JPH0716113B2 - Flexible printed wiring board mounting structure - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a flexible printed wiring board in a device having members that relatively move in parallel with each other, and more specifically, between relative moving members. The present invention relates to a flexible printed wiring board mounting structure in an apparatus having a flexible printed wiring board mounted on a substrate.

BACKGROUND OF THE INVENTION When a flexible printed wiring board (hereinafter abbreviated as FPC board) is mounted between members that move relative to each other, how to deal with slack that occurs in the FPC board when the distance between the members becomes small. Whether to do is an important issue.

Conventionally, various methods have been known as a method of attaching an FPC plate between relative moving members. For example, as a method that the applicant has already implemented, a belt-shaped FPC plate is fixed to two relative moving members and A U-turn portion that moves according to a change in the relative distance between the relative moving members is formed between the fixed points (locking points), and when the relative distance between the members becomes small, the U-turn portion is moved to the U-turn portion. Absorb the slack of the FPC board,
There is a method. In the FPC plate mounting structure according to this method, the slack of the FPC plate between the members is absorbed by the U-turn portion moving in parallel with the relative movement direction of the members, so that the slack of the FPC plate between the members is absorbed. It has advantages such as not requiring a large space for.

However, in an apparatus that needs to be equipped with a large number of FPC plates having the above-mentioned mounting structure, a large amount of moving space is required for the U-turn portion of each FPC plate, so a considerable space is provided around the relative moving members and between the relative moving members. Had to be formed in advance, and as a result, there was a risk of increasing the size of the device.

[Object of the Invention] An object of the present invention is to provide an FP having a U-turn portion as described above.
An object of the present invention is to provide an FPC board mounting structure capable of minimizing the required space of all FPC boards included in the apparatus equipped with a plurality of C boards.

[Outline of the Invention] In the FPC board mounting structure according to the present invention, at least one U
Of the multiple FPC boards with turn parts, at least two or more FPC boards are arranged so as to be aligned in a straight line, and at least two or more U-turn parts of each FPC board move relative to each other. It is characterized in that the FPC plates are attached to the relative moving member so as to overlap each other or gather at one place at a specific time of stroke. According to the FPC board mounting structure of the present invention, it is possible to reduce the installation space of the FPC board and the movement space of the U-turn portion of the FPC board. Therefore, in an apparatus having a plurality of FPC boards, the size of the apparatus is increased. Can be prevented, or the internal space of the device can be effectively used.

Embodiments of the Invention Embodiments of the present invention will be described below with reference to the drawings.

The accompanying drawings show an embodiment in which the FPC board mounting structure of the present invention is applied to an apparatus having at least one or more relative movement mechanism composed of at least two members that relatively move in parallel with each other. FIG. 2 is a schematic view showing a state where the U-turn portions of the FPC plates of each relative movement mechanism are separated from each other, and FIG. 2 is a schematic diagram of a state where the U-turn portions of each FPC plate are assembled.

In FIG. 1, 1 and 2 are relative moving members that relatively move in parallel with each other in the directions of arrows a and b, and 3 is both members 1 and 2.
The FPC is fixed (or locked) at the fixing points 1a and 2a, and the U-turn portion 3a is formed between the fixing points.
Plates 4 and 5 are relative moving members that relatively move in parallel with each other in the directions of arrows c and d, and 6 is fixed to both members 4 and 5 at fixing points 4a and 5a, and a U-turn portion 6a is provided between both fixing points. The formed FPC plate, 7 to 10 are relative movement members that relatively move in parallel with each other in the directions of arrows e to h, 11 is fixed to each member 7 to 10 at fixing points 7a to 10a, and each fixing point FP in which U-turn parts 11a to 11c are formed between
It is a C plate. The members 1 and 2 constitute a first relative movement mechanism 12, the members 4 and 5 constitute a second relative movement mechanism 13, and the members 7 to 10 constitute a third relative movement mechanism 14. There is.

In the FPC board mounting structure of this embodiment, as shown in FIG. 1, the U-turn portions 3a, 6a, 11a, 11b, 11c of the plurality of FPC boards mounted on the plurality of relative movement mechanisms are aligned in a straight line. Since each FPC plate is attached to the relative movement member of each relative movement mechanism so that at least a part of the movement loci of each U-turn portion overlaps with each other, each relative movement member has its own movement stroke. When it comes to a predetermined position, the U-turn portions can be brought into a fitted state with each other as shown in FIG. (It is necessary to consider the movement stroke of each relative moving member and the length of each FPC plate in order to realize the state shown in Fig. 2, but such consideration should be made when designing the device. As is apparent from FIGS. 1 and 2, the FP of the present invention is obvious.
By adopting the C-plate mounting structure, the space required for moving the U-turn part of the FPC plate can be reduced to a fraction of that of the device with multiple FPC plates, thus increasing the size of the device. Can be prevented.

FIG. 3 is a view showing the structure in the case where the FPC plate mounting structure of the present invention is not adopted in the device having the same relative movement mechanism as in FIG. 1, and is shown by the same reference numeral as in FIG. The parts shown are the same members as in FIG. (Note that
FIG. 3 shows a state where the U-turn portions of the FPC board are separated from each other. As is apparent from FIG. 3, when the FPC board mounting structure of the present invention is not adopted, a moving space for the U-turn portion of each FPC board is required separately, so a large space must be provided in the device. The size of the device is inevitable because it must be done.

[Effects of the Invention] As described above, according to the FPC board mounting structure of the present invention, in a device equipped with a plurality of FPC boards having U-turn portions, the space for moving the U-turn portions is reduced. As a result, it is possible to prevent the apparatus from increasing in size and to improve the effective utilization rate of the space in the apparatus.

[Brief description of drawings]

FIG. 1 is a first view of an apparatus adopting the FPC board mounting structure of the present invention.
FIG. 2 is a schematic diagram showing a second state of the device shown in FIG. 1, and FIG. 3 is a schematic diagram showing the first state of the device constructed without adopting the structure of the present invention. It is the schematic which shows a state. 1,2,4,5,7,8,9,10 …… Relative moving member 3,6,11 …… FPC board 1a, 2a, 4a, 5a, 7a, 8a, 9a, 10a …… Fixing point 3a, 6a, 11a, 11b, 11c …… U-turn part

Claims (1)

[Claims] 1. A mounting structure of a flexible printed wiring board in an apparatus comprising a flexible printed wiring board having a U-turn portion, which is locked to members which relatively move in parallel with each other, wherein: At least two U-turn portions are aligned and arranged so that at least a part of the movement loci of each of the plurality of U-turn portions that move relative to each other overlap, and the U-turn portions move relative to each other. A mounting structure for a flexible printed wiring board, characterized in that the flexible printed wiring boards are mounted so as to be in an assembled state at a specific time of a stroke.