Ceiling fan blade mounting assembly for ceiling fan

The present invention relates to a ceiling fan blade assembly, including: a mounting bracket has a positioning portion and a mounting portion, and an arm being disposed between the positioning portion and the mounting portion for connecting them together, the positioning portion is fixed to a ceiling fan's base body; plural fixing elements are secured on the mounting portion of the mounting bracket, one of the plural fixing elements located close to a position where the mounting portion and the arm are connected; an elastic plate has protrusive latch hooks which located in symmetric manner, the elastic plate is fixed by the fixing elements and located close to the position where the arm and the mounting portion are connected, and two wing portions of each elastic plate are located at both sides of the arm of the mounting bracket; a ceiling fan blade is provided at an end thereof with plural holes, the holes each have a gap, and the gap of the respective holes being directed in the same direction.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to ceiling fan, and more particularly to ceiling fan blade mounting assembly.

2. Description of the Prior Arts

Referring toFIGS. 1 and 2, a conventional ceiling fan blade mounting assembly for ceiling fan generally includes mounting bracket10and blade20. The mounting bracket10has a positioning portion11and a mounting portion12, and an arm13is disposed between the positioning portion11and the mounting portion12for connecting them together. The positioning portion11is fixed to a base body of a ceiling fan, on the mounting portion12is provided with three joints14, and each of the joints14has a head portion141and a rod portion142, an elastic plate15is located close to the arm13. The blade20is defined at an end thereof with three holes21, and each of the holes20is further defined with a gap22, the gap22of the holes20is directed to the same direction. Such that the respective holes21of the blade20can be aligned with the joints14of the mounting bracket10, so as to make the head portion141of the joints14locate at an upper surface of the blade20, and the rod portion142locate in the holes21. And then pull the blade20in opposite direction to the mounting bracket10, so as to make the rod portion142of the joints14engage in the gap22, meanwhile, the elastic plate15is used to prevent disengagement of the blade20form the mounting bracket10. However, in real operation, there are still some defects need to be improved:

First, after the blade20is mounted on the mounting bracket10, the rod portion142of the joints14abuts against the bottom221of the gap21of the holes22. In the meantime, a latch hook151of the elastic plate15abuts against a lower surface of the blade20, since the mounting bracket10and the blade20rotate cyclically, and the gap22of the respective holes21are directed along the long side of the blade20, a side222of the gap22and the rod portion142of the joints will apply forces to each other because of inertia, and the forces caused between the side222of the gap22and the rod portion142of the joints14will be the greatest just when the ceiling fan starts. In other words, the rod portion142of the joints14will abut against a side of the gap20, but not abuts against the bottom221of the gap22. After long time of usage, there will be gap appear between the rod portion142of the joints14and the gap22, meanwhile, the elastic plate51is susceptible to swing up and down due to being pressed by the rod portion142of the joints14, and thus, after a certain period, the latch hook151is unable to securely press against the lower surface of the blade20because of elastic fatigue. As a result, the rod portion142of the joints will probably be disengaged from the holes21of the blade20, which will further lead to a sever problem of the disengagement of the blade20from the mounting bracket10.

Second, noise is one of the main problems that most designers want to solve, the elastic plate15is used to reinforce the engagement between the mounting bracket10and the blade20, since the elastic plate15only has one latch hook151, there will be space appear between the latch hook151of the elastic plate15and the blade due to elastic fatigue or bad registration, and thus it will cause noise.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide a ceiling fan blade mounting assembly capable of preventing disengagement of the ceiling fan blade from mounting bracket during the rotation of the ceiling fan.

The secondary object of the present invention is to provide a ceiling fan blade mounting assembly capable of reducing the noise cause by the ceiling fan during operation.

In accordance with one aspect of the present invention, there is provided with a ceiling fan blade assembly, including: a mounting bracket has a positioning portion and a mounting portion, and an arm being disposed between the positioning portion and the mounting portion for connecting them together, the positioning portion is fixed to a ceiling fan's base body; plural fixing elements are secured on the mounting portion of the mounting bracket, one of the plural fixing elements located close to a position where the mounting portion and the arm are connected; an elastic plate has protrusive latch hooks located in symmetric manner, the elastic plate is fixed by the fixing elements and located close to the position where the arm and the mounting portion are connected, and two wing portions of each elastic plate are located at both sides of the arm of the mounting bracket; a ceiling fan blade is provided at an end thereof with plural holes, the holes each have a gap, and the gap of the respective holes are directed in the same direction.

The present invention will become more obvious from the following description when taken in connection with the accompanying drawings, which shows, for purpose of illustrations only, the preferred embodiment in accordance with the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring toFIGS. 3 and 4, a ceiling fan blade mounting assembly generally comprises a mounting bracket30, three fixing elements40, an elastic plate50and a ceiling fan blade60.

The mounting bracket30has a positioning portion31and a mounting portion32, and an arm33is disposed between the positioning portion31and the mounting portion32for connecting them together. Wherein the positioning portion31is fixed to a ceiling fan's base body, whereas the mounting portion32is defined on an upper surface thereof with three threaded holes321. One of the three threaded holes321is located close to the position where the arm33and the mounting portion32are connected.

The three fixing elements40each have a head portion41and a rod portion42. The rod portion42extends downward and is provided with a threaded section43to be screwed in the threaded holes32of the mounting bracket30. Furthermore, a soft washer44is mounted onto the rod portion42of the respective fixing elements40. The washer44has an engaging portion441, and an upper portion442and a lower portion443are respectively formed at both sides of the engaging portion441. The head portion41of the fixing elements40stops the upper portion442.

The elastic plate50, from the center outward, plural wing portions51are extended in symmetric manner, and the respective wing portions51tilt a little upward. Furthermore, the wing portions51each are folded upward to form a first latch hook52and a second latch hook53. The elastic plate50is fixed by the fixing elements40and located close to the position where the arm33and the mounting portion32are connected, and pressed by the lower portion443of the washer44. The two wing portions51of each elastic plate50are located at both sides of the arm33of the mounting bracket30.

The ceiling fan blade60is provided at an end thereof with three is holes61, the holes61each have a gap62, and the respective holes62are directed in the same direction. The fixing elements40are inserted in the corresponding holes61and then rotated at angle, so as to be positioned in the corresponding gap62. In the meantime, the first latch hook52of the elastic plate50abuts against the hole61of the ceiling fan blade60,20whereas a lower surface of the ceiling fan blade60presses against the second latch hook53. By such arrangements, the ceiling fan blade60can be securely mounted on the mounting bracket30.

Referring further toFIGS. 5–7, in order to mount the ceiling fan blade60onto the mounting bracket30, the respective holes61of the ceiling fan blade60should be initially aligned with the fixing elements40of the mounting bracket30, and make the head portion41of the fixing elements40and the upper portion442of the washer44locate at an upper surface of the ceiling fan blade60, whereas the rod portion42of the fixing elements40and the engaging portion441of the washer44are located in the holes61. And then rotate the ceiling fan blade60in counterclockwise relative to the mounting bracket30, so as to engage the rod portion42of the respective fixing elements40and the engaging portion441of the washer44in the gap62. In the meantime, the first latch hook52of the elastic plate50abuts closely against the hole61of the ceiling fan blade60, whereas a lower surface of the ceiling fan blade60presses against the second latch hook53. By such arrangements, the ceiling fan blade60can be securely mounted on the mounting bracket30.

In addition, since the gap62of the respective holes61are directed in the same direction, during the rotation of the mounting bracket30and the ceiling fan blade60, the rod portion42of the fixing elements40and the engaging portion441of the washer44will be pushed against a bottom621of the gap62because of inertia. Meanwhile, the elastic plate50securely abuts against the inner surface of the respective holes61of the ceiling fan blade60, the rod portion42of the fixing elements40and the engaging portion441of the washer44can be prevented from moving into the hole61from the gap62, such that the ceiling fan blade60is securely positioned.

It will be noted that the respective holes61of the ceiling fan blade60can be aligned with the fixing elements40and then the fixing elements40can be engaged in the gap62after an angle of rotation. In the meantime, the first latch hook52of the elastic plate50abuts closely against the inner surface of the hole61of the ceiling fan blade60, whereas the lower surface of the ceiling fan blade60presses against the second latch hook53. Such that the elastic plate50just acts like an arm so as to make the first latch hook52securely engage in the hole61, in this way, the ceiling fan blade60can be securely mounted on the mounting bracket30. Furthermore, since the ceiling fan blade60is securely mounted on the mounting bracket30, the noise can be reduced.

Three fixing elements40each have a head portion41and a rod portion42. The rod portion42extends downward and is provided with a threaded section43to be screwed in the threaded holes32of the mounting bracket30. Furthermore, a soft washer44is mounted onto the rod portion42of the respective fixing elements40. The washer44has an engaging portion441, and an upper portion442and a lower portion443are respectively formed at both sides of the engaging portion441. The head portion41of the fixing elements40stops the upper portion442.