CN213807493U - Backstop, motor device, curtain control device and electric curtain - Google Patents

Abstract

The utility model discloses a backstop, motor device, (window) curtain controlling means and electric window curtain. The backstop includes: the driving force receiving part is provided with a shifting block accommodating cavity, a shifting fork and an elastic part connected with the shifting fork, wherein a first contact surface is formed on one side, facing the shifting block accommodating cavity, of the shifting fork and the elastic part; the driving force output part is arranged in the shifting block accommodating cavity and is provided with a second contact surface corresponding to the shifting fork and a first sliding surface connected with the second contact surface; a backstop disposed between the first contact surface and the second contact surface; the non-return sleeve is sleeved outside the non-return piece, and the inner wall of the sleeve is spaced from the non-return piece. The utility model discloses can effectively solve contrary piece and the contact surface and easily form the problem of skidding and contrary ware structure comparatively complicated, life is lower.

Description

Backstop, motor device, curtain control device and electric curtain

Technical Field

The utility model relates to a (window) curtain control technical field especially relates to a backstop, a motor device, a (window) curtain controlling means and an electric window curtain.

Background

Nowadays, electric curtains are moved into every family, and the electric curtains are automatic or semi-automatic curtains which are driven by motors and control the curtains to open and close. The existing electric curtain comprises an opening and closing type curtain and a rolling curtain, wherein the rolling curtain needs a backstop for stopping due to the gravity of the rolling curtain, so that the rolling curtain is prevented from automatically sliding down.

Among the present backstop, the contact surface of backstop and backstop spare is less, when the motor rotates, can make to form between backstop spare and the contact surface and skid, can reduce electric window curtain's availability factor, and backstop inner structure is comparatively complicated, causes the harm to backstop inside easily when electric window curtain rotates, reduces its life.

SUMMERY OF THE UTILITY MODEL

Therefore, the embodiment of the utility model provides a backstop, a motor device, a (window) curtain controlling means and an electric window curtain can effectively solve contrary piece and the contact surface and easily form the problem of skidding and the backstop structure is comparatively complicated, life is lower.

The embodiment of the utility model provides a pair of backstop, include: the driving force receiving part is provided with a shifting block accommodating cavity, a shifting fork and an elastic part connected with the shifting fork, wherein a first contact surface is formed on one side, facing the shifting block accommodating cavity, of the shifting fork and the elastic part; the driving force output part is arranged in the shifting block accommodating cavity and is provided with a second contact surface corresponding to the shifting fork and a first sliding surface connected with the second contact surface; a backstop disposed between the first contact surface and the second contact surface; the non-return sleeve is sleeved outside the non-return piece, and the inner wall of the sleeve is spaced from the non-return piece; when the driving force receiving part rotates, the shifting fork pushes the non-return part to be tightly matched between the second contact surface and the first contact surface, so that the driving force output part is driven to rotate; when the driving force output part receives torque, the reverse stop piece moves relative to the first sliding surface along the direction towards the inner wall and is tightly matched between the inner wall of the sleeve and the first sliding surface.

Further, in an embodiment of the present invention, the plurality of shifting forks are circumferentially distributed on the driving force receiving portion; at least one of the plurality of shifting forks and the rest shifting forks have opposite transmission directions; correspondingly, the second contact surface and the corresponding first sliding surface are respectively provided with a plurality of sliding surfaces which are circumferentially distributed on the driving force output part; the transmission directions of two adjacent shifting forks are opposite, so that the transmission directions of two adjacent second contact surfaces and the corresponding first sliding surfaces are opposite correspondingly.

The transmission direction of at least one shifting fork is opposite to that of the rest shifting forks, so that the driving force receiving part can push the driving force output part to perform corresponding forward and reverse rotation when the driving force receiving part rotates forward and reversely; two adjacent shift forks, two adjacent second contact surface and first glide plane transmission is reverse opposite has guaranteed the even of atress when positive and negative rotation of drive power output part makes the rotation that drive power output part can be even.

Further, in an embodiment of the present invention, the driving force receiving portion includes: the shifting fork plate is provided with a plurality of shifting forks and a plurality of elastic pieces; the output part sleeve is provided with the shifting block accommodating cavity, is connected to one side of the shifting fork plate facing the driving force output part and is positioned between the driving force output part and the non-return sleeve; the output part sleeve is provided with a first opening at the position where the shifting fork and the elastic part are arranged on the shifting fork plate, and one side of the output part sleeve, which is far away from the shifting fork plate, of the first opening is provided with a non-return part limiting position corresponding to the first contact surface; the check member is clamped between the first contact surface and the second contact surface, contacts the check member limiting position and is exposed to the corresponding first opening.

The shifting fork plate, the elastic piece and the output part sleeve are arranged into a whole, so that the internal space of the backstop is effectively reduced, and the driving force receiving part can be ensured to uniformly push the driving force output part to rotate when rotating; the setting of contrary restriction position has effectually guaranteed contrary piece is in when driving force output portion receives the moment of torsion and rotates, contrary restriction position can make contrary piece with the contact of contrary sleeve inner wall that ends to the prevention drive force output portion's rotation.

Further, in an embodiment of the present invention, the driving force receiving portion further includes: the transmission connecting piece is connected to one side, far away from the output part sleeve, of the shifting fork plate; and the inner sleeve is arranged inside the output part sleeve and is connected to the transmission connecting piece.

The transmission connecting piece is used for connecting a driving motor and can receive driving force, so that the effect of driving the driving force output part to rotate is realized; the inner sleeve is provided to connect the driving force output portion and the driving force receiving portion.

Further, in an embodiment of the present invention, the transmission connecting member is a spline.

The transmission connecting piece is provided with a spline, and the driving force receiving part receives driving force more uniformly due to the plurality of bulges of the spline.

Further, in an embodiment of the present invention, the fork plate is opened with at least one second opening, and the fork and the corresponding elastic member extend into the second opening.

The second opening is arranged on the shifting fork plate, so that the reverse stop piece is contacted on the first contact surface, and the driving force receiving part pushes the reverse stop piece to rotate; at least one of the second openings enables the purpose of placing at least two of the backstops inside the backstop.

Further, in an embodiment of the present invention, the fork plate is provided with at least two first bosses; each first boss extends into two sides of the second opening and is provided with one shifting fork and one elastic piece connected with the shifting fork; the transmission directions of the two shifting forks on the two sides of each first boss are opposite.

At least two first bosses extend into the second opening to form the first contact surface, and when the driving force receiving part rotates, the first contact surface pushes the anti-stop piece to rotate.

Further, in an embodiment of the present invention, at least two second openings are provided; two sides of each second opening are respectively provided with one shifting fork and one elastic piece connected with the shifting fork; and the transmission directions of the two shifting forks on two sides of each second opening are opposite.

The shift fork that the second opening set up with the elastic component has formed first contact surface, increased with the area of contact of contrary piece that ends, effectual reduction the contact surface with the slidability between the contrary piece that ends.

Further, in an embodiment of the present invention, the first opening is provided with at least two, and one of the first openings corresponds to one of the second openings.

The first opening and the second opening form the check member limiting position, and the sliding of the check member in the backstop is effectively limited when the check member receives torque.

Further, in an embodiment of the present invention, the driving force output portion is sleeved between the output portion sleeve and the inner sleeve; the driving force output part is provided with at least two second bosses; two second contact surfaces matched with the two first contact surfaces are formed on two sides of each second boss respectively, and each side of each second boss extends along the direction towards the adjacent boss to form the first sliding surface.

Drive adjacent two that power output part set up form between the second boss the second contact surface and first glide plane, drive power output part locate the output part sleeve with during between the inner skleeve, the second contact surface first glide plane and formed between the first contact surface but the mobilizable space of contrary stopper.

Further, in an embodiment of the present invention, the driving force receiving portion, the stopping member, and the driving force output portion are coaxially disposed.

The driving force receiving part, the reverse stopping piece and the driving force output part are coaxially arranged, so that when the reverse stopper receives driving force, the driving force output part and the driving force receiving part cannot move in a mirror mode.

Further, in an embodiment of the present invention, the backstop further includes: positioning a shaft: the driving force receiving part and the driving force output part are sleeved outside the positioning shaft; the driving force receiving part is provided with a first shaft hole, and the first shaft hole is tightly matched with the positioning shaft; the inner sleeve is provided with a second shaft hole, and the second shaft hole is in tight fit with the positioning shaft.

The setting of location axle has guaranteed the axiality of backstop inner structure, has effectually prevented backstop is when rotating, the mutual slip between each structure of inside.

Further, in an embodiment of the present invention, the present invention further includes: the fixing piece is sleeved on the positioning shaft, is close to one end of the inner sleeve and is used for fixing the driving force output part and the driving force receiving part.

The setting of mounting makes the location axle is in the inside removal that can not form of backstop, the effectual reinforcing the steadiness of backstop inner structure.

On the other hand, in an embodiment of the present invention, there is also provided a motor apparatus, including: a motor body provided with a driving shaft; and a check device as described above, the driving force receiving portion of the check device being connected to the driving shaft.

The motor body provides driving force for the backstop, and when the motor rotates forwards and backwards, the motor drives the backstop to rotate forwards and backwards.

Further, in an embodiment of the present invention, the present invention further includes: and the speed reducer is connected between the motor body and the backstop.

The setting of reduction gear has guaranteed the backstop is when receiving drive power, can not cause because of the motor speed is when very fast the damage of backstop.

In another aspect, in an embodiment of the present invention, there is provided a curtain control device, including: a driver which is the motor device; a reel; the driver is arranged in the winding drum and can drive the winding drum to rotate.

The winding drum is arranged on the driver, and when the driver rotates forwards and backwards, the driver can drive the winding drum to rotate forwards and backwards.

In another aspect, in an embodiment of the present invention, there is provided a motorized window treatment including: a curtain control device, which is the curtain control device; the shielding piece is arranged on the winding drum.

The shielding piece is arranged on the winding drum, when the driver rotates, the winding drum is connected to the driver, so that the winding drum can rotate under the action of driving force, and further, the winding drum can drive the shielding piece to rotate, so that the purposes of stretching and contracting the curtain are achieved.

To sum up, adopt the technical scheme of the utility model afterwards, can reach following technological effect:

i) the shifting fork and the elastic part are connected into a whole to form the first contact surface, so that the contact area of the backstop and the backstop is increased, and the relative sliding between the contact surface and the backstop is effectively reduced;

ii) the fixing member fixes the positioning shaft so that the positioning shaft does not slip with respect to the driving force receiving portion and the driving force output portion; the driving force receiving part, the driving force output part and the reverse stopping piece are coaxially arranged, so that mirror image movement among the driving force receiving part, the driving force output part and the reverse stopping piece is effectively prevented;

iii) the driving force receiving part is arranged into a whole, so that the material is effectively saved, and the service life of the backstop is prolonged.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a motorized window shade 100 according to a first embodiment of the present invention;

FIG. 2 is a schematic view of the curtain control apparatus 90 of FIG. 1;

fig. 3 is a schematic structural view of the motor device 40 in fig. 2;

fig. 4 is a partial structural schematic view of the motor device 40 in fig. 3;

fig. 5 is a schematic structural diagram of a backstop 10 according to a second embodiment of the present invention;

fig. 6 is an exploded view of the construction of the backstop 10 shown in fig. 5;

fig. 7 is a schematic structural view of the driving force receiving portion 1 in fig. 6;

fig. 8 is another angle structure diagram of the driving force receiving portion 1 shown in fig. 7;

fig. 9 is a schematic structural view of the driving force output part 2 and the check member 6 in fig. 6;

fig. 10 is a schematic view of a connection structure of the driving force output part 2, the check member 6 and the positioning shaft 5 in fig. 6;

fig. 11 is a schematic structural view of the check sleeve 3 in fig. 6.

Description of the main symbols:

100 is an electric curtain; 90 is a curtain control device; 50 is a reel assembly; 501, a winding drum; 502 is a first mounting location; 503 is a second mounting seat; 504 is a driving wheel; 60 is a shielding piece; 70 is a curtain mounting part;

40 is a motor device; 20 is a reducer; 201 is a gear shaft; 202 is a backstop connecting part; 30 is a motor body; 301 is a gear box; 302 is a driving motor; 303 is a rotating gear; 304 is the first fixed bit; 305 is the second fixed bit;

10 is a backstop; 1 is a driving force receiving portion; 11 is a shifting fork plate; 12 is a first boss; 121 is a shifting fork; 122 is an elastic member; 13 is a second opening; 14 is a transmission connecting piece; 141 is a first shaft hole; 15 is an output sleeve; 151 is a first opening; 16 is a check part limiting position; 17 is an inner sleeve; 171 is a second shaft hole; 18 is a shifting block accommodating cavity; 2 a driving force output portion; 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 piece mounting position; 27 is a fixing piece; 3 is a non-return sleeve; 31 is a third limit bit; 4 is a transmission part; 5 is a positioning shaft; 6 is a check piece; 7 is a clamp spring; 8 is a backstop shell; 81 is a first limiting member; and 82 is a second limit bit.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

[ first embodiment ] A method for manufacturing a semiconductor device

Referring to fig. 1, an embodiment of the present invention provides a motorized window treatment 100. The motorized window treatment 100 includes, for example: a shade 60, a shade mounting portion 70, and a shade control device 90, the shade 60 being disposed on the shade control device 90; the two curtain mounting portions 70 are respectively connected to two sides of the curtain control device 90, and the two curtain mounting portions 70 can fixedly connect the curtain control device 90 to a position to be installed, such as two side walls opposite to the window, by fasteners, such as bolts or other connecting members. When the motor device 40 inside the window curtain control device 90 drives the external winding drum 501 to rotate forward or backward, the shielding element 60 connected to the surface of the winding drum 501 is correspondingly wound on the winding drum 501, so that the shielding element 60 can be shielded or opened at the window.

Further, referring to fig. 2, the window covering control device 90 includes: the motor device 40 and the reel assembly 50; the motor device 40 is disposed inside the roller assembly 50, and when the motor device 40 rotates, the roller assembly 50 is driven to rotate, and the shielding member 60 is disposed on the roller assembly 50.

Preferably, the mandrel assembly 50 comprises: a winding drum 501, a first mounting position 502, a second mounting position 503 and a driving wheel 504; further, one end of the motor device 40 is provided with a motor body 30, and the other end is provided with a transmission part 4; wherein, the motor body 30 is connected to the second mounting position 503, and the transmission part 4 is connected to the transmission wheel 504.

Preferably, the first mounting portion 502 is a mounting tube, and the mounting tube is sleeved outside the motor device 40 and is fixedly connected with the motor device 40; the winding drum 501 is sleeved outside the first mounting portion 502, and at this time, the driving wheel 504 is arranged inside the winding drum and is fixedly connected with the winding drum 501; when the motor device 40 rotates, the transmission part 4 can drive the transmission wheel 504 to rotate, and further the transmission wheel 504 drives the winding drum 501 to rotate.

Preferably, the shielding element 60 is disposed on the winding drum 501, the motor device 40 can rotate forward and backward, and when the motor device 40 rotates forward and backward, the driving wheel 504 can drive the winding drum 501 to rotate forward and backward, so as to adjust the extension and contraction of the shielding element 60, and achieve the purpose of extending and retracting the curtain.

Preferably, referring to fig. 3 and 4, the motor device 40 further includes: the motor comprises a backstop 10 and a speed reducer 20, wherein one end of a motor body 30 is connected to the backstop 10, and the speed reducer 20 is connected between the backstop 10 and the motor body 30; the transmission part 4 is arranged at one end of the backstop 10, and the speed reducer 20 can adjust the rotating speed of the transmission part 4 when the motor device 40 rotates, so that the aim of uniformity of the speed of the curtain during extension or contraction is fulfilled.

Further, the motor body 30 is connected to the decelerator 20, wherein the decelerator 20 includes: a gear shaft 201 and a backstop connecting part 202; the motor body 30 includes: the gear box 301, the driving motor 302 and the rotating gear 303, wherein 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 connected with the rotating gear 303 in a matching manner, and the other end is connected to the backstop 10.

[ second embodiment ]

Referring to fig. 4 and 5, the motor body 30 further includes: a first fixing position 304 and a second fixing position 305, which are arranged at one end of the gear box 301 connected with the backstop 10; the backstop 10 includes: the non-return device comprises a non-return device shell 8 and a transmission part 4, wherein one end of the non-return device shell 8 is connected to the body motor 30, and the other end of the non-return device shell 8 is connected to the transmission part 4.

Further, a first limiting position 81 and a second limiting position 82 are disposed outside the backstop housing 8, the first fixing position 304 is matched with the first limiting position 81, and the second fixing position 305 is matched with the second limiting position 82, which are used for fixedly connecting the backstop 10 and the motor body 30, so that when the motor rotates, the motor body 30 and the backstop 10 cannot slide relatively.

The embodiment of the utility model provides a backstop 10, see fig. 5 and fig. 6, backstop 10 still includes: a driving force receiving part 1, a driving force output part 2, a non-return sleeve 3 and a positioning shaft 5; the backstop shell 8 is sleeved outside the driving force receiving part 1, and the transmission part 4 is connected to one end, far away from the driving force receiving part 1, of the backstop shell 8; the driving force receiving part 1 and the driving force output part 2 are sleeved outside the positioning shaft 5; the driving force receiving part 1 is provided with a first shaft hole 141, and the first shaft hole 141 is in over-tight fit with the positioning shaft 5; the inner sleeve 17 is provided with a second shaft hole 171, the second shaft hole 171 being over-tightly fitted to the positioning shaft 5; the positioning shaft 5 is connected to the speed reducer 20 through the first shaft hole.

Furthermore, the coaxiality of the structures in the backstop 10 is ensured by the positioning shaft 5, and the structures in the backstop 10 are effectively prevented from sliding mutually when rotating.

Preferably, referring to fig. 7 and 8, the driving force receiving part 1 is provided with a block accommodating chamber 18, a shift fork 121, and an elastic member 122 connecting the shift fork 121, wherein the shift fork 121 and the elastic member 122 form a first contact surface toward a side of the block accommodating chamber 18; the plurality of shifting forks 121 are circumferentially distributed on the driving force receiving part 1; at least one of the plurality of forks 121 is driven in the opposite direction to the remaining forks.

Furthermore, at least one shifting fork 121 is opposite to the transmission direction of the other shifting forks, so that the driving force output part 2 can be pushed to rotate forwards and backwards correspondingly when the driving force receiving part 1 rotates forwards and backwards.

Preferably, the driving force receiving portion 1 includes: a fork plate 11, an output sleeve 15, a transmission connecting piece 14 and an inner sleeve 17; a fork plate 11 provided with a plurality of forks 121 and a plurality of elastic members 122; the output part sleeve 15 is provided with a shifting block accommodating cavity 18, is connected to one side of the shifting fork plate 11 facing the driving force output part 2 and is positioned between the driving force output part 2 and the non-return sleeve 3; the transmission connecting piece 14 is connected to one side, far away from the output part sleeve 2, of the shifting fork plate 11; an inner sleeve 17 provided inside the output portion sleeve 15 and connected to the transmission connecting member 14, wherein an installation space for installing the driving force output portion 2 is provided between the inner sleeve 17 and the output portion sleeve; for example, the transmission connecting member 14 is a spline, so that the driving force received by the driving force receiving portion 1 is more uniform.

Further, when the motor body 30 generates a driving force, the rotation gear 303 is connected to the gear shaft 201, so that the reducer 20 is driven to rotate, and the driving force receiving portion 1 is further pushed to rotate.

Preferably, the fork plate 11 is provided with at least one second opening 13, and the fork 121 and the corresponding elastic member 122 extend into the second opening 13; further, the shifting fork plate 11 is provided with at least two first bosses 12; each first boss 12 extends into two sides of the second opening 13 and is respectively provided with a shifting fork 121 and an elastic piece 122 connected with the shifting fork 121; the two forks 121 on both sides of each first boss 12 are driven in opposite directions.

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

Preferably, at least two second openings 13 are provided; two sides of each second opening 13 are respectively provided with a shifting fork 121 and an elastic piece 122 connected with the shifting fork 121; the two forks 121 on both sides of each second opening 13 are driven in opposite directions.

Preferably, referring to fig. 9 and 10, the driving force output part 2 is sleeved between the output part sleeve 15 and the inner sleeve 17; the driving force output portion 2 is provided with at least two second bosses 21; two second contact surfaces 22 matching with the two first contact surfaces are respectively formed on two sides of each second boss 21, and each side of each second boss 21 extends in a direction toward the adjacent boss to form a first sliding surface 23.

Further, the driving force output portion 2 is provided in the block accommodating chamber 18, and is provided with a second contact surface 22 corresponding to the shift fork 121 and a first sliding surface 23 connecting the second contact surface 22; a backstop 6 provided between the first contact surface and the second contact surface 22; the non-return sleeve 3 is sleeved outside the non-return piece 6, and the inner wall of the sleeve is spaced from the non-return piece 6; the check member 6 is sandwiched between the first contact surface and the second contact surface 202, contacts the check member limiting position 16, and is exposed to the corresponding first opening 151.

Preferably, the second contact surface 22 and the corresponding first sliding surface 23 are respectively provided in plurality and circumferentially distributed on the driving force output portion 2; the transmission directions of two adjacent shift forks 121 are opposite, so that the transmission directions of two adjacent second contact surfaces 22 and the corresponding first sliding surfaces 23 are opposite.

Further, when the driving force receiving portion 1 receives the driving force, the first contact surface pushes the anti-stop member 6 to slide toward the second contact surface 22, so as to push the rotation of the driving force output portion 2; since the transmission directions of the adjacent two second contact surfaces 22 and the first sliding surface 23 are opposite, the driving force receiving portion 1 can realize forward and reverse rotation of the pushing driving force output portion 2 when receiving the driving force.

Still further, the transmission direction of the two adjacent shifting forks 121, the two adjacent second contact surfaces 22 and the first sliding surface 23 is opposite, so that the uniform stress of the driving force output part 2 during the forward and reverse rotation is ensured, and the driving force output part 2 can rotate uniformly.

Preferably, the backstop 10 further comprises: a fixing member 27; the positioning shaft 5 is sleeved at one end close to the inner sleeve 17 and used for fixing the driving force output part 2 and the driving force receiving part 1.

Preferably, the driving force output part 2 is provided with an inner sleeve mounting position 24, a positioning shaft hole 25 and a fixing piece mounting position 26; the inner sleeve mounting position 24 is arranged at one side close to the transmission connecting piece 14, the positioning shaft hole 25 is arranged at the middle part of the driving force output part 2, and the fixing piece mounting position 26 is arranged at one side of the driving force output part 2 far away from the transmission connecting piece 14.

Further, a fixing member 27 is connected with the fixing member mounting portion 26 in a fitting manner, and is used for fixing the driving force output portion 2 and the positioning shaft 5; the inner sleeve 17 and the inner sleeve mounting portion 24 are fitted to each other, and the positioning shaft 5 passes through the first shaft hole 141, the second shaft hole 171, and the positioning shaft hole 25 when the driving force output portion 1, the fixing member 27, and the driving force output portion 2 are connected.

Preferably, the fixing piece 27 is arranged, so that the positioning shaft 5 cannot move inside the backstop 10, the connection stability among various structures inside the backstop 10 is effectively enhanced, and the connection coaxiality is further ensured.

Preferably, referring to fig. 11, the backstop 10 further comprises: the backstop sleeve 3 is sleeved between the output part sleeve 15 and the backstop shell 8; the outer surface of the non-return sleeve 3 is provided with at least one third limiting position 31, and the non-return sleeve 3 is fixed on the inner wall of the non-return device shell 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.

Further, when the driving force output part 2 receives an external force, the first sliding surface 23 pushes the check member 6 to slide toward the second contact surface 22, and the check member 6 slides outward due to centrifugal motion due to the first sliding surface 23, so as to contact the inner wall of the check sleeve 3, but the check sleeve 3 is fixedly connected with the check housing 8, so that the rotation of the check member 6 is prevented, and the rotation of the driving force output part 2 can be prevented.

Still further, since the transmission directions of the two connected second contact surfaces 22 and the first sliding surfaces 23 connected thereto are opposite, and the transmission directions of the two adjacent anti-rotation members 6 are opposite, the second contact surfaces 22 and the first sliding surfaces 23 can effectively prevent the anti-rotation members 6 from sliding when the driving force output portion 2 receives torque, regardless of the forward and reverse rotation, thereby preventing the rotation of the driving force output portion 2 and achieving the anti-rotation effect.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (17)

1. A backstop, comprising:

the driving force receiving part is provided with a shifting block accommodating cavity, a shifting fork and an elastic part connected with the shifting fork, wherein a first contact surface is formed on one side, facing the shifting block accommodating cavity, of the shifting fork and the elastic part;

the driving force output part is arranged in the shifting block accommodating cavity and is provided with a second contact surface corresponding to the shifting fork and a first sliding surface connected with the second contact surface;

a backstop disposed between the first contact surface and the second contact surface;

the non-return sleeve is sleeved outside the non-return piece, and the inner wall of the sleeve is spaced from the non-return piece;

when the driving force receiving part rotates, the shifting fork pushes the non-return part to be tightly matched between the second contact surface and the first contact surface, so that the driving force output part is driven to rotate;

when the driving force output part receives torque, the reverse stop piece moves relative to the first sliding surface along the direction towards the inner wall and is tightly matched between the inner wall of the sleeve and the first sliding surface.

2. The backstop of claim 1,

the shifting forks are arranged in a plurality and are circumferentially distributed on the driving force receiving part; at least one of the plurality of shifting forks and the rest shifting forks have opposite transmission directions;

correspondingly, the second contact surface and the corresponding first sliding surface are respectively provided with a plurality of sliding surfaces which are circumferentially distributed on the driving force output part;

the transmission directions of two adjacent shifting forks are opposite, so that the transmission directions of two adjacent second contact surfaces and the corresponding first sliding surfaces are opposite correspondingly.

3. The backstop according to claim 2, wherein said drive force receiving portion comprises:

the shifting fork plate is provided with a plurality of shifting forks and a plurality of elastic pieces;

the output part sleeve is provided with the shifting block accommodating cavity, is connected to one side of the shifting fork plate facing the driving force output part and is positioned between the driving force output part and the non-return sleeve;

the output part sleeve is provided with a first opening at the position where the shifting fork and the elastic part are arranged on the shifting fork plate, and one side of the output part sleeve, which is far away from the shifting fork plate, of the first opening is provided with a non-return part limiting position corresponding to the first contact surface; the check member is clamped between the first contact surface and the second contact surface, contacts the check member limiting position and is exposed to the corresponding first opening.

4. The backstop according to claim 3, wherein said drive force receiving portion further comprises:

the transmission connecting piece is connected to one side, far away from the output part sleeve, of the shifting fork plate;

and the inner sleeve is arranged inside the output part sleeve and is connected to the transmission connecting piece.

5. The backstop of claim 4, wherein said drive connection is a spline.

6. The backstop according to claim 3, wherein said fork plate is open with at least one second opening into which said fork and the corresponding said elastic member extend.

7. The backstop according to claim 6, wherein said fork plate is provided with at least two first bosses; each first boss extends into two sides of the second opening and is provided with one shifting fork and one elastic piece connected with the shifting fork;

the transmission directions of the two shifting forks on the two sides of each first boss are opposite.

8. The backstop according to claim 6, wherein said second openings are at least two; two sides of each second opening are respectively provided with one shifting fork and one elastic piece connected with the shifting fork;

and the transmission directions of the two shifting forks on two sides of each second opening are opposite.

9. The backstop according to claim 8, wherein said first openings are provided in at least two and one said first opening corresponds to one said second opening.

10. The backstop of claim 4, wherein said drive force output is sleeved between said output sleeve and said inner sleeve; the driving force output part is provided with at least two second bosses; two second contact surfaces matched with the two first contact surfaces are formed on two sides of each second boss respectively, and each side of each second boss extends along the direction towards the adjacent boss to form the first sliding surface.

11. The backstop according to claim 10, wherein said drive force receiving portion, said backstop and said drive force output portion are coaxially arranged.

12. The backstop of claim 11, further comprising: positioning a shaft:

the driving force receiving part and the driving force output part are sleeved outside the positioning shaft;

the driving force receiving part is provided with a first shaft hole, and the first shaft hole is tightly matched with the positioning shaft;

the inner sleeve is provided with a second shaft hole, and the second shaft hole is in tight fit with the positioning shaft.

13. The backstop of claim 12, further comprising:

the fixing piece is sleeved on the positioning shaft, is close to one end of the inner sleeve and is used for fixing the driving force output part and the driving force receiving part.

14. An electric motor apparatus, comprising:

a motor body provided with a driving shaft;

a check according to any one of claims 1 to 13, wherein the driving force receiving portion of the check is connected to the drive shaft.

15. The electric machine arrangement of claim 14, further comprising:

and the speed reducer is connected between the motor body and the backstop.

16. A window covering control apparatus, comprising:

a drive being a motor device according to any one of claims 14 or 15;

a reel; the driver is arranged in the winding drum and can drive the winding drum to rotate.

17. A motorized window treatment, comprising:

a shade control device according to claim 16;

the shielding piece is arranged on the winding drum.

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