JP5345002B2 - Clip attachment structure for writing instruments - Google Patents

Description

  The present invention relates to a clip mounting structure for a writing instrument that includes a clip mounted member and a clip member, and the clip member is swingably connected to the clip mounted member.

  Conventionally, many types of clip mounting structures of this type are known, and a coil spring is interposed between the clip member and the clip mounting member to urge both of them in the direction away from each other. Many are also known. For example, in the device described in Patent Document 1, the rear end portion of the outer cylinder is a certain thickness portion, and the leg portion of the rear end portion of the clip member is not detached from the vertical hole provided in the thick portion. The coil spring is interposed between the leg portion and the bottom of the vertical hole.

  However, in the configuration of Patent Document 1, there is a problem that a thick portion for the clip member must be provided at the rear end portion of the writing instrument, and the use of the internal space of the writing instrument is restricted.

  Therefore, the present applicant has proposed a clip mounting structure that can mount a clip member and a coil spring therefor in Patent Document 2 without occupying the space inside the writing instrument. In this clip mounting structure, a coil spring that urges the clip member and the clip mounted member in a direction away from each other is inserted, and one end of the coil spring is provided on the outer surface of the clip mounted member. The other end of the coil spring is inserted into a recess provided on the surface of the clip member facing the clip attached member.

Japanese Utility Model Publication No. 5-45517 Utility Model Registration No. 3139401

  An object of the present invention is to provide a clip mounting structure that improves Patent Document 2 and can more reliably prevent the coil spring from falling off and can improve the appearance.

In order to achieve the above object, the invention according to claim 1 of the present invention comprises a clip attached member and a clip member, and the clip member is connected to the clip attached member in a swingable manner. In the mounting structure,
A coil spring that urges the clip member and the clip attached member in a direction away from each other is interposed, and at least one surface of the clip member or the clip attached member faces either one. The surrounding portion includes a first surrounding portion and a second surrounding portion that are arranged along the central axis of the coil spring, and the first surrounding portion is an end portion of the coil spring. The second surrounding portion surrounds at least another portion of the end of the coil spring and opens the remaining peripheral portion, and surrounds the first surrounding portion. The entire circumference of the end portion of the coil spring is surrounded by the second surrounding portion.

  According to a second aspect of the present invention, in the first aspect of the present invention, each of the open portions of the first surrounding portion and the second surrounding portion that open the peripheral portion of the end portion of the coil spring is a coil spring. It is provided in the side which mutually opposes with respect to the central axis of this.

  According to a third aspect of the present invention, in the one according to the second aspect, the pair of shaft portions formed in one of the clip attached member and the clip member are formed in a pair of receiving holes formed in the other. The clip-attached member and the clip member are swingably connected to each other, and the directions of the open portions of the first surrounding portion and the second surrounding portion are the directions of the pair of shaft portions. It corresponds to the protruding direction or the hole axial direction of the pair of receiving holes.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the surrounding portion is formed continuously with the connecting portion in which the shaft portion or the receiving hole is formed.

  The invention according to claim 5 is the one according to any one of claims 1 to 4, wherein the other end of the coil spring is surrounded by either the clip member or the clip attached member. An annular rib is formed.

  According to the present invention, the surrounding portion includes the first surrounding portion and the second surrounding portion arranged along the central axis of the coil spring, and the first surrounding portion surrounds a part of the end portion of the coil spring. And the second surrounding portion surrounds at least another part of the end of the coil spring and opens the remaining portion, and the first surrounding portion and the second surrounding portion are used to open the coil spring. Since the entire periphery of the end portion of the coil spring is surrounded, the surrounding portion can reliably prevent the coil spring from falling off.

  Further, since the end portion of the coil spring can be covered to some extent by the surrounding portion, it is possible to prevent the coil spring as a mechanical component from being exposed to the outside, and to improve the appearance.

  Furthermore, the open portions of the first enclosure and the second enclosure are provided on the sides facing each other, so that the enclosure is molded in the direction of contact with each other through the portion corresponding to the open portion. The slide block that slides can be formed.

  Further, the protruding direction of the shaft portion formed in either the clip attached member or the clip member or the hole axial direction of the receiving hole is the direction of the opened portion of each of the first surrounding portion and the second surrounding portion. With the slide block that slides toward and away from each other, the shaft portion or the receiving hole, the first surrounding portion, and the second surrounding portion can be formed together, and the forming is easy. Can be.

  Furthermore, the overall dimension of the clip mounting structure can be reduced by forming the surrounding portion continuously with the connecting portion.

  Further, by forming the annular rib surrounding the other end of the coil spring, it is possible to prevent the coil spring from falling off more reliably.

It is a longitudinal cross-sectional view showing the whole writing instrument with which the clip attachment structure of the writing instrument of this invention was implement | achieved. (A) of the tail cap as a clip attachment member is a side view, (b) is a plan view, (c) is a longitudinal sectional view, (d) is a front view, and (e) is a main part rear view. It is a perspective view of the tail crown as a clip attachment member. (A) of a clip member is a side view, (b) is sectional drawing. It is an enlarged view of the clip attachment structure of the writing instrument of this invention, (a) always represents, (b) represents the time of rocking | fluctuation of a clip member. It is explanatory drawing which shows the relationship between the tail crown as a clip attachment member, and a slide block, (a) is the state which the slide block separated from each other, (b) is the state which the slide block approached mutually.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiment.

  FIG. 1 is a longitudinal sectional view showing the entire writing instrument in which the clip mounting structure of the writing instrument of the present invention is realized. Although the writing instrument 10 of this example is a mechanical pencil, it is not restricted to this, It can apply to arbitrary writing instruments, such as a ball-point pen. The writing instrument 10 includes a front shaft 11, a rear shaft 12 screwed to the rear end of the front shaft 11, a tip tool 14 screwed to the tip of the front shaft 11, and the periphery of the front portion of the front shaft 11. A cylindrical elastic grip 16 and a core feeding mechanism 18 which is a cursive body disposed in the front shaft 11. Any known configuration can be applied to the core feeding mechanism 18, and the description thereof is omitted.

  A tail crown 20 as a clip attached member is attached to the rear end of the rear shaft 12. The tail cap 20 is manufactured by molding a synthetic resin material (for example, a polycarbonate resin material, an ABS resin material) and attached to the rear end of the rear shaft 12. In a state in which the tail cap 20 is attached to the rear shaft 12, the lead tank 19 that is a part of the cursive body passes substantially through the rear shaft 12 and is attached to the rear end of the lead tank 19. An eraser cradle 21 protrudes from the rear end of the rear shaft 12 and the tail crown 20, and an eraser is inserted into the eraser cradle 21.

  As shown in FIGS. 2 and 3, the tail cap 20 is roughly expanded in the outer diameter direction from a ring-shaped main body 20a attached to the outer peripheral surface of the rear end of the rear shaft 12, and the outer peripheral surface of the main body 20a. And a surrounding portion 20c extending in the outer diameter direction from the outer peripheral surface of the main body 20a continuously to the rear side of the connecting portion 20b.

  As shown in FIGS. 2 (d) and 2 (e), the main body 20 a is formed with a polygonal portion 20 d that fits with the rear shaft 12 on its inner peripheral surface, and for fitting with the rear shaft 12. A small protrusion 20e is formed. The rear portion of the rear shaft 12 is press-fitted into the main body 20 a, the front end of the main body 20 a abuts on a stepped portion 12 a (FIG. 1) formed on the outer peripheral surface of the rear shaft 12, and the polygonal portion 20 d is the outer periphery of the rear shaft 12. The tail crown 20 is fixedly attached to the rear shaft 12 by engaging with the polygonal portion 12b (FIG. 1) formed on the surface and engaging the small protrusion 20e with the outer peripheral surface of the rear shaft 12.

  As shown in FIGS. 2C and 2D, the connecting portion 20b has a U-shaped portion 20f having a laterally U-shaped cross section, and the central hole and the U-shaped portion of the main body 20a. The inside of 20f communicates. Then, a pair of cylindrical shaft portions 20h and 20h project outward from both side surfaces of the U-shaped portion 20f. The cylindrical shaft portions 20h and 20h have a shape in which the upper side of the protruding end is slightly cut out.

  An encircling portion 20c is continuously formed at the rear portion of the connecting portion 20b. The surrounding portion 20c includes a first surrounding portion 20m provided on the main body 20a side and a second surrounding portion 20n provided on the upper side of the first surrounding portion 20m, that is, on the clip member side.

  More specifically, the shape of each of the first surrounding portion 20m and the second surrounding portion 20n in plan view is such that the inner peripheral surface has an approximately semicircular arc shape and the outer peripheral surface has an approximately U-shape, The directions are opposite to each other. As a result, the shape of the first surrounding portion 20m and the second surrounding portion 20n in plan view is a rectangular shape in which the inner peripheral surface is circular and the outer peripheral surface is integrated with the connecting portion 20b. Then, the U-shaped ends of the first surrounding part 20m and the second surrounding part 20n are connected to each other. In addition, the open portions 20m1 and 20n1 of the first surrounding portion 20m and the second surrounding portion 20n are provided on the sides facing each other, and the directions thereof coincide with the protruding directions of the cylindrical shaft portion, respectively. This coincides with the pivot center axis of the clip member 22 described below.

  The clip member 22 roughly includes a clip plate portion 22a and clip side plate portions 22b extending from both side edges of the clip plate portion 22a toward the rear shaft 12 and the tail crown 20, respectively. Each clip side plate portion 22b is formed with a receiving hole 22c for receiving each cylindrical shaft portion 20h, and a groove portion 22f is formed so as to be continuous with the receiving hole 22c. A ring-shaped annular rib 22d is formed on the inner surface of the clip plate portion 22a at a position behind the receiving hole 22c. And the rear part of the clip board part 22a becomes the curved part 22e which became convex upwards.

  When the cylindrical shaft portion 20h of the corresponding tail crown 20 is fitted into the receiving hole 22c of the clip member 22, the clip member 22 is swingably connected to the tail crown 20, and the axial direction of the rear shaft 12 Along the outer side of the rear shaft 12. The upper side of the protruding end of the cylindrical shaft portion 20h is notched, and the clip member 22 is formed with a groove portion 22f connected to the receiving hole 22c. Therefore, the cylindrical shaft portion 20h is inserted into the receiving hole 22c. When the cylindrical shaft portion 20h cut out moves to the receiving hole 22c along the groove portion 22f, the insertion operation can be performed smoothly.

  Normally, a coil spring 24 is interposed between the clip member 22 and the tail crown 20 so that the tip of the clip member 22 is pressed against the outer surface of the rear shaft 12 so that a clamping force is generated therebetween. The coil spring 24 is inserted behind the connecting portion 20b and biases the tail crown 20 and the clip member 22 in a direction away from each other.

  One end of the coil spring 24 is surrounded by the surrounding portion 20 c of the tail crown 20, and the other end is inserted into the annular rib 22 d of the clip member 22, so that the coil spring 24 is disposed between the tail crown 20 and the clip member 22. The Both ends of the coil spring 24 are restrained by the surrounding portion 20c and the annular rib 22d.

  More specifically, the first surrounding portion 20m surrounds at least one surface side of the end portion of the coil spring 24, the remaining portion of the end portion of the coil spring 24 is opened by the opened portion 20m1, and the second surrounding portion The portion 20n surrounds at least the other surface side of the end portion of the coil spring 24, and the remaining portion of the end portion of the coil spring 24 is opened by the opened portion 20n1, and the first surrounding portion 20m and the second surrounding portion 20n. And surrounds the entire circumference of the end of the coil spring 24.

  In the clip mounting structure configured as described above, the tip of the clip member 22 is normally urged by the coil spring 24 in a direction in which the tip of the clip member 22 is pressed against the rear shaft 12 as shown in FIG. . When an object is sandwiched between the clip member 22 and the rear shaft 12, if the curved portion 22 e at the rear end of the clip member 22 is pressed, the clip member 22 swings against the urging force of the coil spring 24. Then, since the gap between the front end of the clip member 22 and the rear shaft 12 opens, an object can be inserted between them and the object can be sandwiched between them.

  It is preferable that the surrounding portion 20c and the annular rib 22d have a height that does not interfere with each other when the clip member 22 swings. By enclosing one end of the coil spring to some extent by the surrounding portion 20c, the height of the annular rib 22d can be made low.

  As described above, since the coil spring 24 is surrounded by the surrounding portion 20c, the coil spring 24 can be reliably prevented from falling off, and the surrounding portion 20c can surround a substantial portion of the coil spring 24. Therefore, it is possible to prevent the coil spring 24, which is a mechanical component, from being exposed to the outside, and to improve the appearance. Further, since the curved portion 22e is curved, the coil spring 24 becomes more difficult to see.

  Furthermore, by forming the surrounding portion 20c from the first surrounding portion 20m and the second surrounding portion 20n, it is possible to easily form the tail crown 20 itself provided with the surrounding portion 20c. FIG. 6 is an explanatory diagram, and since the opened portions 20m1 and 20n1 of the first surrounding portion 20m and the second surrounding portion 20n face each other, the opened portions 20m1 and 20n1 are formed. Therefore, the slide blocks S1 and S2 can be slid in the contact / separation direction through the portions corresponding to the opened portions 20m1 and 20n1.

  In particular, since the directions of the opened portions 20m1 and 20n1 of the first surrounding portion 20m and the second surrounding portion 20n coincide with the protruding direction of the cylindrical shaft portion 20h, the cylindrical shaft is moved by the same slide blocks S1 and S2. The portion 20h and the surrounding portion 20c can be molded, and can be easily molded without complicating the mold. Since the cylindrical shaft portion 20h of the connecting portion 20b also protrudes on the opposite sides on both sides, the slide blocks S1 and S2 for forming an undercut portion by these cylindrical shaft portions 20h are formed into the cylindrical shaft portion 20h. This is because it is necessary to slide toward and away from each other from both sides of the part.

  Moreover, since the surrounding part 20c is continuously formed in the connection part 20b, the whole dimension of a clip attachment structure can be made small.

  Further, since the coil spring 24 is disposed outside the rear shaft 12 and the tail crown 20, the internal space of the rear shaft 12 and the tail crown 20 can be used effectively. Since the lead tank 19 is disposed through the rear shaft 12, the lead tank 19 can have a large length and the lead can be replenished to the lead tank 19 from the rear side of the writing instrument 10.

  In the above example, the surrounding portion is formed on the tail cap 20 which is a clip attached member. However, the present invention is not limited to this, and a shaft cylinder such as a rear shaft or a front shaft may be used as the clip attached member. Is possible.

  In the above example, the surrounding portion is provided on the clip attached member. However, the present invention is not limited to this, and the surrounding portion can be provided on the clip member. Both the clip attached member and the clip member can be provided. It is also possible to provide it.

  Further, in the above example, the shaft portion is formed in the connecting portion of the clip attached member, and the receiving hole is formed in the clip member, but conversely, the receiving hole is formed in the connecting portion of the clip attached member, A shaft portion may be formed on the clip member. Or a shaft part may be formed in the connection part of a clip member, and a receiving hole may be formed in the connection part of a clip member. In either case, it is preferable that the direction of the opened portions of the first surrounding portion and the second surrounding portion coincide with the hole axial direction of the receiving hole or the protruding direction of the shaft portion, which facilitates molding. is there. Moreover, although it is suitable if the surrounding part is formed continuously with the connection part, it is not restricted to this, The enclosure part and the connection part may be formed separately.

10 Writing Instruments 20 Tail Crown (Clip Mounted Member)
20b connecting portion 20c surrounding portion 20m first surrounding portion 20m1 opened portion 20n second surrounding portion 20n1 opened portion 24 coil spring

Claims (5)

In a clip mounting structure for a writing instrument comprising a clip mounted member and a clip member, wherein the clip member is swingably connected to the clip mounted member.
A coil spring that urges the clip member and the clip attached member in a direction away from each other is interposed, and at least one surface of the clip member or the clip attached member faces either one. The surrounding portion includes a first surrounding portion and a second surrounding portion that are arranged along the central axis of the coil spring, and the first surrounding portion is an end portion of the coil spring. The second surrounding portion surrounds at least another portion of the end of the coil spring and opens the remaining peripheral portion, and surrounds the first surrounding portion. A clip mounting structure for a writing instrument, wherein the entire circumference of the end portion of the coil spring is surrounded by the second surrounding portion.   The open portions of the first surrounding portion and the second surrounding portion that open the peripheral portion of the end portion of the coil spring are provided on the sides facing each other with respect to the central axis of the coil spring. The clip mounting structure according to claim 1.   A pair of shafts formed on one of the clip-attached member and the clip member are inserted into a pair of receiving holes formed on the other, so that the clip-attached member and the clip member can swing. And the direction of each open part of the first surrounding part and the second surrounding part coincides with the protruding direction of the pair of shaft parts or the hole axial direction of the pair of receiving holes. The clip mounting structure according to claim 2, wherein:   The clip mounting structure according to claim 3, wherein the surrounding portion is formed continuously with the connecting portion in which the shaft portion or the receiving hole is formed.   5. The annular rib surrounding the other end of the coil spring is formed on the other of the clip member and the clip-attached member, according to claim 1. Clip mounting structure.

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