JP7444510B1 - double writing instrument - Google Patents

Abstract

An object of the present invention is to provide a double-action writing instrument that allows the tip of a writing instrument to be drawn out without changing the hand and has a simplified structure.
A double writing instrument 1 has a plurality of writing bodies 10 each having a sliding piece 11 connected to its rear end, and an insertion part 21 through which each writing body 10 can be inserted in the axial direction. A rotating shaft body 20 provided with a spiral guide groove 25 on its outer peripheral surface, and a slide hole that rotatably accommodates the rotating shaft body 20 and extends in the axial direction in an area corresponding to the insertion portion 21. 31 is provided, and a cylindrical cam 32 on the inner peripheral surface of the rear end side of the area corresponding to the insertion portion 21 is provided with a cylindrical cam 32 on which each sliding piece 11 can slide; The movable member 40 is disposed so as to be movable in the axial direction and has a guide protrusion 45 inserted into the guide groove 25.
[Selection diagram] Figure 2

Description

Application of Article 30, Paragraph 2 of the Patent Act Published at the National College of Technology Design Competition 2022 held at the Omuta Cultural Center (2-10-2 Shiranui-cho, Omuta City, Fukuoka Prefecture) from December 10th to 11th, 2022.

Applicable to Article 30, Paragraph 2 of the Patent Law Design Design 2022 Ariake Official Book (Release date: June 9, 2023, Publication date: June 15, 2023, Edited by the National Federation of Colleges of Technology, General Incorporated Association, Published by Kenchiku Shiryo Kenkyusha Co., Ltd.) ) published on page 122.

TECHNICAL FIELD The present invention relates to a double-action writing instrument that allows the tip of the writing instrument to be drawn out without changing the hand.

Compound writing instruments that are currently commonly used, as typified by Patent Document 1, select individual cursive fonts and push out the protrusion connected to the rear of the cursive font from the rear of the writing instrument. The front shaft part and the rear shaft part are rotated in opposite directions, and a sliding piece connected to the rear part of the writing body is provided in the rear shaft with a cam slope, as typified by Patent Document 2. There is a rotation method in which the cursive is given reciprocating motion by sliding along the cursive, and the tip of the desired cursive is drawn out. However, with either method, it was necessary to change the writing instrument once when drawing out the cursive.

Therefore, a compound writing instrument has been proposed that allows the tip of the writing instrument to be drawn out without changing the writing instrument (for example, see Patent Document 3). This double-action writing instrument has a vertical cylindrical groove in the grip of the pen shaft, a rotary cylinder that rotates internally within the shaft cylinder of the grip, and the same number of vertices as the number of writing fonts on the front of the cylinder. To form a continuous guide moat in the shape of a triangular chevron, to make the tip of the goose rod moving back and forth in the tube groove reach the guide moat, and to push the knob of the gore stick placed outside the tube groove to move the gore rod back and forth and follow the guide moat. The rotating cylinder is configured to be rotated by the rotating cylinder. However, this double writing instrument has a complicated structure and has problems such as requiring processing of the writing body itself.

Publication No. 55-085882 Utility Model Publication No. 61-056091 Japanese Patent Application Publication No. 2000-108585

The present invention was made based on such problems, and an object of the present invention is to provide a double-action writing instrument that allows the tip of the writing instrument to be drawn out without changing the hand, and that has a simplified structure. .

The double writing instrument of the present invention has a plurality of writing bodies each having a sliding piece connected to its rear end, and an insertion part through which each writing part can be inserted in the axial direction, and a spiral guide is provided on the outer peripheral surface of the insertion part. A rotary shaft body provided with a groove, a rotary shaft body rotatably housed inside, a slide hole extending in the axial direction provided in a region corresponding to the insertion portion, and a region corresponding to the insertion portion. The body part is provided with a cylindrical cam on which each sliding piece can slide, on the inner circumferential surface on the rear end side. By moving the moving member along the slide hole, each writing body rotates together with the rotating shaft along the inner circumferential surface of the body, and each sliding piece rotates along the inner peripheral surface of the body. slides along the cylindrical cam, each writing body moves in the axial direction along the cylindrical cam, and the tip of one of the writing bodies is selectively protruded further than the other tips. It is something that

According to the double writing instrument of the present invention, the rotary shaft is rotatably housed inside the body, each writing body is inserted through the insertion portion of the rotary shaft, and a spiral guide groove is provided on the outer circumferential surface of the insertion portion. and a slide hole is provided in the area corresponding to the insertion part of the body part, and each sliding piece is slidable on the inner peripheral surface on the rear end side of the area corresponding to the insertion part of the body part. Since a cylindrical cam is provided and the guide protrusion of the moving member disposed in the slide hole is inserted into the guide groove, the moving member can be moved axially along the slide hole to follow the spiral guide groove. , each writing body can be rotated together with the rotating shaft along the inner peripheral surface of the body. This causes each sliding piece to slide along the cylindrical cam, and each cursive to move axially along the cylindrical cam, selectively placing the tip of one of the cursives ahead of the other. It can also be made to protrude toward the tip. Therefore, the tip of the writing instrument can be easily drawn out by moving the moving member in the axial direction with the thumb or the like without changing the writing instrument.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram illustrating the external configuration of a dual writing instrument according to an embodiment of the present invention. FIG. 2 is an exploded diagram illustrating the configuration of the dual-action writing instrument shown in FIG. 1. FIG. FIG. 2 is an exploded and enlarged diagram illustrating the configuration of a movable body of the dual writing instrument shown in FIG. 1. FIG. FIG. 2 is an enlarged view illustrating the configuration of a slide hole and a moving member of the dual writing instrument shown in FIG. 1. FIG. FIG. 2 is a diagram illustrating the internal configuration of the rear end side of the double writing unit shown in FIG. 1. FIG. FIG. 6 is a diagram showing the configuration of the cylindrical cam shown in FIG. 5; 6 is a diagram illustrating the positional relationship of the cylindrical cams shown in FIG. 5. FIG. FIG. 2 is a diagram illustrating the operation of the double writing instrument shown in FIG. 1. FIG. FIG. 2 is another diagram illustrating the operation of the double writing instrument shown in FIG. 1. FIG. FIG. 2 is yet another diagram illustrating the operation of the double writing instrument shown in FIG. 1. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows the external configuration of a multiple writing instrument 1 according to an embodiment of the present invention. FIG. 2 is an exploded configuration diagram of the double writing instrument 1. As shown in FIG. FIG. 3 shows an exploded and enlarged view of the configuration of the moving member 40 shown in FIG. FIG. 4 shows an enlarged view of the structure of the slide hole 31 and the moving member 40 shown in FIG. FIG. 5 shows the internal configuration of the rear end side of the double 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 cams shown in FIG. 5.

This double writing instrument 1 includes a plurality of writing bodies 10 each having a sliding piece 11 connected to its rear end, 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 rotating shaft body 20. 20 rotatably accommodated therein.

Each writing body 10 has, for example, a body portion 12 extending in the axial direction, a sliding piece 11 is connected to the rear end, and a pen tip 13 is provided at the tip. Examples of the cursive writing 10 include ballpoint pen cursive and mechanical pencil cursive, and either one of them may be used or a mixture thereof may be used. The number of cursive fonts 10 is not particularly limited and can be set arbitrarily. Note that this embodiment will be described using an example in which three ballpoint pens have cursive fonts.

Each writing body 10 is individually biased toward the rear end side by a biasing member 14 such as a spring, for example. Each biasing member 14 biases each writing body 10 individually, for example, by having a tip end locked with the rotating shaft body 20 and a rear end abutting each sliding piece 11 . Although not shown, the rear end of each biasing member 14 may be provided with a protrusion projecting outward on the outer periphery of the rear end side of each writing body 10, and may be engaged with this protrusion.

The insertion portion 21 of the rotating shaft body 20 is configured to allow each sliding piece 11 to protrude toward the rear end side and to allow each main body portion 12 to be inserted in the axial direction. The insertion portion 21 is provided with, for example, a plurality of insertion holes through which each main body portion 12 is individually inserted. For example, the through holes extend in the axial direction and are arranged in parallel along the circumferential direction. On the rear end side of the insertion portion 21, for example, an auxiliary member 23 is provided extending in the axial direction for assisting the movement of each writing body 10 in the axial direction. A plurality of auxiliary grooves 24 are provided in the outer circumferential surface of the auxiliary member 23 in the axial direction, for example, corresponding to each writing body 10 individually. Furthermore, a spiral guide groove 25 is provided on the outer peripheral surface of the insertion portion 21 .

The body portion 30 is, for example, hollow, and is provided with a storage portion that stores the rotating shaft body 20 therein. A slide hole 31 extending in the axial direction is provided in the body portion 30 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.

The moving member 40 connects, for example, an outer member 41 disposed outside the body portion 30 via the slide hole 31 and an inner member 42 disposed inside the body portion 30 via the slide hole 31. (See Figure 3). The widths of the outer member 41 and the inner member 42 are configured to be wider than the width of the slide hole 31, for example. The outer member 41 is provided with a connecting protrusion 43 that is narrower than the width of the slide hole 31, for example. For example, the inner member 42 is provided with a connecting hole 44 that fits the connecting protrusion 43 in correspondence with the connecting protrusion 43, and by fitting the connecting protrusion 43 in the connecting hole 44, the outer The member 41 and the inner member 42 are connected to each other.

Furthermore, the moving member 40 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 inside the inner member 42 . The size of the guide protrusion 45 is formed to correspond to the size of the guide groove 25, for example. 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 moved so that the guide groove 25 corresponds to the position of the guide protrusion 45 as the guide protrusion 45 moves. It is configured to rotate along the inner circumferential surface of the body section 30. For example, when the moving member 40 is moved from the center of the slide hole 31 to the rear end side When the rotary shaft body 20 is moved from the center of the rotary shaft 31 to the distal end side X2, the rotary shaft body 20 rotates in a direction Y2 opposite to one direction according to the spiral guide groove 25 (see FIG. 4). Note that in FIG. 4, a grip portion 52, which will be described later, is omitted.

Furthermore, a cylindrical cam 32 on which each sliding piece 11 can slide is provided on the inner circumferential surface of the body portion 30 on the rear end side of the region corresponding to the insertion portion 21 (see FIGS. 5 and 6). . The cylindrical cam 32 includes, for example, a stepped portion formed by protruding an inner circumferential surface on the rear end side inward. The cylindrical cam 32 includes, for example, a cam flat portion 32A formed in an arcuate cross-section along the circumferential direction, and a pair of cam slopes 32B extending in a sharp shape from both ends of the cam flat portion 32A to the tip side. , a cam top part 32C having a predetermined width where the tips of the pair of cam slopes 32B connect, and a recessed cam bottom part 32D provided at least at both ends of the cam flat part 32A, into which the sliding piece 11 can be removably fitted. have. The cam flat portion 32A and the pair of cam slopes 32B are connected via the cam bottom portion 32D, for example, at both ends of the cam flat portion 32A. Note that, in FIG. 5, a rear end cover body 53, which will be described later, is omitted. In FIG. 6, the configuration of the cylindrical cam 32 is shown.

The number of cam bottoms 32D is determined, for example, according to the number of writing fonts 10, and the number of cam bottoms 32D obtained by subtracting 1 from the number of writing fonts 10 is provided. For example, when the number of writing fonts 10 is three, two cam bottom portions 32D are provided at both ends of the cam flat portion 32A. Further, for example, when the number of writing fonts 10 is four, two cam bottom portions 32D are provided at both ends of the cam flat portion 32A, and one cam bottom portion 32D is provided at the center of the cam flat portion 32A. established in It is preferable that the intervals between the cam top portion 32C and each cam bottom portion 32D are equal when viewed from the axial direction. When there are two cam bottoms 32D, for example, as shown in FIG. 7, a line A1 connecting the shaft center O and the cam top 32C, and lines A2 and A3 connecting the shaft center and each cam bottom 32D are It is preferable that each line forms an angle of 120° when viewed from the axial direction.

As a result, when the moving member 40 is moved along the slide hole 31 and the rotating shaft body 20 is rotated, each sliding piece 11 slides along the cylindrical cam 32, and each writing body 10 moves along the cylindrical cam 32. The tip of one writing body 10 that is moved in the axial direction along the cam top portion 32C and pressed toward the tip side is projected toward the tip side.

Further, which of the writing bodies 10 is selectively projected from the tip side is determined according to the position of the moving member 40 with respect to the slide hole 31. For example, if 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 will protrude from the tip side, and the moving member 40 will be moved to the tip side of the slide hole 31. When the moving member 40 is moved to the center, the other 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. It is becoming more prominent. That is, the position of the movable member 40 with respect to the slide hole 31 and the writing body 10 projected from the tip side are individually determined in correspondence with each other.

This double writing instrument 1 may include a cover body 50 that covers the outside. The cover body 50 has, for example, a front end cover body 51 that covers the front end, a grip section 52 that covers a portion corresponding to the slide hole 31, and a rear end cover 53 that covers the rear end. The grip portion 52 is provided with a grip slide hole 54 corresponding to the slide hole 31. The outer member 41 of the moving member 40 is arranged on the outer side of the grip portion 52 via the grip slide hole 54 and the slide hole 31, for example.

This double writing instrument 1 is used, for example, in the following manner. 8 to 10 are diagrams for explaining the operation of the double writing instrument 1. Moreover, in FIGS. 8 to 10, (A) represents the position of the moving member 40, and (B) represents the position of each writing body 10. In FIGS. 8 to 10, the cover body 50 is omitted. In this double writing instrument 1, by moving the moving member 40 along the slide hole 31, one tip of each writing body 10 is selectively protruded further than the other tips. For example, when there are three writing bodies 10, first, as shown in FIG. cursive 10A) is pressed by the cam top 32C of the cylindrical cam 32, and the tip of the pen (referred to as the first pen tip 13A) protrudes from the tip side.

Next, as shown in FIG. 9, when the moving member 40 is moved to the center of the slide hole 31, the rotating shaft body 20 is moved to the body part 30 so that the guide groove 25 corresponds to the position of the guide protrusion 45. At the same time, each writing body 10 also rotates in one direction. Accordingly, the first writing body 10A, which had been pressed toward the front end by the cam top 32C, moves toward the one cam bottom 32D, and the pressure toward the front end is released, and the biasing member 14 causes the first writing 10A to move toward the front end. Forced to the side. As a result, one sliding piece 11 (referred to as the first sliding piece 11A) located at the cam top 32C of the cylindrical cam 32 slides along the cylindrical cam 32, and slides through one of the cam slopes 32B. and move to one cam bottom 32D. The first writing body 10A moves toward the rear end in the axial direction along the cylindrical cam 32.

In addition, the other sliding piece 11 (referred to as the second sliding piece 11B) located on the other cam bottom 32D slides along the cylindrical cam 32 as the rotating shaft body 20 rotates. and moves to the cam top 32C via the other cam slope 32B. As a result, the other writing body 10 (referred to as the second writing body 10B) that was located on the other cam bottom 32D moves toward the distal end in the axial direction along the cylindrical cam 32, and the cam top 32C is pressed toward the tip side, and the pen tip at the tip (referred to as the second pen tip 13B) is projected from the tip side.

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 body 20 is moved to the body part 30 so that the guide groove 25 corresponds to the position of the guide projection part 45. At the same time, each writing body 10 also rotates in one direction. Accordingly, the second writing body 10B, which had been pressed toward the front end by the cam top 32C, moves toward the one cam bottom 32D, and the pressure toward the front end is released. Forced to the side. As a result, the second sliding piece 11B located at the cam top 32C of the cylindrical cam 32 slides along the cylindrical cam 32, and moves to the cam bottom 32D via the cam slope 32B. The second writing body 10B moves toward the rear end in the axial direction along the cylindrical cam 32.

In addition, the remaining sliding piece 11 (referred to as the third sliding piece 11C) located on the other cam bottom 32D slides along the cylindrical cam 32 as the rotating shaft body 20 rotates. and moves to the cam top 32C via the other cam slope 32B. As a result, the remaining one cursive 10 (referred to as the third cursive 10C) located on the other cam bottom 32D moves toward the distal end in the axial direction along the cylindrical cam 32, and moves to the cam top 32C. is pressed toward the tip side, and the pen tip at the tip (referred to as the third pen tip 13C) is projected from the tip side.

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

As described above, according to the present embodiment, the rotating shaft body 20 is rotatably housed inside the body portion 30, each writing body 10 is inserted into the insertion portion 21 of the rotating shaft body 20, and the writing body 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, and a slide hole 31 is provided in an area corresponding to the insertion part 21 of the body part 30, and a slide hole 31 is provided in the area corresponding to the insertion part 21 of the body part 30 on the rear end side. A cylindrical cam 32 on which each sliding piece 11 can slide is provided on the inner peripheral surface, and the guide protrusion 45 of the moving member 40 disposed in the slide hole 31 is inserted into the guide groove 25, so that the moving member 40 in the axial direction along the slide hole 31, each writing body 10 can be rotated along with the rotating shaft body 20 along the inner peripheral surface of the body portion 30 according to the spiral guide groove 25. . As a result, each sliding piece 11 slides along the cylindrical cam 32, each writing body 10 moves in the axial direction along the cylindrical cam 32, and the tip of one of each writing body 10 is selectively moved. The tip can be made to protrude further than the other tips. Therefore, the tip of the writing instrument 10 can be easily drawn out by moving the moving member 40 in the axial direction with the thumb or the like without changing the writing instrument.

Although the present invention has been described above with reference to the embodiments, the present invention is not limited to the above embodiments 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.

1... Double writing instrument, 10... Cursive, 10A... First cursive, 10B... Second cursive, 10C... Third cursive, 11... Sliding piece, 11A... First sliding piece, 11B ...second sliding piece, 11C...third sliding piece, 12...main body, 13...pen nib, 13A...first pen nib, 13B...second pen nib, 13C...third pen nib , 14... Biasing member, 20... Rotating shaft body, 21... Insertion part, 23... Auxiliary member, 24... Auxiliary groove, 25... Guide groove, 30... Body part, 31... Slide hole, 32... Cylindrical cam, 32A... Cam flat part, 32B... Cam slope, 32C... Cam top, 32D... Cam bottom, 40... Moving member, 41... Outer member, 42... Inner member, 43... Connection protrusion, 44... Connection hole, 45... Guide protrusion. , 50...cover body, 51...tip cover body, 52...grip part, 53...rear end cover body, 54...grip slide hole

Claims (4)

Multiple cursive letters with sliding pieces connected to each other at the rear end,
a rotating shaft body having an insertion part through which each of the writing letters can be inserted in the axial direction, and a spiral guide groove is provided on the outer circumferential surface of the insertion part;
The rotary shaft body is rotatably housed inside, and a slide hole extending in the axial direction is provided in a region corresponding to the insertion portion, and an inner portion on the rear end side of the region corresponding to the insertion portion is provided. a body portion provided with a cylindrical cam on the circumferential surface on which each of the sliding pieces can slide;
an outer member disposed to be movable in the axial direction with respect to the slide hole and disposed outside the body through the slide hole; and an outside member disposed inside the body through the slide hole. a moving member configured by connecting an inner member and having a guide protrusion inserted into the guide groove,
By moving the movable member along the slide hole, each of the writing bodies rotates together with the rotating shaft body along the inner circumferential surface of the body, and each of the sliding pieces rotates along the cylindrical cam. each of the writing bodies moves in the axial direction along the cylindrical cam, and the tip of one of the writing bodies is selectively protruded further toward the tip side than the other tips. A double writing instrument featuring: 2. The compound writing instrument according to claim 1, wherein each of the writing fonts is biased toward a rear end side by a biasing member. The cylindrical cam is
A cam flat part formed in an arc cross section along the circumferential direction;
a pair of cam slopes extending in a sharp shape from both ends of the cam flat portion toward the tip;
a cam top portion of a predetermined width where the tips of the pair of cam slopes connect;
at least a recessed cam bottom provided at both ends of the cam flat portion, into which the sliding piece can be removably fitted;
The double writing instrument according to claim 1, wherein the cam flat portion and the pair of cam slopes are connected to each other via the cam bottom at both ends of the cam flat portion. 2. The compound writing instrument according to claim 1, wherein which of the writing bodies protrudes from the tip side is determined depending on the position of the movable member with respect to the slide hole.