JP6359711B1 - Mounting structure of LCD panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correct the bending of a pin by a simple means even when the pin of a liquid crystal display panel is bent. A mounting structure for a liquid crystal display panel 14 in which the liquid crystal display board 14 is mounted on the wiring board 17 in an upright state by inserting pins 16 led out from the liquid crystal display board 14 into mounting holes 18 of the wiring board 17. A liquid crystal insertion guide 19 having an introduction path 26 for inserting the pin 16 of the liquid crystal display panel 14 into the mounting hole 18 of the wiring board 17 is attached to the wiring board 17, and the introduction path 26 of the liquid crystal insertion guide 19 is connected to the introduction path 26. A guide portion 21 for correcting the bending of the pin 16 of the liquid crystal display panel 14 is provided. [Selection] Figure 1

Description

  The present invention relates to a mounting structure for a liquid crystal display panel that is incorporated in, for example, an electronic watt-hour meter and is mounted in a standing state on a wiring board.

  For example, an electronic watt-hour meter is known as a watt-hour meter that measures and displays the amount of power used by a power consumer such as a general household (see, for example, Patent Document 1).

  This type of electronic watt-hour meter includes a display window for displaying the amount of power. Inside the electronic watt-hour meter, a liquid crystal display panel is disposed corresponding to the display window. As shown in FIGS. 26 and 27, the liquid crystal display panel 14 is mounted on a wiring board 17 built in an electronic watt-hour meter.

  As shown in the figure, the liquid crystal display panel 14 has a rectangular shape, and has a plurality of pins 16 led out from the bottom 15 of the liquid crystal display panel 14 at a predetermined pitch. On the other hand, the wiring board 17 has attachment holes 18 (through holes) formed at the same pitch as the pins 16 of the liquid crystal display plate 14 at the attachment site of the liquid crystal display plate 14.

  In this mounting structure of the liquid crystal display panel 14, the pins 16 led out from the bottom portion 15 of the liquid crystal display board 14 are inserted into the mounting holes 18 of the wiring board 17, and the liquid crystal display board 14 protruding from the back surface of the wiring board 17. By fixing the pins 16 by soldering, the liquid crystal display panel 14 is mounted on the wiring board 17 in an upright state.

JP 2008-157659 A

  By the way, in the mounting structure of the conventional liquid crystal display panel 14 described above, for example, by using an automatic machine, a plurality of pins 16 led out from the liquid crystal display panel 14 are inserted into the mounting holes 18 of the wiring board 17. The liquid crystal display panel 14 is automatically mounted on the wiring board 17.

  Here, the pins 16 of the liquid crystal display panel 14 have a small outer diameter and are led out at a minute pitch. Correspondingly, the mounting holes 18 of the wiring board 17 are also provided with a small pitch and a small pitch.

  Therefore, if the pin 16 of the liquid crystal display panel 14 is slightly bent, it is difficult to insert the pin 16 into the mounting hole 18 of the wiring board 17. In the automatic mounting by the automatic machine, if all the liquid crystal display panels 14 in which the pins 16 are bent are excluded, the product yield is lowered.

  Thus, when the pin 16 of the liquid crystal display panel 14 is bent, it is necessary to correct the bending of the pin 16. Relying on the correction of the bending of the pin 16 depends on the manual labor of the operator, which takes time and reduces work efficiency.

  Accordingly, the present invention has been proposed in view of the above-described problems, and the object of the present invention is to provide a liquid crystal that can correct the bending of the pin by a simple means even when the pin of the liquid crystal display panel is bent. It is to provide a mounting structure of a display board.

  The mounting structure of the liquid crystal display panel according to the present invention has a structure in which the liquid crystal display board is mounted on the wiring board in an upright state by inserting pins led out from the liquid crystal display board into the mounting holes of the wiring board.

As technical means for achieving the above-mentioned object, the present invention provides a liquid crystal having an introduction path for inserting a pin of a liquid crystal display panel into a mounting hole of a wiring board and a wall portion receiving the liquid crystal display panel on the back side thereof. The insertion guide is attached to the wiring board, and a guide portion for correcting the bending of the pin of the liquid crystal display panel is provided in the introduction path of the liquid crystal insertion guide.

  In the present invention, even when the pins of the liquid crystal display panel are bent, the bending of the pins of the liquid crystal display panel can be automatically corrected by the guide portion of the liquid crystal insertion guide. The pins of the liquid crystal display panel corrected by the guide portions can be smoothly inserted into the mounting holes of the wiring board along the introduction path.

  The guide portion in the present invention extends from the back side wall surface of the introduction path for correcting the backward bending of the pins of the liquid crystal display panel and the left and right side wall surfaces of the introduction path so as to expand forward and extends between the pins of the liquid crystal display panel. It is desirable to have a structure that is composed of a front tapered surface on both sides that corrects bending to the left and right so that the pins of the liquid crystal display panel can be inserted from the front of the guide portion.

  Such a structure is particularly effective when the pins of the liquid crystal display panel are inserted from the front of the guide portion of the liquid crystal insertion guide.

  In this case, even if the pin of the liquid crystal display plate is bent backward, the bending of the pin of the liquid crystal display plate can be corrected on the back side wall surface of the introduction path of the guide portion. Further, even if the pins of the liquid crystal display panel are bent in the left-right direction, the bending of the pins of the liquid crystal display panel can be corrected by the front tapered surfaces on both sides of the guide portion.

  The guide portion according to the present invention extends from the back side wall surface of the introduction path to expand upward and corrects the backward bending of the pins of the liquid crystal display panel, and the left and right side walls of the introduction path. It is desirable to have a structure that is composed of an upper tapered surface on both sides that extends so as to expand upward and corrects the bending of the pins of the liquid crystal display plate to the left and right, and that allows the pins of the liquid crystal display plate to be inserted from above the guide portion.

  Such a structure can be applied even when the pins of the liquid crystal display panel are inserted from above the guide portion of the liquid crystal insertion guide.

  In this case, even if the pins of the liquid crystal display plate are bent backward, the bending of the pins of the liquid crystal display plate can be corrected by the back upper taper surface of the guide portion. Further, even when the pins of the liquid crystal display panel are bent in the left-right direction, the bending of the pins of the liquid crystal display panel can be corrected by the upper tapered surfaces on both sides of the guide portion.

  The liquid crystal insertion guide according to the present invention preferably has a structure attached to the wiring board so that the pins of the liquid crystal display panel corrected by the guide portion are arranged in the region of the mounting holes of the wiring board.

  If such a structure is adopted, the liquid crystal display board can be easily attached to the wiring board by an automatic machine by properly defining the positional relationship between the mounting holes of the wiring board, the guide portions of the liquid crystal insertion guide, and the pins of the liquid crystal display board. Can be implemented.

  The liquid crystal display panel or the liquid crystal insertion guide in the present invention is preferably a component supplied by a long strip-shaped taping member.

  Thus, by using the liquid crystal display plate or the liquid crystal insertion guide as a component supplied by the long strip-shaped taping member, it becomes easy to mount the liquid crystal display plate and the liquid crystal insertion guide on the wiring board by an automatic machine.

  According to the present invention, even if the pins of the liquid crystal display plate are bent, the bending of the pins of the liquid crystal display plate can be automatically corrected by the guide portion of the liquid crystal insertion guide. The pins of the liquid crystal display panel corrected by the guide portions can be smoothly inserted into the mounting holes of the wiring board along the introduction path.

  As a result, even if the pins of the liquid crystal display board are bent, the yield of the product is improved by correcting the bent of the pins by a simple means called a liquid crystal insertion guide, and the liquid crystal display board is connected to the wiring board. Assembly workability can be improved.

1 is an exploded perspective view showing a mounting structure of a liquid crystal display panel in an embodiment of the present invention. It is a perspective view which shows the state which assembled | attached the liquid crystal insertion guide of FIG. 1 to the wiring board. It is a perspective view which shows the state which assembled | attached the liquid crystal display panel of FIG. 2 to the wiring board. It is a front view which shows the liquid crystal insertion guide of FIG. It is a top view which shows the liquid crystal insertion guide of FIG. It is an example which mounts a liquid crystal display board on a wiring board from the front of a liquid crystal insertion guide, and is sectional drawing which shows the state before mounting. It is an example which mounts a liquid crystal display board on a wiring board from the front of a liquid crystal insertion guide, (A) is a front view which shows the state in the middle of mounting, (B) is sectional drawing of (A). It is an example which mounts a liquid crystal display board on a wiring board from the front of a liquid crystal insertion guide, and is sectional drawing which shows the state after mounting. It is the schematic which shows an example of the positional relationship of the attachment hole of a wiring board, the introduction path of a liquid crystal insertion guide, and the pin of a liquid crystal display panel. It is another example which mounts a liquid crystal display board on a wiring board from the front of a liquid crystal insertion guide, (A) is a front view which shows the state before mounting, (B) is sectional drawing of (A). It is another example which mounts a liquid crystal display board on a wiring board from the front of a liquid crystal insertion guide, (A) is a front view which shows the state in the middle of mounting, (B) is sectional drawing of (A). It is sectional drawing which shows the state after mounting in the other example which mounts a liquid crystal display board on a wiring board from the front of a liquid crystal insertion guide. It is the schematic which shows the other examples of the positional relationship of the attachment hole of a wiring board, the introduction path of a liquid crystal insertion guide, and the pin of a liquid crystal display panel. It is an example which mounts a liquid crystal display board on a wiring board from the upper direction of a liquid crystal insertion guide, and is sectional drawing which shows the state before mounting. It is an example which mounts a liquid crystal display board on a wiring board from the upper direction of a liquid crystal insertion guide, (A) is a front view which shows the state in the middle of mounting, (B) is sectional drawing of (A). It is an example which mounts a liquid crystal display board on a wiring board from the upper direction of a liquid crystal insertion guide, and is sectional drawing which shows the state after mounting. FIG. 6A is another example of mounting a liquid crystal display panel on a wiring board from above the liquid crystal insertion guide, FIG. 5A is a front view showing a state before mounting, and FIG. FIG. 6A is another example of mounting a liquid crystal display panel on a wiring board from above a liquid crystal insertion guide, FIG. 5A is a front view showing a state in the middle of mounting, and FIG. It is sectional drawing which shows the state after mounting in the other example which mounts a liquid crystal display board on a wiring board from the upper direction of a liquid crystal insertion guide. FIG. 6 is an exploded perspective view showing a mounting structure of a liquid crystal display panel in another embodiment of the present invention. It is a front view which shows the state which assembled | attached the liquid crystal insertion guide of FIG. 20 to the wiring board. It is a front view which shows the state which assembled | attached the liquid crystal display panel of FIG. 21 to the wiring board. It is a top view which shows an example of a taping member. It is sectional drawing which shows an example of a taping member. It is a perspective view which shows the electronic watt-hour meter incorporating the mounting structure of the liquid crystal display panel in embodiment of this invention. It is a perspective view which shows the state before mounting a liquid crystal display board on a wiring board by the mounting structure of the conventional liquid crystal display board. It is a perspective view which shows the state after mounting a liquid crystal display board on a wiring board with the mounting structure of the conventional liquid crystal display board.

  An embodiment of a liquid crystal display panel mounting structure according to the present invention will be described in detail below.

  In the following embodiment, an electronic watt-hour meter that measures and displays the amount of power used by a power consumer such as a general household is exemplified, but the present invention is not limited to an electronic watt-hour meter, and a liquid crystal display panel Can be applied to other electronic instruments having a display unit mounted in a standing state on a wiring board.

  FIG. 25 shows an electronic watt-hour meter incorporating a liquid crystal display panel mounting structure. This watt-hour meter 11 includes a resin casing 12 that houses a wiring board 17 (see FIG. 3) on which a liquid crystal display panel 14 is mounted. A display window 13 is provided on the front surface of the casing 12. Yes. Corresponding to the display window 13, a liquid crystal display panel 14 mounted on a wiring board 17 is disposed.

  As shown in FIG. 1, the liquid crystal display panel 14 has a rectangular shape and includes a plurality of pins 16 that are led out from the bottom 15 of the liquid crystal display panel 14 in an array with a predetermined pitch. On the other hand, the wiring board 17 has attachment holes 18 (through holes) formed at the same pitch as the pins 16 of the liquid crystal display plate 14 at the attachment site of the liquid crystal display plate 14.

  Note that the liquid crystal display panel 14 exemplified in this embodiment has a shape in which the pin 16 led out from the bottom 15 is bent backward and further bent downward as shown in the partial enlargement of FIG. The shape of the pin 16 is an example, and other shapes may be used.

  In this mounting structure of the liquid crystal display panel 14, the pins 16 led out from the bottom portion 15 of the liquid crystal display board 14 are inserted into the mounting holes 18 formed in the wiring board 17, and the liquid crystal display protruding from the back surface of the wiring board 17. The pins 16 of the plate 14 are fixed by soldering. Thereby, the liquid crystal display panel 14 is mounted on the wiring board 17 in a standing state (a state perpendicular to the wiring board 17).

  Here, the pins 16 of the liquid crystal display panel 14 have a small outer diameter and are led out at a minute pitch. Correspondingly, the mounting holes 18 of the wiring board 17 are also provided with a small pitch and a small pitch.

  Therefore, if the pin 16 of the liquid crystal display panel 14 is slightly bent, it is difficult to insert the pin 16 into the mounting hole 18 of the wiring board 17. Therefore, when the pin 16 of the liquid crystal display panel 14 is bent, it is necessary to correct the bending of the pin 16.

  Therefore, in this embodiment, as shown in FIGS. 2 and 3, a liquid crystal insertion guide 19 for correcting the bending of the pin 16 of the liquid crystal display panel 14 is attached to the wiring board 17, and the liquid crystal insertion guide 19 is interposed therebetween. The liquid crystal display panel 14 is mounted on the wiring board 17.

  As shown in FIGS. 4 and 5, the liquid crystal insertion guide 19 includes a flat bottom portion 20 extending in the left-right direction of the liquid crystal display panel 14, a guide portion 21 that stands integrally at a central portion of the bottom portion 20, and a guide for the guide portion 21. This is a resin molded product composed of wall portions 22 located at both left and right ends of the portion 21.

  The bottom 20 of the liquid crystal insertion guide 19 supports the bottom 15 of the liquid crystal display panel 14. The guide portion 21 of the liquid crystal insertion guide 19 corrects the bending of the pin 16 of the liquid crystal display panel 14. The wall portion 22 of the liquid crystal insertion guide 19 receives the liquid crystal display panel 14 on the back side thereof.

  The liquid crystal insertion guide 19 is surface-mounted on the wiring board 17 by soldering. That is, since the liquid crystal insertion guide 19 is a resin molded product, a metal reinforcing plate 23 (see FIGS. 2 and 3) is attached to the lower part of both end surfaces of the bottom portion 20, and liquid crystal insertion is performed using the reinforcing plate 23. The bottom 20 of the guide 19 is fixed to the wiring board 17 by soldering.

  By adopting such an attachment structure, the liquid crystal insertion guide 19 can be firmly and accurately fixed to the wiring board 17. As a result, the liquid crystal display panel 14 can be reliably held in an upright state with respect to the wiring board 17.

  When the liquid crystal insertion guide 19 is mounted, a projection 24 (see FIG. 4) is provided on the bottom surface of the bottom portion 20 of the liquid crystal insertion guide 19 in order to position the liquid crystal insertion guide 19 with respect to the wiring board 17. A hole 25 (see FIG. 1) for insertion is provided in the wiring board 17.

  As shown in FIGS. 4 and 5, the guide portion 21 of the liquid crystal insertion guide 19 includes an introduction path 26 for inserting the pin 16 of the liquid crystal display panel 14 into the mounting hole 18 of the wiring board 17. The introduction path 26 is formed in accordance with the arrangement pitch of the pins 16 of the liquid crystal display panel 14. An introduction hole 27 is formed at the lower end portion of the introduction path 26 so as to penetrate the bottom portion 20.

  The number of introduction paths 26 may be set equal to the number of pins 16 of the liquid crystal display panel 14, but may be set larger than the number of pins 16 of the liquid crystal display panel 14. As a result, it is possible to cope with an increase in the number of pins 16 due to a change in the product type of the liquid crystal display panel 14.

  The guide portion 21 extends from the back side wall surface 28 of the introduction path 26 for correcting the backward bending of the pins 16 of the liquid crystal display panel 14 and the left and right side wall surfaces 29 of the introduction path 26 so as to expand forward. It is comprised by the both-sides front taper surface 30 which correct | amends the bending to the right and left of the pin 16 of the board 14 (refer X part of FIG. 4, and Y part of FIG. 5).

  In this way, by forming the guide portion 21 with the back side wall surface 28 of the introduction path 26 and the both side front tapered surfaces 30 extending from the left and right side wall surfaces 29 of the introduction path 26, the pin 16 of the liquid crystal display panel 14 is connected to the guide portion. 21 can be inserted from the front.

  Further, the guide portion 21 extends from the back side wall surface 28 of the introduction path 26 so as to expand upward, and a back side upper tapered surface 31 that corrects the backward bending of the pins 16 of the liquid crystal display panel 14, and the introduction path 26, the upper and lower side wall surfaces 29 of the liquid crystal display panel 14 are extended from the left and right side wall surfaces 29 so as to expand upward. 5 Y section).

  As described above, the guide portion 21 is constituted by the back upper taper surface 31 extending from the back side wall surface 28 of the introduction path 26 and the both side upper taper surfaces 32 extending from the left and right side wall surfaces 29 of the introduction path 26, whereby the liquid crystal display. The pin 16 of the plate 14 can be inserted from above the guide portion 21.

  Assembly of the liquid crystal display panel 14 to the wiring board 17 using the liquid crystal insertion guide 19 having the above configuration is performed by automatic mounting by an automatic machine in the following manner.

  First, as described above, the liquid crystal insertion guide 19 is assembled to the wiring board 17 in advance. That is, the protrusion 24 of the bottom portion 20 of the liquid crystal insertion guide 19 is fitted into the hole 25 of the wiring board 17. As a result, the liquid crystal insertion guide 19 is placed in a state of being positioned with respect to the wiring board 17.

  In this state, the bottom portion 20 of the liquid crystal insertion guide 19 is fixed to the wiring board 17 by soldering using the reinforcing plate 23 of the bottom portion 20 of the liquid crystal insertion guide 19. As a result, the liquid crystal insertion guide 19 is surface-mounted on the wiring board 17 by soldering.

  In this manner, the liquid crystal display board 14 is mounted on the wiring board 17 by using the liquid crystal insertion guide 19 that is surface-mounted on the wiring board 17. At the time of mounting, (1) when the pin 16 of the liquid crystal display panel 14 is inserted from the front of the liquid crystal insertion guide 19, and (2) when the pin 16 of the liquid crystal display board 14 is inserted from above the liquid crystal insertion guide 19. This will be described in detail below.

  When the liquid crystal display panel 14 is mounted on the wiring board 17, the liquid crystal insertion guide 19 is particularly effective when (1) the pins 16 of the liquid crystal display panel 14 are inserted from the front of the liquid crystal insertion guide 19, (2 This is applicable even when the pin 16 of the liquid crystal display panel 14 is inserted from above the liquid crystal insertion guide 19.

  (1) When inserting the pin 16 of the liquid crystal display panel 14 from the front of the liquid crystal insertion guide 19

  6 to 8 exemplify a procedure for correcting the bending of the pin 16 by the liquid crystal insertion guide 19 when the pin 16 of the liquid crystal display panel 14 is bent backward.

  As shown in FIG. 6, the liquid crystal insertion guide 19 is moved by an automatic machine (not shown) so that the tip of the pin 16 of the liquid crystal display panel 14 is positioned in front of the introduction path 26 of the guide portion 21 of the liquid crystal insertion guide 19. The liquid crystal display panel 14 is arranged with respect to the above.

  When the pins 16 of the liquid crystal display panel 14 are inserted into the introduction path 26 of the guide portion 21 from the front by an automatic machine, as shown in FIGS. It is pressed against the side wall surface 28.

  In this way, the pin 16 is pressed against the back side wall surface 28 of the introduction path 26, whereby the bending of the pin 16 is corrected at the back side wall face 28 of the introduction path 26. The pin 16 whose bending is corrected is arranged in the region (center) of the mounting hole 18 of the wiring board 17.

  That is, as shown in FIG. 9, the liquid crystal insertion guide 19 is wired so that the pin 16 corrected on the back side wall surface 28 of the introduction path 26 is arranged in the region (center) of the mounting hole 18 of the wiring board 17. Positioned on the substrate 17.

  In this way, by properly defining the positional relationship between the mounting holes 18 of the wiring board 17, the introduction path 26 of the liquid crystal insertion guide 19, and the pins 16 of the liquid crystal display board 14, the liquid crystal display board 14 is mounted on the wiring board by an automatic machine. 17 can be easily mounted.

  In this way, the liquid crystal display panel 14 in which the bending of the pin 16 is corrected is moved downward by an automatic machine, so that the pin 16 of the liquid crystal display panel 14 is guided by the liquid crystal insertion guide 19 as shown in FIG. It is smoothly inserted into the mounting hole 18 of the wiring board 14 through the introduction hole 27 of the portion 21.

  On the other hand, FIGS. 10 to 12 illustrate a procedure for correcting the bending of the pin 16 by the liquid crystal insertion guide 19 when the pin 16 of the liquid crystal display panel 14 is bent in the left-right direction (right side in the drawing). The same procedure is performed even when the pin 16 is bent to the left in the drawing.

  As shown in FIGS. 10A and 10B, an automatic machine (not shown) is arranged so that the tip of the pin 16 of the liquid crystal display panel 14 is positioned in front of the introduction path 26 of the guide portion 21 of the liquid crystal insertion guide 19. ) To arrange the liquid crystal display panel 14 with respect to the liquid crystal insertion guide 19.

  When the pins 16 of the liquid crystal display panel 14 are inserted into the introduction path 26 of the guide portion 21 from the front by an automatic machine, the pins 16 bent in the left-right direction are formed on the guide portion 21 as shown in FIGS. It is pressed against both front taper surfaces 30 (right front taper surface in the figure).

  The pins 16 abut against both side wall surfaces 29 (right side wall surfaces) of the introduction path 26 while being guided by the both side front tapered surfaces 30 of the guide portion 21. As a result, the bending of the pin 16 is corrected by the front tapered surfaces 30 on both sides of the guide portion 21. The pin 16 whose curvature is corrected is disposed in the region of the mounting hole 18 of the wiring board 17 (center rightward).

  That is, as shown in FIG. 13, the pins 16 that are corrected by the front tapered surfaces 30 on both sides of the introduction path 26 and abut against the both side wall surfaces 29 (right side wall surfaces) are in the region of the mounting hole 18 of the wiring board 17 (to the center right). The liquid crystal insertion guide 19 is positioned on the wiring board 14 so as to be disposed.

  In this way, by properly defining the positional relationship between the mounting holes 18 of the wiring board 17, the introduction path 26 of the liquid crystal insertion guide 19, and the pins 16 of the liquid crystal display board 14, the liquid crystal display board 14 is mounted on the wiring board by an automatic machine. 17 can be easily mounted.

  In this way, by moving the liquid crystal display panel 14 in which the bending of the pin 16 is corrected downward by an automatic machine, the pin 16 of the liquid crystal display panel 14 is guided by the liquid crystal insertion guide 19 as shown in FIG. It is smoothly inserted into the mounting hole 18 of the wiring board 17 through the introduction hole 27 of the portion 21.

  In addition, when the pin 16 of the liquid crystal display panel 14 is bent forward or is bent in the left-right direction so as to deviate from the allowable range, an image processing function in equipment for performing automatic mounting by an automatic machine Therefore, the liquid crystal display panel 14 in which such bending of the pins 16 occurs is excluded as a defective product.

  (2) When inserting the pin 16 of the liquid crystal display panel 14 from above the liquid crystal insertion guide 19

  14 to 16 exemplify a procedure for correcting the bending of the pin 16 by the liquid crystal insertion guide 19 when the pin 16 of the liquid crystal display panel 14 is bent backward.

  As shown in FIG. 14, an automatic machine (not shown) uses the liquid crystal insertion guide 19 so that the tip of the pin 16 of the liquid crystal display panel 14 is positioned above the introduction path 26 of the guide portion 21 of the liquid crystal insertion guide 19. The liquid crystal display panel 14 is arranged with respect to the above.

  When the pin 16 of the liquid crystal display panel 14 is inserted into the introduction path 26 of the guide portion 21 from above by an automatic machine, as shown in FIGS. 15 (A) and 15 (B), the pin 16 bent backward is located at the back of the guide portion 21. It is pressed against the side upper taper surface 31.

  The pin 16 abuts on the back side wall surface 28 of the introduction path 26 while being guided by the back side upper tapered surface 31 of the guide portion 21. Thereby, the bending of the pin 16 is corrected by the back side upper tapered surface 31 of the guide portion 21. The pin 16 whose curvature is corrected is disposed in the region (center) of the mounting hole 18 of the wiring board 17 (see FIG. 9).

  In this way, by moving the liquid crystal display panel 14 in which the bending of the pin 16 is corrected downward by an automatic machine, the pin 16 of the liquid crystal display panel 14 is guided by the liquid crystal insertion guide 19 as shown in FIG. It is smoothly inserted into the mounting hole 18 of the wiring board 17 through the introduction hole 27 of the portion 21.

  On the other hand, FIGS. 17 to 19 exemplify a procedure for correcting the bending of the pin 16 by the liquid crystal insertion guide 19 when the pin 16 of the liquid crystal display panel 14 is bent in the left-right direction (right side in the drawing). The same procedure is performed even when the pin 16 is bent to the left in the drawing.

  As shown in FIGS. 17A and 17B, an automatic machine (not shown) is arranged so that the tip of the pin 16 of the liquid crystal display panel 14 is positioned above the introduction path 26 of the guide portion 21 of the liquid crystal insertion guide 19. ) To arrange the liquid crystal display panel 14 with respect to the liquid crystal insertion guide 19.

  When the pin 16 of the liquid crystal display panel 14 is inserted into the introduction path 26 of the guide portion 21 from above by an automatic machine, the pin 16 bent in the left-right direction is inserted into the guide portion 21 as shown in FIGS. It is pressed against both upper taper surfaces 32 (right upper taper surface in the figure).

  The pins 16 abut against both side wall surfaces 29 (right side wall surfaces) of the introduction path 26 while being guided by the both side upper tapered surfaces 32 of the guide portion 21. Thereby, the bending of the pin 16 is corrected by the upper tapered surfaces 32 on both sides of the guide portion 21. The pin 16 whose bending has been corrected is disposed in the region of the mounting hole 18 of the wiring board 17 (toward the center right) (see FIG. 13).

  In this way, by moving the liquid crystal display panel 14 in which the bending of the pin 16 is corrected downward by an automatic machine, the pin 16 of the liquid crystal display panel 14 is guided by the liquid crystal insertion guide 19 as shown in FIG. It is smoothly inserted into the mounting hole 18 of the wiring board 17 through the introduction hole 26 of the portion 21.

  In addition, when the pin 16 of the liquid crystal display panel 14 is bent forward or is bent in the left-right direction so as to deviate from the allowable range, an image processing function in equipment for performing automatic mounting by an automatic machine Therefore, the liquid crystal display panel 14 in which such bending of the pins 16 occurs is excluded as a defective product.

  As described above, the liquid crystal display panel 14 in which the bending of the pin 16 is corrected is received by the wall portions 22 positioned at the left and right ends of the guide portion 21 as shown in FIGS. Yes.

  Thereby, even if a pressing force may be applied to the liquid crystal display panel 14 from the display window 13 of the casing 12 of the watt hour meter 11 (see FIG. 25) adjacent to the front of the liquid crystal display panel 14, the pressing force is applied. On the other hand, the back surface of the liquid crystal display panel 14 can be received by the wall portion 22. As a result, the liquid crystal display panel 14 mounted on the wiring board 17 can be prevented from tilting backward.

  In the above embodiment, the case where the liquid crystal insertion guide 19 is surface-mounted by soldering to the wiring board 17 by using the reinforcing plate 23 has been described, but the present invention is not limited to this, and the liquid crystal insertion guide is not limited thereto. 19 may be a structure as shown in FIGS. 20 to 22.

  That is, as shown in FIGS. 20 to 22, hook-like locking claws 33 projecting downward are provided at both ends of the bottom portion 20 of the liquid crystal insertion guide 19, and the locking claws 33 are fitted into the hooks. The holes 34 are provided in the wiring board 17.

  In this structure, the locking claw 33 of the liquid crystal insertion guide 19 is inserted into the locking hole 34 of the wiring board 17, and the locking claw 33 is engaged with the back surface of the wiring board 17. As a result, the liquid crystal insertion guide 19 is fixed to the wiring board 17.

  In the above embodiment, by using the liquid crystal insertion guide 19, the pin 16 of the liquid crystal display board 14 is inserted into the mounting hole 18 of the wiring board 17 and the pin of the liquid crystal display board 14 protruding from the back surface of the wiring board 17. 16 is electrically connected to the wiring board 17 by soldering.

  In addition to this soldering structure, a blade receiving contact is provided in the introduction path 26 of the guide portion 21 of the liquid crystal insertion guide 19, and the pin 16 of the liquid crystal display panel 14 is used as a blade contact for the blade receiving contact of the introduction path 26. It may be a structure to be inserted into. In this case, the blade receiving contact of the introduction path 26 and the wiring board 17 may be electrically connected by an appropriate means.

  By adopting such a structure, the pins 16 of the liquid crystal display panel 14 can be electrically connected to the wiring board 17 via the blade contactor. In this case, soldering between the pins 16 of the liquid crystal display panel 14 and the wiring board 17 becomes unnecessary.

  The liquid crystal display panel 14 and the liquid crystal insertion guide 19 described above are preferably parts supplied by a long strip-shaped taping member 35 as shown in FIGS.

  As shown in the figure, the taping member 35 includes a base member 37 in which a large number of recesses 36 for accommodating the liquid crystal display panel 14 or the liquid crystal insertion guide 19 are formed in the longitudinal direction, and an opening of the recess 36 of the base member 37. And a cover member 38 for closing the cover. The cover member 38 is attached to the base member 37 with, for example, an adhesive.

  The cover member 38 is peeled from the base member 37 while the taping member 35 is pulled out from the reeled state (see the broken line in FIG. 24), so that the liquid crystal display panel is removed from the recess 36 of the base member 37. 14 or the liquid crystal insertion guide 19 is taken out by an automatic machine.

  Thus, the liquid crystal display plate 14 and the liquid crystal insertion guide 19 are mounted on the wiring board 17 by an automatic machine by using the liquid crystal display plate 14 and the liquid crystal insertion guide 19 as components supplied by the long strip-shaped taping member 35. It becomes easy.

  The present invention is not limited to the above-described embodiments, and can of course be implemented in various forms without departing from the gist of the present invention. It includes the equivalent meanings recited in the claims and the equivalents recited in the claims, and all modifications within the scope.

14 Liquid crystal display panel 16 Pin 17 Wiring board 18 Mounting hole 19 Liquid crystal insertion guide 21 Guide part 22 Wall part 26 Introduction path 28 Back side wall face 30 Both sides front taper surface 31 Back side upper taper surface 32 Both sides upper taper surface

Claims (6)

A liquid crystal display panel mounting structure in which the liquid crystal display board is mounted in an upright state on the wiring board by inserting pins derived from the liquid crystal display board into the mounting holes of the wiring board,
An introduction path for inserting the pins of the liquid crystal display panel into a mounting hole of the wiring board and a liquid crystal insertion guide having a wall portion for receiving the liquid crystal display board on the back side thereof are attached to the wiring board, and the introduction path of the liquid crystal insertion guide A mounting structure for a liquid crystal display board, characterized in that a guide portion for correcting the bending of the pins of the liquid crystal display board is provided.   The guide portion extends from the back side wall surface of the introduction path to correct the backward bending of the pins of the liquid crystal display panel and the left and right side walls of the introduction path so as to expand forward, and the pins of the liquid crystal display panel 2. The mounting structure for a liquid crystal display panel according to claim 1, comprising a front tapered surface on both sides that corrects left-right bending, and allows the pins of the liquid crystal display panel to be inserted from the front of the guide portion.   The guide portion extends from the back side wall surface of the introduction path so as to expand upward and corrects the backward bending of the pins of the liquid crystal display panel, and upward from the left and right side walls of the introduction path. 3. The liquid crystal display panel according to claim 1 or 2, further comprising an upper taper surface on both sides that extends so as to expand and corrects the bending of the pins of the liquid crystal display panel to the left and right, and allows the pins of the liquid crystal display panel to be inserted from above the guide portion. A mounting structure of the liquid crystal display board described.   The liquid crystal insertion guide is attached to the wiring board so that the pins of the liquid crystal display panel corrected by the guide portion are arranged in the region of the mounting hole of the wiring board. A mounting structure for a liquid crystal display panel according to claim 1.   The liquid crystal display panel mounting structure according to any one of claims 1 to 4, wherein the liquid crystal display panel or the liquid crystal insertion guide is a component supplied by a long strip-shaped taping member.   The liquid crystal display panel mounting structure according to claim 1, wherein the liquid crystal display panel or the liquid crystal insertion guide is mounted on a wiring board by an automatic machine.

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