Wiring structure for electrical device

Abstract

The invention provides a wiring structure of electrical equipment, which can stabilize the extension amount of a bus bar from a control substrate. A wiring structure for an electrical device is provided with: connectors (4, 4a, 4b) that are fixed to a housing (2) and have outer connector housings (4a2, 4b2) and inner connector housings (4a1, 4b1); bus bars (7), one side of which is disposed in the outer connector housings (4a2, 4b2) of the connectors (4a, 4b), and the other side of which extends toward the outside of the inner connector housings (4a1, 4b1) of the connectors (4a, 4b); and a control board (3) through which the other side of the bus bar (7) is inserted, the wiring structure of the electrical device is provided with a gasket (6) which is inserted between the outer peripheral part (4c) of the connector (4) and the inner peripheral part (2a) of the housing (2) facing the outer peripheral part (4c) of the connector (4), and seals the gap between the connector (4) and the housing (2).

Description

Technical Field

[0001] The present application relates to a wiring structure of an electrical device. Background Art

[0002] The existing connector prevents water from entering the internal storage space that accommodates the ferrite core by providing a sealing member, thereby preventing water from adhering to the terminal. The bus bar is pressed into and fixed to the inner housing, and a through hole for the bus bar is provided in the ferrite core, so that the bus bar is inserted into the through hole. The locking portion of the inner housing is received in the locking hole of the outer housing, so that the inner housing and the outer housing are assembled together. In addition, the sealing member is arranged between the outer housing and the inner housing, and can be sealed in the axial direction and the surface direction, so that water can be prevented from entering from the outside of the housing. (See Patent Document 1) Prior art literature Patent Literature

[0003] Patent Document 1: Japanese Patent Application Publication No. 2020-113478 Summary of the invention Technical problem to be solved by the invention

[0004] The wiring structure of the electrical equipment described in the above-mentioned existing patent document 1 is to waterproof the separate structures by sealing the connector in the axial and surface directions. However, due to the sealing in the surface direction, the busbar support portion of the inner shell is subjected to a reaction force generated by the compression of the sealing component in the surface direction. Therefore, there is a problem that the position accuracy of the busbar is unstable.

[0005] In addition, the busbar of the connector is connected to the control substrate inside the housing of the wiring structure of the electrical device through soldering. As in the wiring structure of the electrical device described in Patent Document 1, i.e., the existing sealing structure of the connector, when the connector is subjected to a reaction force generated by the compression of the sealing member in the surface direction, when the busbar of the connector is inserted into the through hole of the control substrate and soldered, the connector is pushed open at the surface sealing portion between the frame and the connector under the reaction force of the surface seal, making the extension amount of the busbar of the connector from the through hole of the control substrate unstable, thereby causing the problem of affecting the soldering connectivity.

[0006] It is necessary to consider the bus bar extending in the direction in which the reaction force of the surface seal is generated and stabilize the protrusion amount of the bus bar from the through hole of the control substrate to solve the problem of deterioration of soldering connection.

[0007] The present application discloses a technology for solving the above-mentioned problem, and its object is to provide a wiring structure of an electric device capable of stabilizing the protrusion amount of a bus bar from a control substrate. Technical solutions adopted to solve technical problems

[0008] The wiring structure of the electrical equipment disclosed in the present application comprises: a connector, which is fixed to a frame and has a connector shell, wherein the connector shell is composed of an outer connector shell and an inner connector shell; a bus bar, one side of which is arranged on the outer connector shell of the connector, and the other side of the bus bar extends toward the outside of the inner connector shell of the connector; and a control substrate, which is retained in the frame and has the other side of the bus bar inserted therethrough, wherein the wiring structure of the electrical equipment includes a gasket, which is inserted between the outer periphery of the connector and the inner periphery of the frame opposite to the outer periphery of the connector to seal the gap between the connector and the frame. Effects of the Invention

[0009] According to the wiring structure of the electric device disclosed in the present application, a gasket is inserted between the outer periphery of the connector and the inner periphery of the frame facing the outer periphery of the connector to seal the gap between the connector and the frame, thereby stabilizing the protrusion amount of the bus bar from the control substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a perspective view showing the wiring structure of the electric device according to the first embodiment. Figure 2 The wiring structure of the electrical equipment according to the first embodiment is shown in FIG. Figure 1 A three-dimensional diagram of the state observed from the back side. Figure 3 This is a front view showing the wiring structure of the electric device according to the first embodiment. Figure 4 The wiring structure of the electric device according to the first embodiment Figure 3 Cross-sectional view at line AA. Figure 5 This is a front view of a connector showing the wiring structure of the electric device according to the first embodiment. Figure 6 The wiring structure of the electrical equipment of the second embodiment is equivalent to Figure 3 Cross-sectional view at line AA. Figure 7 The wiring structure of the electrical equipment according to the second embodiment Figure 6 Magnified view of part B. Figure 8 It is a front view showing the wiring structure of the electric device according to the third embodiment. Fig. 9 The wiring structure of the electrical equipment according to the third embodiment Figure 8 Cross-sectional view at line CC. Fig.10 The wiring structure of the electrical equipment according to the third embodiment Fig. 9 Magnified view of part D. DETAILED DESCRIPTION

[0011] Implementation Method 1 The following is based on Figures 1 to 5 , implementation mode 1 of the present application is described. In each figure, the same or corresponding components and parts are marked with the same symbols for description. Figure 1 It is a perspective view showing the wiring structure of the electric device according to the first embodiment. Figure 2 The wiring structure of the electrical equipment according to the first embodiment is shown in FIG. Figure 1 A three-dimensional diagram of the state observed from the back side. Figure 3 This is a front view showing the wiring structure of the electric device according to the first embodiment. Figure 4 The wiring structure of the electric device according to the first embodiment Figure 3 Cross-sectional view at line AA. Figure 5 This is a front view of a connector showing the wiring structure of the electric device according to the first embodiment.

[0012] The wiring structure of the electrical device of the first embodiment is a structure that sends and receives signals to and from the outside and uses the signals to control power, and is characterized in that the frame and the connector are waterproofed by a shaft seal. As an example of the wiring structure of the electrical device, the following devices can be cited, such as a power conversion device that requires a waterproof structure and is controlled to a desired power by a control substrate inside the structure.

[0013] Conventional connectors are waterproofed by performing surface sealing and shaft sealing on the gap between the inner housing and the outer housing. Since the surface sealing is also used for sealing, a reaction force of the sealing member is generated in the direction in which the busbar extends, and the position of the busbar in the direction in which the busbar extends is unstable.

[0014] The connector installed in the wiring structure of the electric device of the present application is configured to send and receive electric signals using a bus bar, and the bus bar is inserted into a through hole opened on a control substrate inside a housing and connected by soldering, thereby providing an electric contact.

[0015] In a connector for transmitting and receiving electrical signals, thin bus bars are adjacent to each other at short intervals, and it is known that solder bridges are generated between adjacent bus bars depending on the length of the bus bars extending from through holes of a control substrate.

[0016] In the case of a surface sealing structure such as the background art, the connector is pushed open by the reaction force of the gasket, and the front end position of the bus bar is easily offset in the direction of the reaction force, making it difficult to control the length of the bus bar extending from the through hole.

[0017] The structure of the present application is a structure that uses a shaft washer to generate a reaction force in a direction orthogonal to the direction in which the bus bar extends from the through hole, thereby stabilizing the extension length of the bus bar from the through hole and improving soldering connectivity.

[0018] based on Figure 1 to Figure 4 , the wiring structure 1 of the electrical device of the embodiment 1 of the present application is described. The connector 4 is fixed to the frame 2 by screws, and is composed of two connectors 4a and a connector 4b. The connector 4a is composed of an outer connector housing 4a2 and an inner connector housing 4a1. The connector 4b is composed of an outer connector housing 4b2 and an inner connector housing 4b1.

[0019] One side of the bus bar 7 composed of a plurality of components is arranged inside the outer connector housing 4a2 and the inner connector housing 4a1 of the connector 4a, and the other side extends to the outside of the inner connector housing 4a1 of the connector 4a. In addition, one side of the bus bar 7 composed of a plurality of components is arranged inside the outer connector housing 4b2 and the inner connector housing 4b1 of the connector 4b, and the other side extends to the outside of the inner connector housing 4b1 of the connector 4b.

[0020] The control board 3 is held by the housing 2 , and the other sides of the bus bars 7 , 7 extending outward from the inner connector housings 4 a 1 and 4 b 1 of the connector 4 a and 4 b , respectively, are inserted into the through holes of the control board 3 .

[0021] Since the signal connector 4 is easily affected by noise, a ferrite core 5 is often installed. The gasket 6 is inserted between the outer peripheral portion 4c of the connector 4 and the inner peripheral portion 2a of the frame 2 opposite to the outer peripheral portion 4c of the connector 4, and seals the gap between the connector 4 and the frame 2. By positioning the gasket 6 within the range of the axial length of the ferrite core 5, the length of the bus bar 7 can be minimized.

[0022] With the gasket 6 mounted on the connector 4, the connector 4 is fixed to the frame 2 by screws. Next, after the connector 4 is fixed to the frame 2, the control board 3 is fixed to the frame 2 by screws, the bus bar 7 is inserted into the through hole of the control board 3, and the control board 3 and the bus bar 7 are electrically connected by soldering.

[0023] When the connector 4 is installed in the frame 2, it is not easy to generate a reaction force in the direction opposite to the direction of pushing the connector 4 into the frame 2, and a reaction force of the gasket 6 is generated in the direction perpendicular to the installation direction of the connector 4. Therefore, the position accuracy of the front end of the bus bar 7 soldered to the control substrate 3 is stable, so that the soldering connection performance becomes good and the accuracy of the protrusion amount of the bus bar 7 from the control substrate 3 becomes good.

[0024] Figure 4The gasket 6 shown is a shaft seal structure, but the gasket 6 having the shortest bus bar 7 may be a face seal structure. By shortening the length of the bus bar 7, the volume of the conductive material is reduced, thereby having the advantages of lowering the material cost and reducing the resistance.

[0025] Furthermore, the plurality of bus bars 7 disposed on the connector 4 usually form a circuit for current to and fro with the adjacent bus bars 7, and the inductance is proportional to the length of the bus bar 7. Therefore, if the length of the bus bar 7 is shortened as in the present application, the voltage variation becomes smaller when the inductance becomes smaller and noise is superimposed on the bus bar 7, and therefore the error relative to the desired voltage becomes smaller.

[0026] Next, Figure 5 The structure of the connector 4 shown in FIG. 1 is described below. The wiring structure 1 of the electrical equipment often uses a plurality of connectors 4. Figure 5 In the embodiment, two connectors 4a and 4b, which were originally independent components, are molded side by side. By arranging them side by side, the connector 4 becomes larger, and the shaft seal mounting portion is easily collapsed due to the shrinkage of the resin during molding. Therefore, a reinforcement rib 8 is provided in the center of the connector 4 to prevent the resin wall for mounting the gasket 6 from collapsing.

[0027] like Figure 5 As shown, when the ferrite core 5 is installed inside the connector 4, the inner perimeter of the gasket 6 becomes longer and the deformation becomes more significant, so the measure of using the reinforcing rib 8 can effectively play a role. In addition, Figure 5 The ferrite core 5 is not circular, and is provided with a straight portion 5a. Figure 5 In this embodiment, the ferrite core 5 is externally inserted, and the positioning structure 4d is mounted on the connector 4, so that the straight portion 5a of the ferrite core 5 can be used for positioning.

[0028] Furthermore, by applying injection pressure to the ferrite core 5 during resin molding and pushing the mold to the straight portion 5a of the ferrite core 5, the ferrite core 5 can be fixed during molding, and insert molding can be performed. Furthermore, when two or more ferrite cores 5 are mounted on the connector 4, by setting the ferrite cores 5 to the same shape, there is an advantage that the mold cost of the ferrite core 5 can be reduced.

[0029] Furthermore, the connector interface for external connection and the bus bar to be soldered extend straight, but it is also easy to imagine a connector structure in which the bus bar is bent so that the direction of the bus bar to be soldered is different from the direction of the connector interface.

[0030] Implementation Method 2 Next, based on Figure 6 and Figure 7, implementation mode 2 is explained, and in each figure, the same or corresponding components and parts are marked with the same symbols for explanation. Figure 6 The wiring structure of the electrical equipment of the second embodiment is equivalent to Figure 3 Cross-sectional view at line AA. Figure 7 The wiring structure of the electrical equipment according to the second embodiment Figure 6 Magnified view of part B.

[0031] like Figure 7 As shown, the inner peripheral portion 2b of the frame 2 is set to a tapered shape. By setting the inner peripheral portion 2b of the frame 2 to a tapered shape, the connector 4 equipped with the gasket 6 is easily installed on the inner peripheral portion 2b of the frame 2, and the risk of the gasket 6 being broken due to the gasket 6 being sandwiched between the inner peripheral portion 2b of the frame 2 and the outer peripheral portion 4c of the connector 4 is reduced.

[0032] Implementation 3 Next, based on Figure 8 to Figure 10 , implementation mode 3 is explained, and in each figure, the same or corresponding components and parts are marked with the same symbols for explanation. Figure 8 It is a front view showing the wiring structure of the electric device according to the third embodiment. Fig. 9 The wiring structure of the electrical equipment according to the third embodiment Figure 8 Cross-sectional view at line CC. Fig.10 The wiring structure of the electrical equipment according to the third embodiment Fig. 9 Magnified view of part D.

[0033] In the third embodiment, the connector 4 is provided with an elastic engaging body 9, the elastic engaging body 9 having an arm 9a extending toward the outer peripheral side of the frame 2, a claw-shaped engaging piece 9b, for example, is provided at the front end of the arm 9a, and an engaging portion 2c, for example, consisting of a recess, for engaging the engaging piece 9b of the elastic engaging body 9 is provided at the outer peripheral of the frame 2. When the connector 4 is mounted on the frame 2, the arm 9a of the elastic engaging body 9 slides on the outer peripheral of the frame 2 in a bent state, and when reaching the engaging portion 2c consisting of the recess of the frame 2, the engaging piece 9b of the elastic engaging body 9 engages and is fixed to the engaging portion 2c consisting of the recess of the frame 2.

[0034] Fig. 9 , Fig.10The structure is explained for the case where the engaging portion 2c of the frame 2 is a concave portion, but the same effect can be achieved by setting the engaging portion 2c of the frame 2 as a convex portion and providing an engaging hole at the front end of the engaging piece 9b of the elastic engaging body 9 provided on the connector 4, so that the engaging piece 9b of the elastic engaging body 9 constituted by the engaging hole engages with the convex portion of the engaging portion 2c of the frame 2. In addition, if more than one elastic engaging body 9 is provided, the force fixed to the frame 2 can be exerted, so the number of the elastic engaging bodies 9 is not limited.

[0035] In addition, in the portion other than the waterproof portion of the gasket 6, the connector 4 and the frame 2 can be fixed by partially increasing the amount of compression of the gasket 6. Of course, it is also possible to use an elastic body independent of the gasket 6, set a gap between the connector 4 and the frame 2 and fill the gap with the elastic body to fix the frame 2 and the connector 4.

[0036] Although the present application describes various exemplary embodiments and examples, the various features, methods, and functions described in one or more embodiments are not limited to application to specific embodiments, but may be applied to the embodiments alone or in various combinations. Therefore, it is considered that numerous modifications not shown in the examples are also included in the technical scope disclosed in the specification of this application, including, for example, the case where at least one component is modified, added, or omitted, and the case where at least one component is extracted and combined with components of other embodiments. Industrial Applicability

[0037] The present application is suitable for realizing a wiring structure of an electric device capable of stabilizing the protrusion amount of a bus bar from a control substrate. Explanation of symbols

[0038] 1 wiring structure of electric equipment, 2 frame, 2a, 2b inner peripheral part, 3 control substrate, 4, 4a, 4b connector, 4a1, 4b1 inner connector housing, 4a2, 4b2 outer connector housing, 4c outer peripheral part, 4d positioning structure, 5 ferrite core, 5a straight part, 6 washer, 7 bus bar, 8 reinforcing rib, 9 elastic engaging body, 9a arm part, 9b engaging piece.

Claims

1. A wiring structure of an electrical device, comprising: a connector, the connector being fixed to a frame and having a connector housing, the connector housing being composed of an outer connector housing and an inner connector housing; a bus bar, one side of the bus bar being arranged on the outer connector housing of the connector, the other side of the bus bar extending toward the outside of the inner connector housing of the connector; and a control substrate, the control substrate being held in the frame and having the other side of the bus bar inserted therethrough, characterized in that The wiring structure of the electric device includes a gasket inserted between an outer peripheral portion of the connector and an inner peripheral portion of the frame body facing the outer peripheral portion of the connector to seal a gap between the connector and the frame body.

2. The wiring structure of the electrical equipment according to claim 1, characterized in that: The bus bar is surrounded by a ferrite core, and the washer is arranged within the range of the axial length of the ferrite core.

3. The wiring structure of the electrical equipment according to claim 1 or 2, characterized in that: A contact surface of the frame with the gasket forms a tapered shape.

4. The wiring structure of the electrical equipment according to claim 1 or 2, characterized in that: The connector is provided with an elastic engaging body, and the outer periphery of the frame is provided with an engaging portion for engaging an engaging piece of the elastic engaging body.

5. The wiring structure of the electrical equipment according to claim 2, characterized in that: The ferrite core has a straight portion.

6. The wiring structure of the electrical equipment according to claim 2 or 5, characterized in that: A plurality of ferrite cores are provided, and reinforcing ribs are provided between the ferrite cores.

7. The wiring structure of the electrical equipment according to claim 6, characterized in that: The plurality of ferrite cores are composed of ferrite cores of the same shape.

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