JPH0343037Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a lock-type writing instrument with a built-in writing instrument cartridge in which the elastic member is expanded and contracted by an appropriate ejection and retraction mechanism, and the writing portion can be ejected and retracted from the tip of the barrel.

Conventionally, the writing part of a cartridge for writing instruments such as ballpoint pens, felt-tip pens, resin pens, etc. using water-based ink that is elastically repelled backward by an elastic member such as a spring and placed inside the barrel is retracted from the tip of the barrel using an appropriate retraction mechanism. In the case of such a knot-type writing instrument, when the writing instrument cartridge is stored in the barrel after use, the writing instrument cartridge moves backward due to the elastic force of the elastic member, and is subjected to various shocks at its retreated position. A problem had arisen. That is, in the case of the so-called raw ink type in which the ink is directly stored in the cartridge, there are problems of ink leakage in which the water-based ink filled in the cartridge moves and flows out of the cartridge, and In the case of so-called batting type cartridges that contain an ink-absorbing substance inside the cartridge, the batting inside the cartridge may shift, resulting in poor contact with the writing section or relay lead, resulting in ink smearing and ink not continuing when writing again. It is.

Therefore, this invention was developed when storing the writing instrument cartridge.
This writing instrument aims to solve the above-mentioned problem by devising a device to reduce the impact applied to the writing instrument cartridge, and the elastic member can be expanded and contracted by an appropriate mechanism to make the writing part extend and retract from the tip of the barrel. In a lock-type writing instrument with a built-in cartridge, in addition to the elastic member that urges the writing instrument cartridge toward the rear of the barrel, there is a locking part provided on the inner wall of the barrel, and a locking part of the writing implement cartridge provided in front of the locking part. The gist of the present invention is a knob-type writing instrument characterized in that an elastic member is disposed between the writing part and the writing part to reduce the size only when the writing part is stored in the barrel.

A detailed description will be given below based on the accompanying drawings. still,
In the figure, a ballpoint pen using water-based ink is shown as the writing instrument cartridge, but a felt-tip pen,
Various resin pens and the like can be used.

In FIG. 1, reference numeral 1 is a shaft cylinder,
An annular locking portion 1a is provided on the inner wall of the barrel 1, and a ballpoint pen cartridge 2 is placed inside the barrel 1 and urged rearward by an elastic member 3 such as a spring. The ballpoint pen cartridge 2 has an annular locking portion 2a located in front of the locking portion 1a.
An elastic member 4 made of a spring or the like is arranged in a contracted state between the locking portion 1a and the locking portion 2a. Reference numeral 5 denotes a retractable mechanism installed at the rear of the shaft cylinder 1. To explain this retractable mechanism 5, a presser 6 is disposed at the rear end of the shaft cylinder 1 so as to be able to move forward and backward by a certain distance. A locking member 7 connected to
The inner stage 7a of the locking member 7 is brought into contact with the rear end of the ballpoint pen cartridge 2, and the engaging portion 7b protruding from the side tip of the locking member 7 projects outward from the hole 1b of the barrel 1. Reference numeral 8 denotes a clip, and this clip 8 has a V-shaped portion 8a at the front end that contacts or approaches the surface of the shaft tube 1, and this V-shaped portion 8a has a hole 1b of the shaft tube 1.
A locking hole 8b is provided opposite to the locking hole 8b.

Next, the effect will be explained.

When the writing part 2b of the ballpoint pen cartridge 2 is made to protrude from the tip of the barrel 1, the pusher 6 is clicked and the ballpoint pen cartridge 2 is pushed out through the locking member 7.
When pressed forward against the elastic force of the spring 3, the engaging portion 7b of the locking member 7 also moves forward within the hole 1b of the barrel 1, pushing the tip of the clip 8 outward. Then, it crosses over the V-shaped portion 8a and engages with the locking hole 8b, so that the writing portion 2b of the ballpoint pen cartridge 2 protrudes from the tip of the barrel 1 and becomes ready for writing (see FIG. 2). At this time, the elastic member 4 is no longer reduced and has a free length.

When storing the writing part 2b of the ballpoint pen cartridge 2 in the barrel 1, push the tip of the clip 8 outward with your finger or push down the rear part of the clip 8 to secure the engaging part 7b of the locking member 7. Clip 8
When removed from the locking hole 8b, the ballpoint pen cartridge 2, locking member 7, and pusher 6 move rearward due to the elastic force of the spring 3. Here, as shown in FIG. 1, a space S is provided in advance at the inner stage 7a of the locking member 7 and the rear part of the engaging portion 7b.
Even if the elastic force of the spring 3 moves the ballpoint pen cartridge 2 backward from the state shown in FIG.
Due to the action of the elastic member 4 disposed at the rear of the ballpoint pen cartridge 2, no impact is applied to the ballpoint pen cartridge 2 in its retreated position, and the backward movement force is alleviated, and the ballpoint pen cartridge 2 is in the state shown in FIG. It fits. Incidentally, an elastic body such as urethane may be placed in the space S described above.

As described above, the present invention provides a lock-type writing instrument with a built-in writing instrument cartridge in which the writing part can be retracted and retracted from the tip of the barrel by an appropriate mechanism, which includes a locking part provided on the inner wall of the barrel, and a locking part provided at the front of the locking part. An elastic member is placed between the locking portions of the writing instrument cartridge provided in the writing instrument cartridge, so that the elastic member shrinks only when the writing portion is stored in the barrel.
When the writing instrument cartridge is stored, the elastic member reduces the impact on the writing instrument cartridge.
This can eliminate as much as possible the problems that occur in the past when the writing instrument cartridge is stored, such as ink leaking or ink smearing. In addition, this impact-reducing effect can be maintained for a long time because the elastic force of the elastic member is selectively utilized by shrinking the elastic member only when the writing part is stored in the barrel. It is possible. Furthermore, when the writing instrument cartridge is stored (when not in use),
Since it is supported by the elastic member, even if it is dropped when not in use, the impact will not be directly applied to the writing instrument cartridge.

It goes without saying that in the present invention, an appropriate projecting and retracting mechanism other than the above-described projecting and retracting mechanism can be employed.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and are shown in FIG.
FIG. 2 is a longitudinal sectional view of the knob-type writing instrument. DESCRIPTION OF SYMBOLS 1... Axis tube, 1a... Locking part, 2... Writing instrument cartridge, 2a... Locking part, 2b... Writing part,
3... Elastic repellent member, 4... Elastic repellent member, 5... Appearing and retracting mechanism.

Claims (1)

[Scope of utility model registration request] In a lock-type writing instrument with a built-in writing instrument cartridge in which the elastic member is extended and retracted by an appropriate retraction mechanism and the writing part can be moved in and out from the tip of the barrel, in addition to the elastic member that urges the writing instrument cartridge toward the rear of the barrel, An elastic member is disposed between the locking part provided on the inner wall of the cylinder and the locking part of the writing instrument cartridge provided in front of the locking part, which reduces the size only when the writing part is stored in the barrel. A characteristic notsuku type writing instrument.