JPH0535378U - Writing instrument having a solid core such as a modified core - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a writing instrument having a ball-point pen with a solid correction core for erasing ball-pen characters, a solid fluorescent core, a crayon core, and the like. [Structure] A cap 4 having an open upper end is provided, a spiral groove 5 is formed on an inner surface thereof, a slit 10 is provided in one half of the cap 4 and an elastic member 14 is provided in the other half of the cap 4. The inner cylinder 8 is rotatably loaded, and a movable holder 11 for holding the solid core 12 is provided in the inner cylinder 8 which has a protrusion 13 exposed from the slit 10 and fitted into the spiral groove 5. It is provided so that the tip of the neck of the ball-type knock mechanism 18 can be locked in the end of the inner tube 8. [Effect] A writing instrument including a ball-point pen and a solid core such as a solid core and a fluorescent core can be obtained, and the solid core can be smoothly fed out.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a writing instrument, and more particularly, to a writing instrument having a white and solid correction core, a fluorescent core, and the like to be overcoated on a written character together with a writing pen.

[0002]

[Prior Art]

 BACKGROUND ART Conventionally, a writing instrument in which a ball pen and a sharp pencil are integrated and a writing instrument in which an eraser is attached are known.

[0003]

[Problems to be solved by the device]

 However, in the past, there was no ball pen with a solid correction core for erasing the ball pen characters, a solid fluorescent core, a crayon core, etc., so the present invention provides such a writing instrument. The task is to do.

[0004]

[Means for Solving the Problems]

 According to the present invention, a cap having a clip and having an open upper end is provided, a spiral groove is formed on the inner surface of the cap, a slit is provided in one half of the cap, and an elastic inward is formed in the other half. An inner cylinder having a curved elastic member is rotatably inserted therein, and has a protrusion exposed in the slit and fitted into the spiral groove in the inner cylinder to hold a solid core. A writing tool having a solid core such as a correction core, characterized in that a movable holder is provided, and the tip of the neck of a knock type mechanism of a ball-pen can be locked in the end of the interior cylinder. Solved the problem.

[0005]

[Work]

 By rotating the cap, the movable holder moves inside the inner cylinder by the protrusion thereof moving along the slit of the inner cylinder. Along with the movement of the movable holder, the solid core protrudes from the cap head. When using a ballpoint pen, knock on the cap as before.

[0006]

【Example】

 BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of the present invention will be described with reference to the accompanying drawings. In the figure, reference numeral 1 denotes a clip having a cylindrical fitting portion 2 in which a concave portion 3 is formed on an inner surface of the fitting portion 2. Reference numeral 4 is a cap having a spiral groove 5 on its inner side surface, and the fitting portion 2 of the clip 1 is fitted to the upper end portion thereof. A projecting portion 6 is formed on the clip fitting portion of the cap 4 so that the projecting portion 6 fits into the concave portion 3. A step portion 7 is provided at the lower end of the spiral groove 5 forming portion on the inner surface of the cap 4.

Reference numeral 8 is an internal cylinder that is inserted into the cap 4, and has a collar 9 at the upper end. The collar 9 contacts the upper end surface of the cap 4 when the inner cylinder 8 is inserted into the cap 4, and functions as a stopper. A pair of slits 10 are provided in the upper half of the inner cylinder 8 in the longitudinal direction. Then, the movable holder 11 is arranged in the interior cylinder 8 so as to be vertically movable. The movable holder -11 holds a solid core 12 such as a solid correction core, a fluorescent core, and a crayon core, and moves in the internal cylinder 8. The movable holder -11 is exposed from the slit 10 on the surface and fits into the spiral groove 5. It has a projecting portion 13 (see FIG. 2).

A pair of elastic members 14 that are elastically curved inward by removing the periphery are provided in the middle portion of the inner cylinder 8. At the tip of the elastic member 14, there is formed an overhanging portion 14a which is oversized and is larger than the inner diameter of the cap 4. The overhanging portion 14a is adapted to gradually overhang outward from the lower side to the upper side (from the left side to the right side in FIG. 1). An annular stopper 15 is provided on the inner surface of the lower portion of the inner cylinder 8 so as to project.

Reference numeral 16 is a shaft, and an annular stopper 17 is projectingly provided on an inner surface of an intermediate portion of the shaft. A ball-pen knock mechanism 18 is installed in the shaft 16. The internal structure of the knock-type mechanism 18 is the same as that of the conventional one, and therefore its explanation is omitted. At the upper end of the knock mechanism 18, a neck portion 20 in which a cap-up spring 19 is mounted is provided. The front end of the neck portion 20 is cracked so that it can be elastically curved inward, and a hook 21 that is hooked by the stopper 15 is formed at the front end. The hook 21 is formed with a constricted portion 21a into which the stopper 15 is fitted.

The writing instrument having the above structure is assembled as follows. That is, first, the clip 1 is fitted to the cap 4 by aligning the projection 6 with the recess 3. Then, the inner cylinder 8 is inserted into the cap 4 from above, the protrusion 13 of the movable holder 11 is fitted into the spiral groove 15, and then the inner cylinder 8 is rotated so that the collar 9 contacts the upper end surface of the cap 4. To enter. At that time, the elastic member 14 advances in a state of being elastically curved inward along the inner side surface of the cap 4, but when the collar 9 comes into contact with the upper end surface of the cap 4, the tip of the elastic member 14 is stretched. The projecting portion 14a disengages from the stepped portion 7 and spreads outward, in other words, returns to the original state. As a result, the overhanging portion 14a comes into contact with the stepped portion 7, so that the inner cylinder 8 cannot be removed from the cap 4.

Next, the knock mechanism 18 is inserted into the shaft 16 from below. In that case, the hook 21 first hits the stopper 17, but if it is further forcedly pushed, the tip of the neck 20 is inward. The hook 21 passes through the portion of the stopper 17 and does not come off from there. After mounting the cap-up spring 19 on the neck portion 20 in that state, when the tip end of the shaft 16 is inserted into the cap 4, the hook 21 abuts on the stopper-15. Then, when the hook 21 is pushed further in the same manner as described above, the upper end of the hook 21 passes through the stopper portion 15 and the stopper 15 is housed in the constricted portion 21a, so that the neck portion 20 does not come off from the internal cylinder 8. The cap-up spring 19 is located between the stopper-15 and the stopper-17, and always acts to push up the cap 4 via the internal cylinder 8.

To explain the method of using the writing instrument according to the present invention, when a ball-point pen is used, the shaft 16 is pressed and the cap 4 is pressed in the axial direction against the pushing force of the cap-up spring 19. Then, the neck portion 20 is pushed through the stopper 15 of the inner tube 8, and the core is exposed from the tip of the writing instrument (not shown). The core is locked by the mechanism of the knock mechanism 18 to maintain the exposed state. By releasing the pressing force, the cap 4 returns to its original state by the action of the cap-up spring 19. Then, when the cap 4 is pressed again, the lead is released from the locked state by the knock mechanism 18 and hidden in the writing instrument tip.

When using the solid core 12, the shaft 16 is pressed and the cap 4 is rotated. Then, since the protrusion 13 of the movable holder 11 is fitted in the spiral groove 5, the protrusion 13 moves axially along the slit 10 as the spiral groove 5 moves. That is, the movable holder 11 rises in the inner cylinder 8 and the solid core 12 is paid out. When the cap 4 is turned in the opposite direction, the solid core 12 is submerged in the cap 4.

[0014]

[Effect of the device]

 The present invention is as described above, and it is possible to obtain a writing instrument provided with a ball-point pen and a solid core such as a solid core, a fluorescent core, and the like, and there is an effect that the solid core can be smoothly delivered.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an essential part of an embodiment of the present invention.

FIG. 2 is an exploded perspective view of an essential part of an embodiment of the present invention.

[Explanation of symbols]

 1 Clip 4 Cap 5 Spiral Groove 8 Inner Cylinder 10 Slit 11 Movable Holder-12 Solid Core 13 Projection 14 Elastic Member 15 Stopper-16 Shaft 18 Knock Mechanism

Claims (1)

[Scope of utility model registration request] 1. A cap having a clip and having an open upper end is provided, a spiral groove is formed on an inner surface of the cap, a slit is provided in one half of the cap, and the other half is formed inward. An inner cylinder having an elastically curved elastic member opposite thereto is rotatably inserted, and a protrusion exposed from the slit and fitted into the spiral groove is held in the inner cylinder to hold a solid core. A movable holder to be installed, and inside the end of the inner cylinder,
A writing instrument having a solid lead such as a correction lead, characterized in that the tip of the neck of a ball-type knock mechanism can be locked.