Inductive shaft structure

Abstract

An inductive shaft structure, comprising: a base (1); an upper cover (2), which covers the base (1); a guide core (3), which is arranged in the base (1) and the upper cover (2) and extends upwards through and beyond the upper cover (2); a reset spring (4), the upper end of which abuts against the guide core (3), and the lower end of which abuts against the base (1); and an aluminum induction core (5), which is arranged at the lower end of the guide core (3) and is tapered overall, wherein a through channel (11) for allowing the aluminum induction core (5) to pass downwards therethrough is formed in the base (1). The inductive shaft structure effectively ensures the linear electrical connection of a shaft, and operates without requiring direct contact, thereby reducing wear, and realizing accurate electrical connection; fine-grained leveling can be realized, thereby meeting the use requirements for multi-level signal output; and the inductive shaft structure can be applied to different types of keyboards, thereby having a wide application range.

Description

An inductive shaft structure Technical Field

[0001] This utility model relates to the field of push-button switch technology, and in particular to an inductive shaft structure. Background Technology

[0002] Most push-button switches on the market are mechanical. When pressed by external force, the moving contact and the stationary contact contact each other, causing a short circuit and sending a signal to achieve the corresponding operation. The disadvantage of this combination of moving and stationary contact is material wear, especially the contact surfaces of the moving and stationary contacts, which wear down with use. Therefore, as the push-button switch is used for a longer period of time, problems such as accidental activation or failure to activate will occur frequently, which is not conducive to daily use.

[0003] Furthermore, another drawback of this type of mechanical push-button switch is that it only provides one switching point in each actuation. In other words, each actuation at a certain point triggers exactly one signal. Therefore, it cannot implement variable signals in a multi-level, finely graded, or even stepless manner, and cannot meet users' needs for multi-level signal output. Utility Model Content

[0004] To address the aforementioned shortcomings, the purpose of this invention is to provide an inductive switch structure that effectively ensures linear conduction of the switch, eliminates the need for direct contact, reduces wear, ensures accurate conduction, and enables fine-level grading, thereby meeting the needs of multi-level signal output. Furthermore, it is applicable to different types of keyboards and has a wide range of applications.

[0005] The technical solution adopted by this utility model to achieve the above objectives is as follows:

[0006] An inductive shaft structure includes a base, a top cover fitted onto the base, a guide core disposed within the base and the top cover and extending upward through the top cover, and a return spring with its upper end pressing against the guide core and its lower end pressing against the base. It also includes an aluminum sensing core disposed at the lower end of the guide core and being generally conical. A through-channel is formed on the base for the aluminum sensing core to pass downward through.

[0007] As a further improvement of this utility model, the aluminum sensing core includes an embedding part embedded in the lower end of the conductor core and a sensing part that is generally conical.

[0008] As a further improvement of this utility model, the sensing part includes a first sensing post connected to the embedded part and having an overall cylindrical shape, a second sensing post integrally formed at the lower end of the first sensing post and having an overall frustum shape, and a third sensing post integrally formed at the lower end of the second sensing post and having an overall cylindrical shape.

[0009] As a further improvement of this utility model, the diameter of the first sensing column is equal to the diameter of the upper end of the second sensing column, and the diameter of the third sensing column is equal to the diameter of the lower end of the second sensing column.

[0010] As a further improvement of this utility model, the embedding part is cylindrical in shape, and a first embedding guide slope extending obliquely from the lower outside to the upper inside is formed at the upper end of the embedding part.

[0011] As a further improvement of this utility model, a guide post is formed at the lower end of the guide core, the upper end of the reset spring is sleeved on the outside of the guide post, and a mounting groove is formed at the lower end of the guide post that extends inward and upward for the guide core to be embedded in.

[0012] As a further improvement of this utility model, the interior of the mounting groove is formed with an inwardly protruding mounting flange that matches the embedded part. After the embedded part is embedded in the mounting groove, its upper end presses against the lower end surface of the mounting flange.

[0013] As a further improvement of this utility model, a second embedded guide slope extending obliquely from the lower side to the upper side of the mounting groove is formed on the inner side of the lower end.

[0014] The beneficial effects of this utility model are as follows:

[0015] The structure of this switch includes a base, a top cover fitted onto the base, a guide core disposed within the base and top cover and extending upward through the top cover, and a return spring with its upper end pressing against the guide core and its lower end pressing against the base. It also includes an aluminum sensing core disposed at the lower end of the guide core and generally tapered in shape. A through-channel is formed on the base for the aluminum sensing core to pass downward through. The guide core, aluminum sensing core, and through-channel are on the same radial vertical line, thus ensuring accurate conduction. This switch structure is mounted on a keyboard or other mechanical device. The circuit board of the keyboard or similar device contains a coil. When current passes through the coil, a certain electromagnetic field is generated. When an external force presses on the guide core, the guide core moves the aluminum sensing core downward. The aluminum sensing core passes through the through-channel and moves downward, approaching the coil, causing induction in the conductors within the electromagnetic field range, thereby transmitting a signal outward. By setting the aluminum sensing core in a conical shape, the closer it is to the coil, the stronger the sensing effect. This ensures linear conduction, eliminates the need for direct contact, reduces wear, improves conduction accuracy, and allows different travel distances to correspond to different operating signals, thus achieving fine-grained grading and meeting the needs of multi-level signal output. Furthermore, different signals are set according to different travel distances, making it applicable to different types of keyboards. For example, when used on ultra-thin keyboards, it can be set to a travel distance of 1-2mm, within which the switch conducts. When used on ordinary mechanical keyboards, the travel distance can be set to 1-4mm, within which the switch conducts. This allows it to conduct even on keyboards of different heights, resulting in a wide range of applications and improving the practicality of this switch structure.

[0016] The above is an overview of the utility model's technical solution. The following description, in conjunction with the accompanying drawings and specific embodiments, will further illustrate the utility model. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the overall invention.

[0018] Figure 2 is a schematic diagram of the aluminum sensing core;

[0019] Figure 3 is an exploded view of this utility model;

[0020] Figure 4 is another exploded view of this utility model;

[0021] Figure 5 is a schematic diagram of the bottom of the guide core;

[0022] Figure 6 is an overall schematic diagram of the present invention on a circuit board coil;

[0023] In the diagram: 1. Base; 11. Through channel; 2. Top cover; 3. Guide core; 31. Guide post; 311. Mounting groove; 3111. Mounting pressure flange; 3112. Second embedded guide slope; 4. Reset spring; 5. Aluminum sensing core; 51. Embedded part; 511. First embedded guide slope; 52. Sensing part; 521. First sensing post; 522. Second sensing post; 523. Third sensing post.

[0024] Detailed Implementation

[0025] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the specific implementation methods of this utility model will be described in detail below with reference to the accompanying drawings and preferred embodiments.

[0026] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Referring to Figures 1 to 6, this embodiment of the present invention provides an inductive shaft structure, including a base 1, an upper cover 2 covering the base 1, a guide core 3 disposed within the base 1 and the upper cover 2 and extending upward through the upper cover 2, and a reset spring 4 whose upper end abuts against the guide core 3 and whose lower end abuts against the base 1. It also includes an aluminum sensing core 5 disposed at the lower end of the guide core 3 and which is generally conical. A through channel 11 is formed on the base 1 for the aluminum sensing core 5 to pass downward through.

[0030] The guide core 3, aluminum sensing core 5, and through channel 11 are on the same radial vertical line, thus ensuring the accuracy of conduction. This shaft structure is installed on mechanical devices such as keyboards. The circuit board of these devices contains coils. When current passes through the coils, a certain electromagnetic field is generated. When an external force presses on the guide core 3, the guide core 3 drives the aluminum sensing core 5 downwards. The aluminum sensing core 5 passes through the through channel 11 and moves downwards, approaching the coil, causing induction in the conductors within the electromagnetic field range, thereby transmitting signals outwards. By setting the aluminum sensing core 5 in a conical shape, the closer it is to the coil, the stronger the induction effect, thus ensuring linear conduction, eliminating the need for direct contact, reducing wear, improving conduction accuracy, and allowing different strokes to correspond to different operating signals, thereby achieving fine-grained grading and meeting the needs of multi-level signal output. Furthermore, different signals are set according to different travel distances, making it applicable to different types of keyboards. For example, when used on ultra-thin keyboards, the actuation distance can be set to 1-2mm, within which the switch conducts. When used on ordinary mechanical keyboards, the actuation distance can be set to 1-4mm, within which the switch conducts, thus enabling conduction on keyboards of different heights. This wide applicability enhances the practicality of the switch structure. By using aluminum for the sensing core, the demagnetization of sensing cores made of iron or magnets over time is effectively avoided, preventing instability in coil sensing. This ensures the accuracy of the output signal from the switch structure, providing a better user experience. The coil sensing principle, the circuit board on the keyboard, and the connection method between the circuit board and the coil are all conventional techniques in the field, and therefore will not be elaborated upon in this embodiment. The coil can be a flat coil, a conical coil for further improving the grading effect, or a frustum-shaped wound coil, etc., depending on the actual situation. Therefore, no specific limitations are imposed in this embodiment.

[0031] As shown in Figures 2 to 4, the aluminum sensing core 5 includes an embedding part 51 embedded in the lower end of the guide core 3 and a sensing part 52 that is generally conical. The embedding part 51 is embedded in the lower end of the guide core 3 to fix the aluminum sensing core 5, so that the guide core 3 can stably drive the aluminum sensing core 5 to operate linearly, ensuring the conductivity of this shaft structure. The sensing part 52 passes through the through-channel 11 and is close to the coil, causing the wires within the electromagnetic field range to be induced, thereby transmitting signals outward and realizing the corresponding operation.

[0032] As shown in Figures 2 to 4 and Figure 6, the specific structural configuration of the sensing unit 52 includes a first sensing post 521 connected to the embedded part 51 and generally cylindrical; a second sensing post 522 integrally formed at the lower end of the first sensing post 521 and generally frustum-shaped; and a third sensing post 523 integrally formed at the lower end of the second sensing post 522 and generally cylindrical. The cylindrical structure of the first sensing post 521 facilitates better connection with the embedded part 51. The frustum-shaped structure of the second sensing post 522 achieves a gradual change in sensing intensity; the closer it is to the coil, the stronger the sensing effect, thereby ensuring linear conduction, improving the accuracy of conduction, and allowing different operating signals to correspond to different strokes, thus achieving fine grading and meeting the needs of multi-level signal output. The third sensing post 523 is cylindrical with a uniform diameter, allowing the external coil to first stably sense the third sensing post 523, ensuring the stability of conduction. The specific method for classifying the operation signal of the aluminum sensing core 5 can be achieved by using different strokes, or by directly using the structure of the first sensing post 521, the second sensing post 522, and the third sensing post 523, or other classification methods. These methods can be selected and adjusted according to the actual situation, so no specific restrictions are imposed in this embodiment.

[0033] Preferably, as shown in Figures 2 to 4, the diameter of the first sensing post 521 is equal to the diameter of the upper end of the second sensing post 522, and the diameter of the third sensing post 523 is equal to the diameter of the lower end of the second sensing post 522, thereby ensuring the integrated connection of the sensing part 52 and ensuring the normal operation of the aluminum sensing core 5.

[0034] Preferably, as shown in Figures 2 to 4, in order to better and more accurately embed the embedding part 51 into the guide core 3, the embedding part 51 is cylindrical in shape. The upper end of the embedding part 51 has a first embedding guide slope 511 extending obliquely from the lower outer side to the upper inner side. When the aluminum sensing core 5 needs to be installed on the guide core 3, the first embedding guide slope 511 on the embedding part 51 first contacts the lower end face of the guide core 3. Under the oblique guiding action of the first embedding guide slope 511, the embedding part 51 is embedded into the lower middle part of the guide core 3, thereby making the embedding part 51 better and more accurately embedded into the guide core 3, improving the efficiency and accuracy of the installation of the aluminum sensing core 5, and ensuring the conductivity of this shaft structure.

[0035] As shown in Figures 3 to 5, the aluminum sensing core 5 is mounted on the guide core 3 in a specific manner. A guide post 31 is formed at the lower end of the guide core 3. The upper end of the return spring 4 is sleeved on the outside of the guide post 31. A mounting groove 311, extending inward and upward, is formed at the lower end of the guide post 31 for the guide core 3 to be inserted into. The first insertion guide slope 511 of the insertion part 51 first contacts the lower end surface of the mounting groove 311. Under the inclined guiding action of the first insertion guide slope 511, the insertion part 51 enters the mounting groove 311, completing the installation. This improves the efficiency and accuracy of the aluminum sensing core 5 installation and ensures the conductivity of the shaft structure.

[0036] To prevent the embedding part 51 from being over-embedded, as shown in FIG5, an inwardly protruding mounting flange 3111 is formed inside the mounting groove 311 and matches the embedding part 51. After the embedding part 51 is embedded in the mounting groove 311, its upper end presses against the lower end surface of the mounting flange 3111, thereby effectively preventing the aluminum induction core 5 from moving during the process of being driven by the guide core 3 and thus being over-embedded, resulting in the operation signal output by the coil to the aluminum induction core 5 being different from the model that the user wants to output, thus ensuring the conduction accuracy of this shaft structure.

[0037] To further prevent the embedding part 51 from being over-embedded, as shown in Figures 3 to 5, the diameter of the first sensing post 521 is larger than the diameter of the mounting groove 311, thereby effectively preventing the aluminum sensing core 5 from being over-embedded in the mounting groove 311 during operation.

[0038] Preferably, in order to better and more accurately embed the aluminum sensing core 5 into the mounting groove 311, as shown in FIG5, a second embedding guide slope 3112 is formed on the inner side of the lower end of the mounting groove 311, extending obliquely from the lower outer direction to the upper inner direction. When the aluminum sensing core 5 is embedded into the mounting groove 311, the first embedding guide slope 511 on it first contacts the second embedding guide slope 3112. Under the oblique guiding action of the cooperation of the first embedding guide slope 511 and the second embedding guide slope 3112, the embedding part 51 moves toward the middle of the mounting groove 311, thereby better and more accurately embedding into the mounting groove 311, completing the installation of the aluminum sensing core 5, improving the efficiency and accuracy of the installation of the aluminum sensing core 5, and ensuring the conductivity of this shaft structure.

[0039] It should be noted that the inductive shaft structure disclosed in this utility model is an improvement on a specific structure, but the specific control method is not an innovation of this utility model. The coils, top cover, circuit board, keyboard, and other components involved in this utility model can be general standard parts or components known to those skilled in the art. Their structures, principles, and control methods are all known to those skilled in the art through technical manuals or conventional experimental methods.

[0040] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, other structures obtained by using the same or similar technical features as the above embodiments of the present utility model are all within the protection scope of the present utility model.

Claims

1. An inductive shaft structure, comprising a base, an upper cover fitted onto the base, a guide core disposed within the base and the upper cover and extending upward through the upper cover, and a return spring with its upper end pressing against the guide core and its lower end pressing against the base, characterized in that: It also includes an aluminum sensing core disposed at the lower end of the guide core and which is generally conical, and a through channel is formed on the base for the aluminum sensing core to pass through downward.

2. The inductive shaft structure according to claim 1, characterized in that: The aluminum sensing core includes an embedded part embedded in the lower end of the conductor core and a sensing part that is generally conical.

3. The inductive shaft structure according to claim 2, characterized in that: The sensing unit includes a first sensing post connected to the embedded part and having an overall cylindrical shape, a second sensing post integrally formed at the lower end of the first sensing post and having an overall frustum shape, and a third sensing post integrally formed at the lower end of the second sensing post and having an overall cylindrical shape.

4. The inductive shaft structure according to claim 3, characterized in that: The diameter of the first sensing column is equal to the diameter of the upper end of the second sensing column, and the diameter of the third sensing column is equal to the diameter of the lower end of the second sensing column.

5. The inductive shaft structure according to claim 2, characterized in that: The embedding part is cylindrical in shape, and a first embedding guide slope is formed at the upper end of the embedding part, which extends obliquely from the lower outside to the upper inside.

6. The inductive shaft structure according to claim 2, characterized in that: The lower end of the guide core has a guide post, the upper end of the reset spring is sleeved on the outside of the guide post, and the lower end of the guide post has an inward and upward extending mounting groove for the guide core to be inserted.

7. The inductive shaft structure according to claim 7, characterized in that: The interior of the mounting groove has an inwardly protruding mounting flange that matches the embedded part. After the embedded part is inserted into the mounting groove, its upper end presses against the lower end surface of the mounting flange.

8. The inductive shaft structure according to claim 7, characterized in that: A second embedded guide slope is formed on the inner side of the lower end of the mounting groove, extending obliquely from the lower outer side to the upper inner side.

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