JP5444161B2 - Electronics - Google Patents

Description

  The present invention relates to an electronic device, and more particularly to an electronic device provided with a metal cover.

  For example, some electronic devices in which high-frequency electronic components are mounted on a circuit board have a metal shield cover that covers the electronic components. The shield cover is usually fixed to the circuit board using solder. In this state, the shield cover protects the electronic components and at the same time functions as a noise countermeasure by being grounded to the circuit on the board. In order for such a shield cover to perform its function sufficiently, it needs to be securely fixed to the circuit board both electrically and mechanically.

  As a method of fixing the shield cover to the circuit board, mounting legs are formed on the shield cover (frame), the mounting legs are inserted into the through holes of the circuit board, and soldering is performed with the mounting legs inserted into the through holes. (For example, refer to Patent Document 1). In this prior art, a convex part which protrudes in the direction which mutually faces is formed in a pair of attachment leg, and the convex part bites into the wall surface of a through-hole, and prevents it from coming off.

  According to this prior art, while preventing the shield cover from being removed by the protrusions formed on the pair of mounting legs, the circuit board and the shield cover are soldered with the mounting legs inserted into the through holes. Since it is fixed, it is considered that the circuit board and the shield cover can be firmly joined.

Japanese Patent Laid-Open No. 2006-27862

  The above prior art is to firmly fix the shield cover by the convex portions formed on the mounting legs and soldering, but at this time, there are the following two problems.

[First problem]
The first problem is a problem that the shield cover is lifted or dropped.
Although depending on the circumstances at the time of mounting, for example, during the assembly of the electronic device, the electronic device may be turned upside down, and the shield cover may be lifted or disengaged at some moment. In addition, when mounting a new electronic component on the back side of an electronic device, the electronic device may be turned upside down and placed in a reflow furnace (secondary reflow), but the shield cover is fixed by heating in the furnace. The solder that has been melted may cause the shield cover to float or fall off.

[Second problem]
The second problem is a problem during the assembly process.
Inversely to the miniaturization of products, the number of individual electronic devices made from a single collective board has increased, and because of the miniaturization, the number of shield covers that are simultaneously press-fitted to the collective board has also increased. Yes. As the number of shield covers that are simultaneously press-fitted into the collective substrate increases, the press-fitting equipment that press-fits the shield cover, for example, the cylinder used in the press-fitting equipment, has to press-fit many shield covers at a stretch, so that is much larger. Requires power.

  However, because there is a limit to the force that can be applied to the cylinder (power to be exerted), it is not possible to press-fit an unlimited number of shield covers due to problems such as insufficient power. There was a situation where the number of pieces had to be limited. For this reason, it is difficult to reduce the manufacturing cost even if the product is downsized.

  In order to promote mass production, if a number of shield covers close to the limit allowed by the cylinder are press-fitted into the collective board, the load during press-fitting will become too large and stress will also be applied to the collective board during press-fitting. There is also concern about stress on electronic components (mounted components) and soldered parts.

  Accordingly, an object of the present invention is to provide a technique capable of reducing the load when the cover is press-fitted while preventing the cover from being lifted, and still stably producing high-quality electronic equipment.

In order to solve the above problems, the present invention employs the following solutions.
An electronic apparatus (an electronic circuit module, an electronic circuit unit, a high-frequency module, etc.) of the present invention includes an insulating substrate on which electronic components are mounted, and a metal cover that covers the insulating substrate.

  Here, the cover includes a rectangular top plate, first to fourth side plates provided in contact with each side of the top plate, first and second claws provided on the first side plate, And a third claw provided on the third side plate facing the one side plate. And the 2nd nail | claw and the 3rd nail | claw are provided on the diagonal of the top plate, or its vicinity.

  The insulating substrate includes a first hole into which the first claw is inserted, a second hole into which the second claw is inserted, and a third hole into which the third claw is inserted. Yes.

  And in the electronic device of this invention, the said subject is solved by prescribing the amount of biting of each nail | claw. That is, in the present invention, the amount of biting into the side walls of the second and third holes by the second and third claws being inserted into the second and third holes is as follows. The first claw is inserted into the first hole, so that the first claw is larger than the amount of biting into the side wall of the first hole.

  In short, the second and third claws bite into the side walls of each hole more than the first claws. Therefore, it is possible to prevent the cover from being lifted by the second and third claws having a large (large) bite amount. On the other hand, at the time of press-fitting, appropriate pressure input is required for the second and third claws, but since the amount of biting is reduced for the first claws, the second and third claws are pressed as much as possible. Does not require input. Thereby, the pressure input as the whole cover can be reduced.

  Further, as the number of covers simultaneously press-fitted to the collective substrate increases, the pressure input for the first claw can be reduced, so that more electronic components can be added to the surface by the amount of the reduced pressure input. It becomes possible to manufacture by attaching, and the manufacturing cost can also be reduced.

  Furthermore, by reducing the pressure input, the stress on the electronic component and the soldering part is reduced, and high quality electronic equipment can be stably produced.

  As a configuration of the electronic device of the present invention, the third side plate includes a fourth claw, the first claw and the fourth claw are provided on or near the diagonal of the top plate, and the insulating substrate is The fourth claw has a fourth hole into which the fourth claw is inserted, and the second and third claw are inserted into the second and third holes, so that the second and third claw are second and third. The amount of biting into the side wall of the first hole is determined by inserting the first and fourth claws into the first and fourth holes, so that the first and fourth claws move into the side walls of the first and fourth holes. It is preferable that it is larger than the amount of biting.

  In this invention, the 4th nail | claw and the 4th hole are newly added, and the 1st nail | claw and the 4th nail | claw are provided on the diagonal of the top plate, or its vicinity. And in this invention, the 2nd and 3rd nail | claw bites into the side wall of each hole more largely than the 1st and 4th nail | claw.

  Therefore, according to the present invention, the cover is supported by the four claws, so that in addition to the above-described effects of the invention, the cover is more stably supported by the four claws, and the problem such as the lifting of the cover can be more reliably performed. Can be prevented.

  As a configuration of the electronic device of the present invention, each claw includes a convex portion protruding in the direction of biting into the side wall of each hole, and the convex portions of the first and second claws protrude from the inside to each other or from the outside to each other. The protrusion of the nail protrudes in the opposite direction to the second nail, and the protrusion of the protrusion of the second nail and the third nail is larger than the protrusion of the protrusion of the first nail. Is preferred.

  According to this invention, since the protruding amount of the convex portions of the second and third claws is larger than the protruding amount of the convex portions of the first claws, the second and third claws The pressure input of the first nail can be reduced while the cover is firmly fixed. Moreover, the said subject can be solved with the simple structure which only provides the convex part from which protrusion amount differs.

  As a configuration of the electronic device of the present invention, each claw includes a convex portion protruding in the direction of biting into the side wall of each hole, and the convex portions of the first and second claws protrude from the inside to each other or from the outside to each other. And the convex part of the 4th nail protrudes inside or outside, and the protrusion amount of the convex part of the 2nd nail and the 3rd nail is the convex part of the 1st nail and the 4th nail. It is preferable that it is larger than the protruding amount.

  According to this invention, since the protrusion amount of the convex part of the 2nd and 3rd nail | claw is made larger than the protrusion amount of the convex part of the 1st and 4th nail | claw, The pressure input of the first and fourth claws can be reduced while the cover is firmly fixed by the third claws. Moreover, the said subject can be solved with the simple structure which only provides the convex part from which protrusion amount differs in four nail | claws.

  As a configuration of the electronic apparatus of the present invention, it is preferable that the amount of biting is adjusted by shifting the relative positional relationship between each nail and each hole.

  According to this invention, the amount of biting can be adjusted by shifting the relative positional relationship between each claw and each hole. For example, the amount of biting can be changed by making all the claws have the same shape and appropriately shifting the positions of the holes into which the claws are inserted. For example, if the position of the nail and the position of the hole are not shifted so much, the nail is inserted into the hole relatively smoothly, so that the amount of biting is small. On the other hand, if the position of the nail and the position of the hole are greatly shifted, the nail becomes difficult to be inserted into the hole, and the amount of biting is increased accordingly.

  As a configuration of the electronic apparatus of the present invention, the amount of biting is preferably adjusted by changing the size of each nail or the size of each hole.

  According to the present invention, the amount of biting can be adjusted by changing the size of each nail or the size of each hole. For example, when the size of the hole is constant, if the nail is enlarged, the nail becomes difficult to be inserted into the hole as much, and the amount of biting increases if it is pushed forcefully. On the contrary, if the nail is made small, the small nail is easy to enter the hole, so the amount of biting becomes small.

  Further, if the size (diameter) of the hole is reduced while keeping the size of the nail as it is, the nail becomes difficult to enter the hole, and the amount of biting increases. On the other hand, if the size of the nail is made constant while the size of the hole is increased, the nail is likely to enter the hole, thereby reducing the amount of biting. Therefore, the amount of biting can be adjusted as appropriate by changing the size of each nail or the size of each hole.

  According to the present invention, among the at least three claws formed on the cover, the cover is firmly fixed by the two claws that are arranged diagonally and have a large bite amount, so that the cover can be prevented from being lifted. it can. In addition, since the pressure input can be reduced by the remaining nail having a small bite-in amount, more electronic parts can be manufactured with multiple faces.

1 is an exploded perspective view schematically showing an overall configuration of an electronic device 10 according to a first embodiment of the present invention. It is the perspective view which turned over and showed the shield cover 30. FIG. 2 is a perspective view showing a completed state of the electronic device 10. FIG. It is sectional drawing of the electronic device 10 which follows the IV-IV line | wire in FIG. It is sectional drawing of the electronic device 10 which follows the VV line | wire in FIG. It is an enlarged view which expands and shows the (A) (B) part of FIG. It is a figure which shows typically the mode of each nail | claw and each hole after the press injection of the electronic device 10 which concerns on 1st Embodiment. It is a disassembled perspective view which shows roughly the whole structure of 10 A of electronic devices of a comparative example. It is a figure which shows typically the mode of each nail | claw and each hole after press injection of the electronic device 10A of a comparative example. It is a disassembled perspective view which shows the electronic device which concerns on 2nd Embodiment of this invention. It is a figure which shows typically the mode of each nail | claw and each hole after press injection of the electronic device 10-2 which concerns on 2nd Embodiment. It is a disassembled perspective view which shows the electronic device which concerns on 3rd Embodiment of this invention. It is a figure which shows typically the mode of each nail | claw and each hole after press injection of the electronic device 10-3 which concerns on 3rd Embodiment. It is a disassembled perspective view which shows the electronic device which concerns on 4th Embodiment of this invention. It is a figure which shows typically the mode of each nail | claw and each hole after press injection of the electronic device 10-4 which concerns on 4th Embodiment. It is a disassembled perspective view which shows the electronic device which concerns on 5th Embodiment of this invention. It is a figure which shows typically the mode of each nail | claw and each hole after press-fitting of the electronic device 10-5 which concerns on 5th Embodiment. It is a figure shown about the shield cover of the electronic device which concerns on the modification of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
FIG. 1 is an exploded perspective view schematically showing an overall configuration of an electronic apparatus 10 according to the first embodiment of the present invention.
The electronic device 10 is, for example, a high-frequency module (unit) having a high-frequency band wireless communication function (wireless LAN, Bluetooth: registered trademark). Such an electronic device 10 is used in, for example, a portable information terminal or a notebook personal computer. Built-in.

[Circuit board]
The electronic device 10 has a circuit board (insulating board) 12, and an electric circuit (not shown) is formed on the circuit board 12. For this reason, a wiring pattern (not shown) is provided on the mounting surface 12 a of the circuit board 12. The circuit board 12 may have a multilayer structure. In that case, a wiring pattern is also provided on the inner layer of the circuit board 12.

[Electronic parts]
A plurality of electronic components 14, 16, 18, 19, etc. are mounted (mounted) on the mounting surface 12 a of the circuit board 12. Here, only a limited number of electronic components 14 to 19 are shown in order to prevent complication of the drawing, but other electronic components are also mounted on the mounting surface 12a, and these are to some extent. It is arranged in a dense state.

  Examples of the electronic components 14 to 19 to be mounted include passive elements such as a high-frequency chip or FET array packaged with an integrated circuit, a chip resistor, a chip coil, or a chip capacitor. Good. Among these, the relatively large electronic components 14 and 16 are, for example, surface mount type package components, and the outer shape thereof is a flat rectangular parallelepiped shape. These electronic components 14 to 19 are mounted on the circuit board 12 via, for example, solder bumps provided in advance on the bottom surface (not shown in FIG. 1). The electronic components 14 and 16 are components that occupy a large area on the mounting surface 12a among components to be mounted, and have a relatively upper back (mounting height) when viewed on the mounting surface 12a.

[Hole]
A hole 20 is formed at a corner position (corner position) of the circuit board 12. The hole 20 is a cylindrical through hole, and is provided through the circuit board 12 in the thickness direction. On the inner wall surface of the hole 20, for example, a conductive layer (no reference symbol) is formed by a conductive paste or conductive plating. The conductive layer is connected to a ground (GND) of an electric circuit (not shown), for example.

  Four holes 20 are formed in the circuit board 12. More specifically, the circuit board 12 includes a first hole 21 into which the first claw 61 is inserted, a second hole 22 into which the second claw 62 is inserted, and a third claw 63 (see FIG. 2). ) And the fourth hole 24 into which the fourth claw 64 (see FIG. 2) is inserted. The first to fourth claws 61 to 64 will be described later.

[Shield cover]
The electronic device 10 has a shield cover 30. The shield cover 30 is disposed so as to cover the electronic components 14 to 19 (including other electronic components) on the mounting surface 12a of the circuit board 12 when the electronic device 10 is completed, and mechanically covers the electronic components 14 to 19. And electrical protection (blocking noise from outside and preventing radiation of unwanted radio waves to the outside).

  The shield cover 30 is formed by pressing a metal plate. The shape of the shield cover 30 is a substantially half-box shape with the lower end surface entirely opened in the state shown in FIG.

FIG. 2 is a perspective view showing the shield cover 30 upside down.
The shield cover 30 includes a rectangular top plate 40 facing the mounting surface 12a (see FIG. 1), and also includes a side plate 50 and a claw 60.
[Top plate, side plate]
The top plate 40 is a substantially rectangular plate-shaped member.
The side plate 50 is connected to the four sides of the periphery of the top plate 40 and is bent substantially perpendicular to the top plate 40. The side plate 50 is composed of four side plates from a first side plate 51 to a fourth side plate 54. In FIG. 2, there is a first side plate 51 on the right side in the drawing, and a second side plate 52, a third side plate 53, and a fourth side plate 54 are arranged in this order counterclockwise.

〔claw〕
The claw 60 is a mounting leg portion that is inserted into the hole 20 (see FIG. 1) of the circuit board 12. In this embodiment, the claw 60 is composed of four claws from the first claw 61 to the fourth claw 64. ing.
The first and second claws 61, 62 are provided at both side edges of the first side plate 51, and the third and fourth claws 63, 64 are the third side plate 53 facing the first side plate 51. Are provided on both side edges. Each nail | claw 60 (61-64) protrudes toward the upper direction in FIG.

  The first claw 61 and the fourth claw 64 are provided on the diagonal line of the top plate 40, and the second claw 62 and the third claw 63 are provided on the diagonal line of the top plate 40. Yes. Note that even on the diagonal line, it is not necessary to form each claw on the diagonal line of the top board 40 in a strict sense, and the first claw 61, the fourth claw 64, and the second claw 62 It is only necessary that the third claw 63 is disposed diagonally with respect to the four corners of the top plate 40.

  Each nail | claw 60 (61-64) is provided with the convex part 70 (71, 72) protruded in the direction which bites into the side wall of each hole 20 (21-24) shown in FIG. More specifically, the convex portions 71 and 72 of the first and second claws 61 and 62 protrude to face each other inside the shield cover 30, and the convex portions 71 and 72 of the third and fourth claws 63 and 64. Projecting from each other inside the shield cover 30 to face each other. In the present embodiment, the circuit board 12 is sandwiched and fixed by forming such convex portions facing each other.

  And the protrusion amount of the convex part 72 of the 2nd nail | claw 62 and the 3rd nail | claw 63 is larger than the protrusion amount of the convex part 71 of the 1st nail | claw 61 and the 4th nail | claw 64. Here, the protrusion amount is a value indicating the degree of protrusion of the protrusion, and is a value indicating how much each protrusion protrudes from the root. If the amount of protrusion is large, it indicates that the convex portion protrudes that much, and if the amount of protrusion is small, it indicates that the convex portion does not protrude so much.

  In the present embodiment, the protruding amount of the convex portion 72 of the second claw 62 and the third claw 63 is larger than the protruding amount of the convex portion 71 of the first claw 61 and the fourth claw 64. The convex portion 72 of the second claw 62 and the third claw 63 protrudes from the convex portion 71 of the first claw 61 and the fourth claw 64.

  Returning to FIG. 1, a first claw 61 and a second claw 62 are formed on the first side plate 51 of the shield cover 30. 1 shows only the two claws 61 and 62 formed on the first side plate 51 on the near side, the third side plate 53 located on the back side in FIG. Two claws 63 and 64 are formed at the same position.

  These four claws 61 to 64 are located corresponding to the four corners of the circuit board 12, respectively, and these four claws 61 to 64 are both edge portions of the first side plate 51 and the third side plate 53. Projecting toward the circuit board 12 (downward in FIG. 1). As indicated by the alternate long and short dash line in FIG. 1, the four claws 61 to 64 are respectively inserted into the holes 21 to 24 at the corresponding positions in a state where the shield cover 30 is attached to the circuit board 12.

[Nail press fit]
FIG. 3 is a perspective view showing a completed state of the electronic device 10.
In a state where the shield cover 30 is installed on the circuit board 12, the four claws 61 to 64 are inserted into the corresponding holes 21 to 24, respectively. In FIG. 3, the claws 63 and 64 and the holes 23 and 24 are not shown. At this time, in the holes 21 to 24, the four claws 61 to 64 are pressure-bonded to the conductive layer, whereby the conductive layer and the shield cover 30 are electrically connected. The shield cover 30 is connected to a ground (GND) of an electric circuit (not shown).

Next, the internal structure of the electronic device 10 according to the first embodiment will be described.
FIG. 4 is a cross-sectional view of the electronic device 10 taken along line IV-IV in FIG. In FIG. 4, the dimensions of each part are exaggerated in order to facilitate understanding of the internal structure of the electronic device 10 and the arrangement relationship of each part.

As shown in FIG. 4, the electronic components 14 and 16 are disposed inside the shield cover 30. The electronic components 14 and 16 are soldered on the bottom surfaces by solders 14a and 16a such as solder bumps, respectively.
A fixed gap (clearance) is provided between the top plate 40 of the shield cover 30 and the electronic components 14 and 16. This gap is a space for preventing contact with the electronic components 14 and 16 when the top plate 40 is recessed.
The first side plate 51 and the third side plate 53 extend from the top plate 40 toward the circuit board 12 and are in contact with the circuit board 12.

FIG. 5 is a cross-sectional view of the electronic apparatus 10 taken along line VV in FIG.
As shown in FIG. 5, with the shield cover 30 installed on the circuit board 12, the first claw 61 is inserted into the first hole 21 and the second claw 62 is inserted into the second hole 22. ing. In the first and second holes 21 and 22, the claws 61 and 62 are connected to a conductive layer (not shown) in the holes, so that the conductive layer and the shield cover 30 are electrically connected. . The circuit board 12 and the claws 61 and 62 are fixed by being soldered in a state where the first and second claws 61 and 62 are inserted into the first and second holes 21 and 22. Although not shown in the drawing, the third and fourth claws 63 and 64 on the opposite side are similarly soldered in a state of being inserted into the third and fourth holes 23 and 24. Fixed.

FIG. 6 is an enlarged view showing the (A) and (B) portions of FIG.
As shown in FIG. 6A, the convex portion 72 of the second claw 62 bites into the side wall of the second hole 22 greatly.
As shown in FIG. 6B, the convex portion 71 of the first claw 61 slightly bites into the side wall of the first hole 21. Here, the extent to which the convex portion 71 of the first claw 61 bites into the side wall of the first hole 21 is determined depending on the design and specifications, and the material and material of the shield cover 30 and the circuit board 12. Although it can be changed, at least, the convex portion 71 of the first claw 61 is made to bite smaller than the convex portion 72 of the second claw 62, and the convex portion 71 of the first claw 61 is almost It is more preferable to contact the side wall of the first hole 21 without biting.

  At the time of press-fitting, each claw is inserted while the convex part of each claw is shaving the circuit board 12 (side wall of each hole). Therefore, a certain amount of load is required at the time of press-fitting, but the convex part 71 of the first claw 61 is temporarily assumed. If the amount of biting is reduced as much as the amount of biting of the convex portion 72 of the second claw 62, the pressure input of the entire shield cover 30 can be reduced. Further, if the amount of biting of the convex portion 71 of the first claw 61 is made substantially zero (to the extent that it touches the side wall), substantially only a force for biting the convex portion 72 of the second claw 62 is necessary. Therefore, the pressure input of the entire shield cover 30 can be reduced to about half.

  FIG. 7 is a diagram schematically illustrating the state of each nail and each hole after press-fitting of the electronic device 10 according to the first embodiment. In this figure, only the nail and the hole are schematically shown, and the arrangement relationship between the nail and the hole when the electronic device 10 is viewed from directly above is shown. In addition, since the nails and holes in the drawing conceptually show a positional relationship, the dimensions and the like are exaggerated to some extent.

  In this figure, a circular display represents a hole, and a square display represents a nail. If the square display protrudes from the circular display, it indicates that the nail is biting into the side wall of the hole, and if the square display is inscribed in the circular display, the nail is in contact with the side wall of the hole ( Or it bites in a little). In addition, about these points, it is the same also about the conceptual schematic diagram which appears below.

  As shown in FIG. 7A, the second and third claws 62 and 63 bite into the side walls of the second and third holes 22 and 23. The first and fourth claws 61 and 64 are in contact with the side walls of the first and fourth holes 21 and 24.

  As described above, the second and third claws 62 and 63 are inserted into the second and third holes 22 and 23, so that the second and third claws 62 and 63 are inserted into the second and third holes. The amount of biting into the side walls 22 and 23 is such that the first and fourth claws 61 and 64 are inserted into the first and fourth holes 21 and 24 so that the first and fourth claws 61 and 64 are inserted. It is larger than the amount of biting into the side walls of the first and fourth holes 21 and 24. Here, the biting amount is a value indicating how much each nail (including the convex portion) bites into the side wall of each hole, and indicates that if the biting amount is large, the bite is deeper and deeper. If the amount is small, it indicates that you have not eaten up much.

  At this time, regarding the first and fourth claws 61 and 64, in order to further reduce the pressure input, it is conceivable to use straight claws that do not form the convex portion 71 (see FIG. 2). However, if such straight claws are used, the shield cover 30 rotates after press-fitting, the effect of the convex portions 72 of the second and third claws 62 and 63 is lost, and the shield cover 30 rises. There is a risk that. Accordingly, the first and fourth claws 61 and 64 are not simply straight claws but are provided with slight convex portions 71 that are slightly in contact with the side walls of the first and fourth holes 21 and 24. It is valid. Thereby, while being able to reduce the load at the time of press fit, it becomes possible to prevent rotation of the shield cover 30, and the effect of each nail | claw press-fit is demonstrated appropriately.

  Here, in FIG. 7A, the second and third claws 62 and 63 having a large bite amount are arranged on a diagonal line, but as shown in FIG. It is also conceivable that the third claws 62 and 63 are arranged not vertically on the diagonal line but arranged vertically. However, in this case, the first and fourth holes 21 and 24 side (the right side in the figure) of the shield cover 30 are lifted (lifted) during press-fitting, which is not preferable in manufacturing. Therefore, in order to prevent such lifting, in the present embodiment, as shown in FIG. 7A, the second and third claws 62 and 63 having a large bite amount are arranged on a diagonal line. .

[Comparative example]
8 and 9 are diagrams showing an electronic apparatus 10A of a comparative example. FIG. 8 is an exploded perspective view schematically showing the overall configuration of the electronic apparatus 10A of the comparative example. FIG. 9 is a diagram schematically showing the state of each nail and each hole after press-fitting the electronic device 10A of the comparative example.

  As shown in FIG. 8, the electronic device 10A of the comparative example has four claws 60A as in the first embodiment, but the four claws 60A have the same shape, and each of the claws 60A has the same shape. A convex portion 72 having a large protruding amount is formed on the inner side. The amount of protrusion of the protrusion 72 is the same as the amount of protrusion of the protrusion 72 of the first embodiment.

FIG. 9 is a diagram schematically showing the state of each nail and each hole after press-fitting the electronic device 10A of the comparative example.
As shown in FIG. 9, in the electronic device 10 </ b> A of the comparative example, all the claws 60 </ b> A greatly bite into the holes 21 to 24.
In this case, in the state after press-fitting, it is considered that the four claws 60A can more firmly prevent the shield cover 30 from being lifted up or dropped off. .

  On the other hand, according to the electronic device 10 of the first embodiment, the second and third claws 62 and 63 having a large bite amount exert a necessary minimum force, and the shield cover 30 can be lifted or raised. Dropout during reflow can be prevented. Therefore, even if the electronic device 10 is turned upside down and placed in the reflow furnace, the shield cover 30 can be prevented from being lifted or dropped.

  On the other hand, at the time of press-fitting, the second and third claws 62 and 63 require normal pressure input, but the first and fourth claws 61 and 64 are reduced in biting amount. Therefore, pressure input is not required as much as the second and third claws 62 and 63. Thereby, the pressure input as the shield cover 30 whole can be reduced. If the second and third claws 62 and 63 have the same amount of bite as before, and the first and fourth claws 61 and 64 have almost no bite amount (contact degree), it is necessary at the time of press-fitting. The load to be applied can be reduced to about half of the conventional load.

  Further, as the number of shield covers 30 simultaneously press-fitted increases, the pressure input for the first and fourth claws 61 and 64 can be reduced, so that more electronic parts can be applied in many ways. It becomes possible to manufacture, and the manufacturing cost can also be reduced. In addition, by reducing the pressure input, unnecessary loads (stresses) on the internal electronic components 14 to 19 and the solders 14a and 16a can be reduced.

  Furthermore, since the shield cover 30 is supported by the four claws 61 to 64, the shield cover 30 can be supported more stably, and problems such as lifting of the shield cover 30 can be prevented more reliably.

  Furthermore, since the protruding amount of the convex portion 72 of the second and third claws 62, 63 is larger than the protruding amount of the convex portion 71 of the first and fourth claws 61, 64, the second and third The pressure input to the first and fourth claws 61 and 64 can be reduced while the shield cover 30 is firmly fixed by the third claws 62 and 63. By adopting such a configuration, problems such as lifting of the shield cover 30 can be solved with a simple configuration in which the convex portions 71 and 72 having different protrusion amounts are provided.

[Second Embodiment]
FIG. 10 is an exploded perspective view showing an electronic apparatus according to the second embodiment of the present invention. In the following embodiments, the same reference numerals are assigned to items that are the same as those in the first embodiment, and redundant descriptions thereof are omitted as appropriate.

  The electronic device 10-2 according to the second embodiment is different from that of the first embodiment in that the four claws 61-2 to 64-2 have the same shape, and each of the claws 61-2 to 64-2 has the same shape. A convex portion 72 having a large protruding amount is formed on the inner side. This is the same as the electronic device 10A of the comparative example. The positions of the holes 20 (21 to 24) formed in the circuit board 12 are the same, but the positions where the claws 60 (61-2 to 64-2) are formed are different. The 1st nail | claw 61-2 is arrange | positioned away from the 2nd nail | claw 62-2 compared with the 1st nail | claw 61 of 1st Embodiment (refer arrow A in the figure). Note that the third and fourth claws 63-2 and 64-2 are not shown in the drawing because they are arranged on the back side of the shield cover 30, but the fourth claws 64-2 are also third. It is arrange | positioned on the outer side away from the nail | claw 63-2.

FIG. 11 is a diagram schematically illustrating the state of each nail and each hole after press-fitting of the electronic device 10-2 according to the second embodiment.
As shown in FIG. 11, the second and third claws 62-2 and 63-2 bite into the side walls of the second and third holes 22 and 23. The first and fourth claws 61-2 and 64-2 are in contact with the side walls of the first and fourth holes 21 and 24.

  In the present embodiment, the four claws have the same shape, but by shifting the position of the claws (shifting the relative positional relationship between the claws and the holes), the amount of biting is realized. ing. That is, the first and fourth claws 61-2 and 64-2 are arranged so as not to bite into the holes 21 and 24 by shifting the arrangement position to the outside of the holes 21 and 24. The second and third claws 62-2 and 63-2 are arranged so as to positively bite into the holes 22 and 23 so that a larger biting amount is generated.

  Thus, according to the second embodiment, problems such as lifting of the shield cover 30 can be solved with a simple configuration by simply shifting the position of each claw.

[Third Embodiment]
FIG. 12 is an exploded perspective view showing an electronic apparatus according to the third embodiment of the present invention.
In the electronic device 10-3 according to the third embodiment, as in the second embodiment, the four claws 61-3 to 64-3 have the same shape. A protrusion 72 having a large protruding amount is formed on the inner side. In the third embodiment, contrary to the second embodiment, the positions of the four nails are the same, but the amount of biting is changed by shifting the positions of the holes into which the nails are inserted (the nails and The relative positional relationship with the hole is shifted).

  Specifically, the first and fourth holes 21-3 and 24-3 are shifted in the direction inside the shield cover 30 (the direction of arrow B in the figure). Note that the third and fourth claws 63-3 and 64-3 are not shown in the figure because they are arranged on the back side of the shield cover 30.

FIG. 13 is a diagram schematically illustrating the state of each nail and each hole after press-fitting of the electronic device 10-3 according to the third embodiment.
As shown in FIG. 13, the second and third claws 62-3 and 63-3 are biting into the side walls of the second and third holes 22-3 and 23-3. The 1st and 4th nail | claw 61-3, 64-3 is a grade which contacts the side wall of the 1st and 4th hole 21-3, 24-3.

  In this embodiment, the four claws have the same shape, and the four claws are all arranged at the same position. However, by shifting the hole arrangement position, the amount of biting can be reduced. Realized. That is, the first and fourth holes 21-3 and 24-3 are formed on the inner side of the holes 21 and 24 of the first embodiment, and when they are press-fitted, the first and fourth claws 61- 3, 64-3 and the first and fourth holes 21-3, 24-3 are arranged so as to come into contact with each other. On the other hand, the second and third holes 22-3 and 23-3 are formed at the same positions as the holes 22 and 23 of the first embodiment, and the second and third holes at the time of press-fitting. The second and third claws 62-3 and 63-3 bite into the side walls 22-3 and 23-3.

  Thus, according to the third embodiment, even if the shape of each nail is the same, the amount of biting can be adjusted simply by shifting the position of each hole.

[Fourth Embodiment]
FIG. 14 is an exploded perspective view showing an electronic apparatus according to the fourth embodiment of the present invention.
Similarly to the second and third embodiments, the electronic device 10-4 according to the fourth embodiment is also one in which convex portions 72 having the same shape are formed on the four claws. And in this embodiment, although the arrangement position of each nail | claw is the same, the magnitude | sizes of each hole differ. Specifically, the second and third holes 22 and 23 are the same size as those of the above-described embodiment, but the first and fourth holes 21-4 and 24-4 are The holes are larger than the second and third holes 22 and 23.

FIG. 15 is a diagram schematically illustrating a state of each nail and each hole after press-fitting of the electronic device 10-4 according to the fourth embodiment.
As shown in FIG. 15, the second and third claws 62-4 and 63-4 bite into the side walls of the second and third holes 22 and 23. The 1st and 4th nail | claw 61-4, 64-4 is a grade which contacts the side wall of 1st and 4th hole 21-4, 24-4.

  In this embodiment, the four claws have the same shape, and the four claws are all arranged at the same position. However, by changing the size of each hole, the amount of biting is reduced. Realize big and small. That is, the first and fourth holes 21-4 and 24-4 are large holes, but the second and third holes 22 and 23 are more than the first and fourth holes 21-4 and 24-4. Are also small holes. Thereby, the amount of biting of the second and third claws 62-4 and 63-4 becomes large, and the amount of biting of the first and fourth claws 61-4 and 64-4 becomes small.

  Thus, according to the fourth embodiment, the amount of biting can be adjusted only by changing the size of the hole.

[Fifth Embodiment]
FIG. 16 is an exploded perspective view showing an electronic apparatus according to the fifth embodiment of the present invention.
Unlike the above-described embodiments, the electronic device 10-5 according to the fifth embodiment has no protrusions on the four claws. The four claws are simple flat protrusions. In this embodiment, the amount of biting is adjusted by changing the size of the four claws, more specifically, the width of the four claws. Specifically, the width X1 of the second and third claws 62-5 and 63-5 is wider than the width X2 of the first and fourth claws 61-5 and 64-5. In FIG. 16, the third and fourth claws 63-5 and 64-5 are not shown.

FIG. 17 is a diagram schematically illustrating the state of each nail and each hole after press-fitting of the electronic device 10-5 according to the fifth embodiment.
As shown in FIG. 17, the second and third claws 62-5 and 63-5 bite into the side walls of the second and third holes 22 and 23. The first and fourth claws 61-5 and 64-5 are only in contact with the side walls of the first and fourth holes 21 and 24.

In the present embodiment, the four claws are all arranged at the same position, but the amount of biting is realized by changing the width of the four claws. That is, the second and third claws 62-5 and 63-5 are wide claws, and the first and fourth claws 61-5 and 64-5 are narrow claws.
Since the second and third claws 62-5 and 63-5 are wide claws, the amount of biting into the side walls of the second and third holes 22 and 23 increases. On the other hand, since the first and fourth claws 61-5 and 64-5 are claws narrower than the second and third claws 62-5 and 63-5, the first and fourth holes 21 are provided. , 24 bite into the side walls.

  Thus, according to the fifth embodiment, even if the nail does not have a convex portion, the amount of biting can be adjusted only by changing the size (width of the nail) of each nail. As in the embodiments described above, problems such as the lifting of the shield cover 30 can be solved.

  The present invention can be implemented with various modifications and substitutions without being limited to the above-described embodiment. In addition, the configuration of the electronic device described in one embodiment is a preferable example, and it is needless to say that these can be implemented with appropriate modifications.

  In the above-described embodiment, the shield cover 30 is rectangular (rectangular), but may be square or the like.

  Moreover, the arrangement | positioning of the nail | claw and the hole quoted by embodiment mentioned above is an example to the last, Comprising: Arrangements other than these may be employ | adopted and a magnitude | size, the number of arrangement | positioning, etc. can be changed suitably.

  Furthermore, the electronic device is not limited to the high-frequency module, and may be an electronic circuit module having another electronic circuit, an electronic circuit unit, or the like.

  Although each convex part demonstrated in the example which protrudes and forms inside the shield cover 30, you may form it protruding outside. That is, in the above-described embodiment, the structure is such that the circuit board is sandwiched between the projections of each nail, but a projection is provided on the opposite side, and the shield cover 30 is held by being stretched by the projection. It may be a structure.

  Although two nails have been described as being formed on the long side of the shield cover 30, two claws may be formed on the short side.

  Although the shield cover 30 has been described with an example in which four claws are formed, three claws may be used. In this case, for example, two claws with a large bite amount are provided at the diagonal portion of the top plate, and the remaining one claw is provided at one of the corners. In this way, not only can the shield cover 30 be prevented from being lifted by the two claws formed at the diagonal portions, but the fourth claws are eliminated, and the pressure input can be reduced accordingly. This form is realizable by eliminating the 4th nail | claw 64 and the 4th hole 24 of 1st Embodiment, for example.

FIG. 18 is a view showing a shield cover of an electronic device according to a modification of the present invention.
The claws of the shield cover 30 may be bent claws 60B as shown in FIG. 18, for example. The claw 60 </ b> B is a claw that extends in the opening direction of the shield cover 30 after the claw extending in the opening direction of the shield cover 30 is once bent at a right angle with respect to the side plate 50 and then bent again at a right angle. Even when the nail having such a shape is employed, the same effects as those of the above-described embodiments can be obtained.

10, 10-2 to 10-5 Electronic device 12 Circuit board 12a Mounting surface 14, 16, 18, 19 Electronic component 20 (21 to 24) Hole 30 Shield cover 40 Top plate 50 (51 to 54) Side plate 60 (61 to 61) 64) Claw 70 (71, 72) Convex part

Claims (6)

An insulating substrate on which electronic components are mounted;
A metal cover that covers the insulating substrate;
The cover is
A rectangular top plate,
First to fourth side plates provided in contact with each side of the top plate;
First and second claws provided on the first side plate;
A third claw provided on the third side plate facing the first side plate,
The second claw and the third claw are provided on or near the diagonal of the top plate,
The insulating substrate is
A first hole into which the first claw is inserted;
A second hole into which the second claw is inserted;
A third hole into which the third claw is inserted,
When the second and third claws are inserted into the second and third holes, the amount of bite that the second and third claws bite into the side walls of the second and third holes is An electronic apparatus, wherein the first claw is inserted into the first hole, so that the first claw is larger than the amount of biting into the side wall of the first hole. The electronic device according to claim 1,
The third side plate is
With a fourth nail,
The first nail and the fourth nail are:
Provided on or near the diagonal of the top plate,
The insulating substrate is
A fourth hole into which the fourth claw is inserted;
When the second and third claws are inserted into the second and third holes, the amount of bite that the second and third claws bite into the side walls of the second and third holes is When the first and fourth claws are inserted into the first and fourth holes, the first and fourth claws are larger than the amount of biting into the side walls of the first and fourth holes. Electronic equipment characterized by The electronic device according to claim 1,
Each nail is
Protruding portions protruding in the direction of biting into the side walls of the holes,
The convex portions of the first and second claws protrude from the inside or the outside,
The convex part of the third claw protrudes in the opposite direction to the second claw,
The protruding amount of the convex portion of the second claw and the third claw is larger than the protruding amount of the convex portion of the first claw. The electronic device according to claim 2,
Each nail is
Protruding portions protruding in the direction of biting into the side walls of the holes,
The convex portions of the first and second claws protrude from the inside or the outside,
The protrusions of the third and fourth claws protrude from the inside to the outside or from each other,
The electronic device, wherein the protruding amount of the convex portions of the second and third claws is larger than the protruding amount of the convex portions of the first and fourth claws. The electronic device according to claim 1 or 2,
The amount of bite is
An electronic apparatus wherein adjustment is performed by shifting a relative positional relationship between each nail and each hole. The electronic device according to claim 1 or 2,
The amount of bite is
The electronic device is adjusted by changing the size of each nail or the size of each hole.

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