JP5840375B2 - mechanical pencil - Google Patents

Description

  The present invention relates to a mechanical pencil in which a lead holder rotates in one direction by a reciprocating movement of a tip member caused by writing pressure, and the lead and chuck are rotated as the lead holder rotates.

In general, writing instruments are written with a slight tilt, but when writing with a mechanical pencil tilted, the lead is reduced by one piece, so 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 eliminate this point, an opening groove is formed in the inner shaft, and one side wall of the opening groove is largely inclined at the front part and formed substantially perpendicular to the rear part, and the other side wall is substantially the same. In addition to forming a protrusion that is engaged with the opening groove on the coupling tool, a locking claw is formed at the rear end of the coupling tool, and the coupling tool is provided so as to be rotatable with respect to the inner shaft. A number of cam teeth are formed in the circumferential direction at the front end of the rotating member, the chuck is configured to be slidable in the longitudinal direction with respect to the rotating member and cannot be rotated, and a return spring is provided between the coupling tool and the rotating member. The rotating member is stretched, and the rotating member is urged forward in the longitudinal direction by a spring having a larger mounting load than the return spring to press the rotating member against the inner shaft. The cam teeth are separated from each other as appropriate, and the pen pressure is applied to the core. As a result, the protrusion of the connecting tool connecting the core guide member moves backward along the right side wall of the inner shaft while rotating counterclockwise, and when the locking claw of the connecting tool comes into contact with the cam teeth of the rotating member, the rotating member is moved together with the connecting tool. There is also known a mechanical pencil that rotates counterclockwise and the chuck and the core rotate counterclockwise by a certain amount together with the rotating member. (See Patent Document 1)

  However, in the above mechanical pencil, since the lead, chuck and lead guide member reciprocate simultaneously in the shaft tube and the tip member, the movement of the lead is directly transmitted to the hand holding the shaft tube and is very difficult to write. It was. In addition, when writing pressure is applied to the lead, the lead guide member protruding from the tip member and the retreat of the lead enter the eyes, resulting in discomfort.

JP 2010-36391 A

  The problem to be solved is that the core, the chuck and the core guide member reciprocate simultaneously in the shaft cylinder and the tip member, so that the movement of the core is directly transmitted to the hand holding the shaft cylinder, and the writing is difficult. The movement of the core and the core guide member protruding from the tip member enters the eyes, causing discomfort.

The present invention
“1. It has a front shaft and a rear shaft, a gripping member is fixedly attached to the front shaft, a chuck for holding a core is arranged inside the front shaft, and a fastener is attached to the head of the chuck. Fits, urges the chuck backward in the longitudinal direction by a chuck spring, and can rotate a connecting member that receives the fastener pressed by the chuck with respect to a slide member that can be appropriately moved in the longitudinal direction within the front shaft. When the writing is performed by connecting the tip member to the slide member and the writing is performed with the core pressed against the paper surface, the slide member is held by hand against the slide member that stops moving forward. When the gripping member moves forward and the core is separated from the paper surface, the slide member moves forward with respect to the gripping member gripped by hand, and a front cam and a rear cam are connected to the tip member connected to the slide member. The sliding member formed in the longitudinal direction A rotating member that is movable and is non-rotatably built in, and a rotating member having a front cam and a rear cam formed on the tip member is rotatably incorporated, and the front cam of the rotating member, the front cam of the sliding member, and the rotation The rear member of the member and the rear member of the sliding member are configured to be able to contact each other, a core holder for holding the core is attached to the rotating member, and the sliding member is connected to the leading member connected to the sliding member by writing Are moved back and forth in the longitudinal direction so that the front cam of the rotating member, the front cam of the sliding member, the rear cam of the rotating member, and the rear cam of the sliding member come into contact with each other so that the rotating member moves in one direction. A mechanical pencil that rotates and constitutes a rotating mechanism that rotates the lead holder together with the rotating member at a predetermined angle in one direction, and rotates the lead as the lead holder rotates.
2. It has a front shaft and a rear shaft, a fixing member is fixedly attached to the front shaft, a chuck for holding a core is arranged inside the front shaft, and a fastener is externally fitted to the head of the chuck, The chuck is urged rearward in the longitudinal direction by a chuck spring, and a coupling member that receives the fastener pressed by the chuck is configured to be rotatable with respect to a slide member that can be appropriately moved in the longitudinal direction within the front shaft. When the tip member is connected to the slide member and writing is performed, the grip is gripped by hand with respect to the slide member that stops moving forward when the core is pressed against the paper surface and receiving pressure. When the member moves forward and the core is separated from the paper surface, the slide member moves forward with respect to the grip member held by hand, and a front cam and a rear cam are formed with respect to the tip member connected to the slide member. The sliding member can be moved in the longitudinal direction And a rotating member in which a front cam and a rear cam are formed in the tip member is rotatably incorporated, and the front cam of the rotating member, the front cam of the sliding member, and the rotating member A rear cam and a rear cam of the sliding member are configured to be able to contact each other, a center piece having a core guide pipe fixed to the inside of the rotating member is disposed, and a core holder for holding the core is attached to the middle piece , The middle piece and the core holder are movable in the longitudinal direction and are not rotatable with respect to the rotating member, and the sliding member is reciprocated in the longitudinal direction with respect to a tip member connected to the sliding member by writing. By moving the rotating member, the front cam of the rotating member, the front cam of the sliding member, the rear cam of the rotating member, and the rear cam of the sliding member come into contact with each other to rotate the rotating member in one direction. The core holder is rotated together with the member in one direction at a predetermined angle. Mechanical pencil, characterized in that that the rotation mechanism constitute, rotate the core with the rotation of the wick holder.
3. It has a front shaft and a rear shaft, a fixing member is fixedly attached to the front shaft, a chuck for holding a core is arranged inside the front shaft, and a fastener is externally fitted to the head of the chuck, The chuck is urged rearward in the longitudinal direction by a chuck spring, and a coupling member that receives the fastener pressed by the chuck is configured to be rotatable with respect to a slide member that can be appropriately moved in the longitudinal direction within the front shaft. When the tip member is connected to the slide member and writing is performed, the grip is gripped by hand with respect to the slide member that stops moving forward when the core is pressed against the paper surface and receiving pressure. When the member moves forward and the core is separated from the paper surface, the slide member moves forward with respect to the grip member held by hand, and the slide member moves in the longitudinal direction with respect to the tip member connected to the slide member. Built-in non-rotatable The rotary member formed with a front cam and a rear cam member incorporated rotatably, the rear end of the rotary member configured to be brought into contact with the front end of the sliding member, forming a front cam to said destination member Then, an inner piece having a rear cam formed on the inner front surface is press-fitted and fixed to the front member, and the front cam of the front member, the front cam of the rotating member, the rear cam of the rotating member, and the rear cam of the inner piece are brought into contact with each other. contact capable constitute, fitted with a wick holder for holding the core to the rotary member, by reciprocating the slide member relative to which it has been linked member to the slide member in the longitudinal direction by the writing, the sliding member The rear end of the rotating member comes into contact with the front end of the rotating member, and the rotating member advances by being pushed by the sliding member. The front cam of the rotating member, the front cam of the leading member, and the rear cam of the inner piece The rotating cam rotates in one direction when the rear cam of the member abuts, Mechanical pencil with serial rotary member constitute a rotating mechanism for rotating the wick holder every predetermined angle in one direction, and wherein the rotating core with the rotation of the wick holder.
4). It has a front shaft and a rear shaft, a fixing member is fixedly attached to the front shaft, a chuck for holding a core is arranged inside the front shaft, and a fastener is externally fitted to the head of the chuck, The chuck is urged rearward in the longitudinal direction by a chuck spring, and a coupling member that receives the fastener pressed by the chuck is configured to be rotatable with respect to a slide member that can be appropriately moved in the longitudinal direction within the front shaft. When the tip member is connected to the slide member and writing is performed, the grip is gripped by hand with respect to the slide member that stops moving forward when the core is pressed against the paper surface and receiving pressure. When the member moves forward and the core is separated from the paper surface, the slide member moves forward with respect to the grip member held by hand, and the slide member moves in the longitudinal direction with respect to the tip member connected to the slide member. Built-in non-rotatable The rotary member formed with the rear cam member incorporated rotatably, before the rear end of the sliding member and the rotating member to the front end of the configured contactable to form a front cam to the rear face to the rotary member A cam member is press-fitted and fixed, an inner piece is press-fitted and fixed to the tip member, a front cam is formed on the inner front surface of the inner piece, a rear cam is formed on the inner rear surface, and the front cam of the front cam member The front member of the inner piece, the rear cam of the inner piece, and the rear cam of the rotating member are configured to come into contact with each other, a lead holder for holding a lead is attached to the rotating member, and a leading member connected to the slide member by writing The sliding member is reciprocated in the longitudinal direction, whereby the rear end of the rotating member comes into contact with the front end of the sliding member, and the rotating member moves forward by being pushed by the sliding member. The front cam of the cam member, the front cam of the inner piece, and the inside And a rotating mechanism configured to rotate the core holder in one direction at a predetermined angle together with the rotating member. A mechanical pencil characterized in that the core is rotated with the rotation. Is.

  In the present invention, the lead holder rotates in one direction by the reciprocating movement of the tip member due to the writing pressure, and the lead and chuck rotate as the lead holder rotates. The main part of the mechanical pencil moves backward, so that the retraction of the lead is not directly transmitted to the hand holding the gripping part, and writing becomes easy. Further, since the lead and the slide member are retracted together with the tip member, an advantage that it is difficult to feel the retreat of the lead is obtained.

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

  The present invention realizes a mechanical pencil that rotates a lead holder by reciprocating a tip member with a writing pressure with respect to a gripping member, and rotates the lead and chuck by rotating the lead holder.

  Hereinafter, the mechanical pencil according to the first embodiment of the present invention will be described with reference to FIGS. 1, 2, 3, 4, 5, 6, and 7. 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 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. A pipe-shaped core tank 8 to be press-fitted and fixed, a connecting tool 9 for receiving the fastener 6, and a chuck spring 10 attached between the connecting tool 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, a rotating mechanism for rotating the rotating member 14 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. 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 and the inclined surface 17E of the rear cam 17B of the sliding member 17 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 rotating member 14 and the sliding member 17 are built in the tip member 12, but a protrusion 17 </ b> G formed at a relative position of the sliding member 17 is inserted into the key groove 12 </ b> A of the tip member 12. Thus, the sliding member 17 is configured to be movable in the longitudinal direction but 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, 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 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 accommodated in the core tank 8 to form a swing-out type mechanical pencil.

  When writing with the mechanical pencil, the core 15 is pressed against the paper surface, and as shown in FIG. 5, the chuck 5 receiving the writing pressure, the fastener 6, the connector 9, the slide member 3, the fixing piece 4, and the tip member 12. Although the rotating member 14 is 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 member 17 in which the protrusion 17G comes into contact with the key 2B of the front shaft 2. Also, the front spring 18 is advanced together with the front shaft 2 while being compressed. 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. Since the chuck 5, the connector 7 and the lead tank 8 are separated from the pressing member 24, and the gap between the weight body 19 and the lead tank 8 is larger than the gap between the fixed piece 4 and the weight body 19, the lead There is no fear that the rotation of the tank 8 is hindered by the pressing member 24 or 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 mechanical pencil of the first embodiment, since the mechanism for rotating the rotating member 14 is built in the tip member 12, the rear of the connector 9 has a structure similar to that of a normal swing-out mechanical pencil, There is an advantage that a swing-out mechanical pencil can be configured easily. 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 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. The rear shaft 20 is detachably threadedly engaged with the male threaded portion 104B of the fixed piece 104 to constitute a swing-out mechanical pencil.

  When writing with the mechanical pencil, the core 15 is pressed against the paper surface, and as shown in FIG. 9, the chuck 5 receiving the writing pressure, the fastener 6, the connector 9, the slide member 3, the fixed piece 104, the rear shaft 20. The front member 12 and the rotating member 14 are stopped, but the front shaft 102 and the gripping member 1 gripped by hand with respect to the slide member 3 move forward, and the protrusion 17G comes into contact with the key 102B of the front shaft 102. The sliding member 17 also moves forward together with the front shaft 102 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. 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 mechanical pencil of Example 2, when the pen pressure is applied to the core 15, the front member 12, the slide member 3, and the rear shaft 20 are integrally retracted with respect to the gripping member 1 and the front shaft 102 gripped by hand. Therefore, the feeling that the lead is retracted is less than that in which the lead is retracted in the tip member, and writing becomes easier.

  Hereinafter, the mechanical pencil according to the third embodiment of the present invention will be described with reference to FIG. 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 into the front shaft 2 from the front and the fixed piece 204 is inserted from the rear, and the slide member 3 and the fixed piece 204 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 204A of the fixed piece 204. The inner flange 2A of the front shaft 2 is positioned between the rear end of the slide member 3 and the fixed piece 204. It is configured to be able to move back and forth as appropriate between the outer stage 204A.

The mechanical part of the mechanical pencil includes a chuck 105 whose head is divided into several parts, a fastener 6 fitted to the head of the chuck 105, a pipe-shaped core tank 108 fixed to the rear part of the chuck 105, and a clamp. The connector 9 is configured to receive the tool 6, and the chuck spring 10 is mounted between the connector 9 and the core tank 108 with a load of about 500g.

  The operation of rotating the core 15 by the writing pressure is performed in the same manner as in the first embodiment. When the chuck 105 and the lead tank 108 rotate, the lead tank 108 and the pressing member 24 are separated from each other, so that the rotation of the lead tank 108 is not hindered by the pressing member 24.

  When the lead 15 is worn by writing, the pressing member 24 is advanced by pressing the knob 27, and the pressing member 24 abuts the rear end of the lead tank 108 to advance the lead tank 108 and the chuck 105. Then, the fixed lead 15 is fed out in the same manner as a conventionally known knock mechanical pencil.

  Hereinafter, a mechanical pencil according to a fourth embodiment of the present invention will be described with reference to FIGS. 11, 12, 13, and 14. The same members as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted. First, in FIG. 11, 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, a rotating mechanism for rotating the rotating member 114 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. 12, the front cam 114A of the rotating member 114 includes a large number of inclined surfaces 114C inclined forward in the clockwise direction, and a vertical surface 114D positioned between the inclined surfaces 114C and 114C. It consists of. Further, 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 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 rotating member 114 and the sliding member 117 are 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 key groove 12 </ b> A of the tip member 12. Thus, the sliding member 117 is configured to be movable in the longitudinal direction but 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 2A of the front shaft 2 is brought into contact with the outer stage 4A of the fixed piece 4 to constitute a swing-out mechanical pencil.

  When writing with the mechanical pencil, the core 15 is pressed against the paper surface, and as shown in FIG. 13, the chuck 5 receiving the writing pressure, the fastener 6, the connecting tool 9, the slide member 3, the fixing piece 4, and the tip member 12. The rotating member 114 is stopped, but 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 117 in which the protrusion 117G is in contact with the key 2B of the front shaft 2. Also, the front spring 18 is advanced together with the front shaft 2 while being compressed. 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. 14, 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, and the gap between the weight body 19 and the lead tank 8 is larger than the gap between the fixed piece 4 and the weight body 19. Since it is configured to be large, there is no possibility that the rotation of the lead tank 8 is hindered by the pressing member 24 and the weight body 19.

  Also in the case of the mechanical pencil of Example 4, since the mechanism for rotating the rotating member 114 is built in the tip member 12, the rear side from the connector 9 has a structure similar to that of a normal swing-out mechanical pencil, There is an advantage that a swing-out mechanical pencil can be configured easily. 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, the mechanical pencil according to the fifth embodiment of the present invention will be described with reference to FIGS. 15 and 16. The same members as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is omitted. First, in FIG. 15, 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, a rotating mechanism for rotating the rotating member 214 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 incorporated in the tip member 112 so as to be slidable and rotatable in the longitudinal direction. 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. Then, 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 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 come into contact with each other to form a swing-out mechanical pencil.

  When writing with the mechanical pencil, as shown in FIG. 16, the lead 15 is pushed against the paper surface, and the chuck 5, the fastener 6, the connector 9, the slide member 3, the tip member 112, and the inner piece receiving the writing pressure. 28 is stopped, but 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 the front shaft. 2 and the front spring 118 is compressed while moving forward. 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, the mechanical pencil according to the sixth embodiment of the present invention will be described with reference to FIGS. 17 and 18. In addition, the same member as FIG. 15 attaches | subjects the same code | symbol, and abbreviate | omits the description. First, referring to FIG. 17, 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 inner cam 128 has the same number of inclined surfaces of the front cam 128C and the inclined surface of the rear cam 128A, 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. 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 come into contact with each other to form a swing-out mechanical pencil.

When writing with the mechanical pencil, as shown in FIG. 18, the core 15 is pushed against the paper surface, as shown in FIG. 18, the chuck 5, the fastener 6, the connector 9, the slide member 3, the tip member 212, and the inner piece. 128 is stopped, but the front shaft 2 and the gripping member 1 gripped by hand with respect to the slide member 3 are advanced, and the sliding member 217 in which the protrusion 217G is in contact with the key 2B of the front shaft 2 is also the front shaft. 2 and the front spring 118 is compressed while moving forward. 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 flange 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 mechanical pencil of Example 7 according to 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. 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.

  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 seventh 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 mechanical pencil of Example 8 according to the present invention will be described with reference to FIG. 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.

  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 eighth 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 when carrying.

  Hereinafter, the mechanical pencil according to the ninth embodiment of the present invention will be described with reference to FIGS. 21 and 22. In addition, the same member as FIG. 19 attaches | subjects the same code | symbol, and abbreviate | omits the description. First, the tip member 412 is made of a transparent or colored synthetic resin, and is printed or transferred with a satin finish or opaque ink on the surface, and a window portion 412F having transparency at a part thereof. Form. Further, a key groove 412A that is cut out from the rear end and extends at the rear portion of the front member 412 is formed at a relative position. Further, the display member 31 is press-fitted and attached to the rotating member 414. The display member 31 is provided with a display 31A so that the rotation of the core 15 can be visually observed. The display 31A of the display member 31 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 412, and the protrusion 17G of the sliding member 17 is inserted into the key groove 412A of the tip member 412. Then, the tip member 412 is detachably screwed to the slide member 3 and attached. Then, the display 31 </ b> A formed on the display member 31 can be viewed from the window 412 </ b> F of the tip member 412. Therefore, the state in which the rotating member 414 rotates can be always visually observed from the window portion 412F of the tip member 412.

  In addition, it is preferable to form the window part 412F of the front member 412 in the shape of a circumference, or to form two or more at equal intervals in the circumference direction.

  In the case of the mechanical pencil of the ninth embodiment, the display 31A indicating the rotation of the core 15 can be viewed through the window 412F of the tip member 412, and the display 31A can be easily viewed during writing.

  Hereinafter, the mechanical pencil of Example 10 according to the present invention will be described with reference to FIGS. 23 and 24. In addition, the same member as FIG. 21 attaches | subjects the same code | symbol, and abbreviate | omits the description. First, the tip member 512 is made of transparent or colored synthetic resin having transparency, and a male screw portion 512G is formed on the rear surface portion. On the surface of the tip member 512, printing or transfer is performed with opaque ink, and a transparent window portion is formed in a part thereof. 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. The lock member 32 is formed with a female screw portion 32A and the locking portion 32B is extended rearward. The lock member 32 is screwed to the tip member 512 so as to be movable in the longitudinal direction. Moreover, the locking portion 32B of the lock member 32 is configured to be able to contact the front end of the front shaft 2. Usually, the engaging portion 32B of the lock member 32 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 lead 15, the lock member 32 is rotated and retracted, and the locking portion 32 </ b> B is brought into contact with the front shaft 2 to be in the state shown in FIG. 24. Then, the front shaft 2 cannot move in the longitudinal direction with respect to the tip member 512 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 core 15 rotates and the state in which the core 15 does not rotate can be selected according to the purpose of use by the user, and the rotation of the core 15 can be confirmed from the window portion of the tip member 512. There is an advantage that it is possible to naturally determine whether the core 15 is rotating or not.

  Hereinafter, the mechanical pencil of Example 11 according to the present invention will be described with reference to FIGS. 25, 26, 27 and 28. In addition, the same member as FIG. 23 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 the rear surface portion 612H is raised, and a protruding portion 612I extending in the circumferential direction is formed on the rear surface portion 612H. 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. Moreover, while forming the recessed part 132C extended in the circumferential direction on the inner surface of the locking member 132, the cam part 132D extended backward is formed in a relative position. The cam portion 132D is formed with a locking portion 132B and a stopper portion 132E extending further rearward than the locking portion 132B. Further, the cam portion 202C of the front shaft 202 is formed with a concave portion 202D that is notched rearward at a relative position. The concave portion 132C of the lock member 132 is rotatably attached to the protruding portion 612I of the tip member 612. Further, when the cam portion 132D of the lock member 132 is aligned with the recess 202D of the front shaft 202 and is in the state shown in FIGS. 25 and 26, the cam portion 132D of the lock member 132 and the cam portion 202C of the front shaft 202 are appropriately separated. Thus, the front shaft 202 can move in the longitudinal direction with respect to the tip member 612 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.

  In addition, when it is desired to stop the rotation of the lead 15, if the lock member 132 is rotated to the right with respect to the front, the edge of the recess 202 </ b> D formed by the stopper portion 132 </ b> E of the lock member 132 on the cam portion 202 </ b> C of the front shaft 202. The lock member 132 is stopped from rotating in contact with 202E, and the locking portion 132B of the lock member 132 comes into contact with the cam portion 202C of the front shaft 202, resulting in the state shown in FIGS. In this state, the front shaft 202 cannot move forward 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.

  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 612. There is an advantage that it is possible to determine naturally whether 15 is rotating or not.

  Hereinafter, the mechanical pencil of Example 12 according to the present invention will be described with reference to FIGS. 29 and 30. 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 302. Further, a female screw portion 302F is formed at the rear portion of the front shaft 302. Further, the male screw portion 232F is formed at the front portion of the lock member 232, and the rear portion 232G is formed with a large diameter. The male screw portion 232F of the lock member 232 is screwed into the female screw portion 302F of the front shaft 302 so as to be movable in the longitudinal direction, and the rear portion 232G of the lock member 232 covers the outer casing 304C of the fixing piece 304. The In the state shown in FIG. 29, the sliding member 17 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 232 is rotated to move the front shaft 302 forward in the longitudinal direction. Then, the state shown in FIG. 30 is obtained, and the sliding member 17 is moved forward by being pushed by the key 302B of the front shaft 302, and the protrusion 17G of the sliding 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 302 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 232 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 twelfth embodiment.

  Hereinafter, the mechanical pencil of Example 13 according to the present invention will be described with reference to FIG. In addition, the same member as FIG. 1 attaches | subjects the same code | symbol, and abbreviate | omits the description. First, the shock absorbing spring 33 having a mounting load of about 150 g is attached between the rear end of the slide member 103 and the inner flange 2A of the front shaft 2. The load when the buffer spring 33 is attached is configured to be stronger than the load when the front spring 18 is attached.

  When writing with the mechanical pencil, the core 15 is pressed against the surface of the paper, and the chuck 5, the fastener 6, the connecting tool 9, the slide member 103, the fixed piece 404, the tip member 12, and the rotating member 14 that receive the writing pressure are stopped. However, the front shaft 2 and the gripping member 1 gripped by hand with respect to the slide member 103 move forward while compressing the buffer spring 33, and the sliding member 17 in which the protrusion 17 </ b> G is in contact with the key 2 </ b> B of the front shaft 2. Also, the front spring 18 is advanced together with the front shaft 2 while being compressed. 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 advance, the front shaft 2 and the gripping member 1 can be moved gently by the buffer spring 33 during writing. There is an advantage that the hindrance to writing caused by the rocking can be alleviated.

  Hereinafter, the mechanical pencil according to the fourteenth embodiment of the present invention will be described with reference to FIGS. 32, 33, and 34. In addition, the same member as FIG. 31 attaches | subjects the same code | symbol, and abbreviate | omits the description. First, a shock absorbing member 34 made of a soft material such as rubber or a low resilience foam is attached between the rear end of the slide member 103 and the inner flange 2A of the front shaft 2 with a load of about 150 g. The buffer member 34 is formed in a cylindrical shape, and a plurality of protrusions 34A projecting rearward in the longitudinal direction are formed at the rear part at equal intervals in the circumferential direction. Further, the load at the time of mounting the buffer member 34 is configured to be stronger than the load at the time of mounting the front spring 18.

  When writing with the 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 103, the fixed piece 404, 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 103 move forward while compressing the buffer member 34, and the sliding member 17 in which the protrusion 17G is in contact with the key 2B of the front shaft 2 is also provided. The front spring 18 moves forward 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 moved gently by the buffer member 34 during writing. There is an advantage that the hindrance to writing caused by the rocking can be alleviated.

  Hereinafter, the mechanical pencil according to the fifteenth embodiment of the present invention will be described with reference to FIGS. 35, 36, and 37. In addition, the same member as FIG. 15 attaches | subjects the same code | symbol, and abbreviate | omits the description. First, the mechanism portion is inserted from the front of the slide member 203, the rear outer collar 9 </ b> A of the coupling tool 9 is inserted into the inner collar 203 </ b> B of the slide member 203, and the inner collar 203 </ b> B of the slide member 203 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 203C is formed at the front portion of the slide member 203, and a rear shaft is detachably screwed to the rear portion of the slide member 203 (not shown).

  The front shaft 402 is formed with a male screw portion 402G and an outer flange 402H at the front, and a piece 402I extending in the longitudinal direction rearward from the outer flange 402H is formed at a relative position. Further, a female screw portion 402F is formed on the piece 402I. The sliding member 317 has an outer flange 317K formed at the rear portion thereof, and a semicircular arc-shaped through hole 317L is formed at the left and right target positions in the outer flange 317K.

  The piece 402I of the front shaft 402 is inserted into the through hole 317L of the sliding member 317, and the sliding member 317 is slidable in the longitudinal direction with respect to the front shaft 402 and is attached so as not to rotate. Further, the male screw portion 203C of the slide member 203 is detachably screwed and attached to the female screw portion 402F formed on the piece 402I of the front shaft 402. A concave groove 317M is formed on the surface of the outer flange 317K of the sliding member 317. 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 317M formed on the surface of the outer flange 317K of the sliding member 317, and the sliding member 317 and the gripping member 101 are connected. Construct a swing-out mechanical pencil.

  When writing with the mechanical pencil, the chuck 5, the fastener 6, the connecting tool 9, the slide member 203, the tip member 712, the front shaft 402 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 203 moves forward, and the sliding member 317 connected to the gripping member 101 also moves forward. Then, it is pushed by the sliding member 317 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 abuts the inclined surface of the front cam 712D of the leading member 712, the inclined surface of the front cam 214A of the rotating member 214 is the inclined surface of the front cam 712D of the leading member 712. 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 203 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 712, 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 712, the front shaft 402 and the slide member 203. However, since the sliding member 317 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 203D of the slide member 203 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, since the sliding member 317 is fixed to the gripping member 101, even if the front member 712 and the front shaft 402 or the front shaft 402 and the sliding member 203 are separated, the members incorporated in each of them. There is no worry of detachment, and the assemblability is improved.

  Hereinafter, the mechanical pencil of Example 16 according to the present invention will be described with reference to FIG. 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 urged rearward in the longitudinal direction by the front spring 18 is brought into contact with the key 201C of the gripping member 201. The rear shaft 20 is detachably screwed to the gripping member 201 to constitute a swing-out mechanical pencil.

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

  Hereinafter, the mechanical pencil of Example 17 according to the present invention will be described with reference to FIG. In addition, the same member as FIG. 19 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 812 is not described in detail, the tip hole 812J is slightly thickened so that the thickened 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, even if the lead 15 being written becomes short and cannot be held by the chuck 5, the writing is continued if the shortened lead 15 is pushed out by the lead 15 held by the chuck 5. And the core 15 also rotates. In this case, however, the chuck 5 does not rotate, and only the shortened writing core 15 rotates.

  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, 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, and the present invention is not limited to the above embodiment. It is not limited, and when the inclined surfaces of the front cams that contact each other come into contact with each other, the contact surfaces of the rear cams that can contact each other are separated from each other and are approximately half the inclined surface dimension in the circumferential direction. It is only necessary that the front and rear cam inclined surfaces and the rear cam inclined surface are inclined in opposite directions with respect to the circumferential direction.

  The lead can be rotated by the back and forth movement of the tip member due to the writing pressure, and the retreat of the lead is not directly transmitted to the hand, making it easier to write and making the retraction of the lead difficult to feel during writing. Applicable to mechanical pencils that do not occur.

DESCRIPTION OF SYMBOLS 1 Gripping member 3 Slide member 5 Chuck 5A Head of chuck 5 6 Fastening tool 9 Connecting tool 10 Chuck spring 12 Tip member 15 Core 16 Core holder 17 Slide member 101 Gripping member 103 Slide member 105 Chuck 105A Chuck 105 head 112 Tip member 116 Core holder 117 Slide member 201 Holding member 203 Slide member 212 Tip member 217 Slide member 312 Tip member 317 Slide member 412 Tip member 512 Tip member 612 Tip member 712 Tip member 812 Tip member

Claims (4)

  It has a front shaft and a rear shaft, a fixing member is fixedly attached to the front shaft, a chuck for holding a core is arranged inside the front shaft, and a fastener is externally fitted to the head of the chuck, The chuck is urged rearward in the longitudinal direction by a chuck spring, and a coupling member that receives the fastener pressed by the chuck is configured to be rotatable with respect to a slide member that can be appropriately moved in the longitudinal direction within the front shaft. When the tip member is connected to the slide member and writing is performed, the grip is gripped by hand with respect to the slide member that stops moving forward when the core is pressed against the paper surface and receiving pressure. When the member moves forward and the core is separated from the paper surface, the slide member moves forward with respect to the grip member held by hand, and a front cam and a rear cam are formed with respect to the tip member connected to the slide member. The sliding member can be moved in the longitudinal direction And a rotating member in which a front cam and a rear cam are formed in the tip member is rotatably incorporated, and the front cam of the rotating member, the front cam of the sliding member, and the rotating member A rear cam and a rear cam of the sliding member are configured to be able to contact each other, a core holder for holding a core is attached to the rotating member, and the sliding member is elongated with respect to a tip member connected to the sliding member by writing. By reciprocating in the direction, the front cam of the rotating member, the front cam of the sliding member, the rear cam of the rotating member, and the rear cam of the sliding member come into contact with each other, and the rotating member rotates in one direction. A mechanical pencil comprising: a rotating mechanism that rotates the lead holder in one direction at a predetermined angle together with the rotating member, and the lead is rotated in accordance with the rotation of the lead holder. It has a front shaft and a rear shaft, a fixing member is fixedly attached to the front shaft, a chuck for holding a core is arranged inside the front shaft, and a fastener is externally fitted to the head of the chuck, The chuck is urged rearward in the longitudinal direction by a chuck spring, and a coupling member that receives the fastener pressed by the chuck is configured to be rotatable with respect to a slide member that can be appropriately moved in the longitudinal direction within the front shaft. When the tip member is connected to the slide member and writing is performed, the grip is gripped by hand with respect to the slide member that stops moving forward when the core is pressed against the paper surface and receiving pressure. When the member moves forward and the core is separated from the paper surface, the slide member moves forward with respect to the grip member held by hand, and a front cam and a rear cam are formed with respect to the tip member connected to the slide member. The sliding member can be moved in the longitudinal direction And a rotating member in which a front cam and a rear cam are formed in the tip member is rotatably incorporated, and the front cam of the rotating member, the front cam of the sliding member, and the rotating member A rear cam and a rear cam of the sliding member are configured to be able to contact each other, a center piece having a core guide pipe fixed to the inside of the rotating member is disposed, and a core holder for holding the core is attached to the middle piece , The middle piece and the core holder are movable in the longitudinal direction and are not rotatable with respect to the rotating member, and the sliding member is reciprocated in the longitudinal direction with respect to a tip member connected to the sliding member by writing. By moving the rotating member, the front cam of the rotating member, the front cam of the sliding member, the rear cam of the rotating member, and the rear cam of the sliding member come into contact with each other to rotate the rotating member in one direction. The core holder is rotated together with the member in one direction at a predetermined angle. Mechanical pencil, characterized in that that the rotation mechanism constitute, rotate the core with the rotation of the wick holder. It has a front shaft and a rear shaft, a fixing member is fixedly attached to the front shaft, a chuck for holding a core is arranged inside the front shaft, and a fastener is externally fitted to the head of the chuck, The chuck is urged rearward in the longitudinal direction by a chuck spring, and a coupling member that receives the fastener pressed by the chuck is configured to be rotatable with respect to a slide member that can be appropriately moved in the longitudinal direction within the front shaft. When the tip member is connected to the slide member and writing is performed, the grip is gripped by hand with respect to the slide member that stops moving forward when the core is pressed against the paper surface and receiving pressure. When the member moves forward and the core is separated from the paper surface, the slide member moves forward with respect to the grip member held by hand, and the slide member moves in the longitudinal direction with respect to the tip member connected to the slide member. Built-in non-rotatable The rotary member formed with a front cam and a rear cam member incorporated rotatably, the rear end of the rotary member configured to be brought into contact with the front end of the sliding member, forming a front cam to said destination member Then, an inner piece having a rear cam formed on the inner front surface is press-fitted and fixed to the front member, and the front cam of the front member, the front cam of the rotating member, the rear cam of the rotating member, and the rear cam of the inner piece contact capable constitute, fitted with a wick holder for holding the core to the rotary member, by reciprocating the slide member relative to which it has been linked member to the slide member in the longitudinal direction by the writing, the sliding member The rear end of the rotating member comes into contact with the front end of the rotating member, and the rotating member advances by being pushed by the sliding member. The front cam of the rotating member, the front cam of the leading member, and the rear cam of the inner piece The rotating cam rotates in one direction when the rear cam of the member abuts, Mechanical pencil with serial rotary member constitute a rotating mechanism for rotating the wick holder every predetermined angle in one direction, and wherein the rotating core with the rotation of the wick holder. It has a front shaft and a rear shaft, a fixing member is fixedly attached to the front shaft, a chuck for holding a core is arranged inside the front shaft, and a fastener is externally fitted to the head of the chuck, The chuck is urged rearward in the longitudinal direction by a chuck spring, and a coupling member that receives the fastener pressed by the chuck is configured to be rotatable with respect to a slide member that can be appropriately moved in the longitudinal direction within the front shaft. When the tip member is connected to the slide member and writing is performed, the grip is gripped by hand with respect to the slide member that stops moving forward when the core is pressed against the paper surface and receiving pressure. When the member moves forward and the core is separated from the paper surface, the slide member moves forward with respect to the grip member held by hand, and the slide member moves in the longitudinal direction with respect to the tip member connected to the slide member. Built-in non-rotatable The rotary member formed with the rear cam member incorporated rotatably, before the rear end of the sliding member and the rotating member to the front end of the configured contactable to form a front cam to the rear face to the rotary member A cam member is press-fitted and fixed, an inner piece is press-fitted and fixed to the tip member, a front cam is formed on the inner front surface of the inner piece, a rear cam is formed on the inner rear surface, and the front cam of the front cam member The front member of the inner piece, the rear cam of the inner piece, and the rear cam of the rotating member are configured to come into contact with each other, a lead holder for holding a lead is attached to the rotating member, and a leading member connected to the slide member by writing The sliding member is reciprocated in the longitudinal direction, whereby the rear end of the rotating member comes into contact with the front end of the sliding member, and the rotating member moves forward by being pushed by the sliding member. The front cam of the cam member, the front cam of the inner piece, and the inside And a rotating mechanism configured to rotate the core holder in one direction at a predetermined angle together with the rotating member. A mechanical pencil characterized in that the core is rotated with the rotation.

Images