Electromagnetic shielding structure of three-dimensional magnetic sensor

Abstract

The utility model discloses a three-dimensional magnetic sensor electromagnetic shielding structure, which comprises a circuit board and mounting battens, a shielding case made of magnetic shielding materials is arranged at the top of the circuit board, positioning battens are fixedly connected to two sides of the shielding case on the circuit board, and clamping plates are fixedly connected to the bottoms of two sides of the shielding case. First open grooves for containing the mounting battens are formed in the tops of the two sets of positioning battens, second open grooves for clamping the clamping plates are formed in the two sets of positioning battens, the two sets of clamping plates are clamped into the two sets of second open grooves correspondingly, and the two sets of mounting battens are detachably connected into the first open grooves of the two sets of positioning battens correspondingly; the shielding case has the beneficial effects that the positioning battens, the clamping plates and the mounting battens are matched to detachably mount the shielding case, and compared with a fixing mode of welding the shielding case on a circuit board, the problem that potential damage may be caused to a three-dimensional magnetic sensor or other electronic components due to the fact that the shielding case needs to be heated when the shielding case is dismounted is solved.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic shielding structure technology, and in particular to an electromagnetic shielding structure for a three-dimensional magnetic sensor. Background Technology

[0002] A three-dimensional magnetic sensor is a device that can detect the magnetic field strength on the x, y, and z axes. It can measure three-dimensional, linear, angular, and rotational motions and transmit data through an output interface. In practical applications, there are often various electromagnetic interference sources around the three-dimensional magnetic sensor. These interference signals may affect the sensor's accurate measurement of the target magnetic field. Therefore, an electromagnetic shield is usually installed on the outside of the three-dimensional sensor.

[0003] Currently, electromagnetic shielding covers are usually fixed by directly soldering them to the circuit board. Although this installation method can ensure that the electromagnetic shielding cover is firmly fixed to the circuit board, when it is necessary to maintain or replace the three-dimensional magnetic sensor, the electromagnetic shielding cover must be removed by heating. The disassembly process may cause potential damage to the three-dimensional magnetic sensor or other electronic components.

[0004] Therefore, a three-dimensional electromagnetic shielding structure for a magnetic sensor is proposed. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] In view of the problems of the electromagnetic shielding structure of the three-dimensional magnetic sensor mentioned above, this utility model is proposed.

[0007] To solve the above technical problems, this utility model provides the following technical solution: a three-dimensional magnetic sensor electromagnetic shielding structure, including a circuit board and mounting strips, wherein a shielding cover made of magnetic shielding material is provided on the top of the circuit board, positioning strips are fixedly connected to both sides of the shielding cover on the circuit board, and clamping plates are fixedly connected to the bottom of both sides of the shielding cover.

[0008] Both sets of positioning strips have a first slot at the top to accommodate the mounting strips, and both sets of positioning strips have a second slot for engaging the mounting plates. The mounting plates are respectively engaged in the two sets of second slots. The mounting strips are detachably connected to the first slots of the two sets of positioning strips, and the bottoms of the two sets of mounting strips press down on the two sets of mounting plates.

[0009] As a preferred embodiment of the electromagnetic shielding structure for a three-dimensional magnetic sensor described in this utility model, the following features are provided: a first movable cavity is provided on the inner side of each of the two sets of mounting strips; a sliding strip is vertically slidably arranged in each of the two sets of first movable cavities; multiple sets of U-shaped pressure plates made of thermally conductive material are arranged between the two sets of sliding strips; an opening is provided at the top of each of the two sets of mounting strips for the multiple sets of U-shaped pressure plates to pass through; both ends of the multiple sets of U-shaped pressure plates pass through the two sets of openings and are fixedly connected to the two sets of sliding strips; a spring is provided above each of the two sets of sliding strips to elastically abut against the sliding strips; the spring is fixedly connected to the side wall of the movable cavity; and the shielding cover is located inside the multiple sets of U-shaped pressure plates, with the top of the shielding cover fitting against the multiple sets of U-shaped pressure plates.

[0010] In a preferred embodiment of the electromagnetic shielding structure for a three-dimensional magnetic sensor described in this utility model, multiple sets of U-shaped pressure plates are equidistantly arranged, and each set of U-shaped pressure plates has chamfers on both sides of its top.

[0011] As a preferred embodiment of the electromagnetic shielding structure for a three-dimensional magnetic sensor described in this utility model, the positioning plate has positioning slots on both sides of the first slot, a fixed locking block is fixedly connected to one side of the mounting plate, and a movable locking block that can be retracted into the mounting plate is provided on the other side. The movable locking block and the fixed locking block are respectively inserted into the two sets of positioning slots, and the movable locking block abuts against the groove wall of the positioning slot. The length difference between the first slot and the mounting plate is greater than the thickness of the fixed locking block.

[0012] As a preferred embodiment of the electromagnetic shielding structure for a three-dimensional magnetic sensor described in this utility model, the mounting strip has a second movable cavity on the side near the movable block, and a slider is horizontally slidably disposed in the second movable cavity. The mounting strip also has a through hole communicating with the second movable cavity on the side near the movable block. The movable block is fixedly connected to the slider and extends out of the through hole. A spring abuts against the side of the slider facing away from the movable block. The end of the spring away from the slider abuts against the wall of the second movable cavity. A lever is fixedly connected to the top of the slider. A sliding hole for the lever to slide horizontally is opened on the top of the mounting strip, and the lever passes through the sliding hole.

[0013] The beneficial effects of this utility model are:

[0014] 1. By setting up positioning strips, clamps, and mounting strips to work together, the shielding cover can be detachably installed. Compared with the method of fixing the shielding cover by soldering it to the circuit board, this solves the problem that heating is required when removing the shielding cover, and the disassembly process may cause potential damage to the three-dimensional magnetic sensor or other electronic components.

[0015] 2. By setting multiple sets of U-shaped pressure plates that elastically abut against the shielding cover, the fixing effect of the shielding cover is further enhanced, and the heat dissipation area of ​​the shielding cover is increased, which helps to prevent the three-dimensional magnetic sensor from overheating. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0017] Figure 1 This is a three-dimensional structural diagram of the electromagnetic shielding structure of a three-dimensional magnetic sensor according to the present invention.

[0018] Figure 2 This is a partial three-dimensional cross-sectional view of the electromagnetic shielding structure of a three-dimensional magnetic sensor according to this utility model.

[0019] Figure 3 This is a schematic diagram of the shielding cover of the electromagnetic shielding structure of a three-dimensional magnetic sensor according to the present invention, in the installation state.

[0020] Figure descriptions: 1. Circuit board; 2. Shielding cover; 3. Positioning strip; 4. Clamping plate; 5. Mounting strip; 6. Sliding strip; 7. U-shaped pressure plate; 8. Spring; 9. Slider; 10. Spring; 11. Moving clamping block; 12. Pulling block; 13. Fixed clamping block. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0024] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0025] Reference Figures 1-3 This invention provides an embodiment of a three-dimensional magnetic sensor electromagnetic shielding structure, comprising a circuit board 1 and mounting strips 5. A shielding cover 2 made of magnetic shielding material is provided on the top of the circuit board 1. In use, placing the three-dimensional magnetic sensor below the shielding cover 2 achieves electromagnetic shielding. The electromagnetic shielding cover is prior art and will not be described in detail. Positioning strips 3 are fixedly connected to both sides of the shielding cover 2 on the circuit board 1. Clamping plates 4 are fixedly connected to the bottom of both sides of the shielding cover 2. The tops of both sets of positioning strips 3 have openings for receiving... The first slot of the mounting strip 5 is provided, and the second slot of the two sets of positioning strips 3 is provided with the snap-fit ​​plate 4. The two sets of snap-fit ​​plates 4 are snapped into the two sets of second slots respectively. The two sets of second slots here serve to position the shielding cover 2. The two sets of mounting strips 5 are detachably connected to the first slots of the two sets of positioning strips 3 respectively. The bottom of the two sets of mounting strips 5 presses down on the two sets of snap-fit ​​plates 4 respectively. The shielding cover 2 can be lifted and removed by removing the two sets of mounting strips 5. Compared with welding and fixing, the disassembly process has no impact on the three-dimensional magnetic sensor and other electronic components.

[0026] Specifically, positioning slots are provided on both sides of the first slot of the positioning strip 3. A fixed locking block 13 is fixedly connected to one side of the mounting strip 5, and a movable locking block 11 that can be retracted into the mounting strip 5 is provided on the other side. The movable locking block 11 and the fixed locking block 13 are respectively inserted into the two sets of positioning slots. The movable locking block 11 abuts against the groove wall of the positioning slot. The length difference between the first slot and the mounting strip 5 is greater than the thickness of the fixed locking block 13.

[0027] More specifically, a second movable cavity is provided on the side of the mounting strip 5 near the movable block 11. A slider 9 is horizontally slidably arranged in the second movable cavity. A through hole communicating with the second movable cavity is also provided on the side of the mounting strip 5 near the movable block 11. The movable block 11 is fixedly connected to the slider 9 and extends out of the through hole. A spring 10 is abutted on the side of the slider 9 facing away from the movable block 11. The end of the spring 10 away from the slider 9 abuts against the wall of the second movable cavity. A lever 12 is also fixedly connected to the top of the slider 9. A sliding hole for the lever 12 to slide horizontally is provided on the top of the mounting strip 5. The lever 12 passes through the sliding hole.

[0028] like Figure 2As shown, each of the two sets of mounting strips 5 has a first movable cavity on its inner side. Each of the two sets of first movable cavities has a sliding strip 6 vertically slidably installed inside. Between the two sets of sliding strips 6, there are multiple sets of U-shaped pressure plates 7 made of heat-conducting material. Each of the two sets of mounting strips 5 has an opening at its top for the multiple sets of U-shaped pressure plates 7 to pass through. The two ends of the multiple sets of U-shaped pressure plates 7 pass through the two openings respectively and are fixedly connected to the two sets of sliding strips 6. Each of the two sets of sliding strips 6 has a spring 8 that elastically abuts against the sliding strips 6. The spring 8 is fixedly connected to the side wall of the movable cavity. The spring 8 is used to make the multiple sets of U-shaped pressure plates 7 elastically press against the shielding cover 2, so that the U-shaped pressure plates 7 and the shielding cover 2 fit tightly together. The shielding cover 2 is located inside the multiple sets of U-shaped pressure plates 7 and the top of the shielding cover 2 fits against the multiple sets of U-shaped pressure plates 7. The cooperation of the multiple sets of U-shaped pressure plates 7 and the spring 8 can not only further enhance the fixing effect of the shielding cover 2, but also increase the heat dissipation area of ​​the shielding cover 2.

[0029] Specifically, multiple sets of U-shaped pressure plates 7 are equidistantly arranged, and each set of U-shaped pressure plates 7 has chamfers on both sides of its top. The chamfers are to prevent the edges of the U-shaped pressure plates 7 from being too sharp, which could cause scratches to the operators during disassembly.

[0030] Working principle: When installing the shielding cover 2, as shown in the positioning strip 3, first insert the two sets of clamping plates 4 on the shielding cover 2 into the second slots on the two sets of shielding covers 2 respectively. Move the two sets of levers 12 so that the two sets of levers 12 drive the two sets into the second movable cavity respectively. As shown in the shielding cover 2, place the two sets of fixed clamping blocks 13 into the two sets of positioning slots respectively. Then, place the two sets of movable clamping blocks 11 directly into the other two sets of positioning slots respectively. Release the two sets of levers 12. Under the push of the two sets of springs 10, the two sets of movable clamping blocks 11 extend and are respectively inserted into the corresponding positioning slots. At this time, the bottom of the installation strip 5 presses down on the two sets of clamping plates 4, and the shielding cover 2 is installed.

[0031] When installing the mounting strip 5, as each set of U-shaped pressure plates 7 adheres to the top of the shielding cover 2, and the mounting strip 5 is moved further into the first slot, the sliding strip 6 will move upward relative to the first movable cavity, and the pressure of the spring plate 8 on the sliding strip 6 will increase, thereby making the U-shaped pressure plates 7 tightly adhere to the top of the shielding cover 2. While the multiple sets of U-shaped pressure plates 7 further fix the shielding cover 2, they can also increase the heat dissipation area of ​​the shielding cover 2 and protect the shielding cover 2.

[0032] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An electromagnetic shielding structure for a three-dimensional magnetic sensor, characterized in that: Includes a circuit board (1) and mounting strips (5). The top of the circuit board (1) is provided with a shielding cover (2) made of magnetic shielding material. Positioning strips (3) are fixedly connected to both sides of the circuit board (1) and the bottom of both sides of the shielding cover (2) are fixedly connected with clamping plates (4). Both sets of positioning strips (3) have a first slot at the top to accommodate the mounting strips (5), and both sets of positioning strips (3) have a second slot for engaging the mounting plates (4). The mounting plates (4) are engaged in the two sets of second slots respectively. The mounting strips (5) are detachably connected to the first slots of the two sets of positioning strips (3). The bottoms of the two sets of mounting strips (5) press against the mounting plates (4) respectively.

2. The electromagnetic shielding structure for a three-dimensional magnetic sensor according to claim 1, characterized in that: Both sets of mounting strips (5) have a first movable cavity on their inner side. Both sets of first movable cavities have a sliding strip (6) vertically slidably arranged inside. Between the two sets of sliding strips (6) are multiple sets of U-shaped pressure plates (7) made of heat-conducting material. Both sets of mounting strips (5) have an opening at the top for the multiple sets of U-shaped pressure plates (7) to pass through. Both ends of the multiple sets of U-shaped pressure plates (7) pass through the two sets of openings and are fixedly connected to the two sets of sliding strips (6). Both sets of sliding strips (6) have a spring (8) that elastically abuts against the sliding strips (6) above them. The spring (8) is fixedly connected to the side wall of the movable cavity. The shield (2) is located inside the multiple sets of U-shaped pressure plates (7) and the top of the shield (2) is in contact with the multiple sets of U-shaped pressure plates (7).

3. The electromagnetic shielding structure for a three-dimensional magnetic sensor according to claim 2, characterized in that: The multiple sets of U-shaped pressure plates (7) are equidistantly arranged, and each set of U-shaped pressure plates (7) has chamfers on both sides of its top.

4. The electromagnetic shielding structure for a three-dimensional magnetic sensor according to any one of claims 1 to 3, characterized in that: Positioning slots are provided on both sides of the first slot of the positioning strip (3). A fixed locking block (13) is fixedly connected to one side of the mounting strip (5), and a movable locking block (11) that can be retracted into the mounting strip (5) is provided on the other side. The movable locking block (11) and the fixed locking block (13) are respectively inserted into the two sets of positioning slots. The movable locking block (11) abuts against the groove wall of the positioning slot. The length difference between the first slot and the mounting strip (5) is greater than the thickness of the fixed locking block (13).

5. The electromagnetic shielding structure for a three-dimensional magnetic sensor according to claim 4, characterized in that: The mounting strip (5) has a second movable cavity on the side near the movable block (11). A slider (9) is horizontally slidably arranged in the second movable cavity. The mounting strip (5) also has a through hole communicating with the second movable cavity on the side near the movable block (11). The movable block (11) is fixedly connected to the slider (9) and extends out of the through hole. A spring (10) abuts against the side of the slider (9) facing away from the movable block (11). The end of the spring (10) away from the slider (9) abuts against the wall of the second movable cavity. A lever (12) is fixedly connected to the top of the slider (9). A sliding hole for the lever (12) to slide horizontally is opened on the top of the mounting strip (5). The lever (12) passes through the sliding hole.

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