Patent Application
20090025180
1. Field of the Invention
The present invention relates to a hinge assembly, and more particularly to a hinge assembly to attach a cover pivotally to a base of an electronic device.
2. Description of the Prior Arts
With reference to
The conventional hinge comprises a stationary leaf (51), a bushing (52) and a pivoting leaf (53).
The stationary leaf (51) is attached securely to the base (61) and has a distal end, a barrel housing (512) and a slot (513). The barrel housing (512) is formed in the distal end of the stationary leaf (51) and has an inside surface. The slot (513) is formed longitudinally on the inside surface of the barrel housing (512).
The bushing (52) is mounted securely in the barrel housing (512) and has a gudgeon, a channel (521) and a neck (522). The gudgeon is formed coaxially through the bushing (52). The channel (521) is formed longitudinally through the bushing (52) and communicates with the gudgeon and allows the bushing (52) to expand and fit tightly in the barrel housing. The neck (522) is formed longitudinally on the bushing and engages the slot (513) to securely mount the bushing (52) inside the barrel housing (512) of the stationary leaf (51).
The pivoting leaf (53) is securely mounted rotatably through the gudgeon of the bushing (52), is mounted securely on the cover (62) to allow the cover (62) to pivot relative to the base (61) and has a proximal end, a distal end, a mounting leaf (531) and a pintle (532). The mounting leaf (531) is formed on the distal end and attaches securely to the cover (61). The pintle is formed on the proximal end of the pivoting leaf (53) and is mounted rotatably through the gudgeon of the bushing (52), causing the bushing to expand and hold the hinge assembly securely together.
However, electronic devices are designed thinner and lighter for convenience and the neck of the conventional hinge prevents further downscaling and weight reduction. That limits how thin the electronic device may be. To overcome the shortcomings, the present invention provides a hinge assembly to mitigate or obviate the aforementioned problems.
The primary objective of the present invention is to provide a hinge assembly that uses less material so is small and light.
A hinge assembly attaches a cover pivotally to a base of an electronic device and has a stationary leaf, a bushing and a pivoting leaf. The stationary leaf is attached to the base and has a barrel and at least one slot. Each slot is formed in the barrel. The bushing is mounted in the barrel and has two end edges and at least one tab. Each tab is formed from the bushing near the corresponding end edge and is mounted in the corresponding slot. The pivoting leaf is mounted rotatably in the bushing and attaches to the cover. Consequently, the hinge has a small bushing and uses less material so reducing the size and weight of the hinge assembly, and the same of the electronic device.
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.
With reference to
The stationary leaf (10) is attached securely to the base (71) of the electronic device and has a distal end, a barrel (15), an optional channel (12), at least one slot (13) and an optional limiting protrusion (14).
The barrel (15) has a mounting hole (11), an inner surface and two end edges. The mounting hole (11) is formed coaxially through the barrel (15).
The channel (12) is formed longitudinally through the inner surface and the end edges of the barrel and communicates with the mounting hole (11).
The at least one slot (13) is formed longitudinally in the inside surface and through the end edges of the barrel (15) and communicates with the mounting hole (11).
The limiting protrusion (14) is formed on the corresponding end edge of the barrel (15).
The bushing (20) is mounted securely in the mounting hole (11) and has two end edges, a gudgeon (21), a slit (22) and at least one tab (23).
The gudgeon (21) is formed coaxially through the bushing (20).
The slit (22) is formed longitudinally through the bushing (20) to allow the bushing (20) to be expanded to fit tightly in the barrel (15) and may correspond to and align with the channel (12).
Each tab (23) is formed from the bushing (20) adjacent to the slit (22), near the corresponding end edge of the bushing (20), is formed by cutting transversely and bending the corresponding end edge of the bushing (20) and is mounted securely in the corresponding slot (13) to hold the bushing (20) securely.
The pivoting leaf (30) is mounted rotatably and tightly in the gudgeon (21) of the bushing (20), abuts the corresponding end edge of the barrel (15), is attached securely to the cover (72) to allow the cover (72) to pivot relative to the base (71) and has a proximal end, a body (31), a pintle (32) and an optional positive stop (33).
The body (31) has a proximal end, an out side wall, an optional keyed hole (311), an optional stop hole (312) and a mounting leaf (313). The keyed hole (311) is formed longitudinally in the proximal end of the body (31) and is non-circular in cross-section. The stop hole (312) is formed longitudinally in the proximal end of the body (31). The mounting leaf (313) is formed on and protrudes from the out side wall of the body (31) and attaches securely to the cover (72) to mount the pivoting leaf (30) on the cover (72).
The pintle (32) extends from the proximal end of the pivoting leaf (30), is mounted tightly but rotatably in the gudgeon (21), expands the bushing (20) to fit the bushing (20) tightly in the barrel (15) and may have a keyed inner end. The keyed inner end of the pintle (32) corresponds to and is mounted securely in the keyed hole (311).
The positive stop (33) extends from the proximal end of the pivoting leaf (30), corresponds to and selectively abuts the limiting protrusion (14) to limit the movement of the pivoting leaf (30) relative to the stationary leaf (10) and may be mounted securely in the stop hole (312).
Therefore, the tab (23) formed by cutting and bending the bushing (20) itself allows the hinge assembly to have a downscaled bushing (20) and uses less material so reduces the size and weight of the hinge assembly. Consequently, the hinge assembly is cheaper and allows electronic devices to be smaller and lighter.
Even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and features of the invention, the disclosure is illustrative only. Changes may be made in the details, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
