A type of balance frame magnetic shaft push button switch

Abstract

This utility model relates to a Hall effect sensor-type magnetic shaft push-button switch. It includes a plastic housing with a key shaft hole, and a key shaft cavity extending inward from the key shaft hole. It also includes a plastic key shaft body located within the key shaft cavity. A hinged balance frame is provided between the key shaft body and the bottom of the key shaft cavity. A cylindrical magnetic chamber, integral with the key shaft body, extends downward from the key shaft body. A magnet is fixed within the magnetic chamber, and the magnet protrudes from the opening of the cylindrical magnetic chamber to contact the bottom of the key shaft cavity. Through the ingenious design of the key shaft body and its cooperation with circuit board components, the axial magnet senses the corresponding Hall effect element of the PCBA. This results in fewer components, simple assembly, high efficiency, and low cost. Furthermore, it achieves a linear tactile feel, and the key shaft bottoms out with a crisp, clear sound for pleasant feedback.

Description

Technical Field

[0001] This utility model relates to the field of key technology for data input in electronic devices, particularly key switches used in computer input device keyboards, and especially a Hall effect sensing magnetic shaft key switch. Background Technology

[0002] Conventional Hall effect sensor push-button switches are gaining increasing attention due to their advantages such as high stability, long service life, and high security. For example, the existing technology with patent number ZL202120368822.0, entitled "A Magnetic Scissor-Mount Push-Button Switch," by aligning the two magnetic blocks with the axis of their magnetic poles perpendicular to the direction of keyway movement, creates a shearing magnetic force when pressed. This provides tactile feedback to the finger during sudden changes in pressure, effectively combining magnetic force reset and tactile feedback. It features a grating on the scissor holder, a photodiode on the base plate, and an LED with an integrated Hall effect switch chip at the bottom of the light guide. This design results in numerous components, complex assembly, stringent requirements on the pressing stroke of the shaft, cumbersome and labor-intensive assembly, low efficiency, and high cost. Utility Model Content

[0003] The purpose of this utility model is to provide a balanced frame magnetic shaft push button switch, which achieves the sensing of the Hall element corresponding to the PCBA by the ingenious design of the key shaft body and the cooperation with the circuit board components. It has fewer components, simple assembly, high efficiency and low cost; moreover, it can achieve linear tactile feel and emit a crisp sound when the shaft bottoms out to achieve pleasant feedback.

[0004] The present invention provides a balanced frame magnetic shaft push-button switch, comprising a plastic housing 1 composed of an upper housing 11 and a lower housing 12. The upper housing 11 has a key shaft hole 111, and a key shaft cavity 1112 extends inward from the key shaft hole 111, the key shaft cavity 1112 being located within the upper housing 11 and the lower housing 12. It also includes a plastic key shaft body 2 located within the key shaft cavity 1112. The top of the key shaft body 2 is provided with a pressing part 21, which extends out of the key shaft hole 111. The shaft portion 22 of the key shaft body 2 is located within the key shaft. The cavity 1112 is movable up and down; a hinged balance frame 3 is provided between the bottom 2D of the key shaft body 2 and the bottom 1112D of the key shaft cavity 1112; a return spring 4 is provided in the middle of the hinged balance frame 3, and the return spring 4 is located between the bottom 2D of the key shaft body 2 and the bottom 1112D of the key shaft cavity 1112; the bottom 2D of the key shaft body 2 extends downward from the key shaft body 2 and is provided with a cylindrical magnetic chamber 23 integral with the key shaft body 2, the opening of the cylindrical magnetic chamber 23 faces downward, and a magnet 5 is provided in the cylindrical magnetic chamber 23.

[0005] In the aforementioned balanced frame magnetic shaft push-button switch, the magnet 5 extends out of the cylindrical magnetic chamber 23 and can contact the bottom 1112D of the key shaft cavity 1112.

[0006] In the aforementioned balanced frame magnetic shaft push-button switch, the cylindrical magnetic cavity 23 has its cylindrical central axis overlapping with the central axis of the key shaft body 2.

[0007] In the aforementioned type of balance frame magnetic shaft push button switch, a spring arm 24 extends laterally and downward from the bottom 2D of the key shaft body 2, and the spring arm 24 and the bottom 2D of the key shaft body 2 form a support anchor point 241 for the hinged balance frame 3; a slide rail 1113 is provided on the side wall 1112C of the key shaft cavity 1112; the end of the spring arm 24 can slide within the slide rail 1113.

[0008] Compared with the prior art, the advantages of this utility model are that through the ingenious design of the key shaft and its cooperation with the circuit board components, the shaft magnet can sense the Hall element corresponding to the PCBA. It has fewer components, simpler assembly, higher efficiency, and lower cost. Moreover, it can achieve a linear feel, and the shaft magnet emits a crisp sound when it touches the bottom, providing a pleasant feedback. Attached Figure Description

[0009] Figure 1 This utility model relates to a three-dimensional magnetic shaft push-button switch with a balanced frame. Figure 1 .

[0010] Figure 2 This utility model relates to a three-dimensional magnetic shaft push-button switch with a balanced frame. Figure 2 .

[0011] Figure 3 This utility model discloses a balanced frame magnetic shaft push button switch component and its positional relationship. Figure 1 .

[0012] Figure 4 This utility model discloses a balanced frame magnetic shaft push button switch component and its positional relationship. Figure 2 .

[0013] Figure 5 This is a front view of the cylindrical magnetic chamber and magnet of a balance frame magnetic shaft push button switch according to this utility model. Detailed Implementation

[0014] The present invention will now be described in further detail with reference to the embodiments and accompanying drawings.

[0015] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", 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.

[0016] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 The diagram shows an embodiment of a magnetic shaft push-button switch with a balance frame according to this utility model. It includes a plastic housing 1 composed of an upper housing 11 and a lower housing 12. The upper housing 11 has a key shaft hole 111, and a key shaft cavity 1112 extends inward from the key shaft hole 111, located within the upper housing 11 and the lower housing 12. It also includes a plastic key shaft body 2 located within the key shaft cavity 1112. The top of the key shaft body 2 has a pressing part 21 extending out of the key shaft hole 111. A hinged balance frame 3 is provided between the bottom 1112D of the key shaft body cavity. A return spring 4 is provided in the middle of the hinged balance frame 3. The return spring 4 is located at the bottom 2D of the key shaft body 2 and the shaft part 22 of the key shaft cavity 2, and can move up and down within the key shaft cavity 1112. It is located between the bottom of the key shaft body 2 and the bottom 1112D of the key shaft cavity 1112. A cylindrical magnetic cavity 23, integral with the key shaft body 2, extends downward from the bottom 2D of the key shaft body 2. The opening of the cylindrical magnetic cavity 23 faces downward, and a magnet 5 is provided inside the cylindrical magnetic cavity 23. The magnet 5 extends out of the opening of the cylindrical magnetic cavity 23 and can contact the bottom 1112D of the key shaft cavity 1112. The cylindrical central axis of the cylindrical magnetic cavity 23 overlaps with the central axis of the key shaft body 2, that is, the cylindrical central axis of the cylindrical magnetic cavity 23 is the central axis of the key shaft body 2. A spring arm 24 extends laterally and downward from the bottom 2D of the key shaft body 2. The spring arm 24 and the bottom 2D of the key shaft body 2 form a support anchor point 241 for the hinged balance frame 3. This support anchor point 241 can accommodate the first frame leg 311 of the first frame 31 of the hinged balance frame 3. Similarly, the bottom 2D of the key shaft body 2 also provides a support anchor point for the second frame leg 321 of the second frame 32 of the hinged balance frame 3. A slide rail 1113 is provided on the side wall 1112C of the key shaft cavity 1112. The end of the spring arm 24 can slide within the slide rail 1113, thus ensuring smooth operation when the key shaft body 2 moves up and down.

[0017] In use, pressing the pressing part 21 causes the key shaft 2 to move downwards, and the magnet 3 moves downwards with the key shaft 2. At this time, the elastic arm 24 slides within the slide rail 1113, making the entire key shaft 2 move downwards smoothly. When the cylindrical magnetic cavity 23 of the key shaft 2 reaches the bottom 2D of the housing 1, the magnet 5 extends out of the cylindrical magnetic cavity 23 and touches the bottom 2D of the housing 1. The metal touching the plastic housing produces a crisp sound, and at the same time, the sensing element on the circuit board where the key is located senses the magnetic force and outputs a signal. When the pressing force of the pressing part 21 is released, the return spring causes the key shaft 2 to move upwards, and the magnetic force sensed by the sensing element on the circuit board becomes smaller and smaller until it is almost undetectable. This process realizes the switching function.

[0018] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present utility model, and these all fall within the protection scope of the present utility model.

Claims

1. A balanced frame magnetic shaft push-button switch, comprising: The plastic housing (1) is composed of an upper housing (11) and a lower housing (12). The upper housing (11) has a key shaft hole (111), and a key shaft cavity (1112) extends inward from the key shaft hole (111) and is located inside the upper housing (11) and the lower housing (12). A plastic key shaft body (2) is located in the key shaft cavity (1112). The top of the key shaft body (2) is provided with a pressing part (21), which extends out of the key shaft hole (111). The shaft part (22) of the key shaft body (2) is located in the key shaft cavity (1112) and can move up and down. A hinged balance frame (3) is provided between the bottom of the key shaft body (2) and the bottom (1112D) of the key shaft cavity (1112); A return spring (4) is provided in the middle of the hinged balance frame (3). The return spring (4) is located between the bottom (2D) of the key shaft body (2) and the bottom (1112D) of the key shaft cavity (1112). Its features The bottom (2D) of the key shaft body (2) extends downward from the key shaft body (2) and is provided with a cylindrical magnetic chamber (23) integral with the key shaft body (2). The opening of the cylindrical magnetic chamber (23) faces downward, and a magnet (5) is provided inside the cylindrical magnetic chamber (23).

2. The balanced frame magnetic shaft push-button switch according to claim 1, characterized in that... The magnet (5) extends out of the cylindrical magnetic compartment (23) and can contact the bottom (1112D) of the key shaft cavity (1112).

3. A balanced frame magnetic shaft push-button switch according to claim 1 or 2, characterized in that... The cylindrical magnetic chamber (23) has its cylindrical central axis overlapping with the central axis of the key shaft body (2).

4. A balanced frame magnetic shaft push-button switch according to claim 3, characterized in that... A spring arm (24) extends laterally and downward from the bottom (2D) of the key shaft body (2), and a support anchor point (241) of a hinged balance frame (3) is formed between the spring arm (24) and the bottom (2D) of the key shaft body (2); a slide (1113) is provided on the side wall (1112C) of the key shaft cavity (1112); the end of the spring arm (24) can slide in the slide (1113).

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