Adjustable writing pen sheath and writing pen

Abstract

The utility model discloses an adjustable writing pen sheath which comprises a sheath main body, elastic telescopic parts are arranged at the two ends of the sheath main body, and the outer wall of the sheath main body protrudes to form a holding part; the first adjusting part is arranged in the sheath main body; a second adjusting member; the first adjusting piece and the second adjusting piece can rotate or move relatively, the elastic telescopic part is compressed or stretched along with the first adjusting piece and the second adjusting piece, and therefore the axial position of the holding part can be adjusted. Through relative rotation or movement of the first adjusting piece and the second adjusting piece, the elastic telescopic part is driven to be compressed or stretched, then the height of the holding part in the axial position of the pen holder is adjusted, different pen holding habits of writers are met, the use comfort degree is improved, the overall structure is simple, and adjustment is convenient.

Description

Technical Field

[0001] The utility model belongs to the field of the structure of writing pens, and particularly relates to an adjustable writing pen sheath and a writing pen. Background Art

[0002] Most of the sheaths of the existing writing pens on the market are cylindrical rubber sleeves directly sleeved on the outer end of the pen rod. The position of the sheath cannot be adjusted according to the writing habit of the user, which reduces the comfort during writing. Moreover, after long-term use, the sheath is likely to slip off the pen rod.

[0003] Chinese Patent CN104284782B discloses "Writing Tool with Movable Protective Sheath". The writing tool includes a pen rod extending longitudinally, a pen tip installed in front of the pen rod, and a protective sheath movably installed on the pen rod, which switches between a protective position covering the pen tip and a retracted position exposing the pen tip. The outer surface of the protective sheath of this writing pen is smooth without raised parts, lacking support when the writer holds the pen, and it is more laborious to hold the pen for a long time. Moreover, this writing pen covers the pen clip by rotating the protective sheath when not in use to prevent the pen tip from staining clothes, but in the use state, the position of the protective sheath relative to the pen rod remains unchanged, and the height of the sheath at the holding position cannot be adjusted according to the writing habit of the writer, reducing the comfort of use. Summary of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides an adjustable writing pen sheath and a writing pen, which can adjust the height of the holding part on the sheath according to the writing habits of different users, improve the comfort of use, and has a simple overall structure and convenient adjustment.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows: An adjustable writing pen sheath includes:

[0006] A sheath body with elastic telescopic parts at both ends, and a holding part is formed by the protrusion of the outer wall;

[0007] A first adjusting member arranged inside the sheath body;

[0008] A second adjusting member;

[0009] The first adjusting member and the second adjusting member can rotate relative to each other or move relative to each other, and the elastic telescopic part is compressed or extended accordingly to realize the adjustment of the axial position of the holding part.

[0010] By the relative rotation or movement of the first adjusting member and the second adjusting member, the utility model drives the elastic telescopic part to be compressed or extended accordingly, and then adjusts the height of the holding part in the axial position of the pen rod to meet the different writing habits of the writers and improve the comfort of use. The overall structure is simple and the adjustment is convenient.

[0011] Further, the position of the second adjusting member is relatively fixed. At this time, with the position of the second adjusting member fixed, rotating the first adjusting member can achieve the axial position adjustment of the holding portion, making the operation more convenient.

[0012] Further, the first adjusting member and the second adjusting member can rotate relative to each other or move relative to each other, and stay at the target position through the positioning structure. The positioning structure stops the relative rotation or movement of the first adjusting member and the second adjusting member, thereby fixing the adjusted height of the holding portion and preventing the position of the holding portion from changing during use and affecting the use.

[0013] Further, the inner wall of the first adjusting member has an internal thread section, and the internal thread section forms an intermittent portion. The outer wall of the second adjusting member has an external thread section, and the external thread section forms a protruding portion. When the internal thread section and the external thread section rotate relative to each other until the protruding portion falls into the intermittent portion, the relative rotation of the first adjusting member and the second adjusting member stops. The cooperation of the internal thread section and the external thread section realizes the relative movement of the first adjusting member and the second adjusting member, which is simple and effective. The cooperation of the protruding portion and the intermittent portion can make the first adjusting member and the second adjusting member stay stably at the target height, and the holding portion will not shift randomly. Moreover, the switching operation of the first adjusting member and the second adjusting member from the non-rotatable state to the rotatable state is simple.

[0014] Further, the first adjusting member has a movable elastic piece, and the second adjusting member has a clamping groove arranged axially at intervals, and the clamping groove penetrates the wall thickness. The movable elastic piece can move inside the second adjusting member through the clamping groove. When the movable elastic piece abuts against the clamping groove, the relative movement of the first adjusting member and the second adjusting member stops. The cooperation of the movable elastic piece and the clamping groove is convenient for switching to the state where the first adjusting member and the second adjusting member cannot move axially relative to each other while not affecting the axial relative movement of the first adjusting member and the second adjusting member, and the operation is relatively simple.

[0015] Further, the movable elastic piece is in a T shape, and the clamping groove is formed by axially connecting a plurality of T-shaped through grooves. The shapes of the movable elastic piece and the clamping groove match, which is convenient for clamping the movable elastic piece into the clamping groove, and the clamping groove can further limit the moving path of the first adjusting member relative to the second adjusting member.

[0016] Further, the movable elastic piece includes a connecting end connected to the first adjusting member and a movable end opposite to the connecting end, and a pressing protrusion is arranged on the outer wall of the movable end. The setting of the pressing protrusion helps the user accurately position the movable elastic piece and provides a force application point for the user. Setting the pressing protrusion at the movable end far from the connecting end makes the pressing operation of the movable elastic piece relatively labor-saving.

[0017] Furthermore, the elastic telescopic part is corrugated; the first adjusting part and the sheath body are formed by secondary injection molding. The corrugated design enables the elastic telescopic part to generate relatively balanced deformation during the switching process between the compressed and extended states, without causing local excessive protrusion of the sheath body, resulting in better overall aesthetics and higher usage comfort; the first adjusting part and the sheath body are formed by secondary injection molding, with a simple processing technology, firm structural connection between the two, and not easily separable.

[0018] The present utility model also discloses a writing pen, including a pen core, an upper pen barrel, a lower pen barrel, and the adjustable writing pen sheath described above. The sheath body is movably arranged between the upper pen barrel and the lower pen barrel, and the second adjusting part is connected between the upper pen barrel and the lower pen barrel.

[0019] The beneficial effects of the present utility model are as follows: 1) By the relative rotation or movement of the first adjusting part and the second adjusting part, the elastic telescopic part is driven to compress or extend accordingly, thereby adjusting the height of the holding part in the axial position of the pen barrel to meet the different pen-holding habits of the writer and improve the usage comfort; 2) Through the positioning structure, the relative rotation or movement of the first adjusting part and the second adjusting part is stopped, thereby fixing the adjusted height of the holding part and preventing the position of the holding part from changing during use and affecting the use; 3) The positioning structure is diverse, simple in structure, and convenient to operate. Description of the Drawings

[0020] Figure 1 is the front view of Embodiment 1 of the present utility model Figure 1 , at this time, the elastic telescopic part at the lower end of the sheath body is in a compressed state, and the position of the holding part is relatively low.

[0021] Figure 2 is the front view of Embodiment 1 of the present utility model Figure 2 , at this time, the elastic telescopic part at the lower end of the sheath body is in an extended state, and the position of the holding part is adjusted higher.

[0022] Figure 3 is the cross-section of Embodiment 1 of the present utility model Figure 1 , at this time, the elastic telescopic part at the lower end of the sheath body is in a compressed state, and the position of the holding part is relatively low.

[0023] Figure 4 is Figure 3 the enlarged view of the structure at A in

[0024] Figure 5 is the cross-section of Embodiment 1 of the present utility model Figure 2 , at this time, the elastic telescopic part at the lower end of the sheath body is in an extended state, and the position of the holding part is adjusted higher.

[0025] Figure 6 is Figure 5 the enlarged view of the structure at B in

[0026] Figure 7 Partial three-dimensional structural schematic diagram of the first adjusting member in Embodiment 1 of the present utility model.

[0027] Figure 8 Three-dimensional structural schematic diagram of the second adjusting member in Embodiment 1 of the present utility model.

[0028] Figure 9 Front view of Embodiment 2 of the present utility model Figure 1 At this time, the elastic telescopic part at the lower end of the sheath body is in a compressed state, and the position of the holding part is relatively low.

[0029] Figure 10 is Figure 9 Enlarged view of the structure at C in

[0030] Figure 11 is Figure 10 Cross-sectional view of

[0031] Figure 12 Front view of Embodiment 2 of the present utility model Figure 2 At this time, the elastic telescopic part at the lower end of the sheath body is in an extended state, and the position of the holding part is relatively high.

[0032] Figure 13 is Figure 12 Enlarged view of the structure at D in

[0033] Figure 14 is Figure 13 Cross-sectional view of

[0034] Figure 15 Three-dimensional structural schematic diagram of the first adjusting member in Embodiment 2 of the present utility model.

[0035] Figure 16 Three-dimensional structural schematic diagram of the second adjusting member in Embodiment 2 of the present utility model.

[0036] Wherein, 1 - sheath body, 11 - elastic telescopic part, 12 - holding part, 2 - first adjusting member, 21 - internal thread section, 22 - discontinuous part, 23 - movable elastic piece, 231 - connecting end, 232 - movable end, 233 - pressing protrusion, 3 - second adjusting member, 31 - external thread section, 32 - protruding part, 33 - clamping groove, 331 - horizontal through groove, 332 - vertical through groove, 4 - upper pen rod, 5 - lower pen rod. Detailed implementation manner

[0037] To enable those skilled in the art to better understand the solution of the present utility model, the following will clearly and completely describe the technical solution in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0038] Embodiment 1

[0039] As Figures 1 - 8 shown, an adjustable writing pen sheath includes a sheath main body 1, a first adjusting member 2 located inside the sheath main body 1, and a second adjusting member 3. Both ends of the sheath main body 1 have elastic telescopic portions 11, and the elastic telescopic portions 11 are in the shape of corrugated tubes. A holding portion 12 protrudes from the outer wall of the sheath main body 1. The holding portion 12 is located between the elastic telescopic portions 11 at both ends and is close to the elastic telescopic portion 11 at the lower end. The outer diameter of the holding portion 12 is larger than that of the sheath main body 1, and it extends around the circumference of the sheath main body 1. In addition, to improve the comfort of use, the holding portion 12 and the rest of the sheath main body 1 are smoothly transitioned. During use, the fingers of the writer hold the outer circumference of the holding portion 12, so that the holding portion 12 provides sufficient support for the writer when holding the pen, making it more labor-saving to hold the pen.

[0040] The first adjusting member 2 and the second adjusting member 3 can rotate relative to each other. Since the first adjusting member 2 is inside the sheath main body 1, the sheath main body 1 can rotate together with the first adjusting member 2, and then the elastic telescopic portion 11 compresses or extends with the rotation of the first adjusting member 2 to achieve the adjustment of the axial position of the holding portion 12.

[0041] Specifically, as Figure 3 、 Figure 4 shown, at this time, the elastic telescopic portion 11 at the upper end of the sheath main body 1 is in an extended state, and the elastic telescopic portion 11 at the lower end of the sheath main body 1 is in a compressed state. At this time, the position of the holding portion 12 is lower and closer to the lower pen barrel 5; as Figure 5 、 Figure 6 shown, the first adjusting member 2 rotates relative to the second adjusting member 3, driving the elastic telescopic portion 11 at the upper end of the sheath main body 1 to be compressed, and the elastic telescopic portion 11 at the lower end of the sheath main body 1 to extend. The axial position of the holding portion 12 becomes higher. On the contrary, when the first adjusting member 2 rotates in the opposite direction relative to the second adjusting member 3, the elastic telescopic portion 11 at the upper end of the sheath main body 1 extends, and the elastic telescopic portion 11 at the lower end of the sheath main body 1 is compressed. The axial position of the holding portion 12 becomes lower. Therefore, according to the writing habit of the user, the height of the holding portion 12 in the axial position of the pen barrel can be adjusted to meet different usage requirements and improve the comfort of use.

[0042] The above structure does not limit the assembly state of the second adjusting member 3, which can be movably assembled or fixedly assembled. In this embodiment, as Figure 3 shown, the position of the second adjusting member 3 is relatively fixed. At this time, the so-called relative rotation of the first adjusting member 2 and the second adjusting member 3 mainly refers to the rotation of the first adjusting member 2 while the second adjusting member 3 remains stationary. In this embodiment, both ends of the second adjusting member 3 are respectively connected to the upper pen barrel 4 and the lower pen barrel 5 of the writing pen by threads. In other embodiments, the second adjusting member 3 can be integrally provided with the upper pen barrel 4, and no specific limitation is made.

[0043] The first adjusting member 2 is in the shape of a hollow cylinder, and its inner wall has an internal thread section 21. The outer wall of the second adjusting member 3 has an external thread section 31. The internal thread section 21 is adapted to the external thread section 31. Through the cooperation of the internal thread section 21 and the external thread section 31, the relative rotation of the first adjusting member 2 and the second adjusting member 3 is realized.

[0044] To further stop the relative rotation of the first adjusting member 2 and the second adjusting member 3 and stop the holding part 12 at the target height position, the internal thread section 21 forms a discontinuous part 22. To be exact, as Figure 7 shown, each turn of the thread of the internal thread section 21 is disconnected to form a discontinuous part 22, that is, each turn of the thread of the internal thread section 21 is discontinuous and intermittently arranged. In this embodiment, each turn of the thread of the internal thread section 21 has two discontinuous parts 22. Of course, in other embodiments, the discontinuous part 22 on each turn of the thread can have one or more, and no specific limitation is made.

[0045] The external thread section 31 forms a protruding part 32. To be exact, the protruding part 32 is located on the vertical surface of the external thread section 31. Taking the Figure 8 shown direction as an example, the protruding part 32 is located on the lower surface of the middle part of the thread of the external thread section 31. The protruding part 32 has an inverted trapezoidal structure. The side walls on the left and right sides of the protruding part 32 extend downward from the top of the protruding part 32 and gradually become narrower; of course, in other embodiments, the protruding part 32 can also be an arc-shaped protrusion, and no specific limitation is made. In this embodiment, the number of the protruding parts 32 is two and is symmetrically arranged on the external thread section 31. In other embodiments, the number of the protruding parts 32 can be set to multiple, and no specific limitation is made.

[0046] When the internal thread section 21 and the external thread section 31 rotate relative to each other, the protruding part 32 and the external thread section 31 are both in the interval between the threads of the internal thread section 21. When rotated until the protruding part 32 falls into the discontinuous part 22, the side wall of the protruding part 32 abuts against the side of the discontinuous part 22 on the internal thread section 21, so that the first adjusting member 2 and the second adjusting member 3 cannot rotate relative to each other, thereby playing a positioning role and ensuring that the holding part 12 after adjusting the height is at the target height position.

[0047] When the first adjusting member 2 is rotated again, an external force needs to be applied to overcome the resistance between the side wall of the protruding portion 32 and the side of the discontinuous portion 22, so that the protruding portion 32 crosses the discontinuous portion 22 and is rotated again into the thread gap in the internal thread section 21, thereby realizing the relative rotation between the first adjusting member 2 and the second adjusting member 3. The inclined structure of the side wall of the protruding portion 32 plays a guiding role to help reduce the resistance between the side wall of the protruding portion 32 and the side of the discontinuous portion 22, facilitating the operator to apply an external force to rotate the protruding portion 32 into the internal thread section 21 again.

[0048] In this embodiment, the first adjusting member 2 is made of an elastic material, and the second adjusting member 3 is made of a hard material, so that when the internal thread section 21 and the external thread section 31 rotate relatively, the thread gap of the internal thread section 21 can accommodate both the external thread section 31 and the protruding portion 32 at the same time. Of course, in other embodiments, the second adjusting member 3 can also be made of an elastic material. When the internal thread section 21 and the external thread section 31 rotate relatively, the protruding portion 32 is deformed and contracted by the extrusion of the internal thread section 21. When the protruding portion 32 falls into the discontinuous portion 22, the protruding portion 32 can automatically expand and recover to achieve the abutment between the side wall of the protruding portion 32 and the side of the discontinuous portion 22, and no specific limitation is made.

[0049] Of course, the discontinuous portion 22 of the internal thread section 21 and the protruding portion 32 of the external thread section 31 can be interchanged. Specifically, the internal thread section 21 forms the protruding portion 32, and the external thread section 31 forms the discontinuous portion 22, which can also achieve the same positioning effect.

[0050] In this embodiment, the sheath body 1 and the first adjusting member 2 are formed by secondary injection molding, and the two are firmly connected and not easily separated.

[0051] The using process of the present utility model: When it is necessary to adjust the axial position of the holding portion 12 upward, an external force is applied to drive the relative rotation of the first adjusting member 2 and the second adjusting member 3. Then, the elastic telescopic portion 11 at the upper end of the sheath body 1 is compressed, and the elastic telescopic portion 11 at the lower end of the sheath body 1 extends, and the axial position of the holding portion 12 becomes higher. At this time, the protruding portion 32 is in the interval between the threads in the internal thread section 21; when the internal thread section 21 and the external thread section 31 rotate relatively until the protruding portion 32 falls into the discontinuous portion 22, the side wall of the protruding portion 32 abuts against the side of the discontinuous portion 22, so that the relative rotation between the first adjusting member 2 and the second adjusting member 3 stops, ensuring that the holding portion 12 after adjusting the height is at the target height position.

[0052] When it is necessary to further increase the axial position of the holding part 12, an external force is applied to overcome the resistance between the side wall of the protruding part 32 and the side of the discontinuous part 22, and the protruding part 32 is moved over the discontinuous part 22 and rotated into the thread gap in the internal thread section 21 again, so that the first adjusting part 2 and the second adjusting part 3 rotate relatively in the same direction, the elastic telescopic part 11 at the upper end of the sheath main body 1 is further compressed, and the elastic telescopic part 11 at the lower end of the sheath main body 1 continues to stretch, thereby further increasing the axial height of the holding part 12.

[0053] On the contrary, when reducing the axial position of the holding part 12, an external force is applied to drive the first adjusting part 2 to rotate in the opposite direction relative to the second adjusting part 3. The elastic telescopic part 11 at the upper end of the sheath main body 1 stretches, the elastic telescopic part 11 at the lower end of the sheath main body 1 is compressed, and the axial position of the holding part 12 becomes lower.

[0054] Embodiment 2

[0055] The difference between this embodiment and Embodiment 1 is that the first adjusting part 2 and the second adjusting part 3 can move relative to each other, so that the elastic telescopic part 11 is compressed or stretched accordingly, so as to realize the adjustment of the axial position of the holding part 12.

[0056] Specifically, as Figure 9 、 Figure 10 shown, the elastic telescopic part 11 at the upper end of the sheath main body 1 is in a stretched state, and the elastic telescopic part 11 at the lower end of the sheath main body 1 is in a compressed state. At this time, the holding part 12 is in a lower position and is closer to the lower pen barrel 5; as Figure 11 、 Figure 12 shown, the first adjusting part 2 moves upward relative to the second adjusting part 3, driving the elastic telescopic part 11 at the upper end of the sheath main body 1 to be compressed, and the elastic telescopic part 11 at the lower end of the sheath main body 1 to stretch. The axial position of the holding part 12 becomes higher. On the contrary, when the first adjusting part 2 moves downward relative to the second adjusting part 3, the elastic telescopic part 11 at the upper end of the sheath main body 1 stretches, and the elastic telescopic part 11 at the lower end of the sheath main body 1 is compressed, and the axial position of the holding part 12 becomes lower.

[0057] To further realize the relative movement of the first adjusting part 2 and the second adjusting part 3 and stay at the target position through the positioning structure after the movement, as Figure 15As shown, the first adjusting member 2 has a movable spring piece 23, which is formed by partially hollowing out the first adjusting member 2. Specifically, the movable spring piece 23 includes a connecting end 231 connected to the first adjusting member 2, a movable end 232 opposite to the connecting end 231, and a pressing protrusion 233 arranged on the outer wall of the movable end 232. In this embodiment, the movable spring piece 23 is in a T-shape, and of course it can also be in any shape such as a 7-shape. Except that the bottom of the connecting end 231 is connected to the first adjusting member 2, the remaining outer edges of the movable spring piece 23 and the first adjusting member 2 form a hollow gap. By pressing the pressing protrusion 233, the upper and middle areas of the movable spring piece 23 can be tilted toward the inside of the first adjusting member 2. After releasing the pressing protrusion 233, the movable spring piece 23 can automatically reset; the setting of the pressing protrusion 233 helps the user to accurately locate the position of the movable spring piece 23 and provides a force application point for the user.

[0058] like Figure 16 As shown, the second adjusting member 3 has axially spaced retaining grooves 33, and the retaining grooves 33 penetrate the wall thickness. To be precise, the retaining grooves 33 are formed by a plurality of T-shaped through grooves that are axially connected, wherein the “— ” at the upper end of the “T”-shaped through groove is a transverse through groove 331, and the “| ” at the lower end of the “T”-shaped through groove is a vertical through groove 332, and the vertical through grooves 332 are connected. In this embodiment, the number of T-shaped through grooves is three. In other embodiments, a plurality of T-shaped through grooves can be provided to extend the movement path of the first adjusting member 2 relative to the second adjusting member 3.

[0059] The movable spring piece 23 can pass through the locking groove 33 and move inside the second adjusting member 3 . When the movable spring piece 23 abuts against the locking groove 33 , the first adjusting member 2 and the second adjusting member 3 stop moving relative to each other.

[0060] Specifically, the first adjusting member 2 is hollow inside and is sleeved on the second adjusting member 3, and the movable spring piece 23 and the locking groove 33 are located in a corresponding position. Figure 11 As shown, the movable spring piece 23 abuts against the locking groove 33, more precisely, the movable end 232 falls into the horizontal through groove 331, at which time the upper and lower ends of the movable end 232 abut against the lowermost horizontal through groove 331 in the locking groove 33, the first adjusting member 2 cannot move relative to the second adjusting member 3, and the position of the gripping portion 12 is fixed.

[0061] When the height of the grip portion 12 needs to be adjusted, the pressing protrusion 233 is pressed, and the movable spring piece 23 passes through the positioning groove 33 and deviates toward the central axis of the pen until the movable end 232 is separated from the horizontal through groove 331. The pressing protrusion 233 is continuously pressed to drag the movable spring piece 23 to move upward in the vertical through groove 332, thereby realizing the upward movement of the first adjustment member 2 relative to the second adjustment member 3. When the height reaches a suitable height, the pressing protrusion 233 is released, the movable spring piece 23 rebounds, and the movable end 232 re-extends into the horizontal through groove 331.Figure 14 As shown, the movable end 232 abuts against the uppermost horizontal through groove 331 in the clamping groove 33, the movable elastic piece 23 is clamped into the clamping groove 33, and the first adjusting member 2 stops relative movement with respect to the second adjusting member 3. At this time, the height of the holding portion 12 is adjusted upward. When it is necessary to lower the height of the holding portion 12, press the pressing protrusion 233 and drag the movable elastic piece 23 to move downward in the vertical through groove 332.

[0062] In this embodiment, the number of the movable elastic pieces 23 is two, and the two movable elastic pieces 23 are symmetrically arranged. Similarly, the number of the clamping grooves 33 is the same as that of the movable elastic pieces 23, which is also two, facilitating the user to press the pressing protrusions 233 on both sides of the first adjusting member 2 simultaneously to move the movable elastic piece 23. In other embodiments, the number of the movable elastic pieces 23 can be set to one, or set to multiple and evenly spaced around the first adjusting member 2, and the clamping grooves 33 are correspondingly arranged with the movable elastic pieces 23, without specific limitation.

[0063] In this embodiment, the sheath main body 1 is made of an elastic material. The middle part of the sheath main body 1 tightly wraps around the outer periphery of the first adjusting member 2, ensuring that the middle part of the sheath main body 1 can move synchronously with the first adjusting member 2, and further enabling the elastic telescopic parts 11 at both ends of the sheath main body 1 to be compressed or extended accordingly; the surface of the sheath main body 1 has a certain softness, and the user can touch the pressing protrusion 233 through the surface of the sheath main body 1 to clarify the position of the movable elastic piece 23, so as to press the pressing protrusion 233 to adjust the axial height of the holding portion 12. Of course, in other embodiments, the outline of the pressing protrusion 233 can be prominently displayed on the outer surface of the sheath main body, without specific limitation.

[0064] During use, press the pressing protrusion 233, the movable end 232 disengages from the horizontal through groove 331, drag the movable elastic piece 23 to move upward in the vertical through groove 332, and then the first adjusting member 2 moves upward relative to the second adjusting member 3, driving the elastic telescopic part 11 at the upper end of the sheath main body 1 to be compressed and the elastic telescopic part 11 at the lower end of the sheath main body 1 to be extended. The axial position of the holding portion 12 becomes higher. Then release the pressing protrusion 233, the movable end 232 resets, the movable elastic piece 23 abuts against the clamping groove 33, and the first adjusting member 2 stops relative movement with respect to the second adjusting member 3 to fix the adjusted height of the holding portion 12;

[0065] On the contrary, press the pressing protrusion 233, the movable end 232 disengages from the horizontal through groove 331, drag the movable elastic piece 23 to move downward in the vertical through groove 332, and then the first adjusting member 2 moves downward relative to the second adjusting member 3, driving the elastic telescopic part 11 at the upper end of the sheath main body 1 to be extended and the elastic telescopic part 11 at the lower end of the sheath main body 1 to be compressed. The axial position of the holding portion 12 becomes lower.

[0066] The remaining structures are the same as those in the first embodiment, and will not be elaborated here.

[0067] A writing pen includes a pen core, an upper pen barrel 4, a lower pen barrel 5, and the adjustable writing pen sheath in the first or second embodiment above. The sheath body 1 is movably disposed between the upper pen barrel 4 and the lower pen barrel 5, and the second adjusting member 3 is connected between the upper pen barrel 4 and the lower pen barrel 5.

[0068] The above specific embodiments are used to explain and illustrate the present invention, rather than to limit the present invention. Any modifications and changes made to the present invention within the spirit and scope of the claims of the present invention fall within the protection scope of the present invention.

Claims

1. An adjustable writing pen sheath, characterized in that, Comprising: A sheath body (1) with elastic telescopic parts (11) at both ends, and a holding part (12) formed by protrusions on the outer wall; A first adjusting member (2) disposed inside the sheath body (1); A second adjusting member (3); The first adjusting member (2) and the second adjusting member (3) can rotate relative to each other or move relative to each other, and the elastic telescopic part (11) is compressed or extended accordingly to adjust the axial position of the holding part (12).

2. The adjustable writing pen sheath according to claim 1, wherein: The position of the second adjusting member (3) is relatively fixed.

3. The adjustable writing pen sheath according to claim 1, characterized in that: The first adjusting member (2) and the second adjusting member (3) can rotate relative to each other or move relative to each other and stay at the target position through a positioning structure.

4. The adjustable pen sheath according to claim 1 or 3, characterized in that: The inner wall of the first adjusting member (2) has an internal thread section (21), and this internal thread section (21) forms an intermittent part (22). The outer wall of the second adjusting member (3) has an external thread section (31), and this external thread section (31) forms a protruding part (32). When the internal thread section (21) and the external thread section (31) rotate relative to each other until the protruding part (32) falls into the intermittent part (22), the first adjusting member (2) and the second adjusting member (3) stop rotating relative to each other.

5. The adjustable pen sheath according to claim 1 or 3, characterized in that: The first adjusting member (2) has a movable elastic piece (23). The second adjusting member (3) has clamping grooves (33) arranged axially at intervals, and these clamping grooves (33) penetrate the wall thickness. The movable elastic piece (23) can move inside the second adjusting member (3) through the clamping grooves (33). When the movable elastic piece (23) abuts against the clamping grooves (33), the first adjusting member (2) and the second adjusting member (3) stop moving relative to each other.

6. The adjustable writing pen sheath according to claim 5, wherein: The movable elastic piece (23) is in a T shape, and the clamping grooves (33) are formed by axially connecting a plurality of T-shaped through grooves.

7. The adjustable writing pen sheath according to claim 6, wherein: The movable elastic piece (23) includes a connecting end (231) connected to the first adjusting member (2) and a movable end (232) opposite to the connecting end (231). A pressing protrusion (233) is provided on the outer wall of the movable end (232).

8. The adjustable writing pen sheath according to claim 1, wherein: The elastic telescopic part (11) is in a bellows shape; the first adjusting member (2) and the sheath body (1) are formed by secondary injection molding.

9. A writing pen, characterized in that: Comprising a refill, an upper pen barrel (4), a lower pen barrel (5), and the adjustable writing pen sheath according to any one of claims 1-8. The sheath body (1) is movably disposed between the upper pen barrel (4) and the lower pen barrel (5), and the second adjusting member (3) is connected between the upper pen barrel (4) and the lower pen barrel (5).

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