JP2013001020A - Shake-out type mechanical pencil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shake-out type mechanical pencil, which delivers a lead 15 by inertial force of a weight body 19, and which rotates the lead 15 in one direction by forward-rearward movement of a chuck 5 and a connecting tool 9 by writing.SOLUTION: A lead tank 8 is connected to a rear part of the chuck 5, and the weight body 19 is provided at the outside of the lead tank 8 to be slidable in the longitudinal direction. The connecting tool 9 for receiving a fastening tool 6 pressed by the chuck 5 is configured to be rotatable with respect to a slide member 3. Further, a rotating mechanism of a lead holder 16 for rotating the lead 15 is positioned in front of the chuck 5.

Description

  The present invention relates to a swing-out mechanical pencil that draws a lead by the inertial force of a weight body and rotates the lead in one direction by a back and forth movement of a chuck and a connecting tool by writing.

In general, the writing instrument is written with a slight tilt, but when writing with the mechanical pencil tilted, the lead is reduced by one side, so that the end face of the lead becomes elliptical and the writing width gradually increases. It was. Therefore, it was necessary to rotate the mechanical pencil in order to maintain a narrow writing width.
In order to solve this problem, there is a mechanical pencil that rotates the lead by a certain amount by applying writing pressure, and advances the chuck by a certain amount of the lead by the inertial force of the weight body generated by shaking the shaft cylinder. Are known.

  However, the mechanical pencil has a mechanism for rotating the lead disposed behind the chuck. Therefore, when a weight body slidable in the longitudinal direction is provided outside the lead tank, the mechanical pencil As the overall length becomes longer, the outer diameter of the shaft tube becomes thicker.

JP 2010-36391 A JP 2010-52198 A

  The problem to be solved is that, when a mechanism for rotating the lead in one direction by moving the chuck and connecting tool back and forth by writing is provided on the swing-out mechanical pencil that draws out the lead by the inertial force of the weight body, The overall length of the shaft becomes longer and the outer diameter of the shaft tube becomes thicker.

  The present invention relates to a swing-out mechanical pencil that advances a chuck by an inertial force of a weight body and feeds a core, and rotates the core in one direction by a back and forth movement of a chuck and a connecting tool by writing. The tank is connected, and a weight body is provided on the outside of the core tank so as to be slidable in the longitudinal direction, and a fastener pressed backward in the longitudinal direction by the chuck is received by the connector, and the connector is attached to the slide member. The slide member is configured to be rotatable, the slide member is movable in the longitudinal direction with respect to the gripping member and cannot be rotated, and the cam member is configured to be unrotatable with respect to the slide member in front of the slide member. Further, a front cam and a rear cam are formed on the cam member, and a front cam and a rear cam are formed on the rotating member so that the front cam of the cam member and the front cam of the rotating member can be brought into contact with each other. In addition, the rear cam of the cam member and the rear cam of the rotary member are configured to be able to contact each other, and the slide member moves back and forth in conjunction with the back and forth movement of the chuck and the coupling tool by writing, whereby the cam member and the rotary member Are moved back and forth, and the front cam of the cam member, the front cam of the rotating member, the rear cam of the cam member, and the rear cam of the rotating member come back and forth and come into contact with each other, so that the rotating member rotates in one direction. The main feature is that the lead holder is rotated by a predetermined angle in conjunction with the member, and the lead held by the lead holder with an appropriate force is rotated as the lead holder rotates.

  The present invention has an advantage that the entire length is not increased even if a weight body is provided outside the core tank, and the diameter of the shaft cylinder is not increased by positioning the rotation mechanism of the core holder by writing pressure in front of the chuck. It is what

FIG. 1 is a cross-sectional view showing a swing-out mechanical pencil according to a first embodiment of the present invention. Example 1 FIG. 2 is an enlarged cross-sectional view of a main part showing the swing-out mechanical pencil according to the first embodiment of the present invention. Example 1 3 is an enlarged cross-sectional view taken along line AA of FIG. Example 1 FIG. 4 is an enlarged explanatory view of a main part showing a developed state of the rotating mechanism by the sliding member and the rotating member in FIG. Example 1 FIG. 5 is an enlarged cross-sectional view of a main part showing a state in which writing pressure is applied to the swing-out mechanical pencil according to the first embodiment of the present invention. Example 1 FIG. 6 is an enlarged explanatory view of a main part showing a developed state of the rotating mechanism of the sliding member and the rotating member in FIG. Example 1 FIG. 7 is an enlarged explanatory view of a main part showing a developed state of the rotating mechanism of the sliding member and the rotating member in a state where the writing pressure is released from the state of FIG. Example 1 FIG. 8 is a cross-sectional view showing the swing-out mechanical pencil according to the second embodiment of the present invention. (Example 2) FIG. 9 is a cross-sectional view of the main part showing a state in which writing pressure is applied in the swing-out mechanical pencil according to the second embodiment of the present invention. (Example 2) FIG. 10 is an enlarged cross-sectional view of a main part showing a swing-out mechanical pencil according to a third embodiment of the present invention. (Example 3) FIG. 11 is an enlarged explanatory view of a main part showing a developed state of the rotating mechanism of the sliding member and the rotating member in FIG. (Example 3) FIG. 12 is an enlarged cross-sectional view of a main part showing a state in which writing pressure is applied in the swing-out mechanical pencil according to the third embodiment. (Example 3) FIG. 13 is an enlarged explanatory view of a main part showing a developed state of the rotating mechanism of the sliding member and the rotating member in FIG. (Example 3) FIG. 14 is an enlarged cross-sectional view of a main part showing a swing-out mechanical pencil according to a fourth embodiment of the present invention. Example 4 FIG. 15 is an enlarged cross-sectional view of a main part illustrating a state in which writing pressure is applied to the swing-out mechanical pencil of the fourth embodiment. Example 4 FIG. 16 is an enlarged cross-sectional view of a main part showing a swing-out mechanical pencil according to a fifth embodiment of the present invention. (Example 5) FIG. 17 is an enlarged cross-sectional view of a main part showing a state in which writing pressure is applied in the swing-out mechanical pencil of Example 5. (Example 5) FIG. 18 is an enlarged cross-sectional view of a main part showing a swing-out mechanical pencil according to a sixth embodiment of the present invention. (Example 6) FIG. 19 is an enlarged cross-sectional view of a main part showing a swing-out mechanical pencil according to a seventh embodiment of the present invention. (Example 7) FIG. 20 is a cross-sectional view of a main part showing an oscillating mechanical pencil according to an eighth embodiment of the present invention. (Example 8) FIG. 21 is an enlarged cross-sectional view of a main part showing a swing-out mechanical pencil according to an eighth embodiment of the present invention. (Example 8) FIG. 22 is an enlarged cross-sectional view of the main part showing the swing-out mechanical pencil of Example 9 of the present invention. Example 9 FIG. 23 is an enlarged plan view of a main part showing the swing-out mechanical pencil of FIG. Example 9 FIG. 24 is an enlarged cross-sectional view of the main part showing the swing-out mechanical pencil of Example 10 of the present invention. (Example 10) FIG. 25 is an enlarged cross-sectional view of a main part illustrating a state in which the rotation of the lead is prevented in the swing-out mechanical pencil according to the tenth embodiment. (Example 10) FIG. 26 is an enlarged cross-sectional view of the main part showing the swing-out mechanical pencil of Example 11 of the present invention. (Example 11) FIG. 27 is an enlarged explanatory view of a main part showing a developed state of the cam portion of the lock member and the cam portion of the front shaft in FIG. (Example 11) FIG. 28 is an enlarged cross-sectional view of a main part showing a state where the rotation of the lead is prevented in the swing-out mechanical pencil of the eleventh embodiment. (Example 11) FIG. 29 is an enlarged explanatory view of a main part showing a cam deployed state of the cam part of the locking member and the front shaft in FIG. (Example 11) FIG. 30 is a cross-sectional view of the main part showing the swing-out mechanical pencil of Example 12 of the present invention. Example 12 FIG. 31 is a cross-sectional view of a principal part showing a state in which rotation of the lead is prevented in the swing-out mechanical pencil of the twelfth embodiment. Example 12 FIG. 32 is a cross-sectional view of a principal part showing an oscillating mechanical pencil according to a thirteenth embodiment of the present invention. (Example 13) FIG. 33 is a cross-sectional view of a principal part showing an oscillating mechanical pencil according to a fourteenth embodiment of the present invention. (Example 14) FIG. 34 is an enlarged front view showing a cushioning material in the swing-out mechanical pencil of Example 14. (Example 14) FIG. 35 is an enlarged right side view of FIG. (Example 14) FIG. 36 is an enlarged cross-sectional view of the main part showing the swing-out mechanical pencil of Example 15 of the present invention. (Example 15) FIG. 37 is an enlarged cross-sectional view of the main part showing the front shaft, slide member, and slide member in FIG. (Example 15) 38 is an enlarged cross-sectional view taken along line AA of FIG. (Example 15) FIG. 39 is a cross-sectional view showing the swing-out mechanical pencil of Example 16 of the present invention. (Example 16) FIG. 40 is an enlarged cross-sectional view of the main part showing the swing-out mechanical pencil of Example 17 of the present invention. (Example 17)

  In the present invention, the rotation mechanism of the lead holder by writing pressure is positioned in front of the chuck, so that the lead is fed out by the inertial force of the weight body without increasing the overall length or increasing the diameter of the shaft cylinder. In addition, a swing-out mechanical pencil that can rotate the core in one direction by moving the chuck and connecting tool back and forth by writing has been realized.

  Hereinafter, based on FIG.1, FIG.2, FIG.3, FIG.4, FIG.5, FIG.6 and FIG. 7, the swing-out type mechanical pencil of Example 1 in this invention is demonstrated. Moreover, let the left side of FIG. 1 be the front, and let the right side be back. First, in FIG.1 and FIG.2, the holding member 1 comprised with soft materials, such as a silicone rubber, is fixed and attached to the front shaft 2. FIG. The slide member 3 is inserted into the front shaft 2 from the front and the fixed piece 4 is inserted from the rear, and the slide member 3 and the fixed piece 4 are press-fitted and fixed. An inner flange 2A of the front shaft 2 is positioned between the rear end of the slide member 3 and the outer stage 4A of the fixed piece 4, and the inner flange 2A of the front shaft 2 is located between the rear end of the slide member 3 and the fixed piece 4. The outer stage 4A is configured to be movable back and forth as appropriate. Further, four key grooves 3A penetrating at equal intervals in the circumferential direction are formed in the front portion of the slide member 3, and the key 2B formed inwardly projecting on the inner surface of the front portion of the front shaft 2 in the key groove 3A. Are engaged, and the slide member 3 and the front shaft 2 are configured to be appropriately movable in the longitudinal direction and not rotatable. Further, a part of the key 2B of the front shaft 2 is configured to protrude inward from the key groove 3A through which the slide member 3 passes.

  The mechanical part of the swing-out mechanical pencil includes a chuck 5 having a head portion 5A divided into several parts, a fastener 6 fitted to the head portion 5A of the chuck 5, a connector 7 fixed to the rear portion of the chuck 5, and a connector. 7 includes a pipe-shaped core tank 8 that is press-fitted and fixed to 7, a connector 9 that receives the fastener 6, and a chuck spring 10 that is attached between the connector 9 and the connector 7 with a load of about 100 g. . Further, a front O-ring 11 made of a soft material such as rubber is attached to the front portion of the core tank 8 in contact with the outer casing 7 A of the connector 7.

  The mechanism portion is inserted from the front of the slide member 3, the rear outer collar 9 </ b> A of the coupling member 9 is inserted through the inner collar 3 </ b> B of the sliding member 3, and the inner collar 3 </ b> B of the sliding member 3 is inserted into the front outer collar 9 </ b> B of the coupling tool 9. And the rear outer casing 9A are rotatably engaged.

  Further, a key groove 12A that is notched and extended from the rear end is formed in the rear portion of the front member 12 at a relative position. Further, a rotating member 14 having a lead guide pipe 13 fixed to the front portion is rotatably incorporated in the tip member 12. A rubber core holder 16 that holds the core 15 with a frictional force of about 50 g is attached to the rotating member 14.

  Next, the rotation mechanism of the core holder 16 will be described. As shown in FIG. 4, the rotating member 14 includes a front cam 14A formed on the rear surface of the front outer casing and a rear cam 14B formed on the front surface of the rear outer casing. The front cam 14A of the rotating member 14 includes a large number of inclined surfaces 14C that are inclined rearward in the right rotation direction, and a vertical surface 14D that is positioned between the inclined surfaces 14C and 14C. Further, the rear cam 14B of the rotating member 14 includes a large number of inclined surfaces 14E that are inclined forward in the right rotation direction, and a vertical surface 14F that is positioned between the inclined surfaces 14E and 14E. Further, a front cam 17A formed on the front end surface and a rear cam 17B formed on the rear stage surface are formed on the inner side of the sliding member 17 as a cam member. The front cam 17A of the sliding member 17 is constituted by a large number of inclined surfaces 17C that are inclined forward in the counterclockwise direction and a vertical surface 17D that is located between the inclined surfaces 17C and 17C. Further, the rear cam 17B of the sliding member 17 includes a large number of inclined surfaces 17E that are inclined backward in the counterclockwise rotation direction, and a vertical surface 17F that is positioned between the inclined surfaces 17E and 17E. Further, the inclined surface 17C of the front cam 17A of the sliding member 17 and the inclined surface 17E of the rear cam 17B are the same number, and the vertical surface 17D of the front cam 17A and the vertical surface 17F of the rear cam 17B are aligned in the longitudinal direction. Further, the inclined surface 14C of the front cam 14A of the rotating member 14 and the inclined surface 14E of the rear cam 14B are the same as the inclined surface 17C of the front cam 17A of the sliding member 17 and the inclined surface 17E of the rear cam 17B. The vertical surface 14F of the rear cam 14B is located substantially at the center of the inclined surface 14C. The inner portion of the sliding member 17 is attached between the front cam 14A and the rear cam 14B of the rotating member 14, and the front cam 14A of the rotating member 14 and the front cam 17A of the sliding member 17 face each other. The rear cam 14B and the rear cam 17B of the sliding member 17 are configured to face each other. Further, the sliding member 17 is configured to be able to move back and forth appropriately in the longitudinal direction with respect to the rotating member 14, and slides with the front cam 14A of the rotating member 14, the front cam 17A of the sliding member 17, and the rear cam 14B of the rotating member 14. The rear cam 17B of the member 17 is configured to be able to abut.

  The rotation mechanism of the lead holder 16 is built in the tip member 12, but a protrusion 17 </ b> G that is locked to the relative position of the sliding member 17 is inserted into the key groove 12 </ b> A of the tip member 12. The sliding member 17 is configured to be movable in the longitudinal direction and not rotatable. Further, the protrusion 17G of the sliding member 17 protrudes outward in the circumferential direction from the rear peripheral surface of the tip member 12. Further, a front spring 18 is attached between the inner stage 12B of the tip member 12 and the outer stage 17H of the sliding member 17, and the sliding member 17 is urged rearward in the longitudinal direction.

  The tip member 12 is detachably screwed to the slide member 3, and a rotating member 14 is rotatably incorporated between the locking step 12C of the tip member 12 and the front end of the connector 9, and a load at the time of installation of 100g. The rear cam 17B of the sliding member 17 urged rearward in the longitudinal direction by the front spring 18 attached to the extent is brought into contact with the rear cam 14B of the rotating member 14, and the protrusion 17G of the sliding member 17 is brought into contact with the front shaft 2. The key 2B is brought into contact. Then, the inner flange 2 </ b> A of the front shaft 2 is brought into contact with the outer stage 4 </ b> A of the fixed piece 4. Further, the rotation mechanism of the lead holder 16 built in the tip member 12 is positioned in front of the chuck 5.

  Further, a cylindrical weight body 19 is inserted from the rear of the front shaft 2, and the weight body 19 is loosely fitted between the outer surface of the core tank 8 and the inner surface of the fixed piece 4 as a guide member so as to be slidable in the longitudinal direction. . The gap between the outer surface of the weight body 19 and the inner surface of the fixed piece 4 is narrower than the gap between the outer surface of the core tank 8 and the inner surface of the weight body 19.

  A clip 21 is integrally formed on the rear shaft 20 and a core 22 is inserted from the front of the rear shaft 20. A rear O-ring 23 made of a soft material such as rubber is press-fitted and fixed to the core 22 at the front end of the inner flange 22A. Further, the pressing member 24 is inserted from the rear of the rear shaft 20, and the locking projection 24 </ b> A of the pressing member 24 is locked to the opening window 22 </ b> B of the core 22, and the front end of the pressing member 24 is connected to the inner flange 22 </ b> A of the core 22. It abuts and connects the core 22 and the pressing member 24. Further, a return spring 25 is attached between the inner flange 20A of the rear shaft 20 and the outer stage 24B of the pressing member 24 with an attachment load of about 300 g, and the pressing member 24 is urged rearward in the longitudinal direction. An inner hole 24 </ b> C is formed in the pressing member 24 so that the core 15 can pass therethrough, and an eraser 26 is attached to the rear inner side of the pressing member 24. In addition, a knob 27 is detachably fitted to the rear outer side of the pressing member 24 so as to cover the eraser 26.

  The rear shaft 20 is detachably screwed to the front shaft 2 and a spare core 15 is housed in the core tank 8 to constitute a swing-out mechanical pencil.

  When writing is performed with the swing-out mechanical pencil, the core 15 is pressed against the paper surface, and as shown in FIG. 5, the chuck 5, the fastener 6, the connector 9, the slide member 3, the fixed piece 4, the tip, Although the member 12 and the rotating member 14 are stopped, the front shaft 2 and the gripping member 1 gripped by the hand with respect to the slide member 3 move forward, and the sliding is performed with the protrusion 17G contacting the key 2B of the front shaft 2. The member 17 moves forward together with the front shaft 2 while compressing the front spring 18. Then, the front cam 17A of the sliding member 17 contacts the front cam 14A of the rotating member 14, and the inclined surface 17C of the front cam 17A of the sliding member 17 contacts the inclined surface 14C of the front cam 14A of the rotating member 14. However, since the projecting portion 17G is inserted into the key groove 12A of the tip member 12 and the sliding member 17 cannot rotate, the inclined surface 14C of the front cam 14A of the rotating member 14 is the front cam of the sliding member 17. By sliding substantially half of the inclined surface 17C of 17A, the rotating member 14 rotates to the right with respect to the front as shown in FIG. When the lead holder 16 attached to the rotary member 14 together with the rotary member 14 rotates to the right, the lead 15 also rotates to the right. At this time, the chuck 5 holding the lead 15 also rotates to the right with respect to the slide member 3 together with the fastener 6 and the connector 9.

  Next, when writing is stopped and the core 15 is separated from the paper surface, the front member 12 and the slide member 3 urged forward by the front spring 18 are moved forward with respect to the front shaft 2 and the gripping member 1 gripped by hand. . Then, together with the slide member 3, the connector 9, the fastener 6, the chuck 5, the rotating member 14, and the lead holder 16 advance together with the lead 15. Then, the inclined surface 14E of the rear cam 14B of the rotating member 14 contacts the inclined surface 17E of the rear cam 17B of the sliding member 17, and the inclined surface 14E of the rear cam 14B of the rotating member 14 is the rear cam 17B of the sliding member 17. As shown in FIG. 7, the rotating member 14 rotates to the right with respect to the front side by sliding substantially half of the inclined surface 17E. Further, the outer stage 4A of the fixed piece 4 comes into contact with the inner flange 2A of the front shaft 2 and returns to the state shown in FIGS. As a result, the inclined surface 14E of the rear cam 14B of the rotating member 14 passes over the inclined surface 17E of the rear cam 17B of the sliding member 17 and comes into contact with the inclined surface 17E on the right side as shown in FIG. 15 rotates to the right by one inclined surface 14E dimension of the rear cam 14B of the rotating member 14. Further, even when the lead 15 being written becomes short and cannot be held by the chuck 5, if the shortened lead 15 is pushed out by the lead 15 held by the chuck 5, writing can be continued, and the shortened lead 15 15 rotates. However, in this case, the chuck 5 does not rotate, and the core 15 held by the chuck 5 does not rotate. The pressing member 24 is separated from the chuck 5, the connector 7 and the lead tank 8, and the gap between the weight body 19 and the lead tank 8 is configured to be larger than the gap between the fixed piece 4 serving as the guide member and the weight body 19. Therefore, there is no possibility that the rotation of the lead tank 8 is hindered by the pressing member 24 and the weight body 19.

  When the core 15 is worn by writing, when the gripping member 1 gripped by hand is shaken, the weight body 19 first moves rearward and contacts the rear O-ring 23. When the gripping member 1 is shaken forward by the reaction, the weight body 19 moves forward and contacts the front O-ring 11. The chuck 5, the connector 7 and the lead tank 8 are moved forward by the inertial force of the weight body 19, and a fixed amount of lead 15 is fed out in the same manner as a conventionally known swing-out mechanical pencil.

  In the case of the swing-out mechanical pencil according to the first embodiment, a mechanism for rotating the rotating member 14 is built in the tip member 12, so that the rear side of the connector 9 has the same structure as that of a normal swing-out mechanical pencil. Thus, there is an advantage that a swing-out mechanical pencil can be easily configured. Further, since the mechanism for rotating the rotating member 14 is built in the tip member 12, there is an advantage that the rotating mechanism and the mechanism portion can be easily assembled. Furthermore, since the core guide pipe 13 that guides the core 15 also rotates together with the core 15, there is no possibility that a frictional force is generated between the core 15 and the core guide pipe 13.

  Hereinafter, based on FIG.8 and FIG.9, the swing-out type mechanical pencil of Example 2 in this invention is demonstrated. In addition, the same member as FIG. 1 attaches | subjects the same code | symbol, and abbreviate | omits the description. First, in FIG. 8, the gripping member 1 made of a soft material is fixedly attached to the front shaft 102. Further, a male screw portion 104B is formed at the rear portion of the fixed piece 104. The slide member 3 is inserted into the front shaft 102 from the front and the fixed piece 104 is inserted from the rear, and the slide member 3 and the fixed piece 104 are press-fitted and fixed. An inner flange 102A of the front shaft 102 is positioned between the rear end of the slide member 3 and the outer stage 104A of the fixed piece 104, and the inner flange 102A of the front shaft 102 is located between the rear end of the slide member 3 and the fixed piece 104. The outer stage 104A is configured to be movable back and forth as appropriate. Further, the key 102B of the front shaft 102 is engaged with the key groove 3A of the slide member 3, so that the slide member 3 and the front shaft 102 can be appropriately moved in the longitudinal direction and cannot be rotated. Further, a part of the key 102 </ b> B of the front shaft 102 is configured to protrude inward from the key groove 3 </ b> A through which the slide member 3 passes. A cylindrical weight body 19 is inserted from the rear of the fixed piece 104, and the weight body 19 is loosely fitted between the outer surface of the core tank 8 and the inner surface of the fixed piece 104 as a guide member so as to be slidable in the longitudinal direction. Note that the gap between the outer surface of the weight body 19 and the inner surface of the fixed piece 104 is narrower than the gap between the outer surface of the core tank 8 and the inner surface of the weight body 19. Further, the rear shaft 20 is detachably threadedly engaged with the male screw portion 104B of the fixed piece 104 to constitute a swing-out type mechanical pencil.

  When writing is performed with the swing-out mechanical pencil, the core 15 is pressed against the paper surface, and as shown in FIG. 9, the chuck 5, the fastener 6, the connecting tool 9, the slide member 3, the fixing piece 104, the rear piece, and the like. The shaft 20, the tip member 12, and the rotating member 14 are stopped, but the front shaft 102 and the gripping member 1 that are gripped by hand with respect to the slide member 3 move forward, and the protrusion 17G touches the key 102B of the front shaft 102. The sliding member 17 in contact with the front shaft 102 moves forward while compressing the front spring 18. Then, the front cam 17A of the sliding member 17 as a cam member contacts the front cam 14A of the rotating member 14, and the inclined surface 17C of the front cam 17A of the sliding member 17 is the inclined surface 14C of the front cam 14A of the rotating member 14. Abut. However, since the projecting portion 17G is inserted into the key groove 12A of the tip member 12 and the sliding member 17 cannot rotate, the inclined surface 14C of the front cam 14A of the rotating member 14 is the front cam of the sliding member 17. The rotary member 14 rotates to the right with respect to the front by slipping about half of the inclined surface 17C of 17A. When the lead holder 16 attached to the rotating member 14 rotates to the right together with the rotating member 14, the lead 15 also rotates to the right. At this time, the chuck 5 holding the lead 15 also rotates to the right with respect to the slide member 3 together with the fastener 6 and the connector 9.

  Next, when writing is stopped and the lead core 15 is separated from the paper surface, the front member 102, the slide member 3, and the fixed piece urged forward by the front spring 18 with respect to the front shaft 102 and the gripping member 1 gripped by hand. 4 and the rear axle 20 move forward. Then, together with the slide member 3, the connector 9, the fastener 6, the chuck 5, the rotating member 14, and the lead holder 16 advance together with the lead 15. Then, the inclined surface 14E of the rear cam 14B of the rotating member 14 contacts the inclined surface 17E of the rear cam 17B of the sliding member 17, and the inclined surface 14E of the rear cam 14B of the rotating member 14 is the rear cam 17B of the sliding member 17. The rotating member 14 rotates to the right with respect to the front by sliding along substantially half of the inclined surface 17E. Further, the outer stage 104A of the fixed piece 104 comes into contact with the inner collar 102A of the front shaft 102 and returns to the state shown in FIG. Then, the inclined surface 14E of the rear cam 14B of the rotating member 14 passes over the inclined surface 17E of the rear cam 17B of the sliding member 17 and comes into contact with the inclined surface 17E adjacent to the right, and the core 15 is connected to the rear surface of the rotating member 14. The cam 14B rotates to the right by the dimension of one inclined surface 14E. Note that the operation of unwinding the lead 15 is performed in the same manner as in the first embodiment.

  In the case of the swing-out type mechanical pencil of the second embodiment, when the pen pressure is applied to the core 15, the front member 12, the slide member 3, and the rear shaft 20 are integrated with the gripping member 1 and the front shaft 102 gripped by hand. Therefore, the sensation that the lead is retracted is less than that in which the lead is retracted in the tip member, and writing becomes easier.

  Hereinafter, based on FIG. 10, FIG. 11, FIG. 12, and FIG. 13, the swing-out mechanical pencil according to the third embodiment of the present invention will be described. The same members as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted. First, in FIG. 10, a rotating member 114 having a lead guide pipe 13 fixed to the front portion is rotatably incorporated in the tip member 12. A rubber core holder 16 that holds the core 15 with a frictional force of about 50 g is attached to the rotating member 114.

  Next, the rotation mechanism of the core holder 16 will be described. A protrusion 114G is formed on the rotating member 114, a front cam 114A is formed on the front surface of the protrusion 114G, and a rear cam 114B is formed on the rear surface of the protrusion 114G. As shown in FIG. 11, the front cam 114A of the rotating member 114 includes a large number of inclined surfaces 114C inclined forward in the right rotation direction, and a vertical surface 114D positioned between the inclined surfaces 114C and 114C. It consists of. The rear cam 114B of the rotating member 114 includes a large number of inclined surfaces 114E that are inclined rearward in the right rotation direction, and a vertical surface 114F that is positioned between the inclined surfaces 114E and 114E. The sliding member 117 as a cam member includes a front cam 117A formed on the rear surface of the front inner flange 117I and a rear cam 117B formed on the front surface of the rear inner flange 117J. The front cam 117A of the sliding member 117 includes a large number of inclined surfaces 117C that are inclined backward in the left rotation direction, and a vertical surface 117D that is located between the inclined surfaces 117C and 117C. In addition, the rear cam 117B of the sliding member 117 is configured by a large number of inclined surfaces 117E that are inclined forward in the counterclockwise direction, and a vertical surface 117F that is positioned between the inclined surfaces 117E and 117E. Further, the inclined surface 117C of the front cam 117A of the sliding member 117 and the inclined surface 117E of the rear cam 117B are the same number, and the vertical surface 117F of the rear cam 117B is located at the approximate center of the inclined surface 117C of the front cam 117A. Further, the inclined surface 114C of the front cam 114A of the rotating member 114 and the inclined surface 114E of the rear cam 114B are the same in number as the inclined surface 117C of the front cam 117A and the inclined surface 117E of the rear cam 117B of the sliding member 117, and the front cam 114A. The vertical surface 114D and the vertical surface 114F of the rear cam 114B are aligned in the longitudinal direction. A protrusion 114G of the rotating member 114 is attached between the front cam 117A and the rear cam 117B of the sliding member 117 so that the front cam 114A of the rotating member 114 and the front cam 117A of the sliding member 117 face each other. The rear cam 114B and the rear cam 117B of the sliding member 117 are configured to face each other. Further, the sliding member 117 is configured to be able to move back and forth appropriately in the longitudinal direction with respect to the rotating member 114, and slides with the front cam 114A of the rotating member 114, the front cam 117A of the sliding member 117, and the rear cam 114B of the rotating member 114. The rear cam 117B of the member 117 is configured to be able to abut.

  The rotation mechanism of the lead holder 16 is built in the tip member 12, but a protrusion 117 </ b> G formed at a relative position of the sliding member 117 is inserted into the keyway 12 </ b> A of the tip member 12, and slides with respect to the tip member 12. The moving member 117 is configured to be movable in the longitudinal direction and not rotatable. Further, the protrusion 117G of the sliding member 117 protrudes outward from the rear surface of the tip member 12. Further, a front spring 18 is attached between the inner stage 12B of the tip member 12 and the outer stage 117H of the sliding member 117, and the sliding member 117 is urged rearward in the longitudinal direction.

  The tip member 12 is detachably screwed to the slide member 3, and a rotating member 114 is rotatably incorporated between the locking step 12 </ b> C of the tip member 12 and the front end of the connector 9. The front cam 117A of the sliding member 117 urged rearward in the longitudinal direction by the front spring 18 attached in step S1 is brought into contact with the front cam 114A of the rotating member 114, and the protrusion 117G of the sliding member 117 is brought into contact with the front shaft 2. It is brought into contact with the key 2B. Then, the inner flange 2 </ b> A of the front shaft 2 is brought into contact with the outer stage 4 </ b> A of the fixed piece 4. Further, a cylindrical weight body 19 is inserted from the rear of the front shaft 2, and the weight body 19 is loosely slidable in the longitudinal direction between the outer surface of the core tank 8 and the inner surface of the fixed piece 4 as a guide member. To do. The gap between the outer surface of the weight body 19 and the inner surface of the fixed piece 4 is made narrower than the gap between the outer surface of the core tank 8 and the inner surface of the weight body 19, thereby forming a swing-out mechanical pencil.

  When writing is performed with the swing-out mechanical pencil, the lead 15 is pressed against the paper surface, and as shown in FIG. 12, the chuck 5, the fastener 6, the connector 9, the slide member 3, the fixed piece 4, the tip, Although the member 12 and the rotating member 114 are stopped, the front shaft 2 and the gripping member 1 that are gripped by hand with respect to the slide member 3 move forward, and the slide 117G contacts the key 2B of the front shaft 2. The member 117 also moves forward together with the front shaft 2 while compressing the front spring 18. Then, the rear cam 117B of the sliding member 117 contacts the rear cam 114B of the rotating member 114, and the inclined surface 117E of the rear cam 117B of the sliding member 117 contacts the inclined surface 114E of the rear cam 114B of the rotating member 114. However, since the projecting portion 117G is inserted into the key groove 12A of the front member 12 and the sliding member 117 is not rotatable, the inclined surface 114E of the rear cam 114B of the rotating member 114 is the rear cam of the sliding member 117. As shown in FIG. 13, the rotating member 114 rotates to the right with respect to the front side by sliding substantially half of the inclined surface 117E of 117B. When the lead holder 16 attached to the rotating member 114 is rotated to the right together with the rotating member 114, the lead 15 is also rotated to the right. At this time, the chuck 5 holding the lead 15 also rotates to the right with respect to the slide member 3 together with the fastener 6 and the connector 9.

  Next, when writing is stopped and the core 15 is separated from the paper surface, the front member 12 and the slide member 3 urged forward by the front spring 18 are moved forward with respect to the front shaft 2 and the gripping member 1 gripped by hand. . Then, together with the slide member 3, the connector 9, the fastener 6, the chuck 5, the rotating member 114, and the lead holder 16 advance together with the lead 15. The inclined surface 114C of the front cam 114A formed on the rotating member 114 abuts on the inclined surface 117C of the front cam 117A formed on the sliding member 117, and the inclined surface 114C of the front cam 114A of the rotating member 114 slides. The rotating member 114 rotates clockwise with respect to the front by sliding along substantially half of the inclined surface 117C of the front cam 117A of the member 117. Further, the outer stage 4A of the fixed piece 4 comes into contact with the inner flange 2A of the front shaft 2 and returns to the state shown in FIG. Then, the inclined surface 114C of the front cam 114A of the rotating member 114 passes over the inclined surface 117C of the front cam 117A of the sliding member 117 and comes into contact with the inclined surface 117C on the right side, and the core 15 is located behind the rotating member 114. The cam 114B rotates to the right by the dimension of one inclined surface 114E. When the chuck 5, the connector 7 and the lead tank 8 are rotated, the lead tank 8 and the pressing member 24 are separated from each other, and the weight body 19 and the lead tank are formed through the gap between the fixed piece 4 as the guide member and the weight member 19. Since the gap 8 is configured to be large, there is no possibility that the rotation of the core tank 8 is hindered by the pressing member 24 and the weight body 19.

  Also in the case of the swing-out mechanical pencil of the fourth embodiment, since a mechanism for rotating the rotary member 114 is built in the tip member 12, the rear side from the connector 9 has the same structure as a normal swing-out mechanical pencil. There is an advantage that a swing-out mechanical pencil can be easily configured. Further, since the tip member 12 incorporates a mechanism for rotating the rotating member 114, there is an advantage that the rotating mechanism and the mechanism portion can be easily assembled.

  Hereinafter, based on FIG.14 and FIG.15, the swing-out type mechanical pencil of Example 4 in this invention is demonstrated. The same members as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted. First, in FIG. 14, a core holder 16 made of rubber or the like that holds the core 15 with a frictional force of about 50 g is attached to the rotating member 214.

  Next, the rotation mechanism of the core holder 16 will be described. A protrusion 214G is formed on the rotating member 214, a front cam 214A is formed on the front surface of the protrusion 214G, and a rear cam 214B is formed on the rear surface of the protrusion 214G. The front cam 214A of the rotating member 214 includes a large number of inclined surfaces that are inclined forward in the right rotation direction, and a vertical surface that is positioned between the inclined surfaces. Further, the rear cam 214B of the rotating member 214 includes a large number of inclined surfaces that are inclined rearward in the right rotation direction, and a vertical surface that is positioned between the inclined surfaces. The front member 112 is formed with a front cam 112D, and the front cam 112D is composed of a large number of inclined surfaces that are inclined rearward in the counterclockwise direction and a vertical surface that is located between the inclined surfaces. Further, a rear cam 28 </ b> A is formed on the inner front surface of the inner piece 28. The rear cam 28A of the inner piece 28 includes a large number of inclined surfaces that are inclined forward in the counterclockwise direction and a vertical surface that is positioned between the inclined surfaces. Further, the inclined surface of the front cam 214A of the rotating member 214 and the inclined surface of the rear cam 214B are the same in number, and the vertical surface of the rear cam 214B is positioned substantially at the center of the inclined surface of the front cam 214A. Further, the inclined surface of the front cam 112D of the front member 112 and the inclined surface of the rear cam 28A of the inner piece 28 are configured in the same number as the inclined surface of the front cam 214A of the rotating member 214 and the inclined surface of the rear cam 214B. The rotating member 214 is built in the tip member 112 so as to be slidable in the longitudinal direction and not rotatable. Further, the positioning projection 28B of the inner piece 28 is inserted into the positioning groove 112E of the tip member 112 for positioning, and the inner piece 28 is press-fitted and fixed to the tip member 112. The tip member 112 and the inner piece 28 constitute a cam member. Further, the vertical surface of the front cam 112D formed on the front member 112 and the vertical surface of the rear cam 28A formed on the inner piece 28 are aligned with each other in the longitudinal direction. The front cam 112D of the front member 112 and the front cam 214A of the rotating member 214 are configured to face each other, and the rear cam 214B of the rotating member 214 and the rear cam 28A of the inner piece 28 are configured to face each other.

  Further, the protrusion 214G of the rotating member 214 is configured to be able to move back and forth appropriately between the front cam 112D of the front member 112 and the rear cam 28A of the inner piece 28 in the longitudinal direction, and the front cam 112D of the front member 112 and the rotating member 214 The front cam 214A, the rear cam 214B of the rotating member 214, and the rear cam 28A of the inner piece 28 are configured to be able to contact each other. Further, a front spring 118 is attached between the inner stage 112B of the tip member 112 and the outer stage 214H of the rotating member 214 with a load of about 100 g, and the rotating member 214 is urged rearward in the longitudinal direction to The cam 214B is brought into contact with the rear cam 28A of the inner piece 28.

  A key groove 112A that is notched and extended from the rear end of the tip member 112 is formed at a relative position, and a protrusion 217G that is formed at a relative position of the sliding member 217 is inserted into the key groove 112A. The sliding member 217 is configured to be movable in the longitudinal direction but not rotatable with respect to 112. Further, the protrusion 217G of the sliding member 217 protrudes outward from the rear surface of the tip member 112.

  The tip member 112 is detachably screwed to the slide member 3 so that the protrusion 217G of the sliding member 217 is brought into contact with the key 2B of the front shaft 2, and the rear end of the rotating member 214 is connected to the front end of the sliding member 217. Is configured to be able to contact. Further, a cylindrical weight body 19 is inserted from the rear of the front shaft 2, and the weight body 19 is loosely slidable in the longitudinal direction between the outer surface of the core tank 8 and the inner surface of the fixed piece 4 as a guide member. To do. The gap between the outer surface of the weight body 19 and the inner surface of the fixed piece 4 is made narrower than the gap between the outer surface of the core tank 8 and the inner surface of the weight body 19, thereby forming a swing-out mechanical pencil.

  When writing is performed with the swing-out mechanical pencil, the core 15 is pushed against the paper surface, and as shown in FIG. 15, the chuck 5, the fastener 6, the connector 9, the slide member 3, the tip member 112, Although the inner piece 28 is stopped, the front shaft 2 and the gripping member 1 gripped by hand with respect to the slide member 3 move forward, and the sliding member 217 in which the protrusion 217G is in contact with the key 2B of the front shaft 2 is also provided. It advances while compressing the front spring 118 together with the front shaft 2. Then, the rear end of the rotating member 214 comes into contact with the front end of the sliding member 217 and is pushed by the sliding member 217 so that the rotating member 214 also moves forward. When the inclined surface of the front cam 214A of the rotating member 214 comes into contact with the inclined surface of the front cam 112D of the leading member 112, the inclined surface of the front cam 214A of the rotating member 214 becomes the inclined surface of the front cam 112D of the leading member 112. The rotating member 214 rotates to the right with respect to the front by slipping about half. When the lead holder 16 attached to the rotating member 214 rotates to the right together with the rotating member 214, the lead 15 also rotates to the right. At this time, the chuck 5 holding the lead 15 also rotates to the right with respect to the slide member 3 together with the fastener 6 and the connector 9.

  Next, when writing is stopped and the core 15 is separated from the paper surface, the tip member 112 and the slide member 3 urged forward by the front spring 118 are moved forward with respect to the front shaft 2 and the gripping member 1 gripped by hand. To do. Then, together with the tip member 112 and the slide member 3, the inner piece 28, the connector 9, the fastener 6, the chuck 5, and the core 15 move forward. However, since the sliding member 217 and the rotating member 214 are stopped together with the gripping member 1 and the front shaft 2, the inclined surface of the rear cam 28A formed on the inner piece 28 is formed on the rotating member 214. The rotating member 214 contacts the inclined surface, the inclined surface of the rear cam 214B of the rotating member 214 slides substantially half of the inclined surface of the rear cam 28A of the inner piece 28, and the rotating member 214 rotates rightward with respect to the front. Further, the outer stage 4A of the fixed piece 4 comes into contact with the inner collar 2A of the front shaft 2 and returns to the state shown in FIG. Then, the inclined surface of the rear cam 214B of the rotating member 214 passes over the inclined surface of the rear cam 28A of the inner piece 28 and contacts the inclined surface on the right, and the core 15 is one of the rear cam 214B of the rotating member 214. Rotate to the right by one ramp dimension.

  Hereinafter, based on FIG.16 and FIG.17, the swing-out type mechanical pencil of Example 5 in this invention is demonstrated. In addition, the same member as FIG. 14 attaches | subjects the same code | symbol, and abbreviate | omits the description. First, referring to FIG. 16, a rotation mechanism for rotating the rotation member 314 will be described. An outer collar 314I is formed on the rotating member 314, and a rear cam 314B is formed on the front surface of the outer collar 314I. The rear cam 314B of the rotating member 314 includes a large number of inclined surfaces that are inclined forward in the right rotation direction, and a vertical surface that is positioned between the inclined surfaces. A front cam member 29 is press-fitted and fixed in front of the rear cam 314B of the rotating member 314. The front cam member 29 is aligned with the concave portion 29 </ b> A of the front cam member 29 by engaging the convex portion 314 </ b> J of the rotating member 314. A front cam 29B is formed on the rear surface of the front cam member 29. The front cam 29B is composed of a large number of inclined surfaces inclined rearward in the right rotation direction and a vertical surface located between the inclined surfaces. Configure. The inclined surface of the front cam 29B of the front cam member 29 and the inclined surface of the rear cam 314B of the rotating member 314 are the same number, and the rear cam 314B of the rotating member 314 is approximately at the center of the inclined surface of the front cam 29B of the front cam member 29. A vertical plane is located. In addition, a front cam 128C is formed on the inner surface of the inner piece 128, and a rear cam 128A is formed on the rear surface of the inner portion. The front cam 128C of the inner piece 128 includes a large number of inclined surfaces that are inclined forward in the counterclockwise direction and a vertical surface that is positioned between the inclined surfaces. Further, the rear cam 128A of the inner piece 128 includes a large number of inclined surfaces that are inclined rearward in the counterclockwise direction and a vertical surface that is located between the inclined surfaces. The inclined surface of the front cam 128C and the inclined surface of the rear cam 128A of the inner piece 128 are the same, and the vertical surface of the front cam 128C and the vertical surface of the rear cam 128A are aligned in the longitudinal direction. In addition, the inclined surface of the front cam 128C of the inner piece 128 and the inclined surface of the rear cam 128A are configured in the same number as the inclined surface of the front cam 29B of the front cam member 29 and the inclined surface of the rear cam 314B of the rotating member 314. Further, the inner part of the inner piece 128 is positioned between the front cam 29B of the front cam member 29 and the rear cam 314B of the rotating member 314, and the front cam 29B of the front cam member 29 and the front cam of the inner piece 128 are configured. 128C is configured to face each other, and the rear cam 128A of the inner piece 128 and the rear cam 314B of the rotating member 314 are configured to face each other. Further, the inner part of the inner piece 128 is configured to be movable back and forth appropriately in the longitudinal direction between the front cam 29B of the front cam member 29 and the rear cam 314B of the rotating member 314. The front cam 128C of the piece 128, the rear cam 128A of the inner piece 128, and the rear cam 314B of the rotating member 314 are configured to contact each other. The inner piece 128 is attached to the tip member 212 by being press-fitted and fixed, and a rotating member 314 is incorporated in the tip member 212 so as to be movable in the longitudinal direction and to be rotatable. The inner piece 128 and the tip member 212 constitute a cam member. Further, a front spring 118 is attached between the inner stage 212B of the front member 212 and the front cam member 29 with a load of about 100 g at the time of attachment, and the rotary member 314 is urged rearward in the longitudinal direction so that the front cam 29B of the front cam member 29 is moved. The inner piece 128 is brought into contact with the front cam 128C.

  The protrusion 217G of the sliding member 217 is inserted into the key groove 212A of the tip member 212, and the sliding member 217 is movable in the longitudinal direction with respect to the tip member 212 and cannot be rotated. Further, the protrusion 217G of the sliding member 217 protrudes outward in the circumferential direction from the rear surface of the tip member 212.

  The tip member 212 is detachably screwed to the slide member 3 so that the protrusion 217G of the sliding member 217 contacts the key 2B of the front shaft 2, and the rear end of the rotating member 314 is attached to the front end of the sliding member 217. Is configured to be able to contact. Further, a cylindrical weight body 19 is inserted from the rear of the front shaft 2, and the weight body 19 is loosely slidable in the longitudinal direction between the outer surface of the core tank 8 and the inner surface of the fixed piece 4 as a guide member. To do. The gap between the outer surface of the weight body 19 and the inner surface of the fixed piece 4 is made narrower than the gap between the outer surface of the core tank 8 and the inner surface of the weight body 19, thereby forming a swing-out mechanical pencil.

  When writing with the swing-out mechanical pencil, as shown in FIG. 17, the core 15 is pushed against the paper surface, and the chuck 5, the fastener 6, the connector 9, the slide member 3, the tip member 212, Although the inner piece 128 is stopped, the front shaft 2 and the gripping member 1 gripped by hand with respect to the slide member 3 move forward, and the sliding member 217 in which the protrusion 217G is in contact with the key 2B of the front shaft 2 is also provided. It advances while compressing the front spring 118 together with the front shaft 2. Then, the rear end of the rotating member 314 comes into contact with the front end of the sliding member 217 and is pushed by the sliding member 217 so that the rotating member 314 moves forward. When the inclined surface of the rear cam 314B of the rotating member 314 comes into contact with the inclined surface of the rear cam 128A of the inner piece 128, the inclined surface of the rear cam 314B of the rotating member 314 corresponds to the inclined surface of the rear cam 128A of the inner piece 128. The rotating member 314 rotates to the right with respect to the front by slipping about half. When the lead holder 16 attached to the rotating member 314 is rotated to the right together with the rotating member 314, the lead 15 is also rotated to the right. At this time, the chuck 5 holding the lead 15 also rotates to the right with respect to the slide member 3 together with the fastener 6 and the connector 9.

  Next, when writing is stopped and the core 15 is separated from the paper surface, the tip member 212 and the slide member 3 urged forward by the front spring 118 are moved forward with respect to the front shaft 2 and the gripping member 1 gripped by hand. . Then, together with the slide member 3, the connector 9, the fastener 6, the chuck 5, and the inner piece 128 move forward together with the core 15. However, since the sliding member 217 and the rotating member 314 are stopped together with the gripping member 1 and the front shaft 2, the inclined surface of the front cam 128C formed on the inner piece 128 is a front cam member 29 provided on the rotating member 314. The front cam 29B abuts the inclined surface of the front cam 29B, the inclined surface of the front cam 29B of the front cam member 29 slides on the inclined surface of the front cam 128C of the inner piece 128, and the front cam member 29 and the rotating member 314 move forward. Turn right. Further, the outer stage 4A of the fixed piece 4 comes into contact with the inner collar 2A of the front shaft 2 and returns to the state shown in FIG. Then, the inclined surface of the front cam 29B of the front cam member 29 passes over the inclined surface of the front cam 128C of the inner piece 128 and comes into contact with the inclined surface on the right side, and the core 15 is in contact with the front cam 29B of the front cam member 29. Rotate to the right by one slope dimension.

  Hereinafter, the swing-out mechanical pencil according to the sixth embodiment of the present invention will be described with reference to FIG. The same members as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted. First, a front cam 414A formed on the rear surface of the front outer collar 414K and a rear cam 414B formed on the front surface of the rear outer collar 414L are formed on the rotating member 414. The front cam 414A of the rotating member 414 includes a large number of inclined surfaces that are inclined rearward in the right rotation direction and a vertical surface that is located between the inclined surfaces. Further, the rear cam 414B of the rotating member 414 is configured by a large number of inclined surfaces and vertical surfaces that are inclined forward in the right rotation direction. Further, the inclined surface of the front cam 414A of the rotating member 414 and the inclined surface of the rear cam 414B are formed in the same number as the inclined surface 17C of the front cam 17A of the sliding member 17 as the cam member. Furthermore, the vertical surface of the rear cam 414B is located at the approximate center of the inclined surface of the front cam 414A of the rotating member 414. The inner portion of the sliding member 17 is attached between the front cam 414A and the rear cam 414B of the rotating member 414, the front cam 414A of the rotating member 414 and the front cam 17A of the sliding member 17 face each other, and the rotating member The rear cam 414B of 414 and the rear cam 17B of the sliding member 17 are configured to face each other. Further, the sliding member 17 is configured to be able to move back and forth appropriately in the longitudinal direction with respect to the rotating member 414, and slides with the front cam 414A of the rotating member 414, the front cam 17A of the sliding member 17, and the rear cam 414B of the rotating member 414. The rear cam 17B of the member 17 is configured to be able to contact.

  Further, a key groove 414M extending from the rear to the front in the longitudinal direction is formed on the inner surface of the rotating member 414 at a relative position. Further, the lead holder 16 is attached to the middle piece 30 having the lead guide pipe 13 fixed to the front part. A key 30 </ b> A is formed at a relative position on the outer surface of the middle piece 30. The middle piece 30 is inserted from the rear of the rotating member 414, and the key 30A of the middle piece 30 is engaged with the key groove 414M of the rotating member 414. It is configured to be slidable in the direction but not rotatable.

  The front member 12 is detachably screwed to the slide member 3, and a rotary member 414 is rotatably incorporated between the front member 12 and the front end of the connector 9, and the front member 12 is attached with a load of about 100g. The protrusion 17G of the sliding member 17 urged rearward in the longitudinal direction by the spring 18 is brought into contact with the key 2B of the front shaft 2. Then, the inner flange 2 </ b> A of the front shaft 2 is brought into contact with the outer stage 4 </ b> A of the fixed piece 4.

  Further, a cylindrical weight body 19 is inserted from the rear of the front shaft 2, and the weight body 19 is loosely slidable in the longitudinal direction between the outer surface of the core tank 8 and the inner surface of the fixed piece 4 as a guide member. To do. The gap between the outer surface of the weight body 19 and the inner surface of the fixed piece 4 is made narrower than the gap between the outer surface of the core tank 8 and the inner surface of the weight body 19, thereby forming a swing-out mechanical pencil.

  Therefore, when the core 15 is pressed against the paper surface and the rotating member 414 rotates rightward with respect to the front, the center piece 30 and the core holder 16 also rotate right, so that the core 15 also rotates right.

  In the case of the sixth embodiment, the core guide pipe 13 can be immersed in the tip member 12 by retracting the middle piece 30 and the core guide pipe 13 during carrying.

  Hereinafter, the swing-out mechanical pencil according to the seventh embodiment of the present invention will be described with reference to FIG. Note that the same members as those in FIG. 2 or FIG. First, a protrusion 514G is formed on the rotating member 514, a front cam 514A is formed on the front surface of the protrusion 514G, and a rear cam 514B is formed on the rear surface of the protrusion 514G. The front cam 514A of the rotating member 514 includes a large number of inclined surfaces that are inclined forward in the right rotation direction, and a vertical surface that is located between the inclined surfaces. Further, the rear cam 514B of the rotating member 514 includes a large number of inclined surfaces that are inclined rearward in the right rotation direction, and a vertical surface that is located between the inclined surfaces. Further, a key groove 514M extending from the rear to the front in the longitudinal direction is formed on the inner surface of the rotating member 514 at a relative position. Further, the lead holder 16 is attached to the middle piece 130 having the lead guide pipe 13 fixed to the front portion. A key 130 </ b> A is formed at a relative position of the middle piece 130. The middle piece 130 is inserted from the rear side of the rotating member 514, and the key 130A of the inner piece 130 is engaged with the key groove 514M of the rotating member 514, whereby the inner piece 130 and the core holder 16 are elongated with respect to the rotating member 514. It is configured to be slidable in the direction but not rotatable. Further, a front spring 118 is attached between the inner step 312B of the leading member 312 and the inner step 514N of the rotating member 514, and the rotating member 514 is urged rearward in the longitudinal direction to move the rear cam 514B of the rotating member 514 to the inner piece 28. The rear cam 28A. The inner piece 28 is press-fitted and fixed to the tip member 312 after the positioning protrusion 28B of the inner piece 28 is inserted into the positioning groove 312E of the tip member 312 and positioned. The tip member 312 and the inner piece 28 constitute a cam member.

  The tip member 312 is removably screwed to the slide member 3 so that the protrusion 217G of the sliding member 217 contacts the key 2B of the front shaft 2, and the rear end of the rotating member 514 is attached to the front end of the sliding member 217. Is configured to be able to contact. Further, a cylindrical weight body 19 is inserted from the rear of the front shaft 2, and the weight body 19 is loosely slidable in the longitudinal direction between the outer surface of the core tank 8 and the inner surface of the fixed piece 4 as a guide member. To do. The gap between the outer surface of the weight body 19 and the inner surface of the fixed piece 4 is made narrower than the gap between the outer surface of the core tank 8 and the inner surface of the weight body 19, thereby forming a swing-out mechanical pencil.

  Accordingly, when the lead 15 is pressed against the paper surface and the rotating member 514 rotates rightward with respect to the front, the core piece 130 and the lead holder 16 also rotate right, so that the lead 15 also rotates right.

  Also in the case of the seventh embodiment, the core guide pipe 13 can be immersed in the tip member 312 by retracting the middle piece 130 and the core guide pipe 13 during carrying.

  Hereinafter, based on FIG.20 and FIG.21, the swing-out type mechanical pencil of Example 8 in this invention is demonstrated. In addition, the same member as FIG. 1 attaches | subjects the same code | symbol, and abbreviate | omits the description. First, the holding member 1 made of a soft material such as silicon rubber is fixedly attached to the front shaft 202. The front shaft 202 is formed with an inner collar 202A in the middle, a key groove 202C extending from the front to the rear is formed facing the front, and a female screw portion 202D is formed in front of the key groove 202C. The

  The mechanical part of the swing-out mechanical pencil includes a chuck 5, a fastener 6, a connector 7, a core tank 8, and a coupler 109 that loosely fits the fastener 6 in the concave groove 109C so as to be movable in the longitudinal direction. The chuck spring 10 is attached between the connector 109 and the connector 7 at a load of about 100 g.

  The mechanism portion is inserted from the front of the slide member 103, and the inner collar 103B of the slide member 103 is rotatably engaged between the front outer collar 109B and the rear outer collar 109A of the connector 109.

  Further, the tip member 412 includes a rotating member 614 fixed with the core guide pipe 13 in a rotatable manner, and a front outer rod 614O of the rotating member 614 is attached to the locking step 412C of the tip member 412 and the tip member 412. It arrange | positions rotatably between the pieces 31. FIG. A rubber core holder 16 that holds the core 15 with a frictional force of about 50 g is attached to the rotating member 614.

  Next, a rotating mechanism for rotating the rotating member 614 will be described. The rotary member 614 includes a front cam 614A formed on the rear surface of the front stage and a rear cam 614B formed on the front surface of the rear stage. The front cam 614A of the rotating member 614 includes a large number of inclined surfaces that are inclined rearward in the right rotation direction, and a vertical surface that is located between the inclined surfaces. Further, the rear cam 614B of the rotating member 614 includes a large number of inclined surfaces that are inclined forward in the right rotation direction, and a vertical surface that is located between the inclined surfaces. Further, a front cam 317A formed on the front end surface and a rear cam 317B formed on the rear end surface are formed inside the sliding member 317 as a cam member. The front cam 317A of the sliding member 317 includes a large number of inclined surfaces that are inclined forward in the left rotation direction, and a vertical surface that is located between the inclined surfaces. Further, the rear cam 317B of the sliding member 317 is configured by a large number of inclined surfaces that are inclined rearward in the counterclockwise direction and a vertical surface that is located between the inclined surfaces. Further, the inclined surface of the front cam 317A and the inclined surface of the rear cam 317B of the sliding member 317 are the same number, and the vertical surface of the front cam 317A and the vertical surface of the rear cam 317B are aligned in the longitudinal direction. Further, the inclined surface of the front cam 614A and the inclined surface of the rear cam 614B of the rotating member 614 are the same in number as the inclined surface of the front cam 317A and the inclined surface of the rear cam 317B of the sliding member 317, and also the inclined surface of the front cam 614A. The vertical surface of the rear cam 614B is located substantially at the center. The inner part of the sliding member 317 is attached between the front cam 614A and the rear cam 614B of the rotating member 614, the front cam 614A of the rotating member 614 and the front cam 317A of the sliding member 317 are faced, and the rotating member 614 The rear cam 614B and the rear cam 317B of the sliding member 317 are configured to face each other. Further, the sliding member 317 is configured to be able to move back and forth appropriately in the longitudinal direction with respect to the rotating member 614, and slides with the front cam 614A of the rotating member 614, the front cam 317A of the sliding member 317, and the rear cam 614B of the rotating member 614. The rear cam 317B of the member 317 is configured to be able to contact.

  The rotating member 614 is incorporated in the tip member 412, and a front outer rod 614 O of the rotating member 614 is disposed between the locking step 412 C of the tip member 412 and the piece 31 press-fitted and fixed to the tip member 412. On the other hand, the rotating member 614 is attached so as to be rotatable and immovable in the longitudinal direction.

  Further, the sliding member 317 of the rotating mechanism is press-fitted and fixed to the slide member 103, and the sliding member 317 and the slide member 103 are connected so as not to rotate.

  In order to attach the rotation mechanism to the front shaft 202, first, the buffer spring 32 is inserted into the front shaft 202 from the front, and then the slide member 103 assembled with the front member 412, the sliding member 317, and the rotation member 614 is moved to the front shaft. 202, the key 317K of the sliding member 317 is inserted into the key groove 202C of the front shaft 202, and the male screw portion 412F of the tip member 412 is detachably screwed into the female screw portion 202D of the front shaft 202. To do. Further, the buffer spring 32 is attached between the rear end of the slide member 103 and the inner flange 202A of the front shaft 202 with an attachment load of about 150 g.

  Further, a cylindrical weight body 19 is inserted from the rear of the front shaft 202 as a guide member, and the weight body 19 is loosely fitted between the outer surface of the core tank 8 and the inner surface of the front shaft 202 so as to be slidable in the longitudinal direction. To do. The gap between the outer surface of the weight body 19 and the inner surface of the front shaft 202 is narrower than the gap between the outer surface of the core tank 8 and the inner surface of the weight body 19. The rear shaft 20 is detachably screwed to the rear portion of the front shaft 202 to constitute a swing-out mechanical pencil.

  When writing is performed with the swing-out type mechanical pencil of the eighth embodiment, the lead 15 is pushed against the paper surface, the chuck 5, receiving the writing pressure, the fastener 6, the connecting tool 109, and the slide member 103 are retracted to compress the buffer spring 32. . Then, the sliding member 317 fixed to the slide member 103 also moves backward, and the inclined surface of the rear cam 317B of the sliding member 317 contacts the inclined surface of the rear cam 614B of the rotating member 614. However, since the key 317K is inserted into the key groove 202C of the front shaft 202 and the sliding member 317 cannot rotate with respect to the front shaft 202, the inclined surface of the rear cam 614B of the rotating member 614 is the sliding member 317. The rotating member 614 rotates clockwise with respect to the front by sliding along substantially half of the inclined surface of the rear cam 317B. When the lead holder 16 attached to the rotary member 614 together with the rotary member 614 rotates to the right, the lead 15 also rotates to the right. At this time, the chuck 5 holding the lead 15 also rotates to the right with respect to the slide member 103 together with the fastener 6 and the connecting tool 109.

  Next, when writing is stopped and the core 15 is separated from the paper surface, the slide member 103 urged forward by the buffer spring 32 moves forward. Then, together with the slide member 103, the connector 109, the fastener 6, the chuck 5, and the sliding member 317 move forward. The inclined surface of the front cam 317A of the sliding member 317 contacts the inclined surface of the front cam 614A of the rotating member 614, and the inclined surface of the front cam 614A of the rotating member 614 is inclined to the inclined surface of the front cam 317A of the sliding member 317. The rotating member 614 rotates to the right with respect to the front. Then, the inclined surface of the front cam 614A of the rotating member 614 passes over one inclined surface of the front cam 317A of the sliding member 317 and comes into contact with the inclined surface on the right side, and the core 15 of the front cam 614A of the rotating member 614 is contacted. Rotate to the right by one ramp dimension.

  Hereinafter, based on FIG.22 and FIG.23, the swing-out type mechanical pencil of Example 9 in this invention is demonstrated. In addition, the same member as FIG. 18 attaches | subjects the same code | symbol, and abbreviate | omits the description. First, the tip member 512 is made of a transparent or colored synthetic resin, and the surface is printed with a satin finish or opaque ink or transferred, and a part of the window 512G is transparent. Form. Further, a key groove 512A that is cut out from the rear end and extends at the rear portion of the front member 512 is formed at a relative position. Further, the display member 33 is press-fitted and attached to the rotating member 414. The display member 33 is provided with a display 33A so that the rotation of the core 15 can be visually observed. The display 33A of the display member 33 is configured by printing, transferring, sealing, or the like. Although not shown, the display member may be integrated with the rotating member.

  The rotating member 414 is built in the tip member 512, and the protrusion 17G of the sliding member 17 as a cam member is inserted into the key groove 512A of the tip member 512. Then, the tip member 512 is removably screwed to the slide member 3 and attached. Then, the display 33 </ b> A formed on the display member 33 can be viewed from the window portion 512 </ b> G of the tip member 512. Therefore, the state in which the rotating member 414 rotates can be always visually observed from the window portion 512G of the tip member 512.

  In addition, it is preferable to form the window part 512G of the tip member 512 in a circumferential shape or in a plurality at equal intervals in the circumferential direction.

  In the case of the swing-out type mechanical pencil of the ninth embodiment, the display 33A indicating the rotation of the core 15 can be viewed through the window 512G of the tip member 512, and the advantage that the display 33A can be easily viewed during writing is obtained.

  Hereinafter, based on FIG.24 and FIG.25, the swing-out type mechanical pencil of Example 10 in this invention is demonstrated. In addition, the same member as FIG. 22 attaches | subjects the same code | symbol, and abbreviate | omits the description. First, the tip member 612 is made of a transparent or colored synthetic resin having transparency, and a male screw portion 612H is formed on the rear surface portion. On the surface of the tip member 612, printing or transfer is performed with opaque ink, and a transparent window portion is formed in a part thereof. Further, a key groove 612A that is notched and extended from the rear end is formed at the rear portion of the front member 612 at a relative position. Further, the lock member 34 is formed by forming a female screw portion 34A and extending the locking portion 34B rearward. The lock member 34 is screwed to the tip member 612 so as to be movable in the longitudinal direction. Moreover, the locking portion 34B of the lock member 34 is configured to be able to contact the front end of the front shaft 2. Normally, the engaging portion 34B of the lock member 34 and the front end of the front shaft 2 are appropriately separated from each other. If the state shown in FIG. It is movable in the longitudinal direction. Therefore, in this state, the rotating mechanism of the rotating member 414 works, and the core 15 rotates when writing is performed.

  Further, when it is desired to stop the rotation of the core 15, the lock member 34 is rotated and retracted, and the locking portion 34B is brought into contact with the front shaft 2 to be in the state shown in FIG. Then, the front shaft 2 cannot move in the longitudinal direction with respect to the tip member 612 and the slide member 3, and the core 15 does not rotate even if writing is performed.

  In the case of the tenth embodiment, the state in which the lead 15 rotates and the state in which the lead 15 does not rotate can be selected according to the purpose of use by the user, and the rotation of the lead 15 can be confirmed from the window of the tip member 612. There is an advantage that it is possible to naturally determine whether the core 15 is rotating or not.

  Hereinafter, based on FIG. 26, FIG. 27, FIG. 28 and FIG. 29, the swing-out mechanical pencil of Example 11 in the present invention will be described. The same members as those in FIG. 24 are denoted by the same reference numerals, and the description thereof is omitted. First, the tip member 712 is made of a transparent or colored synthetic resin having transparency, and the rear surface portion 712I is raised, and a protruding portion 712J extending in the circumferential direction is formed on the rear surface portion 712I. On the surface of the tip member 712, printing or transfer is performed with opaque ink, and a transparent window portion is formed in a part thereof. Further, a key groove 712A that is cut out from the rear end and extends at the rear portion of the front member 712 is formed at a relative position. Further, a concave portion 134C extending in the circumferential direction is formed on the inner surface of the lock member 134, and a cam portion 134D extending rearward is formed at a relative position. The cam portion 134D is formed with a locking portion 134B and a stopper portion 134E extending further rearward than the locking portion 134B. Further, the cam portion 302E of the front shaft 302 is formed with a concave portion 302F that is notched rearward at a relative position. The concave portion 134C of the lock member 134 is rotatably attached to the protruding portion 712J of the tip member 712. Further, if the cam portion 134D of the lock member 134 is aligned with the recess 302F of the front shaft 302 and is in the state shown in FIGS. 26 and 27, the cam portion 134D of the lock member 134 and the cam portion 302E of the front shaft 302 are appropriately separated from each other. Thus, the front shaft 302 can move in the longitudinal direction with respect to the tip member 712 and the slide member 3. Therefore, in this state, the rotating mechanism of the rotating member 414 works, and the core 15 rotates when writing is performed.

  Further, when it is desired to stop the rotation of the core 15, if the lock member 134 is rotated to the right with respect to the front, the edge of the recess 302 </ b> F formed by the stopper portion 134 </ b> E of the lock member 134 on the cam portion 302 </ b> E of the front shaft 302. The lock member 134 stops rotating by coming into contact with 302G, and the locking portion 134B of the lock member 134 contacts the cam portion 302E of the front shaft 302, resulting in the state shown in FIGS. In this state, the front shaft 302 cannot move forward in the longitudinal direction with respect to the tip member 712 and the slide member 3, and the core 15 does not rotate even if writing is performed.

  Also in the case of Example 11, the state in which the lead 15 rotates and the state in which the lead 15 does not rotate can be selected depending on the purpose of use, and the rotation of the lead 15 can be confirmed from the window portion of the tip member 712. There is an advantage that it is possible to determine naturally whether 15 is rotating or not.

  Hereinafter, based on FIG.30 and FIG.31, the swing-out type mechanical pencil of Example 12 in this invention is demonstrated. In addition, the same member as FIG. 1 attaches | subjects the same code | symbol, and abbreviate | omits the description. First, the gripping member 1 made of a soft material is fixedly attached to the front shaft 402. Further, a female screw portion 402H is formed at the rear portion of the front shaft 402. Further, the male screw portion 234F is formed at the front portion of the lock member 234, and the rear portion 234G is formed with a large diameter. The male screw portion 234F of the lock member 234 is screwed to the female screw portion 402H of the front shaft 402 so as to be movable in the longitudinal direction, and the rear portion 234G of the lock member 234 is attached to the outer flange 204C of the fixing piece 204 as a guide member. Covered and configured. A cylindrical weight body 19 is inserted from the rear of the fixed piece 204, and the weight body 19 is loosely fitted between the outer surface of the core tank 8 and the inner surface of the fixed piece 204 so as to be slidable in the longitudinal direction. The gap between the outer surface of the weight body 19 and the inner surface of the fixed piece 204 is narrower than the gap between the outer surface of the core tank 8 and the inner surface of the weight body 19. The rear shaft 20 is detachably screwed to the rear portion of the fixed piece 204 to constitute a swing-out mechanical pencil. In the state shown in FIG. 30, the sliding member 17 as a cam member is configured to be movable in the longitudinal direction with respect to the tip member 12. Therefore, in this state, the rotating mechanism of the rotating member 14 works, and the core 15 rotates when writing is performed.

  When it is desired to stop the rotation of the core 15, the lock member 234 is rotated to move the front shaft 402 forward in the longitudinal direction. Then, the state shown in FIG. 31 is obtained, the slide member 17 is moved forward by being pushed by the key 402B of the front shaft 402, and the protrusion 17G of the slide member 17 is formed on the front end edge of the key groove 12A of the tip member 12. Abut. In this state, the front shaft 402 and the sliding member 17 cannot reciprocate in the longitudinal direction with respect to the tip member 12 and the slide member 3, and the core 15 does not rotate even if writing is performed.

  In the case of the twelfth embodiment, since the lock member 234 does not hit the finger during writing, the possibility of malfunctioning is reduced. Although not shown, a display member for displaying the rotation of the core 15 can also be attached in the thirteenth embodiment.

  Hereafter, based on FIG. 32, the swing-out type mechanical pencil of Example 13 in this invention is demonstrated. In addition, the same member as FIG. 1 attaches | subjects the same code | symbol, and abbreviate | omits the description. First, the shock absorbing spring 32 having a load of about 150 g is attached between the rear end of the slide member 203 and the inner flange 2A of the front shaft 2. The load when the buffer spring 32 is attached is configured to be stronger than the load when the front spring 18 is attached. Further, the fixed piece 304 is press-fitted and fixed to the slide member 203, and the outer stage 304 </ b> A of the fixed piece 304 is brought into contact with the inner flange 2 </ b> A of the front shaft 2. A cylindrical weight body 19 is inserted from the rear of the fixed piece 304, and the weight body 19 is loosely fitted between the outer surface of the core tank 8 and the inner surface of the fixed piece 304 so as to be slidable in the longitudinal direction. In addition, a swing-out type mechanical pencil is configured by forming a gap between the outer surface of the weight body 19 and the inner surface of the fixed piece 304 narrower than the gap between the outer surface of the core tank 8 and the inner surface of the weight body 19.

  When writing is performed with the swing-out mechanical pencil, the chuck 5, the fastener 6, the coupling tool 9, the slide member 203, the fixing piece 304, the tip member 12, and the rotating member 14 that receive the writing pressure are pressed against the paper 15. Although stopped, the front shaft 2 and the gripping member 1 gripped by hand with respect to the slide member 203 move forward while compressing the buffer spring 32, and the cam member in which the protrusion 17G is in contact with the key 2B of the front shaft 2 The sliding member 17 also moves forward together with the front shaft 2 while compressing the front spring 18. The rotating member 14 is rotated by the reciprocating motion of the sliding member 17.

  Therefore, when the front shaft 2 and the gripping member 1 gripped by the hand by the core 15 receiving the writing pressure are advanced, the front shaft 2 and the gripping member 1 can be moved gently by the buffer spring 32 during writing. There is an advantage that the hindrance to writing caused by the rocking can be alleviated.

  Hereinafter, based on FIG. 33, FIG. 34 and FIG. 35, the swing-out type mechanical pencil of Example 14 in the present invention will be described. The same members as those in FIG. 32 are denoted by the same reference numerals, and the description thereof is omitted. First, a shock-absorbing member 35 made of a soft material such as rubber or low-rebound foam is attached between the rear end of the slide member 203 and the inner flange 2A of the front shaft 2 with a load of about 150 g. The buffer member 35 is formed in a cylindrical shape, and a plurality of protrusions 35A protruding rearward in the longitudinal direction are formed at regular intervals in the circumferential direction. Further, the load at the time of mounting the buffer member 35 is configured to be stronger than the load at the time of mounting the front spring 18. The fixed piece 304 is press-fitted and fixed to the slide member 203, and the outer stage 304A of the fixed piece 304 is brought into contact with the inner flange 2A of the front shaft 2. A cylindrical weight body 19 is inserted from the rear of the fixed piece 304, and the weight body 19 is loosely fitted between the outer surface of the core tank 8 and the inner surface of the fixed piece 304 so as to be slidable in the longitudinal direction. In addition, a swing-out type mechanical pencil is configured by forming a gap between the outer surface of the weight body 19 and the inner surface of the fixed piece 304 narrower than the gap between the outer surface of the core tank 8 and the inner surface of the weight body 19.

  When writing is performed with the swing-out mechanical pencil, the core 15 is pressed against the paper surface, and the chuck 5, the fastener 6, the connecting tool 9, the slide member 203, the fixed piece 304, the tip member 12, and the rotating member 14 that receive the writing are stopped. However, the front shaft 2 and the gripping member 1 gripped by hand with respect to the slide member 203 move forward while compressing the buffer member 35, and the cam 17 is a cam member in which the protrusion 17 </ b> G contacts the key 2 </ b> B of the front shaft 2. The sliding member 17 moves forward together with the front shaft 2 while compressing the front spring 18. The rotating member 14 is rotated by the reciprocating motion of the sliding member 17.

  Therefore, when the front shaft 2 and the gripping member 1 gripped by the hand by receiving the writing pressure of the core 15 are advanced, the front shaft 2 and the gripping member 1 can be gently moved by the buffer member 35 during writing. There is an advantage that the hindrance to writing caused by the rocking can be alleviated.

  Hereinafter, based on FIG. 36, FIG. 37 and FIG. 38, the swing-out mechanical pencil of Example 15 in the present invention will be described. In addition, the same member as FIG. 14 attaches | subjects the same code | symbol, and abbreviate | omits the description. First, the mechanism portion is inserted from the front of the slide member 303, the rear outer collar 9 </ b> A of the coupling tool 9 is inserted into the inner collar 303 </ b> B of the slide member 303, and the inner collar 303 </ b> B of the slide member 303 is inserted into the front outer collar of the coupling tool 9. 9B and the rear outer casing 9A are rotatably engaged. A male screw portion 303C is formed at the front portion of the slide member 303, and a cylindrical weight body 19 is inserted from the rear of the slide member 303. The weight body 19 is inserted into the outer surface of the core tank 8 and the inner surface of the slide member 303. And slidably fit in the longitudinal direction. The gap between the outer surface of the weight body 19 and the inner surface of the slide member 303 is narrower than the gap between the outer surface of the core tank 8 and the inner surface of the weight body 19. Further, although not shown, the rear shaft is detachably screwed to the rear portion of the slide member 303.

  The front shaft 502 is formed with a male screw portion 502I and an outer flange 502J at the front, and a piece 502K extending in the longitudinal direction rearward from the outer flange 502J is formed at a relative position. Further, a female screw portion 502H is formed on the piece 502K. The sliding member 417 has an outer flange 417L formed at the rear, and a semicircular through hole 417M is formed at the left and right target positions in the outer flange 417L.

  The piece 502K of the front shaft 502 is inserted into the through hole 417M of the sliding member 417, and the sliding member 417 is slidable in the longitudinal direction with respect to the front shaft 502 and is attached so as not to rotate. Further, the male screw portion 303C of the slide member 303 is detachably screwed and attached to the female screw portion 502H formed on the piece 502K of the front shaft 502. A concave groove 417N is formed on the surface of the outer flange 417L of the sliding member 417. Further, a front inner collar 101A is formed on the inner surface of the front portion of the gripping member 101 made of a soft material such as silicon rubber or a hard material such as synthetic resin. The front inner flange 101A of the gripping member 101 is locked by being press-fitted and fixed in a concave groove 417N formed on the surface of the outer flange 417L of the sliding member 417, and the sliding member 417 and the gripping member 101 are connected. Construct a swing-out mechanical pencil.

  When writing is performed with the swing-out mechanical pencil, the chuck 5, the fastener 6, the connector 9, the slide member 303, the tip member 812, the front shaft 502, and the inner piece 28 are stopped when the core 15 is pressed against the paper surface and receives writing pressure. However, the gripping member 101 gripped by hand with respect to the slide member 303 advances, and the sliding member 417 connected to the gripping member 101 also advances. Then, it is pushed by the sliding member 417 and the rotating member 214 advances while compressing the front spring 118. When the inclined surface of the front cam 214A of the rotating member 214 comes into contact with the inclined surface of the front cam 812D of the leading member 812, the inclined surface of the front cam 214A of the rotating member 214 corresponds to the inclined surface of the front cam 812D of the leading member 812. The rotating member 214 rotates to the right with respect to the front by slipping about half. When the lead holder 16 attached to the rotating member 214 rotates to the right together with the rotating member 214, the lead 15 also rotates to the right. At this time, the chuck 5 holding the core 15 also rotates to the right with respect to the slide member 303 together with the fastener 6 and the connector 9.

  Next, when writing is stopped and the core 15 is separated from the paper surface, the tip member 812, the front shaft 402, and the slide member 203, which are urged forward by the front spring 118, move forward with respect to the grip member 101 gripped by hand. . Then, the inner piece 28, the connector 9, the fastener 6, and the chuck 5 move forward together with the core 15 together with the tip member 812, the front shaft 502 and the slide member 303. However, since the sliding member 417 and the rotating member 214 are stopped together with the gripping member 101, the inclined surface of the rear cam 28A formed on the inner piece 28 contacts the inclined surface of the rear cam 214B formed on the rotating member 214. In contact with each other, the inclined surface of the rear cam 214B of the rotating member 214 slides substantially half of the inclined surface of the rear cam 28A of the inner piece 28, and the rotating member 214 rotates rightward with respect to the front. Further, the outer stage 303D of the slide member 303 comes into contact with the rear end of the gripping member 101 and returns to the state shown in FIG. Then, the inclined surface of the rear cam 214B of the rotating member 214 passes over the inclined surface of the rear cam 28A of the inner piece 28 and contacts the inclined surface on the right, and the core 15 is one of the rear cam 214B of the rotating member 214. Rotate to the right by one ramp dimension.

  In the case of the fifteenth embodiment, the tip member 812 and the inner piece 28 constitute a cam member. In addition, since the sliding member 417 is fixed to the gripping member 101, there is no fear that the members built in the front member 812 and the front shaft 502 or the front shaft 502 and the slide member 303 will be detached from each other. In addition, the assemblability is also improved.

  Hereinafter, based on FIG. 39, the swing-out type mechanical pencil of Example 16 in this invention is demonstrated. In addition, the same member as FIG. 1 attaches | subjects the same code | symbol, and abbreviate | omits the description. First, the slide member 3 is inserted from the front of the holding member 201 made of synthetic resin, and the fixed piece 4 is inserted from the rear, and the slide member 3 and the fixed piece 4 are press-fitted and fixed. The inner collar 201B of the gripping member 201 is positioned between the rear end of the slide member 3 and the outer stage 4A of the fixed piece 4, and the inner collar 201B of the gripping member 201 is located between the rear end of the slide member 3 and the fixed piece 4. The outer stage 4A is configured to be movable back and forth as appropriate. Further, the key 201C of the gripping member 201 is engaged with the key groove 3A of the slide member 3, and the slide member 3 and the gripping member 201 are configured to be appropriately movable in the longitudinal direction and not rotatable. Further, a part of the key 201 </ b> C of the gripping member 201 is configured to protrude inward from the key groove 3 </ b> A through which the slide member 3 penetrates. Further, the protrusion 17G of the sliding member 17 as a cam member urged rearward in the longitudinal direction by the front spring 18 is brought into contact with the key 201C of the gripping member 201. Further, a cylindrical weight body 19 is inserted from the rear of the fixed piece 4, and the weight body 19 is loosely fitted between the outer surface of the core tank 8 and the inner surface of the fixed piece 4 so as to be slidable in the longitudinal direction. The gap between the outer surface of the weight body 19 and the inner surface of the fixed piece 4 is narrower than the gap between the outer surface of the core tank 8 and the inner surface of the weight body 19. The rear shaft 20 is detachably screwed to the gripping member 201 to constitute a swing-out mechanical pencil.

  The means for rotating the lead 15 by writing is performed in the same manner as in the first embodiment.

  Hereinafter, the swing-out mechanical pencil according to the seventeenth embodiment of the present invention will be described with reference to FIG. In addition, the same member as FIG. 18 attaches | subjects the same code | symbol, and abbreviate | omits the description. First, the lead holder 116 is attached in the lead guide pipe 113, and the lead guide pipe 113 is fixed to the front portion of the middle piece 230. A key 230 </ b> A is formed at a relative position on the outer surface of the middle piece 230. The intermediate piece 230 is inserted from the rear of the rotating member 414, and the key 230A of the intermediate piece 230 is engaged with the key groove 414M of the rotating member 414, whereby the intermediate piece 230, the core guide pipe 113, and the rotating member 414 are engaged. The lead holder 116 is configured to be slidable in the longitudinal direction but not rotatable. Although the tip member 912 will not be described in detail, the tip hole 912K is slightly thickened so that the thick core guide pipe 113 can be inserted, but the rest is the same as the tip member 12.

  Accordingly, when the core 15 is pressed against the paper surface and the rotating member 414 rotates rightward with respect to the front, the core piece 230, the core guide pipe 113, and the core holder 116 also rotate to the right, so the core 15 also rotates to the right.

  In the case of the seventeenth embodiment, since the lead holder 116 is disposed close to the tip of the lead guide pipe 113, the lead 15 discharged as a remaining lead is very short and economical.

  In addition, this invention is not limited to the said Example, In order to simplify description, members, such as a holding member, a front shaft, a tip member, a slide member, a fixed piece, a rotation member, a sliding member, and a connection tool. However, it is only necessary to integrate two or more members by screwing, press-fitting, or the like. Moreover, the core holder attached to the rotating member, the middle piece, and the core guide pipe is not limited to rubber, but a metal plate is formed in a cylindrical shape, and an elastic portion is formed in a part thereof, or the core holder is rotated. An elastic part may be formed on a part of the member, the middle piece, the core guide pipe, or the like to be integrated. Further, in the above embodiment, either the rotating member or the cam member is configured such that the vertical surface of the rear cam is positioned substantially at the center of the inclined surface of the front cam. This is for the sake of clarity. The present invention is not limited to the above-described embodiment, and when the inclined surfaces of the front cams that contact each other come in contact with each other, the contact surfaces of the rear cams that can contact each other are separated and inclined. It is only necessary that the front cam is inclined and the inclined surface of the rear cam is inclined in the opposite direction with respect to the circumferential direction.

  The core can be drawn out by the inertial force of the heavy body, the core can be rotated in one direction by the back and forth movement of the chuck and connecting tool by writing, the total length does not become long, and the shaft cylinder does not become thicker Applicable to mechanical pencils.

DESCRIPTION OF SYMBOLS 1 Holding member 3 Slide member 5 Chuck 6 Fastening tool 8 Core tank 9 Connecting tool 14 Rotating member 14A Front cam of rotating member 14B Rear cam of rotating member 14 15 Core 16 Core holder 19 Weight body 101 Holding member 103 Slide member 109 Connection Tool 114 Rotating member 114A Front cam of rotating member 114 114B Rear cam of rotating member 114 116 Core holder 201 Holding member 203 Slide member 214 Rotating member 214A Front cam of rotating member 214 214B Rear cam of rotating member 214 303 Slide member 314 Rotating member 314B Rotating member 314 rear cam 414 Rotating member 414A Rotating member 414 front cam 414B Rotating member 414 rear cam 514 Rotating member 514A Rotating member 514 front cam 514B Rotating member 514 rear cam 614 Rotating member 61 Cam after the front cam 614B rotating member 614 of the A rotary member 614

Claims (1)

  This is a swing-out mechanical pencil that moves the chuck forward by the forward movement of the chuck and connecting tool by writing and moving the core in one direction by moving the chuck forward by the inertial force of the heavy body, and connects the core tank to the rear part of the chuck. The weight body is provided on the outside of the core tank so as to be slidable in the longitudinal direction, and the fastener pressed backward in the longitudinal direction by the chuck is received by the connector, so that the connector can be rotated with respect to the slide member. The slide member can be moved in the longitudinal direction with respect to the gripping member and cannot be rotated, and a cam member is configured in front of the slide member so as not to rotate with respect to the slide member. A front cam and a rear cam are formed on the member, and a front cam and a rear cam are formed on the rotating member, and the front cam of the cam member and the front cam of the rotating member are configured to contact each other. In addition, the rear cam of the cam member and the rear cam of the rotating member are configured to be able to contact each other, and the slide member moves back and forth in conjunction with the back and forth movement of the chuck and the connecting tool by writing, whereby the cam member and the rotating member When the front cam of the cam member, the front cam of the rotating member, the rear cam of the cam member, and the rear cam of the rotating member come in contact with each other back and forth, the rotating member rotates in one direction. A swing-out mechanical pencil that rotates the lead holder by a predetermined angle in conjunction with the lead and rotates the lead held by the lead holder with an appropriate force as the lead holder rotates.

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