Multifunctional universal roller shutter middle support
By designing a retractable telescopic adjustment shaft and a toothed shaft structure, the problem of the single function of the roller blind's middle support was solved, enabling flexible function switching and convenient installation, and enhancing the roller blind's leveling function.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO JIESHU WINDOW COVERINGS MFG CO LTD
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-21
AI Technical Summary
The existing roller blind center support has a single function and low flexibility, and cannot simultaneously achieve the functions of one-to-one and one-to-two.
A multifunctional universal roller blind intermediate support was designed, which adopts telescopic first and second telescopic adjustment shafts, as well as toothed shafts and connecting shafts. Through the cooperation of the insertion slot and the insertion tooth part, the function of one-to-one and one-to-two can be switched, and a flat adjustment disc is added to adjust the flatness of the roller blind.
It improves the flexibility of the roller blind's central support, allowing it to switch between one-to-one and one-to-two modes as needed. It is easy to install, more functional, and enhances the roller blind's leveling ability.
Smart Images
Figure CN224149466U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of roller blind intermediate supports, and in particular to a multifunctional universal roller blind intermediate support. Background Technology
[0002] Roller blinds, as common sunshade, light-blocking, and space-dividing devices, are widely used in various architectural spaces. A roller blind center bracket is installed between two adjacent blinds, serving a supporting and transitional function. Existing roller blind center brackets generally include a mounting base that can be fixed to an exterior wall, and a first roller blind head and a second roller blind head installed on either side of the mounting base. The first roller blind head supports one blind, and the second roller blind head supports the other blind.
[0003] Currently, roller blind center brackets come in one-to-one and one-to-two configurations. In the one-to-one configuration, the first and second roller blind heads are not driven and connected, and the curtains on both sides are controlled to rise and fall separately. In the one-to-two configuration, the first and second roller blind heads are driven and connected, and the curtains on both sides are controlled to rise and fall synchronously. However, each roller blind center bracket is limited to only one function, either one-to-one or one-to-two, which is relatively simple and lacks flexibility. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] The problem to be solved by this utility model is to provide a multifunctional and universal roller blind intermediate support to overcome the shortcomings of the existing roller blind intermediate supports which have relatively single functions.
[0006] (II) Technical Solution
[0007] To solve the aforementioned technical problem, this utility model provides a multifunctional universal roller shutter intermediate support, including a fixed base located in the middle and a first control head and a second control head respectively detachably installed on both sides of the fixed base. The first control head includes a retractable first telescopic adjustment shaft and a toothed shaft slidably installed in the first telescopic adjustment shaft. The first telescopic adjustment shaft can be inserted into the fixed base, and a toothed groove adapted to the toothed shaft is provided in the first telescopic adjustment shaft. An insertion groove is provided in the toothed shaft. The second control head includes a retractable second telescopic adjustment shaft. The outer end of the second telescopic adjustment shaft is provided with an insertion tooth portion that mates with the toothed groove. A connecting shaft adapted to the insertion groove is inserted into the insertion tooth portion.
[0008] In some embodiments, the second head further includes a second sleeve, and the second telescopic adjustment shaft is telescopically installed inside the second sleeve; a second spring is installed between the second telescopic adjustment shaft and the second sleeve, and the second spring always causes the second telescopic adjustment shaft to tend to move outward.
[0009] In some embodiments, the second adjusting head further includes a second adjusting disc rotatably installed inside the second sleeve, and the second telescopic adjusting shaft is fitted inside the second adjusting disc; a second rotating disc is provided at one end of the second adjusting disc located outside the second sleeve, and a second spiral guide wall is provided at one end of the second adjusting disc located inside the second sleeve, and a second pressure head that can move along the second spiral guide wall is provided on the outer wall of the second telescopic adjusting shaft.
[0010] In some embodiments, an anti-rotation buckle is installed on the second sleeve, one end of which is hinged to the second sleeve and the other end is engaged with the second sleeve; the anti-rotation buckle is provided with a locking head and a plurality of locking grooves that can engage with the locking head; the second adjusting plate is provided with a second annular groove, and a second screw is installed on the second sleeve, one end of which is placed in the second annular groove.
[0011] In some embodiments, the first control head further includes a torsion spring central shaft, the first telescopic adjustment shaft is telescopically mounted inside the torsion spring central shaft, and a first spring is installed between the torsion spring central shaft and the toothed shaft, the first spring always causing the toothed shaft to tend to move outward.
[0012] In some embodiments, the first adjusting head further includes a first adjusting disk rotatably mounted inside the central shaft of the torsion spring, and the first telescopic adjusting shaft is fitted inside the first adjusting disk; a first rotating disk is provided at one end of the first adjusting disk located outside the central shaft of the torsion spring, and a first spiral guide wall is provided at the other end of the first adjusting disk located inside the central shaft of the torsion spring, and a first pressing head that can move along the first spiral guide wall is provided on the outer wall of the first telescopic adjusting shaft.
[0013] In some embodiments, a flushing adjustment disc is fitted on the outer side of the torsion spring central shaft, and a torsion spring limiting groove is provided on the flushing adjustment disc; a plurality of torsion springs are fitted axially on the torsion spring central shaft, and the two ends of the torsion springs respectively abut against the side wall of the torsion spring limiting groove.
[0014] In some embodiments, a first sleeve is fitted on the outer side of the leveling adjustment disc, and the first sleeve is connected to the central shaft of the torsion spring by fasteners; a limiting protrusion corresponding to the limiting groove of the torsion spring is provided on the inner wall of the first sleeve, and a third rotating disc is provided on the leveling adjustment disc and placed outside the first sleeve.
[0015] In some embodiments, the first adjusting plate is provided with a first annular groove, and a first screw is installed on the central shaft of the torsion spring, with one end of the first screw placed in the first annular groove.
[0016] In some embodiments, the fixing base includes a fixing bracket and a bracket cover that snaps into the fixing bracket. The fixing bracket is provided with a plurality of waist-shaped connecting holes, and the bracket cover is provided with a shaft hole through which the first telescopic adjustment shaft passes.
[0017] (III) Beneficial Effects
[0018] The multifunctional universal roller shutter intermediate support provided by this utility model has the following advantages compared with the prior art:
[0019] 1) Employing a first telescopic adjustment shaft and a second telescopic adjustment shaft, along with toothed shafts and connecting shaft components, it can function as both a one-to-one and a one-to-two device, adjustable according to requirements for greater flexibility. In the one-to-one state, the connecting shaft is inserted into the insertion slot, with the toothed part positioned outside the toothed slot. The first and second telescopic adjustment shafts are disengaged, and each of the two control heads controls one roller blind. In the one-to-two state, the connecting shaft is inserted into the insertion slot, and the second telescopic adjustment shaft extends so that the toothed part is positioned within the toothed slot. The first and second telescopic adjustment shafts are driven and connected, and the two control heads synchronously control two roller blinds.
[0020] 2) The telescopic structure is adopted. During installation, the two telescopic adjustment shafts can be retracted into the innermost part of the head. After the holes are aligned, the two telescopic adjustment shafts can be extended. At this time, the telescopic adjustment shafts can be inserted into the fixed seat, which is convenient for installation.
[0021] 3) A leveling adjustment disc has been added, which enhances the leveling function of the roller shutter, making it more functional and convenient to use. Attached Figure Description
[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the 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.
[0023] Figure 1 This is a perspective view of a multifunctional universal roller shutter center support according to the present invention.
[0024] Figure 2 This is an exploded view of a multifunctional universal roller shutter intermediate support according to this utility model;
[0025] Figure 3 This is a schematic diagram of the structure of a multifunctional universal roller shutter intermediate support in a one-to-one configuration according to the present invention;
[0026] Figure 4 This is a schematic diagram of the structure of a multifunctional universal roller shutter intermediate support in a one-to-two configuration according to the present invention;
[0027] Figure 5 This is a perspective view of the second head of a multifunctional universal roller shutter intermediate support according to this utility model;
[0028] Figure 6 This is an exploded view of the second head of a multifunctional universal roller shutter intermediate support according to this utility model;
[0029] Figure 7 This is a schematic diagram of the structure of the second adjusting plate and anti-rotation buckle connection of the middle support of a multifunctional universal roller blind according to this utility model;
[0030] Figure 8 This is a perspective view of the connection between the second telescopic adjustment shaft and the second adjustment disc of a multifunctional universal roller blind intermediate support according to this utility model.
[0031] Figure 9 This is a perspective view of the first head of a multifunctional universal roller shutter intermediate support according to this utility model;
[0032] Figure 10 This is an exploded view of the first head of a multifunctional universal roller shutter intermediate support according to this utility model;
[0033] Figure 11 This is a perspective view of the connection between the torsion spring central shaft, the torsion spring, and the flat adjustment disc of a multifunctional universal roller blind intermediate support according to this utility model.
[0034] Figure 12 This is a perspective view of the first sleeve of the intermediate support of a multifunctional universal roller shutter according to this utility model.
[0035] Figure 13 This is a schematic diagram of the structure of a multifunctional universal roller blind intermediate support, including the torsion spring central shaft, torsion spring, leveling adjustment disc, and first sleeve connection.
[0036] The component names corresponding to the various reference numerals in the figure are as follows: 1. Fixed base; 11. Fixed bracket; 12. Bracket cover; 101. Waist-shaped connecting hole; 102. Shaft hole; 2. First control head; 21. First telescopic adjustment shaft; 22. Toothed shaft; 23. Torsion spring center shaft; 24. First spring; 25. First adjustment disc; 26. Flush adjustment disc; 27. Torsion spring; 28. First sleeve; 29. Fastener; 211. Toothed groove; 212. First pressure head; 221. Insertion groove; 25. First adjustment disc; 251. First rotating disc; 252. First spiral guide wall; 253. First annular groove; 261. Torsion spring limiting groove; 262. Third rotating disk; 281. Limiting protrusion; 3. Second stop head; 31. Second telescopic adjustment shaft; 32. Connecting shaft; 33. Second sleeve; 34. Second spring; 35. Second adjusting disk; 36. Anti-rotation buckle; 311. Toothed part; 312. Second pressure head; 351. Second rotating disk; 352. Second spiral guide wall; 353. Locking groove; 354. Second annular groove; 36. Anti-rotation buckle; 361. Clamp head. Detailed Implementation
[0037] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.
[0038] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0039] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.
[0040] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.
[0041] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.
[0042] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.
[0043] See Figures 1 to 13 This utility model provides a multifunctional universal roller blind intermediate support, including a fixed base 1 located in the middle and a first control head 2 and a second control head 3 respectively detachably installed on both sides of the fixed base 1. The first control head 2 is installed at one end of a roller blind, and the second control head 3 is installed at one end of an adjacent roller blind.
[0044] See Figures 1 to 4 The first control head 2 includes a retractable first telescopic adjustment shaft 21 and a toothed shaft 22 slidably installed within the first telescopic adjustment shaft 21. The toothed shaft 22 is located at one end outside the first telescopic adjustment shaft 21. The first telescopic adjustment shaft 21 can be inserted into the fixed base 1. The first telescopic adjustment shaft 21 is provided with a toothed groove 211 adapted to the toothed shaft 22, and the toothed shaft 22 is placed within the toothed groove 211. The toothed shaft 22 is provided with an insertion groove 221. The second control head 3 includes a retractable second telescopic adjustment shaft 31. The outer end of the second telescopic adjustment shaft 31 is provided with a toothed portion 311 that mates with the toothed groove 211. The toothed portion 311 can be placed within the toothed groove 211, thereby driving the first telescopic adjustment shaft 21 and the second telescopic adjustment shaft 31 together. A connecting shaft 32 adapted to the insertion groove 221 is inserted into the toothed portion 311, and the connecting shaft 32 can be inserted into the insertion groove 221.
[0045] This structure employs a retractable first telescopic adjustment shaft 21 and a second telescopic adjustment shaft 31, as well as a toothed shaft 22 and a connecting shaft 32, enabling it to function as both a one-to-one and a one-to-two device. It can be adjusted according to requirements, offering greater flexibility. When in a one-to-one state, the connecting shaft 32 is inserted into the insertion slot 221, the toothed portion 311 is positioned outside the toothed slot 211, and the first telescopic adjustment shaft 21 and the second telescopic adjustment shaft 31 are disengaged (e.g., ...). Figure 3As shown), at this time, each of the two control heads controls one roller shutter; when in the one-to-two state, the connecting shaft 32 is inserted into the insertion slot 221, and the second telescopic adjustment shaft 31 extends so that the insertion tooth part 311 is placed in the toothed groove 211, and the first telescopic adjustment shaft 21 and the second telescopic adjustment shaft 31 are driven to connect (as shown). Figure 4 As shown in the diagram, at this time, the two control heads synchronously control the two roller shutters.
[0046] In existing technology, curtain installation requires first installing the mounting bracket onto the wall. Because the distance between the two ends of the mounting bracket is fixed, and the central shafts of the two control heads protrude and cannot extend or retract, the central shafts of the control heads cannot engage with the shaft holes of the mounting bracket, making installation inconvenient. In this application, both control heads use retractable telescopic adjustment shafts. During installation, the telescopic adjustment shafts can be retracted to the innermost part of the control head. After aligning the holes, the telescopic adjustment shafts are then extended, at which point they fit perfectly into the mounting bracket, facilitating installation.
[0047] In some embodiments, such as Figure 3 and Figure 6 As shown, the second control head 3 also includes a second sleeve 33, which is fitted inside the roller shutter. The second telescopic adjustment shaft 31 is telescopically installed inside the second sleeve 33. A second spring 34 is installed between the second telescopic adjustment shaft 31 and the second sleeve 33, and the second spring 34 always causes the second telescopic adjustment shaft 31 to tend to move outward. A first toothed guide portion is provided on the inner end of the second telescopic adjustment shaft 31, and a first toothed guide groove that cooperates with the first toothed guide portion is provided inside the second sleeve 33. Through the cooperation of the first toothed guide portion and the first toothed guide groove, the second telescopic adjustment shaft 31 and the second sleeve 33 can be ensured to rotate synchronously without affecting the telescopic movement of the second telescopic adjustment shaft 31 relative to the second sleeve 33, thus ensuring the reliability of the structure.
[0048] In some embodiments, such as Figure 3 , Figure 6 and Figure 8As shown, the second adjusting head 3 also includes a second adjusting disc 35 rotatably mounted inside the second sleeve 33. A second telescopic adjusting shaft 31 is fitted inside the second adjusting disc 35, and the second adjusting disc 35 is used to adjust the extension and retraction of the second telescopic adjusting shaft 31. A second rotating disc 351 is provided at one end of the second adjusting disc 35 located outside the second sleeve 33, facilitating rotation of the second rotating disc 351. A second spiral guide wall 352 is provided at one end of the second adjusting disc 35 located inside the second sleeve 33, and a second pressure head 312 movable along the second spiral guide wall 352 is provided on the outer wall of the second telescopic adjusting shaft 31. With this structure, when adjusting the second telescopic adjusting shaft 31, rotating the second rotating disc 351 causes the second adjusting disc 35 to rotate, which in turn pushes the second telescopic adjusting shaft 31 inward through the second spiral guide wall 352; when reversing the second rotating disc 351, the second telescopic adjusting shaft 31 is pushed outward under the action of the second spring 34. Its structure is simple and adjustment is convenient. The second spiral guide wall 352 can be formed by splicing multiple spiral guide walls, which allows the second telescopic adjustment shaft 31 to extend and retract in multiple positions, providing a sense of depth and making it convenient to use.
[0049] In some embodiments, such as Figures 5 to 7 As shown, an anti-rotation latch 36 is installed on the second sleeve 33. The anti-rotation latch 36 is used to lock the second sleeve 33 and the second adjusting disc 35. When adjusting the second telescopic adjusting shaft 31, the second adjusting disc 35 can be unlocked; after adjustment, the second adjusting disc 35 can be relocked, so that the second adjusting disc 35, the second telescopic adjusting shaft 31, and the second sleeve 33 can rotate synchronously. One end of the anti-rotation latch 36 is hinged to the second sleeve 33, and the other end of the anti-rotation latch 36 is engaged with the second sleeve 33. The anti-rotation latch 36 is provided with a latch head 361 and multiple locking grooves 353 that can engage with the latch head 361. When locked, the latch head 361 is placed in the locking groove 353; when unlocked, the anti-rotation latch 36 is rotated, and the latch head 361 and the locking groove 353 are disengaged. Figure 3 and Figure 6 As shown, a second annular groove 354 is provided on the second adjusting plate 35, and a second screw is installed on the second sleeve 33, with one end of the second screw placed in the second annular groove 354.
[0050] In some embodiments, such as Figure 3 , Figure 9 and Figure 10As shown, the first control head 2 also includes a torsion spring central shaft 23. A first telescopic adjustment shaft 21 is telescopically installed inside the torsion spring central shaft 23. A first spring 24 is installed between the torsion spring central shaft 23 and the toothed shaft 22. The first spring 24 always causes the toothed shaft 22 to tend to move outward. A second toothed guide portion is provided on the inner end of the first telescopic adjustment shaft 21. A second toothed guide groove that cooperates with the second toothed guide portion is provided inside the torsion spring central shaft 23. Through the cooperation of the second toothed guide portion and the second toothed guide groove, the first telescopic adjustment shaft 21 and the torsion spring central shaft 23 can be ensured to rotate synchronously without affecting the telescopic movement of the first telescopic adjustment shaft 21 relative to the torsion spring central shaft 23, thus ensuring the reliability of the structure.
[0051] In some embodiments, such as Figure 3 and Figure 10 As shown, the first adjusting head 2 also includes a first adjusting disk 25 rotatably mounted within the torsion spring central shaft 23. A first telescopic adjusting shaft 21 is fitted inside the first adjusting disk 25. The first adjusting disk 25 is used to adjust the telescopic extension of the first telescopic adjusting shaft 21. The first adjusting disk 25 and the second adjusting disk 35 have the same structure and the same method of adjusting extension. A first rotating disk 251 is provided at one end of the first adjusting disk 25 located outside the torsion spring central shaft 23 for easy rotation. A first helical guide wall 252 is provided at one end of the first adjusting disk 25 located inside the torsion spring central shaft 23. A first pressure head 212 movable along the first helical guide wall 252 is provided on the outer wall of the first telescopic adjusting shaft 21. During adjustment, rotating the first rotating disk 251 causes the first adjusting disk 25 to rotate, thereby pushing the first telescopic adjusting shaft 21 inward through the first helical guide wall 252. When the first rotating disk 251 is reversed, the first spring 24 pushes the toothed shaft 22, which in turn pushes the first telescopic adjusting shaft 21 outward.
[0052] In some embodiments, such as Figure 3 , Figure 10 and Figure 11 As shown, a leveling adjustment disc 26 is fitted on the outer side of the torsion spring central shaft 23. The leveling adjustment disc 26 is used to adjust the height of the bottom of the roller blind on the first control head 2, thereby making the height of the roller blind on the first control head 2 and the second control head 3 level. The leveling adjustment disc 26 is provided with a torsion spring limiting groove 261. Multiple torsion springs 27 are axially fitted on the torsion spring central shaft 23, and the two ends of the torsion springs 27 respectively abut against the side wall of the torsion spring limiting groove 261. Under normal conditions, the torsion springs 27 are tightly held on the torsion spring central shaft 23.
[0053] In some embodiments, such as Figures 11 to 13As shown, a first sleeve 28 is fitted onto the outer side of the leveling adjustment disc 26. The first sleeve 28 is fitted onto a roller shutter and is connected to the torsion spring central shaft 23 via fasteners 29. A limiting protrusion 281 corresponding to the torsion spring limiting groove 261 is provided on the inner wall of the first sleeve 28, and the limiting protrusion 281 is positioned within the torsion spring limiting groove 261. A third rotating disc 262 is provided on the leveling adjustment disc 26, positioned outside the first sleeve 28 for easy rotation. During leveling, rotating the third rotating disc 262 causes the leveling adjustment disc 26 to rotate. The leveling adjustment disc 26 pushes the end of the torsion spring 27, increasing the inner diameter of the torsion spring 27 and creating a gap between the torsion spring 27 and the torsion spring central shaft 23. At this time, the leveling adjustment disc 26 drives the first sleeve 28 to rotate, thereby adjusting the height of the bottom end of the roller shutter on the first sleeve 28, while the torsion spring central shaft 23 remains stationary. After leveling, the torsion spring 27 returns to its original position and clamps tightly onto the torsion spring central shaft 23. When adjusting the roller blind's height, the first sleeve 28 rotates, and the limiting protrusion 281 of the first sleeve 28 pushes the end of the torsion spring 27, causing the inner diameter of the torsion spring 27 to decrease, and the torsion spring 27 clamps tightly onto the torsion spring central shaft 23. At this time, the first sleeve 28, the leveling adjustment disc 26, the torsion spring central shaft 23, the first telescopic adjustment shaft 21, and the first adjustment disc 25 rotate synchronously. This structure, with the addition of the leveling adjustment disc 26, enhances the roller blind's leveling function, making it more functional and convenient to use.
[0054] In some embodiments, such as Figures 3 to 10 As shown, a first annular groove 253 is provided on the first adjusting plate 25, and a first screw is installed on the torsion spring central shaft 23, with one end of the first screw placed in the first annular groove 253.
[0055] In some embodiments, such as Figure 2 and Figure 3 As shown, the fixing base 1 includes a fixing bracket 11 and a bracket cover 12 that snaps into the fixing bracket 11. The fixing bracket 11 is provided with a plurality of waist-shaped connecting holes 101, which facilitate the screws to pass through and fix the fixing bracket 11 to the wall. The bracket cover 12 is provided with a shaft hole 102 for the first telescopic adjustment shaft 21 to pass through.
[0056] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.
[0057] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A multifunctional universal roller shutter intermediate support, comprising a fixed seat (1) in the middle and a first head (2) and a second head (3) respectively detachably mounted on both sides of the fixed seat (1), characterized in that: The first control head (2) includes a retractable first telescopic adjustment shaft (21) and a toothed shaft (22) slidably installed in the first telescopic adjustment shaft (21). The first telescopic adjustment shaft (21) can be inserted into the fixed base (1). The first telescopic adjustment shaft (21) is provided with a toothed groove (211) adapted to the toothed shaft (22). The toothed shaft (22) is provided with a insertion groove (221). The second control head (3) includes a retractable second telescopic adjustment shaft (31). The outer end of the second telescopic adjustment shaft (31) is provided with a toothed part (311) that cooperates with the toothed groove (211). A connecting shaft (32) adapted to the insertion groove (221) is inserted into the toothed part (311).
2. The multi-functional and universal roller shutter middle support according to claim 1, characterized in that: The second control head (3) also includes a second sleeve (33), and the second telescopic adjustment shaft (31) is telescopically installed inside the second sleeve (33); a second spring (34) is installed between the second telescopic adjustment shaft (31) and the second sleeve (33), and the second spring (34) always makes the second telescopic adjustment shaft (31) tend to move outward.
3. The multi-functional and universal roller shutter middle support according to claim 2, characterized in that: The second control head (3) further includes a second adjusting disc (35) rotatably installed inside the second sleeve (33), and the second telescopic adjusting shaft (31) is fitted inside the second adjusting disc (35); the second adjusting disc (35) is provided with a second rotating disc (351) at one end outside the second sleeve (33), and a second spiral guide wall (352) at one end inside the second sleeve (33); and a second pressure head (312) that can move along the second spiral guide wall (352) is provided on the outer wall of the second telescopic adjusting shaft (31).
4. The multi-functional and universal roller shutter middle support according to claim 3, characterized in that: The second sleeve (33) is equipped with an anti-rotation buckle (36), one end of which is hinged to the second sleeve (33) and the other end is engaged with the second sleeve (33); the anti-rotation buckle (36) is provided with a locking head (361) and a plurality of locking grooves (353) that can engage with the locking head (361); the second adjusting plate (35) is provided with a second annular groove (354), and the second sleeve (33) is equipped with a second screw, one end of which is placed in the second annular groove (354).
5. The multi-functional and universal roller shutter middle support according to claim 1, characterized in that: The first control head (2) also includes a torsion spring central shaft (23), and the first telescopic adjustment shaft (21) is telescopically installed in the torsion spring central shaft (23). A first spring (24) is installed between the torsion spring central shaft (23) and the toothed shaft (22). The first spring (24) always makes the toothed shaft (22) tend to move outward.
6. The multi-functional and universal roller shutter middle support according to claim 5, characterized in that: The first adjusting head (2) further includes a first adjusting disk (25) rotatably mounted inside the torsion spring central shaft (23), and the first telescopic adjusting shaft (21) is fitted inside the first adjusting disk (25); the first adjusting disk (25) is provided with a first rotating disk (251) at one end outside the torsion spring central shaft (23), and a first spiral guide wall (252) at the other end inside the torsion spring central shaft (23); a first pressure head (212) is provided on the outer wall of the first telescopic adjusting shaft (21) and can move along the first spiral guide wall (252).
7. The multi-functional and universal roller shutter middle support according to claim 6, characterized in that: A leveling adjustment disc (26) is fitted on the outer side of the torsion spring central shaft (23), and a torsion spring limiting groove (261) is provided on the leveling adjustment disc (26); a plurality of torsion springs (27) are fitted on the torsion spring central shaft (23) along the axial direction, and the two ends of the torsion springs (27) respectively abut against the side wall of the torsion spring limiting groove (261).
8. The multi-functional and universal roller shutter middle support according to claim 7, characterized in that: The outer side of the leveling adjustment disc (26) is fitted with a first sleeve (28), which is connected to the central shaft (23) of the torsion spring by fasteners (29); the inner wall of the first sleeve (28) is provided with a limiting protrusion (281) corresponding to the limiting groove (261) of the torsion spring, and the leveling adjustment disc (26) is provided with a third rotating disc (262) placed outside the first sleeve (28).
9. The multi-functional and universal roller shutter middle support according to claim 6, characterized in that: The first adjusting plate (25) is provided with a first annular groove (253), and a first screw is installed on the torsion spring central shaft (23), with one end of the first screw placed in the first annular groove (253).
10. The multi-functional and universal roller shutter middle support according to claim 1, characterized in that: The fixed base (1) includes a fixed bracket (11) and a bracket cover (12) that engages with the fixed bracket (11). The fixed bracket (11) is provided with a plurality of waist-shaped connecting holes (101), and the bracket cover (12) is provided with a shaft hole (102) through which the first telescopic adjustment shaft (21) passes.