KR930006718Y1 - Cushion equipment of sharp pencil - Google Patents

Abstract

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Description

Cushion mechanism of the pencil

1 is a cross-sectional view showing a first embodiment of the present invention.

2 is a development of the inclined surface cam in FIG.

3 is a view of the cam in FIG. 1, a is a side view, b is a top view, c is a perspective view.

4 is a perspective view of the sleeve.

FIG. 5 is a front view of the a tube, in which FIG.

FIG. 6 is a rotation blocking projection in FIG. 1, which is a side view and b is a top view. FIG.

7 is a cross-sectional view showing a second embodiment of the present invention.

FIG. 8 is a sleeve in FIG. 7 wherein a is a side view and b is a top view. FIG.

9 is a sectional view showing a third embodiment of the present invention.

10 is a sleeve in FIG. 9, wherein a is a sectional view and b is a side view.

11 is a cross-sectional view showing a fourth embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

1: front outer cylinder 2: rear outer cylinder

6: pen delivery mechanism 8: chuck tightening ring

11, 11a, 11b: sleeve 15: teeth

16: cushion spring 19a, 19b: inclined cam

20a, 20b: slope 21a, 21b: projection

The present invention relates to a cushioning mechanism of the mechanical pencil that can arbitrarily adjust the degree of cushioning when writing.

Conventionally, there are several knock-type mechanical pencils with a cushion function that allows the pen core to enter the writing instrument when excessive pen pressure is applied, but the pen core is pushed in response to the writing pressure in a fixed state according to the writing conditions. It has not been proposed to provide a cushion mechanism that can adjust the position.

Therefore, the conventional pencil pencil is easy to be broken because there is no cushion mechanism in the writing state in which the pencil tip is knocked and protrudes from the front end, and the pen tip is fixed. In particular, it was more easily broken when the long line of mind was drawn to draw long lines at once, such as when drafting.

In the case of the sharp pencil with a cushion function as described above, the size of the cushion for the core can not be adjusted.Therefore, there was a drawback that the core was uncomfortable when the writing pressure fluctuated severely, such as writing a letter. .

The present invention has been devised to solve the above problems, and the cushion that best suits the writing conditions or hardness, appearance, lipid, etc. at that time so that the pen core does not break when excessive writing pressure is applied to the pen core. In addition to being able to adjust the degree (cushion stroke), the object of the present invention is to provide a cushion mechanism that can secure the entrance and exit of the core when no cushion is required at all.

The cushioning device of the present invention for achieving the above object divides the sleeve pressing the chuck clamp ring of the knock type mechanical pencil into two parts, a front sleeve and a rear sleeve, and installs a cushion spring therebetween. The rear sleeve can be slid freely axially to either the front barrel or the rear barrel and the teeth can be rotated integrally, and an inclined cam is placed between the rear sleeve and the other barrel on either side. On the other side, it has a structure in which the projection which hangs this inclined cam is formed.

With this configuration, the sleeve is divided into two and the cushion spring is mounted therebetween, so that the sleeve is integrally toothed freely sliding in the axial direction to one outer cylinder, and the inclined cam surface is interposed between the other outer cylinder. Since the outer space of the cushion spring can be arbitrarily expanded and contracted by relatively rotating both outer cylinders, the pressure of the cushion spring against the chuck tightening ring is continuously increased and decreased, and the size of the cushion is in close contact with the cushion spring. It can be arbitrarily adjusted from the state of zero to the maximum value which is the most extended state.

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

1 is a cross-sectional view of a first embodiment of the present invention, in the drawings, reference numeral 1 is a front outer cylinder and 2 is a rear outer cylinder, and these front outer cylinders 1 and rear outer cylinders 2 are fitting parts (3). Are connected to rotate freely from each other. The tip cap 4 is fixed to the front end of the front outer cylinder 1 via the locking portion 5.

Reference numeral 6 denotes a lead delivery mechanism, and the lead chuck 7 is mounted to reciprocate in the axial direction. At the front end of the lead chuck 7, the chuck portion 7a at the front end of the lead chuck 7 is provided. Chuck tightening ring (8) is integrally engaged with the rear portion (7b) of the lead chuck (7) to the front end portion (10) of the inner cylinder (fill pipe; 9), and the step portion of the tip cap (4) It is pressed by the lead chuck pressure spring 13 mounted between the spring support portion 12a at the front end of the front portion sleeve 11a to be contacted with the 14 and the chuck tightening ring 8 to fix the pen core 41. It is attached so that

In addition, the front end outer cylinder (1) and the inner cylinder (9) is inserted so as to slide concentrically in the axial direction, the front end (10) having the spring bearing portion (12a) in contact with the chuck tightening ring (8) Between the front part sleeve 11a and the rear part sleeve 11b which can be slid freely in the axial direction via the front part outer cylinder 1 and the toothed part 15 and can be rotated integrally. The cushion spring 16 is mounted so as to contact the spring bearing portion 17 at the rear end of the front sleeve 11a and the spring bearing portion 18 at the front end of the rear sleeve 11b.

The rear end portion of the rear portion sleeve 11b slides in contact with the inclined surfaces 20a and 20b of the pair of inclined cams 19a and 19b, which are formed by half circumferences integrally installed on the inner circumferential surface of the rear outer cylinder 2, respectively. A pair of projections 21a and 21b are provided.

FIG. 2 is a development view in which the projections 21a and 21b are hung on the inclined cam surfaces 19a and 19b, and FIG. 3 is a side view of the inclined cam surface 19 integrally fitted to the inner circumferential surface of the rear outer cylinder 2. (a) and the top view (b), the perspective view (c), and FIG. 4 are the perspective views which show the projection 21a, 21b integrally installed in the front part sleeve 11a, The inclined cam surface 19a, 19b. Is integrally fitted with the fitting work 23 having a groove 22 that fits into a projection (not shown) on the inner circumferential surface of the rear outer cylinder 2 to fix the rotation as shown in FIGS. 3A and 3B. The cylindrical part 24 is comprised.

In addition, since the relative rotation range between the inclined surface cams 19a and 19b and the projections 21a and 21b is a semicircle, the rear outer cylinder 2 and the protrusions 21a and 21b in which the inclined surface cams 19a and 19b are integrally integrated are integrally formed. In order to limit the relative rotation range between the front outer cylinder (1) which is rotated integrally by the toothed portion (15) to the front sleeve (11a) installed in a semicircle, that is 180 degrees, the circular arcs are rotated by mutual rotation The rotary stop projections 25 and 26 of the shape are integrally inserted into the rear of the front cylinder 1 (see FIGS. 5A and 5B) and the inner peripheral surface of the rear outer cylinder 2 with projections 27 integrally. (A) and (b), wherein the center angle of the arc-shaped rotating jingles 25, 26 is 75 ° of the projection 25 (the fifth (b). ), The projection 26 is 105 ° (figure 5 (b), which is 180 ° in total), so that the rotation stopping projections 25, 26 can be rotated relatively 180 ° or semicircular.

On the other hand, the inner cylinder 9 fitted to the rear end of the lead chuck 7 is integrally fitted with a lid 30 having a spiral shaft 29 and a toothed portion 31 in the lid 30. Peel cam (33) consisting of a cylindrical portion (32) can be easily peeled off and is fitted through a hook member (hook), such as an unshown click button, which is to be rotated integrally. The teeth are interlocked so as to rotate integrally with the rear outer cylinder 2 via the bite portion 34, and the cylindrical knock portion 36 is fitted to the annular projection 35 of the spiral shaft 29, and the knock portion ( 36 is provided with a clamping portion 38 for fixing the eraser 37 while being freely reciprocating in the axial direction at the inner circumference thereof, and the projection 39 hanging on the spiral portion 2 9a of the spiral shaft 29. A sliding cylinder 40 having a fitted therein.

Therefore, when the knock portion 36 is knocked, it is transmitted to the lead chuck 7 through the inner cylinder 9 coupled to the knock portion 36 to allow the pen core 41 to enter and exit. In addition, as the relative rotation between the rear outer cylinder (2) and the knock portion (36), the sliding cylinder (40) is rotated relative to the spiral axis (29) and the sliding reciprocating movement in the axial direction by the eraser (37) You can enter and exit.

Next, the operation of this embodiment configured as described above will be described.

When the front outer cylinder (1) and the rear outer cylinder (2) relatively rotated, a pair of projections integrally installed on the rear portion sleeve (11b) integrally rotated with the front outer cylinder (1) via the toothed teeth (15). (21a, 21b) is relatively rotated between the semi-circular circumference while sliding between the pair of inclined cams (19a, 19b) integrally installed in the rear outer cylinder (2), thus turning in one direction When 21a, 21b slides toward the higher side of the inclined surfaces 20a, 20b of the inclined cams 19a, 19b, the rear portion sleeve 11b moves to the left in the drawing to move the cushion spring 16. By compressing, the pressing force against the chuck tightening ring 8 by the front sleeve 11a is increased, and the writing pressure is increased to the core 41 through the chuck tightening ring 8.

Then, when the cushion spring 16 is compressed to be in close contact with each other to an almost limit, the axial movement of the front sleeve 11a is fixed, so that the cushioning action with respect to the lead 41 is lost. Will be fixed.

Next, when the other side rotates, the projections 21a and 21b slide toward the lower side of the inclined surfaces 20a and 20b, so that the rear sleeve 11b moves to the right to relax the cushion spring 16. The pressing force on the ring 8 is reduced to give the pressing force reduced on the core 41. Subsequently, the rotation continues, and when the cushion spring 16 is in the most relaxed state, the cushion 41 is given the maximum cushioning action.

7 shows a second embodiment of the present invention, in which portions overlapping with those of the first embodiment are denoted by the same reference numerals, and portions thereof will be omitted.

As in the first embodiment, the front portion sleeve 11a has the front end portion 12 of the cushion spring 16 which is described later on the step 14 and the chuck tightening ring 8 of the tip cap 14. The pressure is received at the rear end.

The cushion spring 16 is mounted between the spring bearing portion 17 of the front portion sleeve 11a and the spring bearing portion 18 of the rear portion sleeve 11b, and the inclined surface cams 19a and 19b are formed. As in the case of the first embodiment, while being integrally fitted to the inner circumferential surface of the front outer cylinder (1), the projections (21a, 21b) that are caught by the inclined surface cams (19a, 19b) to slide the medial teeth 15 It is configured to be installed on the outer circumferential surface integrally with the spring support portion 18 of the front end portion of the rear portion sleeve 11b which is integrally toothed to slid freely in the axial direction to the rear outer cylinder 2 and rotated integrally.

FIG. 8 shows a side view (a) and a top view (b) of the rear portion sleeve 11b, although not shown, between the front outer tube 1 and the rear outer tube 2 described in the first embodiment. Rotation support protrusions are provided to limit the rotation.

Next, the operation of the second embodiment configured as described above will be described.

When the front outer cylinder (1) and the rear outer cylinder (2) relatively rotated, a pair of integrally installed in the rear portion sleeve (11b) that is integrally rotated with the rear outer cylinder (2) via the toothed portion (15). The projections 21a and 21b slide relatively between the semicircular circumferences while sliding between the pair of inclined cams 19a and 19b integrally installed in the front outer cylinder 1, and as a result, the rear portion sleeve 11b. ) Slides in the axial direction to impart a cushioning action to the core 41 as in the first embodiment.

9 and 10 are drawings of a third embodiment of the present invention, and the same reference numerals will be given to parts overlapping with the first and second embodiments in the drawings, and description thereof will be omitted.

In this third embodiment, the sleeve 11 is configured alone, and the cushion spring 16 is installed between the sleeve 11 and the rear outer cylinder 2. That is, the cushion spring 16 is mounted between the spring bearing portion 17 at the rear of the sleeve 11 and the spring bearing portion 18 at the front of the rear outer cylinder 2. The sleeve 11 receives the pressing force of the cushion spring 16 and the front end portion 12 contacts the step portion 14 and the chuck tightening ring 8 of the tip cap 4 to the core 41. It acts to give a cushion during writing.

In addition, the pair of inclined cams 19a and 19b is integrally fitted to the inner circumferential surface of the rear cylinder 2 via the engagement ring 23, and rotates integrally with the rear cylinder 2. And a pair of projections (21a, 21b) is provided on the rear end of the toothed sleeve 11 in the front end outer cylinder (1) to freely slide and integrally rotate in the axial direction via the toothed engaging portion (15) have.

10, a cross-sectional view (a) and an outline view (b) of the sleeve 11 are shown, where reference numeral 15a is free to slid freely and integrally in an unshown groove of the front outer cylinder 1. It is a toothed protrusion that can be rotated.

Next, the operation of the third embodiment configured as described above will be described.

When the front outer cylinder (1) and the rear outer cylinder (2) is relatively rotated, a pair of projections integrally installed on the sleeve (11) which rotates integrally with the front outer cylinder (1) via the toothed portion (15) ( 2 1a and 21b are relatively rotated over a semicircle between the inclined surface cams 19a and 19b integrally provided in the rear outer cylinder 2. At this time, since the sleeve 11 receives the pressing force of the cushion spring 16 and touches the tip cap 4 so that the axial movement is fixed, the pair of protrusions 21a integral with the sleeve 11 are fixed. 21b) is also fixed in the axial position. Therefore, the distance between the projections 21a and 21b and the inclined surface cams 19a and 19b changes according to the relative rotation of the two. Therefore, when the gap is narrowed to one side, the cushion range of the pen core 41, which is pushed in by the writing pressure, is narrowed, and the projections 21a and 21b and the inclined cams 19a and 19b almost reach the cushion at the extreme. No action. If you rotate to the other side to increase the gap, the cushion range is widened, and at the extreme, the gap is widest to give the maximum cushion.

11 is a cross-sectional view of a fourth embodiment of the present invention. Here, the same parts as those of the above embodiments will be described with the same reference numerals and some descriptions thereof will be omitted.

As in the third embodiment, the cushion spring 16 is mounted between the sleeve 11 and the rear outer cylinder 2 to cushion the pen core 41 when writing.

In addition, a pair of inclined cams (19a, 19b) are integrally installed on the inner circumferential surface of the front outer cylinder (1), and slid freely in the axial direction to the rear outer cylinder (2) via the toothed engaging portion (15) and rotated integrally. A pair of projections 21a and 21b are provided on the outer circumferential surface of the sleeve 11 which is toothed so as to face the inclined cam surfaces 19a and 19b.

In the fourth embodiment configured as described above, when the front outer cylinder 1 and the rear outer cylinder 2 are rotated relatively, the sleeve 11 rotates integrally through the teeth 15, so that the sleeve ( 11) rotates relatively with the inclined surface cams 19a, 19b integrally installed in the front outer cylinder 1 of the projections 21a, 21b integrally with the projections 21, and the projections 21a, 21b according to the rotation as in the third embodiment. And the cushioning action range is adjusted by changing from the zero state in which the space between the inclined surfaces 20a and 20b reaches to the maximum open state.

In the above embodiments, all of the inclined surface cams 19a and 19b are provided on the outer cylinder side, and the protrusions 21a and 21b that are caught by the inclined surface cams 19a and 19b are provided on the sleeve 11 side. On the contrary, since the inclined surface cam is provided on the sleeve side and the projection is caught on the inclined surface cam on the outer cylinder side, the same function as the cushion, so that the present invention is included.

In addition, the installation position of the inclined surface cam, the projection and the cushion spring is shown in the embodiment from the first embodiment to the fourth embodiment, but the present invention is not limited to these embodiments.

In addition, in the embodiments other than the first embodiment, the description of the configuration of the rotary jersey protrusion is omitted, but the rotary jersey protrusion is provided in all the embodiments, and the position is good as long as it is relatively rotated. As in the first embodiment, the front outer cylinder 1 and the rear outer cylinder 2 are installed between the sleeve 11 and the outer cylinder of the front outer cylinder or the rear outer cylinder which are not toothed on the sleeve 11. .

According to the present invention as described above, the sleeve 11 that touches and presses the chuck tightening ring 8 is divided into a front portion sleeve 11a and a rear portion sleeve 11b, and the sleeve is interposed therebetween. Cushion spring (16) is pressed to the pressure, and the rear portion sleeve (11b) which is freely slid to the outer cylinder of one of the front outer cylinder (1) and the rear outer cylinder (2) and axially rotated freely. Since the inclined surface cams 19a and 19b are caught between the other outer cylinders, the inclined surfaces 20a and 20b of the inclined surface cams 19a and 19b when the front outer cylinder 1 and the rear outer cylinder 2 rotate relatively. As the projections 21a and 21b are slid and moved in the axial direction, the sleeve 11 expands and contracts the cushion spring 16 and is applied to the pen core 41 via the sleeve 11. The pressure is reduced. Therefore, the size of the cushion provided to the core 41 can be arbitrarily adjusted in accordance with the writing conditions up to the maximum relaxed maximum in the state of the zero that the cushion spring 16 is pressed and adhered.

In addition, the sleeve 11, the front outer cylinder 1 and the rear outer cylinder 2 mounted between the outer cylinder for relatively rotating the cushion spring 16 to the sleeve 11 pressed against the chuck clamp ring 8 are pressed. The front outer cylinder (1) and the rear outer cylinder (2) are installed in one of the outer cylinders so that the inclined cams (19a, 19b) are slid freely in the axial direction and rotated integrally and are caught between the other outer cylinders. ) Rotates relatively, the distance between the inclined surface cams 19a and 19b and the projections 21a and 21b is from the zero state where the inclined surfaces 20a and 20b and the projections 21a and 21b are almost in contact with each other. By varying continuously, the size of the cushion relative to the core 41 can be adjusted arbitrarily from the maximum zero to the maximum spread.

In any of the above cases, the size of the cushion that is tailored to the purpose of use or according to the writing pressure of the user can be adjusted to give the core.

In particular, when drawing a drawing, etc., the length of the pen core or the pen tip inclined to the ground was so high that the writing pressure was too high and the pen core was easily broken. In addition, the protruding length is shortened and the shock can be absorbed, thereby preventing the lead from being broken. And if you give a cushion when writing letters, when the penis enters and bothers you can make the cushion smaller to match the user's writing pressure, or 0 if necessary.

Claims (2)

The front part sleeve 11a which presses the chuck clamping ring 8 which tightens the lead chuck 7 of the pen core delivery mechanism 6 of a knock-type mechanical pencil in the front direction, and the front part sleeve 11a of Rear back sleeve 11b disposed at the rear, cushion spring 16 mounted between the front front sleeve 11a and the rear front sleeve 11b, front outer cylinder 1 or rear outer cylinder 2 Tooth engaging portion 15 for coupling the rear portion sleeve 11b freely axially and integrally rotating on either side, the rear portion sleeve 11b and the other outer cylinder 1 or 2 ) Between the inclined surface cams (19a, 19b) having circumferential inclined surfaces (20a, 20b) on one side and the inclined surfaces (20a, 20b) of the inclined surface cams (19a, 19b) on the other side. The cushion mechanism of the mechanical pencil characterized in that () was installed. A sleeve 11 for pressing the chuck tightening ring 8 for tightening the lead chuck 7 of the pen core feeding mechanism 6 of the knock-type mechanical pencil 6 in the forward direction, the sleeve 11 and the front outer cylinder 1 Or the cushion spring 16 mounted between one of the outer cylinders 1 or 2 of the rear outer cylinder 2, and the sleeve 11 are free to axially slide the one outer cylinder 1 or 2 in the axial direction. Inclined cams (19 a, 19b) having a circumferentially inclined surface (20a, 20b) on either side between the toothed engaging portion 15, the sleeve 11 and the other outer cylinder (2 or 1) to engage to rotate integrally And a projection (21a, 21b) to be caught on the inclined surface (20a, 20b) of the inclined surface cam (19a, 19b) on the other side of the sharp pencil.