阅读说明：本技术 一种自动更换不同规格铅芯的铅笔及其使用方法 (Pencil capable of automatically replacing lead cores of different specifications and using method thereof ) 是由 杨建� 陈锋 干千喜 陈伟 吴天益 张若晗 杨岐 王巧玲 汪雅芳 于 2019-10-22 设计创作，主要内容包括：本发明公开了一种自动更换不同规格铅芯的铅笔及其使用方法,涉及铅笔技术领域。该铅笔包括笔盖、笔管和笔头；笔管中设有储芯装置和有送芯装置；笔头包括笔头主体和出芯构件,出芯构件包括球形转换构件和两个不同内径的出芯管,球形转换构件上具有贯穿其内部并分别与两个出芯管轴向连通的出芯孔,笔头主体端部对称设有两个卡槽；笔头主体一端与笔管的一端可拆卸连接,球形转换构件活动连接在笔头主体的另一端上,转动球形转换构件能够使其中一个出芯管卡入相应的卡槽内,另一个出芯管通过相应的出芯孔与送芯装置轴向连通,以接纳送芯装置来的铅芯。本发明通过设置具有两个不同内径出芯管的出芯构件,能够输出不同直径规格的铅芯,更加方便使用。(The invention discloses a pencil capable of automatically replacing lead cores with different specifications and a using method thereof, and relates to the technical field of pencils. The pencil comprises a pencil cap, a pencil tube and a pencil head; the pen tube is internally provided with a core storage device and a core feeding device; the pen point comprises a pen point main body and a core outlet component, the core outlet component comprises a spherical conversion component and two core outlet pipes with different inner diameters, the spherical conversion component is provided with a core outlet hole which penetrates through the spherical conversion component and is axially communicated with the two core outlet pipes respectively, and the end part of the pen point main body is symmetrically provided with two clamping grooves; one end of the pen point main body is detachably connected with one end of the pen tube, the spherical conversion component is movably connected to the other end of the pen point main body, one of the core discharging tubes can be clamped into the corresponding clamping groove by rotating the spherical conversion component, and the other core discharging tube is axially communicated with the core feeding device through the corresponding core discharging hole so as to receive a lead from the core feeding device. According to the invention, the core discharging components with two core discharging pipes with different inner diameters are arranged, so that lead cores with different diameters can be output, and the pencil lead discharging device is more convenient to use.)

1. A pencil capable of automatically replacing lead cores with different specifications comprises a pencil cap (1), a pencil tube (2) and a pencil head (3); in the pen tube (2), one end close to the pen cap (1) is provided with a core storage device (4), and one end close to the pen point (3) is provided with a core feeding device (5); the method is characterized in that: the pen point (3) comprises a pen point main body (31) and a core discharging component (32), the core discharging component (32) comprises a spherical conversion component (321) and two core discharging pipes (322) with different inner diameters, the spherical conversion component (321) is provided with core discharging holes (323) which penetrate through the spherical conversion component (321) and are axially communicated with the two core discharging pipes (322), and the end parts of the pen point main body (31) are symmetrically provided with clamping grooves (312) which are used for containing the two core discharging pipes (322); the pencil head comprises a pencil head main body (31), one end of the pencil head main body (31) is detachably connected with one end of a pencil tube (2), a spherical conversion member (321) is movably connected to the other end of the pencil head main body (31), the spherical conversion member (321) is rotated to enable one of the lead outlet tubes (322) to be clamped into the clamping groove (312) correspondingly, and the other lead outlet tube (322) is axially communicated with the lead feeding device (5) through the corresponding lead outlet hole (323) so as to receive a lead from the lead feeding device (5).

2. The pencil of claim 1, wherein the pencil comprises: the core storage device (4) comprises a conversion wheel (41), a support shaft (42), a ratchet wheel positioning mechanism (43) and a plurality of core storage tubes (44), wherein the ratchet wheel positioning mechanism (43) comprises a ratchet wheel (431) and an annular non-return component (432); the supporting shaft (42) is axially arranged in the pen tube (2), and the conversion wheel (41) and the ratchet wheel (431) are fixed in the middle of the supporting shaft (42); the annular non-return member (432) is fixed on the inner wall of the pen tube (2) and coaxially surrounds the ratchet wheel (431), and the annular non-return member (432) internally has a non-return tooth (4321) meshed with a ratchet (4311) of the ratchet wheel (431); the core storage tube (44) axially penetrates through the conversion wheel (41) and the ratchet wheel (431), surrounds the support shaft (42), and is distributed in a one-to-one correspondence manner with the ratchet teeth (4311), and a mark corresponding to the core storage tube (44) is arranged on one side of the conversion wheel (41) far away from the corresponding core storage tube (44); the switching wheel (41) is rotated to enable one of the core storage tubes (44) to be communicated with the core feeding device (5).

3. The pencil of claim 2, wherein the pencil is characterized in that: the lead feeding device (5) comprises a lead returning device (51) and a lead discharging device (52), the lead discharging device (52) enables the lead to move from the lead storage device (4) to the pen point (3), and the lead returning device (51) enables the lead to move back from the pen point (3) to the lead storage device (4).

4. The pencil of claim 3, wherein the pencil is characterized in that: the core returning device (51) and the core discharging device (52) are identical in structure and respectively comprise a core guide tube (501), a damping spring (502) and a damping tube (503), one end of the core guide tube (501) is provided with a locking sheet (5011) tending to open, the damping tube (503) is sleeved on the locking sheet (5011), the damping spring (502) is sleeved on the core guide tube (501), one end of the damping spring (502) abuts against the step on the outer wall of the core guide tube (501), and the other end of the damping spring abuts against the damping tube (503); and a damping tube (503) of the refill device (51) is fixedly connected with the inner wall of the pen tube (2).

5. The pencil of claim 4, wherein the pencil is characterized in that: the core returning device (51) and the core discharging device (52) are symmetrically arranged, and the core returning device (51) is in clearance fit with the opposite ends of the core guiding pipe (501) on the core discharging device (52).

6. The pencil of claim 4, wherein the pencil is characterized in that: the pen tube (2) is provided with a key assembly (6) for driving the core returning device (51) and the core discharging device (52) to act.

7. The pencil of claim 6, wherein the pencil comprises: the key assembly (6) comprises a key (61), a first spring (62) and a second spring (63); a first pressing plate (511) is arranged on the core guide tube (501) of the core returning device (51), a second pressing plate (521) is arranged on the core guide tube (501) of the core discharging device (52), and a left pressing plate (611) and a right pressing plate (612) are arranged on the key (61); the left pressing plate (611) is in contact fit with the first pressing plate (511), the right pressing plate (612) is in contact fit with the second pressing plate (521), and the surfaces of the connection parts are inclined surfaces; the first spring (62) is connected between the left pressing plate (611) and the second pressing plate (521), the second spring (63) is connected between the right pressing plate (612) and the first pressing plate (511), and the first spring (62) and the second spring (63) are crossed but not contacted.

8. The pencil according to any one of claims 1 to 7, wherein: an upper clapboard (21) and a lower clapboard (22) are arranged in the pen tube (2), and two ends of the support shaft (42) are respectively movably connected with the upper clapboard (21) and the lower clapboard (22); the centers of the upper partition plate (21) and the lower partition plate (22) are provided with holes for lead cores to pass through.

9. A pencil according to any one of claims 1 to 7 for automatically changing different sizes of lead cores, wherein: a funnel-shaped core guide member (23) is arranged at one end of the pen cap (1) on the pen tube (2), and one of the core storage tubes (44) can be communicated with the lower opening of the core guide member (23) by rotating the conversion wheel (41); the pen cap (1) is detachably fixed at the upper opening of the core guiding component (23).

10. A method of using a pencil as claimed in claim 7, wherein the method comprises the steps of:

step one, converting a core tube: rotating the spherical conversion member (321) to enable the core discharging pipe (322) capable of outputting the target lead core to be axially communicated with the core guiding pipe (501) of the core discharging device (52), and clamping the other core discharging pipe (322) into the clamping groove (312) corresponding to the other core discharging pipe;

step two, switching lead cores:

i, rotating a conversion wheel (41) on the core storage device (4) to enable the corresponding mark on the conversion wheel (41) to be rotated to expose the pen tube (2), and continuing to rotate until a ratchet (4311) on the opposite side of the mark passes over the corresponding non-return tooth (4321);

ii, rotating the conversion wheel (41) until the rotation is blocked, wherein the mark is positioned in the middle of the part of the conversion wheel (41) exposed outside the pen tube (2), and the lead storage tube (44) storing the lead with the corresponding type is aligned with the lead feeding device (5);

step three, core drawing:

pressing the upper side of a key (61), directly pressing a first pressing plate (511) by a left pressing plate (611) on the upper side to move a core guide tube (501) of the core returning device (51) upwards, extending and opening a locking sheet (5011) at the end part of the core guide tube (501) from a damping tube (503) outside the core guide tube, and releasing the held lead core;

ii, further pressing the upper side of the key (61), and after the first spring (62) is compressed to a certain degree, starting to push the lead-out device (52) to act, so that the lead moves towards the pen point (3);

iii, continuously pressing the upper side of the key (61) to realize lead propelling of the pencil;

step four, returning the core:

pressing the lower side of the key (61), directly pressing a second pressing plate (521) by a right pressing plate (612) on the lower side to enable a core guide tube (501) of the core discharging device (52) to move downwards, and enabling a locking sheet (5011) at the end part of the core guide tube (501) to extend out of a damping tube (503) outside the core guide tube and open to release the held lead core;

ii, further pressing the lower side of the key (61), after the second spring (63) is compressed to a certain degree, starting to push the lead returning device (51) to act, and enabling the lead to move from the pen point (3) to the guide tube (501);

and iii, continuously pressing the lower side of the key (61) to realize lead returning of the pencil.