Fixing structure for electronic components and on-board charger

Abstract

The present disclosure relates to a fixing structure of an electronic component and a vehicle charger. The fixing structure of the electronic component includes: a fixing part, which is configured to fix the electronic component in a state where the electronic component is pressed against the wall surface of a shell in a pressing direction; and a fastened part, which is arranged at a position away from the wall surface of the shell and the fixing part is fastened and fixed to the fastened part. The fixing part includes: a fixing part, which is fastened and fixed to the fastened part and has a coupling part; and a pressing part, which extends from the fixing part toward the electronic component and presses the electronic component against the wall surface in the pressing direction. The fastened part includes an engaged part, which is engaged with the engaging part and is configured to limit the movement of the fixing part in a direction opposite to the pressing direction.

Description

Technical Field

[0001] The present disclosure relates to a fixing structure of an electronic component and a vehicle charger. Background Art

[0002] As a fixing structure of electronic components, it is known to sandwich a plurality of arranged heat-generating electronic components between a heat-dissipating component and an elastic clip so that the plurality of heat-generating electronic components and the heat-dissipating component are closely combined with each other, as disclosed in Patent Documents 1 and 2. Patent Document 1 describes a structure in which the plurality of heat-generating electronic components are pressed against the heat-dissipating component by fastening the elastic clip to the heat-dissipating component with bolts between the heat-generating electronic components and the heat-generating electronic components. Patent Documents 1 and 2 describe a structure in which the plurality of heat-generating electronic components are pressed against the heat-dissipating component by fastening the elastic clip to the heat-dissipating component with bolts on the lower side of the plurality of heat-generating electronic components.

[0003] Patent Document 1: JP2017-108121A

[0004] Patent Document 2: JP2016-167425A

[0005] In a structure in which an elastic clip is fastened to a heat dissipation element by bolts between the heat-generating electronic components, it is necessary to provide space for the bolts, the fastened portion, etc. between the electronic components and the heat-generating electronic components, and thus the size of the installation space for multiple heat-generating electronic components in the pitch direction (the arrangement direction of multiple heat-generating electronic components) becomes larger. In addition, the fastening force of the bolts varies according to the fastening margin of the bolts.

[0006] In a structure in which an elastic clip is fastened to a heat dissipation element using bolts on the lower side of a heat-generating electronic component, it is necessary to provide space for the bolts, a fastened portion, etc. on the lower side of the electronic component, and thus the size of the installation space for multiple heat-generating electronic components becomes larger in the height direction. Summary of the invention

[0007] The present disclosure provides a fixing structure of an electronic component that can reliably fix the electronic component to a wall surface of a housing and can prevent an increase in the size of a mounting space for the electronic component in the wall surface of the housing, and provides an on-vehicle charger.

[0008] A fixing structure of an electronic component, comprising: a fixing part, which is configured to fix the at least one electronic component in a state where the at least one electronic component is pressed against the wall surface of a housing in a pressing direction; and a fastened part, which is arranged at a position away from the wall surface of the housing and to which the fixing part is fastened and fixed. The fixing part comprises: a fixing part, which is fastened and fixed to the fastened part in a fastening direction intersecting with the pressing direction; at least one pressing part, which extends from the fixing part to the at least one electronic component, and the at least one pressing part is configured to press the at least one electronic component against the wall surface in the pressing direction; and at least one engaging part, which is arranged at the fixing part. The fastened part comprises at least one engaged part, which is engaged with the at least one engaging part, and the at least one engaged part is configured to cooperate with the at least one engaging part to limit the movement of the fixing part in a direction opposite to the pressing direction.

[0009] A vehicle charger comprises: a housing; an electronic component fixed to the wall surface of the housing; a fixing part, which fixes the electronic component in a state where the electronic component is pressed against the wall surface in a pressing direction; and a fastened part, which is arranged at a position away from the wall surface of the housing and to which the fixing part fastens and fixes. The fixing part comprises: a fixing part, which is fastened and fixed to the fastened part in a fastening direction intersecting with the pressing direction; a pressing part, which extends from the fixing part toward the electronic component and presses the electronic component against the wall surface in the pressing direction; and an engaging part, which is arranged at the fixing part. The fastened part comprises an engaged part, which is engaged with the engaging part, and the engaged part is configured to cooperate with the engaging part to limit the movement of the fixing part in a direction opposite to the pressing direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a perspective view showing a fixing structure of an electronic component according to an embodiment of the present disclosure;

[0011] Figure 2 The embodiment is shown with fixing parts not shown. Figure 1 A three-dimensional diagram of the fixed structure;

[0012] Figure 3 It is shown Figure 1 A three-dimensional diagram of a fixing component of a fixing structure;

[0013] Figure 4 It is shown Figure 1 The plan view of the fixed structure;

[0014] Figure 5 It is shown Figure 1 A side view of a fixing structure;

[0015] Figure 6 is a plan view showing a fixing structure of an electronic component according to another embodiment of the present disclosure;

[0016] Figure 7 is a plan view showing a fixing structure of an electronic component according to another embodiment of the present disclosure;

[0017] Figure 8 is a plan view showing a fixing structure of an electronic component according to another embodiment of the present disclosure; and

[0018] Fig. 9 is a side view showing a fixing structure of an electronic component according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0019] Hereinafter, the present disclosure will be described according to a preferred embodiment. The present disclosure is not limited to the embodiments described below, and can be appropriately changed without departing from the main purpose of the present disclosure. In the embodiments described below, although a part of the configuration is not shown or described, within the scope not inconsistent with the content described below, known or well-known technologies are appropriately applied to the details of the omitted technologies.

[0020] Figure 1 is a perspective view showing a fixing structure 10 of an electronic component 1 according to an embodiment of the present disclosure. Figure 1 The fixing structure 10 shown fixes the electronic component 1 attached to the wall surface 211 of the housing 21 of the vehicle charger 2. The fixing structure 10 includes a fixing member 100 and a base 220 to which the fixing member 100 is fastened and fixed.

[0021] The electronic component 1 is an electronic component that generates heat when powered on, and is, for example, a field effect transistor (FET) or a discrete component. The electronic component 1 includes a plurality of leads 12 and a thin rectangular main body 11 as a heat generating portion. The plurality of leads 12 are connected to a circuit board (not shown).

[0022] The heat sink 3 is attached to the wall surface 211 of the housing 21 for heat dissipation and insulation of the electronic component 1. The electronic component 1 is fixed by the fixing member 100 via the heat sink 3 in a state of being pressed against the wall surface 211 of the housing 21. In addition, a cooling water channel (not shown) is provided on the wall surface 211 of the housing 21 to promote heat dissipation of the electronic component 1.

[0023] In the present embodiment, a plurality of electronic components 1 are arranged at equal intervals along the left-right direction (direction orthogonal to the height direction) of the wall surface 211 of the housing 21. Here, the distance between the electronic components 1 is set to be narrow so that screws and bolts cannot be inserted. In each electronic component 1, one surface (heat dissipation surface) of the main body 11 is in surface contact with the heat sink 3, and the lead 12 is set to extend upward from the main body 11.

[0024] The flange 212 protrudes laterally from the wall surface 211 of the housing 21, and a plurality of bases 220 are provided on the upper surface of the flange 212. The plurality of bases 220 are arranged at equal intervals along the arrangement direction of the plurality of electronic components 1. Each base 220 includes a rectangular upper surface 220A, the length direction of which is the arrangement direction of the plurality of electronic components 1. Here, each of the plurality of bases 220 is provided corresponding to two electronic components 1.

[0025] Figure 2 The embodiment of the present invention is shown with a fixing member 100 which is not shown. Figure 1 A three-dimensional diagram of the fixing structure 10. Figure 1 and Figure 2 As shown, the base 220 extends parallel to the lower end portions near the lower end portions (each end portion on the opposite side of the lead 12 side) of the two electronic components 1. The fixing member 100 is fastened and fixed to the upper surface 220A of the base 220 by bolts 4. A pair of bosses 221 are formed on the upper surface 220A of the base 220, and a threaded hole 222 is formed in the center portion of the base 220 in the longitudinal direction.

[0026] Figure 3 yes Figure 1 A three-dimensional view of a fixing component 100 of a fixing structure 10. Figure 1 and Figure 3 As shown, the fixing member 100 includes a fixing portion 110 and a pair of pressing portions 120. The fixing portion 110 is formed in a rectangular plate shape with the long side direction being the arrangement direction of the electronic component 1. An insertion hole 111 for the bolt 4 is formed in the central portion in the length direction of the fixing portion 110. By screwing the bolt 4 inserted into the insertion hole 111 into the screw hole 222 (see Figure 2 ), the fixing portion 110 is fastened and fixed to the upper surface 220A of the base 220.

[0027] A semicircular fastened portion 112 is formed at the center of the length direction of the fixing portion 110. The fastened portion 112 is formed to protrude toward the electronic component 1 at the center of the length direction of the fixing portion 110 and at one end in the width direction (the end on the electronic component 1 side). The center of curvature of the fastened portion 112 coincides with the center of the screw hole 222.

[0028] A pair of U-shaped grooves 113 are formed at the other end portion in the width direction of the fixing portion 110 (the end portion opposite to the electronic component 1 side). The pair of grooves 113 are provided in one end side and the other end side in the length direction of the fixing portion 110. The center of curvature of the deep portion of the pair of grooves 113 is provided in the central portion in the width direction of the fixing portion 110.

[0029] Figure 4 It is shown Figure 1 The plan view of the fixed structure 10. Figure 1 and Figure 4 As shown, a pair of bosses 221 are provided at one end side and the other end side in the length direction of the upper surface 220A of the base 220. The pair of bosses 221 are provided corresponding to the pair of grooves 113, and the center position of each boss 221 coincides with the center position of the curvature of the deep part of each groove 113, and each boss 221 is engaged with the deep part of the groove 113.

[0030] The pair of pressing portions 120 are leaf springs. The pair of pressing portions 120 are arranged side by side in the arrangement direction of the electronic components 1. The fastened portion 112 is provided between the pair of pressing portions 120. Each pressing portion 120 is provided to face each electronic component 1.

[0031] Each of the pair of pressing portions 120 stands in a state of being inclined toward the electronic component 1 side from one end portion (end portion on the electronic component 1 side) in the width direction of the fixing portion 110. The tip end side of the pressing portion 120 is bent toward the side away from the electronic component 1, and the bent portion 121 of the pressing portion 120 contacts the center portion of the main body portion 11 of the electronic component 1. Thus, the elastic force of the pressing portion 120 as a leaf spring serves as a force for pressing the electronic component 1 against the wall surface 211 of the housing 21, and the electronic component 1 is fixed in a state of being pressed against the wall surface 211 by the pressing portion 120.

[0032] Figure 5 It is shown Figure 1 A side view of the fixed structure 10. Figure 5 As shown, in the fixing structure 10, the pressing force acts on the electronic component 1 and the wall surface 211 from the pressing portion 120, but the reaction force Y of the pressing force acts on the fixing portion 110 via the pressing portion 120. The reaction force Y acts in a direction perpendicular to the tightening direction of the bolt 4, but by making Figure 1 The pair of bosses 221 shown are engaged with the pair of grooves 113, and the movement of the fixing portion 110 in the direction opposite to the pressing direction is restricted due to the reaction force Y. The rotation of the fixing portion 110 fastened and fixed to the upper surface 220A of the base 220 around the bolt 4 is restricted by the pair of bosses 221 and the pair of grooves 113.

[0033] Here, a comparative example in which the fixing portion 110 is fastened and fixed to the wall surface 211 by a bolt 4 as in the above-mentioned prior art is studied. In the comparative example, it is necessary to form screw holes in the wall surface 211 around the electronic component 1 to fasten and fix the fixing portion 110, and the area of ​​the wall surface 211 expands the space for installing the fixing portion 110. When the fixing portion 110 is installed at the lower side of the electronic component 1 in the wall surface 211, the height dimension of the wall surface 211 increases, and the housing 21 becomes larger in the height direction. On the other hand, when the fixing portion 110 is installed between the electronic component 1 and the electronic component 1 in the wall surface 211, the dimension of the wall surface 211 in the lateral direction (the arrangement direction of the electronic component 1) is expanded, and the housing 21 becomes larger in the lateral direction.

[0034] On the other hand, in the fixing structure 10 of the electronic component 1 of the present embodiment, the fixing portion 110 of the fixing member 100 is fastened and fixed to the base 220, which is provided at a position away from the wall surface 211 in the direction opposite to the pressing direction. The fixing portion 110 is fastened and fixed to the base 220 by the bolt 4 in the fastening direction intersecting the pressing direction. Thus, the space for installing the fixing portion 110 can be eliminated from the lower side of the electronic component 1 in the wall surface 211 or between the electronic components 1 and the electronic components 1. Therefore, compared with the above-mentioned comparative example, the height dimension and the lateral dimension of the wall surface 211 can be reduced, and the housing 21 can be prevented from becoming larger in the height direction and the lateral direction.

[0035] In addition, in the fixing structure 10 of the electronic component 1 of the present embodiment, the cooperation between the groove 113 provided in the fixing portion 110 and the boss 221 provided in the base 220 can limit the movement of the fixing portion 110 caused by the reaction force Y in the direction opposite to the pressing direction. Therefore, the electronic component 1 can be reliably fixed in a state where the fixing member 100 is pressed against the wall surface 211, and the heat dissipation effect of the electronic component 1 can be reliably achieved.

[0036] In the fixing structure 10 of the electronic component 1 of the present embodiment, a pair of pressing portions 120 are arranged side by side in the arrangement direction of the electronic component 1, and each pressing portion 120 is provided corresponding to each electronic component. Here, since the width of each pressing portion 120 is narrower than the width of the main body portion 11 of each electronic component 1, it is unnecessary to widen the distance between the electronic components 1 and 1, and the fastened portion 112 of the fixing portion 110 can be provided between the pair of pressing portions 120. By fastening and fixing the fastened portion 112 to the base 220 existing at a position away from the wall surface 211, the fixing component 100 including the pair of pressing portions 120 is mounted to the housing 21 without unnecessarily widening the distance between the electronic components 1 and 1.

[0037] In the fixing structure 10 of the electronic component 1 of the present embodiment, a pair of grooves 113 and a pair of bosses 221 are arranged side by side in the arrangement direction of the electronic component 1. Thus, regardless of the positional relationship between the grooves 113 and the bosses 221 relative to the pressing portion 120 and the bolt 4, the rotation of the pressing portion 120 around the bolt 4 can be restricted.

[0038] Figure 6 1 is a plan view showing a fixing structure 10A of an electronic component 1 according to another embodiment of the present disclosure. Figure 6 As shown, the fixing structure 10A of this embodiment includes a circular hole 113A and a long hole 113B to replace the pair of grooves 113 of the above-mentioned embodiment. The circular hole 113A positions one boss 221 relatively in the arrangement direction and the pressing direction of the electronic component 1. At the same time, the long hole 113B positions the other boss 221 relatively in one direction of the pressing direction. Therefore, the fixing component 100 is positioned in the arrangement direction and the pressing direction of the electronic component 1.

[0039] Figure 7 FIG. 1 is a plan view showing a fixing structure 10B of an electronic component 1 according to another embodiment of the present disclosure. Figure 7 As shown, in the fixing structure 10B of this embodiment, one boss 221 is provided on one base 220, and one circular hole 113A is provided on one fixing portion 110. The circular hole 113A relatively positions the boss 221 in both the arrangement direction and the pressing direction of the electronic component 1.

[0040] Here, if the bolt 4 is a right-hand bolt, a clockwise rotational force acts on the fixing portion 110 when the bolt 4 is tightened, and if the bolt 4 is a left-hand bolt, a counterclockwise rotational force acts on the fixing portion 110 when the bolt 4 is tightened. At the same time, the circular hole 113A and the boss 221 restrict the fixing portion 110 from rotating in the clockwise and counterclockwise directions around the bolt 4. Therefore, the fixing portion 110 is prevented from rotating when the bolt 4 is tightened.

[0041] Figure 8 1 is a plan view showing a fixing structure 10C of an electronic component 1 according to another embodiment of the present disclosure. Figure 8 As shown, in the fixing structure 10C of the present embodiment, the fixing component 100C includes a pressing portion 120 and a groove 113 , and a boss 221 is disposed on a base 220 .

[0042] Here, the bolt 4 is a right-hand bolt, and when the bolt 4 is tightened, a clockwise rotational force acts on the fixing portion 110. At the same time, the groove 113 and the boss 221 are provided at positions that restrict the fixing portion 110 from rotating in the clockwise direction around the bolt 4. Therefore, the fixing portion 110 is prevented from rotating when the bolt 4 is tightened.

[0043] Fig. 9 FIG. 1 is a side view showing a fixing structure 10D of an electronic component 1 according to another embodiment of the present disclosure. Fig. 9 As shown, in the fixing structure 10D of the present embodiment, the upper surface 220A of the base 220, which is horizontal in the above embodiment, is inclined. Here, the upper surface 220A is inclined so that the height becomes smaller as the distance from the electronic component 1 side increases. Therefore, the vertical posture of the bolt 4 in the above embodiment is changed to a posture in which the head is inclined toward the side away from the electronic component 1. Therefore, when tightening the bolt 4, a fastening tool such as a screwdriver and the electronic component 1 are unlikely to interfere with each other, and the operability of the fastening operation of the bolt 4 is improved.

[0044] Although the present disclosure has been described based on the embodiments, the present disclosure is not limited to the above embodiments. The present disclosure may be modified without departing from the main purpose of the present disclosure, or known and well-known technologies may be appropriately combined. For example, in the above embodiments, the boss 221 is provided at the base 220, and the groove 113, the circular hole 113A and the long hole 113B are provided in the fixing portion 110, but the boss 221 may also be provided at the fixing portion 110, and the groove 113, the circular hole 113A and the long hole 113B may be provided in the base 220.

[0045] In the above embodiment, two pressing portions 120 are provided on one fixing member 100, but three or more pressing portions 120 may be provided on one fixing member 100. In this case, one fixing member 100 is provided corresponding to three or more electronic components 1. In addition, the number of the groove 113, the circular hole 113A, the long hole 113B and the boss 221 is not limited to one or two, and may be three or more.

[0046] According to a first aspect of the present disclosure, a fixing structure (10, 10A, 10B, 10C, 10D) of an electronic component (1) comprises: a fixing component (100, 100C) configured to fix at least one electronic component (1) in a state where the at least one electronic component (1) is pressed against a wall surface (211) of a housing (21) in a pressing direction; and a fastened portion (220) arranged at a position away from the wall surface (211) of the housing (21) and to which the fixing component (100, 100C) is fastened and fixed. The fixing component (100, 100C) comprises: a fixing portion (110) which is fastened and fixed to a fastened portion (220) in a fastening direction intersecting with a pressing direction; at least one pressing portion (120) which extends from the fixing portion (110) toward at least one electronic component (1), the at least one pressing portion (120) being configured to press the at least one electronic component (1) against a wall surface (211) in the pressing direction; and at least one engaging portion (113, 113A, 113B) which is disposed at the fixing portion (110). The fastened portion (220) comprises: at least one engaged portion (221) which is engaged with at least one engaging portion (113, 113A, 113B), the at least one engaged portion (221) being configured to cooperate with at least one engaging portion (113, 113A, 113B) to restrict movement of the fixing portion (110) in a direction opposite to the pressing direction.

[0047] According to a second aspect of the present disclosure, at least one electronic component (1) includes a plurality of electronic components (1) arranged in an arrangement direction, at least one pressing portion (120) includes a plurality of pressing portions (120) arranged in the arrangement direction, and a fixing portion (110) is fastened between adjacent pressing portions (120) among the plurality of pressing portions (120) and fixed to a fastened portion (220).

[0048] According to a third aspect of the present disclosure, at least one engaging portion (113, 113A, 113B) includes multiple engaging portions (113, 113A, 113B) arranged in an arrangement direction, and at least one engaged portion (221) includes multiple engaged portions (221) arranged in the arrangement direction.

[0049] According to a fourth aspect of the present disclosure, a vehicle charger (2) includes: a housing (21); an electronic component (1) fixed to a wall surface (211) of the housing (21); a fixing component (100, 100C) fixing the electronic component (1) in a state where the electronic component (1) is pressed against the wall surface (211) in a pressing direction; and a fastened portion (220) arranged at a position away from the wall surface (211) of the housing (21) and to which the fixing component (100, 100C) is fastened and fixed. The fixing component (100, 100C) comprises: a fixing portion (110) which is fastened and fixed to a fastened portion (220) in a fastening direction intersecting with a pressing direction; a pressing portion (120) which extends from the fixing portion (110) toward an electronic component (1) and presses the electronic component (1) against a wall surface (211) in the pressing direction; and an engaging portion (113, 113A, 113B) which is arranged at the fixing portion (110). The fastened portion (220) comprises: an engaged portion (221) which is engaged with an engaging portion (113, 113A, 113B), the engaged portion (221) being configured to cooperate with the engaging portion (113, 113A, 113B) to restrict movement of the fixing portion (110) in a direction opposite to the pressing direction.

[0050] According to the present invention, the electronic component can be reliably fixed to the wall surface of the housing, and the size of the installation space for the electronic component in the wall surface of the housing can be prevented from becoming large.

Claims

1. A fixing structure for a plurality of electronic components, comprising: a fixing member configured to fix the plurality of electronic components in a state where the plurality of electronic components are pressed against a wall surface of the housing in a pressing direction; as well as a fastened portion provided at a position away from the wall surface of the housing and to which the fixing member is fastened and fixed, wherein, The fixing member comprises: a fixing portion that is fastened and fixed to the fastened portion in a fastening direction that intersects the pressing direction; a plurality of pressing portions arranged in an arrangement direction of the plurality of electronic components, each of the plurality of pressing portions extending from the fixing portion toward the plurality of electronic components, the plurality of pressing portions being configured to press the plurality of electronic components against the wall surface in the pressing direction; and a pair of engaging portions, the pair of engaging portions being provided at the fixing portion, and The fastened portion comprises: a pair of engaged portions engaged with the pair of engaging portions, the pair of engaged portions being configured to cooperate with the pair of engaging portions to restrict movement of the fixing portion in a direction opposite to the pressing direction, and The fixing portion includes a protruding portion that protrudes from between a pair of pressing portions adjacent to each other toward one side of the plurality of electronic components at a center of the fixing portion in the arrangement direction, and the protruding portion is fastened to the fastened portion.

2. A vehicle charger, comprising: case; a plurality of electronic components fixed to a wall surface of the housing; a fixing member that fixes the plurality of electronic components while pressing the plurality of electronic components against the wall surface in a pressing direction; as well as a fastened portion provided at a position away from the wall surface of the housing and to which the fixing member is fastened and fixed, wherein, The fixing member comprises: a fixing portion that is fastened and fixed to the fastened portion in a fastening direction that intersects the pressing direction; a plurality of pressing portions arranged in an arrangement direction of the plurality of electronic components, each of the plurality of pressing portions extending from the fixing portion toward the plurality of electronic components and pressing the plurality of electronic components against the wall surface in the pressing direction; and a pair of engaging portions, the pair of engaging portions being provided at the fixing portion, and The fastened portion comprises: a pair of engaged portions engaged with the pair of engaging portions, the pair of engaged portions being configured to cooperate with the pair of engaging portions to restrict movement of the fixing portion in a direction opposite to the pressing direction, and The fixing portion includes a protruding portion that protrudes from between a pair of pressing portions adjacent to each other toward one side of the plurality of electronic components at a center of the fixing portion in the arrangement direction, and the protruding portion is fastened to the fastened portion.

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