JP2013030576A - Board mounting structure and liquid crystal panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a board mounting structure which ensures easy screw-fastening while eliminating the risk of dropping the board, and reducing the assembly cost.SOLUTION: In the board mounting structure, a mounted member 10 is installed so that the mounting surface 11 on which the boards 40A, 40B are mounted becomes vertical. Mounting holes 41, 42 provided in the boards 40A, 40B are matched to the screw holes 21, 31 provided in the board arrangement region in the mounting surface 11 of the mounted member 10, and then screws are driven into these holes. In the board mounting structure, a hook 22 having an engagement protrusion 221 protruding upward is provided at the upper end of the board arrangement region in the mounting surface 11 of the mounted member 10, and an engaging hole 43 into which the hook 22 is inserted is provided at the upper end of the board 40A, 40B.

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substrate mounting structure for mounting a substrate on a mounted member and a liquid crystal panel using the same, and particularly to a substrate mounting structure useful for mounting a substrate on a mounted member installed so that the mounting surface is vertical. And a liquid crystal panel using the same.

  To fix the board, the mounted member is usually installed so that the mounting surface faces upward, and the board is placed in the board mounting area on the mounting surface so that the screw hole of the mounted member and the mounting hole of the board are aligned. After the substrate is aligned within the mounting surface, screws are fixed to these holes.

  For example, Patent Document 1 discloses that, in such a board mounting structure, a hook having a locking projection protruding inward from the outside of the board installation area is provided on the mounting surface of the mounted member. . According to this configuration, the substrate is placed on the mounting surface by returning the other end of the substrate in parallel to the mounting surface while engaging the hook with the one end of the substrate tilted so that one end is low and the other is high. Since it can be positioned within the mounting surface along with the placing work, subsequent screwing can be done easily.

  By the way, when assembling a liquid crystal panel used for a display or the like, display basic parts such as a glass substrate, a diffusion plate, and a backlight are incorporated on one side of the frame, and on the other side (mounting surface) side of the frame. A circuit board on which various components of a drive system and a control system are mounted and other structural parts (for example, a fan) are attached.

  However, with the board mounting structure described above with the mounting surface facing upward, the work space required for assembly is large, and the recent trend of upsizing in the display market has also contributed to this, and the space for the assembly process in the production plant Began to press.

  In order to assemble in a smaller space, when this is done with the frame upright so that the mounting surface is vertical, the direction of gravity acting on the board differs from the direction in which the board is fixed, so the board is attached to the frame. It was necessary to accurately align the substrate position while holding it at a predetermined position on the surface, and screwing was difficult. There was also a risk that the board would be accidentally dropped before screwing. In addition, in order to work efficiently, a plurality of workers are required, and there is a problem that the assembling cost becomes high.

JP 2000-349461 A

  The present invention has been made in view of the above problems, and provides a board mounting structure that can be screwed easily, has no danger of dropping the board, and has low assembly cost, and a liquid crystal panel using the board mounting structure. Objective.

  In the board mounting structure, the mounted member is installed so that the mounting surface for mounting the board is vertical, and the board is provided in the screw hole provided in the board mounting region of the mounting surface of the mounted member. Align the mounting holes and screw these holes. According to the present invention, in this board mounting structure, a hook having a locking projection protruding upward is provided at the upper end of the board mounting region of the mounting surface of the attached member, and the upper end of the board is A locking hole into which each hook is inserted is provided.

  According to the substrate mounting structure of the present invention, the substrate is disposed on the mounting surface of the mounted member by inserting the hook into the locking hole and locking the locking projection on the surface of the substrate. Precisely and stably held in the installation area.

  According to the present invention, it is not necessary to adjust the position of the substrate, and screwing can be easily performed. Moreover, there is no danger of dropping the substrate. In addition, the assembly cost is low because the work can be done by one person.

It is a schematic perspective view which shows the board | substrate attachment structure of the back surface of the liquid crystal panel which concerns on embodiment of this invention. It is an expansion perspective view which shows one of a pair of 1st fixing | fixed part which has the hook formed in the attachment surface of the flame | frame of the said liquid crystal panel. It is an expansion perspective view which shows the other of a pair of 1st fixing | fixed part which has the hook formed in the attachment surface of the flame | frame of the said liquid crystal panel. It is a sectional side view of the principal part explaining a mode that a hook of a frame of the above-mentioned liquid crystal panel is inserted in a stop hole of a substrate. It is a sectional side view of the principal part explaining the state which inserts a mode that the hook of the flame | frame of the said liquid crystal panel is latched to the surface of a board | substrate. It is side sectional drawing of the principal part which shows the state with which the board | substrate was hold | maintained in parallel with the attachment surface of the flame | frame of the said liquid crystal panel. It is the schematic explaining the positional relationship of a hook and a locking hole in the state with which the board | substrate was hold | maintained at the flame | frame, when the shape of the locking hole of a board | substrate is circular or an ellipse. FIG. 8 is a schematic diagram illustrating a state in which the vertical and horizontal directions of the frame are reversed with respect to FIG. 7. It is the schematic explaining the positional relationship of a hook and a locking hole in the state by which the board | substrate was hold | maintained at the flame | frame, when the shape of the locking hole of a board | substrate is a rectangle. FIG. 10 is a schematic diagram illustrating a state in which the vertical and horizontal directions of the frame are reversed with respect to FIG. 9. It is an expansion perspective view which shows the other Example of the 1st fixing | fixed part which has the hook formed in the attachment surface of the flame | frame of the said liquid crystal panel. It is an expansion perspective view which shows the further another Example of the 1st fixing | fixed part which has the hook formed in the attachment surface of the flame | frame of the said liquid crystal panel.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The board mounting structure of the present invention relates to a board mounting structure useful for mounting a board on a member to be mounted so that the mounting surface is vertical. The mounted member is installed so that the mounting surface for mounting the board is vertical, and the mounting hole provided in the board is aligned with the screw hole provided in the board mounting area of the mounting surface of the mounted member. These screws are screwed. Hereinafter, an example in which the present invention is applied to a liquid crystal panel will be described with reference to the drawings.

  FIG. 1 is a schematic perspective view showing a substrate mounting structure on the back surface of a liquid crystal panel according to an embodiment of the present invention. A liquid crystal panel 1 according to an embodiment of the present invention includes a glass substrate, a diffusion plate, a backlight, and the like on one side of a frame (attached member) 10 made of sheet metal (a rear surface that does not appear on the paper surface in FIG. 1). A circuit board in which basic parts (not shown) for display are incorporated, and various parts of the drive system and the control system are mounted on the other surface 11 of the frame 10 (the front surface shown in FIG. 1 is a mounting surface). (Hereinafter simply referred to as a substrate) 40A and 40B are attached. The substrates 40A and 40B are disposed on the left and right sides of the horizontally long liquid crystal panel 1, respectively.

  In the present embodiment, each process of assembling the liquid crystal panel 1 is performed in a state where the frame 10 is erected so that the mounting surface 11 is vertical, in order to suppress an increase in the space of the assembly process due to an increase in the size of the liquid crystal panel. Fixing the substrates 40A and 40B is one process.

  First fixing portions 20 </ b> A and 20 </ b> B are respectively provided on both side ends of the upper end portion of the substrate placement region of the mounting surface 11 of the frame 10. 2nd fixing | fixed part 30 and 30 (only one is shown in FIG. 1) are provided in the both ends of the lower end part of the board | substrate arrangement | positioning area | region of the attachment surface 11 of the flame | frame 10.

  The first and second fixing portions are formed one step higher than the mounting surface 11 of the frame 10. The substrates 40A and 40B are attached to the frame 10 with the four corners of the back surface in contact with the first and second fixing portions and floating from the attachment surface 11. Thereby, a space for heat dissipation is formed between the boards 40A and 40B and the mounting surface 11 of the frame 10, and the frame 10 is prevented from being overheated by heat generated from the boards 40A and 40B.

  FIG. 2 is an enlarged perspective view showing the left first fixing portion 20A, and FIG. 3 is an enlarged perspective view showing the right first fixing portion 20B. As shown in FIGS. 2 and 3, the first fixing portions 20 </ b> A and 20 </ b> B can be easily formed by raising the mounting surface 11 of the frame 10 and can be integrally formed with the frame 10. The method of forming the first fixing portions 20A and 20B is not limited to cutting and raising, and for example, the first fixing portions 20A and 20B may be formed by pressing as shown for the first fixing portion 20A in FIG.

  The first fixing portions 20 </ b> A and 20 </ b> B have a support surface 12 that is one step higher than the mounting surface 11 of the frame 10 and formed in parallel. The same applies to the second fixing portion 30 (see FIG. 1).

  Screw holes 21 and hooks 22 are provided on the support surface 12 of the first fixing portions 20A and 20B. In the present embodiment, the positional relationship between the screw hole 21 and the hook 22 in the support surface 12 is arranged vertically so that the hook 22 is on the top and the screw hole 21 is on the bottom, as shown in FIGS. Has been. Note that the positional relationship between the two is not limited to this, and for example, as shown in FIG. 11, the top and bottom may be interchanged, or as shown in FIG.

  Similarly, the second fixing portion 30 has a support surface that is formed one step higher and parallel to the mounting surface 11 of the frame 10, and a screw hole 31 is provided on the support surface.

  As shown in FIGS. 2, 3, 11, and 12, the hook 22 is formed of a thin piece extending vertically. The direction in which the hook 22 extends coincides with the direction of gravity acting on the substrates 40A and 40B. The hook 22 has a locking protrusion 221 that protrudes so as to extend the thin piece upward.

  Refer to FIG. 1 again. The substrates 40A and 40B are rectangular. Circuits are formed on the surfaces of the substrates 40A and 40B (the front surface appearing on the paper in FIG. 1), and various components are mounted. Two attachment holes 41 and two locking holes 43 are provided on both side ends of the upper ends of the substrates 40A and 40B corresponding to the screw holes 21 and the hooks 22 of the first fixing portions 20A and 20B. Two attachment holes 42 are provided on both side ends of the lower end portions of the substrates 40A and 40B corresponding to the screw holes 31 of the second fixing portion 30.

  Next, the board mounting operation of the present invention configured as described above will be described with reference to side cross-sectional views of essential parts in FIGS. First, as shown in FIG. 4, the boards 40A and 40B are inclined and the hooks 22 of the first fixing portions 20A and 20B are inserted into the corresponding locking holes 43 of the boards 40A and 40B. The hole diameter L2 of the locking hole 43 of the substrates 40A and 40B is set to be slightly larger than the distance L1 connecting the lower side and the opposite corner of the locking protrusion 221 of the hook 22, and interferes with the substrates 40A and 40B. It can be inserted smoothly.

  Thereafter, the substrates 40A and 40B are returned in parallel to the mounting surface 11 of the frame 10 as indicated by an arrow R in FIG. 5, so that the locking projections 221 of the hooks 22 become the surfaces of the substrates 40A and 40B as shown in FIG. The substrates 40 </ b> A and 40 </ b> B are temporarily fixed (held) to the frame 10. It is possible to reduce the diameter of the locking hole 43 by rounding off the opposite corner of the locking protrusion 221 by chamfering. However, if the rounding is too large, the effect of temporary fixing is impaired.

  Thus, in a state where the substrates 40A and 40B are temporarily fixed to the frame 10, it is unnecessary for the operator to hold the substrates 40A and 40B by hand. Moreover, since the screw holes 21 and 31 of the mounting surface 11 of the frame 10 and the mounting holes 41 and 42 of the substrates 40A and 40B are naturally aligned, if the screws 50 are mounted using the mounting holes 41 and 42 of the substrate as targets, It is not necessary to adjust the positions of the substrates 40A and 40B for screwing.

  Note that the shape of the locking holes 43 of the substrates 40A and 40B may be a square or the like, not a circle or an ellipse, but a circle or an ellipse is preferable in consideration of the accuracy of temporary fixing as described below. .

  That is, if the locking hole 43 is circular or elliptical, when the horizontally long liquid crystal panel 1 is installed horizontally as shown in FIG. 7A, as shown in the enlarged view of the main part of FIG. Since the vertical width H of the locking hole 43 becomes narrower as it goes to the left and right, temporary fixing is performed with high accuracy so that the upper end of the hook 22 is positioned at the apex of the locking hole 43 by the weight of the substrate 40A. Even if the vertical and horizontal directions of the liquid crystal panel 1 are reversed as shown in FIG. 8A, the horizontal width W of the locking hole 43 goes upward as shown in the enlarged view of the main part in FIG. 8B. Since it is so narrow, it stops at the substantially central portion of the locking hole 43 with the width of the hook 22, and there is not much decrease in the accuracy of temporary fixing.

  On the other hand, when the locking hole 43 is square, when the horizontally long liquid crystal panel 1 is installed horizontally as shown in FIG. 9 (A), as shown in the enlarged view of the main part of FIG. The vertical width H of the stop hole 43 is constant, and the hook 22 is liable to shift to the left and right. Further, as shown in FIG. 10A, when the vertical and horizontal directions of the liquid crystal panel 1 are reversed, the horizontal width W of the locking hole 43 is constant as shown in the enlarged view of the main part of FIG. The substrates 40A and 40B are temporarily fixed by being shifted downward due to their own weight. For this reason, the precision of temporary fixing falls.

  The above description of the embodiment is to be considered in all respects as illustrative and not restrictive. The scope of the present invention is shown not by the above embodiments but by the claims. Furthermore, the scope of the present invention is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

1 ... Liquid crystal panel 10 ... Frame (attached member)
DESCRIPTION OF SYMBOLS 11 ... Mounting surface 12 ... Support surface 20A, 20B ... 1st fixing | fixed part 21, 31 ... Screw hole 22 ... Hook 221 ... Locking protrusion 30 ... 2nd fixing | fixed part 40A, 40B ... Board | substrate 41, 42 ... Mounting hole 43 ... engagement Stop hole 50 ... Screw

Claims (7)

The mounted member is installed so that the mounting surface for mounting the board is vertical, and the mounting hole provided in the board is aligned with the screw hole provided in the board mounting area of the mounting surface of the mounted member. In the board mounting structure for screwing these holes,
A hook having a locking projection protruding upward is provided at the upper end of the mounting area of the mounting surface of the mounted member, and the locking hole into which the hook is inserted is formed at the upper end of the board. A board mounting structure characterized in that is provided.   The board mounting structure according to claim 1, wherein the hook is formed in a thin piece extending vertically, and the locking projection is formed to extend the thin piece upward.   The board mounting structure according to claim 2, wherein a corner of the hook opposite to the locking projection is chamfered.   The board mounting structure according to claim 2 or 3, wherein the locking hole is circular or elliptical.   The board mounting structure according to any one of claims 1 to 3, wherein the screw hole and the hook are provided in a fixing portion formed on the mounting surface of the mounted member one step higher than the mounting surface.   The board mounting structure according to claim 5, wherein the fixing portion is formed by cutting and raising the mounting surface of the mounted member.   A liquid crystal panel, wherein a circuit board is attached to a frame by the board attachment structure according to claim 1.

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