TWI749965B - Blade angle adjusting device for curtain - Google Patents

Abstract

The blade angle adjusting device of the present invention includes a housing, a transmission assembly and a driving rod. The housing has a flange inside, the transmission assembly has a first worm and a second worm, the first worm and the second worm are rotatably arranged in the housing and meshed with each other, and the outer peripheral surface of the driving rod has an elastic wing , The drive rod is inserted into the shell from a bottom hole of the shell during assembly. When the elastic wing passes through the flange of the shell, it will be squeezed and deformed by the flange. The sheet and the flange are engaged with each other to complete the assembly. Thereby, the blade angle adjusting device of the present invention does not need to repeatedly adjust the assembly angle of the drive rod, which can reduce the assembly time for consumers and increase the convenience of assembly.

Description

Blade angle adjusting device for curtain

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

The separated blade angle adjustment mechanism disclosed in the Republic of China Patent No. 201905314 allows consumers to assemble the second driving rod to the first driving rod by self-assembly when purchasing related curtain products, so that the second driving rod can be driven. The rotating rod will not protrude out of the upper beam during packaging and transportation. This not only prevents the second driving rod from being broken by improper external force, but also prevents the blade from being squeezed and damaged by the second driving rod. Deformed.

In the aforementioned patent documents, since the first driving rod is hidden in the housing, the positions of the two positioning holes cannot be seen from the appearance, which causes consumers to often need to adjust the assembly angle of the second driving rod 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 quite 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 main objective, the blade angle adjusting device of the present invention includes a housing, a transmission assembly and a driving rod. The two opposite sides of the top end of the shell each have a through hole, the bottom end of the shell 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 wing accommodating groove; the transmission assembly has a first worm and a second worm, the first worm has a first shaft and a first worm tooth Part and a transmission hole, the first worm gear part is ringed on the outer peripheral surface of the first rod part and located between the two ends of the first rod part, the transmission hole is non-circular and penetrates the first rod axially Part, the first worm is rotatably arranged in the housing and the ends of the first shaft are penetrated in the perforations of the housing, and the second worm has a second shaft and a first shaft. Two worm tooth parts and a first assembly part, the second worm tooth part is ringed on the outer peripheral surface of the second rod part, the first assembling part is connected to the bottom end of the second rod part, the second worm part It is rotatably arranged in the housing and engages with the first worm gear part of the first worm by the second worm gear part; the driving rod has a second assembly part, an elastic wing 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, whereby the drive rod allows the second assembly part to be assembled. The two assembling parts penetrate the shell from the bottom hole of the shell. When the elastic flap passes through the flange of the shell, it will be squeezed and deformed by the flange. The elastic fin is located in the fin accommodating groove of the shell and is mutually engaged with the flange of the shell, and at the same time allows the second assembly connection part to be assembled to the first assembly connection part of the second worm, and this is completed The assembly of the drive rod.

It can be seen from the above that 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, thereby improving assembly efficiency and increasing assembly convenience.

Preferably, the bottom end of the second set of connecting parts has a groove corresponding to the elastic wing. When the elastic wing is deformed under pressure, the groove receives a part of the elastic wing 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 a direction away from the flange.

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

Preferably, the first assembly part is a polygonal column, the second assembly part has a polygonal hole, and the second assembly part is clamped to the first assembly part through the polygonal hole, so that the two assembly parts are assembled. Then, it will not rotate relatively, 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 penetrating the transmission hole to rotate.

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

The applicant first explains here that throughout the specification, including the following embodiments and claims in the scope of the patent application, the terms related to directionality are based on the directions in the drawings. Secondly, in the following embodiments and drawings, 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 housing 20, a transmission assembly 30, and a driving rod 60.

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

The transmission assembly 30 has a first worm 40. As shown in FIGS. 2 and 3B, the first worm 40 has a first rod portion 41, a first worm gear portion 43, and a transmission hole 44. The first worm gear portion 43 is ringed on the outer peripheral surface of the first rod 41 and is located between the two ends 42 of the first rod 41. The transmission hole 44 is non-circular (a semicircle is taken as an example here, but not as Limit) and axially penetrate the first rod 41 for clamping a transmission shaft 74 with the same cross-sectional shape (as shown in FIG. 1). The first worm 40 is rotatably disposed in the housing 20, and the first worm gear 43 is located in the first accommodating groove 23, and the two ends 42 of the first rod 41 penetrate the housing 20 The two perforations are within 22.

The transmission assembly 30 further has a second worm 50, as shown in FIGS. 2 and 3B, the second worm 50 has a second rod portion 51, a second worm gear portion 52 and a first assembly connection portion 53 (in This takes a polygonal column as an example, but it is not limited to this), the second worm gear portion 52 is arranged around the outer peripheral surface of the second rod portion 51, and the top end of the first connecting portion 53 and the bottom end of the second rod portion 51 They are connected together via a disc 54. The second worm 50 is provided in the housing 20, wherein the second worm gear portion 52 and the first assembly portion 53 are respectively located in the second accommodating groove 24 and the accommodating hole 26, and on the one hand, the disc 54 is embedded in the ring The groove 25 is used to facilitate assembly and positioning. On the other hand, the second worm gear 52 is engaged 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 connecting portion 61, two elastic fins 64 and a third rod portion 65. The second assembly portion 61 has a polygonal hole 62; two elastic fins 64 are located on the two opposite sides of the second assembly portion 61 and are respectively connected to the outer peripheral surface of the second assembly 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 FIGS. 3A and 3B, when the drive rod 60 is assembled, the second assembly 61 is inserted into the housing 20 from the bottom hole 28 of the housing 20, and when the two elastic fins 64 pass through the flange 29 of the housing 20 It will be squeezed and deformed by the flange 29 once it passes through the flange 29. The two elastic fins 64 are located in the fin accommodating groove 27 of the housing 20 and mutually interact with the flange 29 of the housing 20. At the same time, the second assembly part 61 is clamped to the first assembly part 53 of the second worm 50 with a polygonal hole 62, so that the driving rod 60 can drive the second worm 50 to rotate together, thus completing the driving Assembly of rod 60. After the assembly is completed, the bottom end of the third rod 65 will protrude from the housing 20. When the user hooks a hook 72 of the adjusting rod 70 to the hook hole 66 of the third rod 65 and applies force to rotate and adjust When the rod 70 is set, the driving rod 60 will be driven by the adjusting rod 70 to drive the second worm 50 to rotate through the second connecting portion 61, and then the second worm 50 will drive the first worm 40 to rotate, and the first worm 40 can be rotated The effect of adjusting the angle of the blade is achieved through the transmission shaft 74 and other transmission elements (such as a rotating drum and a ladder rope).

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

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

10: Blade angle adjustment device 20: shell 21a: shell 21b: Shell cover 22: Piercing 23: The first holding tank 24: The second holding tank 25: ring groove 26: Pore 27: Wing accommodating slot 28: bottom hole 29: flange 30: Transmission components 40: The first worm 41: first pole 42: end 43: The first worm gear 44: drive hole 50: second worm 51: second pole 52: second worm gear 53: The first group of connections 54: plate 60: Drive rod 61: The second group of joints 62: Polygonal hole 63: Groove 64: Elastic flap 65: third pole 66: hook hole 70: Adjusting lever 72: Hook 74: drive shaft

Fig. 1 is a perspective view of the blade angle adjusting device of the present invention. Fig. 2 is a perspective exploded view of the blade angle adjusting device of the present invention. Fig. 3A is a cross-sectional view of the blade angle adjusting device of the present invention, which mainly shows a state where the elastic fin is squeezed and deformed by 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 holding tank

24: The second holding tank

25: ring groove

26: Pore

27: Wing accommodating slot

28: bottom hole

29: flange

30: Transmission components

40: The first worm

43: The first worm gear

44: drive hole

50: second worm

51: second pole

52: second worm gear

53: The first group of connections

54: plate

60: Drive rod

61: The second group of joints

63: Groove

64: Elastic flap

65: third pole

66: hook hole

Claims (6)

A blade angle adjustment device for curtains, comprising: a shell with two opposite perforations, a bottom hole, a wing accommodating groove and a flange, the wing accommodating groove is located above the bottom hole and communicates with the A bottom hole, the flange is located between the bottom hole and the wing accommodating groove; a transmission assembly having a first worm and a second worm, the first worm has a first shaft, a first worm The tooth portion and a transmission hole, the first worm gear portion is ringed on the outer peripheral surface of the first rod portion and located between the two ends of the first rod portion, the transmission hole is non-circular and penetrates the first rod axially The first worm is rotatably arranged in the housing and the ends of the first shaft are penetrated in the through holes of the housing. The second worm has a second shaft, a The second worm gear part is connected to a first assembly part, the second worm gear part is ringed 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, and the first assembly part is connected to the bottom end of the second rod part. Two worms are rotatably arranged in the housing and engage with the first worm gear of the first worm by the second worm gear; and a driving rod having a second connecting portion, 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, the top end of the third rod part is connected to the bottom end of the second assembly part, the second of the drive rod The assembly part is located in the housing and is assembled to the first assembly part of the second worm. The elastic fin of the drive rod is located in the fin accommodation groove of the housing and is clamped to the housing A flange, the third rod portion of the drive rod penetrates the bottom hole of the housing and a part is located outside the housing. The blade angle adjusting device for curtains according to claim 1, wherein the bottom end of the second set of connecting portion has a groove corresponding to the elastic wing, and when the elastic wing is deformed under pressure, the concave The groove accommodates a part of the elastic flap. The blade angle adjusting 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 a direction away from the flange . The blade angle adjusting device for curtains according to claim 1, wherein the housing further has a ring groove, the second worm further has a disc part, and the disc part is connected to the second rod part and the first set The connecting parts are embedded in the ring groove of the shell. The blade angle adjusting device for curtains according to claim 1, wherein, the first assembly connecting portion is a polygonal column, the second assembly connecting portion has a polygonal hole, and the second assembly connecting portion uses the polygonal hole The card is connected to the first group of connecting parts. The blade angle adjusting device for curtains according to claim 1, wherein the driving hole is semicircular.

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