A Hall-sensing waterproof mouse based on linear Hall element application

Abstract

The present invention discloses a Hall induction waterproof mouse based on the application of linear Hall elements, comprising a mouse bottom plate, a PCB circuit board fixedly arranged on the mouse bottom plate, and a roller rotatably installed above the PCB circuit board, wherein the PCB circuit board is fixedly provided with a Hall micro switch, and the PCB circuit board is provided with a dual-linear Hall component directly below one end of the central rotating shaft of the roller, wherein the dual-linear Hall component is composed of two linear Hall elements A arranged side by side, and when the roller rotates, it drives a magnetic field with alternating polarity to pass above the dual-linear Hall component; and the outer layer of the PCB circuit board is provided with a waterproof coating. The mouse, by utilizing the characteristic of linear output voltage of the induced magnetic field size of the linear Hall element, replaces the mechanical trigger of the traditional mouse through induction triggering, has a longer service life and a lower failure rate, and based on the characteristic of induction triggering, can realize the waterproof coating of the outer layer of the PCB circuit board, greatly enhancing the waterproof property and making it more practical.

Description

Technical Field

[0001] The invention belongs to the technical field of mice, and in particular relates to a Hall-sensing waterproof mouse based on the application of linear Hall elements. Background Art

[0002] Mouse is an external input device for computers and an indicator for the vertical and horizontal coordinates of computer display systems. The use of the mouse is to make computer operation easier and faster, replacing the cumbersome keyboard instructions. The mouse is divided into mechanical mouse and optical mouse according to its working principle. The mechanical mouse is mainly composed of a ball, a roller and a grating signal sensor. When you drag the mouse, the ball rotates, and the ball drives the roller to rotate. The grating signal sensor installed at the end of the roller collects the grating signal. The photoelectric pulse signal generated by the sensor reflects the displacement change of the mouse in the vertical and horizontal directions, and then controls the movement of the cursor arrow on the screen through processing and conversion by the computer program.

[0003] The left and right buttons and the scroll wheel on the existing mechanical mouse are both mechanical structures. The left and right buttons are pressed to move the contacts to contact with the circuit on the PCB and output an electrical signal to trigger the set key command. The scroll wheel detects the deflection of the contacts in the encoder and detects the rotation direction through the potential difference output by the pin, so as to perform the interactive operation of flipping up or down. Both need to be connected to the circuit on the PCB, and the PCB cannot be treated with a separate waterproof coating, resulting in limited waterproof effect.

[0004] In addition, mechanical buttons are easily damaged during long-term contact, and the springs with contacts in the encoder are severely worn during contact and rotation, which will affect the service life of the mouse, so targeted design improvements are needed. Summary of the invention

[0005] The purpose of the present invention is to provide a Hall-sensing waterproof mouse based on the application of a linear Hall element to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a Hall-sensing waterproof mouse based on the application of linear Hall elements, comprising a mouse bottom plate, a PCB circuit board fixedly arranged on the mouse bottom plate, and a roller rotatably installed above the PCB circuit board, the PCB circuit board is fixedly provided with Hall micro switches corresponding to the left and right buttons of the mouse, the PCB circuit board is provided with a bilinear Hall component directly below one end of the central rotating shaft of the roller, the bilinear Hall component is composed of two linear Hall elements A arranged side by side, and when the roller rotates, it drives a magnetic field with alternating polarity to pass above the bilinear Hall component;

[0007] The outer layer of the PCB circuit board is provided with a layer of waterproof coating;

[0008] A U-shaped bracket passing through the PCB circuit board is vertically arranged on the bottom plate of the mouse, a turntable rotatably mounted on the bracket is fixedly engaged with the end of the roller shaft, an even number of magnets A are radially fixedly arranged on the turntable, and the magnetic poles of the proximal ends of any two adjacent magnets A are opposite;

[0009] A positioning structure is provided between the turntable and the bracket, and the positioning structure is composed of a plurality of positioning grooves provided on the side of the turntable and an elastic protrusion fixedly provided on the bracket. The positioning groove is provided on the midline position between adjacent magnets A on the turntable. When the turntable rotates, the elastic protrusions are pressed into the positioning grooves on the side of the turntable in sequence.

[0010] The rotation center of the turntable is located directly above the center of the line connecting the two linear Hall elements A, and the line connecting the two linear Hall elements A is tangent to the line connecting the center of the turntable to the lower end of the turntable;

[0011] The Hall micro switch is composed of an upper shell and a lower shell that are clamped together, a travel rod vertically slidably arranged on the upper shell, a magnet B fixedly arranged at the lower end of the travel rod, a compression spring fixedly arranged at the bottom of the lower shell through a support rod and with the upper end against the lower end of the travel rod, and a linear Hall element B fixedly arranged on a PCB circuit board below the lower shell.

[0012] Preferably, a Hall micro switch is also provided below the central axis of one side of the roller.

[0013] The technical effects and advantages of the present invention are as follows: the Hall-sensing waterproof mouse based on the application of linear Hall elements,

[0014] 1. Based on the working characteristic of the linear Hall element, its output voltage changes linearly with the intensity of the induced magnetic field. The magnetic field with alternating polarity is driven by the rotation of the roller to pass through the top of the dual-linear Hall component. The voltage output by the two linear Hall elements A is received by the single-chip microcomputer. The magnetic field passing through is identified as the N pole or the S pole by the voltage change. By identifying the change mode of the S and N poles, the reverse rotation of the roller is detected, thereby executing the up or down command. In addition, the Hall micro switch also outputs voltage through magnetic field induction, without contact, and without pin connection to the PCB circuit, so that the outer layer of the PCB circuit board can be independently provided with a waterproof coating, which greatly enhances the waterproof effect and is more practical.

[0015] 2. Compared with the friction transmission of the contact spring in the encoder in the traditional mouse, the two pins output the potential to the microcontroller on the PCB circuit board. The encoder will be worn out after long-term use and the service life is short. The inductive trigger in this case is more sensitive and has a longer service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the connection between the turntable and the bracket;

[0018] Figure 3 It is a structural schematic diagram of the Hall micro switch;

[0019] Figure 4 is a structural schematic diagram of the positioning structure;

[0020] Figure 5 It is a line graph of the relationship between the output voltage and magnetic field change of the linear Hall element;

[0021] Figure 6 These are two waveforms output when a changing magnetic field passes over a bilinear Hall element.

[0022] In the figure: 1, mouse bottom plate; 2, positioning structure; 21, positioning groove; 22, elastic protrusion;

[0023] 3. Roller; 4. Hall micro switch; 41. Upper housing; 42. Lower housing; 43. Travel rod; 44. Magnet B; 45. Support rod; 46. Compression spring; 47. Linear Hall element B;

[0024] 5. Dual linear Hall element; 51. Linear Hall element A;

[0025] 6. Magnet A; 7. Turntable; 8. PCB circuit board; 9. Bracket. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] The present invention provides Figure 1 A Hall-sensing waterproof mouse based on the application of linear Hall elements is shown, comprising a mouse base 1, a PCB circuit board 8 fixedly arranged on the mouse base 1, and a roller 3 rotatably installed above the PCB circuit board 8, wherein the PCB circuit board 8 is fixedly provided with Hall micro switches 4 corresponding to the left and right buttons of the mouse, and the PCB circuit board 8 is provided with a bilinear Hall component 5 directly below one end of the central rotating shaft of the roller 3, wherein the bilinear Hall component 5 is composed of two linear Hall elements A51 arranged side by side, and when the roller 3 rotates, it drives a magnetic field with alternating polarity to pass above the bilinear Hall component 5;

[0028] The outer layer of the PCB circuit board 8 is provided with a waterproof coating.

[0029] According to the working characteristics of the linear Hall element, its output voltage changes linearly with the induced magnetic field strength. Figure 5 As shown;

[0030] like Figure 6 As shown, when the roller 3 rotates forward, the magnetic field above the bilinear Hall component 5 is alternately changed, and the two linear Hall elements A51 ( Figure 6 Sensor1 and sensor2 in the sensor sense the magnetic field change, so the output voltage waveform is as shown in the figure Figure 4 As shown in the figure, the positive magnetic field of the S pole approaches sensor1 first, and the output voltage of the linear Hall element A51 continues to rise. It reaches the maximum when the positive magnetic field of the S pole is directly above the linear Hall element A51. Then the positive magnetic field of the S pole approaches another linear Hall element A51 sensor2. Since the positive magnetic field of the S pole is always approaching sensor2, its output voltage continues to rise.

[0031] When the N pole passes through sensor 1 and sensor 2 successively, since the N pole provides a negative magnetic field, when the N pole approaches sensor 1, the output voltage continues to decrease, and reaches the lowest when the N pole is directly above it. After that, the N pole magnetic field gradually moves away from sensor 1, and the output voltage begins to increase. At the same time, for sensor 2, the N pole magnetic field continues to approach, and the output voltage continues to decrease.

[0032] And obviously, in the process of reversing roller 3, the voltage waveforms output by sensor 1 and sensor 2 are just swapped.

[0033] Therefore, when the single-chip microcomputer receives the voltage output by sensor1 and sensor2, when one of the voltages rises or falls first and the other rises continuously, it is recognized that the S-pole magnetic field passes above, and when one of the voltages falls first and then rises while the other falls continuously, it is recognized that the N-pole magnetic field passes above. When the single-chip microcomputer detects multiple magnetic field changes of SNSN, it recognizes that the roller 3 is turned down or up, and when it detects multiple magnetic field changes of NSNS, it recognizes that the roller 3 is turned up or down, thereby executing the interactive command of the host to scroll up or down. Through the characteristics of linear Hall induction, the single-chip microcomputer detects the input voltage change to achieve the encoder function of replacing the traditional mouse wheel 3, without the need to conduct with the PCB board circuit through the pin, and with the Hall microswitch 4, the output voltage is also output through magnetic field induction without contact, so that the outer layer of the PCB circuit board 8 can be independently provided with a waterproof coating, which greatly enhances the waterproof effect. Compared with the trigger principle of the buttons and the roller 3 of the traditional mouse, the execution of the program through electromagnetic induction triggering is more sensitive, has a longer service life, and is more practical.

[0034] like Figure 2 As shown, a U-shaped bracket 9 passing through the PCB circuit board is vertically arranged on the mouse bottom plate 1, and a turntable 7 rotatably mounted on the bracket 9 is fixedly connected with the end of the rotating shaft of the roller 3. An even number of magnets A6 are radially fixedly arranged on the turntable 7, and the magnetic poles of the adjacent ends of any two adjacent magnets A6 are opposite. During the rotation of the roller 3, the turntable 7 is driven to rotate, thereby driving the even number of magnets A6 on the turntable 7 to rotate, so that magnetic fields of opposite polarities alternately pass over the top of the bilinear Hall component 5, and the two linear Hall elements A51 output a changing voltage, which is transmitted to the single-chip microcomputer.

[0035] like Figure 4 As shown, a positioning structure 2 is provided between the turntable 7 and the bracket 9. The positioning structure 2 is composed of a plurality of positioning grooves 21 provided on the side of the turntable 7 and an elastic protrusion 22 fixedly provided on the bracket 9. The positioning groove 21 is provided on the midline position between the adjacent magnets A6 on the turntable 7. When the turntable 7 rotates, the elastic protrusion 22 is pressed into the positioning groove 21 on the side of the turntable 7 in sequence. It is ensured that when the rotating roller 3 drives the turntable 7 to rotate, after each magnetic pole with different polarity passes over the bilinear Hall component 5, the elastic protrusion 22 is inserted into the positioning groove 21 of the turntable 7, so that the bilinear Hall component 5 is located directly below the intersection of the two polar magnetic fields, avoiding the S pole or N pole being located just above the bilinear Hall component 5 in the initial state, thereby causing the situation that the roller 3 recognizes the SNSN or NSNS magnetic field change regardless of whether it is forward or reverse, and cannot recognize the command of the roller 3 to rotate forward or reverse.

[0036] The rotation center of the turntable 7 is located directly above the center of the line connecting the two linear Hall elements A51, and the line connecting the two linear Hall elements A51 is tangent to the line connecting the center of the turntable 7 to the bottom of the turntable 7. This ensures that the linear Hall element A51 can detect the passing magnetic field and its size change more accurately, ensures that the output voltage changes more accurately, and presents a smoother and more accurate waveform, so as to facilitate the recognition of the single-chip microcomputer and the activation efficiency of the execution program.

[0037] like Figure 3 As shown, the Hall micro switch 4 is composed of an upper shell 41 and a lower shell 42 that are mutually engaged, a travel rod 43 that is vertically slidably arranged on the upper shell 42, a magnet B 44 that is fixedly arranged at the lower end of the travel rod 43, a compression spring 46 that is fixedly arranged at the bottom of the lower shell 42 through a support rod 45 and whose upper end abuts against the lower end of the travel rod 43, and a linear Hall element B 47 that is fixedly arranged on a PCB circuit board 8 below the lower shell 42. By pressing the travel rod 43 so that the travel rod 43 drives the lower end magnet B 44 to descend, the linear Hall element B 47 increases the output voltage as the induced field strength increases and transmits it to the single-chip microcomputer, and activates the corresponding program command when the voltage output reaches the set threshold, thereby achieving the technical effect of the left and right buttons of a traditional mouse.

[0038] A Hall micro switch 4 is also provided below the central axis of the roller 3 away from the bracket 9. When the roller 3 is pressed, the other central axis of the roller 3 presses down the pressing handle 45 of the Hall micro switch 4 below, realizing the shuttle command of the traditional mouse, thereby dragging the mouse to turn pages quickly, which is more practical.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A Hall-sensing waterproof mouse based on the application of a linear Hall element, comprising a mouse base plate (1), a PCB circuit board (8) fixedly arranged on the mouse base plate (1), and a roller (3) rotatably installed above the PCB circuit board (8), wherein the PCB circuit board (8) is fixedly provided with Hall micro switches (4) corresponding to the left and right buttons of the mouse, and characterized in that: The PCB circuit board (8) is provided with a bilinear Hall assembly (5) located just below one end of the central rotating shaft of the roller (3). The bilinear Hall assembly (5) is composed of two linear Hall elements A (51) arranged side by side. When the roller (3) rotates, a magnetic field with alternating polarity is driven to pass above the bilinear Hall assembly (5); The outer layer of the PCB circuit board (8) is provided with a layer of waterproof coating; A U-shaped bracket (9) passing through a PCB circuit board (8) is vertically arranged on the mouse bottom plate (1); a turntable (7) rotatably mounted on the bracket (9) is fixedly engaged with the end of a rotating shaft of the roller (3); an even number of magnets A (6) are radially fixedly arranged on the turntable (7); and the magnetic poles of the proximal ends of any two adjacent magnets A (6) are opposite; A positioning structure (2) is provided between the turntable (7) and the bracket (9), the positioning structure (2) being composed of a plurality of positioning grooves (21) provided on the side of the turntable (7) and an elastic protrusion (22) fixedly provided on the bracket (9), the positioning grooves (21) being provided at the midline position between adjacent magnets A (6) on the turntable (7), and when the turntable (7) rotates, the elastic protrusions (22) are sequentially pressed into the positioning grooves (21) on the side of the turntable (7); The rotation center of the turntable (7) is located directly above the center of the line connecting the two linear Hall elements A (51), and the line connecting the two linear Hall elements A (51) is tangent to the line connecting the center of the turntable (7) to the lowermost end of the turntable (7); The Hall micro switch (4) is composed of an upper shell (41) and a lower shell (42) that are mutually engaged, a travel rod (43) that is vertically slidably arranged on the upper shell (41), a magnet B (44) that is fixedly arranged at the lower end of the travel rod (43), a compression spring (46) that is fixedly arranged at the bottom of the lower shell (42) through a support rod (45) and whose upper end abuts against the lower end of the travel rod (43), and a linear Hall element B (47) that is fixedly arranged on a PCB circuit board (8) below the lower shell (42).

2. The Hall-sensing waterproof mouse based on the linear Hall element according to claim 1, characterized in that: A Hall micro switch (4) is also provided below the central axis of one side of the roller (3).

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