Device for large-range touch recognition

Abstract

The utility model relates to a device for large-range touch recognition. The device comprises a base, the device comprises a base, a protective shell is fixedly installed at the top of the base, four first supporting columns distributed in a rectangular shape are fixedly installed at the bottom of the base, a circuit control board with the bottom attached to the tops of the four first supporting columns is arranged in the protective shell, and a motor located above the circuit control board is arranged in the protective shell; a recognition assembly located above the motor is arranged in the protective shell, an output shaft of the motor drives the connecting rod to rotate, the laser emitting and receiving module also rotates and starts to work, the distance is worked out through the time difference between laser emitting and reflected laser receiving, and the recognition assembly is used for recognizing the distance. And angle and distance information is combined by matching with an angle encoder, so that the touch position is judged, and is converted into related protocols such as simulation touch or a mouse, tuio and the like, and a low-cost ultra-large screen touch recognition function is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of large-screen touch recognition, and particularly relates to a device for large-range touch recognition. Background Art

[0002] The demand for large-screen touch refers to the widespread demand and application of large-size touch screens in modern technological products, especially in the field of display devices. Large-screen touch provides a more intuitive and natural interaction method. Users can directly operate the device by touching the screen with their fingers. Among the devices with large-screen touch functions on the market, either there is a large screen with a built-in touch function, or a retrofitted touch frame is selected to cooperate with the use of the large screen.

[0003] However, when using the above two types of devices, the required cost is relatively high. Therefore, a device for large-range touch recognition is proposed to solve the above problems. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a device for large-range touch recognition to overcome the deficiencies in the above-mentioned prior art.

[0005] The technical solution for the utility model to solve the above technical problem is as follows: A device for large-range touch recognition includes a base; a protective shell is fixedly installed on the top of the base, and four first support columns distributed in a rectangular shape are fixedly installed at the bottom of the base. A circuit control board with its bottom fitting the tops of the four first support columns is arranged inside the protective shell. A motor is arranged inside the protective shell above the circuit control board, and an identification component is arranged inside the protective shell above the motor;

[0006] The identification component includes a first connecting plate, a laser emission and reception module, a laser protective cover, a connecting rod, and an angle encoder. The bottom of the laser protective cover is fixedly connected to the top of the first connecting plate. The connecting rod is rotatably connected to the center of the first connecting plate. The bottom of the laser emission and reception module is fixedly connected to the top of the connecting rod. The bottom of the connecting rod is fixedly connected to the outside of the output shaft of the motor, and the angle encoder is fixedly installed on the outside of the connecting rod and below the first connecting plate.

[0007] The beneficial effect of the utility model is that the output shaft of the motor drives the connecting rod to rotate, causing the laser emission and reception module to also rotate and start working. The distance is calculated through the time difference between the emitted laser and the reflected laser received, and the angle and distance information are combined with the cooperation of the angle encoder to determine the touch position, so as to convert it into an analog touch or relevant protocols such as mouse, tuio, etc., realizing the function of low-cost ultra-large screen touch recognition.

[0008] On the basis of the above technical solutions, the present utility model can also be improved as follows.

[0009] Further, a shell cover is provided at the top of the protective shell. A first mounting hole with a size adapted to the size of the laser protective cover is opened at the top of the shell cover. The top of the shell cover is fixed to the protective shell by a first fastener.

[0010] Further, four second mounting holes are opened at the top of the circuit control board, and the positions of the four second mounting holes respectively correspond to the positions of the four first support columns. The circuit control board is fixed to the first support column by a second fastener passing through the second mounting hole.

[0011] Further, a rubber vibration isolation pad is provided at the bottom of the motor. The bottom of the rubber vibration isolation pad is fixedly connected to a second connecting plate. Four second support columns are fixedly installed at the top of the base and are distributed in a rectangular shape. Four mounting columns are provided at the bottom of the second connecting plate, and the positions of the four mounting columns respectively correspond to the positions of the four second support columns. The bottoms of the four mounting columns all penetrate through the circuit control board and are respectively threadedly connected to the four second support columns. The second connecting plate and the mounting columns are fixed by a third fastener.

[0012] Further, a third connecting plate is fixedly installed on the outside of the motor. Four third support columns are fixedly installed at the top of the third connecting plate and are distributed in a rectangular shape. The first connecting plate is fixed to the third support columns by a fourth fastener.

[0013] Further, four positioning holes are opened at the top of the base and are distributed in a rectangular shape. The motor is a stepping motor. Description of the Drawings

[0014] Figure 1 is an exploded structural schematic diagram of the present utility model;

[0015] Figure 2 is a front view three-dimensional structural schematic diagram of the present utility model;

[0016] Figure 3 is a front view sectional structural schematic diagram of the present utility model;

[0017] Figure 4 is a structural schematic diagram of the laser emission and reception module of the present utility model;

[0018] Figure 5 is an identification coordinate conversion schematic diagram of the present utility model;

[0019] Figure 6 is a coordinate merging conversion schematic diagram of the present utility model;

[0020] Figure 7 is a coordinate mapping schematic diagram of the present utility model.

[0021] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0022] 1. Base; 2. Protective shell; 3. First support column; 4. Circuit control board; 5. Motor; 6. First connecting plate; 7. Laser emission and reception module; 8. Laser protective cover; 9. Connecting rod; 10. Angle encoder; 11. Housing cover; 12. First mounting hole; 13. First fastener; 14. Second mounting hole; 15. Second fastener; 16. Rubber vibration isolation pad; 17. Second connecting plate; 18. Second support column; 19. Mounting column; 20. Third fastener; 21. Third connecting plate; 22. Third support column; 23. Fourth fastener; 24. Positioning hole. Specific implementation mode

[0023] The principles and features of the present utility model will be described below in conjunction with the attached drawings. The examples given are only used to explain the present utility model and are not intended to limit the scope of the present utility model.

[0024] Example 1, as Figures 1 to 4 shown, a device for large-range touch recognition includes a base 1; a protective shell 2 is fixedly installed on the top of the base 1, four first support columns 3 distributed in a rectangle are fixedly installed on the bottom of the base 1, a circuit control board 4 with its bottom fitting the tops of the four first support columns 3 is arranged inside the protective shell 2, a motor 5 is arranged above the circuit control board 4 inside the protective shell 2, and a recognition component is arranged above the motor 5 inside the protective shell 2;

[0025] The recognition component includes a first connecting plate 6, a laser emission and reception module 7, a laser protective cover 8, a connecting rod 9 and an angle encoder 10. The bottom of the laser protective cover 8 is fixedly connected to the top of the first connecting plate 6. The connecting rod 9 is rotatably connected to the center of the first connecting plate 6. The bottom of the laser emission and reception module 7 is fixedly connected to the top of the connecting rod 9. The bottom of the connecting rod 9 is fixedly connected to the outside of the output shaft of the motor 5. The angle encoder 10 is fixedly installed on the outside of the connecting rod 9 and below the first connecting plate 6.

[0026] The output shaft of the motor 5 drives the connecting rod 9 to rotate, so that the laser emission and reception module 7 also rotates and starts to work. The distance is calculated by the time difference between the emitted laser and the reflected laser, and the angle and distance information are combined with the cooperation of the angle encoder 10 to determine the touch position. A transmission interface is provided on the front side of the protective shell 2 to supply power to the circuit control board 4 to ensure the stable operation of the components inside the protective shell 2. The laser emission and reception module 7 uses a low-power infrared laser as the emission light source, with a minimum value of 895 nm, a maximum value of 915 NM, and a typical value of 905 nm.

[0027] Example 2, as Figures 1 to 4 shown, this example is a further improvement based on Example 1, and the details are as follows: A housing cover 11 is provided at the top of the protective housing 2. A first mounting hole 12 with a size adapted to the size of the laser protective cover 8 is provided at the top of the housing cover 11. The top of the housing cover 11 is fixed to the protective housing 2 through a first fastener 13.

[0028] A waterproof pad can also be provided at the connection between the housing cover 11 and the laser protective cover 8 to prevent water from entering the interior of the protective housing 2, thus avoiding inconvenient subsequent use.

[0029] Example 3, as Figures 1 to 4 shown, this example is a further improvement based on Example 1, and the details are as follows: Four second mounting holes 14 are provided at the top of the circuit control board 4, and the positions of the four second mounting holes 14 correspond to the positions of the four first support columns 3 respectively. The circuit control board 4 is fixed to the first support column 3 through a second fastener 15 passing through the second mounting hole 14.

[0030] The position of the circuit control board 4 is restricted, which is convenient for the subsequent installation of components and ensures the stability during use.

[0031] Example 4, as Figures 1 to 4 shown, this example is a further improvement based on Example 1, and the details are as follows: A rubber vibration isolation pad 16 is provided at the bottom of the motor 5. The bottom of the rubber vibration isolation pad 16 is fixedly connected to a second connecting plate 17. Four second support columns 18 are fixedly installed at the top of the base 1 and are distributed in a rectangular shape. Four mounting columns 19 are provided at the bottom of the second connecting plate 17, and the positions of the four mounting columns 19 correspond to the positions of the four second support columns 18 respectively. The bottoms of the four mounting columns 19 all penetrate through the circuit control board 4 and are respectively threadedly connected to the four second support columns 18. The second connecting plate 17 and the mounting columns 19 are fixed through a third fastener 20.

[0032] The vibration generated downward by the motor 5 during operation is absorbed by the rubber vibration isolation pad 16, thereby reducing the damage to the circuit control board 4 caused by vibration and extending the service life of the entire device.

[0033] Example 5, as Figures 1 to 4 shown, this example is a further improvement based on Example 1, and the details are as follows: A third connecting plate 21 is fixedly installed on the outside of the motor 5. Four third support columns 22 are fixedly installed at the top of the third connecting plate 21 and are distributed in a rectangular shape. The first connecting plate 6 is fixed to the third support columns 22 through a fourth fastener 23.

[0034] Install the circuit control board 4, the motor 5 and the recognition component step by step from bottom to top, and there are components that can provide support between them, which is more convenient during installation and disassembly, and can improve the stability of the internal components of the protective shell 2 after the device is installed.

[0035] Example 6, as Figures 1 to 4 shown, this example is a further improvement based on Example 1, and the specific content is as follows: There are four positioning holes 24 distributed in a rectangular shape on the top of the base 1, and the motor 5 is a stepper motor.

[0036] The device can be easily installed through the positioning holes 24. The stepper motor 5 is the main actuator in the digital program control system and is widely used, which can improve the accuracy of the entire device during the recognition process.

[0037] Please refer to Figures 5 to 7 , the initial real-time polar coordinates can be obtained according to the angle and distance information. Subsequently, through software algorithms, the initial polar coordinate data is converted into the coordinates of the X and Y axes. Then, the obtained X and Y axis coordinates are analyzed for data merging and noise reduction processing to form a set of points. The points with similar ranges are merged to calculate the center point, and one or more merged coordinates (such as 3 position coordinates a, b, c) are obtained. Furthermore, the data of the merged coordinates is transmitted, and through the mapping system or the software interface position (sending coordinates), it is applied to the operating system to form a multi-touch effect.

[0038] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A device for large-range touch recognition, characterized in that, It includes a base (1); a protective shell (2) is fixedly installed on the top of the base (1), four first support columns (3) which are rectangularly distributed are fixedly installed on the bottom of the base (1), a circuit control board (4) with its bottom fitting the tops of the four first support columns (3) is arranged inside the protective shell (2), a motor (5) is arranged above the circuit control board (4) inside the protective shell (2), and an identification component is arranged above the motor (5) inside the protective shell (2). The identification component includes a first connecting plate (6), a laser emission and reception module (7), a laser protective cover (8), a connecting rod (9) and an angle encoder (10). The bottom of the laser protective cover (8) is fixedly connected to the top of the first connecting plate (6). The connecting rod (9) is rotatably connected to the center of the first connecting plate (6). The bottom of the laser emission and reception module (7) is fixedly connected to the top of the connecting rod (9). The bottom of the connecting rod (9) is fixedly connected to the outside of the output shaft of the motor (5). The angle encoder (10) is fixedly installed on the outside of the connecting rod (9) and below the first connecting plate (6).

2. The device for large-range touch recognition according to claim 1, characterized in that, A shell cover (11) is arranged on the top of the protective shell (2). A first mounting hole (12) with a size adapted to that of the laser protective cover (8) is opened on the top of the shell cover (11). The top of the shell cover (11) is fixed to the protective shell (2) through a first fastener (13).

3. The device for large-range touch recognition according to claim 1, characterized in that, Four second mounting holes (14) corresponding to the positions of the four first support columns (3) respectively are opened on the top of the circuit control board (4). The circuit control board (4) is fixed to the first support columns (3) through the second fasteners (15) passing through the second mounting holes (14).

4. A device for large-range touch recognition according to claim 1, characterized in that, A rubber vibration isolation pad (16) is arranged at the bottom of the motor (5). The bottom of the rubber vibration isolation pad (16) is fixedly connected to a second connecting plate (17). Four second support columns (18) which are rectangularly distributed are fixedly installed on the top of the base (1). Four mounting columns (19) corresponding to the positions of the four second support columns (18) respectively are arranged at the bottom of the second connecting plate (17). The bottoms of the four mounting columns (19) all penetrate through the circuit control board (4) and are respectively threadedly connected to the four second support columns (18). The second connecting plate (17) and the mounting columns (19) are fixed through a third fastener (20).

5. The device for large-range touch recognition according to claim 1, characterized in that, A third connecting plate (21) is fixedly installed on the outside of the motor (5). Four third support columns (22) which are rectangularly distributed are fixedly installed on the top of the third connecting plate (21). The first connecting plate (6) is fixed to the third support columns (22) through a fourth fastener (23).

6. The device for large-range touch recognition according to claim 1, characterized in that, Four positioning holes (24) which are rectangularly distributed are opened on the top of the base (1). The motor (5) is a stepping motor.

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