JPH0346514Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> This invention generally relates to a structure for mounting circuit elements on a flexible substrate used in electronic equipment and the like.

<Prior Art> In general, as electronic devices become smaller and lighter, flexible substrates are used as printed wiring boards that can be bent and installed in narrow device spaces and can streamline wiring. When attaching circuit elements such as LEDs to this flexible board, the attachment strength was not sufficient to allow the circuit elements to stand on their own through electrical connections such as soldering, and the installation work was complicated. .

For this reason, in order to attach a circuit element to such a flexible board, as shown in FIG. The flexible mounting member 23 is made to face the circuit patterns 11 and 13 formed on the flexible substrate 6, and the flexible mounting member 23 and the flexible substrate 6 are connected to the upper support member 20 and the lower support member 20. The circuit element 1 is mounted and electrically connected to the circuit patterns 11 and 13 by interposing and press-contacting the circuit element 1 with the member 22. Generally, the mounting position of the circuit element 1 is defined by the guide hole 21 provided in the upper support member 20, and the circuit element 1 is erected.

<Problems to be solved by the invention> However, although the structure for mounting circuit elements on a flexible board with such a conventional configuration has solved the problem of mounting strength to the flexible board 6, the leg parts 2 of the circuit element 1, 4, flexible mounting member 2
The work of fitting 3 is cumbersome, and the electrical resistance of the flexible mounting member 23 varies depending on the fitting method, so there is a risk that the circuit element 1 may not operate properly. Ta.

Further, the flexible mounting member 23 is positioned to the circuit patterns 11 and 13 on the flexible substrate 6 by being clamped between the upper and lower support members 20 and 22, and furthermore, the flexible mounting member 23 is held between the upper and lower support members 20 and 22, and Since the relationship with 22 is relative, the positioning and mounting work of the circuit elements is still complicated.

<Purpose of the invention> The purpose of this invention is to be able to position a circuit element at an accurate position on a flexible substrate, and also to make the circuit element independent on the flexible substrate by utilizing the flexibility of the flexible substrate, and to solve the problem of the conventional example described above. The present invention provides a mounting structure in which a circuit element can be mounted on a flexible substrate by a simple mounting operation without mounting the circuit element due to the relative relationship between the upper support member and the lower support member.

<Means for Solving the Problems> This invention was devised to solve the above problems, and includes a flexible substrate on which a predetermined circuit pattern including at least one pair of terminal portions is formed, and a circuit pattern formed on each terminal portion. A mounting structure for mounting a circuit element having a pair of legs to be connected, the mounting structure being formed near the terminal section of the flexible substrate, each leg section being sewnable, and connecting the legs and the terminal section. A plurality of positioning holes are formed to position and fix the flexible substrate in a connected state, and after the leg is inserted from one side to the other side through one positioning hole of the flexible substrate, it is inserted through the other positioning hole. A structure for mounting circuit elements on a flexible board that is inserted into one side of the board rather than the other.

<Function> This device is constructed as described above, and the bent portions of the pair of legs of the circuit element are inserted in the shape of a sewing insert from one positioning hole to the other positioning hole. , the tip portions of the bent portions are electrically connected at the terminal portions.

At this time, the base and tip of the bent portion are supported by the upper surface of the flexible substrate, and the central portion thereof is elastically pressed against the lower surface of the flexible substrate between the two positioning holes, and is restrained by the upper and lower sides.

Due to this restraint, the circuit element is supported with its bent part parallel to the surface of the flexible board, and its mounting position is defined by the positioning hole and the electrical connection with the terminal part, and the circuit element is free-standing on the flexible board. Installation is performed by

<Example> Hereinafter, an example of this invention will be described based on the drawings. Fig. 1 is a front view showing an embodiment of this invention, Fig. 2 is a plan view thereof, Fig. 3 is an enlarged sectional view of section A in Fig. 1, and Fig. 4 is an arrow indicated by the line A--A in Fig. 2. FIG. As shown in FIG. 1, a flexible substrate 6 is installed in a substantially planar shape inside a box (not shown) of the device.

In the embodiment, the flexible substrate 6 has a copper foil laminated on a base film made of flexible polyester or polyimide, and a circuit pattern 1 is formed on this by a known method such as etching.
1 and 13 to form a predetermined circuit.

This flexible substrate 6 has terminal portions 12 and 14 continuous to the circuit patterns 11 and 13 at predetermined positions.
is formed in the terminal portion 12, and positioning holes 7, 8 of a predetermined diameter through which the bent portion 3 of the circuit element 1, which will be described later, can be inserted are formed near the terminal portion 12 at a predetermined interval so as to be in line with the terminal portion 12. It is drilled at the same time. In addition, positioning holes 9 and 10 of a predetermined diameter are bored in the terminal portion 14 at a predetermined interval so as to be in line with the terminal portion 14, as described above. and,
The terminal portion 12 and the positioning holes 7 and 8 and the terminal portion 14 and the positioning holes 9 and 10 are provided in parallel with each other at a predetermined interval.

In the embodiment, the circuit element 1 consists of an LED having a pair of legs 2 and 4, and the legs 2 and 4 are connected to a bent base 3.
a, 5a are bent substantially at right angles in parallel in the same direction to form bent portions 3, 5.

This circuit element 1 is constructed by inserting the bent portions 3 and 5 into the positioning holes 7 and 9 from the upper surface of the flexible substrate 6, and then inserting them into the positioning holes 8 and 10 from the lower surface of the flexible substrate 6 in a sewn-in manner. do. Then, the tip portions 3c, 5c of the bent portions 3, 5 reach the terminal portions 12, 14, respectively, and the tip portions 3c, 5c reach the terminal portions 12, 14, respectively.
c are soldered to the terminal portions 12 and 14 using low-temperature solder 15 or the like to be electrically connected.

In this way, the required number of circuit elements are held by the required number of positioning holes on the flexible substrate 6.
mounted on top.

In addition, the circuit element 1 is positioned in the vertical direction in FIG. 2 by the set position of the positioning hole, and similarly in the left and right direction, it is positioned by the set position of the positioning hole and the length of the bent part. . Furthermore, the height of the circuit element 1 is determined by the lengths of the legs 2 and 4, and can be adjusted at will.

FIG. 5 is a plan view showing another embodiment of the present invention, which is the same as the first embodiment except for the structure of the bent portion which is bent in the opposite direction.

That is, the leg portions 2 of the circuit element 1 of this second embodiment,
4 is bent at a substantially right angle in a direction perpendicular to a line connecting the bases of the legs 2 and 4, and in opposite directions at the bending bases 3a and 5a, respectively, to form bent portions 3 and 5. ing. In addition, in the flexible substrate 6, corresponding to the formation of the bent portions 3 and 5,
Terminal part 12, positioning holes 7 and 8, and terminal part 1 which are connected in the same way as in the first embodiment.
4. Positioning holes 9 and 10 are formed at predetermined positions, respectively.

Then, the bent portion 3 of the circuit element 1 is inserted into the positioning hole 7.
and 8 in the shape of a sewing insert, and then the bent part 5
are inserted into the positioning holes 9 and 10 in the form of sewing inserts, and then the tip portions 3c and 5c of the bent portions 3 and 5 are placed on the terminal portions 12 and 14, respectively.
and the terminal portions 12 and 14 are electrically connected to each other.

In this embodiment, the circuit element 1 is stably made self-supporting by the bent portions 3 and 5 which are bent in opposite directions.

FIG. 6 is a plan view showing a third embodiment of this invention, which is the same as the first embodiment except for the structure of the bending part which is bent in the opposite direction and has a bending part. be.

That is, the legs 2 and 4 of the circuit element 1 of this embodiment
The bent base 3 is placed on the line connecting the bases of the legs 2 and 4.
At a and 5a, bent portions 3 and 5 are formed by bending at substantially right angles in opposite directions, respectively. The bent portions 3 and 5 include bent base portions 3a,
Bent portions 3b and 5b are provided adjacent to 5a and alternately project in the vertical direction in FIG. In addition, in the flexible substrate 6, corresponding to the formation of the bending parts 3 and 5, terminal parts 12 and positioning holes 7 and 8 are provided in series as in the first embodiment.
Terminal portions 14 and positioning holes 9 and 10, which are also connected in series, are formed at predetermined positions, respectively.

Then, the bent portion 3 of the circuit element 1 is inserted into the positioning hole 7.
and 8 in the shape of a sewing insert, and then the bent part 5
are inserted into the positioning holes 9, 10 in the form of sewing inserts, and then the tip portions 3c, 5c of the bent portions 3, 5 are placed on the terminal portions 12, 14, respectively, and the tip portions 3c, 5c and the terminal portion 12, 14 are electrically connected to each other.

In this embodiment, the circuit element 1 is stably made self-supporting by the bent portions 3 and 5 formed in opposite directions and the bent portions 3b and 5b provided on the bent portions 3 and 5.

<Effects of the invention> As explained above, the mounting structure of the circuit element on the flexible board of this invention is such that the bent part formed on the leg of the circuit element is formed near the terminal part provided on the flexible board. The circuit element is inserted into the multiple positioning holes in the shape of a sewing insert, and the circuit element is positioned and fixed on the flexible board with the leg part and terminal part electrically connected through the bent part and the positioning hole. Since the circuit element is configured to do this, it is possible to accurately determine the mounting position of the circuit element, and it is also possible to stably stand up on the flexible substrate.

In addition, since the bent portions of the circuit elements are sewn into the positioning holes of the flexible substrate and are restrained and supported, a mounting member is not required for mounting, and the circuit elements can be easily mounted. Even in a structural part where there are no supporting members on both the upper and lower sides, the circuit element can be stably made to stand on its own on the flexible substrate, and the degree of freedom in device design is therefore greatly expanded.

Furthermore, since no mounting member such as conductive rubber is used to connect the legs of the circuit element and the terminals,
Since the electrical conductivity at the connection part is improved and becomes constant, a stable electrical connection can be made. Therefore, when the circuit element is an LED, its luminous intensity can be made constant.

In addition, since soldering can be performed while the circuit elements are supported on the flexible board, the complexity of the soldering work, which requires special care to prevent damage to the flexible board such as peeling of the circuit pattern due to heating, is reduced, and the installation work is simple. As a result, work efficiency is improved, the defective rate is reduced, and circuit elements can be mounted with uniformity, which has extremely large effects.

[Brief explanation of the drawing]

Fig. 1 is a front view of the mounting structure for circuit elements on a flexible board according to an embodiment of this invention, Fig. 2 is a plan view thereof, Fig. 3 is an enlarged sectional view of section A in Fig. 2 is a sectional view taken along the line A--A, FIG. 5 is a plan view showing a second embodiment of this invention, and FIG. 6 is a plan view showing a third embodiment.
FIG. 7 is a sectional view showing a conventional structure for mounting circuit elements on a flexible substrate. 1...Circuit element, 2, 4...Legs, 3, 5...
Bending portion, 6...Flexible substrate, 7, 8, 9,
10... Positioning hole, 11, 13... Circuit pattern, 12, 14... Terminal portion.

Claims (1)

[Claims for Utility Model Registration] A mounting structure for attaching a circuit element having a pair of legs connected to each of the terminal portions to a flexible substrate on which a predetermined circuit pattern including at least one pair of terminal portions is formed. , a plurality of positioning holes are formed near the terminal portion of the flexible substrate, each of the leg portions can be sewn into the flexible substrate, and a plurality of positioning holes are formed for positioning and fixing the leg portions and the terminal portion in a connected state; The legs are inserted from one side to the other side through one positioning hole of the flexible substrate, and then inserted from the other side to one side through another positioning hole. Mounting structure for circuit elements on flexible boards.