Multi-color and multi-

Abstract

To provide a multi-color / multi-functional writing utensil which can improve a writing feeling by projecting a refill in parallel with the axis of a cylindrical case in a writing state of the refill in the cylindrical case.SOLUTION: A multi-color and multi-function writing instrument having a plurality of refills in a cylindrical case, wherein the whole of the refill is positioned on an inner peripheral surface side of the cylindrical case in a stored state in which a tip of the refill is stored in the cylindrical case, and is positioned on an axial center of the cylindrical case by rotation in a writing state in which the tip of the refill protrudes from the cylindrical case.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a multi-color writing instrument that can be used by selectively selecting one ballpoint pen refill from a plurality of color ballpoint pen refills, and a multi-function writing instrument that can be used by selectively selecting one refill from a plurality of types of refills, such as a ballpoint pen or a felt-tip pen. [Background technology]

[0002] In conventional multi-color writing instruments and multi-function writing instruments (hereinafter collectively referred to as "multi-color / multi-function writing instruments"), refills are stored in a cylindrical case and are evenly spaced within the cylindrical case (see Patent Document 1 (Figs. 6-8) and Patent Document 2 (Fig. 5)). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-25616 [Patent Document 2] Japanese Patent Application Publication No. 2018-47615 [Patent Document 3] Japanese Patent Application Laid-Open No. 2007-30241 Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional multi-color / multi-function writing instruments, the refills are evenly arranged inside the cylindrical case, so when the refills are protruding from the tip opening on the axis of the cylindrical case, the tip of the refill protrudes at an angle relative to the axis of the cylindrical case (see Patent Document 3 (Figure 2)). This results in a poor writing feel.

[0005] Therefore, an object of the present invention is to provide a multi-color, multi-function writing instrument that can improve the writing feel by allowing the refill to protrude parallel to the axis of the cylindrical case when in writing with the refill inside the cylindrical case. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention has the following configuration. A multi-color, multi-function writing instrument having a plurality of refills in a cylindrical case, A multi-color, multi-function writing instrument characterized in that the entire refill is located on the inner surface of the cylindrical case when in a stored state in which the tip of the refill is stored in the cylindrical case, and when in a writing state in which the tip of the refill protrudes from the cylindrical case, it rotates to be located on the axis of the cylindrical case. [Effects of the Invention]

[0007] The multi-color, multi-function writing instrument of the present invention is configured so that when the refill is protruded from the cylindrical case, the refill moves onto the central axis of the cylindrical case, allowing the refill to be used to protrude onto the central axis of the cylindrical case, improving the writing feel. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a vertical cross-sectional view of a multicolor writing instrument 1 according to an embodiment of the present invention. [Figure 2] 1 is a cross-sectional view of the vicinity of a central case 22 of a multicolor writing instrument 1 according to an embodiment of the present invention. [Figure 3] 2 is a diagram showing the movement of a first slider 31 of a multicolor writing instrument 1 according to an embodiment of the present invention. FIG. [Figure 4] 10A and 10B are diagrams showing another example of movement of the first slider 31 of the multicolor writing instrument 1 according to the embodiment of the present invention. [Figure 5] 2 is a diagram showing the main part of the rear case 23 of the multicolor writing instrument 1 according to the embodiment of the present invention. FIG. [Figure 6] 1 is a diagram of a first slider 31 of a multicolor writing instrument 1 according to an embodiment of the present invention. [Figure 7] 1 is a diagram showing the relationship between a central case 22, a first slider 31, and a first coil spring 32 of a multicolor writing instrument 1 according to an embodiment of the present invention before assembly. [Figure 8] 1 is a cross-sectional view of a multicolor writing instrument 1 according to an embodiment of the present invention. [Figure 9] FIG. 10 is a cross-sectional view of a modified multi-color writing instrument 1' according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Embodiment] A multicolor writing instrument 1 according to an embodiment of the present invention will now be described with reference to the drawings. In the following description, the same reference numerals in different drawings indicate parts with the same functions, and duplicated descriptions in each drawing will be omitted as appropriate.

[0010] [Overall configuration] Figure 1 is a vertical cross-sectional view of a multi-color writing instrument 1 in this embodiment, showing the first ballpoint pen refill 3 in (a) a stored state and (b) a writing state, respectively, and the upper figures in each figure show the positional relationship between the first slider 31 and the cylindrical case 2 as viewed from above. The multicolor writing instrument 1 includes a cylindrical case 2, a first ballpoint pen refill 3, a second ballpoint pen refill 4, a third ballpoint pen refill 5, a clip 6, and the like. The cylindrical case 2 is divided into three members in the longitudinal direction: a front case 21, a center case 22, and a rear case 23. The front case 21 and the center case 22 are detachably joined by screws. The rear case 23 houses the rear ends of the first ballpoint pen refill 3, the second ballpoint pen refill 4, and the third ballpoint pen refill 5, as well as the first slider 31, the second slider 41, and the third slider 51, and is provided with a clip 6 on its outer periphery. In this embodiment, a binder clip is used as the clip 6, but this is not limiting, and a clip molded integrally with the rear case 23 may also be used. Hereinafter, the long axis direction of the cylindrical case 2 will be simply referred to as the "axial direction," the center of the long axis will be simply referred to as the "axial center," the direction of rotation around the center will be simply referred to as the circumferential direction, and the direction perpendicular to the center will be simply referred to as the radial direction. Also, in the axial direction, the side from which the refill emerges and retracts will be referred to as the front or end, and the opposite side will be referred to as the rear. Furthermore, a cross section perpendicular to the axis of the front case 21, the center case 22, and the rear case 23 will be simply referred to as a "cross section." The cylindrical case 2 may be formed of two integral members or four or more separate members. As a means for joining and separating the multiple members, any other engaging means, fitting means, etc. may be used in addition to screws.

[0011] A first ballpoint pen refill 3, a second ballpoint pen refill 4, and a third ballpoint pen refill 5 are housed in the cylindrical case 2 so as to be replaceable. The front case 21 houses the tip sides of the first ballpoint pen refill 3, the second ballpoint pen refill 4, and the third ballpoint pen refill 5. A tip opening 211 is formed at the tip of the front case 21 to allow one of the first ballpoint pen refill 3, the second ballpoint pen refill 4, and the third ballpoint pen refill 5 to protrude and retract.

[0012] FIG. 2 is a cross-sectional view of the vicinity of the central case 22 of the multicolor writing instrument 1 according to the embodiment of the present invention, with the left side being a vertical cross-sectional view and the right side being a horizontal cross-sectional view of the respective portions. Central case 22 houses the axial center portions of first ballpoint pen refill 3, second ballpoint pen refill 4, and third ballpoint pen refill 5. Central case 22 is formed with penetrating support portion 221 having refill penetrating portion 221a that penetrates first ballpoint pen refill 3, second ballpoint pen refill 4, and third ballpoint pen refill 5, and first coil spring support shaft penetrating portion 221b, second coil spring support shaft penetrating portion 221c, and third coil spring support shaft penetrating portion 221d that penetrate first coil spring support shaft 312, second coil spring support shaft 412, and third coil spring support shaft 512 of first slider 31, second slider 41, and third slider 51, respectively, which will be described later.

[0013] Figure 3 is a diagram showing the movement of the first slider 31 of the multi-color writing instrument 1 of an embodiment of the present invention, where (a) is a diagram showing the stored state of the first ballpoint pen refill 3 and (b) is a diagram showing the writing state, and the upper diagrams of each figure show the positional relationship between the first slider 31 and the cylindrical case 2 as viewed from above. Figure 4 is a diagram showing an example of the state of the first slider 31 of the multi-color writing instrument 1 of an embodiment of the invention in the middle of its movement, and the upper diagram shows the positional relationship between the first slider 31 and the cylindrical case 2 as viewed from above. FIG. 5 is a diagram showing the main part of the rear case 23 of the multicolor writing instrument 1 according to the embodiment of the present invention. The rear case 23 is formed with rail portions 231 and slit portions 232 that guide the sliding movement of the first slider 31, the second slider 41, and the third slider 51. An inclined surface 231a and an engagement portion 231b are formed on the tip side of the rail portion 231. (In FIG. 5, the rail portions 231 and the slit portions 232 that guide the second slider 41 and the third slider 51 are omitted.) The rear end side of slit portion 232 is formed narrow so that first operating portion 311b, second operating portion 411b, and third operating portion 511b can only slide in the axial direction, and the front end side is formed wide so that first operating portion 311b, second operating portion 411b, and third operating portion 511b can slide in the axial direction and rotate in the circumferential direction. Also formed on the front end side is an inclined portion 232a that guides first operating portion 311b, second operating portion 411b, and third operating portion 511b so that they can slide forward and rotate in the circumferential direction.

[0014] The first ballpoint pen refill 3, the second ballpoint pen refill 4, and the third ballpoint pen refill 5 are housed in the cylindrical case 2, and can be switched between a stored state in which the tip of each refill is recessed into the tip opening 211 formed at the tip of the front case 21 and stored within the cylindrical case 2, and a writing state in which the tip of the refill protrudes from the tip opening 211 formed at the tip of the front case 21 by operating the first slider 31, the second slider 41, and the third slider 51, which act as side knocks, to move back and forth. In addition, when in the stored state, the first ballpoint pen refill 3, the second ballpoint pen refill 4, and the third ballpoint pen refill 5 are supported so as to maintain a distance from each other by the refill through-hole portion 221a of the through-hole support portion 221 integrally molded with the central case 22 (see Figure 2).

[0015] The first ballpoint pen refill 3, the second ballpoint pen refill 4, and the third ballpoint pen refill 5 protrude from the tip opening 211 by sliding the first slider 31, the second slider 41, and the third slider 51, respectively, toward the axial tip. When the first slider 31 is moved to the tip side, a first locking portion 311d, which will be described later, engages with an engaging portion 231b provided on the rear case 23, so that the first slider 31 is fixed in the state where it has moved to the tip side. Then, by slightly sliding the second ballpoint pen refill 4 or the third ballpoint pen refill 5 that does not protrude from the tip opening 211 toward the tip in the axial direction relative to the first ballpoint pen refill 3 protruding from the tip opening 211 and then releasing it, the first ballpoint pen refill 3 that had been protruding from the tip opening 211 will retract from the tip opening 211. The protruding first ballpoint pen refill 3 may also be configured to retract by opening the clip 6. The same applies to the second ballpoint pen refill 4 and the third ballpoint pen refill 5.

[0016] In this embodiment, a multi-color writing instrument 1 is used as an example, but it may also be a multi-function writing instrument having a ballpoint pen refill and a mechanical pencil refill, and the refills used in the multi-color / multi-function writing instrument may be ballpoint pen refills of various colors, mechanical pencil refills, other writing instruments such as felt-tip pens and markers, or input means for electronic devices such as touch pens and electronic pens. In addition, in this embodiment, the multicolor writing instrument 1 has three refills, but it may also be a multicolor / multifunction writing instrument with two refills, or a multicolor / multifunction writing instrument with four or more refills.

[0017] Slider FIG. 6 is a diagram of the first slider 31 of the multicolor writing instrument 1 according to an embodiment of the present invention. FIG. 7 is a diagram showing the relationship between the central case 22, the first slider 31, and the first coil spring 32 of the multicolor writing instrument 1 according to the embodiment of the present invention before assembly. The first slider 31 has a first slider body 311 and a first coil spring support shaft 312, and the first slider body 311 has a first refill mounting portion 311a at its front end and a first operating portion 311b at its rear end, and a first abutment portion 311c formed radially inward between the first refill mounting portion 311a and the first operating portion 311b so as to extend in the axial direction. The first contact portion 311c is formed radially inward at a position circumferentially offset from the first operating portion 311b when viewed from above. The first coil spring support shaft 312 is formed circumferentially offset from the first contact portion 311c on the opposite side of the first operating portion 311b, facing the tip side. Furthermore, a first locking portion 311d that engages with the engaging portion 231b of the rear case 23 is protruded from the rear end portion of the first slider body 311.

[0018] The first refill attachment portion 311a of the first slider 31 is inserted into the rear end portion of the first ballpoint pen refill 3, thereby supporting the first ballpoint pen refill 3. The first coil spring 32 is fitted onto the first coil spring support shaft 312 of the first slider 31. The length of the first coil spring support shaft 312 is formed to be longer than the length of the first coil spring 32, and the tip of the first coil spring support shaft 312 is inserted into a first coil spring support shaft through-hole 221b of a through-hole support portion 221 of the center case 22, which will be described later (see FIGS. 1 and 2). The tip of the first coil spring 32 abuts against the surface surrounding the rear end of the first coil spring support shaft through-hole 221b, and the rear end abuts against the stepped portion 312a at the rear of the first coil spring support shaft 312, respectively. The first coil spring support shaft 312 is configured to be longer than the first coil spring 32, so that it can guide the expansion and contraction of the first coil spring 32. The second slider 41 and the third slider 51 have the same configuration as the first slider 31.

[0019] The means for attaching the first slider 31, the second slider 41, and the third slider 51 to the first ballpoint pen refill 3, the second ballpoint pen refill 4, and the third ballpoint pen refill 5 is not limited to the configuration of the embodiment, and other attachment means may be used, such as attaching the first ballpoint pen refill 3, the second ballpoint pen refill 4, and the third ballpoint pen refill 5 by inserting the rear ends of the first ballpoint pen refill 3, the second ballpoint pen refill 4, and the third ballpoint pen refill 5 into insertion holes formed in the first slider 31, the second slider 41, and the third slider 51. Similarly, other attachment means may be used for attaching the first slider 31, the second slider 41, the third slider 51, the first coil spring 32, the second coil spring 42, and the third coil spring 52.

[0020] [Refill selection mechanism] Figure 8 is a cross-sectional view of a multicolor writing instrument 1 according to an embodiment of the present invention. IIIa, IIIb, IIIc, IIId, IIIe, and IIIf are cross-sectional views taken along lines IIIa-IIIa, IIIb-IIIb, IIIc-IIIc, IIId-IIId, IIIe-IIIe, and IIIf-IIIf in Figure 1, respectively. Note that "+" in the drawing indicates the rotation axes of the first slider 31, the second slider 41, and the third slider 51. The first ballpoint pen refill 3, the second ballpoint pen refill 4, and the third ballpoint pen refill 5 are selectively projected from the tip opening 211 of the front case 21 by a refill selection mechanism. The refill selection mechanism includes a first slider 31, a second slider 41, a third slider 51, a first coil spring 32, a second coil spring 42, and a third coil spring 52. As described above, the first coil spring 32 is fitted onto the first coil spring support shaft 312 of the first slider 31, and biases the first slider 31 and the penetrating support portion 221 in directions separating them from each other. Similarly, the second coil spring 42 and the third coil spring 52 respectively bias the second slider 41, the third slider 51 and the penetrating support portion 221 in directions separating them from each other. The operation of extending and retracting is the same as in the conventional method: when the operating part of the slider of the ballpoint pen refill that you want to protrude is slid toward the tip, the ballpoint pen refill protrudes, and when one of the operating parts of the ballpoint pen refill that is not protruding is slid toward the tip, the protruding ballpoint pen refill retracts from the tip opening 211. In addition, instead of the configuration in which the first coil spring 32 etc. are fitted onto the first coil spring support shaft 312 etc., it is also possible to use other support structures, such as a configuration in which they are fitted onto a support shaft provided in the central case 22. Alternatively, each coil spring may be a tension spring, and each ballpoint pen refill may be biased in a direction pulling the ballpoint pen refill toward the rear end of the cylindrical case 2, thereby causing each ballpoint pen refill to retract from the tip opening 211.

[0021] [Refill rotation] When stored, the first ballpoint pen refill 3, the second ballpoint pen refill 4, and the third ballpoint pen refill 5 are arranged approximately evenly relative to the axis, and are located on the inner surface of the cylindrical case 2 so that the distance between each refill and the axis is approximately equal. The first slider 31, the second slider 41, and the third slider 51 are configured to rotate about an axis parallel to the axial direction when sliding from the storage state to the writing state (see FIG. 8). The first ballpoint pen refill 3, the second ballpoint pen refill 4, and the third ballpoint pen refill 5 also rotate around an axis parallel to the axial direction together with the first slider 31, the second slider 41, and the third slider 51. Due to this rotation, each refill rotates and moves from the inner peripheral surface side of the cylindrical case 2 onto the axis. Since the first ballpoint pen refill 3, the second ballpoint pen refill 4, and the third ballpoint pen refill 5 all have the same configuration, the configuration of the first ballpoint pen refill 3 will be described in detail below.

[0022] As described above, the first coil spring support shaft 312 of the first slider 31 is inserted into the first coil spring support shaft through-hole 221b of the through-hole support portion 221 of the central case 22, and the first slider 31 can rotate around the first coil spring support shaft 312 as an axis. When a user of the multi-color writing instrument 1 operates the first operating portion 311b of the first slider 31, the first slider 31 is sandwiched between the rail portion 231 of the rear case 23 and the inner peripheral surface of the rear case 23 and slides toward the tip. An inclined surface 231a is formed on the front end side of the rail portion 231 (see FIG. 3(b)). In the range up to the rear end of this inclined surface 231a, the first slider body 311 is guided by the rail portion 231 and the first operating portion 311b is guided by the slit portion 232, and the first slider 31 slides in the axial direction.

[0023] When the rear end of the first operating portion 311b passes the rear end of the inclined surface 231a, the first slider 31 becomes able to rotate around the first coil spring support shaft 312 as an axis. The sliding operation also applies a force to the first slider 31 pushing it in the axial direction, causing the first slider 31 to slide forward and, guided by the inclined surface 231a, to rotate around the first coil spring support shaft 312 (see Figure 3(b)). Furthermore, even if the force applied by the sliding operation to push the first slider 31 in the axial direction is extremely weak, as the first operating portion 311b is further slid, it will come into contact with the inclined portion 232a at the tip end of the slit portion 232 and be guided to move in the circumferential direction. Then, the first slider 31 will rotate around the first coil spring support shaft 312 (see FIG. 4). Note that it is also possible to rotate the first operating portion 311b in the circumferential direction together with the sliding operation so that the first slider 31 will rotate before being guided by the inclined portion 232a. As the first slider 31 slides toward the tip side, it also rotates about the first coil spring support shaft 312, and at the tip end of the sliding movement, the first slider 31 moves slightly backward and the first locking portion 311d of the first slider 31 engages with the engaging portion 231b at the tip of the rail portion 231. By this engagement, the first slider 31 is fixed against the biasing force of the first coil spring 32. The first ballpoint pen refill 3 slides and rotates from the stored state due to the sliding and rotating movement of the first slider 31, and is fixed in the writing state. The sliding movement and fixing of this first ballpoint pen refill 3 are the same as those of a conventional multi-color, multi-function writing instrument, except for the rotational movement.

[0024] When the first ballpoint pen refill 3 is in the writing state, if the second operating portion 411b of the second ballpoint pen refill 4 or the third operating portion 511b of the third ballpoint pen refill 5 is slid slightly toward the tip, the convex portion of the second abutment portion 411c of the second ballpoint pen refill 4 or the third abutment portion 511c of the third ballpoint pen refill 5 presses the convex portion of the first abutment portion 311c of the first ballpoint pen refill 3, causing the first locking portion 311d of the first ballpoint pen refill 3 to disengage from the engaging portion 231b of the rail portion 231. The first slider 31 slides rearward because it is biased rearward by the first coil spring 32. During this rearward sliding movement, the rear end of the first slider 31 abuts against the inclined surface 231a of the rail portion 231 of the rear case 23 from the front side. The inclined surface 231a is inclined radially outward and rearward, and the first slider 31 slides rearward while its rear end abuts against the inclined surface 231a, and also rotates about the first coil spring support shaft 312. As the first slider 31 rotates, the first ballpoint pen refill 3 also rotates from the axis toward the inner peripheral surface of the cylindrical case 2.

[0025] When the first slider 31 rotates, the first slider body 311 is guided by the rail portion 231, and the first operating portion 311b is guided by the slit portion 232, and the first slider 31 slides further rearward in the axial direction. The first ballpoint pen refill 3 is rotated and slid from the writing state by the rotational movement and sliding movement of the first slider 31, and is fixed in the stored state. The sliding movement and fixing of this first ballpoint pen refill 3 are the same as those of a conventional multi-color, multi-function writing instrument, except for the rotational movement.

[0026] [Brush feel] FIG. 1(b) is a vertical cross-sectional view of the multicolor writing instrument 1 according to the embodiment of the present invention in a writing state with the first ballpoint pen refill 3. FIG. In the writing state, the first ballpoint pen refill 3 is positioned on the axis of the cylindrical case 2, so that although it is a multi-color writing instrument, writing can be performed with the same feeling as with a single-function writing instrument. Furthermore, in the multi-color writing instrument 1 of the embodiment of the present invention, not only the first ballpoint pen refill 3 but also the second ballpoint pen refill 4 and the third ballpoint pen refill 5 are positioned entirely on the axis of the cylindrical case 2 when in writing, allowing writing with the same feel as with a single-function writing instrument. In other words, in the multi-color writing instrument 1 of the embodiment of the present invention, all ballpoint pen refills are positioned entirely on the axis of the cylindrical case 2 when in writing, which has the excellent effect of allowing writing with the same feel as with a single-function writing instrument.

[0027] [Variations] FIG. 9 is a cross-sectional view of a modified multi-color writing implement according to the present invention. In this modified example, unlike the embodiment, the first operating part 311b', the second operating part 411b', and the third operating part 511b' of the first slider 31', the second slider 41', and the third slider 51' are formed separately from the other main body parts. The first operating part 311b', the second operating part 411b', the third operating part 511b' and the main body side part move integrally in the axial direction and are engaged or abutted with each other so as to be rotatable around the first rotating shaft 311e, the second rotating shaft 411e and the third rotating shaft 511e.

[0028] In this modified example, unlike the embodiment, the slit portion 232' of the rear case 23 is formed narrow over its entire length so that the first operating portion 311b', the second operating portion 411b', and the third operating portion 511b' can only slide in the axial direction. The configuration of the first ballpoint pen refill 3 will be described below. When the first operating portion 311b' is operated toward the tip end while the first ballpoint pen refill 3 is stored, the first operating portion 311b' slides in the axial direction while being guided by the rail portion 231 and the slit portion 232' of the rear case 23. As in the embodiment, the main body side portion is sandwiched between the rail portion 231 of the rear case 23 and the inner peripheral surface of the rear case 23 and slides toward the tip end.

[0029] When the first operating portion 311b' slides a predetermined distance, a part of the main body side portion is guided by the inclined surface of the rear case 23 and rotates around the first coil spring support shaft 312 as an axis. The main body side portion rotates around the first rotation axis 311e relative to the first operating part 311b', enabling the main body side portion that engages or abuts with the first operating part 311b', which only moves by sliding, to rotate around the first coil spring support axis 312. At the leading end of the sliding movement, the first slider 31' moves slightly backward, as in the embodiment, and the first locking portion of the first slider 31' engages with the engagement portion 231b at the tip of the rail portion 231, and the first slider 31' is fixed against the biasing force of the first coil spring 32. At this time, the first ballpoint pen refill 3 attached to the main body side portion is in a writing state with its entirety positioned at the axis of the cylindrical case 2.

[0030] When the first ballpoint pen refill 3 is in the writing state, if the second operating portion 411b' of the second ballpoint pen refill 4 or the third operating portion 511b' of the third ballpoint pen refill 5 is slid slightly toward the tip, the convex portion of the second abutment portion 411c' of the second ballpoint pen refill 4 or the third abutment portion 511c' of the third ballpoint pen refill 5 presses the convex portion of the first abutment portion 311c' of the first ballpoint pen refill 3, causing the first locking portion of the first ballpoint pen refill 3 to disengage from the engaging portion 231b of the rail portion 231. Then, the first slider 31' slides rearward. During this rearward sliding movement, the rear end of the main body side portion abuts against the inclined surface 231a of the rail portion 231 of the rear case 23 from the front side, and slides rearward while rotating around the first coil spring support shaft 312. Along with this rotational movement of the main body side portion, the first ballpoint pen refill 3 also rotates from above the axis toward the inner peripheral surface of the cylindrical case 2. When the main body side portion rotates, the main body side portion is guided by the rail portion 231, and the first operating portion 311b' is guided by the rail portion 231 and the slit portion 232', and the first slider 31' slides further rearward in the axial direction. The first ballpoint pen refill 3 is rotated and slid from the writing state by the rotational movement and sliding movement of the main body side portion, and is fixed in the stored state. In this modified example, as in the embodiment, when in writing, all ballpoint pen refills are positioned entirely on the axis of the cylindrical case 2, so that they protrude parallel to the axis from the tip opening 211, providing the excellent effect of allowing writing with the same feel as with a single-function writing instrument.

[0031] In addition, when the first slider 31, the second slider 41, and the third slider 51 slide from the rear end side to the front end side of the cylindrical case 2, there are guide portions that rotate the first slider 31, the second slider 41, and the third slider 51, respectively, and these guide portions include the inclined surface 231a and the inclined portion 232a in the embodiment and the inclined surface of the rear case 23 in the modified example. Furthermore, when the first slider 31, the second slider 41, and the third slider 51 slide from the front end to the rear end of the cylindrical case 2, an inclined surface rotates the first slider 31, the second slider 41, and the third slider 51, respectively, and this inclined surface includes the inclined surface 231a in the embodiment and modified example.

[0032] The above has described in detail the multi-color writing instrument 1 of an embodiment of the present invention and a modified multi-color writing instrument with reference to the drawings, but the specific configuration is not limited to these embodiments, and the present invention also includes design changes within the scope of the present invention that do not deviate from the gist of the present invention. Furthermore, the above-described embodiments and modifications can be combined by utilizing the techniques of each other, as long as there are no particular contradictions or problems in the purpose, configuration, etc., of the embodiments and modifications. [Explanation of symbols]

[0033] 1 multicolored writing instruments 2 cylindrical cases 21 Front case 211 Tip opening 22 Central Case 221 Penetration support part 221a Refill penetration 221b First coil spring support shaft penetration portion 221c Second coil spring support shaft penetration 221d Third coil spring support shaft penetration 23 Rear case 231 Rail section 231a Slope 231b Engagement part 232 Slit section 232a Slope 3. No. 1 Ballpoint Pen Refill 31 First slider 311 First slider body 311a First refill attachment part 311b 1st operation section 311c 1st contact part 311d 1st locking part 311e First rotating shaft 312 First coil spring support shaft 312a Step 32 First coil spring 4 No. 2 ballpoint pen refills 41 Second slider 411 Second slider body 411b 2nd operation section 411c 2nd contact part 411e Second rotating shaft 412 Second coil spring support shaft 42 Second coil spring 5. Third Ballpoint Pen Refill 51 Third Slider 511 Third slider body 511b 3rd operation section 511c 3rd contact part 511e 3rd rotating shaft 512 Third coil spring support shaft 52 Third coil spring 6 clips

Claims

1. A multi-color, multi-function writing instrument having a plurality of refills in a cylindrical case, A multi-color, multi-function writing instrument characterized in that when the tip of the refill is stored in the cylindrical case, the entire refill is located on the inner surface of the cylindrical case, and when the tip of the refill protrudes from the cylindrical case in a writing state, the entire refill is rotated to be located on the axis of the cylindrical case.

2. The refill is provided with a slider for switching between the storage state and the writing state, the slider slides between the rear end and the front end of the cylindrical case, 2. The multi-color, multi-function writing implement according to claim 1, wherein, during the sliding movement, at least a portion of the slider rotates around a rotation axis parallel to the axis on the inner peripheral surface side of the cylindrical case.

3. 3. The multi-color, multi-function writing instrument according to claim 2, characterized in that the cylindrical case is formed with a guide portion that rotates at least a portion of the slider around the rotation axis in response to the sliding movement of the slider from the rear end side to the front end side of the cylindrical case.

4. 3. The multi-color, multi-function writing implement according to claim 2, wherein the slider can be rotated around the rotation axis in addition to being slid from the rear end to the front end of the cylindrical case.

5. A multi-color, multi-function writing instrument as described in any one of claims 2 to 4, characterized in that the cylindrical case has an inclined surface that causes the slider to rotate from a position on the axis of the cylindrical case to a position on the inner surface side of the cylindrical case when the slider slides from the front end side to the rear end side of the cylindrical case.

6. 5. A multicolor and multifunction writing implement according to claim 1, wherein a spring support shaft for fitting a spring is provided on the rotation shaft.

Images