JPH09207491A - Side knock type sharp pencil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an excellent feeding operation while manufacturing at a low cost by providing a lead inserting part for passing a lead in the pressing direction of a knock top, forming its diameter to double or more as large as the diameter of the lead, and providing at least one lead receiver forward of the inserting part. SOLUTION: A lead tank 11 urged rearward by an elastic member 10 is disposed forward of a barrel 1. Two or more leads are stored in the tank 11, and a knock top 4 is disposed at the intermediate part of the tank 11. A chuck unit 13 engaged with a chuck ring 12 is fixed forward of the tank 11. An engaging member is fixed to the intermediate part of the tank 11, an oblique groove is formed obliquely, and the top 4 is slidably engaged. A lead inserting part for passing the lead in the pressing direction of the top 4 is provided. The diameter of the inserting part is formed at least double as large as the diameter of the lead, and at least one lead receiver is provided forward of the inserting part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a lead-out mechanism arranged inside a barrel and a knock piece arranged radially on a side wall of the barrel so that the knock piece can be pressed by the knocking piece. A side knock type shear that moves the feeding mechanism back and forth and feeds the lead from the barrel by these operations.
It is about Pupencil.

[0002]

2. Description of the Related Art As an example of a side knock type sharp pencil, Japanese Utility Model Laid-Open No. 55-171577 is known.
And, the gist is that "the outer cylinder shaft is provided with a cap at the lower end, movably accommodates an inner cylinder shorter than the outer cylinder shaft, and the function of projecting and retracting the cap from the lower end of the outer cylinder shaft is provided. An inner mechanism return spring and an appropriate locking means are provided, an outer window hole is provided near the gripping fingertip of the outer cylinder shaft, and an inner window hole is provided in a portion corresponding to the outer window hole of the inner cylinder. The core case, the relay pipe, and the 30% chuck are integrally housed, and a fastener is provided on the outside of the 30% chuck protruding from the inside of the inner cylinder and inside the mouthpiece. A side knock button capable of moving the split chuck in the tip direction and returning by a spring is provided, and a side knock button capable of pushing the upper inclined surface of the slider downward in the outer window hole and the core case. A knock cover that can push the 30% chuck toward the tip of the core was provided on the upper end. Head and side knock-type finisher, characterized -. Pupenshiru it is an ".

That is, the cores stored in the core case are separated one by one by the upper end portion of the relay pipe, pass through the relay pipe and are guided to the 30% chuck, and are gripped by the 30% chuck. The slidable element and the 30% chuck are advanced and fed out from the core thus formed by the pressing action of the side knock button in the radial direction.

[0004]

Generally, when the lead-out operation is performed by the side knock type sharp pencil, that is, when the side knock button is pressed, not only the force in the forward direction is applied to the slider, Of course, the force also acts in the direction in which the side knock button is pressed. And the force in the pressing direction against this slider becomes the force in the direction of tilting the slider,
The tilting force increases as the side knock button is pressed. Then, the inclination of the slider causes the connecting portion between the relay pipe and the 30% chuck to be bent. Here, the lead-out failure of the lead occurs. In other words, the core is refracted due to the refraction so that the core cannot be extended, or the amount of extension is reduced.

Further, in recent years, consumers have come to desire low-priced products. Even in companies, labor costs have become high, and it has become necessary to reduce costs for products. Writing instruments such as ball pens and sharp pencils are no exception, and the side knock type sharp pencils described above have been compelled to be manufactured at low cost. Here, as a method of manufacturing at low cost, it is conceivable to integrally form two parts into one part, to simplify the assembling method, or to reduce the number of parts. However, molding the two parts into one part may make the parts themselves inexpensive, but depending on the shape of the parts, the mold device for molding may be complicated and expensive.
Therefore, it is necessary to reduce the number of parts. Assembling becomes easier if the number of parts is reduced. But,
Simply reducing the number of parts will result in the loss of necessary functions. For example, in the case of the above example, if the core case and the relay pipe are reduced, the core exceeds the slider and enters the spring part, and the core cannot be grasped by the 30% chuck, and the core cannot be extended, Further, when the side knock button is pressed, there is a problem that the core is broken.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, in which a lead-out mechanism is arranged inside a barrel and a knock piece is radially attached to a side wall of the barrel. In the side knock type sharp pencil, which is arranged so that it can be pressed, the core feeding mechanism is moved back and forth by the pressing operation of the knock piece, and the core passes through in the direction of pressing the knock piece in the side knock type sharp pencil which extends the core from the barrel. The first gist is that the core insertion part is provided, the diameter of the core insertion part is formed to be at least twice the diameter of the core, and at least one core receiving part is provided in front of the core insertion part. A core feed-out mechanism is arranged inside the shaft cylinder, and a knock piece is arranged on the side wall of the shaft cylinder so as to be able to be pressed in the radial direction, and the core feed-out mechanism is moved back and forth by the pressing operation of the knock piece. Side knock-type finisher feeds from the barrel core by these operations - In the Pupenshiru, provided at least one of the core receiving portion in the vicinity of the knock piece,
A second aspect is that a core insertion hole through which a core passes is formed in the core receiving portion, and a space portion having a step area larger than a cross-sectional area of the core insertion hole is formed on both sides of the core receiving portion. It is a thing.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment will be described with reference to FIGS. A through hole 2 is formed in the side wall of the shaft cylinder 1. The through hole 2
A guide protrusion 3 is formed on the. A knock piece 4 having a U-shaped cross section is attached to the through hole 2 so as to be movable in the radial direction perpendicular to the barrel 1. On the side surface of the knock piece 4, a guide groove 5 that engages with the guide protrusion 3 and slides is formed. Further, the knock piece 4 has an inclined surface portion 6 for advancing a lead-out mechanism described later.
Is also formed. Further, an inclined surface portion 7 parallel to the inclined surface portion 6 is formed on the opposite side of the inclined surface portion 6.
Further, engaging claws 9 that prevent the knock piece 4 from falling off are formed on both side surfaces of an end portion of the knock piece 4 opposite to the knock surface portion 8.

In front of the barrel 1, there is arranged a lead tank 11 for storing a lead biased backward by an elastic member 10 such as a coil spring. The wick tank 11 stores at least two or more wicks. The knock piece 4 is located in the middle of the lead tank 11. Also, the wick tank 1
A chuck body 13 fitted with a chuck ring 12 is fixed in front of 1. Needless to say, the chuck body 13 is for releasing and gripping the core, and the chuck ring 12 is for opening and closing the chuck body 13. The core feeding mechanism is configured by these configurations. An engaging member 14 is fixed to an intermediate portion of the lead tank 11, and an oblique groove 15 is formed in the engaging member 14 in an oblique direction. The knock piece 4 is slidably fitted in the inclined groove 15.
That is, the engaging portion of the knock piece 4 is formed by the inclined surface portion 6 and the inclined surface portion 7 of the knock piece 4, and the engaging member 1
The engagement groove 4 serves as an engagement receiving portion of the engagement portion. The knock piece 4 having a U-shaped cross section may be loosely inserted into the engaging member 14, or may be slightly inserted and inserted. It is possible to prevent the knock piece 4 from swinging and dropping from the barrel 1 when not in use.

A guide groove is formed in the through hole 2 of the shaft cylinder 1,
A guide protrusion that engages with the guide groove may be formed on the side surface of the knock piece 4. Further, the shape of the guide groove or the guide protrusion may be a horn shape as shown in the drawing, an arc shape, or a combination shape of the corner and the arc. What is essential is that the shapes satisfy the mutual engagement relationship and prevent the knock pieces from swinging in the longitudinal direction of the barrel. Further, although reference numeral 18 is a tip member screwed to the front end of the barrel 1, it may be integrally formed with the barrel 1. A core detent member 19 for preventing the retreat of the core is press-fitted inside the tip member 18, and a core protection tube 20 such as a stainless steel pipe for protecting the core is press-fitted at the tip end thereof. It may be integrally formed with the tip member 18.

Next, the operation will be described. When the knock piece 4 is pressed vertically in the radial direction, the inclined surface portion 6 of the knock piece 4 slides in the inclined groove 15 and presses the engaging member 14 forward. Then, by this pressing operation, the lead tank 11
Further, the chuck body 13 advances (see FIGS. 5 and 6), and the lead is projected from the lead protection tube 20. In the case of this example, the side surface of the knock piece can be lightly bent inward and assembled to the barrel, so that the assembly is easy.

Next, a modified example of the knock piece will be described with reference to FIG. Engaging portion 2 that engages with the inclined groove 15 of the engaging member 14
1 is formed on the inner wall surface of the knock piece 22 in a protruding shape. Of course, this engaging portion 21 is formed in an inclined state. In this way, by forming the engaging portion on the inner wall surface of the knock piece, the guide projection 23 of the knock piece 22 that engages with the guide groove 5 of the barrel 1 (through hole 2) can be formed long. In comparison, the knock piece can be prevented from swinging. In addition to the configuration of this embodiment, a reduced diameter portion 24 is formed on the inner surface of the shaft cylinder 1 behind the through hole 2, and the rear end surface 26 of the knock piece 22 is abutted against the surface portion 25 constituted by the reduced diameter portion 24. If they are brought into contact with each other and made to slide, the knock piece 22 can be further prevented from swinging (see FIG. 8).

In the example in which the guide groove or the guide projection is formed on the shaft cylinder, as shown in FIG. 9, the guide member 27 having the guide groove or the guide projection may be fitted into the shaft cylinder as a separate member. As a method of further preventing the knock piece from swinging, in addition to the structure of the previous example, an elastic film such as natural rubber or silicone rubber is formed on the surface of the knock piece, or a coil spring is provided between the knock piece and the barrel. Alternatively, an elastic member such as a magnet that repels each other may be interposed.

A second embodiment will be described with reference to FIGS. 10 to 12. A through hole 2 is formed in a side wall of the barrel 1, and a knock piece 28 having a U-shaped cross section is formed in the through hole 2 in the barrel 1.
It is mounted so as to be movable in the radial direction perpendicular to the. A notch 30 is formed in the middle of the side wall 29 of the knock piece 28, and a front sloped surface 31 is formed at the front end of the side wall 29 of the knock piece 28.
The side wall of the knock piece 28 formed by the cutout portion 30 and the front inclined surface 31 is the first engaging portion 32.
It has become. A rear inclined surface 33 is also formed on the rear surface of the cutout portion 30, and the side wall of the knock piece 28 formed by the rear inclined surface 33 and the rear end portion 34 of the knock piece 28 is the second side. It is the engaging portion 35. Code 3
Reference numeral 6 denotes an engaging claw formed on the side surface of the bottom surface of the knock piece 28, which prevents the knock piece 28 from falling off the shaft cylinder 1.

A wick tank 37 for storing a plurality of wicks biased rearward by an elastic member 10 such as a coil spring is arranged in front of the barrel 1. A chuck body 13 fitted with the chuck ring 12 is fixed in front of the lead tank 37. Further, an engaging member 38 is provided at an intermediate portion of the lead tank 37.
However, it may be formed as a separate member.
In the case of using separate members, the lead tank 37 and the engaging member 38 are press-fitted, fitted with concavities and convexities, or bonded to each other so that the mutual fixed state is maintained.
A notch 39 is formed in the middle of the engaging member 38, and the front of the notch 39 engages with the first engaging part 32 of the knock piece 28. Receiving section 40
It has become. An intermediate inclined surface 41 is formed at the rear end of the first engagement receiving portion 40, and the first engagement portion 32 is formed.
Is engaged with the front inclined surface 31 of the. A rear side of the notch 39 of the engagement receiving portion 38 is a second engagement receiving portion 42 that engages with the second engaging portion 35 of the knock piece 28. A rear end inclined surface 43 is formed at the rear end of the second engagement receiving portion 42 and engages with the intermediate inclined surface 33 of the second engaging portion 35 of the knock piece 28. More specifically, the first engaging portion 32 of the knock piece 28 is
The engagement member 38 is positioned so as to be sandwiched between the cutout portions 39 of the engagement member 38, and the second engagement receiving portion 42 of the engagement member 38.
Are located in a state of being sandwiched by the first engaging portion 32 and the second engaging portion 35 of the knock piece 28.

The front inclined surface 3 formed on the first engaging portion 32 and the second engaging portion 35 of the knock piece 28.
The shape of 1 or the intermediate inclined surface 33 may be curved. The sliding resistance is reduced, and it becomes easier to press. Also,
Like the modification of the first embodiment, the first knock piece 44
The engaging portion 45 and the second engaging portion 46 are formed on the inner wall surface of the knock piece, and the engaging member 47 includes the first engaging portion 45 and the second engaging portion 46 of the knock piece 44. The inclined groove-shaped engagement receiving portions 48 and 49 that engage with each other may be formed. The first engaging portion 45 and the second engaging portion 46 of the knock piece 44 can be hidden, and a product with a good appearance can be provided.

Next, the operation will be described. When the knock piece 28 is pressed vertically in the radial direction, the front inclined surface 31 and the intermediate inclined surface 33 of the knock piece 28 become the intermediate inclined surface 41 and the rear end of the engaging member 38. The engagement member 38 is pressed forward while pressing and sliding on the inclined surface 43. By this pressing operation, the lead tank 37 and the chuck body 13 move forward (see FIG. 12).
See) and the core is paid out.

Next, an example of adding value to the present invention is shown in FIG.
4 and 15 will be described. This is an example in which a rod-shaped body feeding device capable of varying the protrusion amount of the eraser is attached to the rear side. The rod-shaped body feeding device will be described. Although the rear end inner surface (rear portion 1a) of the shaft cylinder 1 is formed in a hexagonal shape as shown in FIG. 15, it may be quadrangular or elliptical. Any non-circular shape will do.
Further, a rod-shaped body guide member 50 having a hexagonal outer shape fitting portion 50a is fitted in the rear portion 1a. That is, the shaft cylinder 1 and the rod-shaped body guide member 50 are non-rotatably fitted to each other. A guide groove 50b is formed on the opposite side of the rod-shaped body guide member 50, and the rear end portion of the guide groove 50b is connected to the guide groove 50b.
0c is formed. An outer cylinder 51 is fitted on the rod-shaped body guiding member 50, and a spiral groove 51 a is formed on the inner wall surface of the outer cylinder 51. Then, the outer cylinder 51 is attached to the rod-shaped body guide member 50 in a state where one end is locked to the collar portion 50c and the other end is locked to a fixing member 52 such as an O-ring, and is sandwiched. There is.

Reference numeral 54 is a rod-shaped member receiving member that holds an eraser 54b. An engagement protrusion 53a is formed on the side surface of the rod-shaped member receiving member 53, and the guide groove 50 is formed.
It engages with the spiral groove 51a via b. To explain the operation, the outer cylinder 51 is connected to the shaft cylinder 1 (the rod-shaped body guide member 5).
When it is rotated relative to 0), the rod-shaped body guide member moves upward in the figure by the spiral groove 51a. This movement causes the eraser 54b to project. Eraser 54
When it is desired to store b, the outer cylinder may be rotated in reverse. As shown in the first example, by attaching the pressing mechanism for feeding the lead to the lead tank, the entire shaft does not become long even if the above-mentioned rod-shaped feed device is attached. By the way, if the above-mentioned rod-shaped body feeding device is attached to the side knock type sharp pencil as shown in the prior art, the whole shaft becomes considerably long and it becomes difficult to use. This is because the link element that is the pressing mechanism is attached to the position of the lead chuck that is the chuck mechanism. In other words, the link element is located in front of the core receiving portion that separates the cores formed in front of the core case one by one. By the way, in the first example, a pressing mechanism (knock piece or slide member) is provided in the middle of the lead tank behind the lead receiving portion.
Is located.

A third embodiment will be described with reference to FIGS. 16 and 17. This is an example in which the fitting state of the knock piece and the through hole in the first and second embodiments is improved in order to prevent the knock piece from swinging. Describing based on the reference numerals of the second embodiment, below the knock piece 28 (in the vicinity of the engaging claw 36),
It has a wide width when viewed from the cross-sectional direction and is press-fitted into the through hole 2. The wide portion is the press fitting portion 54. On the other hand, the width above the knock piece 28 is formed to be narrow, and the width is formed to be narrower than the width of the through hole 2. This narrow portion is the non-press-fitting portion 55. When the knock piece 28 is pressed,
During the pressing process, a gap S is formed between the knock piece 28 and the through hole 2.
Is caused. Next, the operation will be described. When the knock piece 28 press-fitted into the through hole 2 is pressed vertically in the radial direction by a finger or the like, the front inclined surface 31 and the intermediate inclined surface 33 of the knock piece 28 are engaged. The engaging member 38 is pressed forward while pressing and sliding the intermediate inclined surface 41 and the rear end inclined surface 43 of the coupling member 38. In the process of this pressing operation, the press-fitting action of the knock piece 28 into the through hole 2 is released to form the gap S, and the lead tank 37 and the chuck body 13 advance and the lead is fed.

Next, a modification of the third embodiment will be described with reference to FIGS.
This will be described with reference to FIG. Notch 3 of the engaging member 38
This is an example in which the cross-sectional shape of 9 is formed in a trapezoidal shape (trapezoidal portion 56) whose upper part is widened, and the cross-sectional shape of the inner surface of the U-shaped knock piece 28 is also trapezoidal (trapezoidal portion 57). Also, FIG.
As shown in FIG. 8, the engaging member 3 is not operated during the non-pressing operation.
The trapezoidal portion 56 of No. 8 pushes the lower end of the trapezoidal portion 57 of the knock piece 28 to set it into a press-fitted state into the through hole 2. Next, the operation will be described. When the knock piece 28 in the press-fit state is pressed, the trapezoidal portion 5 of the engaging member 38 is moved to the middle portion and then the upper portion of the trapezoidal portion 57 of the knocking piece 28.
6 is located above 6, and the lower side of the trapezoidal portion 57 of the knock piece 28 that has been expanded is returned in the direction of decreasing the diameter.
This returning operation is also performed because the diameter of the lower portion of the trapezoidal portion 56 of the engaging member 38 is reduced. By the return of the trapezoidal portion 57 of the knock piece 28, the press-fitted state with the through hole 2 is released, and a gap S is formed between the side surface of the knock piece 28 and the through hole 2. The time when the press-fitted state is released will be described in detail. The press-fitted state is released before the middle portion of the trapezoidal portion 57 of the knock piece 28 reaches the upper end of the trapezoidal portion 56 of the engaging member 38. There is.

A fourth embodiment will be described with reference to FIGS. A grip portion 58 formed by applying a knurled or relatively flexible paint or liquid rubber member to a gripping portion in front of the barrel 1 (a gripping portion for writing) and solidifying the same.
However, a tubular rubber grip or the like, which is a separate member, may be fitted and inserted. By forming the grip portion 58, and by attaching a rubber grip or the like, fatigue due to writing, pain of fingers, etc. can be alleviated. A through hole 2 is formed in the side wall of the barrel 1 behind the grip portion 58, and a knock piece 28 having a U-shaped cross section is provided in the through hole 2 with respect to the barrel 1. It is mounted so as to be movable in the radial direction in the vertical direction. This knock piece 28
Has a structure similar to that of the knocking piece of the second embodiment, the description thereof will be omitted. A cap 60 having a clip 59 is detachably fitted to the rear of the barrel 1, but only the clip 59 may be integrally molded with the barrel 1.

A slide member 62 biased rearward by an elastic member 61 such as a coil spring is arranged in front of the barrel 1. The chuck body 13 fitted with the chuck ring 12 is provided in front of the slide member 62.
Has been fixed. Although the engaging portion 38 is formed integrally with the slide member 62 at an intermediate portion of the slide member 62, it may be formed as a separate member. When the slide member 62 and the engaging portion (material) 38 are used, the slide member 62 and the engaging member (material) 38
And so on by press-fitting, fitting with concavo-convex, and adhering so that they are kept fixed to each other. Also,
Since this engaging member 38 also has substantially the same structure as the engaging member of the second embodiment, its explanation is omitted.

Behind the slide member 62, there is a core 2.
Approximately three core lead-in holes 63 are formed, and a core receiving member 64 having an outer diameter substantially the same as the inner diameter of the shaft cylinder 1 is press-fitted at the rear end of the core lead-in hole 63. It may be formed integrally with the slide member 62. The core receiving member 64
The inner side of the core is formed in a funnel shape so that the core is easily dropped, and a core insertion hole 66 for guiding the core to the core introduction hole 63 is formed at the lower end of the funnel-shaped portion 65. There is. In other words, the core tank portion 67 is formed on the inner rear side of the shaft cylinder 1 with the core receiving member 64 as a boundary, and the cores are dropped into the core introduction holes 63 one by one by the core insertion holes 66. Further, in front of the slide member 62, a hole 68 having a diameter (outer diameter) substantially the same as that of the core, which is continuous with the core introduction hole 63, and a chuck press-fitting hole 69 are formed. The hole 68 is the core introduction hole 63.
Or the inner diameter of the chuck press-fitting hole 69 and the hole 70 formed at the rear end of the chuck body 13 may have the same diameter as the core.

Next, the operation of the fifth embodiment will be described. Since the lead-in hole is formed to have a diameter larger than the diameter of the lead, the core pin does not easily bend when it is formed by injection molding or the like. Even if the cross-sectional shape is non-circular, the molded product itself is hard to bend and a straight core introduction hole is formed. Further, since the knock piece 28 is arranged behind the grip portion 58 and in front of the clip 59, it is possible to prevent an accidental pressing operation of the knock piece during writing. Next, the operation will be described. When a plurality of cores are inserted into the core tank portion 67, the core insertion hole 6 of the core receiving member 64 is inserted.
One core is separated by 6 and the core introduction hole 63 and the hole 6
It is guided to the chuck body 13 via 8. Here, even if the core is slightly curved, or even if the slide member 62 is slightly curved due to molding or the like, the core introduction hole 63 is formed larger than the outer diameter of the core, so that the core can be closed. Without being smoothly guided to the chuck body 13. When the knock piece 28 is pressed vertically in the radial direction, the front inclined surface 31 and the intermediate inclined surface 33 of the knock piece 28 press and slide on the intermediate inclined surface 41 and the rear end inclined surface 43 of the engaging member 38. Meanwhile, the engaging member 38 is pressed forward. By this pressing operation,
The slide member 62 and the chuck body 13 advance and the lead is fed out.

Although not shown, the length of the chuck body from the core gripping portion to the core receiving portion is set to be larger than the length of the core to be used, so that the trailing end of the preceding core is trailed by 1 Except for the core of the book, many other cores do not come into contact with the trailing end of the preceding core, so that the preceding core smoothly inserts (falls) into the grip portion of the chuck body. Further, since the one lead is following the trailing end of the leading lead, the trailing lead is also smoothly advanced and fed out in accordance with the use (reduction) of the leading lead. Further, in the previous example, the slide member is integrally molded for low cost manufacture, but it is molded separately in order to prevent bending, that is, the slide member 62 may be composed of two members (see FIG. 25). . By using two members, the material of the member into which the chuck body is press-fitted and the material of the member in which the engagement receiving portion is formed can be selected according to the characteristics. still,
When it is composed of two members, it may be a simple surface contact,
As shown in FIG. 26, it is preferable to form the concave-convex fitting portion 69 and the like so that they can be positioned with respect to each other. Further, by using two slide members, it is possible to correct variations in the press-fitting distance of the chuck body into the slide member, and to prevent a reduction in the gripping force of the core due to variations in the press-fitting distance. Moreover, since the pressing distance of the knock piece is increased, the feeling of pressing can be satisfactorily recognized.

A sixth embodiment will be described with reference to FIGS. 27 to 29. A through hole 71 is formed in the side wall of the shaft cylinder 70 in the longitudinal direction, and a knock piece 72 having a U-shaped cross section is formed in the through hole 71 in the radial direction of the shaft cylinder 70. Piece 7
It is rotatably attached with the rear end of 2 as a fulcrum.
As for the mounting method, in the illustrated example,
A recess 73 is formed at the rear end of the knock piece 72 (hereinafter, the upper side in the drawing is referred to as the rear and the lower side is referred to as the front), and the recess 73 is formed.
Is fitted to one end (rear end) of the through hole 71, and a protrusion 74 is formed on the front end of the knock piece 72, and the protrusion 74 is engaged with the other end (front end) of the through hole 71. Although it is attached by combining them, it is not limited to this example.
For example, the knock piece 72 may be moved in parallel to the radial direction of the barrel 70. A front member 76 is screwed to the front of the barrel 70 via a relay member 75. A lead detent member 77 that prevents the lead from retracting is press-fitted inside the tip member 76.
A lead protection tube 78 such as a stainless steel pipe for protecting the lead is press-fitted at the tip of the.

A slide member 80, which is biased rearward by an elastic member 79 such as a coil spring, is arranged on the intermediate member 75. A chuck body 82 fitted with a chuck ring 81 is fixed in front of the slide member 80. Needless to say, the chuck body 82 is for releasing and gripping the core, and the chuck ring 81 is for opening and closing the chuck body. On the other hand, behind the slide member 80 is a lead tank portion 83 that stores a plurality of lead, and the lead tank portion 83 is also inside the shaft cylinder 70. That is, the shaft cylinder 70 itself also serves as the lead tank 83.

Next, the slide member 80 will be described in detail. An inclined surface 84 is formed at the rear end of the slide member 80, and the inclined surface 84 is in contact with the bottom surface 85 of the front end of the knock piece 72. Further, the rear cross-sectional shape of the slide member 80 is circular as shown in FIG. 28, and is formed to have an outer diameter substantially the same as the inner diameter of the barrel 70. Even if they have substantially the same diameter, there is a gap that allows the slide member 80 to move and does not allow the core to be used to pass. Specifically, it is generally called 0.5
mm (JIS (Japanese Industrial Standard) S6013 has a nominal diameter of 0.5 mm, and the lead core has an allowable range of 0.55 mm.
If a core having a diameter of 0.5 mm to 0.58 mm) is used, the gap formed between the barrel 1 and the slide piece 9 is 0.
It is about 1 mm to 0.3 mm. Further, if a 0.2 mm core is used, the gap is 0.05 mm to 0.
It may be set to about 1 mm, and the amount of the gap can be appropriately selected depending on the core used. Further, a core insertion hole 86 for guiding the core to the chuck body 82 is formed in the central portion of the slide member 80 in the longitudinal direction. According to the present invention, by adopting the above-described basic configuration, the shaft cylinder 70 itself is provided in the core tank
3, and the shaft cylinder 70 (core tank 83)
The core has been successfully guided to the chuck body 13.

Hereinafter, some modified examples will be described in detail. In the first example, the rear sectional shape of the slide member 80 is changed. In the structure shown in FIG. 29, the slide member 80 is formed in a substantially quadrangular shape, and its corners are removed to form the shaft cylinder 7.
Although it is slid on the inner wall surface of No. 0, the shapes of the slide member and the inner wall surface of the barrel may be reversed. Of course, the clearance 87 generated between the slide member 80 and the shaft cylinder 70 is smaller than the diameter of the core used. Further, in the one shown in FIG. 30, minute projections (vertical ribs) 88 are formed on the surface of the slide member 80, and the inner wall surface of the shaft cylinder 70 is slid. The shape of the inner wall surface of the shaft cylinder may be reversed. That is, the cross-sectional shape of the slide member may be formed in a circular shape, and the minute projections may not be formed on the inner wall surface of the barrel. Also in this example, the height of the protrusion 88 is smaller than the diameter of the core to be used. In each of the examples, the sliding resistance of the slide member with respect to the barrel is reduced. In addition, as shown in FIG. 31, the inner shape of the shaft cylinder 70 is formed in a hexagonal shape, and the outer shape of the slide member 80 is also formed in a hexagonal shape. As described above, various shapes other than those illustrated can be adopted.

The second example surely prevents the slide member having a circular cross section or the slide member of the first example from rotating with respect to the shaft cylinder 70. Inclined surface 8 of slide member 80
The engaging portion 89 is formed on the outer side surface of the No. 4 and the engaging portion 89 is brought into surface contact with the side surface of the knock piece 72 (FIG. 32,
See FIG. 33). That is, the knock piece 72 prevents the slide member 80 from rotating. Also, FIG.
As shown in FIG. 45, rotation may be prevented by forming a protrusion on the bottom of the slide member and forming a sliding groove with which the protrusion engages on the inner wall surface of the barrel.

The third example is an example in which the core is easily inserted into the core insertion hole of the slide member. As shown in FIG. 35, the upper end portion of the core insertion hole 86 of the slide member 80 may be formed in a conical shape (conical portion 86a), and FIGS.
As shown in FIG. 5, the inclined surface portion 90 may be formed such that the diameter is gradually reduced from the upper end portion of the inclined surface 84 toward the center (core insertion hole 86) of the inner surface.

The fourth example is the example shown in FIG. 38, in which the core is easily inserted into the slide member. A step portion 91 is formed on the inner wall surface of the shaft cylinder 70 at the rear portion of the slide member 80, and becomes a small diameter portion 92 toward the rear. The core caught on the rear end peripheral portion 93 of the slide member 80 is prevented. In the above example, since the core comes into contact with the inclined surface of the slide member, the core oil contained in the core adheres to the inclined surface, so that the pushing operation (sliding) of the knock piece against the inclined surface (slide member) is performed. Operation) is good. Further, particularly in the case where the core member is directly formed on the slide member as in the fourth example, the entire length of the barrel can be shortened. Further, as shown in FIG. 39, a restricting portion 95 may be formed in which a hole 94 into which only one core is inserted is formed inside the barrel 70 that is behind the knock piece 72, and as shown in FIG. It is also possible to form a restriction portion 97 in which a hole 96 into which only one core is inserted is formed at the rear end of the knock piece 72. Since the core does not collect in the rear portion of the slide member 80, the core can be guided to the core insertion hole 86 in a good condition. That is, the restricting portion 95 and the restricting portion 97 serve as a substantial core receiving portion, and the rear portion thereof serves as a lead tank portion.

In the above example, the present invention is applied to the one having the intermediate connecting member. However, as shown in FIG. 41, the tip member is directly attached to the tip of the barrel and the lead-out mechanism is attached to the front part of the barrel. You may attach it. The price can be further reduced. Further, when the knock piece is pressed, the notch portion 98, the inclined surface 99, the rounded portion, or the like may be formed so that the core is not broken at the corners of the front end of the knock piece (see FIG. 42). The length of the cutout portion 98 is, of course, such a length that the core cannot pass through.

Next, various modified examples of the restriction portion formed at the rear end of the knock piece will be described. The first example is an example shown in FIG. 43, in which the restricting portion 100 is located on the side opposite to the example shown in FIG. 40, that is, in the through hole 71 so that the restricting portion 100 does not fit into the barrel 70. It is formed to do. Further, as shown in FIG. 44, a large hole 101 into which the restricting portion 100 can be inserted is formed behind the through hole 71 of the shaft cylinder 70. Knock piece 72 through hole 71 and large hole 1
By inserting from 01, it is possible to assemble to the shaft cylinder 70, and the assembly is simplified. Further, a locking projection 102 is formed at the rear end of the knock piece 72, and the locking projection 102 engages with the inner wall surface of the shaft cylinder 70 to prevent it from falling off the shaft cylinder 70. . Also,
A protrusion 103 is formed on the bottom surface of the slide member 80, and the protrusion 103 engages with a groove 104 formed on the inner wall surface of the shaft cylinder 1 to allow the shaft cylinder 70 of the slide member 80 to be engaged.
Rotation is blocked (see FIG. 45).

FIG. 46 shows a structure in which the fulcrum of the rotational movement of the knock piece 72 in the radial direction of the shaft cylinder 70 is changed.
In addition to making the cross-sectional shape of the restriction portion 105 of No. 2 triangular,
The step portion 106 is formed on the inner surface of the barrel 70, and the step portion 106 is formed.
A part of the rear end of the restriction portion 105 is engaged with the.
Then, this locking position is used as a fulcrum of the knock piece 72 to rotate and move (see FIG. 47). As described above, in the example in which the restriction portion is provided, the outer diameter of the slide member 80 is substantially the same as the inner diameter of the shaft cylinder 70 so that the core does not enter the space between the slide member 80 and the shaft cylinder 70 or the elastic member 10. Although it has a diameter, it is not particularly limited. Since the shaft cylinder 70 itself is used as the core tank behind the shaft cylinder 70, it is not necessary to form the core tank as a separate member as shown in the prior art, and the cost can be reduced. Furthermore, since the core receiving part is formed at the rear of the knock piece, the front-back direction of the knock piece is clear, and when the knock piece is inserted into the barrel, it may be accidentally inserted (assembled) upside down. Absent. In addition, since the front and rear direction of the knock piece is clear, the direction can be quickly determined, and therefore the assembly can be performed easily and quickly, thereby improving the productivity.

The second example is an example shown in FIGS. 48 and 49, in which the core insertion hole 108 of the regulating portion 107 is formed in a slit shape. A through hole 71 is formed in a longitudinal direction on a side wall of the shaft cylinder 70. In the through hole 71, a knock piece 72 having a U-shaped cross section is formed in the knock tube 72 in the radial direction of the shaft cylinder 1. The rear end of 72 is attached as a fulcrum so as to be rotatable. Further, at the rear end portion of the knock piece 72, a slightly cup-shaped restriction portion 107 (core receiving portion) having an outer diameter substantially the same as the inner diameter of the barrel 70 is integrally formed. They may have substantially the same diameter, may be in a fitted state, and may have a gap such that the core does not pass through. A wall is formed in the intermediate portion of the shaft cylinder 70 by the restriction portion 107, and a core tank 108 is provided behind the restriction portion 107 (upper side in the drawing). In addition, a slit-shaped core insertion hole 1 is provided at the center of the restriction portion 107.
Although 09 is formed, an inclined surface may be formed behind the core insertion hole 109 so that the core easily falls toward the core insertion hole 109. Further, an inclined surface 110 is also formed at the lower end of the restriction portion 107 (the end portion facing the side on which the knock piece is formed). This is to prevent the end portion of the lower end of the restriction portion 107 from coming into contact with the inner side surface of the barrel 70 when the knock piece 72 is pressed. Further, the front and rear ends of the knock piece 72 have projections 112 and 11 respectively.
3 is formed, and the projections 112 and 113 are formed on the through hole 7.
By engaging with the front end of No. 1 and the inner surfaces 114, 115 of the rear end, the protrusion (falling) from the barrel 70 is prevented.

FIG. 50 shows an example in which the rotation of the slide member with respect to the shaft cylinder is prevented. The cross-sectional shape of the inside of the shaft cylinder is formed into a substantially quadrangle, and the cross-sectional shape of the slide member 11 is also formed into a quadrangle. is there. As a result, the knock piece 7
The second restricting portion 115 is also formed in a quadrangular shape. Further, rotation can be prevented by forming a protrusion 116 inside the shaft cylinder 70 in which the slit 109 is located and forming a groove 117 on the slide member 80 that engages with the protrusion (FIG. 5).
1, see FIG. 52).

Next, an example in which the knock piece is easily assembled to the barrel will be described. FIG. 53 shows a knock piece 72.
By forming the slit 118 at the rear of the projection 1,
13 is provided with an elastic force to facilitate the insertion of the knock piece 72 into the through hole 71 of the shaft cylinder 70 (see FIG. 54), and also to prevent looseness in the longitudinal direction after the insertion. . The slit 118 may be formed in front of the knock piece 72 and the protrusion 112 may have an elastic force. Alternatively, the slit 118 may be formed only in front of the knock piece 72 and the protrusion 11 is formed.
Only 2 may have elasticity. Further, the protrusion 113
55 may be formed toward the inner side of the knock piece 72 as shown in FIG. In this way, the positions of the protrusions and slits can be appropriately selected. In the modification of the knock piece 72 shown in FIGS. 56 and 57, the projection 113 that engages with the through hole 72 of the shaft cylinder 70 is formed rearward, so that the knock piece 72 and the slide member 80 in the non-pressed state. This is an example where and do not contact. That is, this is an example in which the force always acts in the direction in which the knock piece 72 is disengaged from the shaft cylinder.
It does not come off due to the engagement of. Then, by urging the knock piece 72 in the direction of falling off, it is possible to prevent the knock piece 72 from swinging and to correct the variation in the press-fit distance of the chuck body to the slide member.
It is possible to prevent the gripping force of the lead from being reduced due to the variation in the press-fit distance. Moreover, since the pressing distance of the knock piece is increased, the feeling of pressing can be satisfactorily recognized.

[0039]

According to the present invention, the lead-out mechanism is arranged inside the barrel, and the knock piece is arranged on the side wall of the barrel so as to be able to be pressed in the radial direction. The pushing-out operation of the knock piece causes the lead-out mechanism to move. In a side knock type sharp pencil which moves the core forward and backward by these operations, the core insertion part through which the core passes in the pressing direction of the knock piece is provided, and the diameter of the core insertion part is The first gist is that at least twice the diameter is formed and at least one core receiving portion is provided in front of the core insertion portion, and the core feeding mechanism is arranged inside the barrel.
A knock piece is arranged on the side wall of the shaft cylinder so as to be able to be pressed in the radial direction, and the pushing operation of the knock piece moves the lead-out mechanism forward and backward, and a side-knock type sharp pencil that draws the lead out of the barrel by these operations. At least one core receiving portion is provided in the vicinity of the knock piece, a core insertion hole through which a core passes is formed in the core receiving portion, and the cross-sectional area of the core insertion hole is larger on both sides of the core receiving portion. Since the second gist is that the space portion having the step area is formed, it can be manufactured at low cost, and a good feeding operation can be obtained without deteriorating the original performance.

[Brief description of drawings]

FIG. 1 is a longitudinal half sectional view of an essential part showing the present invention.

FIG. 2 is a perspective view of essential parts showing an engagement relationship between a knock piece and an engagement portion.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a perspective view of a main part showing a shaft tube corresponding to FIG.

FIG. 5 is a longitudinal half sectional view of essential parts showing a pressed state of a knock piece.

6 is a sectional view taken along line BB corresponding to FIG.

FIG. 7 is a perspective view showing another example of a knock piece.

FIG. 8 is a cross-sectional view showing another example of the barrel.

FIG. 9 is a perspective view showing a guide member.

FIG. 10 is a vertical half sectional view showing a second embodiment of the present invention.

FIG. 11 is a perspective view of a main part showing an engagement relationship between a knock piece and an engagement part.

FIG. 12 is a longitudinal half sectional view of an essential part showing a pressed state of a knock piece.

FIG. 13 is a perspective view showing another example of the knock piece.

FIG. 14 is a vertical sectional view showing another example of use of the present invention.

15 is a cross-sectional view taken along the line CC of FIG.

FIG. 16 is a cross sectional view showing a third embodiment of the present invention.

FIG. 17 is a cross-sectional view showing a pressed state of the knock piece corresponding to FIG.

FIG. 18 is a transverse sectional view showing a fourth embodiment of the present invention.

FIG. 19 is a cross-sectional view showing a pressed state of the knock piece corresponding to FIG.

FIG. 20 is a cross sectional view showing a fifth embodiment of the present invention.

FIG. 21 is a perspective view of essential parts showing the engagement relationship between the knock piece and the engagement portion.

FIG. 22 is a vertical half sectional view showing a slide member.

23 is a cross-sectional view taken along the line DD of FIG.

FIG. 24 is a cross-sectional view showing a pressed state of the knock piece corresponding to FIG. 23.

FIG. 25 is a vertical cross-sectional view showing a modified example of the slide member.

FIG. 26 is a vertical cross-sectional view showing another modification of the slide member.

FIG. 27 is a longitudinal sectional view of an essential part showing a sixth embodiment of the present invention.

28 is a cross-sectional view taken along line EE corresponding to FIG. 27.

FIG. 29 is a cross-sectional view showing a modified example corresponding to FIG. 27.

FIG. 30 is a cross-sectional view showing another modification example corresponding to FIG. 27.

FIG. 31 is a cross-sectional view showing another modification example corresponding to FIG. 27.

FIG. 32 is a vertical cross-sectional view showing another modified example of the slide member.

33 is a view on arrow F corresponding to FIG. 32.

FIG. 34 is a vertical cross-sectional view showing still another modified example of the slide member.

34 is a view on arrow G corresponding to FIG.

FIG. 36 is a vertical cross-sectional view showing still another modified example of the slide member.

37 is a view on arrow H corresponding to FIG. 34.

FIG. 38 is a longitudinal sectional view of a main part showing a modified example of the shaft cylinder.

FIG. 39 is a longitudinal sectional view of a main part showing another modification of the barrel.

FIG. 40 is a longitudinal sectional view of a main part showing a modified example of the knock piece.

FIG. 41 is a longitudinal sectional view of a main part showing a modified example corresponding to FIG. 27.

FIG. 42 is a vertical cross-sectional view of a main part showing a modified example of the knock piece.

FIG. 43 is a longitudinal cross-sectional view of a main part showing another modification of the knock piece.

FIG. 44 is an external view of a main part showing a modified example of the barrel.

FIG. 45 is a cross-sectional view showing the engagement relationship between the slide member and the barrel.

FIG. 46 is a longitudinal cross-sectional view of a main part showing still another modified example of the knock piece.

47 is a cross-sectional view showing a pressed state of the knock piece corresponding to FIG. 46.

FIG. 48 is a longitudinal sectional view of an essential part showing still another modified example of the knock piece.

49 is a cross-sectional view taken along line I-I corresponding to FIG. 48.

50 is a cross-sectional view showing a modified example corresponding to FIG. 49.

FIG. 51 is a cross-sectional view showing the engagement relationship between the slide member and the barrel.

52 is a cross-sectional view taken along the line JJ corresponding to FIG. 51.

FIG. 53 is a longitudinal cross-sectional view of a main part showing still another modified example of the knock piece.

54 is a longitudinal sectional view of an essential part showing a state in which the knock piece of FIG. 53 is attached.

FIG. 55 is a vertical cross-sectional view of a main part showing still another modified example of the knock piece.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 shaft cylinder 2 through hole 3 guide protrusion 4 knock piece 5 guide groove 6 inclined surface portion 7 inclined surface portion 8 knock surface portion 9 engaging claw 10 elastic member 11 core tank 12 chuck ring 13 chuck body 14 engaging member 15 inclined groove 18 tip Member 19 Core detent member 20 Core protection tube 20 21 Engagement portion 22 Knock piece 23 Guide protrusion 24 Reduced diameter portion 25 Surface portion 26 Rear end surface 27 Guide member 28 Knock piece 29 Side wall 30 Cutout portion 31 Front inclined surface 32 First Engaging portion 33 rear inclined surface 34 rear end portion 35 second engaging portion 36 engaging claw 37 core tank 38 engaging member 39 notch portion 40 first engaging receiving portion 41 intermediate inclined surface 42 second Engagement receiving part 43 Rear end inclined surface 44 Knock piece 45 First engaging part 46 Second engaging part 47 Engaging member 48 Inclining groove-shaped engaging receiving part 49 Inclining groove-shaped engaging receiving part50 Bar-shaped body guide member 51 Outer cylinder 52 Fixing member 53 Bar-shaped body receiving member 54 Press-fitting part 55 Non-press-fitting part 56 Trapezoidal part 57 Trapezoidal part 58 Grip part 59 Clip 60 Cap 61 Repellent member 62 Sliding member 63 Core introduction hole 64 Core receiving Member 65 Lot-shaped portion 66 Core insertion hole 67 Core tank portion 68 Hole 69 Chuck press-fit hole 70 Shaft cylinder 71 Through hole 72 Knock piece 73 Recess 74 Protrusion 75 Intermediate member 76 Tip member 77 Core detent member 78 Core protection tube 79 Repulsion member 80 Sliding member 81 Chuck ring 82 Chuck body 83 Core tank part 84 Inclined surface 85 Bottom surface 86 Core insertion hole 87 Gap 88 Small protrusion (vertical rib) 89 Engagement portion 90 Conical portion 91 Stepped portion 92 Small diameter portion 93 Rear end peripheral portion 94 hole 95 restricting portion 96 hole 97 restricting portion 98 notch portion 99 inclined surface 100 Restriction part 101 Large hole 102 Locking protrusion 103 Protrusion 104 Groove part 105 Regulation part 106 Step part 107 Regulation part 108 Core insertion hole 109 Core insertion hole 110 Sloping surface 112 Protrusion 113 Protrusion 114 Rear end inner surface 115 Rear end inner surface 116 Projection 117 Groove 118 Slit

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[Procedure amendment]

[Submission date] May 1, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of drawings]

FIG. 1 is a longitudinal half sectional view of an essential part showing the present invention.

FIG. 2 is a perspective view of essential parts showing an engagement relationship between a knock piece and an engagement portion.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a perspective view of a main part showing a shaft tube corresponding to FIG.

FIG. 5 is a longitudinal half sectional view of essential parts showing a pressed state of a knock piece.

6 is a sectional view taken along line BB corresponding to FIG.

FIG. 7 is a perspective view showing another example of a knock piece.

FIG. 8 is a cross-sectional view showing another example of the barrel.

FIG. 9 is a perspective view showing a guide member.

FIG. 10 is a vertical half sectional view showing a second embodiment of the present invention.

FIG. 11 is a perspective view of a main part showing an engagement relationship between a knock piece and an engagement part.

FIG. 12 is a longitudinal half sectional view of an essential part showing a pressed state of a knock piece.

FIG. 13 is a perspective view showing another example of the knock piece.

FIG. 14 is a vertical sectional view showing another example of use of the present invention.

15 is a cross-sectional view taken along the line CC of FIG.

FIG. 16 is a cross sectional view showing a third embodiment of the present invention.

FIG. 17 is a cross-sectional view showing a pressed state of the knock piece corresponding to FIG.

FIG. 18 is a transverse sectional view showing a fourth embodiment of the present invention.

FIG. 19 is a cross-sectional view showing a pressed state of the knock piece corresponding to FIG.

FIG. 20 is a cross sectional view showing a fifth embodiment of the present invention.

FIG. 21 is a perspective view of essential parts showing the engagement relationship between the knock piece and the engagement portion.

FIG. 22 is a vertical half sectional view showing a slide member.

23 is a cross-sectional view taken along the line DD of FIG.

FIG. 24 is a cross-sectional view showing a pressed state of the knock piece corresponding to FIG. 23.

FIG. 25 is a vertical cross-sectional view showing a modified example of the slide member.

FIG. 26 is a vertical cross-sectional view showing another modification of the slide member.

FIG. 27 is a longitudinal sectional view of an essential part showing a sixth embodiment of the present invention.

28 is a cross-sectional view taken along line EE corresponding to FIG. 27.

FIG. 29 is a cross-sectional view showing a modified example corresponding to FIG. 27.

FIG. 30 is a cross-sectional view showing another modification example corresponding to FIG. 27.

FIG. 31 is a cross-sectional view showing another modification example corresponding to FIG. 27.

FIG. 32 is a vertical cross-sectional view showing another modified example of the slide member.

33 is a view on arrow F corresponding to FIG. 32.

FIG. 34 is a vertical cross-sectional view showing still another modified example of the slide member.

35 is a cross-sectional view taken along the line GG corresponding to FIG. 34 .

FIG. 36 is a vertical cross-sectional view showing still another modified example of the slide member.

37 is a view on arrow H corresponding to FIG. 34.

FIG. 38 is a longitudinal sectional view of a main part showing a modified example of the shaft cylinder.

FIG. 39 is a longitudinal sectional view of a main part showing another modification of the barrel.

FIG. 40 is a longitudinal sectional view of a main part showing a modified example of the knock piece.

FIG. 41 is a longitudinal sectional view of a main part showing a modified example corresponding to FIG. 27.

FIG. 42 is a perspective view showing a modified example of the knock piece.

FIG. 43 is a longitudinal cross-sectional view of a main part showing another modification of the knock piece.

FIG. 44 is an external view of a main part showing a modified example of the barrel.

FIG. 45 is a cross-sectional view showing the engagement relationship between the slide member and the barrel.

FIG. 46 is a longitudinal cross-sectional view of a main part showing still another modified example of the knock piece.

47 is a cross-sectional view showing a pressed state of the knock piece corresponding to FIG. 46.

FIG. 48 is a longitudinal sectional view of an essential part showing still another modified example of the knock piece.

49 is a cross-sectional view taken along line I-I corresponding to FIG. 48.

50 is a cross-sectional view showing a modified example corresponding to FIG. 49.

FIG. 51 is a cross-sectional view showing the engagement relationship between the slide member and the barrel.

52 is a cross-sectional view taken along the line JJ corresponding to FIG. 51.

FIG. 53 is a perspective view showing still another modified example of the knock piece.

54 is a longitudinal sectional view of an essential part showing the process of attaching the knock piece of FIG. 53. FIG.

FIG. 55 is a perspective view showing still another modified example of the knock piece.

FIG. 56 is a diagram showing a state in which another knock piece is attached.
FIG.

57 is a perspective view showing the knock piece of FIG. 56. FIG.

[Explanation of reference numerals] 1 shaft cylinder 1a rear part 2 through hole 3 guide protrusion 4 knock piece 5 guide groove 6 inclined surface portion 7 inclined surface portion 8 knock surface portion 9 engaging pawl 10 elastic member 11 core tank 12 chattering 13 chuck body 14 Engagement member 15 Inclined groove 18 Tip member 19 Core detent member 20 Core protection tube 21 Engagement portion 22 Knock piece 23 Guide protrusion 24 Reduced diameter portion 25 Surface portion 26 Rear end surface 27 Guide member 28 Knock piece 29 Side wall 30 Notch portion 31 Front sloped surface 32 First engagement portion 33 Rear sloped surface 34 Rear end portion 35 Second engagement portion 36 Engagement claw 37 Core tank 38 Engagement member 39 Cutout portion 40 First engagement receiving portion 41 Intermediate inclined surface 42 Second engagement receiving portion 43 Rear end inclined surface 44 Knock piece 45 First engaging portion 46 Second engaging portion 47 Engaging member 48 Inclined groove-like engaging receiving portion 49 Inclination The groove-shaped engagement receiving portion 50 rod-like body guide members 50a fitting portion 50b guide groove 50c flange portion 51 the outer tube 51a spiral groove 52 fixing member 53 rod-like body receiving member 53a engaging projection 54 press-fitted portion 54b eraser 55 non press-in portion 56 Trapezoidal part 57 Trapezoidal part 58 Grip part 59 Clip 60 Cap 61 Elastic repellent member 62 Sliding member 63 Core introduction hole 64 Core receiving member 65 Funnel-shaped part 66 Core insertion hole 67 Core tank part 68 Hole 69 Chuck press-fitting hole 70 Shaft cylinder 71 Transparent Hole 72 Knock piece 73 Recess 74 Protrusion 75 Intermediary member 76 Tip member 77 Core detent member 78 Core protection tube 79 Repulsion member 80 Slide member 81 Chuck ring 82 Chuck body 83 Core tank part 84 Inclined surface 85 Bottom surface 86 Core insertion hole 86a conical portion 87 gap 88 minute protrusions (vertical ribs) 89 engaging portion 90 inclined Part 91 step portion 92 small diameter portion 93 rear peripheral portion 94 hole 95 regulating portion 96 hole 97 restricting portion 98 notch 99 inclined surface 100 restricting portion 101 large hole 102 locking projection 103 projection 104 groove 105 restricting portion 106 step portion 107 Restriction Part 108 Core Insertion Hole 109 Core Insertion Hole 110 Inclined Surface 112 Protrusion 113 Protrusion 114 Rear End Inner Surface 115 Rear End Inner Surface 116 Projection 117 Groove 118 Slit S Gap

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] FIG.

[Correction method] Change

[Correction contents]

FIG. 34

 ─────────────────────────────────────────────────── ─── Continuation of the front page (31) Priority claim number Japanese Patent Application No. 7-100763 (32) Priority date Hei 7 (1995) March 31 (33) Priority claim country Japan (JP) (31) Priority Claim No. Japanese Patent Application No. 7-127173 (32) Priority Date No. 7 (1995) April 27 (33) Country of priority claim Japan (JP) (31) Priority claim number Japanese Patent Application No. 7-155306 (32) Priority Hihei 7 (1995) May 30 (33) Priority claiming country Japan (JP) (31) Priority claim number Japanese Patent Application No. 7-336159 (32) Priority Sun Hei 7 (1995) November 30 (33) ) Priority claiming country Japan (JP) (31) Priority claiming number Japanese Patent Application No. 7-336163 (32) Priority date Hei 7 (1995) November 30 (33) Priority claiming country Japan (JP)

Claims (11)

[Claims] 1. A lead-out mechanism is arranged inside the barrel, and a knock piece is arranged on the side wall of the barrel so that the knock piece can be pressed in the radial direction. The pushing operation of the knock piece moves the lead-out mechanism back and forth. In the side knock type sharp pencil for feeding the lead from the barrel by these operations, a lead insertion portion through which the lead passes in the pressing direction of the knock piece is provided, and the diameter of the lead insertion portion is at least 2 of the diameter of the lead. A side knock type sharp pencil, characterized in that it is formed more than twice as many times and that at least one core receiving portion is provided in front of the core insertion portion. 2. A lead-out mechanism is arranged inside the barrel, and a knock piece is arranged on the side wall of the barrel so as to be able to be pressed in the radial direction. The push-out operation of the knock piece causes the lead-out mechanism to move back and forth. In the side knock type sharp pencil for feeding the lead from the barrel by these operations, at least one lead receiving portion is provided in the vicinity of the knock piece, and a lead insertion hole through which the lead passes is formed in the lead receiving portion. At the same time, a space pencil having a step area larger than the cross-sectional area of the core insertion hole is formed on both sides of the core receiving portion. 3. The side knock type sharp pencil according to claim 1 or 2, wherein the knock piece is arranged on a side wall of the barrel so as to be vertically pressed in the radial direction, and the knock piece is attached to the knock piece. An engaging portion is formed in an oblique direction with respect to the operating direction of the knock piece, and an engaging receiving portion that engages with the engaging portion is formed in the lead-out mechanism, and the engaging portion and the engaging receiving portion are formed. A side-knocking type sharp pencil, which is slidably engaged in a state of sandwiching. 4. The side knock type sharp pencil according to claim 1 or 2, wherein the knock piece is arranged on a side wall of the barrel so as to be vertically pressed in a radial direction, and the knock piece is attached to the knock piece. At least two engaging portions are formed in an oblique direction with respect to the operating direction of the knock piece, and the lead-out mechanism has an engaging receiving portion that engages with the engaging portions.
A side knock type sharp pencil, wherein the engaging portion and the engaging receiving portion are slidably engaged with each other so as to be sandwiched therebetween. 5. The side knock type sharp pencil according to claim 1 or 2, wherein the knock piece is arranged on the side wall of the barrel so as to be vertically pressable in the radial direction. A side knock type sharp pencil, characterized in that a press-fitting part and a non-press-fitting part are formed in the. 6. The side knock type sharp pencil according to claim 1 or 2, wherein a grip portion is formed at a front portion of the shaft cylinder, while a grip portion is formed at a rear portion of the shaft cylinder. A side knock type sharp pencil in which a clip is arranged and the knock piece is arranged behind the grip portion and in front of the clip. 7. The side knock type sharp pencil according to claim 2, wherein the diameter of the core insertion hole formed in the core receiving member is set to a diameter that allows one core to pass therethrough. Characteristic side knock type sharp pencil. 8. The side knock-type sharp pencil according to claim 1 or 2, wherein a slide member for transmitting the action of the knock piece to the lead-out mechanism is arranged in the lead-out mechanism. And a core insertion hole is formed in the slide member, and a gap formed between the outer diameter of the slide member and the shaft cylinder is smaller than the outer diameter of the core. Sharp
Puppencil. 9. The side knock type sharp pencil according to claim 8, wherein an inclined surface whose diameter gradually decreases toward the center is formed on the inner surface of the slide member, and the inclined surface and the core insertion hole are connected to each other. A side knock type sharp pencil that is characterized. 10. The side knock type sharp pencil according to claim 1 or 2, wherein a core receiving portion having an outer diameter substantially the same as the inner diameter of the barrel is provided at the rear portion of the knock piece. A side knock type sharp pencil, characterized in that a lead insertion hole through which a lead passes is formed in the lead receiving portion. 11. The side knock type sharp pencil according to claim 1 or 2, wherein a core receiving portion having an outer diameter substantially the same as the inner diameter of the barrel is provided at the rear portion of the knock piece. A side-knock-type sharp pencil, which is formed integrally and has a slit-shaped lead insertion hole through which a lead passes in a lead receiving portion.