TW202225548A - Blade angle adjustment device for curtain including a casing, a transmission assembly and a drive rod - Google Patents

Abstract

A blade angle adjustment device of the present invention includes a casing, a transmission assembly and a drive rod. The inside of the casing has a flange. The transmission assembly includes a first worm rod and a second worm rod. The first worm rod and the second worm rod are rotatably arranged in the casing and engage with each other. An outer peripheral surface of the drive rod includes an elastic fin. The drive rod is inserted into the casing from a bottom hole of the casing during assembly. When the elastic fin passes through the flange of the casing, it will be squeezed and deformed by the flange, but recovered after passing through the flange. The assembly is completed when the elastic fin and the flange are engaged with each other. Therefore, the blade angle adjustment device of the present invention does not need to repeatedly adjust an assembly angle of the drive rod, which can reduce the assembly time for consumers and increase the convenience of assembly.

Description

Blade angle adjustment device for curtains

The present invention relates to curtains, in particular to a blade angle adjustment device for curtains.

The separate blade angle adjustment mechanism disclosed in the ROC Patent No. 201905314 allows consumers to fix the second driving rod to the first driving rod in a self-assembly manner before purchasing related curtain products, so that the second driving rod can be adjusted. The rotating rod will not protrude out of the upper beam during the process of packaging and transportation, which can not only prevent the second driving rod from being broken by improper external force, but also avoid the blade being squeezed by the second driving rod and damaged or damaged. deformed.

In the aforementioned patent documents, since the first driving lever is hidden in the casing, the positions of the two positioning holes cannot be seen from the appearance, so that consumers often need to adjust the assembly angle of the second driving lever several times before the The two positioning protrusions of the second driving rod are smoothly clamped to the two positioning holes of the first driving rod, so the assembly is rather troublesome and inconvenient.

The main purpose of the present invention is to provide a blade angle adjustment device for curtains, which can improve the convenience of assembly.

In order to achieve the above-mentioned main purpose, the blade angle adjustment device of the present invention includes a casing, a transmission component and a driving rod. Two opposite sides of the top end of the casing respectively have a through hole, the bottom end of the casing has a bottom hole, a fin accommodating groove and a flange, the fin accommodating groove is located above the bottom hole and communicates with the bottom hole , the flange is located between the bottom hole and the fin accommodating groove; the transmission assembly has a first worm and a second worm, the first worm has a first rod portion, a first worm tooth and a transmission hole, the first worm gear ring is arranged on the outer peripheral surface of the first rod part and is located between the two ends of the first rod part, the transmission hole is non-circular and axially penetrates the first rod part, the first worm is rotatably arranged in the casing and the ends of the first rod part pass through the through holes of the casing; the second worm has a second rod, a first Two worm tooth parts and a first assembly part, the second worm tooth part is arranged on the outer peripheral surface of the second rod part, the first assembly part is connected to the bottom end of the second rod part, the second worm The first worm gear part is rotatably arranged in the casing and engages with the first worm gear part with the second worm gear part; the driving rod has a second assembly part, an elastic fin and a third rod part , the top end of the elastic fin is connected to the outer peripheral surface of the second assembly part, and the top end of the third rod part is connected to the bottom end of the second assembly part. The two assembling parts are inserted into the casing from the bottom hole of the casing. When the elastic fin passes through the flange of the casing, it will be squeezed and deformed by the flange. The elastic fin is located in the fin accommodating groove of the casing and is engaged with the flange of the casing, and at the same time the second assembly part is assembled to the first assembly part of the second worm, thus completing Assembly of the drive rod.

As can be seen from the above, the blade angle adjustment device of the present invention does not need to repeatedly adjust the assembly angle of the drive rod, which can reduce assembly time for consumers, improve assembly efficiency and increase assembly convenience.

Preferably, the bottom end of the second assembly portion has a groove corresponding to the elastic fin. When the elastic fin is deformed under pressure, the groove accommodates a part of the elastic fin to prevent the two from interacting with each other. put one's oar in.

Preferably, the cross-sectional shape of the fin accommodating groove is tapered, and the groove diameter of the fin accommodating groove gradually decreases in the direction away from the flange.

Preferably, the housing further has a ring groove, the second worm further has a disk portion, the disk portion is connected between the second rod portion and the first assembly portion and is arranged in the ring groove of the housing . With the above technical features, the assembly and positioning of the second worm can be facilitated.

Preferably, the first assembly portion is a polygonal column, the second assembly portion has a polygonal hole, and the second assembly portion is clamped to the first assembly portion with the polygonal hole, so that the two are assembled together. Afterwards, there is no relative rotation, so that the second worm can drive the first worm to rotate.

Preferably, the transmission hole is semicircular, so that the first worm can drive a transmission shaft passing through the transmission hole to rotate.

The detailed structure, features, assembly or usage of the blade angle adjustment device for curtains provided by the present invention will be described in the detailed description of the following embodiments. However, those with ordinary knowledge in the field of the present invention should understand that these detailed descriptions and specific embodiments for implementing the present invention are only used to illustrate the present invention, not to limit the scope of the patent application of the present invention.

The applicant first explains that in the entire specification, including the embodiments described below and the claims of the scope of the patent application, the terms related to the directionality are based on the directions in the drawings. Next, in the embodiments and drawings to be introduced below, the same element numbers represent the same or similar elements or their structural features.

Please refer to FIG. 1 , FIG. 2 and FIG. 3B , the blade angle adjusting device 10 of the present invention includes a casing 20 , a transmission assembly 30 , and a driving rod 60 .

The casing 20 is composed of a case 21a and a case cover 21b. The left and right sides of the top of the casing 20 are respectively provided with a through hole 22, and the left and right through holes 22 are communicated with each other through a first accommodation groove 23. The casing 20 has a first accommodation groove on one side of the first accommodation groove 23 and the first accommodation groove. 23 communicates with the second accommodating groove 24 . In addition, as shown in FIG. 3B , the housing 20 has a ring groove 25 , a receiving hole 26 communicating with the ring groove 25 , a fin receiving groove 27 communicating with the receiving hole 26 , and a communicating hole 26 below the second receiving groove 24 . The bottom hole 28 of the fin accommodating groove 27, wherein the fin accommodating groove 27 and the bottom hole 28 are separated by a flange 29, the cross-sectional shape of the fin accommodating groove 27 is tapered, and the fin accommodating groove 27 is tapered. The groove diameter of the placement groove 27 gradually decreases in the direction away from the flange 29 .

The transmission assembly 30 has a first worm 40. As shown in FIG. 2 and FIG. 3B, the first worm 40 has a first rod portion 41, a first worm tooth portion 43 and a transmission hole 44. The first worm tooth portion The ring 43 is arranged on the outer peripheral surface of the first rod portion 41 and is located between the two end portions 42 of the first rod portion 41, and the transmission hole 44 is non-circular (here, a semicircle is used as an example, but it is not a limit) and axially penetrate through the first rod portion 41 for clamping a transmission shaft 74 having the same cross-sectional shape (as shown in FIG. 1 ). The first worm 40 is rotatably disposed in the casing 20 , the first worm gear 43 is located in the first accommodating groove 23 , and the two ends 42 of the first rod 41 pass through the casing 20 inside the two perforations 22 .

The transmission assembly 30 further has a second worm 50. As shown in FIG. 2 and FIG. 3B, the second worm 50 has a second rod portion 51, a second worm tooth portion 52 and a first assembly portion 53 (in the A polygonal column is taken as an example, but not limited thereto), the second worm gear portion 52 is annularly disposed on the outer peripheral surface of the second rod portion 51 , the top end of the first assembly portion 53 and the bottom end of the second rod portion 51 Connected together via a disc portion 54 . The second worm 50 is disposed in the casing 20 , and the second worm tooth portion 52 and the first assembling portion 53 are respectively located in the second accommodating groove 24 and the accommodating hole 26 , and on the one hand, the disk portion 54 is embedded in the ring The slot 25 is used to facilitate assembly and positioning. On the other hand, the second worm gear 52 engages with the first worm gear 43 of the first worm 40 so that the second worm 50 can drive the first worm 40 to rotate.

The driving rod 60 has a second assembly portion 61 , two elastic fins 64 and a third rod portion 65 . The second assembling portion 61 has a polygonal hole 62 ; the two elastic fins 64 are located on two opposite sides of the second assembling portion 61 and are respectively connected to the outer peripheral surface of the second assembling portion 61 with their top ends; the third rod portion 65 The top end is connected to the bottom end of the second assembly portion 61 , and the bottom end of the third rod portion 65 has a hook hole 66 . As shown in FIG. 3A and FIG. 3B , when the driving rod 60 is assembled, the second assembly portion 61 is inserted through the bottom hole 28 of the housing 20 into the housing 20 . When the two elastic fins 64 pass through the flange 29 of the housing 20 At this time, the two elastic fins 64 are located in the fin accommodating groove 27 of the outer casing 20 and mutually with the flange 29 of the outer casing 20. At the same time, the second assembly part 61 is clamped to the first assembly part 53 of the second worm 50 through the polygonal hole 62, so that the driving rod 60 can drive the second worm 50 to rotate together, and the driving is completed. Assembly of rod 60 . After the assembly is completed, the bottom end of the third rod portion 65 will protrude out of the housing 20. When the user hooks the hook hole 66 of the third rod portion 65 with a hook portion 72 of the adjusting rod 70 and applies force to rotate the adjustment When the rod 70 is used, the driving rod 60 will be driven by the adjusting rod 70 to drive the second worm 50 to rotate through the second assembly portion 61 , and then the second worm 50 will drive the first worm 40 to rotate. After the first worm 40 is rotated, it can be The effect of adjusting the blade angle is achieved through the transmission shaft 74 and other transmission elements (such as a rotating drum and a ladder rope).

In addition, it should be added that, as shown in FIG. 2 and FIG. 3A , the bottom end of the second assembly portion 61 has two grooves 63 , and the two grooves 63 correspond to one elastic wing 64 respectively, so that the two elastic wings When the sheet 64 is squeezed and deformed by the flange 29 , a part of the sheet 64 is received by the two grooves 63 to avoid mutual interference with the second assembly portion 61 .

As can be seen from the above, the first worm 40 and the second worm 50 are originally hidden in the housing 20, and the driving rod 60 is a separate and independent component, allowing consumers to assemble the driving rod by themselves after purchasing the relevant curtain products. The 60 is fixed to the second worm 50 . When assembling the driving rod 60 , it is not necessary to repeatedly adjust the assembling angle of the driving rod 60 , which can reduce the assembling time for consumers, improve the assembling efficiency and increase the assembling convenience.

10: Blade angle adjustment device 20: Shell 21a: Shell 21b: Shell cover 22: Perforation 23: The first accommodating slot 24: Second accommodating slot 25: Ring groove 26: accommodating hole 27: fin accommodating slot 28: Bottom hole 29: Flange 30: Transmission components 40: First worm 41: The first rod 42: End 43: The first worm gear 44: Transmission hole 50: Second worm 51: Second rod 52: Second worm gear 53: The first set of connections 54: Disc Department 60: Drive lever 61: The second set of connections 62: Polygon hole 63: Groove 64: Elastic fins 65: Third rod 66: hook hole 70: Adjustment lever 72: Hook 74: Drive shaft

FIG. 1 is a perspective view of the blade angle adjustment device of the present invention. 2 is an exploded perspective view of the blade angle adjustment device of the present invention. FIG. 3A is a cross-sectional view of the blade angle adjustment device of the present invention, mainly showing the state in which the elastic fin is deformed by the extrusion of the flange. FIG. 3B is similar to FIG. 3A , and mainly shows the state after the drive rod is assembled to the second worm.

20: Shell

23: The first accommodating slot

24: Second accommodating slot

25: Ring groove

26: accommodating hole

27: fin accommodating slot

28: Bottom hole

29: Flange

30: Transmission components

40: First worm

43: The first worm gear

44: Transmission hole

50: Second worm

51: Second rod

52: Second worm gear

53: The first set of connections

54: Disc Department

60: Drive lever

61: The second set of connections

63: Groove

64: Elastic fins

65: Third rod

66: hook hole

Claims (6)

A blade angle adjustment device for curtains, comprising: a shell with two opposite through holes, a bottom hole, a fin accommodating groove and a flange, the fin accommodating groove is located above the bottom hole and communicates with the bottom hole, the flange is located between the bottom hole and the fin between the tablet accommodating grooves; A transmission assembly has a first worm and a second worm, the first worm has a first rod part, a first worm tooth part and a transmission hole, the first worm tooth part is annularly arranged on the first rod The outer peripheral surface of the first rod portion is located between the two ends of the first rod portion. The transmission hole is non-circular and axially penetrates the first rod portion. The ends of the rod portion pass through the through holes of the casing, the second worm has a second rod portion, a second worm gear portion and a first assembly portion, the second worm gear portion is annular The first assembly part is connected to the bottom end of the second rod part; the second worm is rotatably arranged in the casing and engages the the first worm gear portion of the first worm; and A driving rod has a second assembly part, an elastic fin and a third rod part, the top end of the elastic fin is connected to the outer peripheral surface of the second assembly part, and the top end of the third rod part is connected to the The bottom end of the second assembling portion, the second assembling portion of the driving rod is located in the casing and is assembled with the first assembling portion of the second worm, the elastic fin of the driving rod is located on the wing of the casing The piece is in the accommodating groove and is clamped on the flange of the casing, the third rod part of the driving rod passes through the bottom hole of the casing and a part is located outside the casing. The blade angle adjusting device for curtains according to claim 1, wherein the bottom end of the second assembly portion has a pair of grooves corresponding to the elastic fins, and when the elastic fins are deformed under pressure, the grooves A slot receives a portion of the resilient tab. The blade angle adjustment device for curtains according to claim 1, wherein the cross-sectional shape of the fin accommodating groove is tapered, and the groove diameter of the fin accommodating groove gradually decreases in the direction away from the flange . The blade angle adjustment device for curtains as claimed in claim 1, wherein the housing further has a ring groove, the second worm further has a disk portion, and the disk portion is connected to the second rod portion and the first set of The connecting parts are embedded in the annular groove of the casing. The blade angle adjustment device for curtains as claimed in claim 1, wherein the first assembling part is a polygonal column, the second assembling part has a polygonal hole, and the second assembling part is formed by the polygonal hole is clamped on the first assembly part. The blade angle adjustment device for curtains according to claim 1, wherein the transmission hole is semicircular.

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