Pen

Abstract

The utility model provides a pen. The pen comprises a pen shell, a pressing piece and a rotating piece. The pen shell comprises a pen cavity, a display hole communicated with the pen cavity, and a pen outlet end and a pressing end arranged at the two ends of the pen cavity in the length direction. The pressing piece is arranged in the pen cavity at the pressing end. The rotating piece is arranged in the pen cavity and movably connected with the pressing piece at the end, close to the pen outlet end, of the pressing piece. The rotating part comprises a display surface arranged towards the wall surface of the pen cavity; and the display surface can be exposed from the display hole and comprises a first display surface and a second display surface which are arranged differently. Wherein the pen has a pen-out state and a refill-collecting state; the pressing piece can move in the length direction and drive the rotating piece to move in the length direction and rotate around the axis of the pen, so that the pen is switched between the pen outlet state and the refill collecting state. When the pen is in a pen outlet state, the first display surface is exposed from the display hole; and when the pen is in a refill collecting state, the second display surface is exposed from the display hole.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of stationery, in particular to a pen. BACKGROUND

[0002] The pens on the market have two ways: pressing out the pen core and uncovering the pen core by opening the cover. For the pen of pressing out the core, the consumer can only judge whether the pen is out of the core by observing whether the pen core is exposed at the pen head. The way of observing the pen head lacks intuitiveness and interest. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a pen to solve part or all of the deficiencies in the related art.

[0004] The present application provides a pen, comprising:

[0005] a pen shell, comprising a pen cavity, a display hole communicating with the pen cavity, and an out pen end and a pressing end arranged at both ends of the pen cavity along the length direction;

[0006] a pressing piece arranged in the pen cavity at the pressing end; and

[0007] a rotating piece arranged in the pen cavity and movably connected with the pressing piece at one end of the pressing piece close to the out pen end; the rotating piece comprises a display surface arranged towards the wall surface of the pen cavity; the display surface can be exposed from the display hole and comprises a first display surface and a second display surface arranged differently;

[0008] wherein the pen comprises an out pen state and a core collecting state; the pressing piece can move along the length direction and drive the rotating piece to move along the length direction and rotate around the axis of the pen, so as to switch the pen between the out pen state and the core collecting state;

[0009] when the pen is in the out pen state, the first display surface is exposed from the display hole;

[0010] when the pen is in the core collecting state, the second display surface is exposed from the display hole.

[0011] Further, the pressing piece comprises a plurality of first matching parts distributed around the axis; the rotating piece comprises a plurality of second matching parts distributed around the axis; the first matching parts can match with the second matching parts to drive the second matching parts to move along the length direction and make the rotating piece have a rotating trend.

[0012] Further, the first matching part is a clamping groove; the clamping groove is recessed from the end of the pressing piece towards the out pen end and comprises a first inclined surface;

[0013] The second matching part is a protrusion; when the first matching part contacts the second matching part, the protrusion is located in the card slot; the protrusion comprises a second inclined surface matched with the first inclined surface.

[0014] Further, the pen shell further comprises a sliding groove arranged in the pen cavity; the sliding groove comprises a translation groove extending along the length direction and a rotation groove in communication with the sliding groove on the side close to the pen outlet end; the rotation groove extends around the axis;

[0015] When the pen is in the pen-out state, the second matching part is located in the rotation groove;

[0016] When the pen is in the core-in state, the second matching part is located in the translation groove.

[0017] Further, the second matching part comprises a protrusion; the protrusion comprises a second inclined surface; the rotation groove comprises a third inclined surface matched with the second inclined surface; when the pen is switched from the core-in state to the pen-out state, the second inclined surface slides along the third inclined surface, so that the rotation member moves along the length direction towards the pressing member.

[0018] Further, the rotation groove comprises a first groove body and a second groove body in communication; the first groove body and the second groove body are distributed around the axis; wherein,

[0019] The depth of the translation groove in communication with the first groove body is the same as the depth of the first groove body;

[0020] The depth of the translation groove in communication with the second groove body is smaller than the depth of the second groove body.

[0021] Further, the pressing member further comprises a plurality of limiting parts distributed around the axis; the limiting parts are accommodated in the translation groove.

[0022] Further, the number of the first matching parts is twice the number of the second matching parts.

[0023] Further, the pen shell further comprises a first boss arranged in the pen cavity; the pressing member comprises a second boss; the first boss and the second boss are oppositely arranged along the length direction; the pen further comprises a reset member;

[0024] One end of the reset member abuts against the first boss, the other end abuts against the second boss, and the reset member applies a force to the pressing member from the pen outlet end towards the pressing end.

[0025] Further, the pen further comprises a pen core arranged in the pen cavity; one end of the pen core towards the pressing end abuts against the rotation member; the pen further comprises an elastic member arranged along the length direction;

[0026] One end of the elastic member abuts against the refill and the other end abuts against the pen shell, and the elastic member applies a force to the refill from the pen outlet end to the pressing end.

[0027] The technical scheme provided by the embodiment of the present application can include the following beneficial effects:

[0028] As can be seen from the above embodiment, the pen is arranged in such a manner that the user can determine whether the pen is in the pen outlet state or in the refill collection state by observing whether the first display surface or the second display surface is in the display hole, thereby further increasing the intuitiveness of observing the pen state. Meanwhile, due to the different arrangement of the first display surface and the second display surface, when the pen switches between the pen outlet state and the refill collection state, the first display surface and the second display surface are switched, thereby further improving the interest of using the pen.

[0029] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0031] Figure 1 It is an overall schematic diagram of one embodiment of the pen of the present application;

[0032] Figure 2 It is shown as Figure 1 It is a cross-sectional schematic diagram of the pen A-A cut surface shown;

[0033] Figure 3 It is an overall schematic diagram of one embodiment of the pen of the present application, wherein Figure 3 The pen shell is hidden;

[0034] Figure 4 It is a partial perspective schematic diagram of one embodiment of the pen of the present application, wherein the pen is in the pen outlet state;

[0035] Figure 5 It is shown as Figure 4 It is a partial perspective schematic diagram of the pen shown, wherein the pen is in the refill collection state.

[0036] Explanation of reference signs:

[0037] 100 pen, 1 pen shell, 11 pen cavity, 12 display hole, 13 pen outlet end, 14 pressing end, 15 sliding groove, 151 translation groove, 152 rotation groove, 1521 first groove body, 1522 second groove body, 153 third inclined surface, 16 first boss, 2 pressing piece, 21 first matching part, 211 clamping groove, 212 first inclined surface, 22 limiting part, 23 second boss, 3 rotating piece, 31 display surface, 311 first display surface, 312 second display surface, 32 second matching part, 321 protrusion, 322 second inclined surface, 4 reset piece, 5 elastic piece, 6 pen core, 7 flexible sleeve, 8 pen clip, Z length direction, X axis. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments (or, the implementation manners) of the present application will be described clearly and completely in combination with the drawings. When the following description refers to the drawings, the same or similar elements in different drawings are denoted by the same reference numerals unless otherwise indicated.

[0039] If the application embodiments involve directional indications or positional relationships (such as up, down, left, right, front, back, inner, outer, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between components in a certain posture (as shown in the drawings); if the posture changes, the directional indications or positional relationships will also change accordingly. In addition, the terms "first", "second", etc. in the application embodiments are only used for convenience of description, and cannot be understood as indicating or implying relative importance.

[0040] Reference Figures 1 to 3 The present application provides a pen 100. The pen 100 comprises a pen shell 1, a pressing piece 2, and a rotating piece 3. The pen shell 1 comprises a pen cavity 11, a display hole 12 communicating with the pen cavity 11, and a pen outlet end 13 and a pressing end 14 arranged at both ends of the pen cavity 11 along a length direction Z. The pressing piece 2 is arranged in the pen cavity 11 at the pressing end 14. The rotating piece 3 is arranged in the pen cavity 11 and movably connected to the pressing piece 2 at one end of the pressing piece 2 close to the pen outlet end 13. The rotating piece 3 comprises a display surface 31 arranged towards the wall surface of the pen cavity 11. The display surface 31 can be exposed from the display hole 12 and comprises a first display surface 311 and a second display surface 312 arranged differently.

[0041] The pen 100 includes an out-pen state and a core-in state. The pressing member 2 is movable along the length direction Z and drives the rotating member 3 to move along the length direction Z and rotate around the axis X of the pen 100, so as to switch the pen 100 between the out-pen state and the core-in state. When the pen 100 is in the out-pen state, the first display surface 311 is exposed from the display hole 12; when the pen 100 is in the core-in state, the second display surface 312 is exposed from the display hole 12.

[0042] By such an arrangement, the user of the pen 100 can determine whether the pen 100 is in the out-pen state or the core-in state by observing whether the first display surface 311 or the second display surface 312 is in the display hole 12, further increasing the intuitiveness of observing the state of the pen 100. At the same time, due to the different arrangements of the first display surface 311 and the second display surface 312, the first display surface 311 and the second display surface 312 are switched when the pen 100 is switched between the out-pen state and the core-in state, further improving the interest of using the pen 100.

[0043] The different arrangements of the first display surface 311 and the second display surface 312 can be different colors, different textures, or different words. Of course, the first display surface 311 and the second display surface 312 can also have multiple different points, such as having both texture differences and color differences. The present application does not limit this.

[0044] As shown in Figure 1 In some optional embodiments, the number of display holes 12 includes multiple display holes. The multiple display holes 12 are distributed along the length direction Z. Since the rotating member 3 rotates around the axis X of the pen 100, the display holes 12 distributed along the length direction Z can simultaneously display the first display surface 311 or the second display surface 312. The increase in the number of display holes 12 can increase the exposed area of the first display surface 311 and the second display surface 312, making the switching effect of the first display surface 311 and the second display surface 312 more obvious. In addition, compared with increasing the area of one display hole 12, the embodiment of multiple display holes 12 is beneficial to ensure the structural strength of the pen shell 1.

[0045] The rotation mode of the rotating member will be described below.

[0046] In combination with reference to Figure 4 and Figure 5 In an embodiment, the pressing member 2 includes multiple first matching portions 21 distributed around the axis X. The rotating member 3 includes multiple second matching portions 32 distributed around the axis X. The first matching portions 21 can cooperate with the second matching portions 32 to drive the second matching portions 32 to move along the length direction Z and make the rotating member 3 have a rotation tendency.

[0047] Since the pressing member 2 can move along the length direction Z to switch the pen 100 between the pen extension state and the retracted state, the pressing member 2 actually drives the pen refill 6 in the pen cavity 11 to move. By providing a first mating part 21 on the pressing member 2 to cooperate with the second mating part 32 of the rotating member 3, the pen 100 can simultaneously integrate the movement of the pen refill 6 and the movement and rotation of the rotating member 3 onto the pressing member 2, thereby improving the tightness of the structure and the integration of functions.

[0048] Furthermore, compared to embodiments where a mating structure is provided on the pen refill 6 to engage with the second mating part 32, the embodiment where the pressing member 2 is provided with the first mating part 21 allows the user to replace the pen refill 6 later without considering whether the structure of the pen refill 6 engages with the second mating part 32 of the rotating member 3. Therefore, this embodiment is beneficial for improving the compatibility of the pen 100 with different pen refills 6, reducing the cost of producing the pen refill 6, and thus controlling the overall cost of the pen 100.

[0049] In an optional embodiment, the first mating part 21 is a slot 211. The slot 211 is recessed from the end of the pressing member 2 toward the pen-out end 13 and includes a first inclined surface 212. The second mating part 32 is a protrusion 321. When the first mating part 21 contacts the second mating part 32, the protrusion 321 is located in the slot 211. The protrusion 321 includes a second inclined surface 322 that mates with the first inclined surface 212. The mating of the slot 211 and the protrusion 321 is more secure. When the pressing member 2 moves along the length direction Z toward the pen-out end 13, the first inclined surface 212 contacts the second inclined surface 322. The inclination angle of the first inclined surface 212 applies a force about the axis X to the second inclined surface 322, thereby causing the rotating member 3 to have a rotational tendency about the axis X. The surface contact between the first inclined surface 212 and the second inclined surface 322 can reduce the pressure of the force exerted on each other by the first mating part 21 and the second mating part 32, thereby avoiding material fatigue and improving the service life of the pen 100.

[0050] exist Figure 3 and Figure 4 In the embodiment shown, the rotating member 3 is sleeved on the outer periphery of the pressing member 2, so the slot 211 and the protrusion 321 are in Figure 3 In the illustrated embodiments, all parts are exposed. This arrangement facilitates the machining of the slot 211 and the protrusion 321. However, in other embodiments, the pressing member 2 can be sleeved on the outer periphery of the rotating member 3. In this case, when the pen 100 is removed from the pen shell 1, the first mating part 21 and the second mating part 32 are both hidden inside the rotating member 3 and the pressing member 2 near the axis X. This arrangement improves the aesthetics of the structure. This application does not limit this aspect.

[0051] To limit the movement of the rotating member 3, in an embodiment, the pen shell 1 further comprises a sliding groove 15 arranged in the pen cavity 11. The sliding groove 15 comprises a translation groove 151 extending along the length direction Z and a rotation groove 152 communicating with the translation groove 151 at a side close to the pen outlet end 13. The rotation groove 152 extends around the axis X. When the pen 100 is in the pen-out state, the second matching part 32 is located in the rotation groove 152. When the pen 100 is in the pen-in state, the second matching part 32 is located in the translation groove 151.

[0052] When the pen 100 is switched from the pen-in state to the pen-out state, the second matching part 32 moves along the translation groove 151 extending along the length direction Z. Under the limiting action of the translation groove 151, the rotating member 3 can only move in translation along the length direction Z and cannot rotate. When the second matching part 32 moves along the length direction Z to the rotation groove 152, since the rotation groove 152 extends around the axis X and the rotating member 3 has a tendency to rotate at this time, the rotating member 3 can rotate in the rotation groove 152. At this time, the first display surface 311 and the second display surface 312 are switched under the rotation of the rotating member 3.

[0053] Conversely, when the pen 100 is switched from the pen-out state to the pen-in state, the second matching part 32 first rotates around the axis X in the rotation groove 152 and then enters the translation groove 151. The second matching part 32 in the translation groove 151 can only move in translation along the length direction Z.

[0054] By arranging the sliding groove 15, the movement and rotation trajectory of the rotating member 3 can be controlled, thereby improving the movement accuracy of the rotating member 3. In this way, the pen 100 can maintain the position accuracy after the rotating member 3 rotates multiple times, avoiding the situation that the second display surface 312 is exposed in the display hole 12 in the pen-out state and the first display surface 311 is exposed in the display hole 12 in the pen-in state. In addition, since the display hole 12 and the sliding groove 15 of the pen 100 are arranged in the pen shell 1, the relative positions of the display hole 12 and the sliding groove 15 remain unchanged. Therefore, the pen 100 of this embodiment only needs to keep the matching relationship between the rotating member 3 and the pressing member 2 unchanged, that is, it can ensure that the first display surface 311 is exposed from the display hole 12 in the pen-out state and ensure that the second display surface 312 is exposed from the display hole 12 in the pen-in state.

[0055] Further, in the embodiment where the second engaging portion 32 comprises the protrusion 321 and the protrusion 321 comprises the second inclined surface 322, the rotating groove 152 comprises a third inclined surface 153 which cooperates with the second inclined surface 322. When the pen 100 is switched from the retracted state to the extended state, the second inclined surface 322 slides along the third inclined surface 153, so that the rotating member 3 moves along the length direction Z towards the pressing member 2. By such arrangement, when the pen 100 is switched to the extended state, the rotating member 3 needs to slide along the third inclined surface 153 after moving to the limit position along the length direction Z under the pushing action of the pressing member 2, and then moves towards the pressing member 2 before being fixed in the extended state. At this time, the top end of the protrusion 321 abuts against the top end of the third inclined surface 153 of the rotating groove 152, so that the position of the rotating member 3 in the rotating groove 152 is fixed, and the position deviation of the first display surface 311 and the second display surface 312 due to the vibration of the pen 100 during writing is avoided.

[0056] With reference to Figure 4 and Figure 5 In some embodiments, the rotating groove 152 comprises a first groove body 1521 and a second groove body 1522 which are in communication. The first groove body 1521 and the second groove body 1522 are spaced apart around the axis X. The depth of the translation groove 151 which is in communication with the first groove body 1521 is the same as the depth of the first groove body 1521. The depth of the translation groove 151 which is in communication with the second groove body 1522 is smaller than the depth of the second groove body 1522. In this way, when the second engaging portion 32 is located in the second groove body 1522, the second engaging portion 32 cannot enter the translation groove 151, and at this time the second engaging portion 32 abuts against the surface of the second groove body 1522, and is kept in the extended state. When the pressing member 2 is moved downward again to push the rotating member 3 to move along the length direction Z, the rotating member 3 rotates, so that the second engaging portion 32 enters the first groove body 1521. Since the depth of the first groove body 1521 is the same as the depth of the translation groove 151, the second engaging portion 32 can enter the translation groove 151, so that the refill 6 is retracted. Compared with the structure of the pen 100 in which a catch or the like is arranged in the rotating groove 152, the structure of the pen 100 in this embodiment is simpler, and the processing is easier, so that the production cost of the pen 100 is reduced.

[0057] Although the second engaging portion 32 does not enter the translation groove 151 corresponding to the second groove body 1522, the translation groove 151 corresponding to the second groove body 1522 can reduce the weight of the pen 100 to some extent, and can also improve the uniformity of the wall thickness of the pen shell 1 at the position where the translation groove 151 is arranged, so that the structural strength is improved.

[0058] Further, the pressing member 2 can also be provided with a limiting structure limiting its movement along the length direction Z. In some embodiments, the pressing member 2 further comprises a plurality of limiting portions 22 distributed around the axis X. The limiting portions 22 are accommodated in the translation slot 151. By providing the limiting portions 22, the rotation tendency of the pressing member 2 around the axis X is hindered, so that the first engaging portion 21 and the second engaging portion 32 can be kept in the corresponding engaging positions in the case of multiple uses of the pen 100, or in the case of impact by external force, thereby ensuring the display accuracy of the first display surface 311 and the second display surface 312.

[0059] In the embodiments provided with the first slot body 1521 and the second slot body 1522, the number of the limiting portions 22 can correspond to the number of the translation slot 151. For example, if the number of the translation slot 151 is six, then the number of the first slot body 1521 and the second slot body 1522 is three respectively, and the number of the limiting portions 22 is also six. In this way, the translation slot 151 corresponding to the second slot body 1522 can not accommodate the second engaging portion 32, but can be used to accommodate the limiting portions 22, thereby limiting the pressing member 2.

[0060] In an alternative embodiment, the number of the first engaging portions 21 is twice the number of the second engaging portions 32. For example, the number of the first engaging portions 21 can be six, and the number of the second engaging portions 32 is three. Such a setting can minimize the number of the second engaging portions 32, thereby controlling the production cost of the pen 100 and controlling the weight of the pen 100.

[0061] The plurality of first engaging portions 21 and the plurality of second engaging portions 32 can be uniformly distributed around the axis X, so that the display surface 31 rotates the same angle each time the pen 100 switches between the retracted state and the extended state. When the number of the first engaging portions 21 is six, the number of the first display surface 311 and the second display surface 312 is three respectively, and the first display surface 311 and the second display surface 312 are arranged at intervals. Then in this embodiment, the display surface rotates 60 degrees each time the pen 100 switches between the retracted state and the extended state. The increase in the number of the first engaging portions 21 and the second engaging portions 32 can reduce the angle of rotation of the rotating member 3 each time, which is conducive to improving the smoothness of rotation.

[0062] After the user presses the pressing member 2 towards the extended end 13 to switch the pen 100 from the retracted state to the extended state, the user can manually restore the pressing member 2 to the original position. Alternatively, in an embodiment, as shown in FIG. 10, the pen 100 can be provided with a restoring mechanism 4. Figure 2 and Figure 3As shown, the pen shell 1 further comprises a first boss 16 arranged in the pen cavity 11. The pressing member 2 comprises a second boss 23. The first boss 16 and the second boss 23 are oppositely arranged along the length direction Z. The pen 100 further comprises a reset member 4. One end of the reset member 4 abuts against the first boss 16, and the other end abuts against the second boss 23, and applies a force to the pressing member 2 from the pen outlet end 13 towards the pressing end 14.

[0063] When the user presses the pressing member 2 towards the pen outlet end 13, the force applied by the reset member 4 to the pressing member 2 needs to be overcome. When the force applied by the user to the pressing member 2 disappears, the pressing member 2 moves towards the pressing end 14 under the action of the reset member 4, thereby returning to the original position. In this way, the user does not need to manually reset the pressing member 2 after each switching of the state of the pen 100, and the operation is more convenient. At the same time, the resistance of the reset member 4 to the pressing force of the user can provide the user with a better operation feeling when using the pen 100.

[0064] Similarly, when the pen refill 6 is assembled in the pen cavity 11 of the pen 100, one end of the pen refill 6 abuts against the rotating member 3 towards the pressing end 14. In some embodiments, the pen 100 further comprises an elastic member 5 arranged along the length direction Z. One end of the elastic member 5 abuts against the pen refill 6, and the other end abuts against the pen shell 1, and applies a force to the pen refill 6 from the pen outlet end 13 towards the pressing end 14. When the pen 100 is switched from the pen outlet state to the refill hiding state, the rotating member 3 has a tendency to move along the length direction Z towards the pressing end 14. Under the action of the elastic member 5, the pen refill 6 can enter the pen cavity 11 from the pen outlet end 13 to be hidden, and at the same time, the end of the pen refill 6 towards the pressing end 14 pushes the rotating member 3 to move along the length direction Z, thereby achieving automatic resetting of the rotating member 3. This embodiment also enables the user to not need to manually reset the rotating member 3 after each use of the pen 100. In addition, under the action of the elastic member 5, the pen refill 6 can also be kept inside the pen cavity 11 in the refill hiding state, avoiding exposure of the pen refill 6 due to vibration and shaking.

[0065] In order to reduce the discomfort of the user of the pen 100 after long-time writing, in some embodiments, the pen 100 comprises a flexible sleeve 7 arranged outside the pen shell 1. When the user uses the pen 100, the fingers are held at the position of the flexible sleeve 7. In this way, the flexible sleeve 7 can play a buffering role between the fingers and the pen shell 1, reducing the discomfort of the fingers. At the same time, the flexible sleeve 7 can also be provided with an anti-slip structure on the surface to improve the friction coefficient between the pen 100 and the fingers, avoiding slipping during holding.

[0066] The pen 100 can further comprise a pen clip 8 connected to the pen shell 1. The pen clip 8 can be used to be clamped on a paper, a piece of clothing, a bag of the pen 100, and the like, for fixing the pen 100. At the same time, the arrangement of the pen clip 8 can also avoid the pen 100 from rolling and falling when placed on a table.

[0067] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of the present application is not limited to the precise structure described in the above embodiments and shown in the accompanying drawings; any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

Claims

1. A pen, characterized in that, include: The pen casing includes a pen cavity, a display hole communicating with the pen cavity, and a pen outlet end and a pressing end disposed at both ends of the pen cavity along the length direction; A pressing element is disposed in the pen cavity at the pressing end; as well as, A rotating component is disposed in the pen cavity and is movably connected to the pressing component at one end near the pen outlet end; the rotating component includes a display surface disposed facing the wall of the pen cavity. The display surface can be exposed through the display hole, and includes a first display surface and a second display surface that are distinguishably configured. The pen includes an extended state and a retracted state; the pressing member can move along the length direction and drive the rotating member to move along the length direction and rotate around the axis of the pen, so that the pen switches between the extended state and the retracted state. When the pen is in the extended state, the first display surface is exposed through the display hole; When the pen is in the retracted state, the second display surface is exposed from the display hole.

2. The pen according to claim 1, characterized in that, The pressing member includes a plurality of first mating parts distributed around the axis; the rotating member includes a plurality of second mating parts distributed around the axis; the first mating parts can engage with the second mating parts to drive the second mating parts to move along the length direction and to give the rotating member a rotational tendency.

3. The pen according to claim 2, characterized in that, The first mating part is a slot; the slot is recessed from the end of the pressing member toward the pen tip, and includes a first inclined surface; The second mating part is a protrusion; when the first mating part contacts the second mating part, the protrusion is located in the slot; the protrusion includes a second inclined surface that mates with the first inclined surface.

4. The pen according to claim 2, characterized in that, The pen casing also includes a sliding groove disposed in the pen cavity; the sliding groove includes a translational groove extending along the length direction and a rotational groove communicating with the sliding groove on the side near the pen outlet; the rotational groove extends around the axis. When the pen is in the pen-out state, the second mating part is located in the rotating groove; When the pen is in the core-retracting state, the second mating part is located in the translation groove.

5. The pen according to claim 4, characterized in that, The second mating part includes a protrusion; the protrusion includes a second inclined surface; the rotating groove includes a third inclined surface that mates with the second inclined surface; when the pen switches from the retracted state to the extended state, the second inclined surface slides along the third inclined surface, so that the rotating member moves toward the pressing member along the length direction.

6. The pen according to claim 4, characterized in that, The rotating groove includes a first groove and a second groove that are connected; the first groove and the second groove are spaced apart around the axis; wherein... The depth of the translation groove that communicates with the first groove is the same as the depth of the first groove. The depth of the translation groove that communicates with the second groove is less than the depth of the second groove.

7. The pen according to claim 4, characterized in that, The pressing component also includes a plurality of limiting portions distributed around the axis; the limiting portions are accommodated in the translation groove.

8. The pen according to any one of claims 2-7, characterized in that, The number of the first mating parts is twice the number of the second mating parts.

9. The pen according to claim 1, characterized in that, The pen casing further includes a first protrusion disposed in the pen cavity; the pressing member includes a second protrusion; the first protrusion and the second protrusion are disposed opposite to each other in the length direction; the pen further includes a reset member; One end of the reset member abuts against the first boss, and the other end abuts against the second boss, and applies a force from the pen tip toward the pressing end to the pressing member.

10. The pen according to claim 1, characterized in that, The pen also includes a pen core disposed in the pen cavity; one end of the pen core facing the pressing end abuts against the rotating member; the pen also includes an elastic member disposed along the length direction; One end of the elastic element abuts against the pen refill and the other end abuts against the pen shell, and applies a force to the pen refill from the pen tip to the pressing end.

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