JPH0741173Y2 - Printed wiring board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a printed wiring board, in particular, a battery mounting board.

[Prior Art] Usually, a printed wiring board is formed with the intention of mounting a small weight component such as a semiconductor element or a resistor, and therefore a heavy weight component such as a battery or a transformer is mounted. In addition, heat generated during soldering, shock generated during transfer, and the like cause a warp larger than the substrate allows, and there is a possibility that the wiring pattern may be peeled off or broken.

In order to cope with such inconvenience, the strength of the board is provided with directionality, components are mounted on the board according to this directionality, or the thickness of the board itself is increased to make it stronger.

[Problems to be Solved by the Invention] However, in the method utilizing the directivity of the substrate, for example, the number of mounted AA batteries is about 7 to 8 at the maximum, and the number of mounted batteries is more than that. The size of the board that should be used becomes larger and becomes weaker against the load applied to the board.

On the other hand, the method of increasing the thickness of the board so that the board can withstand the load of the component has many problems in practical use such that the weight of the board itself increases and the manufacturing cost increases significantly.

As a result of consideration for solving such a problem, the present inventor can easily solve all of the above problems by simply attaching a simple strip-shaped reinforcing member on the substrate in advance as necessary. I found out.

The present invention has been made based on the above findings, and an object thereof is to provide a printed wiring board in which warpage of the board due to mounting of heavy components is suppressed as much as possible.

A further object of the present invention is to provide a printed wiring board which is simple in structure, inexpensive to manufacture, and suitable for mounting a large number of batteries.

[Means for Solving the Problems] A printed wiring board 1 according to the present invention has a thin plate shape in which the strength in a predetermined direction of the board is set to be larger than that in a direction orthogonal thereto, as shown in FIG. The rigid substrate 2 is provided with a plurality of batteries 5 and a plurality of strip-shaped reinforcing members 9.

Further, one battery group 6 is provided with a predetermined number of batteries 5 having substantially the same shape in parallel, and a plurality of battery groups 6 are provided on the substrate 2.
The parallel arrangement direction of the batteries 5 in the battery group 6 is substantially aligned with the direction in which the bending strength of the substrate 2 is large, and the parallel direction of the battery group 6 is large in the bending strength of the substrate 2. Make it almost orthogonal to the direction.

On the other hand, the above-mentioned reinforcing member 9 is provided between the battery groups 6 and 6,
One battery is disposed at a position substantially orthogonal to the battery groups and along the opposite side edge of the substrate 2, and is integrally connected to the substrate 2 over substantially the entire width of the substrate 2.

When the battery groups 6 arranged on the substrate 2 are two sets, the reinforcing members 9 are arranged in a substantially H shape on both sides of the substrate 2 and between the battery groups as shown in FIG. It

[Operation] As described above, the reinforcing member 9 is integrally provided at an appropriate position on the substrate 2 in advance, so that the substrate 2 to be performed after that.
Even during a series of operations such as mounting the heavy component 5 on the top, automatic soldering, or carrying, the reinforcing member 9 causes the substrate 2 to move.
The substrate 2 is firmly supported against the warp of the substrate 2 and the accident such as the peeling of the wiring print due to the deformation of the substrate 2 is prevented.

[Embodiment] An example in which the present invention is applied to an auxiliary power supply board that backs up an electronic circuit in case of a power failure will be described below.

The printed wiring board 1 according to the present invention is for mounting various components on the upper surface side of a thin plate-like rigid substrate 2 formed of various insulating materials such as glass epoxy resin as shown in the assembled state of FIG. While the mounting surface 3 is provided, wiring patterns 4 for electrically connecting the components are formed at appropriate positions on the upper and lower surfaces.

The substrate 2 has a substantially rectangular shape, and the strength directionality is set in the vertical direction in FIG.
It is set in advance so that the warp indicated by the alternate long and short dash line in FIG. 3 is likely to occur along the cross-sectional direction.

The mounting surface 3 provided on the substrate 2 has, for example, 10 lithium batteries 5 arranged in parallel as one set of battery groups 6, and the two battery groups 6 are arranged in parallel to form a total of 20 batteries 5. Spaces 3a and 3b are secured so that the above can be arranged. Furthermore, by disposing the batteries 5 so as to match the warp direction of the substrate 2, and fixing the tips of the lead wires 8 extending from both ends of each battery 5 to the mounting holes 7 formed through the substrate 2. The warp of the substrate 2 can be suppressed to some extent by the rigidity of the battery 5 itself.

The present invention is characterized in that a strip-shaped reinforcing member 9 is further provided on the upper surface side of the substrate 2 described above.

As the reinforcing member 9, for example, an L-angle made of aluminum is used, and the substrate 2 is fastened with screws 10 at a plurality of positions at a plurality of points, and the two are integrally coupled to each other.
The reinforcing member 9 supports various stresses such as bending and twisting applied to the substrate 2 to prevent the substrate 2 from being deformed. That is, the substrate 2 is vertically cut in the central vertical direction in FIG.
・ One (9a) between 6 and the board 2 along the front and rear edges of the board 2.
By combining the two (9b and 9c), which are slightly shorter than the lateral width, into a substantially H-shape, the left and right directions, which are relatively weak against bending, are strongly supported by the two reinforcing members 9b and 9c and the battery 5. On the other hand, the front-back direction, which is strong against bending, is supported by one reinforcing member 9a provided in the central portion.

In the printed wiring board 1 described above, a lead wire 11 is further extended from the wiring pattern 4 toward the outside of the board 2, and a plug 12 provided at the tip of the lead wire 11 is provided on the electronic device side socket as shown in FIG. 13 is detachably connected to the board 2
By fixing the four corners to the chassis 15 through the spacers 14 by screws, they are electrically and mechanically coupled to the electronic device side and operate as an auxiliary power source.

The shape of the reinforcing member 9 disposed on the mounting surface 3 is not limited to the L-shaped cross section, but may be a flat plate shape or an inverted T-shaped cross section, which can be appropriately changed and implemented according to the required strength. And, without further separating the plurality of reinforcing members 9a, 9b, 9c,
You may form integrally.

Further, the number of the battery groups 6 mounted on the mounting surface 3 can be increased to 3 or more, and the number of the reinforcing members 9 can be increased or decreased depending on the number and weight of the battery groups 6 or the mounted components 5. Is.

Further, instead of screwing and fixing the reinforcing member 9 to the substrate 2, the reinforcing member 9 may be adhered, or the thickness of the substrate 2 itself may be partially increased in a strip shape.

[Advantages of the Invention] As described above, the present invention includes the strip-shaped reinforcing member 9 in the direction in which the warp of the substrate 2 is cancelled. Therefore, the accident due to the deformation of the substrate 2 due to the mounting of the heavy component 5 can be prevented. .

Further, the heavy component 5 is a battery, and a plurality of battery groups 6 each including a predetermined number of batteries can be mounted.
6 and between the battery groups along the both side edges of the substrate 2 which are substantially orthogonal to each other, one reinforcing member 9 is provided, so that a large number of batteries 5 can be closely mounted. A suitable printed wiring board can be manufactured inexpensively with a relatively simple structure.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an assembled state of a printed wiring board according to the present invention. 2 and 3 show an example in which the present invention is applied to an auxiliary power supply board, FIG. 2 is a plan view showing the entire structure, and FIG. 3 is a front view of FIG. 2 showing a state of attachment to an electronic device. It is the side view seen from the side. 2 ... Board, 3 ... Mounting surface, 5 ... Heavy parts (battery),
6 ... Battery group, 9 ... Reinforcing member.

Claims (2)

[Scope of utility model registration request] 1. A plurality of batteries (5) and a plurality of strip-shaped reinforcements are provided on a thin plate-shaped rigid substrate (2) in which the strength of the substrate in a predetermined direction is set to be larger than the direction orthogonal thereto. A printed wiring board provided with a member (9), in which a predetermined number of batteries (5) having substantially the same shape are provided in parallel is defined as one battery group (6), and a plurality of battery groups (6) are provided. ) Are provided in parallel on the substrate (2), and the parallel direction of the batteries (5) in the battery group (6) is substantially aligned with the direction in which the bending strength of the substrate (2) is large. The parallel direction of the group (6) is made substantially orthogonal to the direction in which the bending strength of the substrate (2) is large, while the reinforcing member (9) is provided between the battery groups (6, 6) and between the battery groups. Substrate (1 each at a position substantially orthogonal to and along the opposite side edges of the substrate (2). Printed circuit board, characterized in that bind to and disposed substrate over substantially the entire width and (2) the integral). 2. The battery group (6) arranged on the substrate (2) is two sets, and the reinforcing member (9) is substantially disposed on both sides of the substrate (2) and between the battery groups. The printed wiring board according to claim 1, wherein the printed wiring board is arranged in an H shape.