Electric driving mechanism of sunshade curtain

Abstract

The invention relates to an electric driving mechanism of a sunshade curtain, the electric driving mechanism is used for the sunshade curtain of a motor vehicle and can be controlled to drive the curtain cloth of the sunshade curtain to unfold and fold, the electric driving mechanism comprises a transmission strip and a driving assembly, and the transmission strip is movably arranged on a machine shell of the driving assembly in a penetrating mode. According to the driving assembly, a driving wheel driven by a motor provides pushing force or pulling force for a transmission strip, a driven wheel pivoted to a machine shell and the driving wheel are oppositely arranged on the two opposite sides of the transmission strip, and the driven wheel is located on the other opposite side of the transmission strip to provide auxiliary abutting force. Therefore, the driving force applied to the transmission strip by the driving wheel driven by the motor can effectively and directly act on the transmission strip, and the driven wheel can be matched with the driving wheel to relatively clamp and drive the transmission strip to rotate, so that the transmission strip can be driven more directly and effectively, and the driving performance of the electric driving mechanism for driving the curtain cloth to unfold and fold is improved.

Description

Technical Field

[0001] This invention relates to a sunshade curtain, and more particularly to an electric drive mechanism in the sunshade curtain that can drive the curtain fabric to open and close. Background Technology

[0002] The current structure of an electric sunshade used on vehicle windows includes a curtain roll-up assembly, a curtain, a guide rail mechanism, and an electric drive mechanism. The curtain roll-up assembly is installed on the front side of the window. The curtain is connected to the curtain roll-up assembly, allowing the curtain to be automatically rolled up by the assembly and pulled out to unfold. The guide rail mechanism is horizontally positioned below the window and has a rocker arm that can move laterally along the guide rail. The upper end of the rocker arm is connected to a movable side plate of the curtain. The electric drive mechanism has a transmission bar that extends into the guide rail and is connected to the bottom end of the rocker arm. A motor-driven drive wheel drives the transmission bar, providing thrust or pull to the transmission bar, which in turn drives the rocker arm to unfold or retract the curtain.

[0003] The existing electric drive mechanism in the aforementioned sunshade curtains can utilize a motor-driven drive wheel to drive a transmission bar, which in turn provides thrust or pull to drive a rocker arm to open or close the curtain. However, in the existing electric drive mechanism, the rotational force of the motor-driven drive wheel pushing against the transmission bar is biased to one side of the transmission bar. This makes it difficult for the rotational driving force of the drive wheel to effectively act on the transmission bar, and even causes slippage between the drive wheel and the transmission bar. This results in uneven driving force acting on the transmission bar, making it impossible to smoothly drive the transmission bar to open and close the curtain. Based on the requirement to improve the quality of electric sunshade curtains, it is necessary to further improve the aforementioned technical problems of the electric drive mechanism. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an electric drive mechanism for a sunshade curtain, which solves the technical problem in the existing electric drive mechanism of electric sunshade curtains, where the rotational force of the motor-driven drive wheel pushing against the transmission bar is biased to one side of the transmission bar, and the rotational driving force is difficult to effectively act on the transmission bar, resulting in uneven driving force acting on the transmission bar and the inability to smoothly drive the transmission bar to open and close the curtain.

[0005] The technical solution proposed in this invention is: to provide an electric drive mechanism for a sunshade curtain, which is used for a sunshade curtain of a motor vehicle and can controllably drive the curtain fabric to unfold and retract, wherein: the electric drive mechanism includes a transmission bar and a drive assembly, the transmission bar can drive the curtain fabric, the drive assembly includes a housing, a drive wheel, a driven wheel and a motor, wherein the housing provides a transmission bar movement path, the transmission bar is movably disposed on the transmission bar movement path; the drive wheel and the driven wheel are respectively pivotally mounted on the housing and located on opposite sides of the transmission bar movement path, and are in frictional contact with the transmission bar disposed on the transmission bar movement path; the motor is disposed on the housing and can provide rotational power to the drive wheel.

[0006] In the electric drive mechanism of the sunshade curtain as described above, the electric drive mechanism further includes a transmission gear set, which includes a first transmission gear and a second transmission gear. The first transmission gear is coaxially connected to the driving wheel, and the second transmission gear is coaxially connected to the driven wheel and meshes with the first transmission gear. The motor can drive the driving wheel to rotate and synchronously drive the driven wheel through the transmission gear set.

[0007] In the electric drive mechanism of the sunshade curtain as described above, the electric drive mechanism further includes a torque storage unit connected to the driven wheel. The torque storage unit can provide auxiliary force for forward or reverse rotation of the driven wheel and provide auxiliary thrust or pull force to the transmission bar.

[0008] In the electric drive mechanism of the sunshade curtain as described above, the torque storage unit includes a base, a connecting rod, and a torsion spring. The base is disposed on the housing and has a receiving chamber. The connecting rod is pivotally disposed in the receiving chamber of the base and is coaxially connected to the driven wheel. The torsion spring is disposed in the receiving chamber of the base and is connected between the base and the connecting rod. The torsional elastic force pre-stored in the torsion spring acts on the driven wheel.

[0009] In the electric drive mechanism of the sunshade curtain as described above, the electric drive mechanism further includes an auxiliary torque supply component. The auxiliary torque supply component includes an auxiliary drive wheel and a torque energy storage unit. The auxiliary drive wheel is pivotally mounted on the housing and is located on the same side of the transmission bar's movement path as the driven wheel. The auxiliary drive wheel is in frictional contact with the transmission bar. The torque energy storage unit is connected to the auxiliary drive wheel and can provide rotational force to the auxiliary drive wheel, and provide auxiliary thrust or pull force to the transmission bar through the auxiliary drive wheel.

[0010] In the electric drive mechanism of the sunshade curtain described above, the torque energy storage unit includes a base, a shaft, and a torsion spring. The base is mounted on the housing and has an accommodating space. The base is coaxially connected to the auxiliary drive wheel and can rotate together. The shaft is pivotally mounted in the accommodating space of the base and fixed to the housing. The torsion spring is located in the accommodating space of the base and connected between the base and the shaft. The torsion spring can act on the auxiliary drive wheel with a pre-stored torsional elastic force, and provide auxiliary thrust or pull force to the transmission bar through the auxiliary drive wheel.

[0011] In the electric drive mechanism of the sunshade curtain described above, the torque energy storage unit includes a base, a shaft, and a torsion spring. The base is fixed to the housing and has an accommodating space. The shaft is pivotally mounted in the accommodating space of the base and is coaxially connected to the auxiliary drive wheel and can rotate together. The torsion spring is located in the accommodating space of the base and is connected between the base and the shaft. The torsion spring can act on the auxiliary drive wheel with a pre-stored torsional elastic force, and provide auxiliary thrust or pull force to the transmission bar through the auxiliary drive wheel.

[0012] In the electric drive mechanism of the sunshade curtain as described above, a channel matching the transmission bar is formed in the housing. The transmission bar is movably inserted in the channel and the channel serves as the movement path of the transmission bar. On opposite sides of the channel, a drive wheel chamber and a driven wheel chamber are formed respectively, which are connected to the channel. The drive wheel and the driven wheel are pivotally mounted in the drive wheel chamber and the driven wheel chamber respectively.

[0013] The beneficial effects achieved by this invention are as follows: When the electric drive mechanism is applied to the sunshade of a motor vehicle window, based on the push or pull force provided by the motor-driven drive wheel to the transmission bar, the driven wheel, pivotally mounted on the housing, is arranged opposite to the drive wheel on opposite sides of the transmission bar. The driven wheel, located on the opposite side of the transmission bar, provides auxiliary resistance, so that the driving force applied by the motor-driven drive wheel to the transmission bar can be effectively and directly applied to the transmission bar. Furthermore, the driven wheel can rotate when it is clamped and driven by the drive wheel, making the transmission bar more directly and effectively driven, and maintaining the force acting on the transmission bar in a balanced state, thereby improving the driving performance of the electric drive mechanism in opening and closing the curtain.

[0014] In the electric drive mechanism of the sunshade curtain of the present invention, a transmission gear set is further used to connect the driving wheel and the driven wheel. When the motor drives the driving wheel to rotate, the driven wheel is driven synchronously through the transmission gear set, so that the driven wheel can obtain part of the driving force of the motor and act on the transmission bar, providing a stable driving force to the transmission bar.

[0015] In the electric drive mechanism of the sunshade curtain of the present invention, a torque storage unit is further connected to the driven wheel. The torque stored in the torque storage unit provides auxiliary force for forward or reverse rotation through the driven wheel, thereby providing auxiliary push or pull force to the transmission bar. When the motor-driven drive wheel drives the transmission bar, the torque storage unit provides auxiliary force to the transmission bar through the driven wheel, which helps drive the transmission bar, reduces the load on the motor, and makes the current value of the motor driving the drive wheel tend to be balanced, thereby extending the service life of the motor.

[0016] In the electric drive mechanism of the sunshade curtain of the present invention, an auxiliary torque supply component can be further provided on the housing. The auxiliary torque supply component includes an auxiliary drive wheel and a torque energy storage unit connected to the auxiliary drive wheel. By utilizing the fact that the auxiliary drive wheel and the driven wheel are located on the same side of the transmission bar's movement path, the auxiliary drive wheel and the transmission bar are in frictional contact. The torque stored in the torque energy storage unit can provide rotational force to the auxiliary drive wheel, and provide auxiliary push or pull force to the transmission bar through the auxiliary drive wheel, which helps drive the transmission bar and reduces the load on the motor, so that the current value of the motor driving the drive wheel tends to be balanced, thereby extending the service life of the motor.

[0017] In the electric drive mechanism of the sunshade curtain of the present invention, a channel matching the transmission bar is formed in the housing, and a drive wheel chamber and a driven wheel chamber communicating with the channel are formed on opposite sides of the channel. The transmission bar is movably inserted in the channel, which serves as the movement path of the transmission bar. The drive wheel and the driven wheel are pivotally mounted in the drive wheel chamber and the driven wheel chamber, respectively, and clamp the transmission bar relative to each other. This improves the smoothness of the drive assembly driving the transmission bar by combining the drive wheel driven by the motor with the driven wheel to clamp the transmission bar relative to each other, while the channel of the housing assists in the linear guidance and limiting of the transmission bar. Attached Figure Description

[0018] Figure 1 This is a plan view of the first embodiment of the electric drive mechanism of the present invention applied to an electric sunshade curtain, with the curtain in a closed state.

[0019] Figure 2 This is a plan view of the first embodiment of the electric drive mechanism of the present invention applied to an electric sunshade curtain, with the curtain in an unfolded state.

[0020] Figure 3 yes Figure 1 and Figure 2 A perspective view of the first embodiment of the electric drive mechanism shown.

[0021] Figure 4 yes Figure 3 A partially exploded view of the first embodiment of the electric drive mechanism shown.

[0022] Figure 5 This is a perspective view of the second embodiment of the electric drive mechanism of the present invention.

[0023] Figure 6 yes Figure 5 A partially exploded view of the second embodiment of the electric drive mechanism shown.

[0024] Figure 7 This is a perspective view of the third embodiment of the electric drive mechanism of the present invention.

[0025] Figure 8 yes Figure 7 A partially exploded view of the third embodiment of the electric drive mechanism shown.

[0026] Figure 9 This is a perspective view of the fourth embodiment of the electric drive mechanism of the present invention.

[0027] Figure 10 yes Figure 9 A partially exploded view of the fourth embodiment of the electric drive mechanism shown.

[0028] Figure 11 This is a perspective view of the fifth embodiment of the electric drive mechanism of the present invention.

[0029] Figure 12 yes Figure 11 A partially exploded view of the fifth embodiment of the electric drive mechanism shown.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1: Curtain roll retractor assembly

[0032] 2: Curtain

[0033] 3: Curtain edge panel

[0034] 4: Guidance mechanism

[0035] 4A: Guide rail

[0036] 4B: Rocker arm

[0037] 10: Electric drive mechanism

[0038] 11: Transmission bar

[0039] 12: Driver Components

[0040] 120: Chassis

[0041] 1201: Channel

[0042] 1202: Active wheel chamber

[0043] 1203: Driven wheel chamber

[0044] 121: Drive wheel

[0045] 122: Driven wheel

[0046] 123: Motor

[0047] 13: Transmission gear set

[0048] 131: First transmission gear

[0049] 132: Second transmission gear

[0050] 14: Torque storage unit

[0051] 141: Base

[0052] 1410: Storage Room

[0053] 142: Linkage

[0054] 143: Torsion Spring

[0055] 15: Auxiliary Torque Supply Component

[0056] 151: Auxiliary drive wheel

[0057] 152: Torque Storage Unit

[0058] 1521: base body

[0059] 1522: Storage space

[0060] 1523: Shaft

[0061] 1524: Torsion spring. Detailed Implementation

[0062] The following description, in conjunction with the accompanying drawings and embodiments of the present invention, further illustrates the technical means employed by the present invention to achieve its intended purpose.

[0063] like Figure 1 and Figure 2 As shown, the electric drive mechanism 10 of the present invention is used in an electric sunshade for a vehicle window. Basically, the electric sunshade includes a curtain roll-up assembly 1, a curtain 2, and an electric drive mechanism 10. The curtain roll-up assembly 1 is mounted on one side of the window, and one side of the curtain 2 is connected to the curtain roll-up assembly 1, allowing the curtain to be automatically rolled up by the curtain roll-up assembly 1. The curtain can also be pulled out and unfolded from the curtain roll-up assembly 1. The other side of the curtain 2 extending outside the curtain roll-up assembly 1 has a curtain edge panel 3. The electric drive mechanism 10 is installed inside the vehicle, and the electric drive mechanism 10 can controllably drive the curtain edge panel 3 to move, causing the curtain 2 to unfold and close.

[0064] by Figure 1 and Figure 2 Taking the illustrated electric sunshade embodiment as an example, the electric drive mechanism 10 is connected to the curtain edge plate 3 in conjunction with the guide mechanism 4. The guide mechanism 4 includes a guide rail 4A and a rocker arm 4B. The guide rail 4A is horizontally positioned below the window of the vehicle window. The upper end of the rocker arm 4B is pivotally connected to the curtain edge plate 3, and the lower end of the rocker arm 4B has a slider. The slider is located within the guide rail 4A and can move along the guide rail 4A. The electric drive mechanism 10 extends into the guide rail 4A and connects to the slider at the bottom of the rocker arm 4B. The electric drive mechanism 10 can controllably drive the slider to move along the guide rail 4A, and through the rocker arm 4B on the slider, it drives the curtain 2 to be pulled out from the curtain roll-up assembly 1 to unfold or retract into the curtain roll-up assembly 1. The guide mechanism 4 is an existing product, and its specific structure will not be described in detail. The above is one embodiment in which the electric drive mechanism 10 is connected and can drive the curtain 2 to unfold and retract, and is not limited thereto.

[0065] like Figure 3 , Figure 5 , Figure 7 , Figure 9 and Figure 11 As shown in the figures, several embodiments of the electric drive mechanism 10 of the sunshade of the present invention are disclosed. As can be seen from the figures, the electric drive mechanism 10 includes a transmission bar 11 and a drive assembly 12. The following describes various embodiments of the electric drive mechanism 10 of the present invention.

[0066] like Figure 3 and Figure 4 In the first embodiment shown, the transmission bar 11 is a flexible long strip component that can be bent and recover. One end of the transmission bar 11 is connected to the slider at the bottom of the rocker arm 4B, so as to drive the slider to move along the guide rail 4A, thereby driving the curtain side plate 3 to move, so that the curtain 2 can be unfolded and closed.

[0067] like Figure 3 and Figure 4 As shown, the drive assembly 12 includes a housing 120, a drive wheel 121, a driven wheel 122, and a motor 123. Wherein:

[0068] like Figure 3 and Figure 4 As shown, the housing 120 provides a drive bar movement path 1200, and the drive bar 11 is disposed in the drive bar movement path 1200 and is movable. In this embodiment, a channel 1201 is formed in the housing 120, the diameter of the channel 1201 matches the diameter of the drive bar 11, the drive bar 11 passes through the channel 1201 and is movable in the channel 1201, with the channel 1201 serving as the drive bar movement path. Figure 3 and Figure 4In the embodiment shown, the housing 120 forms a drive wheel chamber 1202 and a driven wheel chamber 1203 on opposite sides of the channel 1201, respectively, which are connected to the channel 1201.

[0069] like Figure 3 and Figure 4 As shown, the driving wheel 121 and the driven wheel 122 are respectively pivotally mounted on opposite sides of the transmission bar movement path 1200 of the housing 120, and are in frictional contact with the transmission bar 11 provided on the transmission bar movement path 1200, so that the driving wheel 121 and the driven wheel 122 can clamp and drive the transmission bar 11.

[0070] In this embodiment, the driving wheel 121 and the driven wheel 122 are pivotally mounted on opposite sides of the channel 1201 and are in frictional contact with the transmission bar 11 disposed in the channel 1201. Both the driving wheel 121 and the driven wheel 122 are gear-shaped. The driving wheel 121 and the driven wheel 122 are pivotally mounted in the driving wheel chamber 1202 and the driven wheel chamber 1203, respectively, and extend into the channel 1201, tightly abutting against and clamping the transmission bar 11.

[0071] like Figure 3 and Figure 4 As shown, the motor 123 is mounted on the housing 120 and directly or indirectly connected to the drive wheel 121 to provide rotational power to the drive wheel 121. When the motor 123 is indirectly connected to the drive wheel 121, the motor 123 and the drive wheel 121 can be connected and transmitted through a gear train or other gear transmission components such as a worm gear and worm combination or a gear set. The connection method and transmission method between the motor 123 and the drive wheel 121 are existing technologies and will not be described in detail here.

[0072] By means of the above Figure 3 and Figure 4 In the embodiment shown, when the electric drive mechanism 10 drives the transmission bar 11 to move the curtain side plate 3, the drive wheel 121 driven by the motor 123, together with the driven wheel 122, clamps the transmission bar 11. While the drive wheel 121 provides a pushing or pulling force on one side of the transmission bar 11, the driven wheel 122 provides an auxiliary resisting force on the opposite side of the transmission bar 11, ensuring that the rotational force output by the drive wheel 121 can directly and effectively act on the transmission bar 11, so that the transmission bar 11 can be driven smoothly, and the curtain 2 can be smoothly moved to unfold and close.

[0073] like Figure 5 and Figure 6The second embodiment shown further adds a transmission gear set 13 based on the composition of the first embodiment. The transmission gear set 13 includes a first transmission gear 131 and a second transmission gear 132. The first transmission gear 131 is coaxially connected to the driving wheel 121, and the second transmission gear 132 is coaxially connected to the driven wheel 122 and meshes with the first transmission gear 131. Thus, when the motor 123 drives the driving wheel 121 to rotate, it synchronously drives the driven wheel 122 through the transmission gear set 13, so that the driving wheel 121 and the driven wheel 122 can clamp and drive the transmission bar 11.

[0074] like Figure 7 and Figure 8 The third embodiment shown further adds a torque storage unit 14 to the composition of the first embodiment. The torque storage unit 14 is connected to the driven wheel 122. The torque storage unit 14 can provide auxiliary force for the driven wheel 122 to rotate in the forward or reverse direction, so as to provide auxiliary pushing or pulling force to the transmission bar 11. In this way, when the curtain 2 of the sunshade is opened or closed, appropriate torque is provided so that the current value of the motor 123 driving the drive wheel 121 tends to be balanced, thereby extending the service life of the motor 123.

[0075] At Figure 7 and Figure 8 In the third embodiment shown, the torque storage unit 14 includes a base 141, a connecting rod 142, and a torsion spring 143. The base 141 is disposed on the housing 120 and has a receiving chamber 1410. The connecting rod 142 is pivotally disposed in the receiving chamber 1410 of the base 141, and the connecting rod 142 is coaxially connected to the driven wheel 122. Alternatively, the connecting rod 142 and the spindle of the driven wheel 122 are integrally formed. The torsion spring 143 is disposed in the receiving chamber 1410 of the base 141 and connects the base 141 and the connecting rod 142. The torsional elastic force pre-stored in the torsion spring 143 acts on the driven wheel 122, providing auxiliary thrust or pull when the driven wheel 122 drives the transmission bar 11. The base 141 may be integrally formed with the housing 120, or the base 141 may be a separate component and fixed to the housing 120 by adhesive or fastening.

[0076] like Figure 9 and Figure 10The fourth embodiment shown is based on the structure of the first embodiment described above, with the addition of an auxiliary torque supply component 15. This auxiliary torque supply component 15 includes an auxiliary drive wheel 151 and a torque storage unit 152. The auxiliary drive wheel 151 is pivotally mounted on the housing 120 and located on the same side of the transmission bar movement path 1200 as the driven wheel 122. The auxiliary drive wheel 151 is in frictional contact with the transmission bar 11 located on the transmission bar movement path 1200. The torque storage unit 151… 2. The auxiliary drive wheel 151 is connected to the torque energy storage unit 152, which can provide forward or reverse rotational force to the auxiliary drive wheel 151 and provide auxiliary push or pull force to the transmission bar 11 through the auxiliary drive wheel 151. In this way, when the curtain 2 of the sunshade is opened or closed, the active wheel 121 and the driven wheel 122 that clamp the drive transmission bar 11 provide appropriate auxiliary rotational force, so that the current value of the motor 123 driving the active wheel 121 tends to be balanced, thereby extending the service life of the motor 123.

[0077] At Figure 9 and Figure 10 In the fourth embodiment shown, the torque energy storage unit 152 includes a base 1521, a shaft 1523, and a torsion spring 1524. The base 1521 is located on the housing 120 and has an accommodating space 1522. The shaft 1523 is pivotally mounted in the accommodating space 1522 of the base 1521. The auxiliary drive wheel 151 is coaxially connected to the base 1521, and the shaft 1523 is fixed to the housing 120, so that... The seat 1521 and the auxiliary drive wheel 151 rotate together. The torsion spring 1524 is located in the accommodating space 1522 of the seat 1521 and is connected between the seat 1521 and the shaft 1523. The torsion spring 1524, which is pre-stored in the torsional elastic force, drives the auxiliary drive wheel 151 to rotate through the seat 1521 or the shaft 1523, so that the auxiliary drive wheel 151 can provide auxiliary thrust or pull force to the transmission bar 11.

[0078] In addition, the torque energy storage unit 152 can also be modified so that the base 1521 is fixed on the housing 120. The base 1521 can be integrally formed with the housing 120, or the base 1521 can be an independent component and fixed on the housing 120 by adhesive or fixing structure. The shaft 1523 is pivotally mounted in the accommodating space 1522 of the base 1521, and the shaft 1523 and the auxiliary drive wheel 151 are coaxially connected or integrally formed, so that the shaft 1523 and the auxiliary drive wheel 151 rotate together.

[0079] like Figure 11 and Figure 12The fifth embodiment shown is based on the composition of the second embodiment, which includes a transmission gear set 13, and further adds an auxiliary torque supply component 15. The composition of the auxiliary torque supply component 15, the connection relationship between the auxiliary torque supply component 15 and the transmission bar 11 are the same as those in the fourth embodiment. That is, the auxiliary torque supply component 15 also includes an auxiliary drive wheel 151 and a torque energy storage unit 152 connected to the auxiliary drive wheel 151. The auxiliary drive wheel 151 is in frictional contact with the transmission bar 11 disposed in the channel 1201. The torque energy storage unit 152 provides forward or reverse rotational force to the auxiliary drive wheel 151 and provides auxiliary thrust or pull force to the transmission bar 11 through the auxiliary drive wheel 151. The specific construction of the auxiliary drive wheel 151 and the torque energy storage unit 152 has been described above and will not be repeated here.

[0080] The above description is merely an embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical content of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An electric drive mechanism for a sunshade curtain, used in a sunshade curtain of a motor vehicle, and capable of controlling the unfolding and closing of a curtain fabric of the sunshade curtain, characterized in that: The electric drive mechanism includes a transmission bar and a drive assembly. The transmission bar can drive the curtain, and the drive assembly includes a housing, a drive wheel, a driven wheel, and a motor, wherein: The housing provides a drive bar travel path, and the drive bar is movably disposed on the drive bar travel path; The driving wheel and the driven wheel are respectively pivotally mounted on the housing and located on opposite sides of the transmission bar's movement path, and are in frictional contact with the transmission bar located on the transmission bar's movement path; The motor is located in the housing and provides rotational power to the drive wheel.

2. The electric drive mechanism for the sunshade curtain according to claim 1, characterized in that: The electric drive mechanism further includes a transmission gear set, which includes a first transmission gear and a second transmission gear. The first transmission gear is coaxially connected to the driving wheel, and the second transmission gear is coaxially connected to the driven wheel and meshes with the first transmission gear. The motor can drive the driving wheel to rotate and synchronously drive the driven wheel through the transmission gear set.

3. The electric drive mechanism for the sunshade curtain according to claim 1, characterized in that: The electric drive mechanism further includes a torque storage unit connected to the driven wheel. The torque storage unit can provide auxiliary force for clockwise or counterclockwise rotation of the driven wheel and provide auxiliary thrust or pull force to the drive bar.

4. The electric drive mechanism for the sunshade curtain according to claim 3, characterized in that: The torque storage unit includes a base, a connecting rod, and a torsion spring. The base is disposed on the housing and has a receiving chamber. The connecting rod is pivotally disposed in the receiving chamber of the base and is coaxially connected to the driven wheel. The torsion spring is disposed in the receiving chamber of the base and is connected between the base and the connecting rod. The torsional force pre-stored in the torsion spring acts on the driven wheel.

5. The electric drive mechanism for the sunshade curtain according to claim 1 or 2, characterized in that: The electric drive mechanism further includes an auxiliary torque supply assembly, which includes an auxiliary drive wheel and a torque storage unit. The auxiliary drive wheel is pivotally mounted on the housing and is located on the same side of the transmission bar's movement path as the driven wheel. The auxiliary drive wheel is in frictional contact with the transmission bar. The torque storage unit is connected to the auxiliary drive wheel and can provide rotational force to the auxiliary drive wheel, and provide auxiliary thrust or pull force to the transmission bar through the auxiliary drive wheel.

6. The electric drive mechanism for the sunshade curtain according to claim 5, characterized in that: The torque energy storage unit includes a base, a shaft, and a torsion spring. The base is mounted on the housing and has an accommodating space. The base is coaxially connected to the auxiliary drive wheel and can rotate together. The shaft is pivotally mounted in the accommodating space of the base and fixed to the housing. The torsion spring is located in the accommodating space of the base and is connected between the base and the shaft. The torsion spring can act on the auxiliary drive wheel with a pre-stored torsional elastic force, thereby providing auxiliary thrust or pull force to the transmission bar through the auxiliary drive wheel.

7. The electric drive mechanism for the sunshade curtain according to claim 5, characterized in that: The torque energy storage unit includes a base, a shaft, and a torsion spring. The base is fixed to the housing and has an accommodating space. The shaft is pivotally mounted in the accommodating space of the base and is coaxially connected to the auxiliary drive wheel and can rotate together. The torsion spring is located in the accommodating space of the base and is connected between the base and the shaft. The torsion spring can act on the auxiliary drive wheel with a pre-stored torsional elastic force, and provide auxiliary thrust or pull force to the transmission bar through the auxiliary drive wheel.

8. The electric drive mechanism for the sunshade curtain according to any one of claims 1 to 4, characterized in that: The housing forms a channel that matches the drive bar. The drive bar is movably inserted through the channel and uses the channel as the path for the drive bar to move. The housing forms a drive wheel chamber and a driven wheel chamber on opposite sides of the channel, respectively, which are connected to the channel. The drive wheel and the driven wheel are pivotally mounted in the drive wheel chamber and the driven wheel chamber, respectively.

9. The electric drive mechanism for the sunshade curtain according to claim 6, characterized in that: The housing forms a channel that matches the drive bar. The drive bar is movably inserted through the channel and uses the channel as the path for the drive bar to move. The housing forms a drive wheel chamber and a driven wheel chamber on opposite sides of the channel, respectively, which are connected to the channel. The drive wheel and the driven wheel are pivotally mounted in the drive wheel chamber and the driven wheel chamber, respectively.

10. The electric drive mechanism for the sunshade curtain according to claim 7, characterized in that: The housing forms a channel that matches the drive bar. The drive bar is movably inserted through the channel and uses the channel as the path for the drive bar to move. The housing forms a drive wheel chamber and a driven wheel chamber on opposite sides of the channel, respectively, which are connected to the channel. The drive wheel and the driven wheel are pivotally mounted in the drive wheel chamber and the driven wheel chamber, respectively.

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