A foldable keyboard

Abstract

The invention is a folding keyboard, which includes a first keyboard, a first upper cover of the first keyboard covers a first base, the top surface of the first upper cover has a plurality of first keys, one side of a first rear side plate of the first base has a first extending and lowering component, the upper end of the first extending and lowering component is connected to a first rear side edge of the first upper cover, thereby driving the first rear side edge to move upward and expose a first heat dissipation hole on the first rear side plate; a second upper cover of the second keyboard covers a second base, the top surface of the second upper cover has a plurality of second keys, a second side of the second base is rotatably connected to the first side of the first base, one side of the second rear side plate has a second extending and lowering component, the upper end of the second extending and lowering component is connected to a second rear side edge of the second upper cover, thereby driving the second rear side edge to move upward.

Description

[Technical Field]

[0001] This work relates to a folding keyboard, particularly one that can be folded relative to each other and can be easily operated and have a better heat dissipation effect when flattened. [Previous Technology]

[0002] For traditional desktop computers, the keyboard is the most frequently used and primary input device. However, this commonly used traditional keyboard is fixed in size and not easy to carry, which is inconvenient for people who travel frequently. To address the above problems, as shown in patents CN117270698A, CN218728971U, TW582593U, and CN2593259Y, the main approach is to fold the long keyboard in half to reduce its length for portability, and to make it easy to operate after unfolding.

[0003] For example, as shown in the patent application CN117270698A, "A Composite Computer Input Keyboard", it mainly includes keyboard buttons, keyboard block one, a bottom plate and keyboard block two. The keyboard block one is provided with a folding mechanism on its outside. The folding mechanism includes a keyboard shaft one, a keyboard chain, a keyboard shaft three, a keyboard shaft four, a connecting buckle and a keyboard shaft two. The keyboard block one is rotatably connected to a second top shaft. A second connecting rod is fixedly connected to the second top shaft. The second connecting rod is rotatably connected to the outside of the bottom plate. A third connecting rod is slidably connected inside the second connecting rod. The third connecting rod is rotatably connected to the outside of the bottom plate. A fourth connecting rod is slidably connected outside the third connecting rod. A pull shaft is fixedly connected to the end of the fourth connecting rod away from the third connecting rod. The pull shaft is rotatably connected to an upper bottom plate. The keyboard block one is rotatably connected to a first top shaft. The upper bottom shaft one is rotatably connected to an upper bottom plate one. In this way, the keyboard can be easily disassembled, stored and carried.

[0004] With advancements in manufacturing technology, computer components are becoming increasingly miniaturized. Currently, there is a product called the Mini PC keyboard, which integrates at least one module required by the host computer, such as the central processing unit (CPU) / processor, within a foldable keyboard. It can be directly connected to an external display device to function as a desktop computer. However, although this device has a cooling fan installed inside the keyboard and ventilation holes on the bottom, its heat dissipation performance still needs improvement when the processor is used for extended periods or operates at high speeds. [Summary of the Invention]

[0005] In view of this, in order to provide a structure that is different from conventional technology and to improve the above-mentioned shortcomings, the creator has accumulated many years of experience and continuous research and development, resulting in this creation.

[0006] One of the purposes of this invention is to provide a folding keyboard that can solve the problem of heat dissipation when the CPU and other host modules are integrated into conventional folding keyboards and the processor is used for a long time or when it is running at high performance. By providing a first extension component and a second extension component on the rear side of the first keyboard and the second keyboard respectively, and providing heat dissipation holes on the rear side plate of the first base, the rear side of the first top cover can be raised after the first keyboard and the second keyboard are flattened, so that the first base exposes the first heat dissipation hole, and the rear side of the second top cover can be raised, which conforms to ergonomics, facilitates user operation, and ensures heat dissipation.

[0007] To achieve the above-mentioned creative purpose, the folding keyboard of this invention mainly includes a first keyboard and a second keyboard. The first keyboard includes a first top cover and a first base. The first top cover covers the first base, and the top surface of the first top cover has a plurality of first keys. The first base has a first side and a first rear side plate perpendicular to the first side. The first rear side plate has a first heat dissipation hole. One side of the first rear side plate has a first extension component. The upper end of the first extension component is connected to a first rear side of the first top cover, so as to drive the first rear side to move upward and expose the first heat dissipation hole. The second keyboard includes a second top cover and a second base. The second top cover covers the second base, and the top surface of the second top cover has a plurality of second keys. The second base has a second side and a second rear side plate perpendicular to the second side. The second side is connected to the first side of the first base in a relatively rotatable manner, so as to allow the first keyboard and the second keyboard to fold relative to each other. One side of the second rear side plate has a second extension component. The upper end of the second extension component is connected to a second rear side of the second top cover, so as to drive the second rear side to move upward.

[0008] In implementation, the first rear side of the first upper cover has a first rear side upright plate, which overlaps the first rear side plate; the second rear side of the second upper cover has a second rear side upright plate, which overlaps the second rear side plate, and the second rear side plate has a second heat dissipation hole.

[0009] In implementation, the first base has a first fan inside, the first fan has a first air inlet and a first air outlet, the first air outlet is connected to a first heat dissipation hole to exhaust the hot air inside the first keyboard; the second base has a second fan inside, the second fan has a second air inlet and a second air outlet, the second air outlet is connected to a second heat dissipation hole to exhaust the hot air inside the second keyboard.

[0010] In practice, the invention further includes an elongated base, with a first pivot and a second pivot on each of the shorter sides of the elongated base. A first pivot is provided on the first side of the first base, and the first pivot is pivotally connected to the first pivot via at least one first pivot. A second pivot is provided on the second side of the second base, and the second pivot is pivotally connected to the second pivot via at least one second pivot, so that the first keyboard and the second keyboard can be rotated and folded relative to each other.

[0011] In practice, the invention further includes an elongated base, with a first pivot and a third pivot on one side of the elongated base in the short direction; the first extension and lowering assembly includes a first connecting rod, a second connecting rod and a first long support, with a first pivot on one side of the first top cover, the first pivot being pivotally connected to the first pivot via at least one first pivot; one end of the first connecting rod is pivotally connected to the third pivot via a first rod, and the other end of the first connecting rod is pivotally connected to one end of the first long support via a second rod; one end of the second connecting rod is pivotally connected to the first base via a third rod, and the other end of the second connecting rod is pivotally connected to the other end of the first long support via a fourth rod.

[0012] In practice, the first extension and lowering assembly further includes a first steering member, one end of which is pivotally connected to one end of the second linkage via a third rod, and the other end of which is fixedly connected to the first base.

[0013] In implementation, the first extension and lowering assembly further includes a third linkage and a second steering member. One end of the third linkage is pivotally connected to the middle section of the first long support via a fifth rod, and the other end of the third linkage is pivotally connected to one end of the second steering member via a sixth rod. The other end of the second steering member is fixedly connected to the first base.

[0014] In practice, the invention further includes a first torsion member, which is connected to one end of the first long support, and the other end of the first linkage rod is connected to the second rod in a co-moving manner. One end of the second rod is connected to the first torsion member for relative rotation to generate frictional torque.

[0015] In implementation, one end of the first long support has at least one first protrusion, the surface of the at least one first protrusion has a first hole, the other end of the first linkage rod has a second hole, one end of the first torque member has a first torque part; the second rod coaxially passes through the first hole and the second hole, and one end of the second rod passes through the first torque part for relative rotation to generate frictional torque.

[0016] In practice, this invention further includes a second torsion member, which is connected to the other end of the first long bracket. The other end of the second linkage rod is connected to the fourth rod in a co-moving manner. One end of the fourth rod is connected to the second torsion member for relative rotation to generate frictional torque.

[0017] In implementation, the other end of the first long bracket has at least one second protruding plate, the surface of the at least one second protruding plate has a first through hole, the other end of the second linkage rod has a second through hole, one end of the second torque member has a second torque part; the fourth rod coaxially passes through the first through hole and the second through hole, and one end of the fourth rod passes through the second torque part for relative rotation to generate frictional torque.

[0018] In implementation, the elongated base has a second pivot and a fourth pivot on the other side in the short direction; the second extension assembly includes a first link, a second link and a second long support, and one side of the second upper cover has a second pivot, which is pivotally connected to the second pivot via at least one second pivot; one end of the first link is pivotally connected to the fourth pivot via a first straight rod, and the other end of the first link is pivotally connected to one end of the second long support via a second straight rod; one end of the second link is pivotally connected to the second base via a third straight rod, and the other end of the second link is pivotally connected to the other end of the second long support via a fourth straight rod.

[0019] In practice, the second extension assembly further includes a third steering member, one end of which is pivotally connected to one end of the second connecting rod via a third straight rod, and the other end of which is fixedly connected to the second base.

[0020] In implementation, the second extension and lowering assembly further includes a third link and a fourth steering member. One end of the third link is pivotally connected to the middle section of the second long bracket via a fifth straight rod, and the other end of the third link is pivotally connected to one end of the fourth steering member via a sixth straight rod. The other end of the fourth steering member is fixedly connected to the second base.

[0021] In practice, this invention further includes a third torsion member, which is connected to one end of the second long bracket, and the other end of the first connecting rod is connected to the second straight rod in a co-moving manner. One end of the second straight rod is connected to the third torsion member, allowing relative rotation to generate frictional torque.

[0022] In practice, this invention further includes a fourth torsion member, which is connected to the other end of the second long bracket. The other end of the second connecting rod is connected to the fourth straight rod in a co-moving manner. One end of the fourth straight rod is connected to the fourth torsion member for relative rotation to generate frictional torque.

[0023] To further understand this invention, the following preferred embodiments are provided, along with drawings and figure numbers, to explain in detail the specific composition and effects achieved by this invention:

Implementation Method

[0024] The folding keyboard of this invention mainly includes a first keyboard and a second keyboard. The first keyboard includes a first top cover and a first base. The first top cover covers the first base, and the top surface of the first top cover has a plurality of first keys. The first base has a first side and a first rear side plate perpendicular to the first side. The first rear side plate has a first heat dissipation hole. One side of the first rear side plate has a first extension component. The upper end of the first extension component is connected to a first rear side of the first top cover, thereby driving the first rear side to move upward and expose the first heat dissipation hole. The second keyboard includes a second top cover and a second base. The second top cover covers the second base, and the top surface of the second top cover has a plurality of second keys. The second base has a second side and a second rear side plate perpendicular to the second side. The second side is connected to the first side of the first base in a relatively rotatable manner, so that the first keyboard and the second keyboard can be folded relative to each other. One side of the second rear side plate has a second extension component. The upper end of the second extension component is connected to a second rear side of the second top cover, thereby driving the second rear side to move upward.

[0025] Please refer to Figures 1 and 2. The folding keyboard 1 of this invention mainly includes a first keyboard 2, a second keyboard 3, an elongated base 4, a first extension and descent component 5, and a second extension and descent component 6, with the direction closer to the user defined as the front end and the direction farther away from the user defined as the rear end.

[0026] The first keyboard 2 and the second keyboard 3 each have a rectangular shell. The first keyboard 2 includes a first top cover 21 and a first base 22. The top surface of the first top cover 21 has a plurality of first keys 23. The rear end of the first top cover 21 has a first rear side 211, and the first rear side 211 has a first rear side plate 212. One side of the first top cover 21 has two sleeves arranged at intervals, and the two sleeves are combined into a first pivot part 213. The first base 22 has a first side 221 and a first rear side plate 222 perpendicular to the first side 221. The first rear side plate 222 is located at the rear end of the first base 22. When the first top cover 21 covers the first base 22, one side of the first top cover 21 is adjacent to the first side 221 of the first base 22, and the first rear side plate 222 overlaps with the first rear side plate 212. The first rear side panel 222 has a plurality of grille-like openings on its surface, which together form a first heat dissipation hole 223; the interior of the first base 22 has modules required by the host, such as a central processing unit (CPU) / processor, and a first fan 24, wherein the first fan 24 has a first air inlet 241 and a first air outlet 242, the first air inlet 241 is connected to the internal space of the first base 22, and the first air outlet 242 is connected to the first heat dissipation hole 223.

[0027] The second keyboard 3 includes a second upper cover 31 and a second base 32. The top surface of the second upper cover 31 has a plurality of second keys 33. The rear end of the second upper cover 31 has a second rear side 311, and the second rear side 311 has a second rear side plate 312. One side of the second upper cover 31 has two sleeves arranged in a straight line at intervals, and the two sleeves are combined to form a second pivot part 313. The second base 32 has a second side 321 and a second rear side plate 322 perpendicular to the second side 321. The second rear side plate 322 is located at the rear end of the second base 32. When the second upper cover 31 covers the second base 32, one side of the second upper cover 31 is adjacent to the second side 321 of the second base 32, and the second rear side plate 322 overlaps with the second rear side plate 312. The surface of the second rear side plate 322 has a plurality of grid-like openings, and the plurality of openings are combined to form a second heat dissipation hole 323. The interior of the second base 32 contains modules required by the host, such as a central processing unit (CPU) / processor, and a second fan 34. The second fan 34 has a second air inlet 341 and a second air outlet 342. The second air inlet 341 is connected to the interior space of the second base 32, and the second air outlet 342 is connected to the second heat dissipation hole 323.

[0028] As shown in Figures 2 and 3, the elongated base 4 is a long strip plate. On one side of the elongated base 4 in the short direction, there are two spaced-apart circular sleeves and a third pivot 42. In implementation, the two circular sleeves are combined into a first pivot 41. The first pivot 213 of the first upper cover 21 is pivotally connected to the first pivot 41 via two first pivots 43. On the other side of the elongated base 4 in the short direction, there are two spaced-apart circular sleeves and a fourth pivot 45. In implementation, the two circular sleeves are combined into a second pivot 44. The second pivot 313 of the second upper cover 31 is pivotally connected to the second pivot 44 via two second pivots 46, so that the first keyboard 2 and the second keyboard 3 can be rotated and folded or unfolded relative to each other, and when unfolded, the elongated base 4 is located between the first keyboard 2 and the second keyboard 3.

[0029] As shown in Figures 2 to 5, the first extension and lowering assembly 5 mainly includes a first long support 51, a first connecting rod 52, a second connecting rod 53 and a third connecting rod 54. The first long support 51 is a long plate. The first long support 51 is locked upward to the first upper cover 21 and is located inside the first rear side 211. One end of the first long support 51 has two downwardly bent and parallel first protrusions (511, 511'). The two first protrusions (511, 511') each have a first hole 5111 on their surfaces. A long plate is fixedly connected to one side of the first protrusion 511. One end of the long plate has a C-shaped buckle. In implementation, the long plate serves as the first torque member 512 and the C-shaped buckle serves as the first torque part 5121.

[0030] The other end of the first long support 51 has two downwardly bent and parallel second convex plates (513, 513'); each of the two second convex plates (513, 513') has a first through hole 5131 on its surface. A long plate is fixedly connected to one side of the second convex plate 513. One end of the long plate has a C-shaped buckle. In practice, the long plate serves as a second torque member 514, and the C-shaped buckle serves as a second torque part 5141. The middle section of the first long support 51 has two downwardly bent and parallel third convex plates (515, 515'); each of the two third convex plates (515, 515') has a third through hole 5151 on its surface. A torque block 516 is fixedly connected to one side of one of the third convex plates 515. One end of the torque block 516 has a C-shaped ring 5161.

[0031] The first linkage 52 is a bent rod. One end of the first linkage 52 is pivotally connected to the third pivot 42 on the elongated base 4 via a first rod 521. The other end of the first linkage 52 has a second hole 522. A second rod 523 coaxially passes through the first hole 5111 and the second hole 522 to connect the other end of the first linkage 52 to the two first protrusions (511, 511') and allow the other end of the first linkage 52 to rotate synchronously with the second rod 523. One end of the second rod 523 passes through the first torque part 5121 to connect to the first torque member 512, so that the other end of the first linkage 52 can rotate relative to the first long bracket 51 to generate frictional torque. This allows the folded first keyboard 2 and second keyboard 3 to rotate stably and be positioned at a preset angle during the relative flipping to close or fully unfolding process, and to freely stop at a certain angle during rotation.

[0032] The second linkage 53 is a U-shaped linkage. One end of the second linkage 53 is pivotally connected to one end of the first steering member 532 via a third rod 531. The other end of the first steering member 532 is fixedly connected to the first base 22. The other end of the second linkage 53 has a second through hole 533. A fourth rod 534 coaxially passes through the first through hole 5131 and the second through hole 533 to connect the other end of the second linkage 53 with the two second protrusions (513, 513') and allow the other end of the second linkage 53 to rotate synchronously with the fourth rod 534. One end of the fourth rod 534 passes through the second torque part 5141 to connect the second torque member 514. Then the other end of the second linkage 53 rotates relative to the first long support 51 to generate frictional torque, and at the same time forms a four-bar linkage structure to raise and lower the first long support 51.

[0033] The third linkage 54 and the second linkage 53 have the same structure. A fifth rod 541 coaxially passes through one end of the third linkage 54 and the third through hole 5151 to connect one end of the third linkage 54 with the two third protrusions (515, 515') at the middle section of the first long bracket 51, and allows one end of the third linkage 54 to rotate synchronously with the fifth rod 541. One end of the fifth rod 541 passes through the torsion block 516 to connect to the C-shaped ring 5161, which also allows one end of the third linkage 54 to rotate relative to the first long bracket 51 to generate frictional torque. The other end of the third linkage 54 is pivotally connected to one end of the second steering member 543 via a sixth rod 542, and the other end of the second steering member 543 is fixedly connected to the first base 22, so that the third linkage 54 can provide upward support to the middle section of the first long bracket 51.

[0034] The second extension and lowering assembly 6 has a corresponding structure to the first extension and lowering assembly 5, and the second extension and lowering assembly 6 mainly includes a second long bracket 61, a first connecting rod 62, a second connecting rod 63, a third connecting rod 64, a third torsion member 65 and a fourth torsion member 66. The second long bracket 61 is an elongated plate. The second long bracket 61 is locked upward to the second upper cover 31 and is located inside the second rear side 311. One end of the first connecting rod 62 is pivotally connected to the fourth pivot 45 via a first straight rod 621, and the other end of the first connecting rod 62 is pivotally connected to one end of the second long bracket 61 via a second straight rod 622. One end of the second connecting rod 63 is pivotally connected to one end of a third steering member 632 via a third straight rod 631, and the other end of the third steering member 632 is fixedly connected to the second base 32. The other end of the second connecting rod 63 is pivotally connected to the other end of the second long bracket 61 via a fourth straight rod 633. One end of the third link 64 is pivotally connected to the middle section of the second long bracket 61 via a fifth straight rod 641, and the other end of the third link 64 is pivotally connected to one end of a fourth steering member 643 via a sixth straight rod 642. The other end of the fourth steering member 643 is fixedly connected to the second base 32.

[0035] Additionally, the third torque member 65 is connected to one end of the second long bracket 61, and the other end of the first connecting rod 62 is connected to the second straight rod 622 in a co-moving manner. One end of the second straight rod 622 is connected to the third torque member 65, allowing relative rotation to generate frictional torque. The fourth torque member 66 is connected to the other end of the second long bracket 61, and the other end of the second connecting rod 63 is connected to the fourth straight rod 633 in a co-moving manner. One end of the fourth straight rod 633 is connected to the fourth torque member 66, thereby allowing the other end of the second connecting rod 63 to rotate relative to the second long bracket 61 to generate frictional torque. Similarly, during the relative folding of the first keyboard 2 and the second keyboard 3, it can be stably rotated and positioned at a preset angle.

[0036] Thus, when the first keyboard 2 and the second keyboard 3 are in a flattened state, the first extension and lowering component 5 drives the first rear side 211 of the first top cover 21 to move upward, and at the same time, the second extension and lowering component 6 drives the second rear side 311 of the second top cover 31 to move upward, so that the first top cover 21 and the second top cover 31 can be tilted and located on the same plane, so as to facilitate user operation; when the first rear side plate 212 and the second rear side plate 312 rise to expose the first heat dissipation hole 223 and the second heat dissipation hole 323 respectively, the first fan 24 can exhaust the heat inside the first keyboard 2, and the second fan 34 can exhaust the heat inside the second keyboard 3, so as to ensure the performance of the host module such as the central processing unit / processor.

[0037] As shown in Figures 3 and 6-11, when the first keyboard 2 and the second keyboard 3 are flipped relative to each other, a four-bar linkage structure consisting of a long base 4, a first linkage 52 and a second linkage 53, and another four-bar linkage structure consisting of a long base 4, a first linkage 62 and a second linkage 63 can be used to move the first top cover 21 and the first base 22 relative to each other, and at the same time move the second top cover 31 and the second base 32 relative to each other, so that the first top cover 21 completely covers the first base 22 and the second top cover 31 completely covers the second base 32, thereby enabling the first keyboard 2 and the second keyboard 3 to rotate and fold relative to each other.

[0038] In summary, based on the above-disclosed content, this invention provides a first extension and a second extension and lowering assembly on the rear sides of the first and second keyboards, respectively. A first heat dissipation hole is provided on the first rear side plate of the first base, and a second heat dissipation hole is provided on the second rear side plate of the second base. This allows the rear side of the first top cover to rise upwards to expose the first heat dissipation hole after the first and second keyboards are relatively flattened, while simultaneously raising the rear side of the second top cover to expose the second heat dissipation hole. This not only allows the first and second top covers to be aligned side-by-side on the same inclined plane, conforming to ergonomics for user convenience, but also allows heat to dissipate from the first and second keyboards respectively, ensuring effective heat dissipation. Furthermore, by using a four-bar linkage structure, the first and second extension and lowering assemblies gradually retract the raised rear sides of the first and second keyboards, allowing them to fold and retract, reducing their size for easy portability. Therefore, this invention has significant industrial applicability, and an invention patent application is hereby filed in accordance with the law.

[0039] Although the present invention discloses preferred embodiments to achieve the above objectives, it is not intended to limit the structural features of the present invention. Anyone skilled in the art should know that any easily conceivable variations or modifications are possible under the technical spirit of the present invention and are covered by the patent application scope of the present invention. [Simplified Explanation of the Diagram]

[0040] [Figure 1] is a perspective view of the first and second keyboards of the preferred embodiment of the present invention when unfolded. [Figure 2] is an exploded view of the components of the preferred embodiment of the present invention. [Figure 3] is a perspective view of the first and second extension components of the preferred embodiment of the present invention. [Figure 4] is an exploded view of the first extension component of the preferred embodiment of the present invention. [Figure 5] is a schematic diagram of the first and second keyboards of the preferred embodiment of the present invention in their usage state when unfolded. [Figure 6] is a schematic diagram of the first and second keyboards of the preferred embodiment of the present invention in their usage state when unfolded to 135 degrees. [Figure 7] is a perspective view of the first and second keyboards of the preferred embodiment of the present invention when unfolded to 135 degrees. [Figure 8] is a schematic diagram of the first and second keyboards of the preferred embodiment of the present invention in their usage state when unfolded to 90 degrees. [Figure 9] is a three-dimensional view of the first and second keyboards of the preferred embodiment of this invention when unfolded to 90 degrees. [Figure 10] is a view of the first and second keyboards of the preferred embodiment of this invention in their folded state. [Figure 11] is a three-dimensional view of the first and second keyboards of the preferred embodiment of this invention when folded.

Claims

1. A folding keyboard, comprising: A first keyboard includes a first top cover and a first base, the first top cover covering the first base, the top surface of the first top cover having a plurality of first keys; the first base has a first side and a first rear side plate perpendicular to the first side, the first rear side plate having a first heat dissipation hole; a first extension assembly is provided on one side of the first rear side plate, the upper end of the first extension assembly being connected to a first rear side edge of the first top cover, for driving the first rear side edge to move upward and expose the first heat dissipation hole; and a second keyboard includes a second top cover and a second base, the second top cover covering the second base, the top surface of the second top cover having a plurality of second keys; the second base has a second side and a second rear side plate perpendicular to the second side, the second side being connected to the first side of the first base in a relatively rotatable manner, for the first keyboard and the second keyboard to fold relative to each other; a second extension assembly is provided on one side of the second rear side plate, the upper end of the second extension assembly being connected to a second rear side edge of the second top cover, for driving the second rear side edge to move upward.

2. The folding keyboard as claimed in claim 1, wherein the first rear side of the first top cover has a first rear side plate, the first rear side plate overlapping the first rear side plate; the second rear side of the second top cover has a second rear side plate, the second rear side plate overlapping the second rear side plate, and the second rear side plate has a second heat dissipation hole.

3. The folding keyboard as claimed in claim 2, wherein the first base has a first fan inside, the first fan having a first air inlet and a first air outlet, the first air outlet being connected to the first heat dissipation hole for discharging hot air from inside the first keyboard; and the second base has a second fan inside, the second fan having a second air inlet and a second air outlet, the second air outlet being connected to the second heat dissipation hole for discharging hot air from inside the second keyboard.

4. The folding keyboard of claim 1 further includes an elongated base, the elongated base having a first pivot and a second pivot on its short sides, the first base having a first pivot on its first side, the first pivot being pivotally connected to the first pivot via at least one first pivot, the second base having a second pivot on its second side, the second pivot being pivotally connected to the second pivot via at least one second pivot, for the first keyboard and the second keyboard to rotate and fold relative to each other.

5. The folding keyboard of claim 1 further includes an elongated base having a first pivot and a third pivot on one short side; the first extension assembly includes a first linkage, a second linkage, and a first long support; one side of the first top cover has a first pivot portion, the first pivot portion being pivotally connected to the first pivot portion via at least one first pivot; one end of the first linkage is pivotally connected to the third pivot portion via a first rod, and the other end of the first linkage is pivotally connected to one end of the first long support via a second rod; one end of the second linkage is pivotally connected to the first base via a third rod, and the other end of the second linkage is pivotally connected to the other end of the first long support via a fourth rod.

6. The folding keyboard as claimed in claim 5, wherein the first extension assembly further includes a first steering member, one end of the first steering member being pivotally connected to the end of the second linkage via the third rod, and the other end of the first steering member being fixedly connected to the first base.

7. The folding keyboard as claimed in claim 5 or 6, wherein the first extension assembly further includes a third linkage and a second steering member, one end of the third linkage being pivotally connected to the middle section of the first long bracket via a fifth rod, the other end of the third linkage being pivotally connected to one end of the second steering member via a sixth rod, and the other end of the second steering member being fixedly connected to the first base.

8. The folding keyboard as claimed in item 5 or 6 further includes a first torque member connected to one end of the first long bracket, the other end of the first linkage being connected to the second rod in a co-moving manner, one end of the second rod being connected to the first torque member for relative rotation to generate frictional torque.

9. The folding keyboard of claim 8, wherein the first long support has at least one first protrusion at one end, the surface of the at least one first protrusion has a first hole, the other end of the first linkage has a second hole, one end of the first torque member has a first torque portion; the second rod coaxially passes through the first hole and the second hole, and the end of the second rod passes through the first torque portion, allowing relative rotation to generate frictional torque.

10. The folding keyboard as claimed in claim 5 or 6 further includes a second torque member connected to the other end of the first long bracket, the other end of the second linkage being connected to the fourth rod in a co-moving manner, and one end of the fourth rod being connected to the second torque member for relative rotation to generate frictional torque.

11. The folding keyboard of claim 10, wherein the other end of the first long support has at least one second protrusion, the surface of the at least one second protrusion has a first through hole, the other end of the second linkage has a second through hole, one end of the second torque member has a second torque portion; the fourth rod coaxially passes through the first through hole and the second through hole, and the end of the fourth rod passes through the second torque portion, allowing relative rotation to generate frictional torque.

12. The folding keyboard as claimed in claim 5 or 6, wherein the elongated base has a second pivot and a fourth pivot on the other side in the short direction; the second extension assembly includes a first link, a second link, and a second long support; one side of the second top cover has a second pivot, the second pivot being pivotally connected to the second pivot via at least one second pivot; one end of the first link is pivotally connected to the fourth pivot via a first straight rod, and the other end of the first link is pivotally connected to one end of the second long support via a second straight rod; one end of the second link is pivotally connected to the second base via a third straight rod, and the other end of the second link is pivotally connected to the other end of the second long support via a fourth straight rod.

13. The folding keyboard of claim 12, wherein the second extension assembly further includes a third steering member, one end of which is pivotally connected to the end of the second link via the third straight rod, and the other end of which is fixedly connected to the second base.

14. The folding keyboard of claim 13, wherein the second extension assembly further includes a third link and a fourth steering member, one end of the third link being pivotally connected to the middle section of the second long bracket via a fifth straight rod, the other end of the third link being pivotally connected to one end of the fourth steering member via a sixth straight rod, and the other end of the fourth steering member being fixedly connected to the second base.

15. The folding keyboard of claim 12 further includes a third torque member connected to one end of the second long bracket, the other end of the first link being connected to the second straight rod in a co-moving manner, and one end of the second straight rod being connected to the third torque member for relative rotation to generate frictional torque.

16. The folding keyboard of claim 12 further includes a fourth torque member connected to the other end of the second long bracket, the other end of the second link being connected to the fourth straight rod in a co-moving manner, and one end of the fourth straight rod being connected to the fourth torque member for relative rotation to generate frictional torque.

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