Key switch capable of switching on / off power signal or magnetic signal

Abstract

The utility model relates to a key switch capable of switching on and switching off electric signals or magnetic signals, and relates to the technical field of key switches, the key switch comprises a base, a top cover, a key shaft and an electric contact assembly, the top cover and the base are clamped and an installation cavity is formed in the top cover and the base, and the key shaft is installed in the installation cavity in a vertically movable mode and extends upwards out of the top of the top cover; the electric contact assembly is mounted in the mounting cavity and downwards extends out of the bottom of the base; a magnetic shaft core is arranged at the bottom of the key shaft, the interior of the base extends upwards to form a first containing cavity, and the magnetic shaft core moves up and down along the first containing cavity. The application has the effects of improving the user experience and effectively saving the cost.

Description

Technical Field

[0001] The present application relates to the technical field of key switches, and in particular to a key switch capable of switching on and off electrical signals or magnetic signals. Background Art

[0002] Key switches are usually used in electronic products such as keyboards that need to be triggered by pressing. Key switches in the prior art are usually divided into electric signal switches and magnetic signal switches according to the on-off method. Among them, the electric signal switch is a contact switch, which usually includes a moving contact and a static contact. The moving contact is pressed to make the static contact contact or separate. When the moving contact is in contact with the static contact, the switch is turned on, and when the moving contact is separated from the static contact, the switch is turned off. The magnetic signal switch is a non-contact switch that uses the principle of electromagnetic induction, usually by inducing magnetic field changes through a Hall sensor to turn the switch on or off.

[0003] In actual use, the advantages of magnetic signal switches are high sensitivity and the ability to sense tiny changes in the magnetic field, thereby achieving more precise control and faster response speeds. However, the disadvantage of magnetic signal switches is that they are easily interfered by external magnetic fields, leading to operational errors, and are prone to failure in harsh environments such as high temperature and high humidity. The advantages of electric signal switches are strong anti-interference, anti-vibration and anti-impact capabilities, but the disadvantage of electric signal switches is that they cannot be used in high voltage environments. Therefore, for different usage environments, users have different needs for electric signal switches and magnetic signal switches. Using only one push button switch cannot simultaneously meet the usage needs of all users in different situations, and using two push button switches for control at the same time has the problem of high cost. Utility Model Content

[0004] The purpose of this application is to provide a key switch that can turn on and off electrical signals or magnetic signals, thereby improving the user experience and effectively saving costs.

[0005] The present application provides a key switch capable of switching on and off electrical signals or magnetic signals, which adopts the following technical solution:

[0006] A key switch capable of switching on and off electrical signals or magnetic signals, comprising a base, a top cover, a key shaft and an electrical contact assembly, wherein the top cover and the base are snap-fitted to form an installation cavity inside, the key shaft is installed in the installation cavity so as to be movable up and down and extends upward from the top of the top cover, and the electrical contact assembly is installed in the installation cavity and extends downward from the bottom of the base;

[0007] A magnetic shaft core is provided at the bottom of the button shaft, and the interior of the base extends upward to form a first accommodating cavity, and the magnetic shaft core moves up and down along the first accommodating cavity.

[0008] By adopting the above-mentioned technical solution, the present application integrates the electrical signal switch and the magnetic signal switch into one push button switch, wherein the magnetic shaft core realizes the magnetic signal on and off, and the electrical contact component realizes the electrical signal on and off. The push button switch can be switched to be on and off by electrical signal or magnetic signal according to actual needs, which can meet the usage needs of different users in different scenarios, improve the user experience, and effectively save costs.

[0009] Further, the bottom of the key shaft extends downward to form a second accommodating cavity, the second accommodating cavity is nested in the first accommodating cavity, the magnetic shaft core is installed in the second accommodating cavity, and the second accommodating cavity is used to drive the magnetic shaft core to move up and down along the first accommodating cavity when the key shaft moves up and down;

[0010] Springs are sleeved outside the first accommodating chamber and the second accommodating chamber.

[0011] By adopting the above technical solution, the present application drives the magnetic axis core to move up and down along the first accommodating cavity through the second accommodating cavity, and by setting a spring, the button axis can be restored by the elastic force of the spring after being pressed, thereby ensuring the reliability of the magnetic signal on and off.

[0012] Furthermore, the bottom of the second accommodating cavity protrudes inward to form an undercut portion, and the undercut portion is used to fix the magnetic shaft core in the second accommodating cavity.

[0013] By adopting the above technical solution, the present application further fixes the magnetic shaft core installed in the second accommodating cavity by providing an undercut portion, thereby ensuring the stability of the magnetic shaft core when it moves up and down.

[0014] Further, the electrical contact assembly includes a fixed terminal and a movable terminal, and the fixed terminal and the movable terminal are fixed on the base;

[0015] A fixed contact portion is provided on one side of the fixed terminal close to the movable terminal, and a movable contact portion is provided on one side of the movable terminal close to the fixed terminal.

[0016] By adopting the above technical solution, the present application realizes the conduction of electrical signals by the contact between the fixed contact part and the movable contact part of the fixed terminal and the movable terminal, and realizes the disconnection of electrical signals by the separation of the fixed contact part and the movable contact part of the fixed terminal and the movable terminal, thereby ensuring the reliability of the on-off of electrical signals.

[0017] Furthermore, the fixed contact portion is a vertical semi-cylindrical surface, and the movable contact portion is a horizontal semi-cylindrical surface.

[0018] By adopting the above technical solution, in the present application, the fixed contact part and the movable contact part are set as two mutually perpendicular semi-cylindrical surfaces, ensuring that the contact between the fixed contact part and the movable contact part is a point. Under the same force, the pressure is greater, making it easier for the fixed contact part and the movable contact part to come into contact, reducing the occurrence of poor contact caused by metal aging, and improving the service life of the electrical contact component.

[0019] Further, an elastic sheet is provided at the top of the movable terminal, and the movable contact part is located on the side of the elastic sheet close to the fixed terminal;

[0020] The elastic sheet is used to separate the movable contact part from the fixed contact part when being pressed, and to bring the movable contact part into contact with the fixed contact part when restoring.

[0021] By adopting the above technical solution, in the present application, the elastic sheet is pressed and restored to control the separation or contact between the movable contact part and the fixed contact part, ensuring the reliability of the on-off of the electrical signal.

[0022] Further, a first abutting part protruding towards the key shaft is provided at the position where the elastic sheet is close to the key shaft;

[0023] The first abutting part is used to abut against the key shaft and press the elastic sheet when the key shaft is stationary, and to separate from the key shaft and make the elastic sheet move towards the direction close to the fixed terminal after the key shaft moves downward by a certain distance.

[0024] By adopting the above technical solution, in the present application, the elastic sheet is pressed by the protruding first abutting part abutting against the key shaft. After the key shaft moves downward, the first abutting part separates from the key shaft, and the elastic sheet moves towards the direction close to the fixed terminal due to the elastic force, so that the movable contact part comes into contact with the fixed contact part, ensuring the reliability of the on-off of the electrical signal.

[0025] Further, a second abutting part protruding towards the movable terminal is provided at the abutting position between the key shaft and the movable terminal, and a concave part is provided at the top of the second abutting part.

[0026] By adopting the above technical solution, in the present application, the elastic sheet is pressed by the second abutting part abutting against the first abutting part. Since a concave part is provided at the top of the second abutting part, after the key shaft moves downward by a certain distance, the first abutting part separates from the second abutting part, and the concave part enables the first abutting part to have a larger movement space, which is conducive to the restoration of the elastic sheet, so that the movable contact part comes into contact with the fixed contact part, ensuring the reliability of the on-off of the electrical signal.

[0027] Further, the second abutting part is a semi-cylindrical surface inclined away from the movable terminal.

[0028] By adopting the above technical solution, in the present application, the second abutting portion is set as an inclined semi-cylindrical surface, ensuring that the first abutting portion can move relatively upward along the second abutting portion during the downward movement of the key shaft. The inclined surface can make the relative movement process smoother, thus ensuring a better feel during the pressing process of the key switch and enhancing the user experience.

[0029] Further, a contact block is provided at the bottom of the first accommodating cavity, and the contact block is used to contact the magnetic shaft core after the key shaft moves downward by a certain distance.

[0030] By adopting the above technical solution, in the present application, a contact block is provided at the bottom of the first accommodating cavity so that the magnetic shaft core can contact the contact block during the pressing process of the key shaft to generate a sound, meeting the user's requirement for the key sound.

[0031] In summary, the present application includes at least one of the following beneficial technical effects:

[0032] 1. In the present application, the electric signal switch and the magnetic signal switch are integrated in one key switch. The magnetic shaft core realizes the on / off of the magnetic signal, and the electric contact component realizes the on / off of the electric signal. It is possible to switch the key switch to be turned on or off through the electric signal or the magnetic signal according to actual needs, which can meet the usage requirements of different users in different scenarios, enhance the user experience, and effectively save costs;

[0033] 2. In the present application, the fixed contact portion and the movable contact portion are set as two mutually perpendicular semi-cylindrical surfaces, ensuring that the contact surface between the fixed contact portion and the movable contact portion is electric. Under the same force condition, the pressure is greater, making it easier for the fixed contact portion and the movable contact portion to contact, and enhancing the service life of the electric contact component;

[0034] 3. By adopting the above technical solution, in the present application, the second abutting portion is set as an inclined semi-cylindrical surface, ensuring that the first abutting portion can move relatively upward along the second abutting portion during the downward movement of the key shaft. The inclined surface can make the relative movement process smoother, thus ensuring a better feel during the pressing process of the key switch and enhancing the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is the overall structural schematic diagram of an embodiment of the present application;

[0036] Figure 2 is the internal structural schematic diagram of an embodiment of the present application;

[0037] Figure 3 is the cross-sectional structural schematic diagram of an embodiment of the present application;

[0038] Figure 4 is the structural schematic diagram of the electric contact component and the key shaft of an embodiment of the present application;

[0039] Figure 5 It is a schematic diagram of the structure of the fixed terminal and the movable terminal of an embodiment of the present application;

[0040] Figure 6 is a schematic diagram of the cross-sectional structure of the embodiment of the present application after pressing;

[0041] In the figure, 1, top cover; 2, base; 21, first accommodating cavity; 22, contact block; 3, button shaft; 31, button handle; 32, second accommodating cavity; 321, undercut portion; 33, spring; 34, magnetic shaft core; 35, second abutting portion; 36, recessed portion; 4, electrical contact component; 41, pin; 42, fixed terminal; 421, fixed contact portion; 43, movable terminal; 431, movable contact portion; 432, elastic sheet; 433, first abutting portion. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1 -Attached Figure 6 , further details of this application are given.

[0043] The advantage of a magnetic signal switch is that it is highly sensitive and can sense tiny changes in the magnetic field, thereby achieving more precise control and a faster response speed. However, the disadvantage of a magnetic signal switch is that it is easily interfered by the external magnetic field, leading to operational errors, and is prone to failure in harsh environments such as high temperature and high humidity. The advantages of an electric signal switch are strong anti-interference, anti-vibration and anti-impact capabilities, but the disadvantage of an electric signal switch is that it cannot be used in high-voltage environments. Therefore, for different usage environments, users have different requirements for electric signal switches and magnetic signal switches. Using only one type of push button switch cannot simultaneously meet the usage requirements of all users in different situations, and using two push button switches for control at the same time has the problem of high cost. Therefore, an embodiment of the present application provides a push button switch that can turn on and off electric signals or magnetic signals, referring to Figure 1 and Figure 2 , including a top cover 1 and a base 2 that are mutually engaged, and a mounting cavity is formed inside the top cover 1 and the base 2, and a key shaft 3 and an electrical contact assembly 4 are arranged inside the mounting cavity, and the key shaft 3 is installed in the mounting cavity so as to be movable up and down and extends upward from the top of the top cover 1, and the portion of the key shaft 3 extending out of the top cover 1 is a key handle 31, which is used to facilitate the user to press the key shaft 3 when in use, so that the key shaft 3 can move downward within a certain range. The electrical contact assembly 4 is fixedly installed in the mounting cavity, and a pin 41 is arranged at the bottom of the electrical contact assembly 4, and the pin 41 extends downward from the bottom of the base 2, and the pin 41 is used to connect with a circuit board that receives the on-off signal of the key switch.

[0044] like Figure 3As shown, an inner part of the base 2 extends upward to form a first accommodation cavity 21, and a bottom part of the key shaft 3 extends downward to form a second accommodation cavity 32. The second accommodation cavity 32 is nested in the first accommodation cavity 21. A spring 33 is sleeved outside the first accommodation cavity 21 and the second accommodation cavity 32. The top of the spring 33 is fixedly connected to the key shaft 3, and the bottom of the spring 33 is fixedly connected to the base 2. Since the magnetic core 34 may fall off or become loose during the process of moving up and down along the first accommodation cavity 21 with the second accommodation cavity 32, a buckling part 321 is formed by inward protrusion at the bottom of the second accommodation cavity 32 in the embodiment of the present application. The buckling part 321 is used to fix the magnetic core 34 in the second accommodation cavity 32. In other embodiments, in addition to fixing the magnetic core 34 through the buckling part 321, other fixing methods can also be adopted.

[0045] In a specific implementation process, when a user presses the key handle 31 to move the key shaft 3 downward, the spring 33 is compressed to form an upward elastic force that balances the pressing force. When the pressing force disappears, the key shaft 3 moves upward under the push of the elastic force until the spring 33 resets, so that the key shaft 3 moves up and down in the installation cavity.

[0046] As Figure 3 shown, a magnetic core 34 is provided at the bottom of the key shaft 3. The magnetic core 34 is installed in the second accommodation cavity 32. The second accommodation cavity 32 is used to drive the magnetic core 34 to move up and down along the first accommodation cavity 21 when the key shaft 3 moves up and down. In a specific implementation process, the magnetic core 34 is a magnet. Since a circuit board for receiving the on-off signal of the key switch is provided at the bottom of the key switch, and a Hall sensor is installed at a position corresponding to the key switch on the circuit board. When the key shaft 3 is pressed, the magnetic core 34 moves downward, and the Hall sensor senses a positive change in the magnetic field to generate a magnetic signal to turn on the key switch. When the key shaft 3 resets, the magnetic core 34 moves upward, and the Hall sensor senses a reverse change in the magnetic field to generate a magnetic signal to turn off the key switch.

[0047] In a preferred embodiment, a contact block 22 is provided at the bottom of the first accommodation cavity 21. The contact block 22 is used to contact the magnetic core 34 after the key shaft 3 moves downward to a certain distance, so as to emit a knocking sound and meet the user's requirement for the key sound. In other embodiments, when there is no requirement for the key sound, the contact block 22 does not need to be provided, and the first accommodation cavity 21 can also be set to directly penetrate to the bottom.

[0048] As Figure 4 and Figure 5As shown, the contact assembly includes a fixed terminal 42 and a movable terminal 43. The fixed terminal 42 and the movable terminal 43 are fixed on the base 2. A fixed contact portion 421 is provided on one side of the fixed terminal 42 close to the movable terminal 43, and a movable contact portion 431 is provided on one side of the movable terminal 43 close to the fixed terminal 42. In the specific implementation process, when the fixed contact portion 421 and the movable contact portion 431 are in contact, the electrical signal is conducted and transmitted to the circuit board through the pins 41 of the fixed terminal 42 and the movable terminal 43. When the fixed contact portion 421 and the movable contact portion 431 are separated, the electrical signal is disconnected.

[0049] In a preferred embodiment, in order to ensure that the contact between the fixed contact portion 421 and the movable contact portion 431 is a point, the fixed contact portion 421 is a vertical semi-cylindrical surface, and the movable contact portion 431 is a horizontal semi-cylindrical surface. Under the same force, the pressure of point contact is greater, making it easier for the fixed contact portion 421 and the movable contact portion 431 to come into contact. In other embodiments, the fixed contact portion 421 and the movable contact portion 431 can also be of any other shape that can form a contact point or contact surface.

[0050] As Figure 4 and Figure 5 As shown, an elastic piece 432 is provided at the top of the movable terminal 43, and the movable contact portion 431 is located on the side of the elastic piece 432 close to the fixed terminal 42. The elastic piece 432 is used to separate the movable contact portion 431 from the fixed contact portion 421 when pressed, and to make the movable contact portion 431 contact the fixed contact portion 421 when restored. A first abutting portion 433 protruding towards the key shaft 3 is provided on the elastic piece 432 close to the key shaft 3. The first abutting portion 433 is used to abut against the key shaft 3 and press the elastic piece 432 when the key shaft 3 is stationary, and to separate from the key shaft 3 and make the elastic piece 432 move towards the fixed terminal 42 after the key shaft 3 moves downward by a certain distance. A second abutting portion 35 protruding towards the movable terminal 43 is provided at the abutting position of the key shaft 3 and the movable terminal 43, and a recess 36 is provided at the top of the second abutting portion 35. In a preferred embodiment, the first abutting portions 433 are provided on both sides of the fixed terminal 42, two second abutting portions 35 are correspondingly provided on the key shaft 3, and the fixed terminal 42 is installed between the two second abutting portions 35.

[0051] In the specific implementation process, when the key shaft 3 is not pressed, the first abutting portion 433 and the second abutting portion 35 are in abutment, so that the elastic piece 432 is kept in a compressed state. The elastic piece 432 generates an elastic force in the direction of the key shaft 3 to balance the pressure generated by the abutment, so that the movable contact portion 431 and the fixed contact portion 421 are kept separated and the electrical signal remains disconnected. When the key shaft 3 is pressed and moves downward, the first abutting portion 433 and the second abutting portion 35 move relatively. When moving a certain distance, the first abutting portion 433 disengages from the second abutting portion 35 and enters the space provided by the recessed portion 36, so that the elastic piece 432 moves in the direction close to the fixed terminal 42 under the push of the elastic force, making the movable contact portion 431 and the fixed contact portion 421 contact and the electrical signal conduct.

[0052] In a preferred implementation manner, the second abutting portion 35 is a semi-cylindrical surface inclined away from the movable terminal 43. It is ensured that the first abutting portion 433 can move relatively upward along the second abutting portion 35 during the downward movement of the key shaft 3, and the elastic piece 432 gradually moves in the direction close to the fixed terminal 42 under the push of the elastic force, and the inclined surface can make the relative movement process smoother. In other implementation manners, the second abutting portion 35 can also be any other shape that can enable the first abutting portion 433 to slide relatively up and down.

[0053] The implementation principle of the embodiment of the present application is: integrating the electrical signal switch and the magnetic signal switch in a key switch, where the magnetic axis core 34 realizes the on-off of the magnetic signal, and the electrical contact component 4 realizes the on-off of the electrical signal. It is possible to switch the key switch to conduct or cut off the electrical signal or the magnetic signal according to actual needs, which can meet the usage needs of different users in different scenarios, improve the user experience, and effectively save costs.

[0054] Regarding the principle of electrical signal conduction, as Figure 6 shown, assuming that a pressing force as shown by the arrow direction is applied to the key switch of the present application, the key shaft 3 moves downward a certain distance against the action of the spring 33, and the second abutting portion 35 of the key shaft 3 disengages from the first abutting portion 433 of the movable terminal 43, making the fixed contact portion 421 and the movable contact portion 431 of the fixed terminal 42 and the movable terminal 43 contact, thereby making the electrical signal conduct.

[0055] Regarding the principle of magnetic signal conduction, as Figure 6 shown, assuming that a pressing force as shown by the arrow direction is applied to the key switch of the present application, the key shaft 3 moves downward a certain distance against the action of the spring 33, and the magnetic axis core 34 moves downward a certain distance along with the key shaft 3. The Hall sensor located at the bottom of the key switch senses the change in the magnetic flux of the magnetic field exceeding its induction threshold, thereby making the magnetic signal conduct.

[0056] In the specific implementation process, the circuit board provided below the key switch is used to switch the on / off of different signals of the key switch. When the circuit board switches to the on / off of the electrical signal, the contact situation between the fixed terminal 42 and the movable terminal 43 is received through the pin 41 of the electrical contact component 4 to obtain the on / off situation of the electrical signal. When the circuit board switches to the on / off of the magnetic signal, the up and down movement situation of the magnetic axis core 34 is received through the Hall sensor to obtain the on / off situation of the magnetic signal. The user can select the on / off of the electrical signal and the on / off of the magnetic signal according to actual needs.

[0057] 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. A key switch capable of switching on and off electrical signals or magnetic signals, characterized in that: The device comprises a base (2), a top cover (1), a key shaft (3) and an electrical contact assembly (4); the top cover (1) and the base (2) are snap-connected to form an installation cavity inside; the key shaft (3) is installed in the installation cavity so as to be movable up and down and extends upward from the top of the top cover (1); and the electrical contact assembly (4) is installed in the installation cavity and extends downward from the bottom of the base (2); A magnetic shaft core (34) is provided at the bottom of the button shaft (3), and the interior of the base (2) extends upward to form a first accommodating cavity (21), and the magnetic shaft core (34) moves up and down along the first accommodating cavity (21).

2. A key switch capable of switching on and off electrical signals or magnetic signals according to claim 1, characterized in that: The bottom of the key shaft (3) extends downward to form a second accommodating cavity (32), the second accommodating cavity (32) is nested in the first accommodating cavity (21), the magnetic shaft core (34) is installed in the second accommodating cavity (32), and the second accommodating cavity (32) is used to drive the magnetic shaft core (34) to move up and down along the first accommodating cavity (21) when the key shaft (3) moves up and down; The first accommodating chamber (21) and the second accommodating chamber (32) are sleeved with springs (33) outside.

3. A key switch capable of switching on and off electrical signals or magnetic signals according to claim 2, characterized in that: The bottom of the second accommodating cavity (32) protrudes inwards to form an undercut portion (321), and the undercut portion (321) is used to fix the magnetic shaft core (34) in the second accommodating cavity (32).

4. A key switch capable of switching on and off electrical signals or magnetic signals according to claim 1, characterized in that: The electrical contact assembly (4) comprises a fixed terminal (42) and a movable terminal (43), wherein the fixed terminal (42) and the movable terminal (43) are fixed on the base (2); A fixed contact portion (421) is provided on one side of the fixed terminal (42) close to the movable terminal (43), and a movable contact portion (431) is provided on one side of the movable terminal (43) close to the fixed terminal (42).

5. A key switch capable of switching on and off electrical signals or magnetic signals according to claim 4, characterized in that: The fixed contact portion (421) is a vertical semi-cylindrical surface, and the movable contact portion (431) is a horizontal semi-cylindrical surface.

6. A key switch capable of switching on and off electrical signals or magnetic signals according to claim 4, characterized in that: An elastic sheet (432) is provided on the top of the movable terminal (43), and the movable contact portion (431) is located on a side of the elastic sheet (432) close to the fixed terminal (42); The elastic sheet (432) is used to separate the movable contact part (431) from the fixed contact part (421) when pressed, and to make the movable contact part (431) contact the fixed contact part (421) when restored.

7. A key switch capable of switching on and off electrical signals or magnetic signals according to claim 6, characterized in that: The elastic sheet (432) is provided with a first abutment portion (433) protruding in the direction of the key axis (3) near the key axis (3); The first abutment portion (433) is used to abut against the key shaft (3) and press the elastic sheet (432) when the key shaft (3) is stationary, and to separate from the key shaft (3) after the key shaft (3) moves downward to a certain distance, so as to move the elastic sheet (432) towards the fixed terminal (42).

8. A key switch capable of switching on and off electrical signals or magnetic signals according to claim 7, characterized in that: A second abutting portion (35) protruding in the direction of the movable terminal (43) is provided at the abutting point between the key shaft (3) and the movable terminal (43), and a recessed portion (36) is provided at the top of the second abutting portion (35).

9. A key switch capable of switching on and off electrical signals or magnetic signals according to claim 8, characterized in that: The second abutting portion (35) is a semi-cylindrical surface inclined in a direction away from the movable terminal (43).

10. A key switch capable of switching on and off electrical signals or magnetic signals according to any one of claims 1 to 9, characterized in that: A contact block (22) is provided at the bottom of the first accommodating cavity (21), and the contact block (22) is used to contact the magnetic shaft core (34) after the key shaft (3) moves downward to a certain distance.

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