JP2018158522A - Writing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a writing instrument smaller in size than conventional ones by being constituted of less number of parts than other writing instruments, as well as using a magnet to provides a different operational feeling than other writing instruments.SOLUTION: A writing instrument 1 is characterized: when a writing tip part 21 is not projected from a front shaft 11, a part of a button 50 presses a slider 40 in a direction opposite to an opening part to cause a first magnet 60 and a second magnet 61 to repulse each other; when the button 50 is made to slide forward, a pressing force by the part of the button 50 against the slider 40 is released to cause the second magnet 61 and the first magnet 60 to attract each other at a position immediately before the first magnet 60, thereby allowing the front shaft 11 to be projected from the writing tip part 21.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a writing instrument using a knock mechanism.

In recent years, with the change of the environment, the usage scenes of magnetic cards are decreasing as follows.
(1) Changes in train commuter passes Traditionally, magnetic cards have been used for many train commuter passes. This magnetic card may be unable to be used in the same place as the magnetic card because it may become unusable in the worst case due to the magnetic force generated by the magnet when the magnet is brought close to the magnetic card. there were.
However, with changes in the environment in recent years, IC cards have appeared as train commuter passes, and many people use IC card commuter passes instead of magnetic cards. This IC card is less susceptible to magnetic force than a magnetic card, so if it does not have extremely strong magnetism, even if it is close to the IC card, the IC chip included in the IC card will not be destroyed. It will not be disabled. Therefore, unlike a magnetic card, an IC card can be easily accommodated in the same place as a possession having magnetic force.

(2) Changes in point cards, etc. Conventionally, magnetic cards are also used for point cards used at specific stores. Therefore, the same problem as the above (1) has occurred.
However, with recent changes in the environment, IC cards have also appeared as point cards. With this point card using an IC card, it is possible to obtain information on the cardholder stored on the Internet by holding the card, and no information is stored in the point card itself. In recent years, point cards have been digitized such as presenting information displayed on electronic terminals such as mobile phones and smartphones using the Internet, and it has become possible not to carry point cards. For this reason, as in the case of (1), problems associated with carrying belongings with magnetic force have been reduced.

Due to these changes in the environment, there are fewer problems with storing possessions having magnetic force and other possessions containing commuter passes such as other periodic holders in the same bag. For this reason, taking a writing instrument and a regular entry that many people such as students and adults would have stored in the bag, even if a magnet is used for the writing instrument, if the commuter pass is an IC card, there is no problem. Can be stored in the same bag.
And about the writing instrument using a magnet, the technique is disclosed by the patent document shown below.

Japanese Utility Model Publication No. 63-161782 Japanese Utility Model Publication No. 6-45791 JP 2005-131892 A JP2015-112775A

  Therefore, the present invention provides a new operation feeling different from other writing instruments by using a magnet for the writing instrument, reduces the number of parts constituting the writing instrument compared to other writing instruments, and is smaller in size than conventional ones. It is an object to provide a writing instrument.

In order to solve the above problems, the present invention has the following configuration.
(First invention)
The writing instrument 1 according to the first aspect of the present invention is related to the back and forth movement of the refill 20 in the writing instrument 1 provided with the refill 20 including the writing tip protruding from the tip of the shaft tube 10, and the shaft tube 10. A button 50 for projecting and retracting the writing tip from the tip of the shaft, and a first magnet 60 having a magnetic flux fixed in the shaft tube 10 in the shaft tube 10 and a front and rear as the button 50 is operated. And a second magnet 61 having a magnetic flux that slides on the first magnet 60, and the magnetic flux density of the first magnet 60 and the second magnet 61 is 200 mT or more.

The writing instrument 1 according to the first aspect of the present invention has the above-described configuration, so that the following action is produced.
The writing instrument 1 according to the first aspect of the present invention uses at least two magnets in the shaft tube 10 and uses the repulsive force of the two magnets by setting the magnetic flux density of the magnets to 200 mT or more. You can get a writing instrument that can invade Refill 20.

(Second invention)
The writing instrument 1 according to the second invention of the present invention includes a shaft cylinder 10 having a front shaft 11 and a rear shaft 13, and a refill 20 including a writing tip 21 protruding from the front end of the front shaft 11. In the writing instrument 1, along the longitudinal direction so as to pass through the holder 30 accommodated in the vicinity of the rear end of the rear shaft 13, and the rear shaft 13 and the holder 30 accommodated in the rear shaft 13. The formed openings (14, 31), the slider 40 accommodated in the holder 30 and connected to the rear end of the refill 20, and the opening (14 , 31) and a button 50 that is partially accommodated in the slider 40, and a first magnet 60 is provided at the rear end of the holder 30 in a direction that has polarity before and after the shaft tube 10. The slider 40 is mounted at the rear end thereof in the same polarity direction as the first magnet 60 and the first magnet 60 After the second magnet 61 is mounted at a position where the magnetic force is generated with the stone 60 and the writing tip 21 does not protrude from the tip shaft 11, the button 50 is slid forward together with the slider 40, and then the first The slider 40 is released from the button 50 by the repulsion between the first magnet 60 and the second magnet 61, and the slider 40 slides further, and the second magnet 61 attracts at the position of the front end surface of the first magnet 60. Thus, the writing tip 21 protrudes from the front shaft 11.

The writing instrument 1 according to the second aspect of the present invention has the above-described configuration, thereby producing the following action.
(1) In a state where the writing tip 21 does not protrude from the front shaft 11 (hereinafter referred to as “immersion state”), each magnet attracts by the magnetic force generated between the first magnet 60 and the second magnet 61, The second magnet 61 is about to move in the direction of the opening (14, 31), that is, in the outer peripheral direction of the axis, but a part of the button 50 moves the slider 40 in the direction opposite to the opening (14, 31), that is, in the direction of the axis. Since the force pressing in the central direction is stronger than the magnetic force, the second magnet 61 does not move.

  (2) When the button 50 is slid forward in the immersed state, the second magnet 61 provided on the slider 40 also slides together and attracts the first magnet 60 arranged in the direction of the opening (14, 31). Position. Then, the first magnet 60 and the second magnet 61 repel each other so that the second magnet 61 moves forward in the shaft cylinder 10 and is positioned on the front end surface of the first magnet 60 so that it is connected to the slider 40. As a result of the refill 20 being moved forward in the shaft tube 10, a state where the writing tip 21 protrudes completely from the front shaft 11 (hereinafter referred to as “protruding state”) is maintained.

(Third invention)
The writing instrument 1 according to the third invention of the present invention includes a shaft cylinder 10 including a front shaft 11 and a rear shaft 13 and a refill 20 including a writing tip 21 protruding from the front end of the front shaft 11. In the writing instrument 1, a holder 30 accommodated in the vicinity of the rear end of the rear shaft 13, and a rear shaft opening 14 formed along the longitudinal direction through the outer peripheral surface and the inner surface of the rear shaft 13. A holder opening 31 formed along the longitudinal direction so as to penetrate the holder 30 at the same radial position as the rear shaft opening 14, and is accommodated in the holder 30, and the refill 20 Part of the slider 40 connected to the rear end and the refill 20 is moved forward and backward, and part of the rear shaft opening 14 and the holder opening 31 are housed and the part of the slider 40 is housed. And the button 50 protrudes outward from the rear shaft opening 14. A tongue projection 51, a button barrel 52 connected to the button projection 51 and housed in the rear shaft 13 and having a step 54 on the surface of the holder opening 31, and the button barrel A button insertion portion 53 connected to the portion 52 and accommodated in the slider 40, the rear end edge of the holder opening 31 is located behind the rear end edge of the rear shaft opening 14, The slider 40 is provided with a slider receiving groove 43 for receiving the button insertion portion 53 movably back and forth on a surface facing the rear shaft opening 14 and the holder opening 31, and the holder 30 A first magnet 60 is attached to the rear end of the shaft cylinder 10 in a direction having polarity before and after the shaft tube 10, and the rear end of the slider 40 has the same polarity as the first magnet 60. In addition, a second magnet 61 is mounted at a position where a magnetic force is generated with the first magnet 60, and the brush In a state where the tip 21 does not protrude from the front shaft 11, the stepped portion 54 of the button body 52 abuts on the rear end edge of the holder opening 31, and the button insertion portion 53 forms the slider receiving groove 43. As the first magnet 60 and the second magnet 61 are separated from each other by being pressed in the direction opposite to the rear shaft opening 14 side, the button body 51 slides forward as the button protrusion 51 slides forward. After the step 54 of the portion 52 and the rear edge of the holder opening 31 are separated, the button insertion portion 53 and the slider receiving groove 43 are both slid forward, and then the second magnet Since the 61 is located on the front end surface of the first magnet 60, the writing tip 21 protrudes from the front shaft 11.

The writing instrument 1 according to the third aspect of the present invention has the above-described configuration, thereby producing the following action.
(1) In the immersion state, the magnets attract each other due to the magnetic force generated between the first magnet 60 and the second magnet 61, and the second magnet 61 is about to move in the direction of the rear opening 14, but the button is inserted. The force by which the portion 53 presses the slider accommodating groove 43 in the direction opposite to the rear shaft opening 14 is stronger than the magnetic force. In the immersed state, the step portion 54 is in contact with the rear end edge of the holder opening 31 and the button body 52 is prevented from moving in the direction of the rear shaft opening 14. 61 does not move.

  (2) When the button protrusion 51 is slid forward in the immersion state, the step 54 and the rear edge of the holder opening 31 are separated from each other, and the slider insertion groove 43 is not pressed by the button insertion portion 53. Move up. As a result, a space corresponding to the thickness of the holder opening 31 is formed between the lower stage of the button body 52 and the inner peripheral surface of the rear shaft 13, so that the second magnet 61 moves in the direction of the rear shaft opening 14. Thus, it is possible to attract and repel the first magnet 60. As the button 50 slides forward, the second magnet 61 accommodated in the slider 40 moves forward in the shaft cylinder 10 and is positioned on the front end surface of the first magnet 60, and by the magnetic force of the second magnet 61. As the lower stage of the button body 52 slides in the direction of the front end edge of the rear shaft opening 14, the refill 20 connected to the slider 40 also moves forward in the shaft tube 10 and is in a protruding state.

Since this invention is comprised as mentioned above, there exist the following effects.
When the writing instrument according to the present invention is moved from the immersive state to the protruding state, the user can obtain a comfortable feeling of operation and a new feeling different from those of other knock-type writing instruments.
That is, the movement of the other knock-type writing instrument from the immersive state to the protruding state is achieved by knocking the writing instrument and advancing the knocking part connected to the refill in the shaft cylinder, so that the knocking part and other parts are engaged. By doing so, the protruding state is maintained. The process of engaging the knock component with another component is performed by knocking the knock component backward by a predetermined width after the knock member has overtaken the other component forward by a predetermined width. The part fits in place. For this reason, since the distance of the refill that is longer than the sliding length of the knock component can be ensured, a knock-type writing instrument having a short overall length can be provided.

  On the other hand, the movement of the writing instrument according to the present invention from the immersive state to the protruding state is caused by the second magnet that is advanced along the first magnet by the user attracting the first magnet by the magnetic force, so that the second magnet is integrated. It will be in place at the departure. Therefore, unlike the other knock-type writing instruments, the second magnet involved in the refill intrusion does not cause an excessive forward movement and can be placed in a single position, so that it is different from other conventional writing instruments. A feeling of movement and a new sensation can be obtained.

  Moreover, since the writing instrument which concerns on this invention has few components comprised compared with another knock type writing instrument, it can provide a small-sized writing instrument. That is, the parts involved in the appearance of the refill are mainly the two magnets of the first magnet and the second magnet, so there is no need to mount a knock mechanism like other knock type writing instruments. Therefore, the outer diameter of the shaft cylinder can be reduced, and a writing instrument having a smaller size than the conventional one can be provided.

It is a perspective view in the protrusion state of the writing instrument which concerns on this Embodiment. It is an exploded view of the components which comprise the writing instrument which concerns on this Embodiment. It is the perspective view (A) and sectional drawing (B) of the front shaft which concern on this Embodiment. It is the perspective view (A) and sectional drawing (B) of the rear axis | shaft which concern on this Embodiment. It is the perspective view (A), sectional drawing (B), and rear end enlarged view (C) of the holder which concerns on this Embodiment. It is the perspective view (A), sectional drawing (B), and rear end enlarged view (C) of the slider which concerns on this Embodiment. It is the perspective view (A) and sectional drawing (B) of the button which concern on this Embodiment. It is the figure which showed the movement from the immersion state to the protrusion state of the writing instrument which concerns on this Embodiment. It is the figure which showed the movement from the protrusion state of the writing instrument which concerns on this Embodiment to an immersion state.

  Hereinafter, as a writing instrument 1 according to the present embodiment, a writing instrument 1 having a writing tip 21 at the tip of the shaft tube 10 will be described as an example with reference to the drawings. In the present invention, “front” and “front end” of the writing instrument 1 and its component parts indicate directions provided with the writing front end 21, and “rear” and “rear end” indicate opposite directions. “Upper and lower” means an upward direction and a downward direction in each drawing. In addition, “repulsion” described here indicates a state in which the movement and operation of the part by the action of the magnet is necessary, and “attracting” means a state in which the movement of the part is stopped by the action of the magnet. Indicates.

(overall structure)
As shown in FIG. 1, the writing instrument 1 according to the present embodiment includes a shaft cylinder 10 provided with a front shaft 11 and a rear shaft 13, a refill 20 including a writing front end 21 protruding from the front end of the front shaft 11, It has an appearance including a button 50 that is involved in sliding back and forth of the refill 20 and a part of which projects from the rear shaft 13.
As shown in FIG. 2, the writing instrument 1 according to the present embodiment includes a holder 30 housed in the vicinity of the rear end of the rear shaft 13 in addition to the configuration shown in FIG. The slider 40 is connected to the rear end of the refill 20, the first magnet 60 is attached to the rear end of the holder 30 in the direction having polarity before and after the shaft 10, and the same polarity as the first magnet 60. And a first magnet 60 at the rear end of the slider 40 and a second magnet 61 mounted at a position where a magnetic force is generated.
Since the writing instrument 1 according to the present embodiment is a ballpoint pen, the refill 20 is the ballpoint pen refill 20, but the type of the refill 20 is not limited to this. That is, the writing instrument 1 can be a mechanical pencil, the refill 20 can be a mechanical pencil refill, the writing instrument 1 can be a marking pen, and the refill 20 can be a marking pen refill.

(Axis 11)
As shown in FIG. 3A, the front shaft 11 is a cylindrical part formed in a tapered shape from the rear end side to the front end side. Further, as shown in FIG. 3 (B), the front shaft 11 is formed with a front shaft male screw 12 for fixing to the rear shaft 13 at the rear end.

(Rear axle 13)
As shown in FIG. 4A, the rear shaft 13 is a cylindrical part, and a rear shaft opening 14 for accommodating the button 50 is formed near the center thereof. The opening length α of the rear shaft opening 14 shown in FIG. 4B is smaller than the opening length β of the holder opening 31 described later (see FIG. 5B).
Further, as shown in FIG. 4B, the rear shaft 13 has a rear shaft female screw 15 for fixing to the front shaft 11 at its tip, and the rear shaft female screw 15 and the front shaft male screw are formed. The front shaft 11 and the rear shaft 13 can be fixed by screwing 12 together.

(Holder 30)
As shown in FIG. 5A, the holder 30 is a cylindrical part that is accommodated in the vicinity of the rear end of the rear shaft 13, and a holder opening for accommodating the button 50 near the center thereof. 31 is formed. The opening length β of the holder opening 31 shown in FIG. 5B is larger than the opening length α of the rear shaft opening 14 as described above, and the holder 30 is placed in the rear shaft 13. When accommodated, the rear end edge of the holder opening 31 is positioned behind the rear end edge of the rear shaft opening 14.

  Moreover, the holder 30 has the 1st magnet accommodating part 32 as a space for mounting | wearing with the 1st magnet 60 at the rear end, as shown to FIG. 5 (B) and (C). The first magnet 60 is attached to the first magnet housing portion 32 in a direction having polarity before and after the shaft tube 10. In addition, since the width of the lower end edge of the first magnet housing portion 32 is formed to be smaller than the outer diameter of the first magnet 60, the first magnet 60 may be detached from the first magnet housing portion 32 by its own weight or magnetic force. Absent.

(Slider 40)
As shown in FIG. 6A, the slider 40 includes a slider insertion portion 42 connected to the rear end of the refill 20, a slider barrel 41 connected to the slider insertion portion 42, and the slider barrel 41. The slider housing groove 43 is formed near the center and houses the button 50 so as to be slidable back and forth. Moreover, the slider 40 has the 2nd magnet accommodating part 44 as a space for mounting | wearing with the 2nd magnet 61 in the rear end, as shown to FIG. 6 (B) and (C). Then, the second magnet 61 is mounted in the second magnet housing portion 44 in the same polarity direction as the first magnet 60. In a state where the first magnet 60 and the second magnet 61 are mounted, the first magnet 60 and the second magnet 61 are in a positional relationship in which a magnetic force is generated. Since the width of the upper edge of the second magnet housing portion 44 is smaller than the diameter of the second magnet 61, the second magnet 61 does not come off from the second magnet housing portion 44 due to magnetic force.

(Button 50)
As shown in FIGS. 7A and 7B, the button 50 is connected to the button protruding portion 51 protruding from the rear shaft opening 14 and the button protruding portion 51 and is accommodated in the rear shaft 13, In addition, a button body 52 having a stepped portion 54 on the surface on the holder opening 31 side, and a button insertion portion 53 connected to the button body 52 and housed in the slider housing groove 43 are provided. At this time, the button body 52 is formed in a two-stage structure of an upper stage and a lower stage with the step part 54 as a boundary.

(First magnet 60, second magnet 61)
The first magnet 60 and the second magnet 61 are permanent magnets that can ensure a knocking function for a long period of time. In particular, a small neodymium magnet that can solve the problem of being housed in a space-saving device such as a writing instrument and can obtain a strong magnetic force. It is desirable to use it. The material of the neodymium magnet is N-30, N-35, N-40, N-50 or the like, and the magnetic flux density at that time is at least 200 mT or more, preferably 300 to 500 mT. If it is less than 200 mT, a sufficient knock feeling cannot be obtained. If it is larger than 500 mT, a very large operation load is required when returning the knock operation, and therefore it is not suitable for use as a knock-type writing instrument. In addition, magnetic flux density can be calculated | required by measuring the maximum value of the surface of the 1st magnet 60 and the 2nd magnet 61 using a magnetic force measuring device (for example, Japan Electromagnetic Instrument Co., Ltd. GV-400T).
In the present embodiment, cylindrical neodymium magnets are used as the first magnet 60 and the second magnet 61, the first magnet 60 is used as the first magnet housing portion 32, and the second magnet 61 is used as the second magnet housing portion 44. Contained.

(Description of movement from immersive state to protruding state using FIG. 8)
Hereinafter, the process in which the writing instrument 1 according to the present embodiment transitions from the immersive state to the protruding state will be described with reference to FIG.
(1) FIG. 8A is a diagram showing an immersion state. In this immersed state, the magnets attract each other due to the magnetic force generated between the first magnet 60 and the second magnet 61, and the second magnet 61 is about to move in the direction of the rear shaft opening 14 (forward). The force by which the insertion portion 53 presses the slider accommodating groove 43 in the direction opposite to the rear shaft opening 14 (rearward) is stronger than the magnetic force. Further, in the immersed state, the stepped portion 54 is in contact with the rear end edge of the holder opening 31, and the button body 52 is prevented from moving in the direction of the rear shaft opening 14 (forward). For this reason, the second magnet 61 does not move in the direction of the rear shaft opening 14 (forward), and the immersion state where the writing tip 21 does not protrude from the front shaft 11 is maintained. Even if the step 54 and the rear end edge of the holder opening 31 do not contact each other, the immersive state can be maintained by the magnetic force generated between the first magnet 60 and the second magnet 61.

  (2) FIG. 8B is a diagram showing a state in which the button 50 is slid to the front edge of the rear shaft opening 14 and the holder opening 31 from the immersed state. In this state, the step portion 54 and the rear end edge of the holder opening 31 are separated from each other, so that the slider insertion groove 43 is not pressed by the button insertion portion 53. As a result, a space corresponding to the thickness of the holder opening 31 is formed between the lower stage of the button body 52 and the inner peripheral surface of the rear shaft 13. As the button 50 moves forward, the second magnet 61 moves to a position where it can be attracted to the first magnet 60, and the refill 20 connected to the slider 40 moves forward in the shaft tube 10 to write. A part of the tip 21 has moved to a position protruding from the front shaft 11.

  (3) FIG. 8C is a diagram showing a protruding state. In this projecting state, the first magnet 60 and the second magnet 61 repel each other so that the second magnet 61 moves forward in the shaft cylinder 10 and is positioned on the front end surface of the first magnet 60. The lower part of the button body 52 is moved in the outer peripheral direction of the rear shaft opening 14 so as to compress the space formed in the state (2) by the magnetic force of the head and comes into contact with the rear edge of the holder opening 31. Yes. As a result, the refill 20 connected to the slider 40 also advances in the shaft cylinder 10, and as a result, the writing tip 21 protrudes completely from the front shaft 11. That is, the writing instrument 1 according to the present embodiment cannot reach the protruding state only by the distance that the user slides the button 50 from the rear end edge to the front end edge of the rear shaft opening 14. In addition to the distance, the distance by which the second magnet 61 moves to the position immediately before the first magnet 60 due to the magnetic force can be combined to reach the protruding state. In addition, it is desirable to provide a clearance of 0.1 to 2.0 mm between the first magnet 60 and the second magnet 61 when the refill 20 is moved.

(Description of movement from immersive state to protruding state using FIG. 9)
Hereinafter, the process in which the writing instrument 1 according to the present embodiment transitions from the protruding state to the immersive state will be described with reference to FIG.
(1) FIG. 9A is a diagram showing a state in which the button 50 starts to move backward from the protruding state. In this state, the contact between the lower stage of the button body 52 and the rear end edge of the holder opening 31 is released, and accordingly, the contact between the first magnet 60 and the second magnet 61 is also released. ing.

  (2) FIG. 9B is a diagram showing a state in which the button 50 is slid from the leading edge of the rear shaft opening 14 to the trailing edge. In this state, the stepped portion 54 and the rear end edge of the holder opening 31 are in contact with each other. As the button 50 moves backward, the second magnet 61 also moves to a position where it can be attracted to the first magnet 60, and the refill 20 connected to the slider 40 also moves backward in the shaft tube 10 to write. A part of the tip 21 is immersed in the shaft cylinder 10.

  (3) FIG. 9C is a diagram showing an immersion state. In this immersed state, the first magnet 60 and the second magnet 61 attract each other so that the second magnet 61 moves backward in the shaft tube 10 and is positioned immediately after the first magnet 60. As a result, the refill 20 connected to the slider 40 also moves backward in the shaft cylinder 10, so that the writing tip 21 is completely immersed in the shaft cylinder 10. That is, the writing instrument 1 according to the present embodiment cannot reach the immersive state only by the distance that the user slides the button 50 from the front end edge of the rear shaft opening 14 to the rear end edge. In addition to the distance, the immersive state can be reached only when the distance by which the second magnet 61 moves to just after the first magnet 60 by the magnetic force is combined.

(Characteristics of writing instrument 1)
Since the writing instrument 1 according to the present embodiment is configured as described above, the following effects can be obtained.
When the writing instrument 1 according to the present embodiment is changed from the immersive state to the protruding state, the user can obtain a comfortable operational feeling and a new feeling different from those of other knock-type writing instruments.
That is, the movement of the other knock-type writing instrument from the immersive state to the protruding state is achieved by knocking the writing instrument and advancing the knocking part connected to the refill in the shaft cylinder, so that the knocking part and other parts are engaged. By doing so, the protruding state is maintained. The process of engaging the knock component with another component is performed by knocking the knock component backward by a predetermined width after the knock member has overtaken the other component forward by a predetermined width. The part fits in place.

  On the other hand, the transition from the immersive state to the protruding state of the writing instrument 1 according to the present embodiment is that the second magnet 61 advanced by the user along the first magnet 60 attracts the first magnet 60 by the magnetic force. The second magnet 61 is placed in a fixed position in one shot. Accordingly, the second magnet 61 involved in the appearance of the refill 20 does not cause an excessive forward movement unlike other knock-type writing instruments, so that the second magnet 61 that fits in and out of the refill 20 is brought into place in one shot. A different comfortable feeling of movement and a new feeling can be obtained.

  In addition, since the writing instrument 1 according to the present embodiment has a smaller number of parts compared to other knock-type writing instruments, a small-sized writing instrument can be provided. That is, since the parts involved in the appearance of the refill 20 are mainly the two magnets of the first magnet 60 and the second magnet 61, it is not necessary to mount a knock mechanism like other knock type writing instruments. Therefore, the outer diameter of the shaft tube 10 can be reduced, and a writing instrument having a smaller size than the conventional one can be provided.

  Furthermore, the writing instrument 1 according to the present embodiment can ensure a movement amount that is approximately twice the distance that the user has slid the button 50. That is, the distance that the user slides the button 50 is added with the distance that the second magnet 61 moves against the first magnet 60, so that the shaft cylinder is about twice as long as the actual sliding distance. Parts in 10 are movable. For this reason, it is possible to provide a writing instrument having a different functionality from that of the conventional one and having a short overall length, giving the user a mysterious feeling, and increasing interest in the writing instrument 1.

1 Writing instrument
10 shaft cylinder 11 tip shaft
12 Front shaft male screw 13 Rear shaft
14 Rear shaft opening 15 Rear shaft female thread
20 Refill 21 Writing tip
30 Holder 31 Holder opening
32 First magnet housing
40 Slider 41 Slider body
42 Slider insertion part 43 Slider receiving groove
44 Second magnet housing
50 button 51 button protrusion
52 Button body 53 Button insert
54 steps
60 First magnet 61 Second magnet

Claims (3)

In a writing instrument with a refill that includes a writing tip that appears and disappears from the tip of the barrel,
Involved in the back-and-forth movement of the refill, comprising a button for projecting the writing tip from the tip of the shaft tube,
The shaft cylinder includes a first magnet having a magnetic flux fixed in the shaft cylinder, and a second magnet having a magnetic flux that slides back and forth in accordance with the operation of the button. A writing instrument, wherein the magnetic flux density of the second magnet is 200 mT or more. A cylinder with a front shaft and a rear shaft;
In a writing instrument comprising a refill including a writing tip that appears and disappears from the tip of the tip,
A holder accommodated in the vicinity of the rear end of the rear shaft;
An opening formed along the longitudinal direction so as to penetrate the rear shaft and the holder accommodated in the rear shaft;
A slider housed inside the holder and connected to the rear end of the refill;
Involved in the back and forth movement of the refill, comprising a button penetrating the opening and receiving a part of the slider.
A first magnet is attached to the rear end of the holder in a direction having polarity before and after the shaft tube,
A second magnet is attached to the rear end of the slider in the same polarity direction as the first magnet and at a position where a magnetic force is generated with the first magnet.
After the writing tip does not protrude from the front shaft, the button is slid forward together with the slider, and then the slider is released from the button due to repulsion between the first magnet and the second magnet. The writing tool, wherein the slider tip slides and the second magnet attracts at the position of the front end surface of the first magnet, whereby the writing tip protrudes from the front shaft. A cylinder with a front shaft and a rear shaft;
In a writing instrument comprising a refill including a writing tip that appears and disappears from the tip of the tip,
A holder accommodated in the vicinity of the rear end of the rear shaft;
A rear shaft opening formed along the longitudinal direction through the outer peripheral surface and the inner surface of the rear shaft;
A holder opening formed along the longitudinal direction so as to penetrate the holder at the same position in the radial direction as the rear shaft opening;
A slider housed inside the holder and connected to the rear end of the refill;
Involved in the back-and-forth movement of the refill, comprising a button partly accommodated in the rear shaft opening and the holder opening and partly accommodated in the slider,
The button includes a button protrusion projecting outward from the rear shaft opening, a button protrusion connected to the button protrusion and housed in the rear shaft, and a stepped portion on a surface of the holder opening. A button body having a button insertion part connected to the button body and housed in the slider;
The rear end edge of the holder opening is located behind the rear end edge of the rear shaft opening,
The slider is formed with a slider receiving groove on the surface facing the rear shaft opening and the holder opening for receiving the button insertion portion so as to be movable back and forth.
A first magnet is attached to the rear end of the holder in a direction having polarity before and after the shaft tube,
A second magnet is attached to the rear end of the slider in the same polarity direction as the first magnet and at a position where a magnetic force is generated with the first magnet.
In a state where the writing tip does not protrude from the front shaft, the step portion of the button body abuts against a rear edge of the holder opening, and the button insertion portion connects the slider receiving groove to the rear shaft opening. By pressing in the opposite direction to the side, the first magnet and the second magnet are separated from each other, and the stepped portion of the button body and the holder opening are moved as the button protrusion slides forward. The second magnet is positioned on the front end surface of the first magnet after the button insertion portion and the slider receiving groove are both slid forward by being separated from the rear end edge of the portion, The writing instrument, wherein the writing tip protrudes from the tip shaft.