JP4549478B2 - Sliding multi-core writing instrument - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a slide-type multi-core writing instrument in which a plurality of writing bodies are arranged in a shaft cylinder, and more particularly to a slide-type multi-core writing instrument in which a crown is attached.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a writing instrument in which a crown is attached to an end portion of a shaft tube or a cap for a purpose such as a decoration effect is well known. In such a crown, a certain amount of force is applied to the protruding amount of the part exposed to the outside and the axial direction to prevent so-called accidental swallowing, which accidentally swallows the missing crown. The power that does not come out is prescribed.
[0003]
[Problems to be solved by the invention]
The mounting structure of the head crown in the slide type multi-core writing instrument in which a plurality of writing bodies are arranged in the shaft cylinder is formed at the cylindrical protrusion formed on the bottom surface of the crown and the rear end of the shaft cylinder. The head cap is mounted by press-fitting or over-press fitting with the fitting hole, or by screw fitting. In a slide-type multi-core writing instrument, there is a protruding and retracting mechanism such as a slide member at the rear end of the shaft tube. Therefore, it is difficult to form a head and crown mounting part in the vicinity of the protruding and retracting mechanism. Since the head crown was attached to the position having the height, the width of the design could not be expanded.
[0004]
Also, the setting of the fitting force for the above-described press-fitting and over-fitting is dependent on the amount of wrapping at the time of press-fitting and the protruding amount of the convex portion that gets over at the time of over-ride. If the fitting force is set high, it will be difficult to remove, but conversely it will be difficult to attach, and the assemblability will deteriorate. Considering assembling property, if the fitting force is set weak, there is a problem that it becomes easy to come off. In addition, the screw fitting has a problem in that the structure is complicated and the manufacturing cost is significantly increased.
[0005]
As a result of diligent research to prevent the crown from coming off as a result of the present invention, the rotation of the crown causes the fitting portion to wear over time, resulting in a decrease in the initially set fitting force, and the rotation direction and axial direction. By applying a force in the torsional direction by applying a force to the head, the present invention has been realized that it is easier to remove the crown than when applying a force only in the axial direction. Slide-type multi-core that restricts movement in the axial direction and rotational direction of the lens, prevents it from coming off easily, improves assemblability, and allows the head crown to be worn without separation from the retracting mechanism It is to provide a writing instrument.
[0006]
[Means for Solving the Problems]
In the storage case of the storage case in which a plurality of writing bodies are disposed within the shaft cylinder, and the slide member disposed at the rear end of each writing body is integrated with or attached to the rear end portion of the shaft cylinder , ridges formed in the slide member, thereby slidably accommodated by protruding from the housing case outer circumferential surface, in the multi-core writing instrument of sliding obtained by mounting the Atamakanmuri the storage case rear end, said housing chamber And forming an insertion hole communicating with the storage chamber at the rear end of the storage case, and a protrusion having a convex claw on the bottom surface of the crown. The head crown is attached by forming the protrusion of the head crown into the insertion hole and engaging the claw portion with the engaged portion formed in the storage chamber.
[0007]
The insertion hole has a diameter smaller than a diameter of a circumscribed circle of the claw portion.
[0008]
The slide type multi-core writing instrument of the present invention is, for example, by moving one raised portion of the slide member forward in the direction of the tip of the shaft tube, so that the locking portion of the slide member is formed on the locked portion formed in the shaft tube. By engaging, the writing tip of the writing body can be selected and protruded from the opening of the shaft tube tip, and the raised portion of the other slide member is advanced in the direction of the shaft tube, so that The other unlocking projection releases the latching portion that was latched to the latching portion, and the other slide member moves forward to lock the other latching portion to the latched portion and maintain the protruding state. It has a writing-out mechanism for the writing tip.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same members and parts indicating the same portions.
The slide-type multi-core writing instrument 1 of the present invention can be slid by a rear shaft 3b screwed to a rear end portion of a front shaft 3a and urged rearward by a resilient member 21 to the rear end of the rear shaft 3b. The ball case 5 and the mechanical pencil body 9 are urged rearward by the elastic members 14 and 15 and stored in the shaft cylinders 3a and 3b and the storage case 4.
The ball-point pen body 5 is press-fitted and fitted with a tip member 7 holding a ball 8 rotatably at the tip of an ink containing cylinder 6. The mechanical pencil body 9 has a lead pipe case 10 fitted to a lead core case 10. Further, the front end portions of the slide members 12 and 13 serving as operating bodies are press-fitted into the rear end openings of the ink storage cylinder 6 and the lead core case 10, and the raised portions 12 a and 13 a are cut into the storage case 4. It is held in a state of protruding from the outer peripheral surface of the shaft tube from the notches 16 and 17. Protrusions 12b and 13b are formed at the rear ends of the slide members 12 and 13 in order to prevent the shaft cylinder from jumping out.
[0010]
When using the mechanical pencil body 9, the raised portion 13 a is moved forward in the direction of the axial tube tip opening 3 c, so that the subject portion (not shown) formed on the sliding body 4 by the locking portion 13 c of the slide member 13. ), The tip pipe 11 of the mechanical pencil body is projected from the tip opening 3c and used. When the ball-point pen body 5 is used, the release protrusion 12e of the slide member 12 is moved forward in the direction of the axial tube tip opening 3c so that the release protrusion 12e of the slide member 12 is locked to the locked portion. Contacting the ball portion 13d, the locking portion 13c is pushed out, and the locking of the slide member 13 is released. Further, the protruding portion 12a is advanced in the direction of the axial tube end opening 3c, whereby the locking portion 12c of the slide member 12 is locked to the locked portion (not shown), and the tip member 7 of the ballpoint pen body 5 is moved. Can be used by protruding.
[0011]
In order to attach the crown 2 to the end of the storage case 4, an insertion hole 20 communicating with the storage chambers 18 and 19 is formed at the rear end of the storage case 4, and a convex nail portion is formed on the bottom surface of the crown 2. A protrusion 2 a having 2 b is formed at a position corresponding to the storage chambers 18 and 19, the protrusion 2 a is inserted into the insertion hole 20, and the convex claw 2 b formed on the protrusion 2 a passes through the insertion hole 20. The crown 2 is mounted by engaging the claw portion 2b with the engaged portion 4a which is the rear wall surface of the storage chambers 18, 19 (the front end surface of the insertion hole 20).
[0012]
The storage chambers 18 and 19 are formed by dividing in the radial direction according to the number of slide members, and the protrusion 2a is formed at a position corresponding to the storage chambers 18 and 19, so that the rotation direction Prevent moving to. In addition, when the claw portions 2b are engaged with the engaged portions 4a of the storage chambers 18 and 19 of the storage case 4, the notches 2c can be easily bent inward, so that they can be easily inserted. When the claw part 2b is engaged with the joint part 4a, the projecting part 2a bent inward is returned to its original state, so even if a force is applied in the removal direction (arrow F direction in FIG. 4). The crown 2 is not easily removed. The engagement between the claw portion and the engaged portion 4a can be easily set by setting the diameter M of the insertion hole smaller than the diameter L of the circumscribed circle of the claw portion 2b.
[0013]
In addition, the shape of the protrusion of the crown according to the present invention is not particularly limited as long as a convex claw is formed at the tip of the protrusion, and the protrusion corresponds to the storage chamber. It is important to form at the position. Further, in this embodiment, the engaged portion is the rear wall surface of the storage chamber. However, the present invention is not limited to this, and a protrusion or a step that engages the claw portion with the storage chamber may be formed. That's fine.
[0014]
Further, the slide type multi-core writing instrument of the present invention is not limited to the above-described mechanical pencil and ball-point pen multi-core writing instrument, and generally known slides such as three or four ball pens or three mechanical pencils. It can be used for multi-core writing instruments of the formula.
[0015]
【The invention's effect】
Since the present invention has the configuration as described above, the movement of the crown in the axial direction and the rotational direction is restricted, and the slide crown is attached to the crown so that it does not easily come off and is easy to assemble. We were able to provide a multi-core writing instrument. In addition, since the head crown is mounted using the storage room, it can be mounted without being separated from the position of the in / out mechanism, so that the width of the design can be widened.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a slide-type multi-core writing instrument according to a first embodiment of the present invention.
FIG. 2 is a longitudinal sectional view showing a state in which the mechanical pencil body in FIG. 1 is protruded.
FIG. 3 is an enlarged cross-sectional view of a main part in which a part of FIG. 1 is omitted.
4 is a longitudinal sectional view of FIG. 3 with a slide member omitted.
5 is an enlarged cross-sectional view of the main part of FIG. 4 before the crown is attached.
6 is a cross-sectional view taken along the line AA in FIG.
7 is a cross-sectional view taken along the line BB in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sliding multi-core writing instrument 2 Head crown 2a Protrusion part 2b Claw part 4 Storage case 4a Engagement part 12, 13 Slide member 12a, 13a Raised part 16, 17 Notch part 18, 19 Storage chamber 20 Insertion hole L Claw Diameter of circumscribed circle of part M Diameter of insertion hole

Claims (2)

A plurality of writing bodies are arranged in the shaft cylinder, and a slide member arranged at the rear end of each writing body is formed on the slide member in a storage chamber of a storage case integrally or attached to the rear end portion of the shaft cylinder. ridges were found with slidably accommodated by protruding from the housing case outer circumferential surface, in the multi-core writing instrument of sliding obtained by mounting the Atamakanmuri the storage case rear end, the housing chamber in the radial direction An insertion hole that communicates with the storage chamber is formed at the rear end of the storage case, and a protrusion having a convex claw portion on the bottom surface of the crown is located at a position corresponding to the storage chamber. The slide is characterized in that the crown is mounted by inserting a projection of the crown into the insertion hole and engaging the claw with an engaged portion formed in the storage chamber. Formula multi-core writing instrument. The sliding multi-core writing instrument according to claim 1, wherein the insertion hole has a diameter smaller than a diameter of a circumscribed circle of the claw portion.

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