KR830002396Y1 - Writing tools - Google Patents

Abstract

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Description

Writing tools

Figure 1a is an exploded perspective view of a first embodiment according to the present invention.

Figure 1b is a perspective view of the lower part of the inner tube of the first embodiment according to the present invention.

1C is a perspective view of the lower portion of the inner tube with one of the clamp halves removed to show the interior of the lower portion of the inner tube.

2-6 is a cross-sectional view of the first embodiment of the present invention showing various step courts for discharging the pencil lead.

7-10 are cross-sectional views of a first embodiment of the present invention showing various step courts for retracting a pencil lead.

11 is an exploded perspective view of a second embodiment according to the present invention.

12 is a sectional view of a second embodiment according to the present invention.

12a is a cross-sectional view of a second embodiment of the present invention in which a pencil core is discharged.

13 is a sectional view of a first embodiment of a cartridge according to the present invention.

14 and 15 are schematic views of a first embodiment of a cartridge according to the present invention, showing a manner of feeding a new pencil lead into an empty inner tube.

16 is a sectional view of a second embodiment of a cartridge according to the present invention.

The present invention relates to a writing implement, and a pencil lead can be automatically loaded, the pencil lead is sharpened in advance and does not need to sharpen the sharpening of the pencil for writing and drawing.

″ Presharpened ″ pencils are available on the market, and so many pencils are sold. However, they found that the structure of the two pencils was not only very complicated but also had many disadvantages.

Therefore, the main purpose of the present invention is to provide such a pencil of a special structure in order to not only eliminate the disadvantages of the pre-sharpened pencil but also to facilitate writing.

Advantageous features of the present invention are as follows.

(1) The present invention adopts a method in which a user can perform a one-handed operation in quickly loading a pencil lead for writing. The convenience and simplicity of this operation has not been exploited so far, and the presharpened pencil as described above never had such a desirable feature.

(2) In use, the core of this pencil is firmly pressed against the lower end of the pencil, so there is no shaking or vibration and thus provides a very stable operation.

(3) When loading or recharging the pencil lead to this pencil, the user's finger will not come in contact with the somewhat harmful pencil lead. This is one of the most significant advantages of the present invention, which prevents the user's fingers from getting dirty and is beneficial to the user's health.

(4) In the present invention, the pencil core holder or color is not required in the core portion, so that the manufacturing is easy and inexpensive.

(5) The present invention can withdraw the discharged pencil lead into the pencil, so that no other cap is needed to cover or protect the lead.

(6) Since the structure of the present invention is particularly simple, parts can be easily manufactured without assembly by injection molding. The cost is significantly reduced because of the simplicity of the manufacturing process.

In addition to the above, other objects, validities, and features of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in Figure 1a, the writing implement of the first embodiment of the present invention is composed of the outer casing 10, the coil spring 30, the inner tube 20, the lid member 40. The outer casing 10 is made of a hollow round tube by a pipe drawing extrusion method, and two ends 13 and 14 are inclined in a conical shape. Appropriate openings 12 and 16 are formed at each end, each of which has a diameter smaller than that of the casing 10. Two grooves 11-11 (the purpose of which will be described later) are formed near the top of the inclined end 13. The openings 15 (the purpose of which is also below the grooves 11-11) A channel 21 is formed inside the inner tube 20, and a plurality of pencil shims 50 (FIG. 2) are stored in the channel.

The lower tube channel 22 (FIG. 1c) of a slightly small diameter is formed in the lowest end part of the channel 21. As shown in FIG. The smaller diameter of the lower tube channel 22 is to prevent the lowermost of the pencil cores 50 from passing therein, so that the pencil cores 50 are retained in the inner tube 20.

A new pencil lead is fed into the inner tube 20 through the slightly larger diameter top end of the tube channel 21. The outermost end of the inner tube 20 extends to form a conical head 24, which head 24 is inclined inward to the longitudinal axis of the inner tube 20 to form a clamp 27 (FIG. 1b). do. Two slots (25, 26) are formed in the right head (24) to form two clamp halves, i.e., bisect the enlarged conical head (24) into two semi-circular seam clamps (27). . The slot 26 formed in the enlarged conical head 24 is short and the other slot 25 formed on the head 24 is very long.

The slot 26 is about 1/2 of the length of the pencil lead and the length of the lead is about 1 cm. Slot 25 is about 4-6 times the length of slot 26.

At the closed end of the slot 25, an inclined bottom wall 251 is formed to facilitate slipping of the hook-shaped tip 34 of the coil spring 30. In addition, two projections 28 are provided on the outer surface of the tube 20 at a distance of about 1/3 to about 1/2 of the length of the tube 20 from the conical clamp 27 (FIG. 1a). have. The position of the protrusion 28 can vary depending on the compressive strength of the coil spring 30 and the length of the coil spring.

The protrusions 28 are composed of two adjacent protrusions of different heights. The small protrusions are located toward the writing end of the pencil. This protrusion is for engaging the upper end of the spring so that the coil spring does not slip out of the inner tube 20 during assembly.

The protrusion 28 is for the inner tube 20 to press the spring. Two projections 29-29 are formed near the upper end of the inner tube 20 and pressed against the inner surface of the upper end 14 of the outer casing 10. The protrusions 29-29 are located about 1 cm from the top of the tube 20.

It is important that the lower end of the coil spring 30 constitutes a pencil core pressing member composed of a straight portion 33 and a hook-shaped tip portion 34 that is bent outwardly, that is, away from the inner portion of the tube 20. The length of the hook tip 34 is larger than the outer diameter of the trailing blunt end of the pencil lead. When inserting the inner tube 20 through the coil spring 30 into the outer casing 10, be careful that the pencil core pressing straight portion 33 and the hook-shaped tip portion 34 coincide with the slots 25. Should tilt. That is, when the inner tube is inserted through the coil spring 30, the core pressing line 33 of the lower end of the coil spring 30 has a tip portion 34 connected between the tube channel 21 and the front tube channel 22. It is press-fitted into the slot 25 so as to extend into the part. As a result, the tip portion 34 can effectively press or block the pencil lead 50.

As shown in FIG. 1A, the lid member 40 has a clip member 43 and an eraser 42. As can be seen in FIGS. 2-10, the lid member 40 is also provided with an inclined stopper 45. The diameter of the stopper 45 integrated with the lid member 40 is smaller than the inner tube 20. The stopper 45 is located on the inner wall of the closed end of the lid member 40. In the assembled state, the stopper 45 is inserted into the end of the tube 20. Thus, the lid member 40 also acts as an actuation button of the pencil by sliding on the end of the tube 20 and also acts as a cap to prevent the shim 50 from coming out of the tube channel 21.

The diameter of the upper end portion 14 'of the outer casing 10 indicated by the dotted line in FIG. 1A before assembly of the pencil is as large as the diameter of the middle portion of the outer kissing. The upper opening corresponding to the upper end 14 'is marked 16'. In order to assemble the pencil, first, the inner tube 20 with the head 24 aligned with the writing end of the pencil, and the tail pressure straight portion 33 of the coil spring 30 slides or rotates so that the slot 25 Insert through the rear end of the coil spring (30) until aligned with. Next, the inner tube 20 assembled with the coil spring 30 is inserted into the lower portion of the outer casing 10 through the upper opening 16 ′, and the upper portion of the tail pressure linear portion 33 is the casing ( The protrusions on the inner wall of the casing 10 made by the recesses 11-11 of the outer wall of 10 are firmly engaged. As a result, the lower ends of the two pencil lead clamps 27-27 project slightly outwardly of the opening 12. (When the two pencil lead clamps 27-27 without the pencil lead are pressed toward each other, their outer diameter is Are slightly smaller than the openings 12 and thus they can protrude out.) After the inner tube is properly inserted, the upper end 14 of the outer casing 10 is moved to the upper protrusions 29-29 of the inner tube 20. Heat-press into the inner side to form a small diameter upper end 14 for holding firmly in the outer casing 10 of the inner tube 20. The assembly of the first embodiment of the present invention is completed by inserting the inner rod of the lid member 40, that is, the stopper 45 into the upper opening of the inner tube 20.

2-6 show various steps in using the inventive pencil. When the tube channel is fully filled with pre-sharpened pencil leads, the number of pencil leads is about 12. Pencil shims are stored in series with the sharp end of each shim toward the writing end of the pencil. 2 shows a pencil before use. When the user begins to press the lid member 40 downward, the projections 28-28 compress the coil spring 30 as in FIG. The shim clamp 27 of the inner tube 20 is completely exposed out of the opening 12 of the outer casing 10. On the other hand, the pressure-reading linear portion 33 of the coil spring 30 slides along the slot 25 by the downward movement of the clamp 27.

When the core pressing straight portion 33 reaches the end wall 251 of the slot 25, the hook tip 34 is pressed by the end wall to extend into the opening 15. As shown in FIG. At this time, the first core of the pencil core 51 in the inner tube 20 is no longer blocked by the pressure-pressure linear portion 33 and released, and automatically falls through the foremost end of the tube channel 21. However, since the diameter of the lowermost tube channel 22 is slightly smaller than the diameter of the shim 51, the dropped shim is retained in the channel.

The tip of the shim 51 exits outward through the shortest tube channel 22 as shown in FIG. 3.

Next, the user releases his finger from the lid member 40 to release the pressure. As a result, the shim clamps 27-27 of the inner tube 20 are withdrawn into the outer casing 10 because the coil spring 30 returns almost to its original length. The tail pressure linear part 33 slides through the slot 25 and returns to the tube channel 21. After the inner tube 20 is further withdrawn, the tip 34 comes into contact with the blunt end of the shim 51, thereby pressing the shim 51 out of the tube channel 22. When the inner tube 20 returns to its original length (ie, when the upper protrusions 29-29 are stopped by the inner surface of the upper opening 16 on the outer casing 10), the first pencil lead 51 As shown in FIG. 3, it is fully indented into the bottom end of the tube channel 22 of the inner tube 20. By inserting the shim 51 into the shim clamp 27, the outer diameter of the clamp 27 is slightly increased so that its diameter is larger than the diameter of the opening 21 of the outer casing 10.

When the user presses the pencil against the writing surface, upward pressure is exerted to press the front end of the inner tube into the outer casing 10, and since the outer diameter of the clamp 27 is slightly larger than that of the opening 12, The upward pressure presses the clamp into the opening 12 to grip the exposed pencil lead 51 very firmly. Thus, the pencil lead 51 is free from fluctuations and vibrations, and writing can be performed very stably.

When the first pencil lead 51 is blunted by use and has to be replaced by the second pencil lead 52, the two clamps 27-27 are pressed against the lid member 40, so that the outer casing 10 is shown in FIG. The above process is repeated by making it protrude out. By removing the pressure, the pencil core pressing straight portion 33 presses the second pencil core 52 into the channel 22 and completely discharges the blunt core 51 out of the inner tube 20. However, since the clamps 27-27 are partially open at the time of discharge of the shim 51, removal of the shim 52 is easily performed without damaging the tip of the shim 52 (see FIG. 6). . The above description has been described in detail for the operation principle and understanding of the present invention, but in actual use, the pressing and releasing movement is continuous, rapid and requires little effort for handling and operation.

In the present invention, the pencil lead used or not used may be withdrawn into the inner tube 20. These pencil retraction steps are shown in Figures 7-10. The user places the front end of the pencil lead on the same surface as the table surface and gently presses the lid member 40 so that the two clamps 27-27 protrude slightly out of the opening 12 of the outer casing 10 to open. At that time, the trailing blunt side of the pencil lead is pushed into the opening 15 by the hook tip portion 34 of the cardiac pressing member, and the lead enters the tube channel 21. On the other hand, since the length of the hook tip 34 is greater than the outer diameter of the trailing blunt end of the pencil lead, the trailing blunt end of the exposed pencil lead slides along the hook tip 34 and enters into the inner tube 20 again. You can. Thus, when the pressure is released, the whole pencil lead is withdrawn into the tube channels 21 and 22. Therefore, the present invention has another advantage that does not require a pencil lead protection cap or cover.

If the pencil lead retract feature is not needed in the present invention, it can be achieved by replacing the hook tip 34 with a straight portion.

A second embodiment of the present invention is shown in FIG.

In this embodiment, first, the tip of the pencil core pressing line portion 33 is not formed at the tip of the hook, and secondly, the lid member 40 has the head 44 and the inclined stopper 45 '. Different from the first embodiment. Since this embodiment does not have a pencil lead retract feature, it requires almost the same operation of the first embodiment in discharging the pencil lead for use.

Thus, there is no need to describe the detailed operation steps of the present embodiment.

12 and 12a show sectional views of the present invention when the pencil lead is exposed and when it is not exposed. FIG. 13 shows an embodiment of a square tube 60 of plastic filled with a number of pre-sharpened pencil leads.

As shown in FIG. 13, each of both ends of the square tube 60 is pressed to form a recess 62 for preventing the pencil lead from escaping from the tube.

In addition, the square tube 60 is bent as shown in (51) under the indentation 62 on the side toward which the pencil tip is directed. The square tube 60 is smaller in diameter than the inner tube 20. As shown in FIGS. 14 and 15, the upper end of the hexagonal tube 60 is cut at 61 and the open end of the hexagonal tube 60 is topmost with a slightly larger diameter of the inner tube 20. By inserting into the buoy pencil cores 50 fall into the inner tube 20 one by one to be completely filled as shown in the second and 12 degrees. 16 shows another embodiment of a square tube.

This embodiment differs from the above embodiment only in that the two ends 63 are pointed hit presses, in accordance with both embodiments of their quadrangular tube 60, the filling of the new pencil lead to dirty the user's finger. It can be done conveniently without. However, if necessary, the pencil cores may be individually inserted into the inner tube 20 without using the plastic square tube 60.

The shim used in the present invention is not limited to the pencil lead. Accordingly, other tools that can utilize the structure of the present invention, such as colored pencils, crayons, paraffin pencils, and the like, are also within the scope of the present invention.

Claims (1)

The outer casing (1) having an open upper and lower ends and having a plurality of recesses adjacent to the lower end thereof, and the coil spring (30) disposed in the outer casing, are about 1 / 3-1 / 2 of the tube length from the lower end. A hollow inner tube 20 having a projection 28 to which the upper end of the coil spring is coupled to the outer side of the tube in the position of and receiving a plurality of pre-sharpened pencil shims, and an open upper end of the inner tube. In the writing implement consisting of a lid member 40 'adapted to be blocked, at the lower end of the coil spring 30, a deep pressure straight portion 33' extending at an angle with respect to the longitudinal axis of the coil spring is formed. And a conical head 2 having a diameter larger than the diameter of the inner tube is formed at the lower end of the inner tube 20, the head having two slots extending from the lower end of the tube along the longitudinal axis of the inner tube. The troughs 25 and 26 are formed, and two slots 25 and 26 are formed in the head extending from the lower end of the tube along the longitudinal axis of the inner tube to form the pencil lead clamp 27 and the slot A slope 25 of one of the troughs is adapted to receive the tail pressure straight portion 33 ′ and the wall 251 of the closed end of the slot 25 is inclined, and the clamp portion And a channel (22) having a diameter smaller than the diameter of the channel (21) of the inner tube by a value sufficient to hold the friction.