JP2001219690A - Retractable twin lead writing utensil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a retractable twin lead writing utensil, in which the writing immediately with another pen body part becomes possible without interrupting its writing for changing the manner of holding a barrel, when the changing-over to the other pen body part in the midway of the writing with one pen body part is executed. SOLUTION: This writing utensil consists of a barrel 10, in the portion abutted with the tip of a finger during writing of which a window hole 11 is formed, two refills 4A and 4B housed in the barrel, depressors 5A and 5B, which depress the refills forwards, and an actuating shaft 61, which project beyond the window hole of the barrel. After abutting the actuating shaft against the apex surface of one depressor through the pivoting of the actuating shaft to either left or right direction, the actuating shaft is advanced, resulting in projecting the pen body part 41 of one refill through the tip opening 21 of the barrel so as to realize the writing with the pen body.

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 piece is attached. A pair of window holes are formed at the tail end of the barrel so as to face each other, and the knock portion of the black operating piece and the knock portion of the red operating member project 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 tip opening of the barrel. It is displaced toward the center of the cylinder, and the locking portion of the operation piece engages with the locking step formed inside the shaft cylinder 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 operating piece is displaced toward the center of the barrel, it abuts the black operating piece 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 operating piece protrudes from the opening at the distal end of the barrel, engages with a locking step formed inside the barrel, and allows writing with a red ballpoint pen.

[0004]

As described above, since the knock portion of the operation piece projects from the window hole formed at the tail end side of the barrel, for example, while writing with a black ballpoint pen, writing with the red ballpoint pen is performed. In the case of switching to, it is necessary to interrupt the writing and to carry out the knocking operation after regaining the barrel.

Therefore, according to the present invention, when the pen body of one refill is switched to the pen body of the other refill in the middle of writing, there is no need to interrupt the writing and re-hold the barrel, and the other pen body is immediately replaced. It is an object of the present invention to provide a knock-type two-core writing instrument that can be written by a part.

[0006]

In order to achieve the above object, a knock-type two-core writing instrument according to the present invention has a window hole formed at a portion where a fingertip abuts at the time of writing, and has both ends of the window hole. A shaft cylinder having a pair of locking portions formed therein, and a housing 2 housed in the shaft cylinder in a state of being resiliently pushed toward the tail end by a return spring.
The book refill and the semicircular actuator insertion portion are formed in the axial direction, and the refills are respectively inserted and a pair of pressing elements capable of pressing the refill forward, and a radial direction protruding from the window hole of the shaft cylinder. An operating shaft having an operating shaft and being rotatably inserted into the operating member insertion portion, the operating shaft protruding from the window hole of the barrel is rotated in one of left and right directions to press one of the operating shafts. The refill is moved forward together with the pusher by bringing the operating shaft forward and engaging with the locking portion of the window hole, and the pen body of the refill is moved from the distal end opening of the shaft cylinder by bringing the operating shaft into contact with the locking portion of the window hole. When the engagement between the operating shaft and the engaging portion is released, the refill is retracted by the elastic force of the return spring, and the pen body is immersed in the shaft cylinder.

[0007]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 shows the appearance of a knock-type two-core writing instrument of the present invention. A window cylinder 11 is formed in a shaft cylinder 10 formed of a synthetic resin. The position of the window hole 11 is a portion to which a fingertip contacts at the time of writing. A pair of locking portions 12 are formed on both sides of the front end of the window hole 11. A small step 13 is formed inside the barrel 11 as shown in FIG. At the tip of the barrel 10,
A front end 20 having a front end opening 21 is screwed, and a tail plug 30 integrated with a clip 31 is fitted to the tail end of the barrel 10. In addition, the tip 20 may be formed integrally with the barrel 10, and in the present specification, “the tip opening of the barrel that the pen body portion protrudes” means the tip opening 21 of the tip 20. .

As shown in FIG. 3, two ball-point pen refills 4A and 4B each having a pen body 41 at the tip and filled with oily black ink and red ink are accommodated in the barrel 10 as shown in FIG. ing. Refill 4A, 4B
Is made of a synthetic resin pipe and is bendable. The refills 4A and 4B are connected to the return spring 70.
It is repelled by the tail end.

The pushers 5A and 5B, which are arranged to be able to move back and forth in the shaft cylinder 10, each have a semicircular cross section, and as shown in FIG. 5, a refill housing hole 51 and a semicircular actuator insertion. The part 52 is formed in the axial direction. The pair of pressers 5A and 5B are accommodated in the barrel 10 with their flat portions aligned, and as a result, the actuator insertion portion 52
Has a circular cross section.

[0010] The refills 4A and 4B are inserted into the refill accommodation holes 51 of the pair of pressing elements 5A and 5B, respectively. As shown in FIG. 2, the refills 4A, 4A
B is in contact with the top surface 53 of the pressing elements 5A and 5B, and when the pressing elements 5A and 5B move forward, the refill 4
A and 4B move forward. Further, since the refills 4A and 4B are repelled toward the tail end by the return spring 70, when the pen body portion 41 is immersed in the barrel 10, the pressing members 5A and 5B also move backward to move their tails. The edge is in contact with the step 13 inside the barrel 10.

The armature 60 is a cylindrical body, and is rotatably inserted into the armature insertion portion 52. And the actuator 6
0 is integrally formed with a radial operating shaft 61.
The operating shaft 61 is located on the tail end side of the top surfaces 53 of the pressers 5A and 5B, and protrudes from the window hole 11 of the shaft cylinder 10. When the pen body 41 is immersed in the barrel 10, the tail edges of the pressers 5A and 5B are in contact with the step 13 inside the barrel 10, so that the tails of the pressers 5A and 5B are closed. The edge does not press the operating shaft 61 against the tail edge of the window hole 11. Therefore, the operation shaft 61 can freely rotate left and right around the operator 60 inserted through the operator insertion portion 52.

For example, when writing with the pen body 41 of the refill 4B, the operating shaft 6 is moved from the state shown in FIG.
1 is turned to the left, and as shown in FIG. 7, the operating shaft 61 faces the top surface 53 of the presser 5B. Then, when the operating shaft 61 is advanced with a fingertip, the pen body portion 41 of the refill 4B projects from the front end opening 21 of the front opening 20 as shown in FIG. When the operating shaft 61 is further rotated slightly, the operating shaft 61 is engaged with the locking portion 12 of the barrel 10 and is locked, so that writing can be performed with the pen body portion 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, it is possible to rotate the operating shaft 61 in the opposite direction while slightly advancing the operating shaft 61 with a fingertip. The engagement between the operating shaft 61 and the locking portion 12 is released, and the refill 4B, the pressing element 5B, and the operating element 60 are retracted by the elastic force of the return spring 70, and the pen body 41 of the refill 4B is Immerse yourself in 10. Subsequently, the operating shaft 61 is rotated rightward from the state shown in FIG. 7 to face the top surface 53 of the presser 5A. When the operator 61 is moved forward with a fingertip, the refill 4A
Pen body part 41 protrudes from the front end opening 21 of the front end 20,
When the operating shaft 61 is engaged with the locking portion 12 of the barrel 10, writing can be performed with the pen body 41 of the refill 4A.

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 operating shaft 61 protruding from the window hole 11 is also located at the portion where the fingertip comes into contact during writing. 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.

[0015]

As described above, in the knock-type double-core writing instrument of the present invention, a window hole is formed in a portion where a fingertip abuts during writing, and a pair of locking portions are provided at both ends of the window hole. The formed barrel, two refills accommodated in the barrel in a state of being repelled toward the tail end by a return spring, and a semicircular actuator insertion portion are formed in the axial direction, and the refill is formed. Each having a pair of pressers which are respectively inserted and capable of pressing the refill forward, and a radial operating shaft protruding from a window hole of the barrel, and an actuator rotatably inserted into the actuator insertion portion. The operating shaft protruding from the window hole of the barrel is rotated in either the left or right direction to contact the top surface of one of the pressing elements,
By moving the operating shaft forward and engaging with the locking portion of the window hole, one of the refills advances together with the pressing element, and the pen body portion of the refill projects from the tip end opening of the shaft cylinder to enable writing. When the engagement of the locking part is released, the refill retreats due to the elastic force of the return spring and the pen body part is immersed in the shaft cylinder, so during writing with one pen body part of the refill When switching to the other pen body part, there is no need to interrupt writing and hold the barrel again, and a knock-type two-core writing tool that can be immediately written with the other pen body part can be provided.

[Brief description of the drawings]

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

FIG. 2 is a sectional view of an embodiment of the present invention.

FIG. 3 is a cross-sectional view in which the phase is different from that of FIG. 2 by 90 °.

FIG. 4 is a cross-sectional view of a state where a pen body portion is projected.

FIG. 5 is a sectional view of a pressing element.

FIG. 6 is a sectional view taken along line AA of FIG.

FIG. 7 is a sectional view taken along line BB in FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 shaft cylinder 11 window hole 12 locking portion 13 stepped portion 20 leading end 21 tip opening 30 tail plug 31 clip 4A, 4B refill 41 pen body portion 42 enlarged portion 5A, 5B presser 51 refill accommodation hole 52 actuator insertion portion 53 Top surface of presser 60 Actuator 61 Actuator shaft 70 Return spring

Claims (1)

[Claims] A window is formed at a portion where a fingertip abuts during writing, and a pair of locking portions are formed at both ends of the window. A pair of two refills housed in the barrel in the emitted state and a semicircular actuator insertion portion are formed in the axial direction, and the refills are respectively inserted to press the refills forward. It has a pressing member and an operating shaft in the radial direction protruding from the window hole, and is constituted by an operating member rotatably inserted into the operating member insertion portion. By turning in either direction to abut on the top surface of one of the pushers, and by advancing the operating shaft to engage with the locking portion of the window hole, one of the refills together with the pusher The pen body portion of the refill protrudes from the opening at the tip of the barrel, allowing writing. When disengaging the drive shafts and the engaging portion, knock-type two-core writing instrument pen body retracts the refill by the elastic force of the return spring is characterized by retracted into the barrel.