TW201705177A - Illuminant keyboard - Google Patents

Abstract

An illuminant keyboard includes a keycap, a circuit board, a baseplate, and a backlight module. The keycap has a transparent character area with a character longitudinal axis. The circuit board has a switch and a transparent board region located below the transparent character area. The baseplate has a first hole located beneath the switch, and a line shape hole joining with the first hole. The line shape hole has a hole longitudinal axis. The backlight module has a plurality of scattering points located beneath the line shape hole, so the light extracted by the scattering points can pass through the line shape hole and the transparent board region, and then reach the bottom surface of the keycap to illuminate the transparent character area. The angle between the character longitudinal axis and the hole longitudinal axis is less than 60 degree.

Description

Illuminated keyboard

The present invention relates to an illuminated keyboard, and more particularly to an illuminated keyboard that enables uniform transmission of keycap characters.

Pressing, the current illuminated keyboard is usually provided with a bottom plate for supporting the key cap and the circuit board provided with the switch. When the switch is triggered when the key cap is lowered, the circuit board generates a corresponding trigger signal. In addition, a hole is also formed in the bottom plate for allowing the light from the backlight module located below the bottom plate to pass through, so that the characters on the key cap are illuminated, and the keyboard can be confirmed when the user operates the keyboard in a dim environment. The function of each key cap and its location.

However, the bottom plate is capable of supporting the keycap and the circuit board, and has sufficient structural strength, so that the area where the actual hole can be set is very limited, so the light of the backlight module is often blocked by the bottom plate, and cannot be smoothly passed through the air. The hole is transmitted to the key cap. In this case, if there are a plurality of characters arranged in a strip shape on the key cap, the problem of inconsistent light transmission brightness between the plurality of characters may occur, which affects the overall appearance of the illuminated keyboard.

Therefore, how to increase the area where the bottom plate can set the hole without affecting the support of the bottom plate to the key cap and the circuit board, thereby improving the uniformity of light transmission between the key cap characters, has become an urgent technical problem that the industry is now trying to solve. .

In view of the above disadvantages of the prior art, the present invention provides an illuminated keyboard comprising a keycap, a circuit board, a backplane, and a backlight module. The key cap has a light transmissive character area, and the light transmissive character area has a long axis of the character area. The circuit board has a switch and a light transmitting area, and the light transmitting area is located below the light transmitting character area. When the key cap is lowered to trigger the switch, the circuit board generates a trigger signal. The bottom plate has at least one extension portion extending to support the circuit board, forming a first hollow hole at a position below the switch, and forming at least one at a periphery of the first hollow hole and below the light transmission area a second hollow hole, the extension portion is separated from the first and second hollow holes, the center point of the first hollow hole and the second hollow hole is located in the first virtual straight line segment, and the axis of the character region long axis is projected on the bottom plate The angle of a virtual straight line segment is less than 60 degrees. The backlight module is located below the bottom plate, the backlight module has a plurality of scattering points, and the plurality of scattering points are located directly below the second hollow hole, and the plurality of scattering points emit light energy transmitted in the backlight module, and the light energy passes through the first The second aperture and the light transmissive region provide backlighting to the light transmissive character region 111.

Furthermore, the present invention also provides an illuminated keyboard system comprising a keycap, a circuit board, a bottom plate, and a backlight module. The keycap has a light transmissive character area, and the light transmissive character area has a long axis of the character area. The circuit board is disposed under the keycap, the circuit board has a switch, a first support arm and a light transmission area, the first support arm is a support switch, and the light transmission area is located below the light transmissive character area, and the switch is triggered when the key cap is lowered When the board generates a trigger signal, the first support arm has a first support arm width. The bottom plate is disposed under the circuit board, the bottom plate has a first hollow hole and a second hollow hole; the first hollow hole is located under the switch, the first hollow hole has a first hollow hole width; the second hollow hole is located below the light transmission area And substantially in the shape of a strip having a second hollow hole major axis and a second hollow hole width; the first hollow hole is in communication with the second hollow hole, and the axis of the character region long axis is projected on the bottom plate and the second hollow hole The angle of the long axis is less than 60 degrees. The backlight module is located below the bottom plate, the backlight module has a plurality of scattering points, and the plurality of scattering points are located directly below the second hollow hole, and the plurality of scattering points emit light energy transmitted in the backlight module, so that the light energy passes through the first The second hollow hole and the light transmitting area provide a backlight for the light transmissive character region; wherein the second hollow hole width is smaller than the first support arm width, so that the projection area of the first support arm on the bottom plate covers both sides of the second hollow hole a portion such that the first support arm can abut against the bottom plate and is located at two sides of the second hollow hole; wherein the first hollow hole width is greater than the second hollow hole width, and the projection area of the switch on the bottom plate is located in the first hollow In the hole, the first hollow hole is caused to discharge the foreign matter of the circuit board under the switch.

Compared with the prior art, the circuit board of the illuminated keyboard of the present invention is provided with a light transmission area in the light-transmissive character area of the keycap, and the bottom plate is formed at the position below the circuit board switch to form a first hollow hole, and the discharge circuit board is located below the switch. Foreign matter, while avoiding the switch of the circuit board being erroneously triggered, and forming a second hollow hole below the light transmission area of the circuit board, and increasing the setting area of the bottom hole of the bottom plate without affecting the support of the bottom plate to the key cap and the circuit board, In order to improve the light transmission range of the bottom plate to the light-transmissive character region, the light transmission of the key cap characters is uniform.

The other aspects of the present invention will be readily understood by those skilled in the art from this disclosure. The invention may also be embodied or applied by other different embodiments. The details of the present invention can be variously modified and changed without departing from the spirit and scope of the invention. In particular, the relative relationship and relative positions of the various elements in the drawings are for illustrative purposes only and are not representative of actual implementation of the invention.

The invention provides an illuminated keyboard, which can be provided with a hollow hole under the light-transmissive character area of the keycap, so that the bottom plate can increase the penetration of the transparent cap character area of the key cap under the condition that the key cap and the circuit board can be provided with sufficient support. The light range increases the uniformity of light transmission between the keycap characters.

For the description of the features of the illuminated keyboard of the present invention, please refer to the embodiment of FIG. 1 to FIG. 11. As shown in the respective figures, the illuminated keyboard 1 of the present invention includes a key cap 11, an elastic body 12, a circuit board 13, and a bottom plate. 14 and a backlight module 15.

The keycap 11 has a light transmissive character area 111 defined by a plurality of light transmissive characters on the keycap 11. For example, as shown in FIG. 4, the light transmissive character area 111 is composed of "Ctrl" is defined by the four light-transmissive characters. The light-transmissive character area 111 is an area (for example, a quadrilateral area) that can cover the four light-transmissive characters of "Ctrl"; that is, the light-transmitting character area 111 is up, down, and left. The three boundary systems are respectively adjacent to the upper, lower and left boundaries of the "C" light-transmissive character, and the right border of the light-transmissive character region 111 is adjacent to the right border of the "1" light-transmissive character. As shown in FIG. 4, the distance between the left and right boundaries of the light-transmitting character region 111 is larger than the distance between the upper and lower boundaries, and is a rectangular region having the long axis WD of the character region.

The circuit board 13 has a switch 131, a first support arm 132 and a second support arm 133, wherein the first support arm 132 and the second support arm 133 are used to jointly support the switch 131, and the first support arm 132 has a first support arm The width AW1, the second support arm 133 has a second support arm width AW2. When the keycap 11 is subjected to the downward pressure, the elastic body 12 can be forced to elastically deform, and the switch 131 of the circuit board 13 is triggered to cause the circuit board 13 to generate a trigger signal and be emitted outward, and then, when the depression force received by the keycap 11 is released, The elastomer 12 provides an elastic restoring force to return the keycap 11 to the initial position. The circuit board 13 is provided with a light transmitting area 134 below the light transmitting character area 111 for providing light energy of the backlight module 15 to pass through.

The bottom plate 14 is disposed under the circuit board 13, and includes an extending portion 143 provided with a supporting surface extending downward from the center of the keycap 11 for supporting the elastic body 12 and a portion of the circuit board 13 provided with the switch 131. The circuit board 13 and the elastic body 12 can withstand the downward pressure. The bottom plate 14 defines a first hollow hole 141, a second hollow hole 142 and a third hollow hole 144 at a position below the center of the keycap 11. The first hollow hole 141 is located below the switch 131 and has a first hollow hole width HW1. The second hollow hole 142 and the third hollow hole 144 are disposed below the light-transmitting character region 111 and the light-transmitting region 134, and are respectively located on opposite sides of the periphery of the first hollow hole 141 for increasing the light-transmitting area of the bottom plate 14. Thereby, the range of providing light energy to the light-transmitting character region 111 is increased.

The outer shape and the area of the light transmitting area 134 can be adjusted to match the second hollow hole 142 and the third hollow hole 144, so that the light that has passed through the bottom plate 14 can reach the light transmitting character area 111 as much as possible, so that the light transmitting character area 111 is Uniform light transmission between characters. As shown in FIG. 2, the first hollow hole 141 and the second hollow hole 142 are in communication with the third hollow hole 144, and the first hollow hole 141 is located between the second hollow hole 142 and the third hollow hole 144; The hole 142 and the third hollow hole 144 are substantially identical in shape, and substantially have an elongated shape, such that the amount of light passing through the second hollow hole 142 and the third hollow hole 144 is close to each other, thereby facilitating light transmission between the key cap characters. Increased uniformity. It should be noted that both the second hollow hole 142 and the end side of the third hollow hole 144 extend through a curved hole wall, which can contribute to the stamping formation of the second hollow hole 142 and the third hollow hole 144. Thereby, the service life of the stamping of the second hollow hole 142 and the third hollow hole 144 can be extended.

As shown in FIG. 2 , the backlight module 15 is located below the bottom plate 14 , and has a plurality of scattering points 151 directly under the second and third hollow holes 142 and 144 for emitting light energy transmitted inside the backlight module 15 . The light transmissive character regions 111 are provided with a backlight through the second and third hollow holes 142, 144 and the light transmitting region 134. The arrangement of the second and third hollow holes 142, 144 is used to increase the light transmission range of the bottom plate 14 under the light-transmitting character area 111, and to improve the light transmission intensity between the key cap characters. The light-transmissive character region 111 includes a central portion 1111, a left half portion 1112 and a right half portion 1113, wherein the first hollow hole 141 corresponds to the central portion 1111, and the second hollow hole 142 corresponds to the left half portion 1112, and the third portion The hollow hole 144 corresponds to the right half area 1113.

As shown in FIGS. 2 to 4, the second hollow hole 142 is located below the light transmitting region 134 and substantially has an elongated shape, and has a second hollow hole long axis HD2 and a second hollow hole width HW2. The second hollow hole width HW2 is smaller than the first support arm width AW1, so that the projection area of the first support arm 132 on the bottom plate 14 covers the two sides of the second hollow hole 142; that is, when the first support arm 132 abuts When resting on the bottom plate 14, the first support arm 132 extends to both sides of the second hollow hole 142 at the same time. In this way, the first support arm 132 can obtain a relatively stable support of the bottom plate 14 to avoid the first support arm 132 being unable to obtain sufficient support due to the additional second hollow hole 142, so that the switch 131 cannot be normally triggered.

Similarly, the third hollow hole 144 has a third hollow hole width HW3, wherein the third hollow hole width HW3 is smaller than the second support arm width AW2, so that the projection area of the second support arm 133 on the bottom plate 14 covers the third hollow hole The portions on both sides of the 144; that is, when the second support arm 133 can abut against the bottom plate 14, the second support arm 133 simultaneously extends to the sides of the third hollow hole 144. In this way, the second support arm 133 can obtain a relatively stable support of the bottom plate 14 to prevent the second support arm 133 from obtaining sufficient support due to the additional third hollow hole 144, so that the switch 131 cannot be normally triggered.

In addition, the first hollow hole width HW1 is greater than the second hollow hole width HW2, so that the projection area of the switch 131 on the bottom plate 14 can be located in the first hollow hole 141, so that the first hollow hole 141 can be discharged from the circuit board 13 at the switch. The foreign matter under the 131 is prevented from being erroneously triggered by the foreign matter under the circuit board 13.

As shown in the preferred embodiment of FIG. 4, the center point of the first hollow hole 141, the long axis HD2 of the second hollow hole and the long axis HD3 of the third hollow hole are located in the third virtual straight line segment VL3, and the long axis WD of the character zone is The angle between the axis projected on the bottom plate 14 and the third virtual straight line segment VL3 may be 0 degrees; in other words, the axis of the character region long axis WD projected on the bottom plate 14, the second hollow hole long axis HD2 and the third hollow hole The long-axis HD3 is parallel to each other with an angle of 0 degrees with each other.

As shown in FIG. 6, the center points of the first hollow hole 141 and the second hollow hole 142 are located in the first virtual straight line segment VL1, and the center points of the first hollow hole 141 and the third hollow hole 144 are located in the second virtual straight line segment. VL2, the first virtual straight line segment VL1 and the second virtual straight line segment VL2 meet each other. It should be noted that the axis of the character area long axis WD projected on the bottom plate 14 and the first virtual straight line segment VL1 intersect at an angle ɵ1 of less than 60 degrees, and the axis of the character area long axis WD is projected on the bottom plate 14 and the second virtual The straight line segment VL2 intersection angle ɵ2 remains less than 60 degrees; in other words, the axis of the character area long axis WD projected on the bottom plate 14 and the second hollow hole long axis HD2 are maintained at an angle ɵ1 of less than 60 degrees, and the character area long axis WD is The angle 投影 2 of the axis projected on the bottom plate 14 and the long axis HD3 of the third hollow hole is kept less than 60 degrees.

If the bottom plate of the illuminated keyboard needs to be provided with the connection mechanism of the scissors support frame, the area where the hollow hole can be set is limited. In the embodiment shown in FIG. 5, the bottom plate 14 cannot be provided with an additional hollow hole except for the second hollow hole 142. The second hollow hole 142 can be provided only on one side of the first hollow hole 141. The center point of the first hollow hole 141 and the second hollow hole 142 is located at the first virtual straight line segment VL1, and the angle between the axis of the character region long axis WD projected on the bottom plate 14 and the first virtual straight line segment VL1 is less than 60 degrees; In other words, the angle ɵ1 of the axis of the character area long axis WD projected on the bottom plate 14 and the second hollow hole long axis HD2 is less than 60 degrees.

As shown in FIG. 7 to FIG. 9 , it is an example of structural changes of the bottom plate of the present invention, and the first hollow holes 141 can be respectively provided with two additional (see FIG. 7 ), three (see FIG. 8 ) and four (please refer to FIG. 8 ) Referring to FIG. 9), the strip-shaped narrow hollow holes are communicated, so that the extending portion 143 on the bottom plate 14 retains a sufficient supporting area (material) for providing a relatively stable support for the elastic body 12 and the circuit board 13, and avoiding When the bottom plate 14 is opened with an additional hollow hole, the elastic body 12 and the circuit board 13 cannot be provided with sufficient supporting force, so that the elastic body 12 and the corresponding key cap 11 of the circuit board 13 are lowered, so that the switch 131 of the circuit board 13 cannot be normally triggered. Or affecting the elastic body 12 to provide an elastic force to the keycap 11, so that the operational touch of the keycap 11 is not as expected.

When the keycap 11 is a multiple keycap (for example, a blank key space bar, Enter key) of the light-transmitting character area 111, as shown in FIG. 10, the extending portion 143 is separated from the first and second hollow holes 141, 142, thereby retaining the support surface (material) between the first and second hollow holes 141, 142 of the bottom plate 14, and providing support for the elastic body 12 and the circuit board 13, as shown in FIG. 11, the first and second hollow holes The periphery of the 141, 142 can extend the first and second extending holes 1411, 1421, respectively, and increase the light transmission range of the bottom plate 14 under the light-transmitting character area 111, and increase the uniformity of light transmission of the light-transmitting character area. The first and second extending holes 1411 and 1421 further have at least one arcuate hole wall formed by the side wall of the extending portion 143 to facilitate the press forming of the first extending hole 1411, and thereby extend the punching first extending hole. 1411 mold life. As shown in FIG. 11, the apertures of the first and second hollow holes 141, 142 are larger than the apertures of the first and second extension holes 1411, 1421, respectively.

In summary, the present invention provides an illuminated keyboard, wherein the circuit board has a switch and a light transmitting area, and the light transmitting area is located below the light transmissive character area of the key cap. The bottom plate is formed at a position below the circuit board switch to form a first hollow hole, so that the circuit board switch can operate normally, and at least a second hollow hole is formed at a periphery of the first hollow hole and below the light transmitting area, thereby increasing the penetration of the bottom plate. The light range increases the uniformity of light transmission between the keycap characters, thereby increasing the overall aesthetics of the illuminated keyboard. The greater the light transmissive character area of the keycap, the more effective the utility of the present invention is.

The above embodiments are merely illustrative of the principles and effects of the invention and are not intended to limit the invention. Modifications and variations of the above-described embodiments can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be as defined in the scope of the invention.

1‧‧‧ illuminated keyboard
11‧‧‧Key Cap
111‧‧‧Transparent character area
1111‧‧‧Central District
1112‧‧‧left half
1113‧‧‧Right half
12‧‧‧ Elastomers
13‧‧‧Circuit board
131‧‧‧ switch
132‧‧‧First support arm
133‧‧‧second support arm
134‧‧‧Light transmission area
14‧‧‧floor
141‧‧‧ first hollow hole
1411‧‧‧First extension hole
142‧‧‧Second hollow hole
1421‧‧‧Second extension hole
143‧‧‧Extension
144‧‧‧ Third hollow hole
15‧‧‧Backlight module
151‧‧‧scatter points

1 is a perspective view of an embodiment of an illuminated keyboard of the present invention.

Figure 2 is an exploded view of the illuminated keyboard of Figure 1.

Fig. 3A is a view showing an example of a bottom plate of the illuminated keyboard shown in Fig. 1.

FIG. 3B is a schematic view showing the circuit board of the illuminated keyboard shown in FIG.

Figure 4 is a perspective view of a portion of the components of the illuminated keyboard of Figure 1.

Figure 5 is a perspective view of a portion of another embodiment of the illuminated keyboard of the present invention.

Figure 6 is a perspective view of a portion of a further embodiment of the illuminated keyboard of the present invention.

Figure 7 is a view showing an example of the first structure of the bottom plate of the illuminated keyboard of the present invention.

Figure 8 is a view showing an example of the second structure of the bottom plate of the illuminated keyboard of the present invention.

Figure 9 is a diagram showing an example of a third structure of the bottom plate of the illuminated keyboard of the present invention.

Fig. 10 is a view showing an example of a fourth structure of a bottom plate of the illuminated keyboard of the present invention.

Figure 11 is a view showing an example of a fifth structure of the bottom plate of the illuminated keyboard of the present invention.

1‧‧‧ illuminated keyboard

11‧‧‧Key Cap

111‧‧‧Transparent character area

1111‧‧‧Central District

1112‧‧‧left half

1113‧‧‧Right half

13‧‧‧Circuit board

131‧‧‧ switch

132‧‧‧First support arm

134‧‧‧Light transmission area

14‧‧‧floor

141‧‧‧ first hollow hole

142‧‧‧Second hollow hole

143‧‧‧Extension

144‧‧‧ Third hollow hole

15‧‧‧Backlight module

151‧‧‧scatter points

Claims (16)

An illuminated keyboard includes: a key cap having a light transmissive character area, the light transmissive character area having a character area long axis; a circuit board having a switch and a light transmissive area, the circuit board The light transmissive region is located below the light transmissive character region. When the key cap is lowered to trigger the switch, the circuit board generates a trigger signal; and a bottom plate having at least one extension portion extending to The circuit board provides support, a first hollow hole is formed at a position below the switch, and at least a second hollow hole is formed at a periphery of the first hollow hole and below the light transmitting area, the extending portion is separated from the first hollow hole a second hollow hole, the first hollow hole and the center point of the second hollow hole are located in a first virtual straight line segment, and the axis of the character area long axis projected on the bottom plate and the first virtual straight line segment An angle of less than 60 degrees; and a backlight module, the backlight module is located below the bottom plate, the backlight module has a plurality of scattering points, the plurality of scattering points are directly below the second hollow hole, the plurality Scattering point Within the radiosity of the backlight module, the light passes through the light transmitting hole and the second hollow region, and the backlight light-transmissive region 111 characters. The illuminating keyboard of claim 1, further comprising at least one first extending hole formed at a periphery of the first hollow hole and communicating with the first hollow hole, the first extending hole further having at least A section of arcuate aperture walls formed by the sidewalls of the extension. The illuminating keyboard of claim 2, wherein the aperture of the first hollow hole is larger than the aperture of the first extended hole; the area occupied by the transparent area is smaller than the area occupied by the transparent character area. The illuminating keyboard of claim 1, further comprising at least one second extending hole formed at a periphery of the second hollow hole and communicating with the second hollow hole, the second extending hole further having at least A section of arcuate aperture walls formed by the sidewalls of the extension. The illuminating keyboard of claim 1, wherein the bottom plate further has a third hollow hole located below the light transmitting area, and the plurality of scattering points are also disposed directly below the third hollow hole. The plurality of scattering points emit light energy transmitted in the backlight module, and the light energy also passes through the third hollow hole and the light transmissive area to provide backlight to the light transmissive character region, and the first hollow hole is located at The second hollow hole is between the third hollow hole and the third hollow hole. The illuminating keyboard of claim 5, wherein the light-transmissive character region comprises a central zone, a left half zone and a right half zone, the first hollow hole being located directly below the central zone, the first The second hollow hole is located directly below the left half, and the third hollow hole is located directly below the right half. The illuminating keyboard of claim 5, wherein the second hollow hole has substantially the same shape as the third hollow hole, such that the light energy passes through the second hollow hole and the third hollow hole is close to the light amount. . The illuminating keyboard of claim 5, wherein the first hollow hole and the center point of the third hollow hole are located in a second virtual straight line segment, and the long axis of the character area is projected on the bottom plate. The angle between the axis and the second virtual straight line segment is less than 60 degrees. An illuminated keyboard includes: a key cap having a light transmissive character area having a character area long axis; a circuit board, the circuit board being disposed under the key cap, the circuit board The utility model has a switch, a first supporting arm and a light transmitting area, wherein the first supporting arm supports the switch, and the light transmitting area is located below the light transmitting character area, when the key cap is lowered to trigger the switch The circuit board generates a trigger signal. The first support arm has a first support arm width. The bottom plate is disposed under the circuit board. The bottom plate has a first hollow hole and a second hollow hole. The first hollow hole is located under the switch, the first hollow hole has a first hollow hole width; the second hollow hole is located below the light transmitting area, and is substantially elongated and has a second hollow a long axis of the hole and a width of the second hollow hole; the first hollow hole is in communication with the second hollow hole, and an angle between an axis projected by the long axis of the character zone on the bottom plate and a long axis of the second hollow hole is less than 60 Degree; and a backlight module, The backlight module is located below the bottom plate. The backlight module has a plurality of scattering points. The plurality of scattering points are located directly below the second hollow hole, and the plurality of scattering points emit light energy transmitted in the backlight module. The light can pass through the second hollow hole and the light transmissive area to provide a backlight to the light transmissive character region; wherein the second hollow hole width is smaller than the first support arm width, so that the first support arm is in the The projection area on the bottom plate covers the two sides of the second hollow hole, so that the first support arm can abut against the bottom plate and is located at two sides of the second hollow hole; wherein the first hollow hole width is greater than The second hollow hole has a width, and a projection area of the switch on the bottom plate is located in the first hollow hole, so that the first hollow hole is to discharge the foreign matter of the circuit board under the switch. The illuminating keyboard of claim 9, wherein the bottom plate further has a third hollow hole, the third hollow hole is located below the light transmitting area, and the plurality of scattering points are also located in the third hollow Directly below the hole, the plurality of scattering points emit light energy transmitted in the backlight module, and the light can pass through the third hollow hole and the light transmissive area to provide backlight for the light transmissive character region, the first hollow The hole is in communication with the third hollow hole, wherein the first hollow hole is located between the second hollow hole and the third hollow hole. The illuminating keyboard of claim 10, wherein the light transmissive character region comprises a central zone, a left half zone and a right half zone, the first hollow hole being located directly below the central zone, the first The second hollow hole is located directly below the left half, and the third hollow hole is located directly below the right half. The illuminating keyboard of claim 10, wherein the second hollow hole has substantially the same shape as the third hollow hole, such that the light energy passes through the second hollow hole and the third hollow hole is close to the light amount. . The illuminating keyboard of claim 11, wherein the second hollow hole and the end side of the third hollow hole extend with an arc-shaped hole wall to facilitate the second hollow hole and the first Stamping and forming of three hollow holes. The illuminating keyboard of claim 10, wherein the circuit board further has a second supporting arm supporting the switch together with the first supporting arm, the second supporting arm having a second supporting arm width, The third hollow hole has a third hollow hole width, and the third hollow hole width is smaller than the second support arm width, so that a projection area of the second support arm on the bottom plate covers the two sides of the third hollow hole So that the second support arm can abut against the bottom plate at a position on both sides of the third hollow hole. The illuminating keyboard of claim 10, wherein the third hollow hole is substantially elongated and has a long axis of the third hollow hole, the axis of the long axis of the character area projected on the bottom plate and the axis The angle of the long axis of the second hollow hole is less than 60 degrees. The illuminating keyboard of claim 15, wherein the first hollow hole center point, the second hollow hole long axis and the third hollow hole long axis are located in a third virtual straight line segment.