JP2006021518A - Mechanical pencil, ball-point pen, and writing instruments - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mechanical pencil capable of lessening resistance caused by sliding a lead tank in an axial direction of an outer casing while pressing an operation switch exposed out of the side opening of the outer casing. <P>SOLUTION: The mechanical pencil includes a through-hole 18b which the lead tank 5 passes through, a guide member 18 installed inside of the outer casing 1, the switch 15 exposed out of the opening 14 formed on the side of the outer casing and operable by a thumb or an index finger while holding the mechanical pencil 3, and a lead tank moving member 20 comprising a joint 16 connected to the lead tank 5. The joint 16 installed closer to a tip 2 than the guide member 18 changes its position against the guide member 18 in the direction of the axis line of the lead tank 5, and a lead is let out by sliding the lead tank 5 with respect to the outer casing 1 with the operation of the switch 15. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mechanical pencil, a ballpoint pen, and a writing instrument combining these.

  A mechanical pencil that feeds the lead from the tip attached to the tip of the outer cylinder by sliding the lead tank attached to the tip of the chuck that can clamp the lead in the axial direction of the lead tank with respect to the outer cylinder is known. .

  As a method of sliding the lead tank with respect to the outer cylinder, a knock protruding from the outer cylinder is provided at the rear end of the lead tank, and the lead tank is slid by operating the knock with the thumb, or a mechanical pencil is shaken. There is known a method of causing a weight body to act on the lead tank and thereby sliding the lead tank.

  In the so-called knock-type mechanical pencil in which a knock protruding from the outer cylinder is provided at the rear end of the lead tank and the knock is operated with the thumb, there is an inconvenience of changing the mechanical pencil every time the lead is extended. It is convenient if the lead can be extended by operating with the thumb or index finger while holding the mechanical pencil. A mechanical pencil in which an operation switch is exposed from an opening window on the side surface of the outer cylinder instead of providing a knock protruding from the rear end of the outer cylinder is also known.

For example, Patent Document 1 discloses a mechanical pencil in which an opening for exposing a weight body is formed on a side surface of an outer cylinder, and the weight body can be operated with the thumb or index finger from the opening.
JP 2000-318373 A

In a mechanical pencil of which the operation switch is exposed from the opening window on the side surface of the outer cylinder, the core tank is slid in the axial direction of the outer cylinder while pressing the operation switch exposed from the opening window. However, the force of pressing the operation switch becomes a resistance when the lead tank is slid in the axial direction, which causes a problem of increasing the frictional force.
This problem also applies to a ballpoint pen in which the operation switch is exposed from the opening window on the side surface of the outer cylinder.

  Therefore, the present invention provides a writing instrument that moves the lead tank or ballpoint pen feeler in the axial direction of the outer cylinder while pressing the operation switch exposed from the opening window on the side surface of the outer sleeve, and slides the lead tank or ballpoint pen feeler in the axial direction. An object of the present invention is to provide a writing instrument that can reduce the resistance.

  Another object of the present invention is that even when an operation switch exposed from the opening window on the side surface of the outer cylinder is provided, the operation switch does not get in the way during writing and is easy to operate when the lead is extended. An object is to provide an operation switch.

  By the way, there is disclosed a two-function integrated mechanical pencil in which one mechanical pencil and another mechanical pencil are connected by a coupling tool so that the cores of both mechanical pencils are coaxial (see Patent Document 2). ). However, the mechanical pencil lead tank requires a length for inserting the auxiliary lead, and simply combining two mechanical pencils will increase the axial length of the mechanical pencil. .

Therefore, another object of the present invention is to provide a writing instrument that can shorten the length of the writing instrument in the axial direction even if the writing instrument is a combination of two mechanical pencils or ballpoint pens.
Japanese Utility Model Publication No. 1-165295

  The present invention will be described below. In order to facilitate understanding of the present invention, reference numerals in the accompanying drawings are appended in parentheses, but the present invention is not limited to the illustrated embodiments.

  In order to solve the above-mentioned problem, the invention of claim 1 is characterized in that the core tank (5) to which the chuck (6) capable of clamping the core is attached at the tip is connected to the axis of the core tank (5) with respect to the outer cylinder (1). In the mechanical pencil (3) for feeding the lead from the tip (2) attached to the tip of the outer cylinder (1) by sliding in the direction, the lead tank (5) has a through hole (18b) through which the lead tank (5) passes. And a guide member (18) attached to the inside of the outer cylinder (1) and an opening (14) on the side surface of the outer cylinder (1), and a thumb or A lead tank moving member (20) having an operating part (15) operable with an index finger and a connecting part (16) connected to the lead tank (5), the lead tank moving member (20 ) Said connecting part 16) is arranged at a position different from the guide member (18) in the axial direction of the core tank (5) and closer to the tip (2) than the guide member (18), A lead is drawn out from the tip (2) by sliding the lead tank (5) with respect to the outer cylinder (1) using an operation part (15).

  According to a second aspect of the present invention, in the mechanical pencil according to the first aspect, the guide member (18) guides the lead tank moving member (5) to slide relative to the guide member (18). Guide portions (18a, 18e) are formed.

  According to a third aspect of the present invention, in the mechanical pencil (3) according to the second aspect, the guide member (18) includes a main body (18c) in which the through hole (18b) is formed, and the main body (18c). ) And a flexible portion (18d) having a substantially arc-shaped cross section that protrudes from the outer cylinder (1), and the guide member (18) can be attached to the outer cylinder (1). An engagement convex part (19) is formed on one of the flexible part (18d) and the outer cylinder (1), and the flexible part (18d) and the outer cylinder (1) of the guide member (18) are formed. The other is characterized in that an engagement recess is formed that fits into the engagement projection (19).

  According to a fourth aspect of the present invention, in the mechanical pencil according to the second or third aspect, the lead tank moving member (20) is connected to the guide portion (18a, 18e) from the connecting portion (16). It has a guided part (17) protruding in the axial direction of the core tank, and has a step that increases the hole diameter toward the bottom by attaching the guided part (17) to the connecting part (16). An operation switch mounting hole (21) is formed, and a hook piece (15b) that engages with the step is formed in the operation portion (15).

According to a fifth aspect of the present invention, the tip (32) is attached to the tip of the outer cylinder (1) by sliding the ball pen refill (33) with respect to the outer cylinder (31) in the axial direction of the ball pen refill (33). The ballpoint pen refill (33) from the tip of the ballpoint pen (33) has a through hole (18b) through which the ballpoint pen refill (33) passes, and a guide member (18) attached to the inside of the outer cylinder (31); A connecting portion (15) that is exposed from the opening on the side surface of the outer cylinder (31) and has an operation portion (15) that can be operated with the thumb or index finger while holding the ballpoint pen, and that is connected to the ballpoint pen refill (33). 16) having a ballpoint pen refill movement member (15, 16, 17), and the ballpoint pen refill movement member (15) 16, 17) the connecting portion (16) is different in position in the axial direction of the ball-point pen refill (33) with respect to the guide member (18), and more than the guide member (18). The ballpoint pen refill (33) is arranged from the tip (32) by sliding the ballpoint pen refill (33) with respect to the outer cylinder (31) using the operation portion (15). It is characterized by extending the tip of the.

  The invention of claim 6 includes a pair of mechanical pencils (5) having a lead tank (5) to which a chuck capable of clamping a lead is attached to the tip, and feeding the lead from a tip (43) attached to the tip of the outer cylinder (44). 41), or a combination of a pair of ballpoint pens that project the tip of the ballpoint pen refill from the tip attached to the tip of the outer tube by sliding the ballpoint refill relative to the outer tube in the axial direction of the ballpoint pen refill, or A chuck that can clamp the lead has a lead tank attached to the tip, a mechanical pencil that feeds the lead from a tip attached to the tip of the outer tube, and a ball pen refill that slides in the axial direction of the ball pen refill with respect to the outer tube From the tip attached to the tip of the outer cylinder. The tip of the pair of mechanical pencils (41), the tip of the pair of ballpoint pens (43), the tip of the pair of ballpoint pens, or the tip of the pencil and the ballpoint pen are combined at both ends of the writing tool. The outer cylinder (44) of the pair of mechanical pencils, the outer cylinder of the pair of ballpoint pens, or the outer cylinder of the mechanical pencil and the outer cylinder of the ballpoint pen are connected by a connector (42). In the writing instrument, the tip of the lead tank (5) of the pair of mechanical pencils (41), the tip of the ball pen refill of the pair of ball pens, or the tip of the lead tank of the pair of mechanical pencils and the ball pen refill of the ball pen The tip portions are arranged so that their axis lines substantially coincide with each other, and the pair of mechanical pencils (41) The tanks (5), or the ballpoint pen refills of the pair of ballpoint pens, or the lead pencil lead tank and the ballpoint pen of the ballpoint pen are overlapped with each other in the axial direction so that the axial length of the writing instrument can be shortened, A writing instrument characterized by inflating the outer cylinder (44) in the vicinity of the rear end of the lead tank (5) of the mechanical pencil (41) or in the vicinity of the rear end of the ballpoint pen refill solves the above-described problems. To do.

  According to a seventh aspect of the present invention, in the writing instrument according to the sixth aspect, the mechanical pencil has a through hole (18b) through which the core tank (15) passes, and is attached to the inside of the outer cylinder (44). The lead tank (15) has a guide member (18) and an operation part (15) exposed from the opening of the outer cylinder (44) and operable with a thumb or forefinger with a mechanical pencil. A lead tank moving member (15, 16) having a connecting part (16) to be connected, and the connecting part (16) of the lead tank moving member (15, 16) is connected to the guide member (18). On the other hand, the position of the lead tank (15) is varied in the axial direction and is arranged closer to the tip (43) than the guide member (18), and the operating portion (15) is connected to the outer cylinder (44). Slide against The lead is drawn out from the tip (43) attached to the tip of the outer cylinder (44), and the ballpoint pen has a through hole through which the ballpoint pen refill penetrates and is attached to the inside of the outer cylinder. A ball pen refill moving member that has an operation portion that is exposed from the opening of the outer cylinder and that can be operated with the thumb or index finger while holding the ballpoint pen, and that has a connection portion that is connected to the core tank. The connecting portion of the ball-point pen refill movement member is disposed at a position different from the guide member in the axial direction of the ball-point pen refill and on the tip side of the guide member, and the operation portion is The tip of the ball-point pen refill is taken out from the tip by sliding on the outer cylinder.

The invention according to claim 8 is an operation switch (61) whose shape can be changed between a retracted state stored in the opening (14) opened in the case (1) and a protruding state protruding from the opening (14).
, 81, 101), a base (65), a first side surface (66) rotatable with respect to the base (65) around one side (66a) of the base side, and the first A second side surface portion (67) that is rotatable with respect to the first side surface portion (66) about the other side (66b) facing the one side (66a) on the base side of the side surface portion (66). And a hook (71) provided on at least one of the first side surface portion (66) and the second side surface portion (67) and engaged with an edge of the opening (14), The second side surface portion (67) is such that one side (67a) of the base side is slidable with respect to the base (65), and the engagement between the edge of the hook (71) and the opening portion (14) is released. The base (65), the first side surface (66) and the second side surface ( 7) When the three-dimensional side surface shape formed by 7) is triangular, and the edge of the hook (71) and the opening (14) is engaged, the first side surface (66) and the second side A side part (67) is arrange | positioned on substantially one plane, It is characterized by the above-mentioned.

  According to a ninth aspect of the present invention, in the operation switch according to the eighth aspect, when the hook (71) and an edge of the opening (14) are engaged, the first side surface (66) is elastically deformed. ) And the second side surface portion (67) are disposed on substantially one plane, while the hook (71) and the edge of the opening (14) are disengaged, The elastic member (72, 91, 146) which restores and makes the three-dimensional side surface shape formed by the base (65), the first side surface portion (66) and the second side surface portion (67) triangular. ) Is provided.

  According to a tenth aspect of the present invention, in the operation switch according to the eighth aspect, the first cover portion (73) closely contacting the outside of the first side surface portion (66) and the second side surface portion (67). A second cover portion (74) closely contacting the outside of the first cover portion (73), a side (73a) of one end in the width direction of the first cover portion (73), and one end in the width direction of the second cover portion (74). The width of the first connecting part (75) for connecting the side (74a), the side (73b) at the other end in the width direction of the first covering part (73), and the width of the second covering part (74) An elastic cap (72, 91) having a second connecting portion (76) for connecting the other end side (74b) in the direction, and the elastic cap (72, 91) is connected to the hook (71). When the edge of the opening (14) is engaged, the first side surface (66) and the second side surface (67) are elastically deformed. While being allowed to be disposed on substantially one plane, when the hook (71) and the edge of the opening (14) are disengaged, the base (65) and the first are restored. The three-dimensional side surface formed by the side surface portion (66) and the second side surface portion (67) has a triangular shape.

  According to an eleventh aspect of the present invention, in the operation switch according to the eighth to tenth or ninth aspect, a notch (62, 79) is provided at an edge of the opening (14) of the case (1), and the operation switch When (61) is slid from the rear end position to the front end position with respect to the case (1) and the hook (71) is moved to the position of the notches (62, 79), the hook (71) and the opening are moved. The operation of the projecting state in which the engagement with the edge of the portion (14) is released, the shape of the operation switch (61) changes from the retracted state to the projecting state, and the spring (9) returns to the rear end position again. When the switch (61) is pressed, the hook (71) and the edge of the opening (14) are engaged, and the shape of the operation switch (61) changes from the protruding state to the retracted state. To do.

  According to a twelfth aspect of the present invention, in the operation switch according to the tenth or eleventh aspect, the one side (83a, 84a) and the other end of the first and second side surfaces (83, 84) in the width direction are provided. In the side (83b, 84b), the first and second side surface parts (83, 84) are opposite from the one side (83c) of the base side to the other side (83d) of the base side (83d). , 84d), a step (86) is formed so that the width becomes narrower, and the first and second connection portions (92) of the elastic cap (91) are also formed in the first and second connection portions (92). A connecting portion step (93) corresponding to the step (86) of one side (83a, 84a) and the other end (83b, 84b) in the width direction of the two side surface portions (83, 84) is formed. It is characterized by that.

  According to the first aspect of the present invention, the force that pushes the operating portion is transmitted to the lead tank via the connecting portion and distributed to the vicinity of the front chuck and the rear guide member. For this reason, the resistance at the time of sliding the lead tank in the axial direction can be reduced, and the lead tank can be moved in the axial direction with a light force. Even if the operation unit is pushed with a strong force, the lead tank is slightly bent, so that the strong force can be released and the strong force is not transmitted to the guide member as it is.

  According to the invention of claim 2, when the operation unit is slid, the operation unit is not shaken or dented.

  According to invention of Claim 3, a guide member can be easily inserted in an outer cylinder by bending the flexible part of a guide member inside. When the flexible portion is restored, the engaging convex portion fits into the engaging concave portion, so that the guide member can be fixed to the outer cylinder.

  According to invention of Claim 4, an operation part can be attached to an operation switch attachment hole through the opening window of an outer cylinder. Further, the operation switch mounting hole can be easily manufactured by separating the intermediate plate and the main body.

  The present invention can be applied to a ballpoint pen as in the fifth aspect of the invention, and therefore the resistance when sliding the ballpoint pen refill in the axial direction can be reduced.

  According to invention of Claim 6, the full length of a writing instrument can be shortened. Moreover, since the outer cylinder is partially inflated, a writing instrument that is easy to hold can be obtained.

  According to the seventh aspect of the present invention, the length from the guide member to the tip of the tip tool (the portion where the center lines of the core tanks on both sides of the writing instrument are matched) can be shortened, and the core tanks are axially aligned. It becomes easy to overlap.

  According to the invention of claim 8, there can be obtained an operation switch whose shape can be changed between a retracted state stored in an opening opened in the case and a protruding state protruding from the opening. Further, the operation switch can be changed between the retracted state and the protruding state with few operations.

  According to the ninth aspect of the present invention, the operation switch can be changed between the retracted state and the protruding state by utilizing elastic deformation and restoration of the elastic member.

  According to the invention of claim 10, the operation switch can be changed between the retracted state and the protruding state by utilizing the elastic deformation and restoration of the elastic cap.

  According to the invention of claim 11, the operation switch can be changed from the retracted state to the protruding state by simply sliding the operation switch with respect to the case. Moreover, it can be set in the retracted state by simply pushing the operation switch in the protruding state manually.

  According to the invention of claim 12, when the operation switch is in the retracted state, the step portions of the first and second connecting portions of the elastic cap are folded back. For this reason, even if the operation switch is stored, the elastic cap does not bump.

  Hereinafter, an embodiment of the mechanical pencil of the present invention will be described with reference to FIGS. 1 to 6.

  As shown in FIG. 1, a pipe-shaped core tank 5 that accommodates a core 4 is provided inside a mechanical pencil 3 that includes an outer cylinder 1 and a tip 2 that is detachably screwed to a distal end portion of the outer cylinder 1. Is provided. A chuck 6 that can clamp the lead 4 is attached to the tip of the lead tank 5. By moving the lead tank 5 in the axial direction of the lead tank 5 with respect to the outer cylinder 1, the lead is fed out from the tip 2.

  On the front end side of the mechanical pencil 3, a lead feeding mechanism 12 that feeds the lead and a slide mechanism 13 that slides the lead tank 5 in the axial direction are provided. First, the core feeding mechanism 12 will be described.

  Various mechanisms have been conventionally used for the core feeding mechanism 12, and an example thereof will be described here. Of course, it is not limited to this example as long as the lead can be drawn out by sliding the lead tank.

  The chuck 6 has three chuck pieces having elastic force by a plurality of, for example, three slits extending rearward from the front end thereof. The outer periphery of the chuck 6 is formed into a taper whose outer shape is gradually narrowed from the front end toward the rear. When the chuck is fitted into the tightening ring, a strong tightening force is generated, and the chuck clamps the core with this force.

  A collar portion 7 is formed behind the chuck 6. A spring 9 for biasing the core tank 5 and the chuck 6 backward is interposed between a spring receiving seat 8 and a collar portion 7 sandwiched between the outer cylinder 1 and the tip 2. The fastening ring 10 is fitted to the outer periphery of the chuck 6 and can be moved back and forth in a groove formed between the spring seat 8 and the tip 2.

  When the chuck 6 is advanced together with the core tank 5 against the force of the spring 9, the fastening ring 10 advances together with the chuck 6 tightened until the fastening ring 10 contacts the front end of the groove. For this reason, the chuck 6 moves forward with the core clamped. Then, after the fastening ring 10 reaches the front end of the groove, when the chuck 6 is further advanced, the chuck 6 is released from the fastening ring 10. For this reason, the chuck piece is expanded by its elastic force, and the clamping force for the core is released. Thereafter, when the lead tank 5 is moved backward by the force of the spring 9, the chuck 6 starts to retreat from the front end position where the lead is opened. Until the tightening ring 10 comes into contact with the rear end of the groove, the tightening ring 10 moves backward together with the chuck 6. Therefore, the chuck 6 moves backward from the front end position where the core is opened by a certain distance while being open. Therefore, the core 4 is left in a position where it is drawn forward by the chuck 6. When the fastening ring 10 comes into contact with the spring seat 8, the chuck 6 is fitted to the fastening ring 10 by the force of the spring 9. At this time, since the fastening ring 10 fastens the chuck 6, the chuck 6 clamps the core 4 with a strong force.

  The core 4 can be fed out from the tip of the tip 2 by a substantially constant amount by using the above-described back-and-forth movement of the chuck 6 and the clamping and releasing operation.

  Next, the slide mechanism 13 for moving the lead tank 5 in the axial direction will be described. FIG. 2 is a perspective view of the slide mechanism 13 incorporated in the outer cylinder 1, and FIG. 3 is an exploded perspective view of the slide mechanism 13. An operation switch 15 as an operation part exposed from an opening 14 (opening window) formed at the tip of the outer cylinder 1 is moved in the axial direction of the outer cylinder 1 to slide the core tank 5 in the axial direction. The slide of the lead tank 5 is arranged on the rear side of the connecting portion 16 and is guided by a guide member 18 fixed inside the outer cylinder 1.

The lead tank moving member 20 for moving the lead tank 5 includes a connecting portion 16 connected to and connected to the lead tank 5, and an operation switch 15 disposed at a position where the thumb tank or index finger can be operated with a mechanical pencil. The intermediate plate 17 serving as a guided portion interposed between the connecting portion 16 and the operation switch 15 is integrally combined.

  The connecting portion 16 is formed in a substantially cylindrical shape and is coupled to the core tank 5. Various methods, such as adhesion, integral molding, and mechanical coupling using unevenness, are used for coupling between the connecting portion 16 and the core tank 5. On the side surface of the connecting portion 16, recesses 16a that engage with a pair of hook pieces 17a provided at both ends in the width direction of the intermediate plate 17 are formed (see FIG. 6). A lower side hole 16b of the operation switch mounting hole is formed in the upper part of the connecting portion 16.

  In this embodiment, the connecting portion 16 is coupled to the lead tank 5, but if the lead tank 5 can be moved forward as the connecting portion 16 moves forward, the connecting portion 16 is It may not be fixed to the lead tank. For example, a hook may be provided on the outer periphery of the core tank 5 so that the hook and the connecting portion 16 abut.

  FIG. 4 shows a perspective view of the intermediate plate 17. The intermediate plate 17 is formed by projecting a pair of hook pieces 17a at both ends in the width direction of a main body plate 17b having an arc-shaped cross section that matches the outer shape of the connecting portion. An upper-side hole 17c of the operation switch mounting hole is formed at the center of the main body plate 17b. By attaching the intermediate plate 17 to the connecting portion 16, an operation switch mounting hole 21 having a step that widens the hole diameter toward the bottom is formed (see FIG. 6). Further, when the intermediate plate 17 is attached to the connecting portion, the rear side of the intermediate plate 17 protrudes rearward in the axial direction of the core tank 5 from the connecting portion 16 (see FIG. 2). The protruding portion of the intermediate plate 17 fits into a guide groove 18a formed in a guide member 18 described later. The connecting portion 16 and the intermediate plate 17 may be integrally formed by resin molding or the like.

  FIG. 5 shows a perspective view of the operation switch. The operation switch 15 exposed from the opening 14 on the side surface of the outer cylinder 1 includes an operation switch body 15a formed in a mountain shape so as to be easily operated with a finger, and a pair of hook pieces 15b protruding from the lower surface side of the operation switch body 15a. Have As shown in FIG. 6, the hook piece 15 b is engaged with the step of the operation switch mounting hole 21 to fix the operation switch 15 to the connecting portion 16 and the intermediate plate 17.

  By the way, when the operation switch 15 is at hand as in this embodiment, it is difficult to hold the mechanical pencil. For this reason, the operation switch may be structured so as to be retracted during writing and protruded when the lead is extended. The operation switch having this structure will be described later.

  As shown in FIG. 1, a guide member 18 having a through hole 18 b through which the core tank 5 passes is attached inside the outer cylinder 1. The guide member 18 guides the lead tank 5 to slide in the axial direction through the through hole 18b.

  As shown in FIG. 3, the guide member 18 includes a substantially cylindrical main body portion 18c in which a through hole 18b is formed, and a flexible member having a substantially arc-shaped cross section that protrudes in an axial direction from the end surface of the cylindrical main body portion 18c. 18d. In order to guide the intermediate plate 17, a guide groove 18a in which the intermediate plate 17 is fitted is formed in the main body portion, and a notch 18e in which the intermediate plate 17 is fitted is formed in the flexible portion 18d.

In addition, an engaging convex portion 19 formed in a triangular shape sharpened toward the tip of the outer tube 1 is provided on the flexible portion 18 d of the guide member 18 so that the guide member 18 can be attached to the outer tube 1. An engagement recess is formed in the outer cylinder so as to fit into the engagement protrusion 19. Since the flexible portion 18d is formed in a circular arc shape by the notch 18e, the flexible portion 18d is easily bent inward as compared to a cylindrical shape without the notch 18e. For this reason, the operation | work which inserts the guide member 18 in the outer cylinder 1 becomes easy. Moreover, since the engagement convex part 19 is formed in the triangle sharpened toward the front-end | tip, the engagement convex part 19 once fitted in the engagement recessed part of the outer cylinder 1 does not return back.

  As shown in FIG. 1, the connecting portion 16 connected to the core tank 5 is urged rearward by a spring 9 and is in close contact with the end face on the front end side of the guide member 18. That is, the guide member 18 also functions as a stopper for the connecting portion 16. The connecting portion 16 is arranged at a position different from the guide member 18 in the axial direction of the core tank 5 and closer to the front tool 2 than the guide member 18.

  When the lead tank 5 is slid forward in the axial direction, the operation switch 15 is moved forward while pressing the operation switch 15. At this time, the force of pressing the operation switch 15 is transmitted to the lead tank 5 through the connecting portion 16 and is distributed from the lead tank 5 to the front chuck 6 portion and the rear guide member 18. In the portion of the chuck 6, the metal chuck 6 passes through the metal spring seat 8 and the fastening ring 10. This slippery part is the front support. The back is also supported by the guide member 18. For this reason, the resistance at the time of sliding the core tank 5 in the axial direction can be reduced, and the core tank 5 can be moved in the axial direction with a light force. Even if the operation switch 15 is pressed with a strong force, the lead tank 5 bends so that the pressed force can be released, and the pressed force is not transmitted to the guide member 18 as it is. Further, since the intermediate plate 17 is fitted in the guide groove 18a and the notch 18e of the guide member 18, the operation switch 15 is not shaken or dented when the operation switch 15 is slid.

  A method for assembling the slide mechanism 13 will be described. First, the guide member 18 is put into the outer cylinder 1 from the rear end of the outer cylinder 1 with the flexible part 18d facing forward, and the engaging convex part 19 of the flexible part 18d fits into the engaging concave part of the outer cylinder 1. Move forward. Next, the intermediate plate 17 is attached to the connecting portion 16 of the core tank 5, and the core tank 5 is inserted into the outer cylinder 1 while passing through the through hole 18 b of the guide member 18 from the tip of the outer cylinder 1. Then, the operation switch mounting hole 21 formed in the intermediate plate 17 and the connecting portion 16 is exposed from the opening 14 of the outer cylinder 1, and the operation switch 15 is mounted in the operation switch mounting hole 21. The slide mechanism 13 can be assembled by the above process.

  The structure of the other part of the mechanical pencil 3 will be briefly described. As shown in FIG. 1, a lead holder 24 that guides the lead 4 is attached to the tip of the tip 2, and an eraser cradle 26 that holds an eraser 25 is attached to the rear end of the lead tank 5. The A cap 27 that covers the eraser 25 is attached to the eraser cradle 26. The eraser cradle 26 is formed with a lead supply port 28 communicating with the lead tank 5. The lead supply port 28 is closed by an eraser 25. The eraser 25 is removed when the lead is supplied, and the lead is supplied from the lead supply port 28 into the lead tank 5. A clip 29 is provided on the side surface near the rear end of the outer cylinder 1.

  In addition, the structure of the other part of the mechanical pencil described here is not particularly limited, and can be variously changed. For example, when the lead tank 5 and the eraser cradle 26 are cut off and the lead tank 5 is slid by the operation switch 15, the eraser cradle 26 may not be slid together with the lead tank 5. In this case, the eraser cradle 26 is urged rearward of the outer cylinder 1 by a spring. Further, a structure in which the weight body acts on the lead tank 5 when the mechanical pencil 3 is shaken may be added so that the lead tank 5 can be slid by both the weight body and the operation switch 15.

FIG. 7 shows another example of the guide member 18. When the operation switch 15 is thick, it is necessary to make the connecting portion 16 small. If the connecting portion 16 is made smaller, the connecting portion 16 cannot contact the tip of the flexible portion 18d of the guide member 18. For this reason, in this example, the cylindrical part 18g which can contact the connection part 16 is provided inside the flexible part 18d. The cylindrical portion 18g may be formed integrally with the main body portion 18c or may be formed separately.

  FIG. 8 shows still another example of the guide member 18. In this example, the main body portion 18c of the guide member 18 is disposed on the front end side of the mechanical pencil, and the flexible portion 18d is disposed on the rear end side. Thus, even if the connection part 16 is small, the connection part 16 can be made to contact the main-body part 18c of the guide member 18 even if the connection part 16 is small.

  When the operation switch is thick, considering that the intermediate plate 17 gets into the guide groove 18a of the guide member 18, it is necessary to make the main body 18c smaller or further cut the main body 18c. FIG. 9 shows an example in which the main body of the guide member 18 is made smaller. In order to maintain the thinness of the flexible portion 18d and ensure elasticity, a step is formed at the base of the flexible portion 18d. FIG. 10 shows an example in which the main body 18c is further cut. In this example, a cut is also made on the lower surface side of the flexible portion 18d to ensure the elasticity of the flexible portion 18d.

  FIG. 11 shows still another example of the guide member 18. In this example, instead of providing the flexible portion 18d, a claw piece 18h is provided on the side surface of the main body portion 18c. The base of the claw piece 18h is fixed to the main body 18c, and the tip is bent radially outward.

  FIG. 12 shows a state in which the guide member 18 shown in FIG. 11 is inserted into the outer cylinder 1. The outer cylinder 1 is formed with a recess 1a corresponding to the claw piece 18h. While the guide member 18 is inserted into the outer cylinder 1a, the claw piece 18h is elastically deformed inward and is in close contact with the main body portion 18c. When the guide member abuts on two to three stoppers provided on the outer cylinder 1 and the guide member 18 stops, the claw piece 18h is restored so that its tip end extends outward in the recess 1a. 1 is engaged with the recess 1a.

  FIG. 13 shows an example in which the connecting portion and the intermediate plate are integrated. When using the operation switch 61 as shown in FIG. 14 (the structure of the operation switch 61 will be described later), it is necessary to flatten the mounting base 121 of the operation switch. The integral connecting portion is preferably used for mounting such an operation switch. In addition, an engagement hole 122 that engages with the hook 61a of the operation switch is formed in the integral connecting portion. The protruding portion 123 protruding from the integral connecting portion fits into the guide groove 18 a of the guide member 18.

  FIG. 15 shows an embodiment of the ballpoint pen of the present invention. A tip 32 is attached to the tip of the outer cylinder 31. A ballpoint pen fill 33 is accommodated in the outer cylinder 31. The ball-point pen refill 33 is urged rearward by a spring 35 interposed between a cylindrical spring receiver 34 fixed to the ball-point pen refill 33 and a tip 32. By sliding the ball-point pen refill 33 with respect to the outer cylinder 31 in the axial direction of the ball-point pen refill 33, the tip of the ball-point pen refill 33 is taken out from the tip 32 attached to the end of the outer cylinder 31.

  A slide mechanism 36 similar to the slide mechanism 13 of the first embodiment is provided at the distal end portion of the outer cylinder 31, and a conventionally known rotary cam mechanism is provided behind the slide mechanism 36. First, a known rotary cam mechanism will be outlined.

The rotating cam mechanism is a known mechanism including a cam body 37, a rotating cam (not shown), and a cam bar (not shown). The cam body 37 is fixed in the outer cylinder 1, and deep cam grooves and shallow grooves are alternately formed on the front end side thereof via mountains. That is, the front end of the cam body 37 is a saw-shaped cam surface. The rotating cam alternately engages the cam body 37 with the cam surface and inserts it into the cam groove. A receiving surface for receiving the ballpoint pen refill 33 is formed on the rotating cam. A cam bar is arranged behind the rotating cam, and a plurality of protrusions formed on the outer surface of the cam bar are inserted into the deep cam groove and the shallow groove of the cam body 37, respectively, so that the rotating cam can be pushed forward. Become.

  When the ballpoint pen refill 33 moves forward, the rotating cam urged rearward by the ballpoint pen refill 33 is pushed forward by the cam bar, and the rotating cam meshing with the cam bar rotates by a predetermined angle to engage the cam surface of the cam main body 37. The ballpoint pen refill 33 is maintained in a protruding state. When the ballpoint pen refill 33 is advanced again, the cam bar advances and pushes the rotating cam forward, the rotating cam rotates by a predetermined angle, the rotating cam is inserted into the cam groove of the cam body 37, and the rotating cam, cam bar and ballpoint pen. The refill 33 moves rearward by the elastic force of the spring 35, and the ballpoint pen refill 33 is retracted.

  Next, the slide mechanism 36 for sliding the ballpoint pen feeler 33 in the axial direction will be described. In the slide mechanism 36 of this embodiment as well, as with the slide mechanism 13 of the above embodiment, the operation switch 15 exposed from the opening formed at the distal end portion of the outer cylinder 31 is moved in the axial direction of the outer cylinder 1, The ballpoint pen feeler 33 is slid in the axial direction. The operation switch 15 is fixed to the connecting portion 16 connected to the ballpoint pen refill 33. The sliding motion of the ballpoint pen refill 33 is arranged on the rear side of the connecting portion 16 and is guided by the guide member 18 fixed inside the outer cylinder 31. Since the configuration of the operation switch 15, the intermediate plate 17, the connecting portion 16, and the guide member 18 is the same as that of the above embodiment, the same reference numerals are given and the description thereof is omitted.

  Also in this embodiment, when the ball-point pen refill 33 is slid forward in the axial direction, it is moved forward while pressing the operation switch 15. At this time, the force of pressing the operation switch 15 is transmitted to the ballpoint pen refill 33 through the connecting portion 16, and is distributed from the ballpoint pen refill 33 to the front tip 2 portion and the rear guide member 18. For this reason, the resistance at the time of sliding the ball-point pen refill 33 in the axial direction can be reduced, and the ball-point pen refill 33 can be moved in the axial direction with a light force.

  Although not shown, a rear end cap is screwed to the rear end of the outer cylinder 31 and a clip is provided.

  FIG. 16 shows an embodiment of the writing instrument of the present invention. In the writing instrument of this embodiment, a pair of mechanical pencils 41 is combined so that one core and the other core with different core thicknesses can be used. The pair of mechanical pencils 41 are coupled by a coupling tool 42 so that the tip 43 of the pair of mechanical pencils 41 is disposed at both ends of the writing instrument. In addition to combining a pair of mechanical pencils, a mechanical pencil and a ballpoint pen may be combined, or a pair of ballpoint pens may be combined.

  A ring-shaped protrusion 45 is formed around the rear end of the outer cylinder 44 of each mechanical pencil 41, and a concave groove that fits into the protrusion 45 is formed in the connector 42. The connecting tool 42 is fitted into the rear end of the outer cylinder 44, and the concave groove of the connecting tool 42 is engaged with the protrusion 45 of the outer cylinder 44.

  Each mechanical pencil 41 has a lead feeding mechanism 12 and a lead tank slide mechanism 13 as in the case of the mechanical pencil 3 of the first embodiment. Then, the lead tank 5 is slid in the axial direction, and the lead is fed out from the tip 43 attached to the tip of the outer cylinder 1. Each mechanical pencil 41 includes an operation switch 15, an intermediate plate 17, a connecting portion 16, and a guide member 18 in the same manner as the mechanical pencil 3 of the first embodiment. Since these configurations are the same as those of the mechanical pencil 3, the same reference numerals are given and the description thereof is omitted.

In this embodiment, the tip portions of the core tank 5 of the pair of mechanical pencils 41 (specifically, the portions guided by the guide member 18) are arranged so that their axis lines substantially coincide. Further, the core tanks 5 of the pair of mechanical pencils 41 are overlapped with each other in the axial direction so that the length of the writing instrument in the axial direction can be shortened. Here, since the axes of the tip portions of the pair of core tanks 5 are made coincident with each other and the rear sides of the core tanks 5 are overlapped, the core tanks 5 bend so as to avoid each other. Then, the outer cylinder 44 in the vicinity of the rear end of the lead tank 5 is inflated so that the deflection amount of the lead tank 5 can be secured.

  A bulge is also formed at the front end of the outer cylinder 44 in order to make it easier to hold the writing instrument. A ring-shaped protrusion 48 is formed around the tip of the bulge so that the cap 46 can be attached and detached. A concave groove 49 that fits into the protrusion 48 is formed on the inner periphery of the cap 46 so that the cap 46 can be attached to and detached from the front end of the outer cylinder 44.

  The cap 46 also fits to the rear end portion of the outer cylinder 44, and can be attached to and detached from the rear end of the separated mechanical pencil 41 when separated into a single mechanical pencil 41. . Further, the cap 46 is provided with an eraser accommodating portion 46 a for accommodating a cylindrical eraser 50. The eraser accommodating portion 46 a is cut obliquely with respect to the axis of the cap 46. Thereby, not only the tip side of the eraser 50 but also the root can be used.

  A cap 51 is attached to the rear end of the lead tank 5 so that the lead does not jump out of the lead tank 5. When inserting the lead into the lead tank 5, the cap 51 is removed.

  FIG. 17 shows the opening of the operation switch 15. In the figure, (A) shows a front view, and (B) in the figure shows a cross-sectional view. The opening window of the operation switch 15 is formed in a recessed portion between the bulge 44a on the rear end side of the outer cylinder 44 and the bulge 44b on the front end side. In order to make it easy to press the operation switch, a recess 44b is formed on the rear side of the opening 53 as shown in FIG. Further, a fold 44c is provided at the portion where the bulge 44b on the tip side is cut to improve the appearance.

  According to this embodiment, the overall length of the writing instrument can be shortened. In addition, since a part of the outer cylinder 44 swells, a writing instrument that is easy to hold can be obtained. Moreover, when the above-mentioned slide mechanism 13 is used, the length from the guide member 18 to the tip of the tip tool 43 (the part where the center lines of the core tanks 5 on both sides are matched) can be shortened. Can be easily stacked in the axial direction.

  FIG. 18 shows another example of a method of connecting the outer cylinder 44 and the connecting tool 42 or the cap 46. In the figure, (A) shows a cross-sectional view of the distal end portion of the coupler 42 to which the union nut 52 is attached, and (B) in the figure shows a perspective view of the distal end portion of the coupler 42 to which the union nut 52 is attached. (C) shows the perspective view of the front-end | tip part of the coupling tool 42 which removed the union nut 52, and the front-end | tip part of the outer cylinder 44. FIG. A union nut 52 having a screw formed on the inner periphery is rotatably attached to the connector 42. Concavities and convexities are formed at the distal end of the coupling tool 42, and irregularities that mesh with the irregularities at the distal end of the coupling tool are formed at the distal end of the outer cylinder 44. After engaging the unevenness at the tip of the outer cylinder 44 with the unevenness at the tip of the connector 42, the union nut 52 is rotated, and the union nut 52 and the outer cylinder 44 are screwed together. If this union nut 52 is used, it can join, without rotating both the coupling tool 42 and the outer cylinder 44. FIG.

  FIG. 19 shows an embodiment of the operation switch 61 whose shape can be changed according to the present invention. The outer cylinder 1 as a case is provided with an elongated opening 14 along the axial direction. The shape of the operation switch 61 changes between the state stored in the opening 14 and the state protruding from the opening 14. (A) in the figure shows a protruding state in which the operation switch 61 protrudes from the opening 14, and (B) in the figure shows a stored state in which the operation switch 61 is stored in the opening 14.

  As shown in FIG. 5A, when the operation switch 61 is slid in the axial direction with respect to the outer cylinder with the thumb or index finger, the hook of the operation switch 61 described later moves to the position of the notch 62, The engagement with the edge of the opening 14 is released, and the operation switch 61 changes from the retracted state to the protruding state. In order to make it easy to press the operation switch 61, a recess 63 is formed on the rear side of the opening 14 of the outer cylinder 1.

  On the other hand, as shown in (B) in the figure, when the operation switch 61 in the protruding state is pushed with the thumb or index finger, the operation switch 61 sinks, and the hook and the edge of the opening 14 are engaged to operate the operation switch 61. The shape changes from the protruding state to the retracted state.

  The structure other than the lead feeding mechanism 12 that feeds the lead and the operation switch 61 of the slide mechanism 13 that slides the lead tank 5 in the axial direction is substantially the same as the embodiment of the mechanical pencil 3 described above. When the operation switch 61 is slid forward of the outer cylinder 1, it is slid against the spring force of the spring 9 of the core feeding mechanism 12 (see FIG. 1). After the operation switch 61 is protruded, when the hand is released from the operation switch 61, the operation switch 61 is urged rearward of the outer cylinder 1 by a spring force. When the operation switch 61 is pressed at this time, the hook of the operation switch 61 is engaged with the edge of the opening 14.

  FIG. 20 shows a side shape of the operation switch 61. The operation switch 61 is formed by bending a plate-like member, and includes a base 65, a first side surface portion 66 bent with respect to the base 65, and a second surface bent with respect to the first side surface portion 66. The side part 67 and the slide part 68 bent with respect to the 2nd side part 67 are provided. The first side surface portion 66 is rotatable with respect to the base 65 around the one side 66a on the base 65 side. The second side surface portion 67 is rotatable with respect to the first side surface portion 66 about the other side 66b facing the one side 66a of the base side of the first side surface portion 66 as an axis. The slide portion 68 is slidable with respect to the base 65, and thus the second side surface portion 67 is configured such that one side 67 a on the base 65 side can slide with respect to the base 65. In this embodiment, rubber 77 is pasted on each of the surface of the first side surface portion 66 and the surface of the second side surface portion 67 in order to make the operation switch 61 easy to operate.

  When the engagement between the hook of the operation switch 61 and the edge of the opening 14 is released, the base 65, the first side surface 66, and the second side surface 67 are formed as shown in FIG. The three-dimensional side shape to be formed becomes a triangular shape. This shape is the original shape of the operation switch 61. The operation switch 61 stores this shape. As shown in FIG. 5B, when the operation switch 61 is pushed from above, the triangular shape is gradually crushed, and the hook and the edge of the opening 14 are engaged, the first side surface 66 and the second side The side surface portion 67 is arranged on substantially one plane.

  FIG. 21 shows the operation switch 61 and the intermediate plate 17, and FIG. 22 shows a rear perspective view of the operation switch. A pair of hook pieces 69 are provided on the lower surface of the base 65 of the triangular operation switch 61. The pair of hook pieces 69 are engaged with the operation switch mounting hole 21 to fix the operation switch 61 to the connecting portion 16 and the intermediate plate 17. As described above, the shape of the operation switch 61 changes from a flat shape to a triangular shape. The operation switch base 65 is formed flat. On the other hand, the intermediate plate 17 is formed in a curved shape. In order to attach the flat base 65 to the curved intermediate plate 17, as shown in FIG. 22, legs 70 curved to match the intermediate plate 17 are provided on both sides of the hook piece 69 on the lower surface of the base 65. ing.

FIG. 23 shows the operation switch 61 in a protruding state. In order to make it easier to push the protruding operation switch forward, the second side surface portion 67 is curved so as to protrude toward the inside of the triangle. Further, hooks 71 that engage with the edge of the opening 14 are provided at both ends of the first side surface portion 66 in the width direction.
Is provided.

  FIG. 24 shows a state in which the hook 71 of the operation switch 61 and the edge of the opening 14 are engaged. When the operation switch 61 shown in (B) in the figure is pushed from above, the hook 71 of the operation switch 61 is engaged with the edge of the opening 14 as shown in (A) in the figure. As a result, the operation switch 61 is stored.

  FIG. 25 shows a state in which the engagement between the hook 71 of the operation switch 61 and the edge of the opening 14 is released. As shown in FIG. 2B, a pair of notches 79 are formed at the edge of the opening 14 of the outer cylinder 1. When the stored operation switch 61 is slid forward of the outer cylinder 1 and the hook 71 is moved to the notch 79, the hook 71 and the edge of the opening 14 are engaged with each other as shown in FIG. Canceled. Then, the operation switch 61 is restored to the original triangular shape.

  FIG. 26 shows a detailed perspective view of the operation switch 61. Both ends in the width direction of the base 65 are bent so as to form guide grooves 65a. The slide portion 68 slides with respect to the base 65 while being guided by the guide groove 65a. The connecting portion between the second side surface portion 67 and the slide portion 68 is constricted at both end portions 74 in the width direction so that the slide portion 68 can be inserted into the guide groove 65a of the base 65, and the lateral width of the slide portion 68 is The width of the second side surface portion 67 is narrower.

  FIG. 27 shows the operation switch 61. In the figure, (A) shows a side shape, and (B) in the figure shows a cross-sectional shape. Hooks 71 are formed at both ends in the width direction of the first side surface portion 66. A slide portion 68 is accommodated in the base 65.

  FIG. 28 also shows the operation switch 61. (A) in the figure shows a state in which the hook 71 of the operation switch 61 and the edge of the opening 14 are engaged, and (B) in the figure shows that the hook 71 is disengaged from the edge of the opening 14 and the operation switch 61 is FIG. 2C shows a plan view of the base 65 of the operation switch 61. FIG. As shown in FIG. 5A, when the operation switch 61 is folded, the hook 71 provided on the first side surface portion 66 interferes with both end portions of the base 65. Part 75 of both ends of the base 65 is shaved so that the hook 71 and the base 65 do not interfere with each other.

  29 to 34 show the relationship between the intermediate plate 17 and the operation switch 61. 29 is a perspective view of the intermediate plate 17 and the operation switch 61, FIG. 30A is a side view of the operation switch 61 attached to the intermediate plate 17, and FIG. 30B is attached to the intermediate plate 17. Sectional drawing of the operated switch 61 is shown. FIGS. 31 and 32 show the intermediate plate 17 and the operation switch 61 incorporated in the outer cylinder 1. 32A shows a cross-sectional view, and FIG. 32B shows a plan view. FIG. 33 is a sectional view of the guide member 18 and the intermediate plate 17 incorporated in the outer cylinder 1, and FIG. 34 is a perspective view of the guide member 18.

  As shown in the sectional view of FIG. 30, the lateral width of the operation switch 61 is smaller than the lateral width of the intermediate plate 17. Further, as shown in FIGS. 31 and 32, a recess 63 is formed at the rear end of the opening 14. This dent 63 is necessary to move the operation switch 61 first. A finger falls into the dent 63 so that the second side surface portion can be easily pushed. In order to reduce the gap between the outer cylinder 1 and the intermediate plate 17, the thickness of the intermediate plate 17 in the portion where the recess 63 is formed is reduced, and the portion where the recess 63 on the front side of the opening 14 is not formed. The thickness of the intermediate plate is increased. In addition, a gap W is provided between the first side surface portion 66 and the front end of the opening 14 by the amount that the operation switch 61 slides.

As shown in FIGS. 33 and 34, a guide groove 18a is formed in the guide member 18, and the intermediate plate 17 is fitted in the guide groove 18a. It is desirable to use a soft plastic or celluloid for the intermediate plate 17 so that friction does not occur between the bottom surface of the guide groove 18a and the intermediate plate 17. However, the strength of the operation switch mounting hole 21 into which the operation switch 61 is fitted needs to be increased.

  FIG. 35 shows another embodiment of the operation switch. In the figure, (A) shows a perspective view of the operation switch 61, (B) shows a front side perspective view of the elastic cap 72 that covers the operation switch 61, and (C) in the figure shows the back side of the elastic cap 72. A perspective view is shown. Since the structure of the operation switch 61 is substantially the same as that of the operation switch of the above embodiment, the same reference numerals are given and the description thereof is omitted. In this embodiment, the operation switch 61 is covered with a rubber elastic cap 72, and the operation switch 61 is made triangular by the restoring force of the elastic cap 72. The operation switch 61 itself does not necessarily have to return to a triangular shape by its own restoring force.

  As shown in FIGS. 5B and 5C, the elastic cap 72 is in close contact with the first cover portion 73 that is in close contact with the outer side of the first side surface portion 66 and the outer side of the second side surface portion 67. A second cover portion 74; a first connecting portion 75 that connects one end side 73a in the width direction of the first cover portion 73 and one end side 74a in the width direction of the second cover portion 74; A second connecting portion 76 that connects the side of the other end 73 b in the width direction of the first covering portion 73 and the side 74 b of the other end in the width direction of the second covering portion 74. The elastic cap 72 is elastically deformed when the hook 71 of the operation switch 61 and the edge of the opening 14 are engaged, and the first side surface portion 66 and the second side surface portion 67 are arranged on a substantially flat surface. Is allowed. On the other hand, when the engagement between the hook 71 and the edge of the opening 14 is released, the three-dimensional side surface formed by the base 65, the first side surface 66, and the second side surface 67 is triangular. To.

  36 to 38 show still another embodiment of the operation switch. 36A shows a perspective view of the operation switch 81, FIG. 36B shows a front side perspective view of the elastic cap 91, and FIG. 36C shows a rear side perspective view of the elastic cap 91. . In the operation switch 81 of this embodiment, the first and second side surface parts 83 are provided on one side 83a, 84a and the other side 83b, 84b in the width direction of the first and second side parts 83, 84, respectively. , 84 is formed such that the width thereof is narrowed from one side 83c, 84c on the base 82 side toward the other side 83d, 84d facing the one side 83c, 84c on the base 82 side. That is, the upper side a-1 and b-1 are slightly thinner than the lower side a-2 and b-2 than the middle of the first and second side surface portions 83, 84. Accordingly, the first and second connecting portions 92 of the elastic cap 91 also have one end sides 83a and 84a and the other end side 83b in the width direction of the first and second side surface portions 83 and 84 of the operation switch. , 84b corresponding to the step 86 is formed.

  FIG. 37 shows the side shape of the operation switch 81 covered with the elastic cap 91. The side surface of the operation switch 81 covered with the elastic cap 91 is formed in a triangular shape, and a connecting portion step 93 is formed in the center in the height direction.

  FIG. 38 shows a change in the shape of the operation switch 81 covered with the elastic cap 91. When the operation switch 91 shown in FIG. 5A is pressed from above, the upper triangle 94 becomes an obtuse triangle as shown in FIG. It is buried in the trapezoid 95. As shown in FIG. 5C, when the operation switch 81 is further crushed, the fold of the connecting portion step 93 becomes deeper and the upper triangular portion 94 becomes flat. Then, the upper triangle 94 that is flat when viewed from the side is completely buried in the turn of the connecting portion step 93. Providing the connecting portion step 93 in this way prevents the elastic cap 91 from bumping when the operation switch 81 is crushed.

39 to 41 show still another embodiment of the operation switch. FIG. 39 shows the operation switch 101 with the elastic cap 91 removed. In this embodiment, in order to smoothly slide the operation switch 101 even when the elastic cap 91 is covered (in order to prevent the elastic cap having a large friction coefficient from contacting the edge of the opening 14 and increasing the frictional resistance). An edge 105 is provided outside the base 102. However, the edge 105 is provided with a notch 105 a so that the hook 106 provided on the first side surface portion 103 does not interfere with the edge 105 when the operation switch 101 is folded. Further, when the operation switch 101 is slid, a cut 105b is made in the edge 105 so that the second side surface portion can be easily touched with a finger.

  FIG. 40 shows a detailed view of the hook 106 of the operation switch 101. Since the operation switch 101 is covered with an elastic cap 91, the hook 106 is projected outward as shown in FIG. As shown in FIG. 5B, when the elastic cap 91 is covered, the hook 106 is formed with a first protruding surface 107 that protrudes to the outside of the elastic cap 91, and the outer side of the first protruding surface 107. A hook tip 108 is formed on the top. The first projecting surface 107 protrudes to substantially the same position as the outside of the edge 105 formed on the base 102.

  FIG. 41 shows the positional relationship between the operation switch 101 and the opening 14 of the outer cylinder 1. In the figure, (A) shows a plan view, and (B) in the figure shows a cross-sectional view. When the operation switch 101 is pushed from above, the hook tip 108 is caught on the edge of the opening 14. When the operation switch 101 is slid forward, the hook is released from the notch 79 at the edge of the opening 14, and the operation switch 101 protrudes.

  FIG. 42 shows a state in which the operation switch 101 protrudes ((A) in the figure) and a stored state ((B) in the figure). In the figure, a perspective view is shown in the upper part of (A), a front view is shown in the middle part, and a side view is shown in the lower part.

  FIG. 43 shows an operation switch 111 having three steps on the first and second side surfaces. (A) in the figure shows a state in which the operation switch 111 protrudes, and (B) in the figure shows a state in which the operation switch 111 is stored. In the figure, the part (2) is folded inside the part (1), and the part (3) is folded inside the part (2). As shown in this example, the elastic cap of the operation switch 111 may have three steps.

  44 to 46 show still another embodiment of the operation switch 115. 44 shows a perspective view of the first and second side surfaces 117 and 118 of the operation switch 115, FIG. 45 shows a bottom view of the base 116 of the operation switch 115, and FIG. 46 shows a side view of the operation switch 115. . In this embodiment, the operation switch 115 is not provided with a plate-like slide portion. Instead, the fitting member 119 fitted into the second side surface portion 118 causes the second side surface portion 118 to move relative to the base 116. Slide.

  As shown in FIGS. 44 (A) and 44 (B), a bulging portion 118a that is bulged round is formed at the tip of the second side surface portion 118 of the operation switch 115. The fitting member 119 shown by C) is fitted. A round bar 120 is formed on the fitting member 119.

  As shown in FIG. 45, the base 116 is formed with a slit 116a. Since the leg part 121a provided on the bottom surface of the base 116 is divided by the slit 116a, two leg parts 121a are provided on both sides of the slit 116a and are long along the slit 116a.

After the fitting member 119 is passed through the slit 116 a, the fitting member 119 is fitted into the tip of the second side surface portion 118. Specifically, the round bar 120 is made parallel to the slit 116a formed in the base 116, and after passing through the slit 116a, is made perpendicular to the slit 116a. In this state, the fitting member 119 is fitted into the bulging portion 118 a of the second side surface portion 118. As shown in FIG. 46 in which the whole is assembled, it is understood that the second side surface portion 118 can be slid with respect to the base 116 by using the fitting member 119 without providing a plate-like slide portion.

  FIG. 47 shows still another embodiment of the operation switch. The operation switch 131 is devised for thinning the stored state. A protrusion 133 a that engages with the edge of the opening 14 of the outer cylinder 1 is provided at the distal end of the second side surface 133 of the operation switch 131 on the base 132 side. This protrusion 133 a slides with respect to the outer cylinder 1. FIG. 48 shows the operation switch 131 in the protruded state and the retracted state. The operation switch 131 is covered with an elastic cap 135 as necessary.

  FIG. 49 shows a detailed view of the operation switch 131. As shown in FIG. 4A, the base 132 may be partially cut, and the second side surface 133 may be in contact with the tip of the cut portion. Further, as shown in FIG. 5B, a groove 132a may be formed in the base 132, and the lower end protrusion 133b of the second side surface portion 133 may be fitted into the groove 132a. In this case, the bottom 132b of the groove 132a serves as a stopper. Further, as shown in (C) in the figure, a fence 135 is provided on both sides of the base 133a, a groove 136 is formed in the fence 135, and the protrusion 133a of the second side surface 133 slides in the groove 136. It may be.

  FIG. 50 shows still another embodiment of the operation switch. The operation switch 141 is also devised to make the stored state thinner. In this embodiment, a groove 145 is formed from the first side surface portion 143 to the second side surface portion 144. In the groove 145, an elongated rubber 146 is stretched as an elastic member. One end of the rubber 146 is coupled to the first side surface portion 143, and the other end is coupled to the second side surface portion 144. Since the rubber 146 is accommodated in the groove 145 when folded, the thickness of the operation switch 141 does not increase. In order to hide the rubber 146 and improve the appearance, the operation switch 141 may be covered with a decorative member 147.

  FIG. 51 shows another example of the hook of the operation switch. In order to lightly engage the hook 17 with the edge of the opening 14 of the outer cylinder 1, a cut may be made around the hook 17 to make the hook 17 bend easily.

  In the above embodiment, the example in which the operation switch is applied to the mechanical pencil has been described. However, the present invention is not limited to the operation switch of the mechanical pencil, but is stored in the operation switch of the ballpoint pen or the opening opened in the case. It can be applied to various operation switches whose shape can be changed between the stored state and the protruding state protruding from the opening.

Sectional drawing which shows the mechanical pencil in embodiment of this invention. The perspective view of the slide mechanism integrated in the inside of an outer cylinder. The exploded perspective view of a slide mechanism. The perspective view of an intermediate | middle plate. The perspective view of an operation switch. The figure which shows the assembly method of a slide mechanism. The figure which shows the other example of a guide member. The figure which shows the further another example of a guide member. The figure which shows the further another example of a guide member. The figure which shows the further another example of a guide member. The figure which shows the further another example of a guide member. The figure which shows the guide member (guide member of the example shown by FIG. 11) incorporated in the outer cylinder. The figure which shows the example which united the connection part and the intermediate | middle plate. The figure which shows the state which attached the operation switch to the integrated connection part shown by FIG. Sectional drawing which shows the ball-point pen in embodiment of this invention. Sectional drawing which shows embodiment of the writing instrument of this invention. The figure which shows the opening part of an operation switch ((A) in a figure shows a front view, (B) in a figure shows sectional drawing). The figure which shows the other example of the connection method of an outer cylinder, a connection tool, or a cap ((A) in the figure shows sectional drawing of the front-end | tip part of the connection tool which attached the union nut, (B) is a union nut in the figure.) The perspective view of the front-end | tip part of the coupling tool which attached A is shown, (C) in the figure shows the perspective view of the front-end | tip part of the coupling tool which removed the union nut, and the front-end | tip part of an outer cylinder. The perspective view which shows embodiment of the operation switch which can change the shape of this invention ((A) in the figure shows the protrusion state which the operation switch protruded from the opening part, (B) in the figure stores the operation switch in the opening part) Stored state). The figure which shows the side shape of an operation switch ((A) in a figure shows the protrusion state which the operation switch protruded from the opening part, (B) in the figure shows the storing state in which the operation switch was stored in the opening part). The perspective view which shows an operation switch and an intermediate | middle plate. The back side perspective view of an operation switch. The figure which shows the operation switch of the state which protruded. The figure which shows the relationship between the hook of an operation switch, and an opening part ((A) in the figure shows sectional drawing of the state which the edge of the hook and opening part engaged, (B) in the figure shows the state which has pushed the operation switch) A perspective view is shown). The figure which shows the relationship between the hook of an operation switch, and an opening part ((A) in the figure shows the perspective view of the state with which engagement with the hook of the operation switch and the edge of the opening part was cancelled | released, (B) is an opening part) Is a plan view). The detailed perspective view of an operation switch. The figure which shows an operation switch ((A) in a figure shows a side surface shape, (B) in a figure shows a cross-sectional shape). The figure showing the operation switch ((A) in the figure shows a state where the hook of the operation switch is engaged with the edge of the opening, and (B) in the figure shows that the hook is detached from the edge of the opening, and the operation switch is The figure shows a state of starting to float, and (C) in the figure shows a plan view of the base of the operation switch). The perspective view of an intermediate | middle plate and an operation switch. The figure which shows an intermediate | middle plate and an operation switch (In the figure, (A) shows the side view of the operation switch attached to the intermediate plate, FIG.22 (B) shows sectional drawing of the operation switch attached to the intermediate plate.). The figure which shows the intermediate | middle plate and operation switch which were integrated in the outer cylinder. The intermediate plate and the operation switch incorporated in the outer cylinder are shown ((A) shows a sectional view and (B) shows a plan view). Sectional drawing of the guide member and intermediate | middle plate incorporated in the outer cylinder. The perspective view of a guide member. The figure which shows other embodiment of an operation switch ((A) in the figure shows the perspective view of an operation switch, (B) in the figure shows the surface side perspective view of the elastic cap covered on an operation switch, and (C) ) Shows a perspective view of the back side of the elastic cap) The figure which shows other embodiment of an operation switch ((A) in the figure shows the perspective view of an operation switch, (B) in the figure shows the surface side perspective view of an elastic cap, (C) in the figure shows an elastic cap) The back side perspective view is shown. The figure which shows the side surface shape of the operation switch with which the elastic cap was covered. The figure which shows the change of the shape of the operation switch with which the elastic cap was covered. The figure which shows other embodiment of an operation switch (the perspective view which shows the operation switch of the state which removed the elastic cap). Detailed view of the hook of the operation switch ((A) in the figure shows a state where the elastic cap is removed, and (B) in the figure shows a state where the elastic cap is attached). The figure which shows the positional relationship of an operation switch and the opening part of an outer cylinder ((A) in a figure shows a top view, and (B) in a figure shows sectional drawing). The figure which shows the state ((A) in the figure) and the state ((B) in the figure) which the operation switch protruded. The figure which shows the operation switch which provided the three steps | paragraphs of steps in the 1st and 2nd side part ((A) in the figure shows the state which the operation switch protruded, (B) in the figure shows the state which the operation switch stored. Show). The figure which shows other embodiment of an operation switch (The perspective view of the 1st and 2nd side part of an operation switch is shown). The bottom view of the base of an operation switch. The side view of an operation switch. The figure which shows other embodiment of an operation switch. The figure which shows other embodiment of an operation switch. The figure which shows other embodiment of an operation switch. The figure which shows other embodiment of an operation switch. The figure which shows other embodiment of an operation switch.

Explanation of symbols

1 ... Outer cylinder (case)
2 ... Tip 3 ... Mechanical pencil 5 ... Core tank 6 ... Chuck 14 ... Opening 15 ... Operation switch (operation unit)
15b ... hook piece 16 ... connecting part 17 ... intermediate plate (guided part)
18 ... guide member 18a ... guide groove (guide part)
18b ... through hole 18c ... main body portion 18d ... flexible portion 18e ... notch (guide portion)
19 ... engagement convex part 20 ... core tank moving member 21 ... operation switch mounting hole 31 ... outer cylinder 32 ... tip tool 33 ... ball pen refill 41 ... mechanical pencil 42 ... connecting tool 43 ... tip tool 44 ... outer cylinders 61, 81 , 101, 131, 141 ... operation switches 62, 79 ... notches 65 ... base 66 ... first side surface 66a ... one side 66b ... other side 67 ... second side 67a ... one side 71 on the base side 106 ... Hooks 72, 91 ... Elastic cap 73 ... First cover 73a ... One end side 73b in the width direction of the first cover portion ... Second end side 74 in the width direction of the first cover portion ... Second Of the second cover portion in the width direction of the second cover portion 74b ... the side of the second cover portion in the width direction of the second cover 75 ... the first connecting portion 76 ... the second connecting portion 82 ... first And second connecting portions 83, 84... First and second side surface portions 8 a, 84a: side 83b, 84b at one end in the width direction of the first and second side faces ... side 83c at the other end in the width direction of the first and second side faces ... one side 83d, 84d ... base side Other side 86 opposite to one side of the side ... Step 93 ... Connecting step 146 ... Rubber (elastic member)

Claims (12)

In the mechanical pencil that feeds the lead from the tip attached to the tip of the outer cylinder by sliding the lead tank attached to the tip of the chuck that can clamp the lead in the axial direction of the lead tank with respect to the outer cylinder,
A guide member that has a through-hole through which the core tank passes, and is attached to the inside of the outer cylinder;
A lead tank moving member that is exposed from the opening on the side surface of the outer cylinder and has an operation part that can be operated with a thumb or forefinger with a mechanical pencil, and a connecting part that is connected to the lead tank; Prepared,
The connecting portion of the lead tank moving member is arranged at a position different from the guide member in the axial direction of the lead tank and closer to the tip than the guide member,
A mechanical pencil, wherein the lead is drawn out from the tip by sliding the lead tank with respect to the outer cylinder using the operation unit.   The mechanical pencil according to claim 1, wherein the guide member is formed with a guide portion for guiding the lead tank moving member to slide with respect to the guide member. The guide member has a main body part in which the through hole is formed, and a flexible part having a substantially arc-shaped cross section protruding from the main body part,
An engagement convex portion is formed on one of the flexible portion of the guide member and the outer tube so that the guide member can be attached to the outer tube, and the flexible portion of the guide member and the The mechanical pencil according to claim 2, wherein an engagement recess that fits into the engagement protrusion is formed on the other of the outer cylinders. The lead tank moving member has a guided portion that protrudes in the axial direction of the lead tank from the connecting portion so as to fit into the guide portion,
By attaching the guided portion to the connecting portion, an operation switch mounting hole having a step that widens the hole diameter toward the bottom is formed,
The mechanical pencil according to claim 2 or 3, wherein a hook piece that engages with the step is formed in the operation portion. In the ballpoint pen that slides the ballpoint pen refill with respect to the outer cylinder in the axial direction of the ballpoint pen refill, and the tip of the ballpoint pen refill from the tip attached to the end of the outer cylinder,
A guide member that has a through hole through which the ballpoint pen refill passes, and is attached to the inside of the outer cylinder;
A ball pen refill moving member that is exposed from the opening on the side surface of the outer cylinder and has an operation portion that can be operated with a thumb or index finger while holding the ballpoint pen, and a connecting portion that is connected to the ball pen refill. ,
The connecting portion of the ball-point pen refill movement member is arranged at a position different from the guide member in the axial direction of the ball-point pen refill and on the tip side of the guide member,
A ball-point pen, wherein the tip of the ball-point pen refill is extended from the tip by sliding the ball-point pen refill with respect to the outer cylinder using the operation unit. A combination of a pair of mechanical pencils that has a lead tank attached to the tip of a chuck that can clamp the lead, and that feeds the lead from a tip attached to the tip of the outer cylinder,
Alternatively, a combination of a pair of ballpoint pens that project the tip of the ballpoint pen refill from the tip attached to the tip of the outer barrel by sliding the ballpoint pen refill relative to the outer barrel in the axial direction of the ballpoint pen refill,
Or it has a lead tank attached to the tip of a chuck that can clamp the lead, and a mechanical pencil that feeds the lead from the tip attached to the tip of the outer tube, and slides the ball pen refill against the outer tube in the axial direction of the ball pen refill By combining the ballpoint pen with which the tip of the ballpoint pen refill is fed out from the tip attached to the tip of the outer cylinder,
The pair of mechanical pencils, the pair of ballpoint pens, or the pair of mechanical pencils and the pens of the pair of mechanical pencils, In the writing instrument that connects the outer cylinder of the pair of ballpoint pens, or the outer cylinder of the mechanical pencil and the outer cylinder of the ballpoint pen with a connector,
The tip of the pair of mechanical pencil lead tanks, the tip of the ball pen refill of the pair of ballpoint pens, or the tip of the lead pencil lead tank and the tip of the ballpoint pen refill of the ballpoint pen, Arrange them so that they match,
The pair of mechanical pencil core tanks, the pair of ballpoint pen ballpoint refills, or the mechanical pencil core tank and the ballpoint pen in the axial direction so that the axial length of the writing instrument can be shortened. Overlap each other,
A writing instrument characterized by inflating the outer cylinder in the vicinity of the rear end of the lead tank of the mechanical pencil or in the vicinity of the rear end of the ballpoint pen refill. The mechanical pencil is
A guide member that has a through-hole through which the core tank passes, and is attached to the inside of the outer cylinder;
A lead tank moving member that is exposed from the opening of the outer cylinder and has an operation part that can be operated with a thumb or index finger in a state of having a mechanical pencil, and a connecting part that is connected to the lead tank;
The connecting portion of the lead tank moving member is arranged at a position different from the guide member in the axial direction of the lead tank and closer to the tip than the guide member,
By sliding the operation portion with respect to the outer cylinder, the lead is fed out from the tip attached to the tip of the outer cylinder,
The ballpoint pen
A guide member that has a through hole through which the ballpoint pen refill passes, and is attached to the inside of the outer cylinder;
A ball pen refill moving member that is exposed from the opening of the outer cylinder and has an operation unit that can be operated with a thumb or index finger in a state of holding a ballpoint pen, and a connection unit that is connected to the core tank;
The connecting portion of the ball-point pen refill movement member is arranged at a position different from the guide member in the axial direction of the ball-point pen refill and on the tip side of the guide member,
The writing instrument according to claim 6, wherein the tip of the ballpoint pen refill is taken out from the tip by sliding the operation unit with respect to the outer cylinder. An operation switch whose shape can be changed between a storage state stored in an opening opened in a case and a protruding state protruding from the opening,
Base and
A first side surface rotatable about the one side of the base with respect to the base;
A second side surface portion that is rotatable with respect to the first side surface portion around the other side facing the one side of the base side of the first side surface portion;
A hook that is provided on at least one of the first side surface portion and the second side surface portion and engages with an edge of the opening;
The second side surface portion is movable on one side of the base side with respect to the base.
When the engagement between the hook and the edge of the opening is released, the three-dimensional side surface formed by the base, the first side surface portion, and the second side surface portion becomes a triangular shape,
The operation switch, wherein the first side surface portion and the second side surface portion are arranged on substantially one plane when the hook and the edge of the opening are engaged. When the hook and the edge of the opening are engaged, the first side surface portion and the second side surface portion are allowed to be disposed on a substantially flat surface while elastically deforming.
When the engagement between the hook and the edge of the opening is released, the hook is restored, and the three-dimensional side shape formed by the base, the first side surface portion, and the second side surface portion is made triangular. The operation switch according to claim 8, further comprising an elastic member. A first cover portion that is in close contact with the outside of the first side surface portion; a second cover portion that is in close contact with the outside of the second side surface portion; and a side of one end in the width direction of the first cover portion; A first connecting portion that connects one side of the second covering portion in the width direction, a side of the other end of the first covering portion in the width direction, and the width direction of the second covering portion. An elastic cap having a second connecting portion that connects the end sides;
The elastic cap is elastically deformed when the hook and the edge of the opening are engaged to allow the first side surface portion and the second side surface portion to be disposed on a substantially flat surface. on the other hand,
When the engagement between the hook and the edge of the opening is released, the hook is restored, and the three-dimensional side shape formed by the base, the first side surface portion, and the second side surface portion is made triangular. The operation switch according to claim 8. The edge of the opening of the case is provided with a notch,
When the operation switch is slid from the rear end position to the front end position with respect to the case and the hook is moved to the notch position, the engagement between the hook and the edge of the opening is released. The shape of the operation switch changes from the retracted state to the protruding state,
By pushing the protruding operation switch returned to the rear end position by the spring again, the hook and the edge of the opening are engaged to change the shape of the operation switch from the protruding state to the retracted state. The operation switch according to claim 8, wherein: The first and second side surfaces oppose one side of the base side to one side of the base side at one side and the other side in the width direction of the first and second side surfaces. A step is formed so that the width becomes narrower toward the other side,
The first and second connecting portions of the elastic cap are also formed with connecting portion steps corresponding to the steps on one side and the other side in the width direction of the first and second side surface portions. The operation switch according to claim 10 or 11, wherein the operation switch is provided.

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