JP4849619B2 - Sliding multi-core writing instrument - Google Patents

Description

  The present invention relates to a slide-type multi-core writing instrument in which a plurality of writing bodies are arranged in a shaft cylinder.

  Conventionally, as disclosed in Japanese Patent Application Laid-Open No. 2001-239791 “Slide-type multi-core writing instrument”, a plurality of writing bodies are arranged in a shaft cylinder, and a coil spring is provided at the rear end of each writing body. Slidably accommodates the slide members arranged to be urged in the direction of the rear end of the shaft tube, with the raised portions formed on each slide member protruding from the window formed on the rear end portion of the shaft tube, By sliding one raised portion in the direction of the tip of the shaft tube, the locking portion formed on one slide member is locked to the locked portion formed in the rear end of the shaft tube, so that one of the writing bodies The release protrusion formed on the other slide member comes into contact with one slide member by projecting the tip end portion of the shaft tube from the opening portion of the shaft tube tip end and sliding the other raised portion toward the tip end of the shaft tube. Unlock one locking part that was locked to the other, and The tip of the other cursive body is moved to the tip of the shaft cylinder by sliding the raised portion of the shaft toward the tip of the shaft cylinder and locking the other locking portion to the other locked portion formed at the rear end of the shaft cylinder. A slide-type multi-core writing instrument that can protrude from the opening is well known.

  In addition, as illustrated in Japanese Patent Application Laid-Open No. 2001-239791 “Slide-type multi-core writing instrument”, in the conventional slide-type multi-core writing instrument, the shape of the raised portion of the slide member is easy to come into contact with the finger, In consideration of safety, the longitudinal section has a substantially arc shape.

  By the way, since the slide-type multi-core writing instrument slides with a finger in contact with the raised portion, in order to improve operability, the height of the raised portion is increased to increase the protruding amount of the raised portion from the window portion. Alternatively, it is preferable to increase the width so that the raised portion easily comes into contact with the finger.

In addition, a recess extending in the width direction is formed on the top surface of the raised portion in Japanese Patent Application Laid-Open No. 8-187789 “Knock member of the knock type writing instrument”, A slide member having a non-slip portion for preventing slipping is shown.
"JP 2001-239791 A" "Japanese Patent Laid-Open No. 8-18789"

  However, if the height of the raised portion is increased or the width is increased, the volume of the raised portion increases, and it is also true that sinks and distortions are likely to occur in the raised portion due to pressure differences during molding and cooling time differences during solidification. is there.

  Further, in order to operate the slide member of Patent Document 2, it is necessary to place a finger parallel to the shaft center of the shaft tube and to slide in the tip direction of the shaft tube while pressing in the shaft center direction. On the other hand, the slide member of Patent Document 1 can slide the slide member toward the axial tube tip opening portion by applying a pressing force from the diagonal direction or the axial tube rear end direction with the finger in contact with the rear end side of the raised portion. Therefore, it does not require a pressing force in the axial direction, and operability is good.

  Furthermore, since the shaft tube is generally a cylindrical body, when operating the raised portion, a force in the rotational direction is applied and the finger may come off from the raised portion. It was necessary to manipulate the ridge.

  An object of the present invention is to provide a slide-type multi-core writing instrument in which a raised portion of a slide member can be easily slid in the axial tube tip direction, and the raised portion is less prone to sink or distortion.

In order to achieve the above-mentioned object, the present invention achieves the above-mentioned object by providing a plurality of writing bodies in the shaft cylinder by urging them in the direction of the rear end of the shaft cylinder by means of coil springs, and raising the slide members attached to the rear ends of the respective writing bodies. The part is slidably accommodated in a state of projecting outward from a window part formed integrally with the rear end part of the shaft cylinder or in the attached member, and the raised part is slid in the tip end direction of the shaft cylinder, thereby In the slide-type multi-core writing instrument capable of projecting and retracting the writing tip part from the opening of the shaft tube tip, the raised part of the slide member is raised with the same width as the rear end part of the slide member, and the longitudinal section is substantially omitted. with an arc shape, on the top surface of the front Symbol ridges, a recess extending toward the Jikuto distal direction, the wall surface of the recess of the raised portion, characterized in that a substantially arc shape.

  The present invention can provide a slide-type multi-core writing instrument in which the raised portion of the slide member can be easily slid in the axial tube tip direction and the raised portion is less prone to sink and distortion.

  Embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same members and parts indicating the same portions.

  The slide-type multi-core writing instrument 1 of the present invention is slidable by a rear shaft 3 screwed to the rear end portion of the front shaft 2 and urged rearward by a resilient member 13 to the rear end of the rear shaft 3. The sliding body 4 is disposed on the front shaft 2, the rear shaft 3, and the sliding body 4, and the ballpoint pen A and the mechanical pencil B are urged rearward by the coil springs 14 and 15 and stored therein.

  In the ballpoint pen A, a tip member 7 holding a ball 8 rotatably is press-fitted and attached to the tip of the ink containing cylinder 6. The mechanical pencil B has a tip pipe 10 fitted to a lead core case 9. Further, the front end portions of the slide members 11 and 12 serving as operating bodies are press-fitted into the rear end openings of the ink containing cylinder 6 and the lead core case 10, and the raised portions 11 a and 12 a are windows formed on the slide body 4. It is held so as to protrude from the outer peripheral surface of the shaft tube from the portion 4a. A crown 5 is attached to the rear end of the sliding body 4.

  When the mechanical pencil B is used, the front shaft 2 or the rear shaft 3 is gripped, a finger is brought into contact with the rear end side of the raised portion 6, and the raised portion 12 a is slid in the direction of the distal end opening 2 a of the front shaft 2. Thus, the locking portion 12b of the slide member 12 is locked to the locked portion 4b formed on the sliding body 4, thereby causing the tip pipe 10 of the mechanical pencil B to protrude from the tip opening 2a of the front shaft 2. The sliding body 4 is pressed in the direction of the front end opening 2a of the front shaft 2 to feed out the lead core for use.

  When using the ballpoint pen A from the state in which the tip pipe 10 of the mechanical pencil B protrudes from the tip opening 2 a of the front shaft 2, the front shaft 2 or the rear shaft 3 is gripped and the rear end side of the raised portion 11 is The release protrusion 11c of the slide member 11 is engaged with the locked portion by sliding the raised portion 11a in the direction of the distal end opening 2a of the front shaft 2 by abutting a finger. When the locking portion 12b is pushed out and the locking of the slide member 12 is released, the slide member 12 returns to the original state by the elastic force of the coil spring 15. Further, by pressing the raised portion 11a in the direction of the front shaft tip opening 2a, the locking portion 11b of the slide member 11 is locked to the locked portion 4b, and the tip member 7 of the ballpoint pen A is projected and used. be able to.

  Since the raised portions 11a and 12a of the slide members 11 and 12 have an arc shape in the longitudinal section, the fingers can easily come into contact with the rear ends of the raised portions 11a and 12a, and the raised portions 11a and 12a have a safe shape. When the finger 12a is operated with a finger, it is pressed (in the direction of arrow B) in the direction of the tip opening 2a of the front shaft 2 while abutting and applying pressure (in the direction of arrow A) to the rear end side of the raised portions 11a, 12a. The slide members 11 and 12 are slid in the direction of the front end opening 2a of the front shaft 2 and the ballpoint pen A and the mechanical pencil B can be easily moved in and out, so that the pressing force in the direction of the axis J (arrow C direction) It is possible to perform a slide operation without pressing while adding.

  Moreover, the slide type multi-core writing instrument 1 of the present invention forms a concave portion H extending toward the tip of the shaft tube on the top surface of the raised portions 11a, 12a of the slide members 11, 12, thereby raising the raised portions 11a, Even when a force in the rotational direction D is applied when operating 12a, it is difficult to remove the finger from the raised portions 11a, 12a by the recess H, so that it is not necessary to strongly grip the front shaft 2 or the rear shaft 3.

  Further, by forming the concave portion H extending in the direction of the tip opening 2a of the front shaft 2 on the top surface of the raised portions 11a, 12a, the volume of the raised portions 11a, 12a is reduced, and the pressure difference during molding Due to the cooling time difference to be solidified, it is possible to make it difficult to cause sink marks and distortions in the raised portions 11a and 12a.

  The shape of the concave portion formed on the top surface of the raised portion in the present invention is not particularly limited, but by making the wall surface of the concave portion into a substantially arc shape, it is easy to closely contact the finger pad even with a weak force, and smoothly rises. This is preferable because the portion can be slid in the axial direction. Further, since the volume of the raised portion is reduced and the portion in contact with the finger is widened, it is most preferable to form the recess H on the entire top surface.

  In the present embodiment, for the sake of convenience, the locked portion and the window portion are formed on the sliding body, but an attachment member formed with the locked portion and the window portion may be formed integrally with the shaft tube.

  The slide type multi-core writing instrument of the present invention is not limited to the above-mentioned two-core multi-pencil writing instrument, and a plurality of writing instruments such as two, three or four ball-point pens or a mechanical pencil and a ball-point pen are arranged. It can be used for the slide type multi-core writing instrument provided.

1 is a longitudinal sectional view showing a slide type multi-core writing instrument of Example 1. FIG. It is a figure which shows the state which protruded the mechanical pencil in FIG. It is a principal part expanded sectional view in which a part was omitted in FIG. FIG. 3 is an enlarged cross-sectional view of a main part, partly omitted in FIG. 2. It is an expansion external view of a slide member. It is the external view seen from the E direction of the slide member in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sliding multi-core writing instrument 2 Front shaft 2a Tip opening 3 Rear shaft 4 Slider 4a Window 4b Locked portion 5 Head crown 6 Ink storage cylinder 7 Ball pen tip 8 Ball 9 Lead core case 10 Tip pipe 11, 12 Slide member 11a, 12a Protruding part 11b, 12b Locking part 11c, 12c Release protrusion 11d, 12d Ball part 13 Elastic member 14, 15 Coil spring A Ballpoint pen B Mechanical pencil H Concave part

Claims (1)

In the shaft cylinder, a plurality of writing bodies are urged and arranged in the direction of the rear end of the shaft cylinder by a coil spring, and the raised portion of the slide member attached to the rear end of each writing body is integrated with the rear end section of the shaft cylinder. By slidably storing in a state protruding outward from the window formed in the attachment member, the writing tip of the writing body is moved from the tip of the shaft tube by sliding the raised portion in the direction of the shaft tube. in multi-core writing instrument retractable sliding protuberance of the slide member, raised on a rear portion of the same width of the slide member, and with a longitudinal section and a substantially arcuate shape, before Symbol ridges A slide-type multi-core writing instrument , wherein a concave portion extending toward the tip of the shaft tube is formed on the top surface, and a wall surface of the concave portion of the raised portion is substantially arc-shaped .

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