A structure for improving keyboard backlight brightness and manufacturing method thereof

Abstract

The present invention relates to the field of keyboard design technology, specifically to a structure for improving the brightness of keyboard backlight and a manufacturing method thereof, comprising a shell, wherein the shell is composed of an upper shell and a lower shell assembled together, and the upper shell is provided with key holes, and a circuit board is provided in the lower shell, and the circuit board is provided with key contacts and mounting holes at the corresponding key holes. A structure for improving the brightness of keyboard backlight, which provides a better backlighting effect through the cooperation of a first backlight module and a light guide, can not only accurately illuminate the text and symbols on the keycaps, but also completely avoid light leakage, and can also provide a higher lighting brightness, thereby avoiding light pollution and facilitating users to quickly distinguish the functions of different key positions, solving the problem that the backlight setting in the existing backlight module is unreasonable, and it is difficult to improve the lighting brightness and distinction of text symbols and the accurate judgment of the keycap position, which can effectively reduce light pollution and improve the convenience of keyboard use.

Description

Technical Field

[0001] The invention relates to the technical field of keyboard design, and in particular to a structure for improving the brightness of a keyboard backlight and a manufacturing method thereof. Background Art

[0002] The keyboard is a device for inputting commands and data to operate computer equipment. There are generally multiple input keys on the keyboard for input. Since a keyboard generally needs to be equipped with multiple different function keys to meet different input needs, the user needs to correctly distinguish the functions and positions of different keys. In a dark environment, since the text on the keyboard and the edge positions of the keys on the keyboard are difficult to see clearly, light is needed to illuminate the keyboard. A backlight keyboard can illuminate the surface of the keyboard through its own backlight module, so that the user can distinguish the text and symbol information on different keys on the keyboard, and correctly judge the edge positions of the corresponding keys.

[0003] However, in current keyboards, the keyboard backlight is mainly illuminated by LED lamp beads, which requires the LED light to be correctly guided to the position where the keyboard needs to be illuminated. Traditionally, a large number of LED lamp beads are distributed on the circuit board to provide sufficient brightness of lighting, but this will also bring many problems. First, the lighting brightness that can be provided by LED lamp beads is generally related to its size. Large LED lamp beads need to occupy more space, and generally LED lamp beads are directly installed above the circuit board, which will cause the keyboard to be high and large in size, making it difficult to carry. Secondly, in the existing backlight structure, the backlight module illuminates the keycaps in all directions, which causes light to leak in the gap between the keycaps and the keyboard housing, thereby causing light pollution, which will cause more visual stimulation to users working in the dark and produce visual fatigue more quickly. Moreover, the brightness of the light used to illuminate the text and symbols on the keycaps is less different from the brightness of the leaked light, and there is also a lack of color distinction, so that the brightness of the effective text and symbols will not have obvious advantages and distinction relative to the leaked light, which is easy to mislead the user's judgment.

[0004] Although the patent with application publication number CN111812769A and titled "Keyboard backlight module, light guide film and processing method thereof" provides a method to prevent light leakage from the keyboard, it is difficult to increase the visual brightness of the backlight used to illuminate text and symbols on the keyboard, and therefore it is difficult to meet existing usage needs.

[0005] Therefore, we need a structure and a manufacturing method for improving the brightness of the keyboard backlight to solve the problem of unreasonable backlight settings in the existing backlight module, which makes it difficult to improve the lighting brightness and distinction of text symbols and accurately judge the position of the keycaps. This can effectively reduce light pollution and improve the convenience of keyboard use. Summary of the invention

[0006] The purpose of the present invention is to solve the problem that the backlight setting in the existing backlight module is unreasonable, it is difficult to improve the lighting brightness and distinction of text symbols and the accurate judgment of the keycap position. The present application provides a structure for improving the brightness of the keyboard backlight and its manufacturing method, which can effectively reduce light pollution and improve the convenience of using the keyboard.

[0007] To achieve the above object, the present invention provides the following technical solution: a structure for improving the brightness of keyboard backlight, comprising:

[0008] The housing is composed of an upper housing and a lower housing, and the upper housing is provided with key holes, and a circuit board is provided in the lower housing, and the circuit board is provided with key contacts and mounting holes at positions corresponding to the key holes;

[0009] A key cap, the key cap comprising a top light-transmitting plate corresponding to the position of the key position hole, and a central light-shielding guide column is fixedly installed at the bottom of the top light-transmitting plate, a connecting electrode for bonding and connecting the key position contacts is installed at the bottom of the central light-shielding guide column, and the bottom of the central light-shielding guide column is bonded and mounted on the circuit board through an elastic cap;

[0010] A first backlight module, a mounting groove is provided at the rear end of the lower shell, and a first backlight module for providing backlight to the keycap is provided in the mounting groove, the first backlight module includes a mounting base plate clamped in the mounting groove, and at least one first LED lamp bead is fixedly mounted on the mounting base plate, a reflective spherical shell for wrapping the first LED lamp bead is mounted on the mounting base plate, and a light guide is mounted on the reflective spherical shell, and the other end of the light guide passes through the mounting hole and is inserted into the central light-shielding guide column.

[0011] Preferably, a heat exchange plate is provided at the rear end of the mounting groove to facilitate heat exchange between the first LED lamp bead and the external air, and the heat exchange plate is wavy.

[0012] Preferably, the lower shell is provided with a second backlight module located above the circuit board and providing backlight for the keycaps, and the second backlight module is composed of a second adhesive layer, a black ink printing layer, a white ink printing layer, a light guide layer, a first adhesive layer and a reflective layer from top to bottom, the upper shell is provided with a side plug hole at the outer side of the corresponding key hole, and the side of the top light-transmitting plate is fixedly installed with a side light-transmitting plate slidably installed in the side plug-in hole, the circuit board is installed with a second LED lamp bead inserted into the light-guide layer, and the second backlight module is provided with a light-transmitting area exposing the light-guide layer at the bottom of the corresponding side light-transmitting plate, and the second backlight module is provided with a through hole for facilitating the connection electrode to pass through the second backlight module and contact the key contact.

[0013] Preferably, a bottom supporting plate for supporting a circuit board is provided at the bottom of the lower shell, and a wiring groove for wiring the light guide is provided at the bottom of the bottom supporting plate, and a top clamping plate for clamping the second backlight module is fixedly installed at the bottom of the upper shell.

[0014] Preferably, positioning posts for positioning the circuit board and the second backlight module are fixedly mounted on the lower housing, and positioning holes for fitting with the positioning posts are provided on the circuit board and the second backlight module.

[0015] Preferably, a second clamping groove is provided at the front end of the lower shell, and an end hook clamped with the second clamping groove is fixedly installed at the front end of the upper shell, and a limiting device for connecting the upper shell and the lower shell is rotatably installed at the rear end of the lower shell, and the limiting device includes a rotating seat, and a torsion spring is arranged between the rotating seat and the lower shell, a docking rod is fixedly installed on the rotating seat, and a plug-in limiting plate is fixedly installed on the docking rod, and a clamping plate corresponding to the plug-in limiting plate is fixedly installed on the upper shell.

[0016] Preferably, a cleaning brush for cleaning the keyboard is provided on the docking rod, and the cleaning brush includes a limit rod and an extension rod hinged to each other, the limit rod is slidably installed in the slide groove of the docking rod, and the end of the limit rod is clamped and installed with the corresponding limit card hole on the lower shell body, the rotating seat is connected with a reset plate for pushing the limit rod to slide along the docking rod through a reset spring, and a brush head is fixed to the end of the extension rod, a clamping arm is integrally formed on the extension rod, and a clamping block is fixed on the clamping arm, and the limit rod is provided with a clamping groove that cooperates with the clamping block to clamp.

[0017] Preferably, side transparent plates for light transmission are provided on the left and right sides of the lower shell, and side shading sheets for closing the side transparent plates are installed on the left and right sides of the lower shell, a storage groove for accommodating the side shading sheets is provided between the docking rod and the lower shell, and an isolation plate for assisting the docking rod to close the storage groove is fixedly installed on the limit rod, and a guide opening for guiding the movement of the isolation plate is opened on the docking rod.

[0018] Preferably, the lower shell is provided with a first clamping groove inside the corresponding receiving groove, and a first clamping block clamped with the first clamping groove is fixedly mounted on the upper shell.

[0019] A method for manufacturing a structure for improving the brightness of a keyboard backlight comprises the following steps:

[0020] Step 1: First, install the first LED lamp bead on the mounting substrate, then insert the end of the light guide into the reflective spherical shell, then use sealant to install the reflective spherical shell on the mounting substrate and use the reflective spherical shell to wrap the first LED lamp bead, then clamp the mounting substrate in the mounting groove, and then arrange the light guide in the lower shell;

[0021] Step 2: Place the circuit board in the lower housing, manually insert the light guide into the mounting hole on the circuit board, and then fix the light guide and the circuit board with sealant, then trim the light guide exposed on the top of the circuit board to expose a specified length, then fix the circuit board and the lower housing with bolts, and then bond the bottom of the elastic cap to the circuit board;

[0022] Step 3: Correctly buckle the upper shell and the lower shell, then insert the keycap into the key hole, and insert the part of the light guide exposed above the circuit board into the central light-shielding guide column, and make the bottom of the central light-shielding guide column able to fit over the top of the elastic cap.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention proposes a structure for improving the brightness of the keyboard backlight, which provides a better backlighting effect through the cooperation of a first backlight module and a light guide line. It can not only accurately illuminate the text and symbols on the keycaps, but also completely avoid light leakage. At the same time, it can also provide a higher lighting brightness, thereby avoiding light pollution and facilitating users to quickly distinguish the functions of different key positions. It solves the problem of unreasonable backlight setting in the existing backlight module, which makes it difficult to improve the lighting brightness and distinction of text symbols and accurately judge the keycap position. It can effectively reduce light pollution and improve the convenience of using the keyboard. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 It is an exploded view of the structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the upper shell of the present invention;

[0028] Figure 4 It is a side view of the upper shell of the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of the lower shell of the present invention;

[0030] Figure 6 It is a partial cross-sectional schematic diagram of the second backlight module and the circuit board of the present invention;

[0031] Figure 7 is a schematic structural diagram of a second backlight module of the present invention;

[0032] Figure 8 It is a structural schematic diagram of the circuit board of the present invention;

[0033] Fig. 9 It is a schematic diagram of the structure of the cleaning brush of the present invention;

[0034] Fig.10 It is a schematic diagram of the structure of the limiting device of the present invention;

[0035] Fig.11 is a structural cross-sectional view of the key cap of the present invention;

[0036] Fig.12 It is a schematic structural diagram of the first backlight module of the present invention.

[0037] In the figure: 1. Shell; 101. Upper shell; 102. Lower shell; 2. Cleaning brush; 201. Brush head; 202. Isolation plate; 203. Limit rod; 204. Extension rod; 205. Clamping arm; 206. Block; 207. Slot; 3. Limiting device; 301. Rotating seat; 302. Torsion spring; 303. Reset spring; 304. Reset plate; 305. Plug-in limiting piece; 306. Slide groove; 307. Docking rod; 308. Guide port; 4. Key cap; 401. Top light-transmitting plate; 402. Side light-transmitting plate; 403. Center light-shielding guide column; 404. Elastic cap; 405. Connecting electrode; 5. First backlight module; 501. Reflective ball shell; 502. First LED lamp bead; 503. Mounting substrate ; 6. Second backlight module; 601. Reflective layer; 602. First adhesive layer; 603. White ink printing layer; 604. Black ink printing layer; 605. Second adhesive layer; 606. Light guide layer; 7. End hook; 8. Side plug hole; 9. Key hole; 10. Key contact; 11. Circuit board; 12. Mounting hole; 13. Second LED lamp bead; 14. Positioning hole; 15. Through hole; 16. Light-transmitting area; 17. Side shading sheet; 18. Side transparent plate; 19. First clamping groove; 20. Heat exchange plate; 21. Mounting groove; 22. Storage groove; 23. Positioning column; 24. Bottom bearing plate; 25. Light guide line; 26. Second clamping groove; 27. First clamping block; 28. Clamping plate; 29. ​​Top clamping plate. DETAILED DESCRIPTION

[0038] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Example 1: Please refer to Figures 1 to 12The present invention provides a structure for improving the brightness of keyboard backlight, including a shell 1, a key cap 4 and a first backlight module 5. The shell 1 is assembled by an upper shell 101 and a lower shell 102, and the upper shell 101 is provided with a key hole 9, and a circuit board 11 is arranged in the lower shell 102, and the circuit board 11 is provided with a key contact 10 and a mounting hole 12 at the corresponding key hole 9, and the circuit board 11 is used to connect to an external computer or other equipment through a USB interface.

[0040] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 and Fig.11 The key cap 4 includes a top light-transmitting plate 401 corresponding to the position of the key hole 9, and a central light-shielding guide column 403 is fixedly installed at the bottom of the top light-transmitting plate 401, and a connecting electrode 405 for bonding and connecting the key contact 10 is installed at the bottom of the central light-shielding guide column 403, and the bottom of the central light-shielding guide column 403 is bonded and installed on the circuit board 11 through an elastic cap 404, and a light-shielding paint layer is arranged on the outside of the top light-transmitting plate 401, and a light-shielding paint layer flows out to form a light-transmitting position for characters and symbols, so as to display the corresponding characters and symbols Information, the light irradiated on the top light-transmitting plate 401 can only pass through the light-transmitting position. When the top light-transmitting plate 401 is squeezed downward, the elastic cap 404 will be deformed, so that the central light-shielding guide column 403 and the connecting electrode 405 can move downward, and then the connecting electrode 405 contacts the key contact 10 at the corresponding position of the circuit board 11, thereby connecting the key contact 10 at this position, so that the corresponding key signal can be sent out. The elastic cap 404 can be made of rubber or silicone, and the central light-shielding guide column 403 can be made of plastic.

[0041] See also Figure 2 , Figure 5 and Fig.12The rear end of the lower shell 102 is provided with a mounting groove 21, and a first backlight module 5 for providing backlight to the keycap 4 is provided in the mounting groove 21. The first backlight module 5 includes a mounting substrate 503 clamped and mounted in the mounting groove 21, and at least one first LED lamp bead 502 is fixedly mounted on the mounting substrate 503, a reflective spherical shell 501 for wrapping the first LED lamp bead 502 is mounted on the mounting substrate 503, and a light guide 25 is mounted on the reflective spherical shell 501, and the other end of the light guide 25 passes through the mounting hole 12 and is inserted into the central light shielding guide column 40 3, a heat exchange sheet 20 is provided at the rear end of the mounting groove 21 for facilitating heat exchange between the first LED lamp bead 502 and the external air, and the heat exchange sheet 20 is wavy, and the inner wall of the reflective spherical shell 501 is also provided with a reflective mirror surface, thereby reducing the loss of light caused by reflection inside the reflective spherical shell 501, which is conducive to the light being transmitted out through the light guide 25. The light guide 25 can be made of PC material or PMMA material, or glass fiber. At the same time, the outer side of the light guide 25 needs to be provided with white light-shielding paint or white ink to prevent light from leaking during the transmission process. The use of the first backlight module 5 and the light guide 25 to provide backlight has the following advantages. First, the space between the upper shell 101 and the lower shell 102 is limited. If the first LED lamp bead 502 is directly installed on the circuit board 11, the circuit board 11 and the key cap 4 and other components need to be installed in the corresponding internal position of the shell. This will cause the first LED lamp bead 502 to only be installed with smaller lamp beads, resulting in a smaller brightness that can be provided by a single lamp bead. If you want to increase the brightness of the backlight, you need to increase the number of these small lamp beads, which requires opening a large number of holes on the circuit board 11 and making the circuit design on the circuit board 11 more The keyboard is complex and a large number of lamp beads working on the circuit board 11 will also cause the heat to accumulate quickly on the circuit board 11, and it is difficult to add a heat dissipation structure on the circuit board 11. Therefore, the service life of the keyboard is easily reduced due to the influence of accumulated heat. After the first LED lamp beads 502 are installed in the special installation groove 21, larger LED lamp beads can be used directly, thereby effectively improving the brightness of the backlight. At the same time, the heat generated by these first LED lamp beads 502 can also be quickly dissipated through the heat exchange plate 20, thereby solving the influence of the temperature accumulation caused by the LED lamp beads on the service life of the circuit board 11.Furthermore, the use of the light guide line 25 for guiding light has the following advantages. First, the light guiding efficiency of the light guide line 25 is high, and the general light transmittance can reach 85% to 98%, resulting in less luminous flux loss. After changing the installation position of the first LED lamp bead 502, the first LED lamp bead 502 can be replaced with a higher-power LED lamp bead, thereby obtaining a backlight with higher brightness. Secondly, the light guide line 25 can rely on the end to illuminate the designated top light-transmitting plate 401 area for light transmission, so that the first LED lamp bead 502 emitting light of different colors can be connected by multiple light guide lines 25 under the same key cap 4. In this way, different light transmission areas on the same key cap 4 can be illuminated by light of different colors guided by multiple light guide lines 25, thereby achieving Differentiated color display of different text display positions facilitates user distinction. At the same time, when multiple light guide lines 25 use different colors to illuminate the same light-transmitting area, light superposition can be achieved. In this way, the color displayed on the keycap 4 can be changed through reasonable programming, thereby achieving complex and precise backlight color changes. The first LED lamp bead 502 is electrically connected to the circuit board 11 through the corresponding cable, so that the corresponding circuit on the circuit board 11 is used for power supply and color change control. The light guide line 25 will only accurately illuminate the designated position, and will not cause light leakage at the gap of the keycap 4. Therefore, light pollution is not easy to occur, which is convenient for users to use in the dark and avoids excessive visual stimulation of light.

[0042] See also Figure 4 , Figure 5 ,and Fig.10 The front end of the lower shell 102 is provided with a second clamping groove 26, and the front end of the upper shell 101 is fixedly installed with an end hook 7 clamped with the second clamping groove 26, and the rear end of the lower shell 102 is rotatably installed with a limiting device 3 for connecting the upper shell 101 and the lower shell 102, and the limiting device 3 includes a rotating seat 301, and a torsion spring 302 is arranged between the rotating seat 301 and the lower shell 102, a docking rod 307 is fixedly installed on the rotating seat 301, and a plug-in limiting piece 305 is fixedly installed on the docking rod 307, and the upper shell 101 is fixed A clamping plate 28 is installed to be clamped with the plug-in limit plate 305. When the upper shell 101 needs to be buckled with the lower shell 102, the end hook 7 is first inserted into the second clamping groove 26, and then the docking rod 307 is rotated to make the plug-in limit plate 305 and the clamping plate 28 clamped correctly, and the docking rod 307 can also be pressed by the torsion spring 302 to a state tending to clamp the plug-in limit plate 305 and the clamping plate 28, so that the upper shell 101 and the lower shell 102 can be quickly fixed.

[0043] See also Figure 5 , Fig. 9 and Fig.10A cleaning brush 2 for cleaning the keyboard is provided on the docking rod 307, and the cleaning brush 2 includes a limiting rod 203 and an extension rod 204 which are hinged to each other, the limiting rod 203 is slidably installed in the slide groove 306 of the docking rod 307, and the end of the limiting rod 203 is clamped and installed with the corresponding limiting clamping hole on the lower shell 102, and a reset plate 304 for pushing the limiting rod 203 to slide along the docking rod 307 is connected to the rotating seat 301 through a reset spring 303, and a brush head 201 is fixed to the end of the extension rod 204, a clamping arm 205 is integrally formed on the extension rod 204, and a clamping block 206 is fixed on the clamping arm 205, and a clamping groove 207 which cooperates with the clamping block 206 is opened on the limiting rod 203. When the cleaning brush 2 is to be used to clean the keyboard, it is only necessary to take the cleaning brush 2 out of the docking rod 307, and then rotate the extension rod 204 relative to the limiting rod 203 so that the block 206 is inserted into the slot 207, and then the limiting rod 203 and the extension rod 204 can be held to clean the keyboard using the brush head 201. When the cleaning brush 2 needs to be stored, the extension rod 204 is rotated in the opposite direction relative to the limiting rod 203 so that the block 206 is disengaged from the slot 207 and the extension rod 204 and the limiting rod 203 are rotated to the desired folding state, and then the limiting rod 203 is inserted into the slide groove 306 and the reset plate 304 is squeezed so that the end of the limiting rod 203 can be correctly inserted into place. The cleaning brush 2 is fixed in the corresponding limiting card hole in the lower shell 102. At this time, the cleaning brush 2 can be fixed and stored, and the limiting rod 203 of the cleaning brush 2 can also be used to fix the position of the docking rod 307, thereby avoiding the second clamping groove 26 and the clamping plate 28 from being out of the clamping state due to the rotation of the docking rod 307, thereby causing the upper shell 101 and the lower shell 102 to be unable to be fixed. When the cleaning brush 2 needs to be taken out of the docking rod 307 for use, it is only necessary to squeeze the corresponding position on the limiting rod 203 so that the reset plate 304 enters the compressed state to disengage the end of the limiting rod 203 from the corresponding limiting card hole, and then the docking rod 307 can be rotated to remove the cleaning brush 2 from the docking rod 3 07, and if the cleaning brush 2 is indeed lost, the user only needs to press the reset plate 304 into the slide groove 306 with a finger to rotate the docking rod 307 into place, thereby not delaying the normal use of the docking rod 307.

[0044] In the present embodiment, a better backlighting effect is provided by the cooperation of the first backlight module 5 and the light guide line 25, which can not only accurately illuminate the text and symbols on the keycap 4, but also completely avoid light leakage. At the same time, it can also provide a higher lighting brightness, thereby avoiding light pollution and facilitating users to quickly distinguish the functions of different key positions. It solves the problem of unreasonable backlight setting in the existing backlight module, which makes it difficult to improve the lighting brightness and distinction of text symbols and the accurate judgment of the keycap position, and can effectively reduce light pollution and improve the convenience of using the keyboard.

[0045] Example 2: Please refer to Figure 2 , Figure 6 , Figure 7 and Figure 8On the basis of the first embodiment, a second backlight module 6 is provided in the lower shell 102, which is located above the circuit board 11 and provides backlight for the key cap 4, and the second backlight module 6 is composed of a second adhesive layer 605, a black ink printing layer 604, a white ink printing layer 603, a light guide layer 606, a first adhesive layer 602 and a reflective layer 601 from top to bottom. The upper shell 101 is provided with a side plug hole 8 at the outer side of the corresponding key hole 9, and a side light-transmitting plate 402 slidably installed in the side plug hole 8 is fixedly installed on the side of the top light-transmitting plate 401. A second LED lamp bead 13 inserted into the light guide layer 606 is installed on the circuit board 11, and the reflective layer 601 and the white ink printing layer 603 are used to reflect the light emitted by the second LED lamp bead 13. The second backlight module 6 is provided with a light-transmitting area 16 exposing the light-guide layer 606 at the bottom of the corresponding side light-transmitting plate 402, and a through hole 15 is provided on the second backlight module 6 for facilitating the connection electrode 405 to pass through the second backlight module 6 and contact the key position contact 10. The second backlight module 6 is used to provide a second type of light for the keyboard. Specifically, when a user uses the keyboard, through the backlight provided by the first backlight module 5, the user can know the specific key function corresponding to the corresponding keyboard, but it is difficult to determine the edge position of the keycap 4 on the key position, so it is difficult to press accurately. When the side light-transmitting plate 402 is set on the side of the top light-transmitting plate 401, the side light-transmitting plate 402 is provided on the side of the top light-transmitting plate 401. The light plate 402 can be illuminated by the backlight provided by the second LED lamp bead 13, and the brightness on the side light-transmitting plate 402 is lower than the brightness on the top light-transmitting plate 401, and can only be used to determine the edge of the keycap 4 in a dark environment, and will not interfere with the user's misjudgment of the text and symbols displayed on the keycap, thereby misjudging the function of the corresponding key position. In addition, since the side light-transmitting plate 402 has a lower demand for brightness, the number of second LED lamp beads 13 installed can be effectively reduced. Since the second LED lamp bead 13 is mainly used for auxiliary lighting of the keycap 4, the demand for backlight brightness is small. At the same time, the change in backlight brightness provided by the second LED lamp bead 13 has little effect on the user's judgment of the position of the keycap 4 in the dark, and the side The spacing between the light-transmitting plates 402 is small, so there is no need to set an additional shading layer above the black ink printing layer 604. As long as the light can pass through the light-guiding layer 606 and shine on the side light-transmitting plate 402, the bottom of the lower shell 102 is provided with a bottom supporting plate 24 for supporting the circuit board 11, and the bottom of the bottom supporting plate 24 is provided with a wiring groove for wiring the light guide 25. The bottom of the upper shell 101 is fixedly installed with a top clamping plate 29 for clamping the second backlight module 6. The cooperation of the top clamping plate 29 and the bottom supporting plate 24 can effectively fix the upper and lower positions of the circuit board 11 and the second backlight module 6. The lower shell 102 is fixedly installed with a positioning column 23 for positioning the circuit board 11 and the second backlight module 6.The circuit board 11 and the second backlight module 6 are provided with positioning holes 14 that are sleeved with the positioning posts 23. The positioning posts 23 can effectively limit the front, back, left, and right positions of the circuit board 11 and the second backlight module 6, further solving the problem of unreasonable backlight settings in existing backlight modules, making it difficult to improve the lighting brightness and distinction of text symbols and accurately determine the position of keycaps, and can effectively reduce light pollution and improve the convenience of keyboard use.

[0046] Example 3: Please refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 On the basis of the second embodiment, the left and right sides of the lower shell 102 are both provided with side transparent plates 18 for light transmission, and the left and right sides of the lower shell 102 are both plugged with side shading sheets 17 for closing the side transparent plates 18, a storage groove 22 for storing the side shading sheets 17 is provided between the docking rod 307 and the lower shell 102, and an isolation plate 202 for assisting the docking rod 307 to close the storage groove 22 is fixedly installed on the limit rod 203, and a guide port 308 for guiding the movement of the isolation plate 202 is opened on the docking rod 307, the lower shell 102 is provided with a first clamping groove 19 inside the corresponding storage groove 22, and a first clamping block 27 clamped with the first clamping groove 19 is fixedly installed on the upper shell 101, through The left and right sides of the lower shell 102 are provided with side transparent panels 18, and the left and right sides of the keyboard can be illuminated by the light emitted by the first LED lamp bead 502 or the second LED lamp bead 13, so that the user can judge the position of the left and right edges of the keyboard in the dark, and it is convenient for the user to adjust the hand position when using it. When the user does not need to illuminate the left and right positions of the keyboard through the side transparent panel 18, the side shading sheet 17 can be taken out from the storage slot 22 and the side transparent panel 18 can be shielded, which further solves the problem of unreasonable backlight setting in the existing backlight module, and it is difficult to improve the lighting brightness and distinction of text symbols and the accurate judgment of the keycap position, which can effectively reduce light pollution and improve the convenience of using the keyboard.

[0047] Embodiment 4: Based on Embodiment 3, the present invention further provides a method for manufacturing a structure for improving the brightness of a keyboard backlight, comprising the following steps:

[0048] Step 1: First, install the first LED lamp bead 502 on the mounting substrate 503, then insert the end of the light guide 25 into the reflective spherical shell 501, then use the sealant to install the reflective spherical shell 501 on the mounting substrate 503 and use the reflective spherical shell 501 to wrap the first LED lamp bead 502, then clamp the mounting substrate 503 in the mounting groove 21, and then arrange the light guide 25 in the lower shell 102;

[0049] Step 2: Place the circuit board 11 in the lower housing 102, manually insert the light guide 25 into the mounting hole 12 on the circuit board 11, and then fix the light guide 25 and the circuit board 11 through the sealant, and then trim the light guide 25 exposed on the top of the circuit board 11 so that the light guide 25 is exposed to a specified length, and then fix the circuit board 11 and the lower housing 102 with bolts, and then bond the bottom of the elastic cap 404 to the circuit board 11;

[0050] Step three: correctly buckle the upper shell 101 and the lower shell 102 together, then insert the keycap 4 into the key hole 9, and at the same time make the part of the light guide 25 exposed above the circuit board 11 be inserted into the central light-shielding guide column 403, and make the bottom of the central light-shielding guide column 403 able to fit over the top of the elastic cap 404.

[0051] Although the above describes the illustrative specific implementation methods of the present application so that technicians in this technical field can understand the present application, the present application is not limited to the scope of the specific implementation methods. For ordinary technicians in this technical field, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations using the concept of the present application are protected.

Claims

1. A structure for improving the brightness of keyboard backlight, characterized in that: include: A housing (1), the housing (1) being assembled from an upper housing (101) and a lower housing (102), wherein the upper housing (101) is provided with a key hole (9), a circuit board (11) is provided in the lower housing (102), and the circuit board (11) is provided with key contacts (10) and mounting holes (12) at locations corresponding to the key holes (9); A key cap (4), the key cap (4) comprising a top light-transmitting plate (401) corresponding to the position of the key position hole (9), and a central light-shielding guide column (403) is fixedly mounted on the bottom of the top light-transmitting plate (401), a connecting electrode (405) for bonding and connecting the key position contact (10) is mounted on the bottom of the central light-shielding guide column (403), and the bottom of the central light-shielding guide column (403) is bonded and mounted on the circuit board (11) via an elastic cap (404); A first backlight module (5), wherein a mounting groove (21) is provided at the rear end of the lower housing (102), and a first backlight module (5) for providing backlight to the keycap (4) is provided in the mounting groove (21), the first backlight module (5) comprising a mounting substrate (503) clamped and mounted in the mounting groove (21), and at least one first LED lamp bead (502) is fixedly mounted on the mounting substrate (503), a reflective spherical shell (501) for encapsulating the first LED lamp bead (502) is mounted on the mounting substrate (503), and a light guide (25) is mounted on the reflective spherical shell (501), and the other end of the light guide (25) passes through the mounting hole (12) and is inserted into the central light shielding guide column (403); The front end of the lower shell (102) is provided with a second clamping groove (26), and the front end of the upper shell (101) is fixedly mounted with an end clamping hook (7) clamped with the second clamping groove (26); the rear end of the lower shell (102) is rotatably mounted with a limiting device (3) for connecting the upper shell (101) and the lower shell (102), and the limiting device (3) comprises a rotating seat (301), and a torsion spring (302) is arranged between the rotating seat (301) and the lower shell (102); a docking rod (307) is fixedly mounted on the rotating seat (301), and a plug-in limiting piece (305) is fixedly mounted on the docking rod (307); a clamping plate (28) corresponding to the plug-in limiting piece (305) is fixedly mounted on the upper shell (101), and a spring (306) for connecting the keyboard is arranged on the docking rod (307). A cleaning brush (2) for cleaning, wherein the cleaning brush (2) comprises a limit rod (203) and an extension rod (204) which are hinged to each other, the limit rod (203) being slidably mounted in a slide groove (306) of a docking rod (307), and the end of the limit rod (203) being clamped and mounted with a corresponding limit clamping hole on a lower shell (102), the rotating seat (301) being connected with a reset plate (304) for pushing the limit rod (203) to slide along the docking rod (307) via a reset spring (303), and a brush head (201) being fixed to the end of the extension rod (204), a clamping arm (205) being integrally formed on the extension rod (204), and a clamping block (206) being fixed on the clamping arm (205), and a clamping groove (207) for clamping with the clamping block (206) being provided on the limit rod (203).

2. The structure for improving the brightness of keyboard backlight according to claim 1, characterized in that: A heat exchange plate (20) is provided at the rear end of the installation groove (21) to facilitate heat exchange between the first LED lamp bead (502) and the external air, and the heat exchange plate (20) is wavy.

3. The structure for improving keyboard backlight brightness according to claim 1, characterized in that: The lower housing (102) is provided with a second backlight module (6) located above the circuit board (11) and providing backlight for the key cap (4), and the second backlight module (6) is composed of a second adhesive layer (605), a black ink printing layer (604), a white ink printing layer (603), a light guide layer (606), a first adhesive layer (602) and a reflective layer (601) from top to bottom. The upper housing (101) is provided with a side plug hole (8) at the outer side of the corresponding key hole (9), and the side of the top light-transmitting plate (401) is A side light-transmitting plate (402) is fixedly mounted on the side and slidably mounted in the side plug-in hole (8); a second LED lamp bead (13) inserted into the light-guiding layer (606) is mounted on the circuit board (11); and a light-transmitting area (16) for exposing the light-guiding layer (606) is provided on the second backlight module (6) at the bottom of the corresponding side light-transmitting plate (402); and a through hole (15) is provided on the second backlight module (6) for facilitating the connection electrode (405) to pass through the second backlight module (6) and contact the key contact (10).

4. The structure for improving keyboard backlight brightness according to claim 3, characterized in that: A bottom bearing plate (24) for bearing a circuit board (11) is provided at the bottom of the lower housing (102), and a wiring groove for wiring the light guide (25) is provided at the bottom of the bottom bearing plate (24), and a top pressing plate (29) for pressing the second backlight module (6) is fixedly mounted at the bottom of the upper housing (101).

5. The structure for improving keyboard backlight brightness according to claim 3, characterized in that: A positioning column (23) for positioning the circuit board (11) and the second backlight module (6) is fixedly mounted on the lower housing (102), and a positioning hole (14) for fitting and sleeved with the positioning column (23) is provided on the circuit board (11) and the second backlight module (6).

6. The structure for improving keyboard backlight brightness according to claim 1, characterized in that: The left and right sides of the lower shell (102) are both provided with side transparent plates (18) for transmitting light, and the left and right sides of the lower shell (102) are both plugged with side light shielding sheets (17) for closing the side transparent plates (18), a storage groove (22) for storing the side light shielding sheets (17) is provided between the docking rod (307) and the lower shell (102), and an isolation plate (202) for assisting the docking rod (307) in closing the storage groove (22) is fixedly installed on the limit rod (203), and a guide opening (308) for guiding the movement of the isolation plate (202) is provided on the docking rod (307).

7. The structure for improving keyboard backlight brightness according to claim 6, characterized in that: The lower shell (102) is provided with a first clamping groove (19) inside the corresponding receiving groove (22), and a first clamping block (27) clamped with the first clamping groove (19) is fixedly mounted on the upper shell (101).

8. A method for manufacturing a structure for improving keyboard backlight brightness according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: firstly, the first LED lamp bead (502) is mounted on the mounting substrate (503), and then the end of the light guide (25) is inserted into the reflective spherical shell (501), and then the reflective spherical shell (501) is mounted on the mounting substrate (503) using a sealant and the reflective spherical shell (501) is used to wrap the first LED lamp bead (502), and then the mounting substrate (503) is clamped in the mounting groove (21), and then the light guide (25) is arranged in the lower shell (102); Step 2: placing the circuit board (11) in the lower housing (102), manually inserting the light guide (25) into the mounting hole (12) on the circuit board (11), and then fixing the light guide (25) and the circuit board (11) by means of sealant, and then trimming the light guide (25) exposed from the top of the circuit board (11) so that the light guide (25) is exposed to a specified length, and then fixing the circuit board (11) and the lower housing (102) by means of bolts, and then bonding the bottom of the elastic cap (404) to the circuit board (11); Step 3: Correctly buckle the upper shell (101) and the lower shell (102), and then insert the key cap (4) into the key hole (9), and insert the portion of the light guide (25) exposed above the circuit board (11) into the central light-shielding guide column (403), and make the bottom of the central light-shielding guide column (403) fit over the top of the elastic cap (404).

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