JPH10305687A - Mechanical pencil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To operate a lead letting-out mechanism by rotating a knocking member in a circumferential direction to a barrel. SOLUTION: A slider 8 formed with a lead insertion hole 8a is disposed longitudinally movably to a barrel 1 at a front part of the barrel 1. A chuck 13 covered with a chuck ring 12 is fixed to a front end of the slider 8. The chuck 13 releases or gasps a lead, and the ring 12 opens or closes the chuck 13. When a sphere 6 of an operating unit of a knocking dwell 4 is rotated in a circumferential direction to the barrel 1 by a finger or the like, since an oblique surface 7 of the dwell 4 is engaged with an oblique surface 9 of the slider 8, the surfaces 7, 9 advance the slider 8 and the chuck 13 while relatively rotatably sliding by the rotating operation. And, as the chuck 13 is advanced, the lead is fed out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sharpening pencil in which a lead-out mechanism is disposed inside a shaft cylinder, and the lead-out mechanism is operated by a knock member.

[0002]

2. Description of the Related Art Japanese Utility Model Application Laid-Open No. 57-90887 is an example. The claims for the utility model registration include: "In the knock-type sharpening pencil, in which the core held by the chuck is sequentially fed out by the moving distance of the tightening ring fitted to the taper portion of the chuck, At the rear end, a pressing cover 7 is formed by abutting one end of an operation lever 8 swingably supported inside the sheath 10 on the upper surface 7B,
The pressing portion 11A of the pressing pin 11 having the locking flange 11B at an arbitrary position is inserted into the concave portion 8A at the other end.
A knock-type sharp pencil characterized by projecting from 2A. It is described. That is, by pressing the pressing pin 11, the operating lever 8 is operated, and at the same time, the lead tank 4 is advanced to feed the lead.

[0003]

However, in the above-mentioned prior art, a large number of members are required for feeding out the core, and therefore, there are many sliding points between the members, the frictional resistance is increased, and the force is increased. In this case, the lead-out operation becomes heavy and causes trouble. In addition, since there are many members, the number of man-hours for assembling also increases, and the price of the product increases.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a core feeding mechanism disposed inside a shaft cylinder, and the core feeding mechanism is operated by a knock member. A first aspect of a sharp pencil, wherein the knock-out member is rotated in a circumferential direction with respect to a barrel to activate the lead-out mechanism, and a lead-out mechanism is provided inside the barrel. Place,
A sharpening pencil in which the lead-out mechanism is operated by a knocking member, wherein the knocking member is rotatably mounted on a shaft cylinder in a forward or rearward direction with respect to the shaft cylinder, and the front or rear portion thereof is rotatable. The second gist of the present invention is to operate the lead-out mechanism by rotating the knock member rearward.

[0005]

FIG. 1 to FIG. 6 show a first example. A portion to be gripped in front of the barrel 1 having a circular inner cross section (grip portion for writing)
Is formed with a grip portion 2 having an uneven shape, but a rubber-like elastic body or the like may be fitted thereto, or a liquid rubber member may be applied and solidified. By forming or attaching the grip portion 2, fatigue due to writing, finger pain, etc. are alleviated. An L-shaped through hole 3 is formed in the side wall of the barrel 1 behind the grip portion 2, and an operating portion 5 of a knock piece 4 described below is provided in the through hole 3. It is arranged in a state protruding from 1. A sphere 6 is attached to the top of the operation unit 5 so as to buffer the finger to be operated. The knock piece 4 has a hollow shape, and the front end face is an inclined surface 7. Here, the L-shaped through hole 3 will be described in detail. One of the L-shaped through holes is formed in a rectangular shape along the longitudinal direction of the barrel. Further, the other through-hole continuously formed in a direction perpendicular to the through-hole is formed in a circumferential surface direction of the shaft cylinder.

At the front of the barrel 1, a slider 8 having a core insertion hole 8a is disposed so as to be movable back and forth with respect to the barrel. The slider 8 is formed with an inclined surface 9 at the intermediate portion thereof, with which the inclined surface 7 of the knock piece 4 is engaged, and a reduced diameter portion 10 behind the inclined surface 9. The reduced diameter portion 10 penetrates the hollow portion of the knock piece 4, and a core receiving member 11 for separating the core one by one is attached to the rear end. On the other hand, slider-8
, A chuck body 13 fitted with a chuck ring 12 is fixed. Needless to say, chuck body 1
Numeral 3 is for releasing and holding the lead, and chuck ring 12 is for opening and closing the chuck body 13.

Reference numeral 14 denotes a resilient member such as a coil spring for urging the chuck body 13, the slider 8 and the like rearward. A tip member 16 into which the center detent member 15 is press-fitted is detachably attached to the front end of the barrel 1 by screwing or the like. On the other hand, a rear portion of the barrel 1, specifically, behind the core receiving member 11, is a core tank portion 17 for storing a plurality of cores, and is provided at a rear end of the core tank portion 17 (shaft cylinder 1). Has an eraser 18 and a cap 19 which is detachably attached so as to cover the eraser 18. A clip 20 is fixed to the cap 19.

Next, the operation will be described. First, first
The use example of is explained. From the state shown in FIG. 1, the operation section of the knock piece 4 is rotated in the circumferential direction with respect to the barrel 1 by a finger or the like. By this rotation, the inclined surface 7 of the knock piece 4 and the slider
8 are engaged, so that those inclined surfaces 7,
The slider 8 and the chuck body 13 move forward while the relative rotation 9 and the slide 9 are performed. Then, as the chuck body 13 advances, the core is extended. Next, a second usage example will be described. From the state of FIG. 1, the operation unit of the knock piece 4 is pressed forward with a finger or the like. Since the inclined surface 7 of the knock piece 4 is engaged with the inclined surface 9 of the slider 8 by this pressing operation, the slider 8 and the chuck body 13 move forward. Then, as the chuck body 13 advances, the core is extended.

A second example will be described with reference to FIGS. A rectangular window hole 22 from which a knock blade described later protrudes is formed on the side surface of the intermediate portion of the shaft cylinder 21. A slider 24 in which a core insertion hole 23 is formed is disposed at a front portion of the barrel 21 so as to be able to move back and forth with respect to the barrel.
The slider 24 has an inclined surface 25 at a rear end, and further has a tubular portion 26 formed rearward. A knock blade 27 is formed at a position corresponding to the window hole 22 on the cylindrical portion 26 so as to protrude from the window hole 22. In addition, a repelling member 14, a chuck ring, a chuck body, and the like are arranged in front of the slider 24 as in the first example.

A knock member 29 having an inclined surface 28 formed at the front end is inserted into the cylindrical portion 26 of the slider 24, and a knock blade 30 also projects from the window hole 22 at the knock member 29. It is formed in a state. Of course, the knock member 29 is also formed with a core insertion hole 29a, and at the rear end of the core insertion hole, a hole through which one core can pass (not shown).
Is fixed. The inside of the shaft cylinder 21, which is behind the center receiving member 31, serves as a center tank portion 32. Next, a usage example will be described. When each of the blades 27, 30 is pinched and closed with a finger or the like, the inclined surface 28 of the knock member 29 presses the inclined surface 25 of the slider 24 while relatively rotating.
Let me move forward. With this advance, the chuck body and the like also advance, and the lead is extended from the shaft cylinder. In the present embodiment, the core is extended by closing the respective blades. However, the core may be extended by opening the respective blades.

A third example will be described with reference to FIG. A lead tank 34 for storing a plurality of leads is disposed inside the barrel 33 so as to be movable back and forth, and a chuck body 35 and a chuck ring 36 serving as a lead feed mechanism are disposed in front of the lead tank 34. ing. Reference numeral 37 denotes a repellent member for urging the lead tank 34 and lead feed mechanism rearward. An inclined surface 38 is formed at an intermediate portion of the core tank 34, and a weight 40 is attached to a rear end of the core tank 34 via an L-shaped support member 39. The support member 39 is detachably attached to the core tank 34.
Perform refilling of the wick into the wick tank. An inclined ring 42 having an inclined surface 41 which is in contact with and engages with the inclined surface 38 of the core tank 34 is press-fitted inside the rear of the shaft cylinder 33.

Next, an example of use will be described. Shaft barrel 33
Is held in hand and the weight 40 is swung so as to rotate.
The rotation of 0 causes the core tank 34 to rotate. At this time, the inclined surface 38 of the lead tank 34 and the inclined surface 41 of the inclined ring 42
And the core tank 34 is in contact with the repellent member 3.
7 performs a forward movement and a backward movement against the resilience force of the arm. The lead-out mechanism is operated by the forward / backward movement, and the lead is fed out. In the present example, the core was fed by rotating the core tank with the weight, but as shown in FIG. 7 (fourth example), the weight 44 was fixed to the rear end of the tilt ring 43 and tilted. While the ring 43 is rotated, the core tank 45 may not be rotatable but may be movable back and forth. Of course, an inclined surface 46 is formed at the front end of the inclined ring 43, and an inclined surface 47 is also formed at the rear end of the core tank 45. Reference numeral 48 denotes a tail plug for preventing the inclined ring 43 from dropping from the rear end of the shaft cylinder, and the weight body of this example has a circular cross section. Instead of rotating the lead tank urged by the repelling member as in the previous example, the tilt ring is rotated, so that the lead-out operation can be easily performed. Further, since the weight is circular, the operation space can be reduced.

A fifth example will be described with reference to FIGS. A slider 51 having a center receiving portion 50 formed at the rear end is urged rearward by a resilient member 52 at an intermediate portion of the shaft cylinder 49 so as to be able to move back and forth. The slider-5
A lead-out mechanism (not shown) such as a chuck body is attached to the front of 1 as in the previous example. A step 53 is formed in the middle of the slider 51,
A reduced diameter portion 51a is formed rearward from the step. A window hole 54 is formed in the side wall of the shaft cylinder 49, and the window hole 54 is arranged with the knock piece 55 exposed. The knock piece 55 is supported on the inner surface of the barrel 49 by a shaft support (the shaft 56 of the knock piece 55 and the barrel 49).
With the shaft hole 49a). A projection 55a is formed on the side surface of the knock piece 55, and abuts and engages with the step portion 53 of the slider 51. That is, by rotating the knock piece 55 forward or backward, the slider 51 is advanced and the lead is extended.

A sixth example will be described with reference to FIG. Shaft barrel 57
The slider 58 is disposed in the middle portion of the first member so as to be movable backward and forward by the elastic member 52.
A lead-out mechanism (not shown) such as a chuck body is attached in front of the slider 58 as in the previous example. An inclined surface 59 is formed at the rear end of the slider 58, and a knock piece 60 rotatably supported by the shaft cylinder 57 abuts and locks on the inclined surface 59. I have. The knock piece 60 is formed in a triangular elliptical shape and serves as a cam. The knock piece 60 protrudes from the window 61 of the shaft cylinder 57. Next, a usage example will be described. When the knock piece 60 is tilted and rotated forward, the slider-58 moves forward due to its cam shape. Then, the lead is extended by the advance of the slider-58.

A seventh example will be described with reference to FIGS.
A slider 63 similar to the first example slider-8 is urged rearward by an elastic member 64 so as to be able to move back and forth at an intermediate portion of the shaft cylinder 62. A lead-out mechanism (not shown) such as a chuck body is attached to the front of the slider 63 in the same manner as in the previous example. An inclined surface 65 is formed in the middle of the slider 63, and a reduced diameter portion 66 is formed behind the inclined surface 65.
A core receiving member 67 is press-fitted into the rear end of the reduced diameter portion 66, and the inside of the shaft cylinder 62 behind the core receiving member 67 serves as a core tank portion 68. An inclined cylinder 70 having an inclined surface portion 69 formed on the front end surface is inserted into the reduced diameter portion 66 of the slider 63. A flat portion 71 is formed on the opposite surface behind the inclined cylinder 70,
A knock piece 72 having a U-shaped cross section is engaged with the plane portion. A projection 73 is formed on the side of the knock piece 72, and the projection 73 is engaged with a circumferential groove 74 formed on the inner wall surface of the shaft cylinder 62. That is, the knock piece 72 is rotatable circumferentially with respect to the shaft cylinder 62. Reference numeral 75 denotes an operation piece on which the knock piece 72 is formed, and the operation piece 75 protrudes from the shaft cylinder 62.

Next, an example of use will be described. The first use example is an example in which the lead is fed by rotating the knock piece 72 in the circumferential direction with respect to the shaft cylinder 62. When the knock piece 72 is rotated in the circumferential direction with respect to the shaft cylinder 62, the inclined surface portion 69 of the inclined cylinder 70 presses the inclined surface 65 of the slider 63. By this pressing operation, the slider 63
The lead-out mechanism is advanced and the lead is paid out. The second example of use is an example in which the knock piece 72 is pulled out (rotated) forward or backward with respect to the shaft cylinder 62 so as to extend the lead. The knock piece 72 is attached to the barrel 62
On the other hand, when the slider is tilted forward, the knock piece 72 presses the step 71a of the flat portion 71, whereby the slider 63 is also pushed forward. The lead is extended by the advance of the slider 63.

[0017]

According to the present invention, there is provided a sharp pencil in which a lead-out mechanism is arranged inside a barrel, and the lead-out mechanism is operated by a knock member. First, the fact that the center feeding mechanism was actuated by rotating in the circumferential direction
The present invention is a sharp pencil in which a lead-out mechanism is disposed inside a barrel, and the lead-out mechanism is operated by a knocking member. A second feature is that the core feeding mechanism is actuated by rotating the knock member forward or rearward so as to be rotatable forward or rearward, so that the configuration is simple and inexpensive. In addition, the core can be easily fed out.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first example of the present invention.

FIG. 2 is an external view and a longitudinal sectional view of a main part of FIG.

FIG. 3 is an external view and a longitudinal sectional view of a main part showing an example of use of the present invention.

FIG. 4 is an external view of a main part and a longitudinal sectional view showing a second example.

FIG. 5 is a sectional view taken along line AA of FIG. 4;

FIG. 6 is a longitudinal sectional view showing a third example.

FIG. 7 is a longitudinal sectional view showing a fourth example.

FIG. 8 is a longitudinal sectional view of a main part showing a fifth example.

FIG. 9 is a sectional view taken along line BB of FIG. 8;

FIG. 10 is a longitudinal sectional view of a main part showing a sixth example.

FIG. 11 is a longitudinal sectional view of a main part showing a seventh example.

FIG. 12 is a sectional view taken along line CC of FIG. 11;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 shaft cylinder 2 grip portion 3 through hole 4 knock piece 5 operating portion 6 spherical body 7 inclined surface 8 slider 9 inclined surface 10 reduced diameter portion 11 core receiving member 12 chuck ring 13 chuck body 14 resilient member 15 core detent member 16 Tip member 17 Core tank portion 18 Eraser 19 Cap 20 Clip 21 Shaft cylinder 22 Window hole 23 Core insertion hole 24 Slider 25 Inclined surface 26 Cylindrical portion 27 Knock blade 28 Inclined surface 29 Knock member 30 Knock blade 31 Core receiving member 32 Core Tank part 33 Shaft cylinder 34 Core tank 35 Chuck body 36 Chuck ring 37 Repellent member 38 Inclined surface 39 Support member 40 Weight 41 Inclined surface 42 Inclined ring 43 Inclined ring 44 Weight body 45 Core tank 46 Inclined surface 47 Inclined surface 48 Tail Stopper 49 barrel 50 core receiving part 51 slider 52 resilient member 53 step 54 Window hole 55 Knock piece 56 Shaft 57 Shaft cylinder 58 Slider-59 Inclined surface 60 Knock piece 61 Window hole 62 Shaft cylinder 63 Slider-64 Resilient member 65 Inclined surface 66 Reduced diameter portion 67 Core receiving member 68 Core tank portion 69 Inclined Surface part 70 Inclined cylinder 71 Flat part 72 Knock piece 73 Projection 74 Circumferential groove 75 Operation piece

Claims (2)

[Claims] 1. A core feeding mechanism is arranged inside a barrel,
A sharp pencil in which the centering mechanism is operated by a knock member, wherein the centering mechanism is operated by rotating the knocking member in a circumferential direction with respect to a shaft cylinder. Sharp pencil. 2. A core feeding mechanism is arranged inside the barrel,
A sharpening pencil in which the lead-out mechanism is operated by a knocking member, wherein the knocking member is rotatably mounted on a shaft cylinder in a forward or rearward direction with respect to the shaft cylinder, and the front or rear portion thereof is rotatable. 3. The sharp pencil according to claim 1, wherein the lead-out mechanism is actuated by rotation of the knock member rearward.