JP6564629B2 - Writing instrument - Google Patents

Description

  The present invention relates to a compound writing instrument in which a plurality of refills are accommodated in a shaft cylinder.

  Conventionally, as a dual-type writing instrument, a multi-colored ball-point pen refill and a knock bar located behind each of the multi-colored ball-point pen refills are provided. There has been provided a multicolor ballpoint pen (compound writing instrument) in which the refill writing tip protrudes from the tip of the shaft tube.

  Further, there is also provided a compound writing instrument in which any of the above-described multicolor ballpoint pens is replaced with a mechanical pencil refill in which a lead is drawn out by a reciprocating movement in the axial direction to add a mechanical pencil function.

  However, in the double-type writing instrument with the mechanical pencil function added, the knocking rod corresponding to the other ballpoint pen refill is advanced and the mechanical pencil mechanism is damaged when the mechanical pencil refill is retracted. There is a problem that the lead core in the mechanism breaks.

  In view of the above problem, in Patent Document 1 below, a buffer covering for reducing the impact on the spare core is formed on the entire inner peripheral surface of the portion where the spare core is accommodated in the core accommodating tube. A technique for preventing lead core breakage in the core housing tube is disclosed.

  Further, in Patent Document 2 below, a shock absorbing member is provided on the front end side of the knock portion to reduce the impact, and the knock rod corresponding to the refill moves backward when the refill is retracted. A technique for preventing lead core breakage in the mechanical pencil mechanism is disclosed.

Japanese Patent No. 4974654 Japanese Patent No. 4739593

  However, although the technique of the above-mentioned patent document 1 can prevent lead core breakage in the core housing tube, it cannot prevent lead core breakage in the mechanical pencil mechanism accompanying the retraction of the mechanical pencil refill.

  Moreover, in the technique of the above-mentioned patent document 2, although the lead core breakage in the mechanical pencil mechanism accompanying the retraction of the mechanical pencil refill can be prevented, the buffer member is provided between the knock bar and the rear end of the shaft cylinder. Therefore, it does not lead to an improvement in knock feeling. Therefore, such a knocking feeling cannot be said to be suitable for providing a dual-type writing instrument as a high-grade writing instrument, and it has been impossible to achieve both a functional aspect and a quality aspect.

  Therefore, the present invention provides a double-type writing instrument that prevents the lead core breakage in the mechanical pencil mechanism due to the retraction of the mechanical pencil refill, and has a knocking feeling with a profound feeling, and is excellent in terms of function and quality. This is the issue.

In order to solve the above problems, the present invention has the following configuration.
(First invention)
Of the present inventions, the first invention is a shaft tube 10, a plurality of refills including a mechanical pencil refill 90 housed in the shaft tube 10, and a knock bar located behind each of the plurality of refills. 40, and by sliding the knock bar 40 in the distal direction, the rewriting writing tip 91 corresponding to the knock bar 40 protrudes from the distal end of the shaft tube 10 in the double writing instrument 1, in which the knock bar 40 The distal end portion is provided with a pressing surface 42 for applying a pressing force in the distal direction, and a cushion member 50 is interposed between the pressing surface 42 and the rear end of the mechanical pencil refill 90. .
The “cushion member 50” is formed of a material having a hardness that can be elastically deformed by being pressed by the pressing surface.

(Second invention)
Among the present inventions, the second invention is a shaft cylinder 10, a plurality of refills including a mechanical pencil refill 90 housed in the shaft cylinder 10, and a knock bar located behind each of the plurality of refills. In the compound writing instrument 1 in which a refill writing tip 91 corresponding to the knock bar 40 protrudes from the tip of the shaft tube 10 by sliding the knock bar 40 in the tip direction, the knock bar 40 and The mechanical pencil refill 90 is separated from the front end portion of the knock bar 40, and is provided with a pressing surface 42 for applying a pressing force toward the front end, on the outer edge of the rear end of the mechanical pencil refill 90, A hook-shaped spring receiver 61 that contacts the spring 11 is provided, and a cushion member 50 is attached to the rear end of the mechanical pencil refill 90.

  “The knock bar 40 and the mechanical pencil refill 90 are separated” means that the knock bar 40 and the mechanical pencil refill 90 are not physically connected or connected and are separate members. Means that. Therefore, the mechanical pencil refill 90 is pushed forward by the knock bar 40 only when the pressing surface 42 comes into contact with the cushion member 50 as the knock bar 40 advances.

(Third invention)
In the third aspect of the present invention, a refill tail plug 60 is attached to the rear end of the mechanical pencil refill 90 in addition to the features of the second aspect of the present invention. The tail plug 60 is formed on the outer edge of the rear end.

(Fourth invention)
Of the present invention, the fourth invention is characterized in that, in addition to the features of the second and third inventions described above, the cushion member 50 includes a cushion member body 51 inserted into the mechanical pencil refill 90, and the cushion member. A cushion member flange 52 connected to the rear end of the body 51 and having a diameter larger than the inner diameter of the mechanical pencil refill 90, and the pressing surface 42 presses the cushion member 50. In the absence, a gap 12 is formed between the cushion member flange 52 and the spring receiver 61.

  “The cushion member flange 52 formed to have a larger diameter than the inner diameter of the mechanical pencil refill 90” means that the diameter is larger than the inner diameter of the mechanical pencil refill 90. Therefore, even when the cushion member body 51 is inserted into the mechanical pencil refill 90, the cushion member collar 52 protrudes from the mechanical pencil refill 90.

Since this invention is comprised as mentioned above, there exist the following effects.
In the dual-type writing instrument according to the present invention, a cushion member for relaxing the impact is disposed between the pressing surface and the rear end of the mechanical pencil refill.
Therefore, even when the mechanical pencil refill and the knock bar corresponding to the refill move forward and come into contact with the shaft cylinder as the other refill advances, the shock applied to the mechanical pencil mechanism is absorbed by the cushion member. Therefore, the lead core breakage in the mechanical pencil mechanism can be prevented.

In the dual writing instrument according to the present invention, the knock bar and the mechanical pencil refill are separated from each other, and the cushion member is attached to the rear end of the mechanical pencil refill.
Therefore, in order to draw out the lead core from the mechanical pencil refill, it is necessary to knock while squeezing the cushion member. As a result, when the knock bar is knocked, a soft and soft feel can be obtained. It is possible to provide a dual-type writing instrument excellent in function and quality in terms of feeling.

It is side surface sectional drawing (A) and the expanded sectional view (B) in the immersion state of the double-type writing instrument which concerns on embodiment of this invention. It is side surface sectional drawing (A) and the expanded sectional view (B) in the protrusion state of the compound writing instrument which concerns on embodiment of this invention. It is a perspective view (A) and (B) of a knock stick concerning an embodiment of the present invention.

Hereinafter, as a writing instrument according to an embodiment of the present invention, a double-type writing instrument 1 including a plurality of refills as a writing body is described as an example of the writing instrument according to the embodiment of the present invention. In the embodiment of the present invention, “front” of the dual writing instrument 1 and its component parts indicates the direction with the writing tip 91, and “rear” indicates the opposite direction.
Here, in the embodiment of the present invention, a state in which the refill protrudes from the dual writing instrument 1 is referred to as a “protruding state”, and a state in which the refill is accommodated in the dual writing instrument 1 is referred to as an “immersion state”.

(Overall structure)
As shown in FIG. 1 (A), the dual writing instrument 1 according to the embodiment of the present invention has a clip 70 at the rear end of the shaft cylinder 10 composed of the front shaft 20 and the rear shaft 30, that is, at the rear end of the rear shaft 30. A double writing instrument 1 having a structure in which the refill accommodated in the shaft cylinder 10 projects from the tip of the front shaft 20 in conjunction with the advancement of the knock projection 41 projecting from the rear end side surface of the rear shaft 30 while being attached. It is. At this time, the distal end portion of the clip 70 protrudes toward the shaft tube 10, and a double writing instrument 1 is formed by holding a pocket of clothing between the distal end portion of the clip 70 and the outer peripheral surface of the shaft tube 10. Can be held on clothes.

(Structure of shaft tube 10)
As shown in FIG. 1 (A), a shaft tube 10 according to an embodiment of the present invention has a cylindrical shape, a tip shaft 20 having a tapered tip, a cylindrical shape, and And a rear shaft 30 whose rear end is closed. Then, the shaft cylinder 10 according to the embodiment of the present invention screwes the front shaft male screw 21 formed at the rear end of the front shaft 20 and the rear shaft female screw 31 formed at the front end of the rear shaft 30. Can be assembled.

Here, the front end surface of the front shaft 20 is formed with a front end port 22 through which the refill that has reached the protruding state protrudes.
Further, a knock protrusion 41 formed at the rear end of the knock bar 40 protrudes from the rear end side surface of the rear shaft 30 to contribute to the refill protrusion. Then, by advancing the knock protrusion 41, the writing tip 91 of the mechanical pencil refill 90 to which the pressing force is applied from the knock bar 40 protrudes from the tip opening 22, and the mechanical pencil refill 90 moves to the protruding state.

  In the embodiment of the present invention, three refills are accommodated in the shaft tube 10, and a corresponding knock bar 40 is located behind each of the refills. A knock protrusion 41 protrudes from.

(Structure of mechanical pencil refill 90)
As shown in FIG. 1A, a refill according to an embodiment of the present invention includes a mechanical pencil refill 90 that can be written as a mechanical pencil, and a ballpoint refill 80 that can be written as a ballpoint pen. Although only two refills are visible on the drawing, in reality, a ball pen refill 80 different from the ball pen refill 80 on the drawing exists on the opposite side of the mechanical pencil refill 90.

  Here, the mechanical pencil refill 90 includes, in order from the front, a writing tip 91 for writing, a mechanical pencil mechanism 92 in which a lead lead (not shown) is accommodated, and a lead case 93 in which a spare lead is accommodated. .

  Further, as shown in FIG. 1B, a spring receiver 61 for utilizing the expansion and contraction action of the spring 11 is formed at the rear end of the mechanical pencil refill 90 so that the mechanical pencil refill 90 can be moved back and forth. A refill tail plug 60 is attached. The spring 11 is mounted so as to cover the outer periphery of the mechanical pencil refill 90 and to come into contact with the spring receiver 61. Further, a cushion member 50 is mounted in the refill tail plug 60.

(Structure of cushion member 50)
The cushion member 50 is formed of a material having a degree of hardness that can be elastically deformed by a load, a cushion member body 51 inserted into the mechanical pencil refill 90, and the cushion member body 51 A cushion member flange 52 connected to the rear end and formed larger in diameter than the inner diameter of the mechanical pencil refill 90 is provided.

  At this time, since the diameter of the cushion member collar portion 52 is formed to be larger than the inner diameter of the mechanical pencil refill 90, even when the cushion member body 51 is inserted into the mechanical pencil refill 90, the cushion member The collar portion 52 protrudes from the mechanical pencil refill 90. Further, the thickness (thickness) of the cushion member flange 52 is formed to such an extent that the pressing force is not immediately transmitted to the mechanical pencil refill 90 when the cushion member 50 is loaded.

  Here, as shown in FIG. 1B, when the cushion member 50 is attached to the refill tail plug 60, the tip portion is in contact with the inner bottom of the refill tail plug 60. Further, when the mechanical pencil refill 90 is in an immersive state, a gap 12 is formed between the cushion member collar 52 and the spring receiver 61. Therefore, when a load is applied to the cushion member 50, the gap 12 is also compressed by compressing the cushion member body 51, and then the cushion member collar 52 is elastically deformed.

(Structure of knock bar 40)
As shown in FIG. 3, the knock bar 40 according to the embodiment of the present invention includes a pressing surface 42 that presses the cushion member 50, and a knock protrusion 41 that partially protrudes from the rear end side surface of the rear shaft 30. Has been.
The knock bar 40 is slidably mounted in a longitudinal groove 32 (see FIG. 2A) formed in the rear shaft 30. When the knock protrusion 41 is advanced by a fingertip, the knock protrusion 41 is It is slidable along the longitudinal groove 32.

  Further, the knock bar 40 corresponding to the mechanical pencil refill 90 according to the embodiment of the present invention is separated from the mechanical pencil refill 90 described above, and the mechanical pencil refill 90 is pressed against the pressing surface 42 as the knock bar 40 advances. Will be pushed forward by the knock bar 40 for the first time by contacting the cushion member 50.

At this time, if any of the refills is in an immersive state, the knock protrusion 41 is locked to the rear end portion of the rear shaft 30 by the urging force of the spring 11.
Here, for the mechanical pencil refill 90, with the writing tip 91 protruding from the tip port 22, when the knock projection 41 is pressed forward, the chuck holding the lead core of the writing tip 91 opens, Lead lead is drawn out.

  When the mechanical pencil refill 90 is in the protruding state, the knock bar 40 supporting the mechanical pencil refill 90 is moved forward by moving the knock bar 40 associated with the ball pen refill 80 forward. The engagement with the shaft rib is released. As a result, the mechanical pencil refill 90 moves to the immersive state by the action of the spring 11. On the other hand, the ball-point pen refill 80 is brought into a projecting state when the knock bar 40 associated with the ball-point refill 80 is engaged with a rear shaft rib (not shown) formed in the rear shaft 30.

(Transition from immersive state to protruding state)
Hereinafter, a flow until the mechanical pencil refill 90 according to the embodiment of the present invention moves from the immersive state to the protruding state and returns to the immersive state again will be described.
(1) Change from immersive state to protruding state

FIG. 1A is a side sectional view showing an immersion state of the mechanical pencil refill 90.
When the knock projection 41 corresponding to the mechanical pencil refill 90 is advanced from this state, the pressing surface 42 first contacts the cushion member 50. Then, when the pressing force conducted in the cushion member 50 reaches the mechanical pencil refill 90, the knock bar 40 moves forward in the barrel 10 while pushing out the mechanical pencil refill 90 forward, so that the mechanical pencil refill from the distal end port 22 is achieved. 90 writing tips 91 protrude. As a result, the mechanical pencil refill 90 moves from the “immersion state” to the “projection state”.
(2) Change from protruding state to immersive state

  FIG. 2A is a side sectional view showing a protruding state of the mechanical pencil refill 90. When the knock protrusion 41 corresponding to the ballpoint pen refill 80 is advanced from this state, the knock bar 40 that supports the mechanical pencil refill 90 is released from engagement with a rear shaft rib (not shown) formed in the rear shaft 30, The mechanical pencil refill 90 is retracted by the action of the spring 11. Then, when the knock protrusion 41 comes into contact with the rear end portion of the rear shaft 30, the mechanical pencil refill 90 moves from the “projection state” to the “immersion state”. At this time, the impact at the time of contact between the knock bar 40 and the rear shaft 30 is difficult to be transmitted into the mechanical pencil mechanism 92 provided in the mechanical pencil refill 90. In other words, the impact at the time of contact between the knock bar 40 and the rear shaft 30 is absorbed by the cushion member 50 interposed between the pressing surface 42 and the rear end of the mechanical pencil refill 90. The impact can be mitigated. Therefore, damage to the lead wicks accommodated in the mechanical pencil mechanism 92 is small, and breakage of the wicks can be prevented.

(Operation and effect of the double-type writing instrument 1 according to the embodiment of the present invention)
Since the dual writing instrument 1 according to the embodiment of the present invention is configured as described above, the following operational effects can be obtained.
In the dual writing instrument 1 according to the present invention, a cushion member 50 for reducing an impact is disposed between the pressing surface 42 and the rear end of the mechanical pencil refill 90.
Therefore, even when the mechanical pencil refill 90 and the knock bar 40 corresponding to the rebounding of the other ballpoint pen refill 80 are moved backward and come into contact with the barrel 10, the shock applied to the mechanical pencil mechanism 92 is a cushion member. Therefore, the lead core breakage in the mechanical pencil mechanism 92 can be prevented.

In the dual writing instrument 1 according to the present invention, the knock bar 40 and the mechanical pencil refill 90 are separated from each other, and the cushion member 50 is attached to the rear end of the mechanical pencil refill 90.
Therefore, in order to draw out the lead core from the mechanical pencil refill 90, it is necessary to knock while squeezing the cushion member 50. As a result, when the knock bar 40 is knocked, the knocking rod 40 is soft and has a feeling of being pressed. Thus, it is possible to provide the dual writing instrument 1 that has a feeling of profoundness and is superior in terms of function and quality.

1 Double writing instrument
10 Shaft cylinder 11 Spring
12 gap
20 Axle 21 Axial male thread
22 Tip
30 Rear shaft 31 Rear shaft female thread
32 vertical groove
40 Knock stick 41 Knock protrusion
42 Press surface
50 Cushion member 51 Cushion member body
52 Cushion member buttock
60 Refill tail plug 61 Spring holder
70 clips
80 Ball Pen Refill 90 Mechanical Pencil Refill
91 Writing tips 92 Mechanical pencil mechanism
93 core case

Claims (4)

A barrel,
A plurality of refills including a mechanical pencil refill stored in the shaft tube;
A knock bar located behind each of the plurality of refills,
In the dual writing instrument in which the writing tip of the refill corresponding to the knocking rod protrudes from the tip of the barrel by sliding the knocking rod in the tip direction,
The tip portion of the knock bar is provided with a pressing surface for applying a pressing force in the tip direction,
A writing instrument, wherein a cushion member is interposed between the pressing surface and a rear end of the mechanical pencil refill. A barrel,
A plurality of refills including a mechanical pencil refill stored in the shaft tube;
A knock bar located behind each of the plurality of refills,
In the dual writing instrument in which the writing tip of the refill corresponding to the knocking rod protrudes from the tip of the barrel by sliding the knocking rod in the tip direction,
The knock bar and the mechanical pencil refill are separated,
The tip portion of the knock bar is provided with a pressing surface for applying a pressing force in the tip direction,
On the outer edge of the rear end of the mechanical pencil refill, a hook-shaped spring receiver that comes into contact with the spring is provided.
A writing instrument comprising a cushion member attached to a rear end of the mechanical pencil refill. A refill tail plug is attached to the rear end of the mechanical pencil refill,
The writing instrument according to claim 2, wherein the spring receiver is formed on a rear end outer edge of the refill tail plug. The cushion member includes a cushion member body portion inserted into the mechanical pencil refill, a cushion member body connected to a rear end of the cushion member body portion, and formed larger in diameter than the inner diameter of the mechanical pencil refill. Department and
The writing instrument according to claim 2 or 3, wherein a gap is formed between the cushion member collar and the spring receiver when the pressing surface does not press the cushion member.