JP5627784B2 - Electronic component holding structure and electronic device using the same - Google Patents

Description

  The present invention relates to an electronic component holding structure for holding an electronic component such as a transistor housed in a holder on a substrate and a chassis, and an electronic apparatus using the electronic component holding structure.

Conventionally, an electronic component having a through hole for screwing such as a power transistor may be held in an electronic device by being attached to a substrate by soldering or the like and screwed through the through hole. Thus, by firmly holding together with screwing, it is possible to prevent a terminal attached to the substrate from being deformed and short-circuited due to an external force applied to the transistor and to prevent a soldered portion of the terminal from being damaged.
For example, Patent Document 1 discloses a method of attaching a transistor mounted on a substrate to a heat dissipation member. In this method, the transistor body is fitted into the recess of the transistor mounting guide to restrict its movement, and then the transistor is screwed to the heat dissipation member. By doing so, the transistor body is prevented from rotating together with screws to the heat radiating member and the terminals are prevented from being deformed.

JP-A-6-177563

If the holding structure is such that the transistor housed in the holder is attached to the substrate and is screwed to the chassis of the electronic device, the transistor mounting guide of Patent Document 1 is unnecessary.
However, conventionally, due to the influence of the dimensional tolerance of the transistor (electronic component), the through hole of the transistor and the screw hole of the holder are displaced from each other. There was a problem that the peripheral surface was cut. If the shavings enter the electronic device, there is a possibility of causing a problem.

  The present invention has been made to solve the above-described problems, and an electronic component holding structure capable of reducing the influence of the dimensional tolerance of the electronic component by attaching the electronic component housed in the holder and the same are used. The purpose is to obtain electronic equipment.

In the electronic component holding structure according to the present invention, an electronic component having a through hole for screwing is accommodated in a holder, a terminal of the electronic component accommodated in the holder is attached to a substrate, and a hole provided in the through hole and the holder is provided. the electronic component an electronic component holding structure for screwing through, the holder includes a fitting part which engages on the upper surface of the electronic component when accommodating the electronic component holder, accommodating electronic components engaged A first engaging portion for positioning the through hole of the electronic component with respect to the hole provided in the holder with a dimension from the center of the through hole of the electronic component to the terminal side surface of the electronic component ; A second engagement portion that engages with the electronic component and restricts movement of the electronic component in the direction of the through hole in the holder, and both side surfaces of the holder are in contact with the electronic component .

  According to this invention, there is an effect that the influence of the dimensional tolerance of the electronic component can be reduced by attaching the electronic component housed in the holder.

It is a figure which shows the electronic device using the electronic component holding structure which concerns on Embodiment 1 of this invention. It is a figure which shows the conventional electronic component holding structure. It is a figure for demonstrating the subject in the conventional electronic component holding structure. It is a figure which shows the electronic component holding structure which concerns on Embodiment 1. FIG. 4 is a side view showing an electronic component housed in a holder according to Embodiment 1. FIG. It is a figure which shows the electronic component holding structure which concerns on Embodiment 2 of this invention. It is a figure which shows the mode of the electronic component accommodated in the holder which concerns on Embodiment 2. FIG. 6 is a side view showing an electronic component housed in a holder according to Embodiment 2. FIG.

Hereinafter, in order to describe the present invention in more detail, modes for carrying out the present invention will be described with reference to the accompanying drawings.
Embodiment 1 FIG.
FIG. 1 is a view showing an electronic apparatus using the electronic component holding structure according to Embodiment 1 of the present invention. The housing main body of the electronic device 1 shown in FIG. 1 is configured using a box-shaped chassis 15 opened in at least one direction and a top plate 16 attached so as to cover the opening. A substrate 13 on which electronic components are mounted is housed in the housing body. The electronic component holding structure according to the present invention holds the transistor (electronic component) 10 housed in the holder 2 according to the first embodiment on the substrate 13 and the chassis 15 of the electronic device 1.

Here, a conventional electronic component holding structure will be described.
FIG. 2 is a view showing a conventional electronic component holding structure. As shown in FIG. 2A, the conventional holder 100 has an engaging portion 101, leg portions 102 and 103, and a burring hole 104. In addition, a hole for passing the screw 14 is formed at a position facing the burring hole 104 of the holder 100. On the other hand, the transistor 10 is provided with a through hole 11 and a terminal 12 for screwing, as shown in FIG. The terminal 12 is formed of a wedge-shaped terminal base portion 12a and a tip portion 12b.
In the conventional holder 100, the burring hole 104 and the through hole 11 are positioned according to the dimension H from the center position of the through hole 11 of the transistor 10 to the connection portion with the tip end portion 12b of the terminal base 12a.

The transistor 10 accommodated in the holder 100 is held on the substrate 13 and the chassis 15 as shown in FIG.
First, the leg portions 102 and 103 of the holder 100 and the tip end portion 12 b of the terminal 12 of the transistor 10 are inserted into the terminal holes of the substrate 13, and the engaging portion 101 is hooked on the holder mounting portion of the chassis 15. At this time, the terminal portion 12 b of the transistor 10 is inserted until the terminal base portion 12 a is caught in the terminal hole of the substrate 13.
Next, the holder 14 and the hole of the transistor 10 are passed through the hole provided in the chassis 15, and the screw 14 is screwed with the burring hole 104. Thereafter, the leg portions 102 and 103 and the tip end portion 12b of the terminal 12 are fixed to the substrate 13 by soldering.

FIG. 3 is a diagram for explaining a problem in the conventional electronic component holding structure. 2B, the through hole 11 of the transistor 10 and the burring hole 104 of the holder 100 coincide with each other as shown in FIG. 3A.
However, the dimensions of the terminal 12 vary and the tolerance of the dimension H is large. For this reason, when the transistor 10 accommodated in the holder 100 is attached to the substrate 13, the positions of the through hole 11 of the transistor 10 and the burring hole 104 of the holder 100 may be displaced as shown in FIG.

  In FIG. 3B, when the terminal base 12a ′ is short and the tip 12b ′ is inserted into the substrate 13, the transistor 10 sinks more than in the case of FIG. 3A and the dimension H becomes the dimension H ′. The through hole 11 and the burring hole 104 of the holder 100 are shifted by a shift h. In this case, if the positional deviation is such that the screw 14 can penetrate, screwing is possible. However, when screwing, the peripheral portion of the opening and the inner peripheral surface of the through hole 11 are scraped by the screw 14.

Therefore, in the present invention, the dimension H is not used for positioning of the burring hole of the holder and the through hole 11 of the transistor 10, and from the center of the through hole 11 of the transistor 10 to the bottom surface of the main body of the transistor 10 (the surface on the terminal 12 side). Position with the dimensions of.
FIG. 4 is a diagram illustrating the electronic component holding structure according to the first embodiment. As shown in FIG. 4A, the holder 2 according to the first embodiment has an engagement portion 3, leg portions 4, 5, a positioning claw 6, and a burring hole 7. The positioning claw 6 is formed by cutting and raising the side plate of the holder 2, and the bottom surface portion 8 of the transistor 10 held by the holder 2 is caught. Accordingly, as shown in FIG. 4B, the through hole 11 with respect to the burring hole 7 has a dimension Ha from the center of the through hole 11 of the transistor 10 to the bottom surface of the main body of the transistor 10 (surface on which the terminal 12 is provided). Positioning is performed. In the dimension Ha, since the dimension of the main body of the transistor 10 has little variation, its tolerance is small. Therefore, the position shift of the through hole 11 with respect to the burring hole 7 can be reduced.

  As shown in FIG. 4C, the transistor 10 is held in the electronic device 1 by inserting the leg portions 4 and 5 of the holder 2 and the tip end portion 12 b of the terminal 12 of the transistor 10 into the terminal hole of the substrate 13. The attaching and engaging portion 3 is hooked on the holder attaching portion of the chassis 15. Next, the holder 14 and the through hole 11 of the transistor 10 are passed through the hole provided in the chassis 15, and the screw 14 is screwed to the burring hole 7. At this time, since the positioning is performed with a small dimension Ha, there is no displacement between the through hole 11 of the transistor 10 and the burring hole 7 of the holder 2, and the peripheral portion of the opening of the through hole 11 of the transistor 10 by the screw 14 The shaving of the inner peripheral surface can be eliminated.

  As described above, according to the first embodiment, the size of the holder 2 from the center of the through hole 11 of the transistor 10 to the surface on the terminal 12 side of the transistor 10 is engaged with the accommodated transistor 10. A positioning claw 6 for positioning the through hole 11 of the transistor 10 with respect to the burring hole 7 provided in the holder 2 is provided. With this configuration, the influence of the dimensional tolerance of the transistor 10 can be reduced by mounting the transistor 10 housed in the holder 2.

Embodiment 2. FIG.
In the first embodiment, the case where the holder 2 is provided with the positioning claw 6 and the vertical positioning of the transistor 10 is performed with the dimension Ha is shown. In the second embodiment, in addition to the vertical positioning, a positioning claw for regulating the movement of the transistor 10 housed in the holder and positioning in the front-rear direction is newly provided.

  FIG. 5 is a side view showing the electronic component housed in the holder according to the first embodiment. The holder 2 according to the first embodiment positions the transistor 10 in the vertical direction with only the positioning claws 6. For this reason, as shown in FIG. 5, the transistor 10 may move in the holder 2 and the terminal 12 may swing in the A direction. This hinders the operation of inserting the terminal 12 into the terminal hole of the substrate 13. Therefore, in the second embodiment, the positioning of the transistor 10 in the front-rear direction is performed by providing a new positioning claw in the holder and restricting the movement of the transistor 10 accommodated in the holder.

  FIG. 6 is a diagram showing an electronic component holding structure according to Embodiment 2 of the present invention. As shown in FIG. 6A, the holder 2A according to the second embodiment includes a positioning claw 9 in addition to the configuration of the first embodiment. The positioning claw 9 is formed by cutting and raising the side plate of the holder 2A, and the front portion of the transistor 10 housed in the holder 2A is caught. Accordingly, the movement of the transistor 10 (the swing of the terminal 12) as shown in FIG. 5 can be restricted.

  FIG. 7 is a diagram illustrating a state of the electronic component housed in the holder according to the second embodiment. As shown in FIG. 7A, when the front portion of the transistor 10 is caught by the positioning claw 9, the transistor 10 is restricted from moving in the direction A in FIG. Further, as shown in FIG. 7B, the positioning claw 6 performs vertical positioning with the dimension Ha of the transistor 10.

  FIG. 8 is a side view showing the electronic component housed in the holder according to the second embodiment. By pressing the front portion of the transistor 10 from behind the transistor 10 so that the front portion is caught, the substrate is positioned up and down with the positioning claw 6 and front and back with the positioning claw 9 as shown in FIG. 13 and chassis 15 can be attached. Therefore, the terminal 12 does not swing in the direction A in FIG. 5, and the workability of attaching the transistor 10 can be improved.

  As described above, according to the second embodiment, the holder 2A includes the positioning claw 9 that engages with the accommodated transistor 10 and regulates the movement of the transistor 10 in the holder 2A. With this configuration, the same effects as those of the first embodiment can be obtained, and the transistor 10 accommodated in the holder 2A can be easily attached to the substrate 13 and the chassis 15.

  In the first embodiment and the second embodiment, the positioning claws 6 and 9 are caught by the transistor 10 to perform positioning. However, any engaging portion that engages with the transistor 10 to perform positioning may be used. It is not limited to the nail shape. For example, it may be an engaging projection that holds the transistor 10 from both sides. Moreover, the engaging recessed part which fits and positions the convex part provided in the transistor 10 may be sufficient.

  In the present invention, within the scope of the invention, any combination of each embodiment, any component of each embodiment can be modified, or any component can be omitted in each embodiment. .

  DESCRIPTION OF SYMBOLS 1 Electronic device, 2,2A holder, 3 engaging part, 4,5 leg part, 6,9 positioning claw, 7 burring hole, 8 bottom part, 10 transistor, 11 through-hole, 12 terminal, 12a terminal base, 12b tip Part, 13 substrate, 14 screw, 15 chassis, 16 top plate, 100 holder, 101 engaging part, 102, 103 leg part, 104 burring hole.

Claims (2)

An electronic component having a through hole for screwing is stored in a holder, a terminal of the electronic component stored in the holder is attached to a substrate, and the electronic component is screwed through the through hole and the hole provided in the holder. Electronic component holding structure
The holder engages with the hooked portion that is engaged with the upper surface of the electronic component when the electronic component is housed in the holder, and engages the electronic component from the center of the through hole of the electronic component. A first engaging portion for positioning the through hole of the electronic component with respect to the hole provided in the holder in a dimension up to the terminal side surface of the component, and engaging with the stored electronic component; A second engaging part for restricting movement of the electronic component in the holder in the direction of the through hole ,
An electronic component holding structure, wherein both side surfaces of the holder are in contact with the electronic component. An electronic apparatus using the electronic component holding structure according to claim 1 Symbol placement.

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