WO2007137492A1

WO2007137492A1 - Key encoder input module

Info

Publication number: WO2007137492A1
Application number: PCT/CN2007/001577
Authority: WO
Inventors: Feng Chen
Original assignee: Feng Chen
Priority date: 2006-05-18
Filing date: 2007-05-15
Publication date: 2007-12-06
Also published as: CN101438226B; CN101438226A

Abstract

A key encoder input module for keyboard which transmitting signal with light, and the cost of manufacture is low. The key encoder input module includes circuit controller, keycap which setup on casing and connected with elastomer, multiple signal emitters and receivers. The key encoder input module also includes a light splitter, a key optical switch is set under the keycap, signal sent by the signal emitter corresponds to the light input port of the light splitters through key light switch, a light encoder is formed between the light splitters and receivers by connecting them with the light path of the light splitters. When a keycap is pressed, signal emitter conducts with the light path of receiver and forms light splitting path after passing the key light switch and light splitter which performing permutation and combination to light path, and light encoder outputs a set of key code signal corresponding to the key position of the keycaps to the input circuit controller. The key encoder input module has the advantages of that the configuration is simple, the cost is basically equal to the traditional keyboard, and the number of photocells used is small. For example, the computer keyboard usually needs a phototranslating circuit with 5 sets of receivers, and produces 25 key codes, namely 32 sets of key codes. And the receiver does not need to directly correspond to light switch of keys in rows. The phototranslating circuit including receivers may be set on the same printed plate with emitters and main control chip. The key encoder input module has the advantages that the configuration of circuit is tight and simple, the cost of production is low, and it is easy to organize batch production. It is convenient to take steps to pressurize a bit of printed plate, so that the keyboard is wholly rainproof, even may be used in water. The key encoder input module can be widely used in computer keyboards, IC card phone keyboards, cash disponser keyboards, various household appliances remote controllers, phone keyboards, function switches and thin film seitch, etc.

Description

Key encoder input module TECHNICAL FIELD

The invention relates to a signal transmission module for a keyboard, in particular an input module for signal transmission using light. Background technique

The existing key encoder input module, as shown in FIG. 11, uses a key reflection photoelectric switch circuit. When the button is pressed, the key reflection surface reflects the different frequency signals emitted by the line signal transmitter to the column receiver, and then the input The circuit controller processes to obtain a corresponding key code signal for each position key. In order to distinguish the key codes of each key, each column must have a set of column receivers with photoelectric conversion circuits directly corresponding to the key reflection surface. Taking a computer keyboard as an example, in the case of a total of 6 rows and 21 columns, the scheme requires a total of 21 column receivers (including 21 sets of photoelectric conversion circuits) correspond to the key reflection surfaces of the buttons. This technical solution only has a fixed length of about 400 legs for the printed boards required for the 21 sets of receivers, and 21 sets of photoelectric conversion circuits. The solution requires a large number of components, a large circuit and a complicated structure, high production cost, difficulty in taking waterproof measures, and difficulty in organizing mass production. The production cost is several times that of a conventional keyboard, which seriously affects the promotion and use of the photoelectric keyboard.

Summary of the invention

The technical problem to be solved by the present invention is to provide a key encoder input module with low manufacturing cost.

The technical solution adopted by the present invention to solve the technical problem is that the key encoder input module comprises an input circuit controller, a key cap disposed on the casing and connected with an elastic body, a signal transmitter and a receiver, and the feature is: The utility model further comprises a beam splitter, wherein the key light switch is arranged under the key cap, the signal emitted by the signal transmitter corresponds to the light input end of the light splitter through the key light switch, and the optical splitter communicates with the optical path of the receiver to form an optical encoder; When depressed, the signal transmitter forms a beam splitting path by connecting the optical switch and the optical splitter that combines the optical paths, and the optical encoder outputs a set of key points corresponding to the key of the keycap to the input circuit controller. Key code signal.

Further, a signal transmitter is disposed in each row, and the reflected light signal corresponding to each column of the optical splitter 18 through the optical input end is split, and the formed one or more split optical paths are respectively formed with one or more The optical path of the receiver is turned on, and the optical fiber path formed by the key switch of the same column has the same arrangement relationship with the receiver, and the corresponding arrangement relationship between the beam splitting optical path formed by the switch light switches of different columns and the receiver is different.

Further, in the above technical solution, the key optical switch is composed of a key reflection surface optical switch, a key blocking surface optical switch or a displacement optical optical switch corresponding to the optical input end of the optical splitter and the optical signal emitted by the signal transmitter. .

Further, the spectroscope is formed by one or more unit reflecting surfaces respectively constituting the key reflecting surface and corresponding to the receiver, and the unit reflecting surface reflects the light from the emitter to the receiver. Spectral light path.

Further, the beam splitter adopts one or more transparent prisms, planar light guides, optical fibers or light groove reflecting surfaces which are arranged in a certain correspondence relationship and respectively correspond to the key optical switch and the receiver.

Further, the extension portion disposed under the keycap and linked with the keycap constitutes a key reflection surface optical switch.

Further, an extension portion disposed under the keycap and linked with the keycap is located between the tree-shaped split photon light guide and the end faces of the tree-shaped incident light guide and forms a key stop light surface optical switch.

1

Confirmation Further, an extension disposed under the keycap and linked with the keycap is fixedly connected to a free end of the tree-shaped split photon lightguide or the tree-shaped incident sub-lightguide, the free end respectively corresponding to the tree-shaped incident sub-lightguide or tree The end face of the photon light guide corresponds to the displacement optical fiber switch; one end of the plurality of tree-shaped split photon light guides intersects with the tree-shaped split light guide, and the other end corresponds to the front end of the tree-shaped incident light guide, and the front end of the tree-shaped split light guide The signal emitter corresponds to; the end of the plurality of tree-shaped incident sub-light guides meets with the tree-shaped incident main light guide, and the end of the tree-shaped incident main light guide corresponds to the light input end of the optical splitter.

The positive effects of the present invention are as follows: It has the advantages of simple structure, substantially equivalent cost, and a small number of optoelectronic components. Taking a computer keyboard as an example, usually only need to have 5 sets of receiver photoelectric conversion circuits, generate 2 5th power key codes, a total of 32 sets of key codes, and the receiver does not need to directly correspond to the column switch optical switches, including The photoelectric conversion circuit of the receiver can be disposed on the same printed board as the transmitter and the main control chip, and has the advantages of compact and simple circuit structure, low production cost, easy organization and mass production, and can be conveniently printed on a small piece. The board is sealed to achieve the overall waterproofing of the keyboard and can even be used in water. The key encoder input module can be widely used in computer keyboards,

IC card phone keypad, cash dispenser keyboard, various household appliances remote control, telephone keypad, function switch, membrane switch and other fields.

DRAWINGS

Figure 1 is a front view of the present invention;

Figure 2 is a cross-sectional view taken along line A-A of Figure 1 when the key optical switch under the button is a reflecting surface;

Figure 3 is a third layer of light guide of the planar light guide of the present invention;

Figure 4 is a second layer of light guide of the planar light guide of the present invention;

Figure 5 is a first layer of light guide of the planar light guide of the present invention;

Figure 6 is a diagram of a multi-column, multi-row key position of the present invention;

Figure 7 is a beam splitter formed by the optical fiber of the present invention;

Figure 8 is a beam splitter formed by the prism of the present invention;

Figure 9 is a beam splitter formed by the light reflecting surface of the present invention;

Figure 10 is a beam splitter formed by the tree light guide of the present invention;

Figure 11 is a beam splitter formed by the unit reflecting surface of the present invention;

Figure 12 is a beam splitter formed by a unit reflecting surface of a single emitter of the present invention;

Figure 13 is a cross-sectional view taken along line A-A of Figure 1 when the key optical switch under the button is a light blocking surface;

Figure 14 is a schematic diagram of the on/off of the optical switch of the present invention;

Figure 15 is a cross-sectional view taken along line B-B of Figure 14;

Figure 16 is a conventional key reflection surface, multi-receiver scheme;

Figure 17 is a photoelectric conversion circuit used in the present invention.

detailed description

As shown in FIG. 1 to FIG. 16, the key encoder input module of the present invention comprises an input circuit controller, a keycap 1 disposed on the casing and connected with the elastic body 7, a signal transmitter 11, and a plurality of receivers 20. And the optical splitter 18, a key optical switch is disposed under the keycap 1, and the signal emitted by the signal transmitter 11 passes through the optical switch 15 and the optical input end 15 of the optical splitter 18. Correspondingly, the optical splitter 18 and the receiver 20 communicate with each other through the optical path of the optical splitter 18 to form an optical encoder 19; when the keycap 1 is depressed, the signal transmitter 11 combines the optical splitter and the splitter that combines the optical paths. After 18, the light path is turned on with the receiver 20 to form a beam splitting optical path 16, and the optical encoder 19 outputs a set of key code signals corresponding to the key positions of the keycap 1 to the input circuit controller. The position of each different key position is distinguished by a set of key code signals, thereby effectively reducing the number of photoelectric originals and achieving the purpose of reducing the manufacturing cost.

For a common computer keyboard, the number of rows is much smaller than the number of columns. In order to further reduce the number of photoelectric elements, a signal emitter 11 may be disposed in each row, and a reflected light signal corresponding to each column of the beam splitter 18 through the light input terminal 15 may be split after the split light signal is split. Or the plurality of splitting optical paths 16 are respectively electrically connected to the optical path of the one or more receivers 20, and the corresponding arrangement relationship between the optical splitting optical path 16 of the same column and the receiver 20 is the same, and the corresponding arrangement relationship between the split optical paths 16 of the different columns and the receiver 20 is not In the same way, a set of key code signals corresponding to the key positions of the keycap 1 are obtained by combining the optical path arrangements, and the positions of the respective different key positions are distinguished.

The key optical switch is composed of a key reflecting surface optical switch, a key blocking surface optical switch or a displacement optical optical switch corresponding to the optical input end 15 of the spectroscope 18 and the optical signal emitted from the signal transmitter 11.

The beam splitter 18 is formed by one or more unit reflecting surfaces 33 respectively constituting the key reflecting surface optical switch and corresponding to the receiver 20, and the unit reflecting surface 33 reflects the light from the emitter 11 to The receiver 20 forms a spectroscopic optical path 16. At this time, the unit reflecting surface 33 functions as both the key reflecting surface optical switch and the beam splitter 18.

The spectroscope 18 is formed by one or more transparent prisms 27, a planar light guide, an optical fiber 26 or a light reflecting surface 30 which are arranged in a corresponding correspondence and respectively correspond to the key optical switch and the receiver 20.

In the above technical solution, an extension portion disposed under the keycap 1 and interlocking with the keycap 1 may be used as a key reflection surface optical switch, or an extension portion 13 disposed under the keycap 1 and linked with the keycap 1 may be located in the tree. The split photon light guide 36 and the two ends of the tree incident sub-light guide 38 form a key stop light surface switch.

In the above technical solution, the extending portion 13 disposed under the keycap 1 and interlocking with the keycap 1 is fixedly connected to a free end of the tree-shaped split photon light guide 36 or the tree-shaped incident sub-light guide 38, and the free end is respectively associated with the tree-shaped incident sub- The end faces of the light guide 38 or the tree-shaped split photon light guide 36 correspond to the displacement fiber optic switch; one end of the plurality of tree-shaped split photon light guides 36 intersects with the tree-shaped split light guide 35, and the other end of which is adjacent to the front end of the tree-shaped incident sub-light guide 38 Correspondingly, the front end of the tree-shaped splitting main light guide 35 corresponds to the signal emitter 11; the ends of the plurality of tree-shaped incident sub-light guides 38 intersect with the tree-shaped incident main light guide 37, and the end of the tree-shaped incident main light guide 37 and the light of the beam splitter 18 The input terminal 15 corresponds.

In the above technical solution, the beam splitting optical path 16 may be formed by the one or more unit reflecting surfaces 33 on the extending portion 13 to reflect the optical signal of the transmitter 11 to the receiver 20; respectively, the reflecting surface may be reflected by the extending portion 13 a light-receiving surface of the extending portion 13 , a tree-shaped split photon light guide 36 connected to the extending portion 13 or a free end of the tree-shaped incident sub-light guide 38 respectively reflecting or conducting the optical signal to the emitter 11 to the optical path of the receiver 20 The light input end 15 of the turned-on beam splitter 18 is split by the beam splitter 18.

Example 1

Referring to Figures 1 and 2, the present invention consists of a horizontally arranged button, a signal transmitter 11, an elastomer 7, a housing, and an extension. 13. The optical encoder 19, the photoelectric input circuit controller (not shown), and the like.

Referring to Fig. 1 and Fig. 2, panel 3 has a concave shape in the middle, and a panel through hole 9 is evenly arranged on the concave bottom surface 4 which is square in the middle portion. The bottom plate 6 has a flat plate shape, and the panel 3 and the bottom plate 6 are connected by four uprights 5 to form a hollow housing having parallel plates, and a signal transmitter 11 and a receiver are respectively mounted on the lower surface near the left portion of the bottom plate 6. The left vertical panel 12 of 20.

Referring to FIG. 1, the keycap 1 and the upper portion of the key guide body 2 are fixedly connected to form a button, the bottom surface of the elastic body 7 is connected to the upper surface of the bottom plate 6, and the upper portion thereof is connected to the bottom surface of the shoulder 10 of the key guide body 2, and the key guide body 2 is connected. The outer surface of the upper middle portion is slidably engaged with the panel through hole 9 on the panel 3, and the upper surface of the shoulder 10 is pressed against the lower surface of the depressed bottom surface 4 under the elastic force of the elastic body 7.

Referring to the left and right extensions of the shoulder 10 of the key guide body 2 of the horizontally arranged keys of Figs. 1, 2, there is an extension portion 13, and the extension portion 13 of the shoulder 10 penetrates through the through hole of the upper portion of the elastic body 7 into the bottom plate. Through the hole 8.

Referring to Fig. 1, when the upper surface of the shoulder 10 is pressed against the lower surface of the concave bottom surface 4, the plane of the axis of the transmitting and receiving signals of the receiver 20 and the signal transmitter 11 is lower than the longitudinally and horizontally extending portions 13 . The surface of the extension portion 13 corresponding to the signal emitter 11 and the light input end 15 of the planar light guide group is respectively attached with a reflective material to form a reflection surface of the extension portion 13.

The reflecting surfaces of the plurality of extending portions 13 which are arranged horizontally when the buttons are not pressed should not reflect the signal from the signal transmitter 11; when the button is pressed, the signal transmitters 11 of the Y0 and the respective key extensions of the corresponding rows Y0 are respectively 13 reflective surfaces correspond.

The key optical switch is disposed on an optical path that can connect the optical input end 15 of the spectroscope 18 and the optical path of the signal transmitter 11. The key optical switch is a key reflective surface switch, and the key reflective surface switch can be moved up and down by interlocking with the key cap 1. The reflector 13 and the elastic body 7 are respectively formed corresponding to the signal emitter 11 and the light input end 15 of the planar light guide group 15 .

Referring to Fig. 3, the light input end 15 of the planar light guide 22 respectively reflects the extension 13 at XI, X2, X5, X6; its light output end 21 corresponds to the b receiver 20.

Referring to Fig. 4, the light input end 15 of the planar light guide 23 corresponds to the reflecting surface of the key extension portion 13 at X3, X4, X5, X6, respectively; and its light output end 21 corresponds to the a receiver 20.

Referring to Figure 5, the light input end 15 of the planar light guide 24 corresponds to the reflective surface of the key extension 13 at X0, X2, X4, X6, respectively; its optical output 21 corresponds to the c receiver 20.

Referring to FIG. 2, the optical encoder 19 is composed of a receiver 20 and its photoelectric conversion circuit and a beam splitter 18. The beam splitter 18 is composed of a planar light guide 22, a planar light guide 23, and a planar light guide 24, and the plane light guides of the splitter 18 are arranged. The light input ends 15 respectively correspond to the reflecting surfaces of the extending portions 13 in a certain arrangement; the light output ends 21 of the planar light guides of the beam splitter 18 are respectively arranged in one-to-one correspondence with the receivers 20 in a certain arrangement.

Each of the key extensions 13 corresponding to the signal emitter 11 reflects the surface reflection signal to form an input optical signal 14, and the input optical signal 14 is formed in a beam splitter 18 formed by superposing three layers of the planar light guide 22, the planar light guide 23, and the planar light guide 24. Splitting light path 16.

As shown in FIG. 10, the light propagation efficiency is improved, and the planar light guide 22, the planar light guide 23, and the planar light guide 24 can also be used. A cylindrical light guide that resembles a tree. The tree-shaped light guide has a tree-shaped main light guide 32 corresponding to the receiver 20 at one end thereof, and one end of the tree-shaped sub-light guide 31 intersects with the tree-shaped main light guide to form an optical path; the other end, that is, the light input end 15 corresponds to the input optical signal 14. .

The signal transmitter 11 is electrically connected to an input circuit controller (not shown). Referring to Figure 17, the receiver 20 is electrically coupled to an input circuit controller (not shown) via a photo-electric conversion circuit.

When the signal transmitter 11 uses the light wave transmitter, the receiver 20 may be a photosensitive device such as a photoresistor, a photodiode or a phototransistor; when the signal transmitter 11 uses electromagnetic waves and sound waves, the receiver 20 may also use an electromagnetic wave or an acoustic wave sensor. .

When the horizontally arranged keycap 1 is not pressed, the receiver 20 does not receive the signal from the signal transmitter 11; when the keycap 1 at X5 is pressed as an example, when the keycap 1 at X5 is pressed, The keycap 1 pushes the key guide body 2 connected thereto to move downward against the elastic force of the elastic body 7. When the key guide body 2 moves downward by a certain distance, the X5 key extension portion 13 on the key guide body 2 reflects the surface reflection and the key The signal transmitted by the corresponding Y0 signal transmitter 11 is incident on the plane of the key extension 13 at the X5 corresponding to the plane light guide 22 of the beam splitter 18 and the light input end 15 of the planar light guide 23, and the input optical signal 14 is incident on the beam splitter 18. The optical input terminal 15 splits into the beam splitter 18 to form a beam splitting optical path 16 in the planar light guide 22 and the planar light guide 23. Since the planar light guide 22 and the light output end 21 of the planar light guide 23 are respectively connected to the b receiver 20 and the a receiver 20 Correspondingly, the light input to the b receiver 20 and the a receiver 20 is amplified by the photoelectric conversion circuit to output a high level. Since the c receiver 20 has no optical input and the photoelectric conversion circuit connected thereto outputs a low level, the photoelectric conversion circuit will The key code 110 at X5 is input to the circuit controller (not shown).

Key switch optical encoder input module input circuit controller (not shown), according to c, b, a receiver 20 high and low level (011): X5 button 1 press.

According to different combinations of high and low levels of c, b, and a receiver 20, the columns are determined, and the corresponding relationship is as follows

001—X0, 010—XI, Oil—X2, 100—X3, 101—X4, 110--X5, 111—X6 Example 2

Referring to FIG. 13, the signal transmitter 11 corresponds to the front end of the tree-shaped splitting main light guide 35. One end of the plurality of tree-shaped split photon light guides 36 intersects with the tree-shaped splitting main light guide 35, and the other end thereof corresponds to the front end of the tree-shaped incident sub-light guide 38. The end of the tree-shaped incident sub-light guide 38 intersects with the tree-shaped incident main light guide 37, and the end of the tree-shaped incident main light guide 37 corresponds to the light input end 15 of the beam splitter 18; and the movable portion 13 that is movable up and down in conjunction with the key cap 1 The smooth surface is located between the end faces of the dendritic photon beam guide 36 of the tree-shaped split photon light guide 36.

Referring to Fig. 13, there is a flat tree-like structure of a tree-shaped spectroscopic main light guide corresponding to the signal emitter 11 at one end thereof.

35. A tree-shaped spectroscopic light guide formed by a tree-like split photon light guide 36, wherein a plurality of tree-shaped split photon light guides 36 are connected to the tree-shaped split light main guide 35; an erected light having a tree-like structure and having one end thereof and the beam splitter 18 A tree-shaped incident light guide composed of a tree-shaped incident main light guide 37 and a tree-shaped incident sub-light guide 38 corresponding to the input end 15 and a plurality of tree-shaped incident sub-light guides 38 are connected to the tree-shaped incident main light guide 37.

The tree-shaped spectroscopic light guide, the tree-shaped incident light guide may be a light channel light guide, a fiber light guide, a liquid light guide, a planar light guide, or the like. Referring to the key guide body 2 of the horizontally arranged button of Fig. 1, the downward extending portion of the shoulder 10 has an extending portion 13, and the extending portion 13 under the shoulder 10 penetrates through the through hole of the upper portion of the elastic body 7 and penetrates through the bottom plate. Inside the hole 8. Referring to Fig. 13, the extending portion 13 is located between the end faces of the tree-shaped split photon light guide 36 and the tree-shaped incident sub-light guide 38, and one end of the tree-shaped splitting main light guide 35 according to the tree-shaped split light guide and the signal emission Corresponding to the device 11, if one end of the thousand-tree beam splitting optical path 36 intersects with the tree-shaped splitting main light guide 35, the other end of which corresponds to the extension portion 13 under the button; the tree-shaped incident sub-light guide 38 of the tree-shaped incident light guide One end corresponds to the extension 13 under the button, the other end of which coincides with the tree-shaped incident main light guide 37, and the end of the tree-shaped incident main light guide 37 corresponds to the light input end 15 of the beam splitter 18.

The key optical switch is disposed on an optical path that can connect the optical input end 15 of the optical splitter 18 and the optical path of the signal transmitter 11. The key optical switch is a key stop light surface switch, and the key stop light surface switch is a tree corresponding to the two end faces thereof. The split photon light guide 36, the tree-shaped incident sub-light guide 38, and an extension portion 13 located between the end faces thereof and movable up and down in conjunction with the keycap 1 constitutes.

The signal emitted by the signal transmitter 11 is incident on the tree-shaped beam splitting light guide: the light signal propagates along the tree-shaped splitting main light guide 35 and the tree-shaped split photon light guide 36, and is emitted at the end of the tree-shaped split photon light guide 36, when the button is not pressed The optical signal outputted from the end of the tree-shaped photonic light guide 36 corresponding to the extension 13 under the button is blocked by the key extension 13; see Figure 12, when the button at X5 is pressed, the end of the tree-shaped photon light guide 36 The output optical signal is incident on one end of the tree-shaped incident sub-light guide 38. The optical signal is input to the light input end 15 of the beam splitter 18 through the tree-shaped incident sub-light guide 38 and the tree-shaped incident main light guide 37.

The rest is the same as in the first embodiment.

Example 3

Referring to the button 10 of the button, the downward extending portion 13 of the shoulder 10 is fixedly connected to one end of the tree-shaped photonic light guide 36, and the other end of the tree-shaped split photo-guide 36 is merged with the tree-shaped splitting light guide 35. The tree-shaped incident sub-light guide 38 does not correspond to the end face of the tree-shaped split photon light guide 36 when the button is not pressed.

The key optical switch is disposed on an optical path that can connect the optical input end 15 of the optical splitter 18 and the optical path of the signal transmitter 11. The key optical switch is a key shift optical fiber switch, and the key shift optical fiber switch is corresponding to the two end faces when the button is pressed. The tree-shaped split photon light guide 36, the tree-shaped incident sub-light guide 38, and the extension 13 of the fixed-connected tree-shaped split photon light guide 36 can be interlocked with the keycap 1.

Referring to Fig. 15, there is a tree-like spectroscopic light guide composed of a tree-shaped spectroscopic main light guide 35 and a tree-shaped split photon light guide 36 having a flat tree structure and a signal emitter 11 at one end thereof, and a plurality of dendritic photon light guides 36. Intersecting with the tree-shaped splitting main light guide 35; having an erect tree-like structure and having a tree-like incident main light guide 37 and a tree-shaped incident sub-light guide 38 corresponding to the light input end 15 of the spectroscope 18 at one end thereof In the form of incident light guides, a plurality of tree-shaped incident sub-light guides 38 are connected to the tree-shaped incident main light guide 37.

When the button is not pressed, since the tree-shaped split photon light guide 36 does not correspond to the end face of the tree-shaped incident sub-light guide 38, the end-emitting light signal of the tree-shaped split photon light guide 36 cannot enter the end face of the tree-shaped incident sub-light guide 38. When the button is pressed, the extension 13 moves downward together with the tree-shaped split photon light guide 36, and the end face of the tree-shaped split photon light guide 36 corresponds to the end face of the tree-shaped incident sub-light guide 38, and the light signal is input into the tree-shaped incident object. The end face of the light guide 38, the light signal is input to the light input end 15 of the beam splitter 18 along the tree-shaped incident sub-light guide 38 and the tree-shaped incident main light guide 37. The rest is the same as in Embodiment 2.

Example 4

Referring to Fig. 6, the present invention is constituted by a vertically and horizontally arranged button, a signal transmitter 11, an elastic body 7, a housing, a key optical switch, an optical encoder 19, an optoelectronic input circuit controller (not shown), and the like.

On the lower surface near the left portion of the bottom plate 6, there are left vertical plates on which the signal transmitter 11 and the receiver 20 are respectively mounted.

12. When the button is pressed, the signal transmitter 11 of Y0 corresponds to the key optical switch of each key of the corresponding row Y0 (ie, the Y0 signal transmitter 11 corresponds to the key optical switch of each key of Y0, and the Y1 signal is transmitted. The device 11 corresponds to the key optical switch of each of the Y1 keys, and the Y2 signal transmitter 11 corresponds to the key optical switch of each of the Y2 keys).

A fiber receiving tube 24 is mounted on the upper portion of the left vertical plate 12. The optical input end of the optical fiber 25 is located on the right side of the bottom plate 6 and corresponds to the emitter 11. The light output end of the optical fiber 25 corresponds to the e, f, g fiber receiving tube 24, respectively. .

The arrangement of the optical fibers 25 can be arranged in the arrangement of FIG. 6; when the number of rows is large, the spectroscopic arrangement of the embodiment 1 can also be adopted.

Referring to Fig. 6, the fiber receiving tube 24 is electrically connected to the input circuit controller (not shown) via the photoelectric conversion circuit. When the key is not pressed, the key optical switches of the horizontally arranged keys do not form the input optical signal 14 to be pressed by the key cap 1 at X5Y1, and the key of the key at X5Y1 when the keycap 1 at X5Y1 is pressed The optical switch blocks the input light of the Y1 row of optical fibers 25 while the signal from the reflected signal transmitter 11 forms the input optical signal 14, and receives the light through the light guides e and g of the optical fiber 25, and the optical fiber receiving tube 24 receives the light. The light can not be received, and the fiber receiving tube 24 inputs the signal into the circuit controller (not shown) through a conversion circuit (not shown) and inputs the circuit controller (not shown) to determine: the key cap at X5Y1 1 is pressed.

The row key can also be used to distinguish the row keys. The specific mode is that the Y1 signal transmitter 11 emits an optical signal while the input circuit controller (not shown) detects whether each receiver 20 has an encoded input, and if there is a coded input, It is judged that the Y1 line has a key press, the Y1 line scan ends and the Y1 signal transmitter 11 is turned off, and then the Y2 signal transmitter 11 emits an optical signal.

The rest is the same as in the first embodiment

Example 5

Referring to Fig. 7, the optical splitters 18 are respectively arranged by their optical input terminals 15 in a certain arrangement with the key optical switches; the optical output ends 21 are respectively formed by a group of optical fibers 26 corresponding to the receiver 20, and the optical encoder 19 is composed of optical fibers 26 The receiver 20 and its photoelectric conversion circuit and the key optical switch are configured. The optical fiber 26 corresponds to the receiver 20, respectively. When the input optical signal 14 is incident on the end face of the optical fiber 26, that is, the light input end 15, the optical splitting path 16 is formed on the inner surface of the optical fiber 26.

One end of the one or more optical fibers 26 extends through the plate surface of the upright plate 17, respectively corresponding to the input optical signal 14 generated by the switch of each column of the optical switch; the other end of the optical fiber 26 is fixed to the receiver 20 respectively. correspond.

The correspondence between the input optical signal 14 and the receiver 20 is as follows

X0 - input optical signal 14 - optical fiber 26--a receiver 20

XI input optical signal 14 - optical fiber 26 - b receiver 20

X2 input optical signal 14 - optical fiber 26 (two) - - a, b receiver 20 X3 input optical signal 14 - - optical fiber 26 - c receiver 20

X4 input optical signal 14- - optical fiber (two) 26_- a, c receiver 20

X5 input optical signal 14--optical fiber (two) 26-b, c receiver 20

X6 input optical signal 14--optical fiber (叁根) 26 -—- a, b, c receiver 20

The rest is the same as in the first embodiment.

Example 6

Referring to Fig. 8, the optical splitter 18 is composed of a transparent prism 27 whose prism reflecting surface 28 is respectively arranged corresponding to the receiver 20, and the optical encoder 19 is composed of a transparent prism 27, a receiver 20, a photoelectric conversion circuit thereof, and a key optical switch. Composition.

When the input optical signal 14 is incident on the transparent prism 27 at X5-a, X5-b, the input optical signal 14 is incident on the prism reflecting surface 28 to form two beam splitting optical paths 16 corresponding to the a and b receivers 20, and the two beam splitting optical paths 16 are worn. The transparent prism 27 passing through the front enters the a and b receivers 20.

The rest is the same as in the first embodiment.

Example 7

Referring to Fig. 9, the beam splitter 18 is composed of a group of light groove reflecting surfaces 30 and a corresponding arrangement with the receiver 20. The optical encoder 19 is composed of a light groove reflecting surface 30 group, a receiver 20, a photoelectric conversion circuit thereof, and a key optical switch.

The input optical signal 14 is incident on the light reflecting surface 30, and a spectroscopic optical path 16 is formed in the optical groove 29.

The correspondence between the input optical signal 14 and the light reflecting surface 30 is as follows

X0 input optical signal 14 - --- a light groove reflecting surface 30

XI input optical signal 14——b light groove reflection surface 30

X2 input optical signal 14 --- a, b light groove reflection surface 30 (two)

X3 input optical signal 14 c optical groove reflective surface 30

X4 input optical signal 14 - a, c light groove reflection surface 30 (two)

X5 input optical signal 14 -1 - b, c light groove reflection surface 30 (two)

X6 input optical signal 14—— a, b, c light groove reflection surface 30 (叁)

The rest is the same as in the first embodiment.

Example 8

Referring to Fig. 11, the optical splitter 18 is constituted by a unit reflecting surface 33 corresponding to a predetermined arrangement relationship with the receiver 20. The optical encoder 19 is composed of a unit reflecting surface 33, a receiver 20, and a photoelectric conversion circuit thereof.

The unit reflecting surface 33 is constituted by one or more planes of the extending portion 13 to which the light reflecting material is attached corresponding to the signal emitter 11 and the receiver 20, respectively. When the button 1 is pressed, the beam splitting optical path 16 corresponding to the receiver 20 in a certain arrangement relationship is formed so that the number of unit reflecting surfaces in the same column is the same.

The light input end 15 of the beam splitter 18 formed by the unit reflecting surface 33 is the end of the unit reflecting surface 33 corresponding to the signal emitter 11.

The light output end 21 of the spectroscope 18 formed by the unit reflecting surface 33 is the end corresponding to the receiver 20 on the unit reflecting surface 33. When the button is pressed, the key optical switch moves downward, and the signal from the signal transmitter 11 corresponds to the optical input end 15 of the optical splitter 18 formed by the unit reflecting surface 33, and the optical output end 21 of the optical splitter 18 is connected to the receiver 20. Correspondingly, the optical splitter 18 formed by the unit reflecting surface 33 communicates with the optical path of the receiver 20 to form the optical encoder 19; one or more unit reflecting surfaces 33 of the same column should be identical to the one or more receivers 20 respectively; One or more unit reflecting surfaces 33 of different columns are respectively different from one or more receivers 20; each unit reflecting surface 33 reflects one or more beam splitting paths 16 generated by the optical signals of the signal transmitter 11 and respectively One or more receivers 20 - one corresponding.

The key optical switch is a key reflecting surface switch, and the key reflecting surface switch is constituted by a unit reflecting surface 33 on the extending portion 13 corresponding to the signal transmitter 11 and the receiver 20, which are movable up and down in conjunction with the keycap 1.

The reflecting surface 13 of each of the X0 columns has a unit reflecting surface 33 corresponding to the _a receiver 20;

The extending portion 13 of each of the keys of the XI column has a unit reflecting surface 33 corresponding to the b receiver 20;

The reflecting surface 13 of each of the X2 columns has two unit reflecting surfaces 33 corresponding to the _a and b receivers 20, respectively;

The reflecting surface 13 of each of the X3 columns has a unit reflecting surface 33 corresponding to the _c receiver 20; the extending portion 13 of each of the X4 columns has a reflecting surface having two and a and c receivers 20, respectively. a corresponding unit reflecting surface 33;

The extending portion 13 of each of the X5 columns has two reflecting surfaces 33 corresponding to the b, c receivers 20, respectively;

The reflecting surface 13 of each of the X6 columns has a single reflecting surface 33 corresponding to the a, b, c receiver 20-one;

The reflected spectroscopic optical path 16 is formed by a reflected signal from the unit reflecting surface 33. The signal transmitter 11 may be an LED that emits optical signals at different on-off frequencies, or other types of transmitters that emit other different signals.

The signal transmitter 11 transmitting the different frequencies is electrically connected to the photoelectric input circuit controller (not shown).

It is assumed that the Y0 signal transmitter 11 transmits a signal at a 100-on-off frequency, the Y1 signal transmitter 11 transmits a signal at a 200-on-off frequency, and the Y2 signal transmitter 11 transmits a signal at a 300-on-off frequency, and the photoelectric input circuit controller receives the signal according to the received signal. Signal discrimination of the cutoff frequency 300: The button of the Y2 line is pressed.

The rest is the same as in the first embodiment.

Example 9

Referring to Fig. 12, the prism reflecting surface 28a of the transparent prism 27a corresponds to the emitter 11 and the key optical switch respectively. When the button 1 is pressed, the beam splitting optical path 16 corresponding to the receiver 20 is formed in a certain arrangement relationship, and the keys should be made. The correspondence between the unit reflection surface 33 and the receiver 20 is different, so that each key has an independent key code, and the key code of each key is as shown in FIG.

The rest is the same as in the eighth embodiment.

Claims

Claim

1. The key encoder input module comprises an input circuit controller, a key cap (1) disposed on the casing and connected with an elastic body (7), one or more signal transmitters (11), and a plurality of receivers ( 20), characterized in that: further comprising a beam splitter (18), a key optical switch is arranged under the keycap (1), and the signal emitted by the signal transmitter (11) passes through the light input end of the key optical switch and the optical splitter (18) (15) Correspondingly, the optical splitter (18) is connected to the optical path of the receiver (20) to form an optical encoder.

(19); When the keycap (1) is depressed, the signal from the signal transmitter (11) is formed by the optical switch and the optical path of the receiver (20) after being connected by the optical switch and the optical splitter (18). The beam splitting path (16), the optical encoder (19) outputs a set of key code signals corresponding to the key positions of the keycap (1) to the input circuit controller.

2. The key encoder input module according to claim 1, wherein a signal transmitter (11) is disposed in each row, and the optical splitter (18) corresponding to each column passes through the optical input terminal (15) to the key light. After the optical signal of the switch is split, one or more split optical paths (16) are respectively connected to one or more receivers (20), and the split optical path (16) and receiver formed by the same column of optical switches are formed. The corresponding arrangement relationship of (20) is the same, and the corresponding arrangement relationship between the beam splitting optical path (16) formed by the different column key switches and the receiver (20) is different.

3. The key encoder input module according to claim 1 or 2, wherein: the key optical switch is disposed at an optical input end (15) and a signal transmitter (11) optical path capable of causing the optical splitter (18) The key reflection surface light switch, the key block light surface switch or the displacement fiber optical switch on the connected optical path.

4. The key encoder input module according to any one of claims 3, wherein: the optical splitter (18) is arranged in a certain correspondence relationship by one or more of the optical switches constituting the key reflecting surface. Separately with the receiver

(20) The corresponding unit reflecting surface (33), the unit reflecting surface (33) reflects the light from the emitter (11) to the receiver (20) to form a beam splitting path (16).

5. A key encoder input module according to any one of claims 1 to 3, characterized in that - the optical splitter (18) is arranged in one or more corresponding correspondences and respectively associated with the key light The switch and the receiver (20) correspond to a transparent prism (27), a planar light guide, a tree-shaped light guide, an optical fiber (26) or a light groove reflecting surface (30).

The key encoder input module according to claim 3 or 4, characterized in that: the extension portion (13) disposed under the keycap (1) and linked with the keycap (1) constitutes a key reflection surface optical switch .

7. The key encoder input module according to claim 3 or 4, characterized in that: the extension (13) disposed under the keycap (1) and linked to the keycap (1) is located in the tree-shaped photon light guide (36) and a light-blocking surface light switch is formed between the end faces of the tree-shaped incident sub-light guide (38).

8. The key encoder input module according to claim 3 or 4, wherein: the extension portion (13) disposed under the keycap (1) and linked to the keycap (1) is fixedly connected to the tree-shaped photon A free end of the light guide (36) or the tree-shaped incident sub-light guide (38), which respectively corresponds to the end face of the tree-shaped incident sub-light guide (38) or the tree-shaped split photon light guide (36) constitutes a displacement fiber optical switch.

9. The key encoder input module according to claim 7 or 8, wherein: one end of the plurality of dendritic photonic light guides (36) meets with the tree-shaped splitting main light guide (35), and the other end is connected to the tree. The front end of the incident light guide (38) corresponds to the front end of the tree-shaped split light guide (35) corresponding to the signal emitter (11); the end of the plurality of tree-shaped incident sub-light guides (38) and the tree-shaped incident main light guide (37) At the intersection, the end of the tree-shaped incident main light guide (37) corresponds to the light input end (15) of the beam splitter (18).