Connection terminal

Abstract

To provide a connection terminal that can easily attach a coil assembly while absorbing vibrations, etc., of a coil assembly.SOLUTION: A connection terminal 10 for connecting a coil assembly 1 to a substrate 2 includes a coil side connection portion 11 connected to the coil assembly 1, a substrate side connection portion 12 connected to the substrate 2, a straight portion 13 extending linearly between the tip end of the coil side connection portion 11 and the base end of the substrate side connection portion 12, and a detour coupling portion 14 formed by detouring the straight portion 13 and coupling the coil side connection portion 11 and the substrate side connection portion 12. The detour coupling portion 14 is deformable, and a part of the straight portion 13 is cut off to include a gap portion 15 narrower than the deformation length of the detour coupling portion 14.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a connection terminal. [Background technology]

[0002] Conventionally, in electronic control devices incorporating a coil assembly, a technology using a press-fit type connection terminal is known as a structure for attaching the coil assembly to an ECU board (see, for example, Patent Document 1). The connection terminal in Patent Document 1 is provided in a brake hydraulic control device mounted on a vehicle. The connection terminal has a lower end attached to the coil assembly and an upper end attached to the ECU board. The press-fit terminal has multiple bent portions midway along a vertically rising portion, and also has inclined portions and horizontal portions. The lower end and upper end of the press-fit terminal are disposed at positions offset from each other when viewed from above.

[0003] According to the press-fit terminal of Patent Document 1, vibrations of the coil assembly caused by vibrations while the vehicle is running, etc., can be absorbed and mitigated by the bent portions, inclined portions, horizontal portions, etc. This makes it possible to maintain a good electrical connection between the coil assembly and the ECU board. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2010-234836 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the connection structure of Patent Document 1, the lower end and the upper end of the connection terminal are offset, so a pressing tool is required for the installation of the coil assembly. That is, in the connection structure of Patent Document 1, a pressing tool for pressing the upper end of the terminal at a right angle into the ECU board must be installed below the upper end and pressed. This makes the installation of the coil assembly complicated, and there is a problem in that the cost of preparing the pressing tool and the space required for installation are required. Note that if the connection terminal is made straight, the upper end of the terminal can be pressed at a right angle into the ECU board by pressing the coil assembly, but there is a risk that the function of absorbing vibration of the coil assembly will be impaired.

[0006] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to solve the above problems and to provide a connection terminal which can easily attach a coil assembly while absorbing vibrations and the like of the coil assembly. [Means for solving the problem]

[0007] In order to solve the above problem, the present invention provides a connection terminal for connecting a coil assembly to a substrate, the connection terminal comprising: a coil-side connection part connected to the coil assembly, a substrate-side connection part connected to the substrate, a straight portion extending linearly between a tip end of the coil-side connection part and a base end of the substrate-side connection part, and a detour coupling part formed by detouring the straight portion and coupling the tip end of the coil-side connection part and the substrate-side connection part. The detour coupling part is deformable, and a part of the straight portion is cut off to provide a gap part narrower than the deformation length of the detour coupling part. According to the connection terminal of the present invention, under normal conditions, the straight portion has a gap and the detour coupling portion is deformable, so that vibrations of the coil assembly can be absorbed. When the coil assembly is attached to the board, the detour coupling portion deforms and the gap in the straight portion disappears, so that the end faces facing each other across the gap abut against each other, so that the pressing force can be transmitted linearly from the coil side connection portion to the board side connection portion via the straight portion. This makes it possible to easily attach the coil assembly to the board without using a jig as in the past.

[0008] In the connection terminal of the present invention, the detour coupling portion preferably has a C-shape in a side view. With such a configuration, the detour coupling portion is easily deformed and can deform evenly over its entire length, so that vibrations of the coil assembly can be efficiently absorbed.

[0009] In the connection terminal of the present invention, it is preferable that one of the end faces of the straight portion facing each other across the gap is inclined with respect to the other so as to come into surface contact when the detour connecting portion deforms and comes into contact with the straight portion. With this configuration, when the coil assembly is attached, the detour connecting portion deforms to increase the contact area between the end faces facing each other across the gap, so that the pressing force from the coil assembly can be transmitted to the board-side connecting portion without being released. Effect of the Invention

[0010] According to the connection terminal of the present invention, it is possible to easily attach the coil assembly while absorbing vibrations and the like of the coil assembly. [Brief description of the drawings]

[0011] [Figure 1] 1 is a front view showing a state in which a coil assembly is connected to a substrate using a connection terminal according to an embodiment of the present invention. [Diagram 2] FIG. 11 is a side view showing the coil assembly attached to the substrate. [Diagram 3] 1 is a plan view showing a coil assembly with a connection terminal attached according to an embodiment of the present invention; [Figure 4] FIG. 11 is a perspective view showing the coil assembly with the connection terminals attached thereto. [Diagram 5] FIG. 2 is a diagram showing a straight portion and a detour coupling portion of a connection terminal according to an embodiment of the present invention, and is an enlarged front view of a main portion showing a state in which the detour coupling portion is not deformed. [Figure 6] FIG. 2 is a diagram showing a straight portion and a detour coupling portion of a connection terminal according to an embodiment of the present invention, and is an enlarged front view of a main portion showing a deformed state of the detour coupling portion. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the following, an electronic control device of a brake fluid pressure control device mounted on a vehicle will be described as an example of a device to which a coil assembly is to be assembled, but the purpose is not to limit the device to which the coil assembly is to be assembled. Examples of the vehicle include motorcycles, three-wheeled vehicles, all-terrain vehicles (ATVs), and four-wheeled vehicles, as well as hybrid vehicles that also use a motor, vehicles that are powered only by a motor, and vehicles that are powered only by a fuel cell or an engine (internal combustion engine). In this embodiment, a case where a coil assembly is connected to an ECU board will be described as an example. ECU stands for Electronic Control Unit, and is a general term for a device (unit) that controls a system using electronic circuits. This ECU is installed in an automobile as an electronic control unit that controls, for example, core control such as engine and chassis control, as well as ADAS (Advanced Driver Assistance System).

[0013] FIG. 1 is a front view showing a state in which a coil assembly 1 is connected to a substrate 2 using a connection terminal 10 of this embodiment. FIG. 2 is a side view showing a state in which the coil assembly 1 is attached to a substrate 2 using the connection terminal 10. FIG. 3 is a plan view showing the coil assembly 1 in a state in which the connection terminal 10 is attached. FIG. 4 is a perspective view showing the coil assembly 1 in a state in which the connection terminal 10 is attached. FIG. 5 is a diagram showing a straight portion and a detour connection portion of the connection terminal 10, and is an enlarged front view of a main portion showing a state in which the detour connection portion is not deformed. FIG. 6 is a diagram showing a straight portion and a detour connection portion of the connection terminal 10, and is an enlarged front view of a main portion showing a state in which the detour connection portion is deformed. In this embodiment, the insertion direction of the connection terminal 10 into the substrate 2 is the vertical direction, and in Figures 1 to 4, the side on which the connection terminal 10 is arranged is the upper side of the coil assembly 1, but the actual mounting direction of the coil assembly 1 is not limited to this "vertical direction."

[0014] 1 to 4, in the coil assembly 1, a coil (not shown) formed by winding a wire around a bobbin (not shown) is accommodated in a yoke 3 serving as a housing. A terminal support part 4 supporting a connection terminal 10 is integrally provided on the upper part of the bobbin. The terminal support part 4 is inserted into an insertion hole 5 provided in the yoke 3 and protrudes above the yoke 3 through the insertion hole 5. The lower end of the connection terminal 10 is embedded in the resin terminal support part 4 by insert molding, and the remaining part of the connection terminal 10 protrudes above the terminal support part 4.

[0015] The lower end of the connection terminal 10 embedded in the terminal support portion 4 protrudes downward from the terminal support portion 4 and is electrically connected to the coil winding. A portion of the lower end of the connection terminal 10 protrudes horizontally (see FIGS. 1, 3 and 4). Two connection terminals 10 are provided in the coil assembly 1 and are arranged adjacent to each other. The connection terminal 10 includes a coil side connection portion 11, a board side connection portion 12, a straight portion 13 and a bypass coupling portion 14.

[0016] The coil side connection part 11 is a part that is embedded in the terminal support part 4 and connected to the coil, and is disposed at the lower end part of the connection terminal 10. The coil side connection part 11 extends linearly in the vertical direction.

[0017] The board-side connection part 12 is a part connected to the board 2, and is disposed at the upper end of the connection terminal 10. The board-side connection part 12 includes a mounting part 12a that is mounted on the intermediate wall part 6 (see FIG. 1 and FIG. 2) of the brake fluid pressure control device, and a connection part 12b that is electrically connected to the board 2. The mounting part 12a is formed at the lower part of the board-side connection part 12, and is disposed below the connection part 12b. The intermediate wall part 6 is formed with an insertion hole 6a through which the mounting part 12a of the connection terminal 10 is inserted. The board-side connection part 12 is inserted into the insertion hole 6a from below, and the mounting part 12a is press-fitted and fitted. The board-side connection part 12 extends along the vertical direction, and the mounting part 12a and the connection part 12b are formed in substantially the same straight line. The board 2 is formed with an insertion hole 2a through which the connection part 12b of the connection terminal 10 is inserted. The connection portion 12b has a press-fit portion that is pressure-inserted into the insertion hole 2a. The connection portion 12b may have a structure that is connected to a bus bar, a terminal, or the like (not shown).

[0018] The straight portion 13 is a portion extending in a straight line between the tip end (upper end) of the coil side connection portion 11 and the base end (lower end) of the board side connection portion 12, and transmits the pressing force from the coil side connection portion 11 to the board side connection portion 12 when the connection terminal 10 is fixed to the board 2. That is, the coil side connection portion 11, the board side connection portion 12, and the straight portion 13 are arranged on a straight line. As shown in FIG. 5, the straight portion 13 is partially cut off and has a gap portion 15. In this embodiment, the upper end of the straight portion 13 is cut off, and the gap portion 15 is formed between the upper end of the straight portion 13 and the lower end of the board side connection portion 12. The gap portion 15 is formed narrower than the deformation length of the detour connection portion 14. The deformation length is preferably equal to or less than the elastic limit of the detour connection portion 14. When the connection terminal 10 is fixed to the substrate 2, the detouring connection portion 14 is deformed, so that the gap 15 disappears and the upper end of the straight portion 13 and the lower end of the substrate-side connection portion 12 come into contact with each other. One of the end faces (in this embodiment, the upper end face 16 of the straight portion 13 and the lower end face 17 of the substrate-side connection portion 12) facing each other across the gap 15 is inclined relative to the other. In this embodiment, the lower end face 17 of the substrate-side connection portion 12 is horizontal (the normal line of the lower end face 17 is parallel to the center line of the straight portion 13), and the upper end face 16 of the straight portion 13 is inclined downward as it moves away from the detouring connection portion 14 (the normal line of the upper end face 16 is inclined relative to the center line of the straight portion 13). The inclination angle of the upper end face 16 (the relative angle between the upper end face 16 and the lower end face 17) is an angle at which the upper end face 16 and the lower end face 17 come into surface contact when the detouring connection portion 14 is deformed.

[0019] In this embodiment, the lower end surface 17 is horizontal and the upper end surface 16 is inclined, but the present invention is not limited to this, and the upper end surface 16 may be horizontal and the lower end surface 17 may be inclined so as to rise as it moves away from the detour connecting portion 14. Furthermore, as long as the upper end surface 16 and the lower end surface 17 maintain the above-mentioned relative angle, both surfaces may be inclined with respect to the horizontal plane.

[0020] The detour connection portion 14 is a portion that connects the coil side connection portion 11 and the board side connection portion 12, and is formed by detouring the straight portion 13. The lower end of the detour connection portion 14 is connected to the upper end of the coil side connection portion 11, and the upper end of the detour connection portion 14 is connected to the lower end of the board side connection portion 12. The detour connection portion 14 is deformable, and can move the coil side connection portion 11 and the board side connection portion 12 closer to each other and farther apart. The detour connection portion 14 has a C-shape in a side view, and spreads out on the opposite side from the side facing the adjacent connection terminal 10. That is, the detour connection portion 14 protrudes from the upper end of the coil side connection portion 11 in the opposite direction to the other connection terminal 10, curves upward, and further curves toward the lower end of the board side connection portion 12.

[0021] Next, a procedure for connecting the coil assembly 1 to the board 2 using the connection terminal 10 of this embodiment and the effect of the connection terminal 10 will be described. When connecting the coil assembly 1 to the board 2, first, the connection terminal 10 is embedded in the terminal support portion 4 by insert molding. Then, the terminal support portion 4 is inserted and fixed into the insertion hole 5 provided in the yoke 3, and the coil side connection portion 11 is electrically connected to the coil. Next, the coil assembly 1 is grasped, and the board side connection portion 12 of the connection terminal 10 is pushed toward the insertion hole 6a of the intermediate wall portion 6 and the insertion hole 2a of the board 2. Here, as shown in FIG. 6, the connection terminal 10 is pushed up from the coil assembly 1 side, so that the bypass connection portion 14 is pressed by the coil side connection portion 11 and deformed. The deformation of the bypass connection portion 14 causes the coil side connection portion 11 and the straight portion 13 to rise, and the upper end surface 16 of the straight portion 13 abuts against the upper end surface 16 of the board side connection portion 12. As a result, the coil side connection part 11, the straight part 13 and the board side connection part 12 are arranged in a substantially straight line, so that the pressing force from the coil assembly 1 is efficiently transmitted to the tip part (upper end part) of the connection terminal 10. In particular, the upper end face 16 of the straight part 13 and the lower end face 17 of the board side connection part 12 are in surface contact with each other to form a joint surface 18, so that the upper end face 16 and the lower end face 17 can be in close contact without being misaligned. Therefore, the pressing force from the coil assembly 1 can be transmitted to the board side connection part 12 without escaping. Then, the mounting part 12a of the board side connection part 12 is press-fitted into the insertion hole 6a of the intermediate wall part 6, and the connection part 12b is inserted into the insertion hole 2a. As described above, according to the connection terminal 10 of this embodiment, there is no need to use a jig to hold the connection terminal as in the conventional method. The tip of the connection terminal 10 can be fixed to the substrate 2 and the intermediate wall portion 6 simply by pushing up the coil assembly 1.

[0022] After the connection of the coil assembly 1 is completed, the detour connection part 14 returns to its original shape, and the gap part 15 opens. This makes the detour connection part 14 deformable, allowing the coil side connection part 11 to move up and down and absorb vibrations, etc., of the coil assembly 1. Since the detour connection part 14 is formed in a C-shape when viewed from the side, the detour connection part 14 is easily deformed and can deform evenly over its entire length, so that the vibrations of the coil assembly 1 can be efficiently absorbed.

[0023] Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and can be appropriately modified without departing from the spirit of the present invention. For example, in the above embodiment, the detour connection part 14 is C-shaped when viewed from the side, but is not limited to this. The detour connection part 14 may be an angular shape such as a U-shaped rectangular shape or a sideways V-shaped shape when viewed from the side, instead of a curved shape, or may be a spiral shape.

[0024] In the above embodiment, the upper end of the straight portion 13 is cut and the gap 15 is formed between the straight portion 13 and the board-side connection portion 12, but this is not limited to this. The straight portion may be cut at a middle portion in the height direction to form a gap at the middle portion, or the straight portion may be cut at a lower end to form a gap between the straight portion and the coil-side connection portion. [Explanation of symbols]

[0025] 1 Coil assembly 2. Board 10 Connection terminal 11 Coil side connection part 12 Board side connection part 13 Straight section 14 Detour connection 15 Gap 16 Upper end surface of straight section 17 Bottom end surface of the connection part on the board side

Claims

1. A connection terminal for connecting the coil assembly to a substrate, a coil-side connection portion connected to the coil assembly, a board-side connection portion connected to the board, a straight line portion extending linearly between a tip end portion of the coil-side connection portion and a base end portion of the board-side connection portion, and a detour connection portion formed to detour around the straight line portion and connecting the tip end portion of the coil-side connection portion and the base end portion of the board-side connection portion, The bypass connector is deformable; The straight portion is partially cut off and has a gap that is narrower than the deformation length of the detour connection portion. A connection terminal characterized by:

2. The bypass connection portion has a C-shape in a side view. The connection terminal according to claim 1 .

3. One of the end faces of the straight portion facing each other across the gap is inclined with respect to the other so as to come into surface contact when the detour connecting portion is deformed and comes into contact with the other. The connection terminal according to claim 1 .

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