KR930003576Y1 - Sharp pencil - Google Patents

Abstract

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Description

Sharp pencil for plotter

1 is a longitudinal cross-sectional view showing the configuration of one embodiment of a mechanical pencil for a plotter of the present invention.

* Explanation of symbols for main parts of the drawings

1: automatic pencil 2: stroke

3: knock mechanism 5: outer cylinder

7: Slider 7a: Jam Jaw

8: external sleeve 9: internal sleeve

10: pen delivery mechanism 11: tip cap

12: slider spring 23: cylindrical ring

25: lead chuck 26: friction imparting member

28: ball 29: metal cylinder

32: Tip cap bushing 32A: Stopper part

33: core residue guide 34: intermediate sleeve

The present invention releases the writing pressure applied to the slider by removing the writing instrument's front end from the ground and so on. When the slider is returned to its original position by the spring force, the lead is automatically drawn by the lead chuck. It relates to a mechanical pencil for a plotter adapted to use an automatic pencil to lose.

As an automatic pencil used in a conventional plotter or the like, referring to FIG. 1, the pendulum 2 is held when writing pressure is applied, while the slider spring 12 is moved toward the front end of the writing instrument when the writing pressure is released. The action of the lead chuck 25 grabbing the pen core 2 when the pendulum itself falls from the lead chuck 25 toward the front end of the writing instrument by the elasticity of the force and the frictional imparting member 26 mounted in the slider 7 A so-called well-known one-way chuck device is incorporated so that the pen core 2 is disengaged so that the front end of the slider 7 touches a paper or the like to write letters, symbols, numbers, and the like.

However, in such a conventional plotter pencil for a plotter, the lead residue made near the front end of the lead chuck 25 is inserted around the spring 12 of the slider 7 and the operation of the slider 7 becomes worse. It is a problem that (7) cannot be stored reliably or the slider 7 cannot protrude from the front end of the tip cap 11.

In order to solve the above problems, the present invention plotter pencil is designed to solve the above problems, and in the automatic pencil 1 having the slider 7 as shown in FIG. 1, the outer wall of the slider 7 Or at least one of the inner wall of the tip cap 11 or the inner wall of the tip cap bushing 32 has a structure in which the lead residue guide part 33 is provided.

With this configuration, the fill tails collected around the slider spring 12 can be discharged to the outside through the fill tail guide portion 33 between the slider 7 and the tip cap bushing 32, so that even if used for a long time By avoiding deterioration of the operation of the slider 7 due to the lead residue around the spring 12, the slider 7 in the tip cap 11 can be stored more reliably and smoothly, as well as the tip cap. From the front end of (11), the slider 7 can protrude more smoothly.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a longitudinal cross-sectional view showing the configuration of one embodiment of a mechanical pencil for a plotter of the present invention. In this embodiment, the inner wall of the tip cap bushing 32 which is in sliding contact with the slider 7 of the automatic pencil 1 is the core. Residue induction part 33 is formed, between the end cap bushing 32 and the end cap 11 and between the end cap 11 and the intermediate sleeve 34 is coupled by interference fit or screw coupling, the slider (7) The latching jaw 7a formed at the end is caught by the tip cap bushing 32, and a slider spring 12 is installed between the tip cap bushing 32 and the cylindrical ring 23, and at the tip cap bushing 32. The stopper part 32A which regulates the advancing of the cylindrical ring 23 is formed, The structure is characterized by the above-mentioned. Here, the pitch of the core residue inducing portion 33 is preferably increased if possible.

In addition, the automatic pencil (1) is provided with a spring 14 for the knock and a cushion spring 31 for varying the resilience force with the spring (14).

The mechanical pencil for a plotter according to the present embodiment having the above-described characteristic structure is slidably moved inside the outer sleeve 8 and the outer sleeve 8 fitted so that the entire configuration thereof can be attached and detached in the outer cylinder 5. An inner sleeve 9 arranged so as to be able to be engaged, a pen delivery mechanism 10 which is mounted in the inner sleeve 9 to allow for advancement of the pen core 2 but prevents retraction, and the outer cylinder 5 Slider 7 which is arranged to slide reciprocating in the tip cap 11 located at the front end of the head and imparts a predetermined frictional force to the pen core 2, and the lead chuck chuck which the pen core sending mechanism 10 holds the pen core ( 25 is slidably engaged with the spring 12, the inner sleeve 9 and the intermediate sleeve 34, which push the slider 7 forward with a stronger force than the chucking spring 27 tightening. Push the stopper (13) and the spring support part (30) forward The circumference of the knock spring (14), the cushion spring (31) provided between the outer cylinder (5) and the spring support portion (30) with different elasticity with the knock spring (14), and the connecting member (15) Fitted so as to be detachable from the guide member 16, it has a configuration with a knock mechanism (3) of the cartridge cartridge type so that the supply and exchange of the pen core (2) is made.

On the other hand, the lead cartridge type knock mechanism is composed of a lead holder (4) for accommodating the lead core (2) and a chuck type opening and closing mechanism portion (17) formed at the front of the lead lead storage portion 4, the chuck opening and closing mechanism portion (17) ) Is inserted so that the guide member 16 can be detached from the guide member 16 to elastically deform when the chuck opening and closing mechanism 17 is pushed into the guide member 16 to open the penetrating through holes (18, 19) On the other hand, when the state in which the stamped and engaged state is released is elastically restored to block the core conduction holes 18 and 19. Reference numeral 22 is a knock cap, and 20 and 21 are outwardly engaging pieces, respectively.

Next, the operation of the automatic pencil 1 in the present embodiment configured as described above will be described.

The operation of the automatic pencil (1) is to be made in two ways, one of the operations is to send the pen core by knocking the knock cap 22, which is the rear end of the lead housing (4) of the knock mechanism (3) It is an operation to lose.

That is, when the rear end of the lead housing 4 is knocked in the state as shown in FIG. 1, the connecting member 15 is moved forward while compressing the knocking spring 14. In this case, the stopper 13 at the front end of the connecting member 15 is pressed. Is caught by the frictional force of the friction step of the sliding groove of the inner sleeve 9, so that the entire inner sleeve 9 blocked together with the connecting member 15, that is, the inner sleeve 9 and the core delivery The mechanism 10 and the cylindrical ring 23 move forward together until the front end of the cylindrical ring 23 reaches the stopper portion 32A of the tip cap bushing 32. In other words, they are united and advanced by the distance χ between the front end of the cylindrical ring 23 and the stopper portion 32A, and the distance χ is the lead delivery amount.

In addition, the connecting member 15 and the stopper 13 are pushed forward again so that the stopper protrusion 13a passes over the friction staircase of the inner sleeve 9 so that only the stopper 13 and the connecting member 15 are advanced. In addition, the front end of the stopper 13 pushes the rear end of the lead chuck 23 forward so that a normal pen core feeding operation is performed.

Another operation is an operation for automatically sending a heart-heart by making a note of writing. That is, since writing is generally performed in a state where the lead 2 is aligned with the front end of the slider 7, as shown in FIG. 1, when the writing is made to resemble little by little, the slider 7 also needs to be moved ( 2) is retracted by wear. In this state, the slider 7 can retreat against the elasticity of the slider spring 12 against the rear side, so that the front end of the cylindrical ring 23 is It is possible to retreat until it touches the latching jaw 7a of the slider 7 or to the compressible distance of the slider spring 12.

By the way, the wear amount of the pen core 2 by writing requires the continuous writing for a very long time to reach the maximum retraction distance of the slider 7, that is, a pencil having a concentration of HB and a diameter of 0.5 mm at a normal writing pressure. The amount of wear required when writing a single Chinese character on high quality paper is only about 0.01 mm, and when used for plotters, the amount of wear required from the left edge to the right edge of the tracing paper is only about 0.1 to 0.2 mm. On the other hand, continuous writing until the slider 7 is retracted as much as possible is not common, and it may be considered that the writing is always stopped or stopped. Thus, if the writing is stopped and the front end of the slider 7 is removed from the ground, The slider 7 is advanced by the elastic force of the slider spring 12, and the pen core 2 is also given a predetermined frictional force from the friction applying member 26 and pulled in the forward direction together with the slider 7 You lose.

On the other hand, since the force for tightening the pen core 2 of the lead chuck 25 holding the pen core 2 is imparted by the chuck tightening spring 27 which is weaker than the slider spring 12, the above-described pen core 2 ) Is compressed by a force pulled in the forward direction, so that the entire lead chuck 25 can move forward. When the entire lead chuck 25 moves forward in this manner, the head portion of the lead chuck 25 moves forward while the ball 28 moves in a cloud contact with the inner tapered wall 29a of the metal cylinder 29. This gradually weakens, the delivery of the lead (2) is made.

According to the series of operations described above, the pen core sending operation is automatically performed, so that writing can be performed, and writing can be continuously performed up to the retreat distance of the slider 7 as much as possible. Reference numeral 30 is a spring support portion that is pushed forward by the cushion spring 31 and the knock spring (14).

As described above, the pen tip sending operation is performed by two operations, that is, when writing by touching the front end of the slider 7 of the automatic pencil 1 on paper or the like, especially during writing, the front end of the slider 7 is intermittently intermittent. When excessive pen pressure is applied transiently or momentarily to the pen core 2, such as when creating a screen or graph in the form of a dot that is brought into contact with a paper or the like, first, the cushion spring 31 is immediately compressed to give an impact. By mitigating the cushioning function, the core part that the chuck is biting is not burdened.

In addition, since the lead residue gathered around the slider spring 12 is discharged to the outside through the lead residue guide portion 33 between the slider 7 and the tip cap bushing 32, the lead residue is around the slider spring 12. Of the slider 7 so that the slider 7 does not deteriorate, so that the slider 7 can be reliably and smoothly stored in the tip cap 11, and the slider 7 protrudes reliably and smoothly from the front end of the tip cap 11. It becomes possible.

In addition, when the tip cap 11 is attached or the tip cap 11 is removed and the slider 7 is inserted or removed, the tip cap bushing 32 and the spring 12 for the slider together with the slider 7 are attached. Since it can be inserted or pulled out, it becomes easy to attach or pull them out, as well as to clean around the cylindrical ring 23.

In the meantime, the lead lead portion 33 of the present invention is not limited to the guide screw portion, but may be a guide groove, and any one of the tip cap 11 or the slider 7 and the tip cap bushing 32 in a circular shape. While the other one to be a polygon may be made to lead the lead residue path between the two places.

As described above, according to the present invention, in the automatic pencil 1 having the slider 7, the outer wall of the slider 7, the inner wall of the tip cap 1, or the inner wall of the tip cap bushing 32 can be used. Since the piercing tail induction part 33 is provided, the piercing tail gathered around the slider spring 12 of the slider 7 is externally provided through the piercing tail induction part 33 between the slider 7 and the tip cap bushing 32. It can be discharged to the edge of the slider 12, so that the residue of the slider 7 is prevented from deteriorating due to the leading edge of the slider 12, so that the slider 7 can be reliably and smoothly stored in the tip cap 11, From the front end of the cap 11, the slider 7 can be projected reliably and smoothly.

Claims (2)

An outer sleeve 8 fitted to be detachable in the outer cylinder 5, an inner sleeve 9 arranged to slidably engage in the outer sleeve 8, the inner sleeve 9 It is arranged to be slidable in the tip cap 11 located at the front end of the pen core delivery mechanism 10, which is mounted inside the pen core 2, which allows forwarding of the pen core 2 but prevents the retraction. 2) the slider 7 which imparts a predetermined frictional force to the 2), the stopper 13 and the spring support part 30, which are slidably engaged with the inner sleeve 9 and the intermediate sleeve 34, to slide forward. The cushion spring (31) provided between the outer cylinder (5) and the spring support portion (30), the knock mechanism (3), and the like with the knock spring 14, the knock spring 14 being different in elasticity In the pencil sharpener for a plotter using the automatic pencil 1 provided, the said pencil A claw 7a is formed on the rider 7 at the rear end of the tip cap bushing 32 installed in the tip cap 11, and the pen core sending mechanism is provided between the slider 7 and the cylindrical ring 23. A slider spring 12 having a larger resilience force than that of the chucking spring 27 of FIG. 10 is installed, and an outer wall of the slider 7 or an inner wall of the tip cap bushing 32 in the tip cap 11. Sharp pencil for plotters, characterized in that the pile core guide portion 33 is provided in any one place. The sharp pencil for a plotter according to claim 1, characterized in that a stopper portion (32A) is formed on the tip cap bushing (32) to regulate the advancement of the cylindrical ring (23).