JP2004209881A - Refill advance/retreat unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refill advance/retreat unit in which operations as a single component separated from a barrel can be checked and which can greatly improve the productivity of the telescopic type writing instrument. <P>SOLUTION: This refill advance/retreat unit is equipped with an advance/retreat mechanism for advancing/retreating a refill fitting part 33 axially by an operation of an operation part 20, in which the advance/retreat mechanism is integrally constructed to allow an independent operation and is formed attachably to the barrel 60 of the telescopic type writing instrument A. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refill retreat unit that can be attached to an incandescent writing instrument that causes a writing tip of a refill to protrude and retract.
[0002]
[Prior art]
Conventionally, in this type of invention, a knock body that can be knocked, a rotor that rotates by engaging a front end cam slope of the knock body or a cam slope of the inside of the barrel, and the like, are provided in the barrel. A return spring for urging the rotor rearward and a refill having a rear end fitted in the rotor are provided, and the knocker is knocked to advance the rotor in the axial direction. After that, there are many mechanisms that are rotated to a locked state, and the knocked body is knocked again to release the locked state and retreat the rotor in the axial direction.
[0003]
By the way, according to the related art, it takes time to assemble the complicated rotation mechanism having the above-described configuration, and there is a problem that the return spring is detached or deformed during the assembling operation. Therefore, in order to solve this problem, the return spring is incorporated in the rotor in advance, inserted into the cam cylinder together with the knock body, and attached to the shaft cylinder so that the return spring does not come off or deform during the assembly work. There is a knock-type writing instrument described in US Pat.
[0004]
However, according to the latter knock type writing instrument, the knock operation cannot be performed unless the return spring, the rotor, the knock body, the knock cover, the cam cylinder, the receiving seat, and the like are configured in the shaft cylinder. Was. Therefore, for example, after the completion of the assembly of the knock-type writing instrument, if an operation failure is found by an operation confirmation inspection, the completed knock-type writing instrument is completely discarded or disassembled and the defective part is discarded. In such a case, there is a problem that the trouble and the loss amount for disposal of the defective product are large.
Furthermore, although the knock type writing instrument is improved in terms of assembling workability, it is difficult to manage various parts such as a return spring, a rotor, a knock body, a knock cover, a cam cylinder, a seat, and the like. Further improvement in assembly workability has been required.
[0005]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2002-240485
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and the problem is that the operation confirmation inspection can be performed in a single item separately from the barrel, and the productivity of the retractable writing instrument can be significantly increased. An object of the present invention is to provide a refill advance / retreat unit that can be improved.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problem, a first invention is a refill advance / retreat unit provided with an advance / retreat mechanism for axially moving a refill mounting section by operating an operation section, wherein the advance / retreat mechanism can be operated independently. It is characterized in that it has an integral structure and is mountable to a shaft cylinder of a retractable writing instrument.
[0008]
Here, the advancing / retracting mechanism may be any mechanism that advances or retreats the refill mounting portion in the axial direction by operating the operating portion. As a specific example, the operating portion is knocked. When operated, the refill mounting portion is advanced in the axial direction to be in the locked state, and the operating portion is knocked again to release the locked state and retreat the refill mounting portion in the axial direction. When the mechanism and the operation unit are rotated in a predetermined rotation direction, the refill mounting unit is advanced in the axial direction, and when the operation unit is rotated in the opposite direction, the refill mounting unit is moved in the axial direction. A reversing mechanism and other well-known advancing / retracting mechanisms are exemplified.
The refill advance / retreat unit includes a configuration using only the advance / retreat mechanism and a configuration including another member (for example, a clip or the like) in the advance / retreat mechanism.
Further, the refill mounting portion means a portion where a refill for a writing instrument such as a refill for a ballpoint pen or a refill for a mechanical pencil can be mounted.
Further, the retractable writing implement is a writing implement configured by assembling the refill advance / retreat unit, and means a writing implement in which the writing tip of the refill for the writing implement is protruded and retracted by the operation of the refill advance / retreat unit. I do.
Further, the above-mentioned shaft cylinder may be any as long as the refill can be protruded and retracted in the axial direction, and may be an integrally formed one or a member formed from a plurality of members such as a front shaft and a rear shaft. Including.
[0009]
Further, the second invention is characterized in that the advance / retreat mechanism is formed so as to be attachable to a rear end portion of the barrel in the retractable writing instrument.
[0010]
Further, in the third invention, the advance / retreat mechanism integrally includes an urging member for urging the refill mounting portion, and the advance / retreat mechanism is configured such that the operating portion is knocked to perform the attachment. The refill mounting portion is moved forward into the locked state against the urging by the biasing member, and the locked state is released by the knocking operation of the operating portion again to retreat the refill mounting portion. It is characterized by comprising.
[0011]
Further, the fourth invention is characterized in that the refill mounting portion is slidably disposed in the axial direction and has a middle piece which can be mounted on the rear end of the barrel of the retractable writing instrument, and a receiving member for receiving the biasing member. The receiving member is integrally provided, and is engaged with the middle piece so as to be slidable in the axial direction.
[0012]
Further, in the fifth invention, the advancing / retracting mechanism biases the rotor having the operating portion, the refill mounting portion, and the rotor rearward from the front side of the middle piece in the middle piece. The receiving member having the biasing member therein is configured to be inserted in order, and the operating portion is knocked, so that the rotor is rotated forward after being advanced in the axial direction. The operating portion is knocked again to release the locked state and retreat the rotor.The operating portion is a knocking body that is knocked from behind. In addition, it is characterized in that the rear end side of the refill is provided substantially over the entire length of the knock body.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The refill advance / retreat unit 1 includes an operation unit 20, a rotor 30 having a refill mounting portion 33, and a rotor 30 inside the intermediate piece 10 from the front side (the lower side in FIG. 1) of the intermediate piece 10. The receiving member 50 having the urging member 40 therein for urging backward is inserted in order.
[0014]
When the operating portion 20 is knocked, the rotator 30 is moved forward in the axial direction and then rotated to the locked state, and the operating portion 20 is knocked again. Thereby, the forward / backward mechanism for releasing the locked state and retreating the rotor 30 is configured as an integrated structure that can operate independently (see FIG. 1).
[0015]
Furthermore, the refill advance / retreat unit 1 is formed in a shape that can be attached to the rear end of the barrel 60 of the retractable writing implement A (see FIGS. 3 and 4).
[0016]
The intermediate piece 10 has a substantially stepped cylindrical shape including a front portion 11 inside the shaft cylinder 60 and a rear portion 12 protruding rearward of the coaxial cylinder 60.
[0017]
The front side portion 11 has an outer peripheral surface with an annular protrusion 11a for fitting over an annular protrusion 61 on the inner peripheral surface of the barrel 60, and a cutout 62 at the rear end of the barrel 60 (see FIG. 3). Is formed, and a plurality of protrusions 11b for engaging a receiving member 50 described later are formed on the inner peripheral surface in the circumferential direction.
[0018]
The rear portion 12 has an outer diameter that is slightly larger than the front portion 11. A support portion 12a for supporting the clip 70 of the retractable writing instrument A is provided on the outer peripheral surface in a range from the rear portion 12 to the front portion 11.
The clip 70 is attached to the support portion 12a by a substantially U-shaped leaf spring 71 in side view. The operation of attaching the clip 70 to the support portion 12a may be performed before or after the refill advance / retreat unit 1 is attached to the barrel 60.
[0019]
The inner piece 10 has a plurality of inner piece cam slopes 12c for slidingly contacting a rotor cam slope 31a1 of the rotor 30, which will be described later, on the inner peripheral surface thereof. A plurality of slide grooves 12b and 12b 'for guiding the projection 31a and the ridge 22 of the middle piece 10 in the axial direction are provided.
[0020]
The operating portion 20 is a knocking body that is knocked from behind and is formed in a substantially bottomed cylindrical shape having an open front end face and a closed rear end face, and has a rotor cam slope 31a1 of the rotor 30 on the front end face. An operating portion cam slope 21 is formed for sliding contact with. Further, a ridge 22 is formed on the outer peripheral surface of the operation portion 20 so as to be engaged with the slide grooves 12b and 12b 'of the intermediate piece 10.
The operation unit 20 is provided inside the intermediate piece 10 with its rear end protruding rearward, and is knocked from outside.
Further, a tubular portion 32 of the rotor 30 described later is provided inside the operation portion 20 over substantially the entire length thereof. Further, the rear end side of the refill 80 is provided inside the cylindrical portion 32 over substantially the entire length thereof.
[0021]
Specifically, the slide grooves 12b and 12b 'in the intermediate piece 10 are relatively deeply formed grooves 12b for guiding both the ridge 31a of the rotor 30 and the ridge 22 of the operating portion 20 in the axial direction. And a groove 12b 'formed to be relatively shallow so as to guide only the ridge 22 of the operating portion 20 in the axial direction. These two types of grooves 12b, 12b' are alternately arranged in the circumferential direction.
Each of the two types of grooves 12b and 12b 'is formed so that the operating portion 20 inserted through the front end opening of the middle piece 10 does not penetrate backward of the middle piece 10 so as to prevent the operation portion 20 from penetrating therethrough. And the rear end side in the groove is closed.
It is possible to omit the shallower slide groove 12b 'of the two types of grooves 12b, 12b', but in a preferred example of the present embodiment, the two types of grooves 12b, 12b ' By forming ', the assemblability when assembling the operation unit 20 into the middle piece 10 is improved. That is, if the shallower slide groove 12b 'is omitted, the ridge 22 of the operating portion 20 needs to be aligned with the deeper slide groove 12b. In the present embodiment, the protrusion 22 can be engaged with either of the grooves 12b and 12b ', thereby eliminating the troublesome assembly due to the alignment.
[0022]
The rotor 30 includes a cylindrical portion 32 and an engaging portion 31 integrally formed on the outer periphery of the cylindrical portion 32, and the rear end side of the cylindrical portion 32 is slidably inserted into the operation portion 20. Then, the front end side of the cylindrical portion 32 is slidably inserted into the receiving member 50.
Note that the cylindrical portion 32 and the engaging portion 31 may be configured separately, and in this case, the engaging portion 31 is engaged with the outer peripheral surface of the cylindrical portion 32 at least so as not to move forward. Just fine.
[0023]
The tubular portion 32 has, on its inner peripheral surface, a refill mounting portion 33 for holding the rear end side of the refill 80 of the retractable writing instrument A so as to be detachable therefrom. The rear end side is inserted.
Reference numeral 32a in the figure denotes a ventilation hole formed in the rear end surface of the cylindrical portion 32. The ventilation hole 32a is a hole for ensuring ventilation between the inside and the outside of the refill 80 mounted in the cylindrical portion 32. The inner diameter of the refill 80 is smaller than the outer diameter of the refill 80 so as not to penetrate the refill 80.
[0024]
The refill mounting portion 33 forms a plurality of vertical ribs on the inner peripheral surface of the cylindrical portion 32, and makes the protruding end surface of the vertical rib abut on the outer peripheral surface of the refill 80, thereby holding the refill 80 detachably. Other technical means may be used as long as the refill 80 can be mounted.
[0025]
In addition, the engagement portion 31 of the rotor 30 is provided with a ring portion 31b that can abut on a rear end surface (an upper end surface in FIG. 1) of the receiving member 50, which will be described later, and is disposed behind the ring portion 31b. A plurality of ridges 31a are formed to be engaged with the plurality of slide grooves 12b of the intermediate piece 10, and a rotor cam slope 31a1 is formed on the rear end surface of each ridge 31a.
[0026]
Further, the biasing member 40 is a compression spring according to a preferred example of the present embodiment, and the biasing member 40 is received by engaging a seating surface at one end thereof with a receiving member 50 to be described later, and a seating surface at the other end. The receiving member 50 is mounted inside the receiving member 50 in a state of being located inward (downward in FIG. 1) from the rear end surface.
When the urging member 40 is attached to the receiving member 50 and is engaged with the middle piece 10, the seat surface at the other end is brought into contact with the front end surface of the cylindrical portion 32 of the rotor 30. The rotor 30 is urged rearward by abutting.
[0027]
The receiving member 50 has a substantially cylindrical shape in which the urging member 40 is inserted from the rear end opening 53, and climbs over the plurality of protrusions 11b of the middle piece 10 on the rear end side of the outer peripheral surface thereof. An annular projection 51 for fitting is formed, and a portion of the outer peripheral surface further away from the annular projection 51 on the front end side of the dimension W2 than the annular projection 51 for making contact with the front end surface of the intermediate piece 10. A portion 52 is formed.
The front end opening 54 of the receiving member 50 has an inner diameter that allows the receiving member 50 to pass therethrough and does not allow the urging member 40 inserted through the rear end opening 53 to pass through.
On the inner side of the step 54a formed by the front end opening 54, a plurality of projections 55 are formed in the circumferential direction to fit the seating surface of the urging member 40 from the periphery thereof.
[0028]
Therefore, the urging member 40 inserted into the receiving member 50 is fixed by being received by the step portion 54a at the front end of the seating surface and fitted by the projection 55 from the periphery.
Therefore, since the urging member 40 does not easily come off from the receiving member 50, many components having the urging member 40 mounted in the receiving member 50 are contained in the same part case. Even when the biasing members 40 are not entangled with each other, component management is easy.
[0029]
In the receiving member 50, the dimension W2 between the two annular projections 51 and 52 is set wider than the dimension W1 between the front end surface of the middle piece 10 and the projection 11b.
Therefore, the receiving member 50 can slide in the axial direction by the difference between the dimension W2 and the dimension W1 with respect to the intermediate piece 10 in a state where the annular projection 51 is fitted over the projection 11b of the intermediate piece 10. It becomes.
Therefore, when a large number of receiving members 50 and the middle pieces 10 are produced, even if a dimensional variation occurs in one or both of the dimensions W1 and W2, the dimensional variation is absorbed by the sliding of the receiving member 50. Therefore, assembling of the receiving member 50 and the intermediate piece 10 can be ensured.
[0030]
Further, when the refill advance / retreat unit 1 is mounted on the annular projection 61 of the retractable writing instrument A, the axial dimension of the barrel 60 in the retractable writing instrument A varies, for example, the axial position of the annular projection 61. And the variation in the axial position of the step 63 for bringing the annular projection 52 of the receiving member 50 into contact with the receiving member 50 are absorbed by the sliding of the receiving member 50 (the sliding of the difference between the dimension W2 and the dimension W1). Assembling of the refill advance / retreat unit 1 and the shaft cylinder 60 can be ensured.
[0031]
Each of the members having the above-described configuration is configured such that the operating portion 20, the rotor 30, and the receiving member 50 having the biasing member 40 therein are efficiently arranged in the middle piece 10 from the front side of the middle piece 10. By being inserted in order, it constitutes an integral structure advance / retreat mechanism that can operate independently.
Next, a detailed description will be given of a mechanism (mechanism) in which the rotor 30 in the refill advance / retreat unit 1 moves forward and backward between the retracted position and the advanced position.
[0032]
In the retracted position, the rotor 30 urged rearward by the urging member 40 causes the protrusion 31 a to abut on the operation portion cam slope 21 of the operation portion 20, and the operation portion 20 moves the protrusion 22 a. Is brought into contact with the rear end face in the slide groove 12b (or 12b '), whereby the rearward movement of the rotor 30 and the operation unit 20 is restricted.
When the operation unit 20 moves forward by the knocking operation in a state where the rotor 30 is at the retracted position (see FIG. 2A), the rotor 30 resists the urging by the urging member 40 with the advance. And move forward.
The forward movement of the rotor 30 and the operation unit 20 is restricted by bringing the ring portion 31b of the rotor 30 into contact with the rear end surface of the receiving member 50.
In FIG. 2, an arrow indicated by a two-dot chain line indicates a direction in which the rotor 30 moves next.
[0033]
After the rotor 30 that has moved forward is disengaged from the slide groove 12b, the rotor cam slope 31a1 is slid on the operation section cam slope 21 while being biased rearward (upward in FIG. 2) by the biasing member 40. It rotates (see FIG. 2B).
[0034]
Further, the rotor 30 is rotated by sliding the rotor cam slope 31a1 on the intermediate piece cam slope 12c, and then locked between two adjacent rotor cam slopes 31a1 and 31a1, thereby setting the forward position. Maintain (see FIG. 2 (c)).
[0035]
Then, when the operating section 20 advances again by the knocking operation, the rotor 30 that advances with the advance releases the rotor cam slope 31a1 from the above-mentioned locked state, and moves the rotor cam slope 31a1 to the operating section cam slope. It rotates by sliding to 21 (see FIG. 2D).
Further, the rotor 30 continues to rotate by sliding the rotor cam slope 31a1 on the operation section cam slope 21, and then retreats by engaging the rotor cam slope 31a1 in the slide groove 12b, and returns to the original retreat position. (The state of FIG. 2A).
[0036]
Next, the retractable writing implement A to which the refill advance / retreat unit 1 having the above configuration is attached will be described (see FIGS. 3 and 4).
The retractable writing implement A is provided with a refill 80 slidably in an axial direction in a shaft cylinder 60 formed by screwing a front shaft 60a and a rear shaft 60b, and a writing tip of the refill 80 at the tip of the shaft cylinder 60. The front port 60c for allowing the part 81 to protrude and retract is screw-connected, and the refill advance / retreat unit 1 having the above configuration is fitted and connected to the rear end opening of the barrel 60.
[0037]
Further, a grip 60d for improving the grip feeling of the retractable writing implement A is fitted to the outer peripheral surface of the front shaft 60a.
A plurality of recesses 60d1 are formed in the circumferential direction on the outer peripheral surface of the grip 60d. The recess 60d1 improves the design of the retractable writing implement A, and facilitates checking the front-rear direction of the grip 60d when the retractable writing implement A is assembled.
[0038]
On the inner peripheral surface on the rear end side of the barrel 60, an annular projection 61 that fits over the annular projection 11a of the intermediate piece 10, a step 63 that makes the annular projection 52 of the receiving member 50 abut, and the like are provided. A notch 62 is formed on the peripheral wall at the rear end to engage the rotation preventing projection 11c of the intermediate piece 10.
[0039]
Thus, according to the retractable writing instrument A having the above-described configuration, the operation of assembling the advance / retreat mechanism to the barrel 60 is a very simple operation of fitting the previously assembled refill advance / retreat unit 1 to the barrel 60. can do.
The technical means for mounting the refill advance / retreat unit 1 to the barrel 60 is not limited to the above-described fitting structure. For example, the male means may be formed at the front portion 11 of the middle piece 10 while forming the male screw portion. The rotation preventing projection 11c may be omitted, and a female screw portion may be formed on the inner peripheral surface on the rear end side of the shaft cylinder 60, so that the middle piece 10 and the shaft cylinder 60 may be screw-connected.
[0040]
【The invention's effect】
The present invention is configured as described above, and has the following functions and effects.
According to the refill advance / retreat unit of the first invention, since the advance / retreat mechanism is configured as an integral structure that can be operated independently, even if the refill advance / retreat unit is separate from the shaft cylinder of the retractable writing instrument, In addition, it is possible to perform an operation confirmation inspection of the refill advance / retreat unit.
Therefore, for example, even if an operation failure is found by the operation confirmation inspection, only the relevant refill advance / retreat unit having the operation failure can be discarded, and a component other than the non-defective refill advance / retreat unit can be used as it is. The amount can be significantly reduced.
Moreover, since the refill advance / retreat unit uses the refill advance / retreat mechanism, which is the part requiring the longest time for assembling, as a single completed product separate from the shaft cylinder of the retractable writing instrument, Separately, by assembling and storing in advance, it is possible to easily manage parts in the retractable writing instrument.
Further, since the assembling operation of the retractable writing instrument can be a simple operation of mounting the refill advance / retreat unit on the barrel, the assembling by the automatic assembling machine can be easily performed, and the parts to be supplied to the automatic assembling machine are provided. In addition to reducing the number, the man-hour for assembling can be reduced, and the productivity of the retractable writing instrument can be greatly improved.
Further, the refill advance / retreat unit of the present invention is configured separately from a portion other than the refill advance / retreat unit in the retractable writing instrument. Therefore, it is possible to easily change the design of the barrel in the retractable writing instrument, change the name of the barrel in the retractable writing instrument, and change the specifications of parts other than the refill advance / retreat unit in the retractable writing instrument. .
[0041]
Furthermore, according to the second invention, since the refill advance / retreat unit is mounted on the rear end of the barrel of the retractable writing instrument, the mounting operation is further facilitated, and the refill can be operated on the retractable writing instrument. It can be performed by manipulating the rear end of the shaft cylinder having good properties.
[0042]
Furthermore, according to the third aspect, since the refill advance / retreat unit is provided with an urging member, which is difficult to manage and assemble to the barrel, compared to other components, the refill unit is integrated with the refill. Component management and productivity of the retractable writing implement to which the retreat unit is attached can be further improved.
That is, when the biasing member is, for example, a coil spring, it is liable to be entangled with other coil springs, to be easily bounced when dropped, to be easily detached or deformed during the assembly work, and to manage parts. According to the present invention, the assembling operation of the retractable writing instrument is performed by attaching the refill advance / retreat unit integrally provided with an urging member to the shaft cylinder. Therefore, the above-mentioned problem caused by the urging member alone can be reduced.
[0043]
Further, according to the fourth invention, even if one or both of the receiving member and the intermediate piece have a dimensional variation in the axial direction, the dimensional variation is absorbed by the sliding of the receiving member. Assembling with the middle piece can be ensured. In addition, when the refill advance / retreat unit is attached to the barrel of the retractable writing instrument, the axial dimension variation of the barrel of the retractable writing instrument is absorbed by the slide, so that the refill advance / retreat unit and the barrel Can be reliably assembled.
[0044]
Furthermore, according to the fifth invention, since the components in the middle piece are assembled in order from the same direction, assembly of the refill advance / retreat unit and easy assembly of the refill advance / retreat unit by the automatic assembler are facilitated. As a result, the productivity of the retractable writing implement provided with the refill advance / retreat unit can be further improved.
Moreover, when the refill is mounted on the refill mounting portion, the rear end of the refill is embedded substantially over the entire length of the knocking body projecting rearward, so that the dimension of the refill is relatively long to secure a large amount of ink. In addition, it is possible to shorten the total length of the retractable writing instrument to which the refill advance / retreat unit is attached.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing an example of a refill advance / retreat unit according to the present invention, showing a state in which a middle piece is cut in half, and showing a main part of a receiving member in a cutaway manner.
FIGS. 2A to 2D are development views sequentially showing a mechanism for moving a rotor forward and backward in the refill moving unit. FIGS.
FIG. 3 is a side view showing an example of a retractable writing instrument to which the refill advance / retreat unit is attached.
FIG. 4 is an enlarged sectional view showing a structure of a rear end side of the retractable writing instrument.
[Explanation of symbols]
10: Middle piece 20: Operation part 30: Rotor 32: Cylindrical part 33: Refill mounting part 40: Biasing member 50: Receiving member 60: Shaft cylinder A: Projecting writing instrument

Claims (5)

A refill advance / retreat unit provided with an advance / retreat mechanism for moving the refill mounting section in the axial direction by operating the operation section,
A refill advance / retreat unit characterized in that the advance / retreat mechanism is configured as an integral structure that can be operated independently, and is formed so as to be attachable to a shaft cylinder of a retractable writing instrument. 2. The refill advance / retreat unit according to claim 1, wherein the advance / retreat mechanism is formed so as to be attachable to a rear end portion of the barrel of the retractable writing instrument. The advance / retreat mechanism integrally includes an urging member for urging the refill mounting portion,
The advancing / retracting mechanism is configured such that when the operating portion is knocked, the refill mounting portion is advanced to a locked state against the urging by the urging member, and the operating portion is knocked again. The refill advance / retreat unit according to claim 1 or 2, wherein the lock state is released to retreat the refill mounting portion. The refill mounting portion is slidably disposed in the axial direction and has a middle piece that can be mounted on the rear end of the shaft barrel of the retractable writing instrument, and a receiving member that receives the biasing member, and is integrally provided with the receiving member.
The refill advance / retreat unit according to claim 3, wherein the receiving member is engaged with the middle piece so as to be slidable in the axial direction. The advancing / retracting mechanism includes the operating portion, the rotor having the refill mounting portion, and the urging member for urging the rotor rearward, from the front side of the intermediate piece, within the intermediate piece. The receiving member is configured to be inserted in order, and the operating portion is operated by knocking, so that the rotor is advanced in the axial direction and then rotated to the locked state, and the operation is performed. A part is knocked again, thereby releasing the locked state and retreating the rotor.
5. The refill reciprocating device according to claim 4, wherein the operating portion is a knocking member that is knocked from behind, and is configured so that the rear end side of the refill is present substantially over the entire length of the knocking member. unit.

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