Backstop, motor device, curtain control device and electric curtain

Abstract

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 portion, provided with a shift block accommodating chamber, a shift fork and an elastic member connected to the shift fork, wherein the shift fork and the elastic member form a first contact surface on the side facing the shift block accommodating chamber; a driving force output portion, arranged in the shift block accommodating chamber, provided with a second contact surface corresponding to the shift fork, and a first sliding surface connected to the second contact surface; a check valve, arranged between the first contact surface and the second contact surface; a check valve sleeve, sleeved on the outside of the check valve, and a gap is provided between the inner wall of the sleeve and the check valve. The present invention can effectively solve the problems that the check valve and the contact surface are prone to slipping, and the check valve structure is relatively complex and has a low service life.

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] Nowadays, electric curtains have entered thousands of households. Electric curtains are automatic or semi-automatic curtains that are driven by motors and control the opening and closing of curtains. Existing electric curtains include opening and closing curtains and rolling curtains. Rolling curtains require a backstop to stop them due to the gravity of the rolling curtains to prevent them from sliding down automatically.

[0003] In the existing check valve, the contact surface between the check valve and the check piece is small. When the motor rotates, the check piece and the contact surface will slip, which will reduce the efficiency of the electric curtain. In addition, the internal structure of the check valve is relatively complex, which can easily cause damage to the inside of the check valve when the electric curtain rotates, reducing its service life. Summary of the invention

[0004] Therefore, the embodiments of the present invention provide a check valve, a motor device, a curtain control device and an electric curtain, which can effectively solve the problems of easy slipping between the check valve and the contact surface, and the complex structure and short service life of the check valve.

[0005] A check valve according to an embodiment of the present invention comprises: a driving force receiving part, provided with a shift block accommodating chamber, a shift fork and an elastic member connected to the shift fork, wherein the shift fork and the elastic member form a first contact surface on a side facing the shift block accommodating chamber; a driving force output part, arranged in the shift block accommodating chamber, provided with a second contact surface corresponding to the shift fork, and a first sliding surface connected to the second contact surface; a check valve, arranged between the first contact surface and the second contact surface; a check valve sleeve, sleeved on the outside of the check valve, and a gap is provided between the inner wall of the sleeve and the check valve; wherein, when the driving force receiving part rotates, the shift fork pushes the check valve to fit tightly between the second contact surface and the first contact surface, thereby driving the driving force output part to rotate; when the driving force output part receives torque, the check valve moves relative to the first sliding surface in a direction toward the inner wall, and fits tightly between the inner wall of the sleeve and the first sliding surface.

[0006] Furthermore, in one embodiment of the present invention, the shift forks are provided in plurality and are circumferentially distributed on the driving force receiving portion; at least one of the plurality of shift forks has a transmission direction opposite to that of the remaining shift forks; correspondingly, the second contact surfaces and the corresponding first sliding surfaces are respectively provided in plurality and are circumferentially distributed on the driving force output portion; wherein the transmission directions of two adjacent shift forks are opposite, and accordingly, the transmission directions of two adjacent second contact surfaces and the corresponding first sliding surfaces are opposite.

[0007] The transmission direction of at least one of the shift forks is opposite to that of the other shift forks, ensuring that the driving force receiving part can push the driving force output part to perform corresponding forward and reverse rotations when the driving force receiving part rotates forward and reversely; the transmission directions of two adjacent shift forks, two adjacent second contact surfaces and the first sliding surface are opposite, ensuring that the driving force output part is subjected to uniform force when rotating forward and reversely, so that the driving force output part can rotate uniformly.

[0008] Furthermore, in one embodiment of the present invention, the driving force receiving part includes: a fork plate, provided with a plurality of the forks and a plurality of the elastic members; an output part sleeve, provided with the shift block accommodating chamber, connected to the side of the fork plate facing the driving force output part, and located between the driving force output part and the check sleeve; the output part sleeve is provided with a first opening at the position where the fork plate is provided with the fork and the elastic member, and the output part sleeve is provided with a check member limiting position corresponding to the first contact surface on the side of the first opening away from the fork plate; the check member is clamped between the first contact surface and the second contact surface, also contacts the check member limiting position, and is exposed to the corresponding first opening.

[0009] The fork plate, the elastic member and the output sleeve are arranged as a whole, which effectively reduces the internal space of the check valve and ensures that the driving force receiving part can evenly push the driving force output part to rotate when rotating; the setting of the check limit position effectively ensures that when the driving force output part is subjected to torque and rotates, the check limit position can make the check valve contact with the inner wall of the check sleeve, thereby preventing the driving force output part from rotating.

[0010] Furthermore, in one embodiment of the present invention, the driving force receiving part also includes: a transmission connecting piece connected to a side of the fork plate away from the output part sleeve; and an inner sleeve disposed inside the output part sleeve and connected to the transmission connecting piece.

[0011] The transmission connecting member is used to connect the driving motor, and the transmission connecting member can receive driving force, thereby achieving the effect of driving the driving force output part to rotate; the setting of the inner sleeve enables the driving force output part to be connected with the driving force receiving part.

[0012] Furthermore, in one embodiment of the present invention, the transmission connection member is a spline.

[0013] The transmission connection member is configured as a spline, and the multiple protrusions of the spline enable the driving force receiving portion to receive the driving force more evenly.

[0014] Furthermore, in one embodiment of the present invention, the fork plate has at least one second opening, and the fork and the corresponding elastic member extend into the second opening.

[0015] The second opening provided on the fork plate enables the check member to contact the first contact surface, thereby enabling the driving force receiving portion to push the check member to rotate; at least one of the second openings can achieve the purpose of placing at least two check members inside the check.

[0016] Furthermore, in one embodiment of the present invention, the fork plate is provided with at least two first bosses; a fork and an elastic member connected thereto are respectively provided on both sides of each first boss extending into the second opening; and the transmission directions of the two forks on both sides of each first boss are opposite.

[0017] At least two of the first bosses extend into the second opening to form the first contact surface. When the driving force receiving portion rotates, the first contact surface pushes the check member to rotate.

[0018] Furthermore, in one embodiment of the present invention, at least two second openings are provided; a shift fork and an elastic member connected thereto are respectively provided on both sides of each second opening; and the transmission directions of the two shift forks on both sides of each second opening are opposite.

[0019] The shift fork disposed at the second opening and the elastic member form the first contact surface, thereby increasing the contact area with the check member and effectively reducing the sliding property between the contact surface and the check member.

[0020] Further, in an embodiment of the present invention, at least two first openings are provided, and one first opening corresponds to one second opening.

[0021] The first opening and the second opening form a limiting position of the backstop, which effectively limits the sliding of the backstop inside the backstop when the backstop receives torque.

[0022] Furthermore, in one embodiment of the present invention, the driving force output part is sleeved between the output part sleeve and the inner sleeve; the driving force output part is provided with at least two second bosses; two second contact surfaces matching the two first contact surfaces are formed on both sides of each second boss, and each side of each second boss extends along the direction toward the adjacent boss to form the first sliding surface.

[0023] The second contact surface and the first sliding surface are formed between two adjacent second bosses provided with the driving force output part. When the driving force output part is provided between the output part sleeve and the inner sleeve, a space in which the check member can move is formed between the second contact surface, the first sliding surface and the first contact surface.

[0024] Further, in one embodiment of the present invention, the driving force receiving portion, the check member and the driving force output portion are coaxially arranged.

[0025] The coaxial arrangement of the driving force receiving portion, the check member and the driving force output portion ensures that when the check member receives the driving force, the driving force output portion and the driving force receiving portion will not move in a mirror image.

[0026] Furthermore, in one embodiment of the present invention, the check valve also includes: a positioning shaft: the driving force receiving part and the driving force output part are sleeved on the outside of the positioning shaft; the driving force receiving part is provided with a first axial hole, and the first axial hole is tightly fitted with the positioning shaft; the inner sleeve is provided with a second axial hole, and the second axial hole is tightly fitted with the positioning shaft.

[0027] The arrangement of the positioning shaft ensures the coaxiality of the internal structure of the backstop, and effectively prevents the internal structures from sliding against each other when the backstop rotates.

[0028] Furthermore, in one embodiment of the present invention, it also includes: a fixing member, which is sleeved on the positioning shaft and close to one end of the inner sleeve, and is used to fix the driving force output part and the driving force receiving part.

[0029] The provision of the fixing member prevents the positioning shaft from moving inside the backstop, thereby effectively enhancing the stability of the internal structure of the backstop.

[0030] On the other hand, in one embodiment of the present invention, a motor device is further provided, comprising: a motor body provided with a drive shaft; a check valve, which is the above-mentioned check valve, and the driving force receiving part of the check valve is connected to the drive shaft.

[0031] The motor body provides driving force for the backstop, and when the motor rotates forward and reverse, it drives the backstop to realize forward and reverse rotation.

[0032] Furthermore, in one embodiment of the present invention, it also includes: a reducer connected between the motor body and the backstop.

[0033] The provision of the reducer ensures that when the backstop is subjected to a driving force, the backstop will not be damaged due to a high motor speed.

[0034] On the other hand, in one embodiment of the present invention, a curtain control device is provided, characterized in that it includes: a driver, which is the above-mentioned motor device; a roller; the driver is arranged inside the roller and can drive the roller to rotate.

[0035] The reel is arranged on the driver, and when the driver rotates forwards and reverses, the driver can drive the reel to rotate forwards and reverses.

[0036] On the other hand, in one embodiment of the present invention, there is also provided an electric curtain, comprising: a curtain control device, which is the above-mentioned curtain control device; and a shielding member, which is arranged on the roller.

[0037] The shielding member is arranged on the roller. When the driver rotates, since the roller is connected to the driver, the roller will rotate under the action of the driving force. Furthermore, the roller will drive the shielding member to rotate, thereby achieving the purpose of extending and contracting the curtain.

[0038] In summary, after adopting the technical solution of the present invention, the following technical effects can be achieved:

[0039] i) the shift fork is connected to the elastic member as a whole to form the first contact surface, thereby increasing the contact area between the check valve and the check member and effectively reducing the relative sliding between the contact surface and the check member;

[0040] ii) the fixing member fixes the positioning shaft so that the positioning shaft does not slide relative to the driving force receiving part and the driving force output part; the driving force receiving part, the driving force output part and the check member are coaxially arranged to effectively prevent mirror image movement between them;

[0041] iii) The driving force receiving part is integrated, which effectively saves materials and increases the service life of the backstop. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] 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.

[0043] Figure 1 A schematic structural diagram of an electric curtain 100 provided in the first embodiment of the present invention;

[0044] Figure 2 for Figure 1 A schematic diagram of the structure of the curtain control device 90;

[0045] Figure 3 for Figure 2 A schematic diagram of the structure of the motor device 40;

[0046] Figure 4 for Figure 3 A partial structural schematic diagram of the motor device 40;

[0047] Figure 5 A schematic structural diagram of a backstop 10 provided in a second embodiment of the present invention;

[0048] Figure 6 for Figure 5 An exploded view of the structure of the backstop 10 is shown;

[0049] Figure 7 for Figure 6 A schematic structural diagram of the middle driving force receiving part 1;

[0050] Figure 8 for Figure 7 The driving force receiving part 1 is shown as a schematic structural diagram from another angle;

[0051] Fig. 9 for Figure 6 A schematic diagram of the structure of the middle driving force output part 2 and the backstop 6;

[0052] Fig.10 for Figure 6 A schematic diagram of the connection structure of the middle driving force output part 2, the backstop 6 and the positioning shaft 5;

[0053] Fig.11 for Figure 6 Schematic diagram of the structure of the middle check sleeve 3.

[0054] Description of main symbols:

[0055] 100 is an electric curtain; 90 is a curtain control device; 50 is a roller assembly; 501 is a roller; 502 is a first mounting position; 503 is a second mounting seat; 504 is a transmission wheel; 60 is a shielding member; 70 is a curtain mounting portion;

[0056] 40 is a motor device; 20 is a reducer; 201 is a gear shaft; 202 is a backstop connection part; 30 is a motor body; 301 is a gear box; 302 is a driving motor; 303 is a rotating gear; 304 is a first fixed position; 305 is a second fixed position;

[0057] 10 is a check valve; 1 is a driving force receiving part; 11 is a fork plate; 12 is a first boss; 121 is a fork; 122 is an elastic member; 13 is a second opening; 14 is a transmission connecting member; 141 is a first axial hole; 15 is an output sleeve; 151 is a first opening; 16 is a check valve limiting position; 17 is an inner sleeve; 171 is a second axial hole; 18 is a shift block accommodating chamber; 2 is a driving force output part; 21 is a second boss; 22 is a second contact surface; 23 is a first sliding surface; 24 is an inner sleeve mounting position; 25 is a positioning shaft hole; 26 is a fixing member mounting position; 27 is a fixing member; 3 is a check valve sleeve; 31 is a third limiting position; 4 is a transmission part; 5 is a positioning shaft; 6 is a check valve; 7 is a retaining spring; 8 is a check valve housing; 81 is a first limiting member; 82 is a second limiting position. DETAILED DESCRIPTION

[0058] 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.

[0059] [First embodiment]

[0060] See also Figure 1 , an embodiment of the present invention provides an electric curtain 100. The electric curtain 100 includes, for example: a shielding member 60, a curtain mounting portion 70, and a curtain control device 90. The shielding member 60 is arranged on the curtain control device 90; two curtain mounting portions 70 are provided, which are respectively connected to the two sides of the curtain control device 90. The two curtain mounting portions 70 can fix the curtain control device 90 to the installation position, such as the two side walls opposite to the window, by fasteners such as bolts or other connecting parts. When the motor device 40 inside the curtain control device 90 drives the external reel 501 to rotate forward or reverse, the shielding member 60 connected to the surface of the reel 501 is correspondingly retracted to the reel 501, thereby realizing the shielding or opening of the shielding member 60 at the window.

[0061] For further information, see Figure 2 The curtain control device 90 includes: a motor device 40 and a roller assembly 50; the motor device 40 is placed inside the roller assembly 50, and when the motor device 40 rotates, it will drive the roller assembly 50 to rotate, and the shielding member 60 is arranged on the roller assembly 50.

[0062] Preferably, the reel assembly 50 includes: a reel 501, a first mounting position 502, a second mounting position 503 and a transmission wheel 504; further, a motor device 40 is provided with a motor body 30 at one end and a transmission part 4 at the other end; wherein the motor body 30 is connected to the second mounting position 503, and the transmission part 4 axis is connected to the transmission wheel 504.

[0063] Preferably, the first mounting portion 502 is a mounting tube, which is sleeved on the outside of the motor device 40 and fixedly connected to the motor device 40; the reel 501 is sleeved on the outside of the first mounting portion 502, and the transmission wheel 504 is placed inside the reel and fixedly connected to the reel 501; when the motor device 40 rotates, the transmission portion 4 can drive the transmission wheel 504 to rotate, and the transmission wheel 504 further drives the reel 501 to rotate.

[0064] Preferably, the shielding member 60 is arranged on the roller 501, and the motor device 40 can rotate forward and reverse. When the motor device 40 rotates forward and reverse, the transmission wheel 504 will drive the roller 501 to rotate forward and reverse accordingly, so that the extension and contraction of the shielding member 60 can be adjusted to achieve the purpose of extending and retracting the curtain.

[0065] Preferably, see Figure 3 and Figure 4 The motor device 40 also includes: a check valve 10 and a reducer 20, one end of the motor body 30 is connected to the check valve 10, and the reducer 20 is connected between the check valve 10 and the motor body 30; the transmission part 4 is arranged at one end of the check valve 10, and the reducer 20 can adjust the rotation speed of the transmission part 4 when the motor device 40 rotates, so as to achieve the purpose of uniform speed when the curtain is extended or contracted.

[0066] Furthermore, the motor body 30 is connected to the reducer 20, wherein the reducer 20 includes: a gear shaft 201 and a check valve connecting portion 202; the motor body 30 includes: a gear box 301, a driving motor 302 and a rotating gear 303, the rotating gear 303 is arranged inside the gear box 301, and the driving motor 302 is connected to the gear box; further, one end of the gear shaft 201 is cooperatively connected to the rotating gear 303, and the other end is connected to the check valve 10.

[0067] [Second embodiment]

[0068] See also Figure 4 and Figure 5The motor body 30 also includes: a first fixing position 304 and a second fixing position 305, which are arranged at one end of the gear box 301 connected to the check valve 10; the check valve 10 includes: a check valve housing 8 and a transmission part 4, one end of the check valve housing 8 is connected to the main motor 30, and the other end is connected to the transmission part 4.

[0069] Furthermore, a first limiting position 81 and a second limiting position 82 are provided on the outer side of the check valve housing 8, the first fixing position 304 cooperates with the first limiting position 81, and the second fixing position 305 cooperates with the second limiting position 82, and the two are used to fix the check valve 10 and the motor body 30 so that when the motor rotates, the motor body 30 and the check valve 10 will not slide relative to each other.

[0070] The embodiment of the present invention provides a backstop 10, see Figure 5 and Figure 6 The check valve 10 also includes: a driving force receiving part 1, a driving force output part 2, a check sleeve 3 and a positioning shaft 5; the check valve housing 8 is sleeved on the outside of the driving force receiving part 1, and the transmission part 4 is connected to the end of the check valve housing 8 away from the driving force receiving part 1; the driving force receiving part 1 and the driving force output part 2 are sleeved on the outside of the positioning shaft 5; the driving force receiving part 1 is provided with a first axial hole 141, and the first axial hole 141 is tightly fitted with the positioning shaft 5; the inner sleeve 17 is provided with a second axial hole 171, and the second axial hole 171 is tightly fitted with the positioning shaft 5; the positioning shaft 5 passes through the first axial hole and is connected to the reducer 20.

[0071] Furthermore, the arrangement of the positioning shaft 5 ensures the coaxiality between the internal structures of the backstop 10 , and effectively prevents the internal structures from sliding against each other when the backstop 10 rotates.

[0072] Preferably, see Figure 7 and Figure 8 The driving force receiving part 1 is provided with a shift block accommodating chamber 18, a shift fork 121 and an elastic member 122 connected to the shift fork 121, wherein the shift fork 121 and the elastic member 122 form a first contact surface on the side facing the shift block accommodating chamber 18; a plurality of shift forks 121 are provided and circumferentially distributed on the driving force receiving part 1; at least one of the plurality of shift forks 121 has a transmission direction opposite to that of the remaining shift forks.

[0073] Furthermore, at least one shift fork 121 has a transmission direction opposite to that of the other shift forks, thereby ensuring that the driving force receiving part 1 can push the driving force output part 2 to perform corresponding forward and reverse rotations when the driving force receiving part 1 rotates forward and reversely.

[0074] Preferably, the driving force receiving part 1 includes: a fork plate 11, an output sleeve 15, a transmission connecting member 14 and an inner sleeve 17; the fork plate 11 is provided with a plurality of forks 121 and a plurality of elastic members 122; the output sleeve 15 is provided with a shift block accommodating chamber 18, which is connected to the side of the fork plate 11 facing the driving force output part 2 and is located between the driving force output part 2 and the check sleeve 3; the transmission connecting member 14 is connected to the side of the fork plate 11 away from the output sleeve 2; the inner sleeve 17 is arranged inside the output sleeve 15 and connected to the transmission connecting member 14, wherein an installation gap for installing the driving force output part 2 is provided between the inner sleeve 17 and the output sleeve; for example, the transmission connecting member 14 is a spline, so that the driving force received by the driving force receiving part 1 is more uniform.

[0075] Furthermore, when the motor body 30 generates driving force, since the rotating gear 303 is connected to the gear shaft 201 , the reducer 20 is driven to rotate, thereby further pushing the driving force receiving part 1 to rotate.

[0076] Preferably, the fork plate 11 has at least one second opening 13, and the fork 121 and the corresponding elastic member 122 extend into the second opening 13; further, the fork plate 11 has at least two first bosses 12; each first boss 12 extending into the second opening 13 has a fork 121 and an elastic member 122 connected thereto on both sides thereof; the transmission directions of the two forks 121 on both sides of each first boss 12 are opposite.

[0077] Furthermore, the output sleeve 15 is provided with a first opening 151 at the position where the fork 121 and the elastic member 122 are provided on the fork plate 11, and the output sleeve 15 is provided with a check member limiting position 16 corresponding to the first contact surface on the side of the first opening 151 away from the fork plate 11; at least two first openings 151 are provided, and one first opening 151 corresponds to one second opening 13.

[0078] Preferably, at least two second openings 13 are provided; a shift fork 121 and an elastic member 122 connected thereto are respectively provided on both sides of each second opening 13; and the transmission directions of the two shift forks 121 on both sides of each second opening 13 are opposite.

[0079] Preferably, see Fig. 9 and Fig.10 The driving force output part 2 is sleeved between the output part sleeve 15 and the inner sleeve 17; the driving force output part 2 is provided with at least two second bosses 21; two second contact surfaces 22 matching the two first contact surfaces are formed on both sides of each second boss 21, and each side of each second boss 21 extends along the direction toward the adjacent boss to form a first sliding surface 23.

[0080] Furthermore, the driving force output portion 2 is arranged in the shift block accommodating cavity 18, and is provided with a second contact surface 22 corresponding to the shift fork 121, and a first sliding surface 23 connected to the second contact surface 22; the check member 6 is arranged between the first contact surface and the second contact surface 22; the check sleeve 3 is sleeved on the outside of the check member 6, and the inner wall of the sleeve is spaced from the check member 6; wherein the check member 6 is clamped between the first contact surface and the second contact surface 202, and also contacts the check member limiting position 16, and is exposed to the corresponding first opening 151.

[0081] Preferably, the second contact surfaces 22 and the corresponding first sliding surfaces 23 are respectively provided in plurality and circumferentially distributed on the driving force output portion 2; wherein, the transmission directions of two adjacent forks 121 are opposite, and accordingly, the transmission directions of two adjacent second contact surfaces 22 and the corresponding first sliding surfaces 23 are opposite.

[0082] Furthermore, when the driving force receiving part 1 is subjected to driving force, the first contact surface will push the check member 6 to slide toward the second contact surface 22, thereby promoting the rotation of the driving force output part 2; since the transmission directions of the two adjacent second contact surfaces 22 and the first sliding surface 23 are opposite, the driving force receiving part 1 can realize the forward and reverse rotation of the driving force output part 2 when receiving the driving force.

[0083] Furthermore, the transmission of two adjacent shift forks 121, two adjacent second contact surfaces 22 and the first sliding surface 23 in opposite directions ensures that the driving force output part 2 is subjected to uniform force during forward and reverse rotations, so that the driving force output part 2 can rotate uniformly.

[0084] Preferably, the backstop 10 further includes: a fixing member 27 ; which is sleeved on the positioning shaft 5 and close to one end of the inner sleeve 17 , and is used to fix the driving force output part 2 and the driving force receiving part 1 .

[0085] Preferably, the driving force output part 2 is provided with an inner sleeve mounting position 24, a positioning shaft hole 25 and a fixing part mounting position 26; the inner sleeve mounting position 24 is arranged on a side close to the transmission connecting part 14, the positioning shaft hole 25 is opened in the middle of the driving force output part 2, and the fixing part mounting position 26 is arranged on a side of the driving force output part 2 away from the transmission connecting part 14.

[0086] Furthermore, the fixing member 27 is cooperatively connected with the fixing member mounting position 26 to fix the driving force output part 2 and the positioning shaft 5; the inner sleeve 17 and the inner sleeve mounting position 24 are matched with each other, and when the driving force output part 1, the fixing member 27 and the driving force output part 2 are connected, the positioning shaft 5 passes through the first shaft hole 141, the second shaft hole 171 and the positioning shaft hole 25.

[0087] Preferably, the setting of the fixing member 27 prevents the positioning shaft 5 from moving inside the backstop 10, effectively enhancing the stability of the connection between the various structures inside the backstop 10 and further ensuring the coaxiality of the connection.

[0088] Preferably, see Fig.11 The check valve 10 also includes: a check sleeve 3, which is sleeved between the output sleeve 15 and the check valve housing 8; the check sleeve 3 has at least one third limiting position 31 on its outer surface, and the check sleeve 3 is fixed to the inner wall of the check valve housing 8 through the third limiting position 31; when the check member 6 is exposed to the first opening 151, the check member 6 contacts the inner wall of the check sleeve 3.

[0089] Furthermore, when the driving force output part 2 is subjected to external force, the first sliding surface 23 will push the check member 6 to slide toward the second contact surface 22. Due to the existence of the first sliding surface 23, the check member 6 will slide outward in a centrifugal motion, thereby contacting the inner wall of the check sleeve 3. However, since the check sleeve 3 is fixedly connected to the check housing 8, the check member 6 will be prevented from rotating, thereby preventing the driving force output part 2 from rotating.

[0090] Furthermore, since the transmission directions of the two connected second contact surfaces 22 and the first sliding surface 23 connected thereto are opposite, and the transmission directions of the two adjacent check members 6 are opposite, when the driving force output part 2 is subjected to torque, regardless of whether it rotates forward or backward, the second contact surface 22 and the first sliding surface 23 can effectively prevent the check member 6 from sliding, thereby preventing the driving force output part 2 from rotating and achieving a check effect.

[0091] 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 portion, provided with a shift block accommodating cavity, a shift fork and an elastic member connected to the shift fork, wherein the shift fork and the elastic member form a first contact surface on a side facing the shift block accommodating cavity; A driving force output portion is disposed in the shift block accommodating cavity and is provided with a second contact surface corresponding to the shift fork and a first sliding surface connected to the second contact surface; a check member, disposed between the first contact surface and the second contact surface; A check sleeve, which is sleeved on the outside of the check piece, and a gap is provided between the inner wall of the sleeve and the check piece; Wherein, when the driving force receiving part rotates, the shift fork pushes the check member to be tightly fitted between the second contact surface and the first contact surface, thereby driving the driving force output part to rotate; When the driving force output part receives torque, the backstop moves relative to the first sliding surface in a direction toward the inner wall and is tightly fitted between the inner wall of the sleeve and the first sliding surface; The driving force receiving part comprises: a fork plate, an output part sleeve, a transmission connecting member and an inner sleeve; the fork plate is provided with a plurality of the forks and a plurality of the elastic members; the output part sleeve is provided with the shift block accommodating chamber, connected to the side of the fork plate facing the driving force output part and located between the driving force output part and the check sleeve; the transmission connecting member is connected to the side of the fork plate away from the output part sleeve; the inner sleeve is arranged inside the output part sleeve and connected to the transmission connecting member; Wherein, the driving force output part is sleeved between the output part sleeve and the inner sleeve; the driving force output part is provided with at least two second bosses; two second contact surfaces matching the two first contact surfaces are formed on both sides of each second boss, and each side of each second boss extends along the direction toward the adjacent boss to form the first sliding surface.

2. The backstop according to claim 1, characterized in that: The shift forks are provided in plurality and are circumferentially distributed on the driving force receiving portion; at least one of the plurality of shift forks has a transmission direction opposite to that of the other shift forks; Correspondingly, the second contact surface and the corresponding first sliding surface are respectively provided in plurality and circumferentially distributed on the driving force output portion; The transmission directions of two adjacent shift forks are opposite, so correspondingly, the transmission directions of two adjacent second contact surfaces and the corresponding first sliding surface are opposite.

3. The backstop according to claim 1, characterized in that: The output sleeve is provided with a first opening at the position where the fork plate is provided with a fork and an elastic member, and the output sleeve is provided with a stop member limiting position corresponding to the first contact surface on the side of the first opening away from the fork plate; the stop member is clamped between the first contact surface and the second contact surface, and also contacts the stop member limiting position and is exposed to the corresponding first opening.

4. The backstop according to claim 3, characterized in that: The transmission connecting piece is a spline.

5. The backstop according to claim 3, characterized in that: The fork plate is provided with at least one second opening, and the fork and the corresponding elastic member extend into the second opening.

6. The backstop according to claim 5, characterized in that: The shift fork plate is provided with at least two first bosses; each of the first bosses extending into the second opening is provided with a shift fork and an elastic member connected thereto on both sides thereof; The transmission directions of the two shift forks on both sides of each first boss are opposite.

7. The backstop according to claim 5, characterized in that: There are at least two second openings; each of the two sides of the second opening is provided with a shift fork and an elastic member connected thereto; The transmission directions of the two shift forks on both sides of each second opening are opposite.

8. The backstop according to claim 7, characterized in that: At least two first openings are provided, and one first opening corresponds to one second opening.

9. The backstop according to claim 3, characterized in that: The driving force receiving portion, the check member, and the driving force output portion are coaxially arranged.

10. The backstop according to claim 9, characterized in that: The backstop also includes: a positioning shaft: The driving force receiving portion and the driving force output portion are sleeved outside the positioning shaft; The driving force receiving portion is provided with a first shaft hole, and the first shaft hole is tightly fitted with the positioning shaft; The inner sleeve is provided with a second axial hole, and the second axial hole is tightly fitted with the positioning shaft.

11. The backstop according to claim 10, characterized in that: Also includes: A fixing member is sleeved on the positioning shaft and close to one end of the inner sleeve, and is used to fix the driving force output part and the driving force receiving part.

12. A motor device, characterized in that: include: The motor body is provided with a driving shaft; The backstop is a backstop as described in any one of claims 1 to 11, wherein the driving force receiving portion of the backstop is connected to the driving shaft.

13. The motor device according to claim 12, characterized in that: Also includes: A reducer is connected between the motor body and the backstop.

14. A curtain control device, characterized in that: include: A driver, which is a motor device as claimed in any one of claims 12 to 13; The reel is provided with a driver inside the reel and can drive the reel to rotate.

15. An electric curtain, characterized in that: include: A curtain control device, which is the curtain control device as claimed in claim 14; The shielding member is arranged on the reel.

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