Grating key with motion vector and grating keyboard

Abstract

The utility model 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 utility model relates to the field of adjustable stroke keyboard, especially relates to a grating key and grating keyboard with moving vector. BACKGROUND

[0002] The existing adjustable stroke keyboard, whether adopting the magnetic shaft adjustable stroke key or the optical adjustable stroke key, cannot do without AD conversion, and the magnetic shaft adjustable stroke key is influenced by the magnetic field intensity of magnet, the sensitivity of Hall, and the temperature influence on magnet, and the consistency is not good, and the consistency of the existing optical adjustable stroke key is also restricted by the sensitivity of photosensitive element, the intensity of emitted light, and the influence of assembly error. SUMMARY

[0003] The utility model discloses a grating key with moving vector, which overcomes the defects and deficiencies of the prior art.

[0004] Another object of the utility model is to provide a grating keyboard.

[0005] The object of the utility model is achieved by the following technical solutions:

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

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

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

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

[0010] The emitting light guide column continues to extend upward in the area opposite to the receiving light guide column, and the light emitted by the light emitting unit is partially transmitted to the key cap of the optical grating key through the upward extending emitting light guide column, and the other part is reflected to the receiving light guide column. At this time, the emitting light guide column has dual functions, which can provide light energy for the receiving light guide column and also illuminate the key cap of the optical 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 emitting light guide column, and the fixed light blocking plate is provided with a light transmission hole, the interval of the light transmission hole is the minimum interval of the optical grating structure, and the light transmission hole is located at the center position of the joint of the first receiving light guide column and the second receiving light guide column.

[0012] Alternatively, the emitting light guide column is provided with a fixed light blocking plate in the area opposite to the first receiving light guide column and the second receiving light guide column, and the fixed light blocking plate is provided with a light transmission hole, the interval of the light transmission hole is the minimum interval of the optical grating structure, and the light transmission hole is located at the center position of the emitting light guide column.

[0013] An optical grating key with a moving vector, the light path of the optical grating key adopts a reflection type, comprising oppositely arranged light emitting units and light receiving units; wherein the light receiving unit comprises a first light receiving unit and a second light receiving unit; the moving handle of the optical grating key is provided with an optical grating structure, and the optical grating structure moves up and down in the gap between the light emitting unit and the light receiving unit.

[0014] The displacement accuracy of the optical grating key depends on the grating interval of the optical grating structure, the smaller the grating interval, the higher the displacement accuracy of the optical grating key, and the minimum moving amount of the moving handle is half of the grating interval. The optical grating structure can be made of various materials, such as plastic or metal, and the grating interval 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 reflection, or the patch is located on the PCB to form a reflection.

[0016] When the light emitting unit and the light receiving unit are directly inserted into the PCB to form a reflection, the optical grating key can be split type or integrated type: the split type is to fix the light emitting unit and the light receiving unit on the PCB through soldering first, and then put on the switch cavity; 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 patch are located on the PCB to form a reflection, the optical grating key can only be split type.

[0018] A grating key with a moving vector, the light path of the grating key adopts a refractive type, comprising 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 is opposite to the light emitting unit, and the other end of the first optical fiber is arranged opposite to one end of the second optical fiber and the third optical fiber, and the opposite arrangement forms a gap; the other end of the second optical fiber and the third optical fiber is opposite to 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 is, the higher the displacement accuracy of the grating key is, and the minimum moving amount accuracy of the moving handle is half of the grating pitch. The grating structure can be made of various materials, such as plastic or metal, and the grating pitch can be molded or laser engraved according to the accuracy.

[0020] Another purpose of the utility model is realized through the following technical scheme.

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

[0022] Compared with the prior art, the utility model has the following advantages and beneficial effects.

[0023] The utility model adopts mature grating principle and photoelectric effect, converts the displacement amount of the moving handle into pulse digital amount when light irradiates on the photoelectric converter, so the displacement amount of the key can be measured according to the pulse digital amount, and the on stroke and the off stroke of the key can be self-defined in the effective displacement. The method for measuring the displacement amount by using the grating has high accuracy and fast response speed, fundamentally solves all the disadvantages of the existing magnetic shaft adjustable stroke key and optical adjustable stroke key for measuring the displacement amount of the key by using AD conversion analog voltage, is not disturbed by temperature, light intensity and magnetic field intensity, can eliminate assembly error, and has natural reliability and consistency. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is an exploded view of a grating key with a moving vector.

[0025] Figure 2 It is a structure schematic view of the grating key with a moving vector in a semi-assembly state.

[0026] Figure 3 It is a partial structure schematic view of the grating key with a moving vector.

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

[0028] Figure 5 The local structure schematic diagram of a grating key with a moving vector (with a fixed light blocking plate).

[0029] Figure 6 The local structure schematic diagram of a grating key with a moving vector (the light guide column is used for light emission and light transmission).

[0030] Figure 7 The light path diagram of a grating key with a moving vector (the light guide column is used for light emission and light transmission).

[0031] Figure 8 The local structure schematic diagram of a grating key with a moving vector (the light path of the grating key adopts a direct insertion pair type).

[0032] Figure 9 The local structure schematic diagram of a grating key with a moving vector (the light guide column is used for light emission and light transmission with a fixed light blocking plate).

[0033] Figure 10 The local structure schematic diagram of a grating key with a moving vector (the light path of the grating key adopts a patch pair type).

[0034] In the drawings, the following meanings are shown:

[0035] 1 - light emission guide column, 2 - light emission 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 - moving handle, 8 - grating structure, 9 - fixed light blocking plate, 10 - light transmission hole. DETAILED DESCRIPTION

[0037] The present application will be further described in conjunction with the embodiments and drawings, but the embodiments of the present application are not limited thereto.

[0038] Embodiment 1

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

[0040] The top light-receiving end face of the first receiving light guide column 3 is located directly above the top light-receiving end face of the second receiving light guide 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 movement accuracy of the moving handle 7 is half of the grating pitch. The grating structure 8 can be made of various materials such as plastic or metal. 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 part is the same as that of a single light-blocking part. The grating pitch is the height of a single light-transmitting part or the height of a single light-blocking part 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 of the embodiment is as follows:

[0045] The grating structure 8 undergoes the following four stages when the moving handle 7 moves from top to bottom:

[0046] The light reflected by the light emitting unit 2 through the emitting light guide column 1 is blocked by the grating structure, and the first receiving light guide column 3 and the second receiving light guide column 4 cannot receive light: define the first light receiving unit 5 and the second light receiving unit 6 as outputting low level, set as 00;

[0047] The light reflected by the light emitting unit 2 through the emitting light guide column 1 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 light, and the second receiving light guide column 4 cannot receive light: define the first light receiving unit 5 as outputting high level and the second light receiving unit 6 as outputting low level, set as 10;

[0048] The light reflected by the light emitting unit 2 through the emitting light guide column 1 is completely transmitted through the grating structure, and the first receiving light guide column 3 and the second receiving light guide column 4 receive light: define the first light receiving unit 5 and the second light receiving unit 6 as outputting high level, set as 11;

[0049] The light reflected by the light emitting unit 2 through the emitting light guide column 1 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 cannot receive light, and the second receiving light guide column 4 receives light: define the first light receiving unit 5 as outputting low level and the second light receiving unit 6 as outputting high level, set as 01.

[0050] Therefore, the mobile handle 7 presses the gratings, and the 00, 10, 11, 01, 00 cycle state is continuously formed, from 00 to 10, from 10 to 11, from 11 to 01, from 01 to 00, and there are 4 state changes in total, and the key stroke corresponding to each state change forms one half of the grating spacing.

[0051] Then, the mobile handle 7 resets the gratings upward with the spring, and the 00, 01, 11, 10, 00 cycle state is continuously formed, from 00 to 01, from 01 to 11, from 11 to 10, from 10 to 00, and there are 4 state changes in total, and the key stroke corresponding to each state change forms one half of the grating spacing.

[0052] The displacement of the mobile handle 7 is converted into a pulse digital quantity, and the key displacement can be calculated according to the pulse digital quantity, and in the effective displacement, the on stroke and the off stroke of the key can be defined.

[0053] The above 0 and 1 are relative high and low level signals, and can be opposite according to different circuits, and the utility model is not limited by the above different circuit designs.

[0054] Embodiment 2

[0055] Compared with embodiment 1, the following differences exist, and the rest is the same as embodiment 1:

[0056] As Figure 5 , in order to obtain accurate light source and shield other light interference, the first receiving light guide column 3 and the second receiving light guide column 4 are provided with a fixed light shielding plate 9 in the area opposite to the emitting light guide column 1, the fixed light shielding plate 9 is provided with a light transmission hole 10, the interval of the light transmission hole 10 is the minimum interval of the grating structure 8, and the light transmission hole 10 is located at the center position of the joint of the first receiving light guide column 3 and the second receiving light guide column 4.

[0057] In addition, as Figure 9 , the fixed light shielding plate can also be arranged on the side of the emitting light guide column: the area opposite to the first receiving light guide column and the second receiving light guide column of the emitting light guide column is provided with a fixed light shielding plate, the fixed light shielding plate is provided with a light transmission hole, the interval of the light transmission hole is the minimum interval of the grating structure, and the light transmission hole is located at the center position of the emitting light guide column.

[0058] The fixed light shielding plate and the grating key lower cover are integrally formed, and can also be independently arranged and assembled.

[0059] Embodiment 3

[0060] Compared with embodiment 1, the following differences exist, and the rest is the same as embodiment 1:

[0061] As Figure 6 , 7The emitting light column 1 continues to extend upward in the area opposite to the receiving light column, and the light emitted by the light emitting unit 2 is partly transmitted to the key cap of the optical grating key through the upward extending emitting light column 1, and partly reflected to the receiving light column. At this time, the emitting light column 1 is dual-purpose, which can provide light energy for the receiving light column and illuminate the key cap of the optical grating key.

[0062] Embodiment 4

[0063] The optical grating key is a split type optical grating key, the light emitting unit, the first light receiving unit and the second light receiving unit are all patch electronic components, and are all located on the PCB to complete photoelectric conversion in cooperation with the key body of the optical grating key.

[0064] Embodiment 5

[0065] As Figure 8 An optical grating key with a moving vector, the light path of the optical grating key adopts a reflection type, comprising oppositely arranged light emitting units and light receiving units; wherein the light receiving unit comprises a first light receiving unit and a second light receiving unit; the moving handle of the optical grating key is provided with an optical grating structure, and the optical 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 precision of the optical grating key depends on the grating pitch of the optical grating structure, the smaller the grating pitch, the higher the displacement precision of the optical grating key, and the minimum movement of the moving handle depends on the size of the grating pitch (i.e. the minimum movement of the moving handle is equal to the size of the grating pitch). The optical grating structure can be made of various materials, such as plastic or metal, and the grating pitch size can be molded or laser engraved according to the precision.

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

[0069] The optical grating key is split type or integral type: the split type is to solder the light emitting unit and the light receiving unit on the PCB first, and then put on the switch cavity; the integral 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] Embodiment 6

[0071] As Figure 10A grating button with a movement vector, the light path of the grating button adopts a reflection type, comprising oppositely arranged light emitting units and light receiving units; wherein the light receiving units comprise first light receiving units and second light receiving units; the moving handle of the grating button is provided with a grating structure, and the grating structure moves up and down in the gap between the light emitting units and the light receiving units.

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

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

[0074] Embodiment 7

[0075] A grating button with a movement vector, the light path of the grating button adopts a reflection type, comprising oppositely arranged light emitting units and light receiving units; wherein the light receiving units comprise first light receiving units and second light receiving units; the moving handle of the grating button is provided with a grating structure, and the grating structure moves up and down in the gap between the light emitting units and the light receiving units.

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

[0077] In the above embodiments, the grating structure is an equal-pitch structure, and the single light-transmitting part in the grating structure is rectangular; however, the grating structure is not limited thereto, and the grating structure can be a non-equal-pitch structure, and the single light-transmitting part in the grating structure can 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 the preferred embodiments of the present application, but the embodiments of the present application are not limited by the above embodiments, and any changes, modifications, substitutions, combinations and simplifications made without departing from the spirit and principles of the present application shall be equivalent replacement methods, and all shall be included in the protection scope of the present application.

Claims

1. A grating key having a movement vector, the light path of the grating key being of a refractive type, characterized in that, The light emitting guide column and the light receiving guide column are oppositely arranged; the light emitting unit is arranged below the light emitting guide column; the light receiving guide column comprises a first light receiving guide column and a second light receiving guide column; the first light receiving unit and the second light receiving unit are arranged below the first light receiving guide column and the second light receiving guide column respectively; the grating structure is arranged on the moving handle of the grating key; the grating structure moves up and down in the gap between the light emitting guide column and the light receiving guide column; the minimum moving amount of the moving handle has a precision of half of the grating interval; and the top light receiving end surface of the first light receiving guide column is located directly above the top light receiving end surface of the second light receiving guide column.

2. The grating key with a movement vector according to claim 1, characterized in that The grating key is a split grating key; the light emitting unit, the first light receiving unit and the second light receiving unit are all patch electronic components and are arranged on the PCB to complete photoelectric conversion in cooperation with the key body of the grating key.

3. The grating key with a movement 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 arranged in the dustproof cavity; and the dustproof cavity has a function of preventing external light from entering the dustproof cavity.

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

5. The moving vector grating key of claim 1, wherein, The first light receiving guide column and the second light receiving guide column are provided with a fixed light blocking plate in the area opposite to the light emitting guide column; the fixed light blocking plate is provided with a light transmission hole; the interval of the light transmission hole is the minimum interval of the grating structure; and the light transmission hole is located at the center position of the joint of the first light receiving guide column and the second light receiving guide column. Alternatively, the light emitting guide column is provided with a fixed light blocking plate in the area opposite to the first light receiving guide column and the second light receiving guide column; the fixed light blocking plate is provided with a light transmission hole; the interval of the light transmission hole is the minimum interval of the grating structure; and the light transmission hole is located at the center position of the light emitting guide column.

6. A grating key having a movement vector, the light path of the grating key adopting a reflection type, characterized by, The light emitting unit and the light receiving unit are oppositely arranged; the light receiving unit comprises a first light receiving unit and a second light receiving unit; the grating structure is arranged on the moving handle of the grating key; the grating structure moves up and down in the gap between the light emitting unit and the light receiving unit; the minimum moving amount of the moving handle has a precision of half of the grating interval; and the first light receiving unit is located directly above the second light receiving unit.

7. The grating key with a movement vector according to claim 6, characterized in that The light emitting unit and the light receiving unit are directly inserted on the PCB to form a pair of shots, or the patch is located on the PCB to form a pair of shots.

8. The grating key with a movement vector according to claim 7, characterized in that, When the light emitting unit and the light receiving unit are directly inserted on the PCB to form a pair of shots, the grating key is split type or integral type: the light emitting unit and the light receiving unit are first fixed on the PCB by soldering, and then the switch cavity is sleeved; the integral type is that the light emitting unit and the light receiving unit are first fixed in the switch cavity, and then the whole is fixed on the PCB. When the patch of the light emitting unit and the light receiving unit is located on the PCB to form a pair of shots, the grating key can only be split type.

9. A grating key having a movement vector, the optical path of the grating key being of the refractive type, characterized in that, The application relates to a light-emitting device, a light-receiving device, and a grating button with a moving vector.

10. A keypad, characterized by The application relates to a light-emitting device, a light-receiving device, and a grating button with a moving vector. The application relates to a light-emitting device, a light-receiving device, and a grating button with a moving vector.

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