the tip, and disconnects the pressure chamber inside the cartridge from the pressure chamber outside the cartridge. When the pressing means is pushed and released, the valve portion closes the vent hole before the elastic deformation body is detached from the pressurizing chamber.

(3) In the above item (2), a recess recessed toward the front end side that allows the valve portion of the working valve to enter is provided at the rear end portion of the follower.

(4) In any one of the above items (1) to (3), the elastic deformation body is formed by an O-ring provided on the outer periphery of the front end portion of the pressing means.

(5) In any one of the above items (1) to (4), a holding mechanism is provided that holds the pressing means so as to be releasable at the pushing operation position.

(6) In the above item (5), a cap for protecting the liquid discharge port of the cartridge is detachably attached to the front end portion of the shaft cylinder, and the cap is attached to the rear end portion of the shaft cylinder in use. Thus, in the state where the pressing means is pushed in, the holding mechanism can be released to maintain the pressure chamber in the pressurized state, and when the cap is removed from the rear end, the pushing means is released. To be made.

According to the present invention, the following effects can be obtained.
According to the first aspect of the present invention, the pressurizing chamber in the cartridge is brought into a pressurizing state by a single pushing operation by the pressing means, and the follower defining the pressurizing chamber is disposed in the liquid storage tube. Since the outer peripheral surface is brought into close contact with the peripheral surface, the liquid can be fed to the front end side of the cartridge, that is, the supply side as the follower advances, and the liquid can be supplied smoothly. In addition, the tip of the pressurized liquid container can be easily used in an upward state. Furthermore, since an elastic deformation body is used, processing accuracy is not so required, and it can be manufactured at low cost.

  According to the second aspect of the present invention, when the pressing means is pushed and released, the valve portion closes the vent hole, and the pressurizing chamber in the cartridge can be substantially maintained in the current pressurizing state. This is effective for preventing the liquid from running out when the liquid discharge port portion is used in an upward state.

  According to the third aspect of the present invention, the valve portion of the working valve that moves to the front end side in conjunction with the pressing operation of the pressing means is caused to enter the recess provided at the rear end portion of the follower to escape. Therefore, the follower movement start position can be moved to the rear end side, and the space of the liquid storage chamber in the liquid storage tube can be increased. This is effective in reducing the length of the container in the front-rear direction or securing a large amount of liquid.

  According to the invention described in claim 4, since the elastic deformation body is an O-ring provided on the outer periphery of the front end portion of the pressing means, it is uniformly elastically deformed during pressurization and is press-fitted into the pressurization chamber. Pressurization is performed.

  According to the fifth aspect of the present invention, when the pressing means is pushed to the pushing operation position, the pushing means is held at the pushing position, and the pressurized chamber can be maintained in the pressurized state. This is effective in preventing the liquid from running out when used in this state.

  According to the invention described in claim 6, when the container is used, the pressurized state can be easily maintained by simply attaching the cap to the rear end portion of the shaft cylinder. In particular, it is effective for preventing the liquid from running out when the liquid discharge port portion is used in an upward state. Further, when the cap is removed from the rear end, the pressing means is automatically returned to the position before being pushed in, so that the operation is smoothly performed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a front view of the pressurized liquid container according to the present invention with the cap removed and shown in a non-pressurized state, FIG. 2 is a cross-sectional front view of the pressurized liquid container shown in a non-pressurized state, and FIG. 2 is an enlarged perspective view of the main part of FIG. 2, FIG. 6 is a sectional front view of the pressurized liquid container shown in a pressurized state, and FIG. FIG. 8 is an enlarged perspective view of the main part of FIG. In the figure, the “left side” is the front and the “right side” is the rear with respect to the page.

  As shown in FIGS. 1 to 3, 6, and 7, the correction liquid application pen of this embodiment includes a shaft cylinder (1) and a cartridge that is screwed into the shaft cylinder (1) in a replaceable manner. (2)

  The cartridge (2) has a cylindrical liquid storage tube (3) filled with a correction liquid (W) as a correction medium, and a head chip (4) on the front end (3a) of the liquid storage tube (3). And a discharge core member (5) mounted through the. The front end (3a) of the liquid storage tube (3) is provided with an opening (3b) communicating with the liquid storage tube (3). The rear end opening (3c) side of the liquid storage tube (3) is closed by a follower (6). A cap (7) is attached to the head chip (4) to protect the front end of the head chip (4) when not in use.

  The follower (6) has a cylindrical cap shape in which the front end face (6a) is closed and the rear end face (6b) is provided with a recess (6c) that is recessed toward the front end face (6a). In the liquid storage tube (3) in which (W) is placed, the outer peripheral surface is brought into contact with the inner peripheral surface of the liquid storage tube (3) so as to be almost airtight and from the rear end opening (3b) side. A liquid storage chamber (8) which is arranged so as to be movable toward the front end (3a) side and in which correction liquid (W) is stored between the front end (3a) in the liquid storage tube (3). Is defined.

  The head chip (4) is a cylindrical cap-shaped member that is formed in a tapered shape with the front end portion narrowed and provided with an opening (4a) at the front end portion. The head chip (4) is attached by screwing the inner peripheral surface threaded portion to the outer peripheral surface threaded portion of the front end (3a) of the liquid accommodating tube (3), and the opening ( 3b) and the opening (4a) of the head chip (4) hold both ends (5a) and (5b) of the discharge core member (5) so as to be movable in the front-rear direction.

  The discharge core member (5) is provided with a flange (5c) at the front and rear intermediate portions. A compression spring (5d) is interposed between the flange (5c) and the liquid storage tube (3), and the front end (5a) of the discharge core member (5) is urged by the urging force of the compression spring (5d). A part is held in the head chip (4) in a state of protruding forward from the head chip (4) through the opening (4a).

  A pressure pump mechanism (9) is incorporated in the rear end (1a) of the shaft tube (1). The pressurizing pump mechanism (9) includes a cylindrical holder (10) fixed by screwing the outer peripheral surface screw portion into the inner peripheral surface screw portion of the rear end opening (1a) of the shaft tube (1). The outer peripheral surface threaded portion is screwed to the inner peripheral surface threaded portion of the front end opening portion (10a) of the holder (10) and fixed to the front end open portion (10a) of the holder (10), and the front end of the holder (10) is opened. The guide bush (11) disposed in the rear end opening (1a) of the shaft tube (1) together with the portion (10a), and the pressing means held by the holder (10) and the guide bush (11) The pressing rod (12) is provided.

  The holder (10) has a rear end portion (10b) protruding rearward from the rear end portion of the shaft tube (1). The outer diameter of the rear end portion (10b) of the holder (10) is substantially equal to the inner diameter of the cap (7), and the cap (7) can be crowned on the rear end portion (10b). .

  The guide bush (11) has a cylindrical cap shape with the front surface as the partition wall portion (11a) closed and the rear end surface opened, and a vent hole (13 in the center portion of the partition wall portion (11a) is opened in the front-rear direction. ) Is provided. The partition wall (11a) defines the pressurizing chamber (14) into a cartridge outer pressurizing chamber (14a) and a cartridge inner pressurizing chamber (14b). On the other hand, the inside of the guide bush (11) is gradually increased in diameter from the partition wall portion (11a) toward the rear end surface side, and an outside air communication portion (15) is provided in addition to the cartridge outer pressure chamber portion (14a). It has been.

  In the guide bush (11), a pressurizing portion (12a) of the pressing rod (12) and a compression spring (16) as an urging means are disposed, and the compression spring (16) 12) is biased backwards. At the front end of the pressurizing portion (12a) of the pressing rod (12), there is a working valve (17) inserted through the vent hole (13) from the front of the partition wall portion (11a) of the guide bush (11). One end portion side is screwed and connected, and is attached in a state of projecting forward from the front end portion of the pressurizing action portion (12a). A valve portion (17a) is provided at the front end portion of the working valve (17). When the pressing rod (12) is moved forward, the valve portion (17a) is separated from the partition wall portion (11a), and the vent hole (13) is released to pressurize the cartridge outside pressure chamber (14a) and the cartridge. When the chamber (14b) is communicated and the pressing rod (12) is moved rearward, it comes into contact with the partition wall (11a), closes the vent hole (13), and pressurizes the cartridge outside pressure chamber (14a). And the pressurizing chamber (14b) in the cartridge are disconnected. 2, 3, 6, and 7, the outer diameter of the valve portion (17 a) is smaller than the inner diameter of the concave portion (6 c) of the follower (6). When moving forward together with 12), the valve portion (17a) is inserted into the recess (6c) to absorb the movement of the valve body (17a) relative to the follower (6). This is advantageous in reducing the length of the container in the front-rear direction or securing a large amount of liquid.

  An O-ring (18), which is an elastic deformable body, is mounted on the outer peripheral surface of the front end portion of the pressurizing action portion (12a). The O-ring (18) is made of an easily deformable material such as silicon rubber or butyl rubber having gas barrier properties. The diameter of the O-ring (18) is slightly larger than the inner diameter of the cartridge outer pressure chamber (14a) and smaller than the inner diameter of the outside air communication section (15), and is elastically deformed in the cartridge outer pressure chamber (14a). It can be press-fitted in an airtight state.

  A holding mechanism (19) is incorporated at the rear ends of the holder (10) and the pressing rod (12). The holding mechanism (19) holds the pressing rod (12) so as to be releasable at the push-in operation position.The holding mechanism (19) is arranged on the outer peripheral surface of the rear end (10b) of the holder (10) from the outer peripheral surface. The engagement groove (20) provided penetrating to the peripheral surface, and the locking piece (21) provided on the outer peripheral surface of the pressing rod (12) inserted and arranged in the holder (10) It is configured.

  As shown in detail in FIG. 4, the engagement groove (20) has a narrow engagement groove (20 a) that is narrow in the circumferential direction, and a narrow width in the front and rear portions of the narrow engagement groove (20 a). The wide engaging grooves (20b) and (20c) communicated with the engaging groove (20a) and provided with a width larger than the width of the narrow engaging groove (20a).

  On the other hand, as shown in detail in FIG. 4 and FIG. 5, the locking piece (21) is fixed at the rear end side by a slit (22) provided on the outer peripheral surface of the pressing rod (12). The side is formed as an elastic piece that can swing in the vertical direction, that is, the inner and outer peripheral directions. The locking piece (21) corresponds to the narrow engagement groove (20a) at the tip, and the unlocking protrusion (21a) protrudes toward the outer periphery and the wide engagement groove (20b). Corresponding to the above, a locking projection (21b) is also formed which protrudes toward the outer periphery. Further, the protrusion height of the unlocking protrusion (21a) is larger than the protrusion height of the locking protrusion (21b), and the pressing bar (12) is disposed in the holder (10), and the unlocking protrusion In a state in which (21a) is disposed in the narrow engagement groove (20a), as shown in FIGS. 2 to 4, the unlocking projection (21a) is located on the outer periphery from the outer peripheral surface of the holder (10). It is arrange | positioned so that it may protrude greatly toward.

  When the unlocking protrusion (21a) protrudes outward from the outer peripheral surface of the holder (10), the locking protrusion (21b) is in the wide engagement groove (20b) (20c). On the other hand, when the unlocking projection (21a) is pushed inward to a position that is at least substantially flush with the outer peripheral surface of the holder (10), the locking projection (21b) is ) Is set to be moved to a position where it is not engaged with the wide engagement grooves (20b) and (20c). In addition, a guide surface (23) is formed at the upper rear end of the unlocking projection (21a), and is inclined obliquely upward toward the rear.The upper front end of the locking projection (21b) A guide surface (24) that is inclined obliquely upward is formed.

  Next, operations of the pressure pump mechanism (9) and the holding mechanism (19) in the present embodiment will be described. As shown in FIGS. 2 and 3, when the correction pen is not used, the pressing rod (12) causes the valve portion (17 a) of the working valve (17) to be vented by the urging force of the compression spring (16). 13) is closed, and the O-ring (18) on the pressurizing portion (12a) is detached from the cartridge external pressurizing chamber (14a) and moved to a position where it is disposed in the external air vent (15). . The pressure chamber outside the cartridge (14a), the outside air ventilation section (15), and the vent hole (25) of the holder (10) are in a state of ventilation with the outside air, while the pressure chamber in the cartridge (14b) is in a pressure holding state. It has become. As a result, the follower (6) maintains the current position and prevents the liquid from running out when the opening (4a), which is the liquid discharge port, is used in an upward state. 2 and 3, the holding mechanism (19) is in a state in which the locking projection (21b) of the locking piece (21) is engaged in the rear wide engagement groove (20c). It is in.

  On the other hand, as shown in FIGS. 6 to 8, when the correction pen is used, when the pressing rod (12) is pushed forward against the urging force of the compression spring (16), the action valve (17) The valve portion (17a) opens the vent hole (13) and moves so that the O-ring (18) on the pressurizing action portion (12a) is disposed in the pressurizing chamber outside the cartridge (14a). At this time, the O-ring (18) is press-fitted into the pressure chamber (14a) outside the cartridge while being elastically deformed so that the entire pressure chamber (14) is hermetically sealed and the O-ring (18) is moved in accordance with the moving width. Thus, the air in the external pressure chamber (14a) is pressure-fed into the internal pressure chamber (14b) through the vent hole (13). As a result, the inside of the pressurizing chamber (14b) in the cartridge is pressurized, and accordingly, the follower (6) moves forward in the liquid storage tube (3), and the inside of the liquid storage chamber (8). The pressurization efficiency can be increased.

  Further, as shown in FIG. 4, the holding mechanism (19) is configured such that the pressing rod (12) is pushed forward and the guide surface (24) abuts the front end edge of the rear wide engagement groove (20c). Then, the locking piece (21) is elastically deformed inward to release the lock, and can further move forward. When the locking protrusion (21b) corresponds to the front wide engagement groove (20b), as shown in FIGS. 6 to 8, it is engaged and locked in the front wide engagement groove (20b). The pressure state at that time is maintained in the inner pressure chamber (14b). As a result, the correction ink (W) can be supplied smoothly.

  Further, when the use of the correction pen is finished, when the unlocking projection (21a) of the locking piece (21) is pushed inward, the locking projection (21b) is detached from the front wide engagement groove (20b), Due to the urging force of the compression spring (16), the pressing rod (12) faces rearward, and the locking projection (21b) of the locking piece (21) is engaged in the rear wide engagement groove (20c). It is moved until In the movement of the pressing rod (12), the valve portion (17a) of the working valve (17) first closes the vent hole (13), and then the O-ring (18) on the pressure acting portion (12a) is moved into the cartridge. It is set so as to be separated from the external pressurizing chamber (14a) and disposed in the external air vent (15). As a result, the follower (6) maintains the current position. In this way, the inside of the liquid storage tube (3) is pressurized by one press by the pressing rod (12) and the opening operation thereof, the state is maintained, and then the state is almost maintained and the next pressurization is performed. Therefore, it is possible to always supply the correction ink (W) smoothly. In particular, when the opening (4a), which is the liquid discharge port, is used in the upward state, it is prevented from running out of liquid. It is effective to do.

  Next, when the correction pen is not used, when the correction pen is used, the cap (7) attached to the head chip (4) is removed, and the removed cap (7) is attached to FIGS. 6 and 7. As indicated by the dotted line, it is attached to the rear end (10b) of the holder (10). At the time of crowning, when the front surface of the cap 7 comes into contact with the guide surface (23) of the unlocking projection (21a), the locking piece (21) is pushed inward and elastically displaced to unlock. . Further, when the lock rod 12 is pushed forward together with the cap 7 in the unlocked state and pushed to a predetermined position, although not shown, the cap 7 and the holder 10 ) Is detent locked and the state is maintained.

  On the other hand, when the use is finished and the cap (7) is pulled out from the holder (10) and removed from the rear end (10b) of the holder (10), the pressing rod (12) in the unlocked state is released. The urging force of the compression spring 16 is pushed back to the state shown in FIGS. Therefore, in the case of using the cap (7), the push rod (12) can be pushed once and opened by the attaching / detaching operation of the cap (7), and the operation is simplified.

  In the pressurized liquid container according to the present embodiment, when the correction liquid (W) in the liquid storage tube (3) runs out, if only the cartridge (2) is replaced, the shaft cylinder (1), the pressure pump The mechanism (9), the holding mechanism (19) and the like can be used repeatedly as they are.

It is a front view which removes the cap of the container for pressurized liquids concerning the embodiment of the present invention, and shows it in the non-pressurized state. Similarly, it is a cross-sectional front view of a pressurized liquid container shown in a non-pressurized state. FIG. 3 is an enlarged view of a main part of FIG. 2. It is a principal part expansion perspective view of FIG. Similarly, it is a principal part expansion perspective view of FIG. It is a section front view of a pressurization type liquid container same as the above shown in a pressurization state. It is a principal part enlarged view of FIG. It is a principal part expansion perspective view of FIG.

Explanation of symbols

(1) Shaft cylinder
(1a) Rear end opening
(2) Cartridge
(3) Liquid storage tube
(3a) Front end
(3b) Opening
(3c) Rear end
(4) Head chip
(4a) Opening
(5) Discharge core member
(5a) Front end
(5b) Rear end
(5c) Buttocks
(6d) Compression spring
(6) Follower
(6a) Front end face
(6b) Rear end face
(6c) Recess
(7) Cap
(8) Liquid storage chamber
(9) Pressure pump mechanism
(10) Holder
(10a) Front end opening
(11) Guide bush
(11a) Bulkhead
(12) Pressing bar
(12a) Pressurizing part
(13) Vent
(14) Pressurization chamber
(14a) Cartridge pressure chamber
(14b) Cartridge pressure chamber
(15) Outside air communication part
(16) Compression spring
(17) Working valve
(17a) Valve part
(18) O-ring
(19) Holding mechanism
(20) Engaging groove
(20a) Narrow engagement groove
(20b) Front wide engagement groove
(20c) Rear wide engagement groove
(21) Locking piece
(21a) Unlocking protrusion
(21b) Locking protrusion
(22) Slit
(23) Guide surface
(24) Guide surface
(25) Vent
(W) Correction fluid

Claims (6)

A cartridge including a liquid storage tube having a liquid discharge port portion at the front end is loaded in the shaft cylinder, and the liquid storage chamber in the liquid storage tube of the cartridge is connected to the pressure pump mechanism from the rear end side of the liquid storage tube. The pressurization method in which the liquid stored in the liquid storage chamber is sent to the front end side of the liquid storage tube, and the liquid sent to the front end is discharged to the outside through the liquid discharge port. In liquid containers,
A follower that advances toward the front end portion in the liquid storage tube with a pressure generated by a pressurizing pump mechanism is attached to the rear portion in the liquid storage tube, and the outer peripheral surface is brought into close contact with the inner peripheral surface of the liquid storage tube. While providing a substantially airtight space between the storage tubes,
The pressurizing pump mechanism includes a pressurizing chamber that is defined as a liquid storage chamber by a follower, an elastic deformable body that is press-fit into the pressurizing chamber, and a direction in which the elastic deformable body is detached from the pressurizing chamber. An urging means for urging, and a pressing means that pushes and moves the elastic deformation body forward against the urging force of the urging means and press-fits it in an airtight state in the pressure chamber;
While the pressurizing chamber is pressurized by the pushing operation of the elastic deformation body against the urging force of the urging means by the pressing means, the follower is advanced toward the front end side of the liquid containing tube. ,
The elastic deformation body is detached from the pressurizing chamber by the urging force of the urging means by the pushing and releasing operation of the pressing means, and the pressurizing chamber is brought into a ventilation state with the outside air. Pressure liquid container.   A partition wall defining a pressurizing chamber into a pressurizing chamber inside the cartridge and a pressurizing chamber outside the cartridge is provided in the middle of the pressurizing chamber. A vent hole communicating with the chamber portion and penetrating in the front-rear direction is provided, and the front end portion side of the pressing means protrudes from the pressure chamber portion outside the cartridge through the vent hole to the pressure chamber side inside the cartridge. A working valve is provided that protrudes toward the pressure chamber inside the cartridge and has a valve portion that closes the vent hole at the tip portion and cuts off the communication between the pressure chamber inside the cartridge and the pressure chamber outside the cartridge. 2. The pressurized liquid container according to claim 1, wherein when released, the valve portion closes the vent hole before the elastic deformable body is detached from the pressurizing chamber.   3. The pressurized liquid container according to claim 2, wherein a concave portion is provided at the rear end portion of the follower so as to allow the valve portion of the working valve to enter, and is recessed toward the front end portion side.   The pressurized liquid container according to any one of claims 1 to 3, wherein the elastic deformable body is formed of an O-ring provided on the outer periphery of the front end portion of the pressing means.   5. The pressurized liquid container according to any one of 1 to 4, further comprising a holding mechanism that holds the pressing means so as to be releasable at the pushing operation position. A cap that protects the liquid discharge port of the cartridge is detachably attached to the front end portion of the shaft tube, and the pressing means is pushed in by attaching the cap to the rear end portion of the shaft tube when in use. In this state, the holding mechanism can be released to maintain the pressurized chamber in a pressurized state, and when the cap is removed from the rear end, the pushing means is pushed and released. The pressurized liquid container according to claim 5.

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