JPH0529193U - Reinforcement device for printed wiring boards - Google Patents

Abstract

(57) [Abstract] [Purpose] A printed circuit board reinforcement device for electronic devices that can be installed in a small space by securing the component mounting part of the first printed circuit board (parent substrate) installed in the electronic device. In addition, when inserting the second printed circuit board (small board),
It is an object of the present invention to provide a printed wiring board reinforcing device capable of taking measures against vibration and shock. [Structure] A cabinet 1 is provided with a first reinforcing member 7 for reinforcing the horizontal direction and a second reinforcing member 8 for similarly reinforcing the vertical direction on a parent board 4 provided on a back surface portion 11 of the cabinet 1.
With the configuration provided on the back surface portion 11, the strength of the parent substrate 4 can be improved, and the detachment due to the influence of the small substrate 2 due to vibration or the like can be prevented.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a printed wiring board reinforcement device that does not hinder the printed wiring board, which is the main component of electronic equipment, when the printed wiring board is removed for the purpose of expanding or repairing the printed wiring board for function expansion.

[0002]

[Prior Art]

 It has been strongly demanded that the reliability of the electronic device is not impaired when the first printed wiring board accommodated inside the electronic device is added for maintenance of the function expansion, maintenance and inspection.

A first printed wiring board (hereinafter referred to as a parent board) that supplies control signals and power to a second printed wiring board (hereinafter referred to as a small board) housed inside has the same type. The connectors are mounted at equal intervals in the horizontal and vertical directions, and measures are taken to prevent warpage of the parent board due to heat such as soldering work on the components mounted on the parent board.

Electronic equipment using a conventional reinforcing member for a printed wiring board will be described below.

As shown in FIGS. 7 and 8, a mounting component such as the connector 5 is provided with a hole 114 in advance on the reinforcing plate 110 so that the mounting component and the reinforcing plate 110 do not come into contact with each other to cause electrical breakdown. Is being done.

In some cases, the material of the parent board 4 itself is changed and a material having high rigidity is used to improve the strength (not shown).

In the figure, 3 is a guide rail for positioning and guiding the small board 2 in the cabinet 1, 4 is a parent board for supplying signals and power to the small board 2, and 5 is a parent board 4. A receiving connector provided, 6 is a connector which is provided on the small board 2 and fits into the connector 5, 9 is a screw, 11 is a rear surface of the cabinet 1 and 120 is printed on the rear surface of the main board 4, and the connector 5 This is a pattern for transmitting signals and the like between them.

An assembling method of the electronic device configured as described above will be described with reference to FIG.

A screw 9 is passed through a screw hole 14 provided in the back surface portion 11 of the cabinet 1 and a hole 111 of a reinforcing plate 110 arranged so as to face the screw hole 14 to insert the reinforcing plate 110 into the rear surface portion 11 of the cabinet. Fixed to.

Next, the parent board 4 is fixed to the reinforcing plate 110 by inserting screws 9 into the holes 45 provided in the outer peripheral portion of the mother board 4 and the holes 112 of the reinforcing plate 110 arranged so as to face the hole 45.

The screws 9 are passed through the holes 46 provided at equal intervals between the connectors 5 in the central portion of the parent board 4 and the holes 113 of the reinforcing plate 110 arranged so as to face the holes 46, and The substrate 4 is fixed to the reinforcing plate 110 by increasing the degree of adhesion.

In the connector 5, after inserting a plurality of terminals 51 provided at the end of the connector 5 and arranged side by side into a fitting hole 42 provided in the parent board 4, the terminals 51 are bent in the left-right direction ( In many cases, the legs are bent and temporarily fixed.

As another conventional example, as shown in FIG. 10, there is a method of fixing the support 130 to the inside of the cabinet 1 with the screws 9 from above and below the cabinet 1. However, the small substrate 2, which may come into contact with the components mounted on the small substrate 2, cannot be mounted, and the space becomes narrow.

[0014]

[Problems to be solved by the device]

 However, in the above-described conventional configuration, depending on the impact when inserting and removing the small board 2 and the installation location, the vibration transmitted from the outside weakens the fitting force of the connector portion, which is the connecting means between the parent board 4 and the small board 2, and comes off. In addition, when the small board 2 is taken out from the cabinet 1, it is pulled by the connector 5 provided on the small board 2 and the parent board 4 warps, so that it is already housed in the device. There was a problem that the adjacent small boards 2 were impacted and the connector 5 was detached, and the reaction caused it to pop out of the equipment.

As a countermeasure against these problems, when the central pillar 130 in the cabinet 1 is provided, there is a problem that the small board 2 cannot be accommodated in that portion.

Further, as shown in FIG. 7, it is necessary to fix the reinforcing board 110 to the central portion of the mother board 4 with screws 9 as well, but the connectors 5 are mounted on the mother board 4 at equal intervals. In many cases, the signal lines and the like are often wired in parallel on the parent board 4, but there is a problem in that the signal lines are not routed well in order to avoid them and fix them with screws.

Furthermore, when the number of connectors 5 mounted on the mother board 4 at equal intervals is large or when the intervals between the connectors 5 are small, the number of openings 114 provided on the reinforcing member 110 also increases accordingly. However, there is a problem in that the space between the openings 114 becomes narrower and the strength becomes weaker.

In addition, changing the material of the parent board 4 to improve the strength increases the cost. Furthermore, as a method of mounting the connectors 5 side by side on the parent board 4, the size of the connector 5 is originally changed. Had a problem in that they were large in size and accounted for a large proportion of the cost of the equipment itself.

The present invention solves the above-mentioned conventional problems. From a manufacturing point of view, even if a connector is mounted on a printed wiring board and soldering is performed, it becomes a reinforcement against warping and the like, and is easy to handle. Another object of the present invention is to provide a printed wiring board reinforcing device which is excellent in impact resistance when the small board is inserted and removed and can reinforce the parent board in a small space.

[0020]

[Means for Solving the Problems]

 In order to achieve this object, the present invention is provided with a pair of first reinforcing members for reinforcing the horizontal direction and a plurality of second reinforcing members for reinforcing the vertical direction in the device on the main board. ..

[0021]

[Action]

 With this configuration, the impact when inserting and removing the small board in the cabinet is reduced, and the warp of the parent board due to the heat of the soldering work is prevented.

[0022]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

1 to 6 showing an embodiment of the present invention, the same parts as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

As shown in FIG. 1, the parent board 4 is provided with a first reinforcing member 7, and the back surface 11 of the cabinet 1 is provided with a second reinforcing member 8.

Reference numeral 81 is a bent portion provided on the second reinforcing member 8 and fixed to the back surface portion 11 of the cabinet 1. Reference numeral 82 is provided on the second reinforcing member and contacts the first reinforcing member 7. It is a bending part.

Reference numeral 84 is a flat portion provided on the second reinforcing member 8 to cushion the impact when the small substrate 2 is inserted and removed, and the second reinforcing member 84 is in close contact with the parent substrate 4. 8 is fixed to the back surface portion 11 of the cabinet 1.

A method of fixing the first reinforcing member 7 to the parent board 4 will be described below. As shown in FIGS. 2, 3 and 6, first, as described in the conventional example, the connector 5 is temporarily fixed on the mother board 4, and then the mother board 4 is formed into an L-shaped cross section. Further, the protrusions 71 provided at the end portions of the first reinforcing member 7 are inserted into the plurality of fixing holes 41 provided for positioning the first reinforcing member 7. Since the end surface provided with the protrusion 71 is in close contact with the parent board 4, the lateral direction of the parent board 4 can be reinforced.

Next, the parent board 4, the connector 5, and the first reinforcing member 7 are fixed in this order from the rear surface of the parent board 4 with screws 9.

First, the screw 9 is passed through the plurality of holes 43 provided on the parent board 4, and then the holes 52 are provided at both ends of the connector 5 at the same positions as the holes 43. After passing through, the screw 9 is screwed into and fixed in a plurality of screw holes 72 provided on the first reinforcing member 7.

It should be noted that the pair of first reinforcing members 7 are used to fix the both ends of the connector 5. The method of fixing the second reinforcing member 8 to the back surface portion 11 of the cabinet 1 will be described above.

As shown in FIGS. 4 to 6, the screw 9 is passed through a hole 44 provided on the parent board 4, and screwed into a screw hole 12 provided around the back surface portion 11 of the cabinet 1 to be fixed.

The connector 5 is temporarily fixed to the parent board 4 in advance as described in the conventional example. The plurality of notches 21 provided on the small board 2 and the plurality of bent portions of the second reinforcing member 8 reduce the component mounting restrictions of the small board 2 and the parent board 4, and are considered to be mounted on the cabinet 1. In order to improve the strength of the reinforcing member, the notch 21 and the bent portion are arranged symmetrically in the vertical direction at the center of the second reinforcing member.

Finally, the first reinforcing member 7 and the second reinforcing member 8 are fastened together with the screws 9.

As described above, according to this embodiment, by making the cross-sectional shape of the first reinforcing member 7 L-shaped, the strength is improved and the end face portion is brought into close contact with the parent substrate 4 to improve the strength. Can be improved. Further, by fixing the second reinforcing member 8 and the first reinforcing member 7 with the screws 9, the force when the small board 2 is inserted is buffered, and the connector 5 is fitted when the small board 2 is taken out. It is possible to reduce the bending of the parent board 4 when it is removed.

In addition, since the two first reinforcing members 7 are provided to reinforce the horizontal direction of the parent board 4, and the plurality of second reinforcing members 8 provided to reinforce the longitudinal direction of the parent board 4, Vibration and impact when the small board 2 is inserted can be buffered, and bending of the parent board 4 due to being pulled by the connector 5 provided on the small board 2 when the small board 2 is taken out can be reduced.

Further, by dividing the first reinforcing member 7 and the second reinforcing member 8 into one, the size (length) of the first reinforcing member 7 can be adjusted according to the maximum number of the small substrates 2 that can be accommodated. If the number of small boards 2 accommodated increases due to the expansion of the functions of electronic devices, the number of second reinforcing members 8 attached can be increased to improve the strength according to the specifications at that time.

[0037]

[Effect of the device]

 As is apparent from the above-described embodiments of the invention, the present invention provides a pair of first reinforcing members for reinforcing the horizontal direction and a plurality of second reinforcing members for reinforcing the vertical direction on the main board. Due to the internal configuration, from a manufacturing point of view, even if the connector is mounted on the printed wiring board and soldering is performed, it will be reinforced against warping, etc., and in terms of handling, it will be impact resistant when inserting and removing small boards. It is possible to realize an excellent printed wiring board reinforcement device that is excellent in that it can reinforce the parent board in a small space.

[Brief description of drawings]

FIG. 1 is a perspective view of an electronic device to which a reinforcing member for a printed wiring board according to an embodiment of the present invention is attached.

FIG. 2 is a perspective view showing a state in which a first reinforcing member of the reinforcing device for a printed wiring board is attached to a parent board.

FIG. 3 is an exploded perspective view of FIG.

FIG. 4 is an exploded perspective view of a second reinforcing member and a cabinet of the printed wiring board reinforcing device.

FIG. 5 is an exploded perspective view of a main board of the printed wiring board and a cabinet.

FIG. 6 is a cross-sectional view showing a positional relationship among a small board, a parent board, a first reinforcing member, a second reinforcing member, and a cabinet of the same printed wiring board.

FIG. 7 is a perspective view of an electronic device to which a reinforcing member of a conventional printed wiring board is attached.

FIG. 8 is a perspective view showing the back surface of FIG.

9 is an exploded perspective view of FIG.

FIG. 10 is an electronic device to which a reinforcing member for another conventional printed wiring board is attached.

[Explanation of symbols]

 1 Cabinet 2 Small Board 4 Parent Board 5 Connector 7 First Reinforcement Member 8 Second Reinforcement Member

Claims (1)

[Scope of utility model registration request] 1. An electronic device comprising a first printed wiring board arranged at a rear portion of a body and a second printed wiring board connected to the first printed wiring board via a connecting means. And a printed wiring board provided with a first reinforcing member provided on the first printed wiring board for reinforcing the lateral direction and a plurality of second reinforcing members for reinforcing the longitudinal direction and which can be added. Reinforcement device.