JPH0415517Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to writing instruments such as sharp pencils and ballpoint pens, and in particular, the tip of the writing shaft body can be moved to the tip of the outer cylinder by pushing the knob and pushing the tip of the clip. This article relates to a writing instrument that can be taken out and put in more easily.

[Conventional technology]

This kind of conventional writing instrument, for example, a sharp pencil, has a writing shaft 3 inserted into an outer cylinder 2 having a clip 1 on the rear end side, as shown in FIG. 4, and by pushing the notch portion 4 against the retraction spring 5, the tip 6 of the writing shaft 3 is pushed out from the tip of the outer cylinder 2, and in this pushed-out state, the writing shaft 3 is 3
The tip of the locking piece 7 having a spring property provided on the clip 1 is locked to the rear end of the through hole 9 provided in the part of the outer tube 2 facing the tip side of the clip 1, and the protrusion 13 on the inner surface of the tip of the clip 1 is attached to this end. The writing shaft 3 is released by pushing it into the through hole 9 and bending the locking piece 7 inward.
The tip 6 of the writing shaft 3 can be retracted by the spring force of the retraction spring 5 until the locking protrusion 8 of the locking piece 7 locks with the rear end of the through hole 9.

[Problems to be solved by the invention] In the conventional writing instruments as mentioned above,
When putting it into a pocket such as a bag, it is not possible to release the writing shaft 3 and retract the tip 6 of the writing shaft 3 unless the tip of the clip 1 is pressed. There was a problem that it could not be pulled into.

[Means for solving problems]

In order to solve the above problems, the writing instrument of this invention
Clip 1 on the rear end as shown in Figures 1 and 5.
By inserting the writing shaft body 3 into the outer cylinder 2 which has a The tip 6 of the body 3 is pushed out from the tip of the outer cylinder 2, and the writing shaft 3 is held in this pushed-out state by using the locking protrusion 8 of the locking piece 7 having a spring property provided on the writing shaft 3 or the notch portion 4. hold it in place,
By pushing the protrusion on the inner surface of the tip of the clip 1 into the through hole 9 provided in the portion of the outer cylinder 2 facing the tip side of the clip 1 and bending the locking piece 7 inward, the writing shaft is closed. 3 is released, and the writing shaft 3 can be retracted by the spring force of the retraction spring 5 until the locking protrusion 8 of the locking piece 7 locks into the rear end 9a of the through hole 9. , the clip 1 is the first and second clips 1a, 1
b, which integrates the proximal end of the first clip 1a and the proximal end of the second clip 1b, and
The fitting hole 11 on the side of the protrusion on the inner surface of the tip of the clip 1a and the second
It has a double structure in which the tip inner surface protrusion 13b of the clip 1b is fitted, and the tip inner surface protrusion 13a of the first clip 1a communicates with the tip inner surface protrusion fitting hole 11, and the locking protrusion of the locking piece 7 is connected to the tip inner surface protrusion 13a of the first clip 1a. The structure includes an engagement hole 14 with which the portion 8 engages.

[Effect]

When the knob 4 is pushed in against the retraction spring 5, the writing shaft 3 is pushed and the tip 6 of the writing shaft 3 is pushed out from the tip of the outer cylinder 2. At this time, the locking projection 8 of the locking piece 7 provided on the writing shaft 3 is engaged with the engagement hole 14 formed in the tip inner surface projection 13a of the first clip 1a. The tip 6 of the outer tube 2 is held in a state where it is pushed out from the tip of the outer cylinder 2.

When retracting the tip 6 of the writing shaft 3, press the tip of the first clip 1b and press the tip inner surface projection 13b of the second clip 1b against the locking projection 8 of the locking piece 7. 7 is bent inward, and its locking protrusion 8 is disengaged from the engagement hole 14 formed in the tip inner protrusion 13a of the first clip 1a.

When the locking protrusion 8 of the locking piece 7 is disengaged from the engagement hole 14 of the first clip 1a, the writing shaft 3 is retracted by the spring force of the retraction spring 5, and the locking protrusion 8 of the locking piece 7 is released. It comes into contact with the rear end 9a of the through hole 9 of the cylinder 2 and is locked, and the tip 6 of the writing shaft 3 is in a retracted state.

Furthermore, when the writing instrument of the present invention is put into a pocket of a jacket, a bag, etc., the tip of the first clip 1a inevitably bends outward, and the engagement hole 14 of the first clip 1a and the engagement protrusion of the engagement piece 7 8 is naturally disengaged, the writing shaft 3 is retracted by the spring force of the retraction spring 5, and the tip 6 of the writing shaft 3 can be inevitably retracted.

〔Example〕

FIG. 1 is a longitudinal sectional view showing one embodiment of the writing instrument of the present invention, and shows an example of a sharp pencil. 2 is a longitudinal cross-sectional view of the inner cylinder, FIG. 3 is a front view of the clip portion, and FIG. 4 is a cross-sectional view taken along the line -- in FIG. 3.

First, the structure of this mechanical pencil will be explained.

In FIG. 1, reference numeral 2 denotes an outer cylinder, which has a clip 1 at its rear end. 3 is a writing shaft inserted into this outer cylinder 2. This writing shaft body 3 has a tip portion 1 on the tip side.
5a is attached with a screw, and comprises an inner cylinder 15 having a locking piece 7 having spring properties formed on the rear end side, and a lead feeding mechanism 17 with a lead tank 16 provided inside the inner cylinder 15.

The lead feeding mechanism 17 opens and closes the chuck 20 fitted to the chuck ring 19 by moving the lead tank 16 in the axial direction against the knock spring 18 or by the force of the spring.
Feed out the inner core by a predetermined length from the chuck 20,
The core is fed out by a predetermined length from the tip 6 of the tip 15a of the inner cylinder 15.

4 is a lead feeding mechanism 17 that constitutes the writing shaft body 3;
A notch 5 fitted into the lead tank 16 is a retraction spring that restricts the writing shaft 3 toward the rear of the outer cylinder 2.

A through hole 9 is provided in a portion of the outer tube 2 facing the tip end side of the clip 1, and a locking protrusion 8 of a locking piece 7 is loosely fitted therein so as to be movable in the axial direction.

The clip 1 consists of first and second clips 1a and 2b, and the base end 12a of the first clip 1a is integrally provided on the outer periphery of the rear end of the outer cylinder 2. A second clip 1b is attached to the proximal end side fitting part (hole) 10 of the first clip 1a and the distal end inner protrusion side fitting hole 11, respectively.
The proximal end 12b and the inner protrusion 13b of the distal end are fitted together to form a double structure. Reference numeral 21 denotes a retaining protrusion formed on the outer periphery of the base end 12b of the second clip 1b.

The tip inner surface protrusion 13a of the first clip 1a has a
An engagement hole 14 is provided which communicates with the front end inner surface projection side fitting hole 11 and into which the locking protrusion 8 of the locking piece 7 engages.

Next, the operation of this sharpening pencil will be explained.

When the knob 4 is pushed in against the retraction spring 5, the writing shaft 3 is pushed and the tip 6 of the writing shaft 3 is pushed out from the tip of the outer cylinder 2. At this time, the locking projection 8 of the locking piece 7 provided on the writing shaft 3 is engaged with the engagement hole 14 formed in the tip inner surface projection 13a of the first clip 1a. The tip 6 of the outer tube 2 is held in a state where it is pushed out from the tip of the outer cylinder 2.

When writing, when the notching operation of the notching part 4 is performed in this state, the lead tank 16 is moved by the notching spring 18.
The chuck 20 moves in the axial direction against or by the spring force and is fitted into the chuck ring 19.
opens and closes to feed out the lead in the lead tank 16 by a predetermined length from the chuck 20, allowing the lead to be taken out from the tip 6 of the writing shaft body 3.

When retracting the lead, the chuck 20 will be in an open state by keeping the notched part 4 in the locked state, so that the lead can be retracted by pushing the tip of the lead.

When retracting the tip 6 of the writing shaft 3, press the tip of the second clip 1b and press the tip inner protrusion 13b of the second clip 1b against the locking protrusion 8 of the locking piece 7, and the locking piece 7 is bent inward, and its locking protrusion 8 is disengaged from the engagement hole 14 formed in the tip inner protrusion 13a of the first clip 1a.

When the locking protrusion 8 of the locking piece 7 is disengaged from the engagement hole 14 of the first clip 1a, the writing shaft 3 is retracted by the spring force of the retraction spring 5, and the locking protrusion 8 of the locking piece 7 is released. It comes into contact with the rear end 9a of the through hole 9 of the cylinder 2 and is locked, and the tip 6 of the writing shaft 3 is in a retracted state.

Furthermore, when the sharp pencil of the present invention is put into a pocket of a jacket, bag, etc., the tip of the first clip 1a inevitably bends outward, causing the engagement hole 14 of the first clip 1a and the engagement protrusion of the engagement piece 7 to Since the portion 8 is naturally disengaged, the writing shaft 3 is retracted by the spring force of the retraction spring 5, and the tip 6 of the writing shaft 3 can be inevitably retracted.

Also, when putting the sharp pencil in your pocket, if there is no risk of the tip 6 of the writing shaft 3 getting caught on the inner surface of the pocket, hold the knob 4 and push the first and second clips 1a and 1b out of the pocket. If you insert it into your pocket from the tip side as shown,
Since the engagement between the tip inner surface protrusion 13a of the first clip 1a and the locking protrusion 8 of the locking piece 7 is forcibly released by the edge of the pocket, the writing shaft 3
can necessarily be retracted.

FIG. 5 is a longitudinal sectional view showing another embodiment of the writing instrument of the present invention, showing an example of a ballpoint pen. Fig. 6 is a front view of the notch, and Fig. 7 is a - of Fig. 6.
FIG.

In the case of this ballpoint pen, the writing shaft 3 is a refill. A ball 2 is attached to the tip 6 of this writing shaft body 3.
2 is held rotatably, and ink is stored in the writing shaft 3.

The notch part 4 fitted to the rear end of the writing shaft 3 is provided with an extension tube 23 that covers the writing shaft 3, and the extension tube 23 has a spring property so that the tip thereof is on the side of the notch part 4. A locking piece 7 is formed, and the other features are the same as the above-mentioned sharp pencil.

According to this ballpoint pen, when the knob 4 is pushed in against the retraction spring 5, the writing shaft 3 is pushed and the tip 6 of the writing shaft 3 is pushed out from the tip of the outer cylinder 2. At this time, the extension tube 23 of the notch portion 4
The locking protrusion 8 of the locking piece 7 formed in the engagement hole 14 formed in the tip inner surface protrusion 13a of the first clip 1a
As a result, the tip 6 of the writing shaft 3 is held in a state pushed out from the tip of the outer cylinder 2. You can write in this state.

The operations when retracting the tip 6 of the writing shaft 3 and when putting this ballpoint pen into a pocket are exactly the same as those for the above-mentioned sharp pencil.

Further, the clip 1 in the present invention may have the structure shown in FIG.

That is, a proximal side fitting part (notch 10) is provided at the proximal end 12a of the first clip 1a, and a retaining protrusion 21 is formed on the inner periphery of this notch 10. A fitting hole 11 on the inner surface protrusion side is provided on the inner surface protrusion side (see FIG. 9).

A base end 12a of the first clip 1a is integrally provided on the outer periphery of the rear end of the outer cylinder 2. 2nd clip 1
The proximal end portion 12b and the distal inner protrusion 13b of the first clip 1a are fitted with the proximal end side engaging portion 10 and the distal inner protrusion side fitting hole 11 of the first clip 1a, respectively, resulting in a double structure. . This fitting is facilitated if the second clip 1b is bent outward.

It is noted that the distal end inner protrusion 13a of the first clip 1a is provided with an engagement hole 14 that communicates with the distal inner protrusion side fitting hole 11 and engages with the locking protrusion 8 of the locking piece 7. Not until now. In the above embodiment, the base end portion of the first clip 1a and the base end portion of the second clip 1b are integrated by fitting together.
The base end portions of the first and second clips 1a, 1b may be made integral by molding.

Further, the first and second clips 1a and 1b may be made of metal, plastic, or wood,
Further, it may be of the same or different quality as the outer cylinder 2. If they are of the same quality, they may be integrally molded with the outer cylinder 2, or they may be fixed to the outer cylinder 2 by an appropriate means, and if they are of different qualities, they may be fixed to the outer cylinder 2 by an appropriate means.

[Effect of idea]

As is clear from the above description, according to the present invention, the clip 1 includes the first and second clips 1a and 1b.
The proximal end of the first clip 1a and the proximal end of the second clip 1b are integrated, and the fitting hole 11 on the side of the inner protrusion of the distal end of the first clip 1a and the inner protrusion of the distal end of the second clip 1b are integrated. It has a double structure in which the portions 13b are fitted together, and the locking protrusion 8 of the locking piece 7 is engaged with the distal inner protrusion 13a of the first clip 1a which communicates with the distal inner protrusion side fitting hole 11. Engagement hole 14
By pressing the tip of the second clip 1b, the locking protrusion 8 of the locking piece 7 is attached to the first clip 1b.
The spring 5 is released from the engagement hole 14 formed in the inner protrusion 13a of the tip of the writing shaft 3, and the tip 6 of the writing shaft 3 is pulled in.
Not only can it be retracted by the spring force, but when the writing instrument of the present invention is put into a pocket of a jacket, a bag, etc., the tip of the first clip 1a inevitably bends outward, and the engagement hole 14 of the first clip 1a inevitably bends outward. Since the engagement between the locking protrusion 8 of the locking piece 7 and the locking piece 7 is naturally released,
The tip 6 of the writing shaft 3 can be naturally retracted by the spring force of the retraction spring 5.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing one embodiment of the writing instrument of the present invention, Fig. 2 is a longitudinal sectional view of the inner cylinder thereof, Fig. 3 is a front view of the clip portion, and Fig. 4 is the same as that shown in Fig. 3. 5 is a longitudinal sectional view showing another embodiment of the writing instrument of the present invention, FIG. 6 is a front view of the notch portion thereof, and FIG. 7 is a sectional view taken along the line -- of FIG. 6.
Fig. 8 is a perspective view showing another example of the clip according to the present invention, Fig. 9 is a plan view of the first clip constituting the clip shown in Fig. 8, and Fig. 10 is a longitudinal sectional view showing an example of a conventional writing instrument. It is. 1... Clip, 1a... First clip, 1b
... Second clip, 2 ... Outer cylinder, 3 ... Writing shaft, 4 ... Knot part, 5 ... Retraction spring, 6 ...
Tip, 7... Locking piece, 8... Locking protrusion, 9... Through hole, 9a... Rear end, 10... Base end side fitting hole (hole, cut), 11... Tip inner surface Projection side engagement hole, 12a, 12b... base end, 13a, 13b
... Tip inner protrusion, 14 ... Engagement hole.

Claims (1)

[Claims for Utility Model Registration] A writing shaft 3 is inserted into an outer cylinder 2 having a clip 1, a notch 4 is fitted to the rear end of the writing shaft 3, and a retracting spring 5 is inserted into the notch 4. By pushing against the pressure, the tip of the writing shaft 3 is pushed out from the tip 6 of the outer cylinder 2, and in this pushed-out state, the writing shaft 3 is attached to the writing shaft 3 or the locking piece having a spring property provided on the notch portion 4. The locking piece 7 is held by using the locking protrusion 8 of the clip 1, and the locking piece 7 is held by pushing the inner protrusion of the clip 1 into the through hole 9 provided in the part of the outer cylinder 2 facing the clip 1. The writing shaft 3 is released by bending inward, and the writing shaft 3 is held until the locking protrusion 8 of the locking piece 7 locks with the rear end 9a of the through hole 9 due to the spring force of the retraction spring 5. In the writing instrument in which the clip 3 can be retracted, the clip 1 has first and second clips 1a, 1
b, which fixes the proximal end of the first clip 1a and the proximal end of the second clip 1b, and also connects the inner protrusion side fitting hole 11 of the first clip 1a and the inner protrusion 13b of the second clip 1b. This writing instrument has a double structure in which the first clip 1a is fitted with an engaging hole 14 in which the locking protrusion 8 of the locking piece 7 engages with the inner surface protrusion 13a of the first clip 1a.