JPH08310185A - Multi-lead writing instrument - Google Patents

Abstract

PURPOSE: To prevent the immersion of a lead in the case of writing by allowing a knock member for operating the lead feeding mechanism of a mechanical pencil to protrude from the side of a barrel body in a writing instrument having a plurality of writing units including at least one pencil. CONSTITUTION: When a slider 11 coupled to a mechanical pencil 16 is pressed forward, the slider 11 moves forward together with a pencil 16 while being guided by a slit 6 and a sliding groove 7. Then, the intermediate part 25a of the leading member 25 of the pencil 16 is engaged with the end inner surface 4a of a leading member 4, and the end of the member 25 protrudes from the end of a barrel body 1. Simultaneously, slider 11 is intruded to the inside of the body 1, then the rear end of the sliding protrusion formed at the side of the slider 11 is engaged with the front end of the sliding groove 7 to prevent the backward movement of the pencil 16. In order to feed a lead, a knock member 33 is pressed, the lead is advanced upon advancing of a chuck to feed the lead from the member 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a plurality of writing bodies including at least one sharp pencil in a shaft body, and the writing bodies are biased rearward by an elastic member. The present invention relates to a multi-core writing instrument in which a pressing member attached to the rear end of the writing instrument is moved forward or rotated to project the writing body from the shaft body.

[0002]

2. Description of the Related Art As a multi-core writing instrument in which one of the writing materials is a sharp pencil, Japanese Utility Model Publication No. 56-35354,
Japanese Utility Model Publication No. 56-16312 is known. And, in the former utility model 56-35354 gazette, the utility model registration claim includes "a sharp pencil mechanism 4 and a ball pen mechanism 6 are slidably opposed to each other in the barrel 1. Therefore, the shaft cylinder 1 has the longitudinal guide grooves 2 and 3 formed in the neck portion so as to face each other, and at the end of the neck portion of the shaft cylinder 1, two push legs 801 are provided.
802 is 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 ring 402 with which the chuck 401 is fitted or withdrawn. The chuck 401 is made up of an ejector 404 that reciprocates elastically, and the fingertip 5 is attached to the base end thereof. The ball-pen mechanism 6 is provided with a rolling ball 602 at the tip of the ink tube 601. The acupressure element 7 is attached to the base end, and the acupressure elements 5 and 7 are arranged so as to face each other on the presser 8 side. Protrusions 501 and 701 for projecting and holding both mechanisms 4 and 6 from the barrel 1 are provided in a protruding manner, and the protrusions 501 and 701 and the push legs 801 and 802 are provided in the middle of the facing surfaces of the pushers 5 and 7.
Projections 502 and 702 for releasing the engagement with
The opposite sides of the acupressure elements 5 and 7 are opposed to the longitudinal guide grooves 2 and 3 so that both the mechanisms 4 and 6 are penetrated through the inner tool 9 provided on the barrel 1 and the inner tool 9 and the finger press 5 are inserted. , 7 and ammunition 1
A writing instrument characterized in that 0 and 11 are respectively interposed so that the both mechanisms 4 and 6 are always drawn into the barrel 1. ], And as an explanation for operating the sharp pencil mechanism 4, the detailed explanation is as follows.
"A pusher 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 the rear shaft 102 of the barrel 1. The pusher 801 has a U-shaped cross-section, and two push legs 801 and 802 are provided in a protruding manner.
In both of 802, the bullet 404 of the sharp pencil mechanism 4, the chuck 401, the tightening ring 402 and the like are finely slidably reciprocally slid through the acupressure element 5, and the writing core a is pierced similarly to the known sharp pencil. It is made to project from 403, and the projecting length is adjusted. ] (Publication No. 3
Column lines 16-26).

Further, the latter utility model registration claim of Japanese Utility Model Publication No. 56-16312 discloses a lower shaft case 1 having a front end opening 29; two guides extending in the axial direction and diametrically opposed to each other. A guide sleeve 9 having grooves 10, 10 'and fixed to the rear end opening of the lower shaft case 1;
A writing tip is directed into the tip opening 29 of the lower shaft case 1 and is located in the lower shaft case and each is guided to its rear end by a corresponding one of the guide grooves 10, 10 '. Knock-type shear having sliders 7 and 7 '
Puppencil element 3 and ball-pen element 3 ': The guide sleeve 9 is rotatable around the guide sleeve 9 to the left or right, and the guide sleeve 9 is movable in a certain axial section. The slider encloses the slider so as to alternately advance the writing elements 3 and 3'to the writing position or retract to the storage position every 180 ° rotation.
7 and 7 ', a slanting slanting surface 13 for engaging under spring pressure, a curved casing 8 having a notch engaging portion 14 and a flat portion 15 formed on the lower end surface; and the guide sleeve 9 at the top thereof. A cam head 18 is provided, a cam 18 is provided on the outer peripheral surface of the outer shaft, and a fan-shaped stopper 12 engaging with the cam 18 is provided at the upper end of the curved casing 8 so that the cam 18 and the fan-shaped stopper are formed. 12 means that the pencil element 3 is the lower shaft case.
When protruding from the tip end opening portion 29 of the sleeve 1, the mutual engagement is disengaged, and the curved casing 8 can be reciprocated in the axial direction with respect to the guide sleeve 9, and this transition is caused by the cutout engagement. It is transmitted to the pencil element 3 in the writing position through the slider 7 that engages with the joint portion, and the lead core is fed out by a knocking operation, while the ball pen element 3'is moved to the lower shaft case. A writing instrument characterized in that, when projecting from the tip end opening portion 29 of the sheet 1, they are engaged with each other to lock the transition of the curved casing 8 in the axial direction. It is described.

[0004]

However, in any of the above-mentioned prior arts, the member (the acupressure member 5 in the former case and the slider 7 in the latter case) that operates the mechanism for feeding out the core of the sharp pencil is not -It also serves as an engagement member that prevents the pen pencil from entering when protruding from the shaft body. Therefore, in the writing instrument having such a configuration, almost all the load applied to the core during writing is applied to the engaging portion. Then, when a load due to writing is applied to the engaging portion, the state is the same as when the lead-out 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 a shear is provided in the shaft body.
Having a plurality of cursives including at least one pen pencil,
The cursive body is biased rearward by an elastic member, but a pressing member attached to the rear end of the cursive body is advanced or rotated to project the cursive body from the shaft body. In the writing instrument, the sharp pencil is
While having an outer member and a lead core feeding mechanism arranged inside the outer member, the outer member is connected to the pressing member, and a knock member for operating the lead core feeding mechanism is projected from the side surface of the shaft body. The main point is that they are placed in this state.

[0006]

The outer shaft of the sharp pencil engages with the shaft body, and the lead core feeding mechanism is operated by a knock member that operates independently of the outer shaft.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example will be described with reference to FIGS. A multi-core writing instrument in which a sharp pencil and a ball pen are slidably arranged. Instead of a combination of one type of sharp pencil and a ball pen, a plurality of types of core pencils may be used, or a combination of a plurality of types of color pencils and a sharp pencil. May be. Reference numeral 1 is a shaft main body, and the shaft main body 1 is composed of a front shaft 2 and a rear shaft 3. Further, in the present example, the front shaft 2 is configured by the screwing structure of the front member 4 and the center shaft 5, but may be integrally formed.

On the rear shaft 3, two slits 6 are formed in the longitudinal direction thereof. In this example, two slits 6 are formed, but this is because there are two writing pencils, a sharp pencil and a ball pen. The number of slits formed depends on the number of writing bodies. It will change. Further, the slit 6 is formed up to one end of the rear shaft 3, and sliding grooves 7 are formed on both sides of the slit 6. However, the sliding groove 7 is not formed over the entire length of both sides of the slit 6,
Only the middle part is formed. Legs 8 are formed in front of the rear shaft 3. The leg portion 8 is formed by forming the slit 6. Therefore, the number of legs 8 also changes depending on the number of cursive materials. Also, the lengths of the legs 8 are not the same but different. Specifically, FIG.
The upper leg is formed to be shorter than the two middle and lower legs 8. As will be described later, this is intended to facilitate the assembling of the rear shaft 3 to the center shaft 5. Reference numeral 9 is
It is a clip portion formed on the side surface of the rear shaft 3.

In the slit 6 of the rear shaft 3, a slider (moving member) 11 having an uneven portion 10 with which a finger abuts is formed.
Are slidably arranged. Sliding protrusions 12 are formed on both sides of the slider 11 in the longitudinal direction and slidably engage with a sliding groove 7 formed in the slit 6. Two releasing projections 13 and 14 are formed on the back surface of the slider 11 at intervals, and a spherical connecting portion 1 for connecting a cursive body is formed at the front end portion of the slider 11.
5 is formed. A writing body such as a sharp pencil 16 and a ball pen 17 is connected to the connecting portion 15 by press fitting or the like. Reference numeral 18 is a sharp
It is an elastic member such as a coil spring that biases the slider 16 connected to the pencil 16 and the ball pen 17 and the cursive body thereof backward.

A restricting portion 19 is formed at an intermediate portion of the center shaft 5 which is one member of the front shaft 2, and the restricting portion 19 is formed with two through holes 19a into which the cursive body is loosely inserted. ing. By locking one end of the elastic member 18 to the restricting portion 19, the cursive body is biased rearward. Further, inside the center shaft 5, behind the restricting portion 19, three groove portions 20 are formed in the longitudinal direction.
The leg portion 8 of the rear shaft 3 is slidably contacted with 0, and the leg portion 8 is guided during assembly.

The front member 4, which is one member of the front shaft 2, is detachably fixed to the center shaft 5 by screwing. The tip member 4 and the center shaft 5 may be integrally formed, but in consideration of the ease of replacement and molding of the writing body such as the sharp pencil 16 and the ball pen 17, it is formed as two members.
It is better to fix it detachably. The inside of the tip member 4 is curved, but the inclination angle of the tangent line thereof is set 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 contacting the inner wall surface of the tip member 4 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 instrument, especially when the writing body is a ball-point pen, the ink adheres to the inner surface of the shaft, which makes it unattractive.

Next, the sharp pencil 16 will be described. Outer shaft (outer member) 2 made of metal pipe, etc.
A joint 22 is press-fitted to the rear of the connector 1, and the joint 22 is connected to the connecting portion 15 of the slider-11. Further, a window hole 23 into which a knock member described later is loosely fitted is formed on the side surface of the intermediate portion of the outer shaft 21. On the other hand, a tip member 25 is fixed to the tip of the outer shaft 21 via a relay member 24 by press fitting or the like. A lead core feeding mechanism 26 is slidably arranged inside the outer shaft 21, the relay member 24, and the tip member 25. The lead core feeding mechanism 26 includes a lead tank 27, a chuck body 29 fixed to the front of the lead tank 27 via a connecting member 28, a chuck ring 30 for opening and closing the chuck body 29, and the chuck body. It is composed of a chuck spring 31 for constantly urging 29 toward the rear. Reference numeral 32 denotes a lead detent member that prevents the lead from retracting when it is fed out. In addition, the lead-out mechanism 2
6, the leg portion 34 of the knock member 33 for advancing the lead tank 27 is engaged with the rear end of the lead tank 27.
The leg portion 34 may be fixed to the intermediate portion of the lead tank 27. Then, the knock member 33 has the window hole 2 of the outer shaft 21.
3 and the window hole 5 formed on the side surface of the intermediate portion of the center shaft 5.
It projects from the side surface of the center shaft 5 (the side surface of the intermediate portion of the shaft body 1) through a.

Next, the operation will be described. When the slider 11 connected to the sharp pencil 16 is pressed forward (downward in the figure), the slider 11 advances along with the sharp pencil 16 while being guided by the slit 6 and the sliding groove 7, -The intermediate portion 25a of the tip member 25 of the pencil 16 engages with the tip inner surface 4a of the tip member 4, and the tip of the tip member 25 projects from the tip of the shaft body 1. At the same time, the slider 11 is pushed into the inside of the barrel body 1, and then the rear end of the sliding protrusion 12 formed on the side surface of the slider 11 engages with the front end 7a of the sliding groove 7. In this case, the retracting action of the sharp pencil 16 is prevented. That is, by forming the sliding groove 7 only up to the middle portion of the slit 11, the slider 11 is also engaged. Here, in order to pay out the lead, the knock member 33 is pressed (advanced). This knock member 3
By the forward movement of 3, the lead tank 27 and the chuck body 29 move forward against the elastic force of the chuck spring 31. Then, the lead is advanced from the tip member 25 as the chuck body 29 is advanced, and the lead is advanced.

Next, when the sharp pencil 16 is to be housed in the shaft body 1, another slider 11 is pressed.
When another slider-11 is pressed, the other sliders-1
The release projections 13 and 14 formed on the back surface of the vehicle 1 collide with each other. Due to this collision action, the slider 11 in the pressed state is pressed outward of the barrel body 1. By this pressing action, the engagement between the sliding protrusion of the slider 11 and the sliding groove 7 is released, and the sharp pencil 16 in the protruding state by the releasing action is operated by the elastic member 18. It retreats and sinks into the shaft body 1.

Next, a modification of the sharp pencil will be described. In the example shown in FIG. 7, the lead core feeding mechanism 26 is slidably arranged and replaced with an outer shaft 21 that is connected to the slider 11 via a joint 22, and a semi-arcuate connecting plate 3 is used.
5 is set. Further, in the example shown in FIG. 8, a needle-shaped member 36 such as a piano wire is used instead of the outer shaft 21. These modifications have the effects of eliminating the step of forming the window portion 23, improving productivity, and increasing the exposed amount of the lead tank 27, so that the knock member 33 can be easily attached. Furthermore, the example shown in FIG.
The middle portion of the core is cut out in a semi-circular shape, and the core tank 27
Notch the rear part of, and align these notches,
It has a cylindrical shape. That is, the outer shaft 21 and the lead tank 27 form a lead tank portion.
With such a configuration, the sharp pencil can be made thin, and thus the shaft body 1 can also be made thin. The multi-core writing instrument is an improvement plan that takes into consideration the problem that the writing angle becomes thick and thick.

Next, modified examples of the knocking method are shown in FIGS.
1 will be described. A long hole 37 larger than that in the previous example is formed in the middle portion of the outer shaft 21, and a knock portion 38 having an inclined surface 38a formed on the side surface of the middle portion of the lead tank 27 is fixed or integrated with the lead tank 27. It was formed in. A knock member 39, which moves in the radial direction and engages with the inclined surface 38a of the knock portion 38, is rotatably attached to the shaft body 1 with the rear end 39a as a fulcrum in this example. It is a so-called side knock type sharp pencil.

In the above example, a cushioning member 40 such as a rubber member is attached to the rear of the outer shaft 21 as shown in FIG. 12, and the sharpening pencil 16 is housed in the shaft body 1 at the regulating portion 19. You may make it soften the impact which abuts. The excessive holding force of the chuck body on the core due to the impact and the breakage of the core due to the excessive holding force are prevented. Further, a cushioning member may be attached to the rear end of the slider 11 so that when the cushioning member is housed, the cushioning member contacts the inside of the rear end of the rear shaft 3. In the above example, the slider 11 is moved in the axial direction with respect to the shaft body 1 so that the cursive body such as the sharp pencil or the ball pen is projected. Takami Kosho 5
As shown in Japanese Patent Laid-Open No. 6-16312, a writing cam may be projected by using a rotating cam mechanism.

[0018]

The present invention has a plurality of writing bodies including at least one sharp pencil in the shaft body, and the writing bodies are biased rearward by the elastic member, but In a multi-core writing instrument in which the pressing member attached to the end is moved forward or rotated to project the writing body from the shaft body, the sharp pencil is arranged inside the outer member and the outer member. While having a lead core feeding mechanism, the outer member is connected to the pressing member, and the knock member for operating the lead core feeding mechanism is arranged in a state of protruding from the side surface of the shaft body. Since the core does not sink and the spring force of the spring of the core feeding mechanism is not increased, the core can be operated well, and the core is not broken by the holding force.

[Brief description of drawings]

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

FIG. 2 is a sectional view taken along the line AA when the slider corresponding to FIG. 1 is retracted.

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

FIG. 4 is an enlarged view of part C in FIG.

FIG. 5 is an assembled perspective view showing a sharp pencil of the present invention.

FIG. 6 is a vertical sectional view corresponding to FIG.

FIG. 7 is a perspective view showing a modified example corresponding to FIG.

FIG. 8 is a perspective view showing another modified example corresponding to FIG.

FIG. 9 is a perspective view showing still another modified example corresponding to FIG.

FIG. 10 is a longitudinal sectional view of a main part showing another example of the knocking method in the present invention.

FIG. 11 is an assembled perspective view showing a sharp pencil corresponding to FIG.

FIG. 12 is a longitudinal sectional view of a main part showing a modified example of the invention.

[Explanation of symbols]

 1 Axis Main Body 2 Front Axis 3 Rear Axis 4 Tip Member 4a Tip Inner Surface 5 Middle Axis 6 Slit 7 Sliding Groove 7a Front End 8 Legs 9 Clip Part 10 Concavo-convex Part 11 Slider (Pressing Member) 12 Sliding Protrusion 13 Release Protrusion 14 Release protrusion 15 Connection portion 16 Sharp pencil (writing body) 17 Ball pen (writing body) 18 Repellent member 19 Restricting portion 19a Through hole 20 Groove 21 Outer shaft (outer member) 22 Joint 23 Window hole 24 Intermediate joint member 25 Tip Member 25a Step portion 26 Lead feeding mechanism 27 Lead tank 28 Connecting member 29 Chuck body 30 Chuck ring 31 Chuck spring 32 Detent member 33 Knock member 34 Leg portion 35 Connecting plate 36 Needle member 37 Long hole 38 Knock portion 38a Inclined surface 39 Knock member 39a Rear end 40 Buffer member

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 pressing member being pushed forward or rotated to project the writing body from the shaft body, the sharp pencil is an outer member and a lead lead-out mechanism arranged inside the outer member. On the other hand, the multi-core writing instrument is characterized in that the outer member is connected to the pressing member, and a knock member for operating the lead core feeding mechanism is arranged so as to project from the side surface of the shaft body.