JP2016016524A - Writing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid-equipped writing instrument which makes little decrease in the engagement force at an engagement part of the lid body and an engagement object part of the barrel even when the lid body repeatedly opens and closes or time elapses and is capable of surely opening and closing the lid body.SOLUTION: A writing instrument engages an engagement part, where a lid body is disposed to be capable of turning with respect to the barrel and provided at the other end part of the lid body, with an engagement object part formed at the rear end part of the barrel to enable the rear end of the barrel to be exposed and closed. The lid body comprises a lid part, a push button part which is movable radially to the lid part and project radially outward from the outer face of the lid part, and a resilient body disposed in the lid part to constantly energize the push button part radially outward, and is characterized in that the engagement between the engagement part and the engagement object part is released by providing the engagement part in the engagement object part, and by pressing the push button part radially inward from outside against the energization force of the resilient body to move the push button part and the engagement part radially inward.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a writing instrument comprising a lid that exposes and closes the rear end of the shaft tube at the rear end of the shaft tube.

  In a writing instrument comprising a lid that exposes and closes the rear end of the shaft cylinder at the rear end of the shaft cylinder, in Japanese Patent Application Laid-Open No. 2007-38635 “Multi-core writing instrument”, An opening is provided to open the moving groove to the rear, and from the opening, the sliding body can be removed from the shaft tube and inserted into the shaft tube, and a lid is attached to the hinge provided on the shaft tube. A configuration that is movably mounted is disclosed.

JP 2007-38635 A JP 2010-105212 A

  By the way, the lid body engages an engaging portion provided at one end portion of the lid body with an engaged portion formed on an outer surface of the shaft cylinder or a clip attached to the shaft cylinder, and the lid body is engaged with the shaft cylinder. However, there is a problem that the shape becomes complicated, such as being arranged so as to be rotatable. In the multi-core writing instrument of Patent Document 1, when releasing the engagement between the engaging portion of the lid and the engaged portion of the shaft tube, the fingernail is hooked on the end of the lid so that the lid is It pushes backward. However, in the case of a person with short fingernails, the multi-core writing instrument of Patent Document 1 cannot hook the nail onto the end of the lid, so the engaging portion of the lid and the engaged portion of the shaft tube The engagement cannot be easily released, making it difficult to open the opening.

  The multi-core writing instrument of Patent Document 1 normally uses both hands when releasing the engagement between the engaging portion of the lid and the engaged portion of the shaft tube. That is, an operation is performed by holding the shaft tube in one hand and hooking the nail of the fingertip of the other hand on the lid. Therefore, when one hand is closed, it is difficult to release the engagement between the engaging portion of the lid and the engaged portion of the shaft cylinder with only one hand.

  In view of these problems, in Japanese Patent Application Laid-Open No. 2010-105212 “multi-core writing instrument” of Patent Document 2, the engaged portion is configured to be elastically deformable radially inward by an external pressure, and the engaged portion When the portion is elastically deformed inward in the radial direction, the lid is released by the writing body that is disengaged from the engaging portion and the engaged portion and is urged rearward by the elastic body. A multi-core writing instrument is disclosed in which a portion is pressed rearward and the opening is opened.

  However, in Patent Document 2, since the engagement between the engaging portion of the lid and the engaged portion of the shaft tube is released due to elastic deformation, the engaging force is increased due to repeated engagement and disengagement and aging. In addition to the possibility of lowering, there is a problem that the engagement cannot be performed again after the engagement is released until the original state is returned from the elastic deformation.

  An object of the present invention is to solve the above-described conventional problems, and the engagement force between the engagement portion of the lid body and the engaged portion of the shaft tube is maintained even when the lid body is repeatedly opened and closed and time passes. An object of the present invention is to provide a writing instrument provided with a lid that is difficult to lower and that can be reliably opened and closed.

To achieve the above object, according to the present invention, firstly, a writing body is urged and housed rearwardly by a resilient member in a shaft tube, and formed integrally with a rear end portion of the shaft tube. A fitting portion provided at one end of the lid body is fitted to a hinge portion formed on a clip attached to the hinge portion or the shaft cylinder, the lid body is rotatably arranged with respect to the shaft cylinder; and The rear end of the shaft tube can be exposed and closed by detachably engaging the engaging portion provided at the other end of the lid with the engaged portion formed at the rear end of the shaft tube. The lid is disposed within the lid, the lid, a push button that is radially movable on the lid, and protrudes radially outward from the outer surface of the lid. And a bullet body that constantly urges the push button portion radially outward, and the engagement portion is provided on the push button portion, and the push button portion is disposed on the bullet body. By moving the push button portion and the engaging portion radially inward by pressing radially inward from the outside against the urging force, the engagement portion and the engaged portion The engagement is released.
In the present invention, “front” indicates the pen tip side, and “rear” indicates the opposite side.

  According to the first configuration, the push button portion is constantly urged outward in the radial direction in which the push button portion protrudes from the outer surface of the lid body by the elastic body disposed in the lid body. Therefore, even if the engaging portion of the lid and the engaged portion of the shaft tube are repeatedly engaged and released, the engaging force between the engaging portion of the lid and the engaged portion of the shaft tube is reduced. There is no fear. Further, even with a person with a short fingernail or with only one hand, the engagement between the engaging portion of the lid portion and the engaged portion of the shaft tube can be easily released.

  Further, since the push button portion is always urged radially outward (direction in which the push button portion protrudes from the outer surface of the lid) by the elastic body, the pushing force to the push button portion can be released. Thus, the original position is instantly and surely restored. As a result, there is an effect that the engagement can be surely performed even if the engagement and release are performed instantaneously.

  Secondly, in a state where the engaging portion of the lid portion and the engaged portion of the shaft tube are engaged, the lid portion is directly by a writing body biased rearward by the elastic member, or The operation body mounted on the writing body is pressed to the rear side of the shaft tube.

  According to the second configuration, in the state where the engaging portion of the lid portion and the engaged portion of the shaft tube are engaged, the writing body in which the lid portion is urged rearward by the elastic member. When the engagement of the lid body and the engaged portion of the shaft cylinder is released, the lid body is pressed against the rear side of the shaft cylinder directly or by the operating body attached to the writing body. Can be rotated by the elastic force that urges the writing body, and the lid can be easily opened.

  Thirdly, the push button portion is formed at a position that is symmetrical with respect to the axis of the hinge portion and the shaft tube main body, and the engaging portion of the lid portion and the engaged portion of the shaft tube are: It is located on the opposite side (hinge part side) of the push button part with respect to the axis of the shaft cylinder.

  According to the third configuration, since the engaging portion of the lid portion and the engaged portion of the shaft tube are located on the opposite side of the push button portion with respect to the axis of the shaft tube, It is easy to open and close, and an unexpected opening can be suppressed. This is formed at a position on the symmetrical side with respect to the axis of the hinge portion and the shaft tube main body in consideration of releasing the engagement between the cover body and the shaft tube by the push button portion and rotating the cover body. This is because it is most preferable to easily open and close the lid. Further, since the lid body rotates about the hinge portion as a fulcrum, the engaging portion of the lid portion and the engaged portion of the shaft tube are opposite to the push button portion (hinge portion) with respect to the axis of the shaft tube. Position), even if the pressing force is applied to the push button part accidentally due to an impact during movement or the like, and the lid body starts to turn slightly due to the impact, the engaging part and the engaged part of the same shape This is because the rotation angle for releasing the engagement is larger than the case where it is provided on the push button portion side.

  In addition, a synthetic resin material such as PP resin, POM resin, PC resin, ABS resin, or the like can be used for the lid of the present invention, in particular, the lid or push button. In particular, it is most preferable to use a relatively low-hardness resin material such as POM resin or PP resin for the lid portion and the push button portion in view of the over-engagement. Examples of the elastic body that urges the push button portion include a coil spring, a leaf spring, and a soft elastic body such as rubber and elastomer. However, in consideration of repeatability, it is most preferable to use a coil spring.

  According to the present invention, the engagement force between the engagement portion of the lid and the engaged portion of the shaft tube is not easily reduced even when the lid is repeatedly opened and closed, and the lid can be reliably opened and closed. The writing instrument provided with the lid could be provided.

FIG. 3 is a longitudinal sectional view in which a part of the writing instrument of Example 1 is omitted. It is a figure which shows the state which opened the cover body in Example 1. FIG. It is a principal part expanded sectional view in FIG. It is a figure which shows the state which pressed the pushbutton part in FIG. It is a figure which shows the state which opened the cover body in FIG. 1 is an external view of a writing instrument of Example 1. FIG. It is a figure which shows the state which opened the cover body of FIG. FIG. 3 is a diagram showing a cursive body of Example 1.

  Next, embodiments of the writing instrument of the present invention will be described with reference to the drawings, but the present invention is not limited to the following embodiments.

Example 1
The writing instrument 1 according to the first embodiment shown in FIGS. 1 to 8 accommodates a plurality of (four) writing bodies movably in the front-rear direction in a shaft cylinder body to which a front shaft 2 and a rear shaft 3 are screwed. Has been. A sliding body 9 having the same color as the ink for the writing instrument housed in the ink containing cylinder 15 of the writing body 14 is disposed at the rear part of the writing body 14, and the writing body 14 is rearward by a coil spring 12 which is a resilient member. Although the details of the other cursives are not shown in the drawing, as in the cursive 14, a slide type multi-sliding mechanism that has been conventionally provided with three cursives is provided. It is a core writing instrument.

  The writing body 14 is a ball-point pen refill, and a pen tip portion 16 in which a ball is rotatably held is attached to the tip portion of the ink containing cylinder 15, although not shown inside the ink containing cylinder 15. The water-based gel ink having black shear thinning and the ink follower are directly accommodated. Similarly to the cursive body 14, the other three cursive bodies are also equipped with a pen tip portion made of a ballpoint pen tip at the tip of the ink containing cylinder, so that a water-based gel ink and an ink follower different in color from the cursive body 14 can be directly applied. It is a ballpoint pen refill accommodated.

  Four elongated sliding grooves 3B, 3C and the like extending in the front-rear direction are formed in the rear portion of the rear shaft 3, and are formed at intervals of 90 degrees. The sliding grooves 3B and 3C are open at the rear and have an opening (not shown) communicating with the rear end 3A of the rear shaft 3.

  A substantially cylindrical spring support portion 8 is fixed in the rear shaft 3. The spring support portion 8 has an inner hole through which four writing bodies such as the writing body 14 are inserted in the axial direction, and a coil spring 12 between the spring support portion 8 and each of the sliding bodies 9 and 10. 13 and urges the writing body and the sliding body backward, and the sliding body 14 abuts against the lid body 5 to restrict the backward movement. Although not shown, the other two sliding bodies are also provided with a coil spring between the spring support portion 8 and each sliding body in the same manner as the sliding bodies 9 and 10, and the writing body and the sliding body. Is biased backwards.

  A clip base 3E is provided between the rear portion of the rear shaft 3 and the sliding grooves 3B and 3C of the rear shaft 3. A clip piece is attached to the clip base 3E, and the clip 7 is fixed to the rear shaft 3. It is. Further, a hinge portion 3F is formed at the rear portion of the clip base 3E, and the clip 7 provided at one end portion of the lid portion 5A of the lid body 5 made of polypropylene on the hinge portion 3F is viewed from the left and right when viewed from the front. The extending fitting portion 5G is fitted, and the lid body 5 is pivotally fitted. By rotating the lid body 5, the rear end 3A of the rear shaft 3 can be exposed. .

  The lid 5 includes a lid 5A, a push button 5C, an elastic body 5E made of a coil spring, and a spring receiving portion 5F. Specifically, the push button portion 5C is movable in the radial direction with respect to the inside of the lid portion 5A and the spring receiving portion 5F, and is always provided by an elastic body 5E (coil spring) disposed on the spring receiving portion 5F of the lid portion 5A. It is held in a state of projecting radially outward. Further, a part of the push button portion 5C is disposed in a state of protruding outward from the window portion of the lid portion 5A. Further, a crown 6 is attached to the lid 5A.

  The push button portion 5C is integrally provided with an engagement portion 5D, specifically, an engagement portion 5D provided with an inward projection. An outward projection (opposite direction to the inward projection of the push button portion) is provided at the rear end of the rear shaft 3. 3D to be engaged is provided. The engaging portion 5D and the engaged portion 3D are in an engaged state when the lid body 5 is closed, and the engaged state is easy by the urging force of the elastic body 5E of the push button portion 5C. Therefore, the lid 5 is configured not to be released.

  The engaging portion 5D and the engaged portion 3D described above are configured such that when the push button portion 5C is pressed radially inward (in the direction of arrow P in FIG. 4) against the urging force of the elastic body 5E, the push button The engaging portion 5D interlocked with the portion 5C and the push button portion 5C moves in the radial direction, and the engagement between the engaging portion 5D (inward projection) of the lid portion 5A and the engaged portion 3D (outward projection) of the rear shaft 3 is engaged. The rear end 3A of the rear shaft 3 can be opened by releasing the engagement and further rotating the lid 5.

  In order to project the pen tip portion 16 formed of a ballpoint pen tip of the writing body 14 from the tip opening 2A of the front shaft 2, the operation portion 9A of the slide body 9 is opened along the sliding groove 3B. By sliding in the direction of the portion 2A, the engagement protrusion 9B formed on the sliding body 9 is locked to a locking portion (not shown) formed in the rear shaft 3, and the pen tip portion 16 of the writing body 14 is moved. The protrusion can be maintained by selecting from the front end opening 2A of the front shaft. The sliding body 9 is provided with a release protrusion 9C.

  By sliding the operation portion 10A of the other sliding body 10 in the direction of the front end opening 2A of the front shaft 2 while the pen tip portion 16 of the writing body 14 is kept protruding from the front end opening 2A of the front shaft, The release protrusion of the moving body 10 releases the locking of the sliding body 9, and the pen tip portion 16 of the writing body 14 can be immersed in the front shaft 2.

  Further, in order to replace the writing body 14, as described above, the cover 5 closes the rear end 3A of the rear shaft 3 and moves the push button portion 5C in the radial direction against the urging force of the projectile 5F. By pushing in the direction, the push button portion 5C and the engaging portion 5D are moved radially inward (in the direction of arrow P in FIG. 4), and the engaging portion 5D of the push button portion 5C and the engaged portion of the rear shaft 3 are moved. The engagement with 3D is released, and the lid 5 is further rotated to expose the rear end 3A of the rear shaft 3.

  When the lid 5 is rotated and the rear end 3A of the rear shaft 3 is exposed, the rear ends of the sliding grooves 3B and 3C are opened, and the sliding bodies 9 and 10 (others not shown) are coil springs 12. , 13 (others not shown) are projected outward (in the direction of arrow Q in FIG. 7) by rearward urging. By taking out the sliding body 9 from this state, the writing body 14 connected to the sliding body 9 is taken out from the rear shaft 3, and then a new writing body (not shown) and a new writing body are connected to each other. The sliding body is inserted into the rear shaft 3 through the sliding groove 3B having an open rear end. Then, the lid body 5 is rotated forward, and then the engagement portion 5D of the lid body 5 and the engaged portion 3D of the rear shaft 3 are engaged to close the rear end 3A of the rear shaft 3. As a result, the replacement work of the writing body and the sliding body is completed, so that the user can replace the writing body and the sliding body corresponding to the user's preference in the shaft cylinder, and the writing body and the sliding body can be quickly and reliably stored. Can be replaced.

  In this embodiment, for convenience, the lid is rotated and the rear end of the rear shaft is exposed, and the writing body and the sliding body can be replaced. However, the lid is rotated and the rear end of the rear shaft is exposed. In addition, there is no particular limitation as long as the rear end of the rear shaft is exposed by rotating the lid, such as filling a lead core, and the cursive replacement work or lead without losing the lid The core can be filled.

  Further, the place where the push button portion is formed is not particularly limited, but considering that the push button portion releases the engagement between the lid body and the shaft tube and the lid body is rotated, the axis of the hinge portion and the shaft tube main body It is most preferable to form it at a position that is on the symmetric side with respect to the lid, so that the lid can be easily opened and closed.

  In addition, the method for engaging the engaging portion of the lid and the engaged portion of the shaft tube is not particularly limited as long as it can be released by pressing the push button portion from the outside, such as uneven engagement, overpass engagement, press-fit engagement, etc. Although it is not limited, it is most preferable to use the uneven engagement as in the embodiment. In consideration of the difficulty of disengagement, it is preferable to use the overpass engagement. However, in the present invention, the push button portion is always urged radially outward by the elastic body. This is because the resultant force does not decrease, so that the concave / convex engagement is used, and the repeated engagement does not cause a shape change due to wear of the engaging portion of the lid and the engaged portion of the shaft tube. Further, in the present embodiment, the push button portion and the engagement are integrally provided. However, the push button portion can be interlocked with the push button portion in the radial direction, and may be separate.

  The elastic force of the projectile that presses the push button portion is preferably 200 gf to 500 gf in consideration of the operability to press and the prevention of opening due to accidental pressing. Also, by opening the pen tip of the writing body larger than the operation load of the operating body required when protruding from the opening of the shaft tube tip, the opening of the lid when the push button part is accidentally pressed with the operating body is suppressed. It is preferable because it is possible.

  The writing instrument of the present invention can be widely implemented as a writing instrument without being limited to the number of writing bodies such as single core or multi-core or the type of ink.

DESCRIPTION OF SYMBOLS 1 Writing instrument 2 Front shaft 2A Front opening 3 Rear shaft 3A Rear end 3B, 3C Sliding groove 3D Engagement part 5 Lid 5A Lid part 5B Front end 5C Push button part 5D Engagement part 5E Spring receiving part 5F Elastic body 6 Head crown 7 Clip 7A Hinge part 8 Spring support part 9, 10 Sliding body 9A, 10A Operation part 11 Sleeve 12, 13 Coil spring 14 Writing body 15 Ink storage cylinder 16 Pen tip part

Claims (3)

In the shaft tube, the writing body is urged and stored rearward by a resilient member, and at the rear end portion of the shaft tube, the hinge portion formed integrally or the hinge portion formed on the clip attached to the shaft tube, A fitting portion provided at one end of the lid is fitted, the lid is rotatably arranged with respect to the shaft tube, and an engaging portion provided at the other end of the lid is A writing instrument that is detachably engaged with an engaged portion formed at a rear end portion of the shaft tube so that the rear end of the shaft tube can be exposed and closed, and the lid body includes a lid portion, A push button part that is movable in the radial direction on the lid part and protrudes radially outward from the outer surface of the lid part, and is disposed in the lid part, and the push button part is always attached radially outward. The engaging portion is provided in the push button portion, and the push button portion is pressed radially inward from the outside against the urging force of the bullet. It by, by moving the push button portion and the engaging portion radially inward, writing instrument, characterized in that the said engagement portion is engaged with the engaged portion is released. In a state where the engaging portion of the lid portion and the engaged portion of the shaft tube are engaged, the lid portion is mounted directly or by a writing body biased backward by the elastic member. The writing instrument according to claim 1, wherein the writing instrument is pressed toward the rear side of the shaft tube by an operating body. The push button portion is formed at a position that is symmetric with respect to the axis of the hinge portion and the shaft tube main body, and the engaging portion of the lid portion and the engaged portion of the shaft tube are aligned with the axis of the shaft tube. The writing instrument according to claim 1, wherein the writing instrument is located on the opposite side of the push button portion.

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