JP2009267106A - Connection structure of printed wiring board - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection structure of a printed wiring board capable of confirming a fitting condition with ease. <P>SOLUTION: The connection structure of a printed wiring board has: a connector 4 mounted on a printed circuit board 3, which has an insertion part 40 provided parallel to a plate surface of the printed circuit board 3; a first marker 54 consisting of convex pieces projected and formed from both-side end points adjacent to an outlet 52 of a flexible printed wiring board 5 (FPC); and a second marker 33 provided on a mounting surface of the printed circuit board 3, which enables an operator to recognize whether or not the fitting condition between the FPC 5 and the connector 4 is proper from a positional relation with the first marker 54. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a printed wiring board connection structure, and more particularly to a printed wiring board connection structure that electrically connects a printed circuit board made of a hard material and a flexible printed wiring board via a connector.

A conventional connection structure of this type of printed wiring board is widely known, for example, from Patent Document 1. Such a printed wiring board connection structure is for checking whether a flat cable (flexible wiring board) is correctly inserted into the connector and that the energized state is maintained. The connector and a confirmation window provided in the connector And a flexible wiring board.
JP 2001-307831 A

  However, in the connection structure of the printed circuit board represented by the above-mentioned Patent Document 1, the confirmation window is small, so it is difficult to confirm that the fitting state is not directly above. There is a demerit that it is easy to spend time for confirmation work in the process.

  The present invention focuses on the above-described problems, and an object of the present invention is to provide a connection structure for a printed wiring board that allows easy confirmation of the fitted state.

  In order to solve the above-described problems, the present invention provides a printed circuit board made of a hard material formed by drawing a circuit pattern and an energizing insertion portion provided on the flexible printed wiring board via a connector. In a printed wiring board connection structure, a connector mounted on the printed circuit board and having an insertion portion substantially parallel to a plate surface of the printed circuit board, and both end positions adjacent to the insertion portion of the flexible printed wiring board The flexible printed wiring board and the connector are fitted to each other based on the positional relationship between the first indicator portion, which is formed of a protruding piece protruding from the mounting surface of the printed circuit board, and the first indicator portion. A printed wiring board comprising: a second indicator portion that can recognize whether or not the state is appropriate It is a connection structure.

  By configuring in this way, whether the flexible printed wiring board is fitted to the connector is judged as good or bad with respect to the position of the second indicator portion provided on the printed circuit board made of a hard material. It is possible to easily distinguish visually by comparing the position of the first indicator portion made of convex pieces provided at both side end portions adjacent to the insertion portion of the plate, and during assembly work (manufacturing process) There is an effect that the confirmation work can be shortened compared to the conventional structure.

  According to a second aspect of the present invention, there is provided the printed wiring board connection structure according to the first aspect, wherein the convex piece is integrally formed from both ends of the flexible printed wiring board adjacent to the insertion portion of the flexible printed wiring board. The indicator portion is formed so as to protrude, and a copper foil pattern is formed at the first indicator portion portion.

  By configuring in this way, the strength of the flexible printed wiring board itself can be increased by forming a copper foil pattern on the sheet material of the soft flexible printed wiring board, and the flexible printed wiring board can be inserted into the connector insertion portion. Therefore, it is possible to provide a flexible printed wiring board mounting structure that is easy to assemble.

  According to a third aspect of the present invention, in the printed wiring board connection structure according to the first or second aspect, a reinforcing plate is overlapped on the region of the insertion portion and the region of the first indicator portion of the flexible printed wiring board. It is characterized by being provided together.

  By comprising in this way, it is separately in the area | region of the flexible printed wiring board inserted in a connector, and the area | region of the 1st parameter | index part which consists of the convex piece integrally protruded from the both-ends location of a flexible printed wiring board. Since the provided reinforcing plates are arranged in a superimposed manner, the strength of the flexible printed wiring board itself can be increased, and the insertion portion of the flexible printed wiring board can be fed well into the insertion portion of the connector. A flexible printed wiring board mounting structure that is easy to provide can be provided.

  According to a fourth aspect of the present invention, in the printed wiring board connection structure according to the first aspect, a reinforcing plate is disposed in the region of the insertion portion of the flexible printed wiring board and the portion corresponding to the region of the first indicator portion. It is characterized by being provided.

  By configuring in this way, the strength of the flexible printed wiring board itself can be enhanced by the reinforcing plate, and the flexible printed wiring board insertion portion can be satisfactorily fed into the insertion portion of the connector. A board mounting structure can be provided. At this time, the reinforcing plate is disposed in the region of the first indicator portion, so that the second indicator portion provided on the printed circuit board made of a hard material can be positioned from the convex piece by the reinforcing plate. By comparing and reading the position of the first index part, it is possible to easily determine visually, and there is an effect that the confirmation work at the time of assembly work (manufacturing process) can be shortened compared to the conventional structure. .

  According to a fifth aspect of the present invention, in the printed wiring board connection structure according to any one of the first to fourth aspects, the second indicator portion is formed on the printed circuit board by printing. It is a feature.

  With this configuration, the position of the first index portion made of a convex piece is compared with the second index portion formed by printing on the printed circuit board, so that it can be easily distinguished visually. can do. At this time, since it is only necessary to add a part to the process of printing the arrangement position of the component on the printed wiring board with characters or symbols and to print and form the second indicator part, the addition of the component or the printed wiring board is individually performed. In this manufacturing process, it is possible to easily carry out without adding a post-process.

  According to a sixth aspect of the present invention, in the printed wiring board connection structure according to any one of the first to fourth aspects, the second indicator portion is formed by a wiring pattern provided on the printed circuit board. It is characterized by this.

  With this configuration, it is visually easy to read and compare the position of the first index portion made of a convex piece with respect to the second index portion formed by the wiring pattern provided on the printed wiring board. Can be determined. At this time, it can be formed together with the formation of the wiring pattern by the copper foil drawn around on the printed wiring board, and it is necessary to individually add components or add a post process in the manufacturing process of the printed wiring board. Can be done easily.

  In the present invention, in the printed circuit board connection structure in which the printed circuit board made of the hard material formed by drawing the circuit pattern and the insertion portion for energization provided on the flexible printed circuit board are connected via the connector, the printed circuit A first connector comprising a connector mounted on a substrate and having an insertion portion substantially parallel to a plate surface of the printed circuit board; and a projecting piece protruding from both side end portions adjacent to the insertion portion of the flexible printed wiring board. It is provided on the mounting surface of the indicator portion and the printed circuit board, and can recognize whether or not the fitting state of the flexible printed wiring board and the connector is appropriate from the positional relationship between the first indicator portion. Since the printed wiring board connection structure is characterized by comprising a second indicator portion to the connector, Pass / fail judgment of rewritable printed wiring board is provided at both end positions adjacent to the insertion part of the flexible printed wiring board with respect to the position of the second index part provided on the printed circuit board made of hard material By comparing and interpreting the position of the first index part made of the projected piece, it can be easily visually determined, and the confirmation work during assembly work (manufacturing process) can be shortened compared to the conventional structure. The initial purpose can be achieved.

  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a printed wiring board connection structure as an object of the present invention will be described based on an embodiment applied to a liquid crystal display device for a vehicle based on the attached drawings.

  1 to 4 show an embodiment of a first embodiment of the present invention. FIG. 1 is an exploded perspective view showing an entire structure of a liquid crystal display device including a connection structure of a printed wiring board, and FIG. 1 is a cross-sectional view showing the assembled state of FIG. 1, FIG. 3 is a schematic plan view of a main part showing a connected state of the printed wiring board of FIG. 2, and FIGS. 4 (a) and 4 (b) are views in FIG. It is a top view of the principal part which shows each the state set and connected in the state set appropriately and connected in the state which is not appropriate.

  In the figure, a liquid crystal display device to which the printed wiring board connection structure in the present embodiment is applied comprises a rectangular display panel 1 made of a transmissive liquid crystal display element and a synthetic resin material on which the display panel 1 is supported. A holder 2, a rigid printed circuit board 3 disposed behind the display panel 1, a connector 4 mounted on the printed circuit board 3, and the connector 4 electrically connected to the display panel 1. A flexible printed wiring board 5 that is a flexible wiring board that electrically connects the printed circuit board 3 side and the printed circuit board 3 side, and a display panel 1 that is mounted on the printed circuit board 3 and that includes a liquid crystal display element is viewed from behind. And a light source 6 by a light emitting diode for illuminating.

  A frame-like frame 7 made of a metallic material having a frame-like edge that covers the periphery of the display panel 1 is provided on the front side of the display panel 1.

  The liquid crystal display device is made of a synthetic resin for covering and protecting the printed circuit board 3 and the flexible printed wiring board 5 that is routed and disposed while covering the peripheral portion and the bottom portion of the holder 2. An under cover 8 is provided so that it can be fixedly held while being fitted from below the holder 2.

  The display panel 1 in the liquid crystal display device is composed of, for example, a liquid crystal panel in which liquid crystal molecules are sealed between a pair of glass substrates (two glass substrates), and a plurality of conductive panels connected to the flexible printed wiring board 5 at the ends thereof. Electrode terminals (not shown) are provided.

  Further, the holder 2 is made of a white synthetic resin, and a mounting portion 20 that supports the peripheral edge of the display panel 1 is provided on the front side of the holder 2, and has a divergent shape at a position recessed from the mounting portion 20. When the light guide part 21 is formed and the light source 6 is turned on, for example, by a light emitting diode that emits white light, the irradiation light from the light source 6 side directly or reflects the inner surface part of the light guide part 21 to illuminate the back side of the display panel 1. By illuminating, the display panel 1 is configured to be transmitted and illuminated almost uniformly.

  The printed circuit board 3 is formed of, for example, a hard circuit board made of a glass epoxy material, and is electrically connected to each electrode terminal (not shown) of the display panel 1 through a flexible printed wiring board 5 at a predetermined position. Connected. At this time, a plurality of circuit patterns 30 for supplying drive signals to the display panel 1 are provided on the printed circuit board 3, and a plurality of electrode terminals 31 drawn from the circuit pattern 30 on the printed circuit board 3 and the printed circuit board 3 are printed. A contact terminal 41 provided on the connector 4 mounted on the circuit board 3 is electrically connected, and connected to an electrode terminal 53 of the flexible printed wiring board 5 described later via the contact terminal 41 of the connector 4. It is configured to do. Further, in this embodiment, an external connection electrical connector 32 is provided on the back side of the printed circuit board 3 to be electrically routed to the outside.

  The connector 4 is formed of an insulating material made of synthetic resin, and an insertion portion 40 into which an insertion portion 52 that is an end portion side of a flexible printed wiring board 5 to be described later is inserted is a plate surface of the printed circuit board 30. A plurality of contact terminal portions 41 are provided on the inner side of the insertion portion 40 of the connector 4 while being provided substantially in parallel. The contact terminal portion 41 of the connector 4 is formed so as to be electrically connected to a plurality of electrode terminals 31 formed around the circuit pattern 30 of the printed circuit board 3, and a synthetic resin provided on the connector 4 side. The lock member 42 made of an insulating material is inserted into the insertion portion 40 and the lock member 42 is engaged and fixed to the connector 4, whereby the insertion portion 52 on the end side of the flexible printed wiring board 5 is locked. 42 is configured to be held in the insertion portion 40 of the connector 4.

  The flexible printed wiring board 5 is obtained by forming a desired conductive circuit pattern 51 on a resin film 50 made of synthetic resin such as polyester, which is rich in flexibility, and a conductive conductive circuit pattern between two resin films 50. 51, the resin film 50 is removed from the 52 insertion portions on the end side of the conductive circuit pattern 51, and the electrode terminal portion 53 from which the copper foil portion of the conductive circuit pattern 51 is exposed is removed. Is arranged so as to correspond to the contact terminal portion 41 of the connector 4 and is formed so as to be electrically energized.

  By the way, in the printed wiring board connection structure described above, as a printed wiring board connection structure capable of easily confirming the fitting state between the connector 4 and the flexible printed wiring board 5 in the first embodiment, the following structure is provided. The structure is adopted.

  In the first embodiment, a first index portion 54 made of a convex piece is integrally formed from both side end portions of the resin film 50 adjacent to the insertion portion 52 portion of the flexible printed wiring board 5, and has flexibility. In order to increase the hardness of the film 50, a copper foil pattern 55 is formed at 54 locations of the first indicator portion.

  On the mounting surface of the printed circuit board 3, the insertion portion 52 of the flexible printed wiring board 5 is inserted into the insertion portion 40 of the connector 4, and the flexible printed wiring board 5 is electrically connected in a normal state. The second indicator portion 33 is formed by printing or the like along substantially the outline of the first indicator portion 54 formed on the flexible printed wiring board 5. In this case, the second index portion 33 can be printed on the surface of the printed wiring board 3 by printing the second indicator portion 33 at the same time as the process of printing the arrangement position of the electrical components with characters or symbols.

  The liquid crystal display device including the printed wiring board connection structure in the first embodiment is assembled as follows. The display panel 1 to which the flexible printed wiring board 5 is conductively connected is placed on the mounting portion 20 of the holder 2 in advance, and then a frame-shaped frame 7 having a frame-shaped edge is placed on the holder 1 from the upper side of the display panel 1. The display panel 1 is fixed and held by fitting and fixing the frame-like frame 7.

  Thus, with the display panel 1 fixed to the holder 2, the insertion portion 52 at the other end of the flexible printed wiring board 5 is connected to the insertion portion 40 of the connector 4 mounted on the printed circuit board 3. Then, the lock member 42 is pushed into the insertion portion 40 and the lock member 42 is engaged and held with the connector 4, whereby the electrode terminal portion 53 and the connector 4 provided at the insertion portion 52 of the flexible printed wiring board 5 are connected. The contact terminal portion 41 provided on the inner side of the insertion portion 40 is electrically connected.

  At this time, the first indicator portion 54 made of a protruding piece is integrally formed from both side end portions of the resin film 50 adjacent to the insertion portion 52 portion of the flexible printed wiring board 5, and the first indicator portion 54 portion is formed. By forming the copper foil pattern 55, the strength of the flexible printed wiring board 5 itself can be partially increased, and the insertion part 52 of the flexible printed wiring board 5 can be satisfactorily fed into the insertion part 40 of the connector 4. A flexible printed wiring board connection structure that is easy to assemble can be provided, and since the strength of the first indicator portion 54 is partially enhanced, as a convex piece that operates the first indicator portion 54 It is easy to operate when feeding while supporting, and can be set without damaging the resin film 50 itself.

  Further, whether or not the flexible printed wiring board 5 is fitted to the connector 4 is determined to be good or bad with respect to the position of the second indicator portion 33 provided on the printed circuit board 3 made of a hard material. By visually comparing the position of the first indicator portion 54 made of a convex piece provided by printing at both side end portions adjacent to the insertion portion 52, it can be easily visually determined, and during assembly work ( There is an effect that the confirmation work in the manufacturing process) can be shortened as compared with the conventional structure.

  That is, as shown in FIG. 4A, when the flexible printed wiring board 5 is set on the connector 4 side in an appropriate state, the first indicator portion 54 is provided on the printed circuit board 3. In addition, it is possible to easily determine that there is no positional deviation from the second indicator portion 33, and as shown in FIG. 4B, the flexible printed wiring board 5 is not appropriate and the connector 4 is inclined. In the case where the flexible printed wiring board 5 is inserted on the side, since it is possible to easily determine the positional deviation of the second indicator portion 33 from the first indicator portion 54, the flexible printed wiring board 5 is set again. It can be assembled and fixed in an appropriate state by starting over.

  The liquid crystal display device has a synthetic resin under cover 8 for covering the peripheral surface portion and the bottom surface portion of the holder 2 while protecting the back surface side of the printed circuit board 3 and the flexible printed wiring board 5. The printed circuit board 3 and the flexible printed wiring board 5 can be prevented from coming into direct contact from the outside by being fixedly held while being fitted from the lower side of the holder 2, and mounted on the printed circuit board 3. The electronic component and the flexible printed wiring board 5 can be protected.

  FIGS. 5 to 8 show a second embodiment of the present invention. FIG. 5 is an exploded perspective view showing the entire structure of the liquid crystal display device including the connection structure of the printed wiring board. FIG. FIG. 7 is a schematic plan view of a main part showing a connection state of the printed wiring board of FIG. 6, and FIGS. 7A and 7B are appropriately set in FIG. FIG. 6 is a plan view of the main part showing the connected state and the connected state in an inappropriate state.

  In the same figure, as in the first embodiment described above, a printed wiring board connection structure applied to a liquid crystal display device is shown, and a rectangular display panel 1 composed of a transmissive liquid crystal display element, A holder 2 made of a synthetic resin material on which the display panel 1 is supported, a hard printed circuit board 3 disposed behind the display panel 1, a connector 4 mounted on the printed circuit board 3, and the connector 4 and a flexible printed wiring board 5 that is a flexible wiring board that is electrically connected to the display panel 1 side and the printed circuit board 3 side. Is configured.

  In this second embodiment, the printed circuit board 3 is formed of a hard circuit board made of, for example, a glass epoxy material, and a circuit pattern 30 is provided at a predetermined location on the printed circuit board 3. A plurality of electrode terminals 31 drawn out from the circuit pattern 30 on the printed circuit board 3 and the connector 4 mounted on the printed circuit board 3 are electrically connected, and the flexible printed wiring board 5 is connected via the connector 4. It is configured to be connected to the electrode terminal portion 53.

  The connector 4 is formed of a synthetic resin insulating material, and the insertion portion 40 into which the insertion portion 52 on the end side of the flexible printed wiring board 5 is inserted is substantially parallel to the plate surface of the printed circuit board 30. A plurality of contact terminal portions 41 are provided on the inner side of the insertion portion 40 of the connector 4. The contact terminal portion 41 of the connector 4 is formed so as to be electrically connected to a plurality of electrode terminals 31 formed around the circuit pattern 30 of the printed circuit board 3, and a synthetic resin provided on the connector 4 side. By inserting the lock member 42 made of a material into the insertion portion 40 and engaging and fixing the lock member 42 to the connector 4, the insertion portion 52, which is the end side of the flexible printed wiring board 5, is moved by the lock member 42. The connector 4 is configured to be held in the insertion portion 40.

  The flexible printed wiring board 5 is obtained by forming a desired conductive circuit pattern 51 on a resin film 50 made of synthetic resin such as polyester, which is rich in flexibility, and a conductive conductive circuit pattern between two resin films 50. 51, the resin film 50 is removed from the 52 insertion portions on the end side of the conductive circuit pattern 51, and the electrode terminal portion 53 from which the copper foil portion of the conductive circuit pattern 51 is exposed is removed. Is arranged so as to correspond to the contact terminal portion 41 of the connector 4 and is formed so as to be electrically energized.

  The flexible printed wiring board 5 includes a flexible printed wiring board 5 as a connection structure of the printed wiring board that can easily confirm the fitting state between the connector 4 and the flexible printed wiring board 5 in the second embodiment. A first indicator portion 54A made of a protruding piece is integrally formed from both side end portions of the resin film 50 adjacent to the 52 insertion portions.

  Moreover, the area | region of the back part of the insertion part 52 in which the electrode terminal part 53 in which the copper foil part of the conductive circuit pattern 51 is exposed in the 52 insertion part parts of the flexible printed wiring board 5 is provided, and the 1st which consists of a convex piece. A substantially T-shaped reinforcing plate 9 made of a polyimide resin plate is partially overlapped and pasted in accordance with the area of the indicator portion 54A.

  On the mounting surface of the printed circuit board 3, the insertion portion 52 of the flexible printed wiring board 5 is inserted into the insertion portion 40 of the connector 4, and the flexible printed wiring board 5 is electrically connected in a normal state. The second indicator portion 33A is formed of a copper foil pattern along substantially the outline of the first indicator portion 54A formed on the flexible printed wiring board 5. In the second embodiment, the second indicator portion 33A made of the copper foil portion is formed simultaneously with the step of forming the circuit pattern 30 made of the copper foil portion provided on the surface of the printed wiring board 3.

  Therefore, in the second embodiment, when the flexible printed wiring board 5 is connected to the connector 4 mounted on the surface of the printed circuit board 3, 52 insertion portions on the end side of the flexible printed wiring board 5 are provided. Is inserted into the insertion portion 40 of the connector 4 mounted on the printed circuit board 3, and then the lock member 42 is pushed into the insertion portion 40 to engage and hold the lock member 42 with the connector 4. 5 are electrically connected to the electrode terminal portion 53 provided at the 52 insertion portion 52 and the contact terminal portion 41 provided on the inner side of the insertion portion 40 of the connector 4.

  At this time, in the region of the insertion portion 52 of the flexible printed wiring board 5 and the region of the first indicator portion 54A composed of convex pieces integrally protruding from both side end portions of the resin film 50 adjacent to the insertion portion 52. By sticking the reinforcing plate 9, the strength of the flexible wiring board 5 itself can be partially increased, and the insertion part 52 of the flexible printed wiring board 5 can be satisfactorily fed into the insertion part 40 of the connector 4 for assembly. It is possible to provide an easy connection structure of a flexible printed wiring board, and the strength of the 52 insertion portions and the first indicator portion 54A of the flexible printed wiring board 5 is partially increased. , When feeding and setting while supporting as an operation convex piece for operating the first indicator portion 54A place Operation If easily, it can be held satisfactorily fixed without damaging the resin film 50 itself.

  Further, whether the flexible printed wiring board 5 is fitted to the connector 4 is determined to be good or bad with respect to the position of the second indicator portion 33A provided on the printed circuit board 3 made of a hard material. The position of the first indicator portion 54 made of convex pieces provided at both side end portions adjacent to the insertion portion 52 can be easily discriminated visually and can be easily discriminated during assembly work (manufacturing process). There is an effect that the confirmation work can be shortened compared to the conventional structure.

  That is, as shown in FIG. 8A, when the flexible printed wiring board 5 is set on the connector 4 side in an appropriate state, it is provided on the first indicator portion 54A and the printed circuit board 3. In addition, it is possible to easily determine that there is no positional deviation from the second indicator portion 33A, and as shown in FIG. 8B, the flexible printed wiring board 5 is not appropriate, and the connector 4 is inclined. When the connector is inserted to the side or when the insertion portion 52 is not set at a predetermined position of the connector 4, the second indicator portion 33A can be easily displaced from the first indicator portion 54. Since it can be determined, the flexible printed wiring board 5 can be assembled and fixed in an appropriate state by setting the flexible printed wiring board 5 again.

  9 to 12 show a first embodiment of the present invention. FIG. 9 is an exploded perspective view showing an entire structure of a liquid crystal display device including a connection structure of a printed wiring board. FIG. 10 is a perspective view of FIG. FIG. 11 is a schematic plan view of the main part showing the connection state of the printed wiring board of FIG. 10, and FIGS. 12 (a) and 12 (b) are set appropriately in FIG. It is the top view of the principal part which shows the state connected and connected, and the state set and connected in the state which is not appropriate.

  In the same figure, the connection structure of the printed wiring board applied to the liquid crystal display device is shown in the same manner as each of the embodiments described above. In the third embodiment, only the changes from the first embodiment and the second embodiment will be described. Here, in the flexible printed wiring board 5, a desired conductive circuit pattern 51 is formed by a resin film 50 made of a synthetic resin such as polyester having high flexibility, and a conductive conductive circuit pattern is formed between the two resin films 50. 51 is formed so as to be routed, and electrode terminal portions 53 are provided at 52 insertion portions on the end side of the conductive circuit pattern 51.

  In addition, the reinforcing plate 90 that reinforces the region of the insertion portion 52 of the flexible printed wiring board 5 is formed in a substantially T-shape, and the protrusions 91 at both ends by the T-shaped reinforcing plate 90 are the insertion portions of the flexible printed wiring board 5. The protrusions 91 are provided so as to protrude from both end portions of the resin film 50 adjacent to the 52 portions, and the protruding protrusions 91 serve as the first indicator portions 54 and 54A in the first and second embodiments. It is configured.

  On the mounting surface of the printed circuit board 3, the insertion portion 52 of the flexible printed wiring board 5 is inserted into the insertion portion 40 of the connector 4 so as to be electrically connected in a normal state. The second indicator portion 33A is formed substantially along the contour of the protrusion 91 that also serves as the first indicator portion. In the third embodiment, similar to the second embodiment described above, the second step of forming the copper foil portion simultaneously with the step of forming the circuit pattern 30 including the copper foil portion provided on the surface of the printed wiring board 3 is performed. An index portion 33A is formed.

  Therefore, in the connection structure of the printed wiring board having the above-described configuration, 52 insertion portions on the end side of the flexible printed wiring board 5 are mounted on the printed circuit board 3 in the same manner as the second embodiment described above. The connector 4 is inserted into the insertion portion 40, and then the lock member 42 is pushed into the insertion portion 40 to engage and hold the lock member 42 with the connector 4, thereby providing the insertion portion 52 of the flexible printed wiring board 5. The electrode terminal portion 53 thus formed and the contact terminal portion 41 provided on the inner side of the insertion portion 40 of the connector 4 are electrically connected.

  At this time, the strength of the flexible wiring board 5 itself can be partially increased by overlapping the reinforcing plate 90 having a substantially T shape including the region of the insertion portion 52 of the flexible printed wiring board 5. In addition, the insertion portion 52 of the flexible printed wiring board 5 can be satisfactorily fed into the insertion portion 40 of the connector 4, and a flexible printed wiring board connection structure that can be easily assembled can be provided.

  In addition, since the protrusion 91 also serving as the first indicator portion formed on the reinforcing plate 90 can also function as an operation convex piece for operating the flexible printed wiring board 5, the protrusion 91 of the reinforcing portion 90 is provided. However, it is easy to operate when feeding and setting, and can be fixed and held well without damaging the resin film 50 itself.

  Also, the projections 91 formed by the reinforcing plates 90 provided at both end portions adjacent to the insertion portion 52 on the flexible printed wiring board 5 side also serve as the first indicator portions 54 and 54A in the first and second embodiments. Thus, whether the flexible printed wiring board 5 is fitted to the connector 4 is determined to be good or bad with respect to the position of the second indicator portion 33B provided on the printed circuit board 3 made of a hard material. The side insertion portion 52 and the position of the projection 91 by the reinforcing plate 90 provided at both side end portions adjacent to each other can be easily visually determined by comparing and reading, and during assembly work (manufacturing process) There is an effect that the confirmation work can be shortened as compared with the conventional structure.

  That is, as shown in FIG. 12A, when the flexible printed wiring board 5 is set on the connector 4 side in an appropriate state, the protrusion 91 of the reinforcing plate 90 corresponding to the first index portion location. 12 and the second indicator portion 33A provided on the printed circuit board 3 can be easily discriminated, and as shown in FIG. On the other hand, when the flexible printed wiring board 5 is not appropriate and is inserted obliquely, or when the insertion portion 52 is not set at a predetermined position of the connector 4, a reinforcing plate is provided for the second indicator portion 33A. Since it is possible to easily determine the positional deviation from the 90 protrusions 91, the flexible printed wiring board 5 can be assembled and fixed in an appropriate state by re-setting the flexible printed wiring board 5.

  The present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the gist of the present invention. For example, in each of the embodiments, the flexible printed wiring board 5 is used to electrically draw and form the liquid crystal display device and the hard printed circuit board 3, but the hard printed circuit boards 3 are connected. The flexible printed wiring board 5 may be used, or may be formed by being electrically routed to the outside of the case through the flexible printed wiring board 5, and the insertion portion 40 provided in the connector 4. The flexible printed wiring board 5 is fixedly held by inserting the locking member 42 into the contact terminal portion 41 side by rotating the locking member 42 with respect to the connector 4. The electrode terminal portion 53 may be pressed and held. In some cases, a lock member 42 is provided. It may be electrically connected by holding insert the insertion portion 52 places of the flexible printed wiring board 5 in the insertion portion 40 of the connector 4 without. In addition, as the shape of the first indicator portions 54 and 54A formed of protruding pieces protruding from both side end portions adjacent to the insertion portion 52 of the flexible printed wiring board 5, the description has been made taking a substantially rectangular shape as an example. A shape such as a semicircular shape or a triangular shape or its size may be set as appropriate. In some cases, a second hole is formed by forming a hole or a kerf in the center of the first indicator portions 54 and 54A. It may be configured so that it can be easily visually determined by comparatively reading the position with the index unit 33. Further, the size, shape, thickness, hardness, etc. of the reinforcing plate 9 provided to be overlapped with a part of the flexible printed wiring board 5 are appropriately set according to the situation so that the flexible printed wiring board 5 can be routed satisfactorily. You only need to set it.

FIG. 1 is an exploded perspective view showing an overall structure of a liquid crystal display device including a printed wiring board connection structure according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view showing the assembled state of FIG. FIG. 3 is a schematic plan view of a main part showing a connection state of the printed wiring board of FIG. 4 (a) and 4 (b) are plan views of main parts showing the state of being properly set and connected in FIG. 3 and the state of being set and connected in an inappropriate state. FIG. 5 is an exploded perspective view showing the overall structure of a liquid crystal display device including a printed wiring board connection structure according to a second embodiment of the present invention. 6 is a cross-sectional view showing the assembled state of FIG. FIG. 7 is a schematic plan view of a main part showing a connection state of the printed wiring board of FIG. FIGS. 8A and 8B are plan views of the main parts showing the state of being properly set and connected in FIG. 7 and the state of being set and connected in an inappropriate state. FIG. 9 is an exploded perspective view showing the overall structure of a liquid crystal display device including a printed wiring board connection structure according to a third embodiment of the present invention. 10 is a cross-sectional view showing the assembled state of FIG. FIG. 11 is a schematic plan view of a main part showing a connection state of the printed wiring board of FIG. FIGS. 12A and 12B are plan views of the main parts showing the state of being properly set and connected in FIG. 11 and the state of being set and connected in an inappropriate state.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Display panel 2 Holder 3 Printed circuit board 4 Connector 5 Flexible printed wiring board 6 Light source 7 Frame-shaped frame 8 Under cover 9 Reinforcement board 20 Mounting part 21 Light guide part 30 Circuit pattern 31 Electrode terminal 32 Electrical connector 33 for external connection, 33A 2nd index part 40 Insertion part 41 Contact terminal part 42 Lock member 50 Resin film 51 Conductive circuit pattern 52 Insertion part 53 Electrode terminal part 54, 54A 1st index part 55 Copper foil pattern 90 Reinforcement plate 91 Protrusion part

Claims (6)

In the connection structure of the printed wiring board in which the printed circuit board made of a hard material formed by drawing the circuit pattern and the insertion portion for energization provided in the flexible printed wiring board are connected via a connector,
A connector mounted on the printed circuit board and having an insertion portion substantially parallel to a plate surface of the printed circuit board;
A first indicator portion comprising a protruding piece formed protruding from both side end portions adjacent to the insertion portion of the flexible printed wiring board;
A second circuit is provided on the mounting surface of the printed circuit board, and makes it possible to recognize whether or not the fitting state between the flexible printed wiring board and the connector is appropriate based on the positional relationship with the first indicator portion. An indicator section;
A printed wiring board connection structure characterized by comprising:   The first index portion made of the convex piece is integrally formed from both end portions of the flexible printed wiring board adjacent to the insertion portion of the flexible printed wiring board, and a copper foil pattern is formed at the first index portion location. The printed wiring board connection structure according to claim 1, wherein the printed wiring board connection structure is formed.   3. The printed wiring board according to claim 1, wherein a reinforcing plate is provided to overlap the region of the insertion portion and the region of the first indicator portion of the flexible printed wiring board. Connection structure.   The printed wiring board connection structure according to claim 1, wherein a reinforcing plate is disposed at a position corresponding to the region of the insertion portion and the region of the first index portion of the flexible printed wiring board. .   5. The printed wiring board connection structure according to claim 1, wherein the second index portion is formed on the printed circuit board by printing. 6.   5. The printed wiring board connection structure according to claim 1, wherein the second index portion is formed by a wiring pattern provided on the printed circuit board. 6.

Images