Magnetic induction key and keyboard thereof

Abstract

The utility model relates to the technical field of magnetic induction keys, in particular to a magnetic induction key and a keyboard thereof. The magnetic induction key comprises a key shell, a magnetic part, a magnetic sensor and a PCB (Printed Circuit Board); the key shell comprises a pressing piece capable of being pressed and reset, and the magnetic piece is installed on the pressing piece; the magnetic piece is provided with an S pole and an N pole, and the S pole and the N pole are arranged side by side left and right in the pressing direction of the pressing piece; the magnetic sensor is electrically connected with the PCB, and the magnetic sensor is located on the side edge of the S pole or the N pole. When the pressing piece is in the initial state, the pressing limit state and the pressing process state, the induction face of the magnetic sensor is located between the upper surface and the lower surface of the magnetic piece. When the magnetic induction key is used, the calibration and calculation processes are simple, the needed calculation time is short, the initial stroke can be recognized in time, and the key switch triggers the corresponding function quickly.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic induction keys, in particular to a magnetic induction key and a keyboard thereof. Background Art

[0002] A linear Hall key (also called a magnetic axis) converts the pressing action of a user into an electrical signal output through the change of magnetic flux. A brief schematic diagram of the working mode of an existing linear Hall key switch is as Figure 1 shown. The S pole and N pole of a magnet 6 are arranged up and down. When the user presses the handle, the handle drives the magnet 6 fixed therein to approach or move away from a Hall effect sensor 7 directly below it, so that the Hall effect sensor 7 senses the magnetic field change in the vertical direction and generates a corresponding output signal. The output signal is calibrated and calculated to obtain the key stroke pressed by the user. When the pressed key stroke reaches a preset function threshold, the corresponding function is triggered.

[0003] The stroke-magnetic flux curve of the existing linear Hall key switch is as Figure 2 shown. The linearity of its curve is poor, and the curve is close to an inverse proportional function curve. When the magnet of the key and the Hall effect sensor move relative to each other when the user presses the key, the change of the magnetic flux received by the Hall effect sensor is uneven. This will result in poor accuracy when calibrating and calculating the key stroke using the existing linear Hall key switch. And because the magnetic field change amount in the first half of the key stroke of this curve is much smaller than that in the second half of the key stroke, especially the magnetic field change amount in a small section at the beginning of the key stroke is extremely small, the accuracy in the first half of the key stroke is much lower than that in the second half, and a small section at the beginning of the stroke cannot be recognized, that is, what is commonly called the "top dead zone" in the industry.

[0004] Therefore, there is an urgent need for a magnetic induction key that can solve the problems that the stroke-magnetic flux curve of the existing linear Hall key is close to an inverse proportional function curve, its calibration and calculation processes are relatively complex, it requires a long calculation time, the initial stroke cannot be recognized, and the key switch triggers the corresponding function slowly. Summary of the Utility Model

[0005] Embodiments of the utility model provide a magnetic induction key and a keyboard thereof to solve the problems that the stroke-magnetic flux curve of the existing linear Hall key is close to an inverse proportional function curve, its calibration and calculation processes are relatively complex, it requires a long calculation time, the initial stroke cannot be recognized, and the key switch triggers the corresponding function slowly.

[0006] The utility model discloses a magnetic induction key, which comprises a key housing, a magnetic member, a magnetic sensor and a PCB board; the key housing includes a pressing member that can be pressed and reset, and the magnetic member is installed on the pressing member; the magnetic member has an S pole and an N pole, and in the pressing direction of the pressing member, the S pole and the N pole are arranged side by side left and right; the magnetic sensor is electrically connected to the PCB board, and the magnetic sensor is located on the side of the S pole or the N pole;

[0007] Wherein, in the initial state, the pressing limit state and the pressing process state of the pressing member, the sensing surface of the magnetic sensor is between the upper surface and the lower surface of the magnetic member.

[0008] Optionally, the travel distance of the pressing member from the initial state to the pressing limit state is 30% to 100% of the height of the magnetic member in the pressing direction.

[0009] Optionally, the distance between the sensing surface of the magnetic sensor and the S pole or the N pole close to the magnetic sensor is 0.1 - 5.0 mm.

[0010] Optionally, there are at least two magnetic members, and the magnetic members are all arranged beside the magnetic sensor; the magnetic poles of the magnetic members facing the magnetic sensor are the same.

[0011] Optionally, there are two magnetic members, which are arranged opposite to each other, and the magnetic sensor is located between the two magnetic members; or

[0012] There are three magnetic members, and the three magnetic members are respectively located on one side of the magnetic sensor; or

[0013] There are four magnetic members, and the four magnetic members are arranged in pairs opposite to each other, and the magnetic sensor is located in the space surrounded by the four magnetic members.

[0014] Optionally, a first mounting post is provided on the pressing member, an installation cavity is provided in the first mounting post, and the magnetic member is installed in the installation cavity; the key housing further includes a base and an upper shell, the upper shell is installed on the base, and the pressing member is movably installed in the base and the upper shell; a socket column is provided in the base, and an insertion cavity is provided in the socket column; the first mounting post is inserted into the insertion cavity; the base is installed on the PCB board, a through hole is provided on the PCB board corresponding to the insertion cavity, and the bottom of the insertion cavity is open; or

[0015] A first mounting post is provided on the pressing member, an installation cavity is provided in the first mounting post, and the magnetic member is installed in the installation cavity; the key housing further includes a base and an upper shell, the upper shell is installed on the base, and the pressing member is movably installed in the base and the upper shell; a socket column is provided in the base, and an insertion cavity is provided in the socket column; the first mounting post is inserted into the insertion cavity; the bottom of the insertion cavity is sealed.

[0016] Optionally, the magnetic sensor is installed on the PCB board; or

[0017] The magnetic sensor is mounted on the PCB board through a raised mounting member, and the raised mounting member mounts the magnetic sensor relative to the PCB board at a raised position; or

[0018] The magnetic sensor is installed inside the key housing and electrically connected to the PCB board through an electrical connector.

[0019] Optionally, the magnetic sensor is a Hall effect sensor or a magnetoresistive effect sensor.

[0020] Optionally, the magnetic member is a magnet, magnetic plastic or magnetic ceramic.

[0021] The present utility model also discloses a keyboard, including the magnetic induction key as described above.

[0022] Compared with the prior art, the beneficial effect of the magnetic induction key provided by the embodiment of the present utility model is that: in the magnetic induction key of the present utility model, the magnetic sensor is arranged beside the magnetic member. When the user presses the pressing member and the magnetic member and the Hall effect sensor have a relative displacement, the magnetic flux received by the magnetic sensor changes. At the same time, the sensing surface of the magnetic sensor is located between the upper surface and the lower surface of the magnetic member. In this way, referring to Figure 9 the relationship between the magnetic flux change and the pressing stroke of the magnetic member (i.e., the moving stroke of the magnetic member) of the magnetic member of the present utility model shown, combined with Figure 7 and Figure 8 shown, when the pressing member is in the initial state to the pressing limit state, the sensing surface of the magnetic sensor is located between the upper surface and the lower surface of the magnetic member, and the magnetic flux received by the sensing surface of the magnetic sensor is the magnetic flux of the line segment from point A to point B in Figure 9 . It can be seen from Figure 9 that the line segment of the magnetic flux of the curve part from point A to point B is closer to a straight line. That is to say, when the sensing surface of the magnetic sensor moves within the range between the upper surface and the lower surface of the magnetic member, the change in the received magnetic flux is more uniform. In this way, during the use of the magnetic induction key, the calibration and calculation processes are relatively simple, the required calculation time is shorter, the initial stroke can be recognized in time, and the key switch triggers the corresponding function faster. Description of the Drawings

[0023] The technical solution of the present utility model will be further described in detail below in conjunction with the drawings. In the drawings:

[0024] Figure 1 is a schematic diagram of the positional relationship between the magnet and the Hall effect sensor of the current linear Hall key;

[0025] Figure 2 is a schematic diagram of the magnet stroke and the magnetic flux received by the Hall effect sensor of the current linear Hall key;

[0026] Figure 3 is a schematic diagram of the magnetic induction key of the embodiment of the present utility model;

[0027] Figure 4 is another schematic diagram of the magnetic induction button according to the embodiment of the present utility model;

[0028] Figure 5 is Figure 4 a cross-sectional view taken along the A-A direction in

[0029] Figure 6 is an exploded schematic diagram of the magnetic induction button according to the embodiment of the present utility model;

[0030] Figure 7 is a schematic diagram of the initial position relationship between the magnetic member and the magnetic sensor according to the embodiment of the present utility model;

[0031] Figure 8 is a schematic diagram of the position relationship in the pressing limit state between the magnetic member and the magnetic sensor according to the embodiment of the present utility model;

[0032] Figure 9 is a schematic diagram of the stroke of the magnetic member and the magnetic flux received by the magnetic sensor according to the embodiment of the present utility model;

[0033] Figure 10 is a schematic diagram of the pressing member according to the embodiment of the present utility model;

[0034] Figure 11 is a schematic diagram of the base according to the embodiment of the present utility model;

[0035] Figure 12 is another schematic diagram of the pressing member according to the embodiment of the present utility model;

[0036] Figure 13 is a schematic diagram of the upper shell according to the embodiment of the present utility model;

[0037] Figure 14 is a schematic diagram of the magnetic induction button with two magnetic members according to the embodiment of the present utility model;

[0038] Figure 15 is Figure 14 a cross-sectional view taken along the B-B direction in

[0039] Figure 16 is an exploded schematic diagram of the magnetic induction button with two magnetic members according to the embodiment of the present utility model;

[0040] Figure 17 is a schematic diagram of the pressing member of the magnetic induction button with two magnetic members according to the embodiment of the present utility model;

[0041] Figure 18 is a schematic diagram of the position relationship between the two magnetic members and the magnetic sensor according to the embodiment of the present utility model when two magnetic members are provided;

[0042] Figure 19It is a schematic diagram of the positional relationship between the three magnetic components and the magnetic sensor in the embodiment of the present utility model;

[0043] Figure 20 It is a schematic diagram of the positional relationship between the four magnetic components and the magnetic sensor in the embodiment of the present utility model.

[0044] The reference numerals in the figure are as follows:

[0045] 1. Button housing; 11. Pressing member; 111. First mounting post; 111a. Mounting cavity; 112. Sliding convex portion; 112a. Rib; 112b. First convex portion; 113. Sleeve post; 12. Base; 121. Socket post; 121a. Insertion cavity; 122. Chute; 123. Insertion post; 13. Upper shell; 131. Opening; 132. First accommodation port; 132a. Second groove; 133. First rib; 2. Magnetic component; 21. Upper surface; 22. Lower surface; 3. Magnetic sensor; 31. Sensing surface; 4. PCB board; 41. Through hole; 42. Jack; 43. Elevated mounting member; 5. Spring; 6. Magnet; 7. Hall effect sensor. Detailed implementation manners

[0046] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. Now, with reference to the accompanying drawings, the preferred embodiments of the present utility model will be described in detail.

[0047] The embodiment of the present utility model provides a magnetic induction button, as Figures 3 to 8 shown. The magnetic induction button includes a button housing 1, a magnetic component 2, a magnetic sensor 3, and a PCB board 4; the button housing 1 includes a pressing member 11 that can be pressed and reset, and the magnetic component 2 is installed on the pressing member 11; the magnetic component 2 has an S pole and an N pole, and in the pressing direction of the pressing member 11, the S pole and the N pole are arranged side by side left and right; the magnetic sensor 3 is electrically connected to the PCB board 4, and the magnetic sensor 3 is located on the side of the S pole or the N pole. Among them, in the initial state, the pressing limit state, and the pressing process state of the pressing member 11, the sensing surface 31 of the magnetic sensor 3 is always between the upper surface 21 and the lower surface 22 of the magnetic component 2.

[0048] In the magnetic induction button of the present utility model, the magnetic sensor 3 is arranged beside the magnetic component 2. When the user presses the pressing member 11 and the magnetic component 2 and the Hall effect sensor 7 are displaced relative to each other, the magnetic flux received by the magnetic sensor 3 changes. At the same time, the sensing surface 31 of the magnetic sensor 3 is always between the upper surface 21 and the lower surface 22 of the magnetic component 2. In this way, referring to Figure 9 the relationship between the magnetic flux change and the pressing stroke of the magnetic component 2 and the pressing member 11 (i.e., the moving stroke of the magnetic component 2) of the present utility model shown, combined with Figure 7 and Figure 8As shown, when the pressing member 11 is in the initial state to the pressing limit state, the sensing surface 31 of the magnetic sensor 3 is between the upper surface 21 and the lower surface 22 of the magnetic member 2, and the magnetic flux received by the sensing surface 31 of the magnetic sensor 3 is Figure 9 the magnetic flux of the line segment from point A to point B in Figure 9 As can be seen from Figure 9 , the line segment of the magnetic flux of the curve from point A to point B is closer to a straight line. That is to say, when the sensing surface 31 of the magnetic sensor 3 moves within the range between the upper surface 21 and the lower surface 22 of the magnetic member 2, the change in the received magnetic flux is more uniform. In this way, the calibration and calculation processes during the use of the magnetic induction button are relatively simple, the required calculation time is shorter, the initial stroke can be recognized in a timely manner, and the button switch can trigger the corresponding function faster.

[0049] Specifically, in combination with Figure 5 as shown, taking Figure 7 and Figure 8 as an example, the pressing member 11 is provided for the user to press. When the user presses the pressing member 11 downward, the magnetic member 2 thereon is driven to move downward, so as to generate a relative movement with the magnetic sensor 3, and the magnetic sensor 3 receives a uniformly changing magnetic flux. Taking Figure 5 or Figure 7 as an example, in the present utility model, the S pole and the N pole of the magnetic member 2 are arranged side by side left and right in the pressing direction of the pressing member 11, rather than the traditional up and down arrangement, so that the magnetic sensor 3 located on the side can be in the magnetic field region. More importantly, the sensing surface 31 of the magnetic sensor 3 is between the upper surface 21 and the lower surface 22 of the magnetic member 2, which makes the sensing surface 31 of the magnetic sensor 3 located in a magnetic field with a more uniform change in magnetic flux.

[0050] The magnetic sensor 3 is electrically connected to the PCB board 4. It can be directly installed on the PCB board 4 as described below, or the magnetic sensor 3 can be installed on, for example, the button housing 1 or the elevation mounting member 43, and then the electrical connection is realized through an electrical connection member, which is not specifically limited herein.

[0051] Specifically, for the specific installation of the magnetic sensor 3, in one embodiment, as Figure 6As shown, the magnetic sensor 3 is mounted on the PCB board 4, that is, the magnetic sensor 3 can be directly soldered to the PCB board 4 through pins. In another embodiment, the magnetic sensor is mounted on the PCB board through a raised mounting member 43, and the raised mounting member 43 mounts the magnetic sensor 3 at a raised position relative to the PCB board 4. In this embodiment, the mounting position of the magnetic sensor 3 can be raised through the raised mounting member 43, facilitating the installation and design of the magnetic member 2. The raised mounting member 43 can be a circuit board. While raising the mounting position of the magnetic sensor 3, electrical connection with the PCB board 4 can be achieved through the circuit board. The raised mounting member 43 can also be an ordinary plastic part, etc., as long as it can provide a mounting position for the magnetic sensor 3. At this time, the magnetic sensor 3 is electrically connected to the PCB board 4 through its own pins, etc. In another embodiment, the magnetic sensor 3 is mounted inside the key housing 1 and is electrically connected to the PCB board 4 through an electrical connector. For example, it is mounted in the following base 12, and then led out from the base 12 through longer pins or other electrical connectors such as wires and electrically connected to the PCB board 4. In this embodiment, the mounting position of the magnetic sensor 3 can be raised, facilitating the installation and design of the magnetic member 2. Specifically, the magnetic sensor 3 is a Hall effect sensor 7 or a magnetoresistive effect sensor. The magnetoresistive effect sensor can be, for example, giant magnetoresistance (GMR), colossal magnetoresistance (CMR), anisotropic magnetoresistance (AMR), tunneling magnetoresistance (TMR), ballistic magnetoresistance (BMR), and extraordinary magnetoresistance (EMR). The magnetic member can be a magnet, magnetic plastic, or magnetic ceramic.

[0052] The magnetic sensor 3 is located on the side of the S pole or the N pole. It can be that the magnetic sensor 3 is located on the side of the S pole, or as Figure 7 shown, the magnetic sensor 3 is located on the side of the N pole.

[0053] When the pressing member 11 is not pressed, the pressing member 11 resets. At this time, the pressing member 11 is in the initial state. When the pressing member 11 is pressed to the maximum stroke state, this is the pressing limit state of the pressing member 11. When the pressing member 11 is pressed but not pressed to the pressing limit state, this is the pressing process state of the pressing member 11, that is, the process from the start of pressing the pressing member 11 to pressing it to the maximum stroke is the pressing process state. Since the magnetic member 2 is mounted on the pressing member 11 and moves with it, when the pressing member 11 is pressed and moves downward, a relative displacement is generated between the magnetic member 2 and the magnetic sensor 3.

[0054] For the specific installation of the key housing 1, the key housing 1 can be directly on the PCB board 4, or can be mounted on, for example, the frame housing of a keyboard, etc. Specific limitations are not made here. Specifically, the magnetic member 2 is a magnet 6.

[0055] Specifically, the travel distance of the pressing member 11 from the initial state to the pressing limit state is 30% to 100% of the height of the magnetic member 2 in the pressing direction. In this solution, within the range where the travel distance of the pressing member 11 from the initial state to the pressing limit state is 30% to 100% of the height of the magnetic member 2 in the pressing direction, the magnetic flux received by the magnetic sensor 3 is in the Figure 9 magnetic flux of the line segment from point C to point D in Figure 9 . As can be seen from

[0056] , the line segment of the magnetic flux of the curve from point C to point D is closer to a straight line. That is to say, when the sensing surface 31 of the magnetic sensor 3 moves within the range between the upper surface 21 and the lower surface 22 of the magnetic member 2, the change in the received magnetic flux is more uniform. In this way, the calibration and calculation processes during the use of the magnetic induction button are relatively simple, the required calculation time is short, the initial stroke can be recognized in time, and the button switch triggers the corresponding function quickly.

[0057] Specifically, in an embodiment, as Figures 14 to 19 shown, there are at least two magnetic members 2, and the magnetic members 2 are all arranged beside the magnetic sensor 3; the magnetic poles of the magnetic members 2 facing the magnetic sensor 3 are the same. The setting of at least two magnetic members 2 increases the magnetic flux. Correspondingly, the change in the magnetic flux also increases accordingly, that is, it can increase the change in the magnetic flux of the magnetic sensor 3 from the initial state to the pressing limit state of the pressing member 11, improve the accuracy, reduce the interference of the external magnetic field, and improve the signal-to-noise ratio of the output signal of the magnetic induction button. In a specific embodiment, as Figures 14 to 18 shown, there are two magnetic members 2, and the two magnetic members 2 are arranged opposite to each other, and the magnetic sensor 3 is located between the two magnetic members 2. In another specific embodiment, as Figure 19 shown, there are three magnetic members 2, and the three magnetic members 2 are respectively located on one side of the magnetic sensor 3. In another specific embodiment, as Figure 20 shown, there are four magnetic members 2, and the four magnetic members 2 are arranged in pairs opposite to each other, and the magnetic sensor 3 is located in the space surrounded by the four magnetic members 2.

[0058] Furthermore, for the specific installation of the magnetic member 2, as Figure 5 and Figure 10As shown, a first mounting post 111 is provided on the pressing member 11. An installation cavity 111a is formed in the first mounting post 111, and the magnetic member 2 is installed in the installation cavity 111a. Installing the magnetic member 2 in the installation cavity 111a can achieve a firm installation. Specifically, the installation cavity 111a may have an opening 131 at the bottom, and the magnetic member 2 is inserted into the installation cavity 111a through the bottom opening 131, and the magnetic member 2 can be fixed in the installation cavity 111a by interference fit. In another embodiment, the installation cavity 111a may have an opening at the top. Of course, on this basis, the magnetic member 2 can be further adhesively fixed with glue. As Figures 14 to 19 shown, when there are two, three or four magnetic members 2 as described above, the pressing member 11 is provided with the corresponding number of first mounting posts 111, and an installation cavity 111a is formed in each first mounting post 111. The magnetic members 2 are respectively installed in the corresponding installation cavities 111a. At this time, the spring 5 can be installed through a sleeve post 113 additionally provided on the pressing member 11. The magnetic member 2 can be cylindrical or cuboid-shaped. The installation cavity 111a can be set to adapt to the shape of the magnetic member 2 or not, which will not be elaborated here.

[0059] Furthermore, as Figure 5 and Figure 6 shown, the key housing 1 further includes a base 12 and an upper shell 13. The upper shell 13 is installed on the base 12, and the pressing member 11 is movably installed within the base 12 and the upper shell 13; the top of the pressing member 11 exposes from the opening 131 at the top of the upper shell 13; a spring 5 is sleeved on the first mounting post 111, and the spring 5 abuts against the base 12 and the pressing member 11 respectively. The installation of the pressing member 11 is achieved by providing the base 12 and the upper shell 13. The top of the pressing member 11 exposes from the opening 131 at the top of the upper shell 13, which is convenient for the user to press. A key cap can be further installed on the top of the pressing member 11, which will not be elaborated here. The spring 5 sleeved on the first mounting post 111 can provide an elastic restoring force after the pressing member 11 is pressed, realizing the automatic reset of the pressing member 11 after it is not pressed. When the user presses the pressing member 11, the spring 5 is compressed and stores energy. Specifically, when the magnetic induction key is directly installed on the PCB board 4, the magnetic induction key is installed on the PCB board 4 through the base 12. The base 12 and the upper shell 13 can be snapped together.

[0060] Specifically, further in combination with Figure 11As shown, a socket column 121 is provided inside the base 12, and an insertion cavity 121a is formed in the socket column 121; one end of the spring 5 is sleeved on the socket column 121, and the first mounting column 111 is inserted into the insertion cavity 121a. The setting of the socket column 121 can make the spring 5 more stably installed on the base 12, and the insertion of the first mounting column 111 into the insertion cavity 121a can improve the installation stability and movement stability of the first mounting column 111. The base 12 is installed on the PCB board 4, and a through hole 41 corresponding to the insertion cavity 121a is provided on the PCB board 4, and the bottom of the insertion cavity 121a is open 131. The provision of the through hole 41 corresponding to the insertion cavity 121a on the PCB board 4 can avoid the downward moving first mounting column 111 through the through hole 41, reduce the height of the magnetic induction button in the longitudinal direction, and make the structure of the magnetic induction button more compact, which is beneficial to miniaturization. Specifically, a plug column 123 is provided at the bottom of the base 12, and the plug column 123 is inserted into the jack 42 of the PCB board 4 to achieve fixed installation. In another embodiment, the bottom of the insertion cavity 121a is sealed, that is, the bottom of the insertion cavity 121a is not open. This can make the knocking sound more pleasant when the button is knocked.

[0061] Combined with Figure 6 and Figure 12 As shown, sliding protrusions 112 extending along its pressing direction are provided on opposite sides of the pressing member 11; sliding grooves 122 extending along the pressing direction of the pressing member 11 are provided on opposite sides of the base 12 corresponding to the sliding protrusions 112; the sliding protrusions 112 are embedded in the sliding grooves 122. The sliding grooves 122 can limit the sliding protrusions 112 when the pressing member 11 moves up and down, thereby improving the stability of the pressing member 11 moving up and down. Specifically, on the surface of the sliding protrusion 112 facing the sliding groove 122, convex strips 112a are provided on both sides extending along the pressing direction of the pressing member 11, and the convex strips 112a extend along the pressing direction of the pressing member 11. The setting of the convex strips 112a can further improve the cooperation between the sliding protrusion 112 and the sliding groove 122, and improve the guiding stability of the sliding protrusion 112 in the sliding groove 122. As Figure 13 shown, first accommodation openings 132 are formed on the edges corresponding to the sliding grooves 122 at the opening 131 of the upper shell 13, and the first accommodation openings 132 face the corresponding sliding grooves 122. The first accommodation openings 132 and the sliding grooves 122 jointly form an accommodation space and a stroke sliding space for the sliding protrusions 112. The setting of the first accommodation openings 132 can make full use of the space of the upper shell 13 to accommodate the sliding protrusions 112 and improve the structural compactness of the magnetic induction button.

[0062] A second groove 132a is formed on the edge of the first accommodation opening 132 facing the sliding groove 122, and a first protrusion 112b is provided on the top of the sliding protrusion 112; when the pressing member 11 is in the initial state, the first protrusion 112b is embedded in the second groove 132a. In the initial state of the pressing member 11 in this solution, the first protrusion 112b is embedded in the second groove 132a to form a limit, which can improve the stability of the pressing member 11 in the initial state and avoid shaking. Specifically, the shapes of the second groove 132a and the first protrusion 112b are trapezoidal frustum shapes that are larger at the bottom and smaller at the top, which facilitates the second protrusion to be embedded in the first groove.

[0063] Furthermore, first convex strips 133112a extending along the pressing direction of the pressing member 11 are respectively provided on both sides of the peripheral wall surface of the opening 131 of the upper shell 13. The first convex strips 133112a on the peripheral wall surface of the opening 131 of the upper shell 13 can limit the pressing member 11, avoid shaking during its pressing movement and in the initial state, and improve the stability during pressing movement and the stability in the initial state.

[0064] The present utility model also discloses a keyboard, including the magnetic induction key as described above. Due to the above magnetic induction key, this keyboard has the same technical effects as the above magnetic induction key, which will not be elaborated here.

[0065] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit it. For those skilled in the art, the technical solutions recorded in the above embodiments can be modified, or some of the technical features can be equivalently replaced; and all such modifications and replacements should fall within the protection scope of the appended claims of the present utility model.

Claims

1. A magnetic induction button, characterized in that, It includes a key housing, a magnetic member, a magnetic sensor and a PCB board; the key housing includes a pressing member that can be pressed and reset, and the magnetic member is installed on the pressing member; the magnetic member has an S pole and an N pole, and in the pressing direction of the pressing member, the S pole and the N pole are arranged side by side left and right; the magnetic sensor is electrically connected to the PCB board, and the magnetic sensor is located on the side of the S pole or the N pole. Wherein, in the initial state, the pressing limit state and the pressing process state of the pressing member, the sensing surface of the magnetic sensor is between the upper surface and the lower surface of the magnetic member.

2. The magnetic induction button according to claim 1, wherein The travel distance of the pressing member from the initial state to the pressing limit state is 30% to 100% of the height of the magnetic member in the pressing direction.

3. The magnetic induction button according to claim 1, wherein The distance between the sensing surface of the magnetic sensor and the S pole or N pole close to the magnetic sensor is 0.1 - 5.0 mm.

4. The magnetic induction button according to claim 1, wherein There are at least two magnetic members, and all the magnetic members are arranged beside the magnetic sensor; the magnetic poles of the magnetic members facing the magnetic sensor are the same.

5. The magnetic induction button according to claim 4, characterized in that There are two magnetic members, and the two magnetic members are arranged opposite to each other, and the magnetic sensor is located between the two magnetic members; or There are three magnetic members, and the three magnetic members are respectively located on one side of the magnetic sensor; or There are four magnetic members, and the four magnetic members are arranged in pairs opposite to each other, and the magnetic sensor is located in the space surrounded by the four magnetic members.

6. The magnetic induction button according to any one of claims 1 to 4, characterized in that, A first mounting post is provided on the pressing member, an installation cavity is provided in the first mounting post, and the magnetic member is installed in the installation cavity; the key housing further includes a base and an upper shell, the upper shell is installed on the base, and the pressing member is movably installed in the base and the upper shell; a socket post is provided in the base, and the socket post is provided with an insertion cavity; the first mounting post is inserted into the insertion cavity; the base is installed on the PCB board, and a through hole corresponding to the insertion cavity is provided on the PCB board, and the bottom of the insertion cavity is open; or A first mounting post is provided on the pressing member, an installation cavity is provided in the first mounting post, and the magnetic member is installed in the installation cavity; the key housing further includes a base and an upper shell, the upper shell is installed on the base, and the pressing member is movably installed in the base and the upper shell; a socket post is provided in the base, and the socket post is provided with an insertion cavity; the first mounting post is inserted into the insertion cavity; the bottom of the insertion cavity is sealed.

7. The magnetic induction button according to any one of claims 1 to 4, characterized in that The magnetic sensor is installed on the PCB board; or The magnetic sensor is installed on the PCB board through a lifting mounting member, and the lifting mounting member mounts the magnetic sensor relative to the PCB board at a higher position; or The magnetic sensor is installed in the key housing and is electrically connected to the PCB board through an electrical connection member.

8. The magnetic induction key according to any one of claims 1 to 4, characterized in that, The magnetic sensor is a Hall effect sensor or a magnetoresistive effect sensor.

9. The magnetic induction button according to any one of claims 1 to 4, characterized in that, The magnetic member is a magnet, magnetic plastic or magnetic ceramic.

10. A keyboard, characterized in that, It includes the magnetic induction key according to any one of claims 1 to 9.

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