Busbar Module

Abstract

To provide a bus bar module capable of easily positioning a bus bar, and fixing the bus bar.SOLUTION: A bus bar module 1 connected to an electron component, includes: a main body part 10; an electron component housing part that houses the electron component; a first bus bar 20 that is embedded into the main body part and is connected to the electron component; second bus bars 30 and 40 that are arranged to a front surface and comprise at least one extension part. Each second bus bar includes penetration holes 314 and 415 to the extension part, and each penetration hole includes inner wall surfaces 701, 702. An inner wall surface has a flat shape, and the inner wall surface is opposite. The main body part includes on the front surface, positioning protrusion parts 108, 109 which have an outer wall whose cross sectional shape parallel to the front surface is formed in a similar shape to that of the penetration hole or which is along the inner wall surface. Each positioning protrusion part is penetrated in each penetration hole in order to determine a position of each second bus bar in the front surface, and each second bus bar of which the position is determined is connected to the first bus bar exposed to the front surface of the main body part.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present invention relates to a bus bar module connected to an electronic component. [Background technology]

[0002] An example of a device for fixing a bus bar to an insulating member is disclosed in Patent Document 1. According to Patent Document 1, the bus bar is fixed by fitting a concave bent portion formed on the bus bar into a concave groove in the insulating member and then fitting a fixture into the concave groove. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 5-23728 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the busbar fixing device of Patent Document 1 requires a complex manufacturing process because the busbar is bent into a concave shape and then the concave bent portion is fitted into a groove in the insulating member to position it, and it takes a long time to connect multiple busbars. Furthermore, in Patent Document 1, the busbar is fixed with a fixture after being positioned, which increases the number of parts required to fix one busbar. For this reason, the technology disclosed in Patent Document 1 does not allow for efficient positioning and fixing of multiple busbars.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a bus bar module that allows bus bars to be easily positioned and fixed. [Means for solving the problem]

[0006] According to one aspect of the present invention, there is provided a busbar module for connecting to an electronic component, the busbar module comprising: a main body; an electronic component accommodating portion for accommodating the electronic component; a first busbar incorporated in the main body and connected to the electronic component; and a second busbar arranged on the surface and having at least one extension portion, wherein the second busbar has a through hole in the extension portion, the through hole having an inner wall surface that is flat and facing each other; the main body has a positioning protrusion on the surface, the positioning protrusion having an outer wall whose cross section parallel to the surface is similar to that of the through hole or follows the inner wall surface; the positioning protrusion penetrates the through hole to determine the position of the second busbar on the surface; and the positioned second busbar is connected to the first busbar exposed on the surface of the main body. [Effects of the Invention]

[0007] According to the present invention, the bus bar can be easily positioned and fixed. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is an exploded perspective view of a sensor unit that employs a bus bar module according to an embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view showing the structure of an embedded bus bar incorporated into the main body of the bus bar module according to this embodiment. [Figure 3] Fig. 3 is a perspective view of a case where a sensor is connected to the built-in bus bar shown in Fig. 2. Fig. 3 is a flowchart showing a line selection control method according to the present embodiment. [Figure 4] FIG. 4 is a plan view of the built-in bus bar shown in FIG. 2 and the bridge bus bar connected to the built-in bus bar. [Figure 5] FIG. 5 is a plan view showing the correspondence between the connection portions of the bridge bus bar and the connection portions of the surface of the main body portion into which the built-in bus bar shown in FIG. 2 is built. [Figure 6] FIG. 6 is an enlarged plan view of a connection portion in the bus bar module according to this embodiment. [Figure 7] 7 is a cross-sectional view of the connection portion shown in FIG. 6 taken along line II. [Figure 8] FIG. 8 is an enlarged plan view of the positioning mechanism and the movement suppression mechanism in the bus bar module according to this embodiment. [Figure 9] FIG. 9 is an enlarged perspective view schematically showing an example of a positioning mechanism in the bus bar module according to the present embodiment. [Figure 10] 10 is a cross-sectional view of the positioning mechanism shown in FIG. 9 taken along line AA. [Figure 11] 11 is a cross-sectional view of the positioning mechanism shown in FIG. 9 taken along line BB. [Figure 12] 12 is a cross-sectional view of the movement restricting mechanism shown in FIG. 9 taken along line CC. [Figure 13] 13 is a cross-sectional view of the movement restricting mechanism shown in FIG. 9 taken along line DD. [Figure 14] FIG. 14 is a plan view showing an example of a bridge bus bar in the bus bar module according to this embodiment. [Figure 15] FIG. 15 is a plan view showing another example of the bridge bus bar in the bus bar module according to this embodiment. [Figure 16] FIG. 16 is a perspective view of a sensor module that employs the bus bar module according to this embodiment. [Figure 17] FIG. 17 is an exploded perspective view of the final sensor module in which a cover is attached to the sensor module employing the bus bar module according to this embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described in detail with reference to Figures 1 to 17. However, the components described in the following embodiments are merely examples, and are not intended to limit the technical scope of the present invention to only those components.

[0010] 1 to 17, for the sake of convenience, three mutually orthogonal axes are defined as the X-axis, Y-axis, and Z-axis. Here, as an example, the XY plane is a horizontal plane, and the Z-axis is a vertical direction orthogonal to the horizontal plane. However, in this specification, the up-down direction, horizontal direction, upper side, lower side, X / Y / Z axis directions, and the positive and negative directions of each axis direction are simply names for the convenience of describing the relative positional relationship of each part. The actual positional relationship may be one other than the positional relationship indicated by the names.

[0011] 1. Main unit configuration As illustrated in FIG. 1 , a busbar module 1 according to one embodiment of the present invention includes a main body 10, an embedded busbar 20 serving as a first busbar, and bridge busbars 30 and 40 serving as second busbars. The main body 10 is made of an insulating material such as resin and has the embedded busbar 20 embedded therein. The main body 10 has a surface 101 (here, in the direction of the XY plane), and a peripheral wall 102 is formed around the periphery of the surface 101. As described below, openings 103 to 107, positioning protrusions 108 and 109, and a movement prevention portion 110 are provided on the surface 101 of the main body 10, and further, connection portions 201 to 206 of the embedded busbar 20 are exposed. The bridging busbars 30 and 40 are disposed on the surface 101 of the main body 10 and are connected to the connection portions 201 to 206 of the embedded busbar 20 as described below.

[0012] Openings 103-107 penetrate main body 10 in the Z-axis direction and serve as electronic component accommodating sections, exposing electronic component connection electrodes of built-in bus bar 20, which will be described later. Positioning protrusions 108 and 109 function to position bridge bus bars 30 and 40, respectively. Movement restraint section 110 functions to restrain movement of bridge bus bars 30 and 40 in a direction along surface 101. Positioning protrusions 108 and 109 and movement restraint section 110 will be described later. Bridge bus bar 30 is connected to connection sections 201-203, and bridge bus bar 40 is connected to connection sections 204-206.

[0013] The main body 10 has a bracket 111 and an electrode lead housing 112, and the electrode lead housing 112 accommodates lead terminals of the built-in bus bar 20, which will be described later.

[0014] 2. Built-in busbar (first busbar) <Busbar configuration> 2 to 4, the built-in busbar 20 is made of a conductive material such as metal, and is built into and fixed in the main body 10. As will be described in detail below, the built-in busbar 20 is made up of multiple busbars. One busbar included in the built-in busbar 20 is connected to at least one electronic component, and another busbar is connected to another electronic component. Furthermore, another busbar included in the built-in busbar 20 is connected to at least one electronic component and a connection portion of the bridge busbar 30 or 40.

[0015] Hereinafter, a sensor 50 will be exemplified as an electronic component, and the sensor 50 will have an output terminal 501 (indicated by O), a ground terminal 502 (indicated by G), and a power supply terminal 503 (indicated by P). Furthermore, five sensors 50(1) to 50(5) will be connected to the built-in bus bar 20 as shown in FIG.

[0016] In FIG. 2, the built-in busbar 20 has sensor electrode portions S1 to S5, to which sensors 50(1) to 50(5) are connected, respectively. The terminal arrangement of the output terminal 501, ground terminal 502, and power terminal 503 of sensor 50 is the same. In sensor electrode portion S1, the output terminal 501 of sensor 50(1) is connected to output connection point 210(1), the ground terminal 502 is connected to ground connection point 211(1), and the power terminal 503 is connected to power connection point 212(1). The same connections are made for sensor electrode portions S2 to S5 below. Putting it collectively, in sensor electrode portion Sx (x is an integer from 1 to 5), the output terminal 501 of sensor 50(x) is connected to output connection point 210(x), the ground terminal 502 is connected to ground connection point 211(x), and the power terminal 503 is connected to power connection point 212(x).

[0017] Output connection points 210(1) to 210(5) of sensor electrode portions S1 to S5 are connected to output lead terminals 225 to 229 through individual bus bars 220 to 224. Therefore, the output signals of each pressure sensor can be taken out from output lead terminals 225 to 229, respectively.

[0018] Ground connection point 211(1) of sensor electrode S1 is connected to ground connection point 211(5) of sensor electrode S5 through bus bar 230, and bus bar 230 is connected to connection portion 203. Power connection point 212(1) of sensor electrode S1 is connected to power connection points 212(4) and 212(5) of sensor electrode S4 and S5 through bus bar 240, and bus bar 240 is connected to connection portion 206.

[0019] Ground connection point 211(2) of sensor electrode portion S2 is connected to ground connection point 211(3) of sensor electrode portion S3 through bus bar 232, and bus bar 232 is connected to connection portion 201. Power supply connection point 212(2) of sensor electrode portion S2 is connected to connection portion 205 through bus bar 241.

[0020] The ground connection point 211(4) of the sensor electrode portion S4 is connected to the ground lead terminal 235 through the bus bar 231, and the bus bar 231 is connected to the connection portion 202.

[0021] As described above, connection portion 201 is connected to ground connection points 211(2) and 211(3) of sensor electrode portions S2 and S3, connection portion 202 is connected to ground connection point 211(4) of sensor electrode portion S4 and is also connected to ground lead terminal 235, and connection portion 203 is connected to ground connection points 211(1) and 211(5) of sensor electrode portions S1 and S5. In other words, connection portions 201 to 203 are common ground connections.

[0022] On the other hand, connection portion 204 is connected to power supply connection point 212(3) of sensor electrode portion S3 and is also connected to power supply lead terminal 245, connection portion 205 is connected to power supply connection point 212(2) of sensor electrode portion S2, and connection portion 206 is connected to power supply connection points 212(1), 212(4), and 212(5) of sensor electrodes S1, S4, and S5. In other words, connection portions 204 to 206 are common power supply connections.

[0023] 1 and 4, by connecting bridge bus bar 30 to connection portions 201 to 203, the ground connection points of all sensor electrode portions can be connected to ground lead terminal 235. Furthermore, by connecting bridge bus bar 40 to connection portions 204 to 206, the power connection points of all sensor electrode portions can be connected to power lead terminal 245. However, the number and arrangement of the common ground and common power connection portions can be determined in the most rational manner taking into account the number and arrangement of sensors and the electrode configuration of each sensor, and are not limited to the above number and arrangement.

[0024] <Connection configuration> FIG. 2 shows an example of the shape of the connection portion 205. The connection portion 205 has a first base portion 205a and a second base portion 205b that protrudes from the center of the first base portion 205a. As will be described later, the first base portion 205a is surrounded by the insulating material of the main body portion 10, and its upper surface in the Z-axis direction is exposed on the surface 101 of the main body portion 10. The second base portion 205b protrudes from the surface of the first base portion 205a in the Z-axis direction. Therefore, the connection surface that intersects with the protruding direction of the second base portion 205b (the Z-axis direction) is located at a position that protrudes from the surface 101 of the main body portion 10. As will be described later, the protruding connection surface of the second base portion 205b is joined to the connection portions of the bridge bus bars 30 and 40. Note that, although the connection portion 205 in FIG. 2 is rectangular, this is not limiting.

[0025] As shown in FIG. 4, connection portions 201 to 206 basically have the same configuration as connection portion 205 described above. That is, each connection portion has the first base portion described above and a second base portion that protrudes in the Z-axis direction from the first base portion. Hereinafter, the first base portion of each connection portion will be referred to by adding "a" to the reference number, and the second base portion will be referred to by adding "b" to the reference number. Specifically, connection portion 201 is composed of first base portion 201a and second base portion 201b, connection portion 202 is composed of first base portion 202a and second base portion 202b, and so on.

[0026] 3. Bridge bus bar (second bus bar) In this embodiment, the bridge bus bar (second bus bar) has multiple second connection portions and at least one extension portion, and the number and arrangement of the multiple second connection portions correspond to the number and arrangement of the connection portions of the embedded bus bar 20 exposed on the surface 101 of the main body portion 10, respectively.

[0027] 4 and 5, the bridge bus bar 30 in this embodiment has second connection portions 301 to 303. The shapes and arrangement of the extension portions 310, 311, and 313 and the curved portion 312 are designed so that the second connection portions 301 to 303 are positioned to join the connection portions 201, 202, and 203 of the built-in bus bar 20, respectively. As an example, the extension portion 310 and the extension portion 311, which extend in the X-axis direction, are connected via the curved portion 312 for position adjustment in the Y-axis direction. The tip protrusion 320 of the extension portion 310 protrudes in the X-axis direction, and the second connection portion 301 is provided at the tip portion that is away from the tip protrusion 320 in the positive direction of the X-axis.

[0028] Further, extension portion 313 is connected in parallel to extension portion 311 extending in the X-axis direction, and through-hole 314 is formed between extension portion 311 and extension portion 313. In this embodiment, through-hole 314 has a rectangular shape with its longitudinal direction in the X-axis direction, but is not limited to this. Furthermore, through-hole 314 has a shape similar to the planar shape of positioning protrusion 108 provided on surface 101 of main body 10. However, any shape may be used as long as it has a positioning function, and the longitudinal direction of the rectangle is not limited to the X-axis direction. This will be described in more detail later (see FIGS. 7 to 10).

[0029] Furthermore, second connection portion 302 and tip protrusion 321 are provided in the negative direction of the Y axis at the portion of extension portion 311 connected to curved portion 312. Second connection portion 303 is provided at the end of extension portion 311 opposite curved portion 312, and tip protrusions 322 and 323 are provided in the Y axis direction from second connection portion 303.

[0030] The bridging bus bar 30 is positioned by passing the positioning protrusions 108 on the surface 101 through the through holes 314, and further, the movement of the tip protrusions 320 in a direction along the surface 101 is prevented by the movement suppressing portions 110 on the surface 101. By being positioned in this manner, the second connection portions 301-303 of the bridging bus bar 30 can overlap with the connection portions 201-203 of the embedded bus bar 20 exposed on the surface 101, respectively, and the second connection portions 301-303 can be appropriately joined to the connection portions 201-203 by joining means such as welding without misalignment. More specifically, the second connection portions 301-303 of the bridging bus bar 30 overlap and are joined to the protruding second base portions 201b, 202b, and 203b of the connection portions 201-203, respectively.

[0031] The bridge bus bar 40 in this embodiment has second connection portions 401 to 403. The shapes and arrangement of extension portions 410 to 413 are designed so that the second connection portions 401 to 403 are positioned to join the connection portions 204, 205, and 206 of the built-in bus bar 20, respectively. As an example, extension portion 410 and extension portion 411, which extend in the negative direction of the X-axis direction, are connected via extension portion 412 for position adjustment in the Y-axis direction. A tip protrusion 420 of extension portion 410 protrudes in the X-axis direction, and a second connection portion 401 is provided at a tip portion separated from tip protrusion 420 in the positive direction of the X-axis direction. A tip protrusion 421 of extension portion 411 protrudes in the negative direction of the Y-axis direction, and a second connection portion 402 is provided at an end separated from tip protrusion 421 in the positive direction of the Y-axis direction.

[0032] Further, extension portion 414 is connected in parallel to extension portion 412 extending in the Y-axis direction, and through-hole 415 is formed between extension portion 412 and extension portion 414. In this embodiment, through-hole 415 has a rectangular shape with its longitudinal direction in the Y-axis direction, but is not limited to this. Furthermore, through-hole 415 has a shape similar to the planar shape of positioning protrusion 109 provided on surface 101 of main body 10. However, any shape may be used as long as it has a positioning function, and the longitudinal direction of the rectangle is not limited to the Y-axis direction. This will be described in more detail later (see FIGS. 7 to 10).

[0033] In addition, an extension portion 413 extending in the positive direction of the X-axis direction is connected to the portion of extension portion 412 extending in the Y-axis direction, and a tip protrusion 422 of extension portion 413 protrudes in the X-axis direction, and a second connection portion 403 is provided at the tip away from tip protrusion 422 in the negative direction of the X-axis direction.

[0034] The bridging bus bar 40 is positioned by passing the positioning protrusions 109 on the surface 101 through the through holes 415, and furthermore, the movement of the tip protrusions 421 in the direction along the surface 101 is prevented by the movement preventing portions 110 on the surface 101. As a result, the second connecting portions 401 to 403 of the bridging bus bar 40 are respectively joined to the connecting portions 204 to 206 of the embedded bus bar 20 exposed on the surface 101. More specifically, the second connecting portions 401 to 403 overlap and are joined to the protruding second base portions 204b, 205b, and 206b of the connecting portions 204 to 205, respectively.

[0035] <Connection structure> 2, the connection portions 201 to 206 exposed on the surface 101 of the main body 10 have first base portions 201a to 206a and second base portions 201b to 206b that protrude from the centers of the first base portions 201a to 206a, respectively. Below, with reference to FIG. 6, a description will be given of the connection structure between the second connection portions of the bridging bus bars 30 and 40 and the connection portion of the embedded bus bar 20 exposed on the surface 101. Note that, although the connection structure between the connection portion 202 and the second connection portion 302 will be described as an example, the other connection portions have a similar structure.

[0036] 6, the connection portion 202 exposed on the surface 101 of the main body 10 has, as described above, a first base portion 202a and a second base portion 202b that protrudes from the center of the first base portion 202a. When the second connection portion 302 of the bridge bus bar 30 is placed on the connection portion 202 in the Z-axis direction, the second connection portion 302 and the protruding second base portion 202b of the connection portion 202 are tightly joined together.

[0037] 7, as already described, the main body 10 is made of an insulating material such as resin, and the bus bars 220 and 231 of the built-in bus bar 20 are incorporated into the main body 10 by, for example, insert molding. The first base 202a of the connection portion 202 of the built-in bus bar 20 is exposed on the surface 101 of the main body 10, and is molded so that the upper surface of the first base 202a is flush with the surface 101. Therefore, the second base 202b protrudes from the surface 101 by a height d, and the connection surface of the second base 202b, which is a surface that intersects with the Z-axis direction, is located higher than the surface 101 by the height d. The protruding second base 202b may be formed by any method. For example, the protruding portion that becomes the second base 202b can be formed by pressing (by pressing, for example) the center of a metal plate with a thickness D1 that becomes the first base 202a.

[0038] When the second connection portion 302 of the bridge bus bar 30 is placed on the connection portion 202 of the built-in bus bar 20, the second connection portion 302 abuts on the upper surface of the second base portion 202b, and laser welding can be performed in this state to tightly join the connection portion 202 and the second connection portion 302. At this time, because the second base portion 202b protrudes from the surface 101, it is possible to prevent resin from entering the joint between the second base portion 202b and the second connection portion 302 during insert molding of the main body 10. This prevents the resin from getting into the welded portion, which could reduce the strength and make the welded portion unstable, and improves the reliability of the mechanical and electrical connection.

[0039] 7, it is desirable that the thickness D1 of the first base portion 202a of the connection portion 202 of the built-in bus bar 20 is thicker than the thickness D2 of the second connection portion 302 of the bridge bus bar 30. This makes it possible to avoid any influence on the connection portion 202 of the built-in bus bar 20, which is the lower bus bar, during laser welding.

[0040] Furthermore, the second base portion 202b has a connection surface, which is a surface that intersects with the Z-axis direction, located at a height d higher than the front surface 101, and this protruding connection surface connects to the second connection portion 302 of the bridge bus bar 20. This surface connection has the advantage of greater connection strength and lower electrical resistance than a point connection. In particular, according to this embodiment, the protruding connection surface of the second base portion 202b and the second connection portion 302 of the bridge bus bar 20 are closely joined over the surface, thereby improving connection strength and electrical connectivity.

[0041] 4. Positioning mechanism As described above, bridge bus bars 30 and 40 are positioned by passing through holes 314 and 415, respectively, through positioning protrusions 108 and 109 on surface 101. This positioning mechanism will be described with reference to FIGS.

[0042] In Figure 8, bridge bus bar 30 is positioned by passing through hole 314 into positioning protrusion 108, and bridge bus bar 40 is positioned by passing through hole 415 into positioning protrusion 109. Positioning mechanism M1 shown in the enlarged view of Figure 8 exemplifies the positioning mechanism for bridge bus bar 40, and has a shape in which through hole 415 and positioning protrusion 109 extend in the Y-axis direction. Below, the positioning mechanism M1 for the bridge bus bar will be comprehensively described with reference to Figure 9.

[0043] 9, in order to comprehensively illustrate the positioning mechanism M1, the surface 101 of the main body 10 is defined as the XY plane, and the direction perpendicular to the XY plane is defined as the Z-axis direction. Therefore, the Z-axis direction represents the height direction, and the orientation in the XY plane does not matter.

[0044] The positioning mechanism M1 has a positioning protrusion 600 and a bridge bus bar 700. The positioning protrusion 600 corresponds to the positioning protrusion 108 or 109 in Fig. 1, but is not limited to these shapes. The positioning protrusion 600 has a shape that protrudes in the Z-axis direction from the surface 101, and is preferably formed during insert molding using the same insulating material (resin) as the main body 10.

[0045] The positioning protrusion 600 has at least a pair of flat outer walls 601 and 602 and a pair of outer walls 603 and 604. The outer walls 601 and 602 face each other, are preferably parallel, and function to position the bridge bus bar 700, as described below. The shape of the positioning protrusion 600 projected onto the XY plane is an elongated shape with the outer walls 601 and 602 as the longitudinal direction. The pair of outer walls 603 and 604 also face each other, but do not need to be flat. As an example, the shape of the positioning protrusion 600 projected onto the XY plane is a rectangle with the outer walls 601 and 602 as the longitudinal direction and the outer walls 603 and 604 as the lateral direction.

[0046] The outer walls 601 and 602 and the outer walls 603 and 604 may be formed upright in the Z-axis direction, or may be formed so as to incline toward the opposing outer wall as their height increases to facilitate insertion through the through hole H of the bridge bus bar 700. In other words, the positioning protrusion 600 may be formed so that the cross-sectional shape of a plane perpendicular to the outer walls 601 and 602 is trapezoidal. Furthermore, the outer wall 605 at the top of the positioning protrusion 600 and the ridges of the outer walls 601 to 604 may be curved. If the outer walls 603 and 604 are also flat, they may be formed so that the cross-sectional shape of a plane perpendicular to the outer walls 603 and 604 is trapezoidal.

[0047] There are no limitations on the shapes of the outer wall 605 at the top of the positioning protrusion 600 and the outer walls 603 and 604. In particular, the shapes of the outer walls 603 and 604 projected onto the XY plane may be triangular, flat, or curved.

[0048] The bridge bus bar 700 has a through hole H, which corresponds to the through hole 314 or 415 in FIGS. 4 and 5, but is not limited to these shapes. The through hole H has a pair of flat inner wall surfaces 701 and 702. These inner wall surfaces 701 and 702 face each other, are preferably formed parallel to each other, and have a shape and dimensions that follow the outer walls 601 and 602 of the positioning protrusion 600, respectively. The bridge bus bar 700 is positioned when the inner wall surfaces 701 and 702 of the through hole H penetrate the positioning protrusion 600 while following the outer walls 601 and 602 of the positioning protrusion 600, respectively.

[0049] The shape of the other inner wall surfaces 703 and 704 of the through hole H is not limited, but is desirably a shape that follows the shape of the outer walls 603 and 604 of the positioning protrusion 600. Therefore, the shape of the through hole H and the shape of the positioning protrusion 600 projected onto the XY plane are similar. In other words, the inner wall surfaces 701 to 704 of the through hole H are formed to follow the outer walls 601 to 604 of the positioning protrusion 600, respectively. This allows the bridge bus bar 700 to be positioned by passing the through hole H of the bridge bus bar 700 through the positioning protrusion 600.

[0050] The positioning mechanism of through hole H and positioning protrusion 600 of bridge bus bar 700 described above is applied to through hole 314 and positioning protrusion 108 of bridge bus bar 30 and through hole 415 and positioning protrusion 109 of bridge bus bar 40.

[0051] Below, the bridge bus bar 40 is taken as an example of the bridge bus bar 700, and a case will be described in which the positioning protrusion 109 penetrates the through hole 415 of the bridge bus bar 40 to be positioned. The shape of the positioning protrusion 109 projected onto the XY plane is assumed to be a rectangle with the outer walls 601 and 602 as the longer sides, as shown in FIG. 8. Therefore, the bridge bus bar 40 is positioned with the inner wall surfaces 701 and 702 of the through hole 415 aligned with the outer walls 601 and 602 of the positioning protrusion 109, respectively. A cross-sectional view taken along line AA in FIG. 8 is shown in FIG. 10, and a cross-sectional view taken along line BB in FIG. 11.

[0052] 10 and 11 , the main body 10 is made of an insulating material such as resin, and the bus bars 220 and 231 of the built-in bus bar 20 are incorporated therein by, for example, insert molding. The through hole 415 of the bridge bus bar 40 passes through the positioning protrusion 109 formed on the surface 101 of the main body 10, thereby positioning the bridge bus bar 40. In this way, the inner wall surfaces 701 and 702 of the through hole 415 of the bridge bus bar 40 are placed along the outer walls 601 and 602 of the positioning protrusion 109, respectively, making it easy to position the bridge bus bar 40. Similarly, the inner wall surfaces 701 and 702 of the through hole 314 are placed along the outer walls 601 and 602 of the positioning protrusion 108, making it easy to position the bridge bus bar 30.

[0053] In this embodiment, the through-hole 415 (314) of the bridge bus bar 40 (30) and the positioning protrusion 109 (108) formed on the surface 101 of the main body 10 are rectangular. The through-hole 415 (314) of the bridge bus bar 40 (30) and the positioning protrusion 109 (108) have a long side, which enables positioning even at a long side location away from the center of the positioning protrusion 109 (108) (for example, near the intersection of the long side and the short side). Because positioning is possible even at a location away from the center of the positioning protrusion 109 (108), the amount of movement of the bridge bus bar 40 (30) in the direction along the surface 101 can be suppressed by using the center of the through-hole 415 (314) as the center of rotation.

[0054] In addition, in bridge bus bars 30 and 40, the positions of through holes 314 and 415 on the bridge bus bar are determined depending on the number and layout of openings 103 to 106 and connection portions 201 to 206 arranged on surface 101 of main body portion 10.

[0055] 5. Movement prevention mechanism The bridge bus bars 30 and 40 positioned by the above-described positioning mechanism M1 are prevented from moving in a direction along the surface 101 by movement prevention portions 110 provided on the surface 101. The movement prevention mechanism M2 will be described below with reference to FIGS. 8 and 12 to 15.

[0056] In Figure 8, the movement suppression mechanism M2 has a movement suppression portion 110 and the tip protrusions of each bridge bus bar. The movement suppression portion 110 has a substantially rectangular suppression portion main body 120 that protrudes from the surface 101. It is desirable that the height of the suppression portion main body 120 in the Z-axis direction be greater than the sum of the thickness d of the second base portion 202b and the thickness D2 (see Figure 7) of the connection portion 302 of the bridge bus bars 30 and 40 (d + D2). The suppression portion main body 120 has a recess 121 along the X-axis direction and a recess 122 along the Y-axis direction. When viewed from the Z-axis direction, the recess 121 has a U-shape that opens in the positive direction of the X-axis, and the recess 122 has a U-shape that opens in the positive direction of the Y-axis.

[0057] As described above, the bridge bus bar 30 positioned by the positioning protrusions 108 has its tip protrusions 320 fitted into the recesses 121 of the restraining unit main body 120. In this way, the tip protrusions 320 of the bridge bus bar 30 are sandwiched between the recesses 121 on both sides in the direction of the surface 101, and movement in the direction along the surface 101 is restrained. Similarly, the bridge bus bar 40 positioned by the positioning protrusions 109 has its tip protrusions 421 fitted into the recesses 122 of the restraining unit main body 120. In this way, the tip protrusions 421 of the bridge bus bar 40 are sandwiched between the recesses 122 on both sides in the direction of the surface 101, and movement in the direction along the surface 101 is restrained. A cross-sectional view taken along line CC in FIG. 8 is shown in FIG. 12, and a cross-sectional view taken along line DD is shown in FIG. 13.

[0058] 12 and 13 , main body 10 is made of an insulating material such as resin, and first base portion 201a of connection portion 201 of built-in bus bar 20, bus bar 232, etc. are incorporated therein by, for example, insert molding. Tip protrusion 320 of bridging bus bar 30 is sandwiched between recessed portion 121 of restraining portion main body 120, and movement along surface 101 is inhibited. Similarly, tip protrusion 421 of bridging bus bar 40 is sandwiched between recessed portion 122 of restraining portion main body 120, and movement along surface 101 is inhibited.

[0059] 14 , the bridge bus bar 30 is positioned by simply aligning the positioning protrusions 108 on the surface 101 with the through holes 314 and passing them through. As a result, the connection portions 301 to 303 of the bridge bus bar 30 overlap the connection portions 201 to 203 exposed on the surface 101, respectively, and the tip protrusion 320 fits into the recess 121 of the restraining portion main body 120 of the movement restraining portion 110. In this embodiment, in the bridge bus bar 30 positioned by the positioning protrusions 108, the tip protrusion among the tip protrusions 320 to 323 that is farthest in linear distance from the center of the positioned through hole 314 fits into the recess 121 of the restraining portion main body 120 of the movement restraining portion 110. By having the tip protrusion that is farthest in linear distance from the center of the through hole 314 fit into the recess 121 of the movement restraining portion 110, the overall movement of the bridge bus bar 30 in the direction along the surface 101 can be restricted around the center of the through hole 314 as a rotation center.

[0060] In this case, the distance 801 between the tip protrusion 320 and the center of the through hole 314 is the greatest compared to the other tip protrusions 321 to 323, so the recess 121 of the restraining unit main body 120 is disposed at a position that restrains the movement of the tip protrusion 320. If the shape of the bridge bus bar 30 is different, the tip protrusion that has the greatest distance 801 from the center of the through hole 314 may be selected as the movement restraining point. Furthermore, the number of tip protrusions that are restrained from moving does not have to be one. Multiple tip protrusions may be restrained from moving as necessary. For example, if there are multiple tip protrusions that are farthest from the through hole 314, each of them may be restrained from moving by a movement restraining unit.

[0061] 15 , the bridge bus bar 40 is positioned by simply aligning the through-hole 415 with the positioning protrusion 109 on the surface 101 and passing the through-hole 415 through. As a result, the connection portions 401 to 403 of the bridge bus bar 40 overlap the connection portions 204 to 206 exposed on the surface 101, respectively, and the tip protrusion 421 fits into the recess 122 of the restraining portion main body 120 of the movement restraining portion 110. In this embodiment, in the bridge bus bar 40 positioned by the positioning protrusion 109, the tip protrusion among the tip protrusions 420 to 422 that is furthest in linear distance from the center of the positioned through-hole 415 fits into the recess 122 of the restraining portion main body 120 of the movement restraining portion 110. By having the tip protrusion that is furthest in linear distance from the center of the through-hole 415 fit into the recess 122 of the movement restraining portion 110, the overall movement of the bridge bus bar 40 in the direction along the surface 101 can be restricted around the center of the through-hole 415 as a rotation center.

[0062] In this case, distance 802 between tip protrusion 421 and the center of through hole 415 is the greatest compared to other tip protrusions 420 and 422, so recess 122 of restraining unit main body 120 is disposed at a position that restrains movement of tip protrusion 421. If the shape of bridge bus bar 40 is different, the tip protrusion that has the greatest distance 802 from the center of through hole 415 may be selected as the restraining point. Furthermore, if there are multiple tip protrusions that are the farthest from through hole 415, each of them may be restrained from moving by a movement restraining unit.

[0063] 6. Sensor Module As shown in FIG. 16, the bridge bus bars 30 and 40 are positioned and arranged as described above, and each connection is joined by laser welding or the like. As a result, the connection portions 201 to 203 exposed on the surface 101 of the main body 10 are commonly connected to ground by the bridge bus bar 30, and the connection portions 204 to 206 are commonly connected to power by the bridge bus bar 40. In the case of a sensor module having sensors 50(1) to 50(5) as electronic components, the sensors 50(1) to 50(5) are connected to their respective sensor electrode portions S1 to S5 from below the bus bar module 1, as shown in FIGS. 2 and 3. This electrode connection can be easily performed through the openings 103 to 107. Finally, as shown in FIG. 17, the protective cover 11 is fixed inside the peripheral wall 102 of the main body 10, thereby completing the sensor module.

[0064] The bus bar module 1 according to this embodiment can also be applied to a pressure sensor module. When the above-described sensors 50(1) to 50(5) are pressure sensors, a sensor module including the pressure sensors 50(1) to 50(5) can measure the pressure of oil in a hydraulic control device mounted on a vehicle such as an automobile.

[0065] 2 and 3, in the case of a pressure sensor module, all pressure sensors can be operated by connecting the grounding lead terminal 235 and the power supply lead terminal 245 to a power supply, and the measurement output of each pressure sensor can be taken out from the output lead terminals 225 to 229. Therefore, by employing the bus bar module 1 according to this embodiment, it is possible to drive a sensor module consisting of N (N is an integer of 2 or more) pressure sensors with a small number of lead terminals (N+2).

[0066] Furthermore, in such a sensor module, the drive currents of all the sensors flow through the power supply lead terminal 245 and the ground lead terminal 235, and therefore, if the adhesion of the bus bar connection deteriorates due to the infiltration of resin or the like, and the resistance increases, heat generation or the like may occur. The bus bar structure 1 according to the present embodiment described above can prevent insufficient welding strength and heat generation due to insufficient adhesion. [Industrial Applicability]

[0067] The present invention can be applied to a busbar connection portion of a busbar module. [Explanation of symbols]

[0068] 1 Busbar Module 10 Main body 101 Surface 102 Peripheral wall section 103~107 Opening 108, 109 Positioning protrusions 110 Movement prevention part 111 Bracket 112 Electrode lead housing 120 Deterrent unit body 121, 122 recess 20 Built-in busbar (first busbar) 201~206 Connection 205a 1st base 205b 2nd base (projection) 210 Output Connection Point 211 Ground connection point 212 Power connection point 220~224 busbar 225~229 Output lead terminals 230~232 busbar 235 Grounding lead terminal 240~242 busbar 245 Power supply lead terminal S1~S5 Sensor electrode part 30 Bridge bus bar (second bus bar) 301~303 Second connection part 310, 311, 313 extension section 312 Curved section 314 Through hole 320~323 Tip protrusion 40 Bridge bus bar (second bus bar) 401~403 Second connection part 410~414 Stretching part 415 Through hole 420~422 Tip protrusion 50 Pressure sensor (electronic component) 501 output terminal 502 Ground terminal 503 Power terminal 600 Positioning protrusion 601~605 Exterior wall 700 Bridge Busbar 701~704 Inner wall surface H through hole M1 positioning mechanism M2 movement restraint mechanism

Claims

1. A busbar module for connecting to an electronic component, a main body; a first bus bar incorporated in the main body and connected to the electronic component; a second bus bar disposed on a surface of the body portion and having at least one extension portion; and the main body portion has an electronic component accommodating portion that accommodates the electronic component, The second bus bar is The extension portion has a through hole, The through hole is The inner wall surface is flat and the inner wall surface is opposed to each other. The main body portion is a positioning protrusion on the surface of the main body, the positioning protrusion having an outer wall whose cross section parallel to the surface is similar in shape to the through hole or that follows the inner wall surface of the through hole; The positioning protrusion is By passing through the through hole, the second bus bar is positioned on the surface of the body portion; The positioned second bus bar is A bus bar module, characterized in that it is connected to the first bus bar exposed on the surface of the main body portion.

2. The main body portion is 2. The bus bar module according to claim 1, wherein the surface of the main body portion has a movement restraining portion that restrains movement of at least one end of the second bus bar along the surface.

3. The bus bar module according to claim 2 , wherein the movement restricting portion restricts movement of at least the end of the second bus bar farthest from the through hole.

4. 4. The bus bar module according to claim 1, wherein the positioning protrusion has a rectangular shape with long and short sides.

5. The first bus bar a connection portion exposed on the surface of the main body portion; The connection portion is a first base portion surrounded by the main body portion and a second base portion protruding from the first base portion, The second bus bar connect to the second base of the connecting portion; 5. The bus bar module according to claim 1, wherein the bus bar module is a conductor.

6. The second base portion is a connection surface that is connected to the second bus bar and that is located on a surface that intersects with a direction in which the second base portion protrudes from the first base portion; The connection surface is The busbar module according to claim 5 , wherein the second base portion is located in a direction in which the second base portion protrudes from the first base portion relative to the surface of the main body portion.

7. 7. The bus bar module according to claim 5, wherein the second base portion of the first bus bar and the second bus bar are connected by welding.

8. The electronic components are at least two or more, The first bus bar is a first bus bar connected to one of the at least one electronic component; and another first bus bar connected to the other of the at least one electronic component, The second bus bar is 8. The bus bar module according to claim 5, wherein the first bus bar and the other first bus bar are connected to the second base portion of each of the first bus bars.

9. 9. The bus bar module according to claim 1, wherein the electronic component is a sensor.

10. The busbar module according to claim 9, wherein the sensor is a pressure sensor.

11. A sensor module comprising the bus bar module according to any one of claims 1 to 8.

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