Electrical transmission device for a curtain of a vehicle

Abstract

An electrical transmission device for a curtain (1) of a vehicle, comprising a curtain frame (11), an automatic extension frame (2), a roller blind tube (3), and an electrical transmission mechanism (4), wherein the automatic extension frame (2) is movably provided on the rear side of the curtain frame (11), wherein the roller blind tube (3) is provided in the curtain frame (11), wherein a curtain fabric (19) is provided between the roller blind tube (3) and the rear side of the automatic extension frame (2), wherein a curtain frame closure cover (14) is provided at each of the left and right ends of the curtain frame (11), wherein a driving force receiving element (31) is provided fixed in the roller blind tube (3), wherein the driving force receiving element (31) is provided with a first driving force receiving hole (32); the electric transmission mechanism (4) comprises a transmission housing (41) and an electric motor (47) and a reduction device (48), wherein the electric motor (47) and the reduction device (48) are mounted in the transmission housing (41), wherein the outer diameter of the transmission housing (41) is smaller than the inner diameter of the roller tube (3), wherein the roller tube (3) is freely rotatable outside the electrical transmission mechanism (4), characterized by that a fixed connecting part (15) is fixedly provided in one curtain frame closure cover (14), wherein a fixed limiting groove (16) and a first through-hole wire (17) are provided in the fixed connecting part (15), wherein the other curtain frame closure cover (14) is movably connected axially to one end of the roller blind tube (3), wherein a bearing (33) is provided in the other end of the roller blind tube (3); wherein the outer end of the transmission housing (41) is provided with a fixed limiting head (42) which fits with the fixed limiting groove (16) and a bearing groove (43), the fixed limiting head (42) being firmly inserted into the fixed limiting groove (16), wherein a rolling tube brake mechanism (5) is fixedly provided at an inner end of the transmission housing (41), and one side of the rolling tube brake mechanism (5) is connected to the reduction device (48), the other side of the rolling tube brake mechanism (5) being movably provided with a first transmission connector (56); wherein the first transmission connector (56) is fixedly inserted into the first driving force receiving hole (32), wherein the bearing (33) is inserted into the bearing groove (43).

Description

TECHNICAL FIELD

[0001] The invention relates to a curtain of a vehicle, in particular to a fully automatic electrical transmission device for a curtain of a vehicle with a self-locking function. STATE OF THE ART

[0002] With the development of the automotive industry, the technical requirements in the field of auto parts are also increasing rapidly. Many vehicles, such as SUVs and the like, are equipped with a trunk curtain. Therefore, a wide variety of trunk curtains and various related technical solutions are emerging in this field.

[0003] The curtain can not only block various items in the trunk, but also place lighter items on the curtain fabric, making the vehicle more tidy, beautiful, and very practical. In the traditional vehicle blind curtain, there is already a semi-automatic type, that is, in the vehicle blind curtain, an automatic rolling mechanism is provided. The automatic rolling mechanism includes a rotary torsion spring and a rolling tube. A curtain fabric is provided on the rolling tube. The rear end of the curtain fabric is firmly connected to a hard lath tension block. When used, it needs to be manually tensioned and buckled at the rear of the car. The curtain fabric can be automatically retracted into the curtain fabric rolling tube without external force.

[0004] With the development of science and technology, people's living requirements are constantly improving, and the full automation of accessories is also widely used.

[0005] Due to the particularity of the position, shape and use of this curtain of the vehicle, there are currently very few products or disclosed technologies for electric curtain.

[0006] For example, prior application CN 202010287916.5 (CN111409569B) discloses a power contact device for an electric curtain, and application CN 202010287918.4 (CN111186382B) discloses a multifunctional curtain of a vehicle. Although the technical solutions of both applications are scientific and reasonable and have good practicability, the power device is arranged under the curtain frame, and there may be better design solutions.

[0007] Since the electric curtain is wound up electrically, it must also be equipped with an automatic extension frame that extends the curtain backwards, and this extension frame must have a relative stretching force, otherwise the curtain will collapse without tension.

[0008] However, there is the problem that neither the power nor the reduction gear have absolute self-locking, so after the curtain is retracted, it is likely that the curtain fabric wound on the roller blind tube will be slowly pulled off by the stretching force of the automatic extension frame.

[0009] Some other prior art documents are DE 19530310A1, DE 19953200A1.

[0010] In view of the above, the skilled person attempts to develop a fully automatic, safe and practical electric transmission device for a curtain of a vehicle in which a self-locking mechanism and a drive mechanism are arranged in the roller blind tube. CONTENT OF THE PRESENT INVENTION

[0011] The technical problem to be solved by the present invention is to provide an electrical transmission device for a fully automatic curtain of a vehicle with a self-locking function.

[0012] The invention provides an electrical transmission device according to claim 1. Advantageous embodiments are set out in the subclaims.

[0013] An electrical transmission device for a vehicle curtain, comprising a curtain frame, an automatic extension frame, a roller blind tube, and an electrical transmission mechanism, wherein the automatic extension frame is movably provided on the back of the curtain frame, the roller blind tube is provided in the curtain frame, and a curtain fabric is provided between the roller blind tube and the back of the automatic extension frame. A curtain frame closure cover is provided at each of the left and right ends of the curtain frame. A fixed connecting part is fixedly provided in the curtain frame closure cover on one side. A fixed limiting groove and a first wire hole are provided in the fixed connecting part. The curtain frame closure cover is movably connected axially to one end of the roller blind tube on the other side.wherein a bearing is provided in the other end of the roller tube;, wherein a driving force receiving element is provided fixed in the roller blind tube, wherein the driving force receiving element is provided with a first driving force receiving hole; the electric transmission mechanism comprises a transmission housing and an electric motor and a reduction device mounted in the transmission housing, wherein the outer end of the transmission housing is provided with a fixed limiting head which mates with the fixed limiting groove and a bearing groove, wherein the fixed limiting head is fixedly fitted into the fixed limiting groove, wherein a rolling tube braking mechanism is fixedly provided at an inner end of the transmission housing, and one side of the rolling tube braking mechanism is connected to the reduction device, the other side of the rolling tube braking mechanism being movably provided with a first transmission connector; wherein the first transmission connector is fixedly inserted into the first driving force receiving hole, wherein the bearing is inserted into the bearing groove, wherein the outer diameter of the transmission housing is smaller than the inner diameter of the roller tube, wherein the roller tube is freely rotatable outside the electric transmission mechanism.

[0014] Further preferred solutions of the present invention are: the rolling tube brake mechanism comprises a brake housing and a brake element and a transmission element movably provided in the brake housing, wherein the brake element has a first transmission connector, a first limiting rotary element and a movable assembly, wherein the movable assembly is provided with an inner shaft moving hole, wherein two brake blocks are fixedly provided on the outside of the movable assembly; wherein the transmission member comprises a second limiting rotary member, an inner shaft and two unlocking members, wherein the inner shaft is movably provided in the inner shaft moving hole, wherein the two unlocking members are movably fitted on the movable assembly, wherein two brake blocks are movable in a space between two unlocking members.

[0015] Further preferred solutions of the present invention are: the outer diameters of the two brake blocks are equal to the outer diameters of the two unlocking elements, wherein opposite gaps are provided between the two brake blocks and the two unlocking elements, wherein more than one brake spring is arranged between the inner hole and the brake blocks and the unlocking elements, wherein the outer diameter of the brake spring is equal to the diameter of the inner hole, wherein the outer diameter of the brake block and the unlocking element is smaller than the inner diameter of the brake spring.

[0016] Further preferred solutions of the present invention are: a force absorbing elbow is provided at each end of the brake spring, wherein the force absorbing elbows are arranged at each end in gaps between the brake blocks and the unlocking elements, wherein, regardless of whether the brake block rotates clockwise or counterclockwise, there is a force absorbing elbow which is pressed by one of the brake blocks, so that the outer diameter of the brake spring is increased, whereby the expanding brake takes place in the inner hole, wherein the brake housing applies the brake to the brake element; Regardless of whether the release element rotates clockwise or counterclockwise, there is a force receiving elbow pressed by one of the release elements, so that the outer diameter of the brake spring is reduced, allowing the brake spring to rotate freely in the inner hole to cause the transmission element to be coupled and rotated with the brake element.

[0017] Further preferred solutions of the present invention are: the electric motor in the transmission housing is connected to the reduction device, wherein a second transmission connector is connected to the reduction device, wherein one side of the transmission element is provided with a second driving force receiving hole which mates and is plugged together with the second transmission connector; The outer end of the transmission housing is provided with a second through-hole for the wire.

[0018] Further preferred solutions of the present invention are: a telescopic mounting sleeve is movably mounted on the left and right ends of the curtain frame, wherein a first tension spring is provided between the fixed connecting part and the telescopic mounting sleeve, wherein the first tension spring always ejects the telescopic mounting sleeve outwards; The electrical transmission mechanism also includes an MCU single-chip microcomputer, wherein a line contact piece is provided on the outside of the telescopic mounting sleeve, the line contact piece and the MCU single-chip microcomputer being connected via the power supply data line.

[0019] Further preferred solutions of the present invention are: the curtain frame is installed between the side panels of the vehicle on the left and right sides of the vehicle, the left and right side panels of the vehicle each being provided with curtain frame mounting holes that mate with the telescopic mounting sleeve, wherein a power source-data source contact piece corresponding to the line contact piece is provided in the curtain frame mounting hole on one side; the backs of the left and right side panels of the vehicle are each provided with a curtain frame buckle groove.

[0020] Further preferred solutions of the present invention are: the automatic extension frame comprises one or more sets of pleat components arranged symmetrically on the left and right sides, each set of pleat components comprising a first pleat bar and a second pleat bar axially connected to the first pleat bar, the front end of the first pleat bar being axially connected in a pleat bar axial connection seat, the pleat bar axial connection seat being fixed to a rear side of the curtain frame, the rear ends of the second pleat bar of the left and right sets being axially connected to a connecting crossbar, a second tension spring being provided in the axial connection between the first pleat bar and the second pleat bar; a second tension spring is also provided at the axial connection between the front end of the first folding strip and the folding strip axle connection seat and at the axial connection between the rear end of the second folding strip and the connection crosspiece; The second tension spring always puts the automatic extension frame into an extended state.

[0021] Further preferred solutions of the present invention are: the left and right ends of the connecting crosspiece are fixedly provided with a limit buckle; One rear side of the connecting crosspiece is permanently fitted with a shielding hard plate.

[0022] Further preferred solutions of the present invention are: an induction switch is arranged in a door frame of the rear door of the vehicle, the induction switch being electrically connected to the MCU single-chip microcomputer, the induction switch controlling the extension and retraction of the curtain of the vehicle through the MCU single-chip microcomputer, the curtain of the vehicle being retracted when the rear door of the vehicle is opened, the curtain of the vehicle being extended when the rear door of the vehicle is closed.

[0023] The advantages of the present invention are as follows: the structure is scientific and reasonable, and the electrical transmission mechanism is located in the roller tube, which is safer. The roller tube has a stronger self-locking ability under the action of the roller tube braking mechanism. The technical solution of the present invention can more fully automate the vehicle curtain. SHORT DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of an electric curtain of the present invention as installed in a vehicle and used for deployment; Fig. 2 is a perspective view of a structure of the vehicle-mounted automatic extension frame of the electric curtain; Fig. 3 is a partial perspective view of an electric curtain frame according to the present invention; Fig. 4 is a partial sectional perspective view of an electric curtain frame according to the present invention; Fig. 5 is a partially cross-sectional exploded structural view of an electric curtain frame according to the present invention; Fig. 6 is a partially sectioned perspective view of an electric blind tube according to the present invention; Fig. 7 is a partially sectioned exploded perspective view of an electric blind tube according to the present invention; Fig. 8 is an exploded, cross-sectional perspective view of an electrical transmission mechanism according to the present invention; Fig. 9 is a sectional perspective view of an electric transmission mechanism and a rolling tube brake mechanism of the present invention; Fig. 10 is a sectional perspective view of a rolling tube brake mechanism of the present invention; Fig. 11 is a sectional exploded perspective view of a rolling tube brake mechanism of the present invention; Fig. 12 is an assembled perspective view of a rolling tube brake mechanism of the present invention; Fig. 13 is a sectional perspective view of a rolling tube brake mechanism of the present invention; Fig. 14 is a schematic side view of the brake spring according to the invention; Fig. 15 is a structural diagram of an electric curtain according to the present invention; Fig. 16 is a structural diagram of the folding operation of an electric curtain according to the present invention; Fig. 17 is a partial structural view of an electric curtain on one side according to the present invention; Fig. 18 is a sectional perspective structural view of an electric curtain according to the present invention. DETAILED DESCRIPTION

[0024] The present invention will be described in more detail below in conjunction with the accompanying drawings and exemplary embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of illustrating the preferred embodiments and should therefore not be considered as limiting the scope of the present invention. Furthermore, the figures are only intended to conceptually show the composition or structure of the described subject matter and may contain exaggerated representations, and the figures are not necessarily to scale. The description is merely exemplary in nature and is not intended to limit the scope of the present invention.

[0025] It should also be noted that the terms "top", "bottom", "front", "back", "inside", "outside", "left", "right", clockwise, counterclockwise indicate an orientation or a positional relationship as illustrated based on the figures, which are solely for the purpose of describing the present invention and simplifying the description, and do not indicate or imply that the device or component in question necessarily has a particular orientation, must be constructed and operated in a particular orientation, and therefore cannot be construed as a limitation of the invention.

[0026] As shown in the figures: A is the front end, B is the rear end, E is the brake side and F is the unlock transmission side; 1. Electric curtain, 2. Automatic extending frame, 3. Roller blind tube, 4. Electric transmission mechanism, 5. Roller tube braking mechanism, 6. Side plate of a vehicle, 8. Curtain frame buckle groove; 11. Curtain frame, 12. Telescopic mounting sleeve, 13. Wire contact piece, 14. Curtain frame closure cover, 15. Fixed connecting part, 16. Fixed limiting groove, 17. First wire hole, 18. First tension spring, 19. Curtain fabric; 21. Connecting crosspiece, 22. Limit buckle, 23. First folding bar, 24. Second folding bar, 25. Folding bar axle connecting seat, 26. Second tension spring, 27. Shielding hard plate; 31. Driving force receiving element, 32. First driving force receiving hole, 33. Bearing, 35. Power supply data connection cable, 36. Fixing pin; 41. Transmission housing, 42. Fixed limit head, 43. Bearing groove, 44. Second wire hole, 45. Second transmission connector, 46. MCU single-chip microcomputer, 47. Electric motor, 48. Reduction device; 51. Brake housing, 52. Inner hole, 53. First limit rotary element, 54. Movable assembly, 55. Brake block, 56. First transmission connector, 57. Inner shaft moving hole, 61. Second limit rotary element, 62. Inner shaft, 63. Release element, 65. Second driving force receiving hole, 66. Brake spring, 67. Power receiving elbow.

[0027] As in Fig. 1 to 9, an electric transmission device for a curtain of a vehicle comprises a curtain frame 11, an automatic extension frame 2, a roller blind tube 3, and an electric transmission mechanism 4. The automatic extension frame 2 is movably provided on the rear side of the curtain frame 11, the roller blind tube 3 is provided in the curtain frame 11, a curtain fabric 19 is provided between the roller blind tube 3 and the rear side of the automatic extension frame 2, a curtain frame closure cover 14 is provided at the left and right ends of the curtain frame 11, a fixed connecting part 15 is fixedly provided in the curtain frame closure cover 14 on one side, a fixed limiting groove 16 and a first wire hole 17 are provided in the fixed connecting part 15, and the curtain frame closure cover 14 is movably connected axially to one end of the roller blind tube 3 on the other side.wherein a bearing 33 is provided in the other end of the roller tube 3;, a driving force receiving member 31 fixed by a fixing pin 36 is fixedly provided in the roller blind tube 3, the driving force receiving member 31 being provided with a first driving force receiving hole 32; wherein the electric transmission mechanism 4 comprises a transmission housing 41 and an electric motor 47 and a reduction device 48 mounted in the transmission housing 41, the outer end of the transmission housing 41 being provided with a fixed limiting head 42 that fits with the fixed limiting groove 16 and a bearing groove 43, the fixed limiting head 42 being fixedly fitted into the fixed limiting groove 16, a rolling tube braking mechanism 5 being fixedly provided at an inner end of the transmission housing 41, and one side of the rolling tube braking mechanism is connected to the reduction device 48, the other side of the rolling tube braking mechanism 5 being movably provided with a first transmission connector 56; wherein the first transmission connector 56 is fixedly inserted into the first driving force receiving hole 32, the bearing 33 is fitted into the bearing groove 43, the outer diameter of the transmission housing 41 is smaller than the inner diameter of the roller blind tube 3, the roller blind tube 3 being freely rotatable outside the electric transmission mechanism 4.

[0028] The outer end of the electric transmission mechanism 4 is fixed in the curtain frame closure cover 14 on one side of the stationary curtain frame 11. The first transmission connector 56 drives the drive force receiving element 31 fixed in the blind tube 3, thereby rotating the blind tube 3. Due to the relative free rotation of the electric transmission mechanism 4 and the blind tube 3, the bearing 33 is provided to achieve better concentricity between the blind tube 3 and the electric transmission mechanism 4, and thus better lubrication.

[0029] As in Fig. 8 to 14, the rolling tube brake mechanism 5 comprises a brake case 51 and a brake member and a transmission member movably provided in an inner hole 52 on one side of the brake case 51, the brake member having a first transmission connector 56, a first limiting rotary member 53 and a movable assembly 54, the movable assembly 54 being provided with an inner shaft moving hole 57, two brake blocks 55 being fixedly provided on the outer side of the movable assembly 54, which are integrally formed; wherein the transmission element comprises a second limiting rotary element 61, an inner shaft 62 and two unlocking elements 63 which are also formed integrally, wherein the inner shaft 62 is movably provided in the inner shaft moving hole 57, wherein the two unlocking elements 63 are movably fitted on the movable assembly 54, wherein the two brake blocks 55 are movable in a space between two unlocking elements 63.

[0030] As in Fig. 11 to 13, the outer diameters of the two brake blocks 55 are equal to the outer diameters of the two unlocking elements 63, wherein opposite gaps are provided between the two brake blocks 55 and the two unlocking elements 63, wherein more than one brake spring 66 is arranged between the inner hole 52 and the brake blocks and the unlocking elements, wherein the outer diameter of the brake spring 66 is equal to the diameter of the inner hole 52, wherein the outer diameter of the brake block 55 and the unlocking element 63 is smaller than the inner diameter of the brake spring 66.

[0031] As in Fig. 12, Fig. 13 and Fig. 14, a force receiving elbow 67 is provided at each end of the brake spring 66, wherein the force receiving elbows 67 are arranged at each end in gaps between the brake blocks 55 and the unlocking elements 63, wherein, regardless of whether the brake block 55 rotates clockwise or counterclockwise, there is a force receiving elbow 67 which is pressed by one of the brake blocks 55, so that the outer diameter of the brake spring 66 is enlarged, whereby the expanding brake takes place in the inner hole 52, wherein the brake housing 51 applies the brake to the brake element; as in Fig. 13 and Fig. As shown in Figure 14, both brake blocks 55 are provided on the outside of the power take-off manifold. Therefore, regardless of the direction in which the braking element rotates, one of the two brake blocks 55 presses on the power take-off manifold 67, extending the brake spring 66 and implementing braking and locking, as on the brake side E in the figures; Regardless of whether the release member 63 rotates clockwise or counterclockwise, there is a force-receiving elbow 67 that is pressed by one of the release members 63, so that the outer diameter of the brake spring 66 is reduced, allowing the brake spring to rotate freely in the inner hole 52 to cause the transmission member to be coupled and rotated with the brake member. As shown in FIGS. 13 and 14, both release members 63 are provided on the inside of the force-receiving elbow. Therefore, regardless of which direction the transmission member rotates, one of the two release members 63 will press the force-receiving elbow 67 to contract the brake spring 66 to implement rotation and transmission, as shown on the release transmission side F.

[0032] The roller tube braking mechanism 5 is designed so that the roller tube 3 is not freely rotatable and is always in the locked state; however, the electric motor 47 can drive the roller tube 3 freely rotating via the reduction device 58.

[0033] As in Fig. 8, Fig. 9, the electric motor 47 in the transmission case 41 is connected to the reduction device 48, a second transmission connector 45 is connected to the reduction device 48, one side of the transmission member being provided with a second driving force receiving hole 65 which mates with and is fitted together with the second transmission connector 45; the outer end of the transmission housing 41 is provided with a second wire hole 44.

[0034] As in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 15, Fig. 16 and Fig. 17, the telescopic mounting sleeve 12 is movably mounted on the left and right ends of the curtain frame 11, a first tension spring 18 being provided between the fixed connecting part 15 and the telescopic mounting sleeve 12, the first tension spring 18 always ejecting the telescopic mounting sleeve 12 outwards; the electrical transmission mechanism 4 also includes an MCU single-chip microcomputer 46, wherein on the outside of the telescopic mounting sleeve 12 a Line contact piece 13 is provided, wherein the line contact piece 13 and the MCU single-chip microcomputer 46 are connected via the power supply data line 35.

[0035] The MCU single-chip microcomputer 46 uses the rotational speed of the electric motor 47 to control the extending stroke and retracting stroke of the curtain of the vehicle, so that the MCU single-chip microcomputer 46 controls the electric motor 47 to automatically stop when the curtain of the vehicle extends to the curtain frame buckle groove 8 or after the curtain is fully retracted.

[0036] As in Fig. 1, Fig. 2 and Fig. 3, the curtain frame 11 is installed between the side plates 6 of the vehicle on the left and right sides of the vehicle, the left and right side plates 6 of the vehicle are each provided with curtain frame mounting holes that fit with the telescopic mounting sleeve 12, and a power source-data source contact piece 13 corresponding to the line contact piece is provided in the curtain frame mounting hole on one side; The rear sides of the left and right side panels 6 of the vehicle are each provided with a curtain frame buckle groove 8. The power source-data source contact piece is mounted in a curtain frame mounting hole in the side panel 6 of the vehicle and electrically connected to the vehicle power supply and the induction switch; after the curtain frame 11 is mounted on the vehicle, a line contact piece 13 provided on the outside of the telescopic mounting sleeve 12 is brought into contact with a power source-data source contact piece and electrically connected.

[0037] As in Fig. 2, Fig. 15, Fig. 16, Fig. 17 and Fig. 18, the automatic extension frame 2 comprises one or more sets of pleat components arranged symmetrically on the left and right sides, each set of pleat components comprising a first pleat bar 23 and a second pleat bar 24 axially connected to the first pleat bar, the front end of the first pleat bar 23 being axially connected in a pleat bar axis connection seat 25, the pleat bar axis connection seat 25 being fixed to a rear side of the curtain frame 11, the rear ends of the second pleat bar 24 of the left and right sets being axially connected to a connection crosspiece 21, a second tension spring 26 being provided in the axial connection between the first pleat bar 23 and the second pleat bar 24; a second tension spring 26 is also provided at the axial connection between the front end of the first folding strip 23 and the folding strip axle connection seat 25 and at the axial connection between the rear end of the second folding strip 24 and the connecting crosspiece 21; the second tension spring 26 always puts the automatic extension frame 2 into an extended state.

[0038] Three axial connection points are provided between the first folding bar 23 and the second folding bar of each set of folding components, and the folding bar axial connection seat 25 and the connecting crosspiece 21. In the automatic extension frame 2, one or two of the second tension springs 26 can be selectively provided in three axial connections depending on the requirements for the magnitude of the extension force. Also, to increase the extension force, a first tension spring 18 can be provided in each of the three axial connections.

[0039] As in Fig. 1, Fig. 15, Fig. 16 and Fig. 18, the left and right ends of the connecting crosspiece 21 are fixedly provided with a limit buckle 22; a rear side of the connecting crosspiece 21 is fixedly provided with a shielding hard plate 27.

[0040] Regarding the structure and working principle of the automatic extension frame, a multifunctional curtain of a vehicle with application number 202010287918.4 (CN111186382B) of the company is introduced in detail, and this article will not go into too much detail.

[0041] As in Fig. 6 and Fig.8, an induction switch is arranged in a door frame of the rear door of the vehicle, the induction switch being electrically connected to the MCU single-chip microcomputer 46, the induction switch controlling the extension and retraction of the curtain of the vehicle by the MCU single-chip microcomputer 46, the curtain of the vehicle being retracted when the rear door of the vehicle is opened, the curtain of the vehicle being extended when the rear door of the vehicle is closed.

[0042] Existing vehicles are generally equipped with rear doors. The induction switch can be arranged in the rear door frame of the vehicle. The induction switch can also be replaced with a contact switch. When the rear door is closed and touched, the vehicle curtain will extend. When the rear door is opened and there is no contact, the vehicle curtain will retract. The vehicle curtain can be more automated and more convenient to use.

Claims

[1] An electrical transmission device for a curtain (1) of a vehicle, comprising a curtain frame (11), an automatic extension frame (2), a roller blind tube (3) and an electrical transmission mechanism (4), wherein the automatic extension frame (2) is movably provided on the back of the curtain frame (11), wherein the roller blind tube (3) is provided in the curtain frame (11), wherein a curtain fabric (19) is provided between the roller blind tube (3) and the back of the automatic extension frame (2), wherein a curtain frame closure cover (14) is provided at the left and right ends of the curtain frame (11), wherein a driving force receiving element (31) is provided fixed in the roller blind tube (3), wherein the driving force receiving element (31) is provided with a first driving force receiving hole (32); the electric transmission mechanism (4) comprises a transmission housing (41) and an electric motor (47) and a reduction device (48), wherein the electric motor (47) and the reduction device (48) are mounted in the transmission housing (41), wherein the outer diameter of the transmission housing (41) is smaller than the inner diameter of the roller tube (3), wherein the roller tube (3) is freely rotatable outside the electrical transmission mechanism (4), characterized by , that a fixed connecting part (15) is fixedly provided in one curtain frame closure cover (14), wherein a fixed limiting groove (16) and a first through-hole wire (17) are provided in the fixed connecting part (15), wherein the other curtain frame closure cover (14) is movably connected axially to one end of the roller blind tube (3), wherein a bearing (33) is provided in the other end of the roller blind tube (3); wherein the outer end of the transmission housing (41) is provided with a fixed limiting head (42) which fits with the fixed limiting groove (16) and a bearing groove (43), the fixed limiting head (42) being firmly inserted into the fixed limiting groove (16), wherein a rolling tube brake mechanism (5) is fixedly provided at an inner end of the transmission housing (41), and one side of the rolling tube brake mechanism (5) is connected to the reduction device (48), the other side of the rolling tube brake mechanism (5) being movably provided with a first transmission connector (56); wherein the first transmission connector (56) is fixedly inserted into the first driving force receiving hole (32), wherein the bearing (33) is inserted into the bearing groove (43). [2] Electrical transmission device for a curtain (1) of a vehicle according to claim 1, characterized bythat the rolling tube brake mechanism (5) comprises a brake housing (51) and a braking element and a transmission element which are movably provided in an inner hole (52) on one side of the brake housing (51), wherein the braking element has the first transmission connector (56), a first limiting rotary element (53) and a movable assembly (54), wherein the movable assembly (54) is provided with an inner shaft moving hole (57), wherein two brake blocks (55) are fixedly provided on the outside of the movable assembly (54); wherein the transmission element comprises a second limiting rotary element (61), an inner shaft (62) and two unlocking elements (63), wherein the inner shaft (62) is movably provided in the inner shaft moving hole (57), wherein the two unlocking elements (63) are movably mounted on the movable assembly (54), wherein the two brake blocks (55) are movable in a space between the two unlocking elements (63). [3] Electrical transmission device for a curtain (1) of a vehicle according to claim 2, characterized by in that the outer diameters of the two brake blocks (55) are equal to the outer diameters of the two unlocking elements (63), wherein an opposing gap is provided between a brake block (55) and an unlocking element (63), wherein more than one brake spring (66) is arranged between the inner hole (52) and the brake blocks (55) and the unlocking elements (63), wherein the outer diameter of the brake spring (66) is equal to the diameter of the inner hole (52), wherein the outer diameter of the brake block (55) and of the unlocking element (63) is smaller than the inner diameter of the brake spring (66). [4] Electrical transmission device for a curtain (1) of a vehicle according to claim 3, characterized bythat a force absorption manifold (67) is provided at each end of the brake spring (66), wherein the force absorption manifolds (67) are each arranged in the gaps between the brake blocks (55) and the unlocking elements (63), wherein, regardless of whether the brake block (55) rotates clockwise or counterclockwise, there is a force absorption manifold (67) which is pressed by one of the brake blocks (55) so that the outer diameter of the brake spring (66) is increased, whereby an expanding brake is produced in the inner hole (52), so that the brake housing (51) brakes the brake element;regardless of whether the unlocking element (63) rotates clockwise or counterclockwise, there is a force-absorbing elbow (67) which is pressed by one of the unlocking elements (63) so that the outer diameter of the brake spring (66) is reduced, whereby the brake spring (66) can rotate freely in the inner hole (52) to cause the transmission element to be coupled and rotated with the brake element; [5] Electrical transmission device for a curtain (1) of a vehicle according to claim 2, characterized bythat the electric motor (47) in the transmission housing (41) is connected to the reduction device (48), wherein a second transmission connector (45) is connected to the reduction device (48), wherein one side of the transmission element is provided with a second driving force receiving hole (65) which fits and is plugged together with the second transmission connector (45); the outer end of the transmission housing (41) is provided with a second wire hole (44). [6] Electrical transmission device for a curtain (1) of a vehicle according to claim 5, characterized bythat a telescopic mounting sleeve (12) is movably mounted on each of the left and right ends of the curtain frame (11), wherein a first tension spring (18) is provided between the fixed connecting part (15) and the telescopic mounting sleeve (12), wherein the first tension spring (18) always ejects the telescopic mounting sleeve (12) outwards; the electrical transmission mechanism (4) also comprises an MCU single-chip microcomputer (46), wherein a line contact piece (13) is provided on the outside of the telescopic mounting sleeve (12), wherein the line contact piece (13) and the MCU single-chip microcomputer (46) are connected via a power supply data line (35). [7] Electrical transmission device for a curtain (1) of a vehicle according to claim 6, characterized bythat the curtain frame (11) is installed between the side plates (6) of the vehicle on the left and right sides of the vehicle, wherein the left and right side plates (6) of the vehicle are each provided with curtain frame mounting holes that mate with the telescopic mounting sleeve (12), wherein a power source-data source contact piece corresponding to the line contact piece is provided in the curtain frame mounting hole on one side; the rear sides of the left and right side plates of the vehicle are each provided with a curtain frame buckle groove (8). [8] Electrical transmission device for a curtain (1) of a vehicle according to claim 1, characterized byin that the automatic extension frame (2) comprises one or more sets of pleat components, the pleat components are arranged on the left and right sides and are arranged symmetrically, each set of pleat components comprising a first pleat bar (23) and a second pleat bar (24), the second pleat bar (24) being axially connected to the first pleat bar (23), the front end of the first pleat bar (23) being axially connected in a pleat bar axis connection seat (25), the pleat bar axis connection seat (25) being fastened to a rear side of the curtain frame (11), the rear end of the second pleat bar (24) of the left and right sets being axially connected to a connecting crosspiece (21), a second tension spring (26) being provided in the axial connection between the first pleat bar (23) and the second pleat bar (24);a second tension spring (26) is also provided at the axial connection between the front end of the first folding bar (23) and the folding bar axle connection seat (25) and at the axial connection between the rear end of the second folding bar (24) and the connecting crosspiece (21); the second tension spring (26) always sets the automatic extension frame (2) in an extended state. [9] Electrical transmission device for a curtain (1) of a vehicle according to claim 8, characterized by that the left and right ends of the connecting crosspiece (21) are fixedly provided with a limit buckle (22); a rear side of the connecting crosspiece (21) is fixedly provided with a shielding hard plate (27). [10] Electrical transmission device for a curtain (1) of a vehicle according to claim 6, characterized bythat an induction switch is arranged in a door frame of the rear door of the vehicle, wherein the induction switch is electrically connected to the MCU single-chip microcomputer (46), wherein the induction switch controls the extension and retraction of the curtain of the vehicle by the MCU single-chip microcomputer (46); wherein the curtain (1) of the vehicle is retracted when the rear door of the vehicle is opened; wherein the curtain (1) of the vehicle is extended when the rear door of the vehicle is closed.

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