JP5046849B2 - Ink replaceable writing instrument - Google Patents

Description

  The present invention relates to an ink exchangeable writing instrument that includes a front shaft cylinder and a rear shaft cylinder, and writes the ink by installing a replaceable ink tank in the shaft cylinder, and more particularly, to simplify the mounting method of the replaceable ink tank. It relates to technology.

  In fountain pens and brush pens, a writing instrument is known in which a replaceable cartridge type ink tank is set and ink is supplied to the pen tip for writing. The ink tank is filled with ink such as black in a substantially cylindrical resin container having one open end, and a metal ball is fitted to the open end and sealed. When the pen is attached to the writing instrument, the metal ball is released from the open end by strongly pressing the open end, and rolls into the ink tank having a diameter larger than that of the metal ball.

  In another configuration, there is also a replaceable ink tank that is sealed with a breakable resin without using a metal sphere, and supplies the ink by breaking through the resin when mounted.

In any configuration, when a small ink tank is mounted on a writing instrument, it must be pressed with a certain amount of force, and thus there is a problem that it is difficult for a user with weak power to mount ink.
Further, when the ink tank is pressed by applying force, the resistance suddenly disappears immediately after the metal ball is detached, so that the ink tank may be pushed too much. As a result, the writing instrument may be damaged or it may be difficult to remove the ink tank.

  Patent Document 1 discloses a marker having a replenishment ink tank. The marker is composed of a shaft cylinder and an ink storage body, and the shaft cylinder includes a front side shaft and a rear side shaft. When the front shaft is rotated, the front shaft is gradually screwed into the rear shaft, and the ink replenishment tube attached to the ink reservoir breaks through the thin film covering the replenishment ink tank, and the ink in the replenishment ink tank Is configured to flow into the ink occlusion section through the ink replenishment tube.

  In this document, protrusions are provided at two locations, and the refill ink tank is not used at the first position, and the ink is refilled at the second position. The second position indicates that it is necessary to prepare a new marker so that the ink is not replenished due to a malfunction by stopping at the first position.

  This document uses screw screwing to break the covering of the replenishment ink tank provided in the pen in advance, but the replenishment tank is installed in advance in the writing instrument and is premised on replacement. Not. As a result, the thin film of the replenishing ink tank is literally a film that can be easily broken through, and the above-described problems do not occur. In addition, since the ink tank is not pushed directly by hand at the time of replacement, there is no problem that the ink tank is pushed too much.

JP 2006-224326 A

  The present invention has been created to solve the above-described problems that the prior art has not solved. When the replaceable ink tank is mounted, the replaceable ink tank can be easily mounted, and the replaceable ink tank can be set to a predetermined appropriate level. An object of the present invention is to provide a writing instrument that can be used in a position.

In order to solve the above problems, the present invention uses the following means.
The writing instrument according to claim 1 is provided with at least a front shaft cylinder having a pen tip at a front end and a rear shaft cylinder configured to be detachable from the front shaft cylinder, and a replaceable ink tank filled with ink inside. A writing instrument that is attached and supplies ink.
The writing instrument is arranged so that the ink supply port of the replaceable ink tank faces the end of the ink supply tube in the front shaft cylinder with the rear shaft cylinder detached and covers the replaceable ink tank. When the shaft cylinder is attached to the front shaft cylinder, the rear end portion of the replaceable ink tank and the position adjusting member provided at the inner surface rear end portion of the rear shaft cylinder abut.

  Accordingly, the ink supply port is pressed toward the ink supply tube as the rear shaft tube is mounted toward the front shaft tube. Furthermore, it has a structure in which the replaceable ink tank is also mounted at a predetermined position at the position where the rear barrel is completely mounted.

  According to a second aspect of the present invention, in the configuration in which the front shaft cylinder and the rear shaft cylinder are each provided with a thread groove, and both are screwed together, the first screwing starts from the state in which the rear shaft cylinder is detached. At the starting position, the rear end of the replaceable ink tank and the inner rear end of the rear barrel are displaceable without being pressed against each other. Therefore, screwing can be started in a state where there is no resistance from the replaceable ink tank.

Further, the rear end portion of the replaceable ink tank is brought into contact with the rear end portion of the inner surface of the rear shaft tube at the position after the initial rotation in which the rear shaft tube is rotated from the start position. The replaceable ink tank is gradually pressed as the shaft cylinder rotates. The replaceable ink tank is mounted at a predetermined position at the completion position when the screwing is completed.

  In the invention according to claim 3, the position after the initial rotation is obtained by rotating the rear barrel 10 degrees to 1080 degrees (3 rotations), more preferably 30 degrees to 360 degrees (1 rotation) from the starting position. It is a position.

  The invention according to claim 4 is characterized in that the position adjusting member is rotatable relative to the rear barrel about the axial direction.

Since the present invention is configured as described above, the following operational effects can be obtained.
According to the first aspect of the present invention, since the rear end of the inner surface of the rear barrel presses the replaceable ink tank, the user replaces the front barrel and the rear barrel by attaching the thicker front barrel and the rear barrel. A type ink tank can be installed. Even if the user is easy to apply force and weak, the ink tank can be easily replaced.

  At the same time, with the rear barrel fully installed, make sure that the replaceable ink tank is installed in the proper position, so that ink leaks due to insufficient push-in or writing instruments and replaceable ink tanks are damaged due to excessive push-in. Can be prevented. In addition, it can be removed by pulling with a predetermined force during replacement.

According to the second aspect of the present invention, the rear shaft tube can be screwed into the front shaft tube without any resistance from the replaceable ink tank, and the rotation is started to produce a certain degree of inertia. Thus, pressing of the replaceable ink tank can be started. Therefore, it is easy to turn, and the exchangeable ink tank can be gradually pressed by the rotational force.
By changing the rotational force to a force pushing in the axial direction, the replaceable ink tank can be mounted with a smaller force.

  According to the third aspect of the present invention, it is possible to set an appropriate rotation angle as the post-initial rotation position. That is, in the case of a relatively small rotation angle of about 10 to 180 degrees, the screwing can be started by slightly twisting with one hand, and the replacement ink tank can be started immediately. Further, by setting the angle to at least 10 degrees, preferably 30 degrees or more, it is possible to prevent the rear shaft cylinder from rotating backward due to the reaction and releasing the screwing with the front shaft cylinder.

Further, by setting a relatively large rotation angle of 180 degrees or more, resistance is generated after passing through a certain amount of the running section, so that it is easy to apply force and contribute to reliable mounting. In particular, the user can feel the installation of ink, and the usability can be improved.
On the other hand, it is possible to rotate it with one hand at a time about one rotation, and within 360 degrees, it is possible to proceed to pressing the replaceable ink tank by the first rotation operation. Furthermore, by setting the upper limit to about 3 rotations, the number of rotations during screwing can be suppressed, so that the user can be tired and the replacement time can be shortened.

  According to the invention described in claim 4, by providing the position adjusting member, the replaceable ink tank can be pressed from an appropriate position regardless of the length of the rear shaft tube. Further, by setting position adjusting members having different lengths, the same writing instrument can be used for various types of replaceable ink tanks.

  According to the fifth aspect of the present invention, since the position adjusting member rotates, the variation in the rotation direction of the rear shaft tube is not transmitted to the replaceable ink tank when the rear shaft tube is mounted. In particular, in the screwed configuration, there is a risk that either the exchangeable ink tank and the rear end of the inner surface of the rear shaft tube may be scratched, or the exchangeable ink tank may rotate together. Can do.

Embodiments of the present invention will be described with reference to the drawings. In the scope of the claims, the embodiment can be changed as appropriate.
FIG. 2 is an external view (a) and a cross-sectional view (b) of the brush pen (1) according to the present embodiment. First, to describe the appearance, in order from the front end, the cap (10), the tip (20), which is the pen tip stored in the cap (10), the front shaft tube (30) that arranges the tip (20) forward, A rear shaft tube (40) screwed into the front shaft tube (30) and a rear end cap (50) attached to the rear of the rear shaft tube (40) are provided. When writing, remove the cap (10) and write with the tip (20).

  The cap (10) includes a cap front end portion (101), a clip portion (102), and a cap main body portion (103) at the front end. A screw groove (female screw) (103a) is provided on the inner periphery of the rear end of the cap main body (103) so that it can be screwed onto the outer periphery of the rear shaft tube (40).

  Since this example is a brush pen, the tip (20) is a brush using itachi hair. The writing instrument of the present invention is not limited to a brush pen, and any pen tip may be used as long as it is a writing instrument using a replaceable ink tank such as a fountain pen, a ballpoint pen, or a marker.

  As seen in the cross-sectional view (b), the front shaft tube (30) has a tapered tip holding portion (301) for holding the tip (20), a decorative ring (302), and the tip holding portion (301). ), A relay core (304) for transferring ink to the tip (20), an adjuster (305) for adjusting the ink discharge amount, an O-ring (306) for fixing the adjuster, It consists of a front shaft cylinder main body (307) that forms the main body of the front shaft cylinder (30) on the outer periphery of the internal mechanism.

  An ink supply pipe portion (308), which is a tubular body protruding rearward, is formed at the rear of the O-ring (306) and at the rear of the front shaft cylinder main body (307). The above-described relay core (304) is extended inside the ink supply pipe section (308).

A cartridge type ink tank (31) is attached to the ink supply pipe section (308). The ink tank (31) is substantially cylindrical and has a front end opened and a rear end closed.
A cart stopper (310) is fitted on the inner periphery of the front end, and when the ink tank (31) is not used, a metal ball (311) is held in the cart stopper (310). The inner peripheral side of the cart stopper (310) is the ink supply port (312) in the present invention.

  When the ink tank (31) is pressed toward the ink supply pipe (308), the rear end of the ink supply pipe (308) pushes the metal ball (311) backward. When the metal ball (311) is detached from the cart stopper (310), the pinching state of the metal ball (311) is released, and the metal ball (311) rolls freely in the ink containing portion (313), and the ink is supplied to the ink supply port (312). ) Can flow out.

A screw portion (male screw) (307a) is formed on the outer periphery of the front shaft tube main body portion (307) of the front shaft tube (30).
The rear shaft tube (40) is provided with a screw portion (female screw) (401a) that is screwed with the screw portion (307a). For example, the front shaft tube (30) and the rear shaft tube are formed by four screws. (40) is configured to be detachable.

  In the present embodiment, most of the entire length of the rear shaft cylinder (40) is an integral member having a length for storing the ink tank (31). However, in the present invention, the rear shaft cylinder (40) has a plurality of tubular body members. It may be formed from. That is, even in a configuration in which the ink tank (31) is covered with a plurality of members from the front end to the rear end, these are collectively referred to as a rear shaft cylinder.

  In the present invention, a contact member (41) that contacts the rear end portion (31a) of the ink tank (31) is fitted to the rear end of the rear shaft tube (40). The abutting member (41) has a front screw part (41a) screwed into the inner periphery of the rear shaft cylinder (40) and a rear end part (31a) of the ink tank by closing the rear end of the rear shaft cylinder (40). And a rear screw part (41c) screwed into the rear end cap (50).

In the writing instrument (1) as described above, the structure according to the present invention uses the following configuration.
As shown in FIG. 1A, the ink tank (31) is inserted into the rear shaft tube (40), and the rear shaft tube (40) is screwed into the front shaft tube (30).
The contact member (42) in FIG. 1 is another embodiment having a different structure from the contact member (41) in FIG. 2, and the contact surface (42a) is at the front end. Thus, the structure of the contact member of the present invention is arbitrary, and the rear member (40) may be integrally molded with the rear portion of the rear shaft tube (40) as a closed end.
The ink tank (31) is slidable back and forth in the axial direction, and the rear end (31a) and the contact surface (42a) may contact each other, but no load is generated in this state.

  The state shown in FIG. 1B, that is, the position at which the screw portion (307a) of the front shaft tube (30) and the screw portion (401a) of the rear shaft tube (40) start to be screwed (starting position). ), The ink tank (31) is still free.

  Further, when the rear shaft cylinder (40) is rotated, the rear shaft cylinder (40) moves forward toward the front shaft cylinder (30), so that the ink supply port (312) of the ink tank (31) and the ink supply are internally provided. The tube portion (308) is inserted, and the metal ball (311) is pressed. The position of the rear barrel (40) at this time is the position after the initial rotation, and in this embodiment, the position is advanced by one screw (one rotation) from the disclosed position.

Thus, in the present invention, the ink tank (31) is sandwiched between the ink supply pipe (308) and the abutting member (41) and is gradually mounted according to the screwing of the rear shaft cylinder (40). At that time, first, screws are arranged so that the ink tank (31) can be screwed from a slidable state.
The ink tank (31) is completely sandwiched when the position reaches the position after the initial rotation, and thereafter the ink supply pipe (308) is inserted into the ink tank (31) by screwing.

  Here, from the starting position to the position after the initial rotation, the number of rotations of the rear shaft cylinder (40) relative to the front shaft cylinder (30) is 10 degrees to 3 rotations (1080 degrees). The range is preferable. That is, after screwing even at 10 degrees, the direction of the rear barrel is determined, and the user can easily perform the subsequent rotation. On the other hand, if the number of rotations increases too much, the ink tank (31) will be idled indefinitely without wearing the ink tank (31) indefinitely, causing fatigue of the user due to rotation and anxiety that there is no mounting tube, reducing the feeling of use. To do.

  More preferably, about 30 degrees to one rotation (360 degrees) is preferable. In order to make it difficult to reversely rotate due to the reaction, it is desirable to rotate about 30 degrees, and with a normal thickness pen, since it can be rolled with one hand is about one rotation, the position after the initial rotation is easily It is about 360 degrees. In this embodiment, one rotation is used.

  As shown in FIG. 1C, at the completion position where the front shaft cylinder (30) and the rear shaft cylinder (40) are completely screwed together and attached, the ink supply pipe section (308) is moved to the ink tank ( 31) is inserted to the specified position. The specified position is preferably such that the ink tank (31) is securely attached without leaking, while the ink tank (31) is not difficult to remove.

  Conventionally, it has been difficult to remove the ink tank (31) due to excessive pushing of the ink tank (31). However, in the present invention, the front shaft cylinder (30) and the rear shaft cylinder (40) are positioned at the completion position. Since the fitting is completed, it does not proceed any more and can be surely fitted to the specified position every time.

  Furthermore, since the contact member (41) and the ink tank (31) are always in contact, the ink tank does not fall off from the ink supply pipe (308), and the ink tank is detached due to vibration or the like and the ink leaks. Can also be prevented.

  In summary, in the present invention, the distance (L2) between the rear end of the ink supply pipe (308) and the contact surface (42a) at the start position is larger than the total length (L1) of the ink tank (31). It is long, and L1 and L2 are equal at the position after the initial rotation, and the length of L1-L2 is equal to the specified length of insertion of the ink supply pipe section (308) at the completion position.

In FIG. 3, the ink tank (31) is set in the rear shaft tube (40) first, but the ink tank (31) may be set on the front shaft tube (30) side.
(Another embodiment)
Although the present invention has the above-described configuration, the contact member (43) may be configured to be rotatable as shown in FIGS. In this embodiment, the contact member is composed of two members, a base body (430) and a rotating body (431).
That is, it has a base body (430) fitted to the rear end of the rear shaft tube (40) and a rotating body (431) rotatably supported by a central hole (431) of the base body.

  Since the front end surface (431a) of the rotating body (431) contacts the rear end (31a) of the ink tank (31), the ink tank (31) moves together with the front shaft cylinder (30). Even if the rear shaft cylinder (40) is rotated, friction in the rotational direction can be suppressed by the rotating body (431).

  At the same time, by changing the axial length of the rotating body (431), the start position, the initial post-rotation position, and the completion position according to the present invention are aligned according to the total length of the ink tank (31). This contributes to writing instruments compatible with various ink tanks.

  In the above embodiment, only the configuration in which the front shaft barrel and the rear shaft barrel are screwed together has been described. However, the present invention is not limited to this and may be simply fitted. Even in that case, it is possible to obtain a good mounting property by fitting a shaft cylinder that is easier to hold than inserting a replaceable ink tank that is small in diameter and slippery. At this time, the fitting of the front shaft cylinder and the rear shaft cylinder starts before the fitting of the ink supply port and the ink supply pipe starts, and after the direction is fixed, the fitting of the ink supply port and the ink supply pipe starts. It ’s best to start the match.

It is explanatory drawing explaining mounting | wearing of a rear axial cylinder to this invention Example. It is the external view and sectional drawing of the writing instrument in this invention Example. It is explanatory drawing using the contact member which rotates in another Example of this invention. It is an enlarged view of an abutting member.

Explanation of symbols

20 Tip 30 Front shaft tube 308 Ink supply tube 31 Ink tank 311 Metal ball 312 Ink supply port 40 Rear shaft tube 401a Screw portion 42 Contact member 42a Contact surface 50 Rear end cap

Claims (4)

A writing instrument that includes at least a front shaft cylinder having a pen tip at the front end and a rear shaft cylinder configured to be detachable from the front shaft cylinder, and is equipped with a replaceable ink tank filled with ink to supply ink. Because
The ink supply port of the replaceable ink tank is disposed so as to face the end of the ink supply pipe in the front shaft cylinder with the rear shaft cylinder detached, and the replaceable ink tank is covered with the ink supply port. When attaching the rear barrel to the front barrel,
The rear end portion of the replaceable ink tank and the position adjusting member provided at the rear end portion of the inner surface of the rear shaft cylinder come into contact with each other, and as the rear shaft cylinder is mounted toward the front shaft cylinder, The ink supply port is pressed toward the ink supply tube;
The ink replaceable writing instrument, wherein the replaceable ink tank is also mounted in a predetermined position at a position where the rear barrel is completely mounted. In the configuration in which the front shaft tube and the rear shaft tube are screwed together,
At the start position where screwing is started for the first time after the rear shaft cylinder is detached, the rear end portion of the replaceable ink tank and the inner surface rear end portion of the rear shaft tube are displaceable,
The rear end portion of the replaceable ink tank and the position adjustment member provided at the rear end portion of the inner surface of the rear shaft tube are in contact with each other at a position after the initial rotation in which the rear shaft tube is rotated from the start position.
Thereafter, the replaceable ink tank is gradually pressed along with the rotation of the rear barrel,
The ink replaceable writing instrument according to claim 1, wherein the replaceable ink tank is mounted at a predetermined position at a completion position when the screwing is completed. The position after the initial rotation is a position obtained by rotating the rear shaft tube by 10 degrees to 1080 degrees (3 rotations), more preferably from 30 degrees to 360 degrees (1 rotation) from the start position. Ink-replaceable writing instrument. The position adjusting member is
The ink-replaceable writing instrument according to any one of claims 1 to 3, wherein the ink-replaceable writing instrument is rotatable relative to the rear barrel about an axial direction.

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