JP5434446B2 - Writing instrument - Google Patents

Description

  The present invention relates to a writing instrument in which a plurality of replaceable refills are inserted into a shaft cylinder, and a slider is disposed behind the refills. Examples of the refills include a ballpoint pen refill and a mechanical pencil unit. Can be mentioned.

In general, the slider of a multi-core writing instrument has the same color as the ink color of the refill (writing body). For this reason, when a refill of an ink color different from the color of the slider is mounted depending on the user's preference, there is a possibility that an incorrect cursive font is selected.
Therefore, a multi-core writing instrument has been invented in which a raised portion of the same color as the ink color of the refill can be easily replaced by providing a raised portion as a separate member on the slider and making the raised portion detachable.
That is, a plurality of writing bodies are urged and arranged in the axial direction by the elastic member in the axial direction of the axial end of the axial cylinder. A locking part formed at the rear end of one sliding body is formed in the shaft cylinder by projecting outward and connecting, and sliding one sliding body in the direction of the opening of the shaft cylinder through the raised portion. The writing tip of one writing body connected to one sliding body is projected from the opening at the tip of the shaft cylinder, and the other sliding body is connected to the shaft cylinder via the raised portion. By sliding in the direction of the tip opening, the release protrusion formed on the other sliding body causes the locking portion of one sliding body that is in contact with one sliding body and locked to the stopping portion to be engaged and disengaged, One writing tip is immersed from the shaft tube tip opening, and the other sliding body is further slid toward the shaft tube tip opening. In the slide-type composite writing instrument that can be moved in and out by selecting the writing tip portion, the other locking portion is locked to the stopping portion to maintain the protruding state of the writing tip portion of the other writing body. It is a slide-type composite writing instrument that is detachably attached to a sliding body.
JP2003-011583A.

  However, the ridge must be exchanged each time it is replaced with a different ink-colored cursive body, which is troublesome for the user and the ridge is a small part and is also exposed from the shaft cylinder. Therefore, there is a high risk of losing, and if it is lost, there will be a problem that the cursive operation cannot be performed.

Accordingly, the present invention is a writing instrument in which a plurality of replaceable refills are inserted into a shaft tube, and a slider is disposed behind the refill, and a joint member is interposed between the slider and the refill. A projection is formed in front of the slider, and an engagement hole is formed in the rear portion of the joint member so that the projection is detachable , and the shaft tube is made of a transparent or colored translucent material. In addition, the gist is that the joint member has the same color as the color of the ink stored in the refill .

The present invention is a writing instrument in which a plurality of replaceable refills are inserted into a shaft tube, and a slider is disposed behind the refill, and a joint member is interposed between the slider and the refill, While forming a projection in front of the slider, an engagement hole is formed in the rear portion of the joint member so that the projection is detachably engaged, and the shaft tube is made of a transparent or colored translucent material, Since the joint member has the same color as the color of the ink stored in the refill , the joint member can be prevented from being lost as much as possible , and the shaft tube is made of a transparent or colored translucent material. The color of the joint member that is the same color as the ink stored in the refill can be easily identified.
Further, because although the barrel is cylindrical, the lens action of the curved surface, joint member is expanded, large diameter, the color of the joint member easily identified, further through a slider according to claim 2 Thus, the color of the ink stored in the refill can be easily identified from the slit through which the slider slides. According to a third aspect of the present invention, when the refill is pulled out from the slider, the joint member is pulled out from the slider together with the refill.

The operation will be described. Since the joint member is located inside the shaft tube, and the front and rear of the joint member are inserted into the refill or slider, the loss of the joint member is prevented.
One example will be described with reference to FIGS. This is a multi-core writing instrument in which a ballpoint pen consisting of two colors of black and red is slidably arranged. You may combine not only a ball-point pen but a mechanical pencil suitably. Reference numeral 1 is a cylindrical shaft main body, and the shaft main body 1 includes a front shaft 2 and a rear shaft 3. Further, in this example, the front shaft 2 is constituted by a screwed structure of the tip member 4 and the middle shaft 5, but may be formed integrally. However, considering the ease of exchanging the cursive and the molding described later, it is better to use two members and fix them detachably. In addition, a conical portion 4a whose diameter gradually decreases toward the distal end side is formed in the inner diameter portion of the tip member 4. A protruding hole 4b in which the cursive body appears and disappears is formed at the tip of the tip member 4.
Further, the shaft cylinder main body 1 is made of a transparent or colored translucent material, but at least the rear shaft 3 is preferably made of a transparent or colored translucent material. The visibility of a joint member to be described later is improved, and the colored joint member can be easily identified. Further, since the shaft cylinder main body 1 is cylindrical, the joint member is enlarged and enlarged in diameter by the curved lens action, so that the shaft cylinder body 1 can be easily identified.

The rear shaft 3 is formed with two slits 6 in the longitudinal direction. In this example, two slits 6 are formed, but the number of ballpoint pens that are cursives is two, and the number of slits that are formed varies depending on the number of cursives. The slit 6 is formed up to one end of the rear shaft 3, and sliding grooves 7 are formed on both sides of the slit 6. However, the sliding groove 7 is not formed over the entire length of both sides of the slit 6 but is formed only up to the middle portion.
Formed in front of the rear shaft 3 is a half-moon-shaped leg portion 8 whose cross-sectional shape has an arc portion on the outside. The leg portion 8 is formed by forming the slit 6. Therefore, the number of legs 8 varies depending on the number of cursive letters. The circumscribed circle diameter of the leg portion 8 is formed smaller than the maximum outer diameter of the rear shaft 3.
Reference numeral 9 denotes a clip portion formed integrally with the rear shaft 3, but it may be formed of a separate member and fixed to the rear shaft 3. Reference numeral 10 denotes a ball part formed integrally with the tip of the clip 9.

A slider 11 made of a transparent or colored translucent material is slidably disposed in the slit 6 of the rear shaft 3. Sliding projections 12 are formed on both sides of the slider 11 in the longitudinal direction, and are slidably engaged with the sliding grooves 7 formed in the slit 6. Two release protrusions 13 and 14 are formed on the back surface of the slider 11 with a space therebetween, and a protrusion 11 a is formed on the front end of the slider 11 in the longitudinal direction. A substantially spherical bulge 11b is formed at the tip of the projection 11a.
The protrusion 11a (the bulging portion 11b) of the slider 11 has one end portion (the rear large diameter portion 15a) of the joint member 15 having a color substantially the same as the color of ink stored in a writing body, which will be described later. A writing body 16 such as a ballpoint pen or a mechanical pencil is connected to the other end portion (front portion 15 b) of the joint member 15. Here, the slider 11 is formed of a transparent or colored translucent material, but may be formed of an opaque material. By forming the slider 11 with a transparent or colored translucent material, the color of the joint member 15 can be identified through the slit 6.
In this example, the writing body 16 is made of a transparent or colored translucent material, but at least a portion of the writing body 16 to which the joint member 15 is connected is transparent or colored. It may be made of a transparent material, or may be made of an opaque material.

An engagement hole 15c is formed on the inner surface of the rear large-diameter portion 15a of the joint member 15, and is detachably engaged with the bulging portion 11b of the slider 11. On the other hand, a flat portion 15 d for air to enter the writing body 16 is formed in the front portion 15 b of the joint member 15. The flat portion 15d is formed in four directions with an angle of 90 degrees. That is, the cross-sectional shape of the front portion 15b of the joint member 15 is a square shape. Further, the four flat portions 15d are partially formed with protrusions 15e in order to obtain a good fitting force with the writing body 16, but the protrusions do not overlap each other. This ensures the invasion of air into the cursive body 16 as the ink is consumed.
A bulging portion 11c is formed at the front end portion of the slider 11 so that a rear end portion of a later-described elastic member 17 is brought into contact therewith. Further, the insertion force (fitting force) of the bulging portion 11b of the slider 11 with respect to the joint member 15 (engagement hole 15c) is weaker than the insertion force (fitting force) of the writing body 16 with respect to the joint member 15 (front portion 15b). Is set. That is, when the writing body 16 is separated from the slider 11, the writing body 16 is detached from the slider 11 in a state where the writing body 16 and the joint member 15 are connected. Since the joint member 15 is provided at the rear portion of the writing body 16, the joint member 15 is surrounded by the elastic member 17 via the writing body 16. That is, since the colored joint member 15 can be visually recognized through the elastic member 17, the joint member 15 is provided with a linear pattern, and the design is improved.
Reference numeral 17 is an elastic member such as a coil spring that biases the writing body 16 and the slider 11 connected to the writing body 16 backward. The cursive body 16 in this example is a ballpoint pen, and the refill of the ballpoint pen 16 is connected to the joint member 15. Specifically, refills containing black and red ink are connected.

  A restricting portion 18 is formed in an intermediate portion of the middle shaft 5 which is one member of the front shaft 2, and two through holes 19 into which the writing body 16 is loosely inserted are formed in the restricting portion 18. The cursive body 16 is urged rearward by locking one end of the elastic member 17 to the restricting portion 18. In addition, two grooves 20 are formed in the longitudinal direction inside the middle shaft 5 and behind the restricting portion 18, and the legs 8 of the rear shaft 3 are slidably contacted with the grooves 20. 8 is guided. Further, the groove portion 20 has substantially the same shape as the cross-sectional shape of the leg portion 8. That is, it has a half-moon shape having an arc portion on the outside.

The external appearance front view which shows one example of this invention. The longitudinal cross-sectional view of FIG. The top view of FIG. XX sectional drawing of FIG. The YY sectional view taken on the line of FIG. FIG. 3 is a sectional view taken along line ZZ in FIG. 1. The external appearance perspective view which shows the connection state of a cursive body, a joint member, and a slider. The front view of a slider. The external appearance perspective view of a joint member. The side view of a joint member. The longitudinal cross-sectional view of FIG.

DESCRIPTION OF SYMBOLS 1 axis | shaft main body 2 front axis | shaft 3 back axis | shaft 4 tip member 5 center axis | shaft 6 slit 7 sliding groove 8 leg part 9 clip part 10 ball part 11 slider 12 sliding protrusion 13 release protrusion 14 release protrusion 15 joint member 16 cursive body 17 repellent Member 18 Restriction part 19 Through hole 20 Groove part

Claims (3)

A writing instrument in which a plurality of replaceable refills are inserted into the shaft cylinder, and a slider is disposed behind the refill, and a joint member is interposed between the slider and the refill, and at the front of the slider. While forming a projection, an engagement hole in which the projection is detachably engaged is formed in the rear portion of the joint member , the shaft tube is made of a transparent or colored translucent material, and the joint member is A writing instrument with the same color as the ink stored in the refill . A slit in which the slider slides is formed in the shaft cylinder, the slider is made of a transparent or colored translucent material, and the joint member has the same color as the color of the ink stored in the refill. The writing instrument according to claim 1. The writing instrument according to claim 1 or 2, wherein a connecting force between the slider and the joint member is weaker than the connection between the refill and the joint member.