Roller shutter assembly, roller shutter device and protection device

Abstract

The utility model discloses a roller shutter assembly, a roller shutter device and a protective device, the roller shutter assembly comprises a sleeve, a roller shutter capable of being wound on the periphery of the sleeve, a left torsional spring and a right torsional spring, the left torsional spring and the right torsional spring are arranged in the sleeve, and each of the left torsional spring and the right torsional spring comprises a spiral torsional spring body and a first connecting part and a second connecting part which are arranged at the left end and the right end of the spiral torsional spring body; a mounting part used for connecting the second connecting part of the left torsional spring and the first connecting part of the right torsional spring is arranged in the sleeve, the second connecting part of the left torsional spring and the first connecting part of the right torsional spring are connected to the mounting part, and the first connecting part of the left torsional spring and the second connecting part of the right torsional spring can both extend out of the sleeve; the sleeve is rotatably mounted on the seat body. The reset force of the torsion spring can be distributed at the two ends of the surface of the sleeve, the balance of the roller shutter in the pulling and rolling process is improved, then the roller shutter is pulled out and rolled on the sleeve smoothly, the situation that the roller shutter is dislocated is not prone to occurring, and the service life of the roller shutter assembly is prolonged.

Description

Technical Field

[0001] The utility model relates to the technology of rolling curtain field, in particular to a rolling curtain component, a rolling curtain device and a protective device. Background Art

[0002] Roller blinds are suitable for a variety of places, such as business office buildings, hotels, restaurants, offices, homes (used as gauze curtains), etc. Taking torsion spring roller blinds as an example, when the roller blinds are lowered, depending on the different roller blind fabrics, they can achieve semi-light-shielding, semi-light-transmitting, full light-shielding, UV protection, waterproof and other functions. When not in use, the roller blinds can be automatically retracted through the torsion spring. In the retracted state, the overall volume is small and easy to store.

[0003] The torsion spring roller blind in the prior art includes a sleeve, a cloth, a torsion spring, a rotating shaft and two mounting seats. The cloth is wound around the surface of the sleeve. The two mounting seats are arranged at both ends of the sleeve. The two ends of the rotating shaft are respectively fixed on the two mounting seats. The torsion spring is sleeved outside the rotating shaft. One end of the torsion spring is fixed to the surface of the rotating shaft, and the other end of the torsion spring is fixed to the inner wall of the sleeve. The cloth can be rolled up on the surface of the sleeve under the restoring force of the torsion spring. However, the restoring force of the torsion spring is unevenly distributed at both ends of the sleeve surface, which makes the cloth easily deflected when pulled or rolled up, thereby causing the cloth to be pulled out or rolled up out of place, affecting the normal use of the torsion spring roller blind.

[0004] Therefore, it is necessary to design a new technical solution to solve the above problems. Utility Model Content

[0005] In view of this, the utility model aims to solve the deficiencies in the prior art, and its main purpose is to provide a rolling curtain assembly, a rolling curtain device and a protective device, which provide a left torsion spring and a right torsion spring in the sleeve so that the restoring force of the torsion spring can be distributed at both ends of the sleeve surface, thereby increasing the balance when the rolling curtain is pulled and rolled up, thereby making the rolling curtain smoothly pulled out and rolled up on the sleeve, and less likely to be misplaced, thereby increasing the service life of the rolling curtain assembly, and the left torsion spring and the right torsion spring both have a first connecting portion and a second connecting portion, and a mounting portion is provided in the matching sleeve, which is convenient for the assembly of the left torsion spring and the right torsion spring.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A rolling curtain assembly comprises a sleeve, a rolling curtain that can be wound around the outer circumference of the sleeve, and a left torsion spring and a right torsion spring arranged in the sleeve, wherein the left torsion spring and the right torsion spring each comprise a helical torsion spring body and a first connecting portion and a second connecting portion arranged at the left and right ends of the helical torsion spring body; wherein:

[0008] A mounting portion for connecting the second connecting portion of the left torsion spring and the first connecting portion of the right torsion spring is provided in the sleeve, and the second connecting portion of the left torsion spring and the first connecting portion of the right torsion spring are connected to the mounting portion. The first connecting portion of the left torsion spring and the second connecting portion of the right torsion spring can both extend out of the sleeve and are used to be connected to a seat body for rotatable mounting of the sleeve.

[0009] As a preferred solution, the sleeve corresponds to the mounting portion and is provided with an operating hole for installing the left torsion spring and the right torsion spring. The setting of the operating hole allows the user to use tools to install the second connecting portion of the left torsion spring and the first connecting portion of the right torsion spring on the mounting portion, thereby facilitating the maintenance and replacement of the left torsion spring and the right torsion spring.

[0010] As a preferred embodiment, the sleeve is provided with a left installation cavity and a right installation cavity separated by a partition, the left torsion spring and the right torsion spring are respectively located in the corresponding left installation cavity and right installation cavity, the partition is arranged in the middle of the sleeve, the installation part includes a first connecting member and a second connecting member arranged on the left and right sides of the partition, the second connecting part of the left torsion spring and the first connecting part of the right torsion spring are respectively connected to the first connecting member and the second connecting member.

[0011] As a preferred solution, bearings are provided at both ends of the sleeve, and a winding position for the rolling curtain is formed between the two bearings. The arrangement of the bearings can reduce friction, making the rotation of the sleeve smoother.

[0012] A rolling curtain device comprises a base body and a rolling curtain assembly, wherein the base body is provided with a locking position and two connecting positions, the sleeve is rotatably mounted on the locking position, and the first connecting part of the left torsion spring and the second connecting part of the right torsion spring are respectively connected to the corresponding connecting positions.

[0013] As a preferred embodiment, the base body is provided with a accommodating cavity and a pull-out opening connected to the accommodating cavity, the sleeve is placed in the accommodating cavity, one end of the rolling curtain close to the sleeve is connected to the sleeve, and the end of the rolling curtain away from the sleeve is connected to a handle through the pull-out opening, and the handle is provided with a first fixing part for fixing the rolling curtain after stretching.

[0014] As a preferred solution, the handle can at least partially extend into and be clamped in the drawer opening, or a fixing portion is provided at the lower end of the drawer opening, and the handle can be selectively fixed to the fixing portion. The arrangement of the handle at least partially being clamped in the drawer opening or the handle being selectively fixed to the fixing portion can avoid the handle from shaking and making abnormal noises when stored, and the arrangement of the handle being clamped in the drawer opening makes the rolling curtain device more compact when not in use, which is conducive to the miniaturized design of the rolling curtain device, and can block the drawer opening to prevent foreign objects from entering.

[0015] As a preferred solution, the handle includes a connecting portion and a handle portion, one end of the rolling blind away from the sleeve is connected to the connecting portion, and the handle portion is exposed outside the drawer opening.

[0016] As a preferred solution, the pull-out opening is arranged obliquely downward, and the handle can be arranged obliquely downward corresponding to the pull-out opening under the action of the restoring force of the left torsion spring and the right torsion spring, so that the user can pull the handle more smoothly when using it, and the roller blind will not bend too much at the pull-out opening when pulling it downward for use.

[0017] A protective device comprises a shell and the rolling curtain device arranged at one end of the shell, the shell is provided with a receiving groove, and the rolling curtain can cover or open the receiving groove.

[0018] As a preferred embodiment, at least one of the end of the shell body close to the rolling curtain device and the end of the shell body away from the rolling curtain device is provided with a limited positioning, and the limited position is provided with a first fixing piece, and the end of the rolling curtain away from the sleeve is provided with a second fixing piece that is detachably matched with the first fixing piece, and the rolling curtain is detachably matched with the second fixing piece through the first fixing piece to cover or open the accommodating groove.

[0019] As a preferred solution, the shell is provided with a sliding groove for the roller blind to pass through on the side of the accommodating groove, and the roller blind is slidably arranged in the sliding groove. The roller blind can pass through the sliding groove, so that the roller blind can well cover the accommodating groove when the shell is placed horizontally or vertically.

[0020] As a preferred solution, the shell is provided with a step portion protruding from the periphery of the accommodating groove, the sliding groove is arranged on the step portion, and the rolling curtain can fit the step portion. The arrangement of the step portion can ensure that the rolling curtain can fit the step portion, thereby completely covering the accommodating groove.

[0021] As a preferred solution, the roller blind is a transparent waterproof film.

[0022] Compared with the prior art, the utility model has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical solution that:

[0023] Mainly, by arranging a left torsion spring and a right torsion spring in the sleeve, the restoring force of the torsion spring can be distributed at both ends of the sleeve surface, thereby increasing the balance when the rolling curtain is pulled and rolled up, and thus making the rolling curtain smoothly pulled out and rolled up on the sleeve, and less likely to be misplaced, thereby increasing the service life of the rolling curtain assembly. The left torsion spring and the right torsion spring both have a first connecting portion and a second connecting portion, and a mounting portion is arranged in the matching sleeve, which is convenient for the assembly of the left torsion spring and the right torsion spring.

[0024] In order to more clearly illustrate the structural features and functions of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional schematic diagram of a rolling shutter assembly provided by a preferred embodiment of the utility model;

[0026] Figure 2 It is an exploded schematic diagram of a sleeve provided in a preferred embodiment of the utility model;

[0027] Figure 3 It is a cross-sectional schematic diagram of a rolling shutter assembly provided by a preferred embodiment of the utility model;

[0028] Figure 4 It is a three-dimensional schematic diagram of a rolling curtain device provided by a preferred embodiment of the utility model;

[0029] Figure 5 It is a cross-sectional schematic diagram of a rolling curtain device provided by a preferred embodiment of the utility model;

[0030] Figure 6 It is another three-dimensional schematic diagram of the rolling curtain device provided by the preferred embodiment of the utility model;

[0031] Figure 7 It is a three-dimensional schematic diagram of a protective device provided by a preferred embodiment of the utility model;

[0032] Figure 8 It is an exploded schematic diagram of the protective device provided by the preferred embodiment of the utility model;

[0033] Fig. 9 It is a three-dimensional schematic diagram of another viewing angle of the protective device provided by the preferred embodiment of the utility model;

[0034] Fig.10 It is a cross-sectional schematic diagram of a protective device provided by a preferred embodiment of the utility model.

[0035] Description of the accompanying drawings:

[0036] 10. Sleeve 11. Installation part

[0037] 111. first connecting member 112. second connecting member

[0038] 12. Partition 101, left installation cavity

[0039] 102, right installation cavity 103, operation hole

[0040] 104, installation position 105, winding position

[0041] 20. Roller blinds 21. Handle

[0042] 31. Left torsion spring 32. Right torsion spring

[0043] 301, helical torsion spring body 302, first connecting portion

[0044] 303, second connecting portion 40, bearing

[0045] 50. Seat body 501. Connection position

[0046] 502, accommodating cavity 503, drawer opening

[0047] 60. Second fastening member 70. Housing

[0048] 71. Step 72. L-shaped rib

[0049] 701, receiving groove 702, limiting position

[0050] 703, slide groove 80, matching structure. DETAILED DESCRIPTION

[0051] First of all, it should be noted that in the description of the present invention, the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as a limitation on the present invention.

[0052] Please refer to Figures 1 to 3 As shown, it shows the specific structure of the rolling shutter assembly provided by the preferred embodiment of the utility model, which includes a sleeve 10, a rolling shutter 20 that can be wound around the outer periphery of the sleeve 10, and a left torsion spring 31 and a right torsion spring 32 arranged in the sleeve 10.

[0053] The left torsion spring 31 and the right torsion spring 32 each include a helical torsion spring body 301 and a first connecting portion 302 and a second connecting portion 303 arranged at the left and right ends of the helical torsion spring body 301; a mounting portion 11 for connecting the second connecting portion 303 of the left torsion spring 31 and the first connecting portion 302 of the right torsion spring 32 is arranged in the sleeve 10, the second connecting portion 303 of the left torsion spring 31 and the first connecting portion 302 of the right torsion spring 32 are connected to the mounting portion 11, the first connecting portion 302 of the left torsion spring 31 and the second connecting portion 303 of the right torsion spring 32 can both extend out of the sleeve 10 and be used to connect to the seat body 50 for rotatable mounting of the sleeve 10; wherein the first connecting portion 302 and the second connecting portion 303 can both be buckles with an opening.

[0054] For further information, see Figure 1 and Figure 3 As shown, the sleeve 10 is provided with a left installation cavity 101 and a right installation cavity 102 separated by a partition 12, the left torsion spring 31 and the right torsion spring 32 are respectively located in the corresponding left installation cavity 101 and the right installation cavity 102, the partition 12 is arranged in the middle of the sleeve 10, the installation portion 11 includes a first connecting member 111 and a second connecting member 112 arranged on the left and right sides of the partition 12, the second connecting portion 303 of the left torsion spring 31 and the first connecting portion 302 of the right torsion spring 32 are respectively connected On the first connecting member 111 and the second connecting member 112, the sleeve 10 is provided with an operating hole 103 for installing the left torsion spring 31 and the right torsion spring 32 corresponding to the mounting portion 11. The operating hole 103 can completely penetrate the sleeve 10, or only expose the hook 11. The setting of the operating hole 103 enables the user to install the second connecting portion 303 of the left torsion spring 31 and the first connecting portion 302 of the right torsion spring 32 on the mounting portion by using a tool, so as to facilitate the maintenance and replacement of the left torsion spring 31 and the right torsion spring 32.

[0055] Among them, the partition 12 can completely separate the left installation cavity 101 and the right installation cavity 102, and can also be set to incompletely separate the left installation cavity 101 and the right installation cavity 102; in some other embodiments, the partition 12 can be two arranged at a distance, and the first connecting member 111 and the second connecting member 112 are respectively arranged on the two partitions 12.

[0056] Preferably, bearings 40 are sleeved on both ends of the sleeve 10, and a winding position 105 for winding the roller blind 20 is formed between the two bearings 40. The setting of the bearings 40 can reduce friction, so that the rotation of the sleeve 10 is smoother. Installation positions 104 are provided at both ends of the sleeve 10, and the bearings 40 are sleeved at the installation positions 104.

[0057] The material of the rolling curtain 20 can be a waterproof transparent film, an anti-glare film, a sun-proof transparent film, a dust-proof cloth, a sunshade cloth, etc. The user can select the corresponding material of the rolling curtain 20 according to the specific place of use.

[0058] Please refer to Figures 4 to 6 As shown, it shows the specific structure of the rolling curtain device provided by the preferred embodiment of the utility model, which includes a seat body 50 and the rolling curtain assembly described above.

[0059] The seat body 50 is provided with a locking position (not shown in the figure) and two connecting positions 501, and the sleeve 10 can be rotatably installed on the locking position. The first connecting part 302 of the left torsion spring 31 and the second connecting part 303 of the right torsion spring 32 are respectively connected to the corresponding connecting positions 501.

[0060] See also Figure 5 and Figure 6As shown, the seat body 50 is provided with a receiving cavity 502 and a drawing opening 503 communicating with the receiving cavity 502, the sleeve 10 is placed in the receiving cavity 502, the end of the rolling curtain 20 close to the sleeve 10 is connected to the sleeve 10, and the end of the rolling curtain 20 away from the sleeve 10 passes through the drawing opening 503 and is connected to the handle 21, and the handle 21 can at least partially extend into and be clamped in the drawing opening 503, or, the lower end of the drawing opening 503 is provided with a fixing portion (not shown in the figure) The handle can be selectively fixed to the fixing portion, and the handle and the fixing portion can be fixed by magnetic attraction or snap fit, etc. The handle 21 can at least partially be clamped in the draw-out opening 503 or the handle 21 can be selectively fixed to the fixing portion, which can prevent the handle 21 from shaking and making abnormal noises when stored, and the handle 21 can be clamped in the draw-out opening 503, so that the rolling curtain device is more compact when not in use, which is conducive to the miniaturized design of the rolling curtain device, and can block the draw-out opening to prevent foreign objects from entering;

[0061] Among them, the handle 21 is provided with a first fixing part (not shown in the figure) for fixing the roller blind 20 after being stretched. The first fixing part can be 3M glue, suction cup, washing glue, nail, pull rope, magnet, Velcro, etc. arranged on the handle 21, but it is not limited to this, as long as it can achieve the fixing of the roller blind 20 after being stretched.

[0062] Specifically, the handle 21 includes a connecting portion 211 and a handle portion 212, and one end of the rolling blind 20 away from the sleeve 10 is connected to the connecting portion 211, and the handle portion 212 is exposed outside the pull-out opening 503; preferably, the pull-out opening 503 is arranged obliquely downward, and the handle 21 can be arranged obliquely downward corresponding to the pull-out opening 503 under the action of the restoring force of the left torsion spring 31 and the right torsion spring 32, so that the user can pull the handle 21 more smoothly during use, and when pulling downward for use, the rolling blind 20 will not bend too much at the pull-out opening 503.

[0063] In this embodiment, the seat body 50 is a storage seat for the sunshade, and the seat body 50 is provided with a second fixing component 60 for fixing the seat body 50. The second fixing component 60 can be a structure such as adhesive, Velcro, buckle, nail, etc. The sunshade can be a household sunshade, a car sunshade, etc.

[0064] Please refer to Figures 7 to 10 As shown, it shows the specific structure of the protective device provided by the preferred embodiment of the utility model, which includes a shell 70 and the rolling shutter device arranged at one end of the shell 70.

[0065] The housing 70 is provided with a receiving groove 701, and the rolling curtain 20 can cover or open the receiving groove 701. Specifically, of the end of the housing 70 close to the rolling curtain device and the end of the housing 70 away from the rolling curtain device, at least the end of the housing 70 away from the rolling curtain device is provided with a limited positioning 702, and the limited positioning 702 is provided with a first fixing member (not shown in the figure), and the end of the rolling curtain 20 away from the sleeve 10 is provided with a second fixing member (not shown in the figure) detachably matched with the first fixing member, and the rolling curtain 20 is detachably matched with the second fixing member through the first fixing member to cover or open. The housing 701 is opened, and the housing 70 is provided with a slide groove 703 for the roller blind 20 to pass through in the housing 701. The roller blind 20 is slidably arranged in the slide groove 703. The roller blind 20 can pass through the slide groove 703, so that the roller blind 20 can well cover the housing 701 when the housing 70 is placed horizontally or vertically. The first fixing member and the second fixing member can both be a magnetic matching structure, an adhesive matching structure, a Velcro matching structure, and a snap-fit ​​matching structure; the seat body 50 of the roller blind device can be integrally connected with the housing 70, or can be a detachable connection or other fixed connection method; wherein the second fixing member is arranged on the handle 21;

[0066] In the present embodiment, no limiting position is provided at the end of the shell 70 close to the rolling curtain device, and the handle 21 can be clamped in the pull-out opening of the rolling curtain device. In some other embodiments, the limiting position 702 may also be provided at the end of the shell 70 close to the rolling curtain device, so that the handle 21 can be fixed in the end of the slide groove 703 close to the rolling curtain device when the rolling curtain is in the open state.

[0067] See also Figure 8 and Fig.10 As shown, the shell 70 is provided with a step portion 71 on the open periphery of the accommodating groove 701, and the top of the step portion 71 is provided with L-shaped retaining edges 72 on both sides of the accommodating groove 701. The top of the step portion 71 and the L-shaped retaining edges 72 form the slide groove 703, and the L-shaped retaining edges 72 are integrally extended from the step portion 71. The groove depth of the slide groove 703 is greater than the thickness of the first fixing member, so that the first fixing member can slide smoothly in the slide groove 703, and the covering limit position 703 is located on the side of the step portion 71. When the handle 21 is fixed at the covering limit position 703, the rolling curtain 20 can fit the step portion 71. The setting of the step portion 71 can ensure that the rolling curtain 20 can fit the step portion 71, thereby completely covering the accommodating groove 701.

[0068] In this embodiment, the shell 70 is the box body of the bathroom mobile phone waterproof box, the roller blind 20 is a transparent waterproof film, and an elastic member can be arranged in the box body. The elastic member can be a spring, a silicone pad, a sponge pad, a silicone protrusion, etc. By arranging the elastic member, the screen of the electronic device placed in the box body can be close to the transparent waterproof film, which is convenient for touch screen operation; the shell 70 is provided with a matching structure 80 for connecting to the wall, and the matching structure 80 can adopt an adhesive or magnetic structure to fix the shell 70 on the wall, or it can be a ball head matching structure, a card slot card matching structure, a shaft rotation connection structure, etc. In some other embodiments, the shell 70 can be a clamping bracket.

[0069] The design focus of this utility model is:

[0070] Mainly, by arranging a left torsion spring and a right torsion spring in the sleeve, the restoring force of the torsion spring can be distributed at both ends of the sleeve surface, thereby increasing the balance when the rolling curtain is pulled and rolled up, and thus making the rolling curtain smoothly pulled out and rolled up on the sleeve, and less likely to be misplaced, thereby increasing the service life of the rolling curtain assembly. The left torsion spring and the right torsion spring both have a first connecting portion and a second connecting portion, and a mounting portion is arranged in the matching sleeve, which is convenient for the assembly of the left torsion spring and the right torsion spring.

[0071] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A rolling shutter assembly, characterized in that: The invention comprises a sleeve, a rolling curtain that can be wound around the outer circumference of the sleeve, and a left torsion spring and a right torsion spring arranged in the sleeve, wherein the left torsion spring and the right torsion spring each comprise a helical torsion spring body and a first connecting portion and a second connecting portion arranged at the left and right ends of the helical torsion spring body; wherein: A mounting portion for connecting the second connecting portion of the left torsion spring and the first connecting portion of the right torsion spring is provided in the sleeve, and the second connecting portion of the left torsion spring and the first connecting portion of the right torsion spring are connected to the mounting portion. The first connecting portion of the left torsion spring and the second connecting portion of the right torsion spring can both extend out of the sleeve and are used to be connected to a seat body for rotatable mounting of the sleeve.

2. A rolling shutter assembly according to claim 1, characterized in that: The sleeve corresponding installation part is provided with an operation hole for installing the left torsion spring and the right torsion spring.

3. A rolling shutter assembly according to claim 1, characterized in that: The sleeve is provided with a left installation cavity and a right installation cavity separated by a partition, the left torsion spring and the right torsion spring are respectively located in the corresponding left installation cavity and right installation cavity, the partition is arranged in the middle of the sleeve, the installation part includes a first connecting member and a second connecting member arranged on the left and right sides of the partition, the second connecting part of the left torsion spring and the first connecting part of the right torsion spring are respectively connected to the first connecting member and the second connecting member.

4. A rolling shutter assembly according to claim 1, characterized in that: Both ends of the sleeve are sleeved with bearings, and a winding position for the rolling curtain to be wound is formed between the two bearings.

5. A rolling curtain device, characterized in that: It comprises a seat body and a rolling shutter assembly as claimed in any one of claims 1 to 4, wherein the seat body is provided with a locking position and two connecting positions, the sleeve is rotatably mounted on the locking position, and the first connecting part of the left torsion spring and the second connecting part of the right torsion spring are respectively connected to the corresponding connecting positions.

6. A rolling curtain device according to claim 5, characterized in that: The seat body is provided with a accommodating cavity and a pull-out opening connected to the accommodating cavity, the sleeve is placed in the accommodating cavity, one end of the rolling curtain close to the sleeve is connected to the sleeve, and the end of the rolling curtain away from the sleeve is connected to a handle through the pull-out opening, and the handle is provided with a first fixing member for fixing the rolling curtain after stretching.

7. A rolling curtain device according to claim 6, characterized in that: At least a portion of the handle can be inserted into and clamped in the drawer opening, or a fixing portion is provided at the lower end of the drawer opening, and the handle can be selectively fixed to the fixing portion.

8. The rolling curtain device according to claim 6, characterized in that: The handle comprises a connecting portion and a handle portion, one end of the rolling blind away from the sleeve is connected to the connecting portion, and the handle portion is exposed outside the drawer opening.

9. The rolling curtain device according to claim 6, characterized in that: The draw-out opening is arranged obliquely downward, and the handle can be arranged obliquely downward corresponding to the draw-out opening under the action of the restoring force of the left torsion spring and the right torsion spring.

10. A protective device, characterized in that: The roller blind device comprises a shell and a roller blind device as claimed in claim 5 arranged at one end of the shell, wherein the shell is provided with a receiving groove, and the roller blind can cover or open the receiving groove.

11. The protective device according to claim 10, characterized in that: Of the end of the shell close to the rolling curtain device and the end of the shell away from the rolling curtain device, at least the end of the shell away from the rolling curtain device is provided with a limited positioning, and the limited position is provided with a first fixing piece, and the end of the rolling curtain away from the sleeve is provided with a second fixing piece that can be detachably matched with the first fixing piece, and the rolling curtain can be detachably matched with the second fixing piece through the first fixing piece to cover or open the accommodating groove.

12. The protective device according to claim 10, characterized in that: The shell is provided with a sliding groove for the rolling curtain to pass through at the side of the accommodating groove, and the rolling curtain is slidably arranged in the sliding groove.

13. The protective device according to claim 12, characterized in that: The shell is provided with a step portion protruding from the periphery of the accommodating groove, the sliding groove is arranged on the step portion, and the rolling blind can fit the step portion.

14. The protective device according to claim 12, characterized in that: The rolling curtain is a transparent waterproof film.

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