JP5647015B2 - Substrate holding device - Google Patents

Description

  The present invention relates to a substrate holding apparatus for holding a substrate, and more particularly to a technique for improving vibration durability.

  Conventionally, many electronic devices (such as audio devices) have been provided with a substrate (such as a printed wiring board) provided with an electronic circuit. Among them, the substrate is located away from the bottom surface of the chassis of the electronic device. There are things that are retained. For example, when the board is provided in two stages, the first-stage board (lower board) is fixed to the bottom of the chassis of the electronic device, and the second-stage board (upper board) is used for the electronic device. It is held on the wall of the chassis. Conventionally, as one of such substrate holding structures, there has been proposed one in which a mounting piece is formed by bending a part of a wall surface, and the mounting piece holds the substrate (see, for example, Patent Document 1). .

JP-A-7-297572

  However, in the conventional substrate holding structure, when bending a part of the wall surface to form a mounting piece, a sharp jig (processing jig) is applied to the bent part so that a part of the wall surface is at a right angle. Bend. In that case, there is a problem that concentrated stress is applied to a bent portion bent at a right angle. Further, if the bent portion is damaged during bending, there is a problem that the bent portion is likely to break due to the scratch.

  In particular, when an electronic device is used under vibration conditions (for example, an audio device mounted on a motorcycle, etc.), high vibration durability is required, but it is concentrated at a bent portion bent at a right angle. There is a problem that stress is applied and vibration durability is lowered. In addition, there is a problem that a bent portion that is damaged during bending may be broken due to the scratch, and vibration durability is further deteriorated.

  The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to provide a substrate holding device that can obtain high vibration durability.

  The substrate holding device of the present invention is formed by bending a plate-like wall portion for holding a substrate which is a member to be held, and a part of the wall portion, and the end portion of the substrate is locked. A substrate holding device comprising: a substrate locking portion, wherein the substrate locking portion includes a first plane portion extending in parallel with the wall portion and a second plane portion extending in parallel with the substrate. And a bent portion provided between the first flat portion and the second flat portion, and the bent portion has a configuration having an R shape.

  With this configuration, the substrate that is the member to be held is held and held by the substrate locking portion. The substrate locking portion is formed by bending a part of the plate-like wall portion, and specifically includes a first flat portion, a second flat portion, and a bent portion. The first plane portion extends in parallel with the wall portion (that is, extends continuously from the wall portion). The second flat portion extends in parallel with the substrate (that is, extends so as to support the substrate). An R-shaped (rounded corner) bent portion is formed between the first plane portion and the second plane portion. In the present invention, since the bent portion has an R shape, when the bent portion is bent (sheet metal bending), the bent portion is hardly damaged. Therefore, it is possible to suppress breakage (breakage due to scratches) at the bent portion even under long-time vibration conditions, and vibration durability can be improved.

  In addition, the substrate holding device of the present invention has a configuration in which slit portions extending along the first plane portion from both sides of the bent portion are provided on both sides of the first plane portion.

  With this configuration, since the slit portions are provided on both sides of the bent portion, the stress applied to the bent portion can be dispersed. That is, when slit portions are not provided on both sides of the bent portion as in the prior art, stress during bending is concentrated on the bent portion, whereas in the present invention, on both sides of the bent portion. Since the slit portion is provided, the stress during bending can be dispersed.

  In the substrate holding device of the present invention, the first flat surface portion is provided with a convex or concave reinforcing portion, and the reinforcing portion has the slit portions on both sides of the first flat surface portion. The slit extends from the region with the slit to the region without the slit where the slit does not exist on both sides of the first plane portion.

  With this configuration, the rigidity of the first plane portion can be supplemented by the reinforcing portion provided on the first plane portion. That is, if the slit portions are provided on both sides of the first plane portion, the rigidity of the first plane portion is lowered. In this case, the rigidity of the first plane portion can be improved by the reinforcing portion. .

  Further, the substrate holding apparatus of the present invention is configured such that the length of the slit portion provided on one side of the first plane portion and the length of the slit portion provided on the other side of the first plane portion. However, each has a configuration set to have different lengths.

  With this configuration, the lengths of the slit portions provided on both sides of the first plane portion are set to be different from each other. Therefore, the length of the slit portion can be varied according to the substrate holding design or the like, and the height of rigidity can be varied on both sides of the first plane portion.

  Further, in the substrate holding device of the present invention, the one wall portion is provided with the two substrate locking portions that are respectively locked to the two end portions of the one side of the substrate, and the center of the one side is provided. The length of the slit part provided on the part side is set to be longer than the length of the slit part provided on the end part side of the one side.

  With this configuration, two substrate locking portions are provided on one wall portion, and the two end portions of one side of the substrate are locked. The length of the slit portion provided on the center side (inside) of one side of the substrate is set to be longer than the length of the slit portion provided on the end side (outside) of one side of the substrate. Yes. When one side of the substrate is held (supported) by the two substrate locking portions, stress (load) is concentrated inside the first flat surface portion. In this case, the inner slit portion is lengthened to increase the rigidity. By lowering the stress, the stress (load) can be dispersed to the outside of the first plane portion.

  The present invention can provide a substrate holding device having an effect that vibration durability can be improved by making the bent portion of the substrate locking portion formed on the wall portion into an R shape. .

The perspective view for demonstrating the structure of the board | substrate holding | maintenance apparatus in embodiment of this invention. The perspective view which expanded the principal part of the board | substrate holding | maintenance apparatus in embodiment of this invention. Sectional drawing of the principal part of the board | substrate holding | maintenance apparatus in embodiment of this invention The front view for demonstrating the structure of the board | substrate holding | maintenance apparatus in embodiment of this invention.

  Hereinafter, a substrate holding device according to an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, a case of a substrate holding device used for an audio device or the like mounted on a motorcycle or the like is illustrated.

  The configuration of the substrate holding apparatus according to the embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the substrate holding device 1 according to the present embodiment includes a chassis 2 (housing) made of a thin steel plate and a substrate 3 that is a member to be held held by the chassis 2. . The substrate 3 is, for example, a printed wiring board on which various electronic components are mounted. The chassis 2 includes a bottom plate 4 and a pair of wall plates 5 erected from both ends of the bottom plate 4. The shape of the bottom plate 4 is a substantially square shape, and the shape of the substrate 3 is also substantially the same shape (substantially a square shape) as the shape of the bottom plate 4. The pair of wall plates 5 hold both ends of the substrate 3 (two opposite sides of the substrate 3). This wall board 5 is equivalent to the wall part of this invention.

  The wall plate 5 is provided with a substrate locking portion 6 on which an end of the substrate 3 is locked. The substrate locking portion 6 is formed by bending a part of the wall plate 5. Hereinafter, the structure of the board | substrate latching | locking part 6 is demonstrated in detail, referring FIGS. As shown in FIG. 2, the substrate locking portion 6 includes a first flat portion 7 parallel to the wall plate 5, a second flat portion 8 parallel to the substrate 3, a first flat portion 7 and a second flat portion 8. The bending part 9 provided between these is provided. In this case, the substrate 3 is held by the second flat surface portion 8 of the substrate locking portion 6. In the present embodiment, a screw hole 10 is provided in the second flat surface portion 8, and the substrate 3 is fixed to the substrate locking portion 6 by screwing the screw 11 into the screw hole 10 ( (See FIG. 1).

  The bent portion 9 is formed by bending a portion of the wall plate 5 and has an R shape (round corner shape) in a side view as shown in FIG. Here, although not particularly illustrated, a round-angle jig (processing jig) is used in this bending process. That is, a part of the wall plate 5 is bent by applying a rounded jig to the bent portion 9. In this manner, the bent portion 9 having an R shape (round corner shape) is formed.

  As shown in FIGS. 2 and 4, slit portions 12 are provided on both sides of the first plane portion 7. The slit portion 12 extends along the first plane portion 7 from both sides of the bent portion 9. The first flat surface portion 7 is provided with a convex or concave reinforcing portion 13. The reinforcing portion 13 extends from a slit-provided region where the slit portions 12 are present on both sides of the first plane portion 7 to a slit-free region where the slit portions 12 are not present on both sides of the first plane portion 7. In this case, the reinforcing portion 13 has an oval shape (oval shape) in plan view. The reinforcing portion 13 is formed by drawing.

  Further, the length of the slit portion 12 provided on one side of the first plane portion 7 and the length of the slit portion 12 provided on the other side of the first plane portion 7 are different from each other. Is set to In this case, two substrate locking portions 6 for locking two end portions of one side of the substrate 3 are provided on one wall portion, and are provided on the side of the central portion (inside in FIG. 4). The length of the formed slit portion 12 is set to be longer than the length of the slit portion 12 provided on the end portion side (outside in FIG. 4) of one side.

  According to the substrate holding apparatus 1 of this embodiment, the vibration durability can be improved by making the bent portion 9 of the substrate locking portion 6 formed on the wall plate 5 into an R shape.

  That is, in this embodiment, as shown in FIG. 1, the substrate 3 that is a member to be held is locked and held by the substrate locking portion 6. As shown in FIG. 2, the board locking portion 6 is formed by bending a part of the wall plate 5, specifically, from the first flat portion 7, the second flat portion 8, and the bent portion 9. Composed. The first flat surface portion 7 extends in parallel with the wall plate 5 (that is, extends continuously from the wall plate 5). Further, the second flat portion 8 extends in parallel with the substrate 3 (that is, extends so as to support the substrate 3). An R-shaped bent portion 9 is formed between the first plane portion 7 and the second plane portion 8 (see FIG. 3). In the present embodiment, since the bent portion 9 has an R shape, the bent portion 9 is not easily damaged when the bent portion 9 is bent (sheet metal bending). Therefore, it is possible to suppress the occurrence of breakage (breakage due to scratches) at the bent portion 9 even under long-time vibration conditions, and vibration durability can be improved.

  Moreover, in this Embodiment, since the slit part 12 is provided in the both sides of the bending part 9, the stress concerning the bending part 9 can be disperse | distributed. That is, when the slit portions 12 are not provided on both sides of the bent portion 9 as in the prior art, the stress during bending is concentrated on the bent portion 9, whereas in the present invention, the bent portion Since the slit part 12 is provided in the both sides of 9, the stress at the time of a bending process can be disperse | distributed.

  Further, in the present embodiment, the rigidity of the first flat surface portion 7 can be supplemented by the reinforcing portion 13 provided on the first flat surface portion 7. That is, if the slit portions 12 are provided on both sides of the first plane portion 7, the rigidity of the first plane portion 7 is lowered. In this case, the rigidity of the first plane portion 7 is increased by the reinforcing portion 13. Can be improved.

  Moreover, in this Embodiment, as shown in FIG. 4, the length of the slit part 12 provided in the both sides of the 1st plane part 7 is set so that it may become mutually different length. Accordingly, the length of the slit portion 12 can be varied according to the design of holding the substrate, and the rigidity height can be varied on both sides of the first flat surface portion 7.

  In this case, two substrate locking portions 6 are provided on one wall plate 5 so that two end portions of one side of the substrate 3 are locked. And the length of the slit part 12 provided in the center part side (inside in FIG. 4) of one side of the board | substrate 3 is the length of the slit part 12 provided in the edge part side (outside in FIG. 4) of one side of the board | substrate 3. It is set to be longer than the length. When one side of the substrate 3 is held (supported) by the two substrate locking portions 6, stress (load) is concentrated inside the first plane portion 7. In this case, the inner slit portion 12 is lengthened. By deliberately reducing the rigidity, the stress (load) can be dispersed to the outside of the first flat surface portion 7.

  The embodiments of the present invention have been described above by way of example, but the scope of the present invention is not limited to these embodiments, and can be changed or modified according to the purpose within the scope of the claims. is there.

  For example, in the above description, the example in which the lengths of the slit portions 12 provided on both sides of the first flat surface portion 7 are set to be different from each other has been described. However, the scope of the present invention is not limited thereto. It is not limited to these, The length of the slit part 12 provided in the both sides of the 1st plane part 7 may be set so that it may become the same length, respectively.

  Moreover, although the above description demonstrated the example which the reinforcement part 13 is an oval type (oval shape), the shape of the reinforcement part 13 is not limited to this. Further, in the above description, an example in which one reinforcing portion 13 is provided for one substrate holding portion has been described, but a plurality of reinforcing portions (for example, more elongated reinforcing portions) are arranged in one substrate holding portion. It may be provided.

  As described above, the substrate holding device according to the present invention has an effect that vibration durability can be improved, and is useful for being applied to audio equipment and the like mounted on a motorcycle.

DESCRIPTION OF SYMBOLS 1 Substrate holding device 2 Chassis 3 Substrate 4 Bottom plate 5 Wall plate (wall part)
6 Substrate locking part 7 First plane part 8 Second plane part 9 Bending part 10 Screw hole 11 Screw 12 Slit part 13 Reinforcing part

Claims (1)

A plate-like wall portion for holding a substrate which is a member to be held;
A substrate locking portion formed by bending a part of the wall portion, and an end portion of the substrate being locked;
A substrate holding device comprising:
The substrate locking portion includes a first plane portion extending in parallel with the wall portion, a second plane portion extending in parallel with the substrate, and between the first plane portion and the second plane portion. And a bent portion provided in
The bent portion has an R shape ,
On both sides of the first plane portion, slit portions extending along the first plane portion from both sides of the bent portion are provided,
The first flat portion is provided with a convex or concave reinforcing portion,
The reinforcing portion extends from a slit region where the slit portion exists on both sides of the first plane portion to a slit-free region where the slit portion does not exist on both sides of the first plane portion,
The length of the slit portion provided on one side of the first plane portion and the length of the slit portion provided on the other side of the first plane portion are different from each other. Set,
One of the wall portions is provided with two substrate locking portions that are respectively locked to two ends of one side of the substrate,
The length of the slit portion provided on the central portion side of the one side is set to be longer than the length of the slit portion provided on the end portion side of the one side. apparatus.

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