JP3183485B2 - Double writing instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-type writing instrument, and more particularly, to a pen-type body in which a plurality of writing instruments such as a mechanical pencil and a ball-point pen are stored, and an arbitrary writing element is selected by a writing element selecting means such as a pendulum. TECHNICAL FIELD The present invention relates to a knock-type double-type writing instrument in which a writing element tip protrudes from a cylindrical tip.

[0002]

2. Description of the Related Art Japanese Patent Application Laid-Open No. 55-47362 discloses a double-type writing instrument in which a plurality of writing objects are housed in a cylinder (same as a shaft cylinder) so that an arbitrary writing object can be selected and written. There are proposed known ones.

As shown in the rear part of FIG. 6, the double writing instrument described in this publication has a hollow outer cylinder 1 at the outer wall of the double writing instrument. In this compound writing instrument, the direction in which the writing body projects along the axial direction of the outer cylinder 1 is defined as a front direction, and the opposite direction is defined as a rear direction. Further, the outer cylinder 1 has a substantially cylindrical shape as a whole, and a rear end portion thereof is formed to be slightly tapered.

As shown in FIG. 6, a first window 2 communicating from the inside of the cylinder 1 to the outside is formed in a part of the outer peripheral surface at the rear end of the outer cylinder 1. A clip 3 that covers the window 2 from the outside and extends forward is fixed. The front end of the clip 3 expands in an arc shape toward the center of the shaft and contacts the outer cylinder 1. The clip 3 is provided with a second window 4 at a position where the clip 3 is fixed to the cylindrical body 1 in a direction perpendicular to the axial direction, and inside the window 4 along the axial direction. An elongated push button 5 is arranged so as to be able to come and go. The push button 5 has a protrusion 5 at the rear end.
a is formed, the projection 5a is located between the clip 3 and the outer cylinder 1 and abuts against the outer wall of the outer cylinder 1, and the front end of the cylinder 1 extends forward to form the pressing portion 5b. Is done. When the push button 5 is pushed in the state of protruding from the second window portion 4 and immersed in the clip 3, the push button 5 swings around the projection 5a as a fulcrum and the pushing pressure is reduced. The part 5b faces the first window part 2.

The outer cylinder 1 has a top hole 6 opening rearward in the axial direction, and a knock bar 7 is formed through the top hole 6.
Is provided to protrude from the inside of the outer cylinder 1 to the outside. A slider 8 is provided in the outer cylinder 1 in front of the knock rod 7 to move in the axial direction in the outer cylinder 1 by operating the knock rod 7. The slider 8 has a substantially cylindrical shape, and a substantially cylindrical projecting pin 9 urged by a first spring 9a toward a side where the clip 3 is located in a plane including a shaft. Buried in Further, on both sides of the peripheral surface of the slider 8 which intersects the flat surface, a convex portion 8a extending with the same width in the axial direction is formed. Further, at the rear end of the slider 8, a column-shaped eraser 7a fixed to the knock bar 7 is fixed with a cylindrical eraser stopper 7b.

A rod-shaped pendulum 10 extending forward is located in front of the slider 8, and the rear end 10 a of the pendulum 10 has a large diameter. Because it is connected to the front end of 8,
The pendulum 10 is swingable inside the outer cylinder 1 around the rear end.

A guide member fixed to the outer cylinder 1 has a plurality of sliding grooves 12a in front of the slider 8 for accommodating a plurality of writing bodies (not shown) so as to be able to advance and retreat in the axial direction. 12 are provided. A spring (not shown) for urging the writing body backward is attached to the writing body stored in each sliding groove 12a of the guide member 12.

A second spring 13 is disposed between the guide member 12 and the slider 8 for surrounding the pendulum 10 and for urging the slider 10 rearward. A slit member 14 is provided on the inside 1 a of the outer cylinder 1 behind the rear end of the guide member 12. The slit member 14 has a substantially cylindrical shape, and a portion intersecting the plane is a slit 14a.
The protrusion 8a of the slider 8 is slidably fitted in 4a.

[0009] When using the double-type writing instrument, the double-type writing instrument is tilted with the side of the writing object to be selected facing downward. Thereby, the tip of the pendulum 10 faces the rear end of the sliding groove 12a in which the writing implement to be selected is hung down. If the knock bar 7 is pushed in this state, the pendulum 10 moves forward via the slider 8 and the tip of the pendulum 10 is
In order to abut on the rear end of the cursive body selected and advance it, the front end of the cursive body protrudes from the front end of the outer cylinder 1. At this time, the protruding pin 9 provided on the slider 8 advances while pressing the inner surface of the outer cylinder 1, and if located on the first window 2, projects through the window 2 to the outside of the outer cylinder 1. Then, the pressing portion 5b of the push button 5 is pressed toward the outside of the outer cylinder 1 so that the push button 5 projects from the second window portion 4. When the pushing of the knock bar 7 is stopped, the slider 8 is urged rearward by the second spring 13 so that the side surface of the projecting pin 9 comes into contact with the inner periphery of the first window 2. Slider 8
Prohibits backward movement of Eventually, the selected writing instrument is maintained in a state of protruding from the tip of the outer cylinder 1, and the double-type writing instrument enters a writable state.

On the other hand, when the writing instrument is stored in the outer cylinder 1, the push button 5 protruding from the clip 3 is pressed to be immersed in the clip 3. As a result, the protruding pin 9 enters the slider 8 via the pressing portion 5b and is disengaged from the first window 2, so that the slider 8 can be moved. At this time, the slider 8 is
The urging force of 3 moves rearward, so that the pressing force on the rear end of the writing instrument via the pendulum 10 is released, so that the tip of the writing instrument is immersed in the outer cylinder 1 and stored.

[0011]

However, the first problem with the conventional double-type writing instrument is that the knock bar 7
The stroke of the writing instrument protrudes and sinks by strokes in the front-back direction, so that the knock bar 7 protrudes long from the rear end of the double-type writing body, and the appearance is poor, and when knocking, the knock bar 7 is inserted into the outer cylinder 1. The deep immersion makes it difficult to remove the knock bar 7 and to use the eraser 7a. A second problem is that if the cursive character is inadvertently inserted into the breast pocket of the clothes while it is in a protruding state, the clothes may be stained or damaged.

It should be noted that the technology related to the present invention has a
There are those disclosed in Japanese Patent Publication Nos. 19274 and 5-14878. In these technologies, a plurality of cursive objects are housed in a barrel, and the cursive body can be selected and protruded with a pendulum. In addition, an upper barrel and a sheath (equivalent to a cap body) are provided at the rear of the cursive body. Then, the upper end of the lower barrel and the cylindrical body (the end opposite to the protruding side of the writing body) is covered. Further, the protrusion is engaged with a cam shape opened on the outer peripheral surface of the lower shaft cylinder or the like to maintain / release the projected / accommodated state, and
The writing body is protruded by knocking, and the writing body is accommodated by rotating the upper barrel relative to the lower barrel.

Therefore, according to these disclosed techniques, when the writing body is projected, the upper cylinder shaft or the like may be pushed, so that there is no member such as the knock bar that projects from the rear end. However, since the clip is configured to be fixed to the upper cylindrical shaft or the like, if the clip is erroneously inserted into the pocket of the clothes with the script being protruded, the script will remain protruded, The danger of polluting or damaging is not eliminated. In addition, the writing body is protruded by knocking, but in order to store it, the lower barrel must be rotated with respect to the upper barrel, etc., so it is necessary to operate with both hands, and it is easy to operate with one hand It is difficult. That is, there is a problem that operability is inferior.

In Japanese Patent Publication No. 3-61600, one writing body is projected and accommodated in a shaft cylinder by engagement of a cam opening groove with a projection. Since it is necessary to rotate the upper barrel and the like with respect to the lower barrel, there is a problem that operability is poor.

Further, Japanese Utility Model Laid-Open No. 2-8991 proposes a knock-type writing instrument in which an outer cylinder corresponding to a cap body and an inner cylinder accommodating a writing body are engaged with an engaging portion. A clip that extends in the axial direction of the outer cylinder is provided on the tail bottom that is separate from the outer cylinder, the tail bottom is fitted to the rear end of the outer cylinder, and a protruding lock is formed on the outer peripheral surface of the inner cylinder that extends into the outer cylinder. Section is provided. When the tail bottom is pushed and knocked, the front end of the clip and the engaging portion toward the center of the shaft are locked by the locking portion, and the state in which the writing body is projected is maintained. However, in this knock-type writing instrument, a plurality of cursive characters cannot be selected and used. In addition, since the locking portion of the inner cylinder is provided in the outer cylinder and is formed in a protruding shape on the outer peripheral surface of the inner cylinder, the size of the locking portion cannot be increased to a certain extent. Therefore, since the engaging portion and the engaging portion of the clip cannot be locked deeply, the locking is easily released. That is, there is a problem that it is difficult to reliably maintain the projected state of the cursive writing.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and the problem is that there is no portion that protrudes and sinks from the rear end of the double-type writing instrument, so that the appearance is good, and the writing material is good. Provided is a double-type writing instrument that does not automatically retract and damage the clothes even when inserted into clothes while protruding, and that has good operability and that can reliably maintain the protruding state of the writing tools. It is.

[0017]

The present invention has the following arrangement to solve the above-mentioned problems. The present invention includes a plurality of cursive bodies, and a hollow cylindrical body extending from a front end to a rear end of any of the cursive bodies, and a cylindrical body enclosing a rear part of the cylindrical body. A cap body that can move forward and backward along the front and rear direction, and is swingably supported at the rear of the cap body,
A clip body extending forward along the outer peripheral wall of the cap body; and a writing body selection unit configured to cause any of the plurality of writing bodies to protrude from the front end of the cylindrical body by advancing the cap body. And a writing state maintaining section that is a writing body immersion section for maintaining the protruding state of the arbitrary writing body and immersing the protruding writing body, wherein the clip body has a front end portion of the cylinder. A locking portion is provided at the front end portion of the cap body, the locking portion being urged toward the center of the body, and the writable state maintaining portion is provided at a position facing the locking portion in the cap body. A window portion that is bored so that the inside is exposed, and a hole that is bored toward the inside of the cylinder at a position of the cylinder where the locking portion faces when the cap body advances to a position where the arbitrary writing body projects. And a hole formed in the hole. The rear end face is formed in a shape to be locked by the locking portion, and the writing body immersion portion is formed by forming the side surface of the cylindrical body at the front end of the clip body on the slope facing the center of the cylindrical body axis and toward the rear. It is a double-type writing instrument characterized by including.

[0018]

In the present invention, since the cap body has to be advanced to select and protrude an arbitrary writing object because of the above-mentioned structure, a knock bar protruding long from the rear end like a conventional double-type writing instrument. There is no appearance.

Further, the writing state is maintained by the writing state maintaining means. The writing state maintaining means has a configuration in which a locking portion of the clip body is engaged with a hole formed in the cylindrical body . Therefore, when the cap body is moving forward, the locking portion of the clip body in the state maintaining means is deeply immersed into the hole of the cylindrical body through the window of the cap body and engages with the rear end face of the hole. Since the locking portion is stopped, the locking portion is deeply engaged with the hole portion and can be reliably locked. Therefore, it is possible to reliably maintain the locked state of the writing body. In addition, the writing body can be made to protrude by holding the cylindrical body by hand and pressing the cap body with the finger of the hand. Therefore, since the operation can be performed with one hand instead of both hands, operability is good.

Further, since the writing body immersion portion includes a cylindrical side surface at the front end of the clip body formed on a slope facing the center of the cylinder axis and toward the rear, the double-type writing instrument can be used as an arbitrary writing body. Even when the clip is engaged with the outer edge of the pocket by inserting the clip into the pocket with the protruding state, the locking portion of the clip body is separated from the cylindrical body, and thus the locking of the locking portion is released and protruded. The body is automatically immersed. Therefore,
Even if the double writing instrument is inserted into the pocket of the clothes, the clothes can be reliably prevented from being stained.

[0021]

Embodiments of the present invention will be described below in detail with reference to the drawings. This embodiment is a double-type writing instrument as shown in FIG. In FIG. 1 and the following description, the front refers to the side of the writing pen of the compound writing instrument projecting, and the rear refers to the side of the compound writing instrument pressed when the writing pen is projected.

The double-type writing instrument shown in FIG.
0, 21 and the front barrel 2 is hollow from the front end to the rear end of any of the writing bodies 20, 21.
A cap body 24 enclosing the rear portions of the front barrel 22 and the middle barrel 23 and capable of moving back and forth along the front and rear directions of the front barrel 22 and the middle barrel 23; A clip body 25 swingably supported by a rear part of the cap body 24 and extending forward along the outer peripheral wall of the cap body 24; and an arbitrary one of the two writing bodies as the cap body 24 advances. Select the tip barrel cylinder 2
2 A pendulum 26 protruding from the front end, a writing state maintaining mechanism 27 for maintaining the protruding state of the arbitrary writing bodies 20, 21 and a writing body immersion part (clip body) for immersing the protruding writing bodies 20, 21 25 is a composite writing instrument having a pressing portion 25b at the rear end and a front end 25c), wherein the clip body 25 has a front end urged toward the axial center of the middle barrel 23, and A locking portion 28 is provided at the portion. In addition, the writing state maintaining mechanism 27 includes a window portion 29 formed at a portion of the cap body 24 facing the locking portion 28 so as to expose the inside of the cap body 24, and the cap body 24 is Arbitrary cursive 2
0, 21 when it is advanced to the protruding position.
And a hole 30 drilled toward the inside of the center cylinder 23 at a position facing the center cylinder 23, and a rear end face 30 a of the hole 30 is formed in a shape to be engaged with the engagement portion 28. I have. The double writing implement will be described in more detail.

(Top Shaft Tube 22, Middle Shaft Tube 23) Both the front shaft tube 22 and the middle shaft tube 23 are hollow, and the outer periphery thereof forms the outer wall of the main body of the double writing instrument. The tip shaft 22 has a roughly cylindrical shape that tapers gently, has a significantly tapered front end, and has a tip hole A open. At the rear end of the front barrel 22, there is formed a connecting portion 22a having a step and becoming thinner and having a thread groove on the outer periphery, and the thinned connecting portion 22a is formed.
Is slightly expanded in the front end portion of the center cylinder 23 and is screwed and connected to the connection portion 23a having a thread groove on the inner periphery. In the connected state, an annular decorative ring 31 is sandwiched between the stepped portion of the front barrel 22 and the distal end of the middle barrel 23. In the rear part of the center shaft cylinder 23, each of the cursive
A guide tube 32 that slidably accommodates 1 is fitted. The cylindrical body of the present invention may be a single body or may be divided into three or more.

(Center Shaft 23) Here, FIG.
It is a detailed explanatory view of the rear part of a single unit. As shown in FIGS. 1 and 2, the hole 30 is formed on one side of the peripheral side surface of the center cylinder 23 where the clip body 25 is provided, and the inner side extends along the axial direction on the other side. A guide groove 23b is formed halfway to the rear end, and a locking hole 23c penetrating toward the outer peripheral surface is formed at the rear end of the guide groove 23b. The rear end face 30a of the hole 30 is formed in a plane perpendicular to the axis. When the guide tube 32 is fitted into the center shaft tube 23, an engagement end portion 32h, which will be described later, of the guide tube 32 is fitted and slid into the guide groove 23b.
A rear end portion for 2h is formed so as to be fitted and locked in the locking hole 23c. Further, on the inner peripheral surface on the rear side of the location where the hole 30 is formed, a hook for locking the guide tube 32 so as not to go backward beyond a predetermined position when the guide tube 32 is fitted in the center shaft tube 23. A stopping step 23d is formed, and the locking step 23d is formed.
Is formed in a substantially cylindrical shape. A window 23e into which the clip body 25 can be moved back and forth is formed on the side of the hole 30 behind the locking step 23d of the center cylinder 23. On the outer peripheral surface of the rear end portion of the center cylinder 23, three guide ribs 23f projecting outward and extending in the axial direction are formed at, for example, 90-degree intervals except for the window 23e. Or the number of parts), and on the inner peripheral surface of the rear end,
A locking step 23g having a reduced opening diameter is formed.
As will be described later, a joint 36 is slidably fitted into the rear end portion, and the locking step 23g and a step 36h on the outer peripheral portion of the joint 36 are locked, so that the center cylinder 23 The joint 36 is prevented from coming off from.

(Guide Tube 32) The guide tube 32 has sliding grooves 32b and 32c partitioned by partition walls 32a for accommodating the writing bodies 20 and 21, respectively.
2b and 32c have return springs 32d and 32e, respectively.
The sliding pieces 34a and 34b which are urged rearward by are slidably inserted therein. An inner step 32 for locking the springs 32d and 32e is provided inside the front end of the guide tube 32.
f is formed. An opening 32g for allowing the tip of the pendulum 26 to swing and pass therethrough is provided at the rear end of the guide cylinder 32, and at the opposite side of the side where the clip body 25 is disposed about the axis of the center cylinder 23. An engagement end portion 32h for engaging the guide cylinder 32 with the center cylinder 23, the projection having a narrow width and a rear end portion bulging outward in the axial radial direction.
And a contact step 32i with which the sliding pieces 34a, 34b urged inside the rear end come into contact.

(Cursive Writing Units 20, 21) The two writing units (first and second writing units) 20, 21 are, for example, a lead-out type writing implement and a ballpoint pen. The first writing body 20 has a core feeding mechanism portion 20a at a front end portion and a core pipe 20b connected to the core feeding mechanism portion 20a at a rear end portion. It fits into the moving piece 34a. Further, the second writing body 21 has a core shaft refill 21a into which a ball tip is fitted at a front end, and
The rear end has a receiving pipe 21b for inserting the refill 21a therein, and a sliding piece 34b is fitted to the rear end of the receiving pipe 21b. In the present invention, as long as the number of cursive characters is plural, the number and the type may be three or more and any other type.

(Cap Body 24) FIG. 3 is a detailed illustration of the rear end of the cap body 24. As shown in FIGS. 1 and 3, the cap body 24 is formed in a substantially cylindrical shape, has an extremely gently tapered outer shape, and has a joint 3 therein.
6 is fitted and fixed. Further, the cap body 24
Is located on the window 29 side (the hole 30
A cut window 24a penetrating from the outside to the inside is formed to extend in the axial direction at a predetermined width. The clip body 25 projects outward from the cutout window 24a and extends forward.
The inner peripheral surface of the cap body 24 is provided with the center cylinder 2
3 is slidably fitted into the guide rib 23f,
Guide grooves 24b are formed at three locations corresponding to the guide ribs 23f for fixing the shaft and the cap body 24 freely in the axial direction and in the rotational direction. Further, the cap body 24
A rear end shaft portion 24d having a small diameter at the rear side is formed at the rear end portion via a step portion 24c. The rear end shaft portion 24d covers the rear end shaft portion 24d from the rear side and has an outer periphery thereof. A crown portion 24e formed in a substantially hemispherical shape so that the surface is continuous with the outer peripheral surface of the cap body 24 is detachably fastened.
In this embodiment, the outer peripheral surface of the rear end shaft portion 24d and the crown portion 24
Screw grooves corresponding to each other are formed on the inner peripheral surface of e, and are fastened by screwing them together. Note that an annular retaining ring 24f is provided between the surface facing the rear of the step portion 24c and the front end of the crown portion 24e.

(Joint 36) FIG. 4 is a detailed explanatory view of the joint 36. As shown in FIGS. 1 and 4, the joint 36 has a substantially cylindrical shape, and is formed in the center barrel 23 and the cap body 24 so as to be able to be housed therein. Further, the joint 36 has an opening at the front end and the rear end in the axial direction, and partition walls 36a and 36b are formed at two places spaced apart from each other at a position slightly entering from the opening. . Holes 36c and 36d having different diameters of concentric circles are formed on the inner side from the opening at the front end of the joint 36.
6c and 36d are holes 3 at the rear of the hole 36c at the front of the partition 36a at the stepped portion 36e formed at the front of the partition 36a.
The inner diameter of 6d becomes smaller. A fulcrum 26a at the rear end of the pendulum 26 is locked by a cup-shaped holding member 37 at a position surrounded by a hole 36d at the rear of the step 36e. The outer peripheral surface of the presser 37 is tightly fitted into the rear hole 36d, and the outer peripheral surface of a portion 37a that expands like a flange contacts the inner peripheral surface of the front hole 36c at the rear end.
A hole 37b is formed at the center of the shaft for inserting and supporting the pendulum 26 so as to freely swing by its own weight. A spring 38 is provided between the front end surface of the presser 37 and the rear end surface of the guide tube 32 to repel the cap body 24 rearward.

The space surrounded by the partition walls 36a and 36b of the joint 36 is formed as a concave portion 39 which is open toward the mounting side of the clip body 25 and has a substantially rectangular section perpendicular to the axial direction. . The clip body 25 is pivotally supported in the recess 39 by a pivotal support 25a provided at a position parallel to the opening end and slightly forward. On the opposite side of the lower rear end of the concave portion 39, a spring seat portion 39a which is one step lower is formed, and a clip body 25 is provided between the spring seat portion 39a and the clip body 25.
A clip body spring 25d for urging the front end toward the center of the shaft is provided.

The partition 36b of the joint 36 and the partition 3
A notch 36f is formed on the side of the clip body 25 on the side surface rearward from 6b for the stroke in which the clip body 25 swings. An opening rearward from the partition wall 36b is a hole 36g having the same diameter and the same diameter as the hole 36g. In the hole 36g, a substantially cylindrical eraser 40 has a cylindrical eraser stopper 40.
a.

The outer peripheral surface of the front end of the joint 36 has
An outer peripheral step portion 36h is formed to be engaged with the locking step portion 23g on the inner peripheral surface of the rear end portion of the center barrel 23. The outer peripheral surface of the rear end portion is formed in an annular shape around the inner periphery of the cap body 24. A wide groove 36i that engages with the protruding engagement projection 24g is formed.

(Clip Body 25) The clip body 25 extends axially forward along the outer peripheral surface of the cap body 24. In the embodiment, for example, a metal plate material is bent to be hollow. Also, the clip body 25
Is bent from the outer peripheral surface of the clip body 25 toward the axial center and rearward, and further bent outward in the vicinity of the outer peripheral surface of the cap body 24, and the cross-sectional shape of the distal end portion is formed in a substantially triangular shape. ing. Therefore, a portion facing the inside rearward of the front end of the clip body 25 is the locking portion 28. Further, the clip body 25 is attached to the joint 36 such that the tip end is located at the window 29 of the cap body 25. (Writing state maintaining mechanism 27) The writing state maintaining mechanism 27 is configured such that the cap body 24 moves forward and enters the hole 30 through the window 29 of the cap body 24 , and the locking part 28 has a rear end face of the hole 30. 30a. (Writing body immersion part) The writing body immersion part includes a portion that is rearward from the support shaft 25a of the clip body 25, a portion that is bent from the outer peripheral surface of the distal end portion of the clip body 25 toward the axial center and rearward, and a cap. The outer surface of the body 24.

(Assembly of Double Writing Instrument) When assembling the double writing instrument having the above-described components, first, the guide cylinder 32 is assembled.
The sliding pieces 34a, 34b are set inside the return spring 32.
d and 32e. At this time, the sliding piece 34
a, 34b, the respective cursives 20, 21 are attached. Next, the pendulum 2 is inserted into the holes 36c and 36d in front of the joint 36.
In a state where 6 is inserted, the holding member 37 is fixed by bonding or the like, and the pendulum 26 is fixed to the joint 36 so as to be swingable by its own weight. The joint 36 is elastically deformed and inserted into the middle barrel 23 from the front (or from the rear). At this time, the spring 38 is inserted into the hole 36c.

Next, the guide cylinder 32 is fitted into the center cylinder 23. At this time, the guide tube 32 is slid backward while the engaging end 32h of the guide tube 32 is elastically deformed and fitted in the guide groove 23b of the center shaft tube 23.
Abuts against the locking step 23d of the central barrel 23,
The rear end of the engaging end 32h is fitted into the locking hole 23c of the central barrel 23, and the guide barrel 32 is engaged with the central barrel 23 to integrate them. The guide tube 32 and the joint 3
6, a spring 38 is interposed, and a joint 36
Are made to move freely in the axial direction in the middle barrel 23.

Next, the cap body 24 is fitted to the rear end of the joint 36 and is fitted to the rear end of the central barrel 23 so as to cover it. At this time, the engagement groove 36i and the engagement protrusion 24g of the cap body 24 are fitted and engaged. Also, the inner cylinder 23 is inserted into the inner type guide groove 24b of the cap body 24.
The guide ribs 23f are slidably fitted to each other, so that the cap body 24 and the central barrel 23 are freely movable in the axial direction and integrated in the rotation direction. The front barrel 22 is fitted and fixed to the middle barrel 23 from the front thereof.

Further, the clip 25 is connected to the joint 3 from outside.
When inserting and fixing in the joint 6, the spring 39b is placed on the spring seat 39a in the recess 39 of the joint 36,
The clip body 25 having the shaft support 25a is inserted into the recess 39 to fix the shaft support. An eraser 40 is attached to the rear end of the joint 36 via an eraser stopper 40a.

(Operation of Double Writing Instrument) The double writing instrument of the embodiment is in the state shown in FIG. 1 when not in use, and is in the state shown in FIG. 5 when in use. When using this dual-purpose writing instrument, first, the desired writing body 20 or 21 is tilted downward and the cap body 25 is tilted.
The crown part 24e at the rear end is pushed forward. Then, the pendulum 26 moves forward with the front end of the pendulum 26 facing the rear end of the sliding pieces 34a, 34b fitted to the rear end of the desired writing body 20 or 21, and pushes. Go forward 20 or 21. And the clip body 25
The locking portion 28 faces the hole 30 through the window 29 and is immersed in the hole, so that the rear end of the locking portion 28 and the rear end surface of the hole 30 are engaged with each other to form a clip body. The rearward movement of 25 is stopped. As a result, the state where the desired cursive object is protruded from the tip of the front barrel 22 is maintained.

To retract the current writing body into the front barrel 22 after the use is finished or another writing body 20 or 21 is desired, push the pressing portion 25b of the clip body 25 toward the center of the shaft. Push. As a result, the locking portion 28 at the front end of the clip body 25 is unlocked from the hole 30 and the cap body 24
Is returned to the non-use state in FIG.

If the user forgets to retract the writing body 20 or 21 and tries to insert it into the pocket, the lip of the pocket enters the outer surface of the cap body 25 and the inside of the front end of the clip body 24. Stop 28 and hole 3
Since the engagement with 0 is automatically disengaged, the clothes do not become dirty.

Although the connecting portions 22a and 23a are formed by screw portions, it is also possible to form a resiliently engageable locking portion by combining protrusions, grooves and the like between each other. Further, in the above-described embodiment, a two-color dual-purpose writing instrument in which two sliding grooves are provided in the guide 32 is shown. However, multicoloring such as providing three or four places is possible according to demand. In addition, although the center cylinder and the guide cylinder have a two-part structure, in order to further simplify the structure, the center cylinder and the guide cylinder are integrated, and the joint is elastically connected from the rear end side of the center cylinder. It is also possible to mount using deformation.

[0041]

As described above, according to the present invention, the cap body may be moved forward to select and protrude an arbitrary writing object. There is no stick and looks good.

When the cap body is moving forward,
In the state maintaining means, the engaging portion of the clip body is deeply immersed into the hole of the cylindrical body through the window of the cap body and is engaged with the rear end surface of the hole, so that the engaging portion is deep in the hole. Engagement and reliable locking can be achieved. Therefore, it is possible to reliably maintain the locked state of the writing body. In addition, since the writing body can be protruded by holding the cylindrical body with the hand and pressing the cap body with the finger of the hand, the writing body can be operated with one hand instead of both hands, and the operability is good.

Also, even if the double-type writing instrument is inserted into the pocket with any writing body protruding and the clip is bitten by the outer edge of the pocket, the locking portion of the clip body is separated from the cylindrical body, thereby The cursive, which has been disengaged from the engaging portion, is automatically immersed. Therefore, even if the double-type writing instrument is inserted into the pocket of the clothes, the clothes can be reliably prevented from being stained.

[Brief description of the drawings]

FIG. 1 is an overall cross-sectional view of a double-type writing instrument according to an embodiment of the present invention.

FIG. 2A is a longitudinal sectional view along a shaft for explaining a detailed configuration of a center barrel, and FIGS. 2B and 2C are II and II- in FIG.
It is sectional drawing of each part which follows the II line.

FIG. 3A is a view for explaining a detailed configuration of a cap body;
FIG. 3B is a longitudinal sectional view along the axis, and FIG. 3B is a sectional view along the line III-III in FIG.

4A is a longitudinal sectional view along an axis for explaining a detailed configuration of a joint, and FIG. 4B is a sectional view along a line IV-IV in FIG.

FIG. 5 is an explanatory diagram of an operation state of the double-type writing instrument.

FIG. 6 is an explanatory diagram of a configuration of a conventional double-type writing instrument.

[Explanation of symbols]

 20, 21 Writing body 22 Front barrel 23 Middle barrel 24 Cap body 24a Cut window 24b Guide groove step 25 Clip body 25 25a Shaft support 26 Pendulum 27 Writable state maintaining mechanism 28 Locking part 29 Window 30 Hole 30a Rear End face 39 Recess 39a Spring seat

Continued on the front page (56) References Japanese Utility Model 4-15586 (JP, U) Japanese Utility Model 4-124692 (JP, U) Japanese Utility Model 1-125689 (JP, U) Japanese Utility Model 5-14878 (JP, U.S.A.) , Y2) Jikgyo Hei 4-53986 (JP, Y2) (58) Field surveyed (Int. Cl. ⁷ , DB name) B43K 24/00-25/02

Claims (1)

(57) [Claims] 1. A cylindrical body enclosing a plurality of writing bodies and hollowed from a front end to a rear end of any of the writing bodies, and a cylinder enclosing a rear part of the cylindrical body. A cap body capable of moving forward and backward along the front-back direction of the body, a clip body swingably supported by a rear portion of the cap body, and extending forward along an outer peripheral wall of the cap body; A writing element selecting unit that causes any one of the plurality of writing elements to protrude from the front end of the cylindrical body by advancing the cap body, and a writing state maintaining unit that maintains a protruding state of the arbitrary writing element; In the compound writing instrument having a writing body immersion part for immersing the protruding writing body, the clip body has a front end urged toward the axial center of the cylindrical body, and a locking part is provided at the front end. The writing state maintaining unit is provided on the cap body. A window portion perforated so as to expose the inside of the cap body at a position facing the locking portion, and a tube facing the locking portion when the cap body advances to a position where the arbitrary writing body projects. A hole drilled toward the inside of the cylindrical body at a position of the body, and a rear end surface of the hole is formed in a shape to be locked by the locking portion; Is a double-sided writing instrument, characterized in that the side surface of the cylindrical body at the front end of the clip body is formed on an inclined surface facing the center of the cylindrical body and toward the rear.