Patent Application
20090049644
1. Field of the Invention
The present invention relates to a hinge assembly, more particularly to a hinge assembly for a portable computer.
2. Description of the Related Art
Taiwan Pat. No. M305374 disclose a hinge assembly having the advantage of automatic locking, but it suffers several problems. One problem is that a computer or the like with this hinge assembly can not open/close with satisfactory steadiness and to be firmly remained in a static position. Another problem is that lubricant can not be transferred efficiently.
The present invention is, therefore, intended to obviate or at least alleviate the problems encountered in the prior art.
A multi-stage hinge assembly includes a first coupling member adapted to fix with a portable computer and receive with a second coupling member, a plurality of support members, a first positioning member, a plurality of resilient frictional devices, a second positioning member, a first position limiting member, a second position limiting member and a retainer. The retainer is adapted to prevent the second coupling member, the plurality of support member, the first positioning member, the plurality of resilient frictional devices, and the second positioning member, the first position limiting member and the second position limiting member from disengaging with the first coupling member.
The second coupling member includes a first engagement portion pivotally mounted on the first coupling member and a second engagement portion adapted to fix with a portable computer.
The plurality of support members are pivotally mounted on the first coupling member and are engaged with the second coupling member.
The first positioning member defines a first contacting surface with a plurality of radially disposed gripping blocks formed thereon. Each gripping block is arcuate and has the same radius of curvature. Furthermore, each gripping block is disposed at different distances with respect to the first coupling member.
The resilient frictional devices are installed between the first positioning member and the retainer. Each resilient frictional device is separated by one support member.
The second positioning member defines a first contacting surface with a plurality of positioning slots corresponding with the plurality of gripping blocks. Each gripping block is adapted to complemently fit into the corresponding position slot and move in the positioning slot and on the first contacting surface of the second positioning member.
The first position limiting member is mounted on the first coupling member and includes a plurality of V-shaped lubricant holes for allowing lubricant to flow past the first position limiting member. The plurality of lubricant holes are grouped in pairs, with each pair including two lubricant holes having their open ends extending oppositely from each other and with each pair being disposed radially about the hole.
The second position limiting member is pivotally mounted on the first coupling member and includes a plurality of V-shaped lubricant holes. The lubricant holes are also grouped in pairs, with each pair including two lubricant holes having their open ends extending oppositely from each other. Furthermore, the second position limiting member includes a projection moveable within the position limiting area. The position limiting area is adapted to limit pivoting movement of the second position limiting member.
One objective of this invention is that the first positioning member and the second positioning member are adapted to provide differential frictional forces.
Another objective of this invention is that the plurality of the V-shaped lubricant holes are adapted to maintain lubricant between the first positioning limiting member and the second positioning limiting member regardless the second coupling member is rotated clockwise/anticlockwise with the first coupling member.
Yet another objective of this invention is to provide the plurality of resilient frictional devices and support members for allowing the portable computer or the like to open/close with greater steadiness and to be firmly remained in a static position.
Other objectives, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
Referring to
A second coupling member 20 is pivotally mounted on the first coupling member 10. The second coupling member 20 includes a first engaging portion 21 having an orifice 24 adapted to allow the insertion of the first coupling member 10, a second engagement portion 22 adapted to fix with the portable computer or the like and a slot 23. In this preferred embodiment, the second engagement portion 22 includes a tongue 221 formed thereon.
A plurality of support members 25 are pivotally mounted on the first coupling member 10 to allow a stable rotational movement of the second coupling member 20 with respect to the first coupling member 10. Each support member 25 includes a hole 251 adapted to allow the insertion of the first coupling member 10 and a recess 252 adapted to engage with the tongue 221 of the second engagement portion 22. Accordingly, when the second coupling member 20 is rotated with respect to the first coupling member 10, the plurality of support members 25 are jointly pivoted with respect to the first coupling member 10.
A first positioning member 30 is mounted on the first coupling member 10. The first positioning member 30 includes a bore 31 adapted to allow the insertion of the first coupling member 10. The bore 31 is shaped to have two perimeters matching the first receiving surfaces 14 and two perimeters matching the second receiving surface 17. In this case, the first positioning member 30 is restricted from rotating with respect to the first coupling member 10.
The first positioning member 30 also includes a first contacting surface 301 formed thereof. In this preferred embodiment, the first contacting surface 301 has three radially disposed gripping blocks 32 formed thereon. Each gripping block 32 is arcuate and has the same radius of curvature, but is distanced differently with respect to the bore 31. In addition, each gripping block 32 includes two second contacting surfaces 321 and a third contacting surface 322, with each second contacting surface 321 being equally spaced from and contiguously connected to the third contacting surface 322 by a sloped surface (not numbered). Each second contacting surface 321 also has another sloped surface (not numbered) contiguous connected thereto.
A plurality of resilient frictional devices 40 is also mounted on the first coupling member 10. Each resilient frictional device 40 is comprised of two spacers 41 and at least one resilient member 42 installed therebetween. Each spacer 41 has a bore 411 adapted to allow the insertion of the first coupling member 10 and a plurality of lubricant holes 412 for allowing lubricant to flow past the spacer 41. In this embodiment, each spacer 41 has three lubrication holes 412 formed thereon. The bore 411 is shaped to have two perimeters matching the first receiving surfaces 14 and two perimeters matching the second receiving surface 17. In this case, the first positioning member 30 is restricted from rotating with respect to the first coupling member 10. Each resilient member 42 has a hole 421 adapted to allow the insertion of the first coupling member 10 and a plurality of dents 422 formed in the perimeter wall thereof. In this preferred embodiment, the resilient member 42 has four dents 422 formed on the perimeter thereof.
A second position member 50 is pivotally mounted on the first coupling member 10. The second position member 50 includes a hole 51 adapted to allow the insertion of the first coupling member 10 and a protrusion 52 adapted to engage in the slot 23 of the second coupling member 20. Accordingly, when the second coupling member 20 is rotated with respect to the first coupling member 10, the second position member 50 is jointly pivoted with respect to the first coupling member 10. The second position member 50 also includes a ridge 53 adapted to be received in the orifice 24. Moreover, the second position member 50 includes a first contacting surface 501 formed thereof for interacting with the first contacting surface 301 of the first position member 30. In this preferred embodiment, the first contacting surface 501 has three positioning slots 54 corresponding to the gripping blocks 32 such that the gripping blocks 32 are moveable in and out of the respective positioning slots 54 when the second position member 50 is pivoted with respect to the first coupling member 10. Furthermore, each positioning slot 54 is arcuate and has the same radius of curvature, but is distanced differently with respect to the bore 31. Each positioning slot 54 includes two second contacting surface 541 and a third contacting surfaces 542, with each second contacting surface 541 being equally spaced from and contiguously connected to the third contacting surface 542 by a sloped surface (not numbered). Each second contacting surface 541 also has another sloped surface (not numbered) contiguous connected thereto.
A first position limiting member 60 is also mounted on the first coupling member 10. The first position limiting member 60 includes a hook 61 adapted to engage the cutout 13, a hole 64 adapted to allow the insertion of the first coupling member 10 and a plurality of V-shaped lubricant holes 62 for allowing lubricant to flow past the first position limiting member 60. The plurality of lubricant holes 62 are grouped in pairs, with each pair including two lubricant holes 62 having their open ends extending oppositely from each other and with each pair being disposed radially about the hole 64. The first position limiting member 60 also includes a position limiting area 63 along a portion of the perimeter thereof.
A second position limiting member 70 is pivotally mounted on the first coupling member 10. The second position limiting member 70 includes a hole 71 adapted to allow the insertion of the first coupling member 10 and a boss 72 adapted to engage in the slot 23 of the second coupling member 20. Accordingly, when the second coupling member 20 is rotated with respect to the first coupling member 10, the second position limiting member 70 is jointly pivoted with respect to the first coupling member 10. The second position limiting member 70 also includes a ridge 73 adapted to be received in the orifice 24. Moreover, the second position limiting member 70 includes a plurality of V-shaped lubricant holes 74 arranged radially about the hole 71. The plurality of lubricant holes 74 are also grouped in pairs, with each pair including two lubricant holes 74 having their open ends extending oppositely from each other. Furthermore, the second position limiting member 70 includes a projection 75 moveable within the position limiting area 63. The position limiting area 63 is adapted to limit pivoting movement of the second position limiting member 70.
As a first step in assembling the multi-hinge assembly, the first positioning limiting member 60 is moved into the first receiving surface 14 and the second receiving surface 17 until the hook 61 lockably engages the cutout 13, the second position limiting member 70 is then moved into the first receiving surface 14 and the second receiving surface 17 and pressed by the first positioning limiting member 60, the second coupling member is then moved into the first receiving surface 14 and the second receiving surface 17 and pressed against the second position limiting member 70, the second positioning member is then moved into the first receiving surface 14 and the second receiving surface 17 until the ridge 53 engages in the orifice 24, the first positioning member 30 is then moved into the first receiving surface 14 and the second receiving surface 17 until the gripping blocks 32 complemently fits into the corresponding positioning slots 54, one of the plurality of resilient frictional devices 40 is then moved into the first receiving surface 14 and the second receiving surface 17 and pressed against the first positioning member 30, and one of the plurality of support members 25 is then moved into the first receiving surface 14 and the second receiving surface 17 and pressed against the aforementioned resilient frictional device 40. The plurality of resilient frictional devices 40 and the plurality of support members 25 are arranged in this way to provide a biasing force acting upon the first positioning member 30. A retainer 16 is then used to engage the engaging portion 15.
Referring to
In view of forgoing, it is an advantage of the present invention that the first positioning member 30 and the second positioning member 50 are adapted to provide differential frictional forces.
Another advantage of the present invention is that the plurality of the V-shaped lubricant holes 62, 74 are adapted to maintain lubricant between the first positioning limiting member 60 and the second positioning limiting member 70 regardless the second coupling member 20 is rotated clockwise/anticlockwise with the first coupling member 10.
Yet another advantage of the present invention is to provide the plurality of resilient frictional devices 40 and support members 25 for allowing the portable computer or the like to open/close with greater steadiness and to be firmly remained in a static position.
While the specific embodiments have been illustrated and described, numerous modifications come to mind without significantly departing from the spirit of invention and the scope of invention is only limited by the scope of accompanying claims.
