JP2001232989A - Knock type double-refill writing tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a knock type double-refills writing tool, not necessary to interrupt writing and re-hold the barrel of the writing tool while capable of writing immediately by another pen body unit upon switching from one pen body unit into the other pen body unit. SOLUTION: The knock type double-refills writing tool is constituted to a barrel 10, on which two pieces of window holes 11 are formed at parts against which finger tips are abutted upon writing, two pieces of refills 4A, 4B, received in the barrel, a retaining projection 52, a retaining releasing projection 51, knock units 6A, 6B, which are projected out of the window holes of the barrel, and a pair of operating pieces 5A, 5B, which are arranged in parallel to the refills and are connected at the tail end units of the refills to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a knock-type two-core type in which one pen body portion of two refills housed in a barrel is selectively projected from a tip end opening of the barrel by a knocking operation for writing. It concerns writing instruments.

[0002]

2. Description of the Related Art A knock-type two-core writing instrument contains two refills, for example, a black ball-point pen refill and a red ball-point pen refill, which are ejected toward the tail end, and are operated at the tail end of the refill. Each child is attached. A pair of window holes are formed at the tail end of the barrel so as to face each other, and a knock portion of a black actuator and a knock portion of a red operator protrude radially from the window holes. Then, for example, when the knock portion for black is advanced with a fingertip, the black ballpoint pen feels forward and the black pen body portion protrudes from the distal end opening of the barrel. It is displaced toward the center of the barrel, and the locking portion of the actuator engages with the locking step formed inside the barrel, so that writing can be performed with a black ballpoint pen.

When one of the knock portions for red is advanced from a state where the pen body portion of the black ball-point pen projects from the tip opening of the barrel, the red ball-point refill advances.
When the red actuator is displaced toward the center of the shaft cylinder, it abuts against the black actuator to release the engagement with the locking step,
The black ballpoint pen feel retreats. If the knocking operation is stopped in this state, the red ballpoint pen feels also retreats and both pen bodies sink into the barrel, but when the knocking part for red is further advanced from this state, the red pen body is The locking portion of the red actuator protrudes from the opening at the tip end of the cylinder, engages with a locking step formed inside the barrel, and can be written with a red ballpoint pen.

[0004]

As described above, since the knock portion of the actuator protrudes from the window hole formed at the tail end side of the barrel, for example, the red ball-point pen When switching to writing, it is necessary to interrupt the writing, hold the barrel, and then perform the knocking operation.

Therefore, according to the present invention, when switching to the pen body part of the other refill while writing with the pen body part of one refill, it is not necessary to interrupt the writing and to re-hold the barrel, and the other hand does not need to be immediately stopped. A knock-type two-core writing instrument capable of writing with a pen body, and a knock-type two-point writing tool that allows the pen body to be easily immersed in a shaft cylinder when writing is stopped. It is intended to provide a core writing instrument.

[0006]

In order to achieve the above object, a knock type double-core writing instrument according to claim 1 is characterized in that a shaft cylinder having two window holes formed at a portion where a fingertip abuts during writing, and a return pipe. It has two refills housed in the shaft cylinder in a state where the spring is repelled to the tail end side by a spring, a locking projection, a locking release projection, and a knock portion protruding from a window hole of the shaft cylinder. It consists of a pair of actuators arranged in parallel with the refill and connected to the refill at the tail end, respectively, and when the knock portion of one of the operators is advanced, one refill advances with the one of the operators, When the pen body portion of the refill projects from the distal end opening of the barrel, the locking projection of the actuator engages with a locking step formed in the barrel to enable writing. When the knock portion of the actuator is advanced, the other The unlocking projection of the moving element abuts against the unlocking projection of one of the actuators in the writing position to release the engagement between the locking projection of this actuator and the locking step, thereby bringing the locking position to the writing position. When one of the refills is retracted, the pen body portion of the other refill that moves forward projects from the tip opening of the barrel, and the locking projection of the other actuator engages with a locking step formed in the barrel. To be writable.

A knock type double-core writing instrument according to claim 2 is
In the knock-type two-core writing instrument according to claim 1, a tail plug is disposed at the tail end of the barrel so as to be able to move back and forth, and the pen body part of one of the refills projects from the tip opening of the barrel and allows writing. When the tail plug is knocked and advanced, the tail edge of the tail plug abuts the actuator at the retracted position and advances, and the unlocking projection of this operator is the unlocking projection of the operator at the writing position. Then, the engagement between the locking projection of the actuator at the writing position and the locking step is released so that the refill at the writing position is retracted.

[0008]

Embodiments of the present invention will be specifically described below with reference to the drawings. 1 and 2 are sectional views showing an embodiment of the first aspect of the present invention, and show sectional views in which phases are different from each other by 90 °. In FIG. 1 and FIG. 2, two window holes 11 are formed in a shaft cylinder 10 formed of a synthetic resin.
Are formed facing each other. The position of the window hole 11 is a portion to which a fingertip contacts at the time of writing. A tip end 20 having a tip end opening 21 is screwed to a tip end of the barrel 10, and a tail plug 30 integrated with a clip 39 is attached to a tail end of the barrel 10.
Is fitted. FIGS. 3 and 4 show the inside of the barrel 10.
As shown in FIG. 5, a vertical rib 15 is formed, and the tip of the vertical rib 15 is the locking step portion 12. Further, a refill holding portion 13 in which two refill insertion holes are formed is formed in the middle of the inside of the barrel 10. In addition, the front end 20 is the barrel 10
It may be molded integrally with
“The tip opening of the shaft cylinder from which the pen body portion protrudes”
The meaning of the tip opening 21 is as follows.

In the barrel 10, two ball-point pen refills 4A and 4B each having a pen body portion 41 at the tip and filled with oily black ink and red ink, respectively, are accommodated. It is inserted into the refill insertion hole of the holding portion 13. Refills 4A and 4B
It is made of a synthetic resin pipe and can be bent. The refills 4 </ b> A and 4 </ b> B are repelled by the return spring 70 in the tail end direction.

[0010] Within the shaft cylinder 10, operating elements 5A and 5B having a cross section of four semicircles are arranged in parallel with the refills 4A and 4B. A locking projection 52 and a locking release projection 51 are formed on the actuators 5A and 5B, respectively. Connecting piece 53 extending radially at the top of actuators 5A, 5B
Are formed with connection projections 54 in the axial direction, and the connection projections 54 are press-fitted into the tail end openings of the refills 4A and 4B, respectively. That is, the actuator 5A and the refill 4
A, the actuator 5B and the refill 4B are connected at the tail end thereof.

Knock portions 6A, 6B are provided on actuators 5A, 5B.
Are integrally connected to each other, and knock portions 6A, 6B
Protrudes from the window hole 11 of the barrel 10. Refill 4
A and 4B are repelled in the tail end direction by the return spring 70. Therefore, when the pen body portions 41, 41 are immersed in the barrel 10, the actuators 5A, 5B also retract, and the knock portion 6A. , 6B abut the tail edge of the window hole 11.

Thus, for example, when writing with the pen body portion 41 of the refill 4B, the knock portion 6B is advanced with a fingertip. At this time, since a radial force acts on the actuator 5B, the locking projection 52 of the operator 5B is
5, the pen body 41 of the refill 4B protrudes from the front end opening 21 of the front opening 20, as shown in FIG. Then, the locking projection 52 engages with the locking step 12 which is the end of the vertical rib 15. As a result, the actuator 5B is locked, and writing can be performed with the pen body 41 of the refill 4B.

When switching to writing with the pen body 41 of the refill 4A while writing with the pen body 41 of the refill 4B, the knock part 6A is advanced with the fingertip.
That is, the operator 5A is advanced, but in the process of the operator 5A moving forward, the unlocking projection 51 of the operator 5A abuts the unlocking projection 51 of the operator 5B in the writing position, and the operator 5B Is displaced in the radial direction. Therefore, the engagement between the locking projection 52 of the actuator 5B and the locking step portion 12 is released, the refill 4B is retracted by the elastic force of the return spring 70, and the pen body portion 41 is sunk into the shaft cylinder 10. .

The pen body 41 of the refill 5B is
When the knocking of the knocking portion 6A is released at the time when the knocking portion 6A is immersed, the refuel 4A also retreats and returns to the state shown in FIG.
The pen body portion 41 of A protrudes from the distal end opening 21 of the front opening 20, and the locking projection 52 of the actuator 5A engages with the locking step portion 12. As a result, the actuator 5A is locked and the refill 4
Writing is possible with the pen body 41 of A.

At this time, since the position of the window hole 11 of the barrel 10 is the portion where the fingertip comes into contact during writing, the knock portions 6A and 6B protruding from the window hole 11 are also located at the portion where the fingertip comes into contact during writing. I have. Therefore, the switching operation from the pen body 41 of the refill 4B to the pen body 41 of the refill 4A can be performed without interrupting the writing and holding the barrel.

FIG. 6 is a sectional view of a second embodiment of the present invention. In FIG. 6, a small diameter portion 31 is formed in the tail plug 30, and the small diameter portion 31 is inserted into the tail end opening of the barrel 10 so as to be movable back and forth. Here, the stroke of the back and forth movement of the tail plug 30 corresponds to the locking release projection 5 of the actuator 5B at the writing position.
1 and unlocking projection 51 of actuator 5A at pen body position
Is equal to the distance. A projection 32 is formed on the small diameter portion 31, and the projection 32 is fitted into the slit portion 14 of the barrel 10 so that the tail plug 30 does not fall off. The tip of the tail plug 30 is located at the position of the actuator 5 at the pen body position.
A is in contact with the top of A.

Thus, when stopping writing, the tail plug 30
Knock on top of to advance. When the tail plug 30 is completely pushed, the locking release projection 5 of the actuator 5B at the writing position is released.
1. An unlocking projection 51 of the actuator 5A located at the pen body position
As described above, the pen body portion 41 of the refill 5B is immersed in the barrel 10 as described above. Then, when the knock is released, the actuator 5A also moves backward to the state shown in FIG.

As described above, when the writing is interrupted, according to the first aspect of the present invention, in the process of knocking the knock portion 6A, the pen body portion 41 of the refill 5B is knocked.
It is necessary to release the knocking of the knocking portion 6A at the time of immersion in the barrel 10, and it is troublesome to judge the time of releasing the knocking. However, according to the invention of claim 2, when the tail plug 30 is pushed off, the refill 5B Since the pen body portion 41 of FIG. 1 is immersed in the barrel 10, there is no need to determine the time of knock release.

[0019]

As described above, according to the knock-type two-core writing instrument of the present invention, when switching to the other pen body part while writing with one pen body part of the refill,
There is no need to interrupt writing and hold the barrel again, and writing can be immediately performed with the other pen body. Further, when writing is stopped, the pen body can be easily immersed in the barrel.

[Brief description of the drawings]

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

FIG. 2 is a sectional view in which the phase is different from that of FIG. 1 by 90 °.

FIG. 3 is a sectional view taken along line AA of FIG.

FIG. 4 is a sectional view taken along line BB in FIG. 2;

FIG. 5 is a cross-sectional view of a state where a pen body is projected.

FIG. 6 is a sectional view of an embodiment of the invention according to claim 2;

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 shaft cylinder 11 window hole 12 locking step portion 13 refill holding portion 14 slit portion 15 vertical rib 20 leading end 21 tip opening 30 tail plug 31 tail plug small diameter portion 32 retaining protrusion 39 clip 4A, 4B refill 41 pen body Part 5A, 5B Actuator 51 Lock release protrusion 52 Lock protrusion 53 Connection piece 54 Connection protrusion 6A, 6B Knock part 70 Return spring

Claims (2)

[Claims] 1. A shaft cylinder having two window holes formed at a portion where a fingertip abuts during writing, and two shaft holes housed in the shaft cylinder in a state of being repelled to a tail end side by a return spring. A pair of actuators having a refill, a locking projection, a locking release projection, and a knocking part protruding from a window hole of the barrel, and arranged in parallel with the refill and connected to the refill at a tail end, respectively. When the knock portion of one of the actuators is advanced, one of the refills advances together with the actuator, and when the pen body of the refill projects from the distal end opening of the barrel, the locking projection of the actuator is disengaged. It becomes possible to write by engaging with the locking step formed in the shaft cylinder. When the knocking part of the other actuator is advanced from this state,
The unlocking projection of the other actuator abuts the unlocking projection of one of the operators in the writing position to release the engagement between the locking projection of the operating element and the locking step to write the writing position. As one of the refills retreats, the pen body of the other refill that advances forward projects from the tip opening of the barrel, and the locking projection of the other actuator engages with the locking step formed in the barrel. A knock-type two-core writing instrument, which is capable of writing when engaged. 2. A tail plug is disposed at the tail end of the barrel so as to be able to move back and forth, and the pen body of one of the refills projects from the tip end opening of the barrel to allow writing and knocks on the tail plug. When the tail plug is moved forward, the tip edge of the tail plug abuts on the operator at the retracted position and moves forward, and the unlocking projection of the operator abuts the unlocking projection of the operator at the writing position. 2. The knock-type two-core writing instrument according to claim 1, wherein the engagement between the locking projection of the actuator at the writing position and the locking step is released to retreat the refill at the writing position.