TWM467745U - Synchronous expansion and collapse device of expandable fan - Google Patents

Description

Expanding fan synchronous unfolding and folding device

The present invention relates to an unfolding fan, and more particularly to a synchronous unfolding device for deploying a fan.

A synchronizing and unfolding structure of a spreading fin fan disclosed in the Patent No. M387920 of the Republic of China, which mainly comprises a driving device, a plurality of casings, a plurality of connecting rods and a plurality of blades, wherein the driving device is provided outwardly a radially arranged support frame, and a pivot post is disposed at a near end of the support frame; a pivot hole corresponding to the pivot post is disposed at a center of the case, and the case is provided with three perforations around the pivot hole; the link The two joint sections are integrally formed at two ends of a connecting section, and the connecting rod section is provided with a corresponding perforating through hole, and the connecting rod is respectively provided with a through hole of the two ends and a perforation of two adjacent shells by two screws. One end of the fan blade is provided with a corresponding portion of the corresponding housing, and the combination portion is provided with a screwing hole corresponding to the pivoting hole, and the combined portion is provided with a screwing hole corresponding to the through hole for the screw to pass through the connecting rod The through hole and the housing are perforated and locked to the screw hole; accordingly, the housing is pivoted relative to the support frame by the connecting rod, and the fan blade and the housing are synchronously unfolded or folded.

The above-mentioned spread-wing fan synchronous unfolding and folding structure has the disadvantage that the connecting blades are synchronously linked or unfolded by the connecting rods, and the connecting structure has a plurality of components (links) and a plurality of pivoting points, once One of them If the structural deformation of the component or the pivoting function of one of the pivot points fails, the function of the synchronous linkage will be invalidated. In addition, the design change of the number of different blades and the different relative positions of the blades must be redesigned. The structural shape of each connecting rod can achieve the effect of synchronously interlocking the fan blades for unfolding and folding.

Therefore, the object of the present invention is to provide a synchronous unfolding and folding device for a fan which is simple in structure, smooth in transmission, and suitable for various fan blade numbers and combinations.

Therefore, the synchronous unfolding and folding device of the novel expansion fan comprises a lower turntable, a plurality of rotating shaft members, a driving belt member, and a plurality of fan blades.

The lower turntable includes a plurality of pivoting zones spaced about its axis. Each pivoting zone has a pivot hole and an arcuate guide hole. Each of the arcuate guide holes has a deployed end portion and a folded end portion.

The shaft members are rotatably disposed in the pivoting regions of the lower dial, respectively. Each of the rotating shaft members includes an upper end portion, a lower end portion pivotally disposed at a pivot hole of the corresponding pivoting portion, a gear portion, and a limit portion which is outwardly protruded and the outer end is slidably disposed in the arcuate guide hole Arm.

The belt member surrounds the shaft members and meshes with the gear portions of the shaft members.

The fan blades are respectively driven by the rotating shaft members, and each of the fan blades includes a connecting portion fixed to an upper end portion of the corresponding rotating shaft member.

The fan blades can be synchronously rotated between a folding position and a deployed position by the rotation of the shaft member and the belt member respectively. When the fan blades are rotated to the retracted position, the outer ends of the limiting arm portions of the rotating shaft members are located at the folding ends of the corresponding curved guiding holes, when the fan blades are rotated to the deployed position The outer ends of the limiting arm portions of the shaft members are located at the unfolded ends of the corresponding arcuate guide holes.

Preferably, the unfolding and folding device of the unfolding fan further comprises an upper turntable. The upper turntable is disposed between the lower turntable and the fan blades, and is parallel to the lower turntable, and is provided for pivoting the upper end portions of the rotating shaft members.

Preferably, the belt member is a time gauge belt.

Preferably, the fan blades do not overlap each other at the folding position.

The utility model has the advantages that the fan blades can be synchronously rotated between a folding position and a deployment position by the rotation of the shaft member and the belt member respectively, and the transmission member is simple, and the ring transmission mode is more traditional than the connecting rod transmission. Smooth, and suitable for a variety of fan blade number and combination type of expansion fan.

1‧‧‧ drive

2‧‧‧ Lower turntable

21‧‧‧ pivot zone

211‧‧‧ pivot hole

212‧‧‧Arc Guide Hole

213‧‧‧Expanded end

214‧‧‧Close end

3‧‧‧Upper turntable

4‧‧‧ shaft parts

41‧‧‧Bottom

42‧‧‧Upper end

43‧‧‧ Gear Department

44‧‧‧Limited arm

5‧‧‧Transmission belt parts

6‧‧‧fan blades

61‧‧‧Connecting Department

62‧‧‧fan blade holder

Other features and effects of the present invention will be apparent from the following detailed description of the preferred embodiments of the drawings, wherein: FIG. 1 is a perspective exploded view showing a comparison of the synchronous unfolding device of the present deployment fan. 2 is a perspective view showing a plurality of fan blades of the preferred embodiment in a folded position; FIG. 3 is a cross-sectional view taken along line III-III of FIG. 2; and FIG. 4 is a perspective view showing the same; The fan blades of the preferred embodiment are FIG. 5 is a plan view showing a combination of five blades in the preferred embodiment and in the folded position; and FIG. 6 is a plan view showing three preferred embodiments of the preferred embodiment. The combined pattern of the fan blades is at the collapsed position.

Referring to Figures 1, 2 and 3, a preferred embodiment of the synchronous unfolding and folding device of the present deployment fan is driven by a driving device 1 which is arranged in parallel spaced apart from each other and is driven by the driving device 1 The lower turntable 2 and an upper turntable 3, a plurality of rotating shaft members 4, a driving belt member 5, and a plurality of fan blades 6.

The lower turntable 2 includes a plurality of pivoting regions 21 spaced around its axis. Each of the pivoting regions 21 has a pivot hole 211 and an arcuate guide hole 212. Each of the arcuate guide holes 212 has a deployed end portion 213 and a folded end portion 214.

The shaft members 4 are rotatably disposed in the pivoting regions 21 of the lower turntable 2, respectively. Each of the shaft members 4 includes a lower end portion 41 pivotally disposed at a pivot hole 211 of the corresponding pivoting portion 21, an upper end portion 42 pivoted to the upper turntable 3, a gear portion 43, and an outwardly projecting portion The outer end slides on the limiting arm portion 44 in the curved guiding hole 212.

The belt member 5 surrounds the shaft members 4 and meshes with the gear portions 43 of the shaft members 4. In the preferred embodiment, the belt member is a time gauge belt.

The fan blades 6 are respectively driven by the shaft members 4, and Located above the upper turntable 3. Each of the blades 6 includes a connecting portion 61 that is fixed to the upper end portion 42 of the corresponding rotating shaft member 4. Preferably, the connecting portion 61 of each of the fan blades 6 is connected to the corresponding rotating shaft member 4 by a blade holder 62. The angle between the connected fan blades 6 and the rotating surface when the fan blades 6 are rotated can be adjusted by the respective blade holders 62.

The fan blades 6 can be synchronously rotated between a folding position (see FIG. 2) and a deployed position (see FIG. 3) by the rotation of the shaft member 4 and the belt member 5, respectively. When the fan is in a stationary state, the fan blades 6 are folded in the folding position and do not overlap each other, and the outer ends of the limiting arm portions 44 of the rotating shaft members 4 are located at the corresponding curved guiding holes 212. The end portion 214 is closed, and the user drives the driving device 1 to drive the lower and upper turntables 2, 3 to rotate, and rotates the centrifugal blades to rotate the respective blades 6 relative to the lower and upper turntables 2, 3 while passing through the belt member. 5 and the rotating shafts 4 synchronously drive the adjacent fan blades 6 to the deployed position. At this time, the outer ends of the limiting arm portions 44 of the rotating shaft members 4 are located at the unfolded ends of the corresponding curved guiding holes 212. Part 213.

When the user closes the driving device 1, each of the blades 6 rotates relative to the lower and upper turntables 2, 3 due to the inertial motion, and the adjacent driving blades 5 and the rotating shaft members 4 simultaneously drive the adjacent fan blades 6 to be engaged. To the collapsed position.

It is worth mentioning that, since the belt member 5 has flexibility, according to this, in addition to the gear portion 43 which can be engaged with the above-mentioned number four of the shaft members 4, the simultaneous deployment of the fan blades can be achieved. Efficacy, can also be engaged around different numbers and spatial distribution of the shaft parts (Figure 5 and Figure 6 In the same manner, the rotation of the shaft members 4 can be simultaneously driven to achieve the effect of rotating and connecting the fan blades 6 connected to each other for synchronous unfolding.

In summary, the fan blades 6 of the synchronous unfolding and folding device of the fan of the present invention can be synchronously rotated between a retracting position and a deployed position by the cooperation of the rotating shaft member 4 and the driving belt member 5, respectively. The transmission member is simple, and the ring transmission mode is smoother than the conventional link transmission, and is applicable to the fan blades of various fan blades and combinations. Further, the fan blades 6 rotate between the folding position and the deployment position. In the process of the present invention, the fan blades 6 do not collide with each other to cause noise and wear. In addition, the shaft members 4 are vertically pivoted on the lower and upper dials respectively. 2, 3, therefore, the shaft member 4 does not have the problem of left and right yaw rotation, thereby improving the stability of the synchronous rotation and the service life of the device, so the purpose of the present invention can be achieved.

However, the above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, that is, the simple equivalent changes and modifications made in accordance with the scope of the present patent application and the contents of the patent specification, All remain within the scope of this new patent.

1‧‧‧ drive

2‧‧‧ Lower turntable

212‧‧‧Arc Guide Hole

213‧‧‧Expanded end

214‧‧‧Close end

3‧‧‧Upper turntable

4‧‧‧ shaft parts

42‧‧‧Upper end

43‧‧‧ Gear Department

44‧‧‧Limited arm

5‧‧‧Transmission belt parts

6‧‧‧fan blades

Claims (5)

A synchronous unfolding and folding device for deploying a fan, comprising: a lower turntable comprising a plurality of pivoting regions spaced around the axis thereof; a plurality of rotating shaft members respectively rotatably disposed in the pivoting regions of the lower turntable, each of the rotating shafts The device includes an upper end portion, a lower end portion pivotally disposed at a pivot hole of the corresponding pivoting portion, and a gear portion; a belt member surrounding the shaft member and meshing with the gear portion of the shaft member; And the plurality of fan blades are respectively driven by the rotating shaft members, and each of the blades includes a connecting portion fixed to an upper end portion of the corresponding rotating shaft member; wherein the fan blades are respectively supported by the rotating shaft members The belt members are cooperatively rotatable in a retracted position and a deployed position. The synchronous unfolding and folding device of the unfolding fan according to claim 1, wherein each of the pivoting regions has a pivoting hole and an arcuate guiding hole, each of the arcuate guiding holes having a deployed end portion and a folding end portion Each of the shaft members further includes a limiting arm portion that protrudes outwardly and has an outer end slidably disposed in the arcuate guiding hole; wherein, when the fan blades are rotated to the retracting position, the rotation of the rotating shaft member is limited The outer end of the arm portion is located at the folded end of the corresponding curved guide hole, and when the fan blades are rotated to the deployed position, the outer end of the limiting arm portion of the rotating shaft member is located at the corresponding curved guide The expanded end of the hole. The synchronous unfolding and folding device of the unfolding fan according to claim 1, further comprising an upper turntable disposed between the lower turntable and the fan blades, and parallel to the lower turntable, and for the rotating shaft members The upper end portion is pivoted. A synchronous unfolding and folding device for an unfolding fan according to claim 1, wherein the belt member is a timing belt. The synchronous unfolding and folding device of the unfolding fan according to any one of claims 1 to 4, wherein the fan blades do not overlap each other at the folding position.