KR910005294Y1 - Sharp pencil - Google Patents

Abstract

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Description

Shaft Tip Serving Mechanism

1 is a longitudinal sectional view showing one embodiment of the appearance device according to the present invention.

2 is a partially exploded perspective view of FIG.

3 is a partial perspective view of FIG.

4a to c are cross-sectional views showing various embodiments of the cam mechanism coupled with the shaft according to the present invention.

5a, b is a longitudinal sectional view of the main part showing the protruding state and the attracted state of the clip, which is the appearance device according to the present invention, respectively.

Figure 6 is a longitudinal sectional view showing another embodiment of the shaft in the appearance mechanism according to the present invention.

Figure 7 is a longitudinal cross-sectional view showing another embodiment of the shaft in the appearance mechanism according to the present invention.

8 is a perspective view of the lead chuck.

* Explanation of symbols for main parts of the drawings

1: outer cylinder 2: long hole

3: clip 4: shaft

5: Tip cap 6: Spring

7: Tip 8: Cam Mechanism

9: base 10a, 10b: hook

13: latching portion 13a: fitting portion

14: back slope 15: moving part

16: projection 18a, 18b, 18c: fitting hole

The present invention relates to a retrieval mechanism for retracting the distal end of a shaft, such as writing instruments such as ballpoint pens and pencils, cosmetics such as cutters, eyeliners, and crayons. The present invention relates to a shaft tip projection mechanism such that the clip is drawn when the clip is used and the clip protrudes when being carried.

Some conventional writing instruments have a clip fixed to the back of the outer cylinder. Since the fixed clips protrude from the outer cylinder, the writing instruments are rotated as in the drawing, and the same thickness lines and characters are used. The drawback was that the clip became cumbersome when drawing on the back.

In addition, the conventional one is attached to the base of the clip to be detachable to the outer cylinder to remove the clip when writing and attach the clip when carrying, this is a so-called detachable method of detaching the clip from the outer cylinder when writing Since the problem of being cumbersome when taking notes is solved, there are drawbacks such as not only annoying but also a scratch on the outer tube when the writing and carrying are required to attach and detach the clip.

The present invention has been devised to solve the above drawbacks, and when using it, the clip enters and at the same time the tip of the shaft protrudes from the outer cylinder. When carrying, the tip of the shaft protrudes and the tip of the shaft into the outer cylinder. It is an object of the present invention to provide a shaft dispensing mechanism that is intended to be attracted.

In order to achieve the above object, the present invention, the shaft tip part retracting mechanism has a long hole (2) formed in the outer cylinder (1) as shown in FIGS. It is fitted so as to float freely, and in the outer cylinder 1, a spring 6 for pushing the cam mechanism 8 to the rear, and against the spring 6 or against the spring force of the spring 6 Thereby, the cam mechanism 8 which makes the tip part 7 of the shaft body 4 stand out correspondingly to the gripping operation of the clip 3 is provided.

And this cam mechanism 8 is in front of the base 9 of the clip 3. The front of the long hole (2) of the outer cylinder (1) to the rear. The front fits into the back. Rear catches (10a, 10b) and the front. At the rear of the front inclined surface 12 and the front inclined surface 12, the engaging hole 11 formed between the rear engaging portions 10a and 10b and the front engaging portion 10a are lowered as the front engaging portion 10a slides and moves backward. It is formed of a moving portion 15 having a locking portion 13 is formed to catch the front locking portion (10a) and the rear inclined surface 14 to be lowered by being caught in the locking hole 11 to move in the rearward direction. The shaft 4 is in contact with, coupled to or integrally formed.

In the present devised and output mechanism configured as described above, when the front of the clip 3 is pressed during use, the cam mechanism 8 is operated so that the tip portion 7 of the shaft 4 faces the spring 6 from the outer cylinder 1. The protruding portion 7 of the shaft 4 maintains the protruding state while being protruded.

On the other hand, when carrying or pulling the front end portion 7 of the shaft 4, pressing the back of the clip 3, the seesaw mechanism is operated to release the fastening state of the front catching portion 10a and the cam mechanism 8 Is released to release the clip 3, so that the clip 3 protrudes and the tip 7 of the shaft 4 moves into the outer cylinder 1 by the spring force of the spring 6. It is attracted.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a longitudinal sectional view showing the configuration of one embodiment of the present invention appearance mechanism, FIG. 2 is a partially exploded perspective view of FIG. 1, and FIG. 3 is a partial perspective view of FIG. Reference numeral 1 denotes an outer cylinder, and 2 denotes a long hole axially drilled into the rear portion of the outer cylinder 1. The long hole 2 is fitted with a clip 3 so that it can freely float, and a spring 6 between the spring support 17 and the tip cap 5 of the writing member 4 for the ballpoint pen, for example, the shaft 4. ) Is inserted. Further, reference numeral 8 denotes a cam mechanism which projects the pen tip 7 of the shaft 4 in response to the spring 6 or in response to the retracting operation of the clip 3 in response to the spring force. ) And the clip (3).

And this cam mechanism 8 is in front of the base 9 of the clip 3. In front of the long hole (2) of the outer cylinder (1). Front and back side gaps (10a, 10b) that fit into the back and their front. In addition, the base 9 is formed at the center in the lateral direction with the engaging hole 11 formed between the rear catching portions 10a and 10b, and the front catching portion 10a is lowered as it slides toward the rear. It is installed on the inclined surface 12 and the rear portion of the front inclined surface 12, the engaging portion 13 to which the front locking portion 10a is caught, and the rear side that is lowered as it is engaged with the locking hole 11 In the front part of the moving part 15 provided with the inclined surface 14 and the projection 16 formed in the back side of this rear inclined surface 14, a fitting hole so as to cope with two kinds of shaft bodies 4 with different outer diameters ( 18a, 18b (see FIGS. 1 and 4b) are formed so that the rear portion of the shaft 4 is fitted into one of the fitting holes 18a.

According to the present invention device having the above-described configuration, when the front side of the clip 3 is pressed when using the writing instrument, the front locking portion 10a and the locking hole 11 formed on the base 9 of the clip 3 are respectively. The front inclined surface 12 and the rear inclined surface 14 are pressed to move the moving part 15 and the ballpoint pen writing member 4 forwardly against the spring 6, and according to this movement, the pen tip of the shaft 4 is moved. (7) will protrude from the tip cap (5). At this time, the front catching portion 10a passes through the front inclined surface 12 and enters the fitting portion 13a to be caught by the catching portion 13 to maintain a state in which the clip 3 is drawn. (See also figure 5b)

In addition, when carrying or pulling the pen tip 7 of the ball-point pen writing member 4, when the rear portion of the clip 3 is pressed, the base 9 of the clip 3 is formed on the side of the rear side of the rear inclined surface 14. The front catching portion 10a is detached from the fitting portion 13a by being levered with the projection 16 as a support point, and is peeled off from the catching portion 13 to be in sliding contact with the front inclined surface 12 (figure 5b of FIG. 5B). In addition, when the locking hole 11 is pressed against the rear inclined surface 14 and the moving part 15 is moved forward slightly against the spring 6, the ball pen writing is performed by the spring force of the spring 6. The member 4 and the moving part 15 are moved backwards, and the clip 3 protrudes according to this movement. (See Figure 5a)

In this case, when the projection 16 is formed on the side of the rear side of the rear inclined surface 14, when the rear portion of the clip 3 is pressed, the base 9 of the clip 3 comes into contact with the front side of the projection 16. It is preferable because the state in which the locking portion 10a and the locking portion 13 of the fitting portion 13a are engaged can be smoothly released by the lever principle. The projections 16 may be formed on the side of the rear portion of the rear inclined surface 14, but may be formed on the lower surface of the base 9 of the clip 13 as shown in FIG. The rear portion may be formed at a portion opposite to the outer cylinder (1), so that it may be formed in at least one of several places.

Moreover, the front part of the moving part 15 of the cam mechanism 8 engaged with the said shaft 4 is fitted so that it can cope with two types of shafts of which outer diameter differs, as shown in FIG. 1 and FIG. 4B. Since the holes 18a and 18b are formed, one fitting hole 18b is used when the outer diameter of the shaft 4 to be used is large, and the other fitting hole 18a when the outer diameter of the shaft 4 is small. Each shaft can be selected to engage the shaft in the fitting hole, so that the shaft can cope with another shaft.

FIG. 4A illustrates a case in which two fitting holes 18a and 18b having different inner diameters are eccentrically formed in the moving part 15, while FIG. 4B illustrates two fitting holes 18a and 18b having different diameters concentrically. In this case, the third c diagram also shows an example in which three fitting holes 18a, 18b, and 18c having different diameters are formed concentrically, and two types of large and small outer diameters are shown. It is able to cope with three kinds of shafts or large, medium and small.

Here, the number of the fitting holes 18a, 18B, ... is not limited to two or three but may be more.

According to this embodiment, when in use (i.e., when writing), the front of the clip 3 is pressed to actuate the cam mechanism 8 against the spring 6 to attract the clip 3 and at the same time for the ballpoint pen. The pen tip 7 of the writing shaft 4 can protrude from the tip cap 5 of the outer cylinder 1, and thus the state in which the clip 3 is drawn and the pen tip of the writing shaft 4 protrude out. This allows not only the clip 3 to be written without becoming cumbersome, but also to carry or to draw the pen tip 7 of the writing shaft 4 by pressing the back portion of the clip 3 onto the spring 6. The cam mechanism 8 is actuated by the repulsive force to release the clip 3 from being retracted to protrude the clip 3 and at the same time, the pen tip 7 of the writing shaft 4 is distal to the tip of the outer cylinder 1. Since the cap 5 can be pulled into the cap 5, the clip 3 can be inserted into a pocket or the like to be carried.

In addition, since the configuration of the present embodiment can be composed of two parts (both plastic molded parts) of the clip 3 and the moving part 15, the number of parts is reduced compared to the use of the conventional rotating cam mechanism. It becomes possible.

In addition, fitting holes 18a, 18b, ... are formed in the front portion of the moving part 15 of the cam mechanism 8 engaged with the shaft pen 4 so as to cope with several shaft bodies 4 having different outer diameters. The fitting hole can be selected and fitted to the fitting hole corresponding to the outer diameter of the shaft 4, so that it is possible to cope with the use of a plurality of shafts having different outer diameters without increasing the number of parts.

Since the upper shaft body 4 is always pushed backward by the spring 6, the upper shaft 4 is directly in contact with the end face of the moving part 15 without forming fitting holes 18a, 18b, ... in the moving part 15. The shaft 4 and the moving part 15 may be integrally formed.

On the other hand, if the projection 16 is formed in at least one of the rear portion of the cam mechanism 8, that is, the portion facing the outer cylinder 1 and the lower surface of the clip 3 at the rear portion of the cam mechanism 8, It is possible to smoothly and reliably perform the appearance operation of (3). If the cam portion 8 is provided with a fitting portion 13a into which the front locking portion 10a is fitted, the protruding state of the tip portion 7 of the shaft 4 can be more surely maintained. On the clip 3. Since the stroke in the downward direction can be increased, the operability can be improved.

Moreover, as shown by the virtual line in FIG. 1, the base part 9 of the clip 3 of the top part of the back inclined surface 14 of the cam mechanism 8 engaged with the engaging hole 11 of the clip 3 is shown. The lower surface of the cam mechanism 8 is formed to be somewhat lower than the lower surface of the cam mechanism 8, that is, the projection preventing portion 15a is formed on the outer surface of the front portion of the moving part 15. In addition to forming (15b), if the release preventing projection 1a is formed on the inner surface of the rear portion of the outer cylinder 1, the tip cap 5 is peeled off and the spring 6 and the ball pen shaft 4 are turned off. When picking up, the separation preventing protrusion 15a of the moving part 15 touches the separation preventing protrusion 1a formed on the inner surface of the outer cylinder 1 so that the cam mechanism 8 can be prevented from escaping from the outer cylinder 1. Will be.

On the other hand, when assembling the cam mechanism 8, the cam mechanism 8 is inserted from the front end side of the outer cylinder 1, and the projection 15a for preventing the detachment of the moving part 15 is used to take the slit 15b for bending. It may be assembled so that the clip 3 is fitted to the long hole 2 so as to ride over the separation preventing projection (1a) formed on the inner surface of the outer cylinder (1).

FIG. 6 is a longitudinal sectional view showing another embodiment of the shaft in the apparatus for inventing the present invention, which is the case of the writing shaft body for a pencil, and the writing shaft body 4 for the pencil according to the present applicant has been proposed by Japan. The mechanical pencil of National Utility Model Registration Application No. 62-77145 can be applied.

The mechanical pencil is fitted with a sleeve 21 which is engaged to be slid freely in the tip cap 20 of the outer cylinder 19 and the sleeve 21 is inserted into the sleeve 21 to allow for advancement of the pen core 22. The slider 25 having a friction sending member 23 for preventing the retraction is arranged to slide in the tip cam 20 and to impart a predetermined friction force to the pen core 22 therein. When the slider 25 is pushed forward to stop writing, the spring 26 is advanced to advance the slider 25 so that the pen core 22 is automatically discharged, and is provided at the rear of the outer cylinder 19. It is made of a lead core introduction pipe 27 for introducing and guiding one lead core 22 from the outside into the pen core sending mechanism 23.

In such a sharp pencil, when the pen core 22 having a length substantially equal to the overall length of the sharp pencil is inserted from the rear end hole 17a of the pen lead pipe 27, the tip of the slide pipe 30 is approximately the same. Since the pen core 22 reaches the position, and writing in this state, as the pen core 22 gradually wears out, the slide pipe 30 retreats, so that the writing can be continued as it is. However, when writing is stopped and the front end of the slide pipe 30 is removed from the ground, the slider 25 is advanced by the spring force of the spring 26 and the lead 22 is also removed from the friction imparting member 24. It is pulled in the forward direction together with the slider 25 with a predetermined frictional force. In addition, since the lead chuck 28 also holds the lead core 22, the lead chuck 28 is reduced with the lead core 22. Thus, as the lead chuck 28 is advanced, the bowl 31 of the head portion of the metal barrel 32 has an inner surface. Since the taper wall 33 is in rolling contact with the tapered wall 33, the force of the lead chuck 28 to bite the lead is gradually weakened, so that the lead 22 is automatically discharged.

As described above, the spring holder 17 is provided on the outer surface of the outer cylinder 19 of the mechanical pencil to form the writing shaft 4 for the mechanical pencil, and the writing shaft 4 for the mechanical pencil is shown in FIG. If it is assembled instead of the ballpoint pen writing shaft body 4, it becomes possible to provide the appearance mechanism of the tip of the writing shaft body for a pencil pencil.

7 is a longitudinal sectional view of another embodiment of the shaft of the present invention, which shows another embodiment of the writing shaft for the SHARPS. Reference numeral 34 in FIG. 7 denotes a sleeve connecting the tip cap 20 and the outer cylinder 19. A metal barrel 32 having a tapered wall 33 is fitted in the inner staircase. It may be formed integrally with the sleeve 34. Reference numeral 35 denotes a lead chuck which is divided into two in the axial direction, and the lead chuck 35 is provided with a projection 36 which is in sliding contact with the tapered wall 33 of the metal barrel 32 (eighth). See also).

Here, the components denoted by the same reference numerals as those in FIG. 6 have the same functions, and the operation can be described in the same manner as in FIG.

That is, if the lead core 22 is written in the same state as the front end of the slide pipe 30, as the lead core 22 is consumed, the slide pipe 30 retreats, so that writing can be continued as it is. When stopped and the front of the slide pipe 30 is removed from the ground, the slide 25 is advanced by the spring force of the spring 26 and the double core 22 also has a predetermined friction force from the friction imparting member 24. As the slide 25 is pulled in the forward direction. In addition, since the lead chuck 35 and the lead core 22 are held together, the lead core 22 moves forward together. When the lead chuck 35 moves forward, the protrusion 36 tapers the inner surface of the metal cylinder 32. Since the sliding of the wall 33, the force of the glide chuck 35 bites the pen core is gradually weakened so that the discharge of the pen core 22 is automatically made. This embodiment has a simpler configuration than that shown in Fig. 6, so that a reduction in manufacturing cost can be realized.

In addition, the front end of the sleeve 34 of such a pencil pencil as a spring support 17 constitutes a writing pencil body 4 for the pencil pencil, and the writing shaft body 4 for the ball-point pen shown in FIG. If assembled instead, it is possible to provide a mechanism for dispensing the writing shaft tip for the pencil pencil.

On the other hand, the present embodiment has been described in the case of the writing shaft body 4 for a ballpoint pen and the writing shaft body 4 for a mechanical pencil, but of course, the same applies to the shaft body of the cutter.

Although FIG. 6 is an embodiment using the bowl 31, as shown in FIGS. 7 and 8, a protrusion 36 in sliding contact with the outer surface of the lead chuck 35 may be formed instead of the bowl.

Moreover, in this invention, the shaft 4 and the moving part 15 may be integrated, and may be separate, and may be combined by placing an adapter between them.

As described above, according to the present invention, a long hole 2 is formed in the outer cylinder 1 so that the clip 3 can be freely mounted on the long hole 2, and a cam is inserted into the outer cylinder 1. A spring 6 for pushing the mechanism 8 backwards, and the tip 7 of the shaft 4 in response to the spring 3 operation against the spring 6 or by the elastic force thereof A cam mechanism 8 is mounted to be set out, and this cam mechanism 8 is provided in front of the clip 9 and the revolving portion 9. In front of the long hole (2) of the outer cylinder (1). A locking hole 11 is formed between the front and rear locking portions 10a and 10b and the front and rear locking portions 10a and 10b that are engaged with the rear portion, and the front locking portion 10a is in sliding contact with the rear side. When moved to the front inclined surface 12 is lowered, formed on the rear portion of the front inclined surface 12 is engaged with the engaging portion 13 and the engaging hole 11 is caught by the front locking portion 10a As the shaft 4 is brought into contact with, coupled to or integrally formed with the moving part 15 having the rear inclined surface 14 as it moves backward, the spring 6 is pushed by the clip 3 when in use. The cam mechanism 8 can be operated against to attract the clip 3, and at the same time, the tip portion 7 of the shaft 4 can be protruded from the outer cylinder 1, and thus the state in which the clip 3 is drawn and the shaft As the tip portion 78 of the 4 is protruded, the clip 3 does not interfere with writing and the line of the shaft 4 does not interfere with writing. When the end 7 can be used, and when carrying or pulling the front end 7 of the shaft 4, the cam mechanism 8 is operated by pressing the clip 3 with the spring force of the spring 6 so that the clip ( When 3) is released, the clip 3 protrudes and the tip 7 of the shaft 4 can be drawn into the outer cylinder 1, so that the clip 3 is inserted into a pocket or the like. I can carry it.

In addition, since the cam mechanism 98 is immediately moved by the indentation operation of the clip 3, the incidence of the tip of the shaft 4 can be smoothly, quickly and reliably made, and the tip of the shaft 4 is attracted. It is forgotten that it is plugged into a pocket or the like, so that the pocket or the like is not stained or damaged by the tip of the shaft 4.

In addition, since the device of the present invention can be composed of two parts of the clip 3 and the moving part 15, the number of parts can be reduced compared to using a conventional rotating cam mechanism, so that it can be manufactured at a low price.

Claims (2)

In the outer cylinder (1) formed with the long hole (2) to be mounted so that the clip (3) can freely float, the front and back to be caught on the front and back of the long hole (2) on the front and back of the base (9) of the clip (3) The front inclined surface portion which lowers downward when the locking hole 11 formed between the locking portions 10a and 10b and the front and rear locking portions 10a and 10b and the front locking portion 10a slides back to move downward. 12) is formed in the rear portion of the front inclined surface portion 12 to be engaged with the engaging portion 13 and the engaging hole 11, the front locking portion (10a) is caught, the rear side to be lowered when moving backward The cam mechanism 8 made up of the inclined surface portion moving portion 15 is provided, and the cam body 8 of the cam mechanism 8 is mounted on the shaft tip end appearance mechanism of the writing instrument such that the shaft 4 is coupled to the front portion of the moving portion 15. In this case, the front locking portion 10a of the base 9 of the clip 3 is inserted directly behind the locking portion 13 of the moving portion 15. The fitting portion 13a is formed, and the fitting means in which the shaft 4 is coupled to the front portion of the moving part 15 to cope with the shaft 4 having different diameters (stepping holes having a multi-stage step shape ( 18a, 18b, ...) shaft tip end appearance mechanism characterized in that consisting of. 2. A shaft tip mounting mechanism according to claim 1, wherein a protrusion (16) is formed on a lower surface of the base (9) of the clip (3).