JPH09277782A - Double writing implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To deliver a lead without changing the grip of a shaft cylinder each time by pressing the upper surface of a side button to be inserted in a recess, causing the tip-end to come in touch with the inclined surface of a cam part of sliding pieces, and advancing the mechanical pencil writing implements on a straight line in association with the advance of the sliding pieces for delivering the lead. SOLUTION: Each insertion hole is provided on cylindrical parts 16a 16b in front of sliding pieces 14a, 14b, and the rear ends of mechanical pencil writing implements 20a, 20b are detachably secured in each insertion hole, and then cam grooves 15a, 15b are formed on the rearward inner surface sides of the cylindrical part 16a, 16b for the front and rear movement of the sliding pieces through pressure of projections 6a, 6b caused by rotation of a rotating shaft 4. Also, on the outer peripheries of the sliding pieces 14a, 14b, grooves 27a, 27b are formed to be engaged for rotative prevention with guiding ribs 2 of a rear shaft 1. Thus, the grooves 27a, 27b provided at each side surface of the sliding pieces 14a, 14b come in engagement with the guiding ribs 2 respectively, thereby causing the sliding pieces 14a, 14b to moving forward and rearward smoothly to deliver lead.

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.

[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. SUMMARY OF THE INVENTION An object of the present invention is to make it possible to provide an extremely easy-to-use dual writing instrument having both conveniences. However, when a plurality of writing bodies are projected from the tip opening, it is necessary to bend the writing body and the sliding portion that follows. Also, in the case of the side knock type, it is more difficult to bend the writing body because the sliding portion needs to slide on a straight line.
The present invention also aims to solve this problem.

[0005]

According to the present invention, there is provided a writing instrument comprising:
In a dual-type writing instrument that is equipped with two types of writing bodies, at least one of which is a mechanical pencil, and can selectively project and retract the respective writing tips from the tip mouths, alternately in the forward retracted position in the barrel. A pair of sliding pieces to be positioned on the sliding piece are connected to the tip of each sliding piece, and the writing piece is connected to the tip of each sliding piece. A concave portion is provided on the front surface of the concave portion, and a cam portion having an inclined surface on the rear side is formed on the front surface of the concave portion. A window portion is provided, a side button is attached to the rear end of the window portion, and a front end portion thereof is attached to the axial center side of the barrel, and a side button having a tip port at the tip of the barrel is further mounted. The side button is pivotally supported to press the upper surface of the side button so that the side button is pushed into the recess. Collides with the inclined surface of the tip cam portion of the sliding piece as well as entering, the mechanical pencil writing body is advanced in a straight line 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 types of mechanical pencil writing materials 20a and 20b 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 part of the writing instrument mechanism, and an operating body 9 arranged at the rear end of the rear shaft. In addition, a spherical shaft support portion 18a is partially formed at the tip of the tip shaft 18 on the circumference or at a required portion on the circumference, and the inside of the rear of the tip portion 19 having the tip opening 19a corresponding thereto is formed. A groove 19b that engages with the shaft supporting portion 18a is formed in the peripheral portion, and in a state where they are elastically engaged with each other, the tip portion 19 is coupled to the tip of the tip shaft 18 so as not to come off and swing. To be done. There are various coupling means for the tip shaft and the tip portion, but it is also possible, for example, to interpose a ring member or an elastic body between the tip shaft and the tip portion.

Further, a male screw 3 is formed on the front portion of the rear shaft 1 and is screwed with a female screw 18b of the front shaft 18, and is removed as necessary to replace a writing body. Further, a rib 1a (see FIG. 3) for preventing rotation, which restricts a rotation range of a rotary shaft 4 described later, is formed on the inner periphery of the rear end of the inner hole of the rear shaft 1, and a step portion 1b is provided. A guide rib 2 formed in the axial direction is formed at a required position 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 projection 6a on the front peripheral surface of the small diameter portion 5 and a projection 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 tubular portion 10 provided at the rear end of the rear shaft 1 and a clip 12 extending forward from one side surface of the outer peripheral portion of the tubular 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.

The 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 20a, 2 described later.
The rear end of 0b 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 27a and 27b are provided on the outer circumferences of the sliding pieces 14a and 14b to engage with the guide ribs 2 of the rear shaft 1 in a rotation-stop manner.

Therefore, the grooves 27a and 27b 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
4a and 14b are in contact with each other on their flat sides, but a guide projection 26a is inserted into the sliding piece 14a and a guide projection 26a is inserted into the sliding piece 14b in order to make the sliding between them smoother. 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 concave portion 23 is formed on the side surface on the axial center side of the rear shaft 1, which is opposed to the front ends of the sliding pieces 14a, 14b.
a and 23b are provided, and cam portions 17a and 17b having inclined surfaces on the rear side are formed on the front surface of the concave portion, respectively, and on the same position as the concave side surface at the forward position of one sliding piece. The rear shaft 1 is provided with a window portion 24, and the window portion 2
4, a side button 25 is mounted which is pivotally supported at the rear end (shaft support portion 24a) and whose front end portion 25b is movable toward the axial center of the rear shaft. or,
Properly bulged locking portions 25a are formed on both side surfaces of the side button 25 on the rear shaft insertion side, and the locking portions 25a are formed on the rear shaft 1 of the window portion 24.
The side button 25 is prevented from coming off the window portion 24 by engaging with the inner hole wall.

Further, the rear ends of the mechanical pencil writing bodies 20a, 20b (via the core pipes 22a, 22b) are fixed to the insertion holes of the sliding pieces 14a, 14b, respectively, and the front shafts are arranged in front of the rear shaft 1. 18 is fixed. As described above, as shown in FIGS. 1 and 2, by pressing the upper surface of the side button 25, the side button 25 is inserted into the recess 23a and the tip portion 25 is inserted.
b abuts against the inclined surface of the cam portion 17a of the sliding piece 14a,
The sliding piece 14a is moved forward, and in conjunction with this, the mechanical pencil writing body 20a is moved forward so that the lead can be drawn out. Further, the mechanical pencil writing bodies 20a and 20b are used for a normal compound writing instrument, and are capable of feeding out sharp cores having 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 to move the axis of the lead pipe 22a to move the lead in conjunction with.

[0016]

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.
By rotating along the cam grooves 15a, 15b of the 4a, 14b, one of the sliding pieces moves forward and the other moves backward, and the tip of the forward-sided mechanical pencil writing body swings the tip 19 of the pencil. Then, it becomes possible to linearly project from the tip end port 19a.

6 to 8 show a state in which the sliding pieces 14a, 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 20a 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. When the side button 25 is pushed into the rear shaft in this state (shown in FIG. 3), the tip portion 25b abuts on the cam portion 17a and the sliding piece 1 is pushed.
4a is advanced, and the mechanical pencil writing material 20a is advanced. When the pressure is released, it returns to the original state. Therefore, pressing the side button 25. The core is paid out by repeating the release.

Next, when the rotary shaft 4 is rotated, the sliding piece 14 is rotated.
a is retracted, the tip of the mechanical pencil writing body 20a is retracted into the tip shaft 18, and the sliding piece 14b is advanced. 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 is further advanced, and the tip portion of the mechanical pencil writing body 20b is the tip end portion 1 of the tip portion 1.
It projects from 9a. FIG. 8 shows the relationship between the rotating shaft and the sliding piece corresponding to this state. Further, the contact portion 7d of the groove 7a of the large-diameter portion 7 of the rotating shaft shown in FIG. 3 contacts the rib 1a of the rear shaft to regulate the other rotation. In this state, press the side button 25. By repeating the release, the core is extended in the same manner as described above.

If one side is a writing body such as a ball-point pen, ribs or the like may be 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 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.

[0021]

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, it is possible to provide a compound writing instrument that is easy to use and convenient to carry. Further, since the cursive body can slide on a straight line, the operation is smooth, and problems such as core breakage are unlikely to occur.

[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 in a state where the mechanical pencil writing body 20a is projected. Incidentally, the sliding piece is shown in a shape with the front cut off, as in FIG. The same applies to the following figures.

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 diagram 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 in a state where the mechanical pencil writing body 20b 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 part 8b Split groove 8c Collar part 8d Groove 9 Operating body 10 Cylindrical part 11 Crown 12 Clip 13 Spring 14a Sliding piece 14b Sliding piece 15a Cam groove 15b Cam groove 16a Cylindrical part 16b Cylindrical part 17a Cam part 17b Cam part 18 Tip shaft 18a Shaft support portion 18b Female screw 19 Tip portion 19a Tip opening 19b Recessed groove 19c Inner step portion 20a Mechanical pencil writing material 20b Mechanical pencil writing material 21a Step portion 21b Step portion 22a Core pipe 22b Core pipe 23a Recess 23b Recess portion 24a Shaft support 25 Side button 25a Locking part 25b Tip part 26a Guide protrusion 27a Groove 2 b groove

Claims (3)

[Claims] 1. A compound writing instrument, comprising at least two writing instruments, at least one of which is a mechanical pencil, capable of selectively projecting and retracting each writing tip portion from a tip opening in a barrel. A pair of sliding pieces, which are alternately positioned in the frontward retracted position, are provided, and a writing body is connected to the tip of each sliding piece. A concave portion is provided on a side surface on the axial center side, a cam portion having an inclined surface on the rear side is formed on the front surface of the concave portion, and the same position as the concave side surface of the sliding piece at the forward position of the sliding piece is formed. A window is formed in the shaft cylinder immediately above, and a side button is attached to the rear end of the window and the tip of which is movable toward the shaft center of the shaft. The tip of the side button having an end opening is pivotally supported so that the side button is pressed by pressing the upper surface of the side button. Is inserted into the recess and the tip end abuts the inclined surface of the cam part of the sliding piece, and the sliding piece is moved forward, and in conjunction with this, the mechanical pencil writing system is advanced linearly to allow the lead to be drawn out. Double-ended writing instrument. 2. The compound writing instrument according to claim 1, wherein the two types of writing materials are mechanical pencil writing materials. 3. A shaft cylinder is composed of a front shaft and a rear shaft, a tip portion of the front shaft is pivotally supported, and a rear shaft is rotatably disposed with respect to the rear shaft and is forwardly mounted. A rotary shaft having two protrusions formed on the rear shaft, an operating body fixed to the rear end of the rotary shaft protruding to the rear end of the rear shaft, and the operating body and the rotary shaft being rotatable with respect to the rear shaft, In addition, a pair of sliding pieces, which are held inside the projecting state of the mechanical pencil so as to be able to move along the axis, are formed with slanting cam grooves that engage with the projections of the rotating shaft facing each other, respectively. It is guided to the inner hole of the robot so that it can move only back and forth, and by the rotation of the rotary shaft accompanying the rotation of the operating body, each sliding piece moves back and forth alternately, and the writing tip of each writing body moves from the tip of the tip axis. The compound writing instrument according to claim 1 or 2, wherein the compound writing instrument is configured to be capable of appearing and disappearing.