Automatic thumb wheel centering mechanism for Hall output device and Hall output device

Abstract

The utility model discloses a Hall output device and a thumb wheel automatic centering mechanism for the Hall output device, which comprises a supporting seat and a thumb wheel rotationally connected to the supporting seat, and an avoiding groove for the swing end of the thumb wheel to swing freely is formed in the supporting seat. A left guide inclined face and a right guide inclined face which are oppositely arranged left and right are formed on the inner wall of the avoiding groove, and an elastic abutting piece is arranged at the swing end of the thumb wheel. The elastic abutting piece is elastically matched with the left guiding inclined face or the right guiding inclined face in an abutting mode to generate reset force enabling the swing end to be automatically centered to the position between the left guiding inclined face and the right guiding inclined face. According to the utility model, through the elastic abutting cooperation of the elastic abutting piece and the left guide inclined surface and the right guide inclined surface on the inner wall of the avoiding groove, the elastic reset force can be automatically generated, so that the thumb wheel is automatically reset to the central position, and the thumb wheel is simple in overall structure, stable in reset force and high in reset precision and repetition precision.

Description

Technical Field

[0001] This utility model relates to the field of Hall output structure technology, specifically to a thumb wheel automatic centering mechanism for a Hall output device and a Hall output device. Background Technology

[0002] The existing Hall output structure, such as the technical solution disclosed in CN222145443U, achieves automatic centering of the thumb wheel (also known as the finger wheel) through the reset action of the torsion spring. However, due to the structural characteristics of the torsion spring, the automatic reset centering performance of the thumb wheel is poor, the repeatability is not good, and it is difficult to return to the center position every time it is reset. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an automatic centering mechanism for the thumb wheel of a Hall output device. It mainly solves the technical problem that the existing Hall output structure with torsion spring has poor accuracy and repeatability in the automatic centering of the thumb wheel.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0005] An automatic centering mechanism for a Hall effect output device includes a support base and a thumb wheel rotatably connected to the support base. The support base has a clearance groove that allows the swing end of the thumb wheel to swing freely. The inner wall of the clearance groove has a left guide ramp and a right guide ramp arranged opposite to each other. An elastic abutment is provided on the swing end of the thumb wheel. The elastic abutment engages with the left guide ramp or the right guide ramp to generate a restoring force that enables the swing end to automatically center at the middle of the left guide ramp and the right guide ramp.

[0006] Furthermore, both the left and right guide ramps are arc-shaped.

[0007] Furthermore, the center of the arc of the left guide ramp is biased toward the right guide ramp, while the center of the arc of the right guide ramp is biased toward the left guide ramp.

[0008] Furthermore, the junction between the left and right guide ramps is smoothly connected.

[0009] Furthermore, an insert groove is provided at the swing end of the thumb wheel, and a spring is installed in the insert groove. The end of the spring is connected to a telescopic pin that can extend and retract in and out of the insert groove. The spring and the telescopic pin cooperate with each other to form an elastic abutment.

[0010] Furthermore, the other end of the thumb wheel away from the swing end is the operating end, and a lever is provided on the operating end.

[0011] Furthermore, two clearance grooves are provided on the support base, and two elastic abutment members are provided on the swing end of the thumb wheel, which respectively elastically abut against the inner walls of the two clearance grooves.

[0012] Based on the same inventive concept, this utility model also provides a Hall output device, including a magnet, a Hall sensor chip, and the aforementioned thumb wheel automatic centering mechanism for the Hall output device. The magnet is mounted on the swing end of the thumb wheel, and the Hall sensor chip is mounted on a support base and correspondingly arranged with the magnet. The magnet is configured to move synchronously with the swing end of the thumb wheel, thereby causing the magnetic field strength that the Hall sensor chip can sense to change so as to output electrical signals of different magnitudes.

[0013] Furthermore, it also includes a housing, which is fitted onto a support base, while the thumb wheel is located in the installation space formed by the housing and the support base.

[0014] Furthermore, a mounting groove is provided on the support base, the Hall sensor chip is fixed in the mounting groove, and a sealing cap is connected to the open end of the mounting groove. The lead wire of the Hall sensor chip passes through the sealing cap, and sealant is poured into the mounting groove.

[0015] The above technical solution has the following advantages or beneficial effects:

[0016] In the Hall output device and the automatic centering mechanism of the thumb wheel described in this utility model, the elastic abutment part and the left guide slope and right guide slope on the inner wall of the avoidance groove can automatically generate an elastic restoring force, so that the thumb wheel can automatically return to the center position. Its overall structure is simple, the restoring force is stable, and the restoring accuracy and repeatability are high. Attached Figure Description

[0017] Figure 1 This is an exploded three-dimensional structural diagram of an embodiment of the present invention.

[0018] Figure 2 This is a cross-sectional view of the thumb wheel in the center of an embodiment of this utility model.

[0019] Figure 3 This is a cross-sectional view of the thumb wheel when it is turned to the right according to an embodiment of this utility model.

[0020] Figure 4 This is a cross-sectional view of the thumb wheel when it is turned to the left according to an embodiment of this utility model.

[0021] Label Explanation:

[0022] 1. Support base, 2. Thumb wheel, 3. Elastic abutment, 4. Magnet, 5. Hall sensor chip, 6. Housing, 11. Clearance groove, 12. Left guide slope, 13. Right guide slope, 14. Mounting groove, 15. Sealing cover, 21. Swing end, 22. Operating end, 31. Spring, 32. Telescopic pin, 221. Handle. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "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.

[0025] Please refer to the appendix. Figure 1 To be continued Figure 4 One embodiment of this utility model provides an automatic centering mechanism for a thumb wheel in a Hall effect output device. It includes a support base 1 and a thumb wheel 2 rotatably connected to the support base 1. The support base 1 has a clearance groove 11 that allows the swing end 21 of the thumb wheel 2 to swing freely. The inner wall of the clearance groove 11 has a left guide slope 12 and a right guide slope 13 arranged opposite to each other. An elastic abutment member 3 is provided on the swing end 21 of the thumb wheel 2. The elastic abutment member 3 engages with the left guide slope 12 or the right guide slope 13 to generate a restoring force that automatically centers the swing end 21 to the middle of the left guide slope 12 and the right guide slope 13. It can be understood that in this embodiment, the elastic abutment member 3 engages with the left guide slope 12 and the right guide slope 13 on the inner wall of the clearance groove 11 to automatically generate an elastic restoring force, causing the thumb wheel 2 to automatically return to the centered position. Its overall structure is simple, the restoring force is stable, and the restoring accuracy and repeatability are high.

[0026] Please refer to the appendix. Figure 1 To be continued Figure 4In one preferred embodiment, both the left guide ramp 12 and the right guide ramp 13 are arc-shaped. The center of the arc of the left guide ramp 12 is offset towards the right guide ramp 13, while the center of the arc of the right guide ramp 13 is offset towards the left guide ramp 12. The junction of the left guide ramp 12 and the right guide ramp 13 is smoothly connected. This arrangement allows the elastic abutment 3 to more smoothly engage with the corresponding left guide ramp 12 and right guide ramp 13 to generate a reset force that automatically centers the thumb wheel 2. Furthermore, since both the left guide ramp 12 and the right guide ramp 13 are arc-shaped, and the center of the arc of the left guide ramp 12 is offset towards the right guide ramp 13, while the center of the arc of the right guide ramp 13 is offset towards the left guide ramp 12, the greater the rotation angle of the thumb wheel 2, the greater the compression of the elastic abutment 3, resulting in a greater reset force.

[0027] Please refer to the appendix. Figure 1 To be continued Figure 4 In one preferred embodiment, a groove is provided at the end of the swing end 21 of the thumb wheel 2, and a spring 31 is installed in the groove. The end of the spring 31 is connected to a telescopic pin 32 that can extend and retract in and out of the groove. The spring 31 and the telescopic pin 32 cooperate to form an elastic abutment 3. In this embodiment, preferably, the end of the telescopic pin 32 is provided with a ball head structure, which helps to improve the elastic abutment and smooth sliding of the telescopic pin 32 with the corresponding left guide slope 12 and right guide slope 13, and avoids jamming that would affect the rotation of the thumb wheel.

[0028] Please refer to the appendix. Figure 1 To be continued Figure 4 In one preferred embodiment, the other end of the thumb wheel 2 away from the swing end 21 is the operating end 22, and the operating end 22 is provided with a lever 221.

[0029] Please refer to the appendix. Figure 1 To be continued Figure 4 In one preferred embodiment, two clearance grooves 11 are provided on the support base 1, and two elastic abutment members 3 are provided on the swing end 21 of the thumb wheel 2, which respectively elastically abut against the inner walls of the two clearance grooves 11. However, those skilled in the art should understand that in other embodiments, other numbers of elastic abutment members 3 may be provided between the thumb wheel 2 and the support base 1, and the embodiment is not limited to the specific implementation disclosed herein.

[0030] Based on the same inventive concept, this utility model also provides a Hall output device, including a magnet 4, a Hall sensor chip 5, and the aforementioned thumb wheel automatic centering mechanism for the Hall output device. The magnet 4 is mounted on the swing end 21 of the thumb wheel 2, and the Hall sensor chip 5 is mounted on the support base 1 and correspondingly positioned to the magnet 4. The magnet 4 is configured to move synchronously with the swing end 21 of the thumb wheel 2, thereby causing changes in the magnetic field strength sensed by the Hall sensor chip 5 to output electrical signals of different magnitudes. In this embodiment, preferably, two magnets symmetrically arranged on the swing end 21 of the thumb wheel are provided, and the N and S magnetic poles of the two magnets 4 are opposite.

[0031] Please refer to the appendix. Figure 1 To be continued Figure 4 In one preferred embodiment, the device further includes a housing 6, which is fitted onto a support base 1, and a thumb wheel 2 is disposed within the mounting space formed by the housing 6 and the support base 1. Furthermore, a notch is provided on the housing 6, through which the handle 221 of the thumb wheel 2 extends for operation by a user.

[0032] Please refer to the appendix. Figure 1 To be continued Figure 4 In one preferred embodiment, a mounting groove 14 is formed on the support base 1, the Hall sensor chip 5 is fixed in the mounting groove 14, and a sealing cover 15 is connected to the open end of the mounting groove 14. The leads of the Hall sensor chip 5 pass through the sealing cover 15, and sealant is poured into the mounting groove 14. By pouring sealant into the mounting groove 14, the Hall sensor chip 5 is encapsulated and sealed by the sealant, preventing the Hall sensor chip 5 from being damaged by moisture or water ingress, thereby improving its stability and service life.

[0033] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A thumbwheel automatic centering mechanism for a Hall effect output device, comprising a support base (1) and a thumbwheel (2) rotatably connected to the support base (1), characterized in that: The support base (1) has a relief groove (11) that allows the swing end (21) of the thumb wheel (2) to swing freely. The inner wall of the relief groove (11) has a left guide slope (12) and a right guide slope (13) arranged opposite to each other. An elastic abutment (3) is provided on the swing end (21) of the thumb wheel (2). The elastic abutment (3) and the left guide slope (12) or the right guide slope (13) are elastically abutted together to generate a restoring force that allows the swing end (21) to automatically return to the middle of the left guide slope (12) and the right guide slope (13).

2. The automatic centering mechanism for the thumb wheel used in the Hall output device according to claim 1, characterized in that: Both the left guide ramp (12) and the right guide ramp (13) are arc-shaped.

3. The thumb wheel automatic centering mechanism for a Hall output device according to claim 2, characterized in that: The center of the arc of the left guide ramp (12) is biased toward the right guide ramp (13), while the center of the arc of the right guide ramp (13) is biased toward the left guide ramp (12).

4. The automatic centering mechanism for the thumb wheel used in the Hall output device according to claim 1, characterized in that: The junction of the left guide ramp (12) and the right guide ramp (13) is smoothly connected.

5. The thumbwheel automatic centering mechanism for a Hall effect output device according to any one of claims 1 to 4, characterized in that: An insert groove is provided at the end of the swing end (21) of the thumb wheel (2), and a spring (31) is installed in the insert groove. The end of the spring (31) is connected to a telescopic pin (32) that can extend and retract in and out of the insert groove. The spring (31) and the telescopic pin (32) cooperate with each other to form an elastic abutment (3).

6. The automatic centering mechanism for the thumb wheel used in the Hall output device according to claim 5, characterized in that: The other end of the thumb wheel (2) away from the swing end (21) is the operating end (22), and a lever (221) is provided on the operating end (22).

7. The automatic centering mechanism for the thumb wheel used in a Hall effect output device according to claim 5, characterized in that: Two clearance grooves (11) are provided on the support base (1), and two elastic abutment members (3) are provided on the swing end (21) of the thumb wheel (2) respectively, which elastically abut against the inner wall of the two clearance grooves (11).

8. A Hall effect output device, comprising a magnet (4), a Hall effect sensor chip (5), and a thumbwheel automatic centering mechanism for the Hall effect output device according to any one of claims 1 to 7, wherein, A magnet (4) is mounted on the swing end (21) of the thumb wheel (2), and a Hall sensor chip (5) is mounted on the support base (1) and correspondingly set with the magnet (4). The magnet (4) is configured to move synchronously with the swing end (21) of the thumb wheel (2), thereby causing the magnetic field strength that the Hall sensor chip (5) can sense to change so as to output electrical signals of different magnitudes.

9. The Hall output device according to claim 8, characterized in that: It also includes a housing (6), which is fitted onto a support base (1), and the thumb wheel (2) is located in the installation space formed by the housing (6) and the support base (1).

10. The Hall output device according to claim 8, characterized in that: A mounting groove (14) is provided on the support base (1), the Hall sensor chip (5) is fixed in the mounting groove (14), and a sealing cover (15) is connected to the open end of the mounting groove (14). The lead wire of the Hall sensor chip (5) passes through the sealing cover (15), and sealant is poured into the mounting groove (14).

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