Hall sensor magnetic axis switch

Abstract

The utility model discloses a Hall sensor magnetic shaft switch, which comprises a base detachably mounted on a keyboard circuit board, a cover covering the base, a reset spring sleeved in the middle of the base, and a guide core of which the upper end penetrates through the cover and the lower end is pressed against the reset spring, the cover plate is arranged at the lower end of the base; the switch circuit board is arranged on the cover plate; the Hall element is arranged on the cover plate and is electrically connected with the switch circuit board; the at least two groups of conduction terminals are electrically connected with the switch circuit board and integrally extend downwards to be conducted with the keyboard circuit board; according to the utility model, the Hall element is arranged inside the key switch, so that the key switch can be freely plugged on the keyboard circuit board and can be freely replaced by other key switches, the adaptation degree of the keyboard is improved, the use of people is facilitated, the requirements of people for different key switches are met, and the use experience of people is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of key switches, in particular to a Hall sensor magnetic axis switch. Background Art

[0002] Generally, the conduction principle of a key switch is that the up and down movement of a guide core triggers the conduction and disconnection of a conduction component, thereby realizing the conduction and disconnection functions of the key switch. The conduction component usually consists of a static piece and a moving piece, and the conduction and disconnection functions are realized by the moving contact of the moving piece triggered by the guide core contacting and separating from the static contact of the static piece.

[0003] After the key switch is used for a long time, the moving contact of the moving piece and the static contact of the static piece contact and separate frequently. After a long time, the surface is prone to wear, the service life is short, the use stability and safety performance of the key switch are affected, and even the conduction and disconnection functions cannot be realized.

[0004] In order to avoid the problem that the moving piece and the static piece cannot be used due to excessive contact, a structure using a Hall sensor and a magnet in cooperation has emerged on the market. The Hall sensor is arranged on the circuit board. When people press the key switch, the magnet in the key switch moves downward close to the Hall sensor, and thus the Hall sensor senses and transmits an output signal. Although this method avoids the problem of wear caused by frequent contact between the moving piece and the static piece, since the Hall sensor is arranged on the circuit board, this kind of circuit board can only use this kind of key switch and cannot use other key switches. For users who want to replace different key switches, if they want to replace the key switch, they need to replace the entire keyboard, which cannot meet the needs of contemporary users for different key switches and affects people's use experience. Summary of the Utility Model

[0005] Aiming at the above deficiencies, the purpose of the utility model is to provide a Hall sensor magnetic axis switch, in which the Hall element is arranged inside the key switch, and there is no need to additionally arrange the Hall element on the keyboard circuit board, so that this key switch can be freely plugged and unplugged on the keyboard circuit board and can be freely replaced with other key switches, improving the adaptability of the keyboard, facilitating people's use, meeting people's needs for different key switches, and ensuring people's use experience.

[0006] The technical solution adopted by the utility model to achieve the above purpose is:

[0007] A Hall sensor magnetic axis switch includes a base detachably mounted on a keyboard circuit board, a lid covering the base, a return spring sleeved on the middle of the base, a guide core with its upper end passing through the lid and its lower end pressing against the return spring. It further includes a cover plate arranged at the lower end of the base, a switch circuit board arranged on the cover plate, a Hall element arranged on the cover plate and electrically connected to the switch circuit board, at least two groups of conduction terminals electrically connected to the switch circuit board and extending downward integrally to conduct with the keyboard circuit board, and a magnet arranged on the guide core and facing the Hall element.

[0008] As a further improvement of the present utility model, there are three groups of the conduction terminals, including a first terminal fixedly arranged on the cover plate and electrically connected to the switch circuit board, a second terminal fixedly arranged on the cover plate and electrically connected to the switch circuit board, and a third terminal fixedly arranged on the cover plate and electrically connected to the switch circuit board.

[0009] As a further improvement of the present utility model, the third terminal includes a third cylinder arranged on the cover plate and extending downward, and a sphere arranged at the lower end of the third cylinder.

[0010] As a further improvement of the present utility model, a first through hole for the upper end of the first terminal to pass through is formed on the cover plate, a second through hole for the upper end of the second terminal to pass through is formed on the cover plate, and a third through hole for the upper end of the third terminal to pass through is formed on the cover plate.

[0011] As a further improvement of the present utility model, a magnet mounting block protruding outward is formed on the outer side wall of the guide core, and a magnet mounting groove for the magnet to be embedded is formed at the lower end of the magnet mounting block.

[0012] As a further improvement of the present utility model, at least one reinforcing strip protruding inward is formed on the inner wall of the magnet mounting groove.

[0013] As a further improvement of the present utility model, the number of the reinforcing strips is four groups, which are evenly arranged in a ring on the inner wall of the magnet mounting groove in sequence.

[0014] As a further improvement of the present utility model, the switch body further includes a light guide column arranged between the base and the lid and on one side of the magnet and the Hall element.

[0015] The beneficial effects of the present utility model are:

[0016] (1) By adopting the method of using a Hall element to sense the magnet, it effectively avoids the physical wear caused by the contact between the traditional moving piece and the static piece, extends the service life and feel of the key switch. Moreover, the Hall element has a fast response speed, can detect the change of the key state in real time, and has good anti-interference ability, effectively ensuring the normal operation of the keyboard. By arranging the Hall element inside the switch body and the conduction terminals can be freely inserted and unplugged corresponding to the keyboard circuit board, so that the entire switch body can be freely inserted and unplugged on the keyboard circuit board, which is conducive to replacing the switch body for maintenance and other operations.

[0017] (2) There are 3 groups of conduction terminals correspondingly arranged on the switch circuit board, and the 3 groups of terminals are respectively conductively connected to the three pins of the Hall element to realize the power supply and signal transmission of the Hall element. By setting the third group of terminals as telescopic terminals, the structure of the telescopic terminals enables the third terminal to adjust its own height according to the height at which the first terminal and the second terminal are inserted into the keyboard circuit board when it is pressed against the keyboard circuit board, and it can be conductively connected to the keyboard circuit board when it is pressed, thus realizing the conduction between the Hall element and the keyboard circuit board and transmitting signals to the keyboard circuit board to realize operations such as typing. When the user wants to replace the switch body with other key switches such as a common mechanical switch or an optical axis switch, the switch body can also be pulled out and the other key switch can be correspondingly inserted into 2 groups of conduction contacts on the keyboard circuit board, so as to realize the normal conduction and use of the other key switch. By opening 3 groups of conduction contacts on the keyboard circuit board, in addition to meeting the normal conduction of the 3 groups of terminals of the Hall element, it can also be compatible with other key switches such as common mechanical switches and optical axis switches at the same time, avoiding the problem that the user has to replace the entire keyboard when replacing the key switch, improving the adaptability of the keyboard, facilitating people's use, meeting people's needs for different key switches, and ensuring people's use experience.

[0018] The above is an overview of the technical solution of the utility model. The following will further describe the present utility model in conjunction with the drawings and specific embodiments. Brief Description of the Drawings

[0019] Figure 1 is the overall schematic diagram of the present utility model;

[0020] Figure 2 is the schematic diagram of the structure inside the base;

[0021] Figure 3 is the exploded view of the present utility model;

[0022] Figure 4 is the partial structural schematic diagram of the Hall element sensing the magnet;

[0023] Figure 5 is the partial structural schematic diagram of the Hall element sensing the magnet from another angle;

[0024] Figure 6 An exploded view of the guide core and the magnet;

[0025] Figure 7 A partial circuit diagram of the present utility model;

[0026] In the figure: 1, base; 2, lid; 3, return spring; 4, guide core; 41, magnet mounting block; 42, magnet mounting groove; 43, reinforcing strip; 5, cover plate; 51, first through hole; 52, second through hole; 53, third through hole; 6, switch circuit board; 7, Hall element; 8, conduction terminal; 81, first terminal; 82, second terminal; 83, third terminal; 831, third cylinder; 832, sphere; 9, magnet; 10, light guide column. Specific embodiments

[0027] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined purpose, the following details the specific embodiments of the present utility model in conjunction with the accompanying drawings and preferred embodiments.

[0028] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0029] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.

[0030] In the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] Please refer to Figures 1 to 7, an embodiment of the present utility model provides a Hall sensor magnetic axis switch, which includes a base 1 detachably installed on a keyboard circuit board, a lid 2 covering the base 1, a return spring 3 sleeved in the middle of the base 1, a guide core 4 with its upper end passing through the lid 2 and its lower end pressing against the return spring 3. It further includes a cover plate 5 arranged at the lower end of the base 1, a switch circuit board 6 arranged on the cover plate 5, a Hall element 7 arranged on the cover plate 5 and electrically connected to the switch circuit board 6, at least two sets of conduction terminals 8 electrically connected to the switch circuit board 6 and extending downward integrally to conduct with the keyboard circuit board, and a magnet 9 arranged on the guide core 4 and facing the Hall element 7.

[0032] By adopting the method of using the Hall element 7 to sense the magnet 9, it effectively avoids the physical wear caused by the contact between the traditional moving piece and static piece, prolongs the service life and feel of the key switch. And the Hall element 7 has a fast response speed, can detect the change of the key state in real time, and also has good anti-interference ability, effectively ensuring the normal operation of the keyboard. And the Hall element 7 is exactly below the magnet 9, enabling the Hall element 7 to better sense the magnet 9, improving the corresponding accuracy and response speed of this switch. By arranging the Hall element 7 inside the switch body and the conduction terminals 8 corresponding to be freely plugged and unplugged on the keyboard circuit board, the entire switch body can be freely plugged and unplugged on the keyboard circuit board, which is conducive to replacing the switch body for maintenance and other operations, and can be freely replaced with other key switches, improving the adaptability of the keyboard, avoiding the situation that other key switches cannot be replaced due to the Hall element 7 being arranged on the keyboard circuit board, facilitating people's use, meeting people's needs for different key switches, and ensuring people's use experience. For the specific structure and operation mode of the Hall element 7, the Hall element 7 is a conventional component in the field, and its specific structure and operation mode are publicly available prior art, so it will not be elaborated in this embodiment.

[0033] When the user presses the guide core 4, the guide core 4 drives the magnet 9 arranged inside it to move downward, and the return spring 3 sleeved at the lower end of the guide core 4 is compressed and deformed. The magnet 9 approaches the Hall element 7, generating a Hall voltage proportional to the magnetic field strength. This Hall voltage is then converted into an electrical signal and transmitted to the switch circuit board 6 electrically connected to the Hall element 7. The signal on the switch circuit board 6 is transmitted to the keyboard circuit board through the conduction terminals 8 to realize operations such as typing. When the user releases the guide core 4, the guide core 4 drives the magnet 9 to move upward and reset under the elastic restoring force of the return spring 3 itself. The magnet 9 moves away from the Hall element 7, and the Hall element 7 stops outputting a signal after sensing the distance of the magnet 9.

[0034] For the specific electrical connection method between this switch and the keyboard circuit board, such as Figure 1 , Figures 3 to 5 andFigure 7 As shown, the conducting terminal 8 is composed of three groups, including a first terminal 81 fixedly disposed on the cover plate 5 and electrically connected to the switch circuit board 6, a second terminal 82 fixedly disposed on the cover plate 5 and electrically connected to the switch circuit board 6, and a third terminal 83 fixedly disposed on the cover plate 5 and electrically connected to the switch circuit board 6.

[0035] The first terminal 81 and the second terminal 82 are terminals fixed on the cover plate 5 and extending downward. The specific structure is consistent with the structure in the existing key switch, which is a well-known prior art, so it is not repeated in this embodiment. The first terminal 81, the second terminal 82, and the third terminal 83 are respectively connected through the three pins of the switch circuit board 6 and the Hall element 7 to realize signal transmission. By setting the third group of terminals as telescopic terminals, the structure of the telescopic terminals enables the third terminal 83 to adjust its own height according to the height of the first terminal 81 and the second terminal 82 inserted into the keyboard circuit board when pressed against the keyboard circuit board, and can achieve conduction between itself and the keyboard circuit board when it contacts, thereby achieving normal conduction between the Hall element 7 and the keyboard circuit board, and transmitting signals to the keyboard circuit board to realize typing and other operations. The freely retractable structure of the third terminal 83 eliminates the problem of the keyboard circuit board not matching other key switches by not having to set an additional conduction interface on the keyboard circuit board for the third terminal 83 to be inserted, thereby improving the adaptability of the keyboard, facilitating people's use, meeting people's needs for different key switches, and ensuring people's use experience.

[0036] Regarding the specific structural arrangement of the third terminal 83, as shown in FIG. Figure 3 As shown, the third terminal 83 includes a third column 831 disposed on the cover plate 5 and extending downward, and a sphere 832 movably disposed at the lower end of the third column 831 .

[0037] When the switch is to be installed on the keyboard circuit board, the first terminal 81 and the second terminal 82 pass through the keyboard circuit board and gradually press down, the ball 832 in the third terminal 83 contacts and conducts with the keyboard circuit board, and as the first terminal 81 and the second terminal 82 continue to press down, the ball 832 moves up and down in the third column 831, thereby adjusting its own height, which is conducive to the mutual cooperation with the first terminal 81 and the second terminal 82. The ball 832 only needs to contact the keyboard circuit board to achieve conduction with the keyboard circuit board, and there is no need to set an additional conduction structure on the keyboard circuit board for the third terminal 83 to penetrate and insert, which saves time and effort.

[0038] The sphere 832 in the third terminal 83 can also be fixed to the lower end of the third cylinder 831. The total height of the third cylinder 831 and the sphere 832 is the height when the first terminal 81 and the second terminal 82 are fully installed on the keyboard circuit board, thereby achieving the height uniformity of the three groups of conducting terminals 8 and the normal conduction of the three groups of conducting terminals 8 with the keyboard circuit board respectively.

[0039] The third terminal 83 can also be a telescopic terminal, including a third outer terminal fixedly arranged on the cover plate 5, a third elastic member arranged in the third outer terminal, and a third inner terminal with its top embedded in the third outer terminal and pressing against the third elastic member and extending downward. When the switch needs to be installed on the keyboard circuit board, the third inner terminal in the telescopic terminal first contacts the keyboard circuit board and presses against the conduction interface of the keyboard circuit board, thereby realizing the conduction of the telescopic terminal. The first terminal 81 and the second terminal 82 continue to be pressed downward and extend into the keyboard circuit board. At the same time, the third inner terminal squeezes the third elastic member inward, causing the third elastic member to be compressed and deformed, thereby achieving the purpose of adjusting the height of the third terminal. When the switch needs to be replaced, the switch can be directly pulled out from the keyboard circuit board. The first terminal 81 and the second terminal 82 are separated from the keyboard circuit board, and the third inner terminal is separated from the state of pressing against the keyboard circuit board. The third inner terminal extends outward and resets under the elastic restoring force of the third elastic member, thus facilitating the next use.

[0040] The third terminal 83 can also be a fixed conducting terminal 8 and other structures the same as the first terminal 81 and the second terminal 82, and its specific structure can be set according to the actual situation.

[0041] Preferably, for the specific way of conduction between the switch and the keyboard circuit board, three groups of conduction interfaces matching the conducting terminals 8 respectively are provided on the keyboard circuit board. Two of them are through-type conduction interfaces for the first terminal 81 and the second terminal 82 to be inserted to achieve power supply and signal transmission. The remaining group is a point-contact type conduction interface. The third terminal 83 can be connected and conducted by contacting the point-contact type conduction contact. There is no need to additionally set a conduction interface for the third terminal 83 to be inserted, which may cause the problem that the keyboard circuit board does not match other key switches, improving the adaptability of the keyboard, facilitating people's use, meeting people's needs for different key switches, and ensuring people's use experience.

[0042] The conduction interface of the remaining group can also be a through-type conduction interface. The third terminal 83 can be conducted with the keyboard circuit board through this conduction interface. When other key switches need to be replaced, the first terminal and the second terminal of other key switches can be correspondingly inserted into the group conduction interface, and the redundant conduction interfaces can be left unused, so that the keyboard can be matched with the present switch body and other key switches, improving the adaptability of the keyboard, facilitating people's use, meeting people's needs for different key switches, and ensuring people's use experience.

[0043] Regarding the specific manner in which the conduction terminal 8 penetrates through the cover plate 5 to be electrically connected to the keyboard circuit board, as Figure 3 shown, a first through hole 51 for the upper end of the first terminal 81 to penetrate through is formed on the cover plate 5. The upper end of the first terminal 81 penetrates through the first through hole 51 to be connected to the switch circuit board 6 on the cover plate 5. A second through hole 52 for the upper end of the second terminal 82 to penetrate through is formed on the cover plate 5. The upper end of the second terminal 82 penetrates through the second through hole 52 to be connected to the switch circuit board 6 on the cover plate 5. A third through hole 53 for the upper end of the third terminal 83 to penetrate through is formed on the cover plate 5. The upper end of the third terminal 83 penetrates through the third through hole 53 to be connected to the switch circuit board 6 on the cover plate 5. The three cooperate with each other to achieve the purpose of the conduction terminal 8 penetrating through the cover plate 5 to be electrically connected to the keyboard circuit board.

[0044] Regarding the specific manner in which the magnet 9 is driven by the guide core 4, as Figure 6 shown, a magnet mounting block 41 protruding outward is formed on the outer side wall of the guide core 4. A magnet mounting groove 42 for the magnet 9 to be embedded is formed at the lower end of the magnet mounting block 41. The magnet 9 is correspondingly embedded in the magnet mounting groove 42 to fix itself on the guide core 4, facilitating the guide core 4 to drive the magnet to move up and down between the cover 2 and the base. And there is no foreign object blocking between the Hall element 7 and the magnet 9, and they are in the same vertical radial channel, effectively improving the detection efficiency of the Hall element 7 for detecting the magnet 9, and improving the response speed and induction accuracy of the present switch.

[0045] In order to make the installation of the magnet 9 more firm, as Figure 6 shown, at least one reinforcing strip 43 protruding inward is formed on the inner wall of the magnet mounting groove 42. The outer side of the magnet 9 presses against the reinforcing strip 43 to squeeze the reinforcing strip 43, so that the magnet 9 and the magnet mounting groove 42 are more compact, and further the installation of the magnet 9 is more firm, preventing the problem that the magnet 9 is displaced and falls off during the process of being driven by the guide core 4.

[0046] Preferably, as Figure 6As shown, the number of the reinforcing strips 43 is four groups, which are evenly arranged in a ring on the inner wall of the magnet mounting groove 42 in sequence, so that the extrusion force on the magnet 9 by the reinforcing strips 43 is uniform, making the installation of the magnet 9 more firm and conducive to ensuring the normal operation of this switch.

[0047] For other structures of this switch, such as Figure 3 As shown, the switch body further includes a light guide column 10 disposed between the base 1 and the cover 2 and on one side of the magnet 9 and the Hall element 7. The light guide column 10 is a slender lens with a transparent or semi-transparent structure, and its main function is to guide the light from the LED light source to the keycap to achieve a backlight effect, thereby improving the ornamental and entertaining properties of this switch.

[0048] It should be noted here that the Hall sensor magnetic axis switch disclosed in the present invention is an improvement on the specific structure, and the specific control method is not the innovation point of the present invention. For the springs, magnets, Hall elements and other components involved in the present invention, they can be common standard parts or parts known to those skilled in the art, and their structures, principles and control methods are all known to those skilled in the art through technical manuals or obtained through conventional experimental methods.

[0049] The above are only the preferred embodiments of the present invention, and do not impose any limitation on the technical scope of the present invention. Therefore, other structures obtained by adopting the same or similar technical features as those of the above embodiments of the present invention are all within the protection scope of the present invention.

Claims

1. A Hall sensor magnetic axis switch, comprising a base detachably mounted on a keyboard circuit board, a cover covering the base, a return spring sleeved on the middle of the base, and a guide core with an upper end passing through the cover and a lower end pressed against the return spring, characterized in that: It also includes a cover plate arranged at the lower end of the base, a switch circuit board arranged on the cover plate, a Hall element arranged on the cover plate and electrically connected to the switch circuit board, at least two groups of conduction terminals electrically connected to the switch circuit board and extending downward as a whole to conduct with the keyboard circuit board, and a magnet arranged on the guide core and facing the Hall element.

2. The Hall sensor magnetic axis switch according to claim 1, characterized in that: The conducting terminals are in three groups, including a first terminal fixed on the cover plate and electrically connected to the switch circuit board, a second terminal fixed on the cover plate and electrically connected to the switch circuit board, and a third terminal fixed on the cover plate and electrically connected to the switch circuit board.

3. The Hall sensor magnetic axis switch according to claim 2, characterized in that: The third terminal includes a third column disposed on the cover plate and extending downward, and a sphere disposed at the lower end of the third column.

4. The Hall sensor magnetic axis switch according to claim 2, characterized in that: The cover plate is formed with a first through hole for the upper end of the first terminal to pass through, the cover plate is formed with a second through hole for the upper end of the second terminal to pass through, and the cover plate is formed with a third through hole for the upper end of the third terminal to pass through.

5. The Hall sensor magnetic axis switch according to claim 1, characterized in that: A magnet mounting block protruding outward is formed on the outer side wall of the guide core, and a magnet mounting groove for embedding the magnet is formed at the lower end of the magnet mounting block.

6. The Hall sensor magnetic axis switch according to claim 5, characterized in that: At least one reinforcing strip protruding inwardly is formed on the inner wall of the magnet installation groove.

7. The Hall sensor magnetic axis switch according to claim 6, characterized in that: The number of the reinforcement strips is 4 groups, which are evenly arranged on the inner wall of the magnet installation groove in sequence.

8. The Hall sensor magnetic axis switch according to claim 1, characterized in that: It also includes a light guide column which is arranged between the base and the cover and located on one side of the magnet and the Hall element.

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