JP5168901B2 - Rotating reel writing instrument - Google Patents

Description

  The present invention relates to a rotary feeding type writing instrument in which a writing body unit is arranged in a freely retractable manner on a shaft cylinder composed of a front shaft and a rear shaft that can relatively rotate, and a clip is attached to the rear shaft of the shaft cylinder. In addition, the present invention relates to a rotary feeding type writing instrument in which the clip is provided with releasing means for releasing the protruding state of the writing unit by the clip and bringing the writing unit into an immersive state.

It has a double-knock mechanism that pushes the tip of the ball-point pen body by pushing the knock bar protruding from the rear end of the shaft cylinder, and pushes the knock bar again to store the tip, and the engagement between the engaging ball of the clip and the rotor There is known a writing instrument having a safety mechanism that engages with a mating rib to hold the protruding state of the tip and is accommodated when the engaging ball of the clip is lifted.
When the clip is lifted by a pocket edge or the like, the engagement with the rotor is released and the chip is stored. This prevents contamination of the pockets due to the chips.
JP-A-9-118095.

However, if the pocket edge is thin or the clip's ball engagement mechanism is complex, the clip will not clip the pocket edge, i.e. the clip will not lift. There was a case. As a result, there is a risk that the tip of the chip comes into contact with the pocket and the pocket is seriously soiled.
In the rotary pay-out type writing instrument, the writing instrument of the barrel is divided into a front axis and a post-rotation axis, and the post-rotation axis is rotated so that the writing unit can be moved freely. . Therefore, by rotating the post-rotation shaft, the positions of the engagement balls of the clip formed on the post-rotation shaft and the engagement ribs of the rotor are shifted, and it is difficult to employ the safety mechanism as described above. there were.

The present invention relates to a rotary feeding type writing instrument in which a writing body unit is arranged to be able to appear and retract in a shaft cylinder composed of a relatively rotatable front shaft portion and rear shaft portion, and a feeding mechanism is arranged on the rear shaft portion. The rotary feeding-type writing instrument in which the clip is attached to the rear shaft portion, and the clip body unit is released from the protruding state by the clip, and is released into an immersive state. Is composed of a first spiral groove and a second spiral groove located behind the first spiral groove, and the payout mechanism can freely move back and forth only in the parallel direction with respect to the axis of the front shaft portion, further, the first boss loosely fitted in a helical groove formed in the rear shaft portion, brought forward the writing body unit by allowed to thereafter rotating the shaft, furthermore, protruding near the tip of the clip The clamping portion provided with, a spaced position and its clamping portion, the releasing means of said writing member unit disposed behind portion of the second spiral groove, engaging the releasing means to said second helical groove The gist is that it is detachable .

The present invention relates to a rotary feeding type writing instrument in which a writing body unit is arranged to be able to appear and retract in a shaft cylinder composed of a relatively rotatable front shaft portion and rear shaft portion, and a feeding mechanism is arranged on the rear shaft portion. The rotary feeding-type writing instrument in which the clip is attached to the rear shaft portion, and the clip body unit is released from the protruding state by the clip, and is released into an immersive state. Is composed of a first spiral groove and a second spiral groove located behind the first spiral groove, and the payout mechanism can freely move back and forth only in the parallel direction with respect to the axis of the front shaft portion, further, the first boss loosely fitted in a helical groove formed in the rear shaft portion, brought forward the writing body unit by allowed to thereafter rotating the shaft, furthermore, protruding near the tip of the clip The clamping portion provided with, a spaced position and its clamping portion, the releasing means of said writing member unit disposed behind portion of the second spiral groove, engaging the releasing means to said second helical groove Since the clip is detachably disposed , the clip is easily separated from the shaft tube, and the cursive unit is surely immersed in the shaft tube.

The components of the rotary payout writing instrument will be described. A writing instrument comprising a shaft cylinder 1, which is composed of a front shaft portion 2 and a rear shaft portion 3. The front shaft portion 2 includes a front front shaft 4 and a rear front shaft 5. A rear front shaft 5 is detachably fixed to the rear of the front front shaft 4 by means such as screwing, and an elastic rubber grip 6 is fitted on the outer periphery of the front front shaft 4. A rear rotating shaft 7 having a clip 16 is fitted behind the rear front shaft 5 as the rear shaft portion 3.
Further, the rear front shaft 5 has a concave portion 8 for fitting the post-rotation shaft 7, and the convex portion 9 into which the concave portion 8 of the rear front shaft 5 is fitted and fitted to the post-rotation shaft 7. Is formed, and has a fitting structure that can freely rotate. A positioning groove 11 for positioning the feeding cam shaft 10 in the rotational direction is formed inside the rear front shaft 5. A positioning rib 12 is formed on the feeding cam shaft 10 so as to be inserted into a positioning groove 11 formed on the rear front shaft 5 and to be loosely fitted.
The rear front shaft 5 and the feeding cam shaft 10 can freely move back and forth only in the parallel direction with respect to the axis 13 of the barrel 1 by the positioning groove 11 of the rear front shaft 5 and the positioning rib 12 of the feeding cam shaft 10. Yes.
The cursive unit 14 is disposed inside the shaft cylinder 1, and the rear end of the cursive unit 14 is in contact with the inner wall surface of the feeding cam shaft 10. The cursive unit 14 is urged rearward by a resilient member 15 such as a coil spring provided inside the front shaft portion 2 and the feeding cam shaft 10 is also directed rearward. Is energized.
The clip 16 is press-fitted and fixedly connected to the press-fitting hole 7 a of the post-rotation shaft 7. Further, a clamping part 18 in which a ball part 17 is formed is provided in the front part of the clip 16, and a clamping object 19 is sandwiched between the ball part 17 and the rear front shaft 5 or the rotation rear shaft 7. Thus, the sandwiched object 19 is sandwiched.

A first spiral groove 20 and a second spiral groove 21 are formed in the front and rear two stages on the outer periphery and rearward of the feeding cam shaft 10. A convex engagement receiving portion 24 that engages with an engagement protrusion 23 of the clip 16 to be described later is formed at the rearmost portion 22 of the second spiral groove 21 of the feeding cam shaft 10. On the other hand, a boss 25 that loosely fits with the first spiral groove 20 of the feeding camshaft 10 is formed inside the post-rotation shaft 7. In this example, the second spiral groove 21 is formed in order to facilitate the relative movement of the engagement protrusion 23 and the boss 25. However, this is not always necessary, and only the engagement receiving portion 24 is used. May be formed.
The engagement body 26 engaged with the rear portion of the clip 16 is engaged with an engagement receiving portion 24 formed at the rearmost portion 22 of the spiral groove 21 of the second spiral groove 21 of the feeding cam shaft 10. A mating protrusion 23 is formed, and a recess 23 a is formed at the tip of the engaging protrusion 23. The engaging protrusion 23 is formed at a substantially central portion of the engaging body 26 and is formed at a position separated from the ball portion 17 of the clamping portion 18. Further, a through-hole 27 is formed in the post-rotation shaft 7 so that the engagement protrusion 23 formed on the engaging body 26 of the clip 16 enters in a direction perpendicular to the axis 13 of the shaft tube 1. .

The configuration of the clip 16 will be described. The clip 16 includes a connecting portion 28 that is press-fitted and fixedly connected to the press-fitting hole 7a of the post-rotation shaft 7, a folded portion 29 that has elasticity and is bent in the direction of the front shaft portion 2, and a folded portion thereof. The clip engagement body 26 is engaged in the vicinity of 29, and the engagement protrusion 23 is interlocked with the clip engagement body 26. Further, a clip holding portion 18 for holding the holding object 19 is formed in the forward direction of the clip 16, and a ball portion 17 is formed in the vicinity of the tip of the clip holding portion 18.
The clip engaging protrusion 23 is a member of the clip 16 that extends from the rear shaft portion 3 in the same direction as the axial line 13 of the shaft tube 1 of the front shaft portion 2, and is formed on the engaging body 26. The ball portion 17 is formed with an arc portion 30 on the shaft cylinder 1 surface side in contact with the sandwiched object 19, and further inclines in the forward direction continuous with the arc portion 30, and in the backward direction continuous with the arc portion 30. A surface portion 32 is provided. Thereby, even if it is the pinching thing 19 which has a softness | flexibility, it can clamp smoothly, without being caught.

  In the clip 16, the folded portion 29 and the clip holding portion 18 are elastically deformed, so that the ball portion 17 of the clip 16 holds the holding object 19 with an elastic force. Therefore, the engaging body 26 of the clip 16 and the engaging protrusion 23 are polycarbonate, polyacetal, polyethylene terephthalate, methacryl, polypropylene, polystyrene, vinyl chloride, polyamide, acrylonitrile / butadiene / styrene, acrylonitrile / styrene, polyethylene, polystyrene, and the like. Preferably, the metal is spring steel, stainless steel for spring, carbon tool steel, cold rolled steel for spring, or the like. A composite of the resin material and the spring steel material may be used.

  The writing unit 14 in this embodiment is a ball-point pen body, and oil-based ink is housed inside the ball-point pen body, but water-based ink or the like may be used. The writing unit (ball-point pen) is composed of a pen tip 33 serving as a writing unit and a pipe-like refill 33a that is fixed behind the pen tip 33 and stores the oil-based ink. A mechanical pencil unit may be arranged instead of the ballpoint pen body. By the way, the mechanical pencil unit includes a lead tank that accommodates a plurality of leads, a chuck body that is fixed in front of the lead tank to grip and release the lead, a chuck ring that opens and closes the chuck body, and the chuck. It consists of a chuck spring that urges the body and core tank toward the rear.

Next, the immersion state of the cursive unit 14 will be described. The writing unit 14 is urged to the rear of the barrel 1 by the elastic member 15, and the feeding camshaft 10 abutted and engaged with the rear of the writing unit 14 is the first of the feeding camshaft 10. The spiral groove forefront portion 34 of the spiral groove wall 35 is engaged with the boss 25 of the post-rotation shaft 7. At this time, the feeding camshaft 10 is stopped and maintained at the rear end with respect to the shaft cylinder 1. The writing unit 14 abutting and engaging the front of the feeding camshaft 10 is also urged rearward by the resilient force of the resilient member 15.
Next, a state where the cursive unit 14 changes from the immersive state to the protruding state is shown. The cursive unit 14 urged rearward by the elastic member 15 is in an immersive state because the feeding camshaft 10 is stopped at the rearmost position. When the post-rotation shaft 7 is extended with respect to the front shaft portion 2 from this immersed state and rotated about the axis 13 of the shaft tube 1 toward the engagement receiving portion 24 of the camshaft 10, the post-rotation shaft 7 is formed. The formed boss 25 also rotates. As the boss 25 rotates, the feeding camshaft 10 moves to the front of the barrel 1 along the inclination of the first spiral groove wall 35 that is in contact with the boss 25. This is because the rear front shaft 5 and the feeding cam shaft 10 cannot rotate with respect to the rear front shaft 5 but can move back and forth. That is, the positioning rib 12 of the feeding cam shaft 10 is fitted in the positioning groove 11 of the rear front shaft 5.
When the feeding camshaft 10 has been moved forward, the engagement receiving portion 24 of the feeding camshaft 10 and the engaging projection 23 of the clip 16 are engaged. By this engagement, the feeding cam shaft 10 is maintained in a state where it is stopped at the foremost position, and the writing unit 14 abutting and engaging the front of the feeding cam shaft 10 also contracts the elastic member 15. the projected state Te.
Next, a process in which the cursive unit 14 is changed from the protruding state to the immersive state will be described. The post-rotation shaft 7 is rotated from the engagement receiving portion 24 of the feeding cam shaft 10 toward the frontmost portion 34 of the spiral groove about the axis 13 of the barrel 1 with respect to the front shaft portion 2. By the rotation of the post-rotation shaft 7, the engagement between the engagement protrusion 23 of the clip 16 connected to the post-rotation shaft 7 and the engagement receiving portion 24 of the feeding cam shaft 10 is released and released. More specifically, as the post-rotation shaft 7 rotates, the pay-out cam shaft 10 relatively moves along the inclination of the first spiral groove wall 35 of the pay-out cam shaft 10 that is in contact with the boss 25. When the boss 25 and the spiral groove frontmost portion 34 of the spiral groove portion 37 of the pay-out cam shaft 10 are kept engaged with each other, the pay-out cam shaft 10 stops at the rear end with respect to the shaft tube 1. Maintain that state. As the feeding camshaft 10 moves backward, the writing unit 14 that is in contact with and engaged in front of the feeding camshaft 10 is also moved backward by the urging force of the elastic member 15 to be in an immersive state.

  A state in which the clamping portion 18 of the clip 16 is urged in a direction perpendicular to the axial line 13 of the shaft cylinder 1 and the ball portion 17 of the clip 16 and the outer peripheral surface 39 of the rear front shaft 5 are in contact with each other. 16 is referred to as “close”. In addition, the state in which the ball portion 17 of the clip 16 is separated from the axial line 13 of the shaft cylinder 1 in the vertical direction and separated from the outer peripheral surface 39 of the shaft 7 after rotation is referred to as “expanding”.

Next, the safety mechanism of the present embodiment will be described. In the safety mechanism, when a clamped object 19 such as a pocket of clothes is sandwiched between the post-rotation shaft 7 and the clip 16, the clip 16 expands, and the writing unit 14 changes from a protruding state to an immersive state. Mechanism. That is, when the clip 19 is clamped by the clip 16, the engagement between the engagement protrusion 23 of the clip 16 and the engagement receiving portion 24 of the feeding cam shaft 10 is released and released. The cursive unit 14 is in an immersive state by the release.
Next, details of the safety mechanism will be described. As described above, when the engagement receiving portion 24 of the feeding cam shaft 10 is engaged with the clip engagement protrusion 23, the protruding state of the writing unit 14 is maintained.
The expanding operation of the clip 16 is performed by sandwiching a sandwiched object 19 between the clamping portion 18 of the clip 16 and the rear front shaft 5 or the rotated rear shaft 7. The 16 engagement protrusions 23 are separated from the engagement receiving portion 24 of the feeding camshaft 10 and the engagement is released. By releasing the engagement, the feeding camshaft 10 is retracted by the elastic member 15 that urges the writing unit 14 backward, and the writing unit 14 is also pushed up backward. At this time, the post-rotation shaft 7 is moved along the inclined surface of the first spiral groove wall 35 by the boss 25 of the post-rotation shaft 7 loosely fitted with the first spiral groove 20 of the feed cam shaft 10. It rotates toward the spiral groove frontmost part 34 of the ten spiral groove parts 37. Along with this rotation operation, the feeding camshaft 10 that can only move back and forth with respect to the barrel 1 moves rearward, and the cursive unit 14 is in an immersive state.

Other engagement release means will be described. As described above, the clip engaging body 26 is engaged with the clip 16 and includes the clip engaging protrusion 23. The clip engaging body 26 has a surface portion 41 which becomes a fulcrum when the clamping portion 18 is opened, and the surface portion 41 is placed on the convex portion 42 of the post-rotation shaft 7. ing. That is, the rearmost part surface 40 of the clip engaging body 26 facing the shaft cylinder 1 can be expanded by pressing it in a direction perpendicular to the axis 13 of the shaft cylinder 1. .
Since the surface portion 41 serving as a fulcrum of the clip 16 is arranged behind the clip engaging protrusion 23, the rearmost portion surface 40 of the clip engaging body 26 is pressed in the vertical direction with respect to the axial line 13 of the shaft cylinder 1. As a result, the clamping portion 18 of the clip 16 is expanded, and the clip engagement projection 23 interlocked with the clip engagement body 26 is separated from the engagement receiving portion 24 of the feeding camshaft 10, and is engaged with the clip engagement projection 23. The engagement with the receiving part 24 is released.

A second example will be described. Although the release means of the cursive unit 14 is in the vicinity of the post-rotation shaft 51 disposed behind the shaft tube 50 and the connection portion 53 between the post-rotation shaft 51 and the clip 52, the connection portion 53 This is an example of arrangement at the rear 54. Descriptions of configurations, operations, and effects similar to those in the first example are omitted, and the same reference numerals are used in the drawings.
The components of the rotary payout writing instrument will be described. A writing instrument comprising a shaft cylinder 50, which is composed of the front shaft portion 2 and the rear shaft portion 55. The front shaft portion 2 includes a front front shaft 4 and the rear front shaft 5. A rear front shaft 5 is detachably fixed to the rear of the front front shaft 4 by means such as screwing, and an elastic rubber grip 6 is fitted on the outer periphery of the front front shaft 4. A rear rotating shaft 51 having a clip 52 is fitted as a rear shaft portion 55 behind the rear front shaft 5.
Further, the rear front shaft 5 has a concave portion 8 for fitting the post-rotation shaft 51. The rear shaft 51 is provided with a convex portion 56 for fitting with the rear front shaft 5, and is relatively It has a fitting structure that can be rotated. A positioning groove 11 for positioning the feeding cam shaft 10 in the rotational direction is formed inside the rear front shaft 5. A positioning rib 12 is formed on the feeding cam shaft 10 so as to be inserted into a positioning groove 11 formed on the rear front shaft 5 and to be loosely fitted. The rear front shaft 5 and the feeding cam shaft 10 can freely move back and forth only in the direction parallel to the axis 57 of the shaft cylinder 50 by the positioning groove 11 of the rear front shaft 5 and the positioning rib 12 of the feeding cam shaft 10. Yes.
The cursive unit 14 is disposed inside the shaft cylinder 50, and the rear end of the cursive unit 14 is in contact with and engaged with the inner wall surface portion of the feeding cam shaft 10. The cursive unit 14 is urged rearward by a resilient member 15 such as a coil spring provided inside the front shaft portion 2 and the feeding camshaft 10 is also urged rearward. I am letting. The clip 52 is connected to the outer peripheral surface of the post-rotation shaft 51 by hinge fitting. The clip 52 is provided with a clamping part 62 in which a ball part 61 is formed, and the clamping object 19 is sandwiched between the clamping part 62 and the shaft tube 50 so that the clamping object 19 is clamped. It has become.

A first spiral groove 20 and a second spiral groove 21 are formed in the front and rear two stages on the outer periphery and rearward of the feeding cam shaft 10. A convex engagement receiving portion 24 that engages with an engagement protrusion 58 of a clip 52 described later is formed on the rearmost portion 22 of the second spiral groove 21 of the feeding cam shaft 10. On the other hand, a boss 59 that loosely fits with the first spiral groove 20 of the feeding camshaft 10 is formed inside the post-rotation shaft 51. The clip 52 is formed with an engagement protrusion 58 that engages with the engagement receiving portion 24 formed at the rearmost portion 22 of the spiral groove 21 of the second spiral groove 21 of the feeding cam shaft 10. A concave portion 58a is formed at the front end portion. In addition, the post-rotation shaft 51 is formed with a through-hole 60 through which the engagement protrusion 58 of the clip 52 enters in a direction perpendicular to the axis 57 of the shaft tube 50.
The configuration of the clip 52 will be described. The ball 61 side of the clamping portion 62 of the clip 52 is referred to as the front of the clip 52. Further, the leaf spring portion 63 side from the connecting portion 53 between the clip 52 and the post-rotation shaft 51 is referred to as the rear.
The clip 52 forms a ball portion 61 in front of the clip holding portion 62, and a leaf spring portion 63 made of an elastic body is formed behind the connecting portion 53 between the clip 52 and the post-rotation shaft 51. . The leaf spring part 63 has a first connecting part 65, a first plate part 64, and a second connecting part 67 connecting the second plate part 66, which connect the clip 52 and the first plate part 64. Yes. The leaf spring 63 may be a single member or may be composed of a plurality of members. The ball portion 61 of the clip 52 has a shape that does not catch the pinched object 19. Specifically, the ball portion 61 has an arc portion 68 on the surface side of the shaft tube 1 in contact with the sandwiched object 19, a front inclined surface portion 69 in front of the arc portion 68, and a rear portion in connection with the arc portion 68. It has the back inclined surface part 70, and the said flexible clamping thing 19 can pass smoothly.

The clip 52 includes a connecting portion 53 that is hingedly fitted to the clip 52 behind the post-rotation shaft 51, a clamping portion 62, and a leaf spring portion 63 provided on the rear side. The urging force of the leaf spring part 63 is the clamping force of the front clamping part 62 of the clip 52 with the connecting part 53 as a fulcrum. In the present example, the leaf spring portion 63 is a plate-like object, but it may be elliptical or triangular. With the above configuration, when the leaf spring portion 63 provided at the rear of the clip 52 is extended, the front of the clip 52 is 57 on the axis line of the shaft tube 50 with the connecting portion 53 that is hingedly fitted. This action causes the holding portion 62 of the clip 52 to be closed.
When the leaf spring portion 63 provided at the rear of the clip 52 is contracted, the front of the clip 52 is on the axis 57 of the shaft cylinder 50 with the connecting portion 53 that is hingedly fitted as a fulcrum. Acting in a direction away from the clip 52, the clip portion 62 of the clip 52 is expanded.
For the clip 52, it is preferable to select a material rich in elastic deformation since the clamping portion 62 and the leaf spring portion 63 are elastically deformed. For example, as in the first example, the clip 52 is made of a resin material such as polycarbonate, polyacetal, polyethylene terephthalate, methacryl, polypropylene, polystyrene, vinyl chloride, polyamide, acrylonitrile / butadiene / styrene, acrylonitrile / styrene, polyethylene, or polystyrene. Preferably, it may be formed of a metal material such as a spring steel material, a spring stainless steel material, a carbon tool steel material, a spring cold rolled steel material, or a composite of the resin material and the spring steel material.
A convex portion 72 is formed on the side surface 71 of the second plate-like portion 66 in the leaf spring portion 63, and the direction of the clip engaging protrusion 58 of the second plate-like portion 66 is set with the convex portion 72 as a fulcrum. Be changed. A concave portion 73 on which the fulcrum of the convex portion 72 is placed is formed on the rear outer peripheral surface of the post-rotation shaft 51. The clip engaging protrusion 58 has the convex portion 72 as a fulcrum, and the direction of the clip engaging protrusion 58 can be freely changed to an axis 57 on the shaft cylinder 50 or a direction 74 away from the axis 57 of the shaft cylinder 50. Can be changed.
Further, the leaf spring part 63 is stretched between the clip 52 and the recessed part 73 of the post-rotation shaft 51, and is a recessed part on which the convex part 72 formed on the second plate-like part 66 is placed. 73 is operating in a telescopic manner. The clip engagement protrusion 58 is formed for the purpose of engaging with the engagement receiving portion 24 of the feeding cam shaft 10, and is formed on the leaf spring portion 63 of the clip 52.

Next, the immersion state of the cursive unit 14 will be described. The writing unit 14 is urged to the rear of the barrel 1 by the elastic member 15, and the feeding camshaft 10 abutted and engaged with the rear of the writing unit 14 is the first of the feeding camshaft 10. At the foremost portion 34 of the spiral groove wall 35 of the spiral groove wall 35, the boss 59 of the rear shaft 7 is engaged. At this time, the feeding camshaft 10 is stopped and maintained at the rear end with respect to the shaft cylinder 1. The writing unit 14 abutting and engaging the front of the feeding camshaft 10 is also urged rearward by the resilient force of the resilient member 15.
Next, a state where the cursive unit 14 changes from the immersive state to the protruding state is shown. The cursive unit 14 urged rearward by the elastic member 15 is in an immersive state because the feeding camshaft 10 is stopped at the rearmost position. When the post-rotation shaft 51 is extended with respect to the front shaft portion 2 from this immersive state and rotated about the axis 57 of the shaft tube 50 toward the engagement receiving portion 24 of the camshaft 10, The formed boss 59 also rotates. As the boss 59 rotates, the feeding camshaft 10 moves to the front of the shaft tube 50 along the inclination of the first spiral groove wall 35 that is in contact with the boss 59. This is because the rear front shaft 5 and the feeding cam shaft 10 cannot rotate with respect to the rear front shaft 5 but can move back and forth. That is, the positioning rib 12 of the feeding cam shaft 10 is fitted in the positioning groove 11 of the rear front shaft 5. When the extension cam shaft 10 is moved forward, the engagement receiving portion 24 of the extension cam shaft 10 and the engagement protrusion 58 of the clip 52 are engaged. By this engagement, the feeding cam shaft 10 is maintained in a state where it is stopped at the foremost position, and the writing unit 14 abutting and engaging the front of the feeding cam shaft 10 also contracts the elastic member 15. It will be in a protruding state.
Next, a process in which the cursive unit 14 is changed from the protruding state to the immersive state will be described. The post-rotation shaft 51 is rotated from the engagement receiving portion 24 of the feeding cam shaft 10 toward the frontmost portion 34 of the spiral groove about the axis 57 of the barrel 50 with respect to the front shaft portion 2. By the rotation of the post-rotation shaft 51, the engagement between the engagement projection 58 of the clip 52 connected to the post-rotation shaft 51 and the engagement projection 58 of the feeding cam shaft 10 is released and released. More specifically, as the post-rotation shaft 51 rotates, the pay-out cam shaft 10 moves relatively along the inclination of the first spiral groove wall 35 of the pay-out cam shaft 10 that is in contact with the boss 59. The feed camshaft 10 stops to the rear end with respect to the shaft tube 50 by moving to the rear only and maintaining the engagement of the boss 59 and the spiral groove frontmost portion 34 of the spiral groove portion 37 of the feed camshaft 10. Maintain that state. As the feeding camshaft 10 moves backward, the writing unit 14 that is in contact with and engaged in front of the feeding camshaft 10 is also moved backward by the urging force of the elastic member 15 to be in an immersive state.

Next, the safety mechanism of the present embodiment will be described. The safety mechanism means that when the holding object 19 such as a pocket of clothes is held between the post-rotation shaft 51 and the holding part 62 of the clip 52, the holding part 62 of the clip 52 expands, and the cursive unit 14 Is a mechanism that changes from a protruding state to an immersive state. That is, when the clip 19 is clamped by the clip 52, the engagement between the engagement projection 58 of the clip 52 and the engagement receiving portion 24 of the feeding cam shaft 10 is released and released. The cursive unit 14 is in an immersive state by the release.
Next, details of the safety mechanism will be described. As described above, when the engagement receiving portion 24 of the feeding cam shaft 10 is engaged with the engagement protrusion 58 of the clip 52, the protruding state of the writing unit 14 is maintained. The expanding operation of the holding portion 62 of the clip 52 is performed by holding the holding object 19 between the holding portion 62 of the clip 52 and the post-rotation shaft 51, and along with the expanding operation of the holding portion 62 of the clip 52. The engagement protrusion 58 of the clip 52 is separated from the engagement receiving portion 24 of the feeding camshaft 10 and the engagement is released. By releasing the engagement, the feeding camshaft 10 is retracted by the elastic member 15 that biases the writing unit 14 backward, and the writing unit 14 is also pushed up backward. At that time, the post-rotation shaft 51 is moved along the inclined surface of the first spiral groove wall 35 by the boss 59 of the post-rotation shaft 51 loosely fitted to the first spiral groove 20 of the feed cam shaft 10. It rotates toward the spiral groove frontmost part 34 of the ten spiral groove parts 37. Along with this rotation operation, the feeding camshaft 10 that can only move back and forth with respect to the barrel 1 moves rearward, and the cursive unit 14 is in an immersive state.
Next, the disengagement of the safety mechanism will be specifically described. As described above, when the engagement receiving portion 24 of the feeding cam shaft 10 is engaged with the engagement protrusion 58 of the clip 52, the writing unit 14 is in a protruding state. Here, when the holding portion 62 of the clip 52 is expanded, the leaf spring portion 63 contracts toward the axial line 57 of the shaft tube 50. By this contraction operation, the second plate-like portion 66 rotates with the convex portion 72 as a fulcrum. That is, the rear portion of the second plate-like portion 66 moves in the direction of the axis 57 of the shaft cylinder 50, while the front portion moves in a direction away from the axis 57 of the shaft cylinder 50. As a result, the engagement protrusion 58 of the clip 52 that has been oriented in the direction of the axis 57 of the cylinder shaft 50 is changed to a direction 74 away from the axis 57 of the axis cylinder 50 with the convex portion 72 as a fulcrum. The clip engagement protrusion 58 is released from the engagement receiving portion 24 of the feeding cam shaft 10 and the engagement is released.
By releasing this engagement, the feeding camshaft 10 is retracted by the resilient member 15 that urges the writing unit 14 backward, and the writing unit 14 is also pushed up backward. It becomes immersive. That is, the pen tip 33 and the like are immersed by expanding the holding portion 62 of the clip 52.

FIG. 1 is a schematic configuration diagram of a rotary pay-out writing instrument (first embodiment). The principal part enlarged view of FIG. FIG. 4 is an enlarged schematic view of a spiral cam shaft and a post-rotation shaft boss. The front side schematic diagram of a feeding cam shaft. The back side schematic diagram of a feeding cam shaft. The schematic diagram of the immersion state of a cursive unit, and the schematic diagram which showed the later rotation direction in order to make a cursive unit project. FIG. 7 is an operation development view of FIG. 6 (an example in which the cursive unit changes from the immersive state to the protruding state). The schematic diagram of the protrusion state of a cursive unit, and the schematic diagram which showed the rotation direction of the rear-shaft part in order to make a cursive unit immersive state. FIG. 9 is an operation development view of FIG. 8 (an example in which the cursive unit is changed from a protruding state to an immersive state). Schematic of the operation example which the protrusion state of a cursive unit will be in an immersive state by a safety cancellation | release mechanism. The principal part enlarged view of FIG. Schematic of the operation example which the protrusion state of a cursive unit will be in an immersive state by a safety cancellation | release mechanism. Schematic of the operation example which the protrusion state of a cursive unit will be in an immersive state by a safety cancellation | release mechanism. FIG. 14 is an operation development view of FIGS. 10 to 13 (an example of the operation of the boss and the feeding camshaft after the engagement receiving portion of the feeding camshaft and the clip engagement protrusion are disengaged). Schematic diagram of the structure of a rotary pay-out writing instrument (second embodiment). The schematic diagram of a clip (2nd Example). The schematic enlarged view of the example from which the engagement protrusion of a clip and the engagement receiving part of a feeding cam shaft are cancelled | released by pinching a clamping object in the clamping part of a clip.

DESCRIPTION OF SYMBOLS 1 Shaft cylinder 2 Front shaft part 3 Rear shaft part 4 Front front shaft 5 Rear front shaft 6 Rubber grip 7 Rotating rear shaft 7a Press-fitting hole 8 Concave part 9 Convex part 10 Feeding cam shaft 11 Positioning groove 12 Positioning rib 13 On axis 14 Cursive unit 15 impact member 16 clip 17 ball part 18 clamping part 19 clamping object 20 first spiral groove 21 second spiral groove 22 spiral groove rearmost part 23 engaging projection 23a recess 24 engagement receiving part 25 boss 26 engaging body 27 penetrating Hole 28 Connecting portion 29 Folding portion 30 Arc portion 31 Front inclined surface portion 32 Back inclined surface portion 33 Pen tip 33a Refill 34 Spiral groove frontmost portion 35 First spiral groove wall 37 Spiral groove portion 39 Outer peripheral surface 40 Rear 41 Projection portion 42 Protrusion portion 50 Shaft cylinder 51 Rotating shaft 52 Clip 53 Connecting portion 54 Rear 55 Rear shaft portion 56 Protruding portion 57 Axis 58 Engaging projection 58a Recessing portion 59 Boss 60 Through hole 61 Ball portion 62 Holding portion 3 the plate spring portion 64 first plate portion 65 first connecting portion 66 second plate-shaped portion 67 a second connecting portion 68 arc portion 69 forwardly inclined surface 70 rearwardly inclined surface 71 side 72 projection 73 recess 74 direction 75 the outer peripheral surface

Claims (2)

A rotary feeding type writing instrument in which a writing body unit is arranged so as to be able to appear and retract in a shaft cylinder composed of a front shaft portion and a rear shaft portion that can relatively rotate, and a feeding mechanism is arranged on the rear shaft portion, In the rotary feeding type writing instrument in which the clip is attached to the rear shaft portion, and the clip unit is released from the projecting state by the clip and the release unit is set in the immersive state. The feeding mechanism is configured to freely move back and forth only in the parallel direction with respect to the axis of the front shaft portion, and the second spiral groove located behind the first spiral groove . a boss loosely fitted into a spiral groove formed in the rear shaft portion, then the shaft portion caused to advance the writing body unit by for rotating the further pinching portion protruding near the tip of the clip With kicking, its a clamping portion and a position spaced, said releasing means of said writing member unit disposed behind portion of the second spiral groove, the releasing means disengageably with respect to the second helical groove A rotary pay-out writing instrument characterized by being arranged . 2. The rotary feeding type writing instrument according to claim 1, wherein the releasing means is provided in the vicinity of a connecting portion between the shaft cylinder and the clip.

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