JP2002196691A - Sealing cover for display body and method for making the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve flatness of a sealing cove for a display body and to easily and accurately position the cover when attaching it. SOLUTION: This sealing cover 1 for the display body is made of sheer metal and is provided with a convex cross-section shaped cover section 3 and a flange section 5 surrounding the peripheral of the cover section 3 and fixed to a based plate. A flatness correction section 9, 11 for correcting the flatness of the cover section 3 or the flange section 5 by collaping in the direction of board thickness is fixed around at least one of the cover section 3 or the flange section 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a sealing cover for sealing a display body supported on a substrate and a method of manufacturing the same.

[0002]

2. Description of the Related Art As a conventional display body sealing cover, there is one disclosed in Japanese Patent No. 2800813, for example. The display body sealing cover described therein seals the display body fixed to the substrate. The display body sealing cover is formed by shaving glass, and is fixed to the substrate via an adhesive.

It has been proposed to improve productivity and reduce costs by using a thin metal display cover 101 as shown in FIG. 15 for such a display sealing cover formed by shaving glass. . The display body sealing cover 101 is for sealingly covering the display body 107 fixed on the glass substrate 103 via an adhesive.

The display body sealing cover 101 is formed, for example, by press-forming a stainless steel thin plate.
The display body sealing cover 101 has a cover section 10 having a convex cross-sectional shape.
9 and a flange 111 on the periphery of the cover 109. The flange portion 111 is attached to the substrate 10 with an adhesive.
It is fixed on the three sides. A desiccant storage unit 113 is provided at the center of the cover unit 109. The desiccant storage section 113 is filled with silica gel 115 or the like as a desiccant. The interior space 117 of the cover 109 is filled with an inert gas. Therefore, the display body 107
Can be protected from moisture and the like.

FIG. 16 shows the display body sealing cover 101 when viewed from the plane. FIG. 16 is a plan view of the display body sealing cover as viewed from the inside. As shown in FIG. 16, the flange portion 111 is provided along the entire circumference of the cover portion 109.

FIG. 17 shows a cross section of the periphery of the display body sealing cover 101. FIG.
3 is a cross-sectional view of a main part taken along line SA-SA of FIG. As shown in FIG. 17, the display body sealing cover 101 is formed to have a thickness t.
The height of the cover 109 is H. The height H of the cover portion 109 is variously selected depending on the device.

The display body sealing cover 101 is obtained by press molding as shown in FIG. In FIG. 18, the pressing of the display body sealing cover 101 is performed by the punch 119 and the die 1.
21 and the counter punch 123.
A plate retainer 125 is provided on the punch 119 side.

Accordingly, for a stainless steel sheet,
By lowering the punch 119 and the plate holder 125, first, the periphery of the thin metal plate is pressed by the plate holder 125 and the die 121. Subsequently, when the punch 119 further descends, the counter punch 123 retreats against the spring, and the display body sealing cover 101 can be press-formed as shown in FIG.

[0009]

However, as described above, when a thin metal plate is simply press-formed, a tensile force remains in the plane of the cover 109 or the like in FIG. 16 due to elongation of the material. For this reason, an unbalance of residual stress is caused on one surface and the other surface of the display body sealing cover 101,
The entire display sealing cover 101 is warped as shown in FIG. 19, for example. In particular, when the display body sealing cover 101 is rectangular in a plan view, the unbalance of the residual stress tends to be large, and a large warp occurs, and the sealing property to the substrate 103 as a mating component may be insufficient. was there.

[0010] In addition, as shown in Fig. 17, the display body sealing cover 101 may have an aperture depth H that is 2.5 times or more the thickness t of the thin plate. For this reason, as shown in FIG. 18, a large radius is provided on the punch 119 and a radius r is also provided on the die 121 so as to prevent the thin plate from being broken by deep drawing during press forming. For this reason, a vertical surface for positioning at the time of assembling cannot be secured, and assembling may be inaccurate. That is, in assembling, as shown in FIG. 20, the display body sealing cover 101 is positioned on the jig 127, and the substrate 103 positioned by another jig is fixed thereon from above. However, the display body sealing cover 101 has r, and the presence of R hardly forms a vertical surface on the outer periphery of the iris, and the positioning by the jig 127 is not determined as shown in FIG.
1 and the substrate 103 may be inaccurate as described above.

Further, as shown in FIG.
When the terminal is to be positioned by another jig 129, the display body sealing cover 101 is warped as described above, so that the terminal cannot be positioned by the jig 129, and the accurate Mounting may be difficult.

A first object of the present invention is to improve the flatness, and a second object is to facilitate the positioning at the time of assembly.

[0013]

According to the present invention, there is provided a sealed cover made of a thin metal plate, comprising a cover having a convex cross section and a flange fixed to a substrate at a periphery of the cover. A flat correction portion for correcting flatness of the cover portion or the flange portion by crushing in a thickness direction is provided in at least one of the cover portion and the flange portion in a circular shape.

According to a second aspect of the present invention, there is provided the display body sealing cover according to the first aspect, wherein the flattening portion is provided along a base portion of the flange portion on the cover portion side. .

According to a third aspect of the present invention, in the display body sealing cover according to the first or second aspect, the flattening portion is provided along a side edge of the flange portion of the cover portion. And

According to a fourth aspect of the present invention, there is provided the display body sealing cover according to any one of the first to third aspects, wherein the flattening portions are provided continuously or at predetermined intervals. And

According to a fifth aspect of the present invention, there is provided a cover having a convex cross-sectional shape and a flange fixed to a substrate at a periphery of the cover, and at least one of the cover and the flange is provided with:
A method of manufacturing a thin metal display body sealing cover provided with a flattening portion for correcting the flatness of the cover portion or the flange portion by crushing in a plate thickness direction, the flattening portion being provided with the display portion. It is characterized in that the body sealing cover is crushed and formed simultaneously with the press forming.

According to a sixth aspect of the present invention, there is provided a method of manufacturing a display body sealing cover according to the fifth aspect, wherein the pressing of the display body sealing cover is performed using a punch, a die and a counter punch, and the punch or the punch is formed. The crushing projection is provided on at least one of the counter punches, and the crushing is performed by the projection simultaneously with the press molding of the display body sealing cover.

[0019]

According to the first aspect of the present invention, there is provided a seal cover made of a thin metal plate, comprising a cover having a convex cross-sectional shape and a flange fixed to a substrate at a periphery of the cover. Since at least one of the flange portions is provided with a flattening portion for correcting the flatness of the cover portion or the flange portion by crushing in the thickness direction in a circular shape, the flatness of at least one of the cover portion or the flange portion is corrected. Can be. Therefore, the flatness of the display body sealing cover can be improved, and the display body sealing cover can be adhered to the mating substrate or the like with high adhesion, so that the display body housed in the cover portion can be reliably formed. Can be protected. Also, since the flatness of the display body sealing cover is improved, when the display body sealing cover is fixed while being positioned on the mating substrate or the like, the end of the flange portion can be accurately positioned with a jig, and can be assembled. Can be performed with high accuracy.

According to the second aspect of the invention, in addition to the effect of the first aspect, the flatness correcting portion is provided along the cover-side base of the flange portion, so that the flatness of the flange portion is corrected. can do. Therefore, the flatness of the display body sealing cover can be reliably improved, and the display body sealing cover can be firmly fixed to a substrate or the like. Further, the surface for aligning the jig is easily formed by the presence of the flattening portion, and the jig can be accurately attached to the substrate or the like by accurately applying the jig to the alignment surface during assembly.

According to the third aspect of the present invention, in addition to the effects of the first or second aspect, the flatness correcting portion is provided along the flange side edge of the cover portion, so that the flatness of the cover portion is improved. Alternatively, the flatness of both the cover portion and the flange portion can be corrected. Therefore, the flatness of the display body sealing cover can be reliably improved, and a highly sealed fixing and accurate mounting can be reliably performed.

According to the fourth aspect of the present invention, in addition to the effects of any one of the first to third aspects of the present invention, since the flattening portions are provided continuously or circumferentially at predetermined intervals, the flatness correcting portion is formed of a cover portion or a flange portion. At least one flatness can be reliably corrected. Therefore, the flatness of the display body sealing cover can be reliably improved, and the highly sealed and accurate fixing can be reliably performed.

According to a fifth aspect of the present invention, there is provided a cover having a convex cross-sectional shape and a flange fixed to the substrate at the periphery of the cover, and at least one of the cover and the flange is crushed in a thickness direction by the crushing. A method for manufacturing a display body sealing cover made of a thin metal plate provided with a flattening section for correcting flatness of a cover section or a flange section in a circular shape, wherein the flattening section is simultaneously formed with press forming of the display body sealing cover. It can be crushed and formed. Therefore, a special process for providing the flattening portion is not required, and the device can be easily manufactured.

According to a sixth aspect of the present invention, in addition to the effect of the fifth aspect of the present invention, the display body sealing cover is press-formed by using a punch, a die and a counter punch, and at least one of the punch and the counter punch is formed. The convex portion for crushing is provided, and the crushing can be performed by the convex portion at the same time as the press molding of the display body sealing cover. Therefore, only by changing the shape of at least one of the punch and the counter punch, the flattened portion can be reliably formed at the same time as the press-forming of the display body sealing cover, and the manufacture can be performed extremely easily.

[0025]

FIG. 1 is a perspective view of a display body sealing cover 1 according to an embodiment of the present invention. The display body sealing cover 1 of FIG. 1 is fixed to the substrate similarly to the case of FIG. 15, and seals the display body. That is, the display body sealing cover 1 is configured as, for example, each display of a mobile phone, a car navigation, a pocket game machine, and the like.

The display body sealing cover 1 is made of a thin metal plate, for example, a thin stainless steel plate, and is formed by press molding as shown in FIG. The display body sealing cover 1 is formed in a rectangular shape as seen from a plane similarly to the above. However, the shape of the display body sealing cover 1 can be arbitrarily formed such as a circle, a triangle, a pentagon, and other polygons when viewed from a plane.

The display body sealing cover 1 is provided with a cover portion 3 having a convex cross section similarly to the above and a flange portion 5 fixed to the substrate at the periphery of the cover portion 3. Flange part 5
Is provided over the entire periphery of the cover 3. A desiccant storage section 7 is protruded from the cover section 3. The desiccant storage section 7 can be omitted.

On the other hand, in this embodiment, the cover 3
The flattening portions 9 and 11 are provided in both the flange portion 5 and the flat portion. In FIG. 1, the flatness correcting portions 9 and 11 are shown in black, but are shown for convenience in order to clarify the existence of the flatness correcting portions 9 and 11. The flattening portions 9 and 11 may be provided on at least one of the cover portion 3 and the flange portion 5 depending on the warp correction request state of the display body closed cover 1, and either one of them may be omitted. . The omission of the flattening portion 9 on the side of the cover 3 can be performed when the flatness of the cover 3 is relatively high even after press forming in relation to the drawing depth of the press. Similarly, the omission of the flattening portion 11 on the flange portion 5 side can be similarly performed when the flatness of the flange portion 5 is high. However, regardless of such a reason, the flattening portion 9 of the cover portion 3 or the flattening portion 1 of the flange portion 5 may be used.
By providing only one of them, the flatness of either one can be improved, and as a whole, the flatness of the display sealing cover 1 can be improved.

FIG. 2 shows the arrangement of the flattening section 9 and FIG. 3 shows the arrangement of the flattening section 11. Figure 2
FIG. 3 is a plan view of the display body sealing cover 1. 2 and 3, the flattening sections 9 and 11 are separately shown, but this is for convenience of explanation. In the present embodiment, both the flattening sections 9 and 11 are provided as shown in FIG. Have been.

As shown in FIG. 1 and FIG.
Are provided continuously and circumferentially along the edge of the cover portion 3 on the side of the flange portion 5. As shown in FIGS. 1 and 3, the flattening portion 11 is provided continuously in a circular shape along the base of the flange portion 5 on the cover portion 3 side.

The cross-sectional structure of the flattening portions 9 and 11 is shown in FIG.
It is like. FIG. 4 is an enlarged sectional view of an essential part taken along line SB-SB in FIG. As is clear from FIG.
The flatness correcting portions 9 and 11 are formed by crushing the thickness t of the general portion of the display body sealing cover 1 to t1 in the thickness direction. Therefore, in the portions of the flattening sections 9 and 11,
As the plate thickness changes from t to t1, the material is hardened.

The flattening portion 9 is provided along the side edge of the flange portion 5 of the cover 3 as described above, and the vertical wall 13 is provided by the presence of the flattening portion 9. The flatness correcting portion 11 is provided along the base of the flange portion 5 on the cover portion 3 side as described above, and the vertical wall 15 is provided by the presence of the flatness correcting portion 11.

Also in this embodiment, the drawing depth H of the drawing portion 17 is 2.5 times or more the plate thickness t. Therefore, the squeezing section 1 is set by setting the mold.
R and r are set inside and outside 7 so that cracks do not occur during press forming. As described above, even if R and r exist inside and outside the narrowed portion 17, since the flattening portion 11 is provided, the positioning surface 19 for jig positioning is reliably secured on the outer peripheral side of the narrowed portion 17. be able to. The positioning surface 9 has a high perpendicularity to the flange portion 5.

Due to the presence of the flatness correcting portions 9 and 11,
In this embodiment, the flatness of both the cover portion 3 and the flange portion 5 is corrected, and the flatness of the entire display body sealing cover 1 can be greatly improved.

That is, as shown in FIG. 4, the cover 3 and the flange 5
Of the flattening portions 9 and 11 in the thickness direction is reduced. Therefore, the unbalance of the residual stress between one surface and the other surface of the display body sealing cover 1 is reduced, and as a result, the flatness of the cover portion 3 and the flange portion 5 is corrected.

The flattening sections 9 and 11 have vertical walls 13 and
15 is provided, and the load in the direction in which the cover 3 and the flange 5 warp can be received as in-plane forces of the vertical walls 13 and 15. Therefore, by providing the flatness correcting portions 9 and 11, the function of a rib can be provided in terms of shape, and from this point, the flatness of the cover portion 3 and the flange portion 5 is corrected, and the display body sealing cover 1 is formed. The overall flatness can be greatly improved.

The production of the display body sealing cover 1 is performed as shown in FIG. As shown in FIG. 5, the flattening portions 9 and 11 are crushed and formed simultaneously with the press forming of the display body sealing cover 1. Press forming of the display body sealing cover 1 is performed using a punch 21, a die 23, and a counter punch 25. The plate holder 27 is configured to move up and down on the punch 21 side. Counter punch 25
The plate holder 27 is urged by a spring.
The counter punch 25 is urged upward in the state of FIG.
The plate holder 27 is urged downward.

On the other hand, in the present embodiment, the convex portion 2 for forming the flatness correcting portion 9 on the counter punch 25 is used.
Numerals 9 are provided continuously corresponding to the flattening portions 9.
The die 23 has a projection 3 corresponding to the flattening portion 11.
1 are provided continuously. Further, the punch 21 and the die 23 are provided with R and r for coping with deep drawing.

Therefore, simultaneously with the press molding of the display body sealing cover 1, the projection 29 of the counter punch 25 and the die 2
3 is formed by crushing with the convex portion 31, and the flattening portion 9,
11 can be formed respectively. Therefore, it is possible to easily manufacture the display body sealing cover 1 without requiring a special process for forming the flattening portions 9 and 11. However, the flattening portions 9 and 11 may be formed in a separate process after the entire shape is formed by press forming.

FIG. 6 shows a process sequence of the display body sealing cover 1.
To FIG. FIG. 6 shows a blanking process, and FIG.
8 shows a first drawing step, FIG. 8 shows a second drawing step, and FIG. 9 shows a trimming step.

In the blanking step shown in FIG. 6, the work 33 is punched out to form one display body sealing cover as shown in the plan view of FIG. 6A and the side view of FIG.

In the first drawing step of FIG. 7, the desiccant storage section 7 is formed in the work 33 as shown in the plan view of FIG. (B) is a schematic diagram showing a press-formed state. In the first drawing step, the work 33 is press-formed by the punch 35, the die 37, the counter punch 39, and the plate holder 41 to form the desiccant storage section 7.

In the second drawing step of FIG. 8, the cover 33 is further formed on the work 33 as shown in the plan view of FIG. (B) is a schematic view of a press-formed state in the second drawing step. As shown in (b), in the second drawing step, the punch 21 and the die 2 corresponding to the formation of the cover 3 are formed.
3, a counter punch 25 and a plate holder 27 are used. As a result, the cover 3 is formed as shown in FIG. In the second drawing step, the flattening portions 9 and 11 are formed simultaneously with the press forming as shown in FIG.

In the trimming step shown in FIG. 9, the periphery is cut off as shown in FIG. 9A, and the display body sealing cover 1 is completed. (B) shows a schematic view of the trimming step. As shown in (b), in the trimming process, a punch 43, a die 45, a counter punch 47, and a plate holder 49 having a size corresponding to the trimming are used. Thus, the display body sealing cover 1 as shown in FIG.

The completed display body sealing cover 1 is assembled as shown in FIG. That is, due to the presence of the flattening portion 11, it is possible to reliably secure the alignment surface 19 at a right angle to the flange portion 5 on the outer peripheral side of the drawing portion 17. Therefore, the display body sealing cover 1 can be easily and accurately positioned by simultaneously abutting the jig 51 against the flange portion 5 and the positioning surface 19. With respect to the correctly positioned display body sealing cover 1, the substrate 53 accurately positioned by another jig is used.
Are stacked, and both can be accurately fixed. Therefore,
The mounting accuracy of the display body sealing cover 1 to the substrate 53 can be greatly improved.

FIGS. 11 and 12 are plan views of a display body sealing cover 1A according to another embodiment. FIG. 11 shows only the state of the flattening section 9A of the present embodiment, and corresponds to FIG. FIG. 12 shows a state of the flattening section 11A of the present embodiment, and corresponds to FIG. These FIGS. 11 and 1
As shown in FIG. 2, in the display body sealing cover 1A, the flattening portions 9A and 11A are provided in a circular shape at predetermined intervals.

Even in the case where the flattening portions 9A and 11A are provided at predetermined intervals instead of being continuous, the tensile force at the time of press forming can be canceled in substantially the same manner as described with reference to FIG. Further, the rib function can be exhibited in shape, and the flatness of the display body sealing cover 1A can be greatly improved.

When the flattening portions 11A are provided on the flange portion 5 at predetermined intervals as shown in FIG. 12, it may be difficult to perform positioning by the jig 51 as shown in FIG. Even in this case, since the flatness of the display body sealing cover 1A is greatly improved, the positioning is reliably performed by using the jig 129 shown in FIG. Easy installation is possible.

The flattening portions 9A, 1 shown in FIGS.
The size and number of 1A intervals can be set freely,
With this setting, the correction of the flatness of the cover 3 and the flange 5 can be arbitrarily adjusted, and the degree of freedom in setting the flatness of the display sealing cover 1A can be increased.

FIG. 13 is a plan view showing a display body sealing cover 1B according to still another embodiment of the present invention.
In the present embodiment, the flattening portions 9B1 and 9B2 are doubly and continuously provided so as to surround the desiccant storage portion 7 only in the cover portion 3.

In the present embodiment, the flatness of the cover portion 3 can be greatly improved by the two flatness correcting portions 9B1 and 9B2. The position and number of the flattening portions 9B1 and 9B2 provided on the cover portion 3 are not particularly limited, and it is possible to form only one or set three or more.

FIG. 14 shows a press-formed state in the case where the flat surface correcting portion 11 is provided only on the flange portion 5 on the display body sealing cover 1C. As shown in FIG. 14, in the present embodiment, the protrusion 31 is provided only on the die 23, and the protrusion is not provided on the counter punch 25C. Thereby, the flatness correcting portion 11 can be provided only on the flange portion 5 by press molding. The depth and width of the flatness correcting portion in each of the above embodiments can be arbitrarily set in order to secure the flatness of the display body sealing cover. Can be set. In addition, the width and depth of the flattening portion are not limited to those uniform over the entire circumference, but may be partially deep or shallow according to the flatness correction state, and further partially widened or narrowed. Can also be set. Further, the surface on the far side in the depth direction of the flatness correcting portion can be set to be inclined in the width direction or the circumferential direction according to the flatness correction status.

[Brief description of the drawings]

FIG. 1 is a perspective view of a display body sealing cover according to an embodiment of the present invention.

FIG. 2 is a plan view of the display body sealing cover mainly showing a flattening portion of the cover portion according to the embodiment.

FIG. 3 is a plan view of a display body sealing cover mainly showing a flattening portion of a flange portion according to the embodiment.

FIG. 4 is an enlarged cross-sectional view of a main part taken along line SB-SB in FIG. 1 according to the embodiment;

FIG. 5 is an enlarged sectional view of a main part showing a press-formed state according to one embodiment.

FIG. 6 shows a blanking step according to one embodiment;
(A) is a top view of the punched work, (b) is the same side view.

FIG. 7 shows a first drawing step according to an embodiment;
(A) is a plan view of a formed work, and (b) is a schematic explanatory view showing a formed state.

FIG. 8 shows a second drawing step according to one embodiment,
(A) is a plan view of a formed work, and (b) is a schematic explanatory view of a second drawing step.

FIG. 9 shows a trimming step according to one embodiment;
(A) is a plan view of the completed display body sealing cover, (b)
FIG. 4 is a schematic explanatory view of a trimming step.

FIG. 10 is an enlarged cross-sectional view of a main part showing a positioning state of a display body sealing cover according to one embodiment.

FIG. 11 is a plan view of a display body sealing cover according to another embodiment of the present invention.

FIG. 12 is a plan view of a display body sealing cover according to another embodiment.

FIG. 13 is a plan view of a display body sealing cover according to still another embodiment of the present invention.

FIG. 14 is an enlarged sectional view of a main part showing a press-formed state of a display body sealing cover according to another embodiment of the present invention.

FIG. 15 is a schematic sectional view of an apparatus using a display body sealing cover according to a conventional example.

FIG. 16 is a plan view of a display body sealing cover according to a conventional example viewed from an inner surface side.

FIG. 17 is an enlarged cross-sectional view of a main part of the conventional example taken along line SA-SA in FIG. 16;

FIG. 18 is an enlarged cross-sectional view showing a press-formed state of a display body sealing cover according to a conventional example.

FIG. 19 is a cross-sectional view showing a warp of a display body sealing cover according to a conventional example.

FIG. 20 is an enlarged cross-sectional view showing a positioning state of a display body sealing cover according to a conventional example.

[Explanation of symbols]

 1, 1A, 1B, 1C Display body sealing cover 3 Cover part 5 Flange part 9, 9A, 9B1, 9B2, 11, 11A Flatness correction part 21 Punch 23 Dice 25, 25C Counter punch 29, 31 Convex part

Claims (6)

[Claims] 1. A thin metal sheet display cover comprising a cover having a convex sectional shape and a flange fixed to a substrate at a periphery of the cover, wherein at least one of the cover and the flange is provided with: A display body sealing cover, wherein a flatness correcting portion for correcting flatness of the cover portion or the flange portion by crushing in a thickness direction is provided in a circular shape. 2. The display body sealing cover according to claim 1, wherein the flattening portion is provided along the cover-side base of the flange portion. 3. The display body sealing cover according to claim 1, wherein the flattening section is provided along a side edge of the flange section of the cover section. cover. 4. The display body sealing cover according to claim 1, wherein the flattening portion is provided continuously or at a predetermined interval in a circular shape. cover. 5. A cover having a convex cross-sectional shape and a flange fixed to a substrate at a periphery of the cover, wherein at least one of the cover and the flange is crushed in a thickness direction of the cover or the flange. A method for manufacturing a thin metal sheet display body sealing cover provided with a flattening section for correcting flatness in a circular shape, wherein the flattening section is crushed and formed simultaneously with press forming of the display body sealing cover. A method for producing a display body sealing cover, characterized by comprising: 6. The method for manufacturing a display body sealing cover according to claim 5, wherein the pressing of the display body sealing cover is performed using a punch, a die, and a counter punch, and at least one of the punch and the counter punch. A method of manufacturing the display body sealing cover, wherein the crushing projection is provided, and the crushing is performed by the projection simultaneously with the press forming of the display body sealing cover.