JP5954305B2 - securing bracket - Google Patents

Description

  The present invention relates to a fixture used mainly in electronic equipment.

  Since a semiconductor used in a general electronic device is an electronic component that generates heat at a high temperature, for example, a fixing member is pressed and fixed to a heat radiating member such as a heat sink. As a metal fitting for fixing a plurality of electronic components at a time, for example, as shown in Patent Document 1, a plurality of fixing portions extending along the arrangement of the electronic components and a plurality of protrusions protruding in a comb shape with respect to the fixing portions are provided. The structure provided with the contact piece provided with the elastic part which has is known.

International Publication No. 2010/119546

  Here, the fixing bracket described in Patent Document 1 is used by being fixed to a heat sink, for example, but the contact piece provided near the fixing position where the fixing bracket is fixed and the contact piece provided apart from the fixing position are used. When compared with the contact piece, the pressing force on the electronic component may become weaker as the contact piece moves away from the fixed position. For this reason, there is a possibility that the electronic component separated from the fixing position cannot be reliably pressed and fixed.

  The present invention has been made in view of the above, and an object of the present invention is to provide a fixture that can reliably press a plurality of electronic components.

  In order to achieve the above-mentioned object, a fixing bracket according to the present invention includes a fixing portion fixed to a housing and a spring portion having elasticity, and a plurality of members each pressing a plurality of electronic components against the housing. And a pressing bracket, wherein at least a part of a path connecting between the pressing section and the fixing section differs depending on the plurality of pressing sections.

  The fixing bracket described in Patent Document 1 has a configuration in which a base portion extending in the same direction as the arrangement direction of electronic components is fixed on both ends, and a pressing portion that presses a plurality of electronic components extends from the base portion. In the case of this conventional fixing bracket, when the positions for fixing the base are both ends, the electronic component on the end side is preferably pressed, while the inner electronic component, that is, the electronic component separated from the fixing portion is pressed. The pressing part for doing so has a lower pressing force than the pressing part on the end side, and there is a possibility that the force for pressing the electronic component is not sufficient. On the other hand, in the fixing metal fitting according to the present invention, the path between the pressing portion and the fixing portion is configured to be different depending on the plurality of pressing portions. The pressed portion is difficult to receive. Therefore, a plurality of electronic components can be pressed reliably.

  In addition, the plurality of electronic components are arranged in one direction, the fixing bracket includes a base portion extending along the arrangement direction of the plurality of electronic components, and the fixing portion is separated from the center of the plurality of electronic components. The pressing portion that is provided at a position and presses an electronic component far from the fixed portion among the plurality of electronic components may be connected via the base.

  As described above, the pressing part that presses the electronic component far from the fixed part is connected via the base that can further increase the rigidity, so that even more remote electronic Parts can be pressed.

  The fixing portion is provided on both ends of the base portion, and the pressing portion that presses an inner electronic component of the plurality of electronic components protrudes in a direction intersecting the base portion from the base portion. can do.

  In the case of said structure, an electronic component can be more reliably pressed by a press part using the stability of the base fixed to a housing | casing by the fixing | fixed part of both ends.

  In addition, the pressing portion that presses the electronic components on both ends of the plurality of electronic components is connected to the fixing portion via a side edge that extends in a direction different from the direction in which the base extends from the fixing portion. It can be set as the aspect connected.

  In this case, since the transmission direction of the force from the fixed part to the pressing part can be different from the pressing part connected via the base part, the transmission of the force from the fixing part can be more suitably performed. An electronic component can be suitably pressed.

  Furthermore, the widths of the plurality of pressing portions can be different from each other depending on the distance from the fixed portion.

  By varying the width of the pressing portion according to the distance from the fixed portion, it is possible to press a plurality of electronic components with a more uniform force. Specifically, it is preferable to increase the width of the pressing portion as the pressing portion becomes farther from the fixed portion.

  Moreover, it is good also as an aspect provided with the through-hole for positioning. In this case, the fixing bracket can be more accurately fixed to the housing, and the electronic component can be fixed with higher accuracy.

  According to the present invention, a fixing bracket capable of reliably pressing a plurality of electronic components is provided.

It is a perspective view which shows a part of electronic device containing the fixing metal fitting which concerns on this embodiment. It is a perspective view of the fixing metal fitting concerning this embodiment. It is a front view of the fixing metal fitting concerning this embodiment. It is a disassembled perspective view at the time of attachment of the fixing metal fitting which concerns on this embodiment. It is a perspective view of the electronic device containing the fixture which concerns on a modification.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

  First, the fixture according to the present embodiment will be described with reference to FIGS. FIG. 1 is a perspective view illustrating a part of an electronic apparatus according to the present embodiment. In FIG. 1, as an electronic device, a part of a power supply device (switching power supply device) is cut away. FIG. 2 is a perspective view of the fixing bracket, and FIG. 3 is a front view of the fixing bracket. 4 is an exploded perspective view of the power supply device 1 shown in FIG. In each figure, XYZ axes are described as necessary for the explanation of the configuration.

  The power supply device 1 generates a DC output voltage by, for example, converting (decreasing) a DC voltage input from a high voltage battery connected to an input terminal, and outputs the DC output voltage from the output terminal to the low voltage battery. It functions as a converter. In addition, examples of the electronic device to which the plate-like metal member according to the present invention can be applied include an audio device in addition to the switching power supply device, but are not particularly limited.

  As a general configuration of the switching power supply device, a configuration in which an input smoothing capacitor, a switching circuit, a transformer, a rectifier circuit, a smoothing circuit, a control unit, and the like are provided in a housing can be given. In FIG. 1, as components constituting the power supply device 1, a housing 10, a circuit board 20 in which a switching circuit and the like are accommodated, and electronic components 25 to 28 ( Transistor). In addition, the power supply device 1 includes a fixing bracket 30 that characterizes the present invention.

  The housing 10 constitutes a part of a metal case of the power supply device 1. In the power supply device 1, the electronic component is accommodated in the housing 10 and then covered with a cover (not shown). In FIG. 1, the side wall of the housing 10 that constitutes the case side surface of the power supply device 1 is also omitted. On the bottom surface side of the housing 10, for example, a radiation fin for cooling the housing 10 is provided, and the housing 10 is cooled by cooling the radiation fin by air cooling, and the power source placed on the upper surface side. Each part of the device 1 is cooled. That is, the casing 10 constitutes a part of the outer shape of the power supply device 1 and functions as a heat sink that dissipates heat from the electronic components that constitute the power supply device 1.

  The circuit board 20 placed on the housing 10 is a flat printed board, and a circuit of a power supply device is provided inside. Further, each component such as a transformer, an inductor, and a capacitor is mounted on the circuit board 20. On the lower surface side of the circuit board 20, a heat conductive material for insulating the circuit board 20 and the housing 10 and transferring heat from the circuit board 20 to the housing 10 is provided as necessary. The lower surface side of the circuit board 20 is thermally connected to the bottom surface portion of the housing 10 through the heat conductive material.

  The transistors 25 to 28 are attached so as to protrude outward from the circuit board 20 in one direction (Y-axis direction) along the end of the circuit board 20. Since the transistors 25 to 28 generate heat at a high temperature, it is necessary to dissipate heat by being thermally connected to the housing 10 via a thermally conductive material in the same manner as the circuit board 20. In order to surely radiate heat from the transistors 25 to 28, a fixing bracket 30 is provided. The fixing bracket 30 is fixed with screws to the protruding portions 11 and 12 protruding from the bottom surface of the housing 10. This point will be described later.

  The fixing bracket 30 will be described with reference to FIGS. The fixture 30 is made of a metal material having thermal conductivity, and is manufactured, for example, by punching a metal plate and bending it. As shown in FIGS. 2 and 3, the fixture 30 includes a base 31 extending along the arrangement direction (Y-axis direction) of the transistors 25 to 28, and an extending direction of the base 31 from both ends of the base 31 ( Two side edge portions 33 and 34 extending in a direction orthogonal to the (Y-axis direction) (X-axis direction) are provided. In order to increase the rigidity of the base portion 31, the side opposite to the transistor side is bent downward by a folding line 32 extending along the extending direction of the base portion 31.

  The side edge portion 33 is provided with a screw hole 41 for fixing the screw to the housing 10 and a through hole 42 for positioning the fixing bracket 30. Similarly, the side edge portion 34 is provided with a screw hole 43 for fixing the screw to the housing 10 and a through hole 44 for positioning the fixing bracket 30. Further, a pressing portion 51 extending along the Y-axis direction is provided from the end portion of the side edge portion 33 opposite to the end portion on the base portion 31 side. The pressing portion 51 extends along the Y-axis direction and inclines downward (Z-axis negative direction), and includes an elastic spring portion 51A and a contact portion 51B bent upward with respect to the spring portion 51A. Have. Similarly, a pressing portion 54 extending along the Y-axis direction is provided from an end portion of the side edge portion 34 opposite to the end portion on the base portion 31 side. The pressing portion 54 extends along the Y-axis direction and inclines downward (Z-axis negative direction), and includes an elastic spring portion 54A and an abutting portion 54B bent upward with respect to the spring portion 54A. Have. The pressing portion 51 and the pressing portion 54 face each other and are provided at positions corresponding to the transistors 25 and 28, respectively. The pressing portions 51 and 54 have a uniform width from the root portion connected to the side edge portions 33 and 34 to the tip portions of the contact portions 51B and 54B, respectively.

  Two pressing portions 52 and 53 that extend in a direction orthogonal to the extending direction of the base portion 31 (X-axis direction) are provided from the base portion 31. The pressing portion 52 is provided at a position corresponding to the transistor 26, extends along the X-axis direction and inclines downward (Z-axis negative direction), and has an elastic spring portion 52A and an upper portion with respect to the spring portion 52A. And a contact portion 52B that is bent in the direction. The pressing portion 54 is provided at a position corresponding to the transistor 27, extends along the X-axis direction and inclines downward (Z-axis negative direction), and has an elastic spring portion 53A and an upper portion with respect to the spring portion 53A. And an abutting portion 53B that is bent in the direction.

  The pressing portion 52 has the largest width at the end portion on the base portion 31 side of the spring portion 52A, and the width is gradually reduced toward the end portion on the contact portion 52B side of the spring portion 52A. That is, the width of the spring portion 52A at the connection portion with the base portion 31 is larger than the width of the contact portion 52B. This also applies to the pressing portion 53. The widths of the contact parts 52B and 53B are larger than the contact part 51B of the pressing part 51 and the contact part 52B of the pressing part 52 connected to the side edge parts 33 and 34, respectively.

  The spring portions 52A and 53A are provided with openings 56 and 57, respectively. This is provided to prevent the fixture 30 from interfering with a jig used when the transistors 26 and 27 are attached to the circuit board 20. The recessed portion 26A (see FIG. 1) provided and the fixture 30 are formed so as not to overlap. Similarly, the opening 57 is formed so as not to overlap the recess 27 </ b> A of the transistor 27. Further, a notch portion 55 is formed in the spring portion 52A so as not to overlap the concave portion 25A of the transistor 25. Similarly, a notch 58 is formed in the spring portion 53A so as not to overlap the recess 28A of the transistor 28.

  Next, a method for attaching the fixing bracket 30 will be described with reference to FIG. The protruding portion 11 of the housing 10 is provided with a screw hole 111 for fixing the screw and a convex portion 112 for positioning. Similarly, the projecting portion 12 is provided with a screw hole 121 and a convex portion 122. The side edge 33 of the fixing bracket 30 corresponds to the protrusion 11 and the protrusion 112 passes through the through hole 42, and the side edge 34 corresponds to the protrusion 12 and the protrusion 122 passes through the through hole 44. As described above, the fixing bracket 30 is attached to the housing 10. Then, the screw hole 111 on the protruding portion 11 side and the screw hole 41 on the fixing bracket 30 are fixed with the screw 61, and the screw hole 121 on the protruding portion 12 side and the screw hole 43 on the fixing bracket 30 are fixed with the screw 62. The fixing bracket 30 is fixed to the housing 10. That is, the periphery of the screw holes 41 and 43, which are positions fixed to the housing 10 by the screws 61 and 62, becomes a fixing portion when the fixing bracket 30 is fixed to the housing 10.

  When the fixing bracket 30 is fixed at the above position, the contact portion 51B of the pressing portion 51 of the fixing bracket 30 contacts the transistor 25 and presses the transistor 25. Similarly, the contact portion 52B of the pressing portion 52 contacts the transistor 26 and the transistor 26 is pressed. Further, the contact portion 53B of the pressing portion 53 contacts the transistor 27 and the transistor 27 is pressed. Then, the contact portion 54B of the pressing portion 54 contacts the transistor 28 and the transistor 28 is pressed.

  Here, in the fixing bracket 30 according to the present embodiment, the method of pressing the four transistors 25 to 28 is different. Here, a description will be given based on the relationship with the distance from one of the screw holes 41 and 43 that are the fixing portions. First, the transistor 25 is an electronic component close to the screw hole 41 and is pressed and fixed by a pressing portion 51 extending in the Y-axis direction from the side edge portion 33 where the screw hole 41 is provided. That is, the path connecting the pressing portion 51 and the fixing portion is a part of the side edge portion 33. The pressing portion 51 extends in the Y axis direction and presses the transistor 25 from the Y axis direction.

  Next, the transistor 26 is an electronic component that is far away from the screw hole 41 compared to the transistor 25, and is pressed by the pressing portion 52 connected from the screw hole 41 through the side edge portion 33 and the base portion 31. Fixed. That is, the path connecting the pressing portion 52 and the fixing portion includes the side edge portion 33 and a part of the base portion 31. The pressing portion 52 extends in the X-axis direction and presses the transistor 26 from the X-axis direction.

  Next, the transistor 27 is an electronic component having a large distance from the screw hole 43 like the transistor 26, and is fixed by a pressing portion 53 connected from the screw hole 43 via the side edge portion 34 and the base portion 31. Is done. That is, the path connecting the pressing portion 53 and the fixing portion includes a part of the side edge portion 34 and the base portion 31. The pressing portion 53 extends in the X axis direction and presses the transistor 27 from the X axis direction.

  Similarly to the transistor 25, the transistor 28 is an electronic component close to the screw hole 43, and is pressed and fixed by a pressing portion 54 extending in the Y-axis direction from the side edge portion 34 provided with the screw hole 43. That is, the path connecting the pressing portion 54 and the fixed portion is a part of the side edge portion 34. The pressing portion 54 extends in the Y-axis direction and presses the transistor 25 from the Y-axis direction. As described above, the pressing portions 51 to 54 for pressing and fixing the transistors 25 to 28 have different paths from the screw holes 41 and 43 corresponding to the fixing portions.

  In a conventional fixing bracket, a configuration has been known in which base portions extending in the same direction as the arrangement direction of electronic components are fixed on both ends, and pressing portions for pressing a plurality of electronic components extend from the base portions. In the case of this conventional fixing bracket, when the positions for fixing the base are both ends, the electronic component on the end side is preferably pressed, while the inner electronic component, that is, the electronic component separated from the fixing portion is pressed. The pressing part for doing so has a lower pressing force than the pressing part on the end side, and there is a possibility that the force for pressing the electronic component is not sufficient. This is because the force due to being fixed by the fixing portion is transmitted to the pressing portion via the same path (base), so that the force is sufficiently transmitted to the pressing portion closer to the pressing portion, while the distant pressing portion It is thought that this is because the power does not reach enough.

  On the other hand, in the fixing bracket 30 according to the present embodiment, the path between the pressing portions 51 to 54 and the screw holes 41 and 43 corresponding to the fixing portions is different depending on the pressing portions 51 to 54. The structure is configured such that the pressing portion (for example, the pressing portion 52) that is separated from the fixed portion is not easily affected by the force applied to the near pressing portion (for example, the pressing portion 51). Therefore, the transistors 25 to 28 which are a plurality of electronic components can be reliably pressed.

  The fixing bracket includes a base 31 extending along the arrangement direction of the transistors 25 to 28, and screw holes 41 and 43 serving as fixing portions are provided at positions separated from the centers of the four transistors 25 to 28. ing. Here, the pressing portions 52 and 53 that press the transistors 26 and 27 that are separated from the screw holes 41 and 43, that is, far from the fixing portion, are connected via the base portion 31. When pressing the distant transistors 26 and 27, the force is transmitted through the base 31 extending along the arrangement direction of the transistors 25 to 28 and having increased rigidity. However, the transistor can be pressed more reliably.

  Further, the screw holes 41 and 43 as the fixing portions are provided in the side edge portions 33 and 34 that are both ends of the base portion 31, and the pressing portions 52 and 53 that press the inner transistors 26 and 27 are provided from the base portion 31 to the base portion 31. It protrudes in a direction that intersects with the direction in which it extends. Thereby, the transistors 26 and 27 can be more reliably pressed by the pressing portions 52 and 53 using the stability of the base 31.

  In addition, the pressing portions 51 and 54 that press the transistors 25 and 28 on both ends are in a direction (X-axis direction) different from the direction (Y-axis direction) in which the base portion 31 extends from the screw holes 41 and 43 that are fixing portions. It connects with a fixing | fixed part via the side edge parts 33 and 34 extended in this. Thereby, since the direction of transmission of the force from the screw holes 41 and 43, which are the fixing parts, to the pressing parts 51 and 54 can be made different from the pressing parts 52 and 53 connected via the base 31, the fixing part Can be more suitably transmitted, and the transistors 25 to 28 can be preferably pressed.

  Further, the width of the pressing portions 51 and 54 is smaller than the width of the pressing portions 52 and 53. Thus, the four transistors 25 to 28 can be pressed with a more even force by changing the width of the pressing portion according to the distance from the fixed portion. Specifically, it is preferable to increase the width of the pressing portion as the pressing portion becomes farther from the fixed portion.

  Further, since the fixing bracket 30 further includes the positioning through holes 42 and 44, the fixing bracket 30 can be more accurately fixed to the housing 10, and the electronic component can be fixed with higher accuracy. be able to. The positioning through holes 42 and 44 are preferably provided in the side edge portions 33 and 34 in the vicinity of the fixed portion, respectively.

  As mentioned above, although embodiment of this invention was described, the coil | winding components and power supply device which concern on this invention are not limited to the above, A various change can be performed.

  For example, although the case where the four transistors 25 to 28 are fixed has been described above, the number of electronic components to be fixed is not particularly limited. When fixing the base 31 at two locations on both ends, for example, the distance between the center (inside) electronic component and the outside electronic component is different from the fixed portion, so the path connecting the pressing portion and the fixed portion is changed. By doing so, each electronic component can be suitably pressed.

  Moreover, even if the fixing bracket is fixed to the housing at one location, the effects of the present invention can be sufficiently obtained. FIG. 5 is a perspective view showing a power supply device 1A according to a modification of the embodiment. In the power supply device 1A of FIG. 5, a fixing bracket 30A that presses only the transistors 27 and 28 among the transistors included in the power supply device 1 of FIG. 1 is shown. The fixing bracket 30A is a half of the fixing bracket 30 shown in FIG. 1, that is, only the transistors 27 and 28 side, that is, includes a base 31 and side edges 34, and extends from the base 31 to press the transistor 27. A portion 53 and a pressing portion 54 that extends from the side edge portion 34 and presses the transistor 28 are provided, and are fixed to the housing 10 by screws 62. Even if such a fixed portion has a single configuration, the path between the pressing portions 53 and 54 and the fixing portion is different from each other as in the case of the fixing bracket 30 described above. The pressing portion 53 that is separated from the fixed portion is not easily affected by the force. Therefore, the transistors 27 and 28 that are a plurality of electronic components can be reliably pressed.

DESCRIPTION OF SYMBOLS 1, 1A ... Power supply device, 10 ... Case, 20 ... Circuit board, 25-28 ... Transistor, 30, 30A ... Fixing metal fitting, 31 ... Base, 51-54 ... Pressing part.

Claims (3)

A fixing part fixed to the housing;
A fixing bracket comprising a plurality of pressing parts each including a spring part having elasticity and pressing a plurality of electronic components arranged in one direction against the housing,
A base extending along an arrangement direction of the plurality of electronic components;
A fixing portion provided on both ends of the base portion,
The pressing portion that presses an inner electronic component among the plurality of electronic components protrudes in a direction intersecting the base from the base,
The pressing portion that presses the electronic components on both ends of the plurality of electronic components is connected to the fixing portion via a side edge portion that extends in a direction different from the direction in which the base portion extends from the fixing portion. fixing bracket that. The fixing bracket according to claim 1 , wherein the width of each of the plurality of pressing portions is larger as the position of the pressing portion is farther from the fixing portion. Fixing bracket according to claim 1 or 2 comprising a through hole for positioning.

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