JPH09183297A - Multi-lead writing implement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove a risk of breaking a lead by using a spring of large elastic bounding force to prevent the lead from sinking into a chuck owing to spread of the chuck by application of load to an engaged part in writing. SOLUTION: A plurality of writing implements containing at least one propelling pencil 20 in a shaft main body 1 are provided. Though the writing implement is urged backward by an elastically bounding member 28, the writing implement can be protruded from the shaft body by advancing a pushing member 12 fitted to a rear end of the writing member. A chuck body 5 is arranged to a going out and in opening 32 of the shaft main body, and an outer cylinder for opening and closing that is arranged to the shaft main body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft
A plurality of cursive scripts including at least one pencil,
The writing body is urged rearward by a repelling member, but relates to a multi-core writing implement in which a pressing member attached to the rear end of the writing body is advanced to make the writing body protrude from the shaft body. Things.

[0002]

2. Description of the Related Art Japanese Utility Model Publication No. 56-35354 is known as a multi-core writing instrument in which one of the writing materials is a sharp pencil. The utility model registration claim of Japanese Utility Model Publication No. 56-35354 discloses that "a sharp pencil mechanism 4 and a ball pen mechanism 6 are slidably opposed to each other in a barrel 1. The cylinder 1 has longitudinal guide grooves 2 and 3 formed in the neck so as to face each other.
01 and 802 are slidably fitted to the presser 8 provided so as to face each other, and the sharp pencil mechanism 4 is provided with a chuck 401 provided at the tip of the core case 405, and a tightening for fitting or withdrawing the chuck 401. The ring 402 and the chuck 401 are constituted by an ejecting machine 404 that elastically reciprocates, and an acupressure element 5 is attached to the base end, and a ball pen mechanism 6 is provided with a rolling ball 6 at the tip of the ink tube 601.
02 is provided and the acupressure member 7 is attached to the base end,
The acupressure elements 5 and 7 are arranged so as to face each other on the presser 8 side, and the press legs 801 and 8 are provided on the opposing surface of the acupressure elements 5 and 7 near the presser 8.
Projections 501 and 701 which are engaged with 02 to hold the two mechanisms 4 and 6 projecting from the shaft cylinder 1 are provided in a protruding manner, and the projections 501 and 701 and the press legs 80 are provided in the middle of the facing surfaces of the pressers 5 and 7.
External projections 502 and 702 for releasing engagement with the first and second 802
And the opposite sides of the acupressure elements 5, 7 to the longitudinal guide grooves 2, 3 so as to allow the above-mentioned both mechanisms 4, 6 to penetrate through the inside tool 9 provided in the barrel 1 and the inside tools. A writing instrument characterized in that ammunition machines 10 and 11 are respectively interposed between 9 and acupressure elements 5 and 7 so that both the mechanisms 4 and 6 are always drawn into the barrel 1. It is described.

Further, as an explanation of the operation of the sharp pencil mechanism 4, a detailed explanation will be given as follows.
A presser 8 for adjusting the protruding length of the writing core a of the sharp pencil mechanism 4 from the front opening 403 is slidably fitted to the neck end of 02. In this configuration, two push legs 801 and 802 are provided in a protruding manner, and the pusher 8 is pushed gently, so that both of the push legs 801 and 802 intervene through the acupressure element 5 and the bullet 404 of the sharp pencil mechanism 4 is inserted. ,
The chuck 401, the tightening ring 402, and the like are slidably and reciprocally slid to project the writing core a from the tip 403 as in a known sharp pencil, and the projecting length is adjusted. ("Gazette, Column 3, Line 16, Lines 2 to 2")
Line 6).

[0004]

However, in the above-mentioned prior art, when the member (acupressure element 5) for activating the mechanism for feeding out the core of the sharp pencil projects the sharp pencil from the shaft main body. It also serves as an engaging member for preventing the immersion of the. Therefore, in the writing implement having such a configuration, almost all the load applied to the core, which is generated at the time of writing, is applied to the engaging portion. When the written load is applied to the engaging portion, the state becomes the same as when the core feeding mechanism is pressed. In other words, the chuck expands and the core sinks. Here, in order to prevent the core from sinking, there is a chuck in which the shape of the core biting part is formed in a sawtooth shape so as to bite the core, but the effect is small, and if the biting is large, the core I sometimes crushed. It is also possible to use a spring that has a large resilience (for opening and closing the chuck and feeding out the lead) so that the lead-out mechanism does not operate easily. Not only is this necessary and the pressing operation becomes difficult, but also the gripping force of the core becomes large, which also poses the risk of breaking the core.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a shaft inside a shaft body.
A plurality of cursive scripts including at least one pencil,
The cursive body is biased rearward by an elastic member, but by pushing a pressing member attached to the rear end of the cursive body forward, the cursive body is projected from the shaft body. In the writing instrument, a gist is that a chuck body is arranged in a writing body entrance / exit opening of the shaft body, and an outer cylinder for opening and closing the chuck body is arranged in the shaft body.

[0006]

The writing body such as a sharp pencil or a ball pen is gripped by the chuck body and integrated with the shaft body.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example will be described with reference to FIGS. This is a multi-core writing instrument in which a sharp pencil and two ball pens are slidably arranged. One type of sharp pencil and boring
It is not a combination with a rupen,
It may be a pencil, or a combination of a ball pencil of two or more colors and a sharp pencil. Reference numeral 1 denotes a shaft body, and the shaft body 1 is
It comprises a front shaft 2 and a rear shaft 3. Also, front shaft 2
Is the center shaft 4, the chuck body 5, and the chuck body 5
And an outer cylinder 6 that opens and closes. The outer cylinder 6
Is urged forward by an elastic member 7 such as a coil spring arranged on the chuck body 5, and can be rotated and moved back and forth with respect to the chuck body 5. In addition, in this example, the center shaft 4 and the chuck body 5 are configured by a screwing structure, but may be a means such as press fitting or fitting, or may be integrally formed. .

The rear shaft 3 is formed with three slits 8 in the longitudinal direction thereof. In this example, three slits 8 are formed, but this is because there are three writing pencils, a sharp pencil and two ball pens.
The number of slits varies depending on the number of cursives. The slit 8 is formed up to one end of the rear shaft 3, and sliding grooves 9 are formed on both sides in the longitudinal direction of the slit 8. However, this sliding groove 9
Are not formed over the entire length on both sides of the slit 8, but are formed only up to the middle portion. Legs 10 are formed in front of the rear shaft 3. This leg 1
0 is formed by forming the slit 8.
Therefore, the number of legs 10 also changes depending on the number of cursive materials. Also, the lengths of the legs 10 are not the same but different. Specifically, the upper leg is formed to be shorter than the two lower legs 10 in FIG. This is intended to facilitate the assembling of the rear shaft 3 to the center shaft 4. Reference numeral 11 is a clip portion formed on the side surface of the rear shaft 3.

In the slit 8 of the rear shaft 3, sliders (moving members) 12 and 13 for protruding and retracting ball pens, in which concave and convex portions are formed at portions where fingers come into contact, and sliders for retracting and retracting a sharp pencil. -14 is slidably arranged. Sliding protrusions 15 are formed on both sides of the sliders 12 to 14 in the longitudinal direction and slidably engage with a sliding groove 9 formed in the slit 8. Two releasing projections 16 and 17 are formed on the back surfaces of these sliders 12 to 14 at intervals, and a ballpoint pen 18 which is a cursive body is provided at the front ends of the sliders 12 and 13. A spherical connecting portion 19 for connecting the above is formed. On the other hand, a press-fitting portion 21 for connecting the sharp pencil 20 is formed at the front end portion of the other slider 14.
The slider 14 is arranged so as to be embedded in the shaft body 1.

A knock groove 22 is formed in the center of the slider 14 for retracting the sharp pencil in the longitudinal direction, and a connecting rod 23 is slidably arranged in the knock groove 22. ing. Further, at one end of the connecting rod 23, a knock piece 24 that gives a moving operation to the connecting rod 23 is integrally formed, but they may be formed by separate members and fixed to each other. Reference numeral 25 is a protrusion formed in the intermediate portion of the connecting rod 23, and the protrusion 25 slides on a notch portion 26 formed in the intermediate portion of the slider 14 to thereby form the connecting rod 23. In addition, the rotation of the knock piece 24 and the protrusion from the shaft body 1 are prevented. Also,
Reference numeral 27 attached to the tip of the connecting rod 23 is a pressing portion for pressing the rear end of the lead tank of the sharp pencil 20, and is formed to have a diameter slightly larger than the diameter of the connecting rod 23.

Reference numeral 28 is an elastic member such as a coil spring that biases the two ball pens 18 and the sharp pencil 20 and the sliders 12 to 14 connected to the cursive body to the rear side. is there. A restricting portion 29 is formed at an intermediate portion of the center shaft 4, which is a member of the front shaft 2,
The restricting portion 29 has three through holes 30 into which the cursive body is loosely inserted. The elastic member 2 is attached to the regulation portion 29.
The writing body is biased rearward by locking one end of 8. In addition, inside the center shaft 5, the regulating portion 2
Three groove portions 31 are formed in the longitudinal direction at the rear of the shaft 9. The leg portions 10 of the rear shaft 3 are slidably contacted with the groove portions 31, and the leg portions 10 are guided during assembly. .

A chuck body 5 which is a member of the front shaft 2.
Are removably fixed to the center shaft 4 by screwing. Although the chuck body 5 and the center shaft 4 may be integrally formed, the ball pen 18 and the sharp pencil 2 may be formed.
Considering the ease of exchange and molding of writing materials such as 0, it is better to use two members and fix them detachably. Further, the inside of the chuck body 5 is curved, but the inclination angle of its tangent line is set to be smaller than the inclination angle of the line connecting the tip of the writing body and the diameter portion of the writing body. This is to prevent the tip of the writing body from coming into contact with the inner wall surface of the chuck body 5 when the writing body moves. Recently, the transparent shaft has become popular, and the inner surface of the shaft is prevented from becoming dirty. . In a conventional writing implement, especially when the writing body is a ballpoint pen, the ink adheres to the inner surface of the shaft, thereby deteriorating the appearance.

Further, a slit 33 is formed in the vicinity of the writing body entrance / exit opening 32 of the chuck body 5, and the writing body entrance / exit opening 32 is opened and closed by the deformation of the slit 33. Further, a reduced diameter portion 34 is formed on the circumference in the middle of the chuck body 5, and an engagement groove portion 35 and an open groove portion 36 are formed in a longitudinal direction from a part of the reduced diameter portion 34. . On the other hand, on the inner surface of the outer cylinder 6, an engagement groove portion 35 and a protrusion 37 that engages with the opening groove portion 36 are formed or fixed by another member. The example shown in FIG. 6 is a modified example of the chuck body 5, in which a spiral engagement groove portion 38 with which the projection 37 of the outer cylinder 6 is engaged is formed in the middle portion of the chuck body 5. A recess 39 is formed in the engagement groove 38 so that the outer cylinder 5 does not easily rotate.

Next, the sharp pencil 20 will be described. The rear side of the outer shaft (outer member) 40 made of a flexible member made of resin such as polypropylene, polystyrene, polybutylene terephthalate is connected to the press-fitting portion (connecting portion) 21 of the slider 14. Further, a relay member 42 is press-fitted and connected to the tip of the outer shaft 40, and a tip member 43 is fixed to the relay member 42 by screwing or the like. Then, these, the outer shaft 40 and the relay member 4
2. Inside the tip member 43, a lead core feeding mechanism 44 is slidably arranged. The lead core feeding mechanism 44
Is a lead tank 45, a chuck body 47 fixed to the front of the lead tank 45 via a connecting member 46, a chuck ring 48 for opening and closing the chuck body 47, and a step portion for regulating the forward position of the chuck ring 48. 49,
It is composed of a chuck spring 50 or the like that constantly biases the chuck body 47 rearward. Reference numeral 51 is a lead detent member that prevents the lead from retracting when it is fed out. In this example, the outer shaft 40 and the lead tank 45 are separate members in order to ensure that the lead is prevented from sinking during writing, and the rear end of the outer shaft 40 serves as the shaft body 1 during writing. Although they are locked, the rear end of the lead tank 45 may be fixed to the slider 14 without using the outer shaft 40.

Next, the method of use will be described. From the state shown in FIG. 1, when the knock piece 24 interlocking with the sharp pencil 20 is pushed forward (downward in the figure), the pushing portion 27 of the connecting rod 23 comes into contact with the rear end of the core tank 45 of the sharp pencil 20. Press. By the pressing operation of the lead tank 45, the outer shaft 40 also moves forward. This is because the elastic force of the chuck spring 50 is set to be larger than that of the elastic member 28. Further, the outer shaft 40 advances while curving using the characteristic of the flexible member. This is because the tip member 43 of the sharp pencil 20 is guided from the eccentric position with respect to the shaft main body 1 to the retractable hole 32 of the conical chuck body 5 (see FIG. 7). Then, as the outer shaft 40 advances, the slider 14 connected to the outer shaft 40 also has the slit 8
Also, the slider 14 moves forward while being guided by the sliding groove 9, and the slider 14 is pushed into the inside of the barrel main body 1 in due course.
Sliding protrusion 15 formed on the side surface of the slider-14
The rear end engages with the stepped portion 8a at the front end of the sliding groove 8, and
It blocks the retracting action of the pencil 20 (see FIG. 8). In other words, by forming the sliding groove 8 only up to the middle portion of the slit 9, the slider 14 can also be engaged. At this time, the tip of the tip member 43 of the sharp pencil 20 is projected from the tip (withdrawal hole 32) of the shaft body 1 (chuck body 5).

Next, the outer cylinder 6 is moved rearward against the urging force of the elastic member 7 and is rotated so that the protrusion 37 of the outer cylinder 6 engages the engaging groove portion 35 of the chuck body 5 (the example of FIG. 6). In the above, it is locked in the recess 39). By this operation, the chuck body 5 is closed and tightened, and the mechanical pencil 2
The zero tip member 43 is gripped (see FIG. 7). As a result, the sharp pencil 20 is integrated with the shaft body 1, and the sinking of the lead and the deflection of the tip member 43 during writing are prevented. still,
Needless to say, even when the ball-point pen 19 is projected, the swinging of the tip is prevented.

Here, in order to feed the lead, the knock piece 24 is pushed (advanced). With the forward movement of the knock piece 24, the pressing portion 27 of the connecting rod 23 presses the rear end of the lead tank 45. By this pressing operation, the chuck body 47 moves forward against the elastic force of the chuck spring 48. Then, as the chuck body 47 advances, the lead is advanced and is fed from the tip member 43. Next, Sharp Pencil 2
When 0 is stored in the shaft main body 1, first, the engagement action between the protrusion 37 of the outer cylinder 6 and the engagement portion of the chuck body 5 is released. Specifically, when the outer cylinder 5 is rotated with respect to the chuck body 5, the outer cylinder 6 advances due to the action of the elastic member 7. By this operation, the chuck body 5 is expanded and the sharp pencil 2
The gripping action of the zero tip member 43 by the chuck body 5 is released. Then, the other sliders 12 and 13 are pressed.
When the other slider is pressed, the release protrusion 17 formed on the back surface of the other slider collides with the release protrusion 16. Due to this collision action, the slider 14 in the pressed state is pressed in the outward direction of the barrel body 1. By this pressing action, the engagement between the sliding protrusion 15 of the slider 14 and the stepped portion 8a of the sliding groove 8 is released, and the sharpening pencil 20 in the protruding state is repelled by the releasing action. It is retracted by the action of the member 28 and is immersed in the shaft body 1. In this example, the elastic force of the chuck spring 50 is set to be larger than that of the elastic member 28, but it may be set to the opposite state, that is, the elastic force of the elastic member 28 is larger than that of the chuck spring 50. Although the repulsive force may be set to be larger, when the sharp pencil is projected, the chuck spring is pushed while projecting, and the lead can be fed out at the same time. And
In such a case, the pressure input to the outer shaft 40 of the slider 14 is set to be large. Specifically, the elastic force of the elastic member 28 is set so as not to fall off.

9 and 10 show a second modification. A spiral groove 52 is formed in the middle of the chuck body 5, and
This is an example in which a spiral projection 53 that is screwed into the spiral groove is formed inside the outer cylinder 6. By rotating the outer cylinder 6 relative to the chuck body 5, the outer cylinder 6 is moved back and forth to open and close the chuck body 5. 11 and 12,
The 3rd modification is shown. This is an example in which the cross-sectional shape of the portion of the chuck body 5 that abuts the slit 33 is formed in a wedge shape (wedge portion 54), and a projection 55 that abuts or does not abut the wedge portion 54 is formed on the inner surface of the outer cylinder 6. . Outer cylinder 6 is chuck body 5
When rotated, the projection 55 presses (non-presses) the wedge portion 54 to open and close the chuck body 5. The chuck body 5 can be opened and closed only by rotating the outer cylinder 6, and the operation is simple. Reference numeral 56 denotes a circumferential groove, into which a circumferential projection 57 formed inside the outer cylinder 6 fits. The outer cylinder 6 is prevented from falling off the chuck body 5.

[0019]

According to the present invention, a plurality of writing bodies including at least one sharp pencil are provided in the shaft body, and the writing bodies are urged rearward by a repelling member. By advancing the pressing member attached to the end,
In a multi-core writing instrument adapted to project the writing body from the shaft body, a chuck body is arranged at a writing body entrance / exit of the shaft body, and an outer cylinder for opening / closing the chuck body is arranged on the shaft body. Therefore, the core does not sink when writing,
Also, since the spring force of the spring of the lead-out mechanism is not increased, it can be operated favorably, and
The holding force of the lead does not cause the lead to break. Also,
It is also possible to prevent the tip end of the cursive body from swinging.

[Brief description of the drawings]

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

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a perspective view showing a slider-peripheral part of the present invention.

FIG. 5 is a perspective view of an essential part of the present invention.

6 is a perspective view of a main part showing a modified example of FIG.

FIG. 7 is an enlarged vertical cross-sectional view of essential parts showing a state where the sharp pencil of FIG. 1 is projected.

8 is an enlarged view of a portion C in FIG. 7;

FIG. 9 is a vertical sectional view showing a second modification.

10 is a perspective view of an essential part of FIG.

FIG. 11 is a vertical sectional view showing a third modification.

FIG. 12 is a cross-sectional view in the assembled state of FIG.

[Explanation of symbols]

 1 Axis Main Body 2 Front Axis 3 Rear Axis 4 Middle Axis 5 Chuck Body 6 Outer Cylinder 7 Repellent Member 8 Slit 9 Sliding Groove 10 Leg Part 11 Clip Part 12 Slider (Pressing Member) 13 Slider- (Pressing Member) 14 Slider- (Pressing member) 15 Sliding protrusion 16 Release protrusion 17 Release protrusion 18 Ball pen (writing body) 19 Connecting portion 20 Sharp pencil (writing body) 21 Press-fitting portion 22 Knock groove 23 Connecting rod 24 Knock piece 25 Protrusion 26 Notch Part 27 Pressing part 28 Repulsive member 29 Control part 30 Through hole 31 Groove part 32 Embankment hole 33 Slit 34 Reduced diameter part 35 Engagement groove part 36 Open groove part 37 Projection 39 Recess 40 Outer shaft 42 Intermediary member 43 Tip member 44 Core feeding mechanism 45 Core tank 46 Connection member 47 Chuck body 48 Chuck ring 49 Step portion 50 Chuck spring 51 Return Stopping member 52 Spiral groove 53 Spiral protrusion 54 Wedge portion 55 Protrusion 56 Circumferential groove 57 Circular protrusion

Claims (1)

[Claims] 1. A shaft body has a plurality of writing bodies including at least one sharp pencil, and the writing bodies are biased rearward by an elastic member, but are attached to a rear end of the writing body. In a multi-core writing instrument in which the writing body is projected from the shaft body by advancing the pressing member, the chuck body is arranged at the writing body entrance / exit opening of the shaft body, and the chuck body is opened / closed. A multi-core writing instrument, wherein an outer cylinder to be performed is arranged on the shaft body.