JP2015136867A - Writing instrument and cushion mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a writing instrument and a cushion mechanism used for the writing instrument which can alleviate an impact at the time of writing by retracting a writing part, and arbitrarily adjust a load generated when the writing part is retracted.SOLUTION: A cushion mechanism 25 for supporting a writing body 11 for writing on paper, which is provided in a writing instrument 1 comprises: a guide cylinder 41 which is formed in a cylindrical shape and has a groove part 41e extending in an axial direction on the inner peripheral surface; adjustment means 42 which is supported rotatably to the guide cylinder 41 and has a guide part 42b in which an inclined plane 42c that inclines with respect to a circumferential direction is formed at a part of the guide cylinder 41; a first movable element 43 which is disposed inside the guide cylinder 41, engages with the groove part 41e, and has a guided part 43c with an end part in contact with the inclined plane 42c; a second movable element 44 for supporting the writing body 11, which is disposed inside the guide cylinder 41 so as to face the first movable element 43; and a biasing member 46 which is inserted to the guide cylinder 41 and supported by the first movable element 43 and the second movable element 44.

Description

  The present invention relates to a writing instrument such as a mechanical pencil or a ballpoint pen and a cushion mechanism used for the writing instrument.

  At present, a ballpoint pen in which a tip, which is a writing unit, appears and disappears from the tip by reciprocating a refill stored in an outer member as a writing instrument, and a mechanical pencil that projects a core from the writing unit are known.

  In such a writing instrument, ink or powder is adhered to the paper sheet by moving the outer member in a state where the writing part is in contact with the paper sheet and a predetermined writing pressure is applied to the writing part. Write on the leaves. Since the writing instrument performs writing with pressure applied in this way, an impact is applied to the user's hand during writing. For this reason, in the writing over a long time, there exists a problem that a user's finger | toe will be burdened.

  Therefore, a writing instrument is known that provides an elastic body such as a coil spring or a rubber member to retreat the writing part by a load applied to the writing part at the time of writing, relieve an impact at the time of writing, and reduce the writing pressure ( For example, see Patent Document 1).

JP 58-181697 A

  The writing instrument described above has the following problems. That is, there are individual differences in writing pressure, and there are individual differences in the degree of fatigue. For this reason, in the writing instrument provided with the elastic body described in Patent Document 1, the effect of reducing writing pressure and fatigue varies depending on the user. Also, if the elastic body is not elastic force suitable for the user, the load applied to the writing part does not properly retract the writing part, and depending on the user, the fatigue may increase and the usability of the writing tool is reduced. There is also a fear.

  Although it is conceivable to use an elastic body suitable for the user's writing pressure in advance, it is difficult to perform the work of selecting an elastic body suitable for the user's writing pressure and attaching it to the writing instrument for each user. .

  Then, providing the cushion mechanism used for the writing instrument which can relieve the impact at the time of writing by retreating a writing part, and can adjust arbitrarily the load which a writing part retreats, and a writing instrument. Objective.

  In order to solve the above problems and achieve the object, the writing instrument and cushion mechanism of the present invention are configured as follows.

  A writing instrument according to an aspect of the present invention includes a cylindrical outer member, a writing body accommodated in the outer member, and a guide tube that is formed in a cylindrical shape and has a groove portion extending in an axial direction on an inner peripheral surface. Adjusting means having a guide portion that is rotatably supported by the guide tube and formed with an inclined surface that is inclined with respect to the circumferential direction in a part of the guide tube, and is disposed in the guide tube and engages with the groove portion, And the 1st needle | mover which has the to-be-guided part which an edge part contact | abuts an inclined surface, the 2nd needle | mover which is arrange | positioned facing the said 1st needle | mover in the said guide cylinder, and supports the said writing body, A cushion mechanism including an urging member inserted into the guide tube and supported by the first movable element and the second movable element.

  A writing instrument according to an aspect of the present invention includes a cylindrical outer member, a writing body accommodated in the outer member, and a guide tube that is formed in a cylindrical shape and has a groove portion extending in an axial direction on an inner peripheral surface. A knock body having a guide portion that is rotatable in the guide tube and is fixed in the axial direction, and has an inclined surface that is inclined with respect to the circumferential direction at a part thereof, and is disposed in the guide tube, A first mover having a guided portion that engages with the groove and whose end abuts against the inclined surface, and is disposed in the guide cylinder so as to face the first mover and supports the writing body. A second movable element, and a cushion that is inserted into the guide cylinder and is supported by the first movable element and the second movable element, and is movable in the axial direction within the outer member. And a mechanism provided in the outer member and biasing the writing body and the cushion mechanism. A regulating means capable of regulating the movement of the writing body and the cushion mechanism biased by the second biasing member, and capable of releasing the regulation of the movement of the writing body and the cushion mechanism; Is provided.

  The cushion mechanism according to one aspect of the present invention is a cushion mechanism that is provided in a writing instrument and supports a writing body that writes on a paper sheet, is formed in a cylindrical shape, and extends in an axial direction on an inner peripheral surface. A guide tube having a groove portion, an adjustment means having a guide portion that is rotatably supported by the guide tube and has an inclined surface that is inclined with respect to the circumferential direction, and is disposed in the guide tube; A first mover having a guided portion that engages with the groove and whose end abuts against the inclined surface, and is disposed in the guide cylinder so as to face the first mover and supports the writing body And a biasing member inserted into the guide tube and supported by the first and second movers.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the writing instrument which can relieve | moderate the impact at the time of writing by retreating a writing part, and can adjust arbitrarily the load which a writing part retreats. .

Sectional drawing which shows the structure of the writing instrument which concerns on one Embodiment of this invention. Sectional drawing which shows the structure of the writing instrument. Sectional drawing which expands and shows the principal part structure of the writing instrument. Sectional drawing which expands and shows the principal part structure of the writing instrument. The side view which expands and shows the principal part structure of the writing instrument. Sectional drawing which shows operation | movement of the principal part structure at the time of use of the writing instrument. Explanatory drawing which expand | deploys and shows the principal part structure of the writing instrument.

(First embodiment)
Hereinafter, the writing instrument 1 which concerns on the 1st Embodiment of this invention is demonstrated using FIG. 1 thru | or FIG.
FIG. 1 is a cross-sectional view showing a configuration of a writing instrument 1 according to an embodiment of the present invention, FIG. 2 is a configuration of the writing instrument 1 and is a cross-sectional view showing a state in use, and FIG. Specifically, FIG. 4 is a cross-sectional view showing an enlarged configuration of the guide tube 41, FIG. 4 is a cross-sectional view showing a configuration of a knock body 42 used in the writing instrument 1, and FIG. FIG. 6 is a sectional view showing the operation of the cushion mechanism 25 of the writing instrument 1, and FIG. 7 is an explanatory view showing the construction of the principal part of the knock body 42, specifically, the construction of the guide part 42b. FIG.

  The writing instrument 1 is, for example, a knock ballpoint pen or a mechanical pencil. In the present embodiment, as shown in FIG. 1, the writing instrument 1 will be described using a knock-type ballpoint pen. The writing instrument 1 includes an outer shell member 10 formed in a cylindrical shape, a writing body 11, and a drive mechanism 12.

  The outer member 10 includes a shaft cylinder 21, a tip 22, a gripper 23, and a clip mechanism 24 having a cushion mechanism 25. The outer member 10 is formed so that the writing body 11 can be accommodated and the leading end of the writing body 11 can be protruded and immersed by a drive mechanism 12 that accommodates the writing body 11.

  The shaft cylinder 21 is formed of a resin material, and houses the writing body 11 and a part of the drive mechanism 12 therein. The shaft cylinder 21 is formed in a cylindrical shape having both ends opened. The shaft cylinder 21 is provided at one end, and an opening 21a through which a knock body 42, which will be described later, of the drive mechanism 12 is inserted so as to reciprocate, and a female provided at the other end and fastened to the tip 22. Screw part 21b.

  In addition, the shaft cylinder 21 is provided on the inner peripheral surface thereof, positions the drive mechanism 12 and restricts movement in the rotation direction, and a window portion 21d that exposes a part of the drive mechanism 12 to the outside. It is equipped with. The groove portion 21c is provided along the axial direction, and is formed to have a length that is at least equal to the moving distance of the drive mechanism 12.

  The window portion 21d is, for example, a rectangular opening formed in a part of the outer peripheral surface of the substantially central portion of the shaft tube 21. The longitudinal direction of the window portion 21 d is formed along the axial center direction of the shaft tube 21. The window portion 21d is formed such that its length in the longitudinal direction is longer than the amount of movement of a guide cylinder 41 described later of the drive mechanism 12.

  One end side of the large tip 22 is formed in a tapered shape as compared with the other end side, and is formed in a cylindrical shape having both ends opened. Note that one end side of the tip 22 forms the tip of the writing instrument 1.

  If demonstrating it concretely, the tip 22 will be provided with the front-end | tip part 22a and the insertion part 22b which inserted the gripper 23 and was formed so that support was possible. The tip 22 has a small hole 22c formed at the end of the tip 22a and a male screw 22d formed in the opening of the insertion portion 22b and screwed into the female screw 21b of the shaft cylinder 21. I have. Further, the front end 22 is formed with a seat portion 22e for supporting a later-described second biasing member 47 of the drive mechanism 12 on the inner peripheral surface thereof.

  The distal end portion 22a is formed in a substantially conical shape by a curved surface that gradually decreases in diameter from the insertion portion 22b toward the distal end, and a small hole 22c is formed at the distal end. The insertion portion 22b has an outer diameter that is smaller than the outer diameter of the adjacent tip portion 22a, and is substantially the same as or slightly smaller than the inner diameter of the gripper 23. The small holes 22c are formed to have an inner diameter that is substantially the same as or slightly larger than the outer diameter of a writing section 32 described later of the writing body 11.

  The gripper 23 is made of, for example, an elastomer resin such as silicon rubber. For example, when the user of the writing instrument 1 grips the writing instrument 1, the gripper 23 is formed to fit the user's finger and generate an appropriate resistance (frictional force) to prevent slipping. Yes.

  The clip mechanism 24 has a support portion 26 provided on a part of the outer peripheral surface on one end side of the shaft tube 21, a torsion spring 27 fixed to the support portion 26, and a torsion spring 27 fixed to the support mechanism 26. The clip 28 is provided.

  The support portion 26 is formed integrally with the shaft cylinder 21 and is formed so that one end of the torsion spring 27 can be fixed. The torsion spring 27 is formed such that one end of the clip 28 can be biased toward the shaft cylinder 21. The torsion spring 27 is fixed to a part on the other end side of the clip 28.

  One end of the clip 28 is supported by the support portion 26 so as to be close to and away from the shaft cylinder 21. Specifically, the clip 28 is formed so that the other end of the torsion spring 27 can be fixed to the other end side. The clip 28 is formed on a projecting portion 28a formed on a portion facing the shaft cylinder 21 on one end side, an attachment portion 28b of a torsion spring 27 formed on the other end side, and constituting a rotation shaft, And an operation unit 28c provided at the other end.

  When the clip 28 is urged by the torsion spring 27, the projection 28 a comes into contact with the shaft tube 21 with a predetermined pressing force, and when the operation portion 28 c is pressed by the user, the periphery of the attachment portion 28 b is moved. As a rotation center, the tip rotates in a direction away from the shaft tube 21.

  The protruding portion 28 a is disposed at a substantially central portion of the window portion 21 d of the shaft tube 21 in the axial direction of the shaft tube 21. The protrusion 28a has a width longer than the opening width of the window 21d. In other words, the protrusion 28a is formed such that the length in the direction perpendicular to the axial direction of the shaft cylinder 21 is longer than the length in the direction perpendicular to the axial direction of the shaft cylinder 21 of the window 21d.

  For example, the protrusion 28a is formed with a flat surface on the front end 22 side and a curved surface on the knock body 42 side. The protrusion 28 a is an engagement means formed so as to be engageable with a first protrusion 41 g (described later) of the drive mechanism 12 protruding from the window portion 21 d of the shaft cylinder 21.

  The cursive body 11 is a so-called ballpoint pen refill. Specifically, the writing body 11 includes an ink tube 31 and a writing unit 32. The ink tube 31 contains water-based ink, oil-based ink, gel ink, or the like therein. The ink tube 31 includes a seat portion 31 a that protrudes from the outer surface and supports the second urging member 47 in the middle portion thereof. The writing unit 32 is connected to one end of the ink tube 31 and is formed so that ink can be applied to paper sheets for writing on paper or the like. The writing unit 32 is a chip that rotatably supports a ball at its tip.

  The drive mechanism 12 includes a guide tube 41 formed in a cylindrical shape, a knock body 42 provided at one end of the guide tube 41, and a first movable element provided at one end of the guide tube 41. 43, a second movable element 44 provided on the other end side of the guide cylinder 41, a plug body 45 in contact with the second movable element 44, and between the first movable element 43 and the second movable element 44. And a second urging member 47 provided between the tip 22 and the seat portions 22e and 31a of the ink pipe 31. In the drive mechanism 12, the cushion mechanism 25 is configured by the guide cylinder 41, the knock body 42, the first movable element 43, the second movable element 44, and the first urging member 46.

  The guide cylinder 41 has an outer peripheral shape that is substantially the same as the inner peripheral shape of the shaft cylinder 21. Specifically, as shown in FIG. 3, the guide tube 41 has an annular shape on the outer peripheral surface thereof, a guide protrusion 41a that engages with the groove portion 21c of the shaft tube 21, and an inner peripheral surface of one end portion thereof. A first annular protrusion 41b protruding to the other end, a protrusion 41c protruding partly from the window portion 21d, and a second protrusion protruding in an annular shape on the inner peripheral surface of the other end portion. An annular protrusion 41d. In addition, the guide cylinder 41 has a groove 41e formed on the inner peripheral surface on one end side thereof so as to extend in the axial direction and slidably contact a part of the first movable element 43. The guide cylinder 41 is formed so that the first movable element 43 and the second movable element 44 can be inserted into the guide cylinder 41 from one end side thereof.

  The guide protrusion 41a extends in the axial direction. The guide protrusion 41 a engages with the groove 21 c of the shaft tube 21 to restrict the movement of the guide tube 41 in the rotation direction and guide the movement of the guide tube 41 in the axial direction.

  The first annular protrusion 41 b is formed so as to be able to turn the knock body 42 and to be fixed in the axial direction by fitting with the knock body 42. The protrusion 41c protrudes from the end of the guide tube 41 along the axial direction, and a part of the end protrudes from the window 21d. The protrusion 41c is engaged with the protrusion 28a of the clip 28 in the axial direction. It is formed to be compatible. Further, the convex portion 41 c is formed so that a part of the convex portion 41 c located inside the shaft tube 21 can engage with the plug body 45 in the axial direction and the radial direction.

  Specifically, as shown in FIG. 3, the convex portion 41 c is formed to protrude from the end portion of the guide tube 41 and the outer surface side of the end portion of the shaft portion 41 f, and from the window portion 21 d. A first protrusion 41g that protrudes and engages with the protrusion 28a of the clip 28, and a second protrusion 41h that protrudes from the inner surface of the clip 28 and engages the plug body 45 are provided.

  The inner diameter of the second annular protrusion 41d is formed to be smaller than the outer diameter of the second movable element 44, and the second movable element 44 can be prevented from coming off from the guide tube 41 by contacting the second movable element 44. Is formed.

  The guide tube 41 is formed to be movable in the axial direction of the shaft tube 21 along the groove portion 21 c of the shaft tube 21 by engaging the guide protrusion 41 a with the groove portion 21 c of the shaft tube 21. Further, the guide tube 41 is fixed in a direction rotating with respect to the axis of the shaft tube 21 by the guide protrusion 41a interfering with the groove 21c.

  The knock body 42 is formed in a hollow cylindrical shape. One end of the knock body 42 protrudes from the opening 21 a of the shaft tube 21, and the other end is rotatably supported by the guide tube 41. As shown in FIGS. 4 and 7, the knock body 42 has a pair of flange portions 42 a that are fitted to the end surface of the guide tube 41 and are in contact with each other in the axial direction on the other end portion side, and the other end portion side. And a guide part 42b provided at the end part.

  The pair of flange portions 42a are fitted with the first annular protrusion 41b of the guide cylinder 41 in the facing gap, and come into contact with the first annular protrusion 41b so that the guide cylinder 41 is knocked to the guide cylinder 41 in the axial direction. 42 is fixed. In other words, the pair of flange portions 42 a are formed so that the movement of the knock body 42 in the axial direction can be transmitted to the guide cylinder 41 and the movement of the guide cylinder 41 in the axial direction can be transmitted to the knock body 42. .

  The guide part 42b is a notch part provided over a part in the circumferential direction of the knock body 42, for example, a range of 270 ° in the circumferential direction of the knock body 42. Specifically, as shown in FIG. 7 by developing the guide portion 42b, the guide portion 42b is a notch in which an inclined surface 42c that is inclined with respect to the circumferential direction is formed at an end portion thereof. The guide part 42b is formed so that the position of the first movable element 43 in the axial direction can be adjusted by the inclined surface 42c coming into contact with the first movable element 43.

  The inclined surface 42c is formed in a planar shape, and a plurality of curved surface portions 42d that are concave portions are formed at a predetermined interval (angle). The curved surface portion 42d has a radius of curvature substantially the same as the radius of curvature of the curved surface portion 43d formed at the end of a guided portion 43c described later of the first movable element 43. The inclined surface 42c is formed with nine curved surface portions 42d at intervals of 30 degrees, for example. Such a knock body 42 is an operating means capable of operating the guide cylinder 41 in the axial direction, and is an adjusting means formed so as to be able to adjust the position of the first movable element 43 by rotating.

  As shown in FIG. 5, the first movable element 43 is provided at a shaft portion 43 a formed so as to be insertable inside the knock body 42 and an end portion of the shaft portion 43 a and supports the second urging member 47. A seat 43b and a guided portion 43c provided on the outer peripheral surface of the shaft 43a and the seat 43b and extending along the axial direction.

  A part of the shaft portion 43 a is inserted into the knock body 42, and moves in the axial direction with respect to the knock body 42, thereby guiding the movement of the first movable element 43. The seat portion 43 b forms a seat surface that can support the first biasing member 46.

  The guided portion 43c is a key-shaped protrusion that extends in the axial direction, and is formed so that the groove portion 41e of the guide tube 41 and its outer surface can come into sliding contact with each other. The guided portion 43c includes a curved surface portion (end portion) 43d in which the outer surface of the end portion on the shaft portion 43a side is formed with a curvature radius substantially the same as that of the curved surface portion 42d.

  The second mover 44 is accommodated in the guide tube 41 on the second annular protrusion 41d side so as to be movable in the axial direction. The second armature 44 is opposed to the first armature 43 and the shaft portion 44 a that is formed at the end facing the second annular protrusion 41 d and having a smaller diameter than the outer peripheral surface thereof, and projects from the end of the guide tube 41. And a seat portion 44b that can support the first biasing member 46.

  The second movable element 44 is in contact with the second annular protrusion 41 d of the guide cylinder 41, so that the movement in the urging direction by the first urging member 46 is restricted. Specifically, the second movable element 44 is movable along the axis in the guide cylinder 41 and interferes with the second annular protrusion 41d of the guide cylinder 41, so that the first urging force is applied from the guide cylinder 41. It is formed so that it can be prevented from detaching in the urging direction by the member 46. The shaft portion 44 a is formed such that an end portion thereof can come into contact with the plug body 45. The 2nd needle | mover 44 is formed through the axial part 44a and the stopper 45 so that the writing body 11 can be supported.

  The plug body 45 is formed such that one end portion thereof can be brought into contact with the shaft portion 44 a of the second movable element 44 and the other end portion thereof can be brought into contact with the end portion of the ink tube 31. For example, the plug body 45 is formed so that the ink tube 31 can be centered and the ink tube 31 can be supported by the other end portion being recessed in a truncated cone shape. Further, the plug body 45 is engaged with the second convex portion 41 h of the convex portion 41 c of the guide tube 41 at a part of the outer peripheral surface thereof, so that the plug body 45 is more concretely moved when the guide tube 41 is moved in the axial direction. Is provided with a protrusion 45a that engages when the guide tube 41 moves to the knock body 42 side.

  The first urging member 46 is a coil spring, and is formed so that the first movable element 43 can be urged to the knock body 42, and the second movable element 44 can be urged to the second annular protrusion 41 d and the plug body 45. Has been.

  The second urging member 47 is a coil spring, and is interposed between the seat portion 22e of the tip 22 and the seat portion 31a of the ink tube 31 so as to be able to urge the ink tube 31 toward the plug body 45. Yes.

  The cushion mechanism 25 has a guide cylinder 41, a first movable element 43, a second movable element 44, and a first urging member 46, and the second movable element 44 from the writing section 32 through the ink tube 31 and the plug body 45 at the time of writing. The impact applied to the first urging member 46 can be absorbed by the compression of the first urging member 46.

  Further, the cushion mechanism 25 rotates the knock body 42 to change the position of the first movable element 43 in the axial center direction, and as shown in FIG. 6, the distance between the first movable element 43 and the second movable element. And the compression amount of the first urging member 46 compressed by the first movable element 43 and the second movable element is adjustable. The cushion mechanism 25 adjusts the compression amount of the first urging member 46 to adjust the load (setting load) for the second movable element 44 to move according to the load (writing pressure) applied to the writing unit 32. It is made possible.

  Such a drive mechanism 12 includes a part of the knock body 42, the first movable element 43, the first urging member 46, and the second movable part from the first annular protrusion 41b of the guide tube 41 toward the second annular protrusion 41d. A part of the child 44 is sequentially stored. In addition, the drive mechanism 12 includes the window portion 21d of the shaft tube 21 of the outer shell member 10 and the projection portion 28a of the clip 28 by the first convex portion 41g of the guide tube 41, and the writing body by the bias of the second biasing member 47. 11 and a restricting means capable of restricting the movement of the drive mechanism 12 and releasing the restriction.

  Next, the usage method of the writing instrument 1 comprised in this way is demonstrated using FIG.1, FIG.2, FIG.6 and FIG. In addition, in this description, the front end 22 side of the writing instrument 1 will be referred to as the front end side, and the knock body 42 side of the writing instrument 1 will be described below as the rear end side.

  First, in a state where the writing instrument 1 is not used, the drive mechanism 12 is moved to the rear end by the biasing force of the second biasing member 47 as shown in FIG. It is stored in. In this state, when the user presses the knock body 42 against the urging direction of the second urging member 47, a part of the knock body 42 is inserted into the shaft cylinder 21.

  Due to the movement of the knock body 42, the guide tube 41 moves in the axial direction along the groove portion 21 c of the shaft tube 21. By the movement of the guide tube 41, the first convex portion 41g comes into contact with the protruding portion 28a of the clip 28. When the guide tube 41 further moves and the first convex portion 41g pushes up the projection 28a, the projection 28a rides on the first convex portion 41g and rotates, and the second movable element 44 pushes the plug 45. By pressing, the stopper body 45 and the writing body 11 are moved against the second urging member 47.

  Next, when the user releases the pressing operation of the knock body 42, the writing body 11, the plug body 45 of the drive mechanism 12, the second movable element 44, and the first attachment are applied by the urging of the second urging member 47. The biasing member 46, the first movable element 43, the guide cylinder 41, and the knock body 42 are biased. At this time, the first convex portion 41g protruding from the window portion 21d abuts on the projection 28a of the clip 28 and engages in the axial direction, whereby the cursive body 11 by the biasing of the second biasing member 47, The movement of the plug body 45, the second movable element 44, the first urging member 46, the first movable element 43, the guide cylinder 41, and the knock body 42 of the drive mechanism 12 is restricted. Thereby, as for the writing instrument 1, the writing part 32 protrudes from the small hole 22c of the tip 22, and the said state is maintained.

  In this state, the user grasps the writing instrument 1, brings the ball at the tip of the writing unit 32 into contact with a paper sheet such as a paper body, and moves the writing instrument 1 in an arbitrary writing direction. A part of the outer peripheral surface of the opposed writing part 32 abuts on a part of the inner peripheral surface of the small hole 22c, and the writing part 32 is supported by the small hole 22c. For this reason, the writing unit 32 abuts on the paper sheet with a predetermined force, and the ball rotates, slides on the paper sheet, and adheres to the surface of the ball by the rotation and is discharged. The ink inside is applied onto the paper sheet.

  At this time, the user presses the writing instrument 1 toward the paper sheets with a predetermined force for writing. For this reason, since pressure (load) due to writing pressure is applied to the tip of the writing unit 32, the ink tube 31 is pressed in the immersion direction of the writing unit 32, and the plug body 45 is pressed by the ink tube 31. . The plug body 45 pressed by the writing body 11 presses the second movable element 44.

  When the pressure that presses the second movable element 44 exceeds the elastic force of the first urging member 46, the second movable element 44 compresses the first urging member 46 and moves the first movable element 43 in the guide cylinder 41. Move in the direction closer to. By the movement of the second movable element 44, the writing unit 32 (writing body 11) moves in the immersion direction, the writing pressure applied to the writing unit 32 is reduced, and the impact during writing is reduced.

  Next, after the writing is completed, the user presses the operation unit 28 c and rotates the clip 28. As the clip 28 rotates, the protrusion 28a is separated from the shaft tube 21, and the engagement between the protrusion 28a and the first protrusion 41g is released. As a result, the writing body 11, the plug body 45, the second movable element 44, the first urging member 46, the first movable element 43, the guide cylinder 41, and the knocking body 42 are moved by the urging of the second urging member 47. Moving to the end side, the writing unit 32 is immersed in the tip 22.

  According to the writing instrument 1 configured as described above, the second movable element 44 and the first urging member 46 of the cushion mechanism 25 reduce the writing pressure applied to the writing unit 32 during writing and reduce the impact during writing. It becomes possible.

  The cushion mechanism 25 has an inclined surface 42c in the guide portion 42b of the knock body 42, and the guided portion 43c is engaged with the groove portion 41e of the guide cylinder 41 extending in the axial direction. In this configuration, movement in the rotational direction is restricted. Therefore, by rotating the knock body 42, the guided portion 43c moves to any position on the inclined surface 42c, and the first mover 43 moves in the axial direction. By the movement of the first mover 43, the distance between the first mover 43 and the second mover 44 can be adjusted as shown in FIG.

  The cushion mechanism 25 adjusts the set load by which the first urging member 46 is compressed by the first movable element 43 and the second movable element 44 by changing the gap between the first movable element 43 and the second movable element 44. As a result, the elastic force of the first biasing member 46 can be adjusted. Thereby, it becomes possible to adjust the load which the 2nd needle | mover 44 moves with the pressure added to the writing part 32, in other words, the writing pressure added to the writing body 11 at the time of writing.

  That is, since the user can arbitrarily set the elastic force of the first urging member 46, the pressure at which the writing unit 32 moves backward even when the writing pressure applied to the writing unit 32 varies depending on the user. Can be a preferred setting of the user. As described above, the load for retracting the writing unit 32 can be arbitrarily adjusted by the rotation of the knock body 42, so that the first urging member 46 having an elastic force suitable for each user is replaced. It is not necessary and can be easily adjusted to the first biasing member 46 having a preferable elastic force.

  Further, the guide portion 42b is provided with a plurality of curved surface portions 42d on the inclined surface 42c, so that the end portion of the curved surface portion 43d of the guided portion 43c rides on the curved surface portion 42d of the inclined surface 42c when the knock body 42 rotates. Then, it moves to the adjacent curved surface portion 42d. When the guided portion 43c moves between the curved surface portions 42d, a click feeling is generated, and a good operation feeling can be obtained.

  Further, as shown in FIG. 7, the inclined surface 42c and the guided portion 43c are configured such that the curved surface portions 42d and 43d are in contact with each other. It is possible to prevent the force in the center direction from being converted to the force in the direction in which the knock body 42 rotates by the inclined surface 42c. Thereby, it is possible to prevent the guided portion 43c from moving along the inclined surface 42c during writing, in other words, it is possible to prevent the setting of the first urging member 46 from being changed.

  As described above, according to the writing instrument 1 according to one embodiment of the present invention, the set load by which the first biasing member 46 is compressed by the knock body 42 and the first movable element 43 is adjusted, and the first biasing member The elastic force 46 can be varied, and the load with which the writing unit 32 moves backward can be arbitrarily adjusted. Thereby, even if the load applied to the writing unit 32 varies depending on the user, the writing unit 32 can be moved backward with a set load suitable for the user.

  The present invention is not limited to the above embodiment. For example, in the above-described example, the writing body 11 of the writing instrument 1 has been described as being a refill of a ballpoint pen. However, the writing body 11 is not limited to this, and the writing body 11 has a mechanical pencil mechanism (a mechanical pencil) that protrudes from the core body and performs writing. Refill). The writing instrument 1 can have the same function and effect even when the mechanical pencil mechanism is used for the writing body 11. Moreover, since the impact and pressure at the time of writing are relieved by the cushion mechanism 25, the load applied to the core body used for the mechanical pencil mechanism is reduced by using the mechanical pencil mechanism for the writing body 11, and the core body is The so-called broken core can be prevented.

  In the example described above, the writing instrument 1 is engaged with the first convex portion 41 g of the guide cylinder 41 of the drive mechanism 12 and the protrusion 28 a that is the engaging means of the clip 28, thereby Although the configuration of the regulating means capable of regulating the movement of the writing body 11 and the drive mechanism 12 by the bias has been described, the invention is not limited to this. For example, the engaging means of the restricting means is configured by the end face of the window portion 21d, and the user presses the first convex portion 41g into the shaft cylinder 21, whereby the engagement between the first convex portion 41g and the engaging means. The configuration may be such that the restriction of the movement of the writing body 11 and the drive mechanism 12 by the second urging member 47 is released. Moreover, if the movement of the writing body 11 and the drive mechanism 12 can be regulated, the configuration of the regulating means can be set as appropriate.

  Moreover, although the structure which provides the cushion mechanism 25 which reverse | retreats to the knock type writing instrument 1 was demonstrated in the example mentioned above, it is not limited to this, For example, it is a writing instrument using the non-knock type writing instrument and the some writing body 11. Alternatively, the cushion mechanism 25 may be provided. When the cushion mechanism 25 is used for a non-knock type writing instrument, it is not a knock body 42 but is rotated by, for example, a shaft-shaped adjusting means having only a guide portion 42b for adjusting the position of the first movable element 43. I just need it. Moreover, although the structure which supports the writing body 11 with the stopper 45 was demonstrated, it is not limited to this, The structure which supports the writing body 11 with the 2nd needle | mover 44 may be sufficient.

  Moreover, although the writing instrument 1 demonstrated the structure which has the gripper 23 in the example mentioned above, it is not limited to this, For example, the insertion part 22b of the tip 22 is made into the external shape equivalent to the gripper 23, and does not have the gripper 23. It may be a configuration. In addition, various modifications can be made without departing from the scope of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Writing instrument, 10 ... Outer member, 11 ... Writing body (refill), 12 ... Drive mechanism, 21 ... Shaft cylinder, 21d ... Window part, 22 ... End, 23 ... Gripper, 24 ... Clip mechanism, 25 ... Cushion mechanism , 26 ... support part, 27 ... torsion spring, 28 ... clip (regulating means), 28a ... projection part (engaging means), 28c ... operation part, 31 ... ink tube, 31a ... seat part, 32 ... writing part, 41 ... guide cylinder, 41e ... groove, 41g ... first convex part (regulating means), 42 ... knock body (adjusting means), 43 ... first movable element, 44 ... second movable element, 45 ... plug body, 46 ... first 1 biasing member, 47... 2nd biasing member.

Claims (8)

A cylindrical outer member;
Cursive body accommodated in the outer member;
A guide tube formed in a cylindrical shape and having a groove portion extending in the axial direction on the inner peripheral surface, rotatable to the guide tube, fixed in the axial direction, and a part thereof inclined with respect to the circumferential direction A knock body having a guide portion formed with an inclined surface, a first mover having a guided portion disposed in the guide tube, engaged with the groove portion, and having an end portion in contact with the inclined surface; A second movable element that is disposed in the guide cylinder so as to face the first movable element and supports the writing body, and is inserted into the guide cylinder and supported by the first movable element and the second movable element. A cushion mechanism that is movable in the axial direction within the outer member;
A second biasing member provided in the outer member and biasing the writing body and the cushion mechanism;
Restriction means capable of restricting movement of the writing body and the cushion mechanism biased by the second biasing member, and capable of releasing restriction of movement of the writing body and the cushion mechanism;
Writing instrument characterized by comprising. The inclined surface includes a plurality of curved surface portions formed at a predetermined interval,
The writing instrument according to claim 1, wherein the guided portion is formed by a curved surface in which the end portion in contact with the inclined surface contacts the curved surface portion. The regulating means is
A window provided in the outer member;
Protruding portions that are provided integrally with the guide cylinder and project from the window portion by moving by a pressing operation of the knock body,
Engaging means for engaging with a protrusion protruding from the window;
The writing instrument according to claim 1, comprising:   The writing instrument according to claim 1, wherein the writing body is a refill of a ballpoint pen or a refill of a mechanical pencil. A cylindrical outer member;
Cursive body accommodated in the outer member;
A guide cylinder that is formed in a cylindrical shape and has a groove portion extending in the axial direction on the inner peripheral surface, and is rotatably supported by the guide cylinder, and an inclined surface that is inclined with respect to the circumferential direction is formed in a part of the guide cylinder. An adjusting means having a guide portion, a first movable element disposed in the guide tube, having a guided portion that engages with the groove portion and whose end abuts against the inclined surface, and the first mover in the guide tube A second movable element arranged opposite to the first movable element and supporting the writing body; and a biasing member inserted into the guide tube and supported by the first and second movable elements. A cushioning mechanism,
Writing instrument characterized by comprising. The inclined surface includes a plurality of curved surface portions formed at a predetermined interval,
6. The writing instrument according to claim 5, wherein the guided portion is formed by a curved surface in which the end portion in contact with the inclined surface contacts the curved surface portion. A cushion mechanism that is provided in a writing instrument and supports a writing body that writes on a paper sheet,
A guide tube having a groove formed in a cylindrical shape and extending in the axial direction on the inner peripheral surface;
An adjusting means having a guide portion that is rotatably supported by the guide tube and in which an inclined surface that is inclined with respect to the circumferential direction is formed.
A first movable element that is disposed in the guide cylinder, has a guided part that engages with the groove part, and an end part of which is in contact with the inclined surface;
A second mover disposed in the guide cylinder so as to face the first mover and supporting the writing body;
A cushion mechanism comprising: an urging member inserted into the guide tube and supported by the first movable element and the second movable element. The inclined surface includes a plurality of curved surface portions formed at a predetermined interval,
The cushion mechanism according to claim 7, wherein the guided portion is formed by a curved surface in which the end portion that contacts the inclined surface contacts the curved surface portion.

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