JP7100642B2 - Stationery - Google Patents

Description

The present invention relates to a writing instrument that can be used by selecting one of a plurality of cursive writing bodies.

Conventionally, in a composite writing tool in which a plurality of writing shafts are housed in a shaft cylinder and the tip of one writing shaft can be selectively projected from the tip opening of the shaft cylinder from among the plurality of writing shafts, the shaft cylinder is used. Consists of a front axle cylinder and a rear axle cylinder that can rotate relative to the front axle cylinder, and the outer diameter of the axle cylinder is 10.5 mm or less. On the other hand, a cam body that cannot rotate and a slider that cannot rotate with respect to the toe shaft cylinder and is connected to the rear end of each writing shaft are provided, and the cam body faces forward. A protruding V-shaped cam protrusion is formed, a cam surface facing forward along the cam protrusion is formed, and a locking portion is formed at the apex portion of the cam protrusion on the cam surface. A V-shaped cam protruding rearward is formed on the slider, and a sliding contact surface facing rearward is formed along the cam, and the sliding contact surface presses against the cam surface. By the relative rotation between the rear axle cylinder and the front axle cylinder, the sliding contact surface of the cam slides into contact with the cam surface, and one cam is locked to the locking portion. There is known a writing tool in which the tip of a writing shaft selectively connected to a slider provided with the cam protrudes from the tip opening of the barrel (see, for example, Patent Document 1). According to this writing tool, while the outer diameter of the shaft tube is small, a plurality of knock rods are not exposed as in the conventional case, and a return button or the like is not required, providing a writing tool that looks good and has good operability. be able to.

Further, conventionally, a plurality of cursives including a cursive and a cursive provided in the cursive so as to be forwardable and backward and have a core accommodating portion, and a part of the cursive are formed, and one end of the cursive is advanced or retracted. A member that advances or retracts the core accommodating portion by sliding in the direction, so that the slide member in which the core accommodating portion is inserted at the other end, which is the non-operation side end, and the tip of the cursive project. Further, there is known a writing instrument provided with a tip hole provided at the tip of the shaft cylinder eccentrically toward the core accommodating portion side with respect to the shaft center in the shaft radial direction (for example, Patent Document 2 and Patent Document). 3). According to these writing tools, a composite writing tool having a short overall length can be provided by inserting a core accommodating portion into a slide member so that a part of the core can be accommodated.

Patent Document 1: Japanese Unexamined Patent Publication No. 2005-161829 (see, for example, paragraph 0008 and paragraph 0014). Republished Patent WO2010 / 024346 (see, for example, paragraphs 0008 and 0012). Japanese Unexamined Patent Publication No. 2011-07338 (see, for example, FIG. 1).

However, conventionally, in a writing instrument capable of projecting one of a plurality of cursives from the tip, it has been required to provide a writing instrument capable of projecting the one cursive along an axis.

An object of the present invention is to provide a writing instrument having a plurality of cursives, in which one cursive can be projected along an axis.

In one aspect of the writing tool according to the present invention, in a writing tool provided with a plurality of cursives and capable of projecting one of the plurality of cursives from the tip, the cursives are arranged radially offset from the axis and are arranged in the axis direction. It comprises a plurality of reciprocating sliders and a holder that connects the one cursive to one of the plurality of sliders so that one of the plurality of cursives extends substantially on the axis at all times. The other cursives among the plurality of cursives are arranged so as to be radially offset from the axis.

In a plurality of aspects according to the present invention, in a writing instrument including a plurality of cursives, it is possible to provide a writing instrument capable of projecting one cursive along an axis.

It is a top view which shows the appearance of the writing instrument which concerns on one Embodiment of this invention. FIG. 2 is a sectional view taken along line II-II of FIG. 1 of a writing instrument according to an embodiment of the present invention. It is a front view which shows the holder of the writing instrument which concerns on one Embodiment of this invention. It is a figure which shows the holder of the writing instrument which concerns on one Embodiment of this invention seen from the front. It is a VV sectional view of FIG. 4 which shows the holder of the writing instrument which concerns on one Embodiment of this invention. It is a front view which shows the state which the cursive of the writing instrument which concerns on one Embodiment of this invention protrudes from the tip mouth, and is a partial sectional view which mainly shows a mechanical pencil refill, a holder, and a guide member. FIG. 6 is a schematic cross-sectional view taken along the line VII-VII of FIG. 6 showing a writing instrument according to an embodiment of the present invention. It is a partial cross-sectional front view schematically showing a state in which the cursive of the writing instrument according to the embodiment of the present invention is immersed in the tip mouth, and is a diagram mainly showing a mechanical pencil refill, a holder, and a guide member. FIG. 2 is a schematic cross-sectional view taken along the line IX-IX of FIG. 2 of a writing tool according to an embodiment of the present invention. It is a partial cross-sectional front view schematically showing a state in which a cursive body protrudes from a tip in a modified example of a writing instrument according to an embodiment of the present invention, and is a diagram mainly showing a mechanical pencil refill, a holder, and a guide member. Is.

Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing the appearance of the writing tool 1 according to the embodiment of the present invention. The writing tool 1 includes a shaft cylinder 2 including a front shaft 20 and a rear shaft 30, and a clip 6 attached to the rear shaft 30 of the shaft cylinder 2. Here, in the following description, the front axis 20 side is the front side of the writing tool 1 along the axis L direction in the longitudinal direction of the writing tool 1, and the opposite rear axis 30 side is the rear side.

The writing instrument 1 includes one mechanical pencil refill 3 and two ballpoint pen refills 4 (see FIG. 2) as a plurality of cursives, and by rotating the front shaft 20 and the rear shaft 30 relative to each other, the writing instrument 1 is sequentially one. The cursive is projected from the tip opening 25 of the tip, which is a tapered portion of the tip shaft 20, so that a desired cursive can be selected and used.

As shown in FIG. 2, the toe shaft 20 is formed in a substantially cylindrical shape. The tip of the tip shaft 20 is tapered, and a tip opening 25 is formed at the tip of the tip. A tubular fitting cylinder 21 is detachably inserted into the rear end opening of the front shaft 20. The insertion of the fitting cylinder 21 into the front shaft 20 is restricted by the contact flange 21a formed in an annular shape on the outer periphery of the central portion of the fitting cylinder 21 in contact with the rear end of the front shaft 20. In the rear end opening of the fitting cylinder 21, a holding cylinder portion 51a formed in a substantially cylindrical shape in the front portion of the guide member 51, which will be described later, is press-fitted and fixed. A guide portion 51b for guiding the sliding of the sliders 55 and 56, which will be described later, is formed at the rear portion of the guide member 51. The guide portion 51b is formed in a substantially columnar shape, and slide guides 51b1, 51b2, 51b3, which are three grooves extending in the axial direction, are formed on the outer peripheral surface thereof. A slider 55 to which a holder 52 for holding the mechanical pencil refill 3 is attached is slidably attached to the slide guide 51b1. A slider 56 to which a holder 53 for holding the ballpoint pen refill 4 is attached is slidably assembled to the slide guides 51b2 and 51b3.

As will be described in detail later, the rear end of the lead tank 3a of the mechanical pencil refill 3 is press-fitted into the front end opening of the holder 52 that holds the mechanical pencil refill 3. On the other hand, the holder 53 for holding the ballpoint pen refill 4 is formed in a substantially rod shape, and a cylindrical joint 58 is fixed to the tip thereof. The rear end of the ink tank of the ballpoint pen refill 4 is detachably press-fitted into the tip opening of the joint 58. Cam followers 55a, 56a that engage with the cam surface 54a of the rotary cam 54, which will be described in detail later, are formed on the outer peripheral surface of the sliders 55, 56 in the radial direction. A pressing spring 57, which is a compression coil spring, is arranged between the rear surface of the holding cylinder portion 51a of the guide member 51 and the sliders 55 and 56, respectively. The sliders 55 and 56 are constantly urged rearward by the pressing spring 57 and pressed onto the cam surface 54a of the rotary cam 54, which will be described in detail later. Therefore, due to the rotation of the rotary cam 54, each of the cam followers 55a, 56a of the sliders 55, 56 follows the cam surface 54a of the rotary cam 54 and moves in the axial direction. The mechanical pencil refill 3 and the ballpoint pen refill 4 attached to the sliders 55 and 56 are movably guided by the slide guides 51b1, 51b2, 51b3 of the guide member 51 in a state of being constantly urged backward by the pressing spring 57. As will be described in detail later, it is selectively moved back and forth by the cam mechanism 50, which is a cursive appearance mechanism.

The rotary cam 54 is formed in a substantially cylindrical shape with the tip of the cylindrical member cut diagonally, and the inclined tip portion is arranged forward as the cam surface 54a. Therefore, the rotary cam 54 is formed in a substantially V shape in a plan view. A notch (not shown) is formed at the tip of the rotary cam 54 so that it can engage with the tops of the cam followers 55a and 56a formed in a substantially pentagonal shape of the sliders 55 and 56. A guide member rotation support shaft 51c is formed at the rear end of the guide portion 51b of the guide member 51. The guide member rotation support shaft 51c has a shaft portion 51c1 and a collar portion 51c2 for preventing retaining, which is formed in an umbrella shape at the rear end of the shaft portion 51c1. An annular rib 54b is formed on the inner peripheral surface of the rotary cam 54 so as to project in an annular shape. The guide member rotation support shaft 51c is rotatably assembled to the annular rib 54b of the rotation cam 54. The rotary cam 54 is rotatable with respect to the guide member 51 in the circumferential direction about the axis L. When the front surface of the flange portion 51c2 of the guide member rotation support shaft 51c comes into contact with the rear surface of the annular rib 54b of the rotation cam 54, the forward movement of the guide member 51 with respect to the rotation cam 54 is restricted.

A caulking portion 30a projecting from the inner peripheral surface of the rear shaft 30 is formed in the vicinity of the rear end of the rear shaft 30. When the caulked portion 30a of the rear shaft 30 and the outer peripheral surface of the rotary cam 54 are engaged, the rotary cam 54 is fixed to the rear shaft 30. The front portion of the eraser holder 31 formed in a substantially cylindrical shape is screwed to the rear end portion of the rotary cam 54 formed in a substantially cylindrical shape so as to penetrate the base portion 6a of the clip 6 formed in an annular shape. To. An eraser 32, which is an eraser, is detachably inserted into the rear portion of the eraser holder 31. A male screw portion is formed on the outer periphery of the rear portion of the eraser holder 31, and the rear shaft cap 33 is screwed onto the rear shaft cap 33. An O-ring 34 is arranged between the rear shaft cap 33 and the rear portion of the eraser holder 31 to prevent loosening of the screwing between the rear shaft cap 33 and the eraser holder 31.

The front end of the rear shaft 30 is press-fitted into the rear end opening of the tubular decorative ring 35. The decorative ring 35 covers the gap formed between the front end of the rear shaft 30 and the rear end of the front shaft 20. The gap formed between the front end of the rear shaft 30 and the rear end of the front shaft 20 secures a knock stroke for extending the writing center of the mechanical pencil refill 3.

The cam mechanism 50 includes a guide member 51, a holder 52 for a mechanical pencil refill 3, a holder 53 for a ballpoint pen refill 4, a rotary cam 54, sliders 55 and 56, a pressing spring 57, and a joint 58. Be prepared. The rear shaft 30, the rotary cam 54, the eraser holder 31, and the rear shaft cap 33 are integrally rotatable with respect to the guide member 51 and the fitting cylinder 21 in the circumferential direction. The cam mechanism 50 can press the sliders 55, 56, to which one of a plurality of selected cursives is connected, so as to project forward.

The mechanical pencil refill 3 can have any known configuration. The mechanical pencil refill 3 includes a cylindrical core tank 3a whose trailing end is assembled to the holder 52. A writing core feeding mechanism 40 is attached to the front end of the core tank 3a. Specifically, the rear portion of the chuck joint 41 is detachably press-fitted into the front end opening of the core tank 3a. A chuck 42 is press-fitted and fixed to the front portion of the chuck joint 41. A middle cylinder member 43 is arranged on the outer periphery of the chuck joint 41 and the chuck 42 so as to be relatively movable back and forth with respect to the chuck joint 41. A chuck ring 44 is arranged on the outer periphery of the large diameter portion of the chuck 42 in front of the middle cylinder member 43. The chuck ring 44 is restricted from moving forward by the large diameter portion of the chuck 42. A chuck spring 45 is arranged on the outer periphery of the chuck 42 between the annular step portion formed on the inner peripheral surface of the middle cylinder member 43 and the front end of the chuck joint 41. The middle cylinder member 43 and the chuck ring 44 are urged forward by the chuck spring 45. The backward movement of the middle cylinder member 43 exceeding a predetermined amount is restricted by the annular protrusion 41a formed on the outer periphery of the chuck joint 41. A tip 46 having an annular step portion formed on the outer periphery thereof is screwed to the front portion of the middle cylinder member 43. A core breaker 47 that grips the writing core W is assembled inside the tip side of the tip 46.

In the mechanical pencil refill 3 configured as described above, the rear end of the rear shaft 30 is knocked while the cam follower 55a of the slider 55 is engaged with the tip of the cam surface 54a of the rotary cam 54. The outer peripheral step portion of the tip 46 abuts on the inner edge of the tip opening 25 of the tip shaft 20, and the chuck 42 and the chuck ring 44 are fitted and detached, so that the writing core feeding mechanism 40 operates and the writing core W is sent forward. Is done. The ballpoint pen refill 4 has a known ballpoint pen tip 4a and an ink tank 4b, but detailed description thereof will be omitted here.

Next, the holder 52 will be described in detail with reference to FIGS. 3 to 5. The holder 52 includes a holder main body 521 formed in a columnar shape and an axial extending portion 522 formed in a substantially cylindrical shape. The holder body 521 has a longitudinal central axis LH offset by a predetermined amount in the radial direction from the axis L. The extension portion 522 on the axis of the holder 52 extends on the axis L of the writing tool 1. The holder 52 has a radial extending portion extending in the radial direction by a predetermined amount between the central axis LH and the axis L of the holder main body 521. The inner peripheral surface of the extending portion 522 on the axis is configured so that the inner circumference of the rear portion has a smaller diameter than the inner circumference of the front portion. With this configuration, the mechanical pencil refill 3 can be assembled to the holder body 521 so as to have a predetermined elasticity in the radial direction. Further, when the holder 52 itself has a predetermined elasticity in the radial direction, when a plurality of cursives interfere with each other on the axis L and operate as described in detail later, the other cursives have a mechanical pencil refill 3. It is preferable because the tip can be pushed out from the axis L. Further, a plurality of introduction portions (introduction slopes) 522a are formed at the boundary portion where the inner circumference of the extension portion 522 on the axis is reduced in diameter so that the mechanical pencil refill 3 can be easily press-fitted. The rear end of the lead tank 3a of the mechanical pencil refill 3 is detachably press-fitted into the inner circumference of the extending portion 522 on the axis. Since the extending portion 522 on the axis line is assembled to the core tank 3a so as to cover the outer periphery of the core tank 3a, it is possible to sufficiently secure the capacity in the core tank 3a. A columnar slider mounting shaft 553 is formed at the rear end of the holder body 521. The outer peripheral surface of the slider mounting shaft 553 of the holder 52 is detachably press-fitted into the opening at the tip of the slider 55.

Here, as shown in FIG. 2, the mechanical pencil refill 3 held by the extension portion 522 on the axis of the holder 52 is radially inward from the axis LH of the holder body 521, and the distance from the axis LH to the axis L. Offset by only, it extends on the axis L of the writing instrument 1. As shown in FIG. 7, the holder body 521 of the holder 52 to which the mechanical pencil refill 3 is assembled and the holder 53 to which the two ballpoint pen refills 4 are assembled are arranged so as to be offset radially outward from the axis L. To. In this state, the holder body 521 of the holder 52 connects the mechanical pencil refill 3 to the slider 55, and the holder 53 connects the ballpoint pen refill 4 to the slider 56. The sliders 55 and 56 are guided by slide guides 51b1, 51b2 and 51b3 which are offset radially from the central axis and arranged at equal intervals in the circumferential direction in the guide portion 51b. As shown in FIG. 9, the mechanical pencil refill 3 (writing core feeding mechanism 40, core tank 3a) may be pressed by the ballpoint pen refill 4 and only the tip thereof may be extruded from the axis L as described in detail later. However, it is offset inward in the radial direction from the axis LH and is arranged so as to substantially always extend on the axis L.

In this way, the mechanical pencil refill 3 is arranged so as to extend substantially on the axis L at all times, and is projected along the axis L. Therefore, it is possible to reduce the problem that the writing core W is broken by the tip of the writing core feeding mechanism 40 or the like, as compared with the case where the writing core W is arranged at an angle with respect to the axis L at the time of protrusion as in the conventional case. .. In the present embodiment, the writing core W containing graphite as a colorant is used, but in another embodiment using another colored writing core having a relatively low strength, the writing core protrudes along the axis L. It is even more preferable to do so.

As described above, the holder 52 is configured to grip the mechanical pencil refill 3 (writing core feeding mechanism 40) so as to have a predetermined elasticity in the radial direction. As described above, when any other ballpoint pen refill 4 other than the mechanical pencil refill 3 is selected by the cam mechanism 50 and protrudes forward, the ballpoint pen refill 4 axes at least the tip of the retreating mechanical pencil refill 3. It is desirable to configure it so that it can be extruded from above L. With this configuration, one cursive is arranged so as to extend substantially on the axis at all times, and the protruding strokes of the plurality of cursives are relatively short. As a result, the plurality of cursives are mutually extended. Even if there is a possibility of interference, the selected cursive can be smoothly projected from the tip.

Further, as shown in FIGS. 6 and 8, the guide member 51 is formed with a writing core supply path 51d capable of supplying the writing core W from the rear, which is a hole penetrating in the front-rear direction on the axis L. Is preferable. The writing core supply path 51d, the extension portion 522 on the axis of the holder 52, and the mechanical pencil refill 3 are arranged coaxially with the axis L. Further, the mechanical pencil refill 3 has a rear end opening capable of supplying the writing core W from the rear. With this configuration, the rear end opening of the mechanical pencil refill 3 can always be arranged on the axis L. In this case, for example, even when the ballpoint pen refill 4 is projected from the tip, the writing core feeding mechanism 40 and the writing core supply path 51d can be kept in communication at all times. Therefore, the writing core W can be constantly replenished to the mechanical pencil refill 3 from the rear of the writing instrument 1. In the present embodiment, when the rear shaft cap 33 and the eraser holder 31 are removed, an additional writing core W can be constantly replenished to the core tank 3a via the writing core supply path 51d regardless of the protruding state of the cursive. can. When the rear end opening of the mechanical pencil refill 3 is arranged on the axis L of the writing instrument 1, it is easy to replenish the writing core W from the rear of the writing instrument 1. In another embodiment, the rear end opening of the mechanical pencil refill arranged radially offset from the axis L is temporarily arranged on the axis L when the writing core is supplied from the rear of the writing instrument. It may be configured as follows.

As shown in FIG. 8, when the mechanical pencil refill 3 is most immersed, the rear end opening of the axial extension portion 522 of the holder 52 is on the front surface of the bottom portion of the holding cylinder portion 51a of the guide member 51. Since it is in close proximity or in contact, an additional writing lead W can be replenished most preferably.

In another embodiment, as in the modified example shown in FIG. 10, the axially extending portion 522-1 of the holder 52 may be configured to be inserted into the core tank 3a of the mechanical pencil refill 3. good. In this case, the mechanical pencil refill 3 can be held on the axis L so as to have elasticity in any different radial direction.

As described above, the present invention is not limited by the present embodiment and can be carried out in various forms. For example, in the present embodiment, the cursive mechanism 50, which is a cursive haunting mechanism, rotates the front shaft 20 and the rear shaft 30 relatively to select one cursive, but the writing tool 1 is not limited to this. Each cursive has a plurality of sliders connected via a holder, and at least a part of each of the sliders protrudes radially outward from the barrel, and one slider is manually projected forward for sliding operation. This makes it possible to use a writing tool equipped with a slide-type cursive haunting mechanism that allows one cursive to be selected and projected from the tip.

1 Writing tool 2 Axle cylinder 3 Sharp pencil refill 3a Core tank 4 Ball pen refill 4a Ball pen tip 4b Ink tank 6 Clip 6a Base 20 Tip shaft 21 Fitting cylinder 21a Abutment flange 25 Tip opening 30 Rear shaft 30a Caulking part 31 Eraser holder 32 Eraser 33 Rear axle cap 34 O-ring 35 Decorative ring 40 Writing core feeding mechanism 41 Chuck joint 41a Circular protrusion 42 Chuck 43 Middle cylinder member 44 Chuck ring 45 Chuck spring 46 Tip 47 Core breaker 50 Cam mechanism 51 Guide member 51a Holding cylinder Part 51b Guide part 51b1 Slide guide 51b2 Slide guide 51b3 Slide guide 51c Guide member Rotation support shaft 51c1 Shaft part 51c2 Collar 51d Writing core supply path 52 Holder 53 Holder 54 Rotating cam 54a Cam surface 54b Circular rib 55 Slider 55a Cam follower 56 Cam follower 57 Pressing spring 58 Joint 521 Holder body 522 Axis extension part 522-1 Axis extension part 522a Introduction part 553 Slider mounting axis L, LH Axis line W Writing core

Claims (3)

In a writing instrument that can project one of multiple cursives from the tip
Multiple sliders that are offset radially from the axis and can reciprocate in the axis direction,
A holder that connects the one cursive to one of the plurality of sliders so that one of the plurality of cursives extends substantially on the axis at all times .
It is equipped with a rotary cam that rotates in the circumferential direction about an axis and presses a slider to which one selected cursive of the plurality of sliders is connected so as to project forward .
A writing instrument characterized in that the other cursives among the plurality of cursives are arranged so as to be offset in the radial direction from the axis. The writing tool according to claim 1, wherein the holder has a radial extending portion extending in the radial direction. The holder connects the one cursive to the slider so that the other cursive has a predetermined elasticity that allows at least the tip of the one cursive to be pushed out from the axis. The writing instrument according to claim 2.

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