Tensioning structure for rollable screens and rollable screens

Abstract

This application provides a tensioning structure for a rollable screen and a rollable screen itself. The tensioning structure includes a roller and a return assembly. The roller is connected to the rollable screen. The return assembly is connected to the roller and includes an inner core assembly, a housing assembly, and a return spring. The inner core assembly is assembled on the housing assembly and connected to the roller. A return cavity exists between the inner core assembly and the housing assembly. The return spring is assembled within the return cavity, with one end connected to the inner core assembly and the other end connected to the housing assembly. Under the action of the return spring, the roller drives the inner core assembly to rotate relative to the housing assembly, thereby tensioning the rollable screen. This application enables tensioning and stretching of the rollable screen at any time, ensuring that the rollable screen maintains a pre-tension force under all circumstances, thus maintaining screen flatness, stability, and reliability.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a tensioning structure for a rollable screen and a rollable screen. Background Technology

[0002] With the rapid growth of intelligent and personalized consumer demands and the rapid development of emerging technologies, rollable screens are having a profound impact on the display technology consumer market and industry. However, the reliability and stability of the roll-up mechanism for these screens remain to be addressed. Summary of the Invention

[0003] This application provides a tensioning structure for rolling up a screen that enables tensioning and stretching of the screen at any time.

[0004] This application provides a tensioning structure for a rollable screen, comprising:

[0005] A scroll, connected to the rollable screen; and

[0006] A return assembly, connected to the scroll, includes an inner core assembly, a outer shell assembly, and a return spring; wherein the inner core assembly is assembled on the outer shell assembly and connected to the scroll, a return cavity is provided between the inner core assembly and the outer shell assembly, the return spring is assembled in the return cavity, one end of the return spring is connected to the inner core assembly, and the other end of the return spring is connected to the outer shell assembly; under the action of the return spring, the scroll drives the inner core assembly to rotate relative to the outer shell assembly, thereby rolling up the rollable screen.

[0007] Optionally, the inner core assembly includes an inner core and an inner core cover assembled on top of the inner core, with the spool passing through the inner core cover and connected to the inner core.

[0008] Optionally, the housing assembly includes a housing and a housing cover assembled on top of the housing and located outside the inner core cover, the housing being assembled on the outside of the inner core and forming the return cavity between the housing and the inner core.

[0009] Optionally, the tensioning structure further includes multiple rolling elements; the top of the inner core is provided with multiple first positioning grooves, and the bottom of the inner core cover is provided with multiple second positioning grooves corresponding to the positions of the multiple first positioning grooves; when the inner core cover is assembled on the inner core, the first positioning grooves and the second positioning grooves form a positioning cavity, and the rolling elements are confined in the positioning cavity in the axial direction of the roll.

[0010] Optionally, the top of the outer casing is provided with a first limiting groove extending circumferentially along the spool, and the upper cover of the outer casing is provided with a second limiting groove extending circumferentially along the spool; when the upper cover of the outer casing is assembled to the outer casing, the first limiting groove and the second limiting groove form a rolling groove, the rolling groove is connected to the positioning cavity, and the rolling element is confined within the rolling groove in the radial direction of the spool.

[0011] Optionally, the inner core includes an inner core body and a flange protruding from the outside of the inner core body and extending circumferentially along the inner core body, the flange being located at the bottom of the inner core body; the bottom of the outer shell is provided with a slot that engages with the flange, and when the inner core is assembled into the outer shell, the flange engages with the slot in the axial and / or radial direction of the spool.

[0012] Optionally, the inner core assembly is connected to the reel via a keyed connection structure.

[0013] Optionally, the inner core cover is adhesively fixed to the top of the inner core.

[0014] Optionally, the outer cover is adhesively fixed to the top of the outer casing.

[0015] Optionally, the height of the inner core cover is greater than the height of the outer shell cover.

[0016] Optionally, one end of the return spring is glued and fixed to the outer surface of the inner core, and the other end of the return spring is glued and fixed to the inner surface of the outer shell.

[0017] Optionally, the reel includes a first connecting end and a second connecting end disposed opposite to each other, and the return assembly is assembled to at least one of the first connecting end and the second connecting end.

[0018] This application also provides a rollable screen, including:

[0019] screen; and

[0020] As described in any of the above embodiments, the tensioning structure has a roll connected to the screen, and the screen is tensioned by the tensioning structure.

[0021] Optionally, the scroll includes a shaft and a mounting protrusion disposed on the periphery of the shaft, the mounting protrusion extending axially along the shaft, and the screen being connected to the shaft via the mounting protrusion.

[0022] The tensioning structure of this application embodiment is used for rolling up a rollable screen. The tensioning structure includes a roller and a return assembly. The roller is connected to the rollable screen. The return assembly is connected to the roller and includes an inner core assembly, a outer shell assembly, and a return spring. The inner core assembly is assembled on the outer shell assembly and connected to the roller. A return cavity is provided between the inner core assembly and the outer shell assembly. The return spring is assembled in the return cavity. One end of the return spring is connected to the inner core assembly, and the other end is connected to the outer shell assembly. Under the action of the return spring, the roller drives the inner core assembly to rotate relative to the outer shell assembly to tension the rollable screen. This allows the rollable screen to be tensioned and stretched at any time, ensuring that the rollable screen maintains a pre-tension force under all circumstances, thereby maintaining screen flatness, stability, and reliability. Attached Figure Description

[0023] Figure 1 The diagram shown is a structural schematic of one embodiment of the tensioning structure for rolling up a screen according to this application.

[0024] Figure 2 As shown Figure 1 The diagram shown is a schematic representation of the tensioning structure used for rolling up a screen from the main viewpoint.

[0025] Figure 3 As shown Figure 2 The diagram shows a cross-sectional view of the AA line used in the tensioning structure for rolling up the screen.

[0026] Figure 4 As shown Figure 2 The diagram shows a cross-sectional view of the BB line used for the tensioning structure of the roll-up screen.

[0027] Figure 5 As shown Figure 1 An exploded view of the tensioning structure used for rolling up the screen.

[0028] Figure 6 As shown Figure 5 The diagram shows a cross-sectional view of the tensioning structure used for rolling up the screen. Detailed Implementation

[0029] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0030] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the application. Unless otherwise defined, the technical or scientific terms used in this application should be understood in their ordinary sense by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "a" or "one," and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. "A plurality" or "several" indicates at least two. Unless otherwise stated, terms such as "front," "rear," "lower," and / or "upper" are for ease of description only and are not limited to a location or spatial orientation. Terms such as "comprising" or "including" indicate that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. Terms such as "connected" or "linked" are not limited to physical or electrical connections and can include electrical connections, whether direct or indirect.

[0031] The singular forms “a,” “the,” and “the” used in this application specification and appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0032] This application provides a tensioning structure for a rollable screen and a rollable screen itself. The tensioning structure includes a roller and a return assembly. The roller is connected to the rollable screen. The return assembly is connected to the roller and includes an inner core assembly, a housing assembly, and a return spring. The inner core assembly is assembled on the housing assembly and connected to the roller. A return cavity exists between the inner core assembly and the housing assembly. The return spring is assembled within the return cavity, with one end connected to the inner core assembly and the other end connected to the housing assembly. Under the action of the return spring, the roller drives the inner core assembly to rotate relative to the housing assembly, thereby tensioning the rollable screen. This application enables tensioning and stretching of the rollable screen at any time, ensuring that the rollable screen maintains a pre-tension force under all circumstances, thus maintaining screen flatness, stability, and reliability.

[0033] With the rapid growth of intelligent and personalized consumer demands and the rapid development of emerging technologies, rollable screens are having a more profound impact on the display technology consumer market and industry. Therefore, this application provides a tensioning structure for rollable screens and a rollable screen itself. The tensioning structure and rollable screen of this application will be described in detail below with reference to the accompanying drawings. Unless otherwise specified, the features in the following embodiments and implementations can be combined with each other.

[0034] The rollable screen provided in this application includes a screen and a tensioning structure 1. The tensioning structure 1 is used to roll up the screen so that the rollable screen can be tensioned at any time, so that the rollable screen can maintain a roll-up preload under any circumstances and keep the screen flat.

[0035] Figure 1 The diagram shown is a structural schematic of one embodiment of the tensioning structure 1 for rolling up and curling screens according to this application. Figure 2 As shown Figure 1 The diagram shown is a schematic diagram of the tensioning structure 1 used for rolling up the screen from the main viewpoint. Figure 3 As shown Figure 2 The diagram shows a cross-sectional view of the AA line of the tensioning structure 1 used for rolling up the screen. Figure 4 As shown Figure 2 The diagram shows a cross-sectional view of the BB line of the tensioning structure 1 used for rolling up the screen. Figure 5 As shown Figure 1 An exploded view of the tensioning structure 1 used for rolling up the screen. Figure 6 As shown Figure 5 The diagram shows a cross-sectional view of the tensioning structure 1 used for rolling up and bending the screen. (Combined with...) Figures 1 to 6 As shown, the tensioning structure 1 includes a roller 10 and a return assembly 20. The roller 10 is connected to a roll-up screen (not shown). The return assembly 20 is connected to the roller 10.

[0036] In some embodiments, the scroll 10 includes a first connecting end 101 and a second connecting end 102 disposed opposite to each other, and a return component 20 is assembled to at least one of the first connecting end 101 and the second connecting end 102. In some embodiments, the return component 20 is assembled to one of the first connecting end 101 and the second connecting end 102. In this embodiment, the return component 20 is assembled to the second connecting end 102, but it is not limited thereto. In this embodiment, the scroll 10 is connected to a screen (not shown), and the screen is tensioned by the tensioning structure 1. This enables the tensioning of the rollable screen.

[0037] In this embodiment, the roller 10 includes a shaft 103 and a mounting protrusion 104 disposed around the shaft 103. The mounting protrusion 104 extends axially along the shaft 103, and the screen is connected to the shaft 103 via the mounting protrusion 104. The shaft 103 can be a cylindrical structure. The axial direction of the shaft 103 can be the longitudinal axis. The shaft 103 is connected to the screen's roller (not shown) via the mounting protrusion 104. Rolling the screen involves winding the screen around the shaft 103. One end of the shaft 103 is inserted into the return assembly 20. When the shaft 103 rotates, the return assembly 20 can provide return torque at any time, thus ensuring that the screen maintains a winding preload under all circumstances, keeping the screen flat.

[0038] exist Figures 1 to 6 In the illustrated embodiment, the return assembly 20 includes an inner core assembly 201, a outer shell assembly 202, and a return coil spring 203. The inner core assembly 201 is assembled onto the outer shell assembly 202 and connected to the scroll 10. The inner core assembly 201 is sleeved within the outer shell assembly 202. A return cavity 204 is provided between the inner core assembly 201 and the outer shell assembly 202. The return coil spring 203 is assembled within the return cavity 204. One end of the return coil spring 203 is connected to the inner core assembly 201, and the other end is connected to the outer shell assembly 202. Thus, under the action of the return coil spring 203, the scroll 10 drives the inner core assembly 201 to rotate relative to the outer shell assembly 202, thereby tensioning the rolled-up screen. In some embodiments, one end of the return coil spring 203 is attached to the outer surface of the inner core assembly 201, and the other end is attached to the inner surface of the outer shell assembly 202. In this embodiment, the return coil spring 203 includes an inner end 2031 and an outer end 2032. The inner end 2031 is located near the inner core assembly 201 and is bonded to the outer surface of the inner core assembly 201. The outer end 2032 is located near the outer shell assembly 202 and is bonded to the inner surface of the outer shell assembly 202 (e.g., ...). Figure 4 (As shown).

[0039] exist Figures 1 to 6 In the illustrated embodiment, the scroll 10 is stationary relative to the inner core assembly 201, but can rotate together with the outer shell assembly 202. Since the two ends (inner end 2031 and outer end 2032) of the return spring 203 are respectively fixed to the outer surface of the inner core assembly 201 and the inner surface of the outer shell assembly 202, when the scroll 10 drives the inner core assembly 201 to rotate relative to the outer shell assembly 202, the return spring 203 will be deformed by force, which can generate a positive rotational torque to make the screen roll up and tighten; and it can also generate a reverse rotational torque to make the screen return and stretch.

[0040] In some embodiments, when the scroll 10 rotates clockwise around its axial direction, the inner core assembly 201 rotates clockwise with the scroll 10, simultaneously causing the return spring 203 to wind clockwise around the axial direction of the scroll 10. At this time, the return spring 203 will deform under force, generating a positive rotational torque, causing the return spring 203 to be wound around the outer surface of the inner core assembly 201, thus tightening the screen. Similarly, when the scroll 10 rotates counterclockwise around its axial direction, the inner core assembly 201 rotates counterclockwise with the scroll 10, simultaneously causing the return spring 203 to wind counterclockwise around the axial direction of the scroll 10. At this time, the return spring 203 will deform under force, generating a reverse rotational torque, causing the return spring 203 to detach from the outer surface of the inner core assembly 201 and wind towards the inner surface of the outer casing assembly 202, thus stretching the screen back to its original position. This allows the rollable screen to be tensioned and stretched at any time, ensuring that it maintains a roll-up preload under all circumstances, thus keeping the screen flat, stable, and reliable.

[0041] exist Figures 1 to 3 In the illustrated embodiment, the inner core assembly 201 is connected to the spool 10 via a keyed connection structure. The keyed connection structure enables circumferential fixation between the spool 10 and the inner core assembly 201 to transmit motion and torque, easily achieving high coaxiality, good centering, stability and reliability, and has fewer parts, a simple structure, and is easy to assemble.

[0042] exist Figure 3 , Figures 5 to 6 In the illustrated embodiment, the inner core assembly 201 includes an inner core 205 and an inner core cover 206 assembled on top of the inner core 205. A scroll 10 passes through the inner core cover 206 and is connected to the inner core 205. In this embodiment, the inner core cover 206 is adhesively fixed to the top of the inner core 205, a simple and reliable fixing method. In this embodiment, both the inner core 205 and the inner core cover 206 are hollow structures, and the scroll 10 is connected to both the inner core 205 and the inner core cover 206 via a keyed connection structure. When the scroll 10 rotates axially around its axis, it drives the inner core 205 and the inner core cover 206 to rotate synchronously around the axis of the scroll 10, resulting in good coaxiality and greater stability and reliability.

[0043] exist Figure 3 , Figures 5 to 6In the illustrated embodiment, the outer casing assembly 202 includes an outer casing 207 and an outer casing cover 208 assembled on top of the outer casing 207 and located outside the inner core cover 206. The outer casing 207 is assembled on the outside of the inner core 205, forming a return cavity 204 between the outer casing 207 and the inner core 205. In this embodiment, the outer casing cover 208 is adhesively fixed to the top of the outer casing 207, a simple and reliable fixing method. In this embodiment, both the outer casing 207 and the outer casing cover 208 are hollow structures, with the outer casing 207 sleeved on the outside of the inner core 205 and the outer casing cover 208 sleeved on the outside of the inner core cover 206. A gap exists between the inner surface of the outer casing 207 and the outer surface of the inner core 205, forming the return cavity 204, which is used to house the return coil spring 203. The inner end of the return spring 203 is bonded and fixed to the outer surface of the inner core 205, and the outer end of the return spring 203 is bonded to the inner surface of the outer shell 207. This fixing method is simple and reliable, and facilitates assembly or maintenance. In this embodiment, the height of the inner core cover 206 is set to be greater than the height of the outer shell cover 208. This allows the roller 10 to pass through the inner core cover 206, resulting in better stability of the connection with the inner core 205, and making it less likely to detach from the outer shell assembly 202 when rotating relative to it.

[0044] exist Figure 3 , Figures 5 to 6 In the illustrated embodiment, the tensioning structure 1 further includes a plurality of rolling elements 30. In this embodiment, the rolling elements 30 may be ball bearings. The plurality of rolling elements 30 are positioned between the inner core assembly 201 and the outer shell assembly 202, serving two purposes: firstly, to space the inner core assembly 201 from the outer shell assembly 202; and secondly, to allow for smooth relative rotation between the inner core assembly 201 and the outer shell assembly. This makes the rotation of the inner core assembly 201 relative to the outer shell assembly 202 by the scroll 10 smoother, resulting in smoother screen scrolling.

[0045] exist Figure 5 and Figure 6 In the illustrated embodiment, the top of the inner core 205 is provided with multiple first positioning grooves 209, and the bottom of the inner core cover 206 is provided with multiple second positioning grooves 210 corresponding to the positions of the multiple first positioning grooves 209. When the inner core cover 206 is assembled onto the inner core 205, the first positioning grooves 209 and the second positioning grooves 210 form a positioning cavity (not shown), and the rolling element 30 is constrained within this positioning cavity in the axial direction of the scroll 10. The axial direction of the scroll 10 can be longitudinal. By setting the first positioning grooves 209 and the second positioning grooves 210, the first positioning grooves 209 and the second positioning grooves 210 together form a positioning cavity, which is used to house the rolling element 30. This allows the rolling element 30 to be constrained in a fixed position, enabling the inner core 205 to rotate smoothly within the outer casing 207, thereby making the screen scrolling smoother. Moreover, this limiting method is simple and easy to assemble or maintain.

[0046] exist Figure 5 and Figure 6 In the illustrated embodiment, the top of the outer casing 207 is provided with a first limiting groove 211 extending circumferentially along the spool 10, and the upper cover 208 of the outer casing is provided with a second limiting groove 212 extending circumferentially along the spool 10. When the upper cover 208 is assembled to the outer casing 207, the first limiting groove 211 and the second limiting groove 212 form a rolling groove (not shown), which communicates with the positioning cavity, and the rolling element 30 is confined within the rolling groove in the radial direction of the spool 10. The circumferential direction of the spool 10 can be a circumferential direction around the axial direction of the spool 10, and the radial direction of the spool 10 can be a horizontal direction. By setting the first limiting groove 211 and the second limiting groove 212, which together form an annular rolling groove, the rolling element 30 can be confined between the outer shell 207 and the inner core 205. When the scroll 10 drives the inner core 205 to rotate, the inner core 205 rotates smoothly relative to the outer shell 207 within the annular rolling groove, thus making the screen scrolling smoother. Furthermore, this limiting method is simple and easy to assemble or maintain.

[0047] exist Figure 3 , Figure 5 and Figure 6 In the illustrated embodiment, the inner core 205 includes an inner core body 213 and a flange 214 protruding from the outer side of the inner core body 213 and extending circumferentially along the inner core body 213. The flange 214 is located at the bottom of the inner core body 213. In this embodiment, the inner core body 213 is a hollow cylindrical structure, and the flange 214 protrudes from the outer side of the inner core body 213 and is located at the bottom of the outer side. Figure 3 , Figure 5 and Figure 6 In the illustrated embodiment, the bottom of the outer casing 207 is provided with a slot 215 for engaging with the flange 214. When the inner core 205 is assembled to the outer casing 207, the flange 214 engages with the slot 215 in the axial and / or radial direction of the spool 10. In this embodiment, the outer casing 207 is a hollow cylindrical structure, and the slot 215 is located at the bottom of the outer casing 207. When the inner core 205 is assembled to the outer casing 207, the flange 214 engages with the slot 215 in the axial and radial direction of the spool 10. This improves the stability of the fixation.

[0048] In this application, the inner core assembly 201 is divided into two parts: the inner core 205 and the inner core cover 206, and the outer shell assembly 202 is divided into two parts: the outer shell 207 and the outer shell cover 208. This arrangement is to facilitate the assembly of the rolling element 30. In actual assembly, firstly, one end of the scroll 10 is connected to the inner core 205. Then, the scroll 10 and the inner core 205 are assembled into the outer shell 207. Next, the return spring 203 is assembled into the outer side of the inner core 205 and the inner side of the outer shell 207. Then, multiple rolling elements 30 are assembled into the corresponding first positioning groove 209 and first limiting groove 211. Then, the inner core cover 206 is sleeved on the scroll 10 and bonded to the top of the inner core 205 to restrict the multiple rolling elements 30 in the fixed positioning cavity. The outer shell cover 208 is sleeved on the periphery of the inner core cover 206 and bonded to the top of the outer shell 207 to restrict the multiple rolling elements 30 in the annular rolling groove between the outer shell 207 and the inner core 205. In this way, when the scroll 10 drives the inner core 205 to rotate, the inner core 205 rotates smoothly relative to the outer shell 207 in the annular rolling groove, making the scrolling of the screen smoother. Furthermore, this assembly method is simple and easy to assemble or maintain.

[0049] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any 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 tensioning structure for a rollable screen, characterized in that, include: A scroll, connected to the rollable screen; and A return assembly, connected to the scroll, includes an inner core assembly, a outer shell assembly, and a return spring; wherein the inner core assembly is assembled on the outer shell assembly and connected to the scroll, a return cavity is provided between the inner core assembly and the outer shell assembly, the return spring is assembled in the return cavity, one end of the return spring is connected to the inner core assembly, and the other end of the return spring is connected to the outer shell assembly; under the action of the return spring, the scroll drives the inner core assembly to rotate relative to the outer shell assembly, thereby rolling up the rollable screen; The inner core assembly includes an inner core and an inner core cover assembled on top of the inner core. The spool passes through the inner core cover and is connected to the inner core.

2. The tensioning structure according to claim 1, characterized in that, The outer casing assembly includes an outer casing and an outer casing cover assembled on top of the outer casing and located outside the inner core cover. The outer casing is assembled on the outside of the inner core and forms the return cavity between the outer casing and the inner core.

3. The tensioning structure according to claim 2, characterized in that, The tensioning structure also includes multiple rolling elements; the top of the inner core is provided with multiple first positioning grooves, and the bottom of the inner core cover is provided with multiple second positioning grooves corresponding to the positions of the multiple first positioning grooves; when the inner core cover is assembled on the inner core, the first positioning grooves and the second positioning grooves form a positioning cavity, and the rolling elements are confined in the positioning cavity in the axial direction of the roll.

4. The tensioning structure according to claim 3, characterized in that, The top of the outer casing is provided with a first limiting groove extending circumferentially along the spool, and the upper cover of the outer casing is provided with a second limiting groove extending circumferentially along the spool. When the upper cover of the outer casing is assembled with the outer casing, the first limiting groove and the second limiting groove form a rolling groove. The rolling groove communicates with the positioning cavity, and the rolling element is confined within the rolling groove in the radial direction of the spool.

5. The tensioning structure according to claim 2, characterized in that, The inner core includes an inner core body and a flange protruding from the outside of the inner core body and extending circumferentially along the inner core body. The flange is located at the bottom of the inner core body. The bottom of the outer shell is provided with a slot that engages with the flange. When the inner core is assembled into the outer shell, the flange engages with the slot in the axial and / or radial direction of the scroll.

6. The tensioning structure according to claim 2, characterized in that, The inner core assembly is connected to the reel via a keyed connection structure; and / or The inner core cover is bonded and fixed to the top of the inner core; and / or The outer casing cover is adhesively fixed to the top of the outer casing; and / or The height of the inner core cover is greater than the height of the outer shell cover.

7. The tensioning structure according to claim 1, characterized in that, One end of the return spring is glued and fixed to the outer surface of the inner core, and the other end of the return spring is glued and fixed to the inner surface of the outer shell; and / or The reel includes a first connecting end and a second connecting end disposed opposite to each other, and the return assembly is assembled to at least one of the first connecting end and the second connecting end.

8. A rollable screen, characterized in that, include: Screen; and The tensioning structure as described in any one of claims 1 to 7, wherein the spool of the tensioning structure is connected to the screen, and the screen is tensioned by the tensioning structure.

9. The rollable screen according to claim 8, characterized in that, The scroll includes a shaft and a mounting protrusion disposed on the periphery of the shaft. The mounting protrusion extends along the axial direction of the shaft, and the screen is connected to the shaft through the mounting protrusion.

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