Grating key with motion vector and grating keyboard

Abstract

The invention discloses a grating key with a moving vector and a grating keyboard, a light path of the grating key adopts a refraction type or a correlation type, the two modes both utilize a mature grating principle and a photoelectric effect, that is, when light is irradiated on a photoelectric converter, the displacement of a moving pressing handle is converted into a pulse digital quantity, and the pulse digital quantity is converted into a pulse digital quantity; therefore, the displacement of the key can be measured according to the pulse digital quantity. The method for measuring and calculating the displacement by utilizing the grating is high in precision and high in response speed, fundamentally solves all defects of measuring and calculating the displacement of the key by utilizing AD conversion analog voltage, is not interfered by temperature, light intensity and magnetic field intensity, can also eliminate assembly errors, and has natural reliability and consistency.

Description

Technical Field

[0001] The invention relates to the field of adjustable travel keyboards, and in particular to a grating key and a grating keyboard with a moving vector. Background Art

[0002] The existing adjustable stroke keyboards, whether using magnetic axis adjustable stroke keys or optical adjustable stroke keys, are inseparable from AD conversion, and the magnetic axis adjustable stroke keys are affected by the magnetic field strength of the magnet, the Hall sensitivity strength, and the influence of temperature on the magnet, and the consistency is poor; and the consistency of the existing optical adjustable stroke keys is also restricted by the sensitivity of the photosensitive element, the intensity of the emitted light, and is also subject to the influence of assembly errors. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art and provide a grating key with a moving vector.

[0004] Another object of the present invention is to provide a grating keyboard.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A grating key with a moving vector, wherein the light path of the grating key adopts a refraction type, and includes a transmitting light guide column and a receiving light guide column that are relatively arranged; wherein a light transmitting unit is arranged below the transmitting light guide column, and the receiving light guide column includes a first receiving light guide column and a second receiving light guide column, and a first light receiving unit and a second light receiving unit are arranged below the first receiving light guide column and the second receiving light guide column respectively; at the same time, a moving handle of the grating key is provided with a grating structure, and the grating structure moves up and down in the gap between the transmitting light guide column and the receiving light guide column along with the moving handle.

[0007] The displacement accuracy of the grating key depends on the grating pitch of the grating structure. The smaller the grating pitch, the higher the displacement accuracy of the grating key. The minimum displacement accuracy of the moving handle is half of the grating pitch. The grating structure can be made of a variety of materials, such as plastic or metal. The grating pitch can be molded or laser engraved according to the accuracy.

[0008] The grating key is a split grating key, and the light emitting unit, the first light receiving unit, and the second light receiving unit are all surface mount electronic components, and are all located on the PCB, and closely cooperate with the key body of the grating key to complete the photoelectric conversion.

[0009] The light emitting unit, the first light receiving unit and the second light receiving unit are all located in the key dustproof cavity, and the dustproof cavity has the function of preventing external light from entering the dustproof cavity.

[0010] The transmitting light guide column continues to extend upward in the area opposite to the receiving light guide column, and part of the light emitted by the light emitting unit is transmitted to the keycap of the grating key through the transmitting light guide column extending upward, and the other part is reflected to the receiving light guide column. At this time, the transmitting light guide column can be used for dual purpose, which can provide light energy for the receiving light guide column and can also be used for lighting indication of the keycap of the grating key.

[0011] The first receiving light guide column and the second receiving light guide column are provided with a fixed light blocking plate in the area opposite to the transmitting light guide column, and the fixed light blocking plate is provided with a light through hole, the spacing of the light through holes is the minimum spacing of the grating structure, and the light through hole is located at the center of the junction of the first receiving light guide column and the second receiving light guide column;

[0012] Alternatively, a fixed light blocking plate is provided in the area opposite to the emitting light guiding column and the first receiving light guiding column and the second receiving light guiding column, and the fixed light blocking plate is provided with light holes, the spacing of the light holes is the minimum spacing of the grating structure, and the light holes are located at the center of the emitting light guiding column.

[0013] A grating key with a moving vector, wherein the light path of the grating key adopts a counter-radiation type, and includes a light emitting unit and a light receiving unit which are arranged oppositely; wherein the light receiving unit includes a first light receiving unit and a second light receiving unit; the moving handle of the grating key is provided with a grating structure, and the grating structure moves up and down in the gap between the light emitting unit and the light receiving unit along with the moving handle.

[0014] The displacement accuracy of the grating key depends on the grating pitch of the grating structure. The smaller the grating pitch, the higher the displacement accuracy of the grating key. The minimum displacement accuracy of the moving handle is half of the grating pitch. The grating structure can be made of a variety of materials, such as plastic or metal. The grating pitch can be molded or laser engraved according to the accuracy.

[0015] The light emitting unit and the light receiving unit are directly inserted into the PCB to form a counter-reflection, or the patch is located on the PCB to form a counter-reflection.

[0016] When the light emitting unit and the light receiving unit are directly inserted into the PCB to form a cross-reflection, the grating key is split or integrated: the split type is to fix the light emitting unit and the light receiving unit on the PCB with solder first, and then put the switch cavity on; the integrated type is to fix the light emitting unit and the light receiving unit in the switch cavity first, and then fix the whole on the PCB;

[0017] When the light emitting unit and the light receiving unit patches are located on the PCB to form a reflection, the grating key can only be a split type.

[0018] A grating key with a moving vector, wherein the light path of the grating key adopts a refraction type, and comprises a light emitting device and a light receiving device; wherein the light emitting device comprises a light emitting unit and a first optical fiber; the light receiving device comprises a first light receiving unit and a second light receiving unit, a second optical fiber and a third optical fiber; one end of the first optical fiber faces the light emitting unit, and the other end is arranged opposite to one end of the second optical fiber and the third optical fiber at the same time, and a gap is formed by the relative arrangement; the other ends of the second optical fiber and the third optical fiber face the first light receiving unit and the second light receiving unit respectively; the moving handle of the grating key is provided with a grating structure, and the grating structure moves up and down in the gap along with the moving handle.

[0019] The displacement accuracy of the grating key depends on the grating pitch of the grating structure. The smaller the grating pitch, the higher the displacement accuracy of the grating key. The minimum displacement accuracy of the moving handle is half of the grating pitch. The grating structure can be made of a variety of materials, such as plastic or metal. The grating pitch can be molded or laser engraved according to the accuracy.

[0020] Another object of the present invention is achieved by the following technical solutions:

[0021] A grating keyboard comprises a plurality of grating keys with movement vectors.

[0022] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0023] The present invention adopts the mature grating principle and photoelectric effect. When light is irradiated on the photoelectric converter, the displacement of the moving handle is converted into a pulse digital quantity. Therefore, the key displacement can be measured based on the pulse digital quantity. Within the effective displacement, the on-stroke and off-stroke of the key can be customized. This method of using grating to measure displacement has high accuracy and fast response speed. It fundamentally solves all the drawbacks of the existing magnetic axis adjustable stroke keys and optical adjustable stroke keys that use AD conversion analog voltage to measure key displacement. It is not affected by temperature, light intensity, and magnetic field intensity, and can also eliminate assembly errors. It has natural reliability and consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 An exploded view of a raster button with movement vectors.

[0025] Figure 2 It is a structural schematic diagram of a grating key with a moving vector in a semi-integrated state.

[0026] Figure 3 The figure is a schematic diagram of the local structure of a grating key with a moving vector.

[0027] Figure 4 It is a light path diagram of a grating key with a moving vector.

[0028] Figure 5 The figure is a partial structural diagram of a grating key with a moving vector (with a fixed light shield).

[0029] Figure 6 The diagram is a partial structural diagram of a grating key with a moving vector (emitting light guide column with two purposes).

[0030] Figure 7 It is a light path diagram of a grating key with a moving vector (emitting a light guide column with two purposes).

[0031] Figure 8 It is a schematic diagram of the partial structure of a grating key with a moving vector (the light path of the grating key adopts the direct insertion and opposite beam type).

[0032] Fig. 9 The figure is a partial structural diagram of a grating key with a moving vector (emitting light guide column with fixed light blocking plate).

[0033] Fig.10 It is a schematic diagram of the local structure of a grating key with a moving vector (the light path of the grating key adopts the patch-to-patch type).

[0034] The meanings of the accompanying drawings are as follows:

[0035] 1-transmitting light guide column, 2-light emitting unit, 3-first receiving light guide column, 4-second receiving light guide column,

[0036] 5-first light receiving unit, 6-second light receiving unit, 7-movable handle, 8-grating structure, 9-fixed light blocking plate, 10-light hole. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.

[0038] Example 1

[0039] like Figures 1 to 4 A grating key with a moving vector, wherein the light path of the grating key adopts a refraction type, and includes an emitting light guide column 1 and a receiving light guide column that are relatively arranged; wherein a light emitting unit 2 is arranged below the emitting light guide column 1, and the receiving light guide column includes a first receiving light guide column 3 and a second receiving light guide column 4, and a first light receiving unit 5 and a second light receiving unit 6 are respectively arranged below the first receiving light guide column 3 and the second receiving light guide column 4; at the same time, a moving handle 7 of the grating key is provided with a grating structure 8, and the grating structure 8 moves up and down in the gap between the emitting light guide column 1 and the receiving light guide column along with the moving handle 7.

[0040] The top light-receiving end surface of the first receiving light-guiding column 3 is located directly above the top light-receiving end surface of the second receiving light-guiding column 4 .

[0041] The displacement accuracy of the grating key depends on the grating pitch of the grating structure 8. The smaller the grating pitch, the higher the displacement accuracy of the grating key. The minimum displacement accuracy of the moving handle 7 is half of the grating pitch. The grating structure 8 can be made of a variety of materials, such as plastic or metal. The size of the grating pitch can be molded or laser engraved according to the accuracy.

[0042] The grating structure is an equidistant structure, and the height of a single light-transmitting portion is the same as that of a single light-shielding portion. The grating pitch is the height of a single light-transmitting portion or the height of a single light-shielding portion in the grating structure.

[0043] The light emitting unit 2, the first light receiving unit 5, and the second light receiving unit 6 are all located in the key dustproof cavity, and the dustproof cavity has the function of preventing external light from entering the dustproof cavity.

[0044] The working principle of the grating key in this embodiment is as follows:

[0045] As the grating structure 8 moves from top to bottom with the moving handle 7, it goes through the following four stages:

[0046] The light reflected by the transmitting light guide column 1 of the light transmitting unit 2 is blocked by the grating structure, and the first receiving light guide column 3 and the second receiving light guide column 4 cannot receive the light: the first light receiving unit 5 and the second light receiving unit 6 are defined to output a low level, which is set to 00;

[0047] The light reflected by the transmitting light guide column 1 of the light transmitting unit 2 is partially blocked by the grating structure (the upper half is transmitted and the lower half is blocked), the first receiving light guide column 3 receives the light, and the second receiving light guide column 4 does not receive the light: define the first light receiving unit 5 to output a high level and the second light receiving unit 6 to output a low level, which are set to 10;

[0048] All the light reflected by the transmitting light guide column 1 of the light transmitting unit 2 passes through the grating structure, and the first receiving light guide column 3 and the second receiving light guide column 4 receive the light: the first light receiving unit 5 and the second light receiving unit 6 are defined to output a high level, which is set to 11;

[0049] The light reflected by the emitting light guide column 1 from the light emitting unit 2 is partially blocked by the grating structure (the upper half is blocked and the lower half is transmitted), the first receiving light guide column 3 does not receive the light, and the second receiving light guide column 4 receives the light: the first light receiving unit 5 is defined to output a low level and the second light receiving unit 6 is defined to output a high level, which are set to 01.

[0050] It can be seen that moving the button handle 7 to press down several gratings will continuously form the cyclic states of 00, 10, 11, 01, 00, from 00 to 10, from 10 to 11, from 11 to 01, and from 01 to 00. There are a total of 4 state changes, and the key stroke for each state change corresponds to half the grating spacing.

[0051] Then, the handle 7 is moved upward along with the spring to reset several gratings, and the cycle states of 00, 01, 11, 10, 00 will be formed continuously, from 00 to 01, from 01 to 11, from 11 to 10, from 10 to 00, there are a total of 4 state changes, and the key stroke of each state change corresponds to half the grating spacing.

[0052] The displacement of the moving handle 7 is converted into a pulse digital quantity, and then the key displacement can be measured according to the pulse digital quantity. Within the effective displacement, the on-stroke and off-stroke of the key can be customized.

[0053] The above 0 and 1 are both relative high and low level signals, which can be completely opposite depending on different circuits. The present invention is not limited by the above different circuit designs.

[0054] Example 2

[0055] Compared with Example 1, there are the following differences, and the rest is the same as Example 1:

[0056] like Figure 5 In order to obtain a precise light-transmitting light source and shield interference from other light, the first receiving light guide column 3 and the second receiving light guide column 4 are provided with a fixed light blocking plate 9 in the area opposite to the emitting light guide column 1. The fixed light blocking plate 9 is provided with a light-through hole 10. The spacing of the light-through holes 10 is the minimum spacing of the grating structure 8, and the light-through hole 10 is located at the center of the junction of the first receiving light guide column 3 and the second receiving light guide column 4.

[0057] In addition, if Fig. 9 The fixed light blocking plate can also be set on the side of the emitting light guiding column: the fixed light blocking plate is set in the area opposite to the emitting light guiding column and the first receiving light guiding column and the second receiving light guiding column, and the fixed light blocking plate is provided with light holes, the spacing of the light holes is the minimum spacing of the grating structure, and the light holes are located at the center of the emitting light guiding column.

[0058] The fixed light baffle and the grating button lower cover are integrally formed and can also be independently arranged and assembled.

[0059] Example 3

[0060] Compared with Example 1, there are the following differences, and the rest is the same as Example 1:

[0061] like Figure 6 , 7, the transmitting light guide column 1 continues to extend upward in the area opposite to the receiving light guide column, and part of the light emitted by the light emitting unit 2 is transmitted to the keycap of the grating key through the transmitting light guide column 1 extending upward, and the other part is reflected to the receiving light guide column. At this time, the transmitting light guide column 1 has two uses, which can provide light energy for the receiving light guide column and can also be used for lighting indication of the keycap of the grating key.

[0062] Example 4

[0063] The grating key is a split grating key, and the light emitting unit, the first light receiving unit, and the second light receiving unit are all surface mount electronic components, and are all located on the PCB, and closely cooperate with the key body of the grating key to complete the photoelectric conversion.

[0064] Example 5

[0065] like Figure 8 A grating key with a moving vector, wherein the light path of the grating key adopts a counter-radiation type, and includes a light emitting unit and a light receiving unit arranged oppositely; wherein the light receiving unit includes a first light receiving unit and a second light receiving unit; the moving handle of the grating key is provided with a grating structure, and the grating structure moves up and down in the gap between the light emitting unit and the light receiving unit along with the moving handle.

[0066] The first light receiving unit 5 is located directly above the second light receiving unit 6 .

[0067] The displacement accuracy of the grating key depends on the grating pitch of the grating structure. The smaller the grating pitch, the higher the displacement accuracy of the grating key. The minimum movement of the moving handle depends on the size of the grating pitch (that is, the minimum movement of the moving handle is equal to the size of the grating pitch). The grating structure can be made of a variety of materials, such as plastic or metal, and the grating pitch can be molded or laser engraved according to the accuracy.

[0068] The light emitting unit and the light receiving unit are directly inserted on the PCB to form opposite reflection.

[0069] The grating button is split or integrated: the split type is to fix the light emitting unit and the light receiving unit on the PCB by soldering first, and then put the switch cavity on it; the integrated type is to fix the light emitting unit and the light receiving unit in the switch cavity first, and then fix the whole on the PCB.

[0070] Example 6

[0071] like Fig.10A grating key with a moving vector, wherein the light path of the grating key adopts a counter-radiation type, and includes a light emitting unit and a light receiving unit arranged oppositely; wherein the light receiving unit includes a first light receiving unit and a second light receiving unit; the moving handle of the grating key is provided with a grating structure, and the grating structure moves up and down in the gap between the light emitting unit and the light receiving unit along with the moving handle.

[0072] The first light receiving unit 5 is located directly above the second light receiving unit 6 .

[0073] The light emitting unit and light receiving unit patches are located on the PCB to form a counter-reflection, and the grating button can only be a split type.

[0074] Example 7

[0075] A grating key with a moving vector, wherein the optical path of the grating key adopts a refraction type, and comprises a light emitting device and a light receiving device; wherein the light emitting device comprises a light emitting unit and a first optical fiber; the light receiving device comprises a first light receiving unit and a second light receiving unit, a second optical fiber and a third optical fiber; one end of the first optical fiber faces the light emitting unit, and the other end is arranged opposite to one end of the second optical fiber and the third optical fiber at the same time, and a gap is formed by the relative arrangement; the other ends of the second optical fiber and the third optical fiber face the first light receiving unit and the second light receiving unit respectively; the moving handle of the grating key is provided with a grating structure, and the grating structure moves up and down in the gap with the moving handle. The light receiving end face at the top of the second optical fiber is located directly above the light receiving end face at the top of the third optical fiber.

[0076] The displacement accuracy of the grating key depends on the grating pitch of the grating structure. The smaller the grating pitch, the higher the displacement accuracy of the grating key. The minimum movement of the moving handle depends on the size of the grating pitch (that is, the minimum movement of the moving handle is equal to the size of the grating pitch). The grating structure can be made of a variety of materials, such as plastic or metal, and the grating pitch can be molded or laser engraved according to the accuracy.

[0077] In the above embodiments, the grating structures are all equidistant structures, and a single light-transmitting portion in the grating structure is rectangular; however, the grating structure is not limited thereto, and the grating structure may be a non-equidistant structure, and a single light-transmitting portion in the grating structure may be circular.

[0078] In embodiments 1 to 7, the light emitting unit is a visible light emitting tube or an invisible light emitting tube, and the light receiving unit is a photosensitive receiving tube.

[0079] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A grating key with a moving vector, wherein the light path of the grating key is refractive, characterized in that: It includes an emitting light-guiding column and a receiving light-guiding column which are arranged opposite to each other; wherein, a light-emitting unit is arranged below the emitting light-guiding column, and the receiving light-guiding column includes a first receiving light-guiding column and a second receiving light-guiding column, and a first light-receiving unit and a second light-receiving unit are arranged below the first receiving light-guiding column and the second receiving light-guiding column respectively; at the same time, a moving handle of the grating key is provided with a grating structure, and the grating structure moves up and down in the gap between the emitting light-guiding column and the receiving light-guiding column along with the moving handle.

2. The raster key with a moving vector according to claim 1, characterized in that: The displacement accuracy of the grating key depends on the grating pitch of the grating structure. The smaller the grating pitch, the higher the displacement accuracy of the grating key. The minimum displacement accuracy of the moving handle is half of the grating pitch.

3. The raster key with a moving vector according to claim 1, characterized in that: The grating key is a split grating key, and the light emitting unit, the first light receiving unit, and the second light receiving unit are all surface mount electronic components, and are all located on the PCB, and closely cooperate with the key body of the grating key to complete the photoelectric conversion.

4. The raster key with a moving vector according to claim 1, characterized in that: The light emitting unit, the first light receiving unit and the second light receiving unit are all located in the key dustproof cavity, and the dustproof cavity has the function of preventing external light from entering the dustproof cavity.

5. The raster key with a moving vector according to claim 1, characterized in that: The emitting light guide column continues to extend upward in the area opposite to the receiving light guide column. A part of the light emitted by the light emitting unit is transmitted to the keycap of the grating key through the upwardly extending emitting light guide column, and the other part is reflected to the receiving light guide column.

6. The raster key with a moving vector according to claim 1, characterized in that: The first receiving light guide column and the second receiving light guide column are provided with a fixed light blocking plate in the area opposite to the transmitting light guide column, and the fixed light blocking plate is provided with a light through hole, the spacing of the light through holes is the minimum spacing of the grating structure, and the light through hole is located at the center of the junction of the first receiving light guide column and the second receiving light guide column; Alternatively, a fixed light blocking plate is provided in the area opposite to the emitting light guiding column and the first receiving light guiding column and the second receiving light guiding column, and the fixed light blocking plate is provided with light holes, the spacing of the light holes is the minimum spacing of the grating structure, and the light holes are located at the center of the emitting light guiding column.

7. A grating key with a moving vector, wherein the light path of the grating key is a directed light path, characterized in that: It includes a light emitting unit and a light receiving unit which are arranged opposite to each other; wherein the light receiving unit includes a first light receiving unit and a second light receiving unit; the moving handle of the grating key is provided with a grating structure, and the grating structure moves up and down in the gap between the light emitting unit and the light receiving unit along with the moving handle.

8. The raster key with a moving vector according to claim 7, characterized in that: The displacement accuracy of the grating key depends on the grating pitch of the grating structure. The smaller the grating pitch, the higher the displacement accuracy of the grating key. The minimum displacement accuracy of the moving handle is half of the grating pitch.

9. The raster key with a moving vector according to claim 7, characterized in that: The light emitting unit and the light receiving unit are directly inserted into the PCB to form a counter-reflection, or the patch is located on the PCB to form a counter-reflection.

10. The raster key with a moving vector according to claim 9, characterized in that: When the light emitting unit and the light receiving unit are directly inserted into the PCB to form a cross-reflection, the grating key is split or integrated: the split type is to fix the light emitting unit and the light receiving unit on the PCB with solder first, and then put the switch cavity on; the integrated type is to fix the light emitting unit and the light receiving unit in the switch cavity first, and then fix the whole on the PCB; When the light emitting unit and the light receiving unit patches are located on the PCB to form a reflection, the grating key can only be a split type.

11. A grating key with a moving vector, wherein the light path of the grating key is refractive, characterized in that: It includes a light emitting device and a light receiving device; wherein the light emitting device includes a light emitting unit and a first optical fiber; the light receiving device includes a first light receiving unit and a second light receiving unit, a second optical fiber and a third optical fiber; one end of the first optical fiber faces the light emitting unit, and the other end is arranged opposite to one end of the second optical fiber and the third optical fiber at the same time, and a gap is formed by the relative arrangement; the other ends of the second optical fiber and the third optical fiber face the first light receiving unit and the second light receiving unit respectively; the moving handle of the grating key is provided with a grating structure, and the grating structure moves up and down in the gap with the moving handle.

12. The raster key with a moving vector according to claim 11, characterized in that: The displacement accuracy of the grating key depends on the grating pitch of the grating structure. The smaller the grating pitch, the higher the displacement accuracy of the grating key. The minimum displacement accuracy of the moving handle is half of the grating pitch.

13. A grating keyboard, characterized in that: It comprises a raster key with a moving vector as described in any one of claims 1 to 12.

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