JPS6017360Y2 - Cursive appearance device in writing instruments - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a writing instrument ejection and retraction device for a writing instrument that realizes the ejection and retraction operation of a writing instrument by engaging and disengaging a push member and a clip.

Conventionally, in this type of writing instrument, as shown in the fourth diagram, the engagement between the pushing member a and the clip b is such that the pushing member a presses toward the center of the barrel C, and the pushing member a pushes the clip b attached to the barrel C with the pushing force. Normally, this is done by sliding while pushing the shaft cylinder C outward against the pressure, and engaging the engaging part e provided on the pushing member a with the locking part d provided at a predetermined location on the clip b. Met.

Therefore, the actuation waves of the push member a caused by the frictional resistance between the push member a and the clip b cannot be avoided, and considerable consideration has been required to take measures to avoid this.

In view of this situation, the present invention is intended to realize a safe and reliable cursive writing device that guarantees smooth operation of the pushing member and has a simple structure.

The configuration of this proposal will be explained in detail below based on the drawings.

The clip 1 has a protruding portion 1 inserted into a hole 2a formed in the shaft tube 2.
a is pressed toward the center of the shaft cylinder and attached to the shaft cylinder 2. This is because the leaf spring 4 fixed between the inner cylinder 9 and the inclusion 3 in the shaft cylinder 2 presses the clip protrusion 1a. It's what happens when you press it.

Therefore, when the end portion 1b of the clip 1 is pressed toward the shaft cylinder, the protruding portion 1a swings upward about the fulcrum P against the elastic force of the leaf spring 4.

Reference numeral 5 denotes the bottom surface of the clip protrusion 1a, and a surface 6 extending from the terminal end thereof serves as a push member locking portion.

The bottom surface 5 of the clip protrusion may be either a flat surface or an inclined surface, but in consideration of engagement with the elastic member 8, which will be described later, it is preferably formed into an inclined surface.

Moreover, when the bottom surface 5 is formed into a slope, the slope is preferably formed to have a gentle slope toward the end.

This provides a smooth contact relationship with the elastic member 8 fixed to the push member 7, and also secures the engagement with the locking portion 6.
This is to ensure more safety and certainty.

The elastic member 8 is attached to a push member 7 that can freely move in the axial direction within the inner cylinder 9, and has a sliding portion 10 at its tip that moves while resiliently pressing against the bottom surface 5 of the clip protrusion, and this sliding portion. An engaging portion 11 of a push member is formed which is connected to the moving portion 10 and engages with a locking portion 6 provided on the clip, and the elastic force of this elastic member 8 is equal to the elastic force of the leaf spring 4. It is weaker.

As mentioned above, the sliding portion 10 is located on the bottom surface 5 of the clip protrusion.
Since it moves while bouncing, in order to obtain a smoother contact relationship between the two, it is preferable to form the shape in such a way that linear contact can be obtained when contacting with the bottom surface 5.

In addition, the locking part 6 provided on the clip and the engaging part 1 of the push member
Regarding shape 1, in order to make the engagement between the two more reliable and to increase the resistance to writing pressure in the writing state,
In FIG. 1, an extension surface from the terminal end of the clip bottom surface 5,
That is, it is preferable that the locking portion 6 is formed into a sloped surface or a vertical surface, and the engaging portion 11 of the push member is also formed into a similar sloped surface or a vertical surface.

Reference numeral 7b denotes a portion of the pushing member 7 exposed outside the shaft cylinder, and the pressing operation is performed by this portion.

Further, the pushing member 7 has an extension part 7a extending below the clip protrusion 1a toward the writing end 12a, and this extension part 7a
The tip contacts the cursive 12.

Since the writing body 12 is always pushed upward on the writing body 2 (in the direction opposite to the writing end 12a of the writing body) by the spring 13 attached to the tip of the writing body 2, this pressing force is transmitted to the pushing member 7. be done.

Now, in FIG. 1, when trying to obtain the writing state of the writing body 12, the exposed portion 7b of the pushing member is pressed.

Due to the pressing operation of the pushing member 7, the elastic member 8 attached to the pushing member 7 also moves together with the pushing member 7, and first, the sliding portion 1
0 slides in contact with the bottom surface 5 of the clip protrusion.

At this time, the sliding part 10 is pushed downward while sliding on the bottom surface 5, and when the sliding part 10 eventually passes the end of the bottom surface 5, the retaining part 11 of the pushing member provided on the elastic member 8 clips. It engages with the locking part 6 of.

Thus, by moving the pushing member extension 7a, the cursive 1
2 can also be moved by a predetermined amount to obtain a writing state (as shown in the second diagram)
.

In order to return the writing 12 to its original position, it is sufficient to press the end 1b of the clip as shown in FIG. 7 and the writing 12 return to their original positions due to the elastic force of the spring 13.

Here, we have described a writing instrument in which one cursive body is accommodated in one barrel, but it is also possible to use a writing instrument that accommodates a plurality of cursive bodies and includes a movable pendulum that follows gravity or other appropriate cursive body selection member. Of course, the present invention can also be used for multi-lead writing instruments.

As described above, the present invention forms a bottom surface on the protruding part of the clip that engages with the elastic member provided on the push member, and also makes the surface extending from the end of the bottom face stronger than the elastic force of the leaf spring that presses the protruding part of the clip. A sliding part of an elastic member having a weak elastic force slides on this bottom surface, and an engaging part connected to the sliding part engages with the locking part, When the member is pressed, only the elastic member attached to the push member is displaced and the clip remains in a fixed state, so the present invention provides a simple, safe and reliable writing device that guarantees smooth operation of the push member. It is possible to achieve this.

Furthermore, according to the present invention, when the push member is pressed as described above, only the elastic member attached to the push member is displaced and the clip may be in a fixed state. This has the advantage that smooth pressing operation of the pushing member can be expected even while gripping the shaft cylinder.

[Brief explanation of drawings]

FIG. 1 is a side sectional view illustrating the entire writing instrument equipped with the device of the present invention, FIG. 2 is a side sectional view illustrating the writing state in FIG. 1, and FIG. A sectional view FIG. 4 is a schematic explanatory diagram of a conventional example of the relationship structure between the clip and the push member. 1...Clip, 1a...Protrusion, 4
...Plate spring, 5...Bottom, 6...
...Locking part, 7...Pushing member, 7a...
...Extension part, 7b...Exposed part, 8...
Elastic member, 10...Sliding part, 11...
Engagement part.

Claims (1)

[Scope of utility model registration request] A clip 1 is attached to the clip 1, which is pressed toward the center of the barrel 2 by a plate spring 4 to prevent the writing from appearing and retracted, and is swingable about a fulcrum P; 2
In a writing device for a writing instrument that is activated by engaging and disengaging with a push member 7 attached by being pushed upward, a push member locking portion 6 is attached to an extension surface of a protruding portion 1a provided on a clip 1 from an end of a bottom surface 5. At the same time, the pushing member 7 is provided with an elastic member 8 having a sliding part 10 that moves by resiliently moving the bottom surface 5 of the clip protruding part 1a, and a pushing member engaging part 11 provided in connection with the sliding part 10. A writing device for a writing instrument, characterized in that the elastic member 8 has a resilient force weaker than the leaf spring 4.