JP3384187B2 - Multi-core writing instrument - Google Patents

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 in a shaft body, and the writing bodies are biased rearward by an elastic member, but are attached to a rear end of the writing body. The present invention relates to a multi-core writing instrument in which the writing body is projected from the shaft body by advancing-and engaging the slider with the shaft body.

[0002]

2. Description of the Related Art A multi-core writing instrument as disclosed in Japanese Utility Model Publication No. 55-85882 is generally known. A sharp pencil and a ball pen are slidably arranged in the shaft body, and the knock pencil pieces attached to the upper parts of the shaft pencil are pressed to push the sharp pencil or the ball pen from the shaft body. It is to project.

[0003]

However, the above-mentioned conventional technique has a problem in the assembling method. Various assembly methods are possible. As one of them, pinch the knock piece with a hand, insert the knock piece into the notch opening of the upper shaft body, and while maintaining the state, hold the sharp pencil (or ball pen) of the upper shaft body. This is a method of inserting from the front and connecting the knock piece and the sharp pencil inside the upper shaft body. However, if it is a transparent shaft, it is still not possible to confirm the position and movement of the joint between the knock piece and the sharp pencil inside the shaft in the colored shaft. Has never been so easy.

There is also a method in which the knock piece and the sharp pencil are connected in advance and the knock piece is inserted from the front of the upper shaft toward the cutout opening. However, again, it was not easy to insert the inside of the long upper shaft body so that the knock piece was located at the notch opening because the knock piece was tilted around the middle part. .

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a plurality of writing bodies in a shaft body, and the writing bodies are attached to the rear by an elastic member. A multi-core structure which is urged to move the slider attached to the rear end of the writing body forward and engage the slider with the shaft body so that the writing body projects from the shaft body. In the writing instrument, the shaft body is composed of a front shaft and a rear shaft, is engaged and fixed to each other, and a slit on which the slider slides is formed on the rear shaft up to an end on the front shaft side. The gist of the present invention is that the slit has a sliding groove on which the slider slides, and the slider has a sliding protrusion that slidably engages with the sliding groove.

[0006]

The slider and the cursive body can be combined and inserted into the rear shaft, and after the insertion, the slider does not fall off the rear shaft in the radial direction.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example will be described with reference to FIGS. A multi-core writing instrument in which ball pens of three colors are slidably arranged. Not only a ball pen but also a sharp pencil may be used. 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.

The rear shaft 3 is formed with three slits 6 in the longitudinal direction thereof. In this example, three slits 6 are formed, but this is because the number of ball pens that are cursive bodies is three, and the number of slits also changes depending on the number of cursive bodies. is there. 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 on both sides of the slit 6, but is formed only up to the intermediate portion. 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, the left leg is formed to be shorter than the two right legs 8 in FIG. 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 a clip portion formed on the side surface of the rear shaft 3, and a hole 10 is formed in the base portion of the clip portion 9. The hole 10 is a hole through which a string or a wedge is passed.

A slider 6 is provided in the slit 6 of the rear shaft 3.
11 is slidably arranged. This slider-11
Sliding protrusions 12 are formed on both sides in the longitudinal direction of the slidable portion, and slidably engage with sliding grooves 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 15 for connecting a cursive body is formed on the front end portion of the slider 11. . A writing body 16 such as a ball pen or a sharp pencil is connected to the connecting portion 15. Reference numeral 17 is an elastic member such as a coil spring that biases the writing body 16 and the slider 11 connected to the writing body 16 backward.

A restricting portion 18 is formed at an intermediate portion of the center shaft 5 which is one member of the front shaft 2, and the restricting portion 18 has three through holes 19 through which the writing body 16 is loosely inserted. Has been done. The curving member 16 is biased rearward by engaging one end of the elastic member 17 with the restricting portion 18. Further, three groove portions 20 are formed in the longitudinal direction inside the center shaft 5 and behind the regulating portion 18. The leg portions 8 of the rear shaft 3 are slidably contacted with the groove portions 20, and the leg portions are assembled at the time of assembly. 8 will be guided. Engagement holes 21 are formed between the three groove portions 20, respectively. When the rear shaft 3 is assembled to the center shaft 5, the engaging hole 2
The engaging protrusion 3a of the rear shaft 3 is engaged with the shaft 1. Further, the positions where the engaging holes 21 and the engaging protrusions 3a are formed in the longitudinal direction of the barrel main body 1 are different. Specifically, the engagement hole and the engagement protrusion on the right side in FIG. 6 are formed in front of the other engagement holes and the engagement protrusion (on the side of the clip portion 9). This is because the engaging hole and the engaging protrusion on the side of the clip portion 9 are not visible.
The other engaging holes and engaging protrusions are formed near the ends of the legs to prevent the engagement relationship from dropping due to twisting.

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 16, it is preferable to use two members and detachably fix them. Also, the tip member 4
The inside of is curved, but the inclination angle of its tangent line is set smaller than the inclination angle of the line connecting the tip of the writing body 16 and the diameter portion of the writing body 16. this is,
When the cursive body 16 moves, the tip of the cursive body 16 moves toward the tip member 4.
The inner wall surface of the is prevented from contacting (see FIG. 5). Recently, the transparent shaft has become popular, and the inner surface of the shaft is prevented from becoming dirty. Especially in writing instruments like the past,
When the cursive body 16 is a ball-point pen, the ink adheres to the inner surface of the shaft, resulting in poor appearance.

Next, the operation will be described. When a specific slider 11 is pressed forward (downward in the figure), the slider
11 is guided by the slit 6 and the sliding groove 7,
It moves forward with the writing body 16, and the tip of the writing body 16 is the shaft body 1
Protruding from the tip of. At the same time, the slider-11 is pushed into the inside of the barrel body 1, and then the slider-11
The rear end of the sliding protrusion 12 formed on the side surface of the writing element 16 engages with the front end portion of the sliding groove 7 to prevent the retracting action of the writing body 16. That is, by forming the sliding groove 7 only up to the middle portion of the slit 6 , the slider 11 is also engaged.

Next, when the cursive body 16 is to be stored in the shaft body 1, another slider 11 is pressed. When the other slider 11 is pressed, the release protrusions 13 and 14 formed on the back surfaces of the sliders 11 collide with each other. This collision action causes the slider-1 to be pressed.
1 is pushed outward of the barrel main 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 writing body 16 in a state of being projected by the releasing action is retracted by the action of the elastic member 17. Immerse into the shaft body 1.

Next, the assembling method will be described. First, a writing body 16 such as a ball pen is connected to the connecting portion 15 of the slider 11. Next, the sliding protrusion 12 of the slider 11 is aligned with the sliding groove 7 of the rear shaft 3 and is pushed and inserted. Of course, the slider 11 is also loosely inserted in the slit 6. Next, with the three sliders 11 fitted into the rear shaft 3, the repellent member 17 is loosely inserted into each writing body 16. The rear axle is now unitized.

Next, the unitized rear shaft is connected to the center shaft 5. At this time, first, the longer leg portion 8 of the rear shaft 3 is aligned with the groove portion 20 of the center shaft 5 and is press-fitted.
Here, the positioning of the center shaft 5 with respect to the rear shaft 3 is omitted. When the rear shaft 3 is further pushed into the center shaft 5, the shorter leg 8 is fitted into the groove 20 and the center shaft 5 is completely positioned with respect to the rear shaft 3. When pushed further, the engagement protrusion 3a engages with the engagement hole 21, and the rear shaft 3 and the center shaft 5 are fixed. By this assembling operation, the elastic member 17 is prevented from moving forward by the restricting portion 18 of the center shaft 5, and biases the writing body 16 backward. Finally, the tip member 4 is screwed onto the center shaft 5.

Next, a method of exchanging cursive materials will be described with reference to FIG. When the cursive body is a ball-point pen, it is when the ink has run out, and when it is a sharp pencil, it is the time when the core is lost and a new core is refilled. First, the tip member 4 is removed from the center shaft 5. Next, hold the exposed portion of the cursive body 16 to be replaced with a finger or the like, and pull out from the connecting portion 15 of the slider-11. At this time, the slider 11 is prevented from coming off from the rear shaft 3 in a state where it is in contact with the rear end of the center shaft 5 and is loosely inserted in the slit 6, and the repulsion member 17 is separated from the center shaft 5 by the restriction portion 18. Is prevented from falling off. Of course, since the restricting portion 18 is formed integrally with the center shaft 5, it does not fall off the center shaft 5. Next, a new cursive body is pressed into the slider 11 from the front of the center shaft 5 through the through hole 19. Finally, the tip member 4 is screwed onto the center shaft 5. An engagement prevention protrusion 22 is formed below the release protrusion 14 on the back surface of the slider 11. This prevents the slider from being locked at the end of the sliding groove 7 (so-called the writing body protruding state) when the writing body is replaced by the slider moving forward and retracting in the radial direction. This is because. The engagement preventing operation is performed by bringing the releasing protrusion 13 of the forwardly moving slider 11 into contact with the engaging preventing protrusion 22 of the slider 11 in the retracted state (see FIG. 8). . When the cursive body is replaced, the elastic member is extended so that the cursive body can be easily replaced. As shown in FIG. 9, the engagement preventing protrusion 2
The inclined surface portion 22a may be formed on the front end surface of the second slider 2 so that the slider 11 in the forward movement can be easily flipped to the outside of the shaft body.

FIG. 10 shows a modification of the slider. The shape of the front surface of the slider is made larger than the shape of the slit to facilitate operability. Even in the slider having such a shape, since the slit is formed up to the end portion of the rear shaft, the slider or the slider in which the writing body is connected can be easily assembled to the rear shaft. It is possible.

[0018]

The present invention has a plurality of writing bodies in the shaft body, and the writing bodies are biased rearward by the elastic member, but are attached to the rear end of the writing body. In a multi-core writing instrument in which the writing body is projected from the shaft body by moving the slider forward and engaging the slider with the shaft body, the shaft body is composed of a front shaft and a rear shaft, and A slit for sliding the slider is formed on the rear shaft to the end portion on the front shaft side , and a sliding groove for sliding the slider is formed on the slit. Since the slider is formed with the sliding protrusions that slidably engage with the moving groove, the slider and the writing body can be easily assembled to the rear shaft.

[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 line AA of FIG.

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

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

FIG. 5 is an enlarged vertical sectional view of an essential part showing the operation.

FIG. 6 is a longitudinal sectional view of an essential part showing an assembling method.

FIG. 7 is a vertical cross-sectional view of a main part showing a method of replacing a cursive body.

FIG. 8 is an enlarged view of part D in FIG.

9 is an enlarged view showing a modified example of the slider corresponding to FIG.

10 is a cross-sectional view showing a modified example of the slider corresponding to FIG.

[Explanation of symbols]

1 Shaft main body 2 Front shaft 3 Rear shaft 3a Engagement protrusion 4 Front member 5 Middle shaft 6 Slit 7 Sliding groove 8 Leg portion 9 Clip portion 10 Hole 11 Slider-12 Sliding protrusion 13 Release protrusion 14 Release protrusion 15 Connection portion 16 Writing Body 17 Repulsion member 18 Restriction part 19 Through hole 20 Groove part 21 Engagement hole 22 Engagement prevention projection 22a Sloping surface part

Claims (2)

(57) [Claims] 1. A shaft body has a plurality of writing bodies, which are biased rearward by an elastic member, and a slider attached to the rear end of the writing body is moved forward. In a multi-core writing instrument in which the writing body is projected from the shaft body by engaging the slider with the shaft body, the shaft body is composed of a front shaft and a rear shaft, and is fixedly engaged with each other. On the rear shaft, a slit on which the slider slides is formed up to the end on the front shaft side , and a sliding groove on which the slider slides is formed on the slit, while sliding on the sliding groove. A multi-core writing instrument, wherein a sliding protrusion that is movably engaged is formed on the slider. 2. A rear shaft unit is constituted by engaging a sliding protrusion of a slider on which each cursive body is mounted with a sliding groove formed in a slit of the rear shaft, and then, the rear shaft unit is formed. The multi-core writing instrument according to claim 1, wherein the multi-core writing instrument is connected to the front shaft.