JPH0217909Y2 - - Google Patents

Description

[Detailed description of the invention] This design allows the writing lead such as a ballpoint pen or pencil lead to be moved in and out using a bending method, and the pen tip can be moved in and out without changing the pen itself when in use or not. In addition, by increasing the space volume of the rear outer cylinder, it is easy to install accessories such as a watch in the space, and it is possible to write in a stable state by eliminating inadvertent bending or shaking during use. It is designed so that the bending operation can be performed smoothly.

The present invention will be described in detail with reference to the embodiment of the ballpoint pen shown in FIGS. 1 and 2. The bending mechanism 3 allows the front outer cylinder 1 and the rear outer cylinder 2 to be bent freely, and the ballpoint pen re-heal which can be moved in and out by bending operation. 4, and the bending mechanism 3 has a fitting part 6 on the outside of the front outer cylinder 1.
It consists of a main shaft pipe 8 which is protruded rearward through a fixed body 7 formed with a solid body 7, and a deflector 9 screwed onto the tip of the rear outer cylinder 2. The distal end of the bending/sliding device 9 has a rounded tip with a tapered tip smoothing portion 11, which fits into the fitting portion 6 and the bending/sliding device 9.
A clamping collar 12 provided around the inner wall of the main shaft pipe 8 is pressed rearward by a spring 10, and the front part of a conical ring-shaped bending fixture 13 is formed integrally with the outer periphery of the main shaft pipe 8 so that the outer periphery tapers toward the rear. 13' and is in strong pressure contact with the bending fixture 13, the inclined surface 13'' of the bending fixture 13 faces the inner wall surface 9' of the bending slider 9, and a fitting recess is provided in the front surface of the clamping collar 12. A groove 12' is bored into which the end of the spring 10 is fitted.

The stopping mechanism 5 of the ballpoint pen reheal 4 includes a spring 16 that is provided in the internal space 15 of the base 14 of the ballpoint pen reheal 4 and presses the ballpoint pen reheal 4 rearward.
an insertion tube 17 into which the ballpoint pen reheal 4 is inserted and protrudes rearward through the main shaft pipe 8; a push-expansion cam 18 fixed to the front part of the insertion tube 17 and spread rearward; and the push-expansion cam 18. A floating ring 20 is inserted between the stoppers 19 fixed at a predetermined interval so as to be freely movable back and forth, three or more elastic lock claws 21, 21 on the inner wall of the front outer cylinder 1, and the rear end of the insertion cylinder 17. It consists of a conical cap 22 that is removably inserted into the cap 22 and a pressing body 25 provided with a conical surface 24 that is pressed against the sliding head 23 of the cap 22. It is fixed at A locking groove 26 that deepens toward the front is provided around the middle 17' of the crowned part of the insertion tube 17 on which the cap 22 is attached, and a spiral groove is formed between the rear end position of the insertion tube 17 and the cap 22. Cap 2 with spring 27 interposed
2 is constantly pressed against the inner surface of the conical surface 24 of the pressing body 25.

The outer diameter of the floating ring 20 is larger than the outer diameter of the pushing and expanding cam 18, and the floating interval of the floating ring 20 is such that when the floating ring 20 is pushed up, the floating ring 2
0 and the pushing and expanding cam 18, there is an elastic lock claw 21,
This is the gap into which 21 is inserted. It is better to embed a sphere (not shown) in the sliding head so that it can slide freely.

In the figure, 28 is a space in the rear outer cylinder 2, 29 is a clip, and 30 is an upper cap.

To use this ballpoint pen, the bending mechanism 3 is bent forward or backward or left or right from the state shown in FIG. 1, so that the sliding head 23 slides on the conical surface 24 and is positioned toward the hem. Therefore, the insertion tube 17 and the ballpoint pen refill 4 are pushed forward against the spring 16 by the depth of the conical surface 24, and the pen tip protrudes forward from the base 14. At the same time, the locking claws 21, 21 slide off the pushing and expanding cam 18, and at the same time they scrape up the floating ring 20 and enter between the pushing and spreading cam 18 and the floating ring 20 as shown by the chain line. In this way, even when the bending mechanism 3 is returned to its original straight position, the ballpoint pen reheal 4 is not retracted and is always in the writing state. At the same time, the sliding head 23 is pushed by the spiral spring 27 and is at the deepest position of the conical surface 24. , and the edge 22' of the cap 22 is located slightly rearward of the locking groove 26.

By further bending the bending mechanism 3, the slide head 23 located at the deepest position of the conical surface 24 is pushed by the intermediate surface of the conical surface 24 and becomes bent as shown in FIG. The rear insertion cylinder 17 is pushed forward by being engaged with the stop groove 26. At this time, insertion tube 1
The stopper 19 of No. 7 pushes the floating ring 20 against the intrusion of the lock claws 21, 21, and the floating ring 2
Position the lock claws 21, 21 on top of 0. In this way, by returning the bending mechanism 3, the insertion tube 17 is pushed by the spring 16 and retracted, but at this time, the pushing and expanding cam 1
8 and the front part of the floating ring 20 touch and move backward, and at the same time, the lock claws 21, 21 touch the floating ring 20.
The first one is located on the circumferential surface of the expanding cam 18 by sliding it away.
The state becomes the solid line shown in the figure.

The embodiment shown in FIG. 3 is a lead-feeding sharp pencil, and the bending mechanism 3 that makes the front outer cylinder 1 and the rear outer cylinder 2 flexible is the same as that of the ballpoint pen shown in FIG. A cap 22 is mounted on the upper end of the core tube 4 (corresponding to a ballpoint pen reheel) that can be inserted into the main shaft pipe 8, and the sliding head 23 of the cap 22 is pressed against the conical surface 24, and the coiled spring 27 is not necessary. I don't. In this case, the inner surface of the conical surface 24 moves the cap 22 back and forth by the bending operation of the bending mechanism 3,
This back-and-forth movement causes the lead A to be paid out in sequence. If you want to retract the wick, push it in while it is bent.

As mentioned above, the present invention has a bending mechanism 3 that allows the front outer cylinder 1 and the rear outer cylinder 2 to bend freely, so the pen tip or lead can be inserted and removed without changing the pen while writing. It is convenient to operate, and the clamping tsuba 1
2 is pressed backward by the spring 10, and the main shaft pipe 8
A conical ring-shaped bending fixture 13 whose outer periphery tapers toward the rear is brought into surface contact with the front part 13' of the bending fixture 13, and the inclined surface 13'' of the bending fixture 13 is brought into surface contact with the inside of the bending slider 9. Since it faces the wall surface 9', when writing, the front part 13' of the bending fixture 13 presses the clamping collar 12 through surface contact, so that the user can always write in a stable and straight state with less accidental bending or shaking. In addition, during the bending operation, the outer peripheral edge of the bending fixture 13 comes into contact with the inner wall surface 9' and serves as a fulcrum, and the bending slider 9
Since the inner wall surface 9' is bent sequentially along the inclined surface 13'', smooth bending operation can be performed.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional explanatory diagram of the proposed writing instrument;
Figures A, B, and C are cross-sectional explanatory views showing the operating states of the insertion tube, cap, and pusher, and Figure 3 is a cross-sectional view of a sharp pencil according to another embodiment. 1 is a front outer cylinder, 2 is a rear outer cylinder, 3 is a bending mechanism,
8 is the main shaft pipe, 9 is the deflector, 9' is the inner wall surface,
13 is a bending fixture, 13' is a front part, and 13'' is an inclined surface.

Claims (1)

[Scope of utility model registration request] In a flexible writing instrument in which a front outer cylinder 1 and a rear outer cylinder 2 are connected in a flexible manner and a writing lead is moved in and out by a bending operation, the bending mechanism 3 has a fitting part 6 at the rear of the front outer cylinder 1. It consists of a main shaft pipe 8 that protrudes rearward through a fixed body 7 formed with
and inserts the distal end slip portion 11 of the deflector 9 into the fitting portion 6.
At the same time, the clamping collar 12 provided around the inner wall of the bending/sliding device 9 is pressed rearward by the spring 10, and this clamping collar 12 is fixed to the main shaft pipe 8 so that the outer circumference becomes tapered toward the rear. A bendable writing instrument in which a front surface 13' of a conical ring-shaped bendable fixture 13 is brought into surface contact, and an inclined surface 13'' of the bendable fixture 13 faces an inner wall surface 9' of a bendable slider 9.