JP2002321492A - Core feed knob of axial cylinder grip and structure of writing instrument to cover the same with rotary ring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure of a writing instrument which can eliminate losses of time and inconvenience such that in a conventional ballpoint pen, it is necessary to stop writing or to operate a head when a pen point is replaced, by a method wherein an operation knob is provided at the forward portion of the barrel of the instrument to rapidly replace the pen point, while writing is being continued, and a special ring is provided to cover the operation knob, thereby improving the appearance of the instrument and allowing the barrel to be easily gripped when in use. SOLUTION: The pen point replacing knob is provided at the forward portion of the barrel of the writing instrument to allow fingers to grip the barrel, and a rotary ring is provided to cover the knob, while at the time of writing, the knob is exposed. The barrel of the knob is passed through a deformed Z-shaped guide groove of a cylindrical surface in a case so as to be connected to a core receiver to apply a rearwardly directed force thereto by means of a spring. In the guide groove, an engaging lateral groove and a retract lateral groove are formed so that if one core is advanced toward an axis port, another core at the axis port is automatically retracted and the advanced core is fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for replacing a nib of a plurality of colors such as a ball-point pen and a mechanical pen.

[0002]

2. Description of the Related Art Conventionally, replacement of a nib of a plurality of colors, such as a ballpoint pen and a mechanical pen, is performed by pressing a knob on a head or a waist of a pen shaft, or rotating a writing implement shaft.

[0003]

According to the conventional method,
When changing the nib, one must stop writing and change the writing implement. Therefore, switching is troublesome and time is lost,
It was inconvenient.

In the present invention, the pen tip can be changed with one finger while holding a ballpoint pen or a mechanical pen in a writing posture, and a knob for changing the core tip is always covered.

[0005]

Means for Solving the Problems There are Japanese Patent Application Laid-Open Nos. Hei 11-277981 and 2000-108585, which have already been filed by the inventor for solving the above-mentioned problems.

[0006] In the above two cases, the knob is exposed to the barrel, but this time, the knob is not exposed at all times by installing a rotary ring capable of covering the knob to the barrel. Fits to the fingertip that grips the axis during writing, and has the effect of ensuring grip and facilitating writing.

This ring is provided with a ring recess corresponding to the knob in the longitudinal direction of the shaft, a ring groove for the knob to protrude and move, and a height at which the knob can pass through at the position where the knob is retracted. A knob bore is provided at the rear end of the ring recess, and the ring is rotatable at a fixed position of the barrel.

[0008] The shape of the rotating ring is formed in a rice bale shape having a thickness and a curve adapted to be in contact with a fingertip when the shaft is gripped for writing.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings based on embodiments. FIG. 1 shows that when the rotating ring 19 of the grip portion of the present invention is turned, the knob crown 14 at the tip of the knob comes out of the ring groove 23 from the cylindrical groove 2 and the knob crown is operated with one finger in the writing posture. Show that you can. The rotating ring is thicker than a cylindrical shaft and is shaped like a rice bale. It fits the fingertips that hold the shaft, stabilizes the gripping of the shaft, and facilitates writing.

FIG. 2 is a partial side view of one of the embodiments of the present invention, in which a shaft of a three-color core is cut along a line of one cylinder groove of a grip portion thereof. Shaft tip 21 screwed to the tip of the barrel
The rotation ring mounting portion 1-b formed between the step portion 28 of the shaft cylinder and the outer portion 27 of the shaft cylinder is formed thinner than the cylinder shaft 1-a.
The rotating ring 19 and a ring tip tube 26 integrally connected to the front portion thereof are fitted to the rotating ring mounting portion 1-b and can rotate at a fixed position.

The rotating cylinder 3 is rotatable between the inner step 16 of the barrel and the rear end 17 of the tip barrel in contact with the inner surface of the barrel.
As shown in FIG. 8, the number of the core receiving holes 4 through which the core receiver 7 shown in FIG.
On the cylindrical surface of the rotary cylinder 3, each of the core receivers passed through the core receiving holes is disposed on the outer side with respect to the center of the rotary cylinder.
As many guide grooves 5 as the number of cores are provided.

[0012] As shown in FIG.
Forming the shaft stopper projection 8 which is turned up about 5 mm,
A shaft stopper 11 shown in FIG. 7 is inserted from the rear end of the core bearing 7 and locked by the shaft stopper 8. The shaft stopper 11 winds and holds the core bearing, and its top forms a shaft stopper top 12 having a height reaching the height of the cylindrical surface of the rotary cylinder, and a knob shaft 13 shown in FIG. A knob shaft hole 18 is formed. A spring locking projection 9 bent 1.5 mm is formed at the end of the center bearing opposite to the axle projection 8 and serves to lock a spring 10 to be later fitted to the center bearing. The reason why the lower portion of the shaft stopper 11 is open is that when the shaft stopper is inserted into the core bearing, the spring stopper protrusion 9 does not conflict.

After the shaft stopper 11 is passed through the core bearing 7 and locked by the shaft stopper projection 8, all the core bearings are passed through the core receiving holes from the opening direction of the rotating cylinder 3. Although not shown in FIG. 9, the core receiving hole 4 is provided with a defective portion through which the spring locking projection 9 passes.

A spring 10 is fitted from its rear end into a core receiver that projects from the core receiving hole 4 toward the outside of the rotating cylinder. Since the spring is elastic, it is spread and fitted without being hindered by the spring locking projection 9, the front end of the spring is blocked by the bottom surface of the rotating cylinder, and after the spring is completely mounted on the core receiver, the rear end of the spring is fixed by the spring locking projection. The spring is provided with a biasing force which retreats to the rear of the rotating cylinder by this spring.

After the above mounting, the rotating cylinder 3 is inserted into the barrel until the bottom surface of the rotating cylinder hits the inner step 16 of the barrel, and then, as shown in FIG. Pass through 5.

As shown in FIG. 12, the rotating ring 19 is formed in a hollow rice-bale shape, and a ring-end tube 26 having a thickness through which the rotating ring mounting tube portion 1-b passes is formed integrally with the rotating ring at the front end. Have been. The rear end of the rotating ring 19 is also adapted to the thickness of the rotating ring mounting cylindrical portion 1-b.

The rotating ring 19 is connected to the rotating ring mounting cylinder 1-
Then, when the rear end portion 17 of the front end of the shaft end tube 21 is screwed into the front portion of the shaft end tube, the step portion 28 of the shaft end tube is formed as shown in FIG. The rear end of the shaft end cylinder 17 is in contact with the front end of the rotary cylinder 3, and the rotary cylinder 3 and the rotary ring 19 are both set to be rotatable at fixed positions.

As shown in FIG. 12, the hollow rotary ring 19 has a thickest portion which is thick enough for the knob crown 14 to pass through, and a front end formed in a slightly thin rice-bale shape. In the illustrated example, as shown in FIG. , Three vertically elongated ring recesses 23 corresponding to the three knob crowns. A ring groove 24 is provided in the center thereof and a knob hole 25 through which the knob crown 14 can be passed is provided on one side of the rear portion of the ring groove.
To form The ring groove is formed to have a width through which the knob shaft 13 rubs.

At the rear end of the rotating cylindrical surface, a triangular spring insertion recess 6 as shown in FIG.
And the spring 1 acting on the rotating cylinder.
Although not shown, a hole into which one end of the spring 15 is inserted is provided at a position where the guide groove 5 can give an effect of turning and pushing the shaft stopper crown 12 rightward with respect to the shaft tip with the elasticity of 5. It is provided on the inner step 16 and is inserted there. The shaft cylinder inner step 16 is formed thick to form the insertion hole, as shown in FIG.

As shown in FIG. 10, the knob shaft 13 passed through the hole of the knob crown 14 is passed through the ring groove 24 and the cylindrical groove 2 and screwed into the knob shaft hole 18, so that the knob shaft 13 and the stopper are fixed. When the 11 is fixed, the knob crown 14 comes out on the rotating ring groove 24.
The shaft stopper crown 12 can slide along the guide groove 5 as the knob crown moves forward and backward. FIG. 10 shows a state in which the top of the shaft stopper is shifted to the left toward the axis of the guide groove 5 due to the right rotation biasing force applied to the rotating cylinder.

When one of the knob crowns 14 connected to the retracted core receiver is pressed in the tip direction of the shaft with one fingertip while holding the writing posture while holding the shaft, the knob shaft 13 moves forward in the cylindrical groove 2, The axle top 12 turns the rotating cylinder counterclockwise while advancing along the Z-shaped guide groove 5, and the axle top 12 advances to the forefront. When the core is set so that the tip of the core 22 is exposed to the shaft opening at the time when the core is locked in the locking lateral groove 20 in front of the guide groove, writing becomes possible. The top of the shaft stopper of the other core bearing that has receded is retracted into the rear evacuation lateral groove 20 during the left rotation of the rotary cylinder, and the top of the knob crown that has been advanced reaches the engaging lateral groove 20 and moves rightward. When locked to the rotating rotary cylinder, the retracted knob crown top returns from the retracted lateral groove.

When the other knob crown connected to the core receiver that has been retracted is advanced, the rotary cylinder rotates, and when the axle top 12 reaches halfway through the Z-shaped guide groove, the core is inserted into the shaft opening. The protruding shaft stopper crown 12 is disengaged from the locking lateral groove 20, and is automatically retracted by the spring 10; instead, the shaft crown head of the knob crown which has been advanced is locked in the locking lateral groove, and the replacement core is replaced. It becomes possible to write.

As shown in FIG. 11, the Z-shaped guide groove is composed of a locking horizontal groove 20 and a retreating horizontal groove 20a, and a slope corresponding to the horizontal width of the locking horizontal groove is provided at the bottom half of the Z-shaped vertical drawing. Accordingly, when the advancing shaft stopper crown 12 reaches the middle of the guide groove, the locked shaft stopper crown is disengaged from the locking lateral groove. If the axle top 12 is advanced to the middle of the Z-shaped guide groove and returned, the cores are all stored in the axle cylinder.

When the rotating ring 19 is rotated to the left with respect to the core, all the knob crowns 14 pass through the knob hole 25 and are hidden under the rotating ring. When writing, turning the rotating ring to the right exposes the knob crown to the ring recess, and while holding the cylinder shaft, pushes it forward with one fingertip to pull out the core.

In writing, the thickness and the angle of curvature of the rotating ring are adapted to the angle of the fingertip holding the cylinder shaft, and serve to facilitate gripping and writing of the shaft. The rubber ring 29 fitted on the ring tip cylinder slightly presses between the end of the rotating ring and the step of the shaft tip cylinder, and provides resistance so that the ring does not rotate freely.

There is another embodiment as shown in FIG. 14 from the viewpoint of simplifying the manufacturing of the present invention. Core support 7,
The shaft stopper 11, the shaft stopper crown 12, and the knob shaft 13 may be integrally formed, and the knob shaft may be put on the rotary ring recess, and then the knob crown 14 may be screwed or adhered to the knob shaft. Also, the rear end of the rotating ring is not bent in order to make it easier to remove the work mold. In addition, a hard rubber crown 29
If the mark is attached, the ring tip tube at the tip of the rotating ring may not be provided. Further, if the rotary cylinder stopper 30 is screwed to the inside of the cylindrical shaft toward the tip of the rotary cylinder 3, the rotary cylinder can be set at a fixed position. In order to attach a spring to the rotating cylinder, as shown in FIG. 15, a horizontally elongated thin hole is provided along the cylinder at the bottom of the rotating cylinder, the spring 15 is passed through the hole, and then inserted into the recess 6 of the rotating cylinder. The mounting of the spring is ensured.

Since the present invention is configured as described above, the following effects can be obtained. By providing the knob crown of the knob shaft operated to change the tip on the grip part of the pen shaft, to replace the tip, without continuing to change the axis as in the past, while continuing to write, You can move the knob crown forward by just moving one fingertip a little, and change the core tip, interrupt the writing and change the axis as usual, operate the shaft head, rotate it, There is no need to waste labor and time for changing the core. A rotary ring 19 is provided at the grip portion of the pen shaft. During writing, the thickness and curvature of the rotary ring are adapted to the angle of the fingertip gripping the shaft, so that the grip of the shaft is ensured and writing is easy. When not writing, turn the rotating ring and put all knob crowns under the ring,
The knob provided on the shaft prevents contact between the knob and an external object, and the appearance is good. According to the functions and embodiments of the present invention, the retraction of the knob shaft is automatically performed by the force of the spring, and the tip is replaced instantly by simply pressing the knob shaft. It can be done at a speed that cannot be expected with conventional writing instruments.

[Brief description of the drawings]

FIG. 1 is a view of a pen shaft being held.

FIG. 2 is a partial side view of a shaft cylinder obtained by cutting a shaft cylinder in half along a line of one cylinder groove;

FIG. 3 is a perspective view of a part of a rotating cylinder and a shaft cylinder on which a core receiving cylinder is mounted.

FIG. 4 is a perspective view of a rotating cylinder.

FIG. 5: Knob shaft

FIG. 6: Crown of knob

FIG. 7

FIG. 8

FIG. 9: Rotating cylinder and spring

FIG. 10 is a cross-sectional view of a shaft cylinder cut at a right angle in a length direction at a knob hollow portion and viewed from the rear.

FIG. 11 shows a modified Z-shaped guiding groove.

FIG. 12: Rotating ring and ring tip tube

FIG. 13 shows the arrangement relationship between the ring recess and the knob crown when the rotary ring is viewed from the rear when three knobs are provided.

FIG. 14 shows another embodiment of the present invention. FIG. 4 is a partial side view of the shaft cylinder obtained by cutting the shaft cylinder in half along a line of one cylinder groove. (The cut portion of the rotating cylinder is indicated by a thick solid line.)

FIG. 15 shows another alternative of the rotating cylinder and the spring.

[Explanation of symbols]

 Reference Signs List 1-a shaft cylinder 1-b rotating ring mounting cylinder part 2 cylinder groove 3 rotating cylinder 4 core receiving hole 5 guide groove 6 rotating cylinder concave part (spring insertion concave part) 7 core receiver 8 shaft fixing projection 9 spring retaining projection 10 spring 11 Shaft stop 12 Shaft stop crown 13 Knob shaft 14 Knob crown 15 Spring 16 Shaft tube inner step 17 Rear end of shaft tip tube 18 Knob shaft hole 19 Rotating ring 20 Locking lateral groove 20a Retreating lateral groove 21 Shaft tip tube 22 Core 23 Ring recess 24 Ring groove 25 Knob hole 26 Ring tip cylinder 27 Shaft cylinder outer step 28 Shaft tip cylinder step 29 Rubber ring 30 Rotating cylinder stopper 31 Spring hole

Claims (1)

[Claims] 1. A writing instrument structure in which a center feeding knob crown (14) is provided on a barrel holder and a rotary ring (19) covering the barrel holder covers or exposes the knob crown.