JPH0217912Y2 - - Google Patents

Description

[Detailed explanation of the invention] In the conventional lock-type ballpoint pen, a gap is provided between the tip hole of the barrel and the tip of the re-feel so that the tip can move smoothly in and out of the tip hole. Since there is also a gap in the radial direction between the main body and the barrel, the tip hits the inner surface of the tip hole of the barrel when writing, producing an unpleasant sound and impairing the writing feel. To solve this problem, it is possible to attach a steady rest device to the re-seal, such as the one seen in Japanese Utility Model Application Publication No. 51-145229, but in that case, it is possible to prevent the tip from wobbling, but it is difficult to store the re-sail protruding. There were some negative effects. The purpose of the present invention is to solve this problem by making the re-feel through hole of the spring holder of the return spring in a lock-type ballpoint pen slightly larger than the outside diameter of the re-feel, and by aligning the center of the through-hole with the re-feel. By making the tip slightly eccentric to the center of the tip hole of the barrel where the tip appears and retracts, the axial center line of the re-feel is slightly inclined with respect to the axial center line of the barrel between the re-feel through hole and the tip hole of the barrel. , the tip of the refill is brought into contact with the inner surfaces of both the refill through hole of the spring receiver and the tip hole of the barrel, thereby preventing the tip from wobbling and preventing the tip from wobbling. The rear end corner of the taper on the outer surface of the front end is brought into line contact with the taper on the inner surface of the shaft cylinder by the spring force of the return spring, and is slightly movable in the axial and radial directions with respect to the shaft cylinder, thereby making it possible to project and store the re-reel. It is something that allows you to do it smoothly.

To explain the illustrated embodiment, first, the spring receiver 5 is inserted into the shaft cylinder 1 up to the vicinity of its tip taper. This spring receiver 5 has a through-hole 4 of the re-reel whose inner diameter is slightly larger than the outer diameter of the re-reel 2.
The center of the through hole 4 is slightly eccentric with respect to the center of the barrel tip hole 3. Spring receiver 5
has an outer diameter slightly smaller than the inner diameter of the shaft cylinder 1, and its front end outer surface is tapered, and the rear end corner of the taper is shaped to be in line contact with the taper of the shaft cylinder 1. Next, the slider 6 incorporating the rear end of the re-feel 2 is inserted from behind with the return spring 7 interposed between its front end surface and the rear end surface of the spring receiver 5. Therefore, the spring receiver 5 is brought into line contact with the inner surface of the shaft cylinder 1 by the spring force of the return spring 7. The re-feel 2 is of course inserted into the through hole 4 of the spring receiver 5. At this time, the rear end of the refiel 2 is assembled into the slider 6 and fixed at the center of the shaft cylinder, but the front part of the refiel 2 is eccentrically placed by the spring receiver 5, so the refiel 2 is elastically bent slightly and always springs. Through hole 4 of receiver 5
This also touches the inner surface of the barrel tip hole 3, and prevents the tip of the reel from wobbling.
Furthermore, when the re-feel 2 is extended and retracted, even if the re-reel 2 is in contact with the inner surface of the through hole 4 of the spring receiver 5, the spring receiver 5 remains in line contact with the shaft cylinder only due to the spring force of the return spring 7. Since it is in contact with the inner surface, the frictional resistance can be weakened by slightly shifting the position in the radial and axial directions, thereby making it possible to smoothly protrude and store the refiel 2. For example, if the outer diameter of the reel is 2.30 mm, the inner diameter of the shaft tip hole is 2.4 mm, the inner diameter of the spring receiver through hole is 2.35 mm,
The eccentricity of 0.05 mm and the spring force of 300 g are sufficient for practical use.

In the figure, 8 is a spring guide, 9 is a slide button, 10 is a buffer spring, 11 is a locking spring, 12
indicates a receiving pipe.

The present invention is constructed as described above, and the center of the refill through hole of the spring receiver is slightly eccentric with respect to the center of the tip hole of the shaft tube, and the refill is connected to the inner surface of the through hole of the spring receiver and the inner surface of the tip hole of the shaft tube. Since the tip of the re-feel is made to protrude from the tip hole of the barrel while it is in contact with both of the re-feel, the tip of the re-feel is prevented from wobbling when writing. Since it is in line contact with the inner surface of the cylinder and is slightly movable in the axial and radial directions with respect to the shaft cylinder, it has the effect that the re-feel can be smoothly extended and retracted.

[Brief explanation of the drawing]

The figure shows an embodiment of the present invention.
The figure is a longitudinal sectional view, and FIG. 2 is an enlarged sectional view of the main part. 1... Shaft tube, 2... Refill, 3... Tip hole, 4... Spring receiver through hole, 5... Spring receiver,
6...Slider, 7...Return spring, 8...Spring guide, 9...Slide button, 10...
Buffer spring, 11...locking spring, 12...receiving pipe.

Claims (1)

[Scope of utility model registration request] The re-feel through hole of the spring holder of the return spring in a lock-type ballpoint pen is made to have a slightly larger diameter than the outer diameter of the re-feel, and the center of the through-hole is set slightly relative to the center of the tip hole of the barrel where the tip of the re-feel appears and retracts. With the re-feel eccentrically brought into contact with both the inner surface of the through hole of the spring receiver and the inner surface of the tip hole of the shaft tube, the tip thereof is projected from the tip hole of the shaft tube, and the outer surface of the front end of the spring receiver is tapered. A ballpoint pen in which the rear end corner is brought into line contact with the taper on the inner surface of the barrel by the spring force of a return spring, and is slightly movable in the axial and radial directions with respect to the barrel.