JP2007234649A - Printed wiring board structure, and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printed wiring board structure in which the number of manufacturing steps can be reduced, and propagation of impact to a printed wiring board can be lessened. <P>SOLUTION: The printed wiring board structure comprises a case 2, a boss 11 projecting from the case 2, a double-split latch member 14 disposed on the top of the boss 11 and provided with a swelling portion at the distal end, a printed wiring board 21 provided with a through-hole into which the double-split latch member 14 can be inserted, a rubber washer 26 for making the double-split latch member 14 holding the printed wiring board 21 elastically from the opposite sides, and a backup ring 28 for pressing the rubber washer 26 against the printed wiring board 21. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a printed wiring board structure and an electronic device.

  Electronic devices such as notebook personal computers incorporate a printed circuit board in which electronic elements such as semiconductor elements are mounted on a printed wiring board. In the printed board, the electronic element is connected to the circuit of the printed wiring board using solder or the like.

  The printed circuit board is fixed to a boss formed integrally with the casing of the electronic device by screwing or the like in order to reduce the weight, reduce the number of manufacturing processes, and the like. For the printed circuit board, a rigid substrate such as a glass epoxy substrate is used for an electronic device such as a notebook computer.

  However, since portable electronic devices such as notebook personal computers are portable, some users may be placed on a desk or the like or dropped on the floor to be subjected to a strong impact.

  In this case, since a strong impact is directly propagated through the boss to the printed board fixed to the boss of the casing of the electronic device by screwing or the like, an electronic element such as a semiconductor element mounted on the printed board is peeled off from the circuit. There is a case.

  In particular, the BGA (ball grid array) package of semiconductor elements that has been used in recent years is one in which a large number of solder balls arranged in a vertical and horizontal grid are soldered by reflow or the like on the bottom surface of the semiconductor element. There is a problem that stress concentrates on a soldering portion of a solder ball disposed at a corner portion or the like of a semiconductor element and is easily peeled off.

In Patent Document 1 (Japanese Utility Model Laid-Open No. 5-57887), a rubber support is provided on a base, an engaging portion is formed on the support, and the circuit board is engaged and held by the engaging portion. A circuit board support apparatus is disclosed.
Japanese Utility Model Publication No. 5-57887

  Since the circuit board indicating device described in Patent Document 1 is obtained by attaching the circuit board via a rubber-like support formed on a cabinet or chassis, a sufficient impact is expected when the rubber constituting the support deteriorates over time. The absorption of the boss may not be performed, and it is not possible to adopt the technique for integrally molding the boss with the housing in order to reduce the weight of the electronic device and reduce the number of manufacturing steps as in recent years.

  Accordingly, an object of the present invention is to provide a printed wiring board structure and an electronic apparatus that can reduce the number of manufacturing steps and can reduce the propagation of a strong impact to the printed wiring board.

  In order to achieve the above object, a printed wiring board structure according to the present invention is provided with a housing, a boss projecting from the housing, a top portion of the boss, and a bulging portion at a tip portion. And the printed wiring board provided with a through-hole through which the two-breaking locking member can be inserted, and the printed wiring board is elastically held by the two-breaking locking member from both sides. A rubber washer and a backup ring for pressing the rubber washer against the printed wiring board are provided.

  Further, an electronic device according to the present invention includes a housing, a boss protruding from the housing, a two-part locking member provided at the top of the boss, and having a bulging portion at the tip. A printed wiring board provided with a through-hole through which the split-breaking member can be inserted, a rubber washer that elastically holds the printed-wiring board on both sides from both sides, and the printed-wiring board And a backup ring for pressing the rubber washer.

  Furthermore, the printed wiring board structure according to the present invention includes a housing, a boss projecting from the housing, a cylindrical locking member provided on the top of the boss and having a pin insertion hole on a side surface, A printed wiring board provided with a through-hole through which the cylindrical locking member can be inserted, a rubber washer for elastically holding the printed wiring board from both sides to the cylindrical locking member, and the rubber on the printed wiring board A backup ring for pressing the washer and a snap pin for preventing the backup ring from coming off are provided.

  An electronic device according to the present invention includes a housing, a boss projecting from the housing, a cylindrical locking member provided on the top of the boss and having a pin insertion hole on a side surface, and the tubular A printed wiring board provided with a through-hole through which the locking member can be inserted, a rubber washer that elastically holds the printed wiring board on both sides from the cylindrical locking member, and the rubber washer pressed against the printed wiring board And a snap pin for preventing the backup ring from coming off.

  Furthermore, the printed wiring board structure according to the present invention includes a housing, a boss that protrudes from the housing and has a shaft hole that is recessed at the top, and a bulging portion at the tip. A fixed pin inserted through the shaft hole, a printed wiring board provided with a through-hole through which the fixed pin can be inserted, a rubber washer that elastically holds the printed wiring board from both sides to the fixed pin, and the printed wiring A backup ring that presses the rubber washer on the plate, and the fixing pin abuts the rubber washer on both sides of the printed wiring board, and is inserted through the shaft hole of the boss from the backup ring side, The printed wiring board is elastically held.

  In addition, an electronic device according to the present invention includes a housing, a boss that protrudes from the housing and has a shaft hole that is recessed at the top, and a bulge at the tip, and the shaft hole of the boss. A fixed pin inserted through the printed wiring board, a printed wiring board provided with a through-hole through which the fixed pin can be inserted, a rubber washer that elastically holds the printed wiring board from both sides, and the printed wiring board. A backup ring that presses a rubber washer, and the fixing pin abuts the rubber washer on both sides of the printed wiring board, and is inserted through the shaft hole of the boss from the backup ring side, and the printed wiring board Is held elastically.

  The number of manufacturing processes of the printed wiring board structure and the electronic device can be reduced, and the propagation of impact to the printed wiring board can be reduced.

  Embodiments of a printed wiring board structure and an electronic apparatus according to the present invention will be described with reference to the accompanying drawings.

[First Embodiment]
FIG. 1 is a perspective view showing an embodiment of an electronic apparatus 1 according to the present invention.

  The electronic apparatus 1 shown in FIG. 1 is an example of a notebook personal computer, but may be a laptop personal computer. In this electronic apparatus 1, a lid 5 provided with a display means 4 such as a display panel on a housing 2 via a hinge means 3 is rotatable between a position where the upper surface of the housing 2 is closed and a position where it is opened. Connected. An input means 6 such as a keyboard is provided on the upper surface of the housing 2. The hinge means 3 electrically and mechanically connects the lid 5 to the housing 2.

  The electronic device 1 contains a printed wiring board structure 10.

  FIG. 2 is an exploded perspective view schematically showing the printed wiring board structure 10 built in the electronic apparatus 1.

  The printed wiring board structure 10 includes a housing 2, a boss 11 projecting from the housing 2, and a two-break locking member 14 provided on the top 12 of the boss 11. The housing 2, the boss 11, and the two-fold locking member 14 are integrally formed.

  The boss 11 is a substantially cylindrical body projecting from the housing 2 and has a flat top portion 12. A plurality of bosses 11 are provided in the housing 2 and hold the printed wiring board 21 from the housing 2 at a predetermined interval. The shape of the boss 11 is not limited to a substantially cylindrical shape, and may be a prismatic shape or the like.

  The half-breaking locking member 14 protrudes from the top 12 of the boss 11.

  The double-breaking locking member 14 is composed of two projecting pieces 17a and 17b that are spaced apart and face each other. The projecting pieces 17a and 17b are semi-cylindrical projecting piece main bodies 15a and 15b projecting from the top 12 of the boss 11, and hemispherical bulging parts 16a provided at the tip ends of the projecting piece main bodies 15a and 15b, respectively. 16b.

  The projecting piece 17a and the projecting piece 17b are formed with flat portions 18a and 18b on opposite surfaces, respectively. The flat surface portion 18a of the projecting piece 17a and the flat surface portion 18b of the projecting piece 17b are provided with a distance D therebetween and facing each other.

  FIG. 3 is a cross-sectional view schematically showing the printed wiring board structure 10 built in the electronic apparatus 1.

  Since the two-pronged locking member 14 is provided with the projecting pieces 17a and 17b which are close to each other separated and opposed to each other, when a force is applied in the direction of arrow A in FIG. 3, the projecting pieces 17a and 17b are bent. The separation distance D is shortened.

  In the state in which the force is not applied in the direction of arrow A in FIG. 3 and the projecting pieces 17a and 17b are not bent, the double-breaking locking member 14 is the maximum of the portion formed by the two bulging portions 16a and 16b. The diameter is E.

  In addition, the shape of the projecting piece main bodies 15a and 15b of the bifurcated locking member 14 is not limited to a substantially semi-cylindrical shape, and may be a prismatic shape, a plate shape, or the like. Further, the shape of the bulging portions 16a and 16b of the two-fold locking member 14 is not limited to a substantially hemispherical shape, and may be a semi-cylindrical shape or the like.

  In addition, the two-splitting locking member 14 is a two-splitting member made up of the projecting pieces 17a and 17b. As long as the locking member can be locked, a locking member having a shape other than the two split shape can be used.

  For example, the two-splitting locking member 14 is cracked in an arbitrary number such as a three-splitting member (not shown) having a three-splitting shape, a four-splitting four-splitting member, or a five-splitting five-splitting member It can be a locking member.

  The housing 2, the boss 11, and the two-splitting locking member 14 are formed of plastic or the like. When the material of the housing 2 is a non-conductive material such as plastic, it is preferable to apply a conductive paint or the like to the inner surface because the printed wiring board 21 can be grounded to the housing 2.

  The printed wiring board structure 10 includes a printed wiring board 21. As the printed wiring board 21, a rigid printed wiring board or a flexible printed wiring board is used.

  The printed wiring board 21 is provided with a through hole 22 into which the two-breaking locking member 14 can be inserted. The shape of the through hole 22 is not limited to a circle, and can be set as appropriate according to the shape of the two-fold locking member 14.

  The through-hole 22 does not pass through the bulging portions 16a and 16b in a state where the projecting pieces 17a and 17b of the bifurcated locking member 14 are not bent, and bulges in a state where the projecting pieces 17a and 17b are bent. It is formed in a size and shape that can be inserted through 16a and 16b.

  The printed wiring board structure 10 includes a rubber washer 26 that elastically holds the printed wiring board 21 from the front and back sides of the printed wiring board 21 by the two-fold locking member 14. Two rubber washers 26 are used for one through hole 22 of the printed wiring board 21 in order to elastically hold the printed wiring board 21 from both the front and back sides.

  Rubber is used as the material of the rubber washer 26. Of these, rubber having high shock absorption is preferable.

  Examples of the rubber having high impact absorption used for the rubber washer 26 include IIR (butyl rubber), NBR (nitrile rubber), SR (silicone rubber), NR (natural rubber), BR (butanediene rubber) and the like. . Among these, IIR (butyl rubber), NBR (nitrile rubber), and SR (silicone rubber) are preferable because of high shock absorption, and IIR (butyl rubber) is more preferable because of high shock absorption.

  Moreover, it is preferable that the material of the rubber washer 26 is conductive rubber because the printed wiring board 21 and the housing 2 can be electrically connected. Examples of the conductive rubber used for the rubber washer 26 include NR (natural rubber), CR (chloroprene rubber), NBR (nitrile rubber), etc. Among them, NBR (nitrile rubber) is preferable because of its high conductivity. .

  The rubber washer 26 is provided with a through hole 27 into which the two-break locking member 14 can be inserted.

  The printed wiring board structure 10 includes a backup ring 28 that presses the rubber washer 26 against the printed wiring board 21. The material of the backup ring 28 is not particularly limited, and a metal such as stainless steel, engineering plastic, or the like is used.

  The backup ring 28 is provided with a through hole 29 through which the two-breaking locking member 14 can be inserted. The shape of the through hole 29 is not limited to a circle, and can be set as appropriate according to the shape of the two-fold locking member 14.

  The through-hole 29 of the backup ring 28 is in a state in which the protruding pieces 17a and 17b are not inserted through the protruding pieces 17a and 17b of the bifurcated locking member 14 and the protruding pieces 17a and 17b are bent. It is formed in a size and shape that can be inserted through the bulging portions 16a and 16b.

  In the printed wiring board structure 10, the printed wiring board 21 is inserted into the half-breaking locking member 14. At the time of insertion, rubber washers 26 (26a) and 26 (26b) are arranged on both the front and back sides of the printed wiring board 21.

  The rubber washer 26 a disposed on the boss 11 side is interposed between the top surface 12 of the boss 11 and the printed wiring board 21.

  On the other hand, a backup ring 28 that presses the rubber washer 26 b against the printed wiring board 21 is further disposed on the rubber washer 26 b disposed on the opposite side of the boss 11.

  Thus, in the printed wiring board structure 10, the rubber washer 26a, the printed wiring board 21, the rubber washer 26b, and the backup ring 28 are arranged in this order on the top surface 12 of the boss 11.

  For example, the printed wiring board 21 and the backup ring 28 are inserted into the two-break locking member 14 by applying a force in the direction of arrow A in FIG. 3 to the projecting pieces 17a and 17b of the two-break locking member 14. In this case, the protrusions 17a and 17b are inserted while reducing the distance D between the protrusions 17a and 17b.

  The rubber washers 26a and 26b are inserted into the two-breaking locking member 14 because the rubber washers 26a and 26b are formed of rubber, so that two through holes 27a of the rubber washer 26a and two through holes 27b of the rubber washer 26b are provided. For example, it is strongly pressed against the crack locking member 14.

  In the backup ring 28 disposed on the rubber washer 26b, the through-hole 29 of the backup ring 28 does not pass through the bulging portions 16a and 16b in a state in which the projecting pieces 17a and 17b of the bifurcated locking member 14 are not bent. Therefore, it is prevented from coming off at the lower part of the bulging portions 16a and 16b of the double-breaking locking member 14.

  The backup ring 28 is prevented from coming off by the bulging portions 16a and 16b of the two-fold locking member 14, so that the rubber washer 26a, the printed wiring board 21, and the rubber washer 26b are disposed on the top surface of the top portion 12 of the boss 11. Further, the backup ring 28 is fixed so as not to easily come off from the half-breaking locking member 14.

  Next, the operation of the printed wiring board structure 10 and the electronic device 1 according to the present invention will be described.

  In the printed wiring board structure 10, rubber washers 26 are interposed between the printed wiring board 21 and the upper surface of the top portion 12 of the boss 11 and between the printed wiring board 21 and the backup ring 28.

  For this reason, even if a strong impact is applied to the housing 2 of the electronic device 1 by dropping the electronic device 1 containing the printed wiring board structure 10 or the like, the top portion 12 of the boss 11 integrally molded with the housing 2 is used. Since a rubber washer 26 that absorbs an impact is interposed between the boss 11 and the printed wiring board 21, strong impact propagation from the boss 11 to the printed wiring board 21 is reduced.

  In addition, since the rubber washer 26 and the backup ring 28 that absorb the impact are interposed between the two split locking member 14 integrally formed with the boss 11 and the printed wiring board 21, the two split locking member 14 is provided. The propagation of strong impact from to the printed wiring board 21 is reduced.

  In the printed wiring board structure 10 and the electronic device 1 according to the present invention, the housing 2, the boss 11, and the two-breaking locking member 14 are integrally molded, so that the number of manufacturing steps can be reduced.

  In the printed wiring board structure 10 and the electronic device 1 according to the present invention, rubber washers 26 are interposed between the printed wiring board 21 and the boss 11 and between the printed wiring board 21 and the backup ring 28, respectively. Therefore, strong impact propagation to the printed wiring board 21 can be reduced.

[Second Embodiment]
Next, a second embodiment of the printed wiring board structure and the electronic device according to the present invention will be described with reference to FIGS.

  The electronic device 1A shown in the second embodiment is different from the electronic device 1 shown in the first embodiment in that a built-in printed wiring board structure is printed from the printed wiring board structure 10 of the electronic device 1. It is different in that it is replaced with the wiring board structure 10A, and other configurations and operations including the appearance are the same as those of the electronic apparatus 1. For this reason, the perspective view which shows 1 A of electronic devices is shown in FIG. 1 similarly to the electronic device 1, the same code | symbol is attached | subjected to the same member, and description is simplified or abbreviate | omitted.

  10A of printed wiring board structures shown by 2nd Embodiment replace with the two crack locking member 14 with respect to the printed wiring board structure 10 shown by 1st Embodiment, and are cylindrical latching The difference is that the member 34 and the snap pin 37 are used, and other configurations and operations are the same as those of the printed wiring board structure 10 shown in the first embodiment. Simplify or omit.

  The cylindrical locking member 34 projects from the top 12A of the boss 11A.

  The cylindrical locking member 34 includes a columnar cylindrical locking member main body 35 with a rounded tip, and a pin insertion hole that penetrates the cylindrical locking member main body 35 on the side surface of the cylindrical locking member main body 35. 36 is formed.

  The casing 2, the boss 11 </ b> A, and the cylindrical locking member 34 are flexible like the two-fold locking member 14 of the printed wiring board structure 10 shown in the first embodiment. In addition to plastic, it can be formed of magnesium alloy or the like.

  The snap pin 37 includes an insertion portion 37a formed of a linear rod-like body, and a first bent portion 37b that is continuously provided so that the side surface is in contact with the insertion portion 37a by changing the direction approximately 180 degrees from the end of the insertion portion 37a. Have

  The snap pin 37 is bent from the end portion of the first bent portion 37b and is continuously provided. The snap pin 37 is separated from the insertion portion 37a and bent again to come into contact with the insertion portion 37a. And a third bent portion 37d which is bent from the end portion of the second bent portion 37c and is continuously provided and separated from the insertion portion 37a.

  The snap pin 37 is inserted into the pin insertion hole 36 provided in the cylindrical locking member 34 at the insertion portion 37a, and is pulled away from the insertion portion 37a when the insertion portion 37a is inserted, so that the snap pin 37 is restored to the insertion portion 37a side. The locking portion 38 provided on the second bent portion 37 c applies pressure to the side surface of the cylindrical locking member main body 35 of the cylindrical locking member 34, thereby being fixed to the cylindrical locking member 34. Thereby, the snap pin 37 prevents the backup ring 28A from coming off.

  The printed wiring board 21A is provided with a through hole 22A into which the cylindrical locking member 34 can be inserted. The shape of the through hole 22 </ b> A is not limited to a circle, and can be appropriately set according to the shape of the cylindrical locking member 34.

  The rubber washer 26 elastically holds the printed wiring board 21A on the cylindrical locking member 34 from both the front and back sides. Two rubber washers 26 are used for one of the through holes 22A of the printed wiring board 21A in order to elastically hold the printed wiring board 21A from both the front and back sides.

  The rubber washer 26 is provided with a through hole 27 into which the cylindrical locking member 34 can be inserted.

  The backup ring 28A is provided with a through hole 29A into which the cylindrical locking member 34 can be inserted. The shape of the through hole 29 </ b> A is not limited to a circle, and can be appropriately set according to the shape of the cylindrical locking member 34.

  In the printed wiring board structure 10 </ b> A, the printed wiring board 21 </ b> A is inserted through the cylindrical locking member 34. During the insertion, rubber washers 26a and 26b are arranged on both the front and back sides of the printed wiring board 21A.

  The rubber washer 26a disposed on the boss 11A side is interposed between the top surface 12A of the boss 11A and the printed wiring board 21A.

  On the other hand, a backup ring 28A for pressing the rubber washer 26b against the printed wiring board 21A is further disposed on the rubber washer 26b disposed on the side opposite to the boss 11A.

  Thus, in the printed wiring board structure 10A, the rubber washer 26a, the printed wiring board 21A, the rubber washer 26b, and the backup ring 28A are arranged in this order on the top surface 12A of the boss 11A.

  The printed wiring board 21A, the rubber washers 26a and 26b, and the backup ring 28A are inserted into the cylindrical locking member 34 by the through hole 27a of the rubber washer 26a, the through hole 22A of the printed wiring board 21A, and the through hole 27b of the rubber washer 26b. In addition, the through hole 29A of the backup ring 28A is simply passed through the cylindrical locking member 34.

  In the printed wiring board structure 10A, the rubber washer 26a, the printed wiring board 21A, the rubber washer 26b, and the backup ring 28A are arranged in this order on the top surface 12A of the boss 11A. A snap pin 37 is inserted into the pin insertion hole 34.

  When the snap pin 37 is inserted, the snap pin 37 restricts the upward movement of the backup ring 28A, prevents the backup ring 28A from coming off, and is disposed on the top surface of the top portion 12A of the boss 11A. The washer 26a, the printed wiring board 21A, the second rubber washer 26b, and the backup ring 28A are fixed so as not to be easily detached from the cylindrical locking member 34.

  Since the operation of the printed wiring board structure 10A and the electronic device 1A according to the present invention is the same as the operation of the printed wiring board structure 10 and the electronic device 1, description thereof is omitted.

  In the printed wiring board structure 10A and the electronic apparatus 1A according to the present invention, since the housing 2, the boss 11A, and the cylindrical locking member 34 are integrally formed, the number of manufacturing steps can be reduced.

  Further, the printed wiring board structure 10A and the electronic device 1A can be integrally molded with a metal material such as a magnesium alloy as well as being integrally molded with plastic like the printed wiring board structure 10 and the electronic device 1.

  Furthermore, in the printed wiring board structure 10A and the electronic device 1A according to the present invention, rubber washers 26 are interposed between the printed wiring board 21A and the boss 11A and between the printed wiring board 21A and the backup ring 28A, respectively. Therefore, strong impact propagation to the printed wiring board 21A can be reduced.

[Third Embodiment]
Next, a third embodiment of the printed wiring board structure and the electronic device according to the present invention will be described with reference to FIGS.

  In the electronic device 1B shown in the third embodiment, the built-in printed wiring board structure is printed from the printed wiring board structure 10 of the electronic device 1 with respect to the electronic device 1 shown in the first embodiment. It differs only in the point which replaced with the wiring board structure 10B, and the other structure and effect | action including an external appearance are the same as that of the electronic device 1. FIG. For this reason, the perspective view which shows the electronic device 1B is shown in FIG. 1 similarly to the electronic device 1, the same code | symbol is attached | subjected to the same member, and description is simplified or abbreviate | omitted.

  The printed wiring board structure 10B shown in the third embodiment is replaced with a boss 11 that does not have a shaft hole recessed at the top of the printed wiring board structure 10 shown in the first embodiment. The boss 11B having a shaft hole recessed at the top is used, and the boss 11B and a separate fixing pin 44 are used in place of the two split locking members 14 projecting from the boss 11. Differently, other configurations and operations are the same as those of the printed wiring board structure 10 shown in the first embodiment. Therefore, the same members are denoted by the same reference numerals, and description thereof is simplified or omitted.

  The boss 11B is a substantially cylindrical body projecting from the housing 2 and has a flat top portion 12B. Moreover, the recessed shaft hole 13 is provided in the top part 12B of the boss | hub 11B. A fixing pin 44 is press-fitted into the shaft hole 13. The housing 2 and the boss 11B are integrally molded.

  The housing 2 and the boss 11B are made of plastic, magnesium alloy or the like. The shape of the boss 11B is not limited to a substantially cylindrical shape, and may be a prismatic shape or the like.

  The fixing pin 44 is formed of a cylindrical fixing pin main body 45 and a spherical bulging portion 46 provided at the tip of the fixing pin main body 45. The fixing pin 44 is inserted through the shaft hole 13 of the boss 11B.

  The fixing pin main body 45 of the fixing pin 44 has a size and shape that can be press-fitted into the shaft hole 13 of the boss 11B. When the boss 11B is formed of a material softer than the fixing pin 44, the diameter of the shaft hole 13 of the boss 11B is widened by the insertion of the fixing pin 44. Therefore, the diameter of the fixing pin 44 is set to the shaft hole 13 of the boss 11B. It may be larger than the diameter.

  The fixing pin 44 is separate from the housing 2 and the boss 11 and is made of plastic, magnesium alloy or the like.

  The fixing pin 44 makes rubber washers 26a and 26b abut on both the front and back sides of the printed wiring board 21B and is inserted through the shaft hole 13 of the boss 11B from the backup ring 28B side to elastically hold the printed wiring board 21B.

  The printed wiring board 21 </ b> B is provided with a through hole 22 </ b> B through which the fixing pin main body 45 of the fixing pin 44 can be inserted. The shape of the through hole 22 </ b> B is not limited to a circle, and can be appropriately set according to the shape of the fixing pin main body 45 of the fixing pin 44.

  The rubber washer 26 elastically holds the printed wiring board 21B on the fixing pins 44 from both the front and back sides. Two rubber washers 26 are used for one of the through holes 22B of the printed wiring board 21B in order to elastically hold the printed wiring board 21B from both the front and back sides.

  The rubber washer 26 is provided with a through hole 27 into which the fixing pin 44 can be inserted.

  The backup ring 28B is provided with a through hole 29B through which the fixing pin 44 can be inserted. The shape of the through hole 29 </ b> B is not limited to a circle, and can be appropriately set according to the shape of the fixing pin 44.

  In the printed wiring board structure 10B, the fixing pin 44 is inserted into the printed wiring board 21B. At the time of insertion, rubber washers 26a and 26b are arranged on both the front and back sides of the printed wiring board 21B.

  The rubber washer 26a disposed on the boss 11B side is interposed between the top surface 12B of the boss 11B and the printed wiring board 21B.

  On the other hand, a backup ring 28B that presses the rubber washer 26b against the printed wiring board 21B is further disposed on the rubber washer 26b disposed on the side opposite to the boss 11B.

  Thereby, in the printed wiring board structure 10B, the rubber washer 26a, the printed wiring board 21B, the rubber washer 26b, and the backup ring 28B are arranged in this order on the top surface 12B of the boss 11B.

  The fixing pin 44 is inserted into the printed wiring board 21B, the rubber washers 26a, 26b, and the backup ring 28B. The through hole 29B of the backup ring 28B, the through hole 27b of the rubber washer 26b, the through hole 22B of the printed wiring board 21B, and the rubber This is done by inserting the fixing pins 44 in the order of the through holes 27a of the washer 26a.

  When the fixing pin 44 is inserted, the bulging portion 46 of the fixing pin 44 restricts the upward movement of the backup ring 28B, prevents the backup ring 28B from coming off, and is disposed on the top 12B of the boss 11B. The first rubber washer 26a, the printed wiring board 21B, the second rubber washer 26b, and the backup ring 28B are fixed so as not to be easily detached from the cylindrical locking member 34.

  Since the operation of the printed wiring board structure 10B and the electronic device 1B according to the present invention is the same as the operation of the printed wiring board structure 10 and the electronic device 1, description thereof will be omitted.

  In the printed wiring board structure 10B and the electronic device 1B according to the present invention, since the housing 2 and the boss 11B are integrally formed, the number of manufacturing steps can be reduced.

  In addition, the printed wiring board structure 10B and the electronic device 1B can be integrally molded with a metal material such as a magnesium alloy as well as being integrally molded with plastic like the printed wiring board structure 10 and the electronic device 1.

  Furthermore, since the printed wiring board structure 10B and the electronic device 1B only have to prepare the fixing pins 44 separately from the housing 2 and the boss 11B, the bosses are not provided like the printed wiring board structure 10 or the printed wiring board structure 10A. When it is difficult to produce a relatively complicated double-breaking locking member 14 on the top surface of 11 or to manufacture a cylindrical locking member 34 having a relatively complicated shape on the top surface of the boss 11A However, the same effect as the printed wiring board structure 10 or the printed wiring board structure 10A can be obtained.

  Furthermore, in the printed wiring board structure 10B and the electronic device 1B according to the present invention, rubber washers 26 are interposed between the printed wiring board 21B and the boss 11B and between the printed wiring board 21B and the backup ring 28B, respectively. Therefore, propagation of strong impact to the printed wiring board 21B can be reduced.

FIG. 14 is a perspective view showing an external configuration of an electronic apparatus according to the invention. 1 is an exploded perspective view schematically showing a printed wiring board structure according to a first embodiment built in an electronic apparatus according to the present invention. Sectional drawing which shows typically the printed wiring board structure of 1st Embodiment incorporated in the electronic device which concerns on this invention. The disassembled perspective view which shows typically the printed wiring board structure of 2nd Embodiment incorporated in the electronic device which concerns on this invention. Sectional drawing which shows typically the printed wiring board structure of 2nd Embodiment incorporated in the electronic device which concerns on this invention. The disassembled perspective view which shows typically the printed wiring board structure of 3rd Embodiment incorporated in the electronic device which concerns on this invention. Sectional drawing which shows typically the printed wiring board structure of 3rd Embodiment incorporated in the electronic device which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A, 1B Electronic device 2 Case 3 Hinge means 4 Display means 5 Cover body 6 Input means 10, 10A, 10B Printed wiring board structure 11, 11A, 11B Boss 12, 12A, 12B Top part of boss 13 Top part of boss Shaft hole 14 provided in a concave portion Split-locking member 15, 15a, 15b Projection piece main body 16, 16a, 16b Protruding portion 17, 17a, 17b Proximity piece 18a, 18b Plane of proximity projection piece Part 21, 21A, 21B Printed wiring board 22, 22A, 22B Printed wiring board through hole 26, 26a, 26b Rubber washer 27, 27a, 27b Rubber washer through hole 28, 28A, 28B Backup ring 29, 29A, 29B Backup Through-hole 34 of the ring Cylindrical locking member 35 Cylindrical locking member main body 36 Pin insertion hole 37 Snap pin 37a Snap pin Second bend 38 snaps pin engaging portion 44 securing pin 45 fixed pin body 46 bulging portion of the first bent portion 37c snap pin insertion portion 37b snap pin

Claims (12)

A housing,
A boss projecting from this housing,
Two split locking members provided at the top of this boss and provided with a bulge at the tip,
A printed wiring board provided with a through-hole through which the two split locking members can be inserted;
A rubber washer that elastically holds the printed wiring board on both sides from the two sides,
A printed wiring board structure comprising a backup ring for pressing the rubber washer to the printed wiring board. The printed wiring board structure according to claim 1, wherein the casing, the boss, and the bifurcated locking member are integrally molded. A housing,
A boss projecting from this housing,
Two split locking members provided at the top of this boss and provided with a bulge at the tip,
A printed wiring board provided with a through-hole through which the two split locking members can be inserted;
A rubber washer that elastically holds the printed wiring board on both sides from the two sides,
An electronic apparatus comprising: a backup ring that presses the rubber washer to the printed wiring board. The electronic apparatus according to claim 3, wherein the casing, the boss, and the two-splitting locking member are integrally molded. A housing,
A boss projecting from this housing,
A cylindrical locking member provided at the top of this boss and having a pin insertion hole on the side surface;
A printed wiring board provided with a through-hole through which this cylindrical locking member can be inserted;
A rubber washer that elastically holds the printed wiring board on both sides from both sides,
A backup ring that presses the rubber washer against the printed wiring board;
A printed wiring board structure comprising a snap pin for preventing the backup ring from coming off. 6. The printed wiring board structure according to claim 5, wherein the casing, the boss, and the cylindrical locking member are integrally molded. A housing,
A boss projecting from this housing,
A cylindrical locking member provided at the top of this boss and having a pin insertion hole on the side surface;
A printed wiring board provided with a through-hole through which this cylindrical locking member can be inserted;
A rubber washer that elastically holds the printed wiring board on both sides from both sides,
A backup ring that presses the rubber washer against the printed wiring board;
An electronic device comprising a snap pin for preventing the backup ring from coming off. The electronic apparatus according to claim 7, wherein the casing, the boss, and the cylindrical locking member are integrally molded. A housing,
A boss having a shaft hole protruding from the housing and recessed at the top,
A bulging portion at the tip, and a fixing pin inserted through the shaft hole of the boss;
A printed wiring board provided with a through hole through which the fixing pin can be inserted;
A rubber washer that elastically holds the printed wiring board from both sides to the fixing pin;
A backup ring that presses the rubber washer to the printed wiring board;
The fixed pin has the rubber washer abutted on both sides of the printed wiring board and is inserted through the shaft hole of the boss from the backup ring side to elastically hold the printed wiring board. Plate structure. The printed wiring board structure according to claim 9, wherein the casing and the boss are integrally molded. A housing,
A boss having a shaft hole protruding from the housing and recessed at the top,
A bulging portion at the tip, and a fixing pin inserted through the shaft hole of the boss;
A printed wiring board provided with a through hole through which the fixing pin can be inserted;
A rubber washer that elastically holds the printed wiring board from both sides to the fixing pin;
A backup ring that presses the rubber washer to the printed wiring board;
The fixing pin causes the rubber washer to abut both sides of the printed wiring board and is inserted through the shaft hole of the boss from the backup ring side to elastically hold the printed wiring board. . The electronic apparatus according to claim 11, wherein the casing and the boss are integrally molded.

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