Terminal connection structure and electronic device

Abstract

To provide a terminal connection structure in which manufacturing costs are reduced, convenience is improved on installation and terminal removal, and terminal rotation and deformation can be prevented.SOLUTION: In an electronic device 1, a fastening member 7 is arranged on a lower side of a flat first connection part 61 of a substrate-side terminal 6, and a connection side terminal 9 is arranged on an upper side of the first connection part 61. Further, a male screw member 8 inserted into through-holes 63, 92 formed on the connection side terminal 9 and the first connection part 61 to screw into a female screw hole 75 of the fastening member 7. The fastening member 7 has a side wall part 72 covering the sides of the first connection part 61 of the substrate-side terminal 6 and a top wall part 73 covering the upper surface of the first connection part 61.SELECTED DRAWING: Figure 5

Description

Technical Field

[0004] ,

[0005] , ,

[0001] The present disclosure relates to a terminal connection structure and an electronic device.

Background Art

[0002] Patent Document 1 discloses a terminal connection structure in which a terminal fastened by a nut is attached to a bolt portion constituting an electrode post of a battery (a connected body). In this terminal connection structure, in order to prevent the terminal from rotating when the nut is fastened, a rotation prevention member is stacked above the terminal and inserted into the bolt portion, and the nut is fastened from above. The rotation prevention member has a tip portion provided along a standing surface standing upright from the upper surface of the battery. When receiving the fastening force of the nut, the tip portion abuts against the standing surface to suppress its own rotation and prevent the terminal from rotating. Further, since the rotation prevention member is placed above the connection portion of the terminal through which the bolt portion is inserted, it is possible to suppress deformation of the terminal due to the fastening force of the nut.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the technique described in Patent Document 1 above, in order to prevent rotation and deformation of the terminal, components configured separately from the fastening member are required, so there is a problem that the number of components increases and the manufacturing cost increases. In addition, there is a possibility that the rotation prevention member may be lost when the terminal is attached or detached, and the convenience is not good.

[0005] This disclosure is made to solve the above problems and aims to provide a terminal connection structure that can prevent rotation and deformation of terminals, thereby reducing manufacturing costs and improving convenience when attaching or detaching terminals. [Means for solving the problem]

[0006] A terminal connection structure according to a first aspect of this disclosure is electrically connected to a wiring board. It is equipped with a rectangular flat plate-shaped connecting part with the front-to-back direction as the longitudinal direction and the up-to-down direction as the thickness direction. Circuit board side terminals, A terminal connection structure comprising a fastening member attached to the substrate-side terminal and a connecting-side terminal connected to the substrate-side terminal via the fastening member, wherein the substrate-side terminal and the connecting-side terminal are connected by inserting a male screw member through the connecting portion and the connecting-side terminal and screwing it into a female screw hole formed in the fastening member while the fastening member is attached to the substrate-side terminal, The fastening member is the Connection part of under The lower wall portion that covers the surface, and the aforementioned Connection part A pair of left and right side walls covering the sides, It has a pair of left and right upper wall portions that extend from the upper ends of the left and right side wall portions so as to face the lower wall portion and cover the portion in front of the insertion position of the male screw member on the upper surface of the connecting portion and the left and right ends behind the insertion position. . [Effects of the Invention]

[0007] According to the terminal connection structure of this disclosure, a board-side terminal electrically connected to a wiring board and a connection-side terminal connected to the board-side terminal are connected using a flat fastening member and a male screw member. The fastening member has a female screw hole and is positioned on one side of the flat connection portion of the board-side terminal. The male screw member is inserted through a through hole formed in the connection portion between the connection-side terminal and the board-side terminal and screwed into the female screw hole of the fastening member, thereby connecting the board-side terminal and the connection-side terminal.

[0008] Here, the fastening member has a wall portion that covers the side surface of the connection portion of the substrate-side terminal and the other side surface of the connection portion to which the connection-side terminal is connected. Therefore, when a torque force is applied to the substrate-side terminal via the connection-side terminal during fastening of the male screw member, the side surface of the connection portion of the substrate-side terminal comes into contact with the wall portion of the fastening member, suppressing its own rotation. Also, when the connection portion of the substrate-side terminal attempts to deform toward the connection-side terminal due to a load component acting axially from the male screw member, the connection portion comes into contact with the wall portion that covers the other side surface of the connection portion, suppressing its own deformation.

[0009] Thus, in the above terminal connection structure, the rotation and deformation of the substrate-side terminal can be suppressed by the fastening member, eliminating the need for a separate restricting component to control the rotation and deformation of the substrate-side terminal. Consequently, the number of parts is reduced, and the risk of losing parts during terminal installation and removal is lowered, thereby reducing manufacturing costs and improving convenience during terminal installation and removal. [Brief explanation of the drawing]

[0010] [Figure 1] This is a plan view of the electronic device according to this embodiment. [Figure 2] This is an exploded perspective view of the terminal connection structure applied to the electronic device according to this embodiment. [Figure 3] This is a planar perspective view of the substrate-side terminal according to this embodiment. [Figure 4] (A) is a plan view of the fastening member according to this embodiment, and (B) is a bottom view of the fastening member. [Figure 5] (A) is a partial cross-sectional view showing a portion of the terminal block's cross-section in the up, down, left, and right directions, and (B) is a partial plan view of the terminal block. [Figure 6] This is a first modified example of the fastening member according to this embodiment, and is a planar perspective view corresponding to Figure 4(A). [Figure 7] This is a second modified example of the fastening member according to this embodiment, and is a plan view perspective corresponding to Figure 4(A). [Figure 8] This is a third modified example of the fastening member according to this embodiment, and is a partial cross-sectional view corresponding to Figure 5(A). [Modes for carrying out the invention]

[0011] Hereinafter, embodiments of the present disclosure will be described with reference to Figures 1 to 5. In these embodiments, for the sake of explanation, the directions indicated by the up / down, left / right, and front / back arrows shown as appropriate in each figure will be defined as the up / down direction, left / right direction, and front / back direction of the electronic device 1, respectively. In addition, some reference numerals may be omitted in each figure to improve the clarity of the drawings.

[0012] As shown in Figures 1 and 2, the electronic device 1 comprises a case 2, a circuit board 3 housed inside the case 2, and a terminal block 4 mounted on the case 2. The circuit board 3 comprises a wiring board 3A on which conductive wiring patterns are applied to the surface and interior of an insulating substrate, and a plurality of electronic components mounted on the wiring board 3A. The wiring board 3A has a control unit (not shown) which includes a plurality of circuit elements such as a CPU as an example of a plurality of electronic components, and a plurality of semiconductor elements 3B mounted on it. The control unit and the plurality of semiconductor elements 3B are electrically connected by wiring patterns formed on the wiring board 3A. The plurality of semiconductor elements 3B can be configured as rectifier elements in a rectifier circuit, switching elements in an inverter circuit, etc., under the control of the control unit.

[0013] Case 2 is a box-shaped member with an upward opening, and is made of a metal such as aluminum or iron, for example. Case 2 comprises a front wall 2A, a rear wall 2B, a left wall 2C, a right wall 2D, and a bottom wall 2E. A terminal block mounting section 5 is formed in the rear wall 2B of Case 2. The terminal block mounting section 5 is a groove that penetrates the rear wall 2B in the front-to-back direction and opens upward. A terminal block 4 is mounted in the terminal block mounting section 5.

[0014] The terminal block 4 comprises a resin base portion 40, five substrate-side terminals 6 provided on the base portion 40, and five fastening members 7 positioned on the front end (rear end) of each substrate-side terminal 6. The base portion 40, the five substrate-side terminals 6, and the five fastening members 7 are integrally formed by insert molding.

[0015] The base portion 40 has a vertical wall portion 42 and a horizontal wall portion 44, and forms a substantially L-shaped block body as a whole. The vertical wall portion 42 is a vertical wall having a predetermined thickness in the front-rear direction. Groove portions 43 that fit into the terminal block mounting portion 5 are formed on both left and right side surfaces of the vertical wall portion 42. In a state where the terminal block 4 is mounted on the case 2, the vertical wall portion 42 becomes a part of the rear wall portion 2B of the case 2 and partitions the inside and outside of the case 2. Five substrate-side terminals 6 are integrally provided on this vertical wall portion 42 by insert molding. Each of the five substrate-side terminals 6 is provided in a state of penetrating the vertical wall portion 42 in the front-rear direction. One end portion (the front end portion in FIG. 1) of the substrate-side terminal 6 protruding from the vertical wall portion 42 is electrically connected to the wiring board 3A housed in the case 2. Also, the other end portion (the rear end portion in FIG. 1) protruding from the vertical wall portion 42 is connected to the connection-side terminal 9 attached to the tip of the cable 90 outside the case 2. The detailed configuration of this substrate-side terminal 6 will be described later.

[0016] The horizontal wall portion 44 of the base portion 40 protrudes rearward from the rear surface of the vertical wall portion 42 and forms a rectangular parallelepiped block body. On the upper surface side of this horizontal wall portion 44, the rear end portions of the substrate-side terminals 6 protruding rearward (outside the case 2) of the vertical wall portion 42 are arranged. A plurality of partition wall portions 46 are erected on the upper surface of the horizontal wall portion 44. Each of the plurality of partition wall portions 46 is formed between the substrate-side terminals 6 to provide insulation between the terminals and forms five accommodation spaces S arranged in the left-right direction on the upper surface side of the horizontal wall portion 44. A fastening member 7 is housed in each of the five accommodation spaces S. The fastening member 7 is integrally provided on the base portion 40 by insert molding in a state where each is mounted on the corresponding substrate-side terminal 6.

[0017] In the terminal block 4 configured as described above, when the vertical wall portion 42 of the base portion 40 is attached to the case 2 via the terminal block attachment portion 5, the rear ends of the five board-side terminals 6 are exposed on the upper surface of the horizontal wall portion 44 protruding outside the case 2. Connection-side terminals 9 are connected to the rear ends of these board-side terminals 6 using fastening members 7 and male screw members 8 arranged in the terminal block 4. As an example, the connection-side terminal 9 is composed of a crimp terminal attached to the tip of a cable 90, and has a through hole 92 through which the male screw member 8 is inserted at the tip portion for connection to the board-side terminal 6. The male screw member 8 of the present embodiment is composed of a bolt as an example. Hereinafter, the configurations of the board-side terminal 6 and the fastening member 7 will be described in detail.

[0018] As shown in FIG. 3, the board-side terminal 6 has a flat plate-shaped first connection portion 61 and a second connection portion 62 provided on one end side (front end side in FIG. 3) of the first connection portion 61. As an example, the board-side terminal 6 is formed by bending a sheet metal. The first connection portion 61 is formed in a flat plate shape that is long in the front-rear direction and has a predetermined thickness in the up-down direction. In a state where the board-side terminal 6 is inserted into the base portion 40, the first connection portion 61 is arranged in a state of penetrating the vertical wall portion 42 of the base portion 40 in the front-rear direction. In the first connection portion 61, a through hole 63 penetrating the first connection portion 61 in the up-down direction is formed at the rear end portion protruding behind the vertical wall portion 42. As shown in FIG. 5(A), in a state where the connection-side terminal 9 is connected to the first connection portion 61, the through hole 63 of the board-side terminal 6 and the through hole 92 of the connection-side terminal 9 are coaxially arranged, and the male screw member 8 is inserted from the upper side.

[0019] The second connecting portion 62 is integrally provided on the front end side of the first connecting portion 61. The second connecting portion 62 is a long plate piece with its thickness in the left-right direction and elongated in the front-rear direction, and stands almost perpendicular to the flat first connecting portion 61. The tip of the second connecting portion 62 extends forward from the front end of the first connecting portion 61, and when the substrate-side terminal 6 is inserted into the base portion 40, it protrudes forward from the vertical wall portion 42 of the base portion 40. That is, as shown in Figure 2, when the terminal block 4 is mounted in the case 2, the second connecting portion 62 protrudes toward the wiring board 3A housed in the case 2. The second connecting portion 62 is electrically connected to the wiring board 3A by being soldered or welded while being sandwiched between clip-shaped connecting terminals 32 mounted on the upper surface of the wiring board 3A.

[0020] As shown in Figures 4(A) and 4(B), the fastening member 7 has a flat lower wall portion 71, left and right side wall portions 72 extending upward from both left and right ends of the lower wall portion 71, and left and right upper wall portions 73 extending from the upper ends of the left and right side wall portions 72 so as to face the lower wall portion 71. The fastening member 7 is formed, as an example, by bending sheet metal. The lower wall portion 71 of the fastening member 7 is formed in the shape of a rectangular plate and has a predetermined plate thickness in the vertical direction. A cylindrical protrusion 74 is formed on the lower surface of the lower wall portion 71, and a female screw hole 75 is formed in the protrusion 74 and the lower wall portion 71, penetrating vertically through the center of the protrusion 74. The female screw hole 75 is a through hole that penetrates vertically through the lower wall portion 71 and the protrusion 74, and a female screw portion is formed on its inner surface.

[0021] The side walls 72 of the fastening member 7 extend upward from the left and right ends of the lower wall 71 described above. The upper wall 73 of the fastening member 7 is provided on the left and right side walls 72, extending from the upper ends of the left and right side walls 72 in a direction toward each other, and is positioned opposite the lower wall 71.

[0022] As shown in Figure 5(A), the fastening member 7 is insert-molded into the terminal block 4 and fixed inside the housing space S formed in the side wall portion 44 of the base portion 40. In this state, the side surface of the fastening member 7 is in contact with and supported by the vertical wall portion 42 and the partition wall portion 46 of the base portion 40. The fastening member 7 is positioned below the first connection portion 61 of the substrate-side terminal 6, and the lower wall portion 71, the left and right side walls 72, and the left and right upper walls 73 support the first connection portion 61 of the substrate-side terminal 6. Specifically, the lower wall portion 71 covers the lower surface of the first connection portion 61, the left and right side walls 72 cover the left and right sides of the first connection portion 61, and the left and right upper walls 73 cover a part of the upper surface of the first connection portion 61.

[0023] Here, the left and right upper wall portions 73 are spaced apart in the left-right direction at their tip ends. Therefore, a portion of the upper surface of the first connection portion 61 of the substrate-side terminal 6 is exposed between the left and right upper wall portions 73. The connecting-side terminal 9 is placed on this first connection portion 61 from above, and the male screw member 8 is inserted through the connecting-side terminal 9 from above. The ends of the left and right upper wall portions 73 that form the tips and face the side surface of the connecting-side terminal 9 are cut out along the outline of the connecting-side terminal 9. Therefore, the tips of the left and right upper wall portions 73 are positioned close to and facing the side surface (left and right sides) of the connecting-side terminal 9. Note that Figures 5(A) and 5(B) show an example of a state where the tips of the left and right upper wall portions 73 and the side surface of the connecting-side terminal 9 are positioned close to and spaced apart, but this is not the only possible configuration. The state in which the tips of the left and right upper wall portions 73 and the sides of the connecting terminals 9 are positioned close to each other also includes the state in which the tips of the left and right upper wall portions 73 and the sides of the connecting terminals 9 are in contact with each other.

[0024] The male threaded portion of the male threaded member 8 is inserted through the first connecting portion 61 of the substrate-side terminal 6 and the through holes 63 and 92 formed at the tip of the connecting-side terminal 9, and is screwed into the female threaded hole 75 of the fastening member 7. In this way, the fastening member 7 forms a nut and the male threaded member 8 forms a bolt, thereby fastening and fixing the substrate-side terminal 6 and the connecting-side terminal 9 together. At this time, the torque force of the male threaded member 8 acts on the substrate-side terminal 6 via the connecting-side terminal 9. On the substrate-side terminal 6, the side surface of the first connecting portion 61 abuts against the side wall portion 72 of the fastening member 7, thereby restricting its own rotation.

[0025] On the connecting terminal 9 side, the side surface of the connecting terminal 9 abuts against the tip of the upper wall portion 73, which is positioned in close proximity to it, thereby restricting its rotation. Providing a means to restrict the rotation of the connecting terminal 9 in this way is effective in ensuring that the insulation distance between multiple connecting terminals 9 is reliably maintained. As shown in Figure 5(B), the orientation of the connecting terminal 9 relative to the terminal block 4 may vary due to the torque force acting from the male screw member 8 and the assembly accuracy of the worker. However, by restricting the rotation of the connecting terminal 9 with the fastening member 7, it is possible to prevent the insulation distance between terminals from being compromised due to such assembly variations. Therefore, it becomes possible to set a shorter distance between terminals at the substrate-side terminal 6 and the connecting terminal 9, and the terminal block 4 can be made smaller.

[0026] Furthermore, the torque force of the male screw member 8 also acts on the fastening member 7 via the connecting terminal 9 and the substrate terminal 6. In the fastening member 7, the side surface of the fastening member 7 abuts against the vertical wall portion 42, the horizontal wall portion 44, and the partition wall portion 46 of the base portion 40 of the terminal block 4, thereby restricting its own rotation.

[0027] Furthermore, since a fastening member 7 having a female screw hole 75 is arranged on the resin terminal block 4 and a male screw member 8 is screwed into it, the end faces of the fastening member 7 and the male screw member 8 are in metal-to-metal contact (direct contact) with the substrate-side terminal 6 and the connection-side terminal 9. As a result, the load during fastening is suppressed from acting on the resin base portion 40, and loosening due to creep of the base portion 40 can be suppressed. That is, when the connection structure of the substrate-side terminal 6 and the connection-side terminal 9 of this embodiment is applied to a high-current circuit, depending on the usage conditions of the electronic device 1, the connection portion between the substrate-side terminal 6 and the connection-side terminal 9 may generate heat due to contact resistance. Even in such cases, in this embodiment, since the load during fastening is prevented from acting on the base portion 40, creep of the base portion 40 of the terminal block 4 is prevented in high-temperature environments. Moreover, even if creep occurs in the base portion 40, the structure prevents a decrease in the fastening load between the terminals.

[0028] In this case, if the fastening strength between the substrate-side terminal 6 and the connecting-side terminal 9 is increased, the axial load component transmitted from the male screw member 8 makes the flat first connecting portion 61 prone to warping. In this embodiment, the upper surface of the first connecting portion 61 abuts against the upper wall portion 73 of the fastening member 7, suppressing its own deformation, and thus preventing the substrate-side terminal 6 from warping.

[0029] (Mechanism of action and effect) As described above, in this embodiment, a board-side terminal 6 electrically connected to the wiring board 3A and a connecting-side terminal 9 connected to the board-side terminal 6 are connected using a flat fastening member 7 and a male screw member 8. The fastening member 7 has a female screw hole 75 and is positioned below (on one side of) the flat first connecting portion 61 of the board-side terminal 6. The male screw member 8 is inserted through the first connecting portion 61 of the board-side terminal 6 and the through holes 63, 92 formed in the connecting-side terminal 9, and is screwed into the female screw hole 75 of the fastening member 7, thereby connecting the board-side terminal 6 and the connecting-side terminal 9.

[0030] Here, the fastening member 7 has a side wall portion 72 that covers the side surface of the first connection portion 61 of the substrate-side terminal 6, and an upper wall portion 73 that covers the upper surface (the other side surface) of the first connection portion 61 to which the connecting-side terminal 9 is connected. Therefore, when the male screw member 8 is fastened, if a torque force is applied to the substrate-side terminal 6 via the connecting-side terminal 9, the side surface of the first connection portion 61 of the substrate-side terminal 6 comes into contact with the side wall portion 72 of the fastening member 7, suppressing its own rotation. Also, if the flat plate-shaped first connection portion 61 attempts to deform toward the connecting-side terminal 9 due to the load component acting axially from the male screw member 8, the upper surface of the first connection portion 61 comes into contact with the upper wall portion 73, suppressing its own deformation.

[0031] Thus, in the above embodiment, the fastening member 7 can suppress the rotation and deformation of the substrate-side terminal 6. Therefore, a separate restricting component is not required to restrict the rotation and deformation of the substrate-side terminal 6. Consequently, the number of parts is reduced, and the risk of losing parts when attaching or detaching the terminals is reduced, thereby reducing manufacturing costs and improving convenience when attaching or detaching the terminals.

[0032] Furthermore, in this embodiment, the upper wall portion 73 of the fastening member 7 is positioned so that its tip (one end) is close to and facing the left and right sides of the connecting terminal 9. Therefore, when a torque force is applied to the connecting terminal 9, the side of the connecting terminal 9 comes into contact with the tip of the upper wall portion 73, suppressing its own rotation. This prevents the insulation distance between the connecting terminal 9 and surrounding parts from being compromised due to variations during assembly. In addition, when multiple connecting terminals 9 are connected to the terminal block 4, the distance between terminals can be shortened to reduce the size of the terminal block 4.

[0033] Furthermore, in this embodiment, the fastening member 7 is positioned on the terminal block 4 (side wall portion 44), and the end faces of the fastening member 7 and the male screw member 8 are in metal-to-metal contact (direct contact) with the substrate-side terminal 6 and the connection-side terminal 9. This suppresses the load applied to the terminal block 4 during fastening, prevents loosening of the terminal block 4 due to creep, and ultimately allows for handling of high current requirements.

[0034] Furthermore, in this embodiment, the substrate-side terminal 6 and the fastening member 7 are integrally formed by insert molding into the terminal block 4. This allows the substrate-side terminal 6 and the fastening member 7 to reliably contact their sides with the wall of the terminal block 4, thereby restricting rotation.

[0035] Furthermore, since the fastening member 7 of this embodiment can be integrally formed by bending a single sheet of metal, it can be easily manufactured and offers excellent productivity.

[0036] (First modified example of the fastening member) Hereinafter, with reference to Figure 6, a first modified example of the fastening member 7 according to the above embodiment will be described. Note that components identical to those in the above-described embodiment will be given the same numbers and their descriptions will be omitted. The fastening member 200 according to the first modified example is characterized in that the side wall portion 204 and the upper wall portion 206 are continuously provided on only one of the left and right sides of the lower wall portion 202. The other components are the same as those in the above embodiment.

[0037] As shown in Figure 6, the fastening member 200 has a flat lower wall portion 202, a side wall portion 204 continuously provided on one end of the lower wall portion 202, and an upper wall portion 206 continuously provided on one end of the side wall portion 204. The lower wall portion 202 corresponds to the configuration of the lower wall portion 71 in the above embodiment and has a protrusion 208 projecting from the lower surface of the lower wall portion 202 and a female screw hole 210 passing through the protrusion 208. The lower wall portion 202, the protrusion 208, and the female screw hole 210 have the same configuration as the lower wall portion 71, the protrusion 74, and the female screw hole 75 in the above embodiment, so a detailed explanation is omitted. The side wall portion 204 is continuously provided on the lower wall portion 202 on one end (the left end in Figure 6) on the fastening direction R side of the male screw member 8. The upper wall portion 206 is provided continuously with the upper end of the side wall portion 204 and is positioned opposite the lower wall portion 202. The tip of the upper wall portion 206 is cut out to follow the outer shape of the connecting terminal 9.

[0038] According to the above configuration, the fastening member 200 is positioned below the substrate-side terminal 6, the connecting-side terminal 9 is placed above the substrate-side terminal 6, and the male screw member 8 is inserted through the through holes 63 and 92 of the substrate-side terminal 6 and the connecting-side terminal 9 and screwed into the female screw hole 210. At this time, the side surface (left side) of the male screw member 8 on the fastening direction R side of the substrate-side terminal 6 abuts against the side wall portion 204 of the fastening member 200, suppressing its own rotation. Also, the upper surface of the substrate-side terminal 6 abuts against the upper wall portion 206 of the fastening member 200, restricting its own deformation. Furthermore, at the connecting-side terminal 9, the side surface (left side) of the male screw member 8 on the fastening direction R side is positioned close to and opposite the tip of the upper wall portion 206, and its own rotation is restricted by abutting against the upper wall portion 206. Thus, even if the fastening member 200 is applied in place of the fastening member 7 described above in the above embodiment, the same action and effect can be obtained. Since the fastening member 200 has a configuration in which the side wall portion 204 and the upper wall portion 206 are formed only on one side of the lower wall portion 202, it is easier to manufacture and has excellent productivity.

[0039] (Second modified example of the fastening member) Hereinafter, a second modified example of the fastening member 7 according to the above embodiment will be described with reference to Figure 7. Note that components identical to those in the above-described embodiment will be given the same numbers and their descriptions will be omitted. The fastening member 300 according to the second modified example is characterized by having a rising portion 312 that is continuously provided at the tip (one end) of the upper wall portion 306 and rises upward. Other components are the same as those in the above embodiment.

[0040] The fastening member 300 has a flat, plate-shaped lower wall portion 302, left and right side wall portions 304 provided continuously at both the left and right ends of the lower wall portion 302, and left and right upper wall portions 306 provided continuously at the upper ends of the left and right side wall portions 304. The lower wall portion 302 also has a protrusion 308 that projects from the lower surface of the lower wall portion 302 and a female screw hole 310 that penetrates the protrusion 308. The configuration of the lower wall portion 302, side wall portions 304, upper wall portion 306, protrusion 308, and female screw hole 310 is the same as the configuration of the lower wall portion 71, side wall portion 72, upper wall portion 73, protrusion 74, and female screw hole 75 in the above embodiment, so a description is omitted. The rising portion 312 is provided at the rear end of the upper wall portion 306 and extends upward. This rising portion 312 rises along the side of the connecting terminal 9 when it is superimposed on the upper side of the substrate-side terminal 6, and is positioned in close proximity to the side of the connecting terminal 9. When a torque force is applied to the connecting terminal 9, the side of the connecting terminal 9 comes into contact with the rising portion 312, restricting its rotation.

[0041] Since the fastening member 300 with the above configuration basically follows the configuration of the fastening member 7 according to the above embodiment, similar functions and effects can be obtained. Furthermore, by providing a rising portion 312 in the fastening member 300, the contact surface between the side surface of the connecting terminal 9 and the side surface of the fastening member 7 that restricts the rotation of the connecting terminal 9 can be increased. As a result, the rotation of the connecting terminal 9 can be stably restricted, thereby increasing the torque force of the male screw member 8 and increasing the fastening strength.

[0042] In the fastening member 300, a pair of side wall portions 304 and a pair of upper wall portions 306 are provided continuously at both the left and right ends of the lower wall portion 302. However, similar to the fastening member 200 according to the first modified example described above, the lower wall portion 302 may be configured such that the side wall portion 304, upper wall portion 306, and rising portion 312 are provided only at one end (the left end in Figure 7) on the fastening direction side of the male screw member.

[0043] (Third modified example of the fastening member) In the above embodiment, the connecting terminal 9 connected to the substrate-side terminal 6 is composed of a crimp terminal attached to the end of the cable 90, but the disclosure is not limited to this. The connecting terminal may be a flat terminal member, similar to the substrate-side terminal 6. In this case, as a preferred configuration to prevent the connecting terminal from bending due to the axial load component acting from the male screw member 8, it is possible to apply the fastening member 400 according to the third modified example shown in Figure 8 in place of the fastening member 7 in the above embodiment.

[0044] As shown in Figure 8, the fastening member 400 according to the third modified example has a flat lower wall portion 402, left and right side wall portions 404 provided continuously from one end of the lower wall portion 402, and left and right upper wall portions 406 provided continuously from one end of the left and right side wall portions 404. The lower wall portion 402 has a protrusion 408 that protrudes from the lower surface of the lower wall portion 402, and a female screw hole 410 that penetrates the protrusion 408, similar to the lower wall portion 71 of the above embodiment. On the upper side of the lower wall portion 402, a first connection portion 61 of the substrate-side terminal 6, which is formed in the shape of a flat plate, and a connection-side terminal 500, which is formed in the shape of a flat plate, are arranged, and a male screw member 8 is inserted through the through holes 63, 502 of the substrate-side terminal 6 and the connection-side terminal 500 and screwed into the female screw hole 410 of the fastening member 400. In the fastening member 400, a pair of left and right side wall portions 404 extending upward are formed at both the left and right ends of the lower wall portion 402. The pair of side wall portions 404 are arranged to cover the sides of the first connection portion 61 and the connection-side terminal 500 of the substrate-side terminal 6, and restrict the rotation of the sides of the first connection portion 61 and the connection-side terminal 500. At the upper ends of the pair of left and right side wall portions 404, a pair of left and right upper wall portions 406 are formed, extending toward each other and facing the lower wall portion 402. The pair of upper wall portions 406 are arranged to cover the upper surface of the connection-side terminal 500, and restrict the deformation of the first connection portion 61 and the connection-side terminal 500.

[0045] Thus, by applying the fastening member 400 according to the third modified example in place of the fastening member 7 of the above embodiment, it becomes possible to prevent rotation and deformation of the connection-side terminal 500 in addition to the substrate-side terminal 6.

[0046] In the above embodiment, a configuration was described in which the substrate-side terminal 6 and the fastening member 7 are integrally formed with the terminal block 4 by insert molding, but this disclosure is not limited thereto. The substrate-side terminal 6 and the fastening member 7 may also be integrally formed with the molded terminal block 4 by outsert molding. [Explanation of Symbols]

[0047] 1 Electronic equipment 2 cases 3A Wiring Board 4 Terminal block 6. Circuit board side terminals 7 Fastening members 8 Male threaded member 9. Connection terminals 61 First connection part (connection part) 63 Through hole 71 Lower wall part 72 Side wall section (wall section) 73 Upper wall section (wall section) 75 Female threaded holes 92 Through hole 200 Fastening members 202 Lower wall part 204 Side wall section 206 Upper wall section 210 Female threaded holes 300 Fastening members 302 Lower wall part 304 Side wall section 306 Upper wall section 310 Female threaded hole 312 Riser section 400 Fastening members 402 Lower wall part 404 Side wall section 406 Upper wall section 410 Female threaded hole 500 Connection side terminal 502 Through hole

Claims

1. A circuit board-side terminal that is electrically connected to the wiring board and has a rectangular, flat connection portion with the front-to-back direction as the longitudinal direction and the up-to-down direction as the thickness direction, The fastening member attached to the terminal on the substrate side, It has a connecting terminal connected to the substrate-side terminal via the fastening member, A terminal connection structure that connects the substrate-side terminal and the connecting-side terminal by inserting a male screw member through the connecting portion and the connecting-side terminal and screwing it into a female screw hole formed in the fastening member, with the fastening member attached to the substrate-side terminal, The fastening member has a lower wall portion that covers the lower surface of the connection portion, a pair of left and right side wall portions that cover the sides of the connection portion, and a pair of left and right upper wall portions that extend from the upper ends of the left and right side wall portions so as to face the lower wall portion and cover the portion in front of the insertion position of the male screw member on the upper surface of the connection portion and the left and right ends behind the insertion position.

2. The terminal connection structure according to claim 1, wherein the upper wall portion of the fastening member is positioned in close proximity to and opposite to the side surface of the connecting terminal.

3. The terminal connection structure according to claim 2, having a rising portion that is continuously provided at the tip of the upper wall portion of the fastening member and rises along the side surface of the connecting terminal.

4. The terminal connection structure according to any one of claims 1 to 3, wherein the connecting terminal is a crimp terminal attached to the end of the cable.

5. Wiring board and A case for housing the aforementioned wiring board, A circuit board-side terminal electrically connected to the aforementioned wiring board, having a rectangular flat plate-shaped connection portion with the front-to-back direction as the longitudinal direction and the up-to-down direction as the thickness direction, The case comprises a terminal block provided in the case and a fastening member attached to the terminal on the circuit board side, With the fastening member attached to the substrate-side terminal, the male screw member is inserted through the connecting-side terminal that connects to the substrate-side terminal and screwed into the female screw hole formed in the fastening member, thereby connecting the substrate-side terminal and the connecting-side terminal. The fastening member comprises a lower wall portion covering the lower surface of the connection portion, a pair of left and right side wall portions covering the sides of the connection portion, and a pair of left and right upper wall portions extending from the upper ends of the left and right side wall portions so as to face the lower wall portion and covering the portion in front of the insertion position of the male screw member on the upper surface of the connection portion and the left and right ends behind the insertion position.

6. The electronic device according to claim 5, wherein the substrate-side terminal and the fastening member are insert-molded into the terminal block.

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