End cover structure of tubular motor and electric curtain

Abstract

The utility model discloses an end cover structure of a tubular motor and an electric curtain, the end cover structure comprises an end cover body and a protruding part formed by extending inwards from the end cover body, and a cavity for a wire to pass through is formed in the middle of the protruding part. The electric curtain uses the end cover structure of the tubular motor. According to the utility model, the wire is arranged at the rotation center relative to the tubular motor, and when the tubular motor encounters resistance, the wire in the tubular motor is located at the rotation center, so that the rotation resistance brought by the wire is reduced to the greatest extent, and the rebounding sensitivity of the tubular motor encountering resistance can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of tubular motor technology, and in particular to an end cap structure for a tubular motor and an electric curtain. Background Technology

[0002] Current electric blinds, such as roller blinds and electric curtains, can all use tubular motors as their power output mechanism. However, existing tubular motors require a central shaft, on which a sensor element is installed to trigger a rebound mechanism upon encountering resistance. Because the shaft occupies space in the middle, the wiring of existing tubular motors uses an eccentric design, located on the side inside the motor.

[0003] The wires arranged on the side will generate a certain amount of oscillation resistance when the tubular motor is resisted and rotated, affecting the sensitivity of the tubular motor's resistance rebound. Utility Model Content

[0004] This invention provides an end cap structure and an electric curtain for a tubular motor, which solves the problem that existing wires generate a certain amount of swing resistance when the tubular motor is resisted and rotated, affecting the sensitivity of the tubular motor's resistance rebound.

[0005] This utility model provides an end cap structure for a tubular motor, including an end cap body and a protrusion extending inward from the end cap body, wherein a cavity through which a power supply line passes is formed in the middle of the protrusion.

[0006] Furthermore, the protrusion includes an annular peripheral wall, which forms the cavity in the middle.

[0007] Furthermore, the protrusion forms a first opening on the inner end face of the annular peripheral wall, through which the first branch of the power supply line extends.

[0008] Furthermore, the protrusion forms a second opening on the side wall surface of the annular peripheral wall, through which the second branch of the power supply line extends.

[0009] Furthermore, the second opening is located at the inner end face of the annular peripheral wall, so that the first opening and the second opening are connected.

[0010] Furthermore, the end cap body includes an outer wall surface, on which an inlet for the power supply line to enter is provided.

[0011] Furthermore, a seat is provided between the end cap body and the protrusion, the protrusion extends inward from the seat, and a clearance cavity is formed in the seat, the clearance cavity connecting the inlet and the cavity.

[0012] Furthermore, the end cap structure also includes a limiting protrusion extending radially from the annular peripheral wall, the limiting protrusion being used to cooperate with a rotating protrusion on the rotating sleeve to limit the rotation stroke of the rotating sleeve.

[0013] Furthermore, the limiting protrusion includes a bottom edge and two side edges, and the cross-sectional profile formed by the bottom edge and the two side edges is fan-shaped.

[0014] Furthermore, each of the limiting protrusions has a mounting surface symmetrically provided on its two sides for fixing the elastic element, and the mounting surface includes a mounting portion that defines the elastic element.

[0015] Furthermore, the number of the limiting protrusions is two or three, and the limiting protrusions are evenly distributed in the circumferential direction.

[0016] Furthermore, the limiting protrusion is fan-shaped and is evenly distributed in the circumferential direction.

[0017] Furthermore, the end cap structure also includes a limiting protrusion extending radially from the annular peripheral wall. The limiting protrusion is used to cooperate with a rotating protrusion on the rotating sleeve to limit the rotation stroke of the rotating sleeve. The limiting protrusion includes two first limiting protrusions and a second limiting protrusion. The first limiting protrusions extend to the inner end face of the annular peripheral wall, and the second limiting protrusion extends to the second opening.

[0018] Furthermore, the two first limiting protrusions are provided with mounting surfaces for fixing the elastic element, and the mounting surfaces include mounting portions that define the elastic element.

[0019] Furthermore, each of the first limiting protrusions is symmetrically provided with a mounting surface for fixing the elastic element, and the mounting surface includes a mounting portion that defines the elastic element.

[0020] Furthermore, the second limiting protrusion forms a clearance step on the outer end face, and the clearance step extends from the second opening toward the seat body.

[0021] Another aspect of this utility model embodiment provides an electric curtain, including the end cap structure of the tubular motor described in any of the above embodiments.

[0022] Another aspect of this utility model embodiment provides an electric curtain, including the end cap structure of the tubular motor described in any of the above claims, and a rotating sleeve disposed around the end cap structure. The rotating sleeve is provided with a rotating protrusion at a corresponding position of the limiting protrusion, and the rotating protrusion and the limiting protrusion are arranged at intervals in the circumferential direction.

[0023] Another aspect of this utility model embodiment provides an electric curtain, including the end cap structure of the tubular motor as described in any one of the claims, and also including a rotating sleeve disposed around the end cap structure. The rotating sleeve is provided with a rotating protrusion at the corresponding position of the limiting protrusion, and the rotating protrusion and the limiting protrusion are arranged at intervals in the circumferential direction.

[0024] The rotating protrusion includes a first rotating protrusion and two second rotating protrusions. The first rotating protrusion is disposed between the two first limiting protrusions. The electric curtain also includes an elastic element disposed between the first rotating protrusion and the second limiting protrusion.

[0025] The second rotating protrusion is positioned between the first limiting protrusion and the second limiting protrusion.

[0026] This utility model embodiment provides a protrusion extending inward from the end cap body, and forms a cavity in the middle of the protrusion through which the power supply line passes, so that the wire is arranged at the rotation center relative to the tubular motor. When the tubular motor is resisted, the wire in the tubular motor is located at the rotation center, so as to minimize the rotational resistance brought by the wire and effectively improve the sensitivity of the tubular motor to resisting rebound. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a perspective view of the end cap structure of the tubular motor in the second and fourth embodiments of this utility model;

[0029] Figure 2 yes Figure 1 A three-dimensional view of the end cap structure from another perspective;

[0030] Figure 3 yes Figure 1 Another cross-sectional view of the end cap structure, the cross-section of which is located in a vertical plane and passes through the central axis;

[0031] Figure 4 These are exploded views of the end cap structure and rotating sleeve of the tubular motor in the second and seventh embodiments of this utility model;

[0032] Figure 5 This is a cross-sectional view of the tubular motor end cap structure and rotating sleeve assembled in the second and seventh embodiments of this utility model. The cross-section in the figure is located in a vertical plane and is close to the first opening.

[0033] Figure 6 This is a frontal cross-sectional view of the rotating sleeve in the second and seventh embodiments of this utility model. The cross-section in the figure is located in a vertical plane and is located in the middle of the first rotating protrusion.

[0034] Figure 7 This is a cross-sectional view of the end cap structure of the tubular motor and the rotating sleeve installed behind the tubular motor in the second and seventh embodiments of this utility model. The cross-section in the figure is located in a vertical plane and is close to the first opening.

[0035] Figure 8 This is a cross-sectional view of the end cap structure and rotating sleeve of the tubular motor installed behind the tubular motor in the second and seventh embodiments of this utility model. The cross-section in the figure is located in a vertical plane and passes through the central axis. The figure also shows a partial enlarged view near the end cap structure.

[0036] Figure 9 This is an exploded view of the end cap structure and rotating sleeve of the tubular motor in the third embodiment of this utility model;

[0037] Figure 10 This is a cross-sectional view of the end cap structure of the tubular motor and the rotating sleeve installed behind the tubular motor in the third embodiment of this utility model. The cross-section in the figure is located in a vertical plane and is close to the first opening.

[0038] Figure 11 This is a cross-sectional view of the end cap structure of the tubular motor and the rotating sleeve installed behind the tubular motor in the third embodiment of this utility model. The cross-section in the figure is located in a vertical plane and passes through the central axis.

[0039] Figure 12 This is an exploded view of the end cap structure and rotating sleeve of the tubular motor in the fourth embodiment of this utility model;

[0040] Figure 13 This is a cross-sectional view of the end cap structure of the tubular motor and the rotating sleeve installed behind the tubular motor in the fourth embodiment of this utility model. The cross-section in the figure is located in a vertical plane and is close to the first opening.

[0041] Figure 14 This is a cross-sectional view of the end cap structure of the tubular motor and the rotating sleeve installed behind the tubular motor in the fourth embodiment of this utility model. The cross-section in the figure is located in a vertical plane and passes through the central axis.

[0042] Figure 15 This is a cross-sectional view of the end cap structure of the tubular motor and the rotating sleeve installed behind the tubular motor in the fifth embodiment of this utility model. The cross-section in the figure is located in a vertical plane and is close to the first opening.

[0043] Figure 16 This is a cross-sectional view of the end cap structure of the tubular motor and the rotating sleeve installed behind the tubular motor in the fifth embodiment of this utility model. The cross-section in the figure is located in a vertical plane and passes through the central axis. Detailed Implementation

[0044] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0045] When ordinal numbers such as "first" and "second" are mentioned in the embodiments of this utility model, unless they actually express the meaning of order according to the context, they should be understood as being used only for differentiation.

[0046] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0047] First embodiment:

[0048] This embodiment provides an end cap structure for a tubular motor, including an end cap body and a protrusion extending inward from the end cap body, wherein a cavity through which a power supply line passes is formed in the middle of the protrusion.

[0049] In this embodiment, the protrusion is directly connected to the end cap body, and the cavity extends inward along the length of the protrusion. The shape of the cavity includes, but is not limited to, a cylinder, a cube, a frustum, a square frustum, or a prism.

[0050] This utility model embodiment provides a protrusion extending inward from the end cap body, and forms a cavity in the middle of the protrusion through which the power supply line passes, so that the wire is arranged at the rotation center relative to the tubular motor. When the tubular motor is resisted, the wire in the tubular motor is located at the rotation center, so as to minimize the rotational resistance brought by the wire and effectively improve the sensitivity of the tubular motor to resisting rebound.

[0051] Second embodiment:

[0052] Please refer to Figures 1 to 8 As shown, this embodiment provides an end cap structure for a tubular motor, including an end cap body 1 and a protrusion 2 extending inward from the end cap body 1, wherein a cavity 21 through which a power supply line 6 passes is formed in the middle of the protrusion 2.

[0053] As a preferred embodiment, and not a limitation, the protrusion 2 includes a central axis and an annular peripheral wall 22 disposed along the central axis, the annular peripheral wall 22 forming the cavity 21 in the middle. For example, the cross-sectional shape of the annular peripheral wall 22 is circular, and the shape of the cavity 21 is cylindrical.

[0054] As a preferred embodiment, and not a limitation, the protrusion 2 forms a first opening 221 on the inner end face of the annular peripheral wall 22, through which the first branch 61 of the power supply line 6 extends. The protrusion 2 also forms a second opening 222 on the side wall surface of the annular peripheral wall 22, through which the second branch 62 of the power supply line 6 extends. Specifically, the second opening 222 is located at the inner end face of the annular peripheral wall 22, so that the first opening 221 and the second opening 222 communicate.

[0055] In this embodiment, the first branch 61 of the wire 6 is used to connect to the internal circuit elements of the tubular motor. For example, the internal circuit elements include, but are not limited to, the circuit board 8 and related components. The second branch 62 of the wire 6 is used to extend to the outside of the rotating sleeve 5 and be fixed. By connecting the first opening 221 and the second opening 222, this embodiment simplifies the end cap structure and facilitates the wiring of the first branch 61 and the second branch 62 of the wire 6.

[0056] As a specific embodiment and not a limitation, the end cap body 1 includes an outer wall surface 11, on which an inlet 12 for the power supply line is provided. A seat 3 is also provided between the end cap body 1 and the protrusion 2, the protrusion 2 extending inward from the seat 3. A clearance cavity 31 is formed within the seat 3, the clearance cavity 31 connecting the inlet 12 and the cavity 21. In this embodiment, the seat 3 is disposed on the inner end face of the end cap body 1, and the inner end face of the end cap body 1 is also used for assembly and alignment with the rotating sleeve 5.

[0057] As a preferred option and not a limitation, the end cap structure also includes a limiting protrusion 4 extending radially from the annular peripheral wall 22, the limiting protrusion 4 being used to cooperate with a rotating protrusion 51 on the rotating sleeve 5 to limit the rotational stroke of the rotating sleeve 5.

[0058] The limiting protrusion 4 includes a bottom edge and two side edges. The cross-sectional profile formed by the bottom edge and the two side edges is fan-shaped, and the limiting protrusion 4 is evenly distributed in the circumferential direction.

[0059] In this embodiment, there are three limiting protrusions 4. The limiting protrusions 4 include two first limiting protrusions 41 and one second limiting protrusion 42. The first limiting protrusions 41 extend from the seat 3 to the inner end face of the annular peripheral wall 22, and the second limiting protrusion 42 extends from the seat 3 to the second opening 222.

[0060] Furthermore, the two first limiting protrusions 41 are provided with mounting surfaces 411 for fixing the elastic element, and the mounting surfaces 411 include mounting portions that define the elastic element. Specifically, in this embodiment, the mounting portions are flanges 411a provided on both sides of the mounting surface, and the elastic element is a return spring 7. The width of the mounting surface 411 defined between the two flanges 411a corresponds to the diameter of the return spring 7, so as to define the return spring 7.

[0061] Furthermore, the second limiting protrusion 42 forms a clearance step 421 on its outer end face, and the clearance step 421 extends from the second opening 222 toward the seat 3. The shape of the rotating sleeve 5 at the clearance step 421 corresponds to the clearance step 421. This allows the rotating sleeve 5 to form a space for the second branch 62 of the power supply line 6 to be buried at the position corresponding to the clearance step.

[0062] In this embodiment, the rotating protrusion 51 includes a first rotating protrusion 511 and two second rotating protrusions 512. The first rotating protrusion 511 is disposed between the two first limiting protrusions 41, and the second rotating protrusions 512 are disposed between the first limiting protrusions 41 and the second limiting protrusions 42.

[0063] This embodiment provides a protrusion including an annular peripheral wall. The protrusion extends radially from the outer surface of the annular peripheral wall to form multiple limiting protrusions. These limiting protrusions engage with rotating protrusions on the rotating sleeve to limit the rotational stroke of the rotating sleeve. Simultaneously, by providing mounting surfaces for fixing elastic elements on the two first limiting protrusions, each mounting surface including a mounting portion that defines the elastic element, the rotating sleeve can be reset by the action of the elastic element when it rotates relative to the end cap structure. Furthermore, this embodiment simplifies the end cap structure by providing a first opening, a second opening, and a clearance step, and also facilitates the wiring of the first and second branches of the power supply line while controlling the volume of the tubular motor.

[0064] Third embodiment:

[0065] Please refer to Figures 9 to 11 As shown, this embodiment provides an end cap structure for a tubular motor. Unlike the second embodiment described above, each of the first limiting protrusions 41' has symmetrically arranged mounting surfaces on its two sides for fixing an elastic element. These mounting surfaces include mounting portions that define the elastic element. There are two first limiting protrusions 41', and they are symmetrically arranged in the circumferential direction. The annular circumferential wall 22' in this embodiment does not include a second limiting protrusion or a clearance step.

[0066] Correspondingly, the rotating sleeve 5' has two first rotating protrusions 511', which are symmetrically arranged in the circumferential direction. Each first rotating protrusion 511' has a symmetrically arranged mating part for fixing the elastic element. The spring 7' is installed between adjacent and opposite mounting parts and mating parts. The rotating sleeve 5' does not include a second rotating protrusion.

[0067] This embodiment sets two first rotating protrusions, and each of the first limiting protrusions has a mounting surface symmetrically arranged on its two sides for fixing the elastic element. This allows the number of springs to be increased to four when the end cover structure of the tubular motor in this embodiment is engaged with the rotating sleeve, thereby improving the restoring force of the tubular motor when it encounters resistance and rebound, and further effectively improving the sensitivity of the tubular motor when it encounters resistance and rebound.

[0068] Fourth embodiment:

[0069] Please refer to Figures 12 to 14 As shown, this embodiment provides an end cap structure for a tubular motor. Unlike the second embodiment described above, each of the first limiting protrusions 41' has symmetrically arranged mounting surfaces on its two sides for fixing an elastic element. These mounting surfaces include mounting portions that define the elastic element. There are three first limiting protrusions 41', and these three protrusions are evenly spaced in the circumferential direction. The annular circumferential wall 22' in this embodiment does not include second limiting protrusions, but one of the limiting protrusions 41' has a clearance step 411' for the routing of the second branch 62' of the power supply line.

[0070] Correspondingly, the rotating sleeve 5' has three first rotating protrusions 511', which are evenly spaced in the circumferential direction. Each first rotating protrusion 511' has a symmetrically arranged mating part for fixing the elastic element. The spring 7' is installed between adjacent and opposite mounting parts and mating parts.

[0071] This embodiment sets up three first rotating protrusions, and each of the first limiting protrusions has a mounting surface symmetrically arranged on its two sides for fixing the elastic element. This allows the number of springs to be increased to six when the end cover structure of the tubular motor in this embodiment is engaged with the rotating sleeve, thereby improving the restoring force of the tubular motor when it encounters resistance and rebound, and further effectively improving the sensitivity of the tubular motor when it encounters resistance and rebound.

[0072] Fifth embodiment:

[0073] Please refer to Figures 15 to 16As shown, this embodiment provides an end cap structure for a tubular motor. This embodiment has two first limiting protrusions 41', which are arranged adjacent to each other in the circumferential direction. Each first limiting protrusion 41' has a symmetrically arranged mounting portion for fixing an elastic element. The annular circumferential wall of this embodiment includes a second limiting protrusion 42' similar to that in the second embodiment and a clearance step for the routing of a second branch 62' of the power supply line.

[0074] Correspondingly, the rotating sleeve 5' has one first rotating protrusion 511', which is positioned between the mounting portions of the two first limiting protrusions 41'. Symmetrically arranged on the first rotating protrusion 511' are mating portions for fixing the elastic element. There are two second rotating protrusions 512', each located on the opposite side of the first limiting protrusion 41' relative to the first rotating protrusion 511'. Each second rotating protrusion 512' has a mating portion for fixing the elastic element on the side closest to the first limiting protrusion 41'. The spring 7' is installed between adjacent and opposite mounting portions and mating portions.

[0075] This embodiment sets up a first rotating protrusion and two second rotating protrusions. Each of the first limiting protrusions has a mounting surface symmetrically arranged on its two sides for fixing the elastic element. This allows the number of springs to be increased to four when the end cover structure of the tubular motor in this embodiment is engaged with the rotating sleeve. This improves the restoring force of the tubular motor when it encounters resistance and rebounds, and further effectively improves the sensitivity of the tubular motor when it encounters resistance and rebounds.

[0076] Sixth embodiment:

[0077] This utility model provides an electric curtain, including the end cap structure of the tubular motor described in any of the above embodiments.

[0078] This utility model embodiment provides a protrusion extending inward from the end cap body, and forms a cavity in the middle of the protrusion through which the power supply line passes, so that the wire is arranged at the rotation center relative to the tubular motor. When the tubular motor is resisted, the wire in the tubular motor is located at the rotation center, so as to minimize the rotational resistance brought by the wire and effectively improve the sensitivity of the tubular motor to resisting rebound.

[0079] Seventh embodiment:

[0080] Please refer to Figures 1 to 8 As shown, this utility model embodiment provides an electric curtain, including the end cap structure of the tubular motor described in the second embodiment above, and also includes a rotating sleeve 5 disposed around the end cap structure. The rotating sleeve 5 is provided with a rotating protrusion 51 at the corresponding position of the limiting protrusion 4. When the end cap structure is disposed inside the rotating sleeve 5, the rotating protrusion 51 and the limiting protrusion 4 are arranged at intervals in the circumferential direction.

[0081] The rotating protrusion 51 includes a first rotating protrusion 511 and two second rotating protrusions 512. The first rotating protrusion 511 is disposed between the two first limiting protrusions 41. The electric curtain also includes an elastic element disposed between the first rotating protrusion 511 and the second limiting protrusions 42. In this embodiment, the first rotating protrusion is also provided with limiting structures that restrict the elastic element on both sides. In this embodiment, the elastic element can be a return spring 7.

[0082] In this embodiment, the second rotating protrusion 512 is disposed between the first limiting protrusion 41 and the second limiting protrusion 42.

[0083] In this embodiment, the shape of the rotating sleeve 5 at the avoidance step 421 corresponds to the avoidance step 421. This creates a space for the second branch 62 of the power supply line 6 to be buried at the position of the rotating sleeve 5 corresponding to the avoidance step. At the same time, the rotating sleeve 5 is also provided with an outlet 52 for the second branch 62 to extend out.

[0084] This embodiment provides a protrusion including an annular peripheral wall. The protrusion extends radially from the outer surface of the annular peripheral wall to form multiple limiting protrusions. These limiting protrusions engage with rotating protrusions on the rotating sleeve to limit the rotational stroke of the rotating sleeve. Simultaneously, by providing mounting surfaces for fixing elastic elements on the two first limiting protrusions, each mounting surface including a mounting portion that defines the elastic element, the rotating sleeve can be reset by the action of the elastic element when it rotates relative to the end cap structure. Furthermore, this embodiment simplifies the end cap structure by providing a first opening, a second opening, and a clearance step, and also facilitates the wiring of the first and second branches of the power supply line while controlling the volume of the tubular motor.

[0085] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An end cover structure of a tubular motor comprising an end cover body, characterized by, The protrusion further comprises a cavity formed in the middle of the protrusion for the power cord to pass through; the protrusion comprises an annular peripheral wall, and the annular peripheral wall forms the cavity in the middle; the protrusion forms a first opening on the inner end surface of the annular peripheral wall for the first branch of the power cord to extend out; the protrusion forms a second opening on the side wall surface of the annular peripheral wall for the second branch of the power cord to extend out.

2. The end cover structure of a tubular motor according to claim 1, wherein The second opening is located at the inner end surface of the annular peripheral wall, so that the first opening and the second opening are in communication.

3. The end cap structure of a tubular motor according to claim 1 or 2, wherein The end cover body comprises an outer wall surface, and the outer wall surface is provided with a wire inlet opening for the power cord to enter.

4. The end cap structure of a tubular motor according to claim 3, wherein The end cover body and the protrusion are further provided with a seat body, the protrusion extends inward from the seat body, and the seat body is formed with an avoidance cavity, and the avoidance cavity is in communication with the wire inlet opening and the cavity.

5. The end bell construction of a tubular motor as recited in claim 1, wherein, The end cover structure further comprises a limiting protrusion formed by extending radially from the annular peripheral wall, and the limiting protrusion is used for cooperating with a rotating protrusion on a rotating sleeve to limit the rotating stroke of the rotating sleeve.

6. The end cap structure of a tubular motor according to claim 5, wherein The limiting protrusion comprises a bottom edge and two side edges, and the cross-sectional profile enclosed by the bottom edge and the two side edges is a sector shape.

7. The end cap structure of a tubular motor according to claim 6, wherein The two side edges of each limiting protrusion are symmetrically provided with a mounting surface for fixing the elastic member, and the mounting surface comprises a mounting portion for limiting the elastic member.

8. The end cap structure of a tubular motor according to claim 7, wherein The number of limiting protrusions is two or three, and the limiting protrusions are uniformly distributed in the circumferential direction.

9. The end cover structure of a tubular motor according to claim 1 or 2, wherein The end cover structure further comprises a limiting protrusion formed by extending radially from the annular peripheral wall, and the limiting protrusion is used for cooperating with a rotating protrusion on a rotating sleeve to limit the rotating stroke of the rotating sleeve, the limiting protrusion comprises two first limiting protrusions and one second limiting protrusion, the first limiting protrusion extends to the inner end surface of the annular peripheral wall, and the second limiting protrusion extends to the second opening.

10. The end bell construction of a tubular motor as recited in claim 9, wherein, The two first limiting protrusions are oppositely provided with a mounting surface for fixing the elastic member, and the mounting surface comprises a mounting portion for limiting the elastic member.

11. The end cap structure of a tubular motor according to claim 10, wherein Each of the first limiting protrusions is symmetrically provided with a mounting surface for fixing the elastic member, and the mounting surface comprises a mounting portion for limiting the elastic member.

12. The end bell construction of a tubular motor as recited in claim 10, wherein, The second limiting protrusion forms an avoidance step on the outer end surface, and the avoidance step extends from the second opening to the seat body.

13. An electrically operated shade characterized by, The end cover structure of the tubular motor comprises the end cover structure of any one of claims 1 to 12.

14. An electrically operated shade characterized by, The end cover structure of the tubular motor comprises the end cover structure of any one of claims 5 to 10, and further comprises a rotating sleeve arranged at the periphery of the end cover structure, the rotating sleeve is provided with a rotating protrusion at the corresponding position of the limiting protrusion, and the rotating protrusion and the limiting protrusion are arranged at intervals in the circumferential direction.

15. An electrically operated shade characterized by, The end cover structure of the tubular motor comprises the end cover structure of any one of claims 9 or 10, and further comprises a rotating sleeve arranged at the periphery of the end cover structure, the rotating sleeve is provided with a rotating protrusion at the corresponding position of the limiting protrusion, and the rotating protrusion and the limiting protrusion are arranged at intervals in the circumferential direction. The rotating protrusion comprises a first rotating protrusion and two second rotating protrusions, the first rotating protrusion is arranged between the two first limiting protrusions, and the electric curtain further comprises an elastic member arranged between the first rotating protrusion and the second limiting protrusion. The second rotating protrusion is provided between the first limiting protrusion and the second limiting protrusion.

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