A meter structure for reducing magnetic interference

Abstract

The utility model relates to a kind of meter head structures for reducing magnetic interference, including watchcase base body and the mainboard and charging magnet embedded in the inside of watchcase base body;The charging magnet is located in one side of mainboard, and the surface of charging magnet is covered with anti-magnetic interference shield, and geomagnetic sensor is provided on the mainboard, and there is spatial distance between geomagnetic sensor and charging magnet.By setting anti-magnetic interference shield on the surface of charging magnet, and combining reasonable charging magnet and geomagnetic sensor layout, distance-shielding double anti-interference mechanism is formed, so that the position of geomagnetic sensor is measured magnetic field intensity is greatly reduced, compass azimuth error≤10 °, both can realize magnetic attraction type charging, and can effectively reduce magnet interference to geomagnetic sensor, enhance the use experience of user.

Description

Technical Field

[0001] This utility model relates to the field of electronic product technology, specifically to a meter structure that reduces magnetic interference. Background Technology

[0002] With the continuous development of science and technology, smartwatches have gradually appeared in people's lives, and their functions are becoming increasingly rich. Among them, the compass / direction detection function is particularly popular with users. To achieve this function, a geomagnetic sensor needs to be built into the watch. At the same time, magnetic charging structures are widely used in smartwatches due to their convenience. However, the magnets in the magnetic charging structure generate a strong static magnetic field, which causes serious magnetic interference to the sensitive geomagnetic sensor, leading to a significant increase in its measurement error and greatly affecting the accuracy and practicality of the compass function.

[0003] Current solutions to this problem have many shortcomings. For example, abandoning magnetic charging in favor of direct plug-in charging, while avoiding magnetic interference, significantly reduces the user experience. Simply increasing the distance between the magnet and the sensor is difficult to implement due to the extremely limited internal space of the watch and is rarely used. Software filtering algorithms, on the one hand, cannot eliminate the static magnetic field offset at the hardware level, and on the other hand, require significant investment in algorithm research and optimization. Therefore, developing a technical solution that can achieve both magnetic charging and effectively reduce the interference of magnets on the geomagnetic sensor is urgently needed. Utility Model Content

[0004] This invention addresses the technical problems existing in the prior art by providing a meter structure that reduces magnetic interference.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] A watch head structure for reducing magnetic interference includes a watch case base, a main board and a charging magnet embedded inside the watch case base; the charging magnet is located on one side of the main board, and the surface of the charging magnet is covered with an anti-magnetic interference shield; a geomagnetic sensor is installed on the main board, and there is a spatial distance between the geomagnetic sensor and the charging magnet.

[0007] The beneficial effects of this utility model are: by setting an anti-magnetic interference shield on the surface of the charging magnet and combining it with a reasonable layout of the charging magnet and the geomagnetic sensor, a dual anti-interference mechanism of distance and shielding is formed, which greatly reduces the measured magnetic field strength at the position of the geomagnetic sensor and the compass azimuth error is ≤10°. It can realize magnetic charging and effectively reduce the interference of the magnet on the geomagnetic sensor, thus enhancing the user experience.

[0008] Furthermore, the inner wall of the watch case base is provided with a positioning groove for positioning and installing the charging magnet. This positioning groove can accurately determine the position of the charging magnet, ensuring the consistency of the charging magnet installation, and fixing the relative position of the charging magnet and other components in each watch head structure, thereby ensuring the stability of the anti-magnetic interference effect.

[0009] Furthermore, the motherboard has pre-set mounting points for the geomagnetic sensor. These pre-set mounting points ensure the accuracy of the geomagnetic sensor's installation position, which helps improve the overall meter structure's resistance to magnetic interference.

[0010] Furthermore, the geomagnetic sensor is mounted on the side of the motherboard away from the charging magnet and at the edge furthest from the charging magnet. This arrangement maximizes the spatial distance between the geomagnetic sensor and the charging magnet, reducing the direct impact of the charging magnet's magnetic field on the sensor.

[0011] Furthermore, at least two charging magnets are provided, symmetrically arranged along the geometric center of the casing base, and the horizontal distance from each charging magnet to the geomagnetic sensor is equal. The symmetrical arrangement of the charging magnets ensures the uniformity of the magnetic field distribution during charging, avoiding additional interference to other components due to uneven magnetic fields. Simultaneously, the equal horizontal distance from each charging magnet to the geomagnetic sensor ensures that the degree of magnetic interference received by the geomagnetic sensor from each charging magnet is consistent, which is beneficial for uniform interference suppression through measures such as anti-magnetic interference shielding.

[0012] Furthermore, the anti-magnetic interference shield is made of a high-permeability material. High-permeability materials can effectively guide the magnetic field generated by the magnet, confining it within a certain area, thus physically blocking the diffusion path of the magnetic field to the geomagnetic sensor and reducing interference from the outward diffusion of the magnetic field to other components.

[0013] Furthermore, the anti-magnetic interference shield is made of a high-nickel alloy material with extremely high magnetic permeability.

[0014] Furthermore, the thickness of the anti-magnetic interference shield is 0.15mm. This ensures that the anti-magnetic interference shield has a good magnetic field shielding effect without affecting the adsorption strength of the charging magnet.

[0015] Furthermore, the anti-magnetic interference shield is glued to the surface of the charging magnet, resulting in a more secure fit. Attached Figure Description

[0016] Figure 1 This is an exploded structural diagram of an embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram showing the positional relationship between the charging magnet and the geomagnetic sensor in an embodiment of this utility model;

[0018] Figure 3 This is a schematic diagram of the anti-magnetic interference shielding structure according to an embodiment of the present invention;

[0019] The attached diagram lists the components represented by each number as follows:

[0020] 1. Case base; 2. Mainboard; 3. Charging magnet; 4. Positioning groove; 5. Geomagnetic sensor; 6. Anti-magnetic interference shield. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] In the description of this application, 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0023] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this technology based on the specific circumstances.

[0024] In the description of this application, spatial relation terms such as "below," "under," "below," "below," "above," "over," etc., are used herein to describe the relationship between one element or feature shown in the figures and other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, an element or feature described as "below" or "under" or "below" of other elements or features will be oriented "above" other elements or features. Therefore, the exemplary terms "below" and "under" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein are interpreted accordingly.

[0025] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0026] Example 1

[0027] like Figures 1 to 3 As shown, this embodiment provides a meter head structure to reduce magnetic interference, including a meter case base 1, a main board 2 and a charging magnet 3 embedded inside the meter case base 1. Wherein:

[0028] The inner wall of the watch case base 1 is precisely machined with positioning grooves 4 for positioning and installing the charging magnet 3. These positioning grooves 4 can accurately determine the position of the charging magnet 3, ensuring the consistency of the installation of the charging magnet 3, and fixing the relative position of the charging magnet 3 with other components in each watch head structure, thereby ensuring the stability of the anti-magnetic interference effect; at the same time, the design of the positioning grooves 4 facilitates the installation and fixing of the charging magnet 3, improving production assembly efficiency.

[0029] A geomagnetic sensor 5 is mounted on the motherboard 2, and there is a spatial distance between the geomagnetic sensor 5 and the charging magnet 3. In this embodiment, the motherboard 2 has a pre-set mounting point for the geomagnetic sensor, which is located on the side of the motherboard 2 away from the charging magnet 3 and at the edge furthest from the charging magnet 3. Specifically, the horizontal distance between the geomagnetic sensor 5 and the charging magnet 3 is 27.46 mm, which is also the farthest distance from the charging magnet on the motherboard 2. The pre-set mounting point ensures the accuracy of the installation position of the geomagnetic sensor 5, which is beneficial to improving the anti-magnetic interference performance of the entire meter structure; mounting the geomagnetic sensor 5 on the side of the motherboard 2 away from the charging magnet 3 and at the edge furthest from the charging magnet 3 maximizes the spatial distance between the geomagnetic sensor 5 and the charging magnet 3, reducing the direct influence of the magnetic field of the charging magnet 3 on the sensor.

[0030] The charging magnet 3 is located on one side of the motherboard 2, and its surface is covered with an anti-magnetic interference shield 6. In this embodiment, the charging magnet 3 can be a neodymium iron boron permanent magnet, which has a high magnetic energy product and can ensure the stability of magnetic charging. At least two charging magnets 3 are provided, symmetrically arranged along the geometric center of the casing base 1, and the horizontal distance from each charging magnet 3 to the geomagnetic sensor 5 is equal. The symmetrical arrangement of the charging magnets 3 can ensure the uniformity of the magnetic field distribution during charging, avoiding additional interference to other components due to uneven magnetic field. At the same time, the equal horizontal distance from each charging magnet 3 to the geomagnetic sensor 5 ensures that the geomagnetic sensor 5 is subjected to a consistent degree of magnetic interference from each charging magnet 3, which is beneficial for uniform interference suppression through measures such as the anti-magnetic interference shield 6.

[0031] The antimagnetic interference shield 6 is made of a high-permeability material and can be glued to the surface of the charging magnet 3. The high permeability material effectively guides the magnetic field generated by the magnet, confining it within a certain area. This physically blocks the diffusion path of the magnetic field to the geomagnetic sensor 5, reducing interference from the outward diffusion of the magnetic field to other components. In this embodiment, the antimagnetic interference shield 6 is made of a high-nickel alloy with extremely high permeability. The thickness of the antimagnetic interference shield 6 is 0.15mm. Extensive experiments and practical applications have verified that this thickness ensures the antimagnetic interference shield 6 has a good magnetic field shielding effect while effectively confining the magnetic field of the charging magnet 3 without significantly increasing the weight and volume of the watch head structure. This ensures the watch head structure can perform optimally in antimagnetic interference within the space and weight constraints of a smartwatch, without affecting the adsorption strength of the charging magnet 3.

[0032] Example 2

[0033] This embodiment, based on Embodiment 1, performs geomagnetic testing on the above structure.

[0034] 1. Test conditions

[0035] Test environment: A stable magnetic field environment, away from strong magnetic field interference (such as mobile phones, transformers, rotating motors, substations, high-voltage corridors, etc.); when using a compass, keep it away from metal objects, metal pipes, and wires.

[0036] 2. Test Procedure

[0037] 1. Use an angle caliper as a reference;

[0038] 2. Device under test: Calibrate on the compass interface before testing;

[0039] 3. Fix the device under test in the center position;

[0040] 4. Rotate the watch to a fixed angle, such as 15°, according to the angle caliper, and record the indicated value.

[0041] 5. After completing one full rotation in step four, recalibrate the watch and repeat the above steps five times, recording the data.

[0042] 3. Criteria for acceptance

[0043] The relative angle deviation of the product compass is ≤10°.

[0044] 4. Test Results

[0045] (1) The geomagnetic test data without reducing magnetic interference are as follows:

[0046]

[0047] (2) The geomagnetic test data results after adding the meter header structure are as follows:

[0048]

[0049] As can be seen from the table above, with the original magnet, the geomagnetic rotation error value can vary drastically by up to 63°. However, after adding the meter head structure, the error value is well within 10°, and the stability is greatly improved. The test results fully demonstrate the shielding effect on suppressing magnetic field interference, and all core indicators meet the preset target (error ≤ 10°).

[0050] While embodiments or examples of this disclosure have been described with reference to the accompanying drawings, it should be understood that the above embodiments are merely exemplary embodiments or examples, and the scope of this utility model is not limited by these embodiments or examples, but only by the granted claims and their equivalents. Various elements in the embodiments or examples may be omitted or replaced by their equivalents. Furthermore, the steps may be performed in a different order than that described in this disclosure. Further, various elements in the embodiments or examples may be combined in various ways. Importantly, as the technology evolves, many elements described herein can be replaced by equivalents that appear after this disclosure.

Claims

1. A meter structure for reducing magnetic interference, characterized in that, The watch includes a watch case base, a motherboard and a charging magnet embedded inside the watch case base; the charging magnet is located on one side of the motherboard, and the surface of the charging magnet is covered with an anti-magnetic interference shield. A geomagnetic sensor is installed on the motherboard, and there is a spatial distance between the geomagnetic sensor and the charging magnet.

2. The meter structure for reducing magnetic interference according to claim 1, characterized in that, The inner wall of the watch case base is provided with a positioning groove for positioning and installing the charging magnet.

3. The meter structure for reducing magnetic interference according to claim 1, characterized in that, The motherboard has pre-set installation points for geomagnetic sensors.

4. The meter structure for reducing magnetic interference according to claim 3, characterized in that, The geomagnetic sensor is installed on the side of the motherboard away from the charging magnet and on the edge furthest from the charging magnet.

5. The meter structure for reducing magnetic interference according to claim 1, characterized in that, At least two charging magnets are provided, symmetrically arranged along the geometric center of the casing base, and the horizontal distance from each charging magnet to the geomagnetic sensor is equal.

6. The meter structure for reducing magnetic interference according to claim 1, characterized in that, The anti-magnetic interference shield is made of a high magnetic permeability material.

7. The meter structure for reducing magnetic interference according to claim 6, characterized in that, The anti-magnetic interference shield is made of high-nickel alloy.

8. The meter structure for reducing magnetic interference according to claim 1, characterized in that, The thickness of the anti-magnetic interference shield is 0.15 mm.

9. The meter structure for reducing magnetic interference according to claim 1, characterized in that, The anti-magnetic interference shield is attached to the surface of the charging magnet with adhesive.

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