AU2013100480A4

AU2013100480A4 - Blind reel fixing assembly having multi-stage adjustable lengths

Info

Publication number: AU2013100480A4
Application number: AU2013100480A
Authority: AU
Inventors: Wen-Yu Wu
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-04-12
Filing date: 2013-04-12
Publication date: 2013-05-09
Anticipated expiration: 2021-04-12

Abstract

A blind reel fixing assembly having multi-stage adjustable lengths is revealed, comprising a shell sleeve having an opening, a multi-stage length adjustable component having a guiding hole, and a core component having an extruded axle. The multi-stage adjustable component is installed at the opening of the shell sleeve and can be rotated relative to the shell sleeve. The core component is inserted into the shell sleeve to realize an axial movement inside the shell sleeve by a spring component to make the extruded axle retractable inside the guiding hole. Therein, the core component has a supporting extruded point, an internal sleeve of the multi-stage adjustable component is formed as a continuous wavy ring where a first contact notch, a second contact notch and a third contact notch are disposed at the different heights of the wavy ring to position the supporting extruded point so that the extruded axle is operated in non-extruded, half-extruded and fully-extruded statuses from the guiding hole when the multi-stage length-adjustable component is repeatedly rotated. C:) t, CY'D cy:) r--A CeD ce:) -. 4 cq m cq Ln C=) cq = I c"I r cq C-0 cq

Description

BLIND REEL FIXING ASSEMBLY HAVING MULTI-STAGE ADJUSTABLE LENGTHS FIELD OF THE INVENTION The present invention is related to a blind reel fixing assembly implemented to fix one end of a blind reel, and more specifically to a blind reel fixing assembly having multi-stage adjustable lengths. BACKGROUND OF THE INVENTION Both ends of a blind reel were fixed on corresponding racks, however, when corresponding racks are installed inside a building where the distance between the corresponding racks is longer than the installable length of a blind reel, then a blind reel can not be installed. Moreover, a blind reel is frequently installed and uninstalled for cleaning or replacement, therefore, retractable blind reel fixing assembly having a length-adjustable extruded axle must be installed at both ends of a blind reel. Usually, a conventional blind reel fixing assembly has only one-stage adjustable length where the extruded axle can be either retracted or extruded. Another conventional blind reel fixing assembly is revealed by Licciardi di Stefano and Carmelo Joseph in US Patent No. 2010/0200179 entitled "idler" which is the same patent of Australian Innovation application number 2010100126 Invention entitled "An idler", where the idler has an extruded axle having multi-stage adjustable lengths. However, the adjustable driving wheel has issues of sticking and broken teeth. The main mechanism components includes a housing and a driving member fitted to the housing. A core component in the housing includes a core portion for engaging the driving member and a support portion shaped as the extruded axle for supporting a blind reel to fix to a rack. The selective adjustment of the drive member relative to the housing moves the core member with the support portion along an axis to different positions relative to the housing, wherein at each position, the driving member engages the core member to resist the movement of the core member along the axis from the position relative to the housing. The driving member includes a spiral path to join to the core member leading to issues of sticking and broken teeth. SUMMARY OF THE INVENTION The main purpose of the present invention is to provide a blind reel fixing assembly having multi-stage adjustable lengths to achieve rotational multi-stage continuously adjustable extruded lengths of the extruded axle without sticking issues. According to the present invention, a blind reel fixing assembly having multi-stage adjustable lengths is revealed, comprising a shell sleeve having an opening, a multi-stage length-adjustable component having a guiding hole, and a core component having an extruded axle. The multi-stage adjustable component is installed at the opening of the shell sleeve and can be rotated relative to the shell sleeve. The core component is inserted into the shell sleeve to realize an axial movement inside the shell sleeve by a spring component to make the extruded axle retractable inside the guiding hole wherein the core component has a supporting extruded point and an internal sleeve of the multi-stage adjustable component is formed as a continuous wavy ring wherein a first contact notch, a second contact notch and a third contact notch are disposed at the different heights of the wavy ring to position the supporting extruded point so that the extruded axle is operated in non-extruded, half-extruded and fully-extruded statuses from the guiding hole when the multi-stage length-adjustable component is repeatedly rotated. DESCRIPTION OF THE DRAWINGS FIG. 1 is a three-dimensional perspective view of a blind reel fixing assembly having multi-stage adjustable lengths according to the preferred embodiment of the present invention. FIG. 2 is a three-dimensional perspective view of the blind reel fixing assembly installed at a blind reel according to the preferred embodiment of the present invention. FIG. 3 is a three-dimensional component disassembly perspective view of the blind reel fixing assembly according to the preferred embodiment of the present invention. FIG. 4 is a partial cross-sectional view of the core component and the shell sleeve of 2 the blind reel fixing assembly according to the preferred embodiment of the present invention. FIG. 5 is a partial three-dimensional view of the multi-stage length-adjustable component of the blind reel fixing assembly according to the preferred embodiment of the present invention. FIGS. 6A and 6B are partially cross-sectional and three-dimensional views of the blind reel fixing assembly to show in a non-extruded status of the extruded axle according to the preferred embodiment of the present invention. FIGS. 7A and 7B are partially cross-sectional and three-dimensional views of the blind reel fixing assembly to show in a half-extruded status of the extruded axle according to the preferred embodiment of the present invention. FIGS. 8A and 8B are partially cross-sectional and three-dimensional views of the blind reel fixing assembly to show in a fully-extruded status of the extruded axle according to the preferred embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION With reference to the attached drawings, the present invention is described by means of the embodiment(s) below where the attached drawings are simplified for illustration purposes only to illustrate the structures or methods of the present invention by describing the relationships between the components and assembly in the present invention. Therefore, the components shown in the figures are not expressed with the actual numbers, actual shapes, actual dimensions, nor with the actual ratio. Some of the dimensions or dimension ratios have been enlarged or simplified to provide a better illustration. The actual numbers, actual shapes, or actual dimension ratios can be selectively designed and disposed and the detail component layouts may be more complicated. According to the preferred embodiment of the present invention, a blind reel fixing assembly 100 having multi-stage adjustable lengths is illustrated in FIG. 1 for 3 three-dimensional perspective view, in FIG. 2 for a three-dimensional perspective view installed at a blind reel 10, and in FIG. 3 for a three-dimensional component disassembly perspective view. The blind reel fixing assembly 100 comprises a shell sleeve 110, a multi-stage length-adjustable component 120 having a guiding hole 121, and a core component 130 having an extruded axle 131. The blind reel fixing assembly 100 is installed at one end of the blind reel 10 where the other end of the blind reel 10 is jointed to a driving wheel 11 connecting to the blind cord where the blind reel fixing assembly 100 serves as a passive idle gear. The driving wheel 11 is configured for fixing at the first rack 12 and the blind reel fixing assembly 100 is configured for fixing at the second rack 13 where the blind reel fixing assembly 100 has an adjustable extruded axle 131 with multi-stage adjustable lengths to overcome the distance variation between the first rack 12 and the second rack 13. Therein, the core component 130 and the shell sleeve 110 are shown in FIG. 4 for a partial cross-sectional view and the multi-stage length adjustable component 120 is illustrated in FIG. 5 for a partial three-dimensional view. The shell sleeve 110 has an opening 111 which can be a cylindrical housing where a spring component 140 and the core component 130 are installed inside the cylindrical housing. A plurality of external costal fixing bars 117 are disposed on the external sidewalls of the cylindrical housing so that the shell sleeve 110 can be inlaid and fixed inside the blind reel 10. The multi-stage length-adjustable component 120 is jointed to the opening 111 of the shell sleeve 110 and can be rotated and move relative to the shell sleeve 110. Usually, an external portion of the multi-stage length-adjustable component 120 exposed from the shell sleeve 110 can be a turntable with a roughing surface as shown from FIG. 1 to FIG. 3 where the edges of the multi-stage length-adjustable component 120 are formed into saw-toothed wheel with roughed surfaces 123 to rotate the multi-stage length-adjustable component 120. Furthermore, as shown from FIG. 3 to FIG. 5, the shell sleeve 110 has a plurality of locking holes 114 adjacent to the opening 111 and the 4 multi-stage length-adjustable component 120 has an anti-release ring groove 122 where a plurality of locking pins 170 are inserted through the locking holes 113 and extruded into the anti-release ring groove 122 as shown in FIG. 6A to prevent the separation of the multi-stage length-adjustable component 120 and the shell sleeve 110 when rotation of the multi-stage length-adjustable component 120, moreover, the multi-stage length-adjustable component 120 can freely rotate relative to the shell sleeve 110 in a clockwise direction or in a counterclockwise direction. The core component 130 is inserted into the shell sleeve 110 where the core component 130 has a supporting extruded point 132. The extruded axle 131 extends and retracts from the guiding hole 121 as shown in FIG. 1 through a spring component 140 disposed inside the shell sleeve 110 to move the core component 130 in the axial direction. In the present embodiment, the core component 130 includes an internal sleeve 133 and a core axle 134 placed in the internal sleeve 133. Preferably, the internal sleeve 133 and the core axle 134 can easily be disassembled without gearing or fixing connection. The supporting extruded point 132 is located on the external sidewalls of the internal sleeve 133. Moreover, the extruded axle 131 is formed at one end of the core axle 134 to extrude from the internal sleeve 133. Therefore, the core axle 134 can be made of more rigid metal than the internal sleeve 133 where the core axle 134 has a simple shape without milled slots or extruded bars on the sidewalls for easy manufacture. The core axle 134 can be installed inside the internal sleeve 133 where the extruded axle 131 of the core axle 134 can be extruded from one axle hole 136 of the internal sleeve 133 as shown in FIG. 4 and FIG. 8B, so that the rotation of the core axle 134 will not be limited by the internal sleeve 133. In the present embodiment, a plurality of costal bars 135 are disposed on the external sidewalls of the internal sleeve 133 where the internal sidewalls of the shell sleeve 110 has a plurality of corresponding guiding fillisters 112 as shown in FIG. 4. Therefore, the internal sleeve 133 with the supporting extruded point 132 will not be rotated when the multi-stage length-adjustable component 120 rotates. 5 However, the internal sleeve 133 and the core axle 134 will move back and forth in the axial direction when the multi-stage length-adjustable component 120 is in continuous rotation. Preferably, the diameter of the guiding hole 121 of the multi-stage length-adjustable component 120 is corresponding to the external sidewalls of the internal sleeve 133 so that the front end of the internal sleeve 133 can be moved in the guiding hole 121 to effectively keep the axial movement of the internal sleeve 133. Furthermore, the spring component 140 is normally a compression spring where one end of the spring component 140 elastically presses at the bottom of the core axle 134 with a stopping ring away from the extruded axle 131. The other end of the spring component 140 elastically presses the internal bottom surface of the shell sleeve 110 opposing to the opening 111. Preferably, the internal bottom surface of the shell sleeve 110 has a positioning post 115 (as shown in FIG. 4) to hold and position the spring component 140. Preferably, a through hole 116 is formed to penetrate through the center of the positioning post 115 to prevent unbalanced internal and external pressures of the shell sleeve 110 which will affect the rotational adjustment of the multi-stage length-adjustable component 120 and to prevent broken teeth. As shown in FIG. 4, an extruded point holding slot 113 is disposed at the internal sidewalls of the shell sleeve 110 so that the supporting extruded point 132 of the internal sleeve 133 can further be moved deeper into the shell sleeve 110 at the axial movement of the internal sleeve 133. Preferably, one of the locking holes 114 is aligned to the exiting end of the extruded point holding slot 113 to prevent the internal sleeve 133 from suddenly springing out due to the elastic force of the spring component 140 when disassembly the multi-stage length-adjustable component 120 and to prevent from extra friction against the multi-stage length-adjustable component 120 when the rotation of the multi-stage length-adjustable component 120. Furthermore, the multi-stage length-adjustable component 120 has an internal plugging portion plugging in the opening 111 and installed inside the shell sleeve 110 to 6 form a continuous wavy ring 150 where a first contact notch 151, a second contact notch 152, and a third contact notch 153 are disposed on the continuous wavy ring 150 at different heights relative to the rotational wheel surface to provide contacting alignment for the supporting extruded point 132 so that the extruded axle 131 is operated in non-extruded, half-extruded and fully-extruded statuses when the multi-stage length-adjustable component 120 is repeatedly rotated. More detailedly, the supporting extruded point 132 has an arc side, and wherein the first contact notch 151, the second contact notch 152 and the third contact notch 153 have a plurality of arc edges to make the multi-stage length-adjustable component 120 be smoothly rotated. In the present embodiment, the continuous wavy ring 150 specifically has a first half wave 161 and the second half wave 162 where the first half wave 161 and the second half wave 162 have a same height. The first contact notch 151 is located at a wave peak between the first half wave 161 and the second half wave 162. The second contact notch 152 is located at the middle of the first half wave 161 or/and the second half wave 162, and the third contact notch 153 is located at a wave trough between the first half wave 161 and the second half wave 162. To be more specific, the wave length of the first half wave 161 is the same as the wave length of the second half wave 162. The first half wave 161 can combine with the second half wave 162 to make the continuous wavy ring 150 be a single wave to reduce the wave slope of the first half wave 161 and the second half wave 162 and have a larger amplitude so as to further reduce the rotational forces needed to adjust the multi-stage length-adjustable component 120. As shown in FIG. 6A and FIG. 6B, the extruded axle 131 of the blind reel fixing assembly 100 is operated in non-extruded status. When the multi-stage length-adjustable component 120 is freely rotated clockwise or counterclockwise, the supporting extruded point 132 might be aligned with and in contact with the first contact notch 151. Since the first contact notch 151 is located at a wave peak between the first half wave 161 and the second half wave 162, therefore, the spring component 140 will 7 have the maximum compressive distance and the core component 130 will fully retract into the shell sleeve 110 where the extruded axle 131 will not extrude from the guiding hole 121. As shown in FIG. 7A and FIG. 7B, the extruded axle 131 of the blind reel fixing assembly 100 is operated in half-extruded status. When the multi-stage length-adjustable component 120 is freely rotated clockwise or counterclockwise, the supporting extruded point 132 might be aligned with and in contact with the second contact notch 152. Since the second contact notch 152 is located at the middle of the first half wave 161 or/and the second half wave 162 with a smaller height, therefore, the spring component 140 will have certain compressive distance and the core component 130 will half-retract into the shell sleeve 110 where the extruded axle 131 will also half-extrude from the guiding hole 121. As shown in FIG. 8A and FIG. 8B, the extruded axle 131 of the blind reel fixing assembly 100 is operated in fully-extruded status. When the multi-stage length-adjustable component 120 is freely rotated clockwise or counterclockwise, the supporting extruded point 132 might be aligned with and in contact with the third contact notch 153. Since the third contact notch 153 is located at the trough between the first half wave 161 and the second half wave 162, therefore, the spring component 140 will have the minimum compressive distance and the core component 130 will be completely pushed toward the multi-stage length-adjustable component 120 where the extruded axle 131 will fully-extrude from the guiding hole 121. Therefore, the present invention provides a blind reel fixing assembly 100 to achieve rotational multi-stage continuously adjustable extruded lengths of the extruded axle without sticking issues The above description of embodiments of this invention is intended to be illustrative but not limited. Other embodiments of this invention will be obvious to those skilled in the art in view of the above disclosure which still will be covered by and within the scope 8 of the present invention even with any modifications, equivalent variations, and adaptations. 9

Claims

1. A blind reel fixing assembly comprising: a shell sleeve having an opening; a multi-stage length-adjustable component installed at the opening of the shell sleeve and rotated relative to the shell sleeve, wherein the multi-stage length-adjustable component has a guiding hole; and a core component having an extruded axle and inserted into the shell sleeve to realize an axial movement by a spring component inside the shell sleeve to make the extruded axle retractable inside the guiding hole; wherein the core component has a supporting extruded point, and an internal sleeve of the multi-stage adjustable component is formed as a continuous wavy ring wherein a first contact notch, a second contact notch and a third contact notch are disposed at a plurality of different heights of the wavy ring to position the supporting extruded point so that the extruded axle is operated in non-extruded, half-extruded and fully-extruded statuses from the guiding hole when the multi-stage length-adjustable component is repeatedly rotated.

2. The blind reel fixing assembly as claimed in claim 1, wherein the continuous wavy ring has a first half wave and a second half wave, wherein the first half wave and the second half wave have a same height, the first contact notch is located at a wave peak between the first half wave and the second half wave, the second contact notch is located at a middle of the first half wave or the second half wave, and the third contact notch is located at a wave trough between the first half wave and the second half wave.

3. The blind reel fixing assembly as claimed in claim 1, wherein the core component includes an internal sleeve and a core axle, wherein the supporting extruded point is located on an external sidewall of the internal sleeve, and the extruded axle is formed 10 at one end of the core axle.

4. The blind reel fixing assembly as claimed in claim 3, wherein the shell sleeve has a plurality of locking holes adjacent to the opening, and the multi-stage length-adjustable component has an anti-release ring groove, wherein a plurality of locking pins are inserted through the locking holes and extruded into the anti-release ring groove to prevent the separation of the multi-stage length-adjustable component and the shell sleeve, wherein an extruded point holding slot is disposed at the internal sidewalls of the shell sleeve for accommodating the supporting extruded point for the axial movement of the internal sleeve, and one of the locking holes is aligned to the exiting end of the extruded point holding slot.

5. The blind reel fixing assembly as claimed in claim 1, wherein the internal bottom surface of the shell sleeve has a positioning post to hold and position the spring component, wherein a through hole is formed to penetrate through the center of the positioning post. 11