Coil assembly, relay and method of winding a coil assembly

Abstract

This application discloses a coil assembly and its winding method, as well as a relay. The coil assembly includes a coil frame, first to third coil lead plates, and enameled wire. The coil frame includes a first winding portion and a second winding portion arranged along a first direction. The enameled wire includes a first winding segment and a second winding segment that are not electrically connected. The first winding segment includes a first winding wound on the first winding portion and a second winding wound on the second winding portion. When the first and second coil lead plates are energized, the first and second windings form a first parallel circuit, and the magnetic fields formed by the first and second windings after being energized are in the same direction. The second winding segment includes a third winding wound on the first winding portion and a fourth winding wound on the second winding portion. When the second and third coil lead plates are energized, the third and fourth windings form a second parallel circuit, and the magnetic fields formed by the third and fourth windings are in the same direction.

Description

Technical Field

[0001] This application relates to the field of electrical control device technology, and more specifically, to a coil assembly, a relay, and a method for winding the coil assembly. Background Technology

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is commonly used in automatic control circuits. Essentially, a relay is an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in circuits.

[0003] In existing technologies, the coil assembly of a relay typically includes a coil frame and windings wound on the coil frame. During actual operation, when current is applied to the windings of the coil assembly, the windings generate a closed magnetic field circuit. However, existing coil assembly designs have flaws, leading to severe magnetic field attenuation, which in turn reduces the magnetic field utilization rate of the coil assembly and significantly impacts the operational reliability of the relay's armature assembly. Summary of the Invention

[0004] This application provides a coil assembly, a relay, and a winding method for the coil assembly to solve the problem of severe magnetic field attenuation in the prior art.

[0005] The coil assembly in this application embodiment includes: A coil frame includes a first winding portion and a second winding portion arranged along a first direction. The first winding portion has a first mounting hole, and the second winding portion has a second mounting hole. The axis of the first mounting hole coincides with the axis of the second mounting hole. Both the first mounting hole and the second mounting hole are used to mount a core. Multiple coil lead-out pieces are connected to the side of the first winding portion facing away from the second winding portion; the multiple coil lead-out pieces include a first coil lead-out piece, a second coil lead-out piece, and a third coil lead-out piece; The enameled wire includes a first winding segment and a second winding segment that are not electrically connected to each other. The first winding segment includes a first winding wound on the first winding portion and a second winding wound on the second winding portion. The two ends of the first winding are electrically connected to the first coil lead and the second coil lead, respectively. The two ends of the second winding are also electrically connected to the first coil lead and the second coil lead, respectively. When the first coil lead and the second coil lead are energized, the first winding and the second winding form a first parallel circuit, and the magnetic fields generated by the first winding and the second winding after being energized are in the same direction. The second winding segment includes a third winding wound on the first winding portion and a fourth winding wound on the second winding portion; the two ends of the third winding are electrically connected to the second coil lead and the third coil lead, respectively, and the two ends of the fourth winding are electrically connected to the second coil lead and the third coil lead, respectively; wherein, when the second coil lead and the third coil lead are energized, the third winding and the fourth winding form a second parallel circuit, and the magnetic fields formed by the third winding and the fourth winding are in the same direction.

[0006] According to some embodiments of this application, the direction of the magnetic field formed by the first winding and the second winding after being energized is opposite to the direction of the magnetic field formed by the third winding and the fourth winding after being energized.

[0007] According to some embodiments of this application, the first coil lead, the second coil lead, and the third coil lead are arranged side by side along a second direction, which is perpendicular to the first direction.

[0008] According to some embodiments of this application, the second coil lead is located between the first coil lead and the third coil lead.

[0009] According to some embodiments of this application, the coil frame further includes an intermediate portion connected between the first winding portion and the second winding portion, the intermediate portion being provided with two first limiting structures, each of the first limiting structures engaging with at least one limiting structure of the first winding segment and the second winding segment.

[0010] According to some embodiments of this application, the first winding segment further includes two first extension segments, one end of the second winding is electrically connected to the second coil lead sheet through one of the first extension segments, and the other end of the second winding is electrically connected to the first coil lead sheet through the other first extension segment; the two first extension segments are respectively limited and cooperated with the two first limiting structures. The second winding segment also includes two second extension segments. One end of the fourth winding is electrically connected to the second coil lead through one of the second extension segments, and the other end of the fourth winding is electrically connected to the third coil lead through the other second extension segment. The two second extension segments are respectively limited and engaged with the two first limiting structures.

[0011] According to some embodiments of this application, the middle portion is provided with the first limiting structure at both ends along the second direction, and the second direction is perpendicular to the first direction.

[0012] According to some embodiments of this application, the two first limiting structures are located on the same side of the middle portion.

[0013] According to some embodiments of this application, the first limiting structure includes a first wiring groove, and at least one of the first winding segment and the second winding segment passes through the corresponding first wiring groove.

[0014] According to some embodiments of this application, the openings of the two first wiring channels face the same direction.

[0015] According to some embodiments of this application, a plurality of second limiting structures are provided on the side of the first winding portion away from the second winding portion, and the positions of the plurality of second limiting structures correspond to the positions of the plurality of coil lead pieces respectively; The first winding segment further includes two third extension segments. The two third extension segments are respectively limited and cooperated with the second limiting structure corresponding to the first coil lead piece and the second limiting structure corresponding to the second coil lead piece, and are respectively wound on the first coil lead piece and the second coil lead piece. The two ends of the first winding are respectively integrally connected to the two third extension segments. The second winding segment also includes two fourth extension segments. The two fourth extension segments are respectively limited and cooperated with the second limiting structure corresponding to the second coil lead piece and the second limiting structure corresponding to the third coil lead piece, and are respectively wound on the second coil lead piece and the third coil lead piece. The two ends of the third winding are respectively integrally connected to the two fourth extension segments.

[0016] According to some embodiments of this application, each of the second limiting structures includes a guide portion, the guide portion having a supporting surface, and each of the third extensions and each of the fourth extensions respectively abutting against the supporting surface of the corresponding guide portion.

[0017] According to some embodiments of this application, the second limiting structure corresponding to the first coil lead-out piece and the second limiting structure corresponding to the third coil lead-out piece respectively further include a second wiring groove, and each second wiring groove is located on one side of the corresponding guide portion along the first direction; The third extension section wound around the first coil lead piece is defined as the first outer extension section, and the first outer extension section passes through the second wiring groove corresponding to the first coil lead piece. The fourth extension section wound around the third coil lead piece is defined as the second outer extension section, and the second outer extension section passes through the second wiring groove corresponding to the third coil lead piece.

[0018] According to some embodiments of this application, the abutting surface of the guide portion faces opposite directions to the bottom surface of the corresponding second wiring groove, and there is a height difference between them; The first outer extension and the second outer extension are respectively inclined and stretched between the abutting surface of the corresponding guide and the bottom surface of the second wiring groove.

[0019] According to some embodiments of this application, a plurality of mounting portions are provided on the side of the first winding portion facing away from the first winding portion, and a plurality of coil lead pieces are mounted on the plurality of mounting portions in a corresponding manner, and a plurality of second limiting structures are disposed on the plurality of mounting portions in a corresponding manner.

[0020] The relays in this application include the coil assembly described in any of the preceding claims.

[0021] According to some embodiments of this application, it also includes an armature assembly, which is located on one side of the coil frame of the coil assembly along a third direction, the third direction being perpendicular to the first direction; the armature assembly includes an armature and a permanent magnet, the permanent magnet being fixed to the side of the armature facing the coil frame along the third direction; The first winding section and the second winding section of the coil frame are respectively connected to yokes on opposite sides. The first winding section and the second winding section are respectively provided with cores. Each yoke is connected to the corresponding core. The coil assembly is configured to drive the armature assembly to be movably disposed between the two yokes along the first direction in response to an input signal.

[0022] According to some embodiments of this application, the armature assembly further includes a magnetic conductor, the armature being fixed to the first magnetic pole of the permanent magnet, the magnetic conductor being fixed to the second magnetic pole of the permanent magnet, the first magnetic pole and the second magnetic pole being arranged in opposite positions and opposite polarities, and the magnetic conductor being located between the two cores.

[0023] According to some embodiments of this application, the magnetization direction of the permanent magnet is the third direction.

[0024] The winding method of the coil assembly in this application includes: A coil frame is provided, the coil frame including a first winding portion and a second winding portion arranged along a first direction, the first winding portion having a first mounting hole, the second winding portion having a second mounting hole, the axis of the first mounting hole coinciding with the axis of the second mounting hole, both the first mounting hole and the second mounting hole being used to mount a core; wherein, a plurality of coil lead-out pieces are connected to the side of the first winding portion opposite to the second winding portion, the plurality of coil lead-out pieces including a first coil lead-out piece, a second coil lead-out piece and a third coil lead-out piece; In the step of winding enameled wire, a first winding is wound around the outer periphery of the first winding portion using a first winding segment of the enameled wire, and a second winding is wound around the outer periphery of the second winding portion. A third winding is wound around the outer periphery of the first winding portion using a second winding segment of the enameled wire, and a fourth winding is wound around the outer periphery of the second winding portion. The two ends of the first winding are electrically connected to the first coil lead and the second coil lead, respectively. The two ends of the second winding are also electrically connected to the first coil lead and the second coil lead, respectively. The two ends of the third winding are also electrically connected to the second coil lead and the third coil lead, respectively. When the first and second coil leads are energized, the magnetic fields formed by the first and second windings are in the same direction. When the second and third coil leads are energized, the magnetic fields formed by the third and fourth windings are in the same direction. The first winding segment and the second winding segment are not electrically connected to each other.

[0025] According to some embodiments of this application, the direction of the magnetic field formed by the first winding and the second winding after being energized is opposite to the direction of the magnetic field formed by the third winding and the fourth winding after being energized.

[0026] According to some embodiments of this application, the step of winding the enameled wire includes: Connect the entire enameled wire to the lead-out piece of the first coil; The first winding is formed by winding the outer periphery of the first winding portion, and after forming the first winding, the enameled wire is returned to the second coil lead piece and the enameled wire is electrically connected to the second coil lead piece; The enameled wire starts from the second coil lead piece, winds around the outer periphery of the second winding portion to form the second winding, and after forming the second winding, the enameled wire is returned to the first coil lead piece and electrically connected to the first coil lead piece; The enameled wire starts from the first coil lead and winds around to the second coil lead; The enameled wire starts from the second coil lead piece, winds around the outer periphery of the first winding portion to form the third winding, and after forming the third winding, the enameled wire is returned to the third coil lead piece and electrically connected to the third coil lead piece; Starting from the third coil lead piece, the fourth winding is formed by winding around the outer periphery of the second winding portion. After forming the fourth winding, the enameled wire is returned to the second coil lead piece and electrically connected to the second coil lead piece. The enameled wire between the first coil lead and the second coil lead is cut off so that the first winding segment and the second winding segment form two non-conductive wire segments.

[0027] According to some embodiments of this application, the coil frame further includes an intermediate portion connected between the first winding portion and the second winding portion, the intermediate portion being provided with two first limiting structures; Starting from the second coil lead piece and before forming the second winding around the outer periphery of the second winding portion, and starting from the third coil lead piece and before forming the fourth winding around the outer periphery of the second winding portion, the winding method further includes: crossing the middle portion of the enameled wire in a first direction and making the enameled wire engage with one of the first limiting structures. After forming the second winding and before returning the enameled wire to the first coil lead, and after forming the fourth winding and before returning the enameled wire to the second coil lead, the winding method further includes: crossing the middle portion of the enameled wire along the first direction and positioning the enameled wire in a limiting engagement with another first limiting structure.

[0028] According to some embodiments of this application, a second limiting structure is provided next to each of the coil lead-out pieces; After the enameled wire is wound out of each of the coil leads and before it is wound into each of the coil leads, the enameled wire is engaged with the second limiting structure corresponding to each of the coil leads.

[0029] An embodiment of the above application has at least the following advantages or beneficial effects: In this embodiment of the coil assembly, when the first and second coil leads are energized, the first and second windings form a first parallel circuit, and the resulting magnetic fields are in the same direction. When the second and third coil leads are energized, the third and fourth windings form a second parallel circuit, and the resulting magnetic fields are in the same direction. Compared to the prior art's arrangement of one or two windings in series, the coil assembly of this embodiment allows the magnetic fields formed after the first and second coil leads are energized to be concentrated at the centers of the first and second windings, respectively. Furthermore, the magnetic fields formed after the second and third coil leads are energized are concentrated at the centers of the third and fourth windings, respectively. This results in a more concentrated magnetic field, less magnetic field attenuation, and higher magnetic circuit efficiency for the entire coil assembly. Furthermore, when the coil assembly and the armature assembly of this embodiment are engaged, since the magnetic fields formed by the first winding and the second winding after being energized are in the same direction (i.e., the polarities of adjacent magnetic poles in the first winding and the second winding are opposite), and the magnetic fields formed by the third winding and the fourth winding after being energized are in the same direction (i.e., the polarities of adjacent magnetic poles in the third winding and the fourth winding are opposite), the coil assembly can generate an attraction and repulsion force on the armature assembly during the switching process of the armature assembly, making the switching action of the armature assembly faster and improving the reliability of the armature assembly action. Attached Figure Description

[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0031] Figure 1 This is an exploded view of a relay according to an embodiment of this application.

[0032] Figure 2 yes Figure 1 A 3D diagram of the base.

[0033] Figure 3 This is a schematic diagram of the coil assembly of a relay according to an embodiment of this application, wherein the first winding, second winding, third winding and fourth winding are omitted.

[0034] Figure 4 yes Figure 3 A schematic diagram of the coil frame.

[0035] Figure 5 This is a schematic diagram of the magnetic attraction between the armature assembly and the first yoke in one embodiment of this application.

[0036] Figure 6 This is a schematic diagram of the magnetic attraction between the armature assembly and the second yoke in one embodiment of this application.

[0037] Figure 7 This is a schematic diagram showing the connection between the core and the yoke.

[0038] Figures 8 to 11 These are schematic diagrams illustrating different steps of the winding method for the coil assembly according to embodiments of this application.

[0039] The reference numerals in the attached figures are explained as follows: 100. Magnetic circuit section; 110. Armature assembly; 111. Armature component; 111a. Activation part; 1111. First activation part; 1112. Second activation part; 112. Permanent magnet; 120. Coil assembly; 121. Core; 123. Yoke component; 1231. First yoke component; 1232. Second yoke component; 130. Coil frame; 131. First winding part; 1311. First mounting hole; 132. Intermediate part; 1321. First limiting structure; 1321a. First... 133. Wiring groove; 1331. Second winding section; 134. Mounting section; 140a. First winding segment; 140b. Second winding segment; 141. First winding; 142. Second winding; 143. Third winding; 144. Fourth winding; 145. First extension section; 146. Second extension section; 147. Third extension section; 148. Fourth extension section; 150. Second limiting structure; 151. Second wiring groove; 152. Guide section; 1521. Supporting surface; 200, Coil lead piece; 200a, First coil lead piece; 200b, Second coil lead piece; 200c, Third coil lead piece; 300. Base; 302. First receiving groove; 303. Second receiving groove; 500. Casing; 600. Contact portion; 610. Moving part; 620. Contact assembly; 621. Moving contact; 621a. First moving contact; 621b. Second moving contact; 622. Stationary contact; 622a. Stationary contact group; 700, sealing plate. Detailed Implementation

[0040] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0041] It is understood that the terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0042] For ease of explanation, the terms "first direction," "second direction," and "third direction" are used in the specific embodiments of this application. These terms simply refer to a feature having one of the aforementioned directions being perpendicular to a feature having another direction, and do not require that they be implemented according to the "first direction," "second direction," and "third direction" described in the embodiments. In the embodiments, the first direction, second direction, and third direction are mutually perpendicular.

[0043] Unless otherwise specified, the terms “first,” “second,” or “third,” etc., in the claims and description are used to distinguish different objects and not to describe a particular order.

[0044] Unless otherwise specified, in the claims and description, the terms “horizontal,” “vertical,” “top,” “bottom,” “inner,” “outer,” “upper,” “lower,” “front,” “back,” “left,” “right,” etc., indicate the orientation or positional relationship based on the orientation and positional relationship shown in the drawings, and are only for the purpose of simplifying the description, and do not imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation.

[0045] like Figure 1 As shown, the relay in this embodiment includes a base 300, a housing 500, a magnetic circuit portion 100, and a contact portion 600. Both the magnetic circuit portion 100 and the contact portion 600 are mounted on the base 300. The magnetic circuit portion 100 and the contact portion 600 are driven together. The magnetic circuit portion 100 is configured to drive the contact portion 600 to switch between a first state and a second state in response to an input signal.

[0046] Optionally, the length direction of the base 300 is the first direction X, the width direction of the base 300 is the second direction Y, and the height direction of the base 300 is the third direction Z.

[0047] The magnetic circuit portion 100 includes an armature assembly 110 and a coil assembly 120, the coil assembly 120 being configured to drive the armature assembly 110 to move in response to an input signal.

[0048] like Figure 1 and Figure 2As shown, the base 300 has a first receiving groove 302 and a second receiving groove 303. At least a portion of the magnetic circuit portion 100 is disposed in the first receiving groove 302. The housing 500 is connected to the base 300 to limit the magnetic circuit portion 100 within the first receiving groove 302.

[0049] The contact portion 600 is disposed in the second receiving groove 303. The relay also includes a sealing plate 700, which is connected to the base 300 to limit the contact portion 600 in the second receiving groove 303.

[0050] like Figure 2 As shown, the contact portion 600 includes a movable member 610 and at least one contact assembly 620. The armature assembly 110 of the magnetic circuit portion 100 is connected to the movable member 610, and the armature assembly 110 can drive the movable member 610 to reciprocate along a first direction X. The contact assembly 620 includes a movable contact 621 and a stationary contact 622. The movable contact 621 is connected to the movable member 610 and moves with the movable member 610. The stationary contact 622 is mounted on the base 300, and a portion of the stationary contact 622 is located within the second receiving groove 303. When the movable member 610 moves along the first direction X, it can drive the movable contact 621 to move, so that the movable contact 621 contacts or separates from the stationary contact 622, thereby switching the contact portion 600 between a first state and a second state.

[0051] Optionally, the contact component 620 can be any of the following: normally open contact, normally closed contact, or changeover contact.

[0052] Taking a contact component as a changeover contact as an example, such as Figure 2 As shown, the contact assembly 620 includes two moving contacts 621 and two stationary contact groups 622a, with each moving contact 621 corresponding to one of the two stationary contact groups 622a. The two moving contacts 621 are arranged at intervals along a first direction X, and each stationary contact group 622a includes two stationary contacts 622 arranged at intervals along a second direction Y. Each moving contact 621 has its two ends along the second direction Y in contact with or separate from the two stationary contacts 622 of the corresponding stationary contact group 622a.

[0053] For ease of explanation, the two moving contacts 621 included in the contact assembly 620 are defined as a first moving contact 621a and a second moving contact 621b, respectively. When the contact portion 600 is in the first state, the first moving contact 621a contacts the two stationary contacts 622 of the corresponding stationary contact group 622a at both ends along the second direction Y, while the second moving contact 621b is separated from the two stationary contacts 622 of the corresponding stationary contact group 622a at both ends along the second direction Y. When the contact portion 600 is in the second state, the first moving contact 621a is separated from the two stationary contacts 622 of the corresponding stationary contact group 622a at both ends along the second direction Y, while the second moving contact 621b contacts the two stationary contacts 622 of the corresponding stationary contact group 622a at both ends along the second direction Y.

[0054] Optionally, the number of contact components 620 included in the contact portion 600 can be one or more. When the number of contact components 620 is multiple, the multiple contact components 620 are arranged at intervals along the first direction X.

[0055] In one implementation, such as Figure 2 As shown, the number of contact components 620 is three, but this is not a limitation.

[0056] like Figure 3 and Figure 4 As shown, the coil assembly 120 of this embodiment includes a coil frame 130, a plurality of coil lead sheets 200, and enameled wire. The enameled wire includes a first winding segment 140a that is not electrically connected to each other (e.g., ...). Figure 8 ) and the second winding segment 140b (e.g. Figure 10 It should be noted that, in order to Figure 3 The view is clear, but the first winding segment 140a and the second winding segment 140b are not shown.

[0057] The coil frame 130 includes a first winding portion 131 and a second winding portion 133 arranged along a first direction X. The first winding portion 131 has a first mounting hole 1311, and the second winding portion 133 has a second mounting hole 1331. The axis of the first mounting hole 1311 coincides with the axis of the second mounting hole 1331. Both the first mounting hole 1311 and the second mounting hole 1331 are used to mount the core. A plurality of coil lead-out pieces 200 are connected to the side of the first winding portion 131 facing away from the second winding portion 133. The plurality of coil lead-out pieces 200 include a first coil lead-out piece 200a, a second coil lead-out piece 200b, and a third coil lead-out piece 200c. The first winding segment 140a includes a first winding 141 wound on the first winding portion 131 (e.g., ...). Figure 8 ) and the second winding 142 wound on the second winding portion 133 (such as Figure 9The two ends of the first winding 141 are electrically connected to the first coil lead 200a and the second coil lead 200b, respectively, and the two ends of the second winding 142 are electrically connected to the first coil lead 200a and the second coil lead 200b, respectively. When the first coil lead 200a and the second coil lead 200b are energized, the first winding 141 and the second winding 142 form a first parallel circuit, and the magnetic fields formed by the first winding 141 and the second winding 142 after being energized are in the same direction; the second winding segment 140b includes a third winding 143 (e.g., ...) wound on the first winding portion 131. Figure 10 ) and the fourth winding 144 wound on the second winding portion 133 (e.g. Figure 11 The two ends of the third winding 143 are electrically connected to the second coil lead 200b and the third coil lead 200c, respectively. The two ends of the fourth winding 144 are also electrically connected to the second coil lead 200b and the third coil lead 200c, respectively. When the second coil lead 200b and the third coil lead 200c are energized, the third winding 143 and the fourth winding 144 form a second parallel circuit, and the magnetic fields generated by the energized third winding 143 and the fourth winding 144 are in the same direction.

[0058] In the coil assembly 120 of this application embodiment, when the first coil lead 200a and the second coil lead 200b are energized, the first winding 141 and the second winding 142 form a first parallel circuit, and the magnetic field they form has the same direction. When the second coil lead 200b and the third coil lead 200c are energized, the third winding 143 and the fourth winding 144 form a second parallel circuit, and the magnetic field formed by the third winding 143 and the fourth winding 144 after being energized has the same direction. Compared to the existing technology that uses one or two windings connected in series, the coil assembly 120 of this embodiment, after the first coil lead 200a and the second coil lead 200b are energized, can concentrate the magnetic field formed by them at the center of the first winding 141 and the center of the second winding 142, respectively. Furthermore, after the second coil lead 200b and the third coil lead 200c are energized, the magnetic fields formed by them can concentrate at the center of the third winding 143 and the center of the fourth winding 144, respectively. This results in a more concentrated magnetic field, less magnetic field attenuation, and higher magnetic circuit efficiency for the entire coil assembly 120. In addition, when the coil assembly 120 of this embodiment is connected to the armature assembly (such as...) Figure 5 and Figure 6When the first winding 141 and the second winding 142 are energized, the magnetic fields formed are in the same direction, that is, the polarities of adjacent magnetic poles in the first winding 141 and the second winding 142 are opposite. Similarly, the magnetic fields formed by the third winding 143 and the fourth winding 144 are in the same direction, that is, the polarities of adjacent magnetic poles in the third winding 143 and the fourth winding 144 are opposite. Therefore, during the switching process of the armature assembly, the coil assembly 120 can exert an attraction and repulsion force on the armature assembly, making the switching action of the armature assembly faster and improving the reliability of the armature assembly action.

[0059] In one embodiment, the magnetic field generated by the first winding 141 and the second winding 142 after being energized is in the opposite direction to the magnetic field generated by the third winding 143 and the fourth winding 144 after being energized.

[0060] As an example, when the first coil lead 200a and the second coil lead 200b are energized, the magnetic field formed by the first winding 141 and the second winding 142 is in the positive direction of the first direction X; when the second coil lead 200b and the third coil lead 200c are energized, the magnetic field formed by the third winding 143 and the fourth winding 144 is in the negative direction of the first direction X, with the positive direction being opposite to the negative direction.

[0061] like Figure 3 As shown, the first coil lead 200a, the second coil lead 200b, and the third coil lead 200c are arranged side by side along the second direction Y. Further, the second coil lead 200b is located between the first coil lead 200a and the third coil lead 200c.

[0062] Of course, in other embodiments, the arrangement of the three coil lead pieces in the second direction Y can also be as follows: the first coil lead piece 200a is located between the second coil lead piece 200b and the third coil lead piece 200c; or, the third coil lead piece 200c is located between the first coil lead piece 200a and the second coil lead piece 200b.

[0063] Next Figure 5 and Figure 6 An exemplary embodiment is shown to illustrate how the coil assembly 120 of this application creates an "attractive and repulsive" force on the armature assembly 110. For clarity of view, Figure 5 Only the first winding 141 and the second winding 142 are shown, while the third winding 143 and the fourth winding 144 are omitted. Figure 6 Only the third winding 143 and the fourth winding 144 are shown, while the first winding 141 and the second winding 142 are omitted.

[0064] like Figure 5 and Figure 6As shown, yokes 123 are respectively provided on opposite sides of the first winding portion 131 and the second winding portion 133 along the first direction X, and each yoke 123 is connected to the corresponding core portion 121. For ease of explanation, the yoke 123 located on the side of the first winding portion 131 opposite to the second winding portion 133 is defined as the first yoke 1231, and the yoke 123 located on the side of the second winding portion 133 opposite to the first winding portion 131 is defined as the second yoke 1232.

[0065] The armature assembly 110 is located below the coil frame 130 and includes an armature 111 and a permanent magnet 112. The permanent magnet 112 is disposed on the side of the armature 111 facing the coil frame 130 and moves with the armature 111. The armature 111 has attraction portions 111a at both ends along the first direction X. These attraction portions 111a are used to contact and magnetically engage with the first yoke 1231 and the second yoke 1232, respectively. For ease of explanation, the attraction portion 111a magnetically engaging with the first yoke 1231 is defined as the first attraction portion 1111, and the attraction portion 111a magnetically engaging with the second yoke 1232 is defined as the second attraction portion 1112.

[0066] Optionally, the armature assembly 110 also includes a magnetic conductor 113, which is located on the side of the permanent magnet 112 facing away from the armature assembly 111.

[0067] In one embodiment, the magnetization direction of the permanent magnet 112 is the third direction Z, and the polarity of the permanent magnet 112 facing the armature 111 is defined as the N pole, and the polarity of the permanent magnet 112 facing away from the armature 111 is defined as the S pole. The armature 111 is fixed to the first magnetic pole of the permanent magnet 112, and the magnetic conductor 113 is fixed to the second magnetic pole of the permanent magnet 112. The first magnetic pole and the second magnetic pole are arranged oppositely and have opposite polarities. The first magnetic pole and the second magnetic pole are the N pole and the S pole, respectively.

[0068] like Figure 5 As shown, when the first coil lead 200a and the second coil lead 200b are energized, the first winding 141 generates a magnetic field, with the polarity of the end near the second winding 142 being N and the polarity of the end away from the second winding 142 being S. Similarly, when the second winding 142 is energized, it generates a magnetic field, with the polarity of the end near the first winding 141 being S and the polarity of the end away from the first winding 141 being N. The armature assembly 110 is in the first position, at which time the permanent magnet 112 is magnetically attracted to the core 121 surrounding the first winding 141, the first attracting part 1111 is magnetically attracted to the first yoke 1231, and the magnetically conductive element 113 is magnetically attracted to the core 121 surrounding the first winding 141.

[0069] like Figure 6As shown, the second coil lead 200b and the third coil lead 200c are energized. The polarity of the end of the third winding 143 closest to the fourth winding 144 is S-pole, and the polarity of the end furthest from the fourth winding 144 is N-pole. The polarity of the end of the fourth winding 144 closest to the third winding 143 is N-pole, and the polarity of the end furthest from the third winding 143 is S-pole. Because the polarity of the left end of the first winding portion 131 changes from N-pole to S-pole, the force between the third winding 143 and the permanent magnet 112 becomes a repulsive force, and the force between the first attraction portion 1111 and the first yoke 1231 changes from attraction to repulsion. Meanwhile, the attraction between the fourth winding 144 and the permanent magnet 112 increases, and the attraction between the second attraction portion 1112 and the second yoke 1232 also increases. Driven by both attraction and repulsion, the armature assembly 110 switches to the second position. At this time, the second engaging part 1112 contacts and magnetically engages with the second yoke 1232, and the permanent magnet 112 magnetically engages with the core 121 surrounded by the fourth winding 144, and the magnetic conductor 113 magnetically engages with the core 121 surrounded by the fourth winding 144. Therefore, by energizing the first coil lead 200a and the second coil lead 200b, or the second coil lead 200b and the third coil lead 200c, the armature assembly 110 can reciprocate along the first direction X. Thus, when switching, the armature assembly 110 as a whole is subjected to an attraction and a repulsion force.

[0070] It is evident that regardless of whether the armature assembly 110 is in the first or second position, it can form at least three magnetic pole faces. Therefore, compared to the related art where the armature assembly forms a single magnetic pole face when in the held state, the relay implemented in this application has multiple magnetic pole faces in the magnetic circuit formed when the armature assembly 110 is in the held state. The attraction between the coil assembly and the armature assembly 110 is greater, resulting in a larger holding force in the magnetic circuit structure, improving shock resistance, and preventing the relay from accidentally opening or closing.

[0071] In addition, the magnetic conductor 113 is located between the two cores 121. On the one hand, the direction of the attraction between the magnetic conductor 113 and the corresponding core 121 is basically along the first direction X, which is more conducive to improving the holding force. On the other hand, the magnetic conductor 113 can guide the magnetic field in the air that was originally located between the two cores 121 into the magnetic circuit, avoid magnetic leakage, increase the magnetic flux in the magnetic circuit, and thus increase the magnetic attraction between the magnetic conductor 113 and the core 121, further increasing the holding force on the armature assembly 110. Furthermore, the magnetic conductor 113 increases the magnetic pole surface, thereby increasing the attraction during the switching process, which helps to improve the switching speed.

[0072] Furthermore, the armature assembly 110 is composed of Figure 5 Position towards Figure 6During position switching, the magnetic field generated by the energized third winding 143 is opposite in direction to the magnetic field of the permanent magnet 112. Therefore, a repulsive force is formed between the permanent magnet 112 and the core 121 surrounded by the third winding 143. The component of this repulsive force along the first direction X helps drive the armature assembly 110 to move to the second position. Simultaneously, the magnetic field generated by the energized fourth winding 144 is in the same direction as the magnetic field of the permanent magnet 112. At this time, an attractive force is formed between the permanent magnet 112 and the core 121 surrounded by the fourth winding 144. The component of this attractive force along the first direction X also helps drive the armature assembly 110 to move to the second position. Therefore, during armature assembly 110 switching, it is simultaneously subjected to both repulsive and attractive forces in the same direction, further accelerating the switching speed of the armature assembly 110.

[0073] Please continue reading. Figure 3 The coil frame 130 also includes an intermediate portion 132 connected between the first winding portion 131 and the second winding portion 133. The intermediate portion 132 is provided with two first limiting structures 1321, each of which engages with at least one limiting structure of the first winding segment 140a and the second winding segment 140b.

[0074] In this embodiment, by providing two first limiting structures 1321 on the middle part 132, the first winding segment 140a and the second winding segment 140b can be limited by the first limiting structures 1321 when crossing the middle part 132. That is, the first winding segment 140a and the second winding segment 140b are limited to the predetermined position of the middle part 132, thus avoiding the problem of wire breakage during wire throwing or coil assembly 120 assembly.

[0075] Furthermore, by providing an intermediate portion 132 between the first winding portion 131 and the second winding portion 133, the first winding portion 131 and the second winding portion 133 are spaced apart in the first direction X. This allows the first winding 141 and the second winding 142 to be arranged spaced apart in the first direction X, avoiding mutual interference between the magnetic fields generated by the first winding 141 and the second winding 142, resulting in higher magnetic efficiency. Simultaneously, the third winding 143 and the fourth winding 144 can also be arranged spaced apart in the first direction X, avoiding mutual interference between the magnetic fields generated by the third winding 143 and the fourth winding 144, resulting in even higher magnetic efficiency.

[0076] In one embodiment, the middle portion 132 is provided with first limiting structures 1321 at both ends along the second direction Y.

[0077] In this embodiment, by setting two first limiting structures 1321 at both ends of the middle portion 132 along the second direction Y, the connection points of the first winding segment 140a and the second winding segment 140b with the middle portion 132 are also fixed at both ends of the middle portion 132 along the second direction Y.

[0078] In one embodiment, the two first limiting structures 1321 are located on the same side of the middle portion 132.

[0079] In an exemplary embodiment, the first limiting structure 1321 includes a first wiring groove 1321a, and a first winding segment 140a and / or a second winding segment 140b passing through the corresponding first wiring groove 1321a.

[0080] In one embodiment, the openings of the two first wiring channels 1321a face the same direction.

[0081] Of course, in other embodiments, the first wiring groove 1321a can also be replaced by multiple hooks or other structures that can limit and fix the first winding segment 140a and / or the second winding segment 140b.

[0082] like Figure 3 As shown, the first winding section 131 has multiple mounting sections 134 on the side opposite to the second winding section 133, and multiple coil lead pieces 200 are mounted on the multiple mounting sections 134 in a corresponding manner.

[0083] In one embodiment, each coil lead 200 is inserted into a corresponding mounting portion 134.

[0084] like Figure 3 As shown, a plurality of second limiting structures 150 are provided on the side of the first winding portion 131 facing away from the second winding portion 133, and the positions of the plurality of second limiting structures 150 correspond to the positions of the plurality of coil lead pieces 200. The second limiting structures 150 are used to limit the enameled wire.

[0085] In one embodiment, a plurality of second limiting structures 150 are respectively provided in a plurality of mounting portions 134.

[0086] In one embodiment, the second limiting structure 150 corresponding to the first coil lead-out piece 200a and the second limiting structure 150 corresponding to the third coil lead-out piece 200c correspond to the positions of the two first limiting structures 1321 in the first direction X.

[0087] In this embodiment, the two outermost second limiting structures 150 correspond to the positions of the two first limiting structures 1321, respectively. This ensures that the enameled wire maintains a basically straight posture after being limited by the corresponding first limiting structures 1321 and second limiting structures 150, resulting in a more reliable limiting effect. Furthermore, maintaining the straight posture of the enameled wire section spanning the first winding portion 131 also prevents this section from overlapping with the windings on the outer periphery of the first winding portion 131. Moreover, it also prevents the winding needle from colliding with other parts of the coil frame 130 during winding, improving winding efficiency.

[0088] In one embodiment, each second limiting structure 150 is disposed on the side of the corresponding mounting portion 134 along the second direction Y.

[0089] like Figure 3 As shown, each second limiting structure 150 includes a guide portion 152, which has a supporting surface 1521. After the enameled wire is wound out of each coil lead piece and before it is wound into each coil lead piece, the enameled wire abuts against the supporting surface 1521 of the guide portion 152 corresponding to each coil lead piece. By providing the guide portion 152, which has a supporting surface 1521, the enameled wire can be kept taut when wound into and out of each coil lead piece, preventing the coil from becoming loose or deformed. It also avoids the problem of the enameled wire breaking due to scratching other components during the subsequent assembly of the coil assembly 120.

[0090] In one embodiment, the guide portion 152 is a protrusion integrally provided with the mounting portion 134 and protruding from one side surface of the mounting portion 134.

[0091] like Figure 3 As shown, the second limiting structure 150 corresponding to the first coil lead-out piece 200a and the second limiting structure 150 corresponding to the third coil lead-out piece 200c respectively also include a second wiring groove 151, each second wiring groove 151 being located on one side of the corresponding guide portion 152 along the first direction X. The enameled wire passes through the second wiring groove 151 corresponding to the first coil lead-out piece 200a before being wound into it and after being wound out of it. The enameled wire passes through the second wiring groove 151 corresponding to the third coil lead-out piece 200c before being wound into it and after being wound out of it.

[0092] The guide portion 152 may be located on the side of the corresponding second wiring groove 151 close to the first winding portion 131; or the guide portion 152 may also be located on the side of the corresponding second wiring groove 151 away from the first winding portion 131.

[0093] In one embodiment, the abutting surface 1521 of the guide portion 152 and the bottom surface of the corresponding second wiring groove 151 face opposite directions and have a height difference. The section of enameled wire that is limited and cooperated with by the second limiting structure 150 corresponding to the first coil lead-out piece 200a is inclined and taut between the abutting surface 1521 of the corresponding guide portion 152 and the bottom surface of the second wiring groove 151. Furthermore, the section of enameled wire that is limited and cooperated with by the second limiting structure 150 corresponding to the third coil lead-out piece 200c is inclined and taut between the abutting surface 1521 of the corresponding guide portion 152 and the bottom surface of the second wiring groove 151. Thus, the enameled wire passes through the corresponding guide portion 152 and the second wiring groove 151 in a bent posture, so that the enameled wire is taut and limited by the second limiting structure 150, avoiding wire breakage during wire throwing or coil assembly 120 assembly.

[0094] like Figure 4 As shown, in one embodiment, the first mounting hole 1311 penetrates the first winding portion 131 along the first direction X, and the second mounting hole 1331 penetrates the second winding portion 133 along the first direction X.

[0095] The number of first mounting holes 1311 can be one or more. When there are multiple first mounting holes 1311, the multiple first mounting holes 1311 can be arranged side by side along the second direction Y and interconnected. Of course, the multiple first mounting holes 1311 can also be arranged side by side along the third direction Z and interconnected; or, the multiple first mounting holes 1311 can be arranged side by side along a direction inclined to the second direction Y and the third direction Z.

[0096] Similarly, the number of second mounting holes 1331 can be one or more. When there are multiple second mounting holes 1331, they can be arranged side by side along the second direction Y and interconnected. Of course, the multiple second mounting holes 1331 can also be arranged side by side along the third direction Z and interconnected; or, the multiple second mounting holes 1331 can be arranged side by side along directions inclined to the second direction Y and the third direction Z.

[0097] When there is one first mounting hole 1311 and one second mounting hole 1331, the axis of the first mounting hole 1311 coincides with the axis of the second mounting hole 1331.

[0098] When there are multiple first mounting holes 1311 and multiple second mounting holes 1331, the axes of the multiple first mounting holes 1311 coincide with the axes of the multiple second mounting holes 1331 respectively.

[0099] Furthermore, the shapes of the first mounting hole 1311 and the second mounting hole 1331 can be any of the following: circular, rectangular, elliptical, or other regular or irregular shapes.

[0100] like Figure 7 As shown, the core 121 is fixedly connected to the yoke 123. For example, in an exemplary embodiment, the core 121 and the yoke 123 are riveted. The shape of the core 121 is adapted to the shape of the first mounting hole 1311 or the second mounting hole 1331. The core 121 is used to concentrate the magnetic field generated after the winding is energized.

[0101] In one embodiment, the core 121 can be an iron core, a ferrite core, an alloy core, etc., and this application does not make any special limitation on it.

[0102] Another aspect of this application provides a winding method for a coil assembly 120, comprising: The step of providing a coil frame 130 includes a first winding portion 131 and a second winding portion 133 arranged along a first direction X. The first winding portion 131 has a first mounting hole, and the second winding portion 133 has a second mounting hole. The axis of the first mounting hole coincides with the axis of the second mounting hole. Both the first mounting hole and the second mounting hole are used to mount the core. A plurality of coil lead pieces 200 are connected to the side of the first winding portion 131 facing away from the second winding portion 133. The plurality of coil lead pieces 200 include a first coil lead piece 200a, a second coil lead piece 200b, and a third coil lead piece 200c. In the winding of the enameled wire, a first winding segment 140a of the enameled wire is used to wind a first winding 141 around the outer periphery of the first winding portion 131, and a second winding 142 is wound around the outer periphery of the second winding portion 133; a third winding 143 is wound around the outer periphery of the first winding portion 131 using a second winding segment 140b of the enameled wire, and a fourth winding 144 is wound around the outer periphery of the second winding portion 133; the two ends of the first winding 141 are electrically connected to the first coil lead 200a and the second coil lead 200b, respectively; the two ends of the second winding 142 are electrically connected to the first coil lead 200a and the second coil lead 200b, respectively; the two ends of the third winding 143 are electrically connected to the second coil lead 200b and the third coil lead 200c, respectively; and the two ends of the fourth winding 144 are electrically connected to the second coil lead 200b and the third coil lead 200c, respectively. In this configuration, the first coil lead 200a and the second coil lead 200b are energized, and the magnetic fields formed by the first winding 141 and the second winding 142 are in the same direction. Similarly, the second coil lead 200b and the third coil lead 200c are energized, and the magnetic fields formed by the third winding 143 and the fourth winding 144 are in the same direction. The first winding segment 140a and the second winding segment 140b are not electrically connected.

[0103] According to the coil assembly 120 formed by the above method, when the first coil lead 200a and the second coil lead 200b are energized, the first winding 141 and the second winding 142 form a first parallel circuit, and the magnetic field they form has the same direction. When the second coil lead 200b and the third coil lead 200c are energized, the third winding 143 and the fourth winding 144 form a second parallel circuit, and the magnetic field they form after being energized has the same direction. Compared to the existing technology that uses one or two windings connected in series, the coil assembly 120 in this embodiment can concentrate the magnetic field formed after the first coil lead 200a and the second coil lead 200b are energized into the center of the first winding 141 and the center of the second winding 142, respectively. After the second coil lead 200b and the third coil lead 200c are energized, the magnetic field formed can concentrate into the center of the third winding 143 and the center of the fourth winding 144, respectively. This makes the magnetic field formed by the coil assembly 120 more concentrated, with less magnetic field attenuation and higher magnetic circuit efficiency. Furthermore, when the coil assembly 120 of this embodiment is engaged with the armature assembly, since the magnetic fields formed by the first winding 141 and the second winding 142 after being energized are in the same direction, that is, the polarities of adjacent magnetic poles in the first winding 141 and the second winding 142 are opposite, and the magnetic fields formed by the third winding 143 and the fourth winding 144 after being energized are in the same direction, that is, the polarities of adjacent magnetic poles in the third winding 143 and the fourth winding 144 are opposite, the coil assembly 120 can form an "attractive and repulsive" force on the armature assembly during the switching process of the armature assembly, making the switching action of the armature assembly faster and improving the reliability of the armature assembly action.

[0104] In one embodiment, the step of winding the enameled wire includes: Connect the entire enameled wire to the first coil lead 200a. The first winding 141 is formed by winding the outer periphery of the first winding portion 131, and after the first winding 141 is formed, the enameled wire is returned to the second coil lead piece 200b and the enameled wire is electrically connected to the second coil lead piece 200b. The enameled wire starts from the second coil lead 200b, winds around the outer periphery of the second winding portion 133 to form the second winding 142, and after forming the second winding 142, the enameled wire is returned to the first coil lead 200a and electrically connected to the first coil lead 200a. The enameled wire starts from the first coil lead 200a and winds to the second coil lead 200b; wherein, the portion of the enameled wire located between the first coil lead 200a and the second coil lead 200b is defined as the portion to be cut 140c. The enameled wire starts from the second coil lead 200b, winds around the outer periphery of the first winding portion 131 to form a third winding 143, and after forming the third winding 143, the enameled wire is returned to the third coil lead 200c and electrically connected to the third coil lead 200c. The enameled wire starts from the third coil lead 200c, winds around the outer periphery of the second winding portion 133 to form the fourth winding 144, and after forming the fourth winding 144, the enameled wire is returned to the second coil lead 200b and electrically connected to the second coil lead 200b. The break portion 140c located between the first coil lead piece 200a and the second coil lead piece 200b is broken so that the first winding segment 140a and the second winding segment 140b form two non-conductive segments.

[0105] In one embodiment, the coil frame 130 further includes an intermediate portion 132 connected between the first winding portion 131 and the second winding portion 133, and the intermediate portion 132 is provided with two first limiting structures 1321; The winding method further includes: starting from the second coil lead-out piece 200b and before forming the second winding 142 around the outer periphery of the second winding portion 133, and starting from the third coil lead-out piece 200c and before forming the fourth winding 144 around the outer periphery of the second winding portion 133, the winding method further includes: crossing the middle portion 132 along the first direction X, and making the enameled wire engage with one of the first limiting structures 1321; After forming the second winding 142 and before returning the enameled wire to the first coil lead 200a, and after forming the fourth winding 144 and before returning the enameled wire to the second coil lead 200b, the winding method further includes: crossing the middle portion 132 along the first direction X, and making the enameled wire engage with another first limiting structure 1321.

[0106] In one embodiment, a second limiting structure 150 is provided next to each coil lead-out piece 200; After the enameled wire is wound out of each coil lead piece and before it is wound into each coil lead piece, the enameled wire is engaged with the second limiting structure 150 corresponding to each coil lead piece.

[0107] Next, combine Figures 8 to 11 The winding method of the coil assembly 120 according to the embodiments of this application is described in detail.

[0108] like Figure 8As shown, the enameled wire is electrically connected to the first coil lead 200a. Starting from the first coil lead 200a, the enameled wire is engaged with the second limiting structure 150 corresponding to the first coil lead 200a, and then wound around the outer periphery of the first winding portion 131 to form the first winding 141. After forming the first winding 141, the enameled wire is engaged with the second limiting structure 150 corresponding to the second coil lead 200b, and finally the enameled wire is returned to the second coil lead 200b and electrically connected to the second coil lead 200b.

[0109] In one embodiment, the first winding segment 140a includes two third extension segments 147. The two third extension segments 147 are respectively limited and engaged with the second limiting structure 150 corresponding to the first coil lead-out piece 200a and the second limiting structure 150 corresponding to the second coil lead-out piece 200b, and are respectively wound around the first coil lead-out piece 200a and the second coil lead-out piece 200b. The two ends of the first winding 141 are integrally connected to the two third extension segments 147.

[0110] like Figure 9 As shown, it should be noted that, in order to clearly show the enameled wire around the outer periphery of the first winding portion 131, the first winding 141 that has been wound around the outer periphery of the first winding portion 131 is omitted.

[0111] The enameled wire starts from the second coil lead 200b, first engages with the second limiting structure 150 corresponding to the second coil lead 200b, and then winds around the outer periphery of the second winding portion 133 to form the second winding 142. After forming the second winding 142, the enameled wire is returned to the first coil lead 200a, and the enameled wire engages with the second limiting structure 150 corresponding to the first coil lead 200a, and the enameled wire is electrically connected to the first coil lead 200a.

[0112] In one embodiment, the first winding segment 140a further includes two first extension segments 145. One end of the second winding 142 is connected to the second coil lead piece 200b through one of the first extension segments 145, and the other end of the second winding 142 is connected to the first coil lead piece 200a through the other first extension segment 145. The two first extension segments 145 are respectively limited and engaged with two first limiting structures 1321.

[0113] Optionally, the enameled wire originates from the second coil lead 200b, and before engaging with one of the first limiting structures 1321, one of the first extension segments 145 is wound around the first winding portion 131 at least one turn. After the second winding 142 is formed, and after a portion of the enameled wire is engaged with the other first limiting structure 1321, and before the enameled wire is electrically connected to the first coil lead 200a, the other first extension segment 145 is wound around the first winding portion 131 at least one turn. By winding the first extension segment 145 around the first winding portion 131 at least one turn, the enameled wire can be tightened.

[0114] like Figure 10 As shown, it should be noted that, in order to clearly show the third winding 143 around the outer periphery of the first winding portion 131, the first winding 141 that is already wrapped around the outer periphery of the first winding portion 131 is omitted.

[0115] The enameled wire starts from the first coil lead 200a and winds onto the second coil lead 200b. The portion of the enameled wire located between the first coil lead 200a and the second coil lead 200b is defined as the portion to be cut 140c.

[0116] The enameled wire starts from the second coil lead 200b. After the enameled wire is engaged with the second limiting structure 150 corresponding to the second coil lead 200b, it is wound around the outer periphery of the first winding portion 131 to form the third winding 143. After the third winding 143 is formed, the enameled wire is engaged with the second limiting structure 150 corresponding to the third coil lead 200c, and then returned to the third coil lead 200c, and the enameled wire is electrically connected to the third coil lead 200c.

[0117] In one embodiment, the second winding segment 140b further includes two fourth extension segments 148. The two fourth extension segments 148 are respectively limited and engaged with the second limiting structure 150 corresponding to the second coil lead piece 200b and the second limiting structure 150 corresponding to the third coil lead piece 200c, and are respectively wound on the second coil lead piece 200b and the third coil lead piece 200c. The two ends of the third winding 143 are respectively integrally connected to the two fourth extension segments 148.

[0118] like Figure 11 As shown, it should be noted that, in order to clearly show the fourth winding 144 around the second winding portion 133, the second winding 142 that is already wrapped around the second winding portion 133 is omitted.

[0119] The enameled wire starts from the third coil lead 200c, first engaging with the second limiting structure 150 corresponding to the third coil lead 200c, then traversing the first winding portion 131 and the middle portion 132 along the first direction X, and finally winding around the outer periphery of the second winding portion 133 to form the fourth winding 144. After forming the fourth winding 144, it traverses the middle portion 132 and the first winding portion 131 along the first direction X to return the enameled wire to the second coil lead 200b, and electrically connects the enameled wire to the second coil lead 200b.

[0120] Finally, the section 140c located between the first coil lead 200a and the second coil lead 200b is broken so that the first winding segment 140a and the second winding segment 140b form two non-conductive segments.

[0121] In one embodiment, the second winding segment 140b further includes two second extension segments 146. One end of the fourth winding 144 is connected to the second coil lead 200b via one of the second extension segments 146, and the other end of the fourth winding 144 is connected to the third coil lead 200c via the other second extension segment 146; the two second extension segments 146 are respectively limited and engaged with the two first limiting structures 1321.

[0122] In one embodiment, each third extension 147 and each fourth extension 148 abuts against the abutting surface 1521 of the corresponding guide portion 152.

[0123] In one embodiment, the third extension 147 wound around the first coil lead piece 200a is defined as the first outer extension, which passes through the second wiring groove 151 corresponding to the first coil lead piece 200a. The fourth extension 148 wound around the third coil lead piece 200c is defined as the second outer extension, which passes through the second wiring groove 151 corresponding to the third coil lead piece 200c.

[0124] In one embodiment, the first outer extension and the second outer extension are respectively inclined and stretched between the abutment surface 1521 of the corresponding guide portion 152 and the bottom surface of the second wiring groove 151.

[0125] In summary, the coil assembly, relay, and coil assembly winding method of the embodiments of this application have at least the following advantages and beneficial effects: In this embodiment of the coil assembly, when the first and second coil leads are energized, the first and second windings form a first parallel circuit, and the resulting magnetic fields are in the same direction. When the second and third coil leads are energized, the third and fourth windings form a second parallel circuit, and the resulting magnetic fields are in the same direction. Compared to the prior art's arrangement of one or two windings in series, the coil assembly of this embodiment allows the magnetic fields formed after the first and second coil leads are energized to be concentrated at the centers of the first and second windings, respectively. Furthermore, the magnetic fields formed after the second and third coil leads are energized are concentrated at the centers of the third and fourth windings, respectively. This results in a more concentrated magnetic field, less magnetic field attenuation, and higher magnetic circuit efficiency for the entire coil assembly. Furthermore, when the coil assembly and the armature assembly of this embodiment are engaged, since the magnetic fields formed by the first winding and the second winding after being energized are in the same direction (i.e., the polarities of adjacent magnetic poles in the first winding and the second winding are opposite), and the magnetic fields formed by the third winding and the fourth winding after being energized are in the same direction (i.e., the polarities of adjacent magnetic poles in the third winding and the fourth winding are opposite), the coil assembly can generate an attraction and repulsion force on the armature assembly during the switching process of the armature assembly, making the switching action of the armature assembly faster and improving the reliability of the armature assembly action.

[0126] It is understood that the various embodiments / implementations provided in this application can be combined with each other without creating contradictions, and will not be described one by one here.

[0127] In the embodiments of this application, the term "multiple" refers to two or more, unless otherwise explicitly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0128] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the claims. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0129] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. A coil assembly, characterized in that, include: A coil frame includes a first winding portion and a second winding portion arranged along a first direction. The first winding portion has a first mounting hole, and the second winding portion has a second mounting hole. The axis of the first mounting hole coincides with the axis of the second mounting hole. Both the first mounting hole and the second mounting hole are used to mount a core. Multiple coil lead-out pieces are connected to the side of the first winding portion facing away from the second winding portion; the multiple coil lead-out pieces include a first coil lead-out piece, a second coil lead-out piece, and a third coil lead-out piece; The enameled wire includes a first winding segment and a second winding segment that are not electrically connected to each other. The first winding segment includes a first winding wound on the first winding portion and a second winding wound on the second winding portion. The two ends of the first winding are electrically connected to the first coil lead and the second coil lead, respectively. The two ends of the second winding are also electrically connected to the first coil lead and the second coil lead, respectively. When the first coil lead and the second coil lead are energized, the first winding and the second winding form a first parallel circuit, and the magnetic fields generated by the first winding and the second winding after being energized are in the same direction. The second winding segment includes a third winding wound on the first winding portion and a fourth winding wound on the second winding portion; the two ends of the third winding are electrically connected to the second coil lead and the third coil lead, respectively, and the two ends of the fourth winding are electrically connected to the second coil lead and the third coil lead, respectively; wherein, when the second coil lead and the third coil lead are energized, the third winding and the fourth winding form a second parallel circuit, and the magnetic fields formed by the third winding and the fourth winding are in the same direction.

2. The coil assembly according to claim 1, characterized in that, The magnetic field direction formed by the first winding and the second winding after being energized is opposite to the magnetic field direction formed by the third winding and the fourth winding after being energized.

3. The coil assembly according to claim 1, characterized in that, The first coil lead, the second coil lead, and the third coil lead are arranged side by side along a second direction, which is perpendicular to the first direction.

4. The coil assembly according to claim 3, characterized in that, The second coil lead is located between the first coil lead and the third coil lead.

5. The coil assembly according to claim 1, characterized in that, The coil frame further includes an intermediate portion connected between the first winding portion and the second winding portion. The intermediate portion is provided with two first limiting structures, each of which engages with at least one limiting structure of the first winding segment and the second winding segment.

6. The coil assembly according to claim 5, characterized in that, The first winding segment further includes two first extension segments. One end of the second winding is electrically connected to the second coil lead through one of the first extension segments, and the other end of the second winding is electrically connected to the first coil lead through the other first extension segment. The two first extension segments are respectively limited and engaged with the two first limiting structures. The second winding segment also includes two second extension segments. One end of the fourth winding is electrically connected to the second coil lead through one of the second extension segments, and the other end of the fourth winding is electrically connected to the third coil lead through the other second extension segment. The two second extension segments are respectively limited and engaged with the two first limiting structures.

7. The coil assembly according to claim 5, characterized in that, The middle part is provided with the first limiting structure at both ends along the second direction, and the second direction is perpendicular to the first direction.

8. The coil assembly according to claim 5, characterized in that, The two first limiting structures are located on the same side of the middle portion.

9. The coil assembly according to claim 5, characterized in that, The first limiting structure includes a first wiring groove, and at least one of the first winding segment and the second winding segment passes through the corresponding first wiring groove.

10. The coil assembly according to claim 9, characterized in that, The openings of the two first wiring channels face the same direction.

11. The coil assembly according to claim 1, characterized in that, The first winding portion has a plurality of second limiting structures on the side opposite to the second winding portion, and the positions of the plurality of second limiting structures correspond to the positions of the plurality of coil lead pieces respectively; The first winding segment further includes two third extension segments. The two third extension segments are respectively limited and cooperated with the second limiting structure corresponding to the first coil lead piece and the second limiting structure corresponding to the second coil lead piece, and are respectively wound on the first coil lead piece and the second coil lead piece. The two ends of the first winding are respectively integrally connected to the two third extension segments. The second winding segment also includes two fourth extension segments. The two fourth extension segments are respectively limited and cooperated with the second limiting structure corresponding to the second coil lead piece and the second limiting structure corresponding to the third coil lead piece, and are respectively wound on the second coil lead piece and the third coil lead piece. The two ends of the third winding are respectively integrally connected to the two fourth extension segments.

12. The coil assembly according to claim 11, characterized in that, Each of the second limiting structures includes a guide portion, the guide portion having a supporting surface, and each of the third extensions and each of the fourth extensions respectively abutting against the supporting surface of the corresponding guide portion.

13. The coil assembly according to claim 12, characterized in that, The second limiting structure corresponding to the first coil lead-out piece and the second limiting structure corresponding to the third coil lead-out piece respectively further include a second wiring groove, and each second wiring groove is located on one side of the corresponding guide portion along the first direction; The third extension section wound around the first coil lead piece is defined as the first outer extension section, and the first outer extension section passes through the second wiring groove corresponding to the first coil lead piece. The fourth extension section wound around the third coil lead piece is defined as the second outer extension section, and the second outer extension section passes through the second wiring groove corresponding to the third coil lead piece.

14. The coil assembly according to claim 13, characterized in that, The abutting surface of the guide part faces opposite to the bottom surface of the corresponding second wiring groove, and there is a height difference between them; The first outer extension and the second outer extension are respectively inclined and stretched between the abutting surface of the corresponding guide and the bottom surface of the second wiring groove.

15. The coil assembly according to claim 11, characterized in that, A plurality of mounting portions are provided on the side of the first winding portion facing away from the first winding portion, and a plurality of coil lead pieces are mounted on the plurality of mounting portions in a corresponding manner, and a plurality of second limiting structures are provided on the plurality of mounting portions in a corresponding manner.

16. A relay, characterized in that, Includes the coil assembly as described in any one of claims 1-15.

17. The relay according to claim 16, characterized in that, It also includes an armature assembly, which is located on one side of the coil frame of the coil assembly along a third direction, the third direction being perpendicular to the first direction; the armature assembly includes an armature and a permanent magnet, the permanent magnet being fixed to the side of the armature facing the coil frame along the third direction; The first winding section and the second winding section of the coil frame are respectively connected to yokes on opposite sides. The first winding section and the second winding section are respectively provided with cores. Each yoke is connected to the corresponding core. The coil assembly is configured to drive the armature assembly to be movably disposed between the two yokes along the first direction in response to an input signal.

18. The relay according to claim 17, characterized in that, The armature assembly further includes a magnetic conductor, the armature being fixed to the first magnetic pole of the permanent magnet, and the magnetic conductor being fixed to the second magnetic pole of the permanent magnet. The first magnetic pole and the second magnetic pole are positioned opposite each other and have opposite polarities. The magnetic conductor is located between the two cores.

19. The relay according to claim 17, characterized in that, The magnetization direction of the permanent magnet is the third direction.

20. A method for winding a coil assembly, characterized in that, include: A coil frame is provided, the coil frame including a first winding portion and a second winding portion arranged along a first direction, the first winding portion having a first mounting hole, the second winding portion having a second mounting hole, the axis of the first mounting hole coinciding with the axis of the second mounting hole, both the first mounting hole and the second mounting hole being used to mount a core; wherein, a plurality of coil lead-out pieces are connected to the side of the first winding portion opposite to the second winding portion, the plurality of coil lead-out pieces including a first coil lead-out piece, a second coil lead-out piece and a third coil lead-out piece; In the step of winding enameled wire, a first winding is wound around the outer periphery of the first winding portion using a first winding segment of the enameled wire, and a second winding is wound around the outer periphery of the second winding portion. A third winding is wound around the outer periphery of the first winding portion using a second winding segment of the enameled wire, and a fourth winding is wound around the outer periphery of the second winding portion. The two ends of the first winding are electrically connected to the first coil lead and the second coil lead, respectively. The two ends of the second winding are also electrically connected to the first coil lead and the second coil lead, respectively. The two ends of the third winding are also electrically connected to the second coil lead and the third coil lead, respectively. When the first and second coil leads are energized, the magnetic fields formed by the first and second windings are in the same direction. When the second and third coil leads are energized, the magnetic fields formed by the third and fourth windings are in the same direction. The first winding segment and the second winding segment are not electrically connected to each other.

21. The winding method according to claim 20, characterized in that, The magnetic field direction formed by the first winding and the second winding after being energized is opposite to the magnetic field direction formed by the third winding and the fourth winding after being energized.

22. The winding method according to claim 20, characterized in that, The step of winding the enameled wire includes: Connect the entire enameled wire to the lead-out piece of the first coil; The first winding is formed by winding the outer periphery of the first winding portion, and after forming the first winding, the enameled wire is returned to the second coil lead piece and the enameled wire is electrically connected to the second coil lead piece; The enameled wire starts from the second coil lead piece, winds around the outer periphery of the second winding portion to form the second winding, and after forming the second winding, the enameled wire is returned to the first coil lead piece and electrically connected to the first coil lead piece; The enameled wire starts from the first coil lead and winds around to the second coil lead; The enameled wire starts from the second coil lead piece, winds around the outer periphery of the first winding portion to form the third winding, and after forming the third winding, the enameled wire is returned to the third coil lead piece and electrically connected to the third coil lead piece; Starting from the third coil lead piece, the fourth winding is formed by winding around the outer periphery of the second winding portion. After forming the fourth winding, the enameled wire is returned to the second coil lead piece and electrically connected to the second coil lead piece. The enameled wire between the first coil lead and the second coil lead is cut off so that the first winding segment and the second winding segment form two non-conductive wire segments.

23. The winding method according to claim 22, characterized in that, The coil frame also includes an intermediate section connected between the first winding section and the second winding section, and the intermediate section is provided with two first limiting structures; Starting from the second coil lead piece and before forming the second winding around the outer periphery of the second winding portion, and starting from the third coil lead piece and before forming the fourth winding around the outer periphery of the second winding portion, the winding method further includes: crossing the middle portion of the enameled wire in a first direction and making the enameled wire engage with one of the first limiting structures. After forming the second winding and before returning the enameled wire to the first coil lead, and after forming the fourth winding and before returning the enameled wire to the second coil lead, the winding method further includes: crossing the middle portion of the enameled wire along the first direction and positioning the enameled wire in a limiting engagement with another first limiting structure.

24. The winding method according to claim 22, characterized in that, Each of the coil lead-out pieces is provided with a second limiting structure; After the enameled wire is wound out of each of the coil leads and before it is wound into each of the coil leads, the enameled wire is engaged with the second limiting structure corresponding to each of the coil leads.

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