Pen shell and pen

Abstract

The utility model provides a pen shell and a pen. The pen shell comprises a shell body and a rotating piece. The shell comprises a pen cavity, a pen outlet end and a tail end opposite to the pen outlet end. The pen cavity is used for containing a refill. The rotating piece is arranged in the pen cavity. The side, facing the pen outlet end, of the rotating piece is used for being connected with the pen refill. And part of the rotating piece is exposed from the tail end of the pen cavity. A first thread is arranged on the wall face of the pen cavity, and a second thread is arranged on the side, facing the wall face, of the rotating piece. The first thread is matched with the second thread so that the rotating piece can move along the axis when rotating around the axis of the pen shell. According to the pen shell, the first thread and the second thread are arranged, so that a writer can control the exposed length of the pen refill at the pen outlet end by controlling the rotating angle of the rotating piece around the axis, and therefore the liked writing hand feeling is achieved through adjustment.

Description

Technical Field

[0001] This application relates to the field of stationery, and more particularly to a pen casing and a pen. Background Technology

[0002] Currently, there are two common types of pens on the market: those that allow the refill to be pressed out and those that allow the refill to be exposed when the cap is opened. Pens with press-out refills are more prone to having the refill pushed out when placed in a bag or clothing pocket, which can stain clothing or bag fabrics and cause an unpleasant experience for the user.

[0003] The open-cap pen tip method requires users to close the cap after writing, otherwise it can easily lead to problems such as lost caps and damaged pen tips, which also bothers users. Utility Model Content

[0004] This application provides a pen casing and a pen to address some or all of the shortcomings of the related art.

[0005] The first aspect of this application provides a pen casing, comprising:

[0006] The housing includes a pen cavity, a pen extension end, and an end opposite to the pen extension end; the pen cavity is used to receive the pen refill; and

[0007] A rotating component is disposed in the pen cavity; the side of the rotating component facing the pen outlet is used to connect with the pen refill; a portion of the rotating component protrudes from the pen cavity from the end.

[0008] The pen cavity wall is provided with a first thread, and the rotating component is provided with a second thread on the side facing the wall; the first thread and the second thread cooperate to enable the rotating component to move along the axis when rotating around the axis of the pen shell.

[0009] Furthermore, the rotating component includes a receiving cavity and an inner end face disposed toward the pen tip; the receiving cavity extends along the axis and includes an assembly opening disposed on the inner end face; the receiving cavity is used to receive the pen refill.

[0010] Furthermore, the receiving cavity also includes an adaptive opening disposed on the rotating member facing the wall surface; the adaptive opening and the assembly opening are in communication; wherein,

[0011] The number of the adaptive openings is one; or...

[0012] The number of the adaptive openings is multiple; the multiple adaptive openings are evenly distributed around the axis.

[0013] Furthermore, the rotating component also includes a venting cavity and an outer end face disposed opposite to the inner end face; the venting cavity extends from the outer end face along the axis and communicates with the receiving cavity; the diameter of the venting cavity is smaller than the diameter of the receiving cavity.

[0014] Furthermore, the pen casing also includes:

[0015] An outer trim piece is fitted onto the portion of the rotating component that protrudes from the pen cavity; the relative positions of the outer trim piece and the rotating component in the rotational direction about the axis are fixed.

[0016] Furthermore, the pen casing also includes:

[0017] An adapter is disposed in the pen cavity, and a portion of the adapter protrudes from the end; the adapter is sleeved on the rotating member and located between the rotating member and the outer trim; the relative position of the adapter and the outer trim is fixed; the relative position of the adapter and the rotating member in the rotational direction around the axis is fixed.

[0018] Furthermore, the side of the adapter facing the exterior trim includes a first mating portion, and the side of the exterior trim facing the adapter includes a second mating portion; the first mating portion and the second mating portion mate, and one of them is configured as a protrusion and the other as a recess; wherein,

[0019] The first mating portion and the second mating portion extend around the axis; and / or, the first mating portion and the second mating portion extend along the axis.

[0020] Furthermore, the adapter has a third mating part on the side facing the rotating member; the rotating member has a fourth mating part on the side facing the adapter; the third mating part and the fourth mating part mate, and one of them is a protrusion and the other is a recess; the third mating part and the fourth mating part extend along the axis.

[0021] Furthermore, the outer trim includes an upper trim and a lower trim; the lower trim is fitted onto the rotating part; the upper trim is detachably connected to the lower trim on the side of the lower trim away from the housing; the relative positions of the upper trim and the lower trim are fixed.

[0022] A second aspect of this application provides a pen, including a pen refill and a pen casing as described in the foregoing embodiments; the pen refill is disposed in the pen cavity; the pen refill is connected to the rotating member and can protrude from the pen outlet end.

[0023] The technical solutions provided by the embodiments of this application may include the following beneficial effects:

[0024] As can be seen from the above embodiments, the pen casing of this application, by setting a first thread and a second thread, allows the writer to control the exposed length of the pen lead at the tip by controlling the rotation angle of the rotating component around the axis, thereby adjusting to their preferred writing feel. In this way, the same pen can meet the writing habits of different writers. Furthermore, compared to technical solutions that use a pressing method to eject the pen lead, the pen of this application requires the writer to rotate the rotating component to eject the pen, thus effectively avoiding the problem of accidental pressing causing the pen lead to protrude from the tip and stain clothing pockets, bags, etc., improving the writer's user experience.

[0025] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this application. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic cross-sectional view is shown as an embodiment of the pen of this application;

[0028] Figure 2 Shown as Figure 1 A magnified view of the area indicated by A;

[0029] Figure 3 Shown as Figure 1 A magnified view of the area indicated by B;

[0030] Figure 4 Shown as Figure 1 A cross-sectional view at position CC;

[0031] Figure 5 The diagram shows a partial schematic of another embodiment of the pen of this application, in which a portion of the structure is rendered in perspective to reveal the internal structure.

[0032] Explanation of reference numerals in the attached figures:

[0033] 100. Pen, 1. Pen shell, 11. Housing, 111. Pen cavity, 111a. First thread, 112. Pen tip, 113. End, 114. Upper housing, 115. Lower housing, 116. Pen shell boss, 12. Rotating component, 12a. Second thread, 121. Receiving cavity, 1211. Assembly opening, 1212. Adaptive opening, 122. Inner end face, 123. Vent cavity, 124. Outer end face, 125. Fourth mating part, 13. Outer trim, 131. Upper trim, 132. Lower trim, 132a. Trim mating part extending along the axis, 132b. Trim mating part extending around the axis, 133. Second mating part, 14. Adapter, 141. First mating part, 141a. First mating part extending along the axis, 141b. First mating part extending around the axis, 142. Third mating part, 2. Pen refill, 21. Pen refill boss, 3. Reset component, Z-axis. Detailed Implementation

[0034] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0035] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, 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 relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0036] refer to Figure 1 and Figure 2This application provides a pen 100. The pen 100 includes a pen shell 1 and a pen refill 2. The pen shell 1 includes a housing 11 and a rotating member 12. The housing 11 includes a pen cavity 111, a pen tip 112, and a terminal end 113 opposite to the pen tip 112. The pen refill 2 is housed in the pen cavity 111. The rotating member 12 is disposed in the pen cavity 111, and the side of the rotating member 12 facing the pen tip 112 is connected to the pen refill 2. Part of the rotating member 12 protrudes from the pen cavity 111 from the terminal end 113, allowing the writer to rotate the rotating member 12 externally. The wall surface of the pen cavity 111 is provided with a first thread 111a, and the side of the rotating member 12 facing the wall surface is provided with a second thread 12a. The first thread 111a and the second thread 12a cooperate to allow the rotating member 12 to move along the axis Z when rotating about the axis Z of the pen shell 1. When the rotating component 12 moves along axis Z toward the pen tip 112, the rotating component 12 drives the pen lead 2 to move along axis Z and protrude from the pen tip 112. When the rotating component 12 moves along axis Z toward the end point 113, the pen lead 2 can also move along axis Z toward the pen tip 112.

[0037] By setting the first thread 111a and the second thread 12a, the writer can control the exposed length of the pen lead 2 at the tip 112 by controlling the rotation angle of the rotating component 12 around the axis Z, thereby adjusting to their preferred writing feel. For example, the longer the exposed length of the pen lead 2 at the tip 112, the more elastic the pen 100 becomes during writing. Conversely, the shorter the exposed length of the pen lead 2 at the tip 112, the more rigid the pen 100 becomes during writing. In this way, the same pen 100 can meet the writing habits of different writers. Furthermore, the threaded engagement of the first thread 111a and the second thread 12a can prevent noise when rotating the rotating component 12, allowing the writer to operate the pen 100 quietly in a quiet environment.

[0038] Furthermore, compared to the technical solution of releasing the pen tip 2 by pressing, the pen 100 of this application requires the writer to rotate the rotating part 12 to release the pen tip 100. Therefore, it can effectively avoid the problem of accidentally pressing the pen tip 100 and causing the pen tip 2 to be exposed from the pen tip 112, thus contaminating clothing pockets, school bags, etc., and improve the writer's user experience.

[0039] The rotation angle required for the rotating component 12 to switch the pen lead 2 from a fully retracted state to a state where the pen tip 112 is fully exposed can be adjusted by adjusting the thread parameters of the first thread 111a and the second thread 12a. Of course, since the first thread 111a and the second thread 12a are mating, a change in the parameters of the first thread 111a will result in a corresponding change in the parameters of the second thread 12a. Therefore, for the sake of brevity, the following explanation will only use the adjustment of the parameters of the first thread 111a as an example. However, those skilled in the art should understand that the parameters of the second thread 12a also change accordingly with the parameters of the first thread 111a.

[0040] For example, the smaller the pitch of the first thread 111a, the larger the rotation angle required for the rotating component 12, but at the same time, the higher the precision adjustment of the distance the pen tip 2 protrudes from the pen tip 112. Alternatively, the first thread 111a can be set as a double-start thread, or a triple-start thread, or even a quadruple-start thread, thereby reducing the rotation angle required for the rotating component 12 to drive the pen tip 2 to move. This application is not limited in this respect.

[0041] In some embodiments, the rotating member 12 includes a receiving cavity 112 and an inner end face 122 facing the pen tip 112. The receiving cavity 112 extends along the axis Z and includes an assembly opening 1211 provided on the inner end face 122. When the pen shell 1 and the pen refill 2 are assembled, the pen refill 2 is inserted into the receiving cavity 112 through the assembly opening 1211, so that the pen refill 2 can be accommodated in the receiving cavity 112. With this arrangement, the wall surface of the receiving cavity 112, which is parallel to the axis Z, can limit the radial movement of the pen refill 2 to a certain extent, thereby improving the fixation stability of the pen refill 2, and thus improving the stability of the pen refill 2 during writing.

[0042] When the diameter of the pen refill 2 is the same as the inner diameter of the receiving cavity 112, or when the pen refill 2 and the receiving cavity 112 are interference-fitted, the rotating component 12 can also drive the pen refill 2 to move towards the end 113 and hide from the pen outlet 112 when it moves along the axis Z toward the end 113. Of course, in some embodiments, such as Figure 1 and Figure 3 As shown, the pen 100 also includes a reset member 3. The housing 11 has a housing boss 116 on one side of the pen cavity 111, and the pen refill 2 has a refill boss 21. When the pen refill 2 is assembled in the pen cavity 111, the refill boss 21 and the housing boss 116 are positioned opposite each other. One end of the reset member 3 abuts against the housing boss 116, and the other end abuts against the refill boss 21, and remains compressed. Thus, the reset member 3 can always apply a force to the pen refill 2 from the pen tip 112 towards the end 113. When the rotating member 12 rotates and moves towards the end 113 under the action of the first thread 111a and the second thread 12a, the reset member 3 can also always keep the pen refill 2 in contact with the rotating member 12 and move towards the end 113, thereby achieving pen retraction 100.

[0043] In embodiments without a receiving cavity 112, the rotating member 12 may directly abut against the end face of the pen refill 2 away from the pen tip 112 via its inner end face 122. Alternatively, the rotating member 12 may have a protrusion that inserts into the hole of the pen refill 2 for fixation. This application is not limited in this regard. In these embodiments, the pen 100 may also have a reset member 3, so that when the rotating member 12 moves toward the end 113 away from the pen refill 2, the pen refill 2 can also move toward the end 113 and be hidden from the pen tip 112.

[0044] like Figure 5 As shown, to improve the adaptability of the rotating component 12 to the diameter of the pen refill 2, in some embodiments, the receiving cavity 112 further includes an adaptation opening 1212 disposed on the rotating component 12 facing the wall. The adaptation opening 1212 communicates with the assembly opening 1211. Therefore, when the diameter of the pen refill 2 is slightly larger, the receiving cavity 112 can also expand radially, thereby accommodating the pen refill 2 well. In this way, the accuracy requirement for the diameter of the pen refill 2 can be reduced, thereby effectively controlling the production cost of the pen 100. Furthermore, when the diameter of the pen refill 2 causes the receiving cavity 112 to expand radially, the first thread 111a and the second thread 12a can achieve a tight fit, thereby reducing looseness during the rotation of the rotating component 12 and improving the user experience of the pen 100.

[0045] The number of adapting openings 1212 can be one, thereby effectively ensuring the structural strength of the rotating member 12. In some embodiments, the number of adapting openings 1212 is multiple, and the multiple adapting openings 1212 are evenly distributed around the axis Z. In this way, the deformability of the rotating member 12 is higher, making it easier for the writer to replace and remove the pen refill 2. The number of adapting openings 1212 can be two, three, or more. However, this application... Figure 5 The embodiment of the pen 100 shown has two adaptive openings 1212, thereby increasing the deformability of the rotating part 12 while ensuring the structural strength of the rotating part 12.

[0046] Back Figure 1 and Figure 2Furthermore, in an embodiment where the rotating member 12 includes a receiving cavity 112, the rotating member 12 also includes a venting cavity 123 and an outer end face 124 disposed opposite to the inner end face 122. The venting cavity 123 extends from the outer end face 124 along the axis Z and communicates with the receiving cavity 112. In other words, the venting cavity 123 and the receiving cavity 112 together form a cavity structure extending from the inner end face 122 through the outer end face 124. The diameter of the venting cavity 123 is larger than the diameter of the receiving cavity 112. When the pen refill 2 is inserted into the receiving cavity 112 from the inner end face 122, due to the diameter difference between the receiving cavity 112 and the venting cavity 123, the end face of the pen refill 2 facing the end 113 can abut against the step at the transition between the receiving cavity 112 and the venting cavity 123, forming a limit on the pen refill 2 in the direction from the pen tip 112 to the end 113, thereby improving the stability of writing. When the pen refill 2 is inserted into the receiving cavity 112 through the self-assembly opening 1211 and moves toward the step, air remains in the receiving cavity 112. At this time, the air can be discharged from the outer end face 124 through the vent cavity 123, thereby preventing residual air from making it difficult for the pen refill 2 to be fully inserted into the receiving cavity 112, or from the air in the receiving cavity 112 moving toward the ink in the pen refill 2 and compressing the ink, thus causing ink leakage from the pen tip 100. In addition, the vent cavity 123 can also reduce the overall weight of the rotating part 12 and improve the lightweight nature of the pen 100.

[0047] The writer can directly contact the rotating member 12, thereby controlling the extension and retraction of the pen lead 2 via the rotating member 12. In some optional embodiments, the pen shell 1 also includes an outer trim 13. The outer trim 13 is fitted onto the portion of the rotating member 12 that protrudes from the pen cavity 111. The relative position of the outer trim 13 and the rotating member 12 in the rotational direction about the axis Z is fixed. Thus, when the writer rotates the outer trim 13 about the axis Z, the rotating member 12 can also rotate about the axis Z under the rotation of the outer trim 13. The outer trim 13 improves the aesthetics of the pen 100. Furthermore, since the rotating member 12 needs to protrude from the pen cavity 111 from the end 113, and the second thread 12a of the rotating member 12 needs to mate with the first thread 111a, there is a limitation on the diameter of the portion of the rotating member 12 protruding from the end 113. A rotating member 12 that is too small would be inconvenient for the writer to rotate. The outer trim 13 and the pen cavity 111 can be set to be unassembled, so the outer periphery of the outer trim 13 can be increased and set to be larger than the diameter of the rotating part 12, thereby making it easier for the writer to grip.

[0048] The exterior trim 13 can be integrally molded. Or, as in... Figure 1In the illustrated embodiment, the outer trim 13 includes an upper trim 131 and a lower trim 132 fixed in relative positions. The lower trim 132 is sleeved on the rotating part 12. The upper trim 131 is detachably connected to the lower trim 132 on the side of the lower trim 132 away from the housing 11. When the outer trim 13 is a single piece, excessive wall thickness will lead to a decrease in yield during processing, such as shrinkage when the outer trim 13 cools down during injection molding. Through the cooperation of the upper trim 131 and the lower trim 132, the volume of the outer trim 13 can be further increased, while the wall thickness of each part can be controlled, which is beneficial to improving the processing yield of the outer trim 13.

[0049] The detachable connection between the upper ornament 131 and the lower ornament 132 can be achieved in various ways, such as through threads, magnets, or snaps. Or, as... Figure 5 As shown, the upper trim 131 and the lower trim 132 are each provided with mating trim fitting parts. Figure 5 In the illustrated embodiment, the lower trim 132 is provided with a trim fitting portion 132a extending along the Z-axis. Since the trim fitting portion 132a is a protrusion, the corresponding trim fitting portion on the upper trim 131 is recessed. The trim fitting portion 132a extending along the Z-axis can restrict the rotation of the upper trim 131 and the lower trim 132 about the Z-axis. Therefore, in this embodiment, the writer can drive the rotating member 12 to rotate by rotating the upper trim 131.

[0050] Optionally, the lower trim 132 may also have a protruding trim fitting portion 132b extending around the Z-axis, while the corresponding trim fitting portion of the upper trim 131 is recessed. The trim fitting portion 132b extending around the Z-axis can restrict the relative movement of the upper trim 131 and the lower trim 132 on the Z-axis, preventing them from falling off. Of course, in other embodiments, the restriction of the relative movement of the upper trim 131 and the lower trim 132 on the Z-axis can be achieved by interference fit, magnetic attraction, or other methods.

[0051] It should be understood that, in addition to the exterior trim 13, Figure 5 In addition to the embodiments shown, it is also possible to have only the trim fitting portion 132a extending along the Z-axis, or only the trim fitting portion 132b extending around the Z-axis. This application is not limited in this respect.

[0052] Because the rotating component 12 moves along the Z-axis during rotation, it creates a displacement relationship with the outer trim component 13. Therefore, the mating length between the outer trim component 13 and the rotating component 12 along the Z-axis needs to be greater than the displacement length of the rotating component 12 along the Z-axis, which may cause difficulties in optimizing the dimensions of the pen 100. Therefore, as... Figure 2 and Figure 5As shown, in some embodiments, the pen casing 1 further includes an adapter 14 disposed in the pen cavity 111. A portion of the adapter 14 protrudes from the end 113. The adapter 14 is sleeved on the rotating member 12 and located between the rotating member 12 and the outer trim member 13. The relative positions of the adapter 14 and the outer trim member 13 are fixed. The relative positions of the adapter 14 and the rotating member 12 in the rotational direction about the axis Z are also fixed.

[0053] Thus, the rotation of the outer trim 13 drives the rotation of the adapter 14, which in turn drives the rotation of the rotating part 12. This allows the writer to directly operate the rotating part to move the pen refill 2. The fixed relative positions of the adapter 14 and the outer trim 13 mean that their relative positions on the Z-axis are also fixed. However, the rotating part 12 moves along the Z-axis during rotation, so the relative positions of the rotating part 12 and the adapter 14 on the Z-axis change. Therefore, the mating length between the rotating part 12 and the adapter 14 needs to be greater than or equal to the displacement length of the rotating part 12 on the Z-axis. Since part of the adapter 14 is located inside the pen cavity 111, the mating portion of the rotating part 12 and the adapter 14 can be located inside the pen cavity 111. This allows for a stable connection between the adapter 14 and the rotating part 12, while also preventing the pen 100 from becoming too large on the Z-axis, thus facilitating the use of the pen 100's internal space.

[0054] Combination Figure 4 The side of the adapter 14 facing the outer trim 13 includes a first mating portion 141. The side of the outer trim 13 facing the adapter 14 includes a second mating portion 133. The first mating portion 141 and the second mating portion 133 mate, with the first mating portion 141 being a protrusion and the second mating portion 133 being a recess. The first mating portion 141 and the second mating portion 133 extend along the Z-axis (e.g., ...). Figure 5 The first mating portion 141a extending along axis Z is shown. With this arrangement, the relative movement of the outer trim 13 and the adapter 14 about axis Z is restricted by the first mating portion 141 and the second mating portion 133. The arrangement of the first mating portion 141 and the second mating portion 133 can reduce the assembly difficulty of the outer trim 13 and the adapter 14. The writer or processor only needs to align the first mating portion 141 and the second mating portion 133 and fit the outer trim 13 onto the adapter 14 along the axial direction.

[0055] The first mating part 141 and the second mating part 133 can also extend around the axis Z, such as... Figure 5The first mating portion 141b extending around axis Z is shown. The first mating portion 141 and the second mating portion 133 extending around axis Z can restrict the relative movement of the outer trim 13 and the adapter 14 along the axial direction. Furthermore, the arrangement of the first mating portion 141 and the second mating portion 133 can also reduce the assembly difficulty of the outer trim 13 and the adapter 14. The writer or processor only needs to fit the outer trim 13 onto the adapter 14 and apply slight force to assemble the first mating portion 141 and the second mating portion 133 around axis Z.

[0056] Admittedly, in other embodiments, the pen 100 may also have a first mating portion 141 that is recessed and a second mating portion 133 that is protruding. Furthermore, the first mating portion 141 and the second mating portion 133 may only be configured to extend along the axis Z, and the limiting along the axis Z may be achieved by means such as magnetic attraction. Alternatively, the first mating portion 141 and the second mating portion 133 may only be configured to extend around the axis Z, and the rotational limiting around the axis Z may be achieved by means such as a pin. This application is not limited in this respect.

[0057] Similarly, in some alternative embodiments, the adapter 14 has a third mating portion 142 on the side facing the rotating member 12. The rotating member 12 has a fourth mating portion 125 on the side facing the adapter 14. The third mating portion 142 and the fourth mating portion 125 mate, with one being a protrusion and the other a recess. The third mating portion 142 and the fourth mating portion 125 extend along the Z-axis. The arrangement of the third mating portion 142 and the fourth mating portion 125 facilitates the assembly of the rotating member 12 and the adapter 14, which helps to improve assembly efficiency and thus further improves production efficiency.

[0058] In the above embodiments, the pen refill 2 can be a gel pen refill, an oil-based pen refill, a ballpoint pen refill, a water-based pen refill, etc. This application is not limiting. Furthermore, the housing 11 may include an upper housing 114 and a lower housing 115. For example... Figure 5 As shown, the upper housing 114 and the lower housing 115 are connected by threads. A first thread 111a is provided on the upper housing 114, and the connection position between the upper housing 114 and the lower housing 115 is close to the first thread 111a. Compared with the solution where the upper housing 114 and the lower housing 115 are located closer to the pen end 112, the upper housing 114 in this embodiment is shorter, which helps to reduce the machining difficulty of the first thread 111a, thereby improving machining efficiency and yield, and thus reducing production costs.

[0059] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A pen case, characterized by, The pen shell (1) comprises: a shell (11) comprising a pen cavity (111), a pen outlet end (112), and an end (113) opposite to the pen outlet end (112); the pen cavity (111) is used for accommodating a refill (2); and a rotating member (12) arranged in the pen cavity (111); one side of the rotating member (12) facing the pen outlet end (112) is used for connecting with the refill (2); part of the rotating member (12) is exposed from the end (113) of the pen cavity (111); wherein a wall surface of the pen cavity (111) is provided with a first thread (111a), and one side of the rotating member (12) facing the wall surface is provided with a second thread (12a); the first thread (111a) cooperates with the second thread (12a) to enable the rotating member (12) to move along an axis (Z) of the pen shell (1) when rotating around the axis (Z).

2. The pen case of claim 1, wherein The rotating member (12) comprises an accommodating cavity (121) and an inner end surface (122) arranged towards the pen outlet end (112); the accommodating cavity (121) extends along the axis (Z) and comprises an assembly opening (1211) arranged at the inner end surface (122); the accommodating cavity (121) is used for accommodating the refill (2).

3. The pen case of claim 2, wherein, The accommodating cavity (121) further comprises an adaptive opening (1212) arranged at the rotating member (12) facing the wall surface; the adaptive opening (1212) and the assembly opening (1211) are in communication; wherein, the number of the adaptive opening (1212) is one; or, the number of the adaptive opening (1212) is multiple; the multiple adaptive openings (1212) are uniformly distributed around the axis (Z).

4. The pen case of claim 2, wherein, The rotating member (12) further comprises a ventilation cavity (123) and an outer end surface (124) arranged opposite to the inner end surface (122); the ventilation cavity (123) extends from the outer end surface (124) along the axis (Z) and is in communication with the accommodating cavity (121); the diameter of the ventilation cavity (123) is smaller than the diameter of the accommodating cavity (121).

5. The pen case of claim 1, wherein, The pen shell (1) further comprises: an outer decoration member (13) sleeved on the part of the rotating member (12) exposed from the pen cavity (111); the relative position of the outer decoration member (13) and the rotating member (12) in the rotation direction around the axis (Z) is fixed.

6. The pen case of claim 5, wherein, The pen shell (1) further comprises: an adapter member (14) arranged in the pen cavity (111) and part of which is exposed from the end (113); the adapter member (14) is sleeved on the rotating member (12) and located between the rotating member (12) and the outer decoration member (13); the relative position of the adapter member (14) and the outer decoration member (13) is fixed; the relative position of the adapter member (14) and the rotating member (12) in the rotation direction around the axis (Z) is fixed.

7. The pen case of claim 6, wherein, The side of the adapter (14) facing the outer trim (13) comprises a first matching part (141), and the side of the outer trim (13) facing the adapter (14) comprises a second matching part (133); the first matching part (141) and the second matching part (133) match, and one of them is provided as a protrusion and the other is provided as a recess; wherein, The first matching part (141) and the second matching part (133) extend around the axis; and / or the first matching part (141) and the second matching part (133) extend along the axis.

8. The pen case of claim 6, wherein, The side of the adapter (14) facing the rotating part (12) is provided with a third matching part (142), and the side of the rotating part (12) facing the adapter (14) is provided with a fourth matching part (125); the third matching part (142) and the fourth matching part (125) match, and one of them is provided as a protrusion and the other is provided as a recess; the third matching part (142) and the fourth matching part (125) extend along the axis (Z).

9. The pen case of claim 5, wherein, The outer trim (13) comprises an upper trim (131) and a lower trim (132); the lower trim (132) is sleeved on the rotating part (12); the upper trim (131) is detachably connected with the lower trim (132) on the side of the lower trim (132) away from the shell (11); the relative position of the upper trim (131) and the lower trim (132) is fixed.

10. A pen characterized by It comprises a refill (2) and a pen shell as claimed in any one of claims 1-9; the refill (2) is arranged in the pen cavity (111); the refill (2) is connected with the rotating part and can be exposed from the pen outlet (112).

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