JPH11277981A - Lead tip replaceable type pen barrel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To replace a lead tip at once while continuing writing by eliminating an inconvenience of a time loss of pressing a head of a pen holder by stopping the writing to replace the tip during the writing in a conventional ballpoint pen. SOLUTION: Grooves 2 of number corresponding to number of lead shafts are provided on a grip of a pen barrel. A knob 4 of a shaft clamper 3 coupled to a lead receiver 5 for holding a lead is projected to the groove. When the knob 4 is pressed by a finger during writing to be slid and advanced along the groove, the knob 4 is locked to a recess 7 of an end of the groove, and the lead tip is projected from a barrel port. When a knob 4a of the other shaft clamper 3a is pressed down, a lead side protrusion 9a of a lead receiver 5a coupled to the shaft clamper presses up the former clamper 3 to unlock the knob 4. The knob is retracted by a spring 10, and hence the lead tip is instantaneously replaced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a pen shaft capable of changing the tip with a fingertip while writing.

[0002]

2. Description of the Related Art Conventionally, replacement of a multicolored core such as a ball-point pen is performed by temporarily stopping writing and pressing the head of an upper core such as a ball-point pen.

[0003]

In a conventional ball-point pen or the like, the head of the upper part of the ball-point pen or the like must be pressed each time in order to change the tip during writing. You must stop writing each time you change places,
It was troublesome and inconvenient to change the tip when writing in a hurry. The present invention allows the tip to be changed by only slightly moving one of the finger tips while writing, thereby temporarily stopping writing for the tip replacement and eliminating inconvenience and time loss that had to be changed. The purpose is to eliminate.

[0004]

In order to achieve the above object, a cylindrical groove is provided in the grip portion, a knob is formed on the shaft stop, the knob is protruded into the cylindrical groove, and the knob is slid along the cylindrical groove. . The axle is connected to a core holder that holds the core. When the knob is provided with a recess at the tip of the cylinder groove and the knob is advanced to the tip of the cylinder groove, the knob falls into the recess and is locked at the tip of the cylinder groove. A protrusion is formed on the cylinder core side of each of the shaft stoppers and the core bearing, and the knob which has fallen into the recessed portion and is locked at the tip of the cylinder groove is provided on the cylinder core side of another advancing core bearing. The knob is pushed up by the projection, the knob for stopping the shaft is disengaged from the engagement at the tip of the cylindrical groove, and the knob slides back in the cylindrical groove by the force of the spring. With the above structure, if you move the knob of the tip you want to put out on the shaft opening with your fingertip while writing, the tip that came out retreats and the tip you want to put out instantly replaces the tip you want to put out Can be done.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described with reference to the drawings based on embodiments. In FIG. 1, in one embodiment of the multicolor core, a knob 4 of a shaft stopper 3 is protruded in a cylindrical groove 2 provided in a grip portion 1. The knob 4a is a knob for stopping the shaft whose core tip is retracted.

FIG. 2 is a sectional view in which the shaft cylinder is cut at the surfaces of the two-color core cylinder grooves 2 and 2a, and half of the shaft cylinder is peeled off. After the knob 4 falls into the recess 7 at the tip of the cylindrical groove 2, the knob 4 is pushed by a spring and locked on the rear surface 72 of the recess. The other knob 4
In a, the shaft stopper groove 32 slides along the cylindrical groove 2a and is retracted to the end of the cylindrical groove. The core bearings 5 and 5a are connected to the shaft stoppers 3 and 3a by bars 6 and 6a, respectively, by bar connecting projections 11 shown in FIG. 4, and the bars can be rotated with the connecting portion as a fulcrum.

[0007] The core 14 is a shaft hole plate 13 fixed to the lower part of the shaft cylinder.
The core hole 12b of the core bearings 5 and 5a passes through the core holes 12b that match the core provided on the shaft holes and the coiled springs 10 and 10a fixed to the shaft hole disc, and is fixed to the shaft holes 12a (FIG. 4). The core receivers 5 and 5a are always pushed in the retreating direction by springs 10 and 10a. Although not shown, the core 14 is provided with a convex portion on one surface thereof so that the core 14 can be fixed to the core hole of the core receiver, and the shaft is fixed by the knob to the rear surface of the concave portion 7, 7a. It is set so that the tip of the core comes out of the shaft opening when locked at 72.

FIG. 3 is a perspective view of the cylindrical groove 2 and the concave portion 7.
The lower sides of both side surfaces 71, 71 are inclined inward, respectively, to prevent the knob 4 from falling. The recessed rear surface 72 of the recessed portion 7 on the head side of the barrel is formed at an acute angle A (FIG. 2) from the surface of the barrel toward the inside of the barrel, and the rear end 41 of the knob pressed by a spring.
The locking of the knob is ensured in accordance with the inclination angle of (FIG. 5).

FIG. 4 is a perspective view in which the shaft stopper 3 and the core bearing 5 are connected by a bar 6. As shown in the figure, bars 6, 6 extend from both side surfaces of the shaft stopper 3, and bar connecting projections 11, 11 provided on the tip side thereof are fitted into shaft holes provided on both side surfaces of the core bearing 5. It is supposed to. Therefore, the shaft stopper 3 can rotate around the shaft hole of the bearing 5 as shown in FIG. A shaft stopper groove 32 is formed between the base 31 of the shaft stopper 3 and the knob 4 so as to fit into the cylindrical groove. The upper side of bar 6 is the base 3 of the stopper.
1 is formed in contact with the upper end of the shaft 1, and when the shaft stopper is pushed up, the upper side of the bar is restrained by the inner surface of the shaft cylinder, so that the shaft stopper groove 32 is properly fitted to the shaft groove 2 (FIG. 2). Come to the position to be merged. The surface 51 on the inner surface of the shaft cylinder of the core bearing is a curved surface that fits the inner surface of the shaft cylinder.

FIG. 5 is a side view of the shaft stopper 3. When the knob 4 falls into the recess and is pushed by the spring, the rear end 41 of the knob
Is matched with the angle of inclination A of the rear side 72 of the recess (FIG. 2) to ensure locking of the knob.

FIG. 6 is a side view of the shaft stopper 3 as viewed from the bar side. The two side surfaces 42 of the knob 4 are inclined inward, and the two side surfaces 42 of the knob that have fallen into the recess 7 are adapted to the inclination of the two sides 71 of the recess, thereby preventing the knob from falling. The core hole 12 is formed wide in the direction of the cylinder center so that the core hole does not affect the orientation of the core 14 when the shaft stop moves from the recessed portion to the cylinder groove and vice versa.

As a method of attaching the stopper to the barrel, the width of the base 31 is formed to be narrower than the width between the lower ends of the side surfaces 41, 41 of the knob so that the knob can be inserted into the barrel through the opening of the recess. I do. The bar is inserted into the recess from the tip side of the bar, and the knob is inserted to a position facing the recess, and the connecting protrusions 11 of the bar 6 are fitted into the shaft holes on both sides of the core receiver placed in the shaft cylinder. Combine. Alternatively, the knob is formed separately from the base portion 31 and the groove 32 of the shaft stop, and the shaft stop groove 32 protruding from the inside of the shaft cylinder to the recessed portion.
Then, the knob is fitted from the outer surface of the barrel. Although not shown, the slot for inserting the springs 10 and 10a is
It is preferable that the springs are mounted on the core holders 3 and the core receivers 5 and 5a and inserted into the slots.

With the above structure, the replacement of the pen tip is performed as follows with reference to FIG. When the knob 4a is advanced by a finger, the core receiver 5a also advances, and the core-side protrusion 9a of the core receiver is supported on the inner surface of the shaft cylinder by a surface 51 on the inner surface of the shaft cylinder that matches the inner surface of the shaft cylinder.
When the cylinder core side projection 8 of the shaft stopper 3 is pushed up and the upper side of the bar 6 is restrained by the inner surface of the shaft cylinder, the shaft stopper groove 32 comes to a position where it is accurately fitted into the cylinder groove 2 and at the same time, the recessed portion is formed. The knob 4 released from the locking of the rear side 72 is pushed by the spring 10 and slides along the cylindrical groove 2 to retreat instantaneously to the end of the cylindrical groove, and the core tip is stored in the cylinder while the knob is advanced. 4a falls into the recess 7a, is pushed by the force of the spring, is locked on the rear surface 72 of the recess, and the core fixed to the core receiver 5a comes out of the shaft opening. Knob 4
The rear end 41a of the knob 4a is properly locked by the force of the spring 10a to the rear surface 72 of the recessed portion having the inclination angle A, and both side surfaces 42, 42 of the knob 4a are adapted to both side surfaces 71, 71 of the recessed portion 7a. And
As a result, the core receiver 5a is maintained at a fixed position, and withstands the writing force of the core tip. When the core is removed, the front end of the knob is restrained at the front of the recess so that the knob can be removed. In order to insert a new core, the shaft stopper is retracted and locked at the rear end of the cylindrical groove, and the core can be inserted into a core support supported at a fixed position by fitting the shaft stopper groove into the cylindrical groove.

In the case of three-color cores or more, the width of the shaft stopper and the core receiver is formed to be narrow, and a pen-tip replacement type pen shaft having the above-mentioned functions and changing the core tip with a fingertip while writing is manufactured. be able to.

[0015]

Since the present invention is configured as described above, it has the following effects. Although a knob for stopping the shaft operated to change the tip of the core is provided on the grip portion of the pen shaft, it does not obstruct the grasping finger at all. By providing a knob on the grip near the position of the finger to be gripped,
By simply moving a finger a little while continuing to write, you can operate the knob to change the core tip, it is necessary to interrupt the writing, change the axis and operate the head at the top of the barrel as in the past In addition, the tip of the present invention can be changed instantaneously by the mechanism of the present invention, so that the tip can be easily changed even during writing, writing can be performed in a different color, and notes and underlines can be easily written.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state in which a pen shaft is gripped.

FIG. 2 is a side view in which the barrel is cut along a barrel groove surface of a two-color core pen barrel, and a half of the barrel is removed.

FIG. 3 is a perspective view of a cylindrical groove and a recess.

FIG. 4 is a perspective view in which a shaft stopper and a core bearing are connected by a bar.

FIG. 5 is a side view of the shaft stopper.

FIG. 6 is a side view of the shaft stopper viewed from a bar side.

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Pen shaft grip part 2 2a Cylindrical groove 3 3a Shaft stop 31 Shaft stop base 32 Shaft stop groove 4 4a Knob 41 Rear end of knob 42 Both sides of knob 5 5a Core receiver 51 Surface of core receiver inner surface of cylinder core 6 6a Bar 7 7a Depressed portion 71 Depressed side surface 72 Depressed rear surface 8 8a Tube-side projection of shaft stop 9 9a Tube-side protrusion of core support 10 10a Spring 11 Bar connection protrusion 12 Core hole 12a of shaft stop Core hole of core bearing 12b Core hole of shaft hole machine 13 Shaft hole machine 14 core A Angle between the surface of the shaft cylinder and the rear surface of the recess

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[Procedure amendment]

[Submission date] October 27, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

FIG. 3 is a perspective view of the cylindrical groove 2 and the recess 7, and the lower sides of both sides 71, 71 of the recess 7 are inclined inward, respectively.
Knob 4 is prevented from falling. The recessed rear surface 72 of the recessed portion 7 on the rear side of the barrel is formed at an acute angle A (FIG. 2) from the surface of the barrel toward the inside of the barrel, and the rear end 41 of the knob pressed by a spring.
The locking of the knob is ensured in accordance with the inclination angle of (FIG. 5).

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

FIG. 4 is a perspective view in which the shaft stopper 3 and the core bearing 5 are connected by a bar 6. As shown in the figure, the bars 6, 6 extend from both side surfaces of the shaft stopper 3, and the bar connection protrusions 11, 11 provided on the distal end side thereof fit into the shaft holes provided on both side surfaces of the core receiver 5. It has become. Therefore, the shaft stopper 3 can rotate around the shaft hole of the bearing 5 as shown in FIG. A shaft stopper groove 32 is formed between the base 31 of the shaft stopper 3 and the knob 4 so as to fit into the cylindrical groove. The upper side of the bar 6 is formed in contact with the upper end of the base 31 of the shaft stopper. When the shaft stopper is pushed up, the upper side of the bar is restrained by the inner surface of the shaft cylinder, so that the shaft stopper groove 32 is formed in the shaft groove 2. (FIG. 2). The surface 51 on the inner surface of the shaft cylinder of the core bearing is a curved surface that fits the inner surface of the shaft cylinder. Although not shown, an upside-down trapezoidal convex portion running in the front-rear direction of the shaft is protruded above the surface 51 on the inner surface side of the shaft cylinder of the core bearing, and a trapezoidal concave portion suitable for it is provided on the inner surface of the shaft cylinder, and both portions are fitted together. Thus, the movement of the core receiver when moving can be more stabilized.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction contents]

As a method of attaching the stopper to the barrel, the width of the base 31 is formed to be smaller than the width between the lower ends of both side surfaces 42, 42 of the knob so that the base can be inserted into the barrel through the opening of the recess. I do. The bar is inserted into the recess from the tip side of the bar, and the knob is inserted until the knob faces the recess, and the connection protrusions 11 of the bar 6 are fitted into the shaft holes on both sides of the core receiver placed in the shaft cylinder. .
Alternatively, the knob is formed separately from the base portion 31 and the groove 32 of the shaft stop, and the shaft stop groove 32 protruding from the inside of the shaft cylinder to the recessed portion.
Then, the knob is fitted from the outer surface of the barrel. Although not shown, the slot for inserting the springs 10 and 10a is
It is preferable that the springs are mounted on the core holders 3 and the core receivers 5 and 5a and inserted into the slots.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction contents]

With the above structure, the replacement of the tip of the pen shaft is performed as described below with reference to FIG. When the knob 4a is advanced by a finger, the core bearing 5a also advances, and the cylindrical core side projection 9a of the core bearing is stopped while being supported on the inner surface of the barrel by a surface 51 on the inner surface of the barrel that matches the inner surface of the barrel. The cylinder core side projection 8 of No. 3 is pushed up. As aforementioned,
When an inverted trapezoidal projection is provided at the upper part of the inner cylinder side surface 51 of the core bearing and a trapezoidal concave part adapted to the projection is provided on the inner surface of the barrel, more stable movement of the core bearing by fitting both parts. Then, the cylinder core side projection 9a pushes up the cylinder core side projection 8 of the shaft stopper 3. When the upper side of the bar 6 is restrained on the inner surface of the shaft cylinder, the shaft stopper groove 32 comes to a position where it is accurately fitted into the cylinder groove 2, and at the same time, the knob 4 which is disengaged from the locking of the rear side 72 of the recessed part is a spring. 10, slides the cylinder groove 2 and retreats instantly to the end of the cylinder groove,
The tip is housed in the cylinder, while the knob 4a, which has been advanced, falls into the recess 7a, is pushed by the force of a spring, is locked on the rear surface 72 of the recess, and the tip fixed to the center receiver 5a is a shaft. I say it. The rear end 41 of the knob 4a is accurately locked by the force of the spring 10a on the concave rear surface 72 having the inclination angle A, and the both side surfaces 42, 42 of the knob 4a are also connected to the both side surfaces 71, 71 of the concave portion 7a.
71, whereby the core receiver 5a is kept in place and withstands the writing force of the core. When the core is removed, the front end of the knob is restrained at the front of the recess so that the knob can be removed. In order to insert a new core, the shaft stopper is retracted and locked at the rear end of the cylindrical groove, and the core can be inserted into a core support supported at a fixed position by fitting the shaft stopper groove into the cylindrical groove.

Claims (1)

[Claims] 1. A pen tip replacement type pen shaft, wherein: (a) a cylinder groove is provided in a grip portion; (b) a knob is formed on a shaft stopper; the knob protrudes into the cylinder groove; Slide. D. The shaft stopper is connected to a core holder for holding the core. E. When the knob is advanced to the tip of the cylinder groove, the knob falls into the recess at the tip of the cylinder groove and is locked at the tip of the cylinder groove. F, a projection is formed on the cylinder core side of each shaft stopper and center bearing, and the cylinder core side projection of the shaft stopper, which falls into the recess and is locked with the knob, is the The knob is pushed up by the protrusion on the cylinder core side of the receiver, and the knob of the shaft stop is released, and the knob slides back in the cylinder groove by the force of the spring. A tip-changing pen shaft that has the above mechanism and changes the tip with your finger while writing.