An electric roller shutter and an electric drive mechanism thereof

Abstract

The utility model discloses a kind of electric roller shutter and electric drive mechanism thereof, the electric drive mechanism includes tubular motor and coil spring assembly;Coil spring assembly includes motor connecting seat, winding pipe connecting seat and at least one coil spring module arranged between motor connecting seat and winding pipe connecting seat;The output shaft of tubular motor is connected with motor connecting seat.The electric drive mechanism of the utility model drives winding pipe to drive curtain cloth to be wound by coil spring assembly auxiliary tubular motor, to greatly reduce the torsional requirement to tubular motor, so that tubular motor can adopt small power motor, to effectively reduce cost and noise.

Description

Technical Field

[0001] This utility model relates to the field of electric roller blinds, and in particular to an electric roller blind and its electric drive mechanism. Background Technology

[0002] Electric roller blinds are now widely used for indoor sun shading or light blocking in various buildings. Existing electric roller blinds generally include a curtain fabric, a roller tube connected to the curtain fabric for controlling its rolling, a mounting base for mounting the roller tube, and a tubular motor for providing power; the tubular motor drives the roller tube to rotate, thereby controlling the unfolding and rewinding of the curtain fabric.

[0003] Existing electric roller blinds are generally driven by tubular motors that directly drive the roller tube. Such a structure requires the tubular motor to have sufficient torque to drive the curtain to roll up. Therefore, a larger power motor is usually selected. However, high-power motors are expensive and consume a lot of energy and are noisy when running.

[0004] In view of the above problems, it is necessary to study an electric roller shutter and its electric drive mechanism, which has low power requirements for the tubular motor. Utility Model Content

[0005] The purpose of this invention is to provide an electric roller blind and its electric drive mechanism, which has low power requirements for the tubular motor.

[0006] To achieve the above objectives, the solution of this utility model is:

[0007] An electric drive mechanism includes a tubular motor and a coil spring assembly. The coil spring assembly includes a motor connector, a coil tube connector, and at least one coil spring module disposed between the motor connector and the coil tube connector. Each coil spring module includes a coil spring housing, a coil spring shaft, and a coil spring disposed between the coil spring housing and the coil spring shaft. The coil spring housing rotatably houses the coil spring shaft, forming an annular cavity between them. The coil spring is housed within the annular cavity, and its two ends are respectively connected to the coil spring housing and the coil spring shaft. The motor connector has a rotatable connecting shaft, which is connected to the coil spring shaft of an adjacent coil spring module. The coil tube connector is connected to the coil spring shaft of an adjacent coil spring module. When the coil spring assembly has at least two coil spring modules, the coil spring shaft of one of two adjacent coil spring modules is connected to the coil spring shaft of the other coil spring module, and the coil spring housing of one of the two adjacent coil spring modules is connected to the coil spring housing of the other coil spring module. The output shaft of the tubular motor is connected to the connecting shaft of the motor connector.

[0008] The coil spring module has a coil spring shaft with a plug-in block and a plug-in slot at both ends. The connecting shaft of the motor connector is plugged into the plug-in slot of the coil spring shaft of the adjacent coil spring module and is circumferentially limited. The coil tube connector has a connecting slot, which is plugged into the plug-in block of the coil spring shaft of the adjacent coil spring module and is circumferentially limited. When the coil spring assembly has at least two coil spring modules, the plug-in block of the coil spring shaft of one of the two adjacent coil spring modules is plugged into the plug-in slot of the coil spring shaft of the other coil spring module and is circumferentially limited. The coil spring shell of one of the two adjacent coil spring modules is snapped into the coil spring shell of the other coil spring module.

[0009] The motor connector also has a motor connector base, and the connecting shaft is rotatably fitted to the motor connector base. The motor connector base is engaged with the spring housing of the spring module adjacent to the coil tube connector.

[0010] The coil spring housing has a snap-fit ​​interface and a snap-fit ​​ring at both ends. The inner wall of the snap-fit ​​interface has at least two snap-fit ​​grooves, and the outer wall of the snap-fit ​​ring has at least two snap-fit ​​blocks. When the coil spring housings of two adjacent coil spring modules are snapped together, the snap-fit ​​ring of one coil spring module's coil spring housing is inserted into the snap-fit ​​interface of the other coil spring module's coil spring housing, and each snap-fit ​​block of the snap-fit ​​ring is snapped into each snap-fit ​​groove of the snap-fit ​​interface. The motor connecting base is provided with a snap-fit ​​ring, and the outer wall of the snap-fit ​​ring is provided with multiple snap-fit ​​protrusions. When the motor connecting base is snapped together with the coil spring housing of the coil spring module adjacent to the coil tube connecting seat, the snap-fit ​​ring of the motor connecting base is inserted into the snap-fit ​​interface of the coil spring housing of the coil spring module adjacent to the coil tube connecting seat, and each snap-fit ​​protrusion of the snap-fit ​​ring is snapped into each snap-fit ​​groove of the snap-fit ​​interface.

[0011] Two retaining walls are formed at both ends of the coil spring housing. The coil spring shaft passes through the two retaining walls of the coil spring housing. One end of the coil spring shaft forms a retaining ring that is matched with the retaining wall. The other end of the coil spring shaft is inserted with a card that is matched with the retaining wall.

[0012] An electric roller blind includes a mounting base, a roller tube, a curtain fabric, and an electric drive mechanism as described above. The roller tube is rotatably connected to the mounting base, and the upper end of the curtain fabric is connected to the roller tube. The electric drive mechanism is fitted inside the roller tube. The motor body of the tubular motor and the spring housing of each spring module are circumferentially limited to the mounting base, and the roller tube connecting seat is circumferentially limited to the roller tube.

[0013] The motor connector also has a motor connector base. The connecting shaft of the motor connector is rotatably fitted to the motor connector base. The motor connector base is connected to the spring housing of the spring module adjacent to the coiled tube connector. The motor connector base and the motor body of the tubular motor are connected to the mounting base together through a connecting tube.

[0014] The tube is provided with a connecting strip along its axial direction, and the tube connecting seat is provided with a locking groove for inserting into the connecting strip.

[0015] The upper end of the curtain is provided with a connecting strip that is connected to the joint strip.

[0016] The lower end of the curtain is equipped with a counterweight strip.

[0017] By adopting the above solution, the electric drive mechanism of this utility model uses a coil spring assembly to assist the tubular motor in driving the winding tube to roll up the curtain, thereby greatly reducing the torque requirement of the tubular motor, enabling the tubular motor to use a low-power motor, thus effectively reducing cost and noise. Attached Figure Description

[0018] Figure 1 This is an exploded view of the structure of the electric roller shutter of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the electric roller shutter of this utility model.

[0020] Figure 3 This is a cross-sectional view of the coil spring assembly of this utility model.

[0021] Figure 4 Structural breakdown of the coil spring module of this utility model Figure 1 .

[0022] Figure 5 Structural breakdown of the coil spring module of this utility model Figure 2 .

[0023] Figure 6 This is a schematic diagram of the structure of the coil spring module of this utility model. Figure 1 .

[0024] Figure 7 This is a schematic diagram of the structure of the coil spring module of this utility model. Figure 2 .

[0025] Figure 8 This is a cross-sectional view of the coil spring module of this utility model.

[0026] Figure 9 This is a schematic diagram of the structure of the motor connector of this utility model. Figure 1 .

[0027] Figure 10 This is a schematic diagram of the structure of the motor connector of this utility model. Figure 2 .

[0028] Figure 11 This is a schematic diagram of the structure of the coiled tube connector of this utility model.

[0029] Figure 12This is a schematic diagram of the structure of the rolled tube of this utility model.

[0030] Label Explanation:

[0031] Mounting bracket A,

[0032] Tube B, Connecting strip B1,

[0033] Curtain fabric C, connecting strip C1, counterweight strip C2.

[0034] Electric drive mechanism D,

[0035] Tubular motor 1, motor body 11, output shaft 12,

[0036] Spring assembly 2,

[0037] Motor connector 21, motor connector base 211, snap ring 2111, snap protrusion 2112, connecting shaft 212.

[0038] Tube connector 22, connecting groove 221, locking groove 222,

[0039] Spring module 23, annular cavity 230,

[0040] Spring housing 231, retaining wall 2311, perforated hole 2312, snap-fit ​​interface 2313, snap-fit ​​groove 2314, snap-fit ​​ring 2315, snap-fit ​​block 2316.

[0041] Spring coil shaft 232, retaining ring 2321, connector block 2322, connector slot 2323.

[0042] Coil spring 233,

[0043] Card 234,

[0044] Connecting pipe E,

[0045] Matching seat F. Detailed Implementation

[0046] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0047] like Figures 1 to 12 As shown, this utility model discloses an electric roller blind, including a mounting base A, a roller tube B, a curtain C, and an electric drive mechanism D; wherein, the roller tube B is rotatably connected to the mounting base A, the upper end of the curtain C is connected to the roller tube B, and the electric drive mechanism D is fitted inside the roller tube B and is used to drive the roller tube B to rotate.

[0048] In an embodiment of this utility model, the electric drive mechanism D includes a tubular motor 1 and a coil spring assembly 2; wherein, the coil spring assembly 2 includes a motor connecting seat 21, a coil tube connecting seat 22, and at least one coil spring module 23 disposed between the motor connecting seat 21 and the coil tube connecting seat 22; the coil spring module 23 includes a coil spring housing 231, a coil spring shaft 232, and a coil spring 233 disposed between the coil spring housing 231 and the coil spring shaft 232, the coil spring housing 231 rotatably sleeves the coil spring shaft 232 and the two form an annular cavity 230, the coil spring 233 is accommodated in the annular cavity 230 and both ends of the coil spring 233 are respectively connected to the coil spring housing 231 and the coil spring shaft 232; the motor connecting seat 21 has a rotatable connecting shaft 212, and the connecting shaft 212 of the motor connecting seat 21 is adjacent to the coil spring shaft 23 of the coil spring module 23. 2. Connected; the coil tube connecting seat 22 is connected to the coil spring shaft 232 of the adjacent coil spring module 23; when the coil spring assembly 2 has at least two coil spring modules 23, the coil spring shaft 232 of one of the two adjacent coil spring modules 23 is connected to the coil spring shaft 232 of the other coil spring module 23, and the coil spring housing 231 of one of the two adjacent coil spring modules 23 is connected to the coil spring housing 231 of the other coil spring module 23; the output shaft 12 of the tubular motor 1 is connected to the connecting shaft 212 of the motor connecting seat 21, the output shaft 12 of the tubular motor 1 and the connecting shaft 212 of the motor connecting seat 21 can be plugged in and circumferentially limited, the motor body 11 of the tubular motor 1 and the coil spring housing 231 of each coil spring module 23 are circumferentially limited to the mounting seat A, and the coil tube connecting seat 22 is circumferentially limited to the coil tube B.

[0049] The working principle of this electric roller shutter is as follows:

[0050] When the curtain C is to be unfolded, the output shaft 12 of the tubular motor 1 rotates forward. At this time, the coil spring assembly 2 will unlock, causing the curtain C to unfold under the action of gravity. The unfolding of the curtain C causes the roller tube B to rotate forward, which in turn drives the coil spring shafts 232 of each coil spring module 23 of the coil spring assembly 2 to rotate forward, thereby allowing the coil springs 233 of each coil spring module 23 of the coil spring assembly 2 to store energy.

[0051] When the curtain fabric C is to be rolled up, the output shaft 12 of the tubular motor 1 reverses. At this time, the coil springs 233 of each coil spring module 23 of the coil spring assembly 2 release energy, causing the rotating shaft of the coil spring assembly 2 to reverse with high torque under the action of the coil springs 233 and the tubular motor 1, thereby driving the winding tube B to reverse, so that the curtain fabric C is rolled up onto the winding tube B.

[0052] As described above, the electric drive mechanism D of this invention uses the coil spring assembly 2 to assist the tubular motor 1 in driving the winding tube B to wind up the curtain fabric C, thereby greatly reducing the torque requirement of the tubular motor 1. This allows the tubular motor 1 to use a low-power motor, effectively reducing cost and noise. Furthermore, the number of coil spring modules 23 in the coil spring assembly 2 can be flexibly selected according to the different specifications of the curtain fabric C; the larger and heavier the curtain fabric C, the more coil spring modules 23 the coil spring assembly 2 should have.

[0053] In an embodiment of this utility model, two retaining walls 2311 are formed at both ends of the coil spring housing 231. The coil spring shaft 232 passes through the two retaining walls 2311 of the coil spring housing 231. One end of the coil spring shaft 232 forms a retaining ring 2321 that is limited and matched with the retaining wall 2311, and the other end of the coil spring shaft 232 is inserted and matched with a card 234 that is limited and matched with the retaining wall 2311. In this way, the retaining ring 2321 and the card 234 can prevent the coil spring shaft 232 from detaching from the coil spring housing 231. The coil spring housing 231 may be provided with a hollow hole 2312 to reduce weight.

[0054] In this embodiment of the utility model, the coil spring module 23 has a coil spring shaft 232 with plug-in blocks 2322 and plug-in slots 2323 at both ends; the connecting shaft 212 of the motor connector 21 is plugged into and circumferentially limited to the plug-in slots 2323 of the coil spring shaft 232 of the adjacent coil spring module 23; the coil tube connector 22 has a connecting groove 221, and the connecting groove 221 of the coil tube connector 22 is plugged into and circumferentially limited to the plug-in blocks 2322 of the coil spring shaft 232 of the adjacent coil spring module 23; when the coil spring assembly 2 When there are at least two coil spring modules 23, the insertion block 2322 of the coil spring shaft 232 of one of the two adjacent coil spring modules 23 is inserted and engaged with the insertion slot 2323 of the coil spring shaft 232 of the other coil spring module 23, and the circumferential limiting engagement is also achieved. The coil spring housing 231 of one of the two adjacent coil spring modules 23 is snapped into place with the coil spring housing 231 of the other coil spring module 23. This arrangement facilitates the assembly of the motor connector 21, the coil tube connector 22 and the coil spring module 23 of the coil spring assembly 2, thereby improving production efficiency. The coil spring housing 231 has a snap-fit ​​interface 2313 and a snap-fit ​​ring 2315 at its two ends, respectively. The inner wall of the snap-fit ​​interface 2313 has at least two snap-fit ​​grooves 2314, and the outer wall of the snap-fit ​​ring 2315 has at least two snap-fit ​​blocks 2316. When the coil spring housings 231 of two adjacent coil spring modules 23 are snapped together, the snap-fit ​​ring 2315 of the coil spring housing 231 of one coil spring module 23 is inserted into the snap-fit ​​interface 2313 of the coil spring housing 231 of the other coil spring module 23, and each snap-fit ​​block 2316 of the snap-fit ​​ring 2315 snaps into each snap-fit ​​groove 2314 of the snap-fit ​​interface 2313.

[0055] In an embodiment of this utility model, the motor connecting seat 21 further includes a motor connecting base 211. The connecting shaft 212 of the motor connecting seat 21 is rotatably fitted to the motor connecting base 211. The motor connecting base 211 is connected to the spring housing 231 of the spring module 23 adjacent to the coiled tube connecting seat 22. The motor connecting base 211 and the motor body 11 of the tubular motor 1 are connected to the mounting seat A through the connecting pipe E, thereby enabling the motor body 11 of the tubular motor 1 and the spring housing 231 of each spring module 23 to be circumferentially limited and fitted with the mounting seat A. The motor connecting base 211 and the spring housing 231 of the spring module 23 adjacent to the coil tube connecting seat 22 can be snapped together, making it easy to connect the two. Specifically, the motor connecting base 211 is provided with a snap ring 2111, and the outer wall of the snap ring 2111 is provided with multiple snap protrusions 2112. When the motor connecting base 211 and the spring housing 231 of the spring module 23 adjacent to the coil tube connecting seat 22 are snapped together, the snap ring 2111 of the motor connecting base 211 is inserted into the snap interface 2313 of the spring housing 231 of the spring module 23 adjacent to the coil tube connecting seat 22, and each snap protrusion 2112 of the snap ring 2111 snaps into each snap groove 2314 of the snap interface 2313.

[0056] In an embodiment of this utility model, the roller tube B is provided with a connecting strip B1 along its axial direction, and the roller tube connecting seat 22 is provided with a locking groove 222 that is inserted into the connecting strip B1 so that the roller tube connecting seat 22 and the roller tube B are circumferentially limited and matched; while the upper end of the curtain C may be provided with a connecting strip C1 connected to the connecting strip B1, and the connecting strip C1 and the connecting strip can be slidably matched, so that the curtain C is easy to disassemble and clean.

[0057] In an embodiment of this utility model, a counterweight C2 may be provided at the lower end of the curtain C. When the curtain C is unfolded, the counterweight C2 can assist the curtain C to unfold quickly as a whole; at the same time, the counterweight C2 can also prevent the curtain C from being blown up excessively by the wind.

[0058] In an embodiment of this utility model, the electric roller shutter of this utility model also includes a mating seat F, and the two ends of the roller tube B are respectively rotatably connected to the mating seat F and the mounting seat A; this arrangement can improve the overall stability.

[0059] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. An electric drive mechanism, characterized by: Includes tubular motors and coil spring assemblies; The coil spring assembly includes a motor connector, a coil tube connector, and at least one coil spring module disposed between the motor connector and the coil tube connector. Each coil spring module includes a coil spring housing, a coil spring shaft, and a coil spring disposed between the coil spring housing and the coil spring shaft. The coil spring housing rotatably houses the coil spring shaft, forming an annular cavity between them. The coil spring is housed within the annular cavity, and its two ends are respectively connected to the coil spring housing and the coil spring shaft. The motor connector has a rotatable connecting shaft, which is connected to the coil spring shaft of the adjacent coil spring module. The coil tube connector is connected to the coil spring shaft of the adjacent coil spring module. When the coil spring assembly has at least two coil spring modules, the coil spring shaft of one of the two adjacent coil spring modules is connected to the coil spring shaft of the other coil spring module, and the coil spring housing of one of the two adjacent coil spring modules is connected to the coil spring housing of the other coil spring module. The output shaft of the tubular motor is connected to the connecting shaft of the motor connector.

2. The motorized drive mechanism of claim 1, wherein: The coil spring module has a spring shaft with a plug-in block and a plug-in slot at both ends; The connecting shaft of the motor connector engages with the insertion slot of the spring shaft of the adjacent spring module and is circumferentially limited; the coil tube connector has a connecting slot, which engages with the insertion block of the spring shaft of the adjacent spring module and is circumferentially limited; when the spring assembly has at least two spring modules, the insertion block of the spring shaft of one of the two adjacent spring modules engages with the insertion slot of the spring shaft of the other spring module and is circumferentially limited, and the spring housing of one of the two adjacent spring modules engages with the spring housing of the other spring module.

3. The motorized drive mechanism of claim 2, wherein: The motor connector also has a motor connector base, and the connecting shaft is rotatably fitted to the motor connector base. The motor connector base is engaged with the spring housing of the spring module adjacent to the coil tube connector.

4. The motorized drive mechanism of claim 3, wherein: The coil spring housing has a snap-in interface and a snap-in ring formed at both ends, the inner wall of the snap-in interface has at least two snap-in grooves, and the outer wall of the snap-in ring has at least two snap-in blocks. When the coil spring housings of two adjacent coil spring modules are engaged, the snap ring of the coil spring housing of one coil spring module is inserted into the snap interface of the coil spring housing of the other coil spring module, and each snap block of the snap ring engages with each snap slot of the snap interface. The motor connecting base is provided with a snap ring, and the outer wall of the snap ring is provided with multiple snap protrusions. When the motor connecting base is snapped into the spring shell of the spring module adjacent to the coil tube connecting seat, the snap ring of the motor connecting base is inserted into the snap interface of the spring shell of the spring module adjacent to the coil tube connecting seat, and each snap protrusion of the snap ring is snapped into each snap groove of the snap interface.

5. The motorized drive mechanism of claim 1, wherein: Two retaining walls are formed at both ends of the coil spring housing. The coil spring shaft passes through the two retaining walls of the coil spring housing. One end of the coil spring shaft forms a retaining ring that is matched with the retaining wall. The other end of the coil spring shaft is inserted with a card that is matched with the retaining wall.

6. An electric roller blind comprising a mounting, a roller tube and a blind cloth, the roller tube being pivotally connected to the mounting, the upper end of the blind cloth being connected to the roller tube, characterized in that: It also includes the electric drive mechanism as described in claim 1; The electric drive mechanism is fitted inside the coil tube. The motor body of the tubular motor and the coil spring shell of each coil spring module are circumferentially limited to the mounting base, and the coil tube connecting base is circumferentially limited to the coil tube.

7. The motorized roller shade of claim 6, wherein: The motor connector also has a motor connector base. The connecting shaft of the motor connector is rotatably fitted to the motor connector base. The motor connector base is connected to the spring housing of the spring module adjacent to the coiled tube connector. The motor connector base and the motor body of the tubular motor are connected to the mounting base together through a connecting tube.

8. The motorized roller shade of claim 7, wherein: The tube is provided with a connecting strip along its axial direction, and the tube connecting seat is provided with a locking groove for inserting into the connecting strip.

9. The motorized roller shade of claim 8, wherein: The upper end of the curtain is provided with a connecting strip that is connected to the joint strip.

10. The motorized roller shade of claim 6, wherein: The lower end of the curtain is equipped with a counterweight strip.

Images