Wiring terminal assembly structure and electric equipment

Abstract

The invention relates to a wiring terminal assembly structure and electric equipment. According to the wiring terminal assembly structure, damage to one side of the winding frame and deformation of the wiring terminal can be restrained. The terminal (22) is formed in a plate shape extending in the insertion direction, and is inserted into the terminal mounting portion (25). A base surface (31), a pressing surface (32), and an end surface (33) are formed on the terminal mounting part (25). The base surface (31) extends in the insertion direction, and a protrusion (34) is formed in front of the insertion direction. The pressing surface (32) faces the base surface (31) on the inner side in the insertion direction, and presses the wiring terminal (22) inserted between the pressing surface and the base surface (31). The end surface (33) abuts against the front end of the inserted connection terminal (22). An engagement hole (41) is formed in the terminal (22), and the protrusion (34) is fitted into the engagement hole when the tip of the terminal (22) is in contact with the end surface (33).

Description

Technical Field

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

[0002] Patent Document 1 discloses a structure in which a U-shaped leaf spring is mounted on a bobbin. A claw for preventing the terminal from falling off is provided at a terminal mounting portion for inserting the terminal, and the terminal is inserted over the claw when inserted from the short side direction.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2000-90800 Summary of the invention

[0006] Problems to be solved by the invention

[0007] If the connection terminal is inserted from the short side direction, since the leaf spring is difficult to bend, there is a possibility that the claw for preventing the connection terminal from coming out is damaged or the connection terminal is deformed.

[0008] An object of the present invention is to suppress damage on one side of a winding frame and deformation of a connecting terminal in a connecting terminal assembly structure.

[0009] Technical solutions to solve problems

[0010] A terminal assembly structure of one embodiment of the present invention includes a winding frame and a terminal. The winding frame has a coil wound on a winding shaft, and a terminal mounting portion is formed on one end side of the winding shaft. The terminal is formed in a plate shape extending in the insertion direction, inserted into the terminal mounting portion, and connected to the coil. A base surface, a pressing surface, and an end surface are formed on the terminal mounting portion. The base surface extends in the insertion direction, and a first clamping portion is formed on the front side of the insertion direction. The pressing surface is opposite to the base surface on the inner side of the insertion direction, and the terminal is pressed and inserted between the pressing surface and the base surface. The end surface abuts against the front end of the inserted terminal. A second clamping portion is formed on the terminal, and the second clamping portion is engaged with the first clamping portion when the front end of the terminal abuts against the end surface.

[0011] Effects of the Invention

[0012] According to the present invention, since the connecting terminal is inserted from the longitudinal direction, it is easy to bend as a leaf spring. Therefore, it is possible to suppress damage to the winding frame side and deformation of the connecting terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a diagram showing an electrical device.

[0014] Figure 2This is a diagram showing the assembly structure of the terminal block.

[0015] Figure 3 It is a figure which shows a winding frame.

[0016] Figure 4 It is a figure which shows the terminal mounting part.

[0017] Figure 5 It is a figure which shows the terminal mounting part.

[0018] Figure 6 This is a diagram showing the wiring terminals.

[0019] Figure 7 This is a diagram showing the situation when the terminal block is inserted.

[0020] Figure 8 It is a figure which shows the state which completed the insertion of a connection terminal.

[0021] Fig. 9 It is a figure which shows the state which completed the insertion of a connection terminal.

[0022] Fig.10 It is a figure which shows a comparative example. DETAILED DESCRIPTION

[0023] The following is an explanation of the embodiments of the present invention based on the accompanying drawings. In addition, each of the accompanying drawings is schematic and may differ from reality. In addition, the following embodiments illustrate devices and methods for implementing the technical ideas of the present invention, and do not specify the structure as described below. That is, the technical ideas of the present invention can be subjected to various changes within the technical scope recorded in the claimed scope of rights.

[0024] Implementation Methods

[0025] "structure"

[0026] In the following description, for convenience, three directions orthogonal to each other are defined as a width direction, a longitudinal direction, and a depth direction.

[0027] Figure 1 It is a diagram showing the electric device 11 .

[0028] (a) in the figure shows the state of the electric device 11 observed from one side in the width direction, one side in the longitudinal direction, and the front in the depth direction. (b) in the figure shows the state of the inside of the electric device 11 observed from the other side in the longitudinal direction. The electric device 11 is, for example, a mechanical latch device, which is installed on an electromagnetic contactor to mechanically maintain the closed state of the electromagnetic contactor. That is, it is installed on the electromagnetic contactor in the case where it is desired to suppress the power consumption of the circuit that does not want the electromagnetic contactor to be cut off due to power outages or voltage drops, or for exciting the control coil. The electric device 11 includes a latch support 12, a rotating rod 13, and an electromagnet part 14.

[0029] The latch support 12 can move forward and backward in the depth direction, and the front end protruding deep in the depth direction is engaged with the contact support of the electromagnetic contactor. The rotating rod 13 is supported to be rotatable on the side closer to the width direction than the latch support 12, and the roller is hooked on the latch support 12 in the connected position, thereby preventing the latch support 12 from shifting to the released position. At this time, it becomes a latched state that maintains the closed state of the electromagnetic contactor. The electromagnet part 14 is arranged at a position closer to the other side in the width direction than the latch support 12, and the roller hooked on the latch support 12 is retracted by pushing back the rotating rod 13 when excited. At this time, the latched state of the electromagnetic contactor is released.

[0030] Figure 2 It is a diagram showing the terminal assembly structure 15 .

[0031] (a) in the figure shows the state of the terminal assembly structure 15 observed from the other side in the longitudinal direction, the other side in the width direction, and the front in the depth direction. (b) in the figure shows the state of the terminal assembly structure 15 observed from the front in the depth direction. The terminal assembly structure 15 constitutes a part of the electromagnet part 14, and includes a winding frame 21 and a terminal 22. The winding frame 21 is made of insulating resin, and a coil 24 is wound on a cylindrical winding shaft 23 extending in the width direction, and a terminal mounting portion 25 is formed on one end side of the winding shaft 23. The terminal mounting portion 25 is formed on the other side in the width direction, the other side in the longitudinal direction, and the front in the depth direction of the winding frame 21. The terminal 22 is made of conductive metal, inserted into the terminal mounting portion 25, and one end of the coil 24 is wound and electrically connected.

[0032] Figure 3 It is a figure which shows the winding frame 21.

[0033] (a) of the figure shows the state where the reel 21 is viewed from the other side in the longitudinal direction, the other side in the width direction, and the front in the depth direction. (b) of the figure shows the state where the reel 21 is viewed from the front in the depth direction.

[0034] Figure 4 It is a diagram showing the terminal mounting portion 25 .

[0035] (a) in the figure shows the state of the terminal mounting portion 25 observed from the other side in the longitudinal direction, the other side in the width direction, and the front in the depth direction. (b) in the figure shows the state of the terminal mounting portion 25 observed from the front in the depth direction. Here, the other side in the longitudinal direction is set as the front side in the insertion direction, and the one side in the longitudinal direction is set as the back side in the insertion direction.

[0036] 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 is a plane extending in the insertion direction, along the insertion direction and the depth direction and toward the other side of the width direction, and a protrusion 34 as a first engaging portion is formed in the center of the depth direction in front of the insertion direction. The protrusion 34 protrudes toward the other side of the width direction, and the height in the width direction is uniform as a whole, which is slightly larger than the thickness of the terminal 22.

[0037] The pressing surface 32 is a plane along the insertion direction and the depth direction and facing one side in the width direction, and is opposite to the base surface 31 on the inner side in the insertion direction, and presses the connection terminal 22 inserted between the pressing surface and the base surface 31. The gap in the width direction between the base surface 31 and the pressing surface 32 is uniform as a whole, and is slightly larger than the thickness of the connection terminal 22. In the terminal mounting portion 25, the front side in the depth direction between the base surface 31 and the pressing surface 32 is open.

[0038] The end surface 33 is a flat surface extending along the depth direction and the width direction and facing forward in the insertion direction, and abuts against the front end of the inserted connection terminal 22 .

[0039] Figure 5 It is a diagram showing the terminal mounting portion 25 .

[0040] Here, the state of the cross section along the insertion direction and the depth direction through the protrusion 34 in the terminal mounting portion 25 as viewed from the other side in the width direction is shown. In the protrusion 34, the inner side in the insertion direction is formed into a straight line along the depth direction, and the front side in the insertion direction is formed into a roughly semicircular shape as viewed from the width direction by rounding the corners of the side along the insertion direction and the side 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 inner side in the insertion direction and is roughly square as viewed from the width direction.

[0041] Figure 6 It is a diagram showing the connection terminal 22.

[0042] (a) in the figure shows the state of the terminal block 22 observed from the inner side in the insertion 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 terminal block 22 observed from the front side in the depth direction. The terminal block 22 is a leaf spring extending in the insertion direction and along the insertion direction and the depth direction. The front side in the insertion direction is bent, and the side folded back toward the inner side in the insertion direction elastically contacts with the coil terminal not shown. In the terminal block 22, an engaging hole 41 serving as a second engaging portion is formed on the front side in the insertion direction. The engaging hole 41 is a shape that penetrates the terminal block 22 in the thickness direction and is engaged with the protrusion 34. The edge on the inner side in the insertion direction is formed in a straight line along the depth direction, and the edge in the front side in the insertion direction is located at the bending position of the terminal block 22 and is formed in a roughly semicircular shape.

[0043] On the terminal 22, a circular protrusion 42 protruding in the thickness direction is formed by dowel forming in the area between the insertion base surface 31 and the pressing surface 32. The protrusion 42 is formed at the center of the depth direction and on the inner side of the insertion direction, and one is formed on both sides of the depth direction and on the front side of the insertion direction. The positions of the protrusions 42 are staggered in the insertion direction to ensure the separation distance between each other. The thickness of the terminal 22 including the protrusion 42 is slightly larger than the gap in the width direction between the base surface 31 and the pressing surface 32. A wiring portion 43 protruding toward the front side of the depth direction is formed on the inner side of the insertion direction of the terminal 22. The coil 24 is wound around the wiring portion 43 and joined by soldering. A protrusion 44 protruding toward the depth of the insertion direction is formed at the front end of the terminal 22 in the insertion direction. The protrusion 44 is fitted into the recess 35 of the end face 33.

[0044] Next, the installation of the connection terminal 22 will be described.

[0045] Figure 7 It is a diagram showing the state when the connection terminal 22 is inserted.

[0046] Here, the state of the terminal mounting portion 25 viewed from the inner side in the insertion direction, the other side in the width direction, and the front in the depth direction is shown. First, the front end side of the connection terminal 22 is tilted in a manner that descends relative to the insertion direction, and the protrusion 44 is directed toward between the base surface 31 and the pressing surface 32. Then, the bent portion of the connection terminal 22 that is folded back in front of the insertion direction and the connection portion 43 that protrudes toward the front in the depth direction are pressed toward the depth in the insertion direction. At this time, since there is a protrusion 34 on the base surface 31, the connection terminal 22 is bent while entering between the base surface 31 and the pressing surface 32.

[0047] Figure 8 This is a diagram showing a state where the insertion of the connection terminal 22 is completed.

[0048] Here, the terminal mounting portion 25 is shown viewed from the back in the insertion direction, the other side in the width direction, and the front in the depth direction. When the engagement hole 41 reaches the position of the protrusion 34, the connection terminal 22 recovers from the flexed state, and the protrusion 34 fits into the engagement hole 41.

[0049] Fig. 9 This is a diagram showing a state where the insertion of the connection terminal 22 is completed.

[0050] (a) in the figure shows the state of the cross section through the protrusion 34 and along the insertion direction and the depth direction in the terminal mounting portion 25 as viewed from the other side in the width direction. (b) in the figure shows the state of the cross section through the protrusion 34 and along the insertion direction and the width direction in the terminal mounting portion 25 as viewed from the front in the depth direction. The terminal 22 stops at a position where the front end, i.e., the base end of the protrusion 44, contacts the end surface 33, and the protrusion 44 is engaged with the recess 35. The protrusion 42 is formed on the terminal 22, so if it is inserted between the base surface 31 and the pressing surface 32, it becomes a pressed-in state.

[0051] 《Effects》

[0052] Next, main effects of the embodiment will be described.

[0053] The terminal assembly structure 15 includes a winding frame 21 and a terminal 22. The winding frame 21 is wound with a coil 24 on a winding shaft 23, and a terminal mounting portion 25 is formed on one end side of the winding shaft 23. The terminal 22 is formed in a plate shape extending in the insertion direction, inserted into the terminal mounting portion 25, and connected to 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 is opposite to the base surface 31 on the inner side of the insertion direction, and presses the terminal 22 inserted between the pressing surface and the base surface 31. The end surface 33 abuts against the front end of the inserted terminal 22. The terminal 22 is formed with a snap-fit ​​hole 41, and the snap-fit ​​hole and the protrusion 34 are engaged when the front end of the terminal abuts against the end surface 33. In this way, since the terminal 22 is inserted from the length direction, it is easy to bend as a leaf spring. Therefore, it is possible to suppress damage to the winding frame 21 side and deformation of the connection terminal 22. In addition, by fitting the engagement hole 41 and the protrusion 34, it is possible to prevent the connection terminal 22 from being displaced or falling off.

[0054] A convex portion 42 that bulges in the thickness direction is formed in a region of the connection terminal 22 that is inserted between the base surface 31 and the pressing surface 32. This can suppress the connection terminal 22 from rattling.

[0055] The connection terminal 22 is formed with a connection portion 43 that protrudes on one side in a direction perpendicular to the insertion direction and can be wound with the coil 24. The terminal mounting portion 25 is open on one side in a direction perpendicular to the insertion direction. Thus, when the connection terminal 22 is inserted, the connection portion 43 does not interfere with the terminal mounting portion 25, and can be smoothly inserted.

[0056] The connection terminal 22 is bent in front of the insertion direction. The edge of the inner side of the engaging hole 41 in the insertion direction is formed into a straight line orthogonal to the insertion direction, and the edge in front of the insertion direction is located at the bent position and formed into a semicircular shape. Therefore, when the bent portion of the connection terminal 22 is elastically deformed, it is possible to suppress stress concentration on the edge in front of the engaging hole 41 in the insertion direction.

[0057] A protrusion 44 that protrudes inward in the insertion direction is formed at the front end of the connection terminal 22. A recess 35 that fits with the protrusion 44 is formed on the end surface 33. This can prevent the connection terminal 22 from being displaced in a direction perpendicular to the insertion direction.

[0058] The electric device 11 adopts the terminal assembly structure 15 . Thus, in the electromagnet portion 14 included in the electric device 11 , damage on the bobbin 21 side and deformation of the terminal 22 can be suppressed.

[0059] Next, comparative examples will be described.

[0060] The comparative example has the same structure as the above-mentioned embodiment except that the insertion structure of the connection terminal is different, so the detailed description of the common parts is omitted.

[0061] Fig.10 It is a figure which shows a comparative example.

[0062] Here, the state of the terminal mounting portion 51 as viewed from the inner side in the insertion direction, the other side in the width direction, and the front in the depth direction is shown. The terminal mounting portion 51 is configured to insert the connection terminal 52 from the short side direction. The terminal mounting portion 51 is provided with a claw 53 for preventing the connection terminal 52 from falling off, and when the connection terminal 52 is inserted from the short side direction, it is configured to pass over the claw 53 and be inserted. However, if the connection terminal 52 is inserted from the short side direction, it is difficult for the leaf spring to bend, so there is a possibility that the claw 53 for preventing the connection terminal 52 from falling off is damaged and the connection terminal 52 is deformed.

[0063] 《Variation Example》

[0064] In the embodiment, the structure in which the convex portion 42 of the connection terminal 22 is formed by protrusion processing has been described, but the present invention is not limited to this. That is, as long as it protrudes in the thickness direction, the convex portion may be formed by cutting and bending processing.

[0065] In the embodiment, the first engaging portion is a protrusion and the second engaging portion is an engaging hole, but any engaging portion that engages with each other may be sufficient. Alternatively, the first engaging portion may be an engaging hole and the second engaging portion may be a protrusion.

[0066] In the embodiment, the electric device 11 is described as a mechanical latch device, but the present invention is not limited thereto. That is, as long as it has a structure including the electromagnet portion 14 into which the connection terminal 22 is inserted, it may be an electromagnetic contactor.

[0067] Although the above description has been made with reference to a limited number of embodiments, the scope of rights is not limited thereto, and modifications based on the above disclosed embodiments will be obvious to those skilled in the art.

[0068] Description of Reference Numerals

[0069] 11…electrical device, 12…latch support, 13…rotating rod, 14…electromagnet part, 15…terminal assembly structure, 21…winding frame, 22…terminal, 23…winding shaft, 24…coil, 25…terminal mounting part, 31…base surface, 32…pressing surface, 33…end surface, 34…protrusion, 35…recess, 41…engaging hole, 42…convex part, 43…connection part, 44…protrusion, 51…terminal mounting part, 52…terminal, 53…claw

Claims

1. A terminal assembly structure, characterized in that: include: A winding frame capable of winding a coil on a winding shaft, wherein a terminal mounting portion is formed on one end side of the winding shaft; and The connecting terminal is formed into a plate shape extending in the insertion direction, inserted into the terminal mounting portion, and connected to the coil. The terminal mounting portion is formed with: A base surface extending in the insertion direction and having a first engaging portion formed on the front side of the insertion direction; A pressing surface, which is opposite to the base surface in the inner side of the insertion direction and presses the connection terminal inserted between the pressing surface and the base surface; and an end surface abutting against the front end of the inserted terminal, The connection terminal has a second engaging portion formed thereon, and the second engaging portion is engaged with the first engaging portion when the front end of the connection terminal abuts against the end surface.

2. The terminal assembly structure according to claim 1, characterized in that: A convex portion protruding in the thickness direction is formed in a region of the connection terminal inserted between the base surface and the pressing surface.

3. The terminal assembly structure according to claim 1, characterized in that: The connection terminal has a connection portion formed thereon, the connection portion protruding on one side in a direction perpendicular to the insertion direction and capable of winding the coil. The terminal mounting portion is open on one side in a direction perpendicular to the insertion direction.

4. The terminal assembly structure according to claim 1, characterized in that: The front side of the connecting terminal in the insertion direction is bent and folded back toward the inner side in the insertion direction. The second engagement portion is an engagement hole, wherein the edge on the back side in the insertion direction of the engagement hole is formed in a straight line orthogonal to the insertion direction, and the edge on the front side in the insertion direction is located at a curved position and formed in a semicircular shape.

5. The terminal assembly structure according to claim 1, characterized in that: A protrusion that protrudes inward in the insertion direction is formed at the front end of the connection terminal, and a recess that fits with the protrusion is formed on the end surface.

6. An electrical device, characterized in that: The terminal assembly structure according to claim 1 is adopted.

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