End cover inner end structure of tubular motor and electric curtain

Abstract

The utility model discloses an end cover inner end structure of a tubular motor and an electric curtain, which comprise a protruding part formed by extending inwards from an end cover body, the inner end structure further comprises limiting bulges formed by extending radially from the protruding part, the limiting bulges at least comprise a first limiting bulge, a second limiting bulge and a third limiting bulge, and a mounting surface for fixing the elastic piece is arranged on the first limiting bulge. According to the utility model, the overall structure of the device rebounding when encountering resistance is relatively simple, the assembly difficulty is reduced, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tubular motor technical field especially relates to a tubular motor's end cover inner end structure and electric curtain. BACKGROUND

[0002] Current electric curtain, such as roll-up door curtain, electric curtain etc. can all adopt tubular motor as its power output mechanism. And the existing tubular motor's resistance to bounce structure is provided with swing lever body and elastic member located at both sides of swing lever body, the structure is relatively complex, at the same time, swing lever body as an independent part has certain assembly difficulty in the production process, which affects the production efficiency. SUMMARY

[0003] The utility model provides a tubular motor's end cover inner end structure and electric curtain to solve the existing tubular motor's resistance to bounce structure complex, assembly difficulty, the problem of low production efficiency.

[0004] The utility model discloses a tubular motor's end cover inner end structure, including the protruding part that forms from the end cover body and extends inwards, the inner end structure still includes the limiting protruding that forms from the protruding part and extends radially, the limiting protruding at least includes first limiting protruding, be equipped with the mounting surface for the fixed elastic member on first limiting protruding.

[0005] Further, the number of the first limiting protruding is two, two first limiting protruding are symmetrically arranged in the circumferential direction, and the mounting surface for the fixed elastic member is symmetrically arranged on each first limiting protruding.

[0006] Further, the number of the first limiting protruding is three, three first limiting protruding are evenly spaced in the circumferential direction, and the mounting surface for the fixed elastic member is symmetrically arranged on each first limiting protruding.

[0007] Further, the number of the first limiting protruding is two, two first limiting protruding are symmetrically arranged in the circumferential direction, and the mounting surface for the fixed elastic member is symmetrically arranged on each first limiting protruding.

[0008] Further, the number of the first limiting protruding is two, two first limiting protruding are symmetrically arranged in the circumferential direction, and the mounting surface for the fixed elastic member is symmetrically arranged on each first limiting protruding.

[0009] Further, the mounting surface includes the mounting portion of the elastic member, and the mounting portion includes the blocking edge arranged at both sides of the mounting surface, the elastic member is a return spring, and the width of the mounting surface defined between the two blocking edges corresponds to the diameter of the return spring.

[0010] Further, the protruding part forms a cavity for the power line to pass through in the middle.

[0011] Further, the protruding portion comprises a ring-shaped peripheral wall, the ring-shaped peripheral wall forms the cavity at the middle portion, the first limiting protrusion is formed by extending radially from the ring-shaped peripheral wall.

[0012] Further, the protruding portion forms a first opening at the inner end surface of the ring-shaped peripheral wall for the first branch of the power line to extend out.

[0013] Further, the protruding portion forms a cavity at the middle portion for the power line to pass through, the protruding portion comprises a ring-shaped peripheral wall, the ring-shaped peripheral wall forms the cavity at the middle portion, the first limiting protrusion is formed by extending radially from the ring-shaped peripheral wall, the protruding portion forms a first opening at the inner end surface of the ring-shaped peripheral wall for the first branch of the power line to extend out, the protruding portion forms a second opening at the side wall surface of the ring-shaped peripheral wall for the second branch of the power line to extend out.

[0014] Further, the second opening is located at the inner end surface of the ring-shaped peripheral wall, so that the first opening and the second opening are communicated.

[0015] Further, the inner end structure comprises an end cap body, the end cap body comprises an outer wall surface, the outer wall surface is provided with a wire inlet opening for the power line to enter, the inner end structure further comprises a second limiting protrusion formed by extending radially from the protruding portion, the second limiting protrusion extends to the second opening.

[0016] Further, a seat body is further arranged between the end cap body and the protruding portion, the protruding portion extends inwardly from the seat body, the seat body is formed with an avoiding cavity, the avoiding cavity is communicated with the wire inlet opening and the cavity.

[0017] Further, the second limiting protrusion forms an avoiding step at the outer end surface, the avoiding step extends from the second opening to the seat body.

[0018] Further, the cross-sectional shape of the limiting protrusion is a sector shape, the width of the sector shape gradually increases in the direction radially outward from the ring-shaped peripheral wall.

[0019] The utility model embodiment still provides a kind of electric curtain, including the end cap inner end structure of tubular motor of any one described above.

[0020] Further, the electric curtain further comprises a rotating sleeve arranged around the end cap inner end structure, the rotating sleeve is provided with a rotating protrusion at least at the corresponding position of the first limiting protrusion, and the rotating protrusion and the limiting protrusion are arranged in a circumferential direction.

[0021] The utility model discloses an electric curtain, the end cover inner end structure of tubular motor still provides a rotating sleeve that is arranged on the periphery of the end cover inner end structure on one side, the rotating sleeve is provided with rotating protrusion in the corresponding position of the limiting protrusion, and the rotating protrusion and the limiting protrusion are arranged at intervals in the circumferential direction.

[0022] The rotating protrusion includes 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 includes an elastic member arranged between the first rotating protrusion and the second limiting protrusion.

[0023] The second rotating protrusion is arranged between the first limiting protrusion and the second limiting protrusion.

[0024] The utility model discloses an electric curtain, the end cover inner end structure of tubular motor still provides a rotating sleeve that is arranged on the periphery of the end cover inner end structure on one side, the rotating sleeve is provided with rotating protrusion in the corresponding position of the limiting protrusion, and the rotating protrusion and the limiting protrusion are arranged at intervals in the circumferential direction. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiment description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0026] Figure 1 It is the perspective view of the end cover inner end structure of tubular motor in the second and fourth embodiments of the utility model;

[0027] Figure 2 It is Figure 1 the perspective view of another view of the end cover inner end structure;

[0028] Figure 3 It is Figure 1 the sectional view of another view of the end cover inner end structure, and the section in the drawing is located in the vertical plane and passes through the central axis;

[0029] Figure 4 It is the explosion view of the end cover inner end structure and rotating sleeve of tubular motor in the second and seventh embodiments of the utility model;

[0030] Figure 5It is the cross-sectional view of the end cover inner end structure and rotating sleeve of the tubular motor in the second and seventh embodiments of the utility model after assembly, the cross section in the drawing is located in the vertical plane and is close to the first opening;

[0031] Figure 6 It is the front view perspective cross-sectional view of the rotating sleeve in the second and seventh embodiments of the utility model, the cross section in the drawing is located in the vertical plane and is located in the middle of the first rotating protrusion;

[0032] Figure 7 It is the cross-sectional view of the end cover inner end structure and rotating sleeve of the tubular motor in the second and seventh embodiments of the utility model after installation, the cross section in the drawing is located in the vertical plane and is close to the first opening;

[0033] Figure 8 It is the cross-sectional view of the end cover inner end structure and rotating sleeve of the tubular motor in the second and seventh embodiments of the utility model after installation, the cross section in the drawing is located in the vertical plane and passes through the central axis, and the local enlarged view of the vicinity of the end cover inner end structure is also shown in the drawing;

[0034] Figure 9 It is the explosion view of the end cover inner end structure and rotating sleeve of the tubular motor in the third embodiment of the utility model;

[0035] Figure 10 It is the cross-sectional view of the end cover inner end structure and rotating sleeve of the tubular motor in the third embodiment of the utility model after installation, the cross section in the drawing is located in the vertical plane and is close to the first opening;

[0036] Figure 11 It is the cross-sectional view of the end cover inner end structure and rotating sleeve of the tubular motor in the third embodiment of the utility model after installation, the cross section in the drawing is located in the vertical plane and passes through the central axis;

[0037] Figure 12 It is the explosion view of the end cover inner end structure and rotating sleeve of the tubular motor in the fourth embodiment of the utility model;

[0038] Figure 13 It is the cross-sectional view of the end cover inner end structure and rotating sleeve of the tubular motor in the fourth embodiment of the utility model after installation, the cross section in the drawing is located in the vertical plane and is close to the first opening;

[0039] Figure 14 It is the cross-sectional view of the end cover inner end structure and rotating sleeve of the tubular motor in the fourth embodiment of the utility model after installation, the cross section in the drawing is located in the vertical plane and passes through the central axis;

[0040] Figure 15is the cross-sectional view of the end cover inner end structure of the tubular motor and the rotating sleeve installed behind the tubular motor in the fifth embodiment of the utility model, the cross section in the drawing is located in the vertical plane, and is close to the first opening;

[0041] Figure 16 is the cross-sectional view of the end cover inner end structure of the tubular motor and the rotating sleeve installed behind the tubular motor in the fifth embodiment of the utility model, the cross section in the drawing is located in the vertical plane, and is close to the first opening; DETAILED DESCRIPTION

[0042] In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clearly understood, the utility model will be further described in detail below in combination with the drawings and embodiments.It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0043] When the utility model embodiments refer to "first", "second" and the like ordinal numbers, unless according to the context, it expresses the order of meaning, should be understood as merely for distinguishing.

[0044] In the description of the utility model, it should be explained that, unless another explicit provision and limitation, the terms "installation", "connection", "connection" should be broad-sense understanding, for example, can be fixed connection, can also be detachable connection, or integrally connected;Can be mechanical connection, can also be electrical connection;It can be directly connected, or indirectly connected through intermediate medium, it can be the intercommunication of two elements inside.For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0045] First embodiment:

[0046] The embodiment provides an end cover inner end structure of a tubular motor, which is independent of an end cover body and is arranged on the end cover body through buckling, comprising a protruding part formed by extending inward from the end cover body, the inner end structure further comprises a limiting protrusion formed by extending radially from the protruding part, the limiting protrusion comprises at least a first limiting protrusion, and a mounting surface for fixing an elastic element is arranged on the first limiting protrusion.

[0047] In the embodiment, the protruding part is connected with the end cover body, and the number of the first limiting protrusion is one or two.The cross-sectional shape of the first limiting protrusion includes but is not limited to a circular shape, an elliptical shape, a rectangular shape or a semicircular shape and a semi-elliptical shape.

[0048] The utility model discloses an embodiment forms the protruding portion that extends inwards on the end cover body, and forms the limiting protruding from the protruding portion radially, the limiting protruding includes at least first limiting protruding, be equipped with the mounting surface for the elastic piece fixed on the first limiting protruding, cancel the setting of swing lever body through the first limiting protruding, reduced the assembly difficulty of the structure of meeting resistance and rebounding, and the elastic piece can cooperate rotating sleeve and play the function of meeting resistance and stopping normal and reverse rotation reset on the first limiting protruding, and the installation of rotating sleeve is also more convenient, make the whole structure is relatively simple, further reduce the assembly difficulty, improve production efficiency.

[0049] Second embodiment:

[0050] Please refer to Figures 1 to 8 The utility model discloses an embodiment provides a kind of end cover inner end structure of tubular motor, including end cover body 1 and with end cover body 1 integrally formed, still including the protruding portion 2 formed from end cover body 1 and extends inwards, the cavity 21 for power line 6 to pass through is formed in the middle of the protruding portion 2.

[0051] As a preferred scheme but not limit, the protruding portion 2 includes middle axis L and annular peripheral wall 22 along middle axis L is arranged, and the annular peripheral wall 22 forms the cavity 21 in middle part. Exemplarily, the cross-sectional shape of annular peripheral wall 22 is circular ring, and the shape of the cavity 21 is cylinder. The cavity 21 of cylinder is centered with middle axis L, so that wire 6 line is located at the center of rotation, to minimize the rotation resistance brought by wire.

[0052] As a preferred scheme but not limit, the protruding portion 2 forms the first opening 221 for the first branch 61 of power line 6 to extend out on the inner end surface of the annular peripheral wall 22. The protruding portion 2 forms the second opening 222 for the second branch 62 of power line 6 to extend out on the side wall surface of the annular peripheral wall 22. Specifically, the second opening 221 is located at the inner end surface of the annular peripheral wall 22, so that the first opening 221 and the second opening 222 are communicated.

[0053] In the embodiment, the first branch 61 of wire 6 is used to connect with internal circuit element of tubular motor, exemplarily, internal circuit element includes but is not limited to circuit board 8 and related element, and the second branch 62 of wire 6 is used to extend to the outside of rotating sleeve 5 and is fixed. The embodiment is communicated by the first opening 221 and the second opening 222, on the one hand, it is favorable to simplify end cover inner end structure, on the other hand, it is also convenient for the wiring operation of the first branch 61 and the second branch 62 of power line 6.

[0054] As a specific solution but not as a limitation, the end cover body 1 comprises an outer wall surface 11, and an entering wire port 12 is formed on the outer wall surface 11 for the power line to enter. The end cover body 1 and the protruding part 2 are further provided with a seat body 3, the protruding part 2 extends inward from the seat body 3, and an avoiding cavity 31 is formed in the seat body 3, the avoiding cavity 31 is communicated with the entering wire port 12 and the cavity 21. The seat body 3 of the embodiment is arranged on the inner end surface of the end cover body 1, and the inner end surface of the end cover body 1 is further used for assembling and aligning with the rotating sleeve 5.

[0055] As a preferred solution but not as a limitation, the end cover inner end structure further comprises a limiting protrusion 4 formed by extending radially from the annular peripheral wall 22, and the limiting protrusion 4 is used for cooperating with the rotating protrusion 51 on the rotating sleeve 5 to limit the rotating stroke of the rotating sleeve 5.

[0056] Specifically, the limiting protrusion 4 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, and the limiting protrusions 4 are uniformly distributed in the circumferential direction.

[0057] And the limiting protrusions 4 are uniformly distributed in the circumferential direction, further, the cross-sectional shape of the limiting protrusion 4 is a sector, and the width of the sector gradually increases in the direction radially outward from the annular peripheral wall 22.

[0058] In the embodiment, the number of limiting protrusions 4 is three, the limiting protrusions 4 comprise two first limiting protrusions 41 and one second limiting protrusion 42, the first limiting protrusions 41 extend from the seat body 3 to the inner end surface of the annular peripheral wall 22, and the second limiting protrusion 42 extends from the seat body 3 to the second opening 222.

[0059] Further, the two first limiting protrusions 41 are oppositely provided with mounting surfaces 411 for fixing the elastic members, and the mounting surfaces 411 comprise mounting portions for limiting the elastic members. The mounting portion can be a counterbore corresponding to the shape of the end portion of the elastic member. Specifically, in the embodiment, the mounting portion is a stop edge 411a arranged on both sides of the mounting surface, the elastic member is a return spring 7, and the width of the mounting surface 411 defined between the two stop edges 411a corresponds to the diameter of the return spring 7, so as to limit the return spring 7.

[0060] Further, the second limiting protrusion 42 forms an avoiding step 421 on the outer end surface, and the avoiding step 421 extends from the second opening 222 to the seat body 3. The shape of the rotating sleeve 5 at the avoiding step 421 corresponds to the avoiding step 421. The rotating sleeve 5 forms a space for burying the second branch 62 of the power line 6 at the corresponding position of the avoiding step.

[0061] The protrusion includes a ring-shaped peripheral wall, and a plurality of limiting protrusions are formed on the outer wall surface of the ring-shaped peripheral wall and extend radially. The limiting protrusions are used to cooperate with rotating protrusions on the rotating sleeve to limit the rotating stroke of the rotating sleeve. Meanwhile, by oppositely arranging mounting surfaces for fixing the elastic member on the two first limiting protrusions, the mounting surfaces include mounting portions for limiting the elastic member, so that when the rotating sleeve and the inner end structure of the end cover rotate relative to each other, the elastic member can be reset by the action of the elastic member. In addition, by providing the first opening, the second opening and the avoiding step, the inner end structure of the end cover is simplified, and wiring operations on the first branch and the second branch of the power supply line can be completed under the premise of controlling the size of the tubular motor.

[0062] Third embodiment:

[0063] Please refer to Figures 9 to 11 The inner end structure of the end cover of the tubular motor is provided, and the difference from the second embodiment is that the two side edges of each first limiting protrusion 41' are symmetrically provided with a mounting surface for fixing the elastic member, and the mounting surface includes a mounting portion for limiting the elastic member. The number of the first limiting protrusions 41' is two, and the first limiting protrusions 41' are symmetrically arranged in the circumferential direction. The ring-shaped peripheral wall 22' of the present embodiment does not include a second limiting protrusion and an avoiding step.

[0064] Correspondingly, the number of the first rotating protrusions 511' of the rotating sleeve 5' is two, the first rotating protrusions 511' are symmetrically arranged in the circumferential direction, and each first rotating protrusion 511' is symmetrically provided with a cooperating portion for fixing the elastic member. The spring 7' is installed between the adjacent and opposite mounting portions and cooperating portions. The rotating sleeve 5' does not include a second rotating protrusion.

[0065] By arranging two first rotating protrusions, the two side edges of each first limiting protrusion are symmetrically provided with a mounting surface for fixing the elastic member, so that when the inner end structure of the end cover of the tubular motor of the present embodiment cooperates with the rotating sleeve, the number of springs can be increased to four, the reset force of the tubular motor when encountering resistance is improved, and the sensitivity of the tubular motor when encountering resistance is further improved.

[0066] Fourth embodiment:

[0067] Please refer to Figures 12 to 14As shown, the end structure of the end cover of the tubular motor of the embodiment provides that the two side edges of each first limiting protrusion 41' 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. The number of the first limiting protrusions 41' is three, and the three first limiting protrusions are uniformly and spaced apart in the circumferential direction. The annular peripheral wall 22' of the embodiment does not comprise a second limiting protrusion, but one of the limiting protrusions 41' is provided with an avoidance step 411' for routing the second branch 62' of the power line.

[0068] Correspondingly, the number of the first rotating protrusions 511' of the rotating sleeve 5' is three, and the three first rotating protrusions 511' are uniformly and spaced apart in the circumferential direction, and each first rotating protrusion 511' is symmetrically provided with a matching portion for fixing the elastic member. The spring 7' is installed between the adjacent and opposite mounting portions and matching portions.

[0069] The embodiment provides three first rotating protrusions, and the two side edges of each first limiting protrusion are symmetrically provided with a mounting surface for fixing the elastic member, so that when the end structure of the end cover of the tubular motor of the embodiment cooperates with the rotating sleeve, the number of the springs can be increased to six, the resetting force of the tubular motor when encountering resistance and rebounding is improved, and the sensitivity of the tubular motor when encountering resistance and rebounding is further effectively improved.

[0070] Fifth embodiment:

[0071] Please refer to Figures 15 to 16 The end structure of the end cover of the tubular motor of the embodiment provides that the number of the first limiting protrusions 41' of the embodiment is two, the two first limiting protrusions 41' are adjacently arranged in the circumferential direction, and each first limiting protrusion 41' is symmetrically provided with a mounting portion for fixing the elastic member. The annular peripheral wall of the embodiment comprises a second limiting protrusion 42' similar to the second embodiment and an avoidance step for routing the second branch 62' of the power line.

[0072] Correspondingly, the number of the first rotating protrusions 511' of the rotating sleeve 5' is one, and the first rotating protrusion 511' is arranged between the mounting portions of the two first limiting protrusions 41', and the first rotating protrusion 511' is symmetrically provided with a matching portion for fixing the elastic member. The number of the second rotating protrusions 512' is two, and each second rotating protrusion 512' is located on the other side of the first limiting protrusion 41' relative to the first rotating protrusion 511', and the second rotating protrusion 512' is provided with a matching portion for fixing the elastic member on the side close to the first limiting protrusion 41'. The spring 7' is installed between the adjacent and opposite mounting portions and matching portions.

[0073] The embodiment is provided with a first rotating protrusion and two second rotating protrusions, two sides of each first limiting protrusion are symmetrically provided with mounting surfaces for fixing elastic members, so that when the end cover structure of the tubular motor is matched with the rotating sleeve, the number of springs can be increased to four, the reset force of the tubular motor when meeting resistance and rebounding is improved, and the sensitivity of the tubular motor when meeting resistance and rebounding is further improved.

[0074] The sixth embodiment is provided with an end cover inner end structure of a tubular motor.

[0075] The utility model embodiment provides a kind of electric curtain, including the end cover inner end structure of tubular motor described in any of the above embodiments.

[0076] The rotating sleeve is at least provided with rotating protrusions at the corresponding positions of the first limiting protrusions, and the rotating protrusions and the limiting protrusions are arranged at intervals in the circumferential direction.

[0077] The utility model embodiment is provided with a protruding portion extending inward on the end cover body, and a limiting protrusion is formed by extending radially from the protruding portion, the limiting protrusion includes at least a first limiting protrusion, and the first limiting protrusion is provided with a mounting surface for fixing elastic members.

[0078] The seventh embodiment is provided with an end cover inner end structure of a tubular motor.

[0079] Please refer to Figures 1 to 8 The utility model embodiment provides a kind of electric curtain, including the end cover inner end structure of tubular motor described in the above second embodiment, further include rotating sleeve 5 being arranged in the periphery of the end cover inner end structure, rotating sleeve 5 is provided with rotating protrusion 51 in the corresponding position of limiting protrusion 4, when end cover inner end structure is arranged in rotating sleeve 5, rotating protrusion 51 and limiting protrusion 4 are arranged at intervals in the circumferential direction.

[0080] The rotating protrusion 51 includes a first rotating protrusion 511 and two second rotating protrusions 512, the first rotating protrusion 511 is arranged between the two first limiting protrusions 41, and the electric curtain further includes an elastic member arranged between the first rotating protrusion 511 and the second limiting protrusion 42.

[0081] In the embodiment, the second rotating protrusion 512 is arranged between the first limiting protrusion 41 and the second limiting protrusion 42.

[0082] In the embodiment, the rotating sleeve 5 is shaped at the avoiding step 421 corresponding to the avoiding step 421, so that the rotating sleeve 5 forms a space for the second branch 62 of the power line 6 to be buried at the position corresponding to the avoiding step. Meanwhile, the rotating sleeve 5 is also provided with a wire outlet 52 for the second branch 62 to extend out.

[0083] The embodiment provides a protrusion comprising an annular peripheral wall, and a plurality of limiting protrusions are radially extended from the outer wall surface of the annular peripheral wall, and the limiting protrusions are used for cooperating with rotating protrusions on the rotating sleeve to limit the rotating stroke of the rotating sleeve. Meanwhile, the mounting surfaces for fixing the elastic members are oppositely arranged on the two first limiting protrusions, the mounting surfaces comprise mounting portions for limiting the elastic members, so that the rotating sleeve can be reset by the elastic members when the rotating sleeve and the inner end structure of the end cover relatively rotate. In addition, the first opening, the second opening and the avoiding step simplify the inner end structure of the end cover, and facilitate the wiring operation of the first branch and the second branch of the power line under the premise of controlling the volume of the tubular motor.

[0084] The above merely describes the preferred embodiments of the utility model and is not intended to limit the utility model. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An end structure in an end cover of a tubular motor, characterized by The inner end structure comprises a protrusion formed by extending inward from the end cover body, and further comprises a limiting protrusion formed by extending radially from the protrusion, and the limiting protrusion comprises at least a first limiting protrusion, and the first limiting protrusion is provided with a mounting surface for fixing an elastic member.

2. The end structure in the end cover of a tubular motor according to claim 1, wherein The number of the first limiting protrusions is two, and the two first limiting protrusions are symmetrically arranged in the circumferential direction, and each of the first limiting protrusions is symmetrically provided with a mounting surface for fixing an elastic member.

3. The end structure in the end cover of a tubular motor according to claim 1, wherein The number of the first limiting protrusions is three, and the three first limiting protrusions are uniformly spaced in the circumferential direction, and each of the first limiting protrusions is symmetrically provided with a mounting surface for fixing an elastic member.

4. The end structure in the end cover of a tubular motor according to claim 1, wherein The number of the first limiting protrusions is two, and the two first limiting protrusions are symmetrically arranged in the circumferential direction, and each of the first limiting protrusions is symmetrically provided with a mounting surface for fixing an elastic member.

5. The end structure in the end cover of a tubular motor according to claim 1, wherein The number of the first limiting protrusions is two, and the two first limiting protrusions are symmetrically arranged in the circumferential direction, and each of the first limiting protrusions is symmetrically provided with a mounting surface for fixing an elastic member.

6. An end structure in an end cover of a tubular motor according to any one of claims 2 to 5, characterized in that The mounting surface comprises a mounting portion for limiting the elastic member, and the mounting portion comprises a blocking edge arranged on both sides of the mounting surface, the elastic member is a return spring, and the width of the mounting surface defined between the two blocking edges corresponds to the diameter of the return spring.

7. An end structure in an end cover of a tubular motor according to claim 6, wherein The protrusion comprises a cavity for passing the power line.

8. An end structure in an end cover of a tubular motor according to claim 7, wherein The protrusion comprises an annular peripheral wall, the annular peripheral wall forms the cavity in the middle, and the first limiting protrusion is formed by extending radially from the annular peripheral wall.

9. An end structure in an end cover of a tubular motor according to claim 8, wherein The protrusion comprises an annular peripheral wall, the annular peripheral wall forms the cavity in the middle, and the first limiting protrusion is formed by extending radially from the annular peripheral wall.

10. An end structure in an end cover of a tubular motor according to claim 4 or 5, characterized in that The protrusion comprises an annular peripheral wall, the annular peripheral wall forms the cavity in the middle, and the first limiting protrusion is formed by extending radially from the annular peripheral wall.

11. An end structure in an end cover of a tubular motor according to claim 10, wherein The protrusion comprises an annular peripheral wall, the annular peripheral wall forms the cavity in the middle, and the first limiting protrusion is formed by extending radially from the annular peripheral wall.

12. An end structure in an end cover of a tubular motor according to claim 11, 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 communicated.

13. An end structure in an end cover of a tubular motor according to claim 12, wherein The inner end structure comprises an end cover body, the end cover body comprises an outer wall surface, the outer wall surface is provided with a wire inlet opening for the power line to enter, and the inner end structure further comprises a second limiting protrusion formed by extending radially from the protrusion, and the second limiting protrusion extends to the second opening.

14. An end structure in an end cover of a tubular motor according to claim 13, wherein The end cover body and the protrusion are further provided with a seat body, the protrusion extends inward from the seat body, the seat body is formed with an avoiding cavity, and the avoiding cavity is communicated with the wire inlet opening and the cavity.

15. An end structure in an end cover of a tubular motor according to claim 14, wherein The second limiting protrusion is formed with an avoiding step on the outer end surface, and the avoiding step extends from the second opening to the seat body.

16. An electrically operated shade characterized by, The cross-sectional shape of the limiting protrusion is a sector, and the width of the sector gradually increases in the direction radially outward from the annular peripheral wall.

17. The motorized shade of claim 16, wherein, The inner end structure of the end cover of the tubular motor comprises any one of claims 1 to 15. Further comprising a rotating sleeve arranged on the periphery of the inner end structure of the end cover, and the rotating sleeve is provided with a rotating protrusion at least at the corresponding position of the first limiting protrusion, and the rotating protrusion and the limiting protrusion are arranged in the circumferential direction.

18. An electrically operated shade characterized by, The end cover inner end structure of the tubular motor according to any one of claims 12-15, further comprising a rotating sleeve arranged at the periphery of the end cover inner end structure, wherein the rotating sleeve is provided with rotating protrusions at positions corresponding to the limiting protrusions, and the rotating protrusions and the limiting protrusions are arranged at intervals in the circumferential direction. The rotating protrusions comprise 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 arranged between the first limiting protrusion and the second limiting protrusion.

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