JP5433983B2 - 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.

Therefore, the present invention is a writing instrument in which a plurality of replaceable refills are inserted into the shaft tube, and a slider is disposed behind the refill, and a joint member is interposed between the slider and the refill, Further, a hole into which the joint member is inserted is formed in the slider, a flat surface portion is formed on the inner surface of the hole, a curved surface portion is formed on the outer surface portion of the slider corresponding to the flat surface portion , and the slider Is made of a transparent or colored translucent material .

The present invention is 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, A hole into which the joint member is inserted is formed in the slider, a flat surface is formed on the inner surface of the hole, a curved surface is formed on the outer surface of the slider corresponding to the flat surface , and the slider is transparent. Alternatively, since it is made of a colored translucent material , loss of the joint member can be prevented as much as possible , and a lens effect is generated on the slider, so that the color of the joint member can be easily identified.
According to the second aspect, the color of the ink stored in the refill can be easily identified.

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.
A first 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 denotes a 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.

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.

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 hole 11 a is formed in the longitudinal direction on the inner side in front of the slider 11. A flat surface portion 11b is formed on the inner surface of the hole 11a when viewed from the front, and an arcuate curved surface portion 11c is formed on the outer surface of the slider 11 corresponding to the flat surface portion 11b. The flat surface portion 11b formed on the inner surface and the curved surface portion 11c formed on the outer surface cause refraction of light and obtain a lens effect.
Then, one end portion (rear portion 15a) of the joint member 15 having a color substantially the same as the color of ink stored in a later-described cursive body is detachably inserted into the hole 11a of the slider 11. 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, since the slider 11 is formed of a transparent or colored translucent material, the color of the joint member 15 located inside the slider 11 can be easily identified. In addition, since the slider 11 has a flat surface portion 11b and a curved surface portion 11c, the color of the joint member 15 can be more easily identified by the lens effect obtained thereby.

A large-diameter portion 15c is formed at the intermediate portion of the joint member 15, and excessive insertion of the rear portion 15a into the hole 11a and excessive insertion of the front portion 15b into the writing body 16 are prevented. In addition, a circumferential fitting protrusion 15d is formed on the rear portion 15a of the joint member 15 in order to improve the insertion and fitting of the slider 11 into the hole 11a, while the front portion 15b A plane portion 15e for air to enter the writing body 16 is formed. The flat portion 15e is formed in four directions with an angle of 90. 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 15e are partially formed with protrusions 15f 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.
An extension portion 11 d that holds the outer diameter portion of the elastic member 17 is formed at the front end portion of the slider 11. The length between the extending portions 11d is formed slightly shorter than the outer diameter of the elastic member 17 so that the elastic member 17 is press-fitted into the extending portion 11d. That is, the elastic member 17 is prevented from being detached from the front end portion of the slider 11 when the writing body 16 is replaced. The insertion force (fitting force) of the slider 11 to the joint member 15 (rear part 15a) is set to be weaker than the insertion force (fitting force) of the writing body 16 to the joint member 15 (front part 15b). 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.
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.

A second example will be described with reference to FIGS. This is an example in which a rectangular through hole 23 is formed in a part of the side surface corresponding to the hole 22 of the slider 21. Through this through hole 23, it is possible to confirm the presence and color of the joint member 15.
In this example, the rectangular through-hole is used, but a plurality of circular or elliptical through-holes may be formed, or an interesting shape such as a character-like through-hole may be formed.

The external appearance front view which shows one example of this invention. The side view of FIG. The longitudinal cross-sectional view of FIG. 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 disassembled principal part enlarged view in FIG. The front view of a slider. The external appearance perspective view of a joint member. The external appearance perspective view which shows the connection state of the cursive body which shows a 2nd example, a joint member, and a slider. The enlarged view of the slider of FIG.

Explanation of symbols

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 11 slider 12 sliding protrusion 13 release protrusion 14 release protrusion 15 joint member 16 Part 19 Through-hole 20 Groove part 21 Slider 22 Hole 23 Through-hole

Claims (2)

A writing instrument in which a plurality of replaceable refills are inserted into the shaft cylinder, and a slider is arranged behind the refill, and a joint member is interposed between the slider and the refill, and the joint is connected to the slider. A hole into which the member is inserted is formed, a flat surface is formed on the inner surface of the hole, a curved surface is formed on the outer surface of the slider corresponding to the flat surface , and the slider is transparent or colored. Writing instrument characterized by comprising a translucent material . 2. The writing instrument according to claim 1, wherein the joint member has the same color as the color of ink stored in the refill .

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