Coil unit and electromagnetic relay

Abstract

The utility model provides a coil unit and an electromagnetic relay. The coil unit includes a bobbin, a first terminal, and a wire. The first terminal includes: a first base portion; and a first protruding portion protruding upward or downward from the right side surface of the first base portion, the first protruding portion including: a first protruding portion connected to the right side surface of the first base portion; a second protruding portion connected to the first protruding portion and having a width in the front-rear direction greater than that of the first protruding portion; and a third protruding portion connected to the second protruding portion and having a width smaller than that of the second protruding portion in the front-rear direction, the first end portion of the conductive wire including: a first portion wound around the third protruding portion; a second portion connected to the first portion and bent along the first protruding portion; and a third portion connected to the second portion and extending toward the left side surface of the shaft portion of the bobbin. Therefore, the possibility of short circuit and wire breakage caused by the fact that the wire extends towards the magnet yoke can be reduced.

Description

Technical Field

[0001] This utility model relates to coil units and electromagnetic relays. Background Technology

[0002] Japanese Patent Application Publication No. JP2009199893A (Patent Document 1) discloses an electromagnetic relay comprising a fixed terminal, a movable contact, and a coil unit. The movable contact moves and contacts the fixed terminal due to the magnetic field generated when the coil unit is energized. The coil unit has a coil frame and a winding terminal disposed on the coil frame. The two ends of a wire wound around the coil frame are respectively wound around a protrusion of the winding terminal and soldered to the protrusion, which is then bent. A magnetic yoke for forming a magnetic circuit is provided on the outer periphery of the coil unit.

[0003] In Patent Document 1, in order to generate the magnetic force that moves the movable contact toward the fixed terminal, a magnetic yoke is required on the side where the protruding piece of the winding terminal of the coil unit is located. However, when the protruding piece is bent, a slack portion may form in the wire near the protruding piece, and this portion may protrude toward the magnetic yoke. If the protruding portion of the wire comes into contact with the magnetic yoke, a short circuit may occur, posing a safety hazard. Furthermore, if the protruding portion of the wire gets caught on other components during installation, there is a risk of wire breakage.

[0004] Furthermore, in Patent Document 1, depending on the winding direction of the wires on the coil frame, there is a possibility of applying tension to the wires when bending the protruding piece, which may also lead to wire breakage. Utility Model Content

[0005] Problems to be solved by utility models

[0006] This invention was made in view of the above-mentioned situation, and one object of it is to provide a coil unit and an electromagnetic relay that can reduce the possibility of short circuits and wire breaks caused by the wires extending toward the yoke.

[0007] Another objective of this invention is to provide a coil unit and an electromagnetic relay that can reduce the possibility of wire breakage due to bending of the protruding tab.

[0008] Solution for solving the problem

[0009] This utility model provides a coil unit, comprising: a coil frame having a shaft portion; a first terminal disposed on the coil frame; a wire having a first end electrically connected to the first terminal, a winding portion electrically connected to the first end and wound around the shaft portion of the coil frame, and a second end electrically connected to the winding portion; and a second terminal electrically connected to the second end and electrically connected to the first terminal via the wire, the first terminal comprising: a first base portion; and a first protrusion portion protruding upward or downward from the right side of the first base portion, the first protrusion portion comprising: a first protruding portion, which is connected to the first base portion. The first end of the conductor includes: a first portion that is wound around the third protrusion of the first protrusion; a second portion that is connected to the first portion and bends along the first protrusion; and a third portion that is connected to the second portion and extends toward the left side of the shaft of the coil frame.

[0010] According to this structure, the first end of the conductor includes a first portion wound around the third protrusion and a second portion connected to the first portion and bent along the first protrusion, thus the first end of the conductor extends across the second protrusion. Since the width of the second protrusion in the front-rear direction is greater than the widths of the first and third protrusions in the front-rear direction, when the first protrusion is bent towards the side where the coil frame is located, causing it to protrude upwards or downwards from the first base of the first terminal, even if a slack portion forms at the third portion of the first end of the conductor and this portion extends to the right beyond the first protrusion from the front and / or rear side, the larger width of the second protrusion in the front-rear direction can block the extension of the conductor, thereby preventing the conductor from extending to the right and contacting the yoke or getting caught with other components. This reduces the possibility of short circuits or wire breaks due to the conductor extending towards the yoke.

[0011] Preferably, the winding portion of the conductor includes: a first connecting portion connected to the third portion of the first end and bent along the axis of the coil frame; and a second connecting portion connected to the second end and bent along the axis of the coil frame, wherein the first connecting portion is located inside the winding portion than the second connecting portion.

[0012] According to this structure, since the first connecting portion of the winding portion is located inside the winding portion compared to the second connecting portion, the first connecting portion is tightly bound by the other winding portions of the wire and is difficult to move. Moreover, since the first connecting portion is connected to the third portion of the first end of the wire, when the first protrusion is bent toward the side where the coil frame is located and protrudes upward or downward from the first base of the first terminal, the slack generated at the third portion of the first end of the wire is not easily absorbed by the first connecting portion (that is, the slack portion of the wire tends to extend to the right). Therefore, the effect of using the second protrusion of the first protrusion to block the extension of the wire is more significant.

[0013] Preferably, the first connecting portion is located at the innermost side of the winding portion.

[0014] According to this structure, since the first connecting part is located at the innermost side of the winding part, it is more difficult for the first connecting part to move, and the slack generated at the third part of the first end of the wire is less likely to be absorbed by the first connecting part. Therefore, the effect of using the second protruding part of the first protrusion to block the extension of the wire is more significant.

[0015] Preferably, the winding portion of the conductor includes: a first connecting portion connected to the third portion of the first end and bent along the outer periphery of the coil frame; and a second connecting portion connected to the second end and bent along the outer periphery of the coil frame, wherein the distance between the first connecting portion and the shaft portion of the coil frame is less than the distance between the second connecting portion and the shaft portion of the coil frame.

[0016] According to this structure, since the distance between the first connecting part and the shaft of the coil frame is less than the distance between the second connecting part and the shaft of the coil frame, the first connecting part is located closer to the shaft of the coil frame than the second connecting part. The first connecting part is tightly secured by the other winding portions of the conductor, making it difficult to move. Therefore, the slack generated at the third portion of the first end of the conductor is not easily absorbed by the first connecting part, thus the effect of using the second protruding portion of the first protrusion to block the extension of the conductor is more significant.

[0017] Preferably, when viewed along the wire from the third portion toward the first portion at the first end of the wire, the wire passes the right side of the first protrusion of the first protrusion, then the left side of the first protrusion, and reaches the third protrusion.

[0018] According to this structure, when the first protrusion is bent toward the side where the coil frame is located and protrudes upward or downward from the first base of the first terminal, even if a slack portion is generated at the third part of the first end of the wire and this portion is about to extend to the right side past the first protrusion from the front and / or rear side, the extension of the wire can be blocked by the second protrusion, which has a larger width in the front-rear direction.

[0019] Preferably, when viewed along the wire from the third portion of the first end of the wire toward the first portion, the wire passes the right side of the first protrusion of the first protrusion, then the left side of the second protrusion of the first protrusion, and reaches the third protrusion.

[0020] According to this structure, when the first protrusion is bent toward the side where the coil frame is located and protrudes upward or downward from the first base of the first terminal, even if a slack portion is generated at the third part of the first end of the wire and this portion is about to extend to the right side past the first protrusion from the front and / or rear side, the extension of the wire can be blocked by the second protrusion, which has a larger width in the front-rear direction.

[0021] Preferably, the coil frame further has a flange portion connected to the shaft portion and located below the third portion of the first end of the conductor. The first protrusion of the first terminal protrudes upwards from the first base portion. The left side of the second protrusion of the first protrusion is opposite to the right side of the flange portion. The upper end face of the second protrusion of the first protrusion is located at the same height as the upper surface of the flange portion or at a position higher than the upper surface of the flange portion.

[0022] According to this structure, since the flange of the coil frame is located below the third part of the first end of the conductor, and the upper surface of the second protrusion is located at the same height as the upper surface of the flange or at a position higher than the upper surface of the flange, the second protrusion, which has a larger width in the front-rear direction, can reliably block the slack portion generated at the third part of the first end of the conductor from extending to the right, thereby more reliably reducing the possibility of short circuits and wire breaks.

[0023] Preferably, the second terminal includes: a second base; and a second protrusion protruding upward or downward from the left side of the second base, the second protrusion including: a fourth protrusion connected to the left side of the second base; a fifth protrusion connected to the fourth protrusion, the front-rear width of the fifth protrusion being greater than the front-rear width of the fourth protrusion; and a sixth protrusion connected to the fifth protrusion, the front-rear width of the sixth protrusion being less than the front-rear width of the fifth protrusion, the second end of the conductor including: a fourth portion wound around the sixth protrusion of the second protrusion; a fifth portion connected to the fourth portion and bent along the fourth protrusion; and a sixth portion connected to the fifth portion and extending toward the right side of the shaft of the coil frame.

[0024] According to this structure, since the second protrusion includes a fifth protrusion with a larger width in the front-to-back direction, similarly to the first protrusion, the fifth protrusion of the second protrusion can block the slack portion generated at the sixth portion of the second end of the wire from extending to the left, thereby preventing the wire from extending to the left and contacting the yoke. Therefore, regardless of whether the wire is wound from the first terminal or the second terminal, the possibility of a short circuit due to the wire extending towards the yoke can be reliably reduced, thereby reliably improving the safety of the device.

[0025] Preferably, the winding portion of the conductor includes: a first connecting portion connected to the third portion of the first end and bent along the axis of the coil frame; and a second connecting portion connected to the sixth portion of the second end and bent along the axis of the coil frame, wherein the first connecting portion is located inside the winding portion than the second connecting portion, and the second connecting portion is located on the outermost side of the winding portion.

[0026] According to this structure, since the first connecting portion of the winding section is located inside the winding section compared to the second connecting portion, the first connecting portion is tightly secured by the other winding portions of the wire and is difficult to move. Furthermore, since the first connecting portion is connected to the third portion of the first end of the wire, slack generated at the third portion of the first end of the wire is not easily absorbed by the first connecting portion, and the effect of blocking the wire's extension by the second protruding portion of the first protrusion is more significant. In addition, since the second connecting portion is located on the outermost side of the winding section and is not subject to the clamping force from the coil, the second connecting portion is easy to move. Therefore, slack generated at the sixth portion of the second end of the wire is easily absorbed by the movement of the second connecting portion, thereby more reliably suppressing the wire from extending towards the side opposite to the coil frame (i.e., the side where the yoke is located).

[0027] Preferably, when viewed along the wire from the sixth portion of the second end toward the fourth portion, the wire passes the left side of the fourth protrusion of the second protrusion, then the right side of the second protrusion, and reaches the sixth protrusion.

[0028] According to this structure, the slack portion generated at the 6th part of the 2nd end of the conductor can be blocked by the 5th protrusion of the 2nd protrusion to the left, thereby suppressing the occurrence of short circuits or wire breaks caused by the conductor extending to the left.

[0029] Preferably, when viewed along the wire from the sixth portion of the second end toward the fourth portion, the wire passes the left side of the fourth protrusion of the second protrusion, then the right side of the fifth protrusion of the second protrusion, and reaches the sixth protrusion.

[0030] According to this structure, the slack portion generated at the 6th part of the 2nd end of the conductor can be blocked by the 5th protrusion of the 2nd protrusion to the left, thereby suppressing the occurrence of short circuits or wire breaks caused by the conductor extending to the left.

[0031] Another technical solution of this utility model provides a coil unit, the coil unit comprising: a coil frame having a shaft portion; a first terminal disposed on the coil frame; a wire having a first end electrically connected to the first terminal, a winding portion electrically connected to the first end and wound around the shaft portion of the coil frame, and a second end electrically connected to the winding portion; and a second terminal electrically connected to the second end and electrically connected to the first terminal via the wire, the first terminal comprising: a first base portion; and a first protrusion portion protruding upward or downward from the right side of the first base portion, the first end portion of the wire extending from the portion wound around the first protrusion portion toward the left side of the shaft portion of the coil frame.

[0032] According to this structure, since the first protrusion protrudes from the right side of the first base toward the top or bottom through bending, the first end of the wire extends toward the left side of the shaft of the coil frame after being wound around the first protrusion. Therefore, when the first protrusion is bent toward the side (left side) where the coil frame is located, no tension is applied to the wire, which can reduce the possibility of wire breakage due to bending the protrusion.

[0033] Preferably, the second terminal includes: a second base; and a second protrusion that protrudes upward or downward from the left side of the second base, and the second end of the wire extends from the portion wound around the second protrusion toward the right side of the shaft portion of the coil frame.

[0034] According to this structure, since the second protrusion protrudes from the left side of the second base toward the top or bottom through bending, the second end of the wire extends toward the right side of the coil frame shaft after being wound around the second protrusion. Therefore, when the second protrusion is bent toward the side (right side) where the coil frame is located, no tension is applied to the wire, and wire breakage can be reliably avoided.

[0035] Another technical solution of this utility model provides an electromagnetic relay, which includes: a fixed terminal; a movable contact that is movable between a first position in contact with the fixed terminal and a second position not in contact with the fixed terminal; and a magnetic circuit unit for moving the movable contact from the second position toward the first position, the magnetic circuit unit having: a coil unit as described in any one of the above, which generates a magnetic field for moving the movable contact from the second position toward the first position; and a magnetic yoke including a wall portion disposed on the right side of the coil unit.

[0036] Based on this structure, the electromagnetic relay of this invention can achieve the same effect as the coil unit described above.

[0037] Effects of the utility model

[0038] According to this invention, a coil unit and an electromagnetic relay can be provided that can improve the safety of the device by reducing the possibility of short circuits caused by the wires extending toward the yoke.

[0039] According to this invention, a coil unit and an electromagnetic relay can also be provided that can reduce the possibility of wire breakage due to bending of the protruding piece. Attached Figure Description

[0040] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of the present invention together with the specification and serve to explain the principles of the present invention.

[0041] Figure 1 This is a schematic perspective view of the appearance of an electromagnetic relay according to one embodiment of the present invention.

[0042] Figure 2 This is a schematic diagram of the internal structure of an electromagnetic relay according to one embodiment of the present invention.

[0043] Figure 3This is a perspective view of the coil frame of a coil unit according to one embodiment of the present invention.

[0044] Figure 4 This indicates that the first and second terminals are mounted on the coil holder and are in contact with... Figure 3 Compared to a three-dimensional image showing the coil frame upside down.

[0045] Figure 5 This is a perspective view showing the state of the first terminal after the first protrusion has been bent.

[0046] Figure 6 This is a perspective view of a coil unit according to one embodiment of the present invention.

[0047] Figure 7 yes Figure 6 An enlarged view of the portion shown in the box on the right.

[0048] Figure 8 It shows the inclusion from another perspective Figure 6 A magnified view of the portion shown in the box on the right.

[0049] Figure 9 yes Figure 6 An enlarged view of the portion shown in the box on the left.

[0050] Figure 10 This is a schematic diagram of a modified example of the internal structure of an electromagnetic relay according to one embodiment of the present invention.

[0051] Explanation of reference numerals in the attached figures

[0052] 1: Electromagnetic relay; 2: Fixed terminal; 3: Movable contact; 4: Magnetic circuit unit; 40: Coil unit; 41: Movable iron core; 42: Lower yoke; 43: Rod; 45: Upper yoke; 5: Coil frame; 51, 52: Flange; 52a: Recess; 6: First terminal; 60: First base; 61: Insertion; 62: First protrusion; 62a: First protruding part; 62b: Second protruding part; 62c: Third protruding part; 7: The 2 terminals; 70: second base; 72: second protrusion; 72a: fourth protrusion; 72b: fifth protrusion; 72c: sixth protrusion; A: shaft; W: wire; W1: first end; W11: first part; W12: second part; W13: third part; W2: second end; W21: fourth part; W22: fifth part; W23: sixth part; W3: winding part; W31: first connecting part; W32: second connecting part. Detailed Implementation

[0053] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Common elements in the embodiments described below are labeled with the same reference numerals, and repeated descriptions of common elements are omitted. The following embodiments are merely one of various embodiments of the present invention. Various modifications can be made to the embodiments, depending on the design, etc., as long as the purpose of the present invention is achieved. The figures described in this invention are schematic, and the size ratios of the constituent elements in each figure are not necessarily intended to reflect actual size ratios. Furthermore, the arrows indicating directions are examples and are not intended to limit the direction of use of the electromagnetic relay 1.

[0054] (1. Overall)

[0055] Figure 1 The electromagnetic relay 1 shown is, for example, equipped in an electric vehicle. The electromagnetic relay 1, for example, switches whether current is supplied to the motor from the power source of the electric vehicle.

[0056] like Figure 1 and Figure 2 As shown, the electromagnetic relay 1 includes a fixed terminal 2, a movable contact 3, and a magnetic circuit unit 4. The fixed terminal 2 is formed of a conductive metal or similar material, and its lower end face forms a fixed contact. The movable contact 3 is an elongated strip extending in the left-right direction and is also formed of a conductive metal or similar material. The portion of the movable contact 3 opposite to the fixed contact of the fixed terminal 2 forms a movable contact that can contact and separate from the fixed contact. The magnetic circuit unit 4 enables the movable contact 3 to contact and separate from the fixed terminal 2; that is, the movable contact 3 can be in a first position (not shown) in contact with the fixed terminal 2 and a second position (see reference 4) not in contact with the fixed terminal 2. Figure 2 The magnetic circuit unit 4 is used to move the movable contact 3 from the second position to the first position.

[0057] Specifically, the magnetic circuit unit 4 includes a coil unit 40, a movable iron core 41, a lower magnetic yoke 42 (sometimes also called a "magnetic yoke"), a rod 43, an upper magnetic yoke 45, and a return spring (not shown). The movable iron core 41 is connected to the rod 43, and the rod 43 is directly or indirectly connected to the movable contact 3. The return spring is installed between the upper magnetic yoke 45 and the movable iron core 41, applying force to the movable iron core 41 to separate the movable contact 3 from the fixed terminal 2 when the coil unit 40 is not energized (at this time, the movable contact 3 is in the second position).

[0058] When the coil unit 40 is energized, it generates a magnetic field that moves the movable contact 3 from the second position to the first position. The lower yoke 42 and the upper yoke 45 together form a magnetic circuit through which the magnetic field generated by the coil unit 40 passes. Specifically, when the coil unit 40 is energized, the movable iron core 41 moves the rod 43 upward against the force of the return spring under the magnetic force generated by the coil unit 40, thereby bringing the movable contact 3 into contact with the fixed terminal 2 (at this time, the movable contact 3 is in the first position), and the fixed terminals 2 are electrically connected to each other. When the energization of the coil unit 40 is stopped, the movable iron core 41 moves the rod 43 and the movable contact 3 downward under the elastic restoring force of the return spring, thereby separating the movable contact 3 from the fixed terminal 2, making the fixed terminals 2 disconnected from each other.

[0059] (2. Coil Unit)

[0060] The specific structure of coil unit 40 will be described below.

[0061] like Figures 2-6 As shown, the coil unit 40 includes a coil frame 5 having a shaft A, a first terminal 6 and a second terminal 7 provided on the coil frame 5, and a wire W wound around the shaft A of the coil frame 5.

[0062] (2-1. Coil Frame)

[0063] like Figure 2 and Figure 3 As shown, the shaft A of the coil frame 5 is, for example, a hollow cylindrical shape. A movable iron core 41, capable of moving up and down, is arranged on the inner circumference of the hollow cylindrical portion of the coil frame 5. A rod 43 protruding upwards is fixed at the center of the movable iron core 41. Lower magnetic yokes 42 are arranged below and on the left and right sides of the coil frame 5. The lower magnetic yokes 42 are roughly C-shaped, opening upwards and to the front and rear sides. An upper magnetic yoke 45 is fixed to the upper end of the lower magnetic yoke 42.

[0064] The coil frame 5 has flange portions 51 protruding radially outward at both its upper and lower ends, and flange portions 52 protruding radially outward at approximately the center of the coil frame 5 in the vertical direction. The flange portions 51 and 52 are approximately circular, with at least a partial arc-shaped outline. Recesses 52a are provided on the left and right sides of the front end of the flange portion 52, recessed rearward.

[0065] like Figure 4 As shown, the first terminal 6 and the second terminal 7 are fixed to the recess 52a by inserting them into the recess 52a, for example, by pressing or bonding. It is understood that the structure of the coil holder 5 is not limited to... Figure 3 The structure shown, consisting of two layers of winding, can also be a structure where the winding is done without layers in the vertical direction.

[0066] (2-2. Terminal 1)

[0067] like Figure 4 As shown, the first terminal 6 is formed into a generally flat plate shape using a conductive material such as copper, and has a plate-shaped first base 60. An insertion portion 61 extending rearward is integrally provided on the left side of the rear end portion of the first base 60. The width of the insertion portion 61 in the left-right direction is narrower than the width of the first base 60 in the left-right direction, and it is used for insertion into the recess 52a of the flange portion 52. A columnar first protrusion 62 is integrally provided on the right side surface of the first base 60 (specifically, the right side surface of the rear end portion of the first base 60). Before the wire W is wound, the first protrusion 62 is as follows... Figure 4 As shown, it protrudes to the right from the right side of the first base 60. In the actual use state of the coil unit 40 after the wire W has been wound, the first protrusion 62 is bent to the left as shown. Figure 5 As shown, it protrudes downward from the right side of the first base 60.

[0068] It should be noted that in the actual use of the coil unit 40, the first protrusion 62 is not limited to protruding downwards; it can also protrude upwards, as long as it allows for winding of the wire W. For example, Figure 10 The diagram shows a schematic structure of a modified example in which the first protrusion 62 protrudes upward.

[0069] like Figure 2 As shown, there is a right side wall portion of the lower magnetic yoke 42 on the right side of the first terminal 6 of the coil unit 40.

[0070] like Figure 5 As shown, the first protrusion 62 includes: a first protrusion 62a connected to the right side of the first base 60; a second protrusion 62b connected to the first protrusion 62a, and having a width in the front-rear direction greater than the width in the front-rear direction of the first protrusion 62a; and a third protrusion 62c connected to the second protrusion 62b, and having a width in the front-rear direction less than the width in the front-rear direction of the second protrusion 62b.

[0071] (2-3. Terminal 2)

[0072] like Figure 4As shown, the second terminal 7, like the first terminal 6, is formed into a generally flat plate using a conductive material such as copper, and has a plate-shaped second base 70. An insertion portion (not shown) extending rearward is integrally provided on the right side of the rear end portion of the second base 70. The width of this insertion portion in the left-right direction is narrower than the width of the second base 70 in the left-right direction, and it is used for insertion into the recess 52a of the flange portion 52. A columnar second protrusion 72 is integrally provided on the left side surface of the second base 70 (specifically, the left side surface of the rear end portion of the second base 70). Before the wire W is wound, the second protrusion 72 is as follows... Figure 4 As shown, it protrudes to the left from the left side of the second base 70. In the actual use state of the coil unit 40 after the wire W has been wound, the second protrusion 72 is bent to the right as shown. Figure 6 As shown, it protrudes downward from the left side of the second base 70.

[0073] It should be noted that in the actual use of the coil unit 40, the second protrusion 72 is not limited to protruding downwards; it can also protrude upwards, as long as it allows for winding of the wire W. For example, Figure 10 The diagram shows a schematic structure of a modified example in which the second protrusion 72 protrudes upward.

[0074] like Figure 2 As shown, the left side wall of the lower yoke 42 is located on the left side of the second terminal 7 of the coil unit 40. It should be noted that this invention is not limited to... Figure 2 As shown, the structure has the wall portion of the lower magnetic yoke 42 on both the left and right sides of the coil unit 40, as long as the wall portion of the lower magnetic yoke 42 exists at least on the right side of the coil unit 40.

[0075] like Figure 4 As shown, the second protrusion 72 includes: a fourth protrusion 72a, which is connected to the left side of the second base 70; a fifth protrusion 72b, which is connected to the fourth protrusion 72a and has a front-to-back width greater than the front-to-back width of the fourth protrusion 72a; and a sixth protrusion 72c, which is connected to the fifth protrusion 72b and has a front-to-back width less than the front-to-back width of the fifth protrusion 72b.

[0076] (2-4. Wire)

[0077] like Figure 5 and Figure 6As shown, the conductor W has a first end W1, a second end W2, and a winding portion W3. The first end W1 is electrically connected to the first terminal 6, and the second end W2 is electrically connected to the second terminal 7. The winding portion W3 is wound around the shaft A of the coil frame 5 and is electrically connected to the first end W1 and the second end W2. That is, the second terminal W2 is electrically connected to the first end W1 via the winding portion W3. It should be noted that in Figures 6-9 In order to make the winding state of the first end W1 and the second end W2 clearer, the winding state of the first end W1 and the second end W2 is shown by dashed lines.

[0078] exist Figure 5 In the diagram, the first end W1 of the conductor W is shown wrapped around the first protrusion 62 in solid lines. Specifically, the first end W1 of the conductor W includes: a first portion W11, which is wrapped around the third protrusion 62c of the first protrusion 62; a second portion W12, which is connected to the first portion W11 and bends along the first protrusion 62a of the first protrusion 62; and a third portion W13, which is connected to the second portion W12 and extends toward the left side of the shaft A of the coil frame 5.

[0079] like Figures 5-8 As shown, when viewed from the third portion W13 of the first end W1 of the conductor W towards the first portion W11 along the conductor W, the conductor W passes the right side of the first protrusion 62a of the first protrusion 62, then passes the left side of the first protrusion 62, and reaches the third protrusion 62c. Preferably, when viewed from the third portion W13 of the first end W1 of the conductor W towards the first portion W11 along the conductor W, the conductor W passes the right side of the first protrusion 62a of the first protrusion 62, then passes the left side of the second protrusion 62b of the first protrusion 62, and reaches the third protrusion 62c.

[0080] like Figures 6-8 As shown, the flange 52 of the coil frame 5 is connected to the shaft A and is located above the third portion W13 of the first end W1 of the conductor W. The first protrusion 62 protrudes downward beyond the first base 60. The left side of the second protrusion 62b of the first protrusion 62 faces the right side of the flange 52. The lower end face of the second protrusion 62b of the first protrusion 62 is located at approximately the same height as the lower surface of the flange 52. Alternatively, the lower end face of the second protrusion 62b of the first protrusion 62 may be located below the lower surface of the flange 52. Figure 10 The same structure can also be used in the variant shown, simply by reversing the top and bottom.

[0081] Specifically, in Figure 10 In the variant example shown, for the case of... Figures 2-9When elements with the same reference numerals are used to describe the same elements, the flange 52 of the coil frame 5 is connected to the shaft A, but the flange 52 is located below the third portion W13 of the first end W1 of the conductor W. Furthermore, the first protrusion 62 protrudes upwards from the first base 60. The left side of the second protrusion 62b of the first protrusion 62 faces the right side of the flange 52. The upper end face of the second protrusion 62b of the first protrusion 62 is located at approximately the same height as the upper surface of the flange 52. Alternatively, the upper end face of the second protrusion 62b of the first protrusion 62 may be located above the upper surface of the flange 52.

[0082] like Figure 6 and Figure 9 As shown, the second end W2 of the conductor W includes: a fourth portion W21, which is wound around the sixth protrusion 72c of the second protrusion 72; a fifth portion W22, which is connected to the fourth portion W21 and bends along the fourth protrusion 72a of the second protrusion 72; and a sixth portion W23, which is connected to the fifth portion W22 and extends toward the right side of the shaft A of the coil frame 5.

[0083] like Figure 6 and Figure 9 As shown, when viewed along the wire W from the sixth portion W23 of the second end W2 towards the fourth portion W21, the wire W passes the left side of the fourth protrusion 72a of the second protrusion 72, then passes the right side of the second protrusion 72, and reaches the sixth protrusion 72c. Preferably, when viewed along the wire W from the sixth portion W23 of the second end W2 towards the fourth portion W21, the wire W passes the left side of the fourth protrusion 72a of the second protrusion 72, then passes the right side of the fifth protrusion 72b of the second protrusion 72, and reaches the sixth protrusion 72c.

[0084] like Figure 6 As shown, the winding portion W3 includes a first connecting portion W31 and a second connecting portion W32. The first connecting portion W31 is connected to the third portion W13 of the first end W1 and bends along the axis A of the coil frame 5. The second connecting portion W32 is connected to the second end W2 and bends along the axis A of the coil frame 5. Specifically, the second connecting portion W32 is connected to the sixth portion W23 of the second end W2, thereby connecting to the second terminal 7. The first connecting portion W31 is located on the inner side (radially inner side) of the winding portion W3 than the second connecting portion W32. Alternatively, the distance between the first connecting portion W31 and the axis A of the coil frame 5 may be smaller than the distance between the second connecting portion W32 and the axis A of the coil frame 5. Preferably, the first connecting portion W31 is located on the innermost side of the winding portion W3. Furthermore, it is preferable that the second connecting portion W32 is located on the outermost side of the winding portion W3.

[0085] As an example of the winding method for the conductor W, the following winding method can be adopted. For example, the end of the first portion W11 of the first end W1 of the conductor W is welded to the third protrusion 62c of the first protrusion 62 of the first terminal 6. After winding around the first protrusion 62, the third portion W13 of the first end W1 of the conductor W is led out from the first protrusion 62 and extended toward the left side of the shaft A of the coil frame 5. Then, the conductor is wound clockwise on the shaft A. After the winding portion W3 is formed, as follows... Figure 6 As shown, the second connecting part W32 is led out toward the second terminal 7 (i.e., the left side), and the wire W is wrapped around the fourth protrusion 72a and the fifth protrusion 72b of the second protrusion 72 in sequence. Finally, the fourth part W21 of the second end W2 of the wire W is wrapped around the sixth protrusion 72c and the end of the fourth part W21 is welded to the sixth protrusion 72c.

Claims

1. A coil unit, characterized in that, The coil unit includes: The coil frame has a shaft portion; The first terminal is located on the coil frame; A conductor having a first end electrically connected to the first terminal, a winding portion electrically connected to the first end and wound around the shaft portion of the coil frame, and a second end electrically connected to the winding portion; and The second terminal is electrically connected to the second end and is electrically connected to the first terminal via the wire. The first terminal includes: a first base; and a first protrusion that protrudes upward or downward from the right side of the first base. The first protrusion includes: a first protruding portion connected to the right side of the first base; a second protruding portion connected to the first protruding portion, the width of the second protruding portion in the front-rear direction being greater than the width of the first protruding portion in the front-rear direction; and a third protruding portion connected to the second protruding portion, the width of the third protruding portion in the front-rear direction being less than the width of the second protruding portion in the front-rear direction. The first end of the conductor includes: a first portion that is wound around a third protruding portion of the first protrusion; a second portion that is connected to the first portion and bends along the first protruding portion; and a third portion that is connected to the second portion and extends toward the left side of the shaft portion of the coil frame.

2. The coil unit according to claim 1, characterized in that, The winding portion of the conductor includes: A first connecting portion, which is connected to the third portion of the first end, bends along the axis of the coil frame; and The second connecting portion, which is connected to the second end portion, is bent along the axis of the coil frame. The first connecting portion is located inside the winding portion, compared to the second connecting portion.

3. The coil unit according to claim 2, characterized in that, The first connecting part is located on the innermost side of the winding part.

4. The coil unit according to claim 1, characterized in that, The winding portion of the conductor includes: A first connecting portion, which is connected to the third portion of the first end, bends along the outer periphery of the coil frame; and The second connecting part, which is connected to the second end, is bent along the outer periphery of the coil frame. The distance between the first connecting part and the shaft of the coil frame is less than the distance between the second connecting part and the shaft of the coil frame.

5. The coil unit according to claim 1, characterized in that, When looking along the wire from the third portion of the first end toward the first portion, After passing the right side of the first protrusion of the first protrusion, the wire passes the left side of the first protrusion and reaches the third protrusion.

6. The coil unit according to claim 5, characterized in that, When looking along the wire from the third portion of the first end toward the first portion, After passing the right side of the first protrusion of the first protrusion, the wire passes the left side of the second protrusion of the first protrusion and reaches the third protrusion.

7. The coil unit according to claim 1, characterized in that, The coil frame also has a flange portion connected to the shaft portion, located below the third portion of the first end of the conductor. The first protrusion of the first terminal protrudes upwards compared to the first base. The left side of the second protruding part of the first protrusion is opposite to the right side of the flange. The upper end face of the second protruding part of the first protrusion is located at the same height as the upper surface of the flange or at a position above the upper surface of the flange.

8. The coil unit according to claim 1, characterized in that, The second terminal includes: a second base; and a second protrusion that protrudes upward or downward from the left side of the second base. The second protrusion includes: The fourth protruding part is connected to the left side of the second base; A fifth protruding portion, which is connected to the fourth protruding portion, wherein the width of the fifth protruding portion in the front-to-back direction is greater than the width of the fourth protruding portion in the front-to-back direction; and A sixth protruding portion, which is connected to the fifth protruding portion, wherein the width of the sixth protruding portion in the front-to-back direction is smaller than the width of the fifth protruding portion in the front-to-back direction. The second end of the conductor includes: The fourth part is wrapped around the sixth protruding part of the second protrusion; The fifth portion, which is connected to the fourth portion, bends along the fourth protruding portion; and The sixth part, which is connected to the fifth part, extends toward the right side of the shaft portion of the coil frame.

9. The coil unit according to claim 8, characterized in that, The winding portion of the conductor includes: A first connecting portion, which is connected to the third portion of the first end, bends along the axis of the coil frame; and The second connecting portion, which is connected to the sixth portion at the second end, bends along the axis of the coil frame. The first connecting portion is located inside the winding portion, compared to the second connecting portion. The second connecting portion is located on the outermost side of the winding portion.

10. The coil unit according to claim 8, characterized in that, When looking along the wire from the sixth portion at the second end of the wire toward the fourth portion, After passing the left side of the fourth protrusion of the second protrusion, the wire passes the right side of the second protrusion and reaches the sixth protrusion.

11. The coil unit according to claim 10, characterized in that, When looking along the wire from the sixth portion at the second end of the wire toward the fourth portion, After passing the left side of the fourth protrusion of the second protrusion, the wire passes the right side of the fifth protrusion of the second protrusion and reaches the sixth protrusion.

12. A coil unit, characterized in that, The coil unit includes: The coil frame has a shaft portion; The first terminal is located on the coil frame; A conductor having a first end electrically connected to the first terminal, a winding portion electrically connected to the first end and wound around the shaft portion of the coil frame, and a second end electrically connected to the winding portion; and The second terminal is electrically connected to the second end and is electrically connected to the first terminal via the wire. The first terminal includes: a first base; and a first protrusion that protrudes upward or downward from the right side of the first base. The first end of the conductor extends from the portion wound around the first protrusion toward the left side of the shaft portion of the coil frame.

13. The coil unit according to claim 12, characterized in that, The second terminal includes: a second base; and a second protrusion that protrudes upward or downward from the left side of the second base. The second end of the conductor extends from the portion wound around the second protrusion toward the right side of the shaft portion of the coil frame.

14. An electromagnetic relay, characterized in that, The electromagnetic relay includes: Fixed terminals; A movable contact, capable of moving between a first position in contact with the fixed terminal and a second position not in contact with the fixed terminal; and A magnetic circuit unit for moving the movable contact from the second position toward the first position. The magnetic circuit unit has: The coil unit according to any one of claims 1 to 13 is used to generate a magnetic field for moving the movable contact from the second position toward the first position; and The magnetic yoke includes a wall portion disposed on the right side of the coil unit.

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