JP2557187Y2 - Multi-core writing instrument of mechanical pencil and ballpoint pen - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-core writing instrument in which a mechanical pencil and a ball-point pen are housed in a barrel.

[0002]

2. Description of the Related Art Recently, multi-color ballpoint pen ink has been developed, and a plurality of ballpoint pen cores having different ink colors are arranged concentrically in a barrel, and the pen body of the ballpoint pen is opened at the tip end of the barrel. A multi-core writing instrument of a ball-point pen that is selectively protruded from a pen has been put to practical use. In such a multi-core writing instrument, a color-coded actuator is connected to the tail end of the ballpoint pen core, and a pressing portion of the actuator protrudes radially from a window hole of the barrel. Then, when the pressing portion of the actuator of the color to be written is advanced in the axial direction with the fingertip, the ballpoint pen core advances and the pen body protrudes from the tip opening of the barrel, but at this time, the pressing portion of the operator is the fingertip. Since it is also pushed in the radial direction, the ballpoint pen core is slightly displaced toward the axis of the barrel, and the pressing part of the actuator almost enters the barrel and engages with the locking part formed in the barrel. , To receive pen pressure.

On the back surface of the actuator, two protrusions for retraction drive and retraction drive are formed up and down, and the lower retraction drive is in the forward position in the process of the operator moving forward. The ball-point pen hits the retractable driving projection of the actuator of the ball-point pen core, and pushes this core from the vicinity of the axis of the barrel to the periphery. Accordingly, the engagement between the actuator of the other ballpoint pen core at the forward position and the locking portion of the barrel is released, and the ballpoint pen is retracted.

It is preferable that the multi-filament writing implement also accommodates a mechanical pencil and implements the multi-filament writing implement of a mechanical pencil and a ball-point pen. That is, the operator for the mechanical pencil is connected to the core case of the mechanical pencil tool, and when this operator is advanced, the front end of the mechanical pencil tool projects from the tip of the barrel.

In a conventional multi-core writing instrument of a mechanical pencil and a ballpoint pen, when writing with a mechanical pencil,
In order to extend the pencil lead from the front end of the mechanical pencil refill, it is necessary to further advance the mechanical pencil operating element, which is in the advanced position and engaged with the locking portion, to perform a knocking operation. However, the actuator in the forward position
The projecting distance of the pressing portion from the window hole of the shaft cylinder is small,
In addition, since it protrudes radially from the peripheral surface of the shaft cylinder, there is a problem that it is extremely difficult to perform a knocking operation during writing.

For this reason, the knocking cylinder is accommodated in the shaft cylinder so as to be able to move back and forth, and the knocking portion of the knocking cylinder protruding from the tail end opening of the shaft cylinder is pressed to perform the knocking operation, thereby extending the pencil lead. Can be considered.

[0007]

In the multi-core writing instrument of the mechanical pencil and the ball-point pen, since the core of the mechanical pen and the mechanical element of the mechanical pencil are repelled toward the tail end by a return spring, the knock cylinder has some stopper mechanism. It is necessary to prevent falling off from the tail end opening of the barrel. For this reason, for example, while forming an inward flange at the tail end opening of the barrel, and forming a step on the knock barrel, and making this step abut against the inward flange of the barrel, the knock barrel becomes It does not fall out of the tail end opening of the barrel.

On the other hand, in such a multi-core writing instrument of a mechanical pencil and a ballpoint pen, a cylinder having a round hole through which these are inserted is required in order to guide the core of the mechanical pen and the middle tool of the mechanical pencil. However, if an inward flange is formed at the tail end opening of the barrel, it is impossible in terms of mold design to integrally form the cylinder in the barrel and perform injection molding. For this reason, the cylinder becomes a separate part, the number of parts increases, and there is a problem that the assembling work also requires labor.

Therefore, the present invention provides a multi-core writing instrument of a mechanical pencil and a ball-point pen, in which the knocking operation of extending the pencil lead from the front end of the mechanical pencil is extremely easy, and the number of parts is small and the assembly is easy. It is intended to do so.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a ball-point pen having a ballpoint pen actuator connected to the tail end of an ink container and a mechanical pencil actuator having a tail end of a lead case. When the mechanical pencil tool connected to the shaft cylinder is housed in the barrel, and presses the pressing portion of the ball-point pen or the mechanical pencil penetrating radially from the window hole of the barrel to advance in the axial direction. The ballpoint pen core or mechanical pencil tool is advanced and the actuator engages with the locking portion, and the pen body of the ballpoint pen or mechanical pencil tool protrudes from the tip opening of the barrel and is in the advanced position. In a multi-core writing instrument of a mechanical pencil and a ball-point pen for retracting another ball-point pen core or mechanical pencil, a knocking portion is provided at a tail end, and a ball-point pen actuator and Knock sleeve having a locking portion therein with the window hole and the stopper projection Yapupenshiru for operating element is inserted is formed on the peripheral surface, the knock part, the inner
Guide the ballpoint pen core and mechanical pencil
Cylinder is formed integrally and the tail end is straight
A protrudes from the tail end opening of the barrel, and a stopper protrusion Bruno
Tsu by utilizing elastic deformation of click cylinder accommodated in the barrel of the window opening in the fitting write Nde before <br/> Kodo capable within the barrel, forward previous port in pencil tool from the tip opening of the barrel When the knocking operation is performed by pressing the knocking portion when the knocking portion is protruded in an impossible state, the locking portion of the knocking tube presses the mechanical pencil operating element so that the pencil lead is extended.

[0011]

The knock cylinder having the engaging portion with which the actuator is engaged is housed in the shaft cylinder so as to be able to move back and forth, and the knock part of the knock cylinder is projected from the tail end opening of the shaft cylinder. When the knocking operation is performed by pressing the knocking portion when the front end of the inner tool projects from the distal end opening of the barrel in a state where it cannot advance, the pencil lead is extended. Further, since the stopper projection of the knock cylinder is fitted into the window hole of the barrel, a stopper mechanism is formed by the stopper projection and the window hole of the barrel, and the knock cylinder does not fall out from the tail end opening of the barrel. Therefore, it is not necessary to form an inward flange portion at the tail end opening of the barrel, and the barrel can be formed in a straight shape, so that the cylinder can be injection-molded integrally in the barrel, and the number of parts is small and assembly is possible. It will be easier.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the embodiments shown in the drawings. In FIG. 1, a barrel 10 comprises a rear shaft 1 and a front shaft 2 which are injection-molded with synthetic resin, and the rear shaft 1 and the front shaft 2 are detachably connected. And the barrel 10
A ball-point pen core 7 filled with oil-based ink and a mechanical pencil 8 are accommodated therein. The rear shaft 1 has a straight shape in which an inward flange is not formed at the tail end opening, and two vertically long window holes 11 are formed on the peripheral surface so as to face each other. A cylinder portion 12 having a plurality of round holes is integrally formed. Then, the ballpoint pen core 7 and the mechanical pencil tool 8 are attached to the cylinder 1
Each of them is inserted into the second round hole and guided. Note that three or more window holes 11 may be formed to accommodate two or three ballpoint pen cores.

A knock cylinder 6 is disposed in the rear shaft 1 so as to be able to move back and forth. As shown in FIGS. 3 and 4, the knock cylinder 6 is provided with two vertically long window holes 61 facing each other. The window hole 61 is the same size as the window hole 11 of the rear shaft 1 and faces the window hole 11, but may be larger than the window hole 11. Then, a stopper projection is attached to the end of the window hole 11.
The stopper projection 65 is fitted into the window hole 11 of the rear shaft 1. Stopper protrusion 65
Is a small one with a triangular cross section with an inclined front.
When the knock cylinder 6 is inserted from the tail end opening of the rear shaft 1,
In the process, the knock cylinder 6 is elastically deformed to reduce the diameter,
-When the projection 65 reaches the window hole 11, the knock cylinder 6 is restored.
Into the window hole 11. A vertical rib 62 is formed inside the knock cylinder 6, and a leading edge of the vertical rib 62 is a locking portion 63. And the tail end of the knock cylinder 6 is the knock part
64, which protrudes from the rear end opening of the rear shaft 1.

The ball-point pen core 7 has a pen body 71 having a ball at the tip of an ink container 72 filled with oil-based ink.
Is attached. On the other hand, as shown in FIG. 5, the mechanical pencil 8 is of a normal knock-out type. In brief, the lead case 87 is connected to the chuck joint 86 and the chuck 83, and the front end 81
And the fixing screw 84 are connected. A knock spring 85 is interposed between the fixing screw 84 and the chuck joint 86. When the chuck 83 retreats due to the resiliency of the knock spring 85, the chuck 83 moves to the chuck ring 8.
It is tightened by 2 to bite the pencil lead 88.

At the tail end of the ink storage tube 72 of the ball-point pen core 7, a small-diameter part of the tip of the ball-point pen actuator 4 is inserted and connected. The distal end small diameter portion of the actuator 5 is connected. A pressing portion 41 and a pressing portion 51 are respectively provided on the outer surfaces of the operating members 4 and 5 so as to protrude.
The 41 and the pressing portion 51 protrude from the window hole 11 of the rear shaft 1 through the window hole 61 of the knock cylinder 6. Actuator 4 and Actuator 5
On the inner surface, retraction driving projections 43 and 53 and retraction driven projections 42 and 52 are formed vertically. And
The operating element 4 and the operating element 5 are repelled rearward by a return spring 9, and when not in use, a mechanical pencil tool 8.
Both the tip 81 and the pen body 71 of the ballpoint pen core 7 are immersed in the tip shaft 2. At this time, the knock cylinder 6 is also repelled rearward, and the stopper projection 65 is in contact with the tail edge of the window hole 11. In other words, the stopper projection 65 and the tail end of the window hole 11 constitute a stopper mechanism for the knock cylinder 6, so that the knock cylinder 6 does not fall out from the tail end opening of the rear shaft 1.

When writing with a ball-point pen, the pressing portion 41 of the ball-point pen actuator 4 is pressed with a fingertip to advance in the axial direction. At this time, since the pressing portion 41 is pressed in the radial direction by the fingertip, the ballpoint pen core 7 is
, The pressing portion 41 enters the rear shaft 1, the projection 42 for backward drive is located at the center of the rear shaft 1, and the top surface of the actuator 4 is the engaging portion of the knock cylinder 6. Engage with 63 to receive pen pressure. At the same time, ballpoint pen core 7
Pen body 71 protrudes from the front end opening 21 of the front shaft 2 to enable writing.

Next, when writing with a mechanical pencil, the pressing portion 51 of the mechanical operator for mechanical pencil 5 is pressed with a fingertip to advance in the axial direction. Also in this case, the mechanical pencil tool 8 is slightly displaced toward the center of the barrel 10 and the retracting drive projection 53 of the actuator 5 is retracted by the ball-point pen actuator 4 located at the center of the rear shaft 1. Push against the drive projection 42 and push it outward. Accordingly, the engagement between the top surface of the actuator 4 and the engaging portion 63 is released, the ball-point pen core 7 retreats, and the pen body 71 enters through the front end opening 21 of the front shaft 2.
The leading end 81 protrudes from the leading end opening 21 instead. At this time, the top surface of the actuator 5 engages with the engagement portion 63 of the knock cylinder 6 to receive the pen pressure. However, as shown in FIG. Abut with step 21a
81 is unable to move forward.

When the pencil lead 88 is extended, the knock portion 64 protruding from the tail end opening of the rear shaft 1 may be knocked and advanced. Since the top surface of the actuator 5 is engaged with the engaging portion 63 of the knock cylinder 6, the knocking operation causes the lead case 8 to move.
7 moves forward. Therefore, the chuck 83 moves forward in the front port 81 where it cannot advance, and the pencil lead 88 is extended from the front port 81.
Further, as the chuck 83 advances, the chuck ring 82 moves forward.
Is released and the pencil lead 88 is opened. Then, when the knock of the knock cylinder 6 is released, the chuck 83 retreats and is fastened by the chuck ring 82, and again holds the pencil lead 88.

[0019]

As described above, the multi-core writing instrument of the present invention, a mechanical pencil and a ballpoint pen, accommodates a knock cylinder having a locking portion with which a mechanical actuator for a mechanical pencil engages in a shaft cylinder so as to be able to move back and forth. Since the knocking part of the knocking cylinder protrudes from the tail end opening of the barrel, the knocking part is pressed when the leading end of the mechanical pencil tool protrudes from the tip opening of the barrel so that it cannot advance. When the operation is performed, the pencil lead is extended. Therefore, the knocking operation of extending the pencil lead from the front end of the mechanical pencil becomes very easy. Further, since the stopper projection of the knock cylinder is fitted into the window hole of the barrel, a stopper mechanism is formed by the stopper projection and the window hole of the barrel, and the knock cylinder does not fall out from the tail end opening of the barrel. Therefore, since there is no need to form an inward flange at the tail end opening of the barrel, the barrel can be formed into a straight shape, so that the cylinder part that guides the ballpoint pen core and mechanical pencil tool is integrally molded into the barrel. And a multi-core writing instrument of a mechanical pencil and a ballpoint pen with a small number of parts and easy assembly.

[Brief description of the drawings]

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

FIG. 2 is an operation explanatory diagram.

FIG. 3 is a sectional view of a knock cylinder.

FIG. 4 is a cross-sectional view taken along line AA of FIG.

FIG. 5 is a cross-sectional view of a mechanical pencil tool.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Shaft cylinder 1 Rear shaft 11 Window hole 12 Cylinder part 2 Front shaft 21 Tip opening 4 Actuator for ballpoint pen 41 Pressing part 5 Actuator for mechanical pencil 51 Pressing part 6 Knock cylinder 61 Window hole 63 Locking part 64 Knock part 65 Stopper Projection 7 Ball-point pen core 71 Pen body 8 Mechanical pencil tool 81 Tip opening 88 Pencil core 9 Return spring

Claims (1)

(57) [Scope of request for utility model registration] 1. A mechanical pen, in which a ballpoint pen actuator is connected to the tail end of an ink storage tube and a mechanical pencil tool in which a mechanical pencil actuator is connected to the tail end of a lead case, are housed in a shaft cylinder. When the pressing portion of the ball-point pen actuator or mechanical pencil actuator that protrudes in the radial direction from the window hole of the barrel is pushed forward and moved in the axial direction, the ball-point pen core or mechanical pencil tool advances and the actuator is engaged. A mechanical pencil and a ball-point pen which engage with the stop portion and which retreats the other ball-point core or mechanical pencil in the forward position while the tip of the pen body of the ball-point pen or the mechanical pen tool protrudes from the tip opening of the barrel. The multi-filament writing instrument of the present invention has a knocking portion at the tail end, and a window hole and a stop through which an actuator for a ball-point pen and an actuator for a mechanical pencil are inserted. Knock sleeve having a locking portion therein with over protrusions are formed on the peripheral surface, the knock part, ball-point pen core contact therein
And a cylinder to guide the pencil
It is formed on the body, the tail end protrudes from the tail end opening of the straight barrel, and the stopper projection is used to reduce the elastic deformation of the knock barrel.
Housed in the front-rear movement available to the barrel Nde write fitted into the window hole of the barrel by utilizing, the knock part when the previous port in pencil device is projected in a state of non forward from the distal end opening of the barrel A multi-core writing instrument of a mechanical pencil and a ball-point pen, wherein when a knocking operation is performed by pressing, the locking portion presses an operator for a mechanical pencil and a pencil lead is extended.