Light guide structure of keyboard

Abstract

The utility model discloses a light guide structure of a keyboard, which comprises a key keyboard and a light guide plate arranged corresponding to the key keyboard, the light guide plate comprises a plate-shaped main body part and a lead-in part arranged on one side of the plate-shaped main body part, and the plate-shaped main body part is positioned right below the key keyboard and is horizontally arranged; the plate-shaped main body part comprises a first end and a second end opposite to the first end, the leading-in part comprises a bending part extending downwards from the first end of the plate-shaped main body part, and the bending part comprises a vertical bending part and a transition bending part connected with the vertical bending part and the plate-shaped main body part; the plate-shaped main body part is a variable-thickness plate of which the thickness is gradually reduced from the first end to the second end, and a lamp bead is arranged below the vertical bending part. According to the utility model, the light guide plate is arranged below the key keyboard, so that a light equalizing film and a reflecting film are not needed, the installation is simpler, and the cost is lower; in addition, the plate-shaped main body part is designed to be a variable-thickness plate, so that the uniformity of the brightness of the whole panel of the light guide plate is effectively ensured.

Description

Technical Field

[0001] The utility model relates to the field of electronic products, in particular to a light guide structure of a keyboard. Background Art

[0002] Currently, most communication terminals such as mobile phones and POS machines are equipped with keyboards. The interior of the keyboards has a light-emitting structure to illuminate the keys of the keyboard. The existing method of ensuring the uniformity of the keyboard light is generally achieved by using a laminated light-distributing film and a light-shielding film. The installation is complicated, the cost is high and it takes up a lot of space. In addition, the lamp beads of the existing keyboard need to be arranged below the keyboard keys. In order to avoid interference with the keys, it is necessary to pay attention to the mutual avoidance design during the design, which increases the complexity of design and installation. Summary of the Invention

[0003] The purpose of the utility model is to provide a light guide structure for a keyboard to solve the problems in the prior art of key keyboards that the use of laminated light-distributing films and light-shielding films results in complex installation, high cost and large space occupation.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a light-guiding structure of a keyboard, including a key keyboard and a light guide plate arranged corresponding to the key keyboard, the light guide plate including a plate-shaped main body and an inlet portion arranged on one side of the plate-shaped main body, the plate-shaped main body is located directly below the key keyboard and the plate-shaped main body is arranged horizontally; the plate-shaped main body includes a first end and a second end opposite to the first end, the inlet portion includes a bending portion extending downward from the first end of the plate-shaped main body, the bending portion includes a vertical bending portion and a transition bending portion connecting the vertical bending portion and the plate-shaped main body; the plate-shaped main body is a variable thickness plate whose thickness gradually decreases from the first end to the second end, and a lamp bead is provided below the vertical bending portion.

[0005] Preferably, the thickness of the transition bend portion and the vertical bend portion are the same, and the thickness of the transition bend portion and the thickness of the vertical bend portion are both greater than or equal to the thickness of the first end of the plate-shaped main body portion.

[0006] Preferably, the thickness of the transition bend portion and the vertical bend portion are both greater than or equal to 2.5 mm and less than or equal to 4.5 mm, and the thickness of the second end of the plate-like main body portion is greater than or equal to 1 mm and less than or equal to 3 mm.

[0007] Preferably, the first angle between the transition bend portion and the plate-like main body portion is greater than the second angle between the vertical bend portion and the plate-like main body portion, and the second angle is greater than 90 degrees and less than or equal to 92 degrees.

[0008] Preferably, the third angle between the transition bend portion and the vertical bend portion is the same as the first angle.

[0009] Preferably, the inlet portion is arranged in the length direction of the plate-like main body portion, the length of the projection of the light guide plate in the up and down directions is greater than or equal to 60 mm and less than or equal to 70 mm, and the width of the projection of the light guide plate in the up and down directions is greater than or equal to 50 mm and less than or equal to 60 mm.

[0010] Preferably, the lamp beads are LED lamp beads and there are multiple lamp beads, and the multiple lamp beads are evenly arranged along the length direction of the vertical bending portion.

[0011] Preferably, the key keyboard includes a keyboard frame and keys arranged on the keyboard frame, a plurality of mounting posts are provided under the keyboard frame, mounting holes are provided on the light guide plate corresponding to the mounting posts, and the mounting posts are passed through the mounting holes to install the light guide plate on the keyboard frame.

[0012] Preferably, a key plate is provided below the light guide plate, and a key column extending downward is provided on the key. A via hole is provided on the light guide plate corresponding to the key column, and the key column passes through the via hole and is electrically connected to the key plate.

[0013] Preferably, a circuit board is further provided below the keypad, and the lamp beads are provided on the circuit board.

[0014] Compared with the existing technology, the present invention sets a light guide plate under the keypad, eliminating the need for a light-uniform film and a reflective film, making installation simpler and cost-effective. In addition, the plate-shaped main body is designed as a variable thickness plate, which effectively ensures the uniformity of brightness of the entire panel of the light guide plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of an electronic product with a light-guiding structure of a keyboard in an embodiment of the present utility model.

[0016] Figure 2 for Figure 1 Schematic diagram of the decomposed structure.

[0017] Figure 3 This is a structural diagram of the light guide plate at one angle in an embodiment of the present utility model.

[0018] Figure 4 for Figure 3 Enlarged view of point A in the middle

[0019] Figure 5 This is a structural diagram of the light guide plate in an embodiment of the present invention from another angle. DETAILED DESCRIPTION

[0020] In order to explain the technical content, structural features and achieved effects of the present invention in detail, the following is a detailed description in conjunction with the embodiments and the accompanying drawings.

[0021] like Figures 1 to 5 As shown, an embodiment of the present invention provides a light-guiding structure of a keyboard, including a key keyboard 2 and a light guide plate 3 arranged corresponding to the key keyboard 2, the light guide plate 3 including a plate-shaped main body portion 31 and an introduction portion arranged on one side of the plate-shaped main body portion 31, the plate-shaped main body portion 31 is located directly below the key keyboard 2 and the plate-shaped main body portion 31 is arranged horizontally; the plate-shaped main body portion 31 includes a first end and a second end opposite to the first end, the introduction portion includes a bending portion extending downward from the first end of the plate-shaped main body portion 31, the bending portion includes a vertical bending portion 33 and a transition bending portion 32 connecting the vertical bending portion 33 and the plate-shaped main body portion 31, the plate-shaped main body portion 31 is a variable thickness plate whose thickness gradually decreases from the first end to the second end, and a lamp bead 6 is provided below the vertical bending portion 33. Specifically, the material of the light guide plate 3 can be PC material, and the plate-shaped main body 31 and the introduction part are integrally formed. The size of the plate-shaped main body 31 can be the same as the size of the keypad 2. The introduction part is arranged at the first end of the length direction of the plate-shaped main body 31. By setting the plate-shaped main body 31 as a variable thickness plate with a thickness gradually decreasing from the first end to the second end, the brightness of the light introduced by the vertical bending part 33 on the plate-shaped main body 31 can be more uniform.

[0022] The embodiment of the utility model sets a light guide plate 3 under the keypad 2, eliminating the need for a light-homogenizing film and a reflective film, making installation simpler and cost-effective. In addition, the plate-shaped main body is designed as a variable thickness plate, which effectively ensures the uniformity of brightness of the entire panel of the light guide plate.

[0023] In the embodiment of the present invention, the thickness of the transition bend portion 32 and the vertical bend portion 33 are the same and the thickness of the transition bend portion 32 and the vertical bend portion 33 are both greater than or equal to the thickness of the first end of the plate-shaped main body portion 31. Specifically, Figure 3 As shown, the thickness T2 of the transition bend portion 32 and the vertical bend portion 33 is greater than or equal to 2.5 mm and less than or equal to 4.5 mm, and the thickness T1 of the second end of the plate-shaped main body portion 31 is greater than or equal to 1 mm and less than or equal to 3 mm. Designing the transition bend portion 32 and the vertical bend portion 33 to be thicker can improve the light utilization efficiency of the lamp bead 6.

[0024] In the embodiment of the present invention, the first angle a1 between the transition bend portion 32 and the plate-shaped main body portion 31 is greater than the second angle a2 between the vertical bend portion 33 and the plate-shaped main body portion 31 , and the second angle a2 is greater than 90 degrees and less than or equal to 92 degrees.

[0025] In the embodiment of the present invention, the third angle a3 between the transition bend portion 32 and the vertical bend portion 33 is the same as the first angle a1. Figure 4 As shown, the angle of the second angle a2 is preferably 90.5 degrees, and the angles of the first angle a1 and the third angle a3 are preferably 135.25 degrees. Setting the angles of the first angle a1 and the third angle a3 to be the same can improve the uniformity of the brightness of the light emitted by the lamp bead 6 on the plate-shaped main body 31.

[0026] In the embodiment of the present utility model, Figure 5 As shown, the inlet portion is arranged in the length direction of the plate-shaped main body portion 31, the length L1 of the projection of the light guide plate 3 in the up and down directions is greater than or equal to 60 mm and less than or equal to 70 mm, and the width L2 of the projection of the light guide plate 3 in the up and down directions is greater than or equal to 50 mm and less than or equal to 60 mm.

[0027] In the embodiment of the present invention, the lamp beads 6 are LED lamp beads and there are multiple lamp beads 6, and the multiple lamp beads 6 are evenly arranged along the length direction of the vertical bending portion 33. Specifically, Figure 2 As shown, there can be four lamp beads 6, and the four lamp beads 6 are arranged in sequence along the length direction of the vertical bending portion 33. The lamp beads 6 are arranged below the vertical bending portion 33. The lamp beads 6 will not interfere with the keys 22, effectively reducing the design complexity of the key keyboard 2 and the complexity of the installation of the lamp beads 6, and the design is clever.

[0028] In the embodiment of the present invention, the keypad 2 includes a keyboard frame 21 and keys 22 arranged on the keyboard frame 21. A plurality of mounting posts 23 are provided below the keyboard frame 21. Mounting holes 34 are provided on the light guide plate 3 corresponding to the mounting posts 23. The mounting posts 23 are passed through the mounting holes 34 to mount the light guide plate 3 on the keyboard frame 21. Specifically, Figure 2 As shown, the key keyboard 2 can be installed on the panel 1 of the electronic product. The panel 1 is provided with a key hole 11. The key 22 is inserted into the key hole 11 and protrudes from the panel 1 for the convenience of the user. The mounting columns 23 are distributed on the edge and middle of the keyboard frame 21. The light guide plate 3 and the key keyboard 2 can be installed through the setting of the mounting columns 23 and the mounting holes 34.

[0029] In this embodiment of the present invention, a keypad 4 is provided below the light guide plate 3. A downwardly extending key post is provided on the key 22. A via hole 35 is provided on the light guide plate 3 corresponding to the key post. The key post passes through the via hole 35 and is electrically connected to the keypad 4. Specifically, the via hole 35 is provided on the light guide plate 3 to avoid the key post. The keypad 4 is provided with a contact electrically connected to the key post to identify the pressed key 22.

[0030] Furthermore, a circuit board 5 is provided below the keypad 4 , and a lamp bead 6 is provided on the circuit board 5 . When the lamp bead 6 is lit, the light emitted by the lamp bead 6 is introduced into the light guide plate 3 through the vertical bending portion 33 .

[0031] The embodiment of the present invention solves the problem of tablets, POS machines, and other devices being unable to achieve a uniform layout of the lamp beads 6 of the keypad 2 due to space limitations. The embodiment of the present invention perfectly achieves the effect of uniform brightness of the keys 22. The embodiment of the present invention has a simple structure, saves the material cost of the light-distributing film and the reflective film, as well as the assembly cost, does not require additional auxiliary materials, and is easy to form. In addition, the lamp beads 6 are arranged below the vertical bend 33, and the lamp beads 6 will not interfere with the keys 22, effectively reducing the complexity of the keypad 2 design and the complexity of the lamp beads 6 installation. At the same time, the layout of the lamp beads 6 is changed from the surface layout in the prior art to the inline layout in the embodiment of the present invention, which greatly saves the wiring space of the circuit board 5, and the design is very clever.

[0032] The above disclosure is only a preferred embodiment of the present invention and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A light guide structure for a keyboard, characterized in that: A keyboard comprises a keypad and a light guide plate arranged corresponding to the keypad, the light guide plate comprising a plate-shaped main body and an introduction portion arranged on one side of the plate-shaped main body, the plate-shaped main body being located directly below the keypad and arranged horizontally; the plate-shaped main body comprising a first end and a second end opposite to the first end; the introduction portion comprising a bent portion extending downward from the first end of the plate-shaped main body, the bent portion comprising a vertical bent portion and a transition bent portion connecting the vertical bent portion and the plate-shaped main body; The plate-shaped main body is a variable thickness plate whose thickness gradually decreases from the first end to the second end, and a lamp bead is provided below the vertical bending portion.

2. The light guide structure of the keyboard according to claim 1, wherein: The thickness of the transition bending portion and the vertical bending portion are the same, and the thickness of the transition bending portion and the vertical bending portion are both greater than or equal to the thickness of the first end of the plate-shaped main body portion.

3. The light guide structure of the keyboard according to claim 2, wherein: The thickness of the transition bending portion and the vertical bending portion are both greater than or equal to 2.5 mm and less than or equal to 4.5 mm, and the thickness of the second end of the plate-shaped main body is greater than or equal to 1 mm and less than or equal to 3 mm.

4. The light guide structure of the keyboard according to claim 3, wherein: The first angle between the transition bend portion and the plate-shaped main body portion is greater than the second angle between the vertical bend portion and the plate-shaped main body portion, and the second angle is greater than 90 degrees and less than or equal to 92 degrees.

5. The light guide structure of the keyboard according to claim 4, wherein: The angle of the third angle between the transition bending portion and the vertical bending portion is the same as the angle of the first angle.

6. The light guide structure of a keyboard according to claim 2, wherein: The inlet portion is arranged in the length direction of the plate-shaped main body portion, the length of the projection of the light guide plate in the up and down directions is greater than or equal to 60 mm and less than or equal to 70 mm, and the width of the projection of the light guide plate in the up and down directions is greater than or equal to 50 mm and less than or equal to 60 mm.

7. The light guide structure of a keyboard according to claim 1, wherein: The lamp beads are LED lamp beads and there are multiple lamp beads, and the multiple lamp beads are evenly arranged along the length direction of the vertical bending portion.

8. The light guide structure of a keyboard according to claim 1, wherein: The key keyboard includes a keyboard frame and keys arranged on the keyboard frame. A plurality of mounting posts are provided below the keyboard frame. Mounting holes are provided on the light guide plate corresponding to the mounting posts. The mounting posts are passed through the mounting holes to mount the light guide plate on the keyboard frame.

9. The light guide structure of a keyboard according to claim 8, wherein: A key plate is provided below the light guide plate, and a key column extending downward is provided on the key. A via hole is provided on the light guide plate corresponding to the key column, and the key column passes through the via hole and is electrically connected to the key plate.

10. The light guide structure of a keyboard according to claim 9, wherein: A circuit board is further provided below the keypad, and the lamp beads are provided on the circuit board.

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