JP6267934B2 - Side knock type writing instrument - Google Patents

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 a swing fulcrum of the operating member (pressing piece 9), and the operating member (pressing piece 9) when swung is restored to the original by the biasing force of the torsion coil spring (10). Since the structure is restored to the position, man-hours are required for mounting the shaft (8) and the torsion coil spring (10) during manufacturing.

JP 2003-54187 A

  The present invention has been made in view of the above-described conventional circumstances, and a problem to be solved by the present invention is that the operation member is supported in a swingable manner with a simple structure, and the operation member at the time of swinging is returned to its original position. The object is to provide a side-knock type writing instrument that can be restored.

  One means for solving the above-described problems includes a shaft cylinder and an operation member exposed to the outside by inserting the pressed piece portion into the through hole of the peripheral wall of the shaft tube, and the pressed piece portion is disposed inside the shaft cylinder. In the side knock type writing instrument in which the writing part is projected by the swinging operation, the operation member is configured to extend forward with the front end side as a free end, and the pressed piece part. It has integrally an extended support portion that extends forward with an interval on the opposite side of the axial direction of the shaft cylinder, and a connection portion that connects the pressed piece portion and the extended support portion on the rear end side. The connecting portion and the extended support portion are held on the inner peripheral surface of the shaft cylinder.

  Since the present invention is configured as described above, the operation member can be swingably supported with a simple structure, and the operation member at the time of swinging can be restored to the original position.

It is an internal structure figure which shows an example of the side knock type writing instrument which concerns on this invention. The refill is indicated by a two-dot chain line with the internal structure omitted. (I) is an end view taken along line (I)-(I) in FIG. 1, (II) is an end view taken along line (II)-(II) in FIG. 1, and (III) is shown in FIG. FIG. 3 is an end view taken along line (III)-(III) of FIG. The refill is indicated by a two-dot chain line with the internal structure omitted. (IV) is an end view taken along line (IV)-(IV) in FIG. 1, and (V) is an end view taken along line (V)-(V) in FIG. The refill is indicated by a two-dot chain line with the internal structure omitted. (VI) is an end view taken along line (VI)-(VI) in FIG. 1, and (VII) is an end view taken along line (VII)-(VII) in FIG. The refill 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 an operation member, (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). 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 is indicated by a two-dot chain line with the internal structure omitted.

The first feature of the present embodiment is provided with a shaft cylinder and an operation member exposed to the outside by inserting the pressed piece portion into the through hole of the peripheral wall of the shaft tube, and the pressed piece portion to the inside of the shaft cylinder. In the side knock type writing instrument in which the writing part is projected by the swinging operation, the operation member is configured to extend forward with the front end side as a free end, and the pressed piece part. It has integrally an extended support portion that extends forward with an interval on the opposite side of the axial direction of the shaft cylinder, and a connection portion that connects the pressed piece portion and the extended support portion on the rear end side. The connecting portion and the extended support portion are held on the inner peripheral surface of the shaft tube.
According to this configuration, when the free end side of the pressed piece portion is pressed toward the inner side of the shaft cylinder by external pressure, the free end side of the pressed piece portion is elastically narrowed between the extended support portion and the inside of the shaft cylinder. Will bend. Moreover, when the external force with respect to a to-be-pressed piece part is removed, the free end side of a to-be-pressed piece part will return to an original state, spreading between an extension support part by an elastic restoring force. Therefore, the torsion coil spring for urging the pressed piece portion in the axial direction inside the shaft cylinder can be returned to the original state by urging the pressed piece portion in the axial direction with a simple structure. Etc. are not required.

As a second feature, the operation member is integrally molded so that a space between the front side of the pressed piece portion and the front side of the extended support portion is widened toward the front, It is elastically deformed so as to be narrowed and stored in the shaft tube.
According to this configuration, the urging force in the spreading direction between the pressed piece portion and the extended support portion can be effectively obtained.

As a third feature, a locking projection is provided on the front side of the pressed piece portion so as to abut against the inner peripheral surface of the shaft cylinder and restrict elastic restoration of the pressed piece portion in the radially outward direction. Is provided.
According to this structure, it can prevent that the front part side of a to-be-pressed piece part protrudes too much in a shaft cylinder diameter outward direction.

As a fourth feature, the connecting portion is brought into contact with the inner peripheral surface of the shaft tube on the pressed piece portion side in the shaft tube radial direction, and the front side of the extended support portion is moved in the coaxial tube diameter direction. It was made to contact | abut to a shaft cylinder inner peripheral surface on the opposite side.
According to this configuration, on the front side, the locking projection of the pressed piece comes into contact with the inner peripheral surface of the shaft tube, and the extended support portion comes into contact with the inner peripheral surface of the shaft tube on the opposite side in the radial direction. And in the rear part side, the to-be-pressed piece part side in a connection part is contact | abutted to the axial cylinder inner peripheral surface. The connecting member is stably supported without shaking in the shaft cylinder by the contact of these three locations. Therefore, for example, the operation member is loosely fitted with the inner peripheral surface of the shaft cylinder, compared with a structure in which the rear end side of the pressed piece portion is fixed and firmly fixed to the peripheral wall or inner peripheral surface of the shaft cylinder. With the structure, it can be stably held, and as a result, it becomes easy to improve workability when assembling the operation member to the shaft cylinder at the time of manufacture.

As a fifth feature, when the protruding operation pressed portion near the front end of the operation member is pressed, the writing portion is protruded, and the immersion operation pressed portion near the rear end of the operating member is pressed. A side knock type writing instrument configured to immerse the writing part at the time, wherein the pressed part for immersing operation has a notch part extending in the front-rear direction near the rear end part of the pressed piece part in the width direction. Two are provided at intervals, and the space between the two notches is bent toward the inner side of the shaft cylinder.
According to this configuration, since the pressed portion for the immersing operation flexes flexibly, the operability when immersing the writing portion is good.

As a sixth feature, a refill provided so as to advance and retreat in the shaft cylinder, an engaging member integrally connected to the refill, and a biasing member that biases the refill and the engaging member backward. 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 to the inner surface side of the pressed piece portion A sliding contact surface to be pushed and an engagement / disengagement piece to be engaged with an engagement portion of the inner peripheral surface of the shaft cylinder when it moves forward; In this case, 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.

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, on the front side and the rear side of the peripheral wall of the shaft tube 10 in the illustrated example, the operation member through hole 11 for allowing the operation member 50 to penetrate in the radial direction and the clip 70 are penetrated in the radial direction. 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 is a substantially rectangular hole penetrating in the radial direction near the rear end of the peripheral wall of the shaft tube 10, and as shown in FIG. 1, the clip support portion 72, the opening / closing operation portion 71 b and the elastic member of the clip 70. The firing member 80 is inserted into the shaft tube 10.

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
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).
The clip immersing portion 13 immerses the clip main body 71 in the axial direction of the shaft cylinder, and reduces the dimension of the clip main body 71 protruding from the outer peripheral contour of the shaft cylinder 10.

  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.

In addition, 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 FIG. 5).
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 16 a is a substantially rail-like protrusion that continues in the front-rear direction, and is provided in a range in the front-rear direction that contacts at least the operation member 50.
The extended support portions 52 of the operation member 50 are fitted to both sides of the two guide convex portions 16a and 16a in the clip width direction (see FIG. 2 (III)).

The guide recess 16 b is a recess that continues in the front-rear direction, and is provided in a range in the front-rear direction at least in sliding contact with the engagement member 40. The guide recess 16b in the illustrated example is located between the two guide protrusions 16a and 16a in the front-rear direction range of the operation member through-hole 11 as shown in FIGS.
An engagement member 40 described later is fitted into the guide recess 16b and guided in the front-rear direction.

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.
Further, reference numeral 10a2 in FIGS. 1 and 5 is an engaged hole that engages with the engagement protrusion 52a on the front end side of the extended support portion 52 in the operation member 50, and the engagement protrusion 52a is free to play back and forth. Fit in the state you have.

  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 be moved forward and backward integrally with the writing unit 32, and as shown in FIG. An extended connection portion 42, a press-fit portion 43 that is connected to the rear end of the connection portion 42 and is detachably press-fixed to the rear end of the refill 30, and protrudes from the press-fit portion 43 toward the operation member 50. The engagement / disengagement piece 44 and the guided portion 45 fitted into the guide recess 16b on the inner peripheral surface of the shaft tube 10 are integrally molded from a flexible synthetic resin material. 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 inserted through the refill 30 and is slidably contacted with the pressed piece portion 51 of the operation member 50 when the operation member 50 is 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 slidable contact surface 41a is formed in a convex curved shape facing the rear oblique operation member 50 side, and receives a plurality of slidable contact projections 51c and 51c (see FIG. 6) of the operation member 50.

  The connection part 42 is formed in a long shape extending rearward along the part on the anti-refill 30 side on the inner peripheral surface of the shaft tube 10, and the press-fitting part 43 is connected to the rear end thereof (see FIG. 7). .

  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 for receiving the pressed piece 51 of the operation member 50 from the inner side of the shaft cylinder (see FIG. 8B). 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 recessed portion 16b on the inner peripheral surface of the shaft tube 10. Are slidably fitted in the front-rear direction (see FIGS. 2 to 4). 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, as shown in FIG. 6, the operation member 50 includes a pressed piece portion 51 extending forward in a cantilever shape with the front end side as a free end, and a shaft cylinder radial direction with respect to the pressed piece portion 51. The extended support portion 52 extended forward while being spaced apart on the opposite side (lower side according to FIGS. 1 and 6), the pressed piece portion 51, and the extended support portion 52 are connected to the rear ends thereof. It is formed in a substantially U-shape in a side view in a side view integrally having a connection portion 53 connected on the side.
The operating member 50 is integrally molded so that the space between the pressed piece 51 and the extended support 52 is widened forward (see FIG. 6B), and is elastically deformed to narrow the gap. Are housed in the shaft cylinder 10 (see FIG. 1).

  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. Each sliding contact protrusion 51c is a protrusion having an inclined surface that inclines in the forward oblique diameter outward direction.

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, a depressed portion 51a3 for immersion operation for immersing the protruding writing portion 32 is provided.
The depressed portion 51a3 for immersion operation is provided with two notches 50a, 50a (see FIG. 6) extending in the front-rear direction at intervals in the width direction along the circumferential direction of the shaft cylinder, near the rear end portion of the operation member 50. Thus, a plate-like shape is provided between the two 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 is provided on the outer surface of each side 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 inner edge of the operation member through hole 11 is crossed and locked to the inside.

Further, two extending support portions 52 are provided at a distance from the pressed piece portion 51 in the axial tube diameter direction and at an interval in the width direction of the operation member 50 (FIGS. 6 and 2 (III )reference).
Each extending support portion 52 extends forwardly from a connecting portion 53 described later, and according to the illustrated example, has approximately half the length of the pressed piece portion 51. The engaging projection 52a fits into the engaged hole 10a2.

  The connecting portion 53 is a portion that connects the rear end side of the pressed piece portion 51 and the rear end side of each extended support portion 52.

The operating member 50 has the connecting portion 53 and the extended support portion 52 in a state where the pressed piece 51 is inserted through the operating member through hole 11 (see FIG. 5) of the shaft tube 10 and exposed to the outside. The shaft tube 10 is held on the inner peripheral surface.
More specifically, the operation member 50 causes the locking protrusion 51b1 on the front side of the pressed piece 51 to abut on the inner peripheral surface of the shaft cylinder (see FIG. 2 (II)), and the operation member of the connection portion 53 The end 53a on the through-hole 11 side is brought into contact with the inner peripheral surface of the shaft cylinder 10 (see FIG. 3 (V)), and a portion slightly behind the engaging protrusion 52a on the front side of the extended support portion 52 is formed. The shaft cylinder inner circumferential surface (specifically, the rear end inner edge of the engaged hole 10a2) is held in contact with the opposite side in the shaft cylinder radial direction.

The urging member 60 is a compression coil spring. The front end of the biasing member 60 is in contact with the front opening 20, and the rear end is inserted into the holding portion 41 of the engaging member 40. The engagement member 40 and the refill 30 are urged rearward in contact with the stepped portion.
As other examples of the urging member 60, other urging members such as a spring for pulling the engaging member 40 and the refill 30 rearward or a leaf spring can be used.

  As shown in FIG. 1, 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 protruding from the rear end of the clip main body 71 toward the inner side of the shaft cylinder. The clip support portion 72 is inserted into the clip through hole 12 of the peripheral wall of the shaft tube 10 and is rotatably supported inside the inner surface of the peripheral wall, and the opening / closing operation portion on the rear side of the clip body 71 By pressing 71b, the space between the abutting portion 71a (sometimes referred to as a ball portion) on the front end side of the clip body 71 and the clip insertion portion 13 on the outer periphery of the shaft tube 10 is opened.

  Further, according to the illustrated example, the elastic member 80 is a compression coil spring, one end of which is brought into contact with the back surface of the opening / closing operation portion 71b of the clip body 71, and the other end thereof is the inner surface of the peripheral wall in the shaft tube 10. And is repelled in the direction of expanding the space between the opening / closing operation part 71b and the shaft tube 10.

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. As shown in FIG. 1, the clip 70 is inserted from the radially outer side into the clip through hole 12 of the shaft tube 10 and is supported in the shaft tube 10.

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. 2). (See FIG. 4).

In the above procedure, the urging member 60 may be attached to the engaging member 40 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, the extended support portion 52 of the operation member 50 is inserted into the operation member through-hole 11 from the outer side of the shaft tube 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, as shown in FIG. 2 (II), both the locking projections 51b1 and 51b1 of the operation member 50 are locked to the inner edge of the operation member through-hole 11 from the inner side of the shaft tube 10, and are extended and supported as described above. The part 52 and the connection part 53 are held in the shaft tube 10.

Next, the characteristic operational effects of the completed side knock type writing instrument will be described in detail.
As shown in FIGS. 8 (a) and 8 (b), when the pressed piece 51 (specifically, the protruding operation pressed portion 51a1) of the operation member 50 is pressed toward the inner side of the shaft cylinder, The pressing piece 51 swings inwardly from the shaft cylinder. At this time, the space between the pressed piece portion 51 and the extended support portion 52 is elastically narrowed (see FIG. 8B).
Then, the slidable contact surface 41a of the engagement member 40 is slidably contacted with the inclined surface of the slidable contact projection 51c of the pressed piece portion 51 that swings inwardly of the shaft cylinder, so that the engagement member 40 and the refill 30 are brought into contact with each other. It advances, and the writing part 32 of 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.
In this projecting state, when the pressing force against the pressed piece 51 is removed, the pressed piece 51 is moved by an elastic restoring force as shown by a two-dot chain line in FIG. Although it returns to the original position, the engagement state is maintained by the engaging / disengaging piece 44.

  In addition, when the immersing operation pressed portion 51a3 of the operating member 50 is pressed inwardly in the protruding state of the writing portion 32, the immersive operation pressed portion 51a3 bends inwardly of the axial tube, and the engagement / disengagement piece. 44 is pushed, and the engagement / disengagement protrusion 44a of the engagement / disengagement piece 44 is removed 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. At this time, since the pressed piece 51 is returned to the original position by an elastic restoring force, there is no friction between the sliding contact surface 41a and the pressed piece 51, and the engagement member 40 is smoothly retracted. is there.

  Therefore, according to the side knock type writing instrument having the above-described configuration, the pressed piece 51 is swingably supported with a simple structure that does not use a shaft member, a torsion coil spring, or the like, and is restored to the original state after the pressing operation. can do. Moreover, manufacturability when the operation member 50 is mounted is also good.

  In addition, according to the said Example, although it was set as the structure (refer FIG. 8) which engages / disengages the engaging / disengaging protrusion 44a by the side of the engaging cylinder 40 with the concave to-be-engaged part 15 by the side of the axial cylinder 10, these uneven | corrugated relations It is also possible to reverse.

  Moreover, in the said Example, although the operation member 50 was shape | molded as an especially preferable aspect so that the space between the to-be-pressed piece part 51 and the extended support part 52 might spread toward the front, It is also possible to adopt a mode in which the operation member 50 is molded substantially in parallel.

  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 It is also possible to adopt a mode in which the writing portion, which is the front end portion of the mechanical pencil refill, protrudes from the front end of the front end 20 by an operation of swinging the inner side of the shaft cylinder.

DESCRIPTION OF SYMBOLS 10: Shaft cylinder 11: Through hole for operation members 12: Through hole for clips 13: Clip immersion part 15: Engaged part 20: Front opening 30: Refill 31: Ink tank 32: Writing part 40: Engagement member 41: Holding portion 42: Connection portion 43: Press-fit portion 41a: Sliding contact surface 44: Engaging / removing piece 44a: Engaging / removing protrusion 50: Operation member 50a: Notch portion 51: Pressed piece portion 51a: Front portion 51a1: Cover for protruding operation Pressing portion 51a3: Pressed portion for immersion operation 51b1: Locking projection 51c: Sliding contact projection 52: Extension support portion 52a: Engaging projection 53: Connection portion

Claims (6)

A shaft cylinder and an operation member that is exposed to the outside by inserting the pressed piece into the through-hole in the peripheral wall of the shaft cylinder, and the writing portion protrudes by an operation of swinging the pressed piece inside the shaft cylinder. In the side knock type writing instrument
The operating member includes the pressed piece portion extending forward with the front end side as a free end, and an extension extending forward with an interval on the opposite side of the axial tube radial direction with respect to the pressed piece portion. And a connecting portion that connects the pressed piece portion and the extended support portion on the rear end side, and the connecting portion and the extended support portion are held on the inner peripheral surface of the shaft tube. A side-knock type writing instrument.   The operation member is integrally molded so that a space between the front side of the pressed piece portion and the front side of the extended support portion spreads forward, and is elastically deformed to narrow the space. The side knock type writing instrument according to claim 1, wherein the side knock type writing instrument is housed in the shaft cylinder.   A locking projection is provided on the front side of the pressed piece portion so as to abut against the inner peripheral surface of the shaft cylinder and restrict elastic recovery of the pressed piece portion in the radially outward direction. The side knock type writing instrument according to claim 2.   The connecting portion is brought into contact with the inner peripheral surface of the shaft cylinder on the pressed piece portion side in the axial tube radial direction, and the front portion side of the extended support portion is connected to the inner periphery of the shaft tube on the opposite side in the coaxial tube radial direction. 4. The side knock type writing instrument according to claim 3, wherein the side knock type writing instrument is brought into contact with a surface. 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 with two notches extending in the front-rear direction and spaced in the width direction near the rear end of the pressed piece portion, and the inside of the shaft cylinder is formed between the two notched portions. The side knock type writing instrument according to any one of claims 1 to 4, wherein the side knock type writing instrument is bent. 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 to the inner surface side of the pressed piece portion and pushed forward, and a latch that is locked to the engaged portion of the inner peripheral surface of the shaft cylinder when it moves forward. With debris,
6. 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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