JP2004181668A - Retractable writing utensil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a retractable writing utensil which is simply structured for locking/unlocking a retracting operation; has a limited number of components and a refined appearance; and can be easily assembled at a low cost with another advantage that its grip can be fabricated easily and cheaply. <P>SOLUTION: This retractable writing utensil has an operating member arranged to be movable relatively with an outer fitting having a clip and a refill which retracts from the outer fitting by interlocking with the operating member. In addition, the retractable writing utensil locks/unlocks the action to protrude the refill at least by horizontally moving the grip to the operating member and eccentrically sets the grip in the opposite direction to its moving direction to the operating member. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a retractable writing implement having an operation member that moves relatively to an exterior body having a clip, and a refill body that moves in and out of the exterior body in conjunction with the operation member.
[0002]
[Prior art]
As an example, there is one in which a rotating cam mechanism composed of a plurality of members is arranged in a shaft cylinder, and locking and releasing of a refill stored in the shaft cylinder is performed by repeatedly pressing a knock portion (Patent) Reference 1).
In addition, in some cases, a material shape or the like is specified so as to achieve both rigidity and elasticity in a bending direction in consideration of appearance and durability (see Patent Document 2).
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 9-99691 (column of solution means, FIGS. 3 to 7).
[Patent Document 2]
JP-A-2000-168292 (paragraphs 0033 to 0035, FIG. 6).
[0004]
[Problems to be solved by the invention]
However, in the prior art as described above, although the mechanism for locking / unlocking the writing / unloading by the pressing operation of the pressing body is used, the mechanism for locking / unlocking the indentation is complicated. In addition, the number of parts is large, the assembly is troublesome and the cost is high. In addition, since the mechanism is incorporated in the rear portion of the inside of the barrel, the length of the barrel must be increased accordingly.
In addition, the processing method of the metal clip is difficult due to the complexity of the shape, and therefore, the cost has been increased.
[0005]
[Means for Solving the Problems]
The present invention is a retractable writing implement comprising a refill body which is disposed with an operation member which moves relatively to an exterior body having a clip, and which interlocks with the operation member and which protrudes and disappears from the exterior body. The gist of the present invention is to maintain and release the protruding state of the refill by moving the clip with respect to the operation member at least in the horizontal direction, and eccentrically moving the clip with respect to the operation member in a direction opposite to the moving direction. Things.
[0006]
[Action]
The mechanism for locking / unlocking the projection is simple, the number of parts is small, the assembly is simple and the cost is low, and the mechanism for locking / unlocking the projection is not built in the rear part inside the barrel. In addition to the advantage that the length of the barrel can be shortened by the same amount, the appearance and the stability over time are also improved, and it is an easy and inexpensive metal clip processing method. There is no fear that the knock member is easily pressed and soils the clothes.
[0007]
【Example】
One example is shown in FIGS. 1 to 9 and described. In FIG. 1 (outer view), FIG. 2 (outer view showing a state in which the pen tip protrudes from the front shaft), and FIG. 3 (longitudinal sectional view in FIG. 1), front shaft 2 is screwed in front of exterior body 1. It is attached detachably (hereinafter, the upper side in the figure is called back, and the lower side is called front). A gripping member 3 made of a soft resin or rubber material is fixed to the front shaft 2, and a resilient member 4 such as a coil spring is attached to the inside of the front shaft 2. It is fixed and attached to the inner hole. A refill 5 to which a pen tip T such as a ball-point pen is attached is urged rearward by the repelling member 4 and is arranged inside the exterior body 1 and the front shaft 2 so as to be movable back and forth.
[0008]
In FIG. 4 which is an enlarged longitudinal sectional view of only the rear part of FIG. 1, an operation member 6 made of polyoxymethylene resin is in contact with the rear end of the refill 5 urged rearward of the exterior body 1. The operating member 6 has a sliding cylinder portion 6a and an engaging portion 6b. A lateral hole 1a is formed in the exterior body 1, and the engaging portion 6b is fitted into the lateral hole 1a slidably back and forth. A clip unit 7 integrally formed with a mounting base 7a and a clip ball 7c made of polycarbonate resin and a metal deformed plate (clip body) 7b is press-fitted into the rear end opening of the exterior body 1. It is fixed by. Note that the clip unit 7 is resiliently urged in a direction approaching the exterior body 1 and also has a horizontal elastic force that is a direction orthogonal to the direction approaching the exterior body 1. ing.
The step 6c of the operating member 6 is in contact with the front end of the cylindrical portion 7d of the clip 7 to prevent the clip 6 from slipping backward.
[0009]
FIG. 5 shows the shapes of the engaging portion 6b and the clip ball 7c, the positional relationship between the engaging portion 6b and the clip ball 7c, and the state of engagement. FIG. 4 is a perspective view showing seven scenes from the pen tip storage state to the pen tip storage state through the pen tip projection locking state and back to the pen tip storage state, as viewed from the back side in FIG. In FIG. 5 only, the direction of the drawing is changed, and the left side in the drawing is referred to as the rear, and the right side in the drawing is referred to as the front (the right side in the drawing is the pen tip side).
No. The engaging portion 6b in the perspective view of 1 (initial pen tip storage state) and below has an engaging overhanging portion 6d projecting in the lateral direction to get over the clip ball 7c at the time of pen tip projecting engagement. It has a climbing inclined surface 6e which is a surface that first comes into contact with the clip ball 7c. The deviation angle when the engaging portion 6b moves over the clip ball 7c is determined by the climbing inclined surface 6e. In this example, it is set to 45 °. The engaging portion 6b has a concave portion 6f on the side surface, and an engaging concave portion 6g which is in contact with and engages with the front end of the clip ball 7c on the front side of the concave portion 6f. The concave portion 6f is open at the upper side in the drawing, and has a second climbing inclined surface 6i that extends rearward to the upper surface portion 6g.
[0010]
The positional relationship between the engaging portion 6b and the clip ball 7c and the state of engagement will be described in detail. When the operating member 6 is pressed against the bias of the repelling member 4, the perspective view No. The engaging portion 6b in 1 moves forward. When further pressed, the climbing inclined surface 6e of the engaging portion 6b comes into contact with the rear end of the clip ball 7c. In this state, the climbing inclined surface 6e and the clip ball 7c are in line contact or point contact. (See perspective view No. 2). When the pressing is continued, the clip ball 7c is displaced in the lateral direction (the front side in the drawing) by the climbing inclined surface 6e. When the pressing is further continued, the engaging portion 6b moves to the side of the clip ball 7c (see perspective views No. 3 and No. 4). Here, when the pressing of the operating member 6 is released, the engaging portion 6b moves backward, but the clip ball 7c is restored to the far side in the drawing by the lateral elasticity of the clip 7, and enters the concave portion 6f to engage the engaging member. Since the engaging portion 6b comes into contact with the concave portion 6g, the engaging portion 6b is engaged with the clip ball 7c (see the perspective view No. 5).
[0011]
In order to release the engaged state, when the operating member 6 is pressed again, the engaging portion 6b moves forward, and the second riding slope 6i pushes up the clip ball 7c. The engagement between the clip ball 6b and the clip ball 7c is released. When the upper surface portion 6h of the engaging portion 6b reaches the lower surface of the clip ball 7c in the drawing, the clip ball 7c slides the upper surface portion 6h of the engaging portion 6b in the lateral direction due to the lateral elasticity of the clip 7. To return to the far side in the figure (see perspective view No. 6).
Here, when the pressing of the operation member 6 is released, the engaging portion 6b moves below the clip ball 7c and returns to the initial state (see the perspective view No. 7).
In the present invention, when the refill 5 is exposed from the front end of the front shaft 2 and the writing instrument is to be inserted into a pocket or the like in the engaged state, the clip ball 7c of the clip 7 is lifted from the outer peripheral surface of the exterior body 1. . By this operation, the engagement between the engagement portion 6b and the clip ball 7c is released, the initial state is restored, and the refill 5 is also immersed in the front shaft 2.
[0012]
6 and 7 show the deformed plate portion 7b. Metallic deformable plate portion 7b is from the top of l ¹ parts inserted into the mounting base portion 7a is bent approximately 180 ° on the vertical plane (l ² parts) are formed, in the axial direction with a slight angle (FIG. and right) bent in 7, substantially straight portion thereof bent portion from (l ² parts) downward (l ³ parts) are formed.
8 and 9 show a structure for attaching the clip unit 7 to the exterior body 1. FIG. A slightly protruding bulging portion 7e is formed on one side surface of the mounting base 7a. The mounting base 7a in which the bulging portion 7e is formed is press-fitted into the rear end opening of the exterior body 1, but is eccentric to the exterior body 1. That is, it is press-fitted in a state where it is shifted rightward in FIG. This is due to the bulging portion 7e formed on the one side surface. These shapes are formed so that the clip ball 7c is brought closer to the engaging portion 6b side and the durability is improved in the positional relationship between the engaging portion 6b and the clip ball 7c shown in FIG. It also serves to absorb variations due to bending of the metal plate.
[0013]
【The invention's effect】
The present invention is a retractable writing implement comprising a refill body which is disposed with an operation member which moves relatively to an exterior body having a clip, and which interlocks with the operation member and which protrudes and disappears from the exterior body. The projecting state of the refill is maintained / released by moving the clip with respect to the operating member at least in the horizontal direction, and the clip is eccentric with respect to the operating member in a direction opposite to the moving direction. The mechanism for stopping and releasing is simple, the number of parts is small, the assembly is simple and the cost is low, and in addition to the mechanism for locking and releasing the projection, the shaft is not built into the rear part of the barrel. It has the advantage of being able to shorten the length of the cylinder, and also has an improved appearance, making it easy and inexpensive as a clip processing method. Is intended there is no fear that would soil the clothes.
[Brief description of the drawings]
FIG. 1 is an external view illustrating the present invention.
FIG. 2 is an external view showing a state in which a pen tip protrudes from a front shaft.
FIG. 3 is a partial cross-sectional view taken along line AA of FIG. 1; FIG.
FIG. 5 is a partial perspective view showing a positional relationship between an engagement portion and a clip ball.
FIG. 6 is a plan view showing the shape of the deformed plate portion.
FIG. 7 is a rear view showing the shape of the deformed plate portion.
FIG. 8 is an external view of a clip unit.
FIG. 9 is an external view of a clip unit.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Exterior body 1a Side hole 2 Front shaft 3 Gripping member 4 Repelling member 5 Refill 6 Operating member 6a Sliding cylindrical part 6b Engaging part 6c Step part 6d Engagement climbing part 6e Riding slope 6f Depression 6g Engagement concave 6h Top surface Part 6i Second riding slope 7 Clip 7a Mounting base 7b Deformed plate part 7c Clip ball 7d Tube part 7e Swelling part T Pen tip

Claims (4)

A retractable writing instrument comprising a refill body that is disposed relative to an exterior body having a clip and moves in and out of the exterior body in conjunction with the operation member, wherein the refill is in a protruding state. And holding and releasing the clip by moving the clip with respect to the operating member at least in the horizontal direction, and displacing the clip with respect to the operating member in a direction opposite to the moving direction. The clip includes a resin base, a metal clip body fixed to the base, and a clip ball provided on a free end side of the clip body, and the clip ball is formed on the operation member. 2. The retractable writing implement according to claim 1, wherein an engagement projection is formed to engage and disengage with the engagement portion. The retractable writing implement according to claim 1 or 2, wherein the clip is eccentrically fixed with respect to a base. The retractable writing instrument according to claim 1 or 2, wherein the base is fixed eccentrically to an exterior body.

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