Anti-interference keyboard

Abstract

The utility model relates to an anti-interference keyboard and relates to the technical field of keyboards, the anti-interference keyboard comprises a shell and a plurality of keys, each key comprises a key cap and a shaft body, a mounting cavity is formed in the shell, a PCB and a fixing plate are arranged in the mounting cavity, and a plurality of key positioning holes are formed in the fixing plate; the shaft body is installed in the key positioning hole of the fixing plate, the bottom of the shaft body is connected with the PCB, and the top of the shaft body is connected with the key cap; and the PCB comprises a filter circuit module. The keyboard has the effect of improving the durability and reliability of the keyboard.

Description

Technical Field

[0001] This application relates to the technical field of keyboards, and in particular, to an anti-interference keyboard. Background Art

[0002] A keyboard is an instruction and data input device used to operate a computer device. A mechanical keyboard is one type of keyboard. Structurally, each key of a mechanical keyboard has a separate microswitch to control the closure, and this microswitch is also called an axis. Since each key is composed of an independent microswitch, the key has a strong sense of paragraph, resulting in a special feel. Therefore, mechanical keyboards are more popular among users with special requirements for feel.

[0003] Generally, the structure of a mechanical keyboard includes keycaps, axes, a fixing plate, a PCB board, and a bottom cover. The keycaps are installed on the axes, the axes are installed on the fixing plate, the bottom of the axes is connected to the PCB board, and the fixing plate is fixedly connected to the bottom cover. During the use of the mechanical keyboard, when the user presses the keycap, the keycap presses the axis to trigger the PCB board, and the input of instructions and data can be realized. However, since more or less certain clutter will be generated during the transmission of the input signal, when the clutter accumulates to a certain extent, it will exceed the accuracy range of the main control IC, which is likely to cause the keys to malfunction and have a certain impact on the durability and reliability of the keyboard. Summary of the Utility Model

[0004] The purpose of this application is to provide an anti-interference keyboard that can improve the durability and reliability of the keyboard.

[0005] In the first aspect, an anti-interference keyboard provided by this application adopts the following technical solution:

[0006] An anti-interference keyboard includes a housing and a plurality of keys. The keys include keycaps and axes. An installation cavity is formed inside the housing. A PCB board and a fixing plate are provided in the installation cavity. A plurality of key positioning holes are provided on the fixing plate;

[0007] The axes are installed in the key positioning holes of the fixing plate. The bottom of the axes is connected to the PCB board, and the top of the axes is connected to the keycaps;

[0008] The PCB board includes a filter circuit module.

[0009] By adopting the above technical solution, this application sets a filter circuit module to perform anti-interference processing on the clutter generated during the use of the keyboard, improves the anti-interference ability of the keyboard PCB board, and thus improves the durability and reliability of the keyboard.

[0010] Further, the filter circuit module includes a plurality of filter circuits. Each filter circuit includes a Hall sensor. The first pin of the Hall sensor is connected to the signal input terminal and the power supply terminal of the filter circuit module. The second pin of the Hall sensor is connected to the signal output terminal of the filter circuit module. The third pin of the Hall sensor is grounded.

[0011] By adopting the above technical solution, the filter circuit of the present application achieves an anti-interference effect through a Hall sensor. The Hall sensor can reduce noise interference by converting the signal into a digital signal, thereby effectively improving the anti-interference ability.

[0012] Further, the filter circuit further includes a field effect transistor. The gate and the source of the field effect transistor are connected to the signal input terminal and the power supply terminal of the filter circuit module. The drain of the field effect transistor is connected to the first pin of the Hall sensor.

[0013] By adopting the above technical solution, the field effect transistor of the present application can amplify the input signal, thereby enhancing the filtering effect of the filter circuit and further improving the anti-interference ability.

[0014] Further, the filter circuit further includes a first resistor, a second resistor, and a third resistor. The first resistor is disposed between the signal input terminal of the filter circuit module and the gate of the field effect transistor. The second resistor is disposed between the first resistor and the power supply terminal of the filter circuit module. The third resistor is disposed between the drain of the field effect transistor and the first pin of the Hall sensor.

[0015] By adopting the above technical solution, the present application connects the filter circuit through the first resistor, the second resistor, and the third resistor, which can improve the stability and reliability of the filter circuit.

[0016] Further, the shaft body includes a top cover and a base. The side surface of the base is snap-connected to the fixing plate. The bottom surface of the base is connected to the PCB board. An accommodation cavity is formed inside the top cover and the base.

[0017] By adopting the above technical solution, the key shaft body of the present application is snap-connected to the fixing plate through the base, which is convenient for installation and disassembly. At the same time, the base is connected to the PCB board, which is convenient for triggering the PCB board by pressing the shaft body, thereby realizing the input of instructions and data of the keyboard.

[0018] Further, a shaft core that slides up and down along the accommodation cavity is provided in the middle of the top cover. A spring is sleeved outside one end of the shaft core. The other end of the shaft core extends out of the top cover and is snap-connected to the keycap;

[0019] The bottom of the spring is snap-connected to the base.

[0020] By adopting the above technical solution, the present application enables the key to automatically return to its original position after being pressed through an axel core that can slide up and down to press the spring, ensuring the practicality of the keyboard.

[0021] Further, the bottom of the axel core is a hollow structure, and a magnetic core is arranged inside the hollow structure.

[0022] By adopting the above technical solution, the present application realizes magnetic field induction and Hall effect inside the axel body by setting a magnetic core. After the keycap is pressed, the axel core slides downward under the pressing force, causing the magnetic core inside the axel core to slide downward and approach the Hall sensor arranged on the PCB board. An electrical signal is generated through non-contact between the magnetic core and the Hall sensor by the Hall effect. After the external force is withdrawn, the spring resets the axel core, causing the magnetic core inside the axel core to move upward and away from the Hall sensor arranged on the PCB board, and the Hall effect disappears. The present application triggers the PCB board through magnetic field induction and Hall effect, which can further improve the durability and reliability of the keyboard.

[0023] Further, the PCB board is connected with a power supply interface, and the power supply interface is connected to the power supply end of the filter circuit module.

[0024] By adopting the above technical solution, the present application can access an external power supply through the power supply interface to charge the keyboard or directly supply power through the external power supply, improving the practicality of the keyboard.

[0025] Further, a lanyard connection part is arranged on the outer side of the housing, and the lanyard connection part is connected with a lanyard structure.

[0026] By adopting the above technical solution, the present application is provided with a lanyard connection part on the housing to connect the lanyard structure, which is convenient for taking the keyboard through the lanyard structure when going out, improving the practicality of the keyboard.

[0027] Further, the lanyard structure includes a connecting rope part and a lanyard part. One end of the connecting rope part passes through the lanyard connection part, and the other end of the connecting rope part is detachably fixed to the lanyard part.

[0028] By adopting the above technical solution, the lanyard structure of the present application is fixed in a detachable manner, which is convenient for installing and removing the lanyard structure according to actual needs, improving the practicality of the keyboard.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. By setting the filter circuit module, the present application performs anti-interference processing on the clutter generated during the use of the keyboard, improving the anti-interference ability of the keyboard PCB board, thereby improving the durability and reliability of the keyboard;

[0031] 2. The filtering circuit of the present application achieves anti-interference effect through a Hall sensor. The Hall sensor can reduce noise interference by converting the signal into a digital signal, thereby effectively improving the anti-interference ability;

[0032] 3. The present application realizes magnetic field induction and Hall effect inside the shaft body by setting a magnetic core. After the keycap is pressed, the shaft core slides downward under the pressing force, causing the magnetic core inside the shaft core to slide downward and approach the Hall sensor provided on the PCB board. An electrical signal is generated through non-contact between the magnetic core and the Hall sensor by the Hall effect. After the external force is removed, the spring resets the shaft core, causing the magnetic core inside the shaft core to move upward and away from the Hall sensor provided on the PCB board, and the Hall effect disappears. Triggering the PCB board through magnetic field induction and Hall effect can further improve the durability and reliability of the keyboard;

[0033] 4. The lanyard structure of the present application is fixed in a detachable manner, which is convenient for installing and removing the lanyard structure according to actual needs, thereby enhancing the practicality of the keyboard. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is the overall structural schematic diagram of the embodiment of the present application;

[0035] Figure 2 is the cross-sectional structural schematic diagram of the embodiment of the present application;

[0036] Figure 3 is the schematic diagram of the principle of the filtering circuit module of the embodiment of the present application;

[0037] Figure 4 is the cross-sectional structural schematic diagram of the shaft body of the embodiment of the present application;

[0038] Figure 5 is the structural schematic diagram of the PCB board of the embodiment of the present application;

[0039] In the figure, 1, housing; 11, lanyard connection part; 2, key; 21, keycap; 22, shaft body; 221, top cover; 222, base; 223, shaft core; 224, spring; 225, magnetic core; 3, lanyard structure; 31, connecting rope part; 32, lanyard part; 33, pressing buckle; 4, PCB board; 41, first filtering circuit; 42, Hall sensor; 43, power supply interface; 5, fixing plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] The following will further describe the present application in detail Figure 1 - attached Figure 5 , with reference to the attached drawings.

[0041] When using a mechanical keyboard, the user presses the keycap 21, so that the keycap 21 presses the shaft 22 to trigger the PCB board 4, and the input of instructions and data can be realized. However, since a certain amount of noise will be generated during the transmission of the input signal, when the noise accumulates to a certain extent, it will exceed the accuracy range of the main control IC, which will easily cause the key 2 to malfunction, and have a certain impact on the durability and reliability of the keyboard. Therefore, the embodiment of the present application provides an anti-interference keyboard, referring to Figure 1 and Figure 2 , including a shell 1 and a plurality of keys 2, a hanging rope connection part 11 is provided on the outer side of the shell 1, and the hanging rope connection part 11 is connected to the hanging rope structure 3. The key 2 includes a key cap 21 and a shaft body 22, and an installation cavity is formed inside the shell 1, and a PCB board 4 and a fixing plate 5 are provided in the installation cavity. A plurality of key 2 positioning holes are opened on the fixing plate 5, and the shaft body 22 is installed in the key 2 positioning holes of the fixing plate 5, and the fixing plate 5 is used to fix the key 2. The bottom of the shaft body 22 is connected to the PCB board 4, and the top of the shaft body 22 is connected to the key cap 21. The PCB board 4 is used to integrate the control circuit of the keyboard, and the PCB board 4 includes a filter circuit module.

[0042] The implementation principle of the embodiment of the present application is: by setting a filter circuit module, anti-interference processing is performed on the noise generated during the use of the keyboard, and the anti-interference ability of the keyboard PCB board 4 is improved, thereby improving the durability and reliability of the keyboard.

[0043] like Figure 1 As shown, the lanyard structure 3 of the embodiment of the present application includes a connecting rope portion 31 and a lanyard portion 32. One end of the connecting rope portion 31 passes through the lanyard connecting portion 11, and the other end of the connecting rope portion 31 is detachably fixed to the lanyard portion 32 by a pressing buckle 33. When installing the lanyard structure 3, it is only necessary to pass the connecting rope portion 31 through the lanyard connecting portion 11, and then align the pressing buckle 33 on the connecting rope portion 31 with the pressing buckle 33 of the lanyard portion 32, and fix the pressing buckle 33 by pressing. When disassembling the lanyard structure 3, it is only necessary to open the pressing buckle 33 to separate the connecting rope portion 31 and the lanyard portion 32, so as to remove the connecting rope portion 31 from the lanyard connecting portion 11. In another embodiment, the connecting rope portion 31 and the lanyard portion 32 can also be detachably fixed by means of Velcro or the like.

[0044] The implementation principle of the embodiment of the present application is: a lanyard structure 3 is installed to facilitate taking the keyboard through the lanyard structure 3 when carrying it outside. At the same time, the lanyard structure 3 is fixed in a detachable manner, which is convenient for installing and removing the lanyard structure 3 according to actual needs, thereby improving the practicality of the keyboard.

[0045] like Figure 3As shown, the filter circuit module of the embodiment of the present application includes several filter circuits, and the core component of the filter circuit is the Hall sensor 42. The Hall sensor 42 can reduce noise interference by converting the signal into a digital signal, thereby effectively improving the anti-interference ability. Since the structure of each filter circuit is the same, the embodiment of the present application takes the first filter circuit 41 as an example, and the first filter circuit 41 includes the first Hall sensor QA1, the first field effect tube Q1, the resistor R1, the resistor R44, the resistor R45 and the capacitor C1. The power supply end of the filter circuit module is connected to the gate of the first field effect tube Q1 and one end of the resistor R44, the first signal input end COL1 of the filter circuit module is connected to one end of the resistor R45, and the other ends of the resistors R44 and R45 are connected to the source of the first field effect tube Q1. The drain of the first field effect tube Q1 is connected to the first pin of the first Hall sensor QA1 through the resistor R1, one end of the capacitor C1 is connected to the first pin of the first Hall sensor QA1, and the other end of the capacitor C1 is grounded. The second pin of the first Hall sensor QA1 is connected to the signal output end of the filter circuit module, and the third pin of the first Hall sensor QA1 is grounded.

[0046] like Figure 2 and 4 As shown, the shaft body 22 of the embodiment of the present application includes a top cover 221 and a base 222, the side of the base 222 is clamped with the fixing plate 5, the bottom surface of the base 222 is connected to the PCB board 4, and the top cover 221 and the base 222 form a receiving cavity inside, and the receiving cavity is used to install the internal structure of the shaft body 22. The middle part of the top cover 221 is provided with a shaft core 223 that slides up and down along the receiving cavity, one end of the shaft core 223 is sleeved with a spring 224, the other end of the shaft core 223 extends out of the top cover 221 and is clamped with the keycap 21, the bottom of the spring 224 is clamped with the base 222, and the shaft core 223 is used to transmit the downward pressing force when pressing the keycap 21 to the spring 224, so that the spring 224 is compressed, and when the pressing force disappears, the spring 224 is reset, so that the key 2 is reset. The bottom of the shaft core 223 of the embodiment of the present application is a hollow structure, and a magnetic core 225 is arranged in the hollow structure.

[0047] In the specific implementation process, the magnetic core 225 corresponds to the position of the Hall sensor 42 provided on the PCB board 4. After the key cap 21 is pressed, the shaft core 223 slides downward under the pressing force, so that the magnetic core 225 inside the shaft core 223 slides downward and approaches the Hall sensor 42 provided on the PCB board 4. The magnetic core 225 and the Hall sensor 42 generate an electrical signal through the air contact through the Hall effect. After the external force is removed, the spring 224 resets the shaft core 223, so that the magnetic core 225 inside the shaft core 223 moves upward and away from the Hall sensor 42 provided on the PCB board 4, and the Hall effect disappears.

[0048] The implementation principle of the embodiments of this application is as follows: Triggering the PCB board 4 through magnetic field induction and Hall effect can further improve the durability and reliability of the keyboard.

[0049] As Figure 5 shown, the Hall sensor 42 is provided at the bottom of the PCB board 4, and its position corresponds to the keys 2 one by one. The PCB board 4 is also connected with a power supply interface 43, and the power supply interface 43 is connected to the power supply end of the filter circuit module. In the specific implementation process, the power supply interface 43 is a type-c interface, and the type-c interface can achieve faster transmission and charging. By connecting to an external power supply through the power supply interface 43, the keyboard can be charged or directly powered by the external power supply, so that the keyboard of the embodiments of this application can achieve wired connection or wireless connections such as Bluetooth and 2.4g.

[0050] In a preferred implementation manner, an anti-slip pad is further provided at the bottom of the housing 1 of the embodiments of this application for anti-slip of the keyboard, making it more convenient to use.

[0051] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. The same components are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. An anti-interference keyboard, characterized in that: The invention comprises a housing (1) and a plurality of keys (2), wherein the keys (2) comprise key caps (21) and shaft bodies (22); a mounting cavity is formed inside the housing (1), a PCB board (4) and a fixing plate (5) are arranged in the mounting cavity, and a plurality of key (2) positioning holes are opened on the fixing plate (5); The shaft body (22) is installed in the key (2) positioning hole of the fixing plate (5), the bottom of the shaft body (22) is connected to the PCB board (4), and the top of the shaft body (22) is connected to the key cap (21); The PCB board (4) comprises a filter circuit module.

2. The anti-interference keyboard according to claim 1, characterized in that: The filter circuit module comprises a plurality of filter circuits, wherein the filter circuit comprises a Hall sensor (42), a first pin of the Hall sensor (42) being connected to a signal input end and a power supply end of the filter circuit module, a second pin of the Hall sensor (42) being connected to a signal output end of the filter circuit module, and a third pin of the Hall sensor (42) being grounded.

3. The anti-interference keyboard according to claim 2, characterized in that: The filter circuit also includes a field effect tube, the gate and source of the field effect tube are connected to the signal input end and the power supply end of the filter circuit module, and the drain of the field effect tube is connected to the first pin of the Hall sensor (42).

4. The anti-interference keyboard according to claim 3, characterized in that: The filter circuit further comprises a first resistor, a second resistor and a third resistor, wherein the first resistor is arranged between a signal input end of the filter circuit module and a gate of the field effect tube, the second resistor is arranged between the first resistor and a power supply end of the filter circuit module, and the third resistor is arranged between a drain of the field effect tube and a first pin of the Hall sensor (42).

5. The anti-interference keyboard according to claim 1, characterized in that: The shaft body (22) comprises a top cover (221) and a base (222); the side surface of the base (222) is snap-connected with the fixing plate (5); the bottom surface of the base (222) is connected with the PCB board (4); and a receiving cavity is formed inside the top cover (221) and the base (222).

6. The anti-interference keyboard according to claim 5, characterized in that: A shaft core (223) is provided in the middle of the top cover (221) and slides up and down along the accommodating cavity, a spring (224) is sleeved on one end of the shaft core (223), and the other end of the shaft core (223) extends out of the top cover (221) and is clamped with the key cap (21); The bottom of the spring (224) is snap-connected with the base (222).

7. The anti-interference keyboard according to claim 6, characterized in that: The bottom of the shaft core (223) is a hollow structure, and a magnetic core (225) is arranged in the hollow structure.

8. An anti-interference keyboard according to any one of claims 1 to 7, characterized in that: The PCB board (4) is connected to a power supply interface (43), and the power supply interface (43) is connected to a power supply end of the filter circuit module.

9. An anti-interference keyboard according to any one of claims 1 to 7, characterized in that: It also includes a hanging rope connection portion (11) arranged on the outer side of the shell (1), and the hanging rope connection portion (11) is connected to the hanging rope structure (3).

10. The anti-interference keyboard according to claim 9, characterized in that: The hanging rope structure (3) comprises a connecting rope portion (31) and a hanging rope portion (32), one end of the connecting rope portion (31) passes through the hanging rope connecting portion (11), and the other end of the connecting rope portion (31) is detachably fixed to the hanging rope portion (32).

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