JPH09254587A - Dual writing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to prevent the fatigue of fingers by covering the periphery of a barrel with a rubber grip by covering a slide button in a bulged state, and urging the site of the grip directly above the button to make it possible to feed the lead of a mechanical pencil writing element. SOLUTION: The outer surface of a rear barrel 1 is covered with a rubber gripper 29 having a bulged part 29a which covers the outer periphery of a side button 26 suitably bulged from the periphery of the barrel 1. The part 29a is urged to insert the button 26 into a recess, and the end 26b is collided in contact with the oblique surface of the cam part 17a of a sliding top 14a. Thus, the top 14a is advanced, a mechanical pencil writing element 21a is advanced by interlocking to the advancing of the top 14a to feed a lead. In this manner, at the time of using the pencil, the lead can be fed even without transferring to carry the barrel, and since the grip 29 is provided, the handling operability is excellent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is equipped with two types of writing bodies, at least one of which is a mechanical pencil, and selectively allows each writing tip portion to appear and disappear alternately from the tip opening of a barrel. The present invention relates to a compound writing instrument in which a side button provided on a side surface of a shaft cylinder can be pushed out in a state where a pencil is projected so that a lead can be drawn out.

[0002]

2. Description of the Related Art In general, there is known a double-type writing instrument having a plurality of writing objects such as a mechanical pencil and a ball-point pen mounted thereon so that a writing tip can be selectively protruded and retracted from an axis. In addition, as the mechanism of the writing tip of the double-type writing instrument,
Various types are known, such as a knock type, a slider type that alternately slides a slider that protrudes from the side surface of a writing barrel, and a cam type that rotates a cam cylinder having an inclined surface.

Further, a window is formed near the gripping fingertip of the barrel, a side button is pivotally supported in the window, and a slider having an inclined surface is provided behind the chuck. 2. Description of the Related Art A side-knock type mechanical pencil is known in which a leading end thereof abuts against an inclined surface of a slider to advance the slider and advance a chuck to draw out a lead. or,
It is well known to provide a rubber grip on the grip of a writing instrument.

[0004]

A so-called compound writing instrument having a plurality of writing instruments is convenient as a portable writing instrument.
The side-knock mechanical pencil is convenient in that the core can be extended without having to change the barrel. or,
A writing instrument having a rubber grip at the grip has an effect that the fingers do not get tired. It is an object of the present invention to provide an extremely easy-to-use compound writing instrument having the above convenience.

[0005]

According to the present invention, there is provided a writing instrument comprising:
In a multiple-type writing instrument that is equipped with two types of writing bodies, at least one type of which is a mechanical pencil, and can selectively project and retract the respective writing tips from the tip opening of the barrel, alternately in the barrel. A pair of sliding pieces positioned at the front retracted position are arranged, a cam portion having an inclined surface on the rear side is provided in front of each sliding piece, and a cursive body is further connected in front thereof. A window portion is formed in the shaft cylinder immediately above the same position as the cam portion at the forward position of the sliding piece on the mechanical pencil side, and the window portion is pivotally supported at the rear end of the window portion and the front end portion is on the shaft center side of the shaft cylinder. A side button that bulges outwardly from the surface of the shaft cylinder is appropriately attached, and the side button is covered in a bulging shape, and a rubber grip is fitted on the peripheral surface of the shaft cylinder. By pressing the area directly above the button, the tip of the button will Collides on the slopes, and to advance the mechanical pencil cursive to allow feeding the core in conjunction with it to advance the sliding piece.

[0006]

1 to 8 show an embodiment of the present invention. In FIG. 1, two kinds of mechanical pencils 21a and 21b are provided. The compound writing instrument intended by the present invention is at least one type of mechanical writing instrument, and the other writing instruments such as a ballpoint pen can be used.

The compound writing instrument of FIG. 1 comprises a front shaft 18 and a rear shaft 1 for accommodating a portion of the writing instrument mechanism located at the front part, and an operating body 9 arranged at the rear end of the rear shaft. A female screw 19 is formed on the inner periphery of the rear portion of the front shaft 18. A male screw 3 is formed at a front portion of the rear shaft 1 and is screwed with the female screw 19 of the front shaft 18, and is removed as necessary to replace a writing body. A rib 1a for preventing rotation is provided on the inner periphery of the rear end of the inner hole of the rear shaft 1 for restricting a rotation range of a rotating shaft 4 described later.
(See FIG. 3) and has a step 1b.
A guide rib 2 formed in an axial direction is formed at a required location on the front inner peripheral portion of the rear shaft 1.

The rotary shaft 4 has a small diameter portion 5 in front of the large diameter portion 7, a protrusion 6a on the front peripheral surface of the small diameter portion 5 and a protrusion 6b on the opposite peripheral surface. A locking portion 8 having a reduced diameter shaft portion 7b behind the large diameter portion 7 and a shaft portion 8a and a split groove 8b formed in a rear end flange portion 8c is provided behind the shaft portion 7b. Have been. A groove 8d (or a rib) for stopping rotation with an operating body 9 described later is provided on the peripheral surface of the shaft portion 8a. Further, the rib 1 of the rear shaft 1 is provided on the peripheral surface of the large diameter portion 7.
A groove 7a which engages with the rear shaft 1 and regulates rotation of the rotary shaft 4 is provided between the rear shaft 1 and the rear shaft 1 within a range of approximately 120 degrees.

The operating body 9 is formed of a cylindrical portion 10 which is mounted on the rear end of the rear shaft 1 and a clip 12 which extends forward from one side surface of the outer peripheral portion of the cylindrical portion 10. A ball portion is provided on the inner side of the front end of the clip 12, and a groove 8d (or rib) provided on the peripheral surface of the shaft portion 8a of the rotary shaft 4 is engaged in the hole portion of the rear end portion 10a of the cylindrical portion 10. A mating rib (or groove) (not shown) is provided, and as will be described later, the collar portion 8c of the rotary shaft 4 extends to the rear end of the rear end portion 10a so that the rotary shaft 4 and the operating body 9 are separated from each other. It is fixed.

A cylindrical portion 16 in front of the sliding pieces 14a, 14b
a and 16b are respectively provided with insertion holes, and each of the insertion holes has a mechanical pencil writing body 21a, 2 described later.
The rear end of 1b is detachably fixed. In addition, the tubular portion 16a,
Cam grooves 15a and 15b are formed on the inner surface side of the rear portion of 16b for moving the sliding pieces back and forth by the pressing of the projections 6a and 6b accompanying the rotation of the rotary shaft 4. Grooves 28a, 28b are provided on the outer circumferences of the sliding pieces 14a, 14b so as to engage with the guide ribs 2 of the rear shaft 1 to prevent rotation.

Therefore, the grooves 28a and 28b provided on the side surfaces of the sliding pieces 14a and 14b mesh with the guide ribs 2 to smoothly move the sliding pieces 14a and 14b back and forth. The cross-sectional shape of the sliding pieces 14a and 14b is substantially D-shaped. Therefore, it is often shown in the conventional example,
There is an advantage that a complicated structure for mounting a guide cylinder having two guide grooves facing each other is not required. Also, sliding piece 1
The flat sides of 4a and 14b are in contact with each other, but in order to make the sliding between them smoother, a guide projection 27a is inserted into the sliding piece 14a and a guide projection 27a is inserted into the sliding piece 14b. A groove (not shown) is provided.

The rotary shaft 4 has the sliding piece 14a,
14b is inserted into the inner hole of the rear shaft 1 with the protrusions 6a, 6b engaged, and the rear end of the large diameter portion 7 is brought into contact with the step portion 1b of the rear shaft, and the rear shaft 1 End and rear end 10 of the operating body 9
The operating body 9 is fixed to the rear end shaft portion 8a of the rotary shaft 4 with the spring 13 biased between the front end of the a and the front end. At this time, the locking portion 8 of the rotating shaft engages with the hole of the rear end portion 10a of the operating body, and the rotating shaft 4 and the operating body 9 are integrally fixed, and the operating body 9 rotates with respect to the rear shaft 1. As a result, the rotating shaft 4 rotates, with which one sliding piece moves forward and the other sliding piece moves backward. A crown 11 is fixed to the rear end of the operation body 9. As described above, when the crown 11 is knocked against the rear shaft 1, the rotary shaft 4 moves axially, and in conjunction with that, the sliding piece 14 is moved.
The axes a and 14b are shifted.

By the way, a recess 25 is formed in the side surface on the axial center side of the rear shaft 1, which is opposed to the front of the sliding pieces 14a, 14b.
a and 25b are provided, and cam portions 17a and 17b having inclined surfaces on the rear side are formed on the front surfaces of the concave portions, respectively. A window 24 is formed in the rear shaft 1 and the window 2
4 is mounted on a side button 26 which is pivotally supported at the rear end (shaft support 24a) and whose tip 26b is movable toward the axis of the rear shaft. or,
Protruding locking portions 26a are appropriately formed on both side surfaces of the side button 26 on the rear shaft insertion side, and the locking portions 26a are attached to the rear shaft 1 of the window portion 24.
The side button 26 is prevented from coming out of the window 24 by engaging with the inner hole wall.

Further, a rubber grip 29 having a bulging portion 29a which covers the outer periphery of the side button 26 which bulges appropriately from the peripheral surface of the rear shaft 1 is fitted on the outer surface of the rear shaft 1. Further, the rear ends of the mechanical pencil writing bodies 21a and 21b (via the core pipes 23a and 23b) are fixed to the insertion holes of the sliding pieces 14a and 14b, respectively, and the front shaft 18 is fixed in front of the rear shaft 1. To be done. As described above, as shown in FIG. 2, the side button 26 is inserted into the recess 25a by pressing the bulging portion 29a of the rubber grip immediately above the side button 26, and the tip portion 26b is inserted.
Collides with the inclined surface of the cam portion 17a of the sliding piece 14a, advances the sliding piece 14a, and in conjunction therewith, the mechanical pencil writing body 21a advances to enable the lead to be drawn out. Further, the mechanical pencils 21a and 21b are used for ordinary double-type writing implements, and are capable of feeding out sharp cores of different colors or core diameters. Further, according to the embodiment, when the rear end of the crown 11 is knocked, the sliding piece 14a is knocked.
It is also possible for the core pipe 23a to shift the axis and to draw out the core in conjunction with the above.

[0015]

When the operating body 9 is rotated about 120 degrees with respect to the rear shaft 1, the protrusions 6a and 6b associated with the rotation of the rotary shaft 4 slide on the sliding piece 1.
4a, 14b are rotated along the cam grooves 15a, 15b so that one of the sliding pieces moves forward and the other moves backward, so that the tip end of the mechanical pencil writing body on the advance side is moved to the tip end of the tip shaft 18. It is possible to project from.

6 to 8 show a state in which the sliding pieces 14a and 14b move back and forth with respect to the rotation of the rotary shaft 4. As shown in FIG.
Incidentally, since the respective sliding pieces overlap the rotating shaft, they are shown separately for the sake of explanation. First, FIG. 1 shows a state in which the mechanical pencil writing body 21a is projected, and the relationship between the rotary shaft and the sliding piece corresponding to this state is shown in FIG. At that time, the rib 1a of the rear shaft 1 comes into contact with the contact portion 7c of the groove 7a of the large-diameter portion 7 of the rotary shaft to regulate one rotation. In this state, when the side button 26 is pressed and pushed into the rear shaft, the tip 26a comes into contact with the cam 17a, and the sliding piece 1 is pressed.
4a is advanced, and the mechanical pencil 21a is advanced. When the pressure is released, it returns to the original state. Therefore, pressing the side button 26. The core is paid out by repeating the release.

Next, when the rotating shaft 4 is rotated, the sliding piece 14 is rotated.
As a retreats, the tip of the mechanical pencil 21a penetrates into the front shaft 18, and the sliding piece 14b moves forward. At that time, the writing tip end portion is accommodated in the front shaft 18 and is in a portable state, and the relationship between the rotary shaft and the sliding piece corresponding to that state is shown in FIG.

When the rotary shaft 4 is further rotated, the sliding piece 14a
Is further retracted, the sliding piece 14b further advances, and the tip of the mechanical pencil 21b projects from the tip end of the front shaft 18. FIG. 8 shows the relationship between the rotating shaft and the sliding piece corresponding to this state. Also, the groove 7 of the large diameter portion 7 of the rotary shaft shown in FIG.
The contact portion 7d of "a" contacts the rib 1a of the rear shaft to regulate the other rotation. In this state, the side button 26 is pressed. By repeating the release, the core is extended in the same manner as described above.

In the case where one side is a writing body such as a ball-point pen, if a rib or the like is provided on the peripheral surface of the shaft portion 7b behind the large diameter portion 7 of the rotary shaft so as to substantially abut on the rear end of the rear shaft 1. It is also possible to prevent knocking when the cursive pen is projected or when the cursive body is stored. However, a structure is required in which the rib is fitted into the rear end of the rear shaft when the writing instrument of the mechanical pencil projects so that knocking is not hindered.

[0020]

The structure and operation of the multiple writing instrument of the present invention are as described above, and it has a simple structure and at least one type has two types of writing bodies as mechanical pencils. Since the core can be extended without changing the tube and it has a rubber grip, it is possible to provide a compound writing instrument that is easy to use and convenient to carry.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing the entirety of a double-type writing instrument according to an embodiment of the present invention, which is partially shown in a non-cross-sectional view.

FIG. 2 is a perspective view showing a protruding side of a mechanical pencil in a CC cross sectional state in FIG.

3 shows a cross-sectional view taken along the line AA in FIG.

FIG. 4 is a perspective view showing the shape of a rotating shaft.

FIG. 5 is a perspective view showing a rear portion of one sliding piece 14a in the B section shown in FIG.

FIG. 6 is a view for explaining the positional relationship between the rotary shaft and the sliding piece due to the rotation of the rotary shaft, and shows the positional relationship when the mechanical pencil writing body 21a is projected.

FIG. 7 is a diagram for explaining the positional relationship between the rotary shaft and the sliding piece that accompanies the rotation of the rotary shaft, and shows the positional relationship when the cursive body is accommodated in the tip shaft.

FIG. 8 is a view for explaining the positional relationship between the rotary shaft and the sliding piece accompanying the rotation of the rotary shaft, and shows the positional relationship in a state where the mechanical pencil writing body 21b is projected.

[Explanation of symbols]

 1 Rear Shaft 1a Rib 1b Step 2 Rib for Guide 3 Male Screw 4 Rotation Shaft 5 Small Diameter 6a Projection 6b Projection 7 Large Diameter 7a Groove 7b Shaft 7c Contact 7d Contact 8 Locking 8a Shaft section 8b Split groove 8c Collar section 8d Groove 9 Operating body 10 Cylindrical section 10a Rear end section 11 Crown crown 12 Clip 13 Spring 14a Sliding piece 14b Sliding piece 15a Cam groove 15b Cam groove 16a Cylindrical section 16b Cylindrical section 17a Cam section 17b Cam part 18 Leader shaft 19 Female screw 20 Inner step part 21a Mechanical pencil writing material 21b Mechanical pencil writing material 22a Step part 22b Step part 23a Core pipe 23b Core pipe 24 Window part 24a Shaft supporting part 25a Recess 25b Recess 26 26 Side button 26a Stop 26b Tip 27a Guide protrusion 28a Groove 28b Groove 29 Rubber grip 29a Swelling portion

Claims (2)

[Claims] 1. A compound writing instrument in which at least two writing instruments, at least one of which is a mechanical pencil, is mounted, and the writing tips of the writing instruments can be selectively retracted from the tip opening of the barrel. A pair of sliding pieces that are alternately positioned in the frontward retracted position are arranged in the cylinder, and a cam portion having an inclined surface on the rear side is provided in front of each sliding piece and further in front of it. A writing body is connected, a window portion is bored in the shaft cylinder immediately above the same position as the cam portion at the forward position of the sliding piece on the mechanical pencil side, the window portion is pivotally supported at the rear end of the window portion, and the tip portion is the shaft. A side button that bulges outwardly from the shaft cylinder surface that is movable on the shaft center side of the cylinder is attached, and the side button is further covered in a bulge shape and a rubber grip is fitted on the peripheral surface of the shaft cylinder. By pressing the area right above the side button of the rubber grip, the tip end of the rubber grip is moved to the sliding contact. A compound writing instrument that is capable of striking the inclined surface of the cam part of the ma, moving the sliding piece forward, and interlocking with it to move the mechanical pencil writing element forward to extend the lead. 2. Two types of cursive writing bodies are mechanical pencil cursive writing bodies, a recess is provided on the side surface on the axial center side of the barrel in front of each sliding piece, and the front surface of the recessed portion is inclined rearward. The multiple writing instrument according to claim 1, wherein a cam portion having a surface is formed.