JPH072234Y2 - Multi-core writing instrument including a mechanical pencil - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is a writing system that accommodates a plurality of cursive bodies including a mechanical pencil body in which the unit itself reciprocates for a predetermined stroke in the axial direction to extend a lead core. The present invention relates to an improvement of a multi-core writing instrument including a mechanical pencil body in which a body accommodating case is mounted in a barrel and the lead core of the mechanical pencil body is pushed out by pressing the writing body accommodating case in the axial direction.

“Problems to be solved by the prior art and the present proposal” Conventionally, the unit itself has a predetermined stroke in the axial direction,
2. Description of the Related Art A multi-core writing instrument in which a plurality of writing bodies including a mechanical pencil body for reciprocating to feed a lead core are housed in a single barrel is widely known.

The present invention accommodates a plurality of cursive bodies including this type of mechanical pencil body in a cursive body storage case, and the cursive bodies contact each other to form a locking protrusion provided in the cursive body storage case. The present invention relates to a multi-core writing instrument that is configured to engage and disengage from a barrel, and each of a plurality of writing instruments including a mechanical pencil body has a knob portion exposed to the outside of the writing instrument housing case to obtain a writing state. A multi-core equipped with a well-known retracting mechanism that slides the grip portion of the desired writing body to engage with the locking projection portion and separates another writing body in the writing state from the locking projection portion. It concerns writing instruments.

However, in the case of this type of mechanical pencil body, the effect cannot be obtained only by equipping the writing body housing case with the above retractable mechanism, and the lead core feeding mechanism of the mechanical pencil body is added. Will be required.

There are also various means for the mechanism for feeding out the mechanical pencil body, but in the present invention, the writing body accommodating case itself for accommodating a plurality of cursive bodies including the mechanical pencil body is pressed in the axial direction of the barrel to lead core. In regard to the one that realizes the feeding of the writing body, and the one that realizes the lead core feeding of the mechanical pencil body by pressing this writing body housing case, it is necessary to replace the writing body and repair the retracting mechanism. Considerable consideration has to be given to the structure for connecting the cursive body storage case and the barrel, which causes problems such as an increase in the number of parts and a complicated structure.

“Technical Means for Solving Problems” The present invention has been made in view of the state of the art described above, and a rear end of a barrel is provided in a writing body storage case that stores a plurality of writing bodies including a mechanical pencil body. And a guide groove that opens at the rear end opening of the shaft cylinder and a vertical groove of a predetermined length that communicates with the guide groove. A guide protrusion that engages with the locking portion provided in the vertical groove is attached to the insertion portion of the storage case, and the writing body storage case is inserted so that the insertion portion of the writing body storage case is exposed for a predetermined length from the rear end opening of the barrel. The case is biased toward the opening of the rear end of the barrel to be mounted in the barrel, which is a means for solving the problem.

[Operation] According to the present invention, the writing body housing case that houses a plurality of writing bodies including the mechanical pencil body is provided with an insertion portion into the rear end portion of the shaft cylinder, and the guide protrusion is attached to this insertion portion. However, since the guide projection is guided by the guide groove that opens at the rear end opening of the shaft cylinder and engages with the engaging portion of the vertical groove of a predetermined length that communicates with the guide groove, the cursive body Thus, the detachable connecting structure between the housing case and the barrel can be easily obtained. Further, since the cursive body storage case is always elastically bulged toward the rear end opening of the barrel to maintain this connection state, the lead-out of the lead of the mechanical pencil body does not resist the elastic force of the cursive body storage case. Then, it is realized by pressing in the axial direction of the barrel.

That is, since the guide protrusion attached to the insertion portion of the writing body storage case moves in the vertical groove of the predetermined length provided in the shaft cylinder, the reciprocating movement of the writing body storage case in the axial direction is guaranteed.
The lead of the mechanical pencil body can be smoothly fed out.

[Examples] Examples of the present invention will be described below with reference to the drawings.

On the side wall of the writing body accommodating case 1, slits 1b reaching the ceiling wall 1a are formed by the number of the writing bodies 3 to be accommodated. Further, a writing body engaging / disengaging protrusion 1c having a predetermined length is provided at the center of the writing body accommodating case 1, and the notch 5 provided in the sliding portion 4 of each writing body 3 is disengaged.

The sliding part 4 of the cursive body has a knob part 6 exposed from the slit 1b of the housing case 1, and the sliding part 4 has an upper projection 7 and a lower part which face each other at equidistant positions. Protrusions 8 are provided.

Each cursive body 3 is placed in the slit 1b of the cursive body housing case 4,
Due to the elastic force of the coil spring 9, the heads of the respective sliding portions 4 are housed in contact with the ceiling wall 1a.

The cursive body housing case 1 is provided with an insertion portion 1d to be inserted into the rear end portion 2'of the barrel, and the insertion portion 1d also has a guide protrusion 10a.
The guide protrusion 10 is engaged with the engaging portion 12a of the vertical groove 12 through the guide groove 11 formed in the shaft cylinder 2 to attach and detach the writing body accommodating case 1 and the shaft cylinder 2. It realizes a possible connection structure. A guide groove 11 that opens at the shaft cylinder rear end opening 2b is bored in the rear end 2'of the shaft cylinder, and a vertical groove 12 communicating with the guide groove 11 is provided over a predetermined length. As mentioned above.

As described above, the vertical groove 12 is formed with the locking portion 12a.

The writing body accommodating case 1 mounted in the shaft cylinder 2 through the rear end opening 2b of the shaft cylinder is always elastically urged by the coil spring 13 toward the rear end opening 2b of the shaft cylinder. The guide protrusion 10 attached to the portion 1d engages with the locking portion 12a of the vertical groove 12 through the guide groove 11 to form the shaft tube 2
Removal to the outside is prevented.

In the figure, 14 is a spencer provided with a through hole 14a for ensuring stable movement of each writing body 3 in the barrel 2, and is formed integrally with the writing body housing case 1.

Further, FIG. (5) is a schematic view of a known mechanical pencil body 3a used in the present invention, in which a lead core accommodating tube b is loosely fitted in an outer cylinder a via a coil spring c. When the lead core accommodating tube b is pressed, the mechanical pencil body 3a moves in the direction of the front end opening 2a of the shaft cylinder, and the tip step a'of the outer cylinder a comes into contact with the front end opening 2a of the shaft cylinder. Let

At this time, when the lead core containing tube b is further pressed against the elastic force of the coil spring c, the chuck part d provided at the front end of the lead core containing tube b is opened, and the lead core L is fed forward. When the pressing force is released, the chuck part d closes and holds the lead core L.
Thus, by repeatedly applying and releasing the pressing force to the lead core accommodating tube b, the lead core L is fed out over a predetermined length.

Now, in order to obtain the writing state of the mechanical pencil body 3a from the state of FIG. (2), the sliding portion 4a of the mechanical pencil body 3a can be obtained.
The writing state is realized by pressing the knob portion 6a provided in the direction toward the front end opening portion 2a of the shaft cylinder and engaging the notch portion 5a of the sliding portion 4a with the writing body engaging / disengaging projection portion 1c (( 3) See figure).

When it is necessary to feed the lead core L, the lead core L having a predetermined length is fed out by repeatedly applying and releasing the pressing force to the writing body accommodating case b in FIG. (3). . That is, by repeatedly applying and releasing the pressing force to the eraser protection lid 15 provided on the ceiling wall 1a of the writing body accommodating case against the elastic force of the coil spring 13, the lead core L having a predetermined length is extended. Will be realized.

At this time, the amount of movement of the writing material storage case 1 in the direction of the front end opening 2a of the shaft cylinder is determined by the length of the insertion portion 1d of the writing body storage case exposed from the rear end opening 2b of the shaft cylinder. The insertion portion 1d of the cursive body storage case which is provided at the rear end portion 2'of the shaft cylinder
It is needless to say that the length of the vertical groove 12 with which the guide protrusion 10 attached to the above is engaged is set to a length corresponding to the movement amount of the writing body accommodating case 1.

In order to realize the writing state of the other writing body 3b, in FIG. (3), the grip portion 6b of the other writing body 3b may be moved in the direction of the front end opening 2a of the shaft cylinder. The lower protrusion 8b of the sliding portion 4b of the other cursive body abuts against the upper protrusion 7a of the sliding portion 4a of the mechanical pencil body 3a and kicks it to remove the cutout portion 5a of the sliding portion 4a of the mechanical pencil body. It is detached from the engaging / disengaging protrusion 1c, and the notch 5b of the sliding portion 4b of another cursive body.
Is engaged with the engaging / disengaging protrusion 1c. As a result, the mechanical pencil body 3a is restored by the elastic force of the coil spring 9, and the writing state of the other writing body 3b is realized.

[Effect] As described above, the present invention has a writing body retracting mechanism built-in, and a writing body accommodating case mounted via a coil spring in the barrel to form an insertion portion into the barrel cylinder rear end. The guide protrusion is attached to the insertion portion, and the guide groove of the guide sleeve of the cursive body storage case is engaged with the guide groove that opens at the rear end opening of the shaft cylinder at the rear end of the shaft cylinder. Since the vertical groove having the stopper is provided, the guide projection of the writing body storage case can be attached to and detached from the vertical groove via the guide groove of the shaft cylinder when attaching and detaching the writing body storage case to the barrel. The guide projection of the writing body storage case moves in the vertical groove when the lead core of the mechanical pencil body is extended, so pressing force is applied to and released from the writing body storage case. By doing so, you will be able to do it more easily.

[Brief description of drawings]

FIG. 1 is a partially sectional front view for explaining the whole of a writing instrument implementing the present invention, FIG. 2 is a longitudinal sectional view of FIG. 1, and FIG. 3 is an explanatory view of a writing state of a mechanical pencil body in FIG. Fourth
The drawing is a right side view of a partial cross section in FIG. 1, and FIG. 5 is a schematic explanatory view of a mechanical pencil body used in the present invention. 1 ... cursive case, 2 ... barrel, 3 ... cursive,
3a ... Mechanical pencil body, 4 ... Sliding part, 5 ... Notch part, 6 ... Pick part, 7 ... Upper protrusion, 8 ... Lower protrusion,
9,13 ... Coil spring, 10 ... Guide protrusion, 11 ... Guide groove, 12 ... Vertical groove, 12a ... Locking part.

Claims (1)

[Scope of utility model registration request] 1. A cursive body accommodating case that accommodates a plurality of cursive bodies including a mechanical pencil body and is equipped with a mechanism for engaging and disengaging with each cursive body is provided in the barrel. In a multi-core writing instrument configured to push out a lead core of a mechanical pencil body by pressing in the axial direction, the writing body accommodating case 1 is provided with an insertion portion 1d into a rear end portion 2'of a shaft cylinder, and The shaft rear end opening 2b is provided on the rear end 2'of the cylinder.
And a vertical groove 12 of a predetermined length communicating with the guide groove 11 is formed, and the insertion portion of the writing body storage case is formed.
The guide protrusion 10 that engages with the locking portion 12a provided in the vertical groove 12 is attached to 1d, and the writing body is inserted so that the insertion portion 1d of the writing body housing case is exposed from the rear end opening 2b of the barrel for a predetermined length. A multi-core writing instrument including a mechanical pencil body, characterized in that the housing case (1) is biased toward the rear end opening portion (2b) of the barrel and mounted in the barrel (2).