Backstop, motor device, curtain control device and electric curtain

Abstract

The embodiment of the present invention discloses a check valve, a motor device, a curtain control device and an electric curtain. The check valve comprises: a driving force receiving part; a control part, which is arranged on one side of the driving force receiving part; a fixed sleeve, which is sleeved on the outer side of the control part and is provided with a first check surface on the side away from the driving force receiving part; a driving force output part, which is arranged in cooperation with the control part on the side away from the driving force receiving part and is provided with an elastically controlled second check surface; wherein, the second check surface is in an elastically stretched state, and the first check surface and the second check surface are in check cooperation; when the driving force receiving part obtains torque, it drives the control part to cooperate with the driving force output part, so that the second check surface is in an elastically compressed state, the second check surface and the first check surface are separated, and the driving force output part can rotate. The embodiment of the present invention effectively solves the problem that the existing check valve has a complex structure and poor durability.

Description

Technical Field

[0001] The present invention relates to the technical field of curtain control, and in particular to a backstop, a motor device, a curtain control device and an electric curtain. Background Art

[0002] As a basic component in mechatronic mechanical transmission, the backstop is usually implemented by using a plurality of roller needles and a plurality of elastic parts in a one-to-one matching arrangement. Existing electric curtains include opening and closing curtains and rolling curtains. The rolling curtains require a backstop to stop due to the gravity of the rolling curtains to prevent the rolling curtains from sliding down automatically.

[0003] However, the check valve that uses a plurality of roller needles and a plurality of elastic members to achieve the check function in a one-to-one manner has a complex structure, is prone to failure, and has poor durability. Summary of the invention

[0004] Therefore, the embodiments of the present invention provide a backstop, a motor device, a curtain control device and an electric curtain, which effectively solve the problems of the existing backstop having a complex structure and poor durability.

[0005] On the one hand, an embodiment of the present invention provides a check valve, including a driving force receiving part; a control part, which is arranged on one side of the driving force receiving part; a fixed sleeve, which is sleeved on the outer side of the control part and is provided with a first check surface on the side away from the driving force receiving part; a driving force output part, which is arranged in cooperation with the control part on the side away from the driving force receiving part and is provided with a second check surface which is elastically controlled; wherein, the second check surface is in an elastically stretched state, and the first check surface and the second check surface are in check cooperation; when the driving force receiving part obtains torque, it drives the control part to cooperate with the driving force output part, so that the second check surface is in an elastically compressed state, the second check surface and the first check surface are separated, and the driving force output part is rotatable.

[0006] In one embodiment of the present invention, the driving force output portion comprises: a check member provided with the second check surface; and an elastic member provided on a side of the check member away from the driving force receiving portion.

[0007] In one embodiment of the present invention, the control part includes: a control member, connected to the driving force receiving part, and having a first direction driving position and a first direction disengagement position connected to the first direction driving position on a side away from the driving force receiving part; a needle roller, when the second check surface is in an elastic compression state, the needle roller is located at the first direction driving position; or, when the second check surface is in an elastic extension state, the needle roller is located at the first direction disengagement position; a control sleeve, sleeved on the outside of the control member and the needle roller.

[0008] In one embodiment of the present invention, the control member is further provided with a second direction driving position corresponding to the first direction driving position and a second direction disengaging position connected to the second direction driving position on a side away from the driving force receiving portion.

[0009] In one embodiment of the present invention, the driving force output portion is also provided with a driving conduction surface, the driving force conduction surface and the second check surface are in the same plane, and the second check surface surrounds the driving force conduction surface; wherein, when the second check surface is in an elastic compression state, the needle roller clamp is arranged between the driving force conduction surface and the first direction driving position.

[0010] In one embodiment of the present invention, the driving force transmission surface is provided with a groove corresponding to the first direction driving position, and a first matching position is provided at a position of the driving force transmission surface corresponding to the first direction driving position; when the roller needle cooperates with the driving force transmission member, the roller needle is clamped between the first direction driving position and the first matching position.

[0011] In one embodiment of the present invention, a guide position is provided on the inner side surface of the control sleeve close to the control member; wherein the first direction driving position cooperates with the first direction disengagement position to form a transfer channel, and the needle roller is clamped between the guide position and the transfer channel; the control sleeve is clamped between the fixed sleeve and the control member, and the control sleeve rotates relative to the fixed sleeve.

[0012] In one embodiment of the present invention, a plurality of first direction driving positions, a plurality of second direction driving positions and a corresponding plurality of first direction disengagement positions are provided on a side of the control member away from the driving force receiving portion.

[0013] In one embodiment of the present invention, the backstop further comprises a fixed shell, which is sleeved on the outside of the driving force receiving portion, and a plurality of fixing grooves are provided on a side of the fixed shell close to the fixed sleeve.

[0014] In one embodiment of the present invention, the backstop further comprises: a plurality of fixing buckles are provided on the outer side of the fixing sleeve away from the control part; wherein each fixing buckle is provided corresponding to each fixing groove.

[0015] In one embodiment of the present invention, the first non-return surface and the second non-return surface are provided with mutually matching grooves.

[0016] On the other hand, an embodiment of the present invention provides a motor device, comprising: a backstop, which is a backstop as described in any one of the above embodiments; a motor body, having a drive shaft, the drive shaft being connected to a driving force receiving portion of the backstop;

[0017] On the other hand, an embodiment of the present invention provides a curtain control device, comprising: the motor device; a roller, wherein the motor device is disposed inside the roller and can drive the roller to rotate.

[0018] On the other hand, an embodiment of the present invention provides an electric curtain, including: the curtain control device; and a shielding cloth arranged on the roller.

[0019] In summary, the above-mentioned embodiments of the present application may have one or more of the following advantages or beneficial effects: i) the needle roller can be switched between the first direction driving position and the first direction disengagement position, thereby realizing the cooperation or disengagement of the needle roller and the driving force transmission member, so that the first check surface and the second check surface are in check engagement or separation, thereby realizing the check function; this method adopts a plurality of needle rollers and an elastic member in a coordinated manner to realize the check function, and the internal structure is relatively simple and not prone to failure; ii) the second direction driving position is added on the basis of the first direction driving position, and the needle roller can switch between the first direction driving position and the second direction driving position, thereby realizing that the check device can realize the clutch function respectively under the driving force in the first direction (for example, clockwise direction) or the second direction (for example, counterclockwise direction). BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0021] Figure 1 A schematic structural diagram of a backstop 100 provided in the first embodiment of the present invention.

[0022] Figure 2 for Figure 1 An exploded schematic diagram of the backstop 100 is shown.

[0023] Figure 3 for Figure 2 Schematic diagram of the structure of the driving force receiving part 10 and the first control member 21.

[0024] Figure 4 for Figure 2 A schematic diagram of the structure in which the middle needle roller 23 is placed in the first direction driving position 24.

[0025] Figure 5 for Figure 2 A schematic diagram of the structure in which the middle needle roller 23 is placed in the second direction driving position 26.

[0026] Figure 6 for Figure 2 A schematic structural diagram of the middle control sleeve 22.

[0027] Figure 7 for Figure 2 A schematic structural diagram of the middle fixing sleeve 30.

[0028] Figure 8 for Figure 2 A schematic structural diagram of the middle check member 41.

[0029] Fig. 9 A schematic structural diagram of a motor device 200 provided in a second embodiment of the present invention.

[0030] Fig.10 This is a schematic structural diagram of a curtain control device 300 provided in the third embodiment of the present invention.

[0031] Fig.11 This is a schematic structural diagram of an electric curtain 400 provided in a fourth embodiment of the present invention.

[0032] Description of main component symbols:

[0033] 100 is a check valve; 10 is a driving force receiving portion; 11 is a mounting platform; 12 is a driving force receiving member; 20 is a control portion; 21 is a control member; 22 is a control sleeve; 23 is a needle roller; 24 is a first direction driving position; 25 is a first direction disengagement position; 26 is a second direction driving position; 27 is a second direction disengagement position; 28 is a guide position; 30 is a fixed sleeve; 31 is a first check surface; 32 is a fixed buckle; 33 is a fixed housing; 40 is a driving force output portion; 41 is a check member; 42 is an elastic member; 43 is a check sleeve; 44 is a second check surface; 45 is a driving force transmission surface; 46 is a first matching position; 47 is a second matching position;

[0034] 200 is a motor device; 210 is a motor body; 211 is a drive shaft; 220 is an output shaft; 230 is a reducer; 240 is a reducer housing; 241 is an outer housing;

[0035] 300 is a curtain control device; 310 is a roller assembly; 311 is a roller; 312 is a first installation position; 313 is a second installation position; 314 is a transmission wheel;

[0036] 400 is an electric curtain; 410 is a shielding cloth; 420 is a curtain installation part. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] [First embodiment]

[0039] See also Figure 1 and Figure 2 , which is a structural schematic diagram of a backstop 100 provided in the first embodiment of the present invention, the backstop 100 includes, for example, a driving force receiving portion 10, a control portion 20, a fixing sleeve 30 and a driving force output portion 40. The control portion 20 is arranged on one side of the driving force receiving portion 10, and the driving force output portion 40 cooperates with the control portion 20 and is arranged on a side away from the driving force receiving portion 10.

[0040] Specifically, the driving force receiving unit 10 includes, for example, a mounting platform 11 and a driving force receiving member 12. The mounting platform 11 is connected to the control unit 20; the driving force receiving member 12 is disposed on a side of the mounting platform 11 away from the control unit 20 and is used to connect to the motor drive shaft.

[0041] For details, see Figure 2 The control unit 20 includes, for example, a control member 21. The control member 21 is connected to the mounting platform 11 and is located between the driving force receiving unit 10 and the driving force output unit 40; see Figure 3 , a first direction driving position 24 and a first direction disengaging position 25 connected to the first direction driving position 24 are provided on a side of the control member 21 close to the driving force output portion 40 (i.e., a side away from the driving force receiving portion 10). For example, the first control member 21 may be a cylindrical structure, and when the diameter of the first control member 21 is large, two or more first direction driving positions 24 and corresponding two or more first direction disengaging positions 25 may be evenly distributed on a side of the first control member 21 close to the driving force output portion 40.

[0042] Furthermore, the control unit 20 further includes, for example, a control sleeve 22 and a needle roller 23. The needle roller 23 is arranged at the first direction driving position 24 or the first direction disengaging position 25; the control sleeve 22 is sleeved on the outside of the control member 21 and the needle roller 23, and the control sleeve 22 is used to ensure that the needle roller 23 can be located at the first direction driving position 24 or the first direction disengaging position 25, and prevent the needle roller 23 from falling off from the first direction driving position 24 or the first direction disengaging position 25.

[0043] Continue to see Figure 3, the side of the control member 21 away from the driving force receiving portion 10 is also provided with a second direction driving position 26 and a second direction disengaging position 27 connected to the second direction driving position 26, and the first direction disengaging position 25 is connected to the second direction disengaging position 27. Among them, the needle roller 23 can move in the first direction disengaging position 25 and the second direction disengaging position 27, and can move from the first direction driving position 24 to the second direction driving position 26, and of course, can also move from the second direction driving position 26 to the first direction driving position 24. For example, the first direction disengaging position 25 and the second direction disengaging position 27 can be grooves opened on the side wall of the control member 21, and the first direction driving position 24 and the second direction driving position 26 are respectively opened at the connection between the side wall of the control member 21 and the side of the control member 21 close to the driving force output portion 40.

[0044] Preferably, the control member 21 can be provided with two or more relatively arranged first direction driving positions and second direction driving positions 33, and correspondingly two or more first direction disengagement positions 25 and second direction disengagement positions 27. Meanwhile, the control unit 20 is provided with two or more roller needles 23; specifically, one roller needle 23 corresponds to a pair of first direction driving positions and second direction driving positions 33 and a pair of first direction disengagement positions 25 and second direction disengagement positions 27.

[0045] For example, the size of the side of the control member 21 close to the driving force output portion 40 can be provided with two first direction driving positions 24 and two first direction disengaging positions 25 respectively connected thereto, and also provided with second direction driving positions 26 respectively corresponding to the two first direction driving positions 24, and two second direction disengaging positions 27 respectively connected to the two second direction driving positions 26. Figure 4 and Figure 5 The control member 21 is a cylindrical structure, and a first direction driving position 24, a first direction disengagement position 25, a second direction driving position 26 and a second direction disengagement position 27 are set in the half area close to the driving force output part 40; a first direction driving position 24, a first direction disengagement position 25, a second direction driving position 26 and a second direction disengagement position 27 are also set in the other half area of ​​the control member 21 close to the driving force output 60. Figure 4 In the embodiment, the two needle rollers 23 are respectively located at two first direction driving positions 24; and Figure 5 In the embodiment, the two needle rollers 23 are respectively located at two second direction driving positions 26 .

[0046] For further information, see Figure 6, the control sleeve 22 can be a cylindrical structure matching the control member 21, the control sleeve 22 is sleeved on the outside of the control member 21 and the needle roller 23, and the control sleeve 22 can rotate relative to the control member 21 and the needle roller 23. Specifically, the first direction driving position 24 and the first direction disengagement position 25 cooperate to form a first transfer channel, and the second direction driving position 26 and the second direction disengagement position 27 cooperate to form a second transfer channel; the control sleeve 22 is provided with a guide position 28 on the inner side close to the control member 21, and the guide position 28 matches the first transfer channel and the second transfer channel so that the needle roller 23 can move in the first transfer channel and the second transfer channel; of course, when the control member 21 is provided with a plurality of, for example, two, first transfer channels, the corresponding control sleeve 22 can be provided with a plurality of, for example, two, guide positions 28; when the control member 21 is provided with a plurality of, for example, two, first transfer channels and two, second transfer channels, the corresponding control sleeve 22 can be provided with a plurality of, for example, four, guide positions 28.

[0047] For details, see Figure 7 The fixed sleeve 30 is sleeved on the outside of the control part 20, and a first check surface 31 is provided on the side of the fixed sleeve 30 away from the driving force receiving part 10; wherein, the control sleeve 22 is clamped between the control sleeve 30 and the control part 21, and the control sleeve 22 can rotate relative to the fixed sleeve 30.

[0048] For details, see Figure 2 The driving force output part 40 includes, for example, a check member 41, an elastic member 42 and a check sleeve 43. The check member 41 is provided with a second check surface 44 and an elastic mounting position, wherein the second check surface 44 is provided in cooperation with the first check surface 31, and both the first check surface 31 and the second check surface 44 are provided with mutually matching grooves; the elastic mounting position is provided at a side away from the second check surface 44, the elastic member 42 is provided on the elastic mounting position, and the check sleeve 43 is sleeved on the outside of the elastic member 42.

[0049] For further information, see Figure 8 , the driving force output part 40 also includes, for example, a driving force conducting surface 45. The driving force conducting surface 45 and the second check surface 44 are arranged in the same plane, and the second check surface 44 is arranged around the driving force conducting surface 45. A groove is provided at a position corresponding to the first direction driving position 24 on the driving force conducting surface 45, namely, a first matching position 46; a groove is provided at a position corresponding to the second direction driving position 26 on the driving force conducting surface 45, namely, a second matching position 47. Preferably, the needle roller 23 is, for example, arranged as a spherical structure, and the first matching position 46 and the second matching position 47 can be concave arc surface grooves matching the spherical structure.

[0050] For example, when the needle roller 23 is located in the first direction disengagement position 25, the elastic member 42 is in an elastically stretched state, so that the second check surface 44 is also in an elastically stretched state, and is in a check fit with the first check surface 31 through the slot. When the driving force output part 40 is away from one end of the driving force receiving part 10, for example, when receiving a driving force in any direction, the driving force output part 40 will not rotate with the driving force due to the mutual check fit and fixation of the first check surface 31 and the second check surface 44. When the needle roller 23 is located in the first direction driving position 24, that is, when the driving force receiving part 10 obtains torque, the needle roller 23 is clamped between the first direction driving position 24 and the first matching position 46, and the elastic member 42 is in an elastically compressed state, so that the second check surface 44 is also in an elastically compressed state. At this time, the second check surface 44 is separated from the first check surface 31, so that the driving force output part can rotate. Among them, the first direction driving position 24 and the first direction disengaging position 25 are both recessed grooves arranged on the side of the control member 21 close to the driving force output part 40, and the depth of the first direction disengaging position 25 is greater than the depth of the first direction driving position 24; therefore, when the needle roller 23 is located at the first direction driving position 24, the check member 41, the control member 21 and the control sleeve 22 cooperate to clamp the needle roller 23 between the first matching position 46 and the first direction driving position 24; and when the needle roller 23 is located at the first direction disengaging position 25, there is a gap between the first matching position 46 and the needle roller 23, that is, the check member 41 does not contact the needle roller 23. Of course, when the needle roller 23 is located at the second direction driving position 26 or the second direction disengaging position 27, the above functions can also be realized, which will not be repeated here.

[0051] [Second embodiment]

[0052] See also Fig. 9 , which is a schematic structural diagram of a motor device 200 provided in a second embodiment of the present invention. The motor device 200 includes, for example: the check valve 100 as described in the first embodiment and a motor body 210 connected to the check valve 100.

[0053] Specifically, the motor body 210 has a driving shaft 211 for outputting driving force, and the driving shaft 211 is connected to the driving force receiving part 10 of the backstop 100. For example, the driving force receiving member 11 provided on the driving force receiving part 10 is a connecting shaft hole, and the driving shaft 211 is inserted into the connecting shaft hole, so that the motor body 210 outputs a positive or reverse driving force to the driving force receiving part 10.

[0054] The driving force output part 40 of the backstop 100 may also be provided with an output connection position (not shown in the figure), and the output connection position may be connected to the output shaft 220 to output the driving force. For example, the output connection position may be a connection hole with an internal thread, and the output shaft 220 has a threaded connection end matching therewith, and the threaded connection end is inserted into the connection hole to achieve the above purpose.

[0055] Furthermore, the motor device 200, for example, also includes: a reducer 230. The reducer 230 is connected between the motor body 210 and the check valve 100, and a reducer housing 240 is sleeved on the outside of the reducer 230, and is integrally formed with the fixed housing 33, that is, the part of the reducer housing 240 sleeved on the outside of the check valve 100 is the fixed housing 33, and the part sleeved on the outside of the reducer is the outer housing 241; fixedly connected by a limiting structure; the control sleeve 20 is sleeved on the inner side of the fixed sleeve 30, and can rotate relative to the fixed sleeve 30. Specifically, the reducer 230 can be a planetary reducer, and of course it can also be other reducers, which will not be repeated here.

[0056] [Third embodiment]

[0057] See also Fig.10 , which is a structural schematic diagram of a curtain control device 300 provided in the third embodiment of the present invention, the curtain control device 300, for example, comprises: the motor device 200 and the roller assembly 310 as described in the second embodiment. The motor device 200 is placed inside the roller assembly 310, and when the motor device 200 rotates, it drives the roller assembly 310 to rotate.

[0058] Preferably, the reel assembly 310 includes: a reel 311, a first mounting position 312, a second mounting position 313 and a transmission wheel 314; further, a motor body 210 is provided at one end of the motor device 200, and an output shaft 220 is provided at the other end; wherein the motor body 210 is connected to the second mounting position 313, and the output shaft 220 is connected to the transmission wheel 314.

[0059] Preferably, the first mounting position 312 is a mounting tube, which is sleeved on the outside of the motor device 200 and fixedly connected to the motor device 200; the reel 311 is sleeved on the outside of the first mounting position 312, and the transmission wheel 314 is placed inside the reel 311 and fixedly connected to the reel 311; when the motor device 200 rotates, the output shaft 220 can drive the transmission wheel 314 to rotate, and the transmission wheel 314 further drives the reel 311 to rotate.

[0060] Preferably, the motor device 200 can rotate forwards and reverses. When the motor device 200 rotates forwards and reverses, the transmission wheel 314 will drive the roller 311 to rotate forwards and reversely accordingly, thereby realizing the curtain control function.

[0061] [Fourth embodiment]

[0062] See also Fig.11, which is a structural schematic diagram of an electric curtain 400 provided in the fourth embodiment of the present invention, the electric curtain 400, for example, comprises: the curtain control device 300 as described in the third embodiment, a shielding cloth 410 and a curtain installation part 420. The shielding cloth 410 is arranged in conjunction with the curtain control device 300, and two curtain installation parts 420 are provided, which are located on both sides of the curtain control device 300 and are fixedly connected to the wall by bolts and other connecting parts; when the curtain control device 300 is driven, it will rotate forward and reverse, thereby driving the rotation of the shielding cloth 410, so as to achieve the purpose of extending or contracting the curtain.

[0063] Furthermore, the shielding cloth 410 is arranged on the roller 311 on the curtain control device 300, and the motor device 200 drives the transmission wheel 314 to rotate forward and backward through the forward and reverse rotation, so that the roller 311 rotates forward and backward with the transmission wheel 314, thereby adjusting the extension and contraction of the shielding cloth 410 to achieve the function of controlling the extension and retraction of the curtain.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A backstop, characterized in that: include: A driving force receiving part, including a mounting platform and a driving force receiving member; A control unit, disposed on one side of the driving force receiving unit, and the mounting platform is connected to the control unit; A fixed sleeve, which is sleeved on the outer side of the control part and has a first non-return surface on the side away from the driving force receiving part; A driving force output part, which cooperates with the control part and is arranged at a side away from the driving force receiving part, and is provided with a second non-return surface controlled by elasticity; Wherein, the second check surface is in an elastically stretched state, and the first check surface and the second check surface are in check fit; When the driving force receiving part obtains the torque, it drives the control part to cooperate with the driving force output part, so that the second check surface is in an elastic compression state, the second check surface is separated from the first check surface, and the driving force output part can rotate; The driving force output unit comprises: A check member, provided with the second check surface; The elastic member is arranged on a side of the check member away from the driving force receiving portion.

2. The backstop according to claim 1, characterized in that: The control unit includes: A control member connected to the driving force receiving portion, with a first direction driving position and a first direction disengaging position connected to the first direction driving position being provided on a side away from the driving force receiving portion; The needle roller is located at the driving position in the first direction when the second check surface is in an elastic compression state; or, the needle roller is located at the disengagement position in the first direction when the second check surface is in an elastic extension state; A control sleeve is sleeved on the outside of the control member and the needle roller.

3. The backstop according to claim 2, characterized in that: The control member is further provided with a second direction driving position corresponding to the first direction driving position and a second direction disengaging position connected to the second direction driving position on a side away from the driving force receiving portion.

4. The backstop according to claim 2, characterized in that: The driving force output portion is further provided with a driving force conducting surface, the driving force conducting surface and the second non-return surface are in the same plane, and the second non-return surface surrounds the driving force conducting surface; Wherein, when the second check surface is in an elastic compression state, the needle roller is arranged between the driving force transmission surface and the first direction driving position.

5. The backstop according to claim 4, characterized in that: The driving force transmission surface is provided with a groove corresponding to the first direction driving position, and the position of the driving force transmission surface corresponding to the first direction driving position is provided with a first matching position; when the roller needle cooperates with the driving force transmission member, the roller needle is clamped between the first direction driving position and the first matching position.

6. The backstop according to claim 2, characterized in that: The control sleeve is provided with a guide position on the inner side surface close to the control member; Wherein, the first direction driving position cooperates with the first direction disengaging position to form a transfer channel, and the needle roller is clamped between the guide position and the transfer channel; The control sleeve is clamped between the fixing sleeve and the control member, and the control sleeve rotates relative to the fixing sleeve.

7. The backstop according to claim 3, characterized in that: A plurality of first-direction driving positions, a plurality of second-direction driving positions, and a corresponding plurality of first-direction disengagement positions are disposed on a side of the control member away from the driving force receiving portion.

8. The backstop according to claim 1, characterized in that: Also includes: The fixed shell is sleeved on the outside of the driving force receiving portion, and a plurality of fixing grooves are arranged on one side of the fixed shell close to the fixing sleeve.

9. The backstop according to claim 8, characterized in that: The outer side of the fixing sleeve away from the control part is provided with a plurality of fixing buckles; Wherein, each of the fixing buckles is arranged corresponding to each of the fixing slots.

10. The backstop according to claim 1, characterized in that: The first non-return surface and the second non-return surface are provided with mutually matching grooves.

11. A motor device, characterized in that: include: The backstop according to any one of claims 1 to 10; The motor body has a driving shaft, and the driving shaft is connected to the driving force receiving part of the backstop.

12. A curtain control device, characterized in that: include: The motor device according to claim 11; The reel is provided with a motor device inside the reel and can drive the reel to rotate.

13. An electric curtain, characterized in that: include: The curtain control device as claimed in claim 12; The shielding cloth is arranged on the reel.

Images