Coil polarity detection jig

Abstract

The utility model belongs to the technical field of detection jigs, and particularly relates to a coil polarity detection jig, which comprises a detection seat, a detection cavity is arranged on the detection seat, the opening of the detection cavity is upward, and the detection cavity is circular. A circular magnet is arranged in the detection base and located below the detection cavity, and the center of the circular magnet and the center of the detection cavity are located on the same straight line. A to-be-detected coil is placed in the detection cavity in a manner that the front surface and the back surface of the to-be-detected coil are divided, the positive electrode and the negative electrode of a power supply are connected with the lead wires at the two ends of the coil, the coil is electrified to generate magnetism and reacts with the circular magnet in the detection seat, and the circular magnet and the electrified coil repel each other in like polarity and attract each other in opposite polarity; when the coil is electrified, the coil does not abut against the bottom of the detection cavity any more, the polarity of the coil is correct at the moment, whether the coil is broken due to damage or not can be detected in the electrifying process, and the coil polarity detection jig can be used for rapidly, accurately and reliably detecting the polarity of the coil.

Description

Technical Field

[0001] The utility model belongs to the technical field of detection jigs, and in particular relates to a coil polarity detection jig. Background Art

[0002] With the miniaturization and intelligent development of electronic devices, the requirements for coil polarity detection are becoming increasingly stringent. Coils play a key role in various electronic components, such as mobile phones, computers, and automotive electronics. Incorrect coil polarity can lead to product performance degradation or even damage, making accurate, fast, and reliable polarity detection crucial to ensuring proper device operation. Existing methods for coil polarity detection primarily rely on the AC method. This involves connecting the primary and secondary coils of a current transformer, passing alternating current through the secondary coil, and observing the deflection of the meter needle to determine polarity. However, during coil production in factories, workers may not necessarily understand the principles of the AC method. Therefore, using the AC method for detection suffers from drawbacks such as inconvenience, low efficiency, low accuracy, and proneness to errors. Therefore, a simple, efficient, reliable, and low-cost coil polarity detection jig is urgently needed to meet the coil polarity detection requirements of the electronic equipment manufacturing industry. This jig should be able to quickly and accurately detect coil polarity and be compatible with automated production lines. The present invention enables fast, accurate, and reliable coil polarity detection, meeting the production line's requirements for coil detection efficiency and accuracy. Utility Model Content

[0003] The purpose of the utility model is to provide a coil polarity detection jig, aiming to solve the technical problems of the AC method of coil polarity detection in the prior art, such as inconvenient operation, low efficiency, low precision, and easy error.

[0004] To achieve the above objectives, the present invention provides a coil polarity detection jig comprising a detection base, a circular detection cavity with an upward-facing opening, and a circular magnet positioned within the base, positioned below the detection cavity, with the center of the magnet aligned with the center of the cavity.

[0005] Furthermore, the detection base is provided with a power supply slot, one end of which is connected to the detection cavity and the other end of which extends outside the detection base. The power supply slot is also provided with two metal conductive plates, which are respectively arranged at the left and right ends of the power supply slot and are connected to the positive and negative poles of the power supply respectively.

[0006] Furthermore, a partition is provided on the power-conducting slot. The partition is vertically arranged in the power-conducting slot and is located between the two metal conductive sheets for separating the two metal conductive sheets.

[0007] Furthermore, a mounting cavity is provided below the detection seat, the mounting cavity opening is downward and the mounting cavity is circular, and the circular magnet is arranged in the mounting cavity.

[0008] Furthermore, the detection seat is provided with a plurality of positioning holes, each positioning hole passes through the detection seat, and the circular array of the positioning holes is outside the detection cavity.

[0009] Furthermore, the invention further comprises a cover plate, one end of which is hinged to one side of the detection seat, and the cover plate rotates around the hinge point between the cover plate and the detection seat to cover or open the detection cavity.

[0010] Furthermore, the cover is provided with a laser rangefinder and a pressing block. When the cover is pressed against the detection cavity, the pressing block cooperates with the energized slot, and the laser rangefinder is used to measure the distance between the cover and the object in the detection cavity.

[0011] The above one or more technical solutions in the coil polarity detection jig provided by the embodiment of the present invention have at least one of the following technical effects: the coil to be detected is placed in the detection cavity with the front and back sides separated, and the leads at both ends of the coil are connected with the positive and negative poles of the power supply. At this time, the coil is energized to generate magnetism, which reacts with the circular magnet in the detection seat. The circular magnet and the magnetic poles of the energized coil repel each other with like poles and attract each other with opposite poles. When the polarity of the coil is correct, it will repel the circular magnet and no longer abut the bottom of the detection cavity. At this time, the polarity of the coil is correct. During the power-on process, it can also be detected whether the coil is damaged and disconnected. The use of the coil polarity detection jig provided by the present invention can quickly, accurately and reliably detect the polarity of the coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0013] Figure 1 A top view of a coil polarity detection jig provided in an embodiment of the present utility model.

[0014] Figure 2 A bottom view of a coil polarity detection jig provided in an embodiment of the present utility model.

[0015] Figure numerals: 10, detection seat; 11, detection cavity; 12, circular magnet; 13, power supply slot; 14, metal conductive sheet; 15, partition; 16, installation cavity; 17, positioning hole; 20, cover plate; 21, laser rangefinder; 22, pressing block. DETAILED DESCRIPTION

[0016] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0017] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0018] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0019] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium; internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0020] In one embodiment of the present invention, reference Figures 1 and 2As shown, a coil polarity detection jig is provided, including a detection base 10. The detection base 10 is provided with a detection cavity 11, the opening of the detection cavity 11 facing upward, and the detection cavity 11 is circular. A circular magnet 12 is provided in the detection base 10, and the circular magnet 12 is located below the detection cavity 11. The center of the circular magnet 12 and the center of the detection cavity 11 are located on the same straight line. In this embodiment, the coil to be tested is placed in the detection cavity 11 with its front and back sides separated. The leads at both ends of the coil are connected with the positive and negative poles of the power supply. At this time, the coil is energized to generate magnetism, which reacts with the circular magnet 12 in the detection base 10. The magnetic poles of the circular magnet 12 and the energized coil repel each other with like poles, and attract each other with opposite poles. When the polarity of the coil is correct, it will repel the circular magnet 12 and no longer abut the bottom of the detection cavity 11. At this time, the coil polarity is correct. During the power-on process, it can also be detected whether the coil is damaged and disconnected. The coil polarity detection jig provided by the utility model can be used to quickly, accurately, and reliably detect the polarity of the coil.

[0021] Specifically, refer to Figures 1 and 2 As shown, the detection seat 10 is also provided with a power-on slot 13, one end of which is connected to the detection cavity 11, and the other end of the power-on slot 13 extends to the outside of the detection seat 10. The power-on slot 13 is also provided with two metal conductive sheets 14, which are respectively arranged at the left and right ends of the power-on slot 13, and the two metal conductive sheets 14 are respectively connected to the positive and negative poles of the power supply. In this embodiment, metal conductive sheets 14 with positive and negative poles are provided in the power-on slot 13. After the coil is placed in the detection cavity 11, the two leads of the coil are respectively contacted with the two metal conductive sheets 14, and then the power is turned on. When the polarity of the coil is correct, it will repel the circular magnet 12 and no longer abut the bottom of the detection cavity 11. At this time, the polarity of the coil is correct. During the power-on process, it can also be detected whether the coil is damaged and disconnected. At the same time, there is no need to manually touch the coil leads and power supply, and the operation is simpler and faster.

[0022] Specifically, refer to Figures 1 and 2 As shown, a partition 15 is further provided on the current channel 13. The partition 15 is vertically disposed within the current channel 13 and is located between the two metal conductive sheets 14 to separate the two metal conductive sheets 14. In this embodiment, the partition 15 is used to separate the two metal conductive sheets 14 to prevent the coil leads from interlacing or contacting both metal conductive sheets 14 simultaneously, thereby affecting the detection effect.

[0023] Specifically, refer to Figures 1 and 2 As shown, a mounting cavity 16 is provided below the detection base 10. The mounting cavity 16 opens downward and is circular. The circular magnet 12 is disposed within the mounting cavity 16. In this embodiment, the circular magnet 12 is disposed within the mounting cavity 16 for easy replacement. When testing different coils, it may be necessary to adjust the polarity orientation of the circular magnet 12, making adjustment of the circular magnet 12 more convenient.

[0024] Specifically, refer to Figures 1 and 2 As shown, the detection base 10 is further provided with a plurality of positioning holes 17, each positioning hole 17 passes through the detection base 10, and the positioning holes 17 are arranged in a circular array outside the detection cavity 11. In this embodiment, the detection base 10 is fixed by the positioning holes 17 to prevent the detection base 10 from shifting.

[0025] More specifically, refer to Figures 1 and 2 As shown, the detection base 10 is fixed by passing a plastic screw through the positioning hole 17 to avoid affecting the circular magnet 12 and the magnetic field generated after the coil is energized.

[0026] Specifically, refer to Figures 1 and 2 As shown, it also includes a cover plate 20, one end of which is hinged to one side of the detection base 10. The cover plate 20 rotates around the hinge point with the detection base 10 to cover or open the detection cavity 11. The cover plate 20 is a transparent plate. In this embodiment, when the coil is placed in the detection cavity 11 and the coil lead contacts the metal conductive sheet 14, the cover plate 20 is covered and then energized, so that the coil will not jump out of the detection cavity 11 when it repels the circular magnet 12, and the jumping action of the coil can be observed through the transparent plate, thereby preventing the coil from jumping out of the detection cavity 11 and scratching the coil surface when jumping.

[0027] Specifically, refer to Figures 1 and 2 As shown, a laser rangefinder 21 is also provided on the cover plate 20, and a pressing block 22 is also provided on the cover plate 20. When the cover plate 20 covers the detection cavity 11, the pressing block 22 cooperates with the power slot 13, and the laser rangefinder 21 is used to measure the distance between the cover plate 20 and the object in the detection cavity 11. In this embodiment, the pressing block 22 is used to press the lead on the metal conductive sheet 14 to prevent the electrical connection between the lead and the metal conductive sheet 14 from being disconnected when the coil jumps. When the coil is no longer jumping and is in a floating state due to repulsion with the circular coil, the laser rangefinder 21 measures the distance from the coil to the cover plate 20, thereby determining whether the magnetic flux of the coil is qualified. The use of the laser rangefinder 21 prevents the magnetic field emitted by the circular magnet 12 and the coil from affecting the measurement accuracy of the laser rangefinder 21.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A coil polarity detection jig, characterized by: It includes a detection seat, which is provided with a detection cavity, the opening of the detection cavity is upward, and the detection cavity is circular; a circular magnet is provided in the detection seat, the circular magnet is located below the detection cavity, and the center of the circular magnet and the center of the detection cavity are located on the same straight line.

2. The coil polarity detection jig according to claim 1, characterized in that: The detection seat is also provided with a power-on slot, one end of which is connected to the detection cavity, and the other end of which extends to the outside of the detection seat; the power-on slot is also provided with two metal conductive plates, which are respectively arranged at the left and right ends of the power-on slot, and the two metal conductive plates are respectively connected to the positive and negative poles of the power supply.

3. The coil polarity detection jig according to claim 2, characterized in that: The power-conducting slot is further provided with a partition, which is vertically arranged in the power-conducting slot and located between the two metal conductive sheets for separating the two metal conductive sheets.

4. The coil polarity detection jig according to claim 1, characterized in that: A mounting cavity is provided below the detection seat. The mounting cavity opens downward and is circular. The circular magnet is arranged in the mounting cavity.

5. The coil polarity detection jig according to claim 4, characterized in that: The detection seat is further provided with a plurality of positioning holes, each of which passes through the detection seat, and the ring array of each of the positioning holes is located outside the detection cavity.

6. The coil polarity detection jig according to claim 2, characterized in that: It also includes a cover plate, one end of which is hinged to one side of the detection seat. The cover plate rotates around the hinge point between the cover plate and the detection seat to cover or open the detection cavity; the cover plate is a transparent plate.

7. The coil polarity detection jig according to claim 6, characterized in that: The cover plate is also provided with a laser rangefinder and a pressing block; when the cover plate covers the detection cavity, the pressing block cooperates with the power-on slot, and the laser rangefinder is used to measure the distance between the cover plate and the object in the detection cavity.

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