Multi-function writing instrument

Abstract

To provide a multi-function writing instrument capable of advancing the tip of a writing body without changing the grip and having a simplified structure.SOLUTION: A multi-function writing instrument 1 includes a plurality of writing bodies 10 each having a sliding piece 11 connected to a rear end thereof, a rotating shaft body 20 having an insertion portion 21 through which each writing body 10 can be inserted in the axial direction and a spiral guide groove 25 formed on the outer peripheral surface of the insertion portion 21, a body portion 30 which rotatably houses the rotating shaft body 20 therein and has a slide hole 31 extending in the axial direction in a region corresponding to the insertion portion 21 and a cylindrical cam 32 on which each sliding piece 11 can slide, on the inner circumferential surface on the further rear end side than the region corresponding to the insertion portion 21, and a movable member 40 which is arranged so as to be movable in the axial direction relative to the slide hole 31 and has a guide protrusion 45 which is inserted into the guide groove 25.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a multi-function writing instrument that allows the tip of a writing element to be advanced without the need to change the grip. [Background technology]

[0002] Currently, common multi-function writing implements include a method in which an individual writing element is selected and a protrusion connected to the rear of the writing element is pushed out from the rear of the writing implement to advance the tip of the writing element, as typified by Patent Document 1, and a rotation method in which the front and rear shafts are rotated in opposite directions and a sliding top connected to the rear of the writing element is slid along a cam slope provided in the rear shaft to give the writing element a reciprocating motion and advance the tip of the desired writing element, as typified by Patent Document 2. However, with either method, it is necessary to change hands to change writing elements when advancing the writing element.

[0003] Therefore, a multi-function writing instrument that allows the tip of the writing body to be advanced without changing the writing instrument has been proposed (for example, see Patent Document 3). This multi-function writing instrument has a vertical cylindrical groove in the grip of the pen body, a rotating cylinder that rotates inscribed in the barrel of the grip, and a guide groove formed on the surface of the rotating cylinder that is continuous in a triangular mountain shape with the same number of vertices as the number of writing bodies at the front of the cylinder, and is configured so that the tip of the lever that moves back and forth in the cylindrical groove reaches the guide groove, and the lever is moved back and forth by pushing the knob of the lever that has been pushed out of the cylindrical groove to follow the guide groove, thereby rotating the rotating cylinder. However, this multi-function writing instrument has a complex structure and has problems such as the need to process the writing body itself. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 55-085882 [Patent Document 2] Japanese Utility Model Application Publication No. 61-056091 [Patent Document 3] JP 2000-108585 A Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention has been made in light of the above problems, and has an object to provide a multi-function writing instrument that allows the tip of the writing element to be advanced without the need to change the grip and that has a simplified structure. [Means for solving the problem]

[0006] The multi-function writing instrument of the present invention comprises a plurality of writing bodies, each having a sliding piece connected to its rear end, a rotating shaft having an insertion portion through which each writing body can be inserted in the axial direction and a spiral guide groove provided on the outer peripheral surface of the insertion portion, a body portion that rotatably houses the rotating shaft inside and has a slide hole extending in the axial direction provided in a region corresponding to the insertion portion and a cylindrical cam along which each sliding piece can slide, on its inner peripheral surface rearward of the region corresponding to the insertion portion, and a movable member that is arranged to be axially movable relative to the slide hole and has a guide protrusion that is inserted into the guide groove, and by moving the movable member along the slide hole, each writing body rotates together with the rotating shaft along the inner peripheral surface of the body portion, and each sliding piece slides along the cylindrical cam, so that each writing body moves axially along the cylindrical cam, and one tip of each writing body selectively protrudes further towards the tip side than the other tips. Effect of the Invention

[0007] According to the multi-function writing tool of the present invention, the rotating shaft is rotatably housed inside the body, each writing body is inserted into the insertion part of the rotating shaft, a spiral guide groove is provided on the outer peripheral surface of the insertion part, a slide hole is provided in the area of ​​the body corresponding to the insertion part, and a cylindrical cam on which each sliding piece can slide is provided on the inner peripheral surface of the body part rearward of the area corresponding to the insertion part, and the guide protrusion of the moving member arranged in the slide hole is inserted into the guide groove, so that by moving the moving member in the axial direction along the slide hole, each writing body can be rotated together with the rotating shaft along the inner peripheral surface of the body part according to the spiral guide groove. As a result, each sliding piece slides along the cylindrical cam, and each writing body moves axially along the cylindrical cam, so that one tip of each writing body can be selectively protruded further toward the tip side than the other tips. Therefore, the tip of the writing body can be easily advanced by moving the moving member in the axial direction with the thumb or the like without changing the writing tool. [Brief description of the drawings]

[0008] [Figure 1] 1 is a diagram showing the external configuration of a multi-function writing instrument according to an embodiment of the present invention; [Diagram 2] FIG. 2 is an exploded view showing the configuration of the multi-function writing instrument shown in FIG. [Diagram 3] 2 is an exploded and enlarged view showing the configuration of a moving body of the multifunction writing instrument shown in FIG. 1. [Figure 4] 2 is an enlarged view showing the configuration of a slide hole and a moving member of the multifunction writing instrument shown in FIG. 1. [Diagram 5] 2 is a diagram illustrating an internal configuration of the rear end side of the multi-writing unit illustrated in FIG. 1. [Figure 6] FIG. 6 is a diagram illustrating the configuration of the cylindrical cam illustrated in FIG. 5 . [Figure 7] 6 is a diagram for explaining the positional relationship of the cylindrical cams shown in FIG. 5. FIG. [Figure 8] 2A to 2C are diagrams illustrating the operation of the multi-purpose writing instrument shown in FIG. [Figure 9] 1. FIG. 4 is another diagram illustrating the operation of the multi-function writing instrument shown in FIG. [Figure 10]1. FIG. 4 is yet another diagram illustrating the operation of the multi-function writing instrument shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0010] FIG. 1 shows the external configuration of a multi-function writing instrument 1 according to an embodiment of the present invention. FIG. 2 is an exploded view of the multi-function writing instrument 1. FIG. 3 shows an exploded and enlarged view of the configuration of the moving member 40 shown in FIG. 1. FIG. 4 shows an enlarged view of the slide hole 31 and the moving member 40 shown in FIG. 1. FIG. 5 shows the internal configuration of the rear end side of the multi-function writing instrument 1. FIG. 6 shows the configuration of the cylindrical cam 32 shown in FIG. 5. FIG. 7 explains the positional relationship of the cylindrical cam shown in FIG. 5.

[0011] This multi-function writing instrument 1 comprises a plurality of writing bodies 10, each of which has a sliding piece 11 connected to its rear end, a rotating shaft body 20 having an insertion portion 21 through which each of the writing bodies 10 can be inserted in the axial direction, and a body portion 30 which rotatably houses the rotating shaft body 20 therein.

[0012] Each writing body 10 has, for example, a main body 12 extending in the axial direction, a sliding piece 11 connected to the rear end, and a pen tip 13 at the front end. Examples of the writing body 10 include a ballpoint pen writing body and a mechanical pencil writing body, and the writing body 10 may be composed of one of them or a mixture of them. The number of writing bodies 10 is not particularly limited and can be set arbitrarily. In this embodiment, an example will be described in which there are three ballpoint pen writing bodies.

[0013] Each writing unit 10 is individually biased toward the rear end by a biasing member 14 such as a spring. For example, the front end of each biasing member 14 is engaged with the rotating shaft body 20, and the rear end is abutted against each sliding top 11, thereby biasing each writing unit 10 individually. Although not shown, the rear end of each biasing member 14 may be engaged with a protrusion that protrudes outward from the outer periphery of the rear end side of each writing unit 10.

[0014] The insertion portion 21 of the rotating shaft body 20 is configured so that each of the main body parts 12 can be inserted in the axial direction by projecting each of the sliding pieces 11 toward the rear end side. The insertion portion 21 is provided with, for example, a plurality of insertion holes through which each of the main body parts 12 is individually inserted. Each of the insertion holes is, for example, extended in the axial direction and arranged in a line along the circumferential direction. At the rear end side of the insertion portion 21, for example, an auxiliary member 23 for assisting the axial movement of each of the writing elements 10 is provided so as to extend in the axial direction. On the outer peripheral surface of the auxiliary member 23, for example, a plurality of auxiliary grooves 24 are provided in the axial direction, each of which corresponds to each of the writing elements 10 individually. In addition, a spiral guide groove 25 is provided on the outer peripheral surface of the insertion portion 21.

[0015] The body portion 30 is, for example, hollow and has a storage portion therein for storing the rotating shaft body 20. The body portion 30 has a slide hole 31 extending in the axial direction in a region corresponding to the insertion portion 21 of the rotating shaft body 20. A moving member 40 is disposed in the slide hole 31 so as to be movable in the axial direction.

[0016] The moving member 40 is configured, for example, by connecting an outer member 41 arranged on the outside of the body part 30 through the slide hole 31 with an inner member 42 arranged on the inside of the body part 30 through the slide hole 31 (see FIG. 3). The widths of the outer member 41 and the inner member 42 are configured, for example, to be wider than the width of the slide hole 31. The outer member 41 is provided with, for example, a connecting protrusion 43 narrower than the width of the slide hole 31. The inner member 42 is provided with, for example, a connecting hole 44 corresponding to the connecting protrusion 43 and into which the connecting protrusion 43 is fitted, and the outer member 41 and the inner member 42 are connected by fitting the connecting protrusion 43 into the connecting hole 44.

[0017] The moving member 40 also has a guide protrusion 45 that is inserted into the guide groove 25 of the rotating shaft body 20. The guide protrusion 45 is provided, for example, so as to protrude inward from the inner member 42. The size of the guide protrusion 45 is formed, for example, to correspond to the size of the guide groove 25. As a result, when the moving member 40 is moved in the axial direction along the slide hole 31, the rotating shaft body 20 is configured to rotate along the inner circumferential surface of the body part 30 in accordance with the movement of the guide protrusion 45 so that the guide groove 25 corresponds to the position of the guide protrusion 45. For example, when the moving member 40 is moved from the center of the slide hole 31 to the rear end side X1, the rotating shaft body 20 rotates in one direction Y1 according to the spiral guide groove 25, and when the moving member 40 is moved from the center of the slide hole 31 to the tip end side X2, the rotating shaft body 20 rotates in the opposite direction Y2 according to the spiral guide groove 25 (see FIG. 4). In addition, a grip portion 52, which will be described later, is omitted in FIG.

[0018] Also, a cylindrical cam 32 on which each sliding piece 11 can slide is provided on the inner peripheral surface of the body part 30 on the rear end side of the region corresponding to the insertion part 21 (see Figs. 5 and 6). The cylindrical cam 32 is, for example, configured by a step portion formed by protruding the inner peripheral surface on the rear end side inward. The cylindrical cam 32 has, for example, a cam flat part 32A formed in an arc-shaped cross section along the circumferential direction, a pair of cam slopes 32B extending from both ends of the cam flat part 32A to the tip end side in a pointed shape, a cam top part 32C of a predetermined width to which the tips of the pair of cam slopes 32B are connected, and a cam bottom part 32D in a recessed shape that is provided at least on both ends of the cam flat part 32A and into which the sliding piece 11 can be detachably fitted. The cam flat part 32A and the pair of cam slopes 32B are connected, for example, at both ends of the cam flat part 32A via the cam bottom part 32D. In addition, a rear end cover body 53, which will be described later, is omitted in Fig. 5. In Fig. 6, the configuration of the cylindrical cam 32 is shown.

[0019] The number of cam bottoms 32D is determined according to the number of writing bodies 10, and the number of cam bottoms 32D is the number of writing bodies 10 minus one. For example, when the number of writing bodies 10 is three, two cam bottoms 32D are provided at both ends of the cam flat portion 32A. Also, when the number of writing bodies 10 is four, two cam bottoms 32D are provided at both ends of the cam flat portion 32A, and one cam bottom 32D is provided at the center of the cam flat portion 32A. It is preferable that the intervals between the cam tops 32C and each cam bottom 32D when viewed from the axial direction are equal. When there are two cam bottoms 32D, for example, as shown in FIG. 7, when the line A1 connecting the axis center O and the cam tops 32C and the lines A2 and A3 connecting the axis center and each cam bottom 32D are viewed from the axial direction, the angle between each line is preferably 120°.

[0020] As a result, when the movable member 40 is moved along the slide hole 31 to rotate the rotating shaft body 20, each sliding top 11 slides along the cylindrical cam 32, and each writing body 10 moves axially along the cylindrical cam 32, so that the tip of one writing body 10 pressed toward the tip side by the cam top 32C is protruded toward the tip side.

[0021] In addition, which of the writing bodies 10 is selectively projected from the tip side is determined according to the position of the moving member 40 relative to the slide hole 31. For example, in the case where there are three writing bodies 10, when the moving member 40 is moved to the tip side of the slide hole 31, one writing body 10 is projected from the tip side, when the moving member 40 is moved to the center part of the slide hole 31, another writing body 10 is projected from the tip side, and when the moving member 40 is moved to the rear end side of the slide hole 31, the remaining writing body 10 is projected from the tip side. That is, the position of the moving member 40 relative to the slide hole 31 and the writing body 10 projected from the tip side are determined individually corresponding to each other.

[0022] This multi-function writing instrument 1 may be provided with a cover body 50 that covers the outside. The cover body 50 has, for example, a tip cover body 51 that covers the tip portion, a grip portion 52 that covers the portion corresponding to the slide hole 31, and a rear end cover body 53 that covers the rear end portion. The grip portion 52 is provided with a grip slide hole 54 that corresponds to the slide hole 31. The outer member 41 of the moving member 40 is disposed on the outside of the grip portion 52, for example, via the grip slide hole 54 and the slide hole 31.

[0023] For example, this multi-function writing instrument 1 is used as follows. Figures 8 to 10 are diagrams for explaining the operation of the multi-function writing instrument 1. In addition, in Figures 8 to 10, (A) shows the position of the moving member 40, and (B) shows the position of each writing body 10. In Figures 8 to 10, the cover body 50 is omitted. In this multi-function writing instrument 1, by moving the moving member 40 along the slide hole 31, the tip of one of the writing bodies 10 is selectively protruded toward the tip side more than the other tips. For example, in the case of three writing bodies 10, first, as shown in Figure 8, when the moving member 40 is positioned on the tip side of the slide hole 31, one of the writing bodies 10 (referred to as the first writing body 10A) is pressed by the cam top 32C of the cylindrical cam 32, and the tip pen tip (referred to as the first pen tip 13A) is protruded from the tip side.

[0024] Next, as shown in FIG. 9, when the moving member 40 is moved to the center of the slide hole 31, the rotating shaft 20 rotates in one direction along the inner circumferential surface of the body 30 so that the guide groove 25 corresponds to the position of the guide protrusion 45, and each writing body 10 also rotates in one direction. Accordingly, the first writing body 10A, which has been pressed toward the tip side by the cam top 32C, moves toward one cam bottom 32D, and the pressure toward the tip side is released, and the writing body 10A is pressed toward the rear end side by the biasing member 14. As a result, one sliding top 11 (referred to as the first sliding top 11A) located at the cam top 32C of the cylindrical cam 32 slides along the cylindrical cam 32 and moves to one cam bottom 32D via one cam inclined surface 32B. The first writing body 10A moves toward the rear end side along the cylindrical cam 32 in the axial direction.

[0025] Also, the other sliding top 11 (referred to as the second sliding top 11B) located at the other cam bottom 32D slides along the cylindrical cam 32 as the rotating shaft 20 rotates, and moves to the cam top 32C via the other cam inclined surface 32B. As a result, the other writing body 10 (referred to as the second writing body 10B) located at the other cam bottom 32D moves axially toward the tip side along the cylindrical cam 32, and is pressed toward the tip side by the cam top 32C, causing the pen tip at the tip (referred to as the second pen tip 13B) to protrude from the tip side.

[0026] Next, as shown in FIG. 10, when the moving member 40 is moved to the rear end side of the slide hole 31, the rotating shaft 20 rotates in one direction along the inner circumferential surface of the body 30 so that the guide groove 25 corresponds to the position of the guide protrusion 45, and each writing body 10 also rotates in one direction. Accordingly, the second writing body 10B, which has been pressed toward the tip side by the cam top 32C, moves toward one cam bottom 32D, and the pressure toward the tip side is released, and it is urged toward the rear end side by the urging member 14. As a result, the second sliding top 11B, which has been positioned at the cam top 32C of the cylindrical cam 32, slides along the cylindrical cam 32 and moves to one cam bottom 32D via one cam inclined surface 32B. The second writing body 10B moves toward the rear end side along the cylindrical cam 32 in the axial direction.

[0027] Furthermore, the remaining sliding top 11 (referred to as the third sliding top 11C) located at the other cam bottom 32D slides along the cylindrical cam 32 as the rotating shaft 20 rotates, and moves to the cam top 32C via the other cam inclined surface 32B. As a result, the remaining writing element 10 (referred to as the third writing element 10C) located at the other cam bottom 32D moves axially toward the tip side along the cylindrical cam 32, and is pressed toward the tip side by the cam top 32C, causing the pen tip at the tip (referred to as the third pen tip 13C) to protrude from the tip side.

[0028] Furthermore, when the moving member 40 is moved from the rear end side of the slide hole 31 to the center, or from the center to the tip side, the rotating shaft 20 rotates in the opposite direction to the one direction along the inner circumferential surface of the body 30 so that the guide groove 25 corresponds to the position of the guide protrusion 45, and operates as described above, so that the second writing body 10B or the first writing body 10A is pressed toward the tip side by the cam top 32C, and the second pen tip 13B or the first pen tip 13A at the tip is projected from the tip side. In this way, by changing the position of the moving member 40 relative to the slide hole 31, one of the writing bodies 10 corresponding to the position is projected from the tip side.

[0029] In this manner, according to this embodiment, the rotating shaft body 20 is rotatably stored inside the body 30, each writing element 10 is inserted into the insertion portion 21 of the rotating shaft body 20, a spiral guide groove 25 is provided on the outer peripheral surface of the insertion portion 21, a slide hole 31 is provided in the area of ​​the body 30 corresponding to the insertion portion 21, and a cylindrical cam 32, on which each sliding piece 11 can slide, is provided on the inner peripheral surface of the body 30 rearward of the area corresponding to the insertion portion 21, and the guide protrusion 45 of the movable member 40 arranged in the slide hole 31 is inserted into the guide groove 25. Therefore, by moving the movable member 40 axially along the slide hole 31, each writing element 10 can be rotated together with the rotating shaft body 20 along the inner peripheral surface of the body 30 in accordance with the spiral guide groove 25. As a result, each sliding top 11 slides along the cylindrical cam 32, and each writing unit 10 moves axially along the cylindrical cam 32, allowing one tip of each writing unit 10 to selectively protrude further toward the tip side than the other tips. Therefore, the tip of the writing unit 10 can be easily advanced by moving the moving member 40 in the axial direction with the thumb or the like without having to change hands with the writing implement.

[0030] Although the present invention has been described above with reference to the embodiment, the present invention is not limited to the above embodiment and can be modified in various ways. For example, although each component has been specifically described, the specific structure and shape of each component may be different. Furthermore, it is not necessary to include all of the above-mentioned components, and other components may be included. [Explanation of symbols]

[0031] REFERENCE SIGNS LIST 1...multi-function writing implement, 10...writing body, 10A...first writing body, 10B...second writing body, 10C...third writing body, 11...sliding top, 11A...first sliding top, 11B...second sliding top, 11C...third sliding top, 12...main body, 13...pen tip, 13A...first pen tip, 13B...second pen tip, 13C...third pen tip, 14...urging member, 20...rotating shaft body, 21...insertion portion, 23...auxiliary member, 2 4...auxiliary groove, 25...guide groove, 30...body portion, 31...slide hole, 32...cylindrical cam, 32A...cam flat portion, 32B...cam inclined surface, 32C...cam top portion, 32D...cam bottom portion, 40...moving member, 41...outer member, 42...inner member, 43...connecting projection portion, 44...connecting hole, 45...guide projection portion, 50...cover body, 51...front end cover body, 52...grip portion, 53...rear end cover body, 54...grip slide hole

Claims

1. A plurality of writing bodies each having a sliding piece connected to a rear end thereof; a rotating shaft having an insertion portion through which each of the writing bodies can be inserted in an axial direction, the insertion portion having an outer peripheral surface on which a spiral guide groove is provided; a body portion that rotatably houses the rotating shaft body therein, the body portion having a slide hole extending in the axial direction in a region corresponding to the insertion portion, and a cylindrical cam on which the sliding pieces can slide, the cylindrical cam being provided on an inner peripheral surface rearward of the region corresponding to the insertion portion; a movable member that is axially movable relative to the slide hole and has a guide protrusion that is inserted into the guide groove, By moving the moving member along the slide hole, the writing bodies rotate together with the rotating shaft along the inner circumferential surface of the body, and the sliding tops slide along the cylindrical cam, so that the writing bodies move axially along the cylindrical cam, and one tip of each of the writing bodies selectively protrudes further forward than the other tips. A multi-function writing instrument characterized by:

2. 2. The multi-function writing implement according to claim 1, wherein each of said writing elements is biased toward its rear end by a biasing member.

3. The cylindrical cam is A cam flat portion formed in a circular arc cross section along a circumferential direction; A pair of cam inclined surfaces extending from both ends of the cam flat portion toward a tip end, a cam apex having a predetermined width where the tips of the pair of cam slopes are connected; a concave cam bottom portion provided at least at both ends of the cam flat portion and into which the sliding piece can be detachably fitted; At both ends of the cam flat portion, the cam flat portion and the pair of cam inclined surfaces are connected via the cam bottom portion.

2. The multi-function writing implement according to claim 1.

4. 2. The multi-function writing implement according to claim 1, wherein which of said writing elements protrudes from the tip side is determined according to the position of said movable member relative to said slide hole.

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