JP4768337B2 - Double-headed padding writing instrument - Google Patents

Description

  The present invention relates to a double-headed batting type writing instrument in which ink impregnated in the batting in a shaft tube is guided to a writing portion on both ends of the shaft tube.

Conventionally, this type of writing instrument has a writing portion at both ends of the shaft tube as described in Patent Document 1, and two shafts arranged in the axial direction (ink storage) in the shaft tube (4). There is a body 2, 2), and a partition wall (partition wall 7) is used for partitioning these paddings so that ink impregnated in each padding is guided to the corresponding writing section.
According to this writing instrument, if two paddings are impregnated with inks of different colors, inks of different colors can be discharged from both writing instruments, and the two paddings are partitioned by a partition wall. , It is possible to prevent the mixture of the one padding ink and the other padding ink from being mixed.

However, according to the prior art, the inner cylinder (7) integral with the partition wall (partition wall 7) is closely fitted to the inner peripheral surface of the shaft cylinder (4). The inner cylinder (7) and the partition wall (partition wall 7) are pushed into the shaft cylinder (4), and after aligning the inner cylinder (7) and the partition wall (partition wall 7), each batting (ink storage body) 2) was inserted, and it was necessary to fit a tip having a writing part.
Therefore, in the above structure, the assembling work is complicated, and in particular, it is difficult to align the partition wall (partition wall 7) to the substantially center side of the shaft tube (4), and a special dedicated jig is used. It took a lot of work.
If the partition wall (partition wall 7) is assembled with being shifted in the axial direction with respect to the set position, one batting (ink storage body 2) is compressed, resulting in manufacturing defects such as ink outflow. There is a fear.
No. 3-8472

  The present invention has been made in view of the above-described conventional circumstances, and a problem to be solved by the present invention is that it has a structure in which two fillings arranged in the axial direction are partitioned by a partition wall, and a double-head filling type writing instrument excellent in assemblability. Is to provide.

Means for solving the above-described problems include a shaft cylinder composed of a front shaft and a rear shaft, a writing portion provided at each of one end and the other end of the shaft tube, and an axial direction within the shaft tube. A double-head batting type writing instrument comprising two batting provided and a partitioning wall for partitioning between these battings, wherein the ink impregnated in each batting is guided to the corresponding writing part, wherein the partitioning wall comprises the shaft It has a gap over the entire length of the partition wall with the inner peripheral surface of the cylinder, and is arranged so as not to abut against both the front shaft and the rear shaft in the axial direction. It is provided so as to be movable on both sides in the axial direction, and is sandwiched between the ends of the two paddings with almost no gap, so that the position in the axial direction is determined, and the outer peripheral surface of the two paddings and the shaft tube A space having air is provided between the inner peripheral surface, and one batting is inserted into the partition wall. It consists of a cylindrical portion and a wall portion on one end side of the cylindrical portion, and is formed into a bottomed cylindrical shape having a chamfered inclined portion around the end surface of the wall portion, and on the inner peripheral surface of the cylindrical portion, A plurality of ribs extending in the axial direction so as to press the outer peripheral surface of the one batting are arranged at a predetermined interval in the circumferential direction, and the plurality of ribs communicate with the space, and the wall portion In the contact surface with the end portion of the one of the padding in the above, provided with a ventilation groove that is continuous in the radial direction and communicated between the ribs, Another vent groove that communicates continuously with the space in the radial direction is provided .

In the first embodiment, a shaft cylinder composed of a front shaft and a rear shaft, a writing part provided at each of one end and the other end of the shaft tube, and two axially disposed in the shaft tube. In the double-headed batting type writing instrument comprising two batting and a partition wall for partitioning these battings, the ink impregnated in each batting is guided to the corresponding writing section. It is formed so as to be movable in the direction, and is disposed so as to be sandwiched between two batting in the axial direction.
Here, “the partition wall is formed so as to be movable in the axial direction with respect to the shaft tube” specifically means that, for example, a gap is provided between the partition wall and the inner peripheral surface of the shaft tube. Thus, the partition wall may be configured to be movable in the axial direction within the shaft tube.

Further, in the second form , the front shaft or the rear shaft is formed in a length that exposes the other end side of the batting to the outside in a state in which one end side of the one batting is fitted, by inserting the other end of one of the filling that is formed on the fittable substantially bottomed cylindrical shape.

Further, in the third embodiment, the ink impregnated in the batting, Ru ink der containing pigment components.

Further, the fourth form includes a cap that covers the writing part at one end and the other end and is detachable from the shaft tube, and the cap has an air circulation groove continuous in the axial direction on the outer periphery thereof. The portion where the bottom surface of the air circulation groove intersects the tip end surface of the cap communicates the space between the air circulation groove and the cap on the axial side of the bottom surface of the air circulation groove. that having a air distribution auxiliary passage.

Since the said form is comprised as demonstrated above, there exists an effect as described below.
According to the first embodiment , since the partition wall is movable in the axial direction with respect to the shaft cylinder, it is easy to insert the partition wall into the shaft cylinder when the double-head batting type writing instrument is assembled. is there.
Moreover, since the partition wall inserted into the shaft cylinder is positioned by being sandwiched between two batting, positioning work using a special dedicated jig or the like is not required.
Therefore, it is possible to provide a double-headed padding writing instrument that is excellent in assemblability, in addition to having a structure in which two fillings arranged in the axial direction are partitioned by a partition wall.

Furthermore, according to the second embodiment , if one end of one batting is fitted to the front shaft or the rear shaft and the substantially bottomed cylindrical partition wall is fitted to the other end, the front shaft Alternatively, the rear shaft, the batting, and the partition wall form an integral assembly. Accordingly, in the subsequent work, the assembly may be connected to the rear shaft or the front shaft after inserting the other batting.
Therefore, it is possible to provide a double-headed batting type writing instrument that is further excellent in assembling.

Furthermore, according to the third embodiment , since the ink containing the pigment component is impregnated in each filling that is independent for each writing portion, the density of the writing line is reduced due to the unevenness of the ink component in the filling. It is possible to prevent poor writing such as drowning.
That is, if it is configured to have a writing part on both ends of a single batting, the ink pigment component settles and gathers in the opposite side of the writing part in the writing inside the batting when stored upward. Therefore, the writing line becomes thin during writing. On the other hand, when stored downward, the ink pigment component settles down and gathers on the writing side of the writing inside the batting, so the writing line becomes darker during writing and the ink flow is blocked by the collected pigment component. It is easy to be worried about writing.
However, according to this invention, since the length of each batting is shortened by providing the batting independently for every writing part, the malfunction by sedimentation of the above pigment components can be prevented.

Also, according to the fourth embodiment , even if an infant or the like swallows a cap and the cap gets caught in the airway of the infant or the like, air circulation is secured by the air circulation groove, and the infant or the like suffocates. Can be prevented. Moreover, even if the end of the air circulation groove abuts against the inner wall of the mouth of an infant or the like, the air circulation auxiliary passage can ensure air permeability and is excellent in safety .

Hereinafter, a particularly preferable specific example in the present embodiment will be described with reference to the drawings.
This double-head batting type writing instrument A includes a shaft cylinder 10 composed of a front shaft 11 and a rear shaft 12, writing sections 21 and 22 provided at one end and the other end of the shaft tube 10, and the shaft tube 10 Covers two paddings 31 and 32 disposed in the axial direction in the inside, a partition wall 40 that partitions between the paddings, and the writing parts 21 and 22 at one end and the other end, and is detachable from the shaft cylinder. The caps 51 and 52 are provided so that the ink impregnated in each batting 31 (or 32) is guided to the corresponding writing section 21 (or 22).

The shaft cylinder 10 is configured in a substantially long cylindrical shape by fitting and connecting a front shaft 11 and a rear shaft 12 longer than the front shaft 11 in the axial direction.
The front shaft 11 has one writing portion 21 inserted through the inner peripheral surface of the reduced diameter portion on the tip side thereof via a substantially cylindrical tip cover 11a.
On the inner peripheral surface of the front shaft 11 closer to the rear shaft 12 than the reduced diameter portion, a plurality of ribs 11b that press one batting 31 in the shaft centripetal direction are arranged at predetermined intervals over the circumferential direction. Has been.
Each rib 11b is extended in the axial direction so as to partially press one end side of the batting 31, and the end in the extending direction of the rib 11b is formed in an R chamfered shape so that the batting 31 can be easily inserted. Has been.

  Then, the front shaft 11 is inserted with one batting 31 from the rear side (cap 52 side in FIG. 1), and the batting 31 is fitted to the rib 11b, and the rear end side of the batting 31 is inserted. Projecting backward. The protruding amount of the batting 31 is appropriately set so that it can be inserted into a partition wall 40 described later.

The rear shaft 12 has the other writing portion 22 inserted through the inner peripheral surface of the reduced diameter portion on the distal end side (cap 52 side in FIG. 1) via a substantially cylindrical tip cover 12a.
On the inner peripheral surface of the rear shaft 12 on the front shaft 11 side (cap 51 side in FIG. 1) from the reduced diameter portion, a rib 12b that presses the other batting 32 in the shaft tube centripetal direction extends in the circumferential direction. A plurality of them are arranged at predetermined intervals.
Each rib 12b is extended in the axial direction so as to partially press one end side of the batting 32 in substantially the same manner as the rib 11b of the front shaft 11, and the end of the rib 12b in the extending direction It is formed in an R chamfered shape so that 32 can be easily inserted.

Each of the writing sections 21 and 22 may be configured to guide the ink impregnated in the batting 31 (or 32) to the tip by capillary force. It is formed in a substantially cannonball shape formed by converging fibers.
And one writing part 21 is a writing part for thick writing with an outer diameter larger than the other writing part 22, The base end side is penetrated inside the front end side of the front shaft 11, and the inside of the inside cotton 31 Press fit.
The other writing part 22 is a writing part for fine writing having an outer diameter smaller than that of the writing part 21, and the base end side is the inside of the front end side of the rear shaft 12 in the same manner as the writing part 21. And is press-fitted into the batting 32.

The fillings 32 and 33 are configured by accommodating a large number of synthetic fibers in a synthetic resin cylinder and impregnating them with ink.
An ink containing a pigment component is used as the ink impregnated in the fillings 32 and 33.
Then, one batting 32 and the other batting 33 are formed in substantially the same length in order to improve manufacturability, and according to a preferred example of the present embodiment, parts having the same configuration are used. Yes.

  In addition, according to this Embodiment, although the one side is made into the writing part 21 for thick writing, and the other end side is made into the writing part 22 for thin writing, the double-head batting type writing implement A is comprised. It is also possible to construct a two-color double-headed padding writing instrument by impregnating the padding 33 and the ink of different colors.

And the partition wall 40 is arrange | positioned so that it may be pinched | interposed between these batting 31,31 between the batting 31,31 of the said structure.
The partition wall 40 is formed in a substantially bottomed cylindrical shape including a cylindrical portion 41 and a wall portion 42 on one end side of the cylindrical portion 41.

The cylindrical portion 41 has an outer diameter smaller than the inner diameter of the rear shaft 12 and is formed to have an inner diameter into which the batting 31 can be inserted. On the inner circumferential surface thereof, a rib 41a that presses the outer circumferential surface of the batting 31 is provided. A plurality are arranged at predetermined intervals over the direction.
Each rib 41a extends in the axial direction so as to partially press one end side of the batting 31, and the end in the extending direction of the rib 11b is formed in an R chamfered shape so that the batting 31 can be easily inserted. Has been.

The wall portion 42 has a substantially disk shape having a diameter smaller than the inner peripheral surface of the rear shaft 12 and larger than the outer diameter of the batting 31, and is integrally formed with the cylinder portion 41.
Two substantially parallel ventilation grooves 42 a and 42 a (see FIGS. 2 and 3) are formed on the end surface of the wall portion 42 on the side of the batting 32.
Each ventilation groove 42 a is provided so as to be continuous in the radial direction of the wall portion 42, and communicates the space around the batting 32 with the inside of the batting 32. Therefore, according to the ventilation groove 42 a, the air around the batting 32 is introduced into the batting 32 as the ink in the batting 32 is consumed.
Further, in order to facilitate the operation of inserting the partition wall 40 into the rear shaft 12 around the end surface of the wall portion 42 on the batting 32 side, a chamfered or R chamfered inclined portion 42c is formed. .

Moreover, one ventilation groove 42b (refer FIG. 2) is formed in the end surface at the side of the batting 31 of the wall part 42. As shown in FIG.
The ventilation groove 42 b is configured in substantially the same manner as the ventilation groove 42 a, and introduces air around the filling 31 into the filling 31 as the ink in the filling 31 is consumed.

  The cap 51 is a substantially bottomed cylindrical member that covers the writing portion 21 for bold writing and is detachably fitted to the tip side portion of the front shaft 11. The clip part 51a which enables mounting | wearing with respect to is formed.

Further, the cap 52 is a substantially bottomed cylindrical member that covers the writing portion 22 for fine writing and is detachably fitted to the tip side portion of the rear shaft 12 (see FIG. 5).
The cap 52 has a plurality of air circulation grooves 52a that communicate with each other in the axial direction on the outer periphery of the cap 52 and penetrates forward. These air flow grooves 52a ensure that air flows and prevents the infant from suffocating if the cap 52 is swallowed by an infant or the like and caught in the airway of the infant or the like. Is.

The cap 52 may be replaced with a cap 52 ′ shown in FIG. 6A or a cap 52 ″ shown in FIG. 6B in order to improve safety.
Each of these caps 52 ′ and 52 ″ has a bottom surface of the air circulation groove 52 a at a portion where the bottom surface of the air circulation groove 52 a intersects the tip surface of the cap 52 ′ (or 52 ″) with respect to the cap 52. An air circulation auxiliary passage 52a1 ′ (or 52a1 ″) that communicates between the air circulation groove 52a and the space on the farther side (right side in FIG. 6) than the cap 52 ′ (or 52 ″) on the axial center side. It is set as the structure equipped.

More specifically, the cap 52 ′ has an air flow by processing a portion where the bottom surface of each air flow groove 52 a intersects the tip surface of the cap 52 ′ into a C chamfered shape or an R chamfered shape. The auxiliary passage 52a1 ′ is secured (see FIG. 6A).
According to this configuration, even if the cap 52 ′ is accidentally swallowed by an infant or the like and the front end side of the air circulation groove 52 a comes into contact with the throat surface of the infant or the like, it is more axial than the bottom surface of the air circulation groove 52 a. On the side, the air flow groove 52a and the space ahead of the cap 52 'communicate with each other by the air flow auxiliary passage 52a1', so that air flow is ensured and suffocation of an accidentally swallowed infant or the like is prevented. it can.

Further, the cap 52 ″ includes a recess 52b in the approximate center of the tip end surface thereof, and the recess 52b and the bottom surface of each air circulation groove 52a are communicated with each other by an air circulation auxiliary passage 52a1 ″ (FIG. 6B). )reference).
Therefore, even in this configuration, even if the cap 52 ″ is accidentally swallowed by an infant or the like and the front end side of the air circulation groove 52a comes into contact with the throat surface of the infant or the like, the axis is more than the bottom surface of the air circulation groove 52a. Since the air flow groove 52a and the space ahead of the cap 52 ″ are communicated with each other by the air flow auxiliary passage 52a1 ″ on the heart side, air flow is ensured and suffocation of an accidentally swallowed infant or the like is prevented. Can do.

Next, an example of the assembly procedure of the double-headed pad writing instrument A having the above-described configuration will be described in detail.
First, the batting 32 is inserted into the rear shaft 12, and the leading end side of the batting 32 is held by the plurality of ribs 12b in the rear shaft 12 (see FIG. 4A).

  Further, a batting 31 is inserted into the front shaft 11, the leading end side of the batting 31 is held by a plurality of ribs 11 b in the front shaft 11, and a cylindrical portion 41 of the partition wall 40 is annularly formed on the rear end side of the batting 31. It is attached to. Since the partition wall 40 presses the rear end side of the batting 31 by the plurality of ribs 41a on the inner peripheral surface thereof, the partition wall 40 is immovable with respect to the rib 41a (see FIG. 4B).

And the front axis | shaft 11 provided with the batting 31 and the partition wall 40 and the rear axis | shaft 12 provided with the batting 32 are connected. At this time, the batting 31 and the partition wall 40 are inserted into the rear shaft 12, and the rear end side of the front shaft 11 is fitted to the inner peripheral surface of the rear shaft 12 (see FIG. 4C).
In the above process, since the partition wall 40 has a slight gap between the inner peripheral surface of the rear shaft 12, the partition wall 40 is smoothly inserted into the rear shaft 12 while being movable with respect to the rear shaft 12. By being sandwiched between 31 and 32, positioning is performed at the approximate center in the axial direction in the front shaft 11 and the rear shaft 12 (the state shown in FIG. 1 is obtained).

Thus, according to the above configuration and assembly procedure, the partition wall 40 can be easily positioned without using a jig or the like.
In addition, if the rear shaft 12 provided with the batting 32 and the front shaft 11 provided with the batting 31 and the partition wall 40 are respectively assembled and stored in advance, a large number of these assemblies are connected in the axial direction. Since it is good, its workability is good.

Of the procedures described above, the operation of assembling the batting 32 to the rear shaft 12 (see FIG. 4A) and the operation of assembling the batting 31 and the partition wall 40 to the front shaft 11 (FIG. 4B). Any one may be referred to as “reference”.
Further, the writing units 21 and 22 and the caps 51 and 52 are mounted on the corresponding front shaft 11 (or the rear shaft 12) before the above-described operation.

It is a longitudinal cross-sectional view which shows an example of the double-headed batting type writing instrument concerning this invention. It is an enlarged vertical sectional view which shows an example of a partition wall. It is a right view of a partition wall. It is sectional drawing which shows the assembly procedure of the both-heads batting type writing instrument, (a) shows the state which has inserted one batting into the back shaft, (b) has inserted the other batting into the front shaft, The state which has fitted the partition wall to the rear end is shown, (c) shows the state which is going to connect the assembled member of the front shaft side, and the member of the rear shaft side. It is a half sectional view showing the cap on the fine writing side in the double-headed batting type writing instrument. It is a half sectional view showing other examples of a cap in each of (a) and (b).

A: Double-head batting type writing instrument 10: Shaft cylinder 11: Front shaft 12: Rear shaft 21, 22: Writing section 31, 32: Filling 40: Partition wall 52, 52 ', 52 ": Cap 52a: Air circulation groove 52a1', 52a1 ": Air circulation auxiliary passage

Claims (1)

A shaft cylinder composed of a front shaft and a rear shaft, a writing portion provided at each of one end and the other end of the shaft tube, two fillings disposed in the axial direction in the shaft tube, and these fillings In the double-headed batting type writing instrument provided with a partition wall for partitioning between the inks, and guiding the ink impregnated in each batting to the corresponding writing part,
The partition wall has a gap extending over the entire length of the partition wall from the inner peripheral surface of the shaft cylinder, and is arranged so as not to contact both the front shaft and the rear shaft in the axial direction. in the barrel to provided so as to be movable in both sides in the axial direction and being sandwiched substantially without a gap between the ends of the two batting, axial position are determined,
Between the outer peripheral surface of the two batting and the inner peripheral surface of the shaft tube, a space having air is provided,
The partition wall comprises a cylindrical portion into which one batting is inserted and a wall portion on one end side of the cylindrical portion, and has a bottomed cylindrical shape having a C-chamfered inclined portion around the end surface of the wall portion. Forming,
A plurality of ribs extending in the axial direction so as to press the outer peripheral surface of the one batting are arranged on the inner peripheral surface of the cylindrical portion at a predetermined interval in the circumferential direction, and the gaps between the plurality of ribs are arranged. Communicating with the space,
A contact surface of the wall portion with the end portion of the one padding is provided with a ventilation groove that is continuous in the radial direction and communicated between the ribs, and a contact surface with the end portion of the other padding in the wall portion. The two- head batting type writing instrument provided with another ventilation groove that communicates with the space continuously in the radial direction .

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