Current transformer and current transformer assembly

Abstract

The utility model relates to a current transformer and a current transformer assembly. The current transformer is used for a circuit board, and a clamping hole is formed in the circuit board; the current transformer comprises a transformer body; the clamping structure is arranged on the mutual inductor body; wherein the clamping structure comprises two clamping pieces which are arranged at an interval, each clamping piece comprises a penetrating part and a limiting part which are connected, the limiting parts are located on the sides, away from the mutual inductor body, of the penetrating parts, and the penetrating parts are used for being arranged in the clamping holes in a penetrating mode; in the thickness direction of the circuit board, at least part of the orthographic projection of the limiting part is located on the outer side of the outer contour of the orthographic projection of the clamping hole. Therefore, according to the current transformer and the current transformer assembly provided by the invention, the connection stability of the current transformer and the circuit board can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of current transformers, in particular to a current transformer and a current transformer assembly. BACKGROUND

[0002] The current transformer is a component that converts a large current on a primary side into a small current on a secondary side for measurement according to the principle of electromagnetic induction.

[0003] In the related art, the current transformer assembly can include a circuit board and a current transformer. The circuit board is provided with a current measurement circuit. The current transformer can include a closed magnetic core and an enameled wire. The enameled wire is wound on the magnetic core. The enameled wire is provided with conductive pins at two ends respectively. The conductive pins are electrically connected with the circuit board, so as to realize the electrical connection between the current measurement circuit and the current transformer. However, the connection stability of the current transformer and the circuit board needs to be improved. UTILITY MODEL CONTENT

[0004] Therefore, it is necessary to provide a current transformer and a current transformer assembly, which can improve the connection stability of the current transformer and the circuit board.

[0005] In a first aspect, an embodiment of the present application provides a current transformer for a circuit board, the circuit board being provided with a clamping hole; the current transformer comprising:

[0006] a transformer body;

[0007] a clamping structure provided on the transformer body;

[0008] The clamping structure comprises two clamping pieces arranged at intervals. The clamping piece comprises a penetrating portion and a limiting portion connected with each other. The limiting portion is located on the side of the penetrating portion away from the transformer body. The penetrating portion is used for penetrating into the clamping hole. In the thickness direction of the circuit board, at least part of the orthogonal projection of the limiting portion is located outside the orthogonal projection of the clamping hole.

[0009] The current transformer provided by the embodiment of the present application can prevent the clamping structure from exiting the clamping hole in the direction from the limiting portion to the penetrating portion when the current transformer and the circuit board are in an assembled state, thereby facilitating the improvement of the connection stability between the current transformer and the circuit board.

[0010] In one of the embodiments, the two clamping pieces are defined as a first clamping piece and a second clamping piece. The penetrating portion and the limiting portion of the first clamping piece are respectively a first penetrating portion and a first limiting portion. The penetrating portion and the limiting portion of the second clamping piece are respectively a second penetrating portion and a second limiting portion.

[0011] In the thickness direction of the circuit board, the orthogonal projection of the first limiting portion is a first orthogonal projection, the orthogonal projection of the second limiting portion is a second orthogonal projection, and the orthogonal projection of the clamping hole is a third orthogonal projection.

[0012] The at least partial first projection and the at least partial second projection are respectively located on two sides of an outer contour of the third projection.

[0013] In one of the embodiments, the first limiting part comprises a first surface facing away from the second limiting part, and the second limiting part comprises a second surface facing away from the first limiting part.

[0014] The distance between the first surface and the second surface gradually decreases in a direction from the first penetrating part to the first limiting part.

[0015] In one of the embodiments, the first limiting part comprises a third surface facing away from the second limiting part, the third surface is located on a side of the first surface facing the first penetrating part and connected with the first surface, and the second limiting part comprises a fourth surface facing away from the first limiting part, the fourth surface is located on a side of the second surface facing the second penetrating part and connected with the second surface.

[0016] The distance between the third surface and the fourth surface gradually increases in a direction from the first penetrating part to the first limiting part.

[0017] In one of the embodiments, the first penetrating part comprises a fifth surface facing away from the second penetrating part, the fifth surface is an arc surface, the fifth surface is convexly arranged in a direction facing away from the second penetrating part, and part of the hole wall of the clamping hole is attached to the fifth surface.

[0018] And / or, the second penetrating part comprises a sixth surface facing away from the first penetrating part, the sixth surface is an arc surface, the sixth surface is convexly arranged in a direction facing away from the first penetrating part, and part of the hole wall of the clamping hole is attached to the sixth surface.

[0019] And / or, the first clamping piece comprises a seventh surface facing the second clamping piece, the seventh surface is an arc surface, and the seventh surface is concavely arranged in a direction facing away from the second clamping piece.

[0020] And / or, the second clamping piece comprises an eighth surface facing the first clamping piece, the eighth surface is an arc surface, and the eighth surface is concavely arranged in a direction facing away from the first clamping piece.

[0021] In one of the embodiments, the clamping hole comprises a first sub-hole and two second sub-holes, the two second sub-holes are respectively located on two sides of the first sub-hole and communicate with the first sub-hole, and the penetrating parts of the two clamping pieces are correspondingly arranged in the two second sub-holes and used for penetrating into the corresponding second sub-holes.

[0022] In the thickness direction of the circuit board, the size of the projection of the first sub-hole along a direction perpendicular to the first sub-hole to the second sub-hole is a first size, the size of the projection of the second sub-hole along the direction perpendicular to the first sub-hole to the second sub-hole is a second size, and the size of the projection of the limiting part along the direction perpendicular to the first sub-hole to the second sub-hole is a third size, the first size is greater than the second size, the third size is greater than the second size, and smaller than the first size.

[0023] In one of the embodiments, the current transformer comprises a first mounting member and a reset member, both of which are arranged outside the transformer body;

[0024] The first clamping member comprises a first matching portion, which is located on the side of the first penetrating portion away from the first limiting portion and is movably connected with the first mounting member in the direction from the first clamping member to the second clamping member; the second clamping member comprises a second matching portion, which is located on the side of the second penetrating portion away from the second limiting portion and is connected with the first mounting member;

[0025] The reset member is connected with the first matching portion and is used to drive the first matching portion to move in the direction away from the second matching portion.

[0026] In one of the embodiments, the current transformer comprises an operating member, which is arranged outside the transformer body and is movably connected with the first mounting member in the direction from the first clamping member to the second clamping member;

[0027] The operating member comprises a connecting portion and an operating portion, and the connecting portion is connected with the first matching portion;

[0028] In addition, the reset member is an elastic member, which is arranged between the first matching portion and the second matching portion and is in a compressed state;

[0029] In addition, the current transformer comprises a plurality of reinforcing members, all of which are connected to the side of the first mounting member away from the clamping structure and are arranged in the direction from the first clamping member to the second clamping member.

[0030] In one of the embodiments, the transformer body comprises a shell, a magnetic core, a winding wire, two conductive pins and a second mounting member, the winding wire is wound around the magnetic core, the conductive pin comprises a first sub-portion, a second sub-portion and a third sub-portion connected in sequence, and the two first sub-portions are connected to the two ends of the winding wire respectively; the second sub-portion penetrates through the second mounting member, and the first sub-portion and the third sub-portion are located on the two sides of the second mounting member respectively.

[0031] The shell is provided with a mounting groove, the mounting groove comprises a first sub-mounting groove and a second sub-mounting groove connected in communication, the magnetic core is arranged in the first sub-mounting groove, the second mounting member is arranged in the second sub-mounting groove, an abutting member is arranged between the first sub-mounting groove and the second sub-mounting groove, part of the second mounting member abuts on the side of the bottom wall of the mounting groove away from the abutting member, and the first sub-portion and part of the winding wire are located between the second mounting member and the bottom wall of the second sub-mounting groove.

[0032] In the second aspect, the embodiments of the present application provide a current transformer assembly, which comprises a circuit board and the current transformer of the first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 A structural schematic diagram of a current transformer provided for an embodiment of the present application.

[0034] Figure 2 Another structural schematic diagram of a current transformer provided for an embodiment of the present application.

[0035] Figure 3 A structural schematic diagram of a current transformer provided for an embodiment of the present application without glue filling.

[0036] Figure 4 A structural schematic diagram of a shell, a clamping structure and a first mounting member provided for an embodiment of the present application.

[0037] Figure 5 Another structural schematic diagram of a current transformer provided for an embodiment of the present application.

[0038] Figure 6 A structural schematic diagram of a magnetic core, a winding wire, a second mounting member and a conductive pin provided for an embodiment of the present application.

[0039] Figure 7 A structural schematic diagram of a magnetic core and a winding wire provided for an embodiment of the present application.

[0040] Figure 8 Another structural schematic diagram of a magnetic core and a winding wire provided for an embodiment of the present application.

[0041] Figure 9 A sectional view of a magnetic core and a winding wire provided for an embodiment of the present application.

[0042] Legend of reference signs:

[0043] 100, current transformer; 101, clamping structure; 110, clamping member; 111, first clamping member; 112, second clamping member; 113, limiting portion; 1131, first limiting portion; 1132, second limiting portion; 114, penetrating portion; 1141, first penetrating portion; 1142, second penetrating portion; 1151, first face; 1152, second face; 1153, third face; 1154, fourth face; 1155, fifth face; 1156, sixth face; 1157, seventh face; 1158, eighth face; 121, first mounting member; 122, reinforcing member; 102, transformer body; 130, shell; 132, mounting groove; 1321, first sub-mounting groove; 1322, second sub-mounting groove; 140, magnetic core; 150, winding wire; 160, conductive pin; 161, first sub-portion; 163, third sub-portion; 172, second mounting member; 1721, abutting face; 173, abutting member; 174, sealing member. DETAILED DESCRIPTION

[0044] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0045] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0046] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0050] In related technologies, a current transformer assembly may include a circuit board and a current transformer. The circuit board is provided with a current measuring circuit. The current transformer may include a closed magnetic core and an enameled wire. The enameled wire is wound on the magnetic core, and conductive pins are respectively provided at both ends of the enameled wire. The conductive pins are electrically connected to the circuit board, thereby realizing the electrical connection between the current measuring circuit and the current transformer. The current transformer is mounted on the circuit board through the conductive pins.

[0051] However, by simply mounting the current transformer onto the circuit board via conductive pins, without any other connection structure on the current transformer to connect it to the circuit board, the connection stability between the current transformer and the circuit board is poor.

[0052] To address the aforementioned issues, this application provides a current transformer and a current transformer assembly, which can improve the connection stability between the current transformer and the circuit board.

[0053] The following will combine Figures 1-9 The current transformer 100 and current transformer assembly provided in the embodiments of this application will be described.

[0054] This application provides a current transformer assembly, which can be used, for example, in an electric motorcycle. The current transformer assembly may include a circuit board and a current transformer 100, which can be used to measure the current magnitude of a conductor under test. The conductive pin 160 of the current transformer 100 (… Figure 2 It can be electrically connected to the circuit board.

[0055] For example, a current measuring circuit is provided on the circuit board, and the current transformer 100 is electrically connected to the current measuring circuit. The conductive pin 160 can output an induced current, and the current measuring circuit is configured to obtain the magnitude of the current in the conductor under test based on the current on the conductive pin 160.

[0056] For example, the circuit board has a socket, and the conductive pin 160 is inserted into the socket.

[0057] In some embodiments, the circuit board is provided with snap-fit ​​holes for engagement with the snap-fit ​​structure 101 of the current transformer 100. Figure 1 The circuit board and the current transformer 100 are snapped together by snap-fit ​​holes and snap-fit ​​structure 101, which helps to improve the connection stability between the current transformer 100 and the circuit board. For example, when the current transformer assembly is used in an electric motorcycle, it helps to improve the shock absorption performance of the current transformer 100.

[0058] The current transformer 100 provided in the embodiments of this application will be described below.

[0059] See Figure 1 and Figure 4 This application provides a current transformer 100, which can be used on a circuit board. The current transformer 100 includes a transformer body 102 and a snap-fit ​​structure 101, which is disposed on the transformer body 102. The snap-fit ​​structure 101 includes two snap-fit ​​members 110 spaced apart. Each snap-fit ​​member 110 includes a connected through-hole portion 114 and a limiting portion 113. The limiting portion 113 is located on the side of the through-hole portion 114 opposite to the transformer body 102, and the through-hole portion 114 is used to pass through the snap-fit ​​hole. Along the thickness direction of the circuit board, at least a portion of the orthographic projection of the limiting portion 113 is located outside the orthographic projection outer contour of the snap-fit ​​hole. Thus, when the current transformer 100 and the circuit board are in an assembled state, the limiting portion 113 can be used to prevent the snap-fit ​​structure 101 from exiting the snap-fit ​​hole along the direction from the limiting portion 113 to the through-hole portion 114, thereby improving the connection stability between the current transformer 100 and the circuit board. When the current transformer 100 and the circuit board are in the assembled state, the limiting part 113 and the first mounting part 121 can be located on both sides of the circuit board thickness direction, respectively.

[0060] In some embodiments, see Figure 4 and Figure 5Two latching members 110 are defined as a first latching member 111 and a second latching member 112, which can be arranged opposite to each other along a first direction X. The through-hole portion 114 and the limiting portion 113 of the first latching member 111 are respectively a first through-hole portion 1141 and a first limiting portion 1131, and the through-hole portion 114 and the limiting portion 113 of the second latching member 112 are respectively a second through-hole portion 1142 and a second limiting portion 1132. For example, the first limiting portion 1131 and the second limiting portion 1132 are arranged opposite to each other along the first direction X. The first through-hole portion 1141 and the second through-hole portion 1142 are also arranged opposite to each other along the first direction X.

[0061] In some embodiments, along the thickness direction of the circuit board, the orthographic projection of the first limiting portion 1131 is a first orthographic projection, the orthographic projection of the second limiting portion 1132 is a second orthographic projection, and the orthographic projection of the snap-fit ​​hole is a third orthographic projection. At least a portion of the first orthographic projection and at least a portion of the second orthographic projection are located on both sides of the outer contour of the third orthographic projection (e.g., on both sides of the first direction). Thus, when the current transformer 100 and the circuit board are in an assembled state, the first limiting portion 1131 and the second limiting portion 1132 can better prevent the snap-fit ​​structure 101 from exiting the snap-fit ​​hole along the direction from the limiting portion 113 to the through portion 114, thereby better improving the connection stability between the current transformer 100 and the circuit board.

[0062] See Figure 5 In some embodiments, the first limiting portion 1131 includes a first surface 1151 facing away from the second limiting portion 1132, and the second limiting portion 1132 includes a second surface 1152 facing away from the first limiting portion 1131. The distance between at least a portion of the first surface 1151 and at least a portion of the second surface 1152 along the first direction X is greater than the size of the snap-fit ​​hole along the first direction X. This larger distance between the at least a portion of the first surface 1151 and the at least a portion of the second surface 1152 helps prevent the snap-fit ​​structure 101 from exiting the snap-fit ​​hole along the direction from the limiting portion 113 to the through portion 114 when the current transformer 100 and the circuit board are in an assembled state, thereby improving the connection stability between the current transformer 100 and the circuit board. At this time, along the thickness direction of the circuit board, at least a portion of the orthographic projection of the limiting portion 113 is located outside the orthographic projection outer contour of the snap-fit ​​hole.

[0063] For example, see Figure 5 The distance between the first surface 1151 and the second surface 1152 gradually decreases along the direction from the first through portion 1141 to the first limiting portion 1131. In this way, the first surface 1151 and the second surface 1152 can play a guiding role during the process of inserting the snap-fit ​​structure 101 into the snap-fit ​​hole, which helps to reduce the assembly difficulty of the current transformer 100 and the circuit board.

[0064] In some embodiments, see Figure 5The first limiting portion 1131 includes a third surface 1153 that is opposite to the second limiting portion 1132. The third surface 1153 is located on the side of the first surface 1151 facing the first through portion 1141, and the third surface 1153 is connected to the first surface 1151. The second limiting portion 1132 includes a fourth surface 1154 that is opposite to the first limiting portion 1131. The fourth surface 1154 is located on the side of the second surface 1152 facing the second through portion 1142, and the fourth surface 1154 is connected to the second surface 1152.

[0065] For example, the distance between the third surface 1153 and the fourth surface 1154 gradually increases along the direction from the first through portion 1141 to the first limiting portion 1131. Thus, during the disassembly of the current transformer 100 and the circuit board, the third surface 1153 and the fourth surface 1154 can act as guides, which helps reduce the difficulty of disassembling the current transformer 100 and the circuit board. Alternatively, the distance between the third surface 1153 and the fourth surface 1154 can be the same everywhere along the direction from the first through portion 1141 to the first limiting portion 1131. This makes the shapes of the third surface 1153 and the fourth surface 1154 simpler, reducing the difficulty of manufacturing the third surface 1153 and the fourth surface 1154.

[0066] In some embodiments, see Figure 5 The first through-hole 1141 includes a fifth surface 1155 facing away from the second through-hole 1142, and the second through-hole 1142 includes a sixth surface 1156 facing away from the first through-hole 1141. A portion of the wall of the snap-fit ​​hole is in contact with the fifth surface 1155, and a portion of the wall of the snap-fit ​​hole is in contact with the sixth surface 1156. Both the fifth surface 1155 and the sixth surface 1156 are in contact with the wall of the snap-fit ​​hole, which helps to prevent the snap-fit ​​structure 101 from shaking within the snap-fit ​​hole.

[0067] In some embodiments, the fifth surface 1155 is an arc surface, and the fifth surface 1155 protrudes in a direction away from the second through portion 1142. This helps to increase the area of ​​the fifth surface 1155, so that the contact area between the hole wall of the snap-fit ​​hole and the first snap-fit ​​member 111 is larger, which can better prevent the snap-fit ​​structure 101 from shaking in the snap-fit ​​hole.

[0068] In some embodiments, the sixth surface 1156 is an arc surface, and the sixth surface 1156 protrudes in a direction away from the first through portion 1141. This helps to increase the area of ​​the sixth surface 1156, so that the contact area between the hole wall of the snap-fit ​​hole and the second snap-fit ​​member 112 is larger, which can better prevent the snap-fit ​​structure 101 from shaking in the snap-fit ​​hole.

[0069] It should be noted that both the first snap-fit ​​component 111 and the second snap-fit ​​component 112 can be fixedly connected to the current transformer body 102. The first snap-fit ​​component 111 and the second snap-fit ​​component 112 are stationary components relative to the current transformer body 102. Since the distance between the first surface 1151 and the second surface 1152 is relatively large, during the assembly process of the current transformer 100 and the circuit board, the deformation of the first through-hole 1141 and the second through-hole 1142 can be controlled so that the first surface 1151 and the second surface 1152 can approach each other and pass through the snap-fit ​​hole. After the first surface 1151 and the second surface 1152 have completely passed through the snap-fit ​​hole, the deformation of the first through-hole 1141 and the first through-hole 1141 can be restored, so that the distance between the first surface 1151 and the second surface 1152 increases again, thereby preventing the snap-fit ​​structure 101 from falling out of the snap-fit ​​hole. Alternatively, at least one of the first snap-fit ​​member 111 and the second snap-fit ​​member 112 can be movably disposed relative to the transformer body 102 along the first direction X. In this way, the distance between the first surface 1151 and the second surface 1152 can be adjusted without the first through part 1141 and the second through part 1142 being deformed, thereby realizing the assembly and positioning of the snap-fit ​​structure 101.

[0070] In some embodiments, the first latching member 111 includes a seventh surface 1157 facing the second latching member 112. The seventh surface 1157 is an arc surface and is recessed in a direction away from the second latching member 112. In embodiments where the fifth surface 1155 is an arc surface, the shapes of the fifth surface 1155 and the seventh surface 1157 are matched, which can prevent the thickness of the first through portion 1141 along the first direction X from being too large. This is beneficial to improving the deformation capability of the first through portion 1141 and reducing the assembly difficulty of the current transformer 100 and the circuit board.

[0071] In some embodiments, the second latching member 112 includes an eighth surface 1158 facing the first latching member 111. The eighth surface 1158 is an arc surface and is recessed in a direction away from the first latching member 111. In embodiments where the sixth surface 1156 is an arc surface, the shapes of the sixth surface 1156 and the eighth surface 1158 are matched, which can prevent the thickness of the second through portion 1142 along the first direction X from being too large. This is beneficial to improving the deformation capability of the second through portion 1142 and reducing the assembly difficulty of the current transformer 100 and the circuit board.

[0072] In some embodiments, the snap-fit ​​hole includes a first sub-hole and two second sub-holes, the two second sub-holes being located on both sides of the first sub-hole (e.g., on both sides in the first direction X), and both second sub-holes communicating with the first sub-hole. The through-holes 114 of the two snap-fit ​​members 110 are correspondingly disposed with the two second sub-holes, the through-holes 114 being used to pass through the corresponding second sub-holes; that is, the first through-hole 1141 is used to pass through one of the second sub-holes, and the second through-hole 1142 is used to pass through the other second sub-hole. Along the thickness direction of the circuit board, the orthographic projection of the first sub-hole along the direction perpendicular to the first sub-hole to the second sub-hole (i.e., the second direction Y) is the first dimension; the orthographic projection of the second sub-hole along the direction perpendicular to the first sub-hole to the second sub-hole is the second dimension; and the orthographic projection of the limiting part 113 along the direction perpendicular to the first sub-hole to the second sub-hole is the third dimension. The first dimension is larger than the second dimension, and the third dimension is between the second dimension and the first dimension. Thus, during the assembly process of the snap-fit ​​structure 101 and the snap-fit ​​hole, the first limiting part 1131 and the second limiting part 1131 can be controlled. The first limiting part 1131 and the second limiting part 1132 are brought closer together, allowing them to pass through the first sub-hole. After the first limiting part 1131 and the second limiting part 1132 have completely passed through the first sub-hole, they can move away from each other, and the first passing part 1141 and the second passing part 1142 are respectively located in the two second sub-holes. The first limiting part 1131 and the second limiting part 1132 are not easy to come out of the corresponding second sub-holes, which can improve the connection stability of the current transformer 100 and the circuit board.

[0073] In some embodiments, the current transformer 100 includes a first mounting member 121 and a reset member, both disposed on the outside of the transformer body 102. A first latching member 111 includes a first mating portion located on the side of the first through-hole 1141 opposite to the first limiting portion 1131. The first mating portion is movably connected to the first mounting member 121 along a first direction X. A second latching member 112 includes a second mating portion located on the side of the second through-hole 1142 opposite to the second limiting portion 1132, and is connected to the first mounting member 121. Thus, by controlling the reciprocating movement of the first mating portion along the first direction X, the distance between the first latching member 111 and the second latching member 112 can be controlled, thereby controlling the distance between the first surface 1151 and the second surface 1152, facilitating the installation and removal of the latching structure 101 and the latching hole.

[0074] For example, the reset member is connected to the first mating part, and the reset member is used to drive the first mating part (i.e., the first latching member 111) to move away from the second mating part. For example, under the control of external force, the first latching member 111 moves towards the second latching member 112 to reduce the distance between the first latching member 111 and the second latching member 112, so that the first limiting part 1131 and the second limiting part 1132 can pass through the latching hole to realize the installation and removal of the latching structure 101 and the latching hole. After the external force is removed, the reset member can automatically drive the first latching member 111 to move away from the second latching member 112, increasing the distance between the first latching member 111 and the second latching member 112, so that the first limiting part 1131 and the second limiting part 1132 can prevent the latching structure 101 from falling out of the latching hole.

[0075] In some embodiments, the current transformer 100 includes an operating member located outside the transformer body 102. The operating member is movably connected to the first mounting member 121 along the direction from the first latching member 111 to the second latching member 112. The operating member includes a connecting part and an operating part. The connecting part is connected to the first mating part, and the operating part is located outside the first mounting member 121. In this way, the user can apply force to the operating part to drive the connecting part and the first mating part to reciprocate along the first direction X, which can reduce the difficulty for the user to apply force to the first latching member 111.

[0076] In some embodiments, the reset member is an elastic member located between the first mating part and the second mating part, and the elastic member is in a compressed state so that after the external force is removed, the first mating part and the second mating part will automatically move away from each other.

[0077] In some embodiments, see Figure 4 The current transformer 100 includes multiple reinforcing members 122, all of which are connected to the side of the first mounting member 121 opposite to the snap-fit ​​structure 101. The reinforcing members 122 are spaced apart along the direction from the first snap-fit ​​member 111 to the second snap-fit ​​member 112 (i.e., the first direction X). Thus, by providing the reinforcing members 122, the mechanical strength of the first mounting member 121 can be improved, and the connection stability between the first mounting member 121 and the transformer body 102 can be enhanced. For example, there can be any number of reinforcing members 122, such as two, three, or more.

[0078] In some embodiments, see Figure 3 , Figure 4 and Figure 9 The transformer body 102 includes a housing 130, a magnetic core 140, a winding wire 150, two conductive pins 160, and a second mounting component 172. The winding wire 150 is wound around the magnetic core 140, and the conductive pins 160 are respectively connected to the two ends of the winding wire 150.

[0079] For example, seeFigure 6 The conductive pin 160 includes a first sub-part 161, a second sub-part 163, and a third sub-part 163 connected in sequence. The two first sub-parts 161 are respectively connected to the two ends of the winding wire 150, and the second sub-part passes through the second mounting member 172. The first sub-parts 161 and the third sub-part 163 are respectively located on both sides of the second mounting member 172. For example, one end of the winding wire 150 can be wound around the first sub-part 161 of one conductive pin 160, and the other end of the winding wire 150 can be wound around the first sub-part 161 of another conductive pin 160.

[0080] In some embodiments, see Figure 3 and Figure 4 The housing 130 is provided with a mounting groove 132, which includes a first sub-mounting groove 1321 and a second sub-mounting groove 1322 that are connected. The magnetic core 140 and a portion of the winding wire 150 are disposed in the first sub-mounting groove 1321, and the second mounting member 172 and another portion of the winding wire 150 are disposed in the second sub-mounting groove 1322. An abutment member 173 is provided between the first sub-mounting groove 1321 and the second sub-mounting groove 1322. The abutment member 173 is spaced apart from the opening of the mounting groove 132, and a portion of the second mounting member 172 abuts against the side of the abutment member 173 facing away from the bottom wall of the mounting groove 132. For example, the end of the second mounting member 172 near the first sub-mounting groove 1321 is provided with an abutment surface 1721. Figure 6 The abutment surface 1721 abuts against the abutment member 173, which prevents the abutment surface 1721 from moving towards the bottom wall of the mounting groove 132, thereby preventing the second mounting member 172 from being inserted too deeply into the second sub-mounting groove 1322. The first sub-part 161 and part of the winding wire 150 can be located between the bottom wall of the second mounting member 172 and the second sub-mounting groove 1322. When the second mounting member 172 is installed in the second sub-mounting slot 1322, the first sub-part 161 and the winding wire 150 cannot be observed. If the second mounting member 172 is inserted too deeply into the second sub-mounting slot 1322, the first sub-part 161 will be squeezed and deformed, which will prevent the winding wire 150 from continuing to be wound on the first sub-part 161 and affect the performance of the current transformer 100. Therefore, by the cooperation of the abutment surface 1721 and the abutment member 173, the second mounting member 172 can be prevented from being inserted too deeply into the second sub-mounting slot 1322 to prevent the first sub-part 161 from being squeezed and deformed.

[0081] For example, winding wire 150 may include enameled wire.

[0082] For example, see Figure 2 and Figure 3After the magnetic core 140, winding wire 150 and second mounting member 172 are installed in the housing 130, the mounting groove 132 can be potted and sealed to form a seal 174. The seal 174 can fill the gap between the winding wire 150 and the housing 130, the gap between the second mounting member 172 and the housing 130, and the seal 174 can also cover the side of at least one of the second mounting member 172 and the winding wire 150 that is away from the bottom wall of the mounting groove 132.

[0083] In some embodiments, the snap-fit ​​structure 101, the first mounting member 121, and the reinforcing member 122 are all located outside the housing 130. The first mounting member 121 and the reinforcing member 122 are both connected to the housing 130, and the snap-fit ​​structure 101 is connected to the housing 130 through the first mounting member 121. The third sub-part 163 of the conductive pin 160 can extend outside the housing 130 for electrical connection with the circuit board.

[0084] For example, the first mounting member 121 and the second mounting member 172 can be located on opposite sides of the first sub-mounting groove 1321 (e.g., opposite sides along the second direction Y), and the conductive pin 160 and the snap-fit ​​structure 101 can be located on opposite sides of the first sub-mounting groove 1321. The third sub-part 163 is inserted into the socket on the circuit board and soldered, and the snap-fit ​​structure 101 is inserted into the snap-fit ​​hole on the circuit board and snapped in place, so that both opposite sides of the current transformer are connected to the circuit board, making the installation more stable and improving vibration damping.

[0085] For example, the magnetic core 140 can be a toroidal magnetic core.

[0086] For example, the first sub-mounting slot 1321 can be an annular slot.

[0087] In some embodiments, along the thickness direction of the circuit board (i.e., the third direction Z), the orthographic projection of the first mounting member 121 can be located at least partially outside the outer contour of the orthographic projection of the snap-fit ​​hole, so that the first mounting member 121 cannot pass through the snap-fit ​​hole. This is beneficial to prevent the snap-fit ​​structure 101 from continuing to move along the direction from the through portion 114 to the limiting portion 113 after the snap-fit ​​structure 101 is assembled in place.

[0088] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A current transformer, characterized in that, For use on a circuit board, the circuit board having snap-fit ​​holes; the current transformer includes: Mutual transformer body; A snap-fit ​​structure is provided on the transformer body; The snap-fit ​​structure includes two snap-fit ​​members spaced apart. Each snap-fit ​​member includes a connected through-hole and a limiting part. The limiting part is located on the side of the through-hole facing away from the current transformer body. The through-hole is used to pass through the snap-fit ​​hole. Along the thickness direction of the circuit board, at least a portion of the orthographic projection of the limiting part is located outside the orthographic projection outer contour of the snap-fit ​​hole.

2. The current transformer according to claim 1, characterized in that, The two snap-fit ​​components are defined as a first snap-fit ​​component and a second snap-fit ​​component, wherein the through-feed portion and the limiting portion of the first snap-fit ​​component are respectively a first through-feed portion and a first limiting portion, and the through-feed portion and the limiting portion of the second snap-fit ​​component are respectively a second through-feed portion and a second limiting portion. Along the thickness direction of the circuit board, the orthographic projection of the first limiting part is the first orthographic projection, the orthographic projection of the second limiting part is the second orthographic projection, and the orthographic projection of the snap-fit ​​hole is the third orthographic projection. At least a portion of the first orthographic projection and at least a portion of the second orthographic projection are located on both sides of the outer contour of the third orthographic projection.

3. The current transformer according to claim 2, characterized in that, The first limiting portion includes a first surface that is opposite to the second limiting portion, and the second limiting portion includes a second surface that is opposite to the first limiting portion; The distance between the first surface and the second surface gradually decreases along the direction from the first through portion to the first limiting portion.

4. The current transformer according to claim 3, characterized in that, The first limiting portion includes a third surface opposite to the second limiting portion, the third surface being located on the side of the first surface facing the first through portion and connected to the first surface; the second limiting portion includes a fourth surface opposite to the first limiting portion, the fourth surface being located on the side of the second surface facing the second through portion and connected to the second surface. The distance between the third surface and the fourth surface gradually increases along the direction from the first through portion to the first limiting portion.

5. The current transformer according to any one of claims 2-4, characterized in that, The first through-hole includes a fifth surface facing away from the second through-hole, the fifth surface being an arc surface, and the fifth surface protruding in a direction away from the second through-hole; a portion of the hole wall of the snap-fit ​​hole is in contact with the fifth surface; And / or, the second through portion includes a sixth surface opposite to the first through portion, the sixth surface being an arc surface, the sixth surface protruding in a direction opposite to the first through portion; a portion of the hole wall of the snap-fit ​​hole is in contact with the sixth surface; And / or, the first latching member includes a seventh surface facing the second latching member, the seventh surface being an arc surface, and the seventh surface being recessed in a direction away from the second latching member; And / or, the second snap-fit ​​member includes an eighth surface facing the first snap-fit ​​member, the eighth surface being an arc surface, the eighth surface being recessed in a direction away from the first snap-fit ​​member.

6. The current transformer according to any one of claims 1-4, characterized in that, The snap-fit ​​hole includes a first sub-hole and two second sub-holes. The two second sub-holes are located on both sides of the first sub-hole and communicate with the first sub-hole. The through-holes of the two snap-fit ​​members are correspondingly provided with the two second sub-holes, and the through-holes are used to pass through the corresponding second sub-holes. Along the thickness direction of the circuit board, the orthographic projection of the first sub-hole along the dimension perpendicular to the direction from the first sub-hole to the second sub-hole is the first dimension, the orthographic projection of the second sub-hole along the dimension perpendicular to the direction from the first sub-hole to the second sub-hole is the second dimension, and the orthographic projection of the limiting portion along the dimension perpendicular to the direction from the first sub-hole to the second sub-hole is the third dimension. The first dimension is greater than the second dimension, and the third dimension is greater than the second dimension and less than the first dimension.

7. The current transformer according to any one of claims 2-4, characterized in that, The current transformer includes a first mounting component and a reset component, both of which are disposed on the outside of the transformer body. The first snap-fit ​​member includes a first mating part, which is located on the side of the first through-part that is away from the first limiting part, and is movably connected to the first mounting member along the direction from the first snap-fit ​​member to the second snap-fit ​​member; the second snap-fit ​​member includes a second mating part, which is located on the side of the second through-part that is away from the second limiting part, and is connected to the first mounting member; The reset member is connected to the first mating part and is used to drive the first mating part to move away from the second mating part.

8. The current transformer according to claim 7, characterized in that, The current transformer includes an operating component located outside the transformer body, and the operating component is movably connected to the first mounting component along the direction from the first snap-fit ​​component to the second snap-fit ​​component. The operating component includes a connecting part and an operating part, wherein the connecting part is connected to the first mating part; And / or, the reset member is an elastic member, which is located between the first mating part and the second mating part and is in a compressed state; And / or, the current transformer includes a plurality of reinforcing members, all of which are connected to the side of the first mounting member away from the snap-fit ​​structure and are arranged at intervals along the direction from the first snap-fit ​​member to the second snap-fit ​​member.

9. The current transformer according to any one of claims 1-4, characterized in that, The transformer body includes a housing, a magnetic core, a winding wire, two conductive pins, and a second mounting component. The winding wire is wound around the magnetic core. The conductive pins include a first sub-part, a second sub-part, and a third sub-part connected in sequence. The two first sub-parts are respectively connected to the two ends of the winding wire. The second sub-part passes through the second mounting component, and the first sub-part and the third sub-part are respectively located on both sides of the second mounting component. The housing is provided with a mounting groove, which includes a first sub-mounting groove and a second sub-mounting groove that are connected. The magnetic core is disposed in the first sub-mounting groove, and the second mounting member is disposed in the second sub-mounting groove. An abutment member is provided between the first sub-mounting groove and the second sub-mounting groove. A portion of the second mounting member abuts against the side of the abutment member that is away from the bottom wall of the mounting groove. The first sub-part and a portion of the winding wire are located between the second mounting member and the bottom wall of the second sub-mounting groove.

10. A current transformer assembly, characterized in that, It includes a circuit board and the current transformer as described in any one of claims 1-9 above.

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