JP2003220795A - Clip mounting structure - Google Patents

Abstract

(57) [Problem] To solve the problem, although the length of a spring plate connecting a shaft cylinder and a clip plate is short and a strong locking force can be obtained,
A large force had to be applied to the rear end of the clip plate for unlocking. In addition, when not in use, the writing instrument may be inserted into a pocket or the like. At this time, the clip is separated from the shaft tube, but it is not easily separated by the elastic restoring force of the spring plate. Sometimes A clip attached to a shaft cylinder via a connecting portion, wherein the connecting portion on the clip side of the connecting portion and the connecting portion on the shaft tube side are provided at different positions with respect to the longitudinal direction, and A clip mounting structure in which a straight upper part is formed in the middle part of the connecting part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clip attached to a barrel via a connecting portion.

[0002]

2. Description of the Related Art An example is described in Japanese Utility Model Laid-Open No. 62-178186. The utility model registration claim in that publication states that "a clip composed of a clip plate, a spring plate, and a ball portion having a locking portion, and a knock rod having a locking portion at a predetermined position that is axially shifted by a knocking operation. When the knocking rod is moved forward by the knocking operation so that the writing tip of the writing body projects from the tip of the shaft, the action of the spring plate engages the locking portion of the ball portion with the locking portion of the knocking rod. A clip plate or a spring plate of a clip, in which the engagement is released by pressing the rear end of the clip plate so that the front end of the writing body is retracted into the shaft. Providing a protruding piece having a notch at its front edge and bending downward at both side edges, the protruding piece serves as a ball portion having the notch as a locking portion, and continues to the rear end edge of the ball portion. Provide a bent piece on the side edge of the clip plate at the rear position and click the bent piece. Tsu writing instrument bent so as to contact the lower surface of the spring plate polymerized to the lower surface of the flops plate characterized by being integrally fixed to the caulking clip board clip. Has been described as ". That is, the elastic spring plate urges the clip to the side of the barrel and the writing body, thereby maintaining the protruding state of the writing body.

[0003]

However, although the length of the spring plate connecting the shaft cylinder and the clip plate is short and a strong locking force can be obtained, on the other hand, the clip is used for releasing the locking. I had to put a lot of force on the rear edge of the board. In addition, when not in use, the writing instrument may be inserted into a pocket or the like, and at this time, the clip is separated from the barrel, but it is not easily separated by the elastic restoring force of the spring plate. There are times when you do.

[0004]

DISCLOSURE OF THE INVENTION The present invention is a clip attached to a shaft cylinder via a connecting part, wherein the connecting part on the clip side of the connecting part and the connecting part on the shaft cylinder side are arranged in the longitudinal direction. A clip attachment structure that is provided at different positions with respect to each other and has a linear portion formed in the intermediate portion of the connecting portion. That is the summary.

[0005]

[Example] A mechanical pencil is placed inside the barrel,
A description will be given by taking as an example a so-called retractable writing instrument (mechanical pencil) in which the mechanical pencil projects by pressing a knock member arranged at the rear portion, but the invention is not limited to this. The item arranged inside may be a ball-point pen, or not only a writing instrument, but also an electronic input pen or the like. Further, the invention is not limited to the retractable writing instrument, but may be applied to a general writing instrument that protects the pen tip of a ballpoint pen by attaching and detaching a cap, for example. A front member 2 is detachably fixed to the front end of a resin or metal shaft cylinder 1 by means such as screwing, but the shaft cylinder 1 is composed of a front shaft 1a and a rear shaft 1b. And they are detachably fixed by screwing. The grip member 3 is inserted in the front portion of the front shaft 1a, and the grip member 3 will be described in detail later. Inside the barrel 1, a center shaft 4 is disposed so as to be movable back and forth, and a tip 6 is detachably fixed to the tip of the center shaft 4 by means such as screwing. At the tip of the tip tool 6, a lead protection tube 7 for guiding and guiding the lead
Is press-fitted and fixed, but may be formed integrally with the tip tool 6. The tip tool 6 and the lead protection tube 7 are normally biased rearward by the elastic member 23 and housed in the barrel 1. However, the tip of the tip member 2 is moved by the forward movement of the center rod. It can be projected from. The front shaft 1
An engaging protrusion 1c is formed inside a, and engages with an engaging groove 4a formed on the front outer periphery of the center shaft 4. That is, the center shaft 4 is arranged so as to be unable to rotate, although it can be moved back and forth with respect to the front shaft 1a (shaft cylinder 1). This allows the tip 6 and the center shaft 4 to be easily attached and detached.

On the other hand, a clip 9 which is biased in the radial direction of the shaft cylinder 1 is fixed to the rear portion of the shaft cylinder 1, and a ball portion 10 is formed inside the tip of the clip 9. An auxiliary engaging portion 11 is formed at the tip of the ball portion 10, and when the center shaft 4 moves forward and the lead protection tube 7 or the like protrudes, if it is not blocked by the engaging portion described later,
The auxiliary engaging portion 11 is brought into contact with the auxiliary shaft 11 to prevent the backward movement of the center shaft 4. That is, when the center shaft 4 moves forward, the front portion of the clip 9 rotates so as to fall in the radial direction of the barrel 1, and the engaging portion 11 of the clip 9 engages with the rear end portion 12 of the center shaft 4. Here, the clip 9
Is composed of a clip body 13 and an elastic connecting member 14. One end of the connecting member 14 is connected to the barrel 1
, And the other end is fixed to the clip body 13. More specifically, a bent portion 15 is formed in the intermediate portion of the connecting member 14. The bent portion 15 is formed at a position separated from the connecting member 14 and the fixed portion 16 of the shaft tube 1. That is, the fixing portion 1 with the clip body 13 is provided at a position apart from the fixing portion 16 of the shaft cylinder 1.
7 is provided. And this separated part A
Even if the entire area of the above is used, the connecting member 14 is elastically deformed (see FIG. 4). Further, the distance of the separated portion A is formed larger than the separated distance B between the clip 9 and the barrel 1. Although not limited to this, if the distance relationship between them is the same or becomes shorter, the elastic deformation action of the separated portion A may not be sufficiently obtained. Further, the clip 9 in the present example abuts on the outer surface of the center rod 4 at its front end to prevent the clip 9 from entering in the radial direction. As a result, the contact of the ball portion 10 with the later-described core tank is avoided, and thus, the sliding core tank is prevented from being damaged. Further, the front end portion of the connecting member 14 is bent and formed in an L shape, and this portion abuts on the engaging portion 12 of the center shaft 4 and the engaging portion 14a.
Has become. That is, the engaging portion 14a of the connecting member 14
Substantially abuts on the center shaft 4, and in the unlikely event that this abutment portion 14a
When is broken, the auxiliary engaging portion 11 comes into contact.

Further, the core tank 1 is provided inside the center shaft 4.
8 is slidably arranged, and a chuck body 20 for gripping and releasing the lead is fixed to the front end of the lead tank 18 via a joint member 41 and a relay member 19. Also,
A chuck ring 21 that opens and closes the chuck body 20 surrounds the front portion of the chuck body 20. A core detent member 22 made of a rubber-like elastic body for preventing the retreat of the core is located in front of the chuck body 20, and the core detent member 22 is press-fitted / fixed to the inner surface of the tip tool 6. Has been done. Reference numeral 8 is an elastic member such as a coil spring that biases the lead tank 18 and the chuck body 20 backward. On the other hand, an eraser holder 24 is press-fitted and fixed to the rear portion of the lead tank 18, and an eraser 25 is attached to the eraser holder 24 with a washer 26.
It is removably inserted through. A knock member 27 is detachably attached to the eraser holder 24 so as to cover the eraser 25. Reference numeral 28
Is an O-ring made of a rubber-like elastic body surrounded by a crown 29, and the O-ring 28 is colored to indicate the diameter of the core to be used. Regarding the diameter display of the core, the recess 3 is formed on the top surface of the knock member 27.
0 may be formed, and a seal 31 or the like having the diameter of the core may be attached to the recess 30. By forming the concave portion 30, it is possible to prevent peeling of the seal 31 and peeling of the printed matter (see FIGS. 5 and 6).

A metal grip cylinder 32 is disposed in front of the shaft cylinder 1 in a state of being sandwiched between the step portion 33 of the front shaft 1a and the tip member 2, but integrally with the tip member 2. You may form. The grip cylinder 32 will be described in detail. The surface of the grip cylinder 32 is knurled (see FIG. 2), and the knurl area 34 has
A plurality of through holes 35 are formed. An elastic protrusion 36 made of a rubber-like elastic body is exposed from the through hole 35. The elastic protrusions 36 are connected inside the grip cylinder 32. More specifically, the plurality of elastic protrusions 36 are formed on the surface of the rubber-like elastic cylinder 37 at equal intervals.
The elastic protrusion 36 has an elliptical shape, and the protrusion amount R from the knurl region 34 is set to 0.3 mm, but it is allowed within the range of 0 mm to 1.0 mm. The amount of protrusion from the knurl region in this example refers to the length from the top of the knurl to the top of the elastic protrusion. Also,
One piece of the knurled region 34 has a diamond shape, and the angle of the acute angle portion of the diamond is formed to be 60 degrees. An arc is formed at the top and the valley of the knurl, the radius of curvature of the arc is 0.06 mm, and the angle between the top and the valley is 90 degrees. Furthermore, the distance (height) from the valley to the top is 0.
The pitch of the knurls is 2 mm, and the pitch of the knurls is 0.5 mm in this example.
Allowed in the range of 0.7 mm. In this example,
Although the elastic projection is projected from the inside of the grip cylinder, the elastic projection is attached to the surface of the grip cylinder where the through hole is not formed by insert molding, adhesion or welding.
You may fix it.

A window hole 38 is formed in the rear portion of the grip cylinder 32 so that the seal portion, which indicates the hardness of the core attached to the corresponding position of the front shaft 1a, can be visually recognized. ing. Of course, various hardnesses are described on the seal, and the seal can be easily selected by relatively rotating the front shaft 1a and the grip cylinder 32. As a modified example, means shown in FIG. 7 can be considered. More specifically, the rear portion of the grip cylinder 32 is cut to form a window hole 39 and form a separate ring member 40. As a result, the ring member 40 can be rotated without giving sliding resistance to the front shaft 1a of the rubber-like elastic cylinder 37, so that the core hardness can be selected more easily. Further, since the ring member 40 itself is not sandwiched from the longitudinal direction, the ring member 40 is not crushed and deformed by the clamping force, which allows the ring member 40 to be thinned and the hardness display of the core is easy to see. Become.

Next, a usage example will be described. When the knock member 27 is pressed, the center rod 4 and the lead tank 18 move forward against the resilient force of the resilient member 23, and the tip tool 6 and the lead protection tube 7 project from the tip of the tip member 2. To do. At this time, the rear end 12 of the center shaft 4 is engaged with the engaging portion 14 of the connecting member 14.
By engaging with a, the backward movement by the restoring force of the elastic member 23 is prevented (see FIG. 8). At this time, although the clip 9 is temporarily separated from the barrel 1, the separated portion A of the connecting member 14 is also curved and deformed. Here, if the knock member 27 is further pressed, the lead tank 18 and the chuck body 20 are advanced, and the lead feeding operation is performed. When it is desired to store the tip tool 6 in the tip member 2 again, the clip 9 is pushed up by pushing its rear portion, and the engagement portion 14a and the rear end 12 of the center shaft 12 are pushed.
To disengage from. Also at this time, as described above, the separated portion A of the connecting member 14 is also curved, and the front of the clip 9 is lifted. By the release, the center shaft 4 and the like return to the rear by the elastic member 23. In this example, in this retracted state of the center shaft, the chuck body expands to release the core. That is, even if the lead is stored in a protruding state, the lead is released, so that the lead can be easily stored even if an external force is applied. Further, since the center shaft is retracted in the state where the chuck body is expanded, it is possible to prevent the core of the chuck body from being cut off due to an impact when reaching the final retracted position.

[0011]

The present invention is a clip attached to a shaft cylinder via a connecting portion, wherein the connecting portion on the clip side of the connecting portion and the connecting portion on the shaft cylinder side are at different positions in the longitudinal direction. Since the linear portion is formed in the intermediate portion of the connecting portion, the clip can be easily separated.

[Brief description of drawings]

FIG. 1 is an external view showing an example of the present invention.

FIG. 2 is a vertical half sectional view of FIG.

FIG. 3 is a sectional view of a main part showing a front shaft and a center shaft, and a bottom view.

FIG. 4 is a longitudinal half sectional view of an essential part showing the operation.

FIG. 5 is a top view showing a modified example of the knock member.

6 is a vertical cross-sectional view of FIG.

FIG. 7 is a longitudinal half sectional view of a main part showing a modification of the core hardness display.

[Explanation of symbols]

1-axis cylinder 2 Tip member 3 Grip member 4 center axis 6 Tip 7 core protection tube 8 Repulsion member 9 clips 10 Tamabe 11 Engagement part 12 Rear end 13 clip body 14 Connection member 15 Bend 16 Fixed part 17 Fixed part 18-core tank 19 Joint member 20 chuck body 21 chuck ring 22 Core detent member 23 Repellent material 24 eraser holder 25 eraser 26 washer 27 knock member 28 O-ring 30 crown 31 seal 32 grip tube 33 Ring member 34 Knurled area 35 through hole 36 Elastic protrusion 37 Rubber-like elastic tube 38 windows 39 windows 40 ring member 41 Joint member A remote part B separation distance

Claims (3)

[Claims] 1. A clip attached to a shaft tube via a connecting part, wherein a connecting part on the clip side of the connecting part and a connecting part on the shaft tube side are provided at different positions in the longitudinal direction, A clip attachment structure, wherein a straight line portion is formed at an intermediate portion of the connecting portion. 2. A clip attached to a shaft cylinder via a connecting part, wherein a distance between the connecting part on the clip side of the connecting part and the connecting part on the shaft cylinder side in the longitudinal direction is defined by:
The clip mounting structure is characterized in that it is larger than the distance in the separating direction between the shaft cylinder and the clip. 3. The clip attachment structure according to claim 1, wherein a bent portion is formed in an intermediate portion of the connecting portion.