JPH0133357Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a knock-type writing instrument in which the writing part of the cursive is made to protrude from the tip of the barrel by knocking the presser at the rear end of the barrel.

Conventionally, if a knot-type writing instrument such as a ballpoint pen or a sharp pencil is accidentally inserted into a pocket with the writing part protruding from the tip of the barrel, the writing part may contaminate or damage the pocket. Therefore, there is a need for a lock-type writing instrument equipped with a so-called safety mechanism to prevent this.

A lock-type writing instrument equipped with such a safety mechanism has a pusher at the rear end of the barrel, and the writing body inserted into the barrel so as to be movable back and forth is urged against the pusher. A locking hole is provided at the tip of the clip attached to the rear part of the cylinder, a hole is provided in the shaft cylinder at a position opposite to the locking hole, and an engaging part that interlocks with the presser protrudes from the hole to prevent the clip from engaging. A device that can be attached to and detached from a stopper hole has been proposed, but this type of device can be accidentally attached to this pusher when folding clothes while it is inserted in a pocket, etc., or when riding on a crowded train. It has been found that when an external force is applied, the writing part of the cursive body protrudes from the tip of the barrel inside the pocket, and the writing part may contaminate or damage the pocket or the like.

Therefore, the present invention makes it impossible to insert the writing part into a pocket etc. when it protrudes from the tip of the barrel, and also prevents the writing part from being inserted into a pocket etc. even if an external force is unexpectedly applied to the presser. It is an object of the present invention to provide a knob-type writing instrument that can be carried with peace of mind by preventing protrusion from the tip of the cylinder.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

Note that although a ballpoint pen is used as the cursive writing in the figure, various other cursive writing may be used.

Reference numeral 1 is a barrel, and a presser 2 is disposed at the rear end of the barrel 1 so as to be movable back and forth a certain distance. A writing part 3a is freely inserted and urged backward by an elastic member (not shown) such as a spring.
It is in contact with the rear end of the writing body 3 having a cursive body 3. On the side of the lower end surface 2a of the presser 2, there is a safety that protrudes from a long hole 1a of the shaft cylinder 1, which is formed from a position opposite to a locking hole 4b of the clip 4 to the front of the clip attachment part 4c, which will be described later. Piece 2b (writing part 3a
When the writing part 3a is stored in the barrel, it becomes the safety piece 2b, and when the writing part 3a protrudes from the tip of the barrel, it becomes the engaging part 2b'. ) is integrally or separately protruded, and in FIG. 1, since the writing part 3a is stored in the barrel, the safety piece 2b is located in front of the clip attachment part 4c, and its protrusion The length approximately matches the height of the clip 4.

Reference numeral 4 is a clip attached to the outer surface of the rear part of the barrel 1, and the clip 4 has a V portion 4a at the front that contacts or approaches the surface of the barrel 1, and the V portion 4a has a locking portion. A hole 4b is provided. In this embodiment, a through hole 4d is provided in the front part of the attachment part 4c of the clip 4, so that the safety piece 2b fits into the through hole 4d when the writing part 3a is stored in the barrel. This prevents the writing portion 3a from further retreating, but the through hole 4d may or may not be provided, and the clip 4 may have a simple straight shape without providing a V portion.

Next, the effect will be explained.

When the presser 2 is knocked in FIG. 1, the lower surface 2a of the tip of the presser 2 presses the writing body 3 toward the tip against the elastic force of a resilient member (not shown) such as a spring. At the same time, the safety piece 2b of the presser 2 comes out of the through hole 4d of the clip 4, slides inside the long hole 1a of the shaft cylinder 1 toward the tip while lifting the clip 4 outward, and the safety piece 2b The safety piece 2b becomes an engaging part 2b' by pushing the tip of the safety piece 2b outward and passing over the V part 4a and engaging with the locking hole 4b. In this state, the writing part 3 of the cursive 3
A protrudes from the tip of the barrel 1, allowing writing. (See Figure 2) Next, if you want to store the writing part 3a of the writing body 3 in the barrel 1, you can either pull the tip of the clip 4 outward with your finger, or place it between the clip 4 and the barrel 1. When the tip of the clip 4 is expanded outward by inserting a finger and the locking hole 4b is removed from the engaging part 2b', the writing body 3 and the pusher 2 are moved by a spring (not shown) in the barrel 1. ) and returns to the state shown in Figure 1.
The writing section 3a is housed within the barrel 1. If the clip 4 is inserted into a pocket of clothes in this state, even if the pusher 2 is pressed, the safety piece 2b that interlocks with the pusher 2 will collide with the edge of the pocket, etc., making it difficult to knock the pusher 2. It becomes impossible to do so, and the writing part 3a of the writing body 3 does not protrude beyond the tip of the barrel 1.

As described above, in the present invention, when the writing part of the cursive body is stored in the barrel, the safety piece (engaging part) that interlocks with the pusher is positioned protruding from the front part of the clip attachment part, so that the writing part In the protruding state, it cannot be inserted into a pocket, etc., and after being inserted into a pocket, etc., even if an external force is unexpectedly applied to the presser, the writing part is reliably prevented from protruding from the tip of the barrel. Therefore, it can be carried with peace of mind without contaminating or damaging pockets or the like.

[Brief explanation of the drawing]

FIGS. 1 and 2 are longitudinal cross-sectional views of essential parts of a knob-type writing instrument. 1... Shaft tube, 1a... Long hole, 2... Presser, 2
b... Safety piece, 2b'... Engaging portion, 3... Cursive, 3a... Writing portion, 4... Clip, 4b...
...Latching hole, 4c...Clip attachment part.

Claims (1)

[Scope of utility model registration request] A pusher is provided at the rear end of the barrel, and a writing body inserted into the barrel so as to be movable back and forth is urged against the pusher, and a locking hole is provided at the tip of a clip attached to the rear of the barrel. and a hole is provided in the shaft cylinder at a position opposite to the locking hole, and an engaging portion that interlocks with the presser protrudes from the hole to be engaged with and detached from the locking hole of the clip. , the hole is a long hole provided across the front part of the clip attachment part, and the engaging part is located in the front part of the clip attachment part when the writing part of the writing body is stored in the barrel, and the engagement part is located in the front part of the clip attachment part and A notch-type writing instrument characterized by a safety piece that protrudes from a long hole.