JP4447692B2 - Display mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mounting structure for a display device in which terminal pins of an LCD panel or the like are inserted into terminal holes of a printed wiring board and soldered.
[0002]
[Prior art]
In this type of display, a plurality of terminal pins are provided on opposite sides, and the operation of inserting the plurality of terminal pins into the terminal holes of the printed wiring board at once is extremely complicated and requires skill. It was a thing. Therefore, a guide hole for guiding these terminal pins to the terminal holes is provided in a lamp case or the like to which the display is attached.
[0003]
6 to 9 show a conventional display mounting structure. FIG. 6 (a) is a rear view of the lamp case, FIG. 6 (b) is a plan view, and FIG. 6 (c) is a side view of the LCD display. (D) is a sectional view taken along line VI (d) -VI (d) in FIG.
[0004]
7 is a side view showing a state in which the LCD display is assembled, FIG. 8A is an enlarged view of the VIII (a) portion in FIG. 7, and FIG. 7B is a VIII (b) portion in FIG. FIG. 9 is an enlarged view and FIG. 9 is a side sectional view showing a state in which the LCD display is incorporated. A conventional display mounting structure will be described with reference to these drawings.
[0005]
6 (a) and 6 (b), reference numeral 2 denotes a lamp case as a guide member, which includes a pair of main bodies 3 and 3 formed in a quadrangular pyramid shape. Mounting holes 3a and 3a for mounting the lamp are provided at the bottom of the main bodies 3 and 3. Two pairs of elastic engagement pieces 19 facing each other are provided at the upper end edges of the main bodies 3 and 3, and four pairs of support pieces 20 extending in the vertical direction are provided on the side portions of the main bodies 3 and 3. ing.
[0006]
Four protrusions 21 for attaching the printed wiring board 12 are integrally formed at the lower ends of the support pieces 20 located at both ends of the four pairs of support pieces 20. In addition, a pair of guide portions 22A and 22B formed in an elongated rectangular parallelepiped are integrally formed at the lower part of the four pairs of support pieces 20, and a large number of quadrangular pyramids are formed in these guide portions 22A and 22B. Guide holes 22a are provided in a row.
[0007]
In FIG. 2C, reference numeral 10 denotes an LCD panel, in which terminal pin groups 11A and 11B made up of a large number of terminal pins on a pair of opposite side portions are orthogonal to the LCD panel 10 so as to be orthogonal to the LCD panel 10. , 11B are provided in parallel to each other.
[0008]
The interval B between these opposing terminal pin groups 11A and 11B is formed to be the same as the interval B3 between the guide holes 22a and 22a of the opposing guide members 22A and 22B described above in FIG.
[0009]
The printed wiring board 12 attached to the protrusion 21 of the main body 3 is provided with a lamp hole 12a corresponding to the attachment hole 3a of the main body 3, and a terminal hole 12b corresponding to the guide hole 22a.
[0010]
In such a configuration, when the terminal pin groups 11A and 11B of the LCD panel 10 are mounted on the printed wiring board 12, the LCD panel 10 is moved rightward in the drawing as shown in FIG. 11A and 11B are engaged with the guide holes 22a and 22a of the guide portions 22A and 22B.
[0011]
When the terminal pin groups 11A and 11B are guided by the guide holes 22a and 22a and the LCD panel 10 is further moved to the right in the figure, the terminal pin groups 11A and 11B are connected to the printed wiring board 12 as shown in FIG. The LCD panel 10 is attached to the opening of the main body 3 through the elastic engagement piece 19.
[0012]
[Problems to be solved by the invention]
However, in the conventional display mounting structure described above, the opposing terminal pin groups 11A and 11B are parallel to each other, and the interval B is the same as the interval B3 between the guide holes 22a and 22a of the pair of guide portions 22A and 22B. Is formed.
[0013]
For this reason, as shown in FIG. 8, when the terminal pin groups 11A and 11B are engaged with the guide holes 22a and 22a, when one terminal pin group 11A is removed from the guide hole 22a of the guide member 22A, The other terminal pin group 11B is also disengaged from the guide hole 22a of the guide member 22B, and the terminals 11A and 11B cannot be engaged with the guide holes 22a and 22a.
[0014]
Therefore, it is necessary to position both terminal pin groups 11A and 11B composed of a large number of terminal pins at the same time in all the guide holes 22a and 22a of both guide members 22A and 22B, and engage them at the same time. There was a problem that it took extra time.
[0015]
Further, when the LCD panel 10 is tilted clockwise or counterclockwise in FIG. 7 when engaging the terminal pin groups 11A and 11B into the guide holes 22a and 22a, either one of the terminal pin groups 11A and 11B is There was also a problem that the terminal pin group could be bent because it could not be inserted into the guide hole 22a.
[0016]
The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a display mounting structure that improves workability and prevents the occurrence of defective products.
[0017]
[Means for Solving the Problems]
In order to achieve this object, the invention according to claim 1 is provided with an indicator having a plurality of terminal pins projecting from a pair of opposing side portions, and a guide hole for guiding the terminal pin of the indicator. In the mounting structure of a display device comprising: a guide member, and a printed wiring board provided with a terminal hole into which a tip of a terminal pin of the display device protruding from the guide hole of the guide member is inserted. And a pair of guide walls for guiding the terminal pin of the indicator to the guide hole is provided in the guide member, and the pair of the guide pins is provided with a pair of guide walls. The distance between the ends of the guide wall opposite to the side where the guide holes are provided is smaller than the distance between the tips of the opposing terminal pins , and the ends on the side where the guide holes are provided The opposite distance between each other It is made larger than the spacing between the ends of the terminal pins that.
Therefore, when the terminal pin is guided to the pair of guide walls, the tip of the terminal pin is guided without contacting the end portion of the guide wall. Further, before the terminal pin is inserted into the guide hole, the terminal pin contacts the pair of guide walls.
[0018]
According to a second aspect of the present invention, in the first aspect of the present invention, the total lengths of the terminal pins facing each other of the display device are different from each other.
Therefore, the longer terminal pin comes into contact with the guide wall first, and is inserted into the guide hole first.
The invention according to claim 3 is the invention according to claim 1 or 2, wherein a bent portion is provided on the base end side of the terminal pin.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1A and 1B show a lamp case employed in a display mounting structure according to the present invention, in which FIG. 1A is a plan view and FIG. 1B is a front view.
[0020]
2 (a) is a side view of the display, FIG. 2 (b) is a sectional view taken along line II (b) -II (b) in FIG. 1 (a), and FIG. 2 (c) is in FIG. 1 (a). The enlarged view of II (c) part, the figure (d) is the enlarged view of the II (d) part in the figure (b), the figure (e) is the enlarged view of the II (e) part in the figure (b). It is.
[0021]
3 is a side view showing a state in which the LCD display according to the present invention is assembled, FIG. 4A is an enlarged view of the IV (a) portion in FIG. 3, and FIG. FIG. 5 is a side sectional view showing a state in which the LCD display is incorporated.
[0022]
In FIG. 1, the lamp case denoted by reference numeral 2 is provided with a quadrangular pyramid-shaped main body 3 having a mounting hole 3 a, and a front plate 4 </ b> A and a back plate 4 </ b> B are provided before and after the main body 3. A protrusion 5 for attaching the printed wiring board 12 is provided at the lower ends of the front plate 4A and the back plate 4B. Reference numeral 6 denotes attachment pieces provided on the left and right sides of the lamp case 2 for attaching the lamp case 2 to the apparatus main body.
[0023]
The front plate 4A and the back plate 4B are provided with a pair of guide walls 8A and 8B, respectively, and these guide walls 8A and 8B are arranged from the top to the bottom as shown in FIG. It is formed so that the distance between each other increases. That is, the guide walls 8A and 8B are formed so as to be inclined so that the interval B2 between the lower end portions is larger than the interval B1 between the upper end portions.
[0024]
On the outer surfaces of these guide walls 8A and 8B, a plurality of guide grooves 8b that are partitioned in the left-right direction by a partition wall 8a having a small height and extend in the up-down direction are provided. The guide groove 8b is formed so as to correspond to the terminal pin groups 11A and 11B of the LCD display 10 described above.
[0025]
Guide portions 9A and 9B are provided at the lower ends of the guide walls 8A and 8B, and the guide portions 9A and 9B are provided with a number of quadrangular pyramid-shaped guide holes 9a corresponding to the guide grooves 8b. The height H1 of one guide portion 9A is lower than the height H2 of the other guide portion 9B.
[0026]
As shown in FIG. 2A, the total length L1 of the terminal pin group 11A of the LCD display 10 is formed shorter than the total length L2 of the terminal pin group 11B, and between the tip portions of the terminal pin groups 11A and 11B. The interval b1 is formed slightly smaller than the interval b2 between the base end portions.
[0027]
Further, with respect to the distance b1 between the tip portions of the terminal pin groups 11A and 11B, the above-described distance B1 between the upper portions of the guide walls 8A and 8B is formed smaller and the lower distance B2 is formed larger. Bent portions 11a and 11a are provided on the base end side of both terminal pin groups 11A and 11B, respectively.
[0028]
Next, a method of mounting the terminal pin group in the display mounting structure having such a configuration will be described.
As shown in FIG. 3, the terminal pin groups 11A and 11B of the LCD display 10 are moved in parallel to the right side in the drawing, that is, to the lamp case 2 side so as to correspond to the guide walls 8A and 8B of the lamp case 2.
[0029]
Here, the interval b1 between the tip portions of the terminal pin groups 11A and 11B is formed larger than the interval B1 between the upper portions of the guide walls 8A and 8B. For this reason, even if the terminal pin groups 11A and 11B are slightly rotated and tilted clockwise or counterclockwise in the figure, the tips of the terminal pin groups 11A and 11B are not brought into contact with the upper ends of the guide walls 8A and 8B. To the guide walls 8A, 8B. Therefore, the terminal pin groups 11A and 11B are not bent.
[0030]
At this time, since one terminal pin group 11B is formed longer than the other terminal pin group 11A, as shown in FIG. 4B, the terminal pin group 11A having a short total length is used as a guide for the guide wall 8A. Before coming into contact with the groove 8b, the tip of the terminal pin group 11B having a long full length comes into contact with the guide groove 8b of the guide wall 8B as shown in FIG.
[0031]
Therefore, when only one terminal 11B in contact with the guide groove 8b is made to correspond to each guide groove 8b of the guide wall 8B, the guide groove 8b is partitioned by the partition wall 8a and the cross section is formed in an arc shape. Therefore, the one terminal group 11B is regulated by the partition wall 8a in the left-right direction, and slides along the central portion of the guide groove 8b without detaching from each guide groove 8b.
[0032]
Further, when the LCD display 10 is moved to the lamp case 2 side, the tip of the terminal pin group 11A having a short overall length comes into contact with the guide groove 8b of the guide wall 8A. At this time, since one terminal pin group 11B is already positioned by the guide groove 8b of the guide wall 8B, the terminal pin group 11B having a short overall length is automatically positioned in the predetermined guide groove 8b of the guide wall 8A. .
[0033]
Thus, since it is not necessary to position both terminal pin groups 11A and 11B in the guide grooves 8b and 8b of both guide walls 8A and 8B at the same time, the positioning operation is facilitated.
[0034]
Moreover, since the gap B2 below the guide walls 8A and 8B is formed larger than the gap b1 between the tip portions of the terminal pin groups 11A and 11B, the LCD display 10 is moved to the lamp case 2 side. The tip ends of the terminal pin groups 11A and 11B slide while being held in contact with the guide groove 8b.
[0035]
Further, since the interval b1 between the tip portions of the terminal pin groups 11A and 11B is formed smaller than the interval B2 between the lower end portions of the guide walls 8A and 8B, the terminal pin group in contact with the inclined guide grooves 8b and 8b. 11A and 11B are elastically deformed so as to open each other. Therefore, the tips of the terminal pin groups 11A and 11B come into firm contact with the guide grooves 8b and 8b by the elastic restoring force generated by this elastic deformation.
[0036]
Therefore, since the terminal pin groups 11A and 11B once positioned in the predetermined guide groove 8b are reliably guided to the predetermined guide holes 9a and 9a of the guide portions 9A and 9B by the guide grooves 8b and 8b, the operation is repeated. This eliminates the need for work time.
[0037]
In addition, since the height of one guide portion 9B is higher than the height of the other guide portion 9A, one terminal pin group 11B is engaged with a predetermined guide hole 9a of one guide portion 9B. Then, the other terminal pin group 11A can be engaged with the predetermined guide hole 9a of the other guide portion 9A. Therefore, the burden on the operator is reduced as compared with the conventional method in which the terminal pin groups facing each other are simultaneously engaged in the guide hole.
[0038]
Further, since the guide grooves 8b of the guide walls 8A and 8B are formed in an arc shape in cross section, the partition wall 8a is formed in the shape of a line having almost no dimension in the width direction, so that the width of the guide groove 8b is reduced. Formed to the maximum. For this reason, the operation of positioning the terminal pin groups 11A and 11B in the guide groove 8b can be performed easily and in a short time.
[0039]
The tip portions of both terminal pin groups 11A and 11B guided by the guide holes 9a and 9a of both guide portions 9A and 9B and inserted into the terminal holes 12b and 12b of the printed wiring board 12 are soldered to the printed wiring board 12. Implemented.
[0040]
At this time, warpage of the printed wiring board 12 due to a temperature change after soldering or the like occurs, and stress is applied to the terminal pin groups 11A and 11B, but since the stress is relieved by the bent portion 11a, these terminal pins It is possible to prevent peeling or cracking from occurring at the joint between the groups 11A and 11B and the LCD panel 10.
[0041]
【The invention's effect】
As described above, according to the first aspect of the invention, the terminal pin group is not bent. In addition, since the terminal pin group once positioned in the predetermined guide groove is reliably guided to the predetermined guide hole by the guide groove, it is not necessary to redo the work and the work time is shortened.
[0042]
According to the second aspect of the present invention, the positioning of the terminal pin group into the guide groove and the positioning of the terminal pin group into the guide hole are performed on both the one terminal pin group and the other terminal pin group. Since it is not necessary to carry out at the same time, the burden on the operator is reduced.
[Brief description of the drawings]
FIG. 1 shows a lamp case employed in a display mounting structure according to the present invention, where FIG. 1 (a) is a plan view and FIG. 1 (b) is a front view.
2A is a side view of a display employed in the display mounting structure according to the present invention, and FIG. 2B is a line II (b) -II (b) in FIG. 1A. FIG. 2C is an enlarged view of the II (c) portion in FIG. 1A, FIG. 4D is an enlarged view of the II (d) portion in FIG. 1B, and FIG. These are the enlarged views of the II (e) part in the figure (b).
FIG. 3 is a side view showing a state in which the LCD display according to the present invention is assembled.
4A is an enlarged view of the IV (a) portion in FIG. 3, and FIG. 4B is an enlarged view of the IV (b) portion in FIG.
FIG. 5 is a side sectional view showing a state in which the LCD display according to the present invention is incorporated.
6A is a side view of a lamp case in a conventional display mounting structure, FIG. 6B is a plan view, FIG. 6C is a side view of an LCD display, and FIG. d) is a sectional view taken along line VI (d) -VI (d) in FIG.
FIG. 7 is a side view showing a state in the middle of assembling a conventional LCD display.
8A is an enlarged view of a VIII (a) portion in FIG. 7, and FIG. 8B is an enlarged view of a VIII (b) portion in FIG.
FIG. 9 is a side sectional view showing a state in which a conventional LCD display is incorporated.
[Explanation of symbols]
2 ... Lamp case, 8A, 8B ... Guide wall, 8a ... Partition wall, 8b ... Guide groove, 9A, 9B ... Guide part, 9a ... Guide hole, 10 ... LCD display, 11A, 11B ... Terminal pin group.

Claims (3)

A display device having a plurality of terminal pins projecting from a pair of opposite side portions, a guide member provided with a guide hole for guiding the terminal pins of the display device, and the above-mentioned protrusion projecting from the guide hole of the guide member In a display mounting structure including a printed wiring board provided with a terminal hole into which a tip of a terminal pin of the display is inserted , the interval between the tip portions of the terminal pins is set between the base end portions of the terminal pins. The guide member is formed with a pair of guide walls that guide the terminal pins of the indicator to the guide holes, and ends of the pair of guide walls opposite to the side where the guide holes are provided. The distance between the parts is smaller than the distance between the tip parts of the opposing terminal pins , and the distance between the end parts on the side where the guide holes are provided is between the tip parts of the opposing terminal pins. Formed larger than the interval Mounting structure of the display device, wherein the door.   2. The display mounting structure according to claim 1, wherein the terminal pins facing each other of the display have different lengths. 3. The display mounting structure according to claim 1, wherein a bent portion is provided on a base end side of the terminal pin.

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