CN1200439C - Key unit for keyboard of computer - Google Patents
Key unit for keyboard of computer Download PDFInfo
- Publication number
- CN1200439C CN1200439C CN 00117646 CN00117646A CN1200439C CN 1200439 C CN1200439 C CN 1200439C CN 00117646 CN00117646 CN 00117646 CN 00117646 A CN00117646 A CN 00117646A CN 1200439 C CN1200439 C CN 1200439C
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- circuit board
- printed circuit
- conductive junction
- pcb
- junction point
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Abstract
The present invention relates to a key unit for a keyboard of a computer, which comprises a rigid printed circuit board, a soft printed circuit board and a key mechanism, wherein the upper surface of the rigid printed circuit board is provided with two adjacent electric conduction ends which are respectively electrically connected with two conducting wires; the soft printed circuit board is fixed on the rigid printed circuit board; the bottom surface of the soft printed circuit board is provided with conducting strips and a isolating layer. The conducting strips are positioned on the two electric conduction ends of the printed circuit board. The isolation layer is arranged around the conducting strip for creating an interval between the conducting strips and the two electric conduction ends. The key mechanism is fixed on the soft printed circuit board in a up-and-down pressing method.
Description
The present invention relates to a kind of key device that is used for a computor-keyboard, particularly relate to a kind of computor-keyboard of making key circuit with rigid printed circuit board (PCB).
See also Fig. 1 and Fig. 2, Fig. 1 is the schematic diagram of existing computor-keyboard 10, and Fig. 2 is the cutaway view of computor-keyboard 10 along tangent line 2-2.Computor-keyboard 10 includes a plastic casing 12, and a plurality of key device 14 is fixed in the plastic casing 12.
See also Fig. 3, Fig. 3 is the schematic diagram of existing key device 40 part bodies of another kind of computor-keyboard 10.Key device 40 includes two soft printed circuit boards 42,44, upper and lower folded mutually in the mode of pasting, soft printed circuit board 42,44 respectively is provided with an insulating barrier 54,56, is printed on the bottom side surface 46 of soft printed circuit board 42 and around conducting strip 50 and the uper side surface 48 of soft printed circuit board 44 and around conducting strip 52 in the mode of printing.Insulating barrier 54 protrudes from the bottom side surface 46 of soft printed circuit board 42, and insulating barrier 56 protrudes from the uper side surface 48 of soft printed circuit board 44, and therefore two insulating barriers, 54,56 formed thickness make between two conducting strips 50,52 and produced a spacing.
Because the material of soft printed circuit board 16,18 and 42,44 is very soft, decoder all can't be welded in its top, therefore computor-keyboard 10 can't directly produce decoded push button signalling, it must be connected to a decoding circuit (not shown) separately by holding wire, could produce corresponding push button signalling.
In addition, supporting base plate 17 only is bracing force required when being used to provide pressing keys device 14, not other purposes.
The object of the present invention is to provide a kind of key device, it includes rigid printed circuit board (PCB), to address the above problem.
The object of the present invention is achieved like this, and a kind of key device that is used for a computor-keyboard promptly is provided, and it includes: a rigid printed circuit board (PCB), its uper side surface are provided with at least one first conductive junction point; One soft printed circuit board is fixed on this rigid printed circuit board (PCB), and its bottom side surface is provided with at least one second conductive junction point, and this second conductive junction point is positioned on first conductive junction point of this rigid printed circuit board (PCB); One decoder is located on this rigid printed circuit board (PCB), is electrically connected on above-mentioned two conductive junction points, and when this decoder detected this two conductive junction points mutual conduction, this decoder can produce a corresponding push button signalling; One separator is located between this rigid printed circuit board (PCB) and this soft printed circuit board, makes and produces a spacing between this first conductive junction point and this second conductive junction point; And a press button mechanism, be fixed on this soft printed circuit board in the mode that can press up and down; Wherein when this press button mechanism is pressed downwards, the bottom of this press button mechanism can press second conductive junction point of this soft printed circuit board downwards, make this second conductive junction point touch first conductive junction point of this rigid printed circuit board (PCB) downwards, thereby and make the connection of two conductive junction points trigger this key device.
The present invention also provides a kind switching device, and it includes: a rigid printed circuit board (PCB), its uper side surface are provided with at least one first conductive junction point; One soft printed circuit board is fixed on this rigid printed circuit board (PCB), and its bottom side surface is provided with at least one second conductive junction point, and this second conductive junction point is positioned on first conductive junction point of this rigid printed circuit board (PCB); One decoder is located on this rigid printed circuit board (PCB), is electrically connected on above-mentioned two conductive junction points, and when this decoder detected this two conductive junction points mutual conduction, this decoder can produce a corresponding push button signalling; One separator is located between this rigid printed circuit board (PCB) and this soft printed circuit board, makes and produces a spacing between this first conductive junction point and this second conductive junction point; When wherein touching first conductive junction point of this rigid printed circuit board (PCB) downwards,, this two conductive junction point touches this switching device thereby being connected when stressed the pressing down of second conductive junction point of this soft printed circuit board.
The present invention also provides a kind of key device that is used for a computor-keyboard, and it includes: a keycap; One rigid printed circuit board (PCB) is located under this keycap, and its uper side surface is provided with two adjacent but unconnected conducting end; One decoder is located on this rigid printed circuit board (PCB), is electrically connected on this two conducting end, and when this decoder detected this two conducting end mutual conduction, this decoder can produce a corresponding push button signalling; One scissor support is fixed on this keycap on this rigid printed circuit board (PCB) in the mode that can press up and down; One flexible member is located between this keycap and this rigid printed circuit board (PCB), and the inboard of this flexible member is provided with a conducting strip, and this conducting strip is positioned on two conducting end of this rigid printed circuit board (PCB); Wherein when this keycap is pressed downwards, this two conducting end is connected triggered this key device.
Below in conjunction with accompanying drawing, describe embodiments of the invention in detail, wherein:
Fig. 1 is the schematic diagram of existing computor-keyboard;
Fig. 2 is the cutaway view of Fig. 1 computor-keyboard along tangent line 2-2;
Fig. 3 is the schematic diagram of the existing key device part body of another kind of Fig. 1 computor-keyboard;
Fig. 4 is the schematic diagram of computor-keyboard of the present invention;
Fig. 5 is the cutaway view of Fig. 4 computor-keyboard along tangent line 5-5;
Fig. 6 is the schematic diagram of the another kind of key device part body of Fig. 4 computor-keyboard;
Fig. 7 is the schematic diagram of the third key device part body of Fig. 4 computor-keyboard;
Fig. 8 is the schematic diagram of the 4th kind of key device part body of Fig. 4 computor-keyboard;
Fig. 9 is the schematic diagram of the 5th kind of key device part body of Fig. 4 computor-keyboard;
Figure 10 is the schematic diagram of the 6th kind of key device part body of Fig. 4 computor-keyboard.
See also Fig. 4 and Fig. 5, Fig. 4 is the schematic diagram of computor-keyboard 80 of the present invention, and Fig. 5 is the cutaway view of computor-keyboard 80 along tangent line 5-5.Computor-keyboard 80 includes a plastic casing 82, and a plurality of key device 84 is fixed in the plastic casing 82.
It is two adjacent but unconnected conducting end 98 and two leads 100 are electrically connected on two conducting end 98 respectively that the uper side surface 96 of rigid printed circuit board (PCB) 86 is provided with.The bottom side surface 102 of soft printed circuit board 88 is provided with on two conducting end 98 that a conducting strip 104 is positioned at rigid printed circuit board (PCB) 86.Softening sheet 106 is provided with a hole 108 between conducting strip 104 and two conducting end 98, and the thickness of softening sheet 106 makes between conducting strip 104 and two conducting end 98 and produced a spacing.Be located at thermmohardening cementing layer 95 under the situation that two printed circuit board (PCB)s 86,88 replace softening sheet 106, thermmohardening cementing layer 95 also is provided with a hole on the position of the hole 108 of former softening sheet 106, making between two printed circuit board (PCB)s 86,88 has a spacing.When keycap 90 was pressed downwards, the bottom of flexible member 94 can press the conducting strip 104 of soft printed circuit board 88 downwards, it is produced with two conducting end 98 of rigid printed circuit board (PCB) 86 be electrically connected.
The uper side surface of rigid printed circuit board (PCB) 86 or bottom side surface are established the required electronic component of keyboard in addition, this sentences bottom side surface and welds a decoder 110 and be example, be electrically connected on two leads 100 and conducting end 98, when decoder 110 detected two conducting end, 98 mutual conduction, decoder 110 can produce a corresponding push button signalling.
See also Fig. 6, Fig. 6 is the schematic diagram of another kind of key device 120 part bodies of computor-keyboard 80.Key device 120 includes a rigid printed circuit board (PCB) 122, and a soft printed circuit board 124 is fixed on the rigid printed circuit board (PCB) 122 in the mode of pasting or thermmohardening is glued together.The bottom side surface 126 of soft printed circuit board 124 is provided with an insulating barrier 128, be separator altogether, mode with printing is printed on the bottom side surface 126 of soft printed circuit board 124 and around conducting strip 130, insulating barrier 128 protrudes from the bottom side surface 126 of soft printed circuit board 124, therefore makes between conducting strip 130 and two conducting end 132 to be produced a spacing.
The uper side surface of rigid printed circuit board (PCB) 122 or bottom side surface are provided with a decoder 134 in addition, are electrically connected on two leads 136 and conducting end 132, and when decoder 134 detected two conducting end, 132 mutual conduction, decoder 134 can produce a corresponding push button signalling.
Because the conducting strip 104,130 on the bottom side surface 102,126 of soft printed circuit board 88,124 only occupies very little area, the volume of flexible member 94 can be dwindled when design needs, and the volume of key device 84,120 can be relative dwindle, so can improve its sense of touch.In addition, rigid printed circuit board (PCB) 86,122 has sturdy structure, and the support in the time of can providing button 90 to press down also can be welded required electronic component on it, and for example decoder 110,134, therefore can produce decoded push button signalling.
See also Fig. 7, Fig. 7 is the schematic diagram of the third key device 140 part bodies of computor-keyboard 80.Key device 140 includes scissor scaffold bracket 151, one rigid printed circuit board (PCB)s 142 and is fixed on scissor scaffold bracket 151 times, and a soft printed circuit board 144 is fixed between scissor scaffold bracket 151 and the rigid printed circuit board (PCB) 142.The uper side surface 146 of rigid printed circuit board (PCB) 142 is provided with one first conductive junction point 148, the bottom side surface 150 of soft printed circuit board 144 be provided with one second conductive junction point 152 be positioned at first conductive junction point 148 directly over.Be provided with an insulating barrier 154 on the bottom side surface 150 of soft printed circuit board 144 in addition, it is a separator, with the printing mode be printed on the bottom side surface 150 of soft printed circuit board 144 and be centered around second conductive junction point 152 around, insulating barrier 154 protrudes from the bottom side surface 150 of soft printed circuit board 144, therefore makes between two conductive junction points 148,152 to be produced a spacing.Be provided with a thermmohardening cementing layer 143 between scissor scaffold bracket 151 and the soft printed circuit board 144, soft printed circuit board 144 is provided with a plurality of openings 173, when thermmohardening cementing layer 143 carries out thermosol, not only scissor scaffold bracket 151 can be bonded on the soft printed circuit board 144, and thermmohardening cementing layer 143 also can be bonded in scissor scaffold bracket 151 times with rigid printed circuit board (PCB) 142 by the opening on the soft printed circuit board 144 173.
Rigid printed circuit board (PCB) 142 is provided with at least one lead 158 and is electrically connected on first conductive junction point 148, also is provided with at least one lead 156 on the soft printed circuit board 144 and is electrically connected on second conductive junction point 152.Be provided with a decoder 160 on the rigid printed circuit board (PCB) 142 in addition, be electrically connected on two conductive junction points 148,152 and two leads 158,156, when decoder 160 detected two conductive junction points, 148,152 mutual conduction, decoder 160 can produce a corresponding push button signalling.
See also Fig. 8, Fig. 8 is the schematic diagram of the 4th kind of key device 170 part bodies of computor-keyboard 80.The difference of key device 170 and key device 140 is that it includes a softening sheet 172 and is located between the uper side surface 146 of the bottom side surface 150 of soft printed circuit board 144 and rigid printed circuit board (PCB) 142, is used for replacing insulating barrier 154.Softening sheet 172 is provided with a plurality of openings 175, and a hole 174 is positioned at second conductive junction point 152 times, and it can make between second conductive junction point 152 and first conductive junction point 148 and be produced a spacing.Also be provided with a plurality of openings 173 on the soft printed circuit board 144, correspond to each opening 175 of softening sheet 172.When thermmohardening cementing layer 143 carries out thermosol, not only scissor scaffold bracket 151 can be bonded on the soft printed circuit board 144, and thermmohardening cementing layer 143 also can be bonded in scissor scaffold bracket 151 times with rigid printed circuit board (PCB) 142 by the opening 173,175 on soft printed circuit board 144 and the softening sheet 172.
In addition, thermmohardening cementing layer 143 also can be located between soft printed circuit board 144 and the softening sheet 172 or between softening sheet 172 and the rigid printed circuit board (PCB) 142, and is bonded together by opening 173,175 devices that each layer is different on soft printed circuit board 144 and the softening sheet 172.Also can directly replace softening sheet 172 when thermmohardening cementing layer 143 reaches a predetermined thickness and make two printed circuit board (PCB)s 142,144 produce a spacing, and reach the function of bonding each bed device.
See also Fig. 9, Fig. 9 is the schematic diagram of the 5th kind of key device 180 part bodies of computor-keyboard 80.Key device 180 includes a keycap 183, one rigid printed circuit board (PCB) 182 is located at keycap 183 times, one scissor scaffold bracket 191 is fixed on the rigid printed circuit board (PCB) 182, one scissor support 185 is fixed on keycap 183 on the rigid printed circuit board (PCB) 182 in the mode that can press up and down, and one flexible member 181 be located between keycap 183 and the rigid printed circuit board (PCB) 182, be used for flexibly to upper support keycap 183.Be provided with a thermmohardening cementing layer 193 between scissor scaffold bracket 191 and the rigid printed circuit board (PCB) 182, be used for when thermosol, scissor scaffold bracket 191 being bonded on the rigid printed circuit board (PCB) 182, and a plurality of support foot rests 195 on the scissor scaffold bracket 191 are used for the scissor support 185 of support.
Rigid printed circuit board (PCB) 182 uper side surfaces 184 are provided with two adjacent but unconnected conducting end 186, and two leads 188 are electrically connected on two conducting end 186 respectively.The inside bottom surface 194 of flexible member 181 is provided with the top that a conducting strip 190 is positioned at two conducting end 186.
Be provided with a decoder 196 on the rigid printed circuit board (PCB) 182 in addition, be electrically connected on two conducting end 186, when flexible member 181 is pressed downwards, conducting strip 190 can touch in two conducting end 186 with conducting two conducting end 186, when decoder 196 detected two conducting end 186 and has been switched on, decoder 196 can produce a corresponding push button signalling.
See also Figure 10, Figure 10 is the schematic diagram of the 6th kind of key device 200 part bodies of computor-keyboard 80.Key device 200 is that with the difference of key device 180 key device 200 does not have scissor scaffold bracket 191, but a plurality of predetermined openings 202 are set on rigid printed circuit board (PCB) 182, support foot rest 195 directly is fixed on the rigid printed circuit board (PCB) 182 in modes such as welding, screw closures, comes the scissor support 185 of support.Also this mode can be implemented among the embodiment with soft printed circuit board herein, as long as offering the predetermined openings that corresponds on the rigid printed circuit board (PCB) on the soft printed circuit board, then also the support foot rest directly can be fixed on the rigid printed circuit board (PCB) via this predetermined openings.
Compare with existing computor-keyboard 10, key device 84 on the computor-keyboard 80,120,140,170,180,200 include rigid printed circuit board (PCB) 86,122,142,182, because the material of rigid printed circuit board (PCB) is very firm, no longer need to install the support base plate on the computor-keyboard 80, also required electronic component can be installed on the rigid printed circuit board (PCB), for example decoder 110,134,160,196, therefore computor-keyboard 80 can be combined whole keypress function, can be in key device 84,120,140,170,180,200 are pressed the back produces decoded push button signalling.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to claim letter lid scope of the present invention.
Claims (23)
1. key device that is used for a computor-keyboard, it includes:
One rigid printed circuit board (PCB), its uper side surface are provided with at least one first conductive junction point;
One soft printed circuit board is fixed on this rigid printed circuit board (PCB), and its bottom side surface is provided with at least one second conductive junction point, and this second conductive junction point is positioned on first conductive junction point of this rigid printed circuit board (PCB);
One decoder is located on this rigid printed circuit board (PCB), is electrically connected on above-mentioned two conductive junction points, and when this decoder detected this two conductive junction points mutual conduction, this decoder can produce a corresponding push button signalling;
One separator is located between this rigid printed circuit board (PCB) and this soft printed circuit board, makes and produces a spacing between this first conductive junction point and this second conductive junction point; And
One press button mechanism is fixed on this soft printed circuit board in the mode that can press up and down;
Wherein when this press button mechanism is pressed downwards, the bottom of this press button mechanism can press second conductive junction point of this soft printed circuit board downwards, make this second conductive junction point touch first conductive junction point of this rigid printed circuit board (PCB) downwards, thereby and make the connection of two conductive junction points trigger this key device.
2. key device as claimed in claim 1, wherein this rigid printed circuit board (PCB) is provided with at least one lead and is electrically connected on this first conductive junction point.
3. key device as claimed in claim 1, wherein this soft printed circuit board is provided with at least one lead and is electrically connected on this second conductive junction point.
4. key device as claimed in claim 1, wherein this press button mechanism includes a keycap, one scissor scaffold bracket is fixed on this soft printed circuit board, one scissor is placed on this scissor scaffold bracket, in the mode that can press up and down this keycap is fixed on this scissor scaffold bracket, wherein when this keycap is pressed downwards, this two conductive junction point is connected triggered this key device.
5. key device as claimed in claim 4, wherein this key device also comprises the support foot rest with respect to this scissor support, in order to this scissor support of support, this support foot rest is fixed on this rigid printed circuit board (PCB).
6. key device as claimed in claim 4, wherein this key device also comprises a flexible member, this flexible member is arranged between this keycap and this keycap and this soft printed circuit board, wherein when this keycap is pressed downwards, the bottom of this flexible member can press second conductive junction point of this soft printed circuit board downwards, thereby thereby touches first conductive junction point of this rigid printed circuit board (PCB) and this two conductive junction point is connected trigger this key device.
7. key device as claimed in claim 4, wherein between this soft printed circuit board and this scissor scaffold bracket, has a thermmohardening cementing layer, this soft printed circuit board is provided with predetermined hole on preposition, this thermmohardening cementing layer can be by this predetermined hole should scissor scaffold bracket and this soft printed circuit board be fixed on this rigid printed circuit board (PCB).
8. key device as claimed in claim 4, wherein between this soft printed circuit board and rigid printed circuit board (PCB), has a thermmohardening cementing layer, this soft printed circuit board is provided with predetermined hole on the precalculated position, this thermmohardening cementing layer can be by this predetermined hole should scissor scaffold bracket and this soft printed circuit board be fixed on this rigid printed circuit board (PCB).
9. key device as claimed in claim 1, wherein this separator is printed on the bottom side surface of this soft printed circuit board and around this second conductive junction point in the mode of printing, this separator protrudes from the bottom side surface of this soft printed circuit board, therefore makes between this second conductive junction point and this first conductive junction point to be produced a spacing.
10. key device as claimed in claim 1, wherein this separator is the bottom side surface that a softening sheet is located at this soft printed circuit board, which is provided with a hole and be positioned under this second conductive junction point, the thickness of this separator itself makes between this second conductive junction point and this first conductive junction point and is produced a spacing.
11. a switching device, it includes:
One rigid printed circuit board (PCB), its uper side surface are provided with at least one first conductive junction point;
One soft printed circuit board is fixed on this rigid printed circuit board (PCB), and its bottom side surface is provided with at least one second conductive junction point, and this second conductive junction point is positioned on first conductive junction point of this rigid printed circuit board (PCB);
One decoder is located on this rigid printed circuit board (PCB), is electrically connected on above-mentioned two conductive junction points, and when this decoder detected this two conductive junction points mutual conduction, this decoder can produce a corresponding push button signalling; And
One separator is located between this rigid printed circuit board (PCB) and this soft printed circuit board, makes and produces a spacing between this first conductive junction point and this second conductive junction point;
When wherein touching first conductive junction point of this rigid printed circuit board (PCB) downwards,, this two conductive junction point touches this switching device thereby being connected when stressed the pressing down of second conductive junction point of this soft printed circuit board.
12. switching device as claimed in claim 11, wherein this rigid printed circuit board (PCB) is provided with at least one lead and is electrically connected on this first conductive junction point.
13. switching device as claimed in claim 11, wherein this soft printed circuit board is provided with at least one lead and is electrically connected on this second conductive junction point.
14. switching device as claimed in claim 11, wherein this soft printed circuit board is fixed on this rigid printed circuit board (PCB) in the mode of pasting.
15. switching device as claimed in claim 11, wherein this soft printed circuit board is fixed on this rigid printed circuit board (PCB) in the mode of thermmohardening gummed.
16. switching device as claimed in claim 11, wherein this separator is printed on the bottom side surface of this soft printed circuit board and around this second conductive junction point in the mode of printing, this separator protrudes from the bottom side surface of this soft printed circuit board, therefore makes between this second conductive junction point and this first conductive junction point to be produced a spacing.
17. switching device as claimed in claim 11, wherein this separator is the bottom side surface that a softening sheet is located at this soft printed circuit board, which is provided with a hole and be positioned under this second conductive junction point, the thickness of this separator itself makes between this second conductive junction point and this first conductive junction point and is produced a spacing.
18. a key device that is used for a computor-keyboard, it includes:
One keycap;
One rigid printed circuit board (PCB) is located under this keycap, and its uper side surface is provided with two adjacent but unconnected conducting end;
One decoder is located on this rigid printed circuit board (PCB), is electrically connected on this two conducting end, and when this decoder detected this two conducting end mutual conduction, this decoder can produce a corresponding push button signalling,
One scissor support is fixed on this keycap on this rigid printed circuit board (PCB) in the mode that can press up and down;
One flexible member is located between this keycap and this rigid printed circuit board (PCB), and the inboard of this flexible member is provided with a conducting strip, and this conducting strip is positioned on two conducting end of this rigid printed circuit board (PCB);
Wherein when this keycap is pressed downwards, this two conducting end is connected triggered this key device.
19. key device as claimed in claim 18, wherein this rigid printed circuit board (PCB) is provided with two leads and is electrically connected on this two conducting end respectively.
20. key device as claimed in claim 18, wherein this key device also comprises the support foot rest with respect to this scissor support, in order to this scissor support of support.
21. key device as claimed in claim 20, wherein this support foot rest is fixed on this rigid printed circuit board (PCB).
22. key device as claimed in claim 18, wherein this key device also comprises a scissor scaffold bracket, is fixed on this rigid printed circuit board (PCB), has the support foot rest with respect to this scissor support on it, in order to this scissor support of support.
23. key device as claimed in claim 22, wherein this scissor scaffold bracket is fixed on this rigid printed circuit board (PCB) in the mode of thermmohardening gummed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00117646 CN1200439C (en) | 2000-05-25 | 2000-05-25 | Key unit for keyboard of computer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00117646 CN1200439C (en) | 2000-05-25 | 2000-05-25 | Key unit for keyboard of computer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1326205A CN1326205A (en) | 2001-12-12 |
| CN1200439C true CN1200439C (en) | 2005-05-04 |
Family
ID=4586971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00117646 Expired - Lifetime CN1200439C (en) | 2000-05-25 | 2000-05-25 | Key unit for keyboard of computer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1200439C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100530032C (en) * | 2006-04-05 | 2009-08-19 | 鸿富锦精密工业（深圳）有限公司 | Main board |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5760670B2 (en) | 2011-05-13 | 2015-08-12 | 沖電気工業株式会社 | Key switch structure |
| CN110189950B (en) * | 2019-05-23 | 2021-06-08 | 苏州达方电子有限公司 | Key structure |
| CN113035626A (en) * | 2020-12-22 | 2021-06-25 | 贵州航天凯山石油仪器有限公司 | Method for manufacturing ultrathin keyboard on control panel of oil field low-voltage testing instrument |
-
2000
- 2000-05-25 CN CN 00117646 patent/CN1200439C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100530032C (en) * | 2006-04-05 | 2009-08-19 | 鸿富锦精密工业（深圳）有限公司 | Main board |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1326205A (en) | 2001-12-12 |
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Granted publication date: 20050504 |