JP5019253B2 - Fixed parts and parts fixing structure - Google Patents

Description

The present invention relates to a fixing component and a component fixing structure for mounting a circuit component on a substrate, and more particularly to a fixing component and a component fixing structure for mounting a circuit component on a substrate having mounting holes.

Conventionally, on a printed circuit board as a substrate, when mounting the inductance component as a circuit component, to accommodate the inductor component to a fixed part, it was attached by fixing the mounting bracket to the printed circuit board (for example, Patent Document 1).

Thus, the case where a fixing component is fixed to a printed circuit board is demonstrated with reference to FIGS. The fixed component 101 is formed by appropriately bending a plate-like member, and includes a frame main body 103 that grips a transformer 102 as an inductance component from both left and right sides, a stopper portion 105 that contacts one side surface of the printed circuit board 104, and a wedge shape The engaging claw 106 is provided. In addition, a rectangular mounting hole 107 into which the frame main body 103 is inserted and an engagement hole 108 into which the engaging claw 106 is inserted around the mounting hole 107 are formed in the printed circuit board 104 in advance. Then, the engaging claw 106 is aligned with the position of the engaging hole 108, the fixed part 101 is inserted into the mounting hole 107, and the stopper 105 comes into contact with one surface of the printed circuit board 104, and at the same time, the engaging claw 106 is engaged. The fixing component 101 is fixed to the printed circuit board 104 by engaging with the joint hole 108.
JP 2002-246235 A

However, since the engagement hole 108 is formed in a small slit shape according to the shape of the engagement claw 106, it is difficult not only to align the engagement claw 106 with the position of the engagement hole 108, but also to the frame. While inserting the main body 103 into the mounting hole 107, it is difficult to simultaneously insert the engaging claw 106 into the engaging hole 108, and there is a problem that the number of work steps for mounting the transformer 102 to the printed circuit board 104 increases.

In view of the above problems, an object of the present invention is to provide a fixing component and a component fixing structure capable of easily attaching a circuit component to a substrate.

To achieve the above object, the invention according to claim 1, in the fixed part comprising a frame body for holding the circuit part, and a fixing means for fixing the frame body into a mounting hole formed in advance on the substrate, the frame body, wherein comprises a bottom portion inserted into the mounting hole, and a side surface portion which is rising formed from a pair of short sides of the bottom portion, said fixing means, rising from a pair of long sides of the bottom portion Formed on the formed standing portion and the upper end of the standing portion, and when the bottom surface portion of the frame body is inserted into the mounting hole from one side of the substrate, contacts the one side surface of the substrate and the stopper portion is integrally formed on the erected portion, when the stopper portion is brought into contact with one surface of the substrate, the other side that is bent to engage the surface plastically deformable engagement of said substrate and locking piece, characterized in Tona Rukoto.

  According to a second aspect of the present invention, in the first aspect, the locking piece includes an inclined surface at one end contacting the other surface of the substrate.

  The invention according to claim 3 is the invention according to claim 2, wherein the length of the locking piece between the base end of the locking piece and the one side surface of the stopper portion that contacts the substrate is as follows: It is formed at a position having a length shorter than the thickness of the substrate.

According to a fourth aspect of the present invention, in any one of the first to third aspects, the bottom surface portion is a portion on which the circuit component is placed .

The invention according to claim 5 is characterized in that the fixing component according to any one of claims 1 to 4 is fixed to the substrate .

According to the fixing component of the first aspect of the present invention, after the frame body is inserted into the mounting hole, the locking piece is bent and the locking piece is engaged with the other surface of the substrate to fix the fixing component to the substrate. Therefore, since there is no need to align the engaging claw with the position of the engaging hole as in the prior art, the circuit component can be easily attached to the board.

The fixing means, conventional no engaging claws so, further engaging piece, because it is integrally formed on the standing portion to form the outer shape of the frame body, mounting the bottom portion of the frame body The frame body can be inserted into the mounting hole simply by positioning in the hole. Therefore, since there is no need to match the engaging claw to the position of the engaging hole as in the prior art, the bottom surface of the frame body can be inserted into the mounting hole much more easily than in the prior art.

In addition, according to the fixing component of the second aspect, the tip of the locking piece does not interfere with the substrate, so that the locking piece can be easily bent.

Further, according to the fixing component of the third aspect, at the proximal end side, one end of the locking piece can be reliably engaged with the other surface of the printed circuit board.

Moreover, according to the fixed component of Claim 4, a circuit component can be hold | maintained reliably .

According to the component fixing structure of the fifth aspect, the circuit component can be easily attached to the substrate .

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

A fixing component 1 shown in FIG. 1 includes a frame body 3 that holds an inductance component as a circuit component, for example, a transformer 2 in this embodiment, and a fixing means 4, and a mounting hole 5 is previously drilled as a whole. An inductance component can be attached to a printed circuit board 6 as a substrate.

  Although the transformer 2 is not particularly limited, in the present embodiment, the transformer 2 includes a core 7, a primary winding 8, and a secondary winding 9. The transformer 2 generates and changes a magnetic flux passing through the core 7 by passing a current intermittently through the primary winding 8 as a whole. The magnetic flux generated and changed in this way is linked to the secondary winding 9 so that a voltage can be induced on the secondary winding 9, that is, the secondary side of the transformer 2.

  The core 7 is made of a high magnetic permeability member such as an iron core or a ferrite core 7, and includes a cylindrical leg portion 10. The primary winding 8 is made of a three-layer insulated wire similar to the conventional one, and includes a coil portion formed by winding the wire several times in order in the radial direction. The coil portion of the primary winding 8 is wound around the leg portion 10 of the core 7. The secondary winding 9 is formed from a flat plate-like metal plate material such as a copper plate. In addition, an insulating plate (not shown) is provided in the middle of the primary winding 8. The secondary winding 9 has a through hole 12 through which the leg portion 10 of the core 7 is inserted, is arranged so as to sandwich the primary winding 8 in a sandwich shape, and is integrated with a bolt 13. The transformer 2 configured as described above is installed in a direction in which the central axis of the leg portion 10 of the core 7 is in the vertical direction.

The mounting hole 5 formed in the printed circuit board 6 has a rectangular shape so that the rectangular fixed component 1 can be inserted in a plan view. Incidentally, as will be described later, the fixing means 4 does not have an engaging claw as in the prior art, and therefore it is not necessary to form an engaging hole for inserting the engaging claw around the mounting hole 5.

The fixed component 1 shown in FIG. 2 is integrally formed by bending a substantially rectangular plate-like member having a spring property of a metal such as copper or aluminum by appropriately pressing. The frame body 3 includes a bottom surface portion 20, a side surface portion 21, and fixing means 4. The bottom surface portion 20 has a rectangular shape corresponding to the planar shape of the transformer 2, and the side surface portions 21 are vertically formed on a pair of short sides of the bottom surface portion 20. The length of the side surface portion 21 in the height direction is formed to be approximately equal to the length of the transformer 2 in the height direction.

The fixing means 4 are formed on a pair of long sides of the bottom surface portion 20, respectively. Hereinafter, the structure of the fixing means 4 which is a characteristic structure of the present invention will be described in detail. The fixing means 4 includes stopper portions 22, 22, 22 and locking pieces 23, 23, 23, 23, and is configured to hold the printed circuit board 6 and fix the frame body 3 to the printed circuit board 6. Yes. On the long side of the bottom surface portion 20, an upright portion 24 is vertically formed, and the upper end of the upright portion 24 is bent outward at a right angle to form stopper portions 22,.

  As shown in FIG. 3, one of the pair of long sides is formed with two short stopper portions 22 at both ends, a total of two, and the other of the pair of long sides is a long stopper portion 22. Is formed at the center.

Further, both end and a bottom portion 20 and the notch 25 in the joint portion of the standing portion 24, ..., by providing the 25, locking pieces 23, ..., 23 standing constituting the width direction of the outer shape of the frame body 3 It is formed integrally with the installation part 24. Therefore, the locking pieces 23,..., 23 are provided at the four corners that are the corners of the bottom surface portion 20, and are formed so that the tips are located outside the length direction of the bottom surface portion 20.

  As shown in FIG. 4, the locking pieces 23,..., 23 are projected on the extension line of the longitudinal end portion of the standing portion 24, and are formed to be plastically deformable with the base end 23 </ b> A as a fulcrum. Yes. Further, the locking pieces 23,..., 23 are provided with an inclined surface 26A at an upper end 26 as one end that comes into contact with the other side surface (not shown in the figure) of the printed board 6. The inclined surface 26A is inclined downward as it goes from the proximal end side to the distal end side of the locking pieces 23,... 23, and is connected to the horizontal surfaces 26B and 26C at both the proximal end side and the distal end side of the inclined surface 26A. . The locking pieces 23,..., 23 are on the base end 23A side of the locking pieces 23,..., 23 as the base ends of the locking pieces 23, ..., 23 of the horizontal surfaces 26B, 26C connected to the inclined surface 26A. The length L between the horizontal surface 26B and the one side surface 22A of the stopper portions 22,... 22 that contacts the printed circuit board 6 is shorter than the thickness T of the printed circuit board 6. . Moreover, the corner | angular of the front-end | tip lower side of the locking pieces 23 ... 23 is formed in R shape.

Next, a method for attaching the transformer 2 to the printed circuit board 6 will be described. First, the transformer 2 in which the primary winding 8 and the secondary winding 9 are assembled to the core 7 is placed on the bottom surface portion 20 of the frame body 3 so that the central axis of the leg portion 10 of the core 7 is in the vertical direction. It is held between the side surface portion 21 and the standing portion 24. In this way, the fixed component 1 holds the transformer 2.

Next, the fixed component 1 holding the transformer 2 inserts the frame main body 3 from the bottom surface portion 20 into the mounting hole 5 previously formed in the printed circuit board 6. Here, the fixing means 4 which is a characteristic configuration of the present embodiment does not have an engaging claw as in the prior art, and the locking pieces 23,..., 23 are in the width direction of the frame body 3 in plan view. because it is integrally formed on the extension of the standing portion 24 constituting the outer shape, the insertion of the frame body 3 into the mounting hole 5 by simply positioning the bottom portion 20 of the frame body 3 into the mounting hole 5 it can. Accordingly, since it is not necessary to align the engaging claw with the position of the engaging hole as in the prior art, the bottom surface portion 20 of the frame body 3 can be inserted into the mounting hole 5 much more easily than in the prior art.

The fixed component 1 is inserted until the stopper portions 22,..., 22 of the frame main body 3 come into contact with the one side surface 6A of the printed circuit board 6. Here, each of the stopper portions 22, ..., 22 has a short stopper portion 22 formed at one end of each of the pair of long sides, and a long stopper portion at the other end of the pair of long sides. One 22 is formed in the center. Accordingly, since the fixed component 1 positions the fixed component 1 in the vertical direction with respect to the printed circuit board 6 at three locations, rattling between the frame main body 3 and the one side surface 6A of the printed circuit board 6 can be prevented. it can.

After the fixed parts 1 are inserted until the stopper portions 22,..., 22 of the frame body 3 come into contact with the one side surface 6A of the printed circuit board 6, as shown in FIG. The engaging pieces 23,..., 23 are engaged with the other surface 6B of the printed circuit board 6 by bending the engaging pieces 23,. In this way, the fixed component 1 fixes the frame body 3 to the printed circuit board 6 by holding the printed circuit board 6 between the stopper portions 22,... 22 and the locking pieces 23,.

Here, in order to bend the locking pieces 23,..., 23, a known pliers (not shown) can be used. Further, in the fixing part 1 according to the present embodiment, the locking pieces 23,. The four corners as the corners of the bottom part 20 are formed so that the tips are located outside. Therefore, the latching pieces 23,..., 23 can be easily gripped with pliers without interfering with the frame body 3 such as the bottom surface portion 20, so that the latching pieces 23,. 23 can be folded.

In addition, the fixing component 1 goes from the proximal end side to the distal end side of the locking pieces 23,... 23 at the upper end as one end where the locking pieces 23,. Accordingly, an inclined surface 26A inclined downward is provided. Thereby, since the front ends of the locking pieces 23,... 23 do not interfere with the printed circuit board 6, the fixing component 1 can be easily bent using the base end 23 A as a fulcrum. it can.

Further, the fixed component 1 includes a horizontal plane 26B on the base end 23A side of the locking pieces 23,..., 23 of the horizontal planes 26B, 26C connected to the inclined surface 26A and a printed circuit board of the stopper portions 22,. 6 is formed so that a length L between the one side surface 22A contacting with 6 is shorter than a thickness T of the printed circuit board 6. Thereby, the one end 26 of the locking pieces 23, ..., 23 can be reliably engaged with the other surface 6B of the printed circuit board 6 on the base end 23A side.

In addition, the fixed component 1 prevents the locking pieces 23,... 23 from being caught on the inner edge of the mounting hole 5 by forming the corners on the lower ends of the locking pieces 23,. Therefore, the frame body 3 can be easily inserted into the mounting hole 5.

Further, in the fixing component 1, the frame main body 3 is securely fixed to the printed circuit board 6 by bending the locking pieces 23,..., 23 and engaging with the other surface 6B of the printed circuit board 6. There is no need to attach it.

  The present invention is not limited to this embodiment, and various modifications can be made within the scope of the gist of the present invention. For example, in the above-described embodiment, the case where the substrate is the printed circuit board 6 has been described. However, the present invention is not limited to this, and the substrate may be a simple plate member.

  In the above-described embodiment, the case where the inductance component as the circuit component is the transformer 2 has been described. However, other inductance components having a core 7 such as a choke coil may be used.

It is a perspective view which shows the use condition of the fixing component which concerns on this embodiment, and is a figure which shows the state before attachment. It is a perspective view which shows the structure of the fixing component which concerns on this embodiment. It is a top view same as the above. It is a partial enlarged view which shows the structure of a locking piece same as the above. It is the perspective view seen from the bottom which shows use condition same as the above, and is a figure which shows the attached state in steps. It is a perspective view which shows the use condition of the fixing component which concerns on a prior art example, and is a figure which shows the state before attachment. It is a perspective view which shows the structure of the fixing component which concerns on a prior art example. It is the perspective view seen from the bottom which shows use condition same as the above, and is a figure which shows the attached state.

1 Fixed component 2 Transformer (circuit component)
3 Frame body 4 Fixing means 5 Mounting hole 6 Printed circuit board (board)
6A One side surface
6B Other side surface
20 Bottom
22 Stopper section
23 Locking piece
23A proximal
24 Standing part
26A inclined surface
26 One end L Length T Substrate thickness

Claims (5)

In the fixed part comprising a frame body for holding the circuit part, and a fixing means for fixing the frame body into a mounting hole formed in advance on a substrate,
The frame body includes a bottom portion inserted into the mounting hole, and a start-up formed side portions of a pair of short sides of the bottom portion,
The fixing means is formed at an upright portion formed up from a pair of long sides of the bottom surface portion and an upper end of the upright portion, and the bottom surface portion of the frame body is attached from one side of the substrate. A stopper part that abuts on one side surface of the substrate when inserted into the hole, and an integral part of the standing portion, and the stopper part abuts on the one side surface of the substrate, a plastically deformable engaging pieces that are bent to engage the side surface, a fixed part, characterized in Tona Rukoto. The fixed part according to claim 1, wherein the locking piece includes an inclined surface at one end contacting the other surface of the substrate. The locking piece is formed at a position where the length between the base end of the locking piece and the one side surface of the stopper portion that contacts the substrate is shorter than the thickness of the substrate. The fixed part according to claim 2, wherein Before Symbol bottom portion, the fixed part according to any one of claims 1 to 3, characterized in that a portion for mounting the circuit component. A component fixing structure, wherein the fixed component according to any one of claims 1 to 4 is fixed to the substrate.