Inductance type shaft body structure

Abstract

The utility model discloses an inductance type shaft body structure which comprises a base, an upper cover covering the base, a guide core arranged in the base and the upper cover and extending upwards to penetrate out of the upper cover, and a reset spring with the upper end abutting against the guide core and the lower end abutting against the base. The aluminum induction core is arranged at the lower end of the guide core and is integrally conical; and a through channel through which the aluminum induction core penetrates downwards is formed on the base. According to the inductance type shaft body structure, linear conduction of the shaft body is effectively guaranteed, direct contact is not needed, abrasion is reduced, conduction is accurate, fine grading can be achieved, the use requirement for multi-stage signal output is met, and the inductance type shaft body structure can be suitable for keyboards of different types and is wide in application range.

Description

Technical Field

[0001] The utility model relates to the technical field of key switches, in particular to an inductive shaft structure. Background Art

[0002] Many common pushbutton switches on the market today use mechanical structures. When pressed by an external force, the moving and stationary plates contact, causing a short circuit and sending a signal to achieve the corresponding operation. The disadvantage of this combined contact structure of moving and stationary plates is material wear, especially the contact surface of the moving and stationary plates. As a result, as the pushbutton switch is used for a long time, problems such as accidental touches or non-touchability will occur more frequently, which is not conducive to daily use.

[0003] Another drawback of this mechanical push switch is that it only provides one switching point per actuation. In other words, each actuation at a certain point triggers exactly one signal. Therefore, it cannot achieve variable signals in a step-by-step, finely graded, or even stepless manner, failing to meet user needs for multi-level signal output. Utility Model Content

[0004] In response to the above-mentioned shortcomings, the purpose of the present invention is to provide an inductive shaft structure, which effectively ensures the linear conduction of the shaft, does not require direct contact, reduces wear, has accurate conduction, can achieve fine grading, thereby meeting the use requirements of multi-level signal output, and can be applied to different types of keyboards, with a wide range of applications.

[0005] The technical solution adopted by the present invention to achieve the above-mentioned purpose is:

[0006] An inductive shaft structure includes a base, an upper cover covering the base, a guide core arranged within the base and the upper cover and extending upward through the upper cover, and a return spring with its upper end pressed against the guide core and its lower end pressed against the base. The structure also includes an aluminum inductive core arranged at the lower end of the guide core and having an overall conical shape. The base is formed with a through channel for the aluminum inductive core to pass downward.

[0007] As a further improvement of the present invention, the aluminum induction core includes an embedding portion embedded in the lower end of the guide core, and an induction portion that is tapered as a whole.

[0008] As a further improvement of the present invention, the sensing portion includes a first sensing column connected to the embedded portion and having an overall cylindrical shape, a second sensing column integrally formed at the lower end of the first sensing column and having an overall truncated cone shape, and a third sensing column integrally formed at the lower end of the second sensing column and having an overall cylindrical shape.

[0009] As a further improvement of the present invention, 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 the present invention, the embedding portion is cylindrical as a whole, and a first embedding guide inclined surface is formed on the upper end of the embedding portion and extends obliquely from the outer lower part to the inner upper part.

[0011] As a further improvement of the present invention, a guide column is formed at the lower end of the guide core, the upper end of the return spring is sleeved on the outside of the guide column, and the lower end of the guide column is formed with an installation groove extending inward and upward for the guide core to be embedded.

[0012] As a further improvement of the present invention, a mounting pressing flange is formed inside the mounting groove and protrudes inward and 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 pressing flange.

[0013] As a further improvement of the present invention, a second embedding guide inclined surface is formed on the inner side of the lower end of the installation groove and extends obliquely from the outer lower side to the inner upper side.

[0014] The beneficial effects of the utility model are:

[0015] The shaft structure is configured to include a base, an upper cover covering the base, a conductive core disposed within the base and upper cover and extending upward through the upper cover, and a return spring with its upper end pressing against the conductive core and its lower end pressing against the base. Furthermore, the shaft structure includes a conical aluminum inductive core disposed at the lower end of the conductive core. The base is provided with a through-channel for the aluminum inductive core to pass downward. The conductive core, aluminum inductive core, and through-channel are located on the same radial vertical line, thereby ensuring accurate conduction. The shaft structure is mounted on a machine such as a keyboard. A coil is disposed on the circuit board of such a machine. When current passes through the coil, a certain electromagnetic field is generated. When an external force presses on the conductive core, the conductive core drives the aluminum inductive core downward. The aluminum inductive core moves downward through the through-channel and approaches the coil, inducing the wire within the electromagnetic field, thereby transmitting a signal outward. By configuring the aluminum induction core into a conical shape, the closer it is to the coil, the stronger the induction effect, thus ensuring linear conduction without direct contact, reducing wear, and improving conduction accuracy. Different strokes can correspond to different operating signals, thus achieving fine grading and meeting the requirements of multi-level signal output. Furthermore, different signals can be set according to different strokes, making it suitable for different types of keyboards. For example, when used on ultra-thin keyboards, the pressing stroke can be set to 1-2mm, and the shaft conducts within this range. When used on ordinary mechanical keyboards, the pressing stroke can be set to 1-4mm, and the shaft conducts within this range. This allows it to achieve conduction even with keyboards of different heights, providing a wide range of applications and improving the practicality of the shaft structure.

[0016] The above is an overview of the technical solution of the utility model. The utility model will be further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an overall schematic diagram of the utility model;

[0018] Figure 2 It is a structural diagram of the aluminum induction core;

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

[0020] Figure 4 This is another exploded view of the present invention;

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

[0022] Figure 6 This is an overall schematic diagram of the utility model on the circuit board coil;

[0023] In the figure: 1. Base; 11. Through-channel; 2. Upper cover; 3. Guide core; 31. Guide column; 311. Mounting groove; 3111. Mounting pressure flange; 3112. Second embedded guide slope; 4. Return spring; 5. Aluminum sensing core; 51. Embedding portion; 511. First embedded guide slope; 52. Sensing portion; 521. First sensing column; 522. Second sensing column; 523. Third sensing column. DETAILED DESCRIPTION

[0024] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings and preferred embodiments.

[0025] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0027] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0028] Please refer to Figures 1 to 6The present invention provides an inductive shaft structure, comprising 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 return spring 4 whose upper end presses against the guide core 3 and whose lower end presses against the base 1. The structure also includes an aluminum inductive core 5 disposed at the lower end of the guide core 3 and having an overall conical shape. The base 1 is formed with a through channel 11 for the aluminum inductive core 5 to pass downward.

[0029] The guide core 3, aluminum inductive core 5, and through-channel 11 are aligned on the same radial vertical line, ensuring precise conduction. This shaft structure is installed on a machine such as a keyboard. A coil is installed on the circuit board of such a machine. When current passes through the coil, a certain electromagnetic field is generated. When an external force presses on the guide core 3, the guide core 3 drives the aluminum inductive core 5 downward. The aluminum inductive core 5 moves downward through the through-channel 11 and approaches the coil, inducing the wire within the electromagnetic field, thereby transmitting a signal. By designing the aluminum inductive core 5 in a tapered shape, the closer it is to the coil, the stronger the induction effect. This ensures linear conduction, eliminates the need for direct contact, reduces wear, improves conduction precision, and allows different strokes to correspond to different operating signals, thus achieving fine grading and meeting the requirements of multi-level signal output. Different signals are set according to different strokes, making it applicable to different types of keyboards. For example, when used on an ultra-thin keyboard, it can be set to a pressing stroke of 1-2mm, and the shaft body is conductive within this range. When used on an ordinary mechanical keyboard, its pressing stroke can be set to 1-4mm, and the shaft body is conductive within this range, so that it can correspond to keyboards of different heights and can also achieve conductivity. It has a wide range of applications and is conducive to improving the practicality of this shaft structure. By setting the induction core to aluminum, it effectively avoids the problem that the induction core made of materials such as iron products and magnets will demagnetize over time, which will lead to unstable coil induction. It effectively ensures the accuracy of the induction output signal of the shaft structure, giving users a better user experience. The induction principle of the coil, the setting of the circuit board on the keyboard, and the connection method between the circuit board and the coil are all conventional technical means in this field, so they are not described in detail in this embodiment. The coil can be a flat coil, a conical coil set to further improve the grading effect, or a truncated cone winding coil. It can be decided according to the actual situation, so no specific restrictions are made in this embodiment.

[0030] Regarding the specific structural setting of the aluminum induction core 5, as shown in FIG. Figures 2 to 4As shown, the aluminum induction core 5 includes an embedded portion 51 embedded in the lower end of the guide core 3 and an overall tapered induction portion 52. The embedded portion 51 is embedded in the lower end of the guide core 3 to secure the aluminum induction core 5, allowing the guide core 3 to stably drive the aluminum induction core 5 in a linear motion, ensuring the conduction of the shaft structure. The induction portion 52 passes through the through-channel 11 and approaches the coil, inducing the wire within the electromagnetic field, thereby transmitting a signal to the outside and achieving the corresponding operation.

[0031] Regarding the specific structural setting of the sensing part 52, as shown in FIG. Figures 2 to 4 as well as Figure 6 As shown, the sensing portion 52 includes a first sensing column 521 connected to the embedded portion 51 and having an overall cylindrical shape; a second sensing column 522 integrally formed at the lower end of the first sensing column 521 and having an overall truncated cone shape; and a third sensing column 523 integrally formed at the lower end of the second sensing column 522 and having an overall cylindrical shape. The cylindrical structure of the first sensing column 521 facilitates better connection with the embedded portion 51. The overall truncated cone structure of the second sensing column 522 achieves a gradual change in sensing intensity. The closer it is to the coil, the stronger the sensing effect. This ensures linear conduction and improves conduction accuracy. Different strokes can correspond to different operating signals, thus achieving fine grading and meeting the requirements of multi-level signal output. The third sensing column 523 is cylindrical with a uniform diameter, allowing the external coil to first stably sense the third sensing column 523, ensuring stable conduction. The specific method of grading the operating signal of the aluminum sensor core 5 can be achieved by using different strokes, or directly using the structure of the first sensor column 521, the second sensor column 522, and the third sensor column 523, or other grading methods. It can be determined and adjusted according to actual conditions, so no specific limitation is made in this embodiment.

[0032] Preferably, Figures 2 to 4 As shown, the diameter of the first sensing column 521 is equal to the diameter of the upper end of the second sensing column 522, and the diameter of the third sensing column 523 is equal to the diameter of the lower end of the second sensing column 522, thereby ensuring the integrated connection of the sensing part 52 and ensuring the normal operation of the aluminum sensing core 5.

[0033] Preferably, Figures 2 to 4As shown, in order to enable the embedding portion 51 to be better and more accurately embedded in the guide core 3, the embedding portion 51 is cylindrical as a whole, and a first embedding guide inclined surface 511 is formed on the upper end of the embedding portion 51 and extends obliquely from the outer lower portion to the inner upper portion. When the aluminum induction core 5 needs to be installed on the guide core 3, the first embedding guide inclined surface 511 on the embedding portion 51 first contacts the lower end surface of the guide core 3. Under the inclined guiding action of the first embedding guide inclined surface 511, the embedding portion 51 is embedded into the middle part of the lower end of the guide core 3, so that the embedding portion 51 is better and more accurately embedded in the guide core 3, thereby improving the installation efficiency and installation accuracy of the aluminum induction core 5 and ensuring the conduction of the shaft structure.

[0034] Regarding the specific method of setting the aluminum induction core 5 on the guide core 3, as shown in FIG. Figures 3 to 5 As shown, a guide post 31 is formed at the lower end of the guide core 3, and the upper end of the return spring 4 is sleeved on the outer side of the guide post 31. A mounting groove 311 is formed at the lower end of the guide post 31, extending inward and upward, and for the guide core 3 to be embedded. The first embedding guide slope 511 of the embedding portion 51 first contacts the lower end surface of the mounting groove 311. Under the inclined guidance of the first embedding guide slope 511, the embedding portion 51 enters the mounting groove 311, completing the installation. This improves the efficiency and accuracy of the installation of the aluminum induction core 5 and ensures the conduction of the shaft structure.

[0035] In order to prevent the problem of excessive embedding of the embedding portion 51, as shown in FIG. Figure 5 As shown, the interior of the mounting groove 311 is formed with a mounting pressing flange 3111 protruding inward and matching the embedded portion 51. After the embedded portion 51 is embedded in the mounting groove 311, its upper end is pressed against the lower end surface of the mounting pressing flange 3111, thereby effectively preventing the aluminum induction core 5 from moving while being driven by the guide core 3 and thus being over-embedded, resulting in the coil sensing the aluminum induction core 5 and outputting an operating signal different from the model desired by the user, thereby ensuring the conduction accuracy of the shaft structure.

[0036] In order to further prevent the problem of excessive embedding of the embedding portion 51, as shown in FIG. Figures 3 to 5 As shown, the diameter of the first sensing column 521 is larger than the diameter of the mounting groove 311 , thereby effectively preventing the aluminum sensing core 5 from being overly embedded in the mounting groove 311 during operation.

[0037] Preferably, in order to better and more accurately embed the aluminum induction core 5 into the installation groove 311, as shown in FIG. Figure 5As shown, a second embedding guide slope 3112 is formed on the inner side of the lower end of the mounting groove 311 and extends obliquely from the outer lower side to the inner upper side. When the aluminum induction core 5 is embedded in the mounting groove 311, the first embedding guide slope 511 thereon first contacts the second embedding guide slope 3112. Under the inclined guiding action of the first embedding guide slope 511 and the second embedding guide slope 3112, the embedding portion 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 induction core 5, improving the installation efficiency and installation accuracy of the aluminum induction core 5, and ensuring the conduction of the shaft structure.

[0038] It should be noted that the inductive shaft structure disclosed in this utility model is an improvement to a specific structure, and the specific control method is not the innovation of this utility model. The coil, upper cover, circuit board, keyboard, and other components involved in this utility model can be commonly used standard parts or components known to those skilled in the art. Their structure, principles, and control methods are all known to those skilled in the art through technical manuals or routine experimental methods.

[0039] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, other structures obtained by adopting the same or similar technical features as the above embodiments of the present invention are within the scope of protection of the present invention.

Claims

1. An inductive shaft structure comprising a base, an upper cover covering the base, a guide core disposed within the base and the upper cover and extending upward through the upper cover, and a return spring having an upper end pressed against the guide core and a lower end pressed against the base, characterized in that: It also includes an aluminum induction core that is arranged at the lower end of the guide core and is tapered as a whole. A through channel for the aluminum induction core to pass through downward is formed on the base.

2. The inductive shaft structure according to claim 1, wherein: The aluminum induction core comprises an embedding portion embedded in the lower end of the guide core and an induction portion which is tapered as a whole.

3. The inductive shaft structure according to claim 2, wherein: The sensing portion includes a first sensing column connected to the embedding portion and having an overall cylindrical shape, a second sensing column integrally formed at the lower end of the first sensing column and having an overall truncated cone shape, and a third sensing column integrally formed at the lower end of the second sensing column and having an overall cylindrical shape.

4. The inductive shaft structure according to claim 3, wherein: 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, wherein: The embedding portion is cylindrical in shape as a whole, and a first embedding guide inclined surface is formed on the upper end of the embedding portion and extends obliquely from the outer lower side to the inner upper side.

6. The inductive shaft structure according to claim 2, wherein: A guide column is formed at the lower end of the guide core, the upper end of the return spring is sleeved on the outer side of the guide column, and a mounting groove is formed at the lower end of the guide column, extending inward and upward and for the guide core to be embedded.

7. The inductive shaft structure according to claim 6, wherein: An installation pressing flange protruding inward and matching with the embedding portion is formed inside the installation groove. After the embedding portion is embedded in the installation groove, the upper end of the embedding portion presses against the lower end surface of the installation pressing flange.

8. The inductive shaft structure according to claim 7, wherein: A second embedding guide inclined surface is formed on the inner side of the lower end of the installation groove and extends obliquely from the outer lower side to the inner upper side.

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