JP4606174B2 - Mounting structure of liquid crystal display device - Google Patents

Description

The present invention relates to a mounting structure for a liquid crystal display device provided, for example, in a meter unit of an automobile .

  In recent years, there has been a liquid crystal display device provided with a liquid crystal main body for displaying characters, numbers, designs, etc. in an automobile meter unit, and this liquid crystal display device is provided on the back of a through hole provided in a dial or the like. The holder that is disposed and supports the liquid crystal main body is attached to the circuit board, and is positioned and arranged at a predetermined position.

FIG. 7 shows an example of a structure for attaching a liquid crystal display device to a circuit board. In the prior art, a plurality of legs 3 provided separately from each other on a holder 2 that supports a liquid crystal body 1 are provided on a circuit board 4. Are inserted into the locking holes 5 penetrating in the thickness direction at the same time, and the surfaces of the legs 3 that are separated from each other are pressed against the inner peripheral surface of the locking holes 5 at the tips of the legs 3. The provided locking claw 6 is locked in the locking hole 5 (see, for example, Patent Document 1).
JP 2002-296614 A

  In Patent Document 1, since the flexibility of each leg portion 3 is set to be the same, when vibration or the like is transmitted to the liquid crystal display device after attaching the holder 2 of the liquid crystal display device to the circuit board 4, Each leg 3 is bent evenly, and the liquid crystal display device reciprocally vibrates in the direction along the surface of the circuit board 4 so that the liquid crystal main body 1 for displaying characters, numbers, designs, etc. is in contact with the circuit board 4 and the through holes of the dial. May cause significant displacement.

The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a mounting structure for a liquid crystal display device that can prevent a significant positional shift with respect to a circuit board after mounting. .

1) In order to achieve the above-described object, the present invention provides a holder for supporting a liquid crystal main body, a first leg portion and a second leg portion provided on the holder for mounting a liquid crystal display device on a circuit board. And a locking claw provided at a tip of the first leg and a tip of the second leg, and a locking hole provided in the circuit board and engageable with the locking claw. In the display device mounting structure, the thickness of the first leg is thinner than the thickness of the second leg, and the overall length from the base of the first leg to the locking claw is the second. It is longer than the overall length from the base of the leg to the locking claw, and all the locking claw is equal in height from the surface of the holder on the circuit board side, and the first leg is flexible. It is characterized in that the property is higher than the flexibility of the second leg.

In the liquid crystal display mounting structure configured as described above, the first leg is more flexible than the second leg because the first leg is more flexible than the second leg. In a state where the locking claws of the leg portion and the second leg portion are locked in the locking holes of the circuit board, the liquid crystal display device is always pressed against the second leg portion by the urging force of the first leg portion for positioning. Is done.
As a result, even if vibration or the like is transmitted to the liquid crystal display device, the liquid crystal display device can be prevented from reciprocatingly vibrating in the direction along the surface of the circuit board. can do.

2) Further, the present invention is characterized in that a rib is provided along the longitudinal direction of the second leg portion .

  According to the present invention, even if vibration or the like is transmitted to the liquid crystal display device, the liquid crystal display device can be prevented from reciprocatingly vibrating in the direction along the surface of the circuit board. Can be suppressed.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings. FIG. 1 is an exploded perspective view of an automotive meter unit that employs a liquid crystal display mounting structure according to a first embodiment of the present invention, FIG. 2 is an exploded perspective view of the liquid crystal display device, and FIG. 3 is a circuit diagram of the liquid crystal display device. FIG. 4 is a diagram for explaining a method of mounting on a substrate, FIG. 4 is a diagram showing a state in which a liquid crystal display device is mounted on a circuit board, and FIGS. 5 and 6 are liquid crystal display device mounting structures according to other embodiments of the present invention. It is a figure for demonstrating.

First, an automotive meter unit that employs the liquid crystal display mounting structure according to the first embodiment of the present invention will be described. In FIG. 1, reference numeral 25 denotes a dial having a scale and the like. Are provided with a facing member 29, a rotation pointer 43, and a transparent front cover 40 that is attached to the opening on the front side of the facing member 29.
On the other hand, a case 30, a liquid crystal display device 50, a wiring board assembly 34 including a circuit board 42 and a back cover 35 are provided on the back side of the dial 25.

  The liquid crystal display device 50 includes an LCD 32, a BFE 36, a diffusing plate 33, a prism 37, and a reflecting plate 38, and a liquid crystal main body 51 that displays characters, numbers, designs, etc. is sandwiched between the bezel 31 and the holder 39. It is disposed behind the through hole 26 of the dial 25 and the through hole 41 of the case 30, and the holder 39 is attached to the circuit board 42, so that it is positioned at a predetermined position.

  In the state where the liquid crystal body 51 is sandwiched between the bezel 31 and the holder 39, the bent portions 31a provided on the bezel 31 are engaged with both side surfaces of the liquid crystal body 51 as shown in FIG. The in-plane displacement of the liquid crystal main body 51 can be prevented.

The holder 39 has a substantially rectangular shape, and as shown in FIGS. 2 and 3, two first leg portions 52 are spaced apart on one side of the sides facing each other, and on the other side. The second leg portion 53 is disposed so as to be opposed to the first leg portion 52 at two places. A locking claw 54 is provided at each end of the first leg portion 52 and the second leg portion 53.
On the other hand, the circuit board 42 is provided with a locking hole 55 for locking the locking claws 54 of the first leg portion 52 and the second leg portion 53.

Here, in this embodiment, the thickness of the first leg 52 is made thinner than the thickness of the second leg 53, and referring to FIG. 4, the locking claw 54 extends from the base of the first leg 52. The total length L1 is made longer than the total length L2 from the base of the second leg 53 to the locking claw 54, so that the flexibility of the first leg 52 is more than the flexibility of the second leg 53. Is also high. That is, the first leg portion 52 is more easily bent than the second leg portion 53.
In this embodiment, the second leg 53 has a relatively high rigidity so that it hardly bends.

Then, in order to attach the holder 39 that supports the liquid crystal main body 51 to the circuit board 42, as shown in FIG. 3, for example, the locking claw 54 is inserted into the locking hole 55 corresponding to the locking claw 54 of the second leg portion 53. FIG. 4 shows a state where the first claw 54 is bent and locked in the locking hole 55 corresponding to the locking claw 54 of the first leg 52 after the first leg 52 is locked. As described above, the urging force of the first leg portion 52 causes the surfaces of the leg portions 52 and 53 that are separated from each other to be pressed against the inner peripheral surface of the corresponding locking hole 55, so that the liquid crystal display device 50 is always in the second leg portion. Positioning is performed in a state of being pressed to the 53 side.
3 and 4, reference numeral 56 denotes a seat that abuts against the circuit board 42.

  According to the mounting structure of the liquid crystal display device described above, the first leg 52 is more flexible than the second leg 53 because the first leg 52 is more flexible than the second leg 53. In a state where the locking claws 54 of the one leg portion 52 and the second leg portion 53 are locked in the locking holes 55 of the circuit board 42, the liquid crystal display device 50 is always in the second state by the urging force of the first leg portion 52. It is pressed and positioned on the leg 53 side.

  Thereby, even if vibration or the like is transmitted to the liquid crystal display device 50, it is possible to avoid the liquid crystal display device 50 from reciprocatingly vibrating in the direction along the surface of the circuit board 42, and accordingly, the circuit board 42 of the liquid crystal display device 50. It is possible to suppress a significant positional deviation with respect to

  In addition, the first leg portion that is more flexible than the second leg portion 53 after the second leg portion 53 is locked in the one locking hole 55 without bending each leg portion of the holder at the same time as in the prior art. Since 52 is bent and locked in the other locking hole 55, the mounting operation can be facilitated.

In addition, this invention is not limited to embodiment mentioned above, A suitable deformation | transformation, improvement, etc. are possible.
For example, in the above embodiment, the thickness of the first leg portion 52 is made thinner than the thickness of the second leg portion 53 so that the flexibility of the first leg portion 52 is greater than the flexibility of the second leg portion 53. Although the case where it made high was illustrated, instead of this, as shown in FIG. 5, the thickness of the 1st leg part 52 and the 2nd leg part 53 is made the same, and a latching nail | claw is used from the base part of the 1st leg part 52. 54 by making the overall length L1 up to 54 longer than the overall length L2 from the base of the second leg 53 to the locking claw 54, the flexibility of the first leg 52 is made flexible. Further, as shown in FIG. 6, the first leg 52 and the second leg 53 have the same thickness, and the second leg 53 is formed in the longitudinal direction on the back side. By providing the rib 57 along, the length of the first leg portion 52 is substantially longer than the second leg portion 53, and the flexibility of the first leg portion 52 is greater than the flexibility of the second leg portion 53. high It may be so that.

  Further, in the above-described embodiment, after the locking claw 54 is locked in the locking hole 55 corresponding to the locking claw 54 of the second leg portion 53, it corresponds to the locking claw 54 of the first leg portion 52. Although the locking claw 54 is locked in the locking hole 55 by bending the first leg portion 52, it is not always necessary to do so, and it corresponds to the locking claw 54 of the first leg portion 52. The locking claw 54 is locked in the locking hole 55 to be bent, and then the locking claw 54 is bent in the first leg 52 in the locking hole 55 corresponding to the locking claw 54 of the second leg 53. And may be locked.

  In addition, the materials, shapes, dimensions, and forms of the liquid crystal display device, circuit board, liquid crystal main body, holder, first and second leg portions, locking claws, locking holes, ribs, and the like exemplified in the above-described embodiments The number, the arrangement location, etc. are arbitrary as long as the present invention can be achieved, and are not limited.

1 is an exploded perspective view of an automotive meter unit that employs a liquid crystal display mounting structure according to a first embodiment of the present invention. It is a disassembled perspective view of a liquid crystal display device. It is a figure for demonstrating the method to attach a liquid crystal display device to a circuit board. It is a figure which shows the state which attached the liquid crystal display device to the circuit board. It is a figure for demonstrating the attachment structure of the liquid crystal display device which is 2nd Embodiment concerning this invention. It is a figure for demonstrating the attachment structure of the liquid crystal display device which is 3rd Embodiment concerning this invention. It is a disassembled perspective view for demonstrating an example of the attachment structure of the conventional liquid crystal display device.

Explanation of symbols

39 Holder 42 Circuit board 50 Liquid crystal display device 51 Liquid crystal body 52 First leg 53 Second leg 54 Locking claw 55 Locking hole 57 Rib

Claims (2)

In order to attach the liquid crystal display device to the circuit board,
A holder for supporting the liquid crystal body, a first leg and a second leg provided on the holder, a locking claw provided on each of the tip of the first leg and the tip of the second leg, An attachment structure of a liquid crystal display device provided with a locking hole provided on the circuit board and engageable with each locking claw,
The thickness of the first leg is thinner than the thickness of the second leg,
The total length from the base of the first leg to the locking claw is longer than the total length from the base of the second leg to the locking claw,
All the locking claws have the same height from the circuit board side surface of the holder,
A mounting structure for a liquid crystal display device, wherein the flexibility of the first leg is higher than the flexibility of the second leg.   The mounting structure for a liquid crystal display device according to claim 1, wherein a rib is provided along a longitudinal direction of the second leg portion.

Images