JPH0219273Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a knock-type writing instrument in which the writing part of the cursive body is made to protrude from the tip of the barrel by knocking a 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 demand 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, which is movable back and forth inside the barrel, is urged against the pusher. A locking part is provided at the tip of the clip attached to the rear, and by knocking the presser, the engaging part that interlocks with the presser is engaged with the locking part of the clip, and the writing part of the cursive is attached to the tip of the barrel. A device with a pusher that is more protruding has been proposed, but when folding clothes while the pusher is still inserted in a pocket, or on a crowded train, an external force is unexpectedly applied to the pusher. When this happens, the writing part of the cursive will protrude from the tip of the barrel inside the pocket,
It has been found that pockets, etc., may be contaminated or damaged by the writing section, which is an inconvenience.

In an attempt to eliminate such inconveniences, the present applicant first developed a safety piece that protrudes from the hole in the barrel at a position facing the clip and interlocks with the presser when the writing part of the cursive is stored in the barrel. They proposed a notch-type writing instrument that was placed at the front of the clip attachment part, but as they developed labor-saving techniques such as lowering costs and reducing the number of parts, new problems were discovered. That is, if an attempt is made to simplify the above-mentioned presser, engaging portion, and safety piece by integrating them, there is a problem that this integrally molded product cannot be stored in the shaft cylinder during actual assembly work. .

The present invention was developed in view of these circumstances, and its purpose is to prevent the writing part from protruding from the tip of the barrel even if an external force is unexpectedly applied to the presser after it is inserted into a pocket etc. Needless to say, it is an object of the present invention to provide a knob-type writing instrument that reduces costs and also simplifies assembly work.

The present invention will be described in detail below based on examples.

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 inside the rear of the barrel 1 there is a pusher 2a that is movable back and forth a certain distance, and a locking element connected from the tip end surface 2b of the pusher 2a to the side tip. Engagement portion 2d integrally protrudes from joint piece 2c
and a thin-walled portion 2 connected rearward from the tip surface 2b.
A resin-made integrally molded article 2 consisting of a safety piece 2f that can swing freely in and out directions via e is housed so as to be movable back and forth, and the engaging part 2d and the safety piece 2f are connected to a clip 5 which will be described later. It always protrudes from the hole 1a provided in the shaft cylinder 1 at a position facing the . Reference numeral 3 is a writing body disposed in the barrel 1 so as to be movable back and forth, and is urged backward by an elastic member 4 such as a spring, and the rear part of the writing body 3 is in contact with the tip surface 2b. , which also presses the integrally molded product 2 backward. Reference numeral 5 denotes a clip attached to the rear portion of the barrel 1, and a locking portion 5a is provided at the forward end of the clip 5. When storing and arranging the integrally molded article 2 consisting of the engaging portion 2d, safety piece 2f, and pusher 2a in the shaft cylinder 1, the engaging portion 2d is directed forward and inserted through the rear opening of the shaft cylinder 1. However, at this time, the engaging part 2d bends inward with the engaging piece 2c, and the safety piece 2f also bends inward with the thin wall part 2e, so the integrally molded part 2 is easily inserted into the shaft cylinder 1. Insertion is now possible, and if you move it in the direction of the arrow shown in FIG. The work of storing and arranging the objects 2 can be completed extremely simply and easily.

When writing with the above configuration, when the presser 2a is knocked, the tip surface 2b presses the writing body 3 toward the tip against the elastic force of the elastic member 4. At the same time, the engaging part 2d and the safety piece 2f located in front of the attachment part 5b of the clip 5 also slide toward the tip inside the hole 1a of the barrel 1, and the engaging part 2d presses the tip of the clip 5 outward. and engages with the locking portion 5a. In this state, the writing part 3a of the cursive body 3 is
It protrudes from the tip and can be written on. (See Figure 2) When storing the writing part 3a of the writing body 3 in the barrel 1, either pull the tip of the clip 5 outward with your finger or press the rear end of the clip 5 inward. Expand the tip of the clip 5 outward by doing something like
When the locking part 5a is removed from the engaging part 2d, the writing body 3 and the integrally molded object 2 are pushed backward by the elastic member 4 in the barrel 1 and return to their original positions as shown in FIG. The writing section 3a of No. 3 is housed within the barrel tube 1. If the clip 5 is inserted into a pocket or the like in this state, even if the pusher 2a is pressed, the safety piece 2f that interlocks with the pusher 2a will collide with the edge of the pocket, etc., so the pusher 2a will not be knocked. , the writing part 3a of the writing body 3 does not protrude beyond the tip of the barrel 1. It is particularly preferable that the rear part of the writing body be located inside the safety piece in order to prevent the safety piece from bending inward when inserted into a pocket or the like.

The present invention constructed as described above prevents the writing part from being inserted into a pocket, etc. when it protrudes from the tip of the barrel, and prevents external force from being applied to the pusher unexpectedly after the writing part is inserted into the pocket, etc. Since the writing part can be prevented from protruding from the tip of the barrel even when the writing part is in the cursive type, it is possible to prevent the writing part of the cursive writing part from staining the pocket etc. as much as possible, and it can be carried with confidence at all times. The pusher, engagement part, and safety piece, which are all essential parts of a writing instrument, are integrally formed, making assembly easier, which not only reduces costs but also improves productivity. It has various excellent effects such as:

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and are shown in Fig. 1,
FIG. 2 is a longitudinal sectional view thereof, and FIG. 3 is a sectional view showing its assembled state. DESCRIPTION OF SYMBOLS 1... Shaft cylinder, 1a... Hole, 2a... Presser, 2d... Engagement part, 2e... Thin wall part, 2f... Safety piece, 3...
Cursive writing, 3a...writing part, 5...clip, 5a...locking part, 5b...clip attachment part.

Claims (1)

[Scope of utility model registration request] A depressor is provided at the rear end of the barrel, a writing body is arranged within the barrel so as to be movable back and forth, and the writing is urged against the presser, and the writing body is placed at the tip of a clip attached to the rear of the barrel. A locking portion is provided, and by knocking the presser, the engaging portion interlocking with the presser is engaged with the locking portion of the clip, so that the writing portion of the writing body protrudes from the tip of the barrel, and the clip A hole is provided in the barrel at a position opposite to the barrel, and a safety piece that protrudes from the hole and interlocks with the presser when the writing part is stored in the barrel is arranged in the front part of the clip attachment part. In the writing instrument, the presser;
A notch-type writing instrument characterized in that a safety piece that can freely swing inward and outward directions via an engaging part and a thin wall part is formed by integral molding.