JP2015089674A - Side knock type writing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a side knock type writing instrument in which an operation member can be smoothly oscillated with a simple structure having an excellent productivity.SOLUTION: A side knock type writing instrument includes a barrel 10, and an operation member 50 in which a pressed piece part 51 is penetrated through a peripheral wall of the barrel 10 and is exposed to the exterior. A writing part 32 projects by an operation for oscillating the operation member 50 to an inner side of the barrel. The operation member 50 has the pressed piece part 51 which is so provided as to extend in a cross direction, and a support part 52 which is integrally connected to one end side of the pressed piece part 51. The support part 52 is fitted to a peripheral wall inner surface of the barrel 10 with a clearance so that the support part slides and slowly moves on the peripheral wall inner surface in association with oscillation of the pressed piece part 51.

Description

  The present invention relates to a side knock type writing instrument in which a writing part is projected by a pressing operation with respect to an operation member of a shaft cylinder peripheral wall such as a side knock type ballpoint pen.

Conventionally, in this type of invention, as described in, for example, Patent Document 1, a cylindrical exterior body (1) and an operation member that is swingably supported on a peripheral wall of the exterior body (1) ( A pressing piece 9), a shaft (8) serving as a swing fulcrum of the operating member (pressing piece 9), two torsion coil springs (10) for urging the operating member (pressing piece 9), and an exterior body (1 There is a side knock type writing instrument provided with a refill main body (2) which can be advanced and retreated in the inside and urged backward, and an action member (11) which slides integrally with the refill main body (2).
According to this prior art, when the front end side of the operating member (pressing piece 9) is pressed, the operating member (pressing piece 9) swings inward of the exterior body (1) and the inclined surface ( 12), the action member (11) and the refill body (2) move forward, and the writing part at the tip of the refill body (2) protrudes, and the lock claw (16) on the rear end side of the action member (11). Is hooked on the peripheral wall of the exterior body (1), and the protruding state is maintained. To release this protruding state, if the rear end side of the operating member (pressing piece 9) is pushed inward, the rear end side of the operating member (pressing piece 9) comes into contact with the lock claw (16). Then, the lock claw (16) is removed, the action member (11) and the refill body (2) are retracted, and the writing part is immersed.

However, in the above prior art, the shaft (8) is used as the swing fulcrum of the operating member (pressing piece 9), and the operating member (pressing piece 9) is biased by the torsion coil spring (10). Man-hours are required for mounting the shaft (8) and the torsion coil spring (10).
Moreover, since the dimension which the operation member (pressing piece 9) protrudes from an exterior main body (1) to an outer diameter direction is large, a hand will touch the operating member (pressing piece 9) unintentionally during writing, and a writing part May become immersive.

JP 2003-54187 A

  The present invention has been made in view of the above-described conventional circumstances, and the problem is that the operation member can be smoothly swung with a simple structure excellent in productivity, and the amount of protrusion of the operation member can be reduced. It is in providing the side knock type writing instrument which can be made small.

  One means for solving the above-described problems includes a shaft cylinder and an operation member that is exposed to the outside through the pressed piece portion in the peripheral wall of the shaft cylinder, and the pressed piece portion is rocked to the inside of the shaft cylinder. In the side knock type writing instrument in which the writing part is projected by the operation to be moved, the operation member is integrally connected to the pressed piece part provided to extend in the front-rear direction and one end side of the pressed piece part. The support portion is fitted in a state having play with respect to the inner surface of the peripheral wall so that the support portion slides and finely moves on the inner surface of the peripheral wall of the shaft cylinder as the pressed piece portion swings. It is characterized by being matched.

  Since the present invention is configured as described above, the operation member can be smoothly swung with a simple structure excellent in productivity, and the protrusion amount of the operation member can be reduced.

It is an internal structure figure which shows an example of the side knock type writing instrument which concerns on this invention. The refill 30 is indicated by a two-dot chain line. (I) is an end view taken along line (I)-(I) in FIG. 1, and (II) is an end view taken along line (II)-(II) in FIG. The refill 30 is indicated by a two-dot chain line with the internal structure omitted. (III) is an end view taken along line (III)-(III) in FIG. 1, (IV) is an end view taken along line (IV)-(IV) in FIG. 1, and (V) is shown in FIG. FIG. 6 is an end view taken along line (V)-(V). The refill is indicated by a two-dot chain line with the internal structure omitted. In (III) and (IV), the first sliding contact portion 52a located on the back side is indicated by a two-dot chain line. (VI) is an end view taken along line (VI)-(VI) in FIG. 1, (VII) is an end view taken along line (VII)-(VII) in FIG. 1, and (VIII) is shown in FIG. FIG. 6 is an end view taken along line (VIII)-(VIII) of FIG. In (VI), the refill 30 is indicated by a two-dot chain line with the internal structure omitted. (A) is a top view which shows an example of a shaft cylinder, (b) is a whole sectional view which follows the (I)-(I) line | wire of this figure (a). (A) is a top view which shows an example of a shaft cylinder, (b) is a whole sectional view which follows the (I)-(I) line | wire of this figure (a). (A) is a top view which shows an example of an engaging member, (b) is a half sectional view which follows the (I)-(I) line | wire of this figure (a). (A) is a top view which shows an example of a clip, (b) is the whole sectional view which follows the (I)-(I) line of this figure (a), (c) is the clip of the same It is a back view. It is operation | movement explanatory drawing which shows the front half part of the side knock type writing instrument in a full cross section, (a) has shown the state in which the writing part was immersed, (b) has shown the state in which the writing part protruded by operation of the operation member. The refill 30 is indicated by a two-dot chain line. It is operation | movement explanatory drawing which shows the latter half part of the side knock type writing instrument in full cross section, (a) has shown the state which the clip opened, (b) has shown the state which the clip closed.

The first feature of the present embodiment is provided with a shaft cylinder and an operating member that is exposed to the outside through the pressed piece portion in the peripheral wall of the shaft tube, and the pressed piece portion is rocked to the inside of the shaft tube. In the side knock type writing instrument in which the writing part is projected by the operation to be moved, the operation member is integrally connected to the pressed piece part provided to extend in the front-rear direction and one end side of the pressed piece part. The support portion is fitted in a state having play with respect to the inner surface of the peripheral wall so that the support portion slides and finely moves on the inner surface of the peripheral wall of the shaft cylinder as the pressed piece portion swings. It is matched.
Here, the “fine movement” includes a part or all of the rotational movement of the support part, the back-and-forth movement of the support part, the movement of the support part in the axial cylinder radial direction, and the like.
According to this configuration, when the pressed piece portion is pressed toward the inner side of the shaft cylinder, the support portion integral with the pressed piece portion is applied to the swing fulcrum side of the pressed piece portion by the force applied to the peripheral wall of the shaft tube. While being in sliding contact with the inner surface, it is finely moved, and the pressed portion is smoothly swung toward the inner side of the shaft tube. And since it is a structure which arrange | positions a support part in a shaft cylinder, it is possible to make small the protrusion amount to the radial direction of a to-be-pressed piece part.

As a second feature, the support portion has a first slidable contact portion that is slidable in contact with the inner surface of the peripheral wall of the shaft tube on the opposite side to the pressed piece portion side in the shaft tube radial direction.
According to this configuration, the support portion rotates smoothly with the at least first sliding contact portion slidingly contacting the inner surface of the peripheral wall of the shaft tube.

As a third feature, the support portion has a second slidable contact portion that can slidably contact the inner surface of the peripheral wall of the shaft tube on the pressed piece portion side in the shaft tube radial direction.
According to this structure, a support part makes one or both of a 1st sliding contact part and a 2nd sliding contact part slidably contact with the surrounding wall inner surface of the said axial cylinder, and rotates smoothly.

As a fourth feature, the first sliding contact portion has a convex curved surface formed on the inner surface of the peripheral wall of the shaft tube.
According to this configuration, the resistance when the support portion rotates can be reduced by the first sliding contact portion having a convex curved surface shape.

Further, as a fifth feature, when the projecting operation pressed portion near the front end of the operation member is pressed, the writing portion is projected, and the immersion operation pressed portion near the rear end of the operation member is pressed. A side knock-type writing instrument configured to immerse the writing part when being pushed, wherein the pressed part for the immersing operation has a notch part extending in the front-rear direction near the rear end part of the operation member. Two are provided at intervals in the circumferential direction, and the space between these two notches is bent toward the inner side of the shaft tube.
According to this configuration, since the pressed portion for the immersing operation flexes flexibly, the operability when immersing the writing portion is good.

Further, as a sixth feature, the pressed piece when swinging inwardly of the shaft cylinder is brought into sliding contact with a portion that can be moved forward and backward integrally with the writing portion, and the writing portion is advanced to protrude. I tried to do it.
Here, the “part capable of moving forward and backward integrally with the writing unit” includes, for example, the writing unit itself, a ballpoint pen refill having the writing unit at the front end, and a member fixed to the refill.
According to this structure, a writing part can be made to protrude by the simple structure with favorable operativity and productivity.

Further, as a seventh feature, a refill provided to advance and retreat in the shaft tube, an engagement member fixed to the refill, and a biasing member for biasing the refill and the engagement member rearward A side knock type writing instrument in which the writing portion at the front end of the refill is caused to appear and retract by the advancement and retraction of the refill, wherein the engagement member is slidably contacted with the inner surface of the operation member and pushed forward. A sliding contact surface, and an engagement / disengagement piece that is engaged with an engaged portion of the inner peripheral surface of the shaft cylinder when moving forward. The engagement / disengagement piece is pressed to disengage from the engaged portion.
According to this configuration, when the writing part is projected, if the operation member is swung to the inner side of the shaft tube, the inner surface of the operation member is brought into sliding contact with the sliding contact surface of the engagement member. The member and the refill are pushed forward, and the writing portion at the front end of the refill protrudes.
Further, when the writing portion in the protruding state is immersed, if the pressed portion for immersion operation is pressed and bent toward the inner side of the shaft tube, the inner surface of the pressed portion for immersion operation presses the engagement / disengagement piece to be covered. The engagement member and the refill are moved rearward by the force of the biasing member, and the writing portion at the front end of the refill is immersed.

It should be noted that the embodiments described later also disclose an invention that does not include a part of the above-described features and that only requires the following constituent elements.
That is, according to one aspect of the present invention, in the clip mounting structure for a writing instrument having a clip that can be opened and closed on the outer peripheral side of the shaft tube, the clip includes a clip body extending in the front-rear direction along the outer peripheral surface of the shaft tube, and the clip A clip support part that protrudes from one end of the main body in the front-rear direction to the inner side of the shaft cylinder is integrally provided, and the clip support part penetrates the peripheral wall of the shaft cylinder and can be rotated inside the inner surface of the peripheral wall. I support it.
According to this configuration, since the clip support portion is supported in the shaft tube, a design in which the size of the clip body projecting radially outward from the shaft tube outer peripheral surface is possible.

Next, a preferred embodiment having the above features will be described in detail with reference to the drawings.
In this specification, the axial direction of the cylinder means the direction in which the center line of the axial cylinder extends. “Front” means one side of the axial direction of the cylinder and the tip direction of the writing portion. Further, “rear” means a direction opposite to the one side in the axial direction of the shaft cylinder. The “axial cylinder radial direction” means a direction orthogonal to the axial cylinder axis direction. In addition, the “outward direction of the shaft tube diameter” means a direction away from the center of the shaft tube along the shaft tube diameter direction. The “inner cylinder radial direction” means a direction approaching the center of the axial cylinder along the axial cylinder radial direction.

  As shown in FIG. 1, the side knock type writing instrument includes a shaft tube 10, a tip 20 connected to the front end of the shaft tube 10, a refill 30 provided so as to advance and retreat in the shaft tube 10, An engaging member 40 fixed to the refill 30; an operating member 50 capable of moving the refill 30 forward and backward on the front side of the shaft tube 10; and a biasing member 60 for biasing the refill 30 and the engaging member 40 backward; A clip 70 is provided on the rear end side of the shaft tube 10 so as to be openable and closable, and a resilient member 80 for projecting the clip 70 in the closing direction.

The shaft cylinder 10 is formed in a long cylindrical shape (long cylindrical shape in the illustrated example), and the front end 20 is connected to the opening on the front end side, and the rear end side is closed. In addition, as another example of the shaft tube 10, a mode in which a plurality of cylinders such as a front shaft and a rear shaft are connected, a mode in which a separate tail plug is connected to the rear end, and the front port 20 are integrated. It is also possible to have a mode or the like.
As shown in FIG. 5, an operation member through-hole 11 (see FIG. 5) for allowing the operation member 50 to penetrate in the radial direction and a clip 70 in the radial direction are provided before and after the peripheral wall of the shaft tube 10 in the illustrated example. A clip through-hole 12 is provided.

  The operation member through hole 11 is a rectangular hole penetrating in the radial direction through the grip portion on the front side of the peripheral wall of the shaft tube 10 (see FIG. 5). On the outer peripheral surface of the shaft tube 10, a concave curved surface portion 11 a in which the peripheral wall of the shaft tube 10 is partially recessed is provided around the front half of the operation member through hole 11. The concave curved surface portion 11a improves the operability with respect to the operation member 50 by sinking a finger pushing the operation member 50 described later inward in the axial tube diameter direction.

The clip through-hole 12 penetrates radially near the rear end of the peripheral wall of the shaft tube 10, and the clip support portion 72, the opening / closing operation portion 71 b and the resilient member 80 of the clip 70 are moved along the shaft tube radial direction. It is formed in a substantially rectangular shape that can be inserted into the shaft cylinder 10 (see FIG. 5).
A cutout portion 12a is provided at the front inner edge of the clip through hole 12 at a position where a shaft portion of a clip 70, which will be described later, rides in the radially inward direction. The notches 12a are respectively disposed on both sides in the axial direction of the shaft cylinder at the inner edge of the clip through hole 12. Each notch 12a is formed in a concave shape in plan view (see FIG. 5A).

Further, on the rear side of the outer peripheral surface of the shaft tube 10, a clip immersing portion 13 is provided in which all the portions facing the inner surface of the clip main body 71 are immersed more inwardly in the shaft tube diameter than the other portions (FIG. 1). And FIG. 5).
The clip immersing portion 13 is recessed inward in the radial direction from the cylindrical outer peripheral surface contour of the shaft tube 10 (or a portion on the front side of the outer peripheral surface of the shaft tube 10), and is formed substantially flat over the front-rear direction. The In other words, as shown in FIGS. 4 (VI) to (VIII) and FIGS. 5 (a) and 5 (b), the clip immersing portion 13 is formed so that the outer peripheral surface of the shaft tube 10 is in the clip width direction (the left-right direction in FIG. 4). ) And a portion cut out in a flat shape in the longitudinal direction of the shaft cylinder.
The depth of the clip immersing portion 13 in the axial cylinder radial direction is such that, according to the illustrated example, the clip main body 71 sinks more than half of its thickness into the axial cylinder inside, and the surface is contoured on the outer peripheral surface of the axial cylinder 10. It is set appropriately so as to protrude slightly from (see FIG. 1).

  Moreover, the inclined surface 14 is provided in the front side of the clip immersion part 13 in the axial cylinder 10 outer peripheral surface (refer FIG.1 and FIG.5). The inclined surface 14 is a surface that gradually inclines from the front side to the clip immersing portion 13 surface, and sandwiches an object to be clamped such as a paper or clothing pocket between the clip immersing portion 13 and the clip main body 71. , To smoothly guide the object to be clamped.

Further, an engaged portion 15 for engaging and disengaging an engaging member 40 described later is provided in the vicinity of the rear end edge of the operation member through hole 11 on the inner peripheral surface of the shaft cylinder 10 (see FIGS. 5 and 9). ).
The engaged portion 15 has the inner peripheral surface of the shaft tube 10 recessed in a stepped shape toward the front, and locks the engagement / disengagement protrusion 44a (see FIG. 7) of the engagement member 40 when it moves forward. .

  Further, a guide convex portion 16a and a guide concave portion 16b are provided on the inner peripheral surface of the shaft cylinder 10 at a portion facing the operation member through hole 11 in the radial direction (see FIGS. 5 and 2 to 4).

Two guide convex portions 16a are provided at intervals in the clip width direction (left-right direction in FIG. 2) (see FIGS. 2 and 3). Each guide protrusion 16a is a substantially rail-like projection that continues in the front-rear direction, and is provided in a range in the front-rear direction that is at least in sliding contact with the operation member 50. According to one example of FIG. Has been.
An operation member 50 described later fits slidably on both sides of the two guide protrusions 16a, 16a in the clip width direction (see FIGS. 3 (III) and (IV)).

The guide recess 16b is a recess that continues in the front-rear direction, and is provided at least in a range in the front-rear direction in sliding contact with the engagement member 40. According to the example of FIG. . The guide recess 16b in the illustrated example has two guide protrusions 16a and 16a in the front-rear direction range of the operation member through-hole 11 as shown in FIGS. 2 (I) (II) and 3 (III) (IV). Located between.
An engagement member 40 described later is fitted into the guide recess 16b and guided in the front-rear direction.

Further, locking projections 17 and 17 for locking the clip 70 are provided on the inner peripheral surface on the rear end side of the shaft tube 10 corresponding to the positions of the notches 12a and 12a (see FIG. 5A). (See FIG. 4 (VII) and FIG. 5 (b)).
Each locking projection 17 is provided with a guide inclined surface 17a (see FIG. 4 (VII)) so that the clip 70 can be smoothly passed over and fitted. The guide inclined surface 17 a is formed in an inclined surface shape that protrudes from the inner peripheral surface of the shaft tube 10 toward the anti-clip 70 side.

  Further, on the inner peripheral surface on the rear end side of the shaft tube 10, a concave portion 18 a (FIG. 5B and FIG. And a restricting portion 18b (see FIG. 4 (VII)) for restricting the movement of the clip 70 in the insertion direction (downward according to FIG. 4) into the shaft cylinder 10.

According to the illustrated example, the recess 18a is formed in a rectangular shape in plan view that is longer in the longitudinal direction than the outer diameter of the resilient member 80 and slightly larger than the outer diameter of the resilient member 80. While receiving the end portion, it approaches the outer periphery of the end portion from both sides in the clip width direction (see FIG. 4 (VIII)).
In a preferred example of this embodiment, the recess 18 a is formed in the rectangular shape so as to allow the elastic member 80 to slide slightly in the front-rear direction while contracting due to the opening and closing operation of the clip 70. That is, when the opening / closing operation portion 71b sinks to the inside of the shaft tube 10 by the opening operation of the clip 70, the elastic member 80 slides slightly forward while being compressed and deformed, and when the clip 70 is closed, the elastic member 80 Slides in the opposite direction while restoring. For this reason, the resistance at the time of opening and closing operation of the clip 70 can be reduced by the slip.

  The restricting portion 18b is secured in a flat surface on both sides in the clip width direction on the surface facing the clip through hole 12 in the shaft cylinder 10, and is continuous in the longitudinal direction of the shaft cylinder (see FIG. 4 (see VII in FIG. 4). )). The restricting portion 18b receives the clip 70 from the inner side of the shaft cylinder when the rear side of the clip 70 is excessively pressed inwardly of the shaft cylinder, and the rear side of the clip 70 sinks into the shaft cylinder 10 too much. To prevent it.

  1 and 5 is an engaged portion (through hole in the illustrated example) that engages the engaging / disengaging protrusion 44a of the engaging member 40 at the initial position. As another example, the engaged portion 10a1 may be omitted and the engaging / disengaging protrusion 44a at the initial position may be received by the flat inner peripheral surface of the shaft tube 10.

  The front opening 20 is formed in a tapered conical cylinder shape, is screwed to the front end side of the shaft cylinder 10 and is inserted through the front end side of the refill 30 so as to be able to advance and retreat. A front end portion of the urging member 60 (compression coil spring) is received at the step portion in the tip 20.

The refill 30 is a ballpoint pen refill comprising a cylindrical ink tank 31 filled with ink and a writing section 32 (specifically, a ballpoint pen tip) press-fitted to the front end of the ink tank 31 (see FIG. 1).
The refill 30 is inserted into the engaging member 40 and detachably connected so as to advance and retreat integrally with the engaging member 40 in the shaft cylinder 10.

  The engaging member 40 is a part that can advance and retreat integrally with the writing part 32, and as shown in FIGS. 7A and 7B, a holding part 41 that holds a midway position in the front-rear direction of the refill 30; From the connection part 42 extended rearward from the holding part 41, the press-fit part 43 connected to the rear end of the connection part 42 and detachably press-fixed to the rear end part of the refill 30, and the press-fit part 43 The engaging / disengaging piece 44 protruding toward the operation member 50 side and the guided portion 45 fitted between the guide convex portions 16a, 16a on the inner peripheral surface of the shaft cylinder 10 are integrally formed from a flexible synthetic resin material. Is molded. When the refill 30 is exchanged as the ink is consumed, the refill 30 is removed from the engaging member 40.

  The holding portion 41 is a member that is slidably contacted with the operation member 50 when it is inserted through the refill 30 and bent inwardly in the axial tube diameter. According to the illustrated example, the holding portion 41 is formed in a substantially cylindrical shape, and has a sliding contact surface 41 a that is slidably contacted with the inner surface of the operation member 50 and pushed forward on the outer peripheral portion on the rear end side. The to-be-slidable contact surface 41a is formed in a convex curved shape that protrudes toward the rear oblique operation member 50, and receives a plurality of sliding contact protrusions 51c and 51c.

  The connecting portion 42 is formed in a long shape extending rearward along the portion on the side opposite to the refill 30 on the inner peripheral surface of the shaft tube 10, and the press-fit portion 43 is connected to the rear end thereof.

  The press-fit portion 43 only needs to have a shape capable of press-fitting the rear end of the refill 30. According to the illustrated example, the press-fit portion 43 is formed in a substantially rectangular tube shape, and the protrusion formed on the inner surface thereof is pressed against the outer peripheral surface of the refill 30. Thus, the refill 30 is held immovably. An engagement / disengagement piece 44 is connected to the front end of the press-fit portion 43 near the operation member 50.

  The engagement / disengagement piece 44 is a long piece-like portion that projects forward and extends from the press-fit portion 43 and is shorter than the connection portion 42, and is engaged / disengaged at the midway position in the longitudinal direction. A projection 44a is provided, and a portion on the front side of the engagement / disengagement projection 44a is a receiving piece 44b that receives the pressed piece 51 of the operating member 50 from the inner side of the shaft cylinder (see FIG. 7). The engaging / disengaging protrusion 44 a has a shape that follows the inner surface of the engaged portion 15 in the shaft tube 10.

  The guided portion 45 is a long rectangular protrusion provided on the counter-operation member 50 side of the connecting portion 42 and the press-fitting portion 43 so as to extend in the longitudinal direction of the shaft tube, and the guide convex portion on the inner peripheral surface of the shaft tube 10. Between 16a and 16a, it fits so that sliding to the front-back direction is possible. The guided portion 45 guides the engagement member 40 and the advancement and retraction of the refill 30 integrated with the engagement member 40.

  Further, the operating member 50 includes a pressed piece portion 51 that extends in the longitudinal direction of the shaft cylinder, and a support portion 52 that is integrally connected to the rear end side of the pressed piece portion 51 (see FIG. 6). ). The operating member 50 has the pressed piece 51 inserted through the operating member through hole 11 (see FIG. 5) on the front side of the peripheral wall of the shaft tube 10 and exposed to the outside.

  The pressed piece 51 includes a substantially rectangular flat plate-like surface portion 51a extending in the front-rear direction, and a side portion protruding inward from the both ends in the width direction of the surface portion (vertical direction according to FIG. 6A). Sliding contact projections 51c and 51c for sliding contact with the engaging member 40 are provided between the side portions 51b and 51b.

On the front side of the front portion 51a, a pressed portion 51a1 for protruding operation for protruding the writing portion 32 is provided. The protruding operation pressed portion 51a1 is formed to have an uneven cross section so as to prevent slipping when pressed by a finger or the like.
A slit 51a2 extending in the front-rear direction is provided on the center side in the width direction of the pressed portion 51a1 for protrusion operation (see FIG. 6). The slit 51a2 facilitates elastic deformation in the narrow direction of the side portions 51b and 51b, thereby improving the assembling property when the operation member 50 is inserted into the shaft tube 10 from the outer side of the shaft tube diameter. It has improved.

Further, near the rear end of the front portion 51a, there is provided an immersing operation pressed portion 51a3 for immersing the writing portion 32 in a protruding state, and on the back side of the immersing operation pressed portion 51a3, there is a shaft cylinder inside. A protrusion 51a4 that protrudes toward the center is provided.
The depressed portion 51a3 for immersion operation is provided with two notches 50a and 50a (see FIG. 6) extending in the front-rear direction at intervals in the width direction near the rear end portion of the operation member 50. It is provided in a plate shape between the notches 50a and 50a. The immersion operation pressed portion 51a3 bends inwardly when receiving a pressing force from the radially outer side.

The side portions 51b are formed in a substantially plate shape that protrudes inward from the both ends in the width direction of the front portion 51a and extends in the longitudinal direction of the axial tube.
A locking projection 51b1 and a backlash prevention projection 51b2 are provided on the outer surface of the side portion 51b.
As shown in FIG. 2 (II), the locking projection 51b1 has an outer surface inclined like a wedge toward the shaft cylinder, and the operating member 50 is inserted into the shaft cylinder along the shaft cylinder radial direction. At this time, the vehicle passes over the inner edge of the operation member through hole 11 and is locked inside the inner edge of the operation member through hole 11.
The backlash prevention protrusion 51b2 is a protrusion having a convex curved surface as shown in FIG. 6A. When the operation member 50 swings, the play prevention protrusion 51b2 is slidably contacted with the inner edge of the operation member through-hole 11 of the shaft tube 10 to operate. Prevent rattling in the width direction.

A plurality of sliding contact protrusions 51c are provided on the back surface of the operation member 50 (two in the illustrated example) at intervals in the width direction (see FIG. 6A). Each sliding contact protrusion 51c is formed in a triangular plate shape in side view having an inclined side that faces outward in a diagonally forward direction (see FIG. 6B).
When the front side of the operation member 50 swings inwardly of the shaft cylinder, the sliding contact projection 51c slides the inclined side to the sliding contact surface 41a of the engaging member 40 to advance the engaging member 40. .

Further, the support portion 52 is integrally connected to the rear end side of the pressed piece portion 51 having the above-described configuration and protrudes toward the inner side of the shaft cylinder, and supports the pressed piece portion 51 in a cantilever shape (see FIG. 6 (b)).
The support portion 52 is fitted with play on the inner surface of the peripheral wall so that the support piece 52 slides and finely moves on the inner surface of the peripheral wall of the shaft tube 10 as the pressed piece 51 swings.
More specifically, the support portion 52 has two first slidable contact portions 52a slidably contactable with the inner surface of the peripheral wall of the shaft tube 10 on the opposite side to the pressed piece portion 51 side in the shaft tube radial direction. 52a and two second slidable contact portions 52b slidably contactable with the inner surface of the peripheral wall of the shaft tube 10 on the pressed piece portion 51 side in the shaft tube radial direction (FIGS. 6A and 6B) (See FIG. 3 (IV)).

  The two first sliding contact portions 52a and 52a are provided at intervals in the width direction of the operation member 50, as shown in FIG. Each first slidable contact portion 52a is a projection formed in a convex curved surface shape so as to fit in a portion where the inner surface of the peripheral wall of the shaft tube 10 and the outer side of the guide convex portion 16a intersect (see FIG. 3 (IV)). The contact portion is slid when the operation member 50 swings.

  As shown in FIG. 3 (IV), the two second sliding contact portions 52b and 52b are provided at intervals in the width direction of the operation member 50. Each of the second sliding contact portions 52b is an edge portion near the operation member 50 on the rear end side of the support portion 52 (see FIG. 6B), and is a portion near the pressed piece portion 51 on the inner peripheral surface of the shaft cylinder 10. It forms so that it may adjoin or slidably contact with (refer to FIG. 3 (IV)).

The urging member 60 is a compression coil spring, the front end of which is in contact with the front opening 20, the rear end is inserted into the holding portion 41 of the engaging member 40, and the step portion in the holding portion 41 is inserted. The engaging member 40 and the refill 30 are urged rearward.
As another example of the urging member 60, the engaging member 40 and the refill 30 may be other urging members such as a tension spring and a leaf spring.

  The clip 70 integrally includes a clip main body 71 extending in the front-rear direction along the outer peripheral surface of the shaft cylinder, and a clip support portion 72 projecting inward from the rear end of the clip main body 71 toward the inner side of the shaft cylinder. 72 is inserted into the clip through-hole 12 in the peripheral wall of the shaft cylinder 10 and supported so as to be rotatable inside the inner surface of the peripheral wall (see FIGS. 1, 8, and 10).

  The clip main body 71 has an abutting portion 71 a that abuts the outer peripheral surface of the shaft cylinder on the front side of the clip support portion 72, and pulls the abutting portion 71 a away from the outer peripheral surface of the shaft cylinder on the rear side of the clip support portion 72. It has an opening / closing operation part 71b that is pressed at the time (see FIGS. 8A to 8C).

  The abutting portion 71 a is a curved projection protruding from the back surface of the clip body 71 toward the outer peripheral surface side of the shaft cylinder, and abuts on the surface of the clip immersing portion 13 of the shaft cylinder 10. In addition, this contact part 71a may be called a ball part.

On the back side of the opening / closing operation portion 71b, there are provided a recess 71b1 for inserting the resilient member 80 and a holding surface 71b2 for retaining the outer periphery of the resilient member 80 in the recessed portion 71b1 (FIGS. 8B and 8C). )reference).
The recess 71b1 is formed in a substantially cylindrical shape that follows the outer peripheral surface of the resilient member 80 that is a coil spring.
One or more holding surfaces 71b2 are provided on the inner peripheral surface of the recess 71b1 at intervals in the circumferential direction (two locations according to an example in FIG. 8). Each holding surface 71b2 is formed by partially forming the inner peripheral surface of the recess 71b1 into a flat surface, and is pressed against the outer peripheral surface of the elastic member 80.

Two clip support portions 72 are provided so as to protrude from the both ends in the width direction of the clip 70 to the inner side of the shaft cylinder. A shaft portion 72a serving as a fulcrum for the opening and closing operation of the clip 70 is provided on the outer side surface of each clip support portion 72 in the clip width direction (see FIGS. 8A to 8C).
The two clip support portions 72, 72 are elastically deformed in the direction of narrowing the clip width when inserted into the clip through hole 12 of the shaft tube 10 from the radially outer side, and the shaft portion 72a is penetrated through the clip. Get over the inner edge of the hole 12.

The shaft portion 72a is a protrusion that protrudes in the width direction from the side surface of the clip support portion 72 and has a clip surface portion side (upper side according to FIG. 8B) formed in an arc shape, and the arc-shaped portion is The shaft tube 10 is pressed against the inner surface of the peripheral wall of the shaft tube 10 in the clip through-hole 12 (specifically, inside the shaft tube of the notch 12a).
As shown in FIG. 4 (VII), an inclined surface 72a1 (FIG. 4 (VII)) which gradually narrows the clip width from the outside of the shaft tube diameter toward the inside of the clip through hole 12 is formed on the protruding end surface of the shaft portion 72a. Reference) is formed. The inclined surface 72a1 is in sliding contact with the guide inclined surface 17a of the locking projection 17 when the clip 70 is inserted into the shaft cylinder 10 from the radially outward direction, so that both the clip support portions 72, 72 are narrowed. Facilitates bending deformation.

  According to the illustrated example, the elastic member 80 is a compression coil spring. One end of the elastic member 80 abuts against the back surface of the opening / closing operation portion 71b of the clip body 71, and the other end contacts the inner surface of the peripheral wall in the shaft tube 10. It is made to contact and it repels in the direction which expands between the opening-and-closing operation part 71b and the axial cylinder 10. FIG.

Next, an example of a manufacturing procedure for the side knock type writing instrument having the above-described configuration will be described.
When the clip 70 is attached to the shaft tube 10, the elastic member 80 is attached in advance to the back surface side of the opening / closing operation portion 71 b of the clip 70. More specifically, if one end side of the elastic member 80 is inserted into the recess 71b1 (see FIG. 8) on the back surface of the clip 70, the outer peripheral portion of the elastic member 80 is pressed against the holding surface 71b2, and the elastic The member 80 is held so as not to fall off.
As shown in FIG. 1, the clip support portions 72, 72 are inserted into the clip through-hole 12 of the shaft tube 10 from the radially outer side of the clip 70 in a state where the elastic member 80 is held. As shown in FIG. 4 (VII), the clip support portions 72, 72 are formed by using both inclined surfaces 72a1 of the shaft portions 72a, 72a as guide inclined surfaces 17a, 17a of the locking projections 17, 17 on the inner peripheral surface of the shaft cylinder 10. Slid in contact with the wire and bent in the narrow direction. Then, the shaft portions 72a, 72a are moved over the locking projections 17, 17 and locked.
In this locked state, the abutment portion 71a on the front end side of the clip 70 abuts on the clip insertion portion 13 on the outer periphery of the shaft tube 10, and the elastic member 80 repels the opening / closing operation portion 71b in the radially outward direction. Therefore, the clip support portions 72 and 72 of the clip 70 are held by bringing the shaft portions 72a and 72a into contact with the locking projections 17 and 17 in the shaft tube 10 as shown in FIG. 4 (VII).

Further, when the refill 30 and the engaging member 40 are mounted in the shaft tube 10, the engaging member 40 and the biasing member 60 are fitted in advance to the refill 30, and these are the front end openings of the shaft tube 10. The front end 20 is screwed and connected to the front end of the shaft tube 10.
In the shaft tube 10, the engaging member 40 fits the guided portion 45 (see FIG. 7B) extending in the longitudinal direction of the shaft tube into the guide recess 16 b on the inner peripheral surface of the shaft tube 10 (FIG. 5 ( b) and FIGS. 2 to 4).

In the above procedure, the urging member 60 may be attached to the front end of the refill 30 after the refill 30 and the engaging member 40 are inserted into the shaft tube 10.
In addition, the operation of mounting the refill 30 and the engaging member 40 in the shaft tube 10 can be performed before the mounting operation of the clip 70 described above.

  Then, the operation member 50 is attached to the shaft tube 10. As shown in FIG. 1, in the operation member 50, the support portion 52 is inserted into the operation member through-hole 11 from the outer side of the shaft cylinder diameter. At this time, both the locking projections 51b1 and 51b1 get over the inner edge of the operation member through hole 11 so that the both side portions 51b and 51b bend inwardly. Then, both the locking protrusions 51b1 and 51b1 of the operating member 50 are locked to the inner edge of the operating member through-hole 11 from the inner side of the shaft tube 10, as shown in FIG. 2 (II). Further, in this inserted state, the support portion 52 is slidably in contact with the inner surface of the peripheral wall of the shaft tube 10 as the pressed piece portion 51 swings and slightly moves with respect to the inner surface of the peripheral wall. (See FIGS. 1 and 3 (III) and (IV)).

Next, the characteristic operational effects of the completed side knock type writing instrument will be described in detail.
As shown in FIGS. 9A and 9B, when the pressed piece 51 of the operating member 50 (specifically, the protruding operation pressed portion 51a1) is pressed toward the inner side of the shaft tube, While the pressing piece 51 swings inwardly of the shaft cylinder, substantially simultaneously with this swinging, the support portion 52 integral with the pressed piece 51 is applied by the force applied to the swing fulcrum side of the pressed piece 51. The shaft tube 10 is slidably contacted with the inner surface of the peripheral wall of the shaft tube 10 and is finely moved. If it demonstrates in detail, the support part 52 will rotate a little counterclockwise, sliding the 1st sliding contact part 52a a little to a shaft cylinder back, and will rock | fluctuate the to-be-pressed piece part 51 inside a shaft cylinder.
Then, the slidable contact surface 41a of the engaging member 40 is slidably contacted with the slidable contact projection 51c of the pressed piece 51 that swings inwardly of the shaft cylinder, so that the engaging member 40 and the refill 30 are advanced. A writing portion 32 at the front end of the refill 30 protrudes from the front end of the tip 20.
This protruding state is maintained by engaging / disengaging the engagement / disengagement piece 44 (specifically, the engagement / disengagement protrusion 44a) of the engagement member 40 with the engaged portion 15 on the inner peripheral surface of the shaft tube 10. Further, in this protruding state, the receiving piece 44b on the front end side of the engagement / disengagement piece 44 receives the inner surface of the pressed piece portion 51, thereby preventing the pressed piece portion 51 from easily flapping into and out of the shaft tube. Can do.

  Further, in the protruding state of the writing portion 32, when the depressed portion 51a3 for the immersing operation of the operating member 50 is pressed inwardly as shown by the two-dot chain arrow in FIG. The pressed portion 51a3 bends inwardly of the shaft cylinder, pushes the engagement / disengagement piece 44, and disengages the engagement / disengagement projection 44a of the engagement / disengagement piece 44 from the engaged portion 15 on the shaft tube 10 side. Then, the refill 30 and the engaging member 40 slide backward by the elastic force of the urging member 60, and the sliding contact surface 41 a of the engaging member 40 slides on the sliding contact projection 51 c of the pressed piece portion 51. Therefore, the operating member 50 returns to the original state (the state shown in FIG. 9A) by swinging the pressed piece portion 51 in the reverse direction while slightly rotating the support portion 52 in the reverse direction.

Therefore, according to the mounting structure of the operation member 50 described above, the pressed piece portion 51 is swung by the fine movement of the support portion 52. For example, the pressed piece portion is bent and swung. Compared with the structure or the like, the pressed piece 51 can be smoothly swung with a light pressing force.
In addition, since the support portion 52 serving as the swing fulcrum of the operation member 50 is disposed in the shaft tube, the operation member 50 has a structure that is provided with a swing fulcrum portion outside the shaft tube or around the shaft tube. The dimension that the front side protrudes from the outer peripheral surface of the shaft cylinder can be reduced, and thus it is possible to prevent the writing part from immersing the operating member 50 by touching the operating member 50 unintentionally during writing. it can.

  Further, as shown in FIGS. 10A and 10B, when a pressing force inside the shaft cylinder is applied to the opening / closing operation portion 71b on the rear end side of the clip 70, the clip 70 causes the shaft portion 72a to move to the inner periphery of the shaft cylinder. Rotate while sliding on the surface to open the space between the abutting portion 71a on the front end side of the clip 70 and the clip immersing portion 13 on the outer peripheral surface of the shaft tube 10, and immerse the opening / closing operation portion 71b into the shaft tube 10 Let Further, when the pressing force is removed, the front end side of the clip 70 is closed by the reverse operation.

  Therefore, according to the mounting structure of the clip 70 described above, since the clip support portion 72 is disposed in the shaft tube 10 and the pressed opening / closing operation portion 71b is inserted into the shaft tube 10, the clip body 71 is provided. The dimension of the front side of the tube 10 protruding from the outer peripheral surface of the shaft tube 10 can be made as small as possible, and as a result, a slim shaft tube design becomes possible, and a hand or the like touches the clip 70 during writing. Annoyance can be reduced.

  According to the illustrated example, the operation member 50 has the first sliding contact portion 52a disposed closer to the rear end. However, as another example of the operation member 50, the swingability during the release operation is improved. For this reason, the first sliding contact portion 52a may be arranged on the front side of the illustrated one.

  Also, according to the illustrated example, the engaging / disengaging protrusion 44a on the engaging member 40 side is engaged / disengaged with the recessed engaged portion 15 on the shaft tube 10 side, but these uneven relations may be reversed. Is possible.

  Further, according to the illustrated example, a compression coil spring is used as the resilient member 80 for urging the clip 70 in the closing direction. Other examples of the resilient member 80 include other elastic bodies such as rubber and leaf springs. It is also possible to use.

  Moreover, according to the said Example, although the writing part 32 which is a ball-point pen tip protrudes from the front-end 20 front end by operation which rocks | fluctuates the operation member 50 inside a shaft cylinder, as another example, the operation member 50 This includes a mode in which the writing portion, which is the front end portion of the mechanical pencil refill, is protruded from the front end of the front opening 20 by an operation of swinging the shaft inwardly.

  Moreover, the attachment structure of the clip 70 of the said Example can also be applied as an attachment structure of the clip provided in the axial cylinder of this cap in the writing instrument provided with the removable cap.

DESCRIPTION OF SYMBOLS 10: Shaft cylinder 11: Through-hole for operation members 12: Through-hole for clips 13: Clip immersion part 15: Engaged part 16b: Guide recessed part 30: Refill 32: Writing part 40: Engaging member 41a: Sliding contact surface 44: Engagement / removal piece 44a: Engagement / removal protrusion 50: Operation member 50a: Notch 51: Pressed piece 51a1: Pressed part for protrusion operation 51a3: Pressed part for immersion operation 51b1: Locking protrusion 51c: Sliding contact protrusion 52: support part 52a: first sliding contact part 52b: second sliding contact part 60: biasing member 70: clip 71: clip body 71a: contact part 71b: opening / closing operation part 71b1: recess 72: clip support part 72a: Shaft part

Claims (7)

A shaft cylinder and an operation member that is exposed to the outside through the pressed piece portion in the peripheral wall of the shaft cylinder, and the writing portion protrudes by an operation of swinging the pressed piece portion toward the inside of the shaft tube. In the side knock type writing instrument
The operating member includes the pressed piece portion provided to extend in the front-rear direction, and a support portion integrally connected to one end side of the pressed piece portion,
The support portion is fitted with play on the inner surface of the peripheral wall so that the support portion slides and finely moves on the inner surface of the peripheral wall of the shaft tube as the pressed piece portion swings. Side knock type writing instrument.   The said support part has a 1st slidable contact part which can be slidably contacted with the inner peripheral wall inner surface of the said axial cylinder in the reverse side with respect to the said to-be-pressed piece part side in an axial cylinder radial direction. Side knock type writing instrument.   3. The side knock type according to claim 2, wherein the support portion has a second slidable contact portion that can slidably contact the inner surface of the peripheral wall of the shaft tube on the pressed piece portion side in the shaft tube radial direction. Writing instrument.   4. The side knock type writing instrument according to claim 2, wherein the first sliding contact portion has a convex curved surface formed on a surface to be brought into sliding contact with the inner surface of the peripheral wall of the shaft cylinder. 5. The writing portion is protruded when the protruding operation pressed portion near the front end of the operation member is pressed, and the writing portion is immersed when the immersion operation pressed portion near the rear end of the operation member is pressed. A side-knock type writing instrument configured to allow
The pressed portion for immersion operation is provided near the rear end of the operation member with two notches extending in the front-rear direction at intervals in the axial direction of the shaft cylinder, and between the two notches inside the shaft cylinder. The side knock type writing instrument according to any one of claims 1 to 4, wherein the side knock type writing instrument is bent.   The pressed piece when swinging inwardly into the shaft cylinder is brought into sliding contact with a portion that can be moved forward and backward integrally with the writing portion, and the writing portion is advanced to protrude. The side knock type writing instrument according to claim 5. A refill provided so as to advance and retreat in the shaft cylinder; an engagement member integrally connected to the refill; and a biasing member that biases the refill and the engagement member rearward. A side-knock type writing instrument that causes the writing part at the front end of the refill to appear and disappear by advancing and retreating,
The engaging member includes a sliding contact surface that is slidably contacted with the inner surface of the operation member and pushed forward, and an engagement / disengagement piece that is engaged with the engaged portion of the inner peripheral surface of the shaft cylinder when it moves forward. Have
7. The immersing operation pressed portion is provided so as to press the engagement / disengagement piece and detach from the engaged portion when bent toward the inner side of the shaft tube. Side knock type writing instrument.

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