Binding terminal assembly structure and electrical equipment

Abstract

To suppress damage to the spool side and deformation of a binding terminal in a binding terminal assembly structure.SOLUTION: A binding terminal 22 is formed in a plate shape extending in the insertion direction, and is inserted into a terminal mounting portion 25. The terminal mounting portion 25 is formed with a base surface 31, a pressing surface 32, and an end surface 33. The base surface 31 extends in the insertion direction, and a protrusion 34 is formed on the front side in the insertion direction. The pressing surface 32 faces the base surface 31 at the back in the insertion direction, and presses the binding terminal 22 inserted between the base surface 31 and the pressing surface. The end surface 33 is abutted by the tip of the inserted binding terminal 22. The binding terminal 22 is formed with an engagement hole 41 that fits with the protrusion 34 when the tip abuts against the end surface 33.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present invention relates to a terminal assembly structure and an electric device. [Background technology]

[0002] Patent Document 1 discloses a structure for attaching a binding terminal, which is a U-shaped leaf spring, to a spool. The terminal attachment part into which the binding terminal is inserted is provided with a claw to prevent the binding terminal from coming off, and the binding terminal is configured so that when it is inserted from the short side direction, it goes over the claw and is inserted. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2000-90800 A Summary of the Invention [Problem to be solved by the invention]

[0004] If the terminal is inserted from the short side, it is difficult for it to bend as a leaf spring, so there is a possibility that the tabs that prevent it from coming loose may chip or the terminal may become deformed. An object of the present invention is to suppress damage to the spool side and deformation of the binding terminal in a binding terminal assembly structure. [Means for solving the problem]

[0005] A binding terminal assembly structure according to one aspect of the present invention includes a spool and a binding terminal. The spool has a coil wound around a winding shaft, and a terminal mounting portion is formed on one end side of the winding shaft. The binding terminal is formed in a plate shape extending in the insertion direction, is inserted into the terminal mounting portion, and the coil is connected. The terminal mounting portion is formed with a base surface, a pressing surface, and an end surface. The base surface extends in the insertion direction, and a first engagement portion is formed on the front side of the insertion direction. The pressing surface faces the base surface at the back in the insertion direction, and holds the binding terminal inserted between the base surface and the pressing surface. The tip of the inserted binding terminal abuts against the end surface. The binding terminal is formed with a second engagement portion that fits into the first engagement portion when the tip abuts against the end surface. Effect of the Invention

[0006] According to the present invention, since the binding terminal is inserted from the longitudinal direction, it is easy to bend it as a leaf spring, and therefore damage to the spool side and deformation of the binding terminal can be suppressed. [Brief description of the drawings]

[0007] [Figure 1] FIG. [Diagram 2] FIG. 4 is a diagram showing a terminal assembly structure. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] FIG. 13 is a diagram showing the state when the tie-down terminal is inserted. [Figure 8] FIG. 13 shows the completed insertion of the binding terminal. [Figure 9] FIG. 13 shows the completed insertion of the binding terminal. [Figure 10] FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that each drawing is a schematic view and may differ from the actual one. In addition, the following embodiment illustrates an apparatus and method for embodying the technical idea of ​​the present invention, and does not specify the configuration as described below. In other words, the technical idea of ​​the present invention can be modified in various ways within the technical scope described in the claims.

[0009] <<Embodiment>> "composition" In the following description, the three mutually orthogonal directions will be referred to as a width direction, a length direction, and a depth direction for the sake of convenience. FIG. 1 is a diagram showing an electric device 11. As shown in FIG. FIG. 1A shows the electric device 11 as viewed from one side in the width direction, one side in the vertical direction, and from the front in the depth direction. FIG. 1B shows the inside of the electric device 11 as viewed from the other side in the vertical direction. The electric device 11 is, for example, a mechanical latch device that is attached to an electromagnetic contactor and mechanically holds the electromagnetic contactor in the on state. That is, the electric device 11 is attached to the electromagnetic contactor in a circuit in which it is desired not to cut off the electromagnetic contactor due to a power outage or voltage drop, or when it is desired to reduce the power consumption for exciting a control coil. The electric device 11 includes a latch support 12, a rotating lever 13, and an electromagnet portion 14.

[0010] The latch support 12 can move back and forth in the depth direction, and the tip portion protruding in the depth direction is fitted into the contact support of the electromagnetic contactor. The rotating lever 13 is supported rotatably on one side of the latch support 12 in the width direction, and by hooking a roller on the latch support 12 in the closed position, the latch support 12 is prevented from moving to the released position. At this time, the electromagnetic contactor is in a latched state in which the closed state is maintained. The electromagnet portion 14 is disposed on the other side of the latch support 12 in the width direction, and when excited, it pushes back the rotating lever 13, thereby retracting the roller hooked on the latch support 12. At this time, the latched state of the electromagnetic contactor is released.

[0011] FIG. 2 is a diagram showing the terminal assembly structure 15. As shown in FIG. (a) in the figure shows the state of the binding terminal assembly structure 15 as seen from the other side in the vertical direction, the other side in the width direction, and the front side in the depth direction. (b) in the figure shows the state of the binding terminal assembly structure 15 as seen from the front side in the depth direction. The binding terminal assembly structure 15 constitutes a part of the electromagnet section 14 and includes a spool 21 and a binding terminal 22. The spool 21 is made of insulating resin, and a coil 24 is wound around a cylindrical winding shaft 23 extending along the width direction, and a terminal attachment section 25 is formed on one end side of the winding shaft 23. The terminal attachment section 25 is formed on the other side in the width direction, the other side in the vertical direction, and the front side in the depth direction of the spool 21. The binding terminal 22 is made of a conductive metal, and is inserted into the terminal attachment section 25, and one end of the coil 24 is bound and electrically connected.

[0012] FIG. 3 is a diagram showing the spool 21. As shown in FIG. In the figure, (a) shows the spool 21 as viewed from the other side in the vertical direction, the other side in the width direction, and from the front side in the depth direction. In the figure, (b) shows the spool 21 as viewed from the front side in the depth direction. FIG. 4 is a diagram showing the terminal attachment portion 25. As shown in FIG. In the figure, (a) shows the terminal mounting portion 25 as viewed from the other side in the vertical direction, the other side in the width direction, and the front side in the depth direction. In the figure, (b) shows the terminal mounting portion 25 as viewed from the front side in the depth direction. Here, the other side in the vertical direction is the front side in the insertion direction, and one side in the vertical direction is the back side in the insertion direction.

[0013] The terminal attachment portion 25 is formed with a base surface 31 , a pressing surface 32 , and an end surface 33 . The base surface 31 is a plane extending in the insertion direction, aligned along the insertion direction and the depth direction, and facing the other side in the width direction, and a protrusion 34, which is a first engagement portion, is formed in the center in the depth direction just before the insertion direction. The protrusion 34 is convex toward the other side in the width direction, and the height in the width direction is uniform overall and slightly larger than the thickness of the binding terminal 22. The pressing surface 32 is a flat surface that faces one side in the width direction along the insertion direction and the depth direction, faces the base surface 31 at the back in the insertion direction, and presses the binding terminal 22 inserted between the base surface 31 and the pressing surface 32. The gap in the width direction between the base surface 31 and the pressing surface 32 is uniform overall and slightly larger than the thickness of the binding terminal 22. In the terminal mounting portion 25, the front part in the depth direction between the base surface 31 and the pressing surface 32 is open. The end surface 33 is a flat surface that extends along the depth direction and width direction and faces the front in the insertion direction, against which the tip of the inserted binding terminal 22 abuts.

[0014] FIG. 5 is a diagram showing the terminal attachment portion 25. As shown in FIG. Here, a cross section of the terminal mounting portion 25 taken along the insertion direction and the depth direction through the protrusion 34 is shown as viewed from the other side in the width direction. The back side of the protrusion 34 in the insertion direction is formed in a straight line along the depth direction, and the front side in the insertion direction is formed in a substantially semicircular shape as viewed from the width direction by rounding the corners of the sides along the insertion direction and the sides along the depth direction on both sides in the depth direction. A recess 35 is formed in the center of the end face 33 in the depth direction. The recess 35 is recessed toward the back in the insertion direction and is substantially rectangular as viewed from the width direction.

[0015] FIG. 6 is a diagram showing the connecting terminal 22. As shown in FIG. (a) in the figure shows the state of the knot terminal 22 as seen from the back in the insertion direction, the other side in the width direction, and the front in the depth direction. (b) in the figure shows the state of the knot terminal 22 as seen from the front in the depth direction. The knot terminal 22 is a leaf spring that extends in the insertion direction and is aligned with the insertion direction and the depth direction, with the front side in the insertion direction curved and the side folded back toward the back in the insertion direction elastically contacting a coil terminal (not shown). The knot terminal 22 has an engagement hole 41, which is a second engagement portion, formed on the front side in the insertion direction. The engagement hole 41 penetrates the knot terminal 22 in the thickness direction and is shaped to fit into the protrusion 34, with the back edge in the insertion direction formed linearly along the depth direction and the front edge in the insertion direction at the curved position of the knot terminal 22 and formed in an approximately semicircular shape.

[0016] The hook terminal 22 has a circular protrusion 42 that is protruding in the thickness direction by doweling in the region inserted between the base surface 31 and the pressing surface 32. The protrusions 42 are formed in the center of the depth direction, one on the back side in the insertion direction, and one on the front side in the insertion direction on both sides of the depth direction. The positions of the protrusions 42 are shifted in the insertion direction to ensure a separation distance between them. The thickness of the hook terminal 22, including the protrusions 42, is slightly larger than the gap in the width direction between the base surface 31 and the pressing surface 32. A hook portion 43 that protrudes toward the front in the depth direction is formed at the back of the hook terminal 22 in the insertion direction. The coil 24 is hooked to the hook portion 43 and joined by brazing. A protrusion 44 that protrudes toward the back of the hook terminal 22 in the insertion direction is formed at the tip of the hook terminal 22 in the insertion direction. The protrusion 44 fits into the recess 35 of the end face 33.

[0017] Next, the attachment of the binding terminal 22 will be described. FIG. 7 is a diagram showing a state in which the binding terminal 22 is inserted. Here, the terminal attachment portion 25 is shown as viewed from the back in the insertion direction, the other side in the width direction, and from the front in the depth direction. First, the tip side of the binding terminal 22 is tilted downward in the insertion direction, and the protruding portion 44 is directed between the base surface 31 and the pressing surface 32. Then, the curved portion of the binding terminal 22 that is folded back before the insertion direction and the binding portion 43 that protrudes before the depth direction are pushed toward the back in the insertion direction. At this time, because the base surface 31 has the protrusion 34, the binding terminal 22 enters between the base surface 31 and the pressing surface 32 while bending.

[0018] FIG. 8 is a diagram showing a state in which the insertion of the binding terminal 22 is completed. Here, the terminal attachment portion 25 is shown as viewed from the back in the insertion direction, the other side in the width direction, and the front side in the depth direction. When the engagement hole 41 of the hook terminal 22 reaches the protrusion 34, the hook terminal 22 returns to its original state from the bent state, and the protrusion 34 fits into the engagement hole 41. FIG. 9 is a diagram showing a state in which the insertion of the binding terminal 22 is completed. FIG. 1(a) shows a cross section of the terminal mounting portion 25 taken along the insertion direction and the depth direction through the projection 34, as viewed from the other side in the width direction. FIG. 1(b) shows a cross section of the terminal mounting portion 25 taken along the insertion direction and the width direction through the projection 34, as viewed from the front in the depth direction. The binding terminal 22 stops at a position where the tip, i.e., the base end of the protrusion 44, comes into contact with the end face 33, and the protrusion 44 fits into the recess 35. Since the binding terminal 22 has a protrusion 42 formed thereon, it is pressed in when inserted between the base face 31 and the pressing face 32.

[0019] <Action and Effect> Next, main effects of the embodiment will be described. The binding terminal assembly structure 15 includes a spool 21 and a binding terminal 22. The spool 21 has a coil 24 wound around a winding shaft 23, and a terminal mounting portion 25 is formed on one end of the winding shaft 23. The binding terminal 22 is formed in a plate shape extending in the insertion direction, and is inserted into the terminal mounting portion 25 to connect the coil 24. The terminal mounting portion 25 is formed with a base surface 31, a pressing surface 32, and an end surface 33. The base surface 31 extends in the insertion direction, and a protrusion 34 is formed on the front side of the insertion direction. The pressing surface 32 faces the base surface 31 at the back in the insertion direction, and presses the binding terminal 22 inserted between the base surface 31. The end surface 33 is abutted by the tip of the inserted binding terminal 22. The binding terminal 22 has an engagement hole 41 formed in which the protrusion 34 fits when the tip abuts against the end surface 33. In this way, the binding terminal 22 is inserted from the longitudinal direction, so it is easy to bend it as a leaf spring. This makes it possible to suppress damage to the spool 21 and deformation of the binding terminal 22. In addition, the engagement hole 41 fits into the protrusion 34, making it possible to prevent the binding terminal 22 from shifting position or falling off.

[0020] The binding terminal 22 has a protrusion 42 that protrudes in the thickness direction in a region that is inserted between the base surface 31 and the pressing surface 32. This makes it possible to suppress rattling of the binding terminal 22. The binding terminal 22 is formed with a binding portion 43 that protrudes in one direction perpendicular to the insertion direction and around which the coil 24 is bound. The terminal attachment portion 25 is open on one side perpendicular to the insertion direction. This allows the binding terminal 22 to be inserted smoothly without the binding portion 43 interfering with the terminal attachment portion 25.

[0021] The hook-up terminal 22 is curved at the front in the insertion direction. The inner edge of the engagement hole 41 in the insertion direction is formed in a straight line perpendicular to the insertion direction, and the front edge in the insertion direction is curved and formed in a semicircle. This makes it possible to suppress stress concentration at the front edge of the engagement hole 41 in the insertion direction when the curved portion of the hook-up terminal 22 elastically deforms. A protrusion 44 that protrudes toward the back in the insertion direction is formed at the tip of the binding terminal 22. A recess 35 into which the protrusion 44 fits is formed on the end face 33. This makes it possible to suppress misalignment of the binding terminal 22 in the direction perpendicular to the insertion direction. The electric device 11 employs the binding terminal assembly structure 15. This makes it possible to suppress damage to the spool 21 side and deformation of the binding terminal 22 in the electromagnet portion 14 included in the electric device 11.

[0022] Next, a comparative example will be described. The comparative example has a similar configuration to the above-described embodiment except for the insertion structure of the tie-down terminal, and therefore a detailed description of the common parts will be omitted. FIG. 10 is a diagram showing a comparative example. Here, the terminal mounting part 51 is shown as viewed from the back in the insertion direction, the other side in the width direction, and the front in the depth direction. The terminal mounting part 51 is structured so that the binding terminal 52 is inserted from the short side direction. The terminal mounting part 51 is provided with a claw 53 for preventing the binding terminal 52 from coming off, and is configured so that when the binding terminal 52 is inserted from the short side direction, it is inserted by climbing over the claw 53. However, when the binding terminal 52 is inserted from the short side direction, since it is difficult to bend as a leaf spring, there is a possibility that the claw 53 for preventing it from coming off may be chipped or the binding terminal 52 may be deformed.

[0023] <<Variation>> In the embodiment, the configuration in which the protrusion 42 of the binding terminal 22 is formed by doweling has been described, but the present invention is not limited to this. In other words, the protrusion may be formed by cutting and bending as long as it is protruding in the thickness direction. In the embodiment, the first engagement portion is a protrusion and the second engagement portion is an engagement hole, but they may be any engagement portions that engage with each other. The first engagement portion may be an engagement hole and the second engagement portion may be a protrusion. In the embodiment, the electrical device 11 is a mechanical latch device, but the present invention is not limited to this. That is, an electromagnetic contactor may be used as long as it has a structure including an electromagnet portion 14 into which the binding terminal 22 is inserted.

[0024] Although the above description has been given with reference to a limited number of embodiments, the scope of the invention is not limited thereto, and modifications of the embodiments based on the above disclosure will be obvious to those skilled in the art. [Explanation of symbols]

[0025] 11...electrical device, 12...latch support, 13...rotating lever, 14...electromagnet portion, 15...binding terminal assembly structure, 21...spool, 22...binding terminal, 23...winding shaft, 24...coil, 25...terminal mounting portion, 31...base surface, 32...pressing surface, 33...end surface, 34...projection, 35...recess, 41...engagement hole, 42...projection, 43...binding portion, 44...projection, 51...terminal mounting portion, 52...binding terminal, 53...claw

Claims

1. a spool having a coil wound around a winding shaft and a terminal attachment portion formed on one end side of the winding shaft; a binding terminal formed in a plate shape extending in an insertion direction, inserted into the terminal attachment portion, and connected to the coil; The terminal mounting portion has A base surface extending in an insertion direction and having a first engagement portion formed on a proximal side in the insertion direction; a pressing surface facing the base surface at the back in the insertion direction and pressing the binding terminal inserted between the base surface and the pressing surface; and an end surface against which the tip of the inserted binding terminal abuts; The said binding terminal is formed with a second engagement portion that fits into the first engagement portion when the tip of the binding terminal abuts against the end face.

2. 2. The terminal assembly structure according to claim 1, wherein the terminal has a protrusion that protrudes in a thickness direction in a region that is inserted between the base surface and the pressing surface.

3. The binding terminal is formed with a binding portion that protrudes in one direction perpendicular to the insertion direction and around which the coil is bound, 2. The terminal assembly structure according to claim 1, wherein the terminal mounting portion is open on one side in a direction perpendicular to the insertion direction.

4. The said terminal is curved at the front side in the insertion direction and folded back toward the back side in the insertion direction, The terminal assembly structure described in claim 1, characterized in that the second engagement portion is an engagement hole, and the inner edge of the engagement hole in the insertion direction is formed in a straight line perpendicular to the insertion direction, and the inner edge of the engagement hole in the insertion direction is in a curved position and formed in a semicircular shape.

5. The tip of the binding terminal is formed with a protruding portion protruding toward the back in the insertion direction, 2. The terminal assembly according to claim 1, wherein the end surface is formed with a recess into which the protrusion fits.

6. 2. An electrical device comprising the terminal assembly structure according to claim 1.

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