JP3651205B2 - Equipment with bonding material - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an apparatus including a bonding material, and more particularly to a bonding material mounting structure suitable for application to a timepiece including a cover glass formed by bonding two transparent plates.
[0002]
[Prior art]
Conventionally, for example, various types of glass have been used as a dial that forms the display unit of a wristwatch or a cover glass that is attached to the front side of a pointer, but this increases the rigidity and scratch resistance of the cover glass and increases the cost. In order to suppress it, as shown in FIG. 6, a laminated glass obtained by bonding a sapphire or other hard transparent plate 3 to the surface side of a normal glass plate 2 with a transparent adhesive or the like may be used. This laminated glass is pasted from the glass plate 2 side through a hard packing 11 made of a ring-shaped synthetic resin to an attachment frame portion 10a of a watch case 10 made of a case, a glass edge, or the like, like a normal cover glass. The laminated glass is fixed to the watch case 10 by press-fitting the laminated glass.
[0003]
[Problems to be solved by the invention]
However, when the laminated glass is attached to the watch case 10, stress is applied to the outer end surface of the laminated glass from the packing 11 in the direction opposite to the press-fitting direction. There exists a problem that 3 will peel from the glass plate 2 partially. Moreover, even if it does not peel at the time of press-fitting of the laminated glass, the outer end face of the laminated glass always receives stress in the plate surface direction from the packing 11 in a state of being attached to the watch case 10, so that after the laminated glass is attached, The hard transparent plate 3 on the surface side may be peeled off due to stress.
[0004]
In particular, the laminated center of the glass plate 2 and the hard transparent plate 3 may be displaced during the production of the laminated glass, and as shown by the dotted line in FIG. In a portion where the outer end surface of the hard transparent plate 3 is slightly outside, the hard transparent plate 3 is almost certainly peeled off. In order to prevent such a shift, both the glass plate 2 and the hard transparent plate 3 are formed slightly larger, and the glass plate 2 and the hard transparent plate 3 are bonded together, and then bonded as shown in FIG. There is also a method of eliminating the deviation by grinding the outer edge of the glass. However, this method requires a grinding process, which increases the manufacturing cost, and causes problems such as chipping or peeling at the outer edge of the laminated glass during grinding.
[0005]
Furthermore, since the fixing force of the laminated glass is obtained by the frictional force through the packing 11 between the end of the laminated glass and the watch case 10, the fixing force is unstable, and the laminated glass, There is a problem that the fixing glass may be lost due to the tightening allowance depending on the dimensions of the watch case and the packing or the surface roughness of the laminated glass, and the laminated glass may come off.
[0006]
Therefore, the present invention solves the above-mentioned problems, and the problem is that in the above-described wristwatch and other various devices, a bonding material such as a bonding glass is fixed to a mounting frame portion of a base such as a watch case. Another object of the present invention is to provide an attachment structure that can prevent the bonding material from falling off from the attachment frame portion and peeling of the bonding material during and after fixing.
[0007]
[Means for Solving the Problems]
The means taken by the present invention to solve the above-mentioned problems is to press-fit a bonding material composed of a surface material and a back material, which are adhered to each other, into the mounting frame portion of the base body with the back material as the back side. In this device , the bonding material is attached and fixed, and the bonding material is provided with a stepped portion with the outer edge of the surface material facing the mounting frame portion disposed inside the outer edge of the back material. A gap G between the step portions is in a range of 10 to 1000 μm, and the bonding material is fixedly attached by fixing the attachment frame portion into the step portion. Equipment.
[0008]
According to this means, since the outer edge of the surface material is arranged on the inner side of the outer edge of the back surface material, there is a step or an inclined portion at the outer edge end of the bonded material. By engaging with the frame portion, the attachment strength of the bonded material to the attachment frame portion can be improved. Further, since the outer edge of the surface material is on the inner side, the stress received from the mounting frame portion is smaller than that of the back surface material, so that the possibility of peeling of the surface material can be reduced.
Furthermore, the bonding material is subjected to stress from the side of the mounting frame portion on the opposite side to the press-fitting direction at the time of press-fitting, but since the outer edge of the surface material is arranged inside the outer edge of the back surface material, the surface material is The possibility of peeling can be reduced. In many cases, the surface material is always stressed inward from the side of the mounting frame even after press-fitting, but the possibility of peeling of the surface material due to this stress can also be reduced.
[0014]
Furthermore, the means taken by the present invention is to provide a bonding material composed of a surface material and a back material adhered to each other via a flexible material with respect to the mounting frame portion of the base body with the back material as the back side. a device for bonding material was securely attached by press-fitting, the bonding material, an outer edge of the surface material that faces the mounting frame portion of the step portion is disposed inside the outer edge of the backsheet The gap G between the step portions is in a range of 10 to 1000 μm, and the bonding material is fixedly attached by fixing the flexible material into the step portion. It is a device with materials. In this case, since the flexible material disposed between the attachment frame and the attachment frame is deformed when the bonding material is press-fitted, the attachment is surely performed with the gap between the attachment and the attachment frame being filled. Can do.
[0015]
Further, in each of the above means, the bonding material may be a light-transmitting cover material that covers the display portion. For example, the bonding material can be applied to a cover glass of a watch or other watch, a cover of a display surface of various electronic devices or display devices, and the like.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments according to the present invention will be described with reference to the accompanying drawings.
[0017]
(First embodiment)
FIG. 1 is an enlarged view of a main part of a first embodiment of a wristwatch according to the present invention. The watch case 10 is a wristwatch or a glass edge of a wristwatch, and an annular mounting frame portion 10a is formed at the center of the surface side. The mounting frame portion 10a is formed in a shape in which a vertical surface facing inward and a horizontal surface facing upward are orthogonal to each other. An engaging groove 10b that engages with the hard packing 11 is formed on the vertical surface in order to prevent the hard packing 11 made of synthetic resin from escaping upward.
[0018]
The glass plate 2 and the hard transparent plate 3 are respectively disk-shaped, and the hard transparent plate 3 is formed of a thin sapphire plate. The glass plate 2 and the hard transparent plate 3 are pasted together via the transparent adhesive layer 4. The laminated glass composed of the glass plate 2 and the hard transparent plate 3 is press-fitted with the glass plate 2 on the back side from below through the hard packing 11 as in the conventional case.
[0019]
In this embodiment, in the outer edge part of bonded glass, it forms so that the outer edge end surface of the hard glass plate 3 may be located inside about 20-200 micrometers rather than the outer edge end surface of the glass plate 2. FIG. The interval G between the outer edge end surface of the glass plate 2 and the outer edge end surface of the hard transparent plate 3 can be arbitrarily configured, but is preferably in the range of about 10 to 1000 μm. If the gap G is narrower than this range, the effect described later is reduced, or the effect cannot be obtained at all due to the deviation between the glass plate 2 and the hard transparent plate 3 at the time of bonding. This is because if G is wide, the difference in the position of the outer edge between the glass plate 2 and the hard transparent plate 3 is clearly visible, which is not preferable in appearance.
[0020]
In the case of FIG. 1, since the gap G is relatively narrow, the hard packing 11 comes into contact with the outer end surface of the hard transparent plate 3 when the hard packing 11 is crushed and deformed by press fitting of the laminated glass. However, the gap G may be made larger so that the hard packing 11 does not contact the outer end face of the hard transparent plate 3.
[0021]
In this embodiment, since the outer end surface of the hard transparent plate 3 is in a position drawn into the inner side of the glass plate 2, the hard transparent plate 3 has an upward direction opposite to the press-fitting direction even when the laminated glass is pressed. Stress is hardly applied, and peeling of the glass plate 2 and the hard transparent plate 3 can be prevented. Moreover, as shown in the drawing, the hard packing 11 sandwiched between the laminated glass and the mounting frame portion 10a is between the glass plate 2 and the hard transparent plate 3 formed on the outer edge of the laminated glass. Since it deform | transforms so that it may bite into the formed level | step-difference part, the adhering force with respect to the timepiece case 10 of a laminated glass can be increased. Further, even after the laminated glass is fixed to the watch case 10, the stress received from the hard packing 11 of the hard transparent plate 3 is reduced, so that the exfoliation of the hard transparent plate 3 due to the stress is prevented afterwards.
[0022]
(Second Embodiment)
Next, a second embodiment according to the present invention will be described with reference to FIG. In this embodiment, an adhesive is applied to at least one of the laminated glass and the mounting frame portion 10a of the watch case 10, and then the laminated glass composed of the glass plate 2 and the hard transparent plate 3 is attached to the mounting frame portion 10a. It is glued. Also in this embodiment, the outer edge end surface of the hard transparent plate 3 is inwardly drawn than the outer edge end surface of the glass plate 2, and the distance between the outer edge end surface of the glass plate 2 and the outer edge end surface of the hard transparent plate 3. G has substantially the same value as in the first embodiment.
[0023]
In this embodiment, the laminated glass is not press-fitted into the mounting frame portion 10a, but is simply bonded to each other by the adhesive layer 12. Therefore, the glass plate 2 and the hard transparent plate at the time of bonding or after manufacture are used. 3, there is almost no risk of peeling off from the surface 3, but a stepped portion is generated on the outer edge end surface portion of the laminated glass due to the presence of the gap G, and this stepped portion increases the adhesive strength of the laminated glass to the watch case 10. be able to.
[0024]
(Third embodiment)
Next, a third embodiment according to the present invention will be described with reference to FIG. In this embodiment, a laminated glass composed of the glass plate 2, the hard transparent plate 3, and the transparent adhesive layer 4 similar to the above is used, but the groove shape is obtained by forming the protruding edge portion 10 d on the watch case 10. And a soft packing 13 made of a ring-shaped synthetic rubber or the like is accommodated in the mounting frame portion 10c. The thickness of the soft packing 13 is formed slightly thicker than the thickness of the glass plate 2 of laminated glass. On the other hand, in the laminated glass, a gap G between the outer edge end face of the glass plate 2 and the outer edge end face of the hard transparent plate 3 is set larger than that in the first and second embodiments, and is set to an interval of about 1 to 3 mm.
[0025]
When the laminated glass is press-fitted into the mounting frame portion 10c via the soft packing 13, the soft packing 13 is deformed along the stepped portion of the outer edge portion of the laminated glass with the gap G as shown in FIG. A protruding portion 13a that protrudes on the stepped portion is formed. Depending on the value of the gap G, the height of the stepped portion, the material and size of the soft packing 13, the tip of the protruding portion 13a may or may not contact the outer edge of the hard transparent plate 3.
[0026]
When the protruding portion 13a of the soft packing 13 is in contact with the outer edge of the hard transparent plate 3, the hard transparent plate 3 receives stress from the soft packing 13 toward the inside. Not normal. In this case, since the stepped portion between the glass plate 2 and the hard transparent plate 3 is completely covered with the protruding portion 13a and cannot be visually recognized, there is no defect in appearance.
[0027]
On the other hand, when the protruding portion 13a of the soft packing 13 does not contact the outer edge of the hard transparent plate 3, the hard transparent plate 3 is not subjected to any stress from the soft packing 13, so that there is no risk of peeling of the hard transparent plate 3. It is greatly reduced. In this case, a stepped portion between the glass plate 2 and the hard transparent plate 3 appears in appearance. However, since most of the stepped portion is covered with the protruding portion 12a of the soft packing 12, the appearance is usually not greatly impaired.
[0028]
According to this embodiment, the protruding portion 13 a of the soft packing 13 rides on the step portion formed between the glass plate 2 and the hard transparent plate 3, so that the laminated glass is firmly attached to the watch case 10. Can be fixed. Moreover, while the possibility of peeling of the hard transparent plate 3 at the time of press-fitting of the laminated glass can be greatly reduced, peeling of the laminated glass after manufacture can also be prevented. In order to completely prevent peeling of the laminated glass, as shown in FIG. 3, the gap G and the thickness of the glass plate 2 are set so that the protruding portion 13 a of the soft packing 13 does not contact the outer edge of the hard transparent plate 3. (Corresponding to the height of the stepped portion), the thickness and width of the soft packing 13, the shape and size of the mounting frame portion 10c, the shape and size of the protruding edge portion 10d, etc. are appropriately designed so that the rigid transparent plate It is preferable to eliminate the stress that 3 receives.
[0029]
In order to realize the structures of the first to third embodiments described above, as shown in FIG. 4, the outer diameter R of the glass plate 2 of the laminated glass to be fixed to the watch case 10 is changed to that of the hard transparent plate 3. It is necessary to make it larger than the outer diameter r. In this way, if R> r, ideally the hard transparent plate 3 ′ has a center position that coincides with the center O of the glass plate 2 as in the hard transparent plate 3 ′ shown by the alternate long and short dash line in the figure. The outer edge end face can be positioned inside the outer edge end face of the glass plate 2.
[0030]
However, as shown in FIG. 4, it is usually difficult to accurately match the center position O of the glass plate 2 and the center position O ′ of the hard transparent plate 3, and the centers of both are shifted at the time of bonding. That is also fully conceivable. In order to avoid such a risk, the diameter difference between the outer diameter R of the glass plate 2 and the outer diameter r of the hard transparent plate 3 is made larger than the maximum positional deviation amount S at the time of bonding, that is, R> By setting r + S, the outer edge end surface of the hard transparent plate 3 can be more reliably located on the inner side than the outer edge end surface of the glass plate 2 as shown in FIGS. . Here, although the maximum amount of positional deviation varies depending on the bonding method, it is usually about 10 to 30 μm.
[0031]
In order to superimpose two plate-like bodies having different outer diameters such that the center positions coincide with each other, the plate-like body having a larger outer diameter is fixed, and the plate-like body having a smaller outer diameter is fixed from the periphery. Positioning while pressing inward with a plurality of elastic bodies such as springs and rubber (synthetic rubber), or a plurality of abutting materials supported by these, or matching the outer diameter of the two plate-like bodies There are methods such as positioning a plurality of members having a tapered or stepped outer peripheral surface with a plurality of members around the plate-like body.
[0032]
FIG. 5 shows an outer end portion of a laminated glass having a shape different from the above that can be used in the present invention. In this laminated glass, the glass plate 2 ′ is provided with two portions having different outer diameters in the thickness direction. That is, a lower end surface portion 2′a and an upper end surface portion 2′b are provided in the thickness direction in the outer edge portion of the glass plate 2 ′, and the lower end surface portion 2′a is placed outside the upper end surface portion 2′b. They are arranged so that a stepped portion 2′c is formed between them. Here, the outer edge position of the glass plate 2 ′ is only the position of the lower end surface portion 2′a.
[0033]
The outer edge end surface of the hard transparent plate 3 is formed at the same position as the upper end surface portion 2′b, and the gap G between the lower end surface portion 2′a and the outer edge end surface of the hard transparent plate 3 is the stepped portion 2 described above. It almost coincides with the level difference of 'c.
[0034]
In such a laminated glass structure, the upper end surface portion 2'b of the glass plate 2 and the outer edge end surface of the hard transparent plate 3 can be positioned at the time of laminating, and therefore accurate without causing a center shift. Can be bonded to each other, and since the stepped portion is at a low position, the laminated glass can be securely held by packing and the holding force can be increased, thus improving the attachment strength of the laminated glass. Can be made. In addition, said step part 2'c does not need to be comprised by the horizontal surface like illustration, and may be comprised by the inclined surface.
[0035]
In each of the above embodiments, the present invention is applied to a fixing structure of a cover glass that is a bonded glass of a wristwatch. However, the present invention is not limited to such a structure, and bonded to various devices. The present invention can be applied to a mounting structure between a material and a mounting frame portion of a base.
[0036]
Moreover, in the said embodiment, although the structure which attached the laminated glass to the inner side of the attachment frame part formed in cyclic | annular form is demonstrated, even if it does not attach a laminated glass over the perimeter in this invention, In other words, it may be attached only in places on the entire circumference, and is not limited to the structure attached to the inside of the annular portion, but may be any shape as long as it is an attachment structure of a bonding material and an attachment frame, for example, an elliptical shape. It can be applied to attachment to a polygonal part such as a rectangle.
[0037]
【The invention's effect】
As described above, according to the present invention, since the outer edge of the front surface material is arranged on the inner side of the outer edge of the back surface material, there is a step at the outer edge end portion of the bonded material. The attachment strength with respect to the frame portion can be improved. Further, since the outer edge of the surface material is on the inner side, the stress received from the mounting frame portion is smaller than that of the back surface material, so that the possibility of peeling of the surface material can be reduced.
[Brief description of the drawings]
FIG. 1 is an enlarged sectional view showing a main part of a first embodiment according to the present invention.
FIG. 2 is an enlarged cross-sectional view showing a main part of a second embodiment according to the present invention.
FIG. 3 is an enlarged sectional view showing a main part of a third embodiment according to the present invention.
FIG. 4 is a schematic plan view for illustrating a planar shape of a laminated glass in each embodiment.
FIG. 5 is an enlarged cross-sectional view showing an outer end portion of a laminated glass different from each embodiment.
FIG. 6 is an enlarged sectional view showing a conventional technique.
FIG. 7 is an enlarged cross-sectional view for explaining a conventional grinding process of the outer edge of a laminated glass.
[Explanation of symbols]
2, 2 'Glass plate 2'a Lower end surface portion 2'b Upper end surface portion 2'c Stepped portion 3 Hard transparent plate 4 Transparent adhesive layer 10 Watch case 10a, 10c Mounting frame portion 11 Hard packing 12 Adhesive layer 13 Soft packing G interval

Claims (3)

A bonding material composed of a surface material and a back material adhered to each other is a device in which the bonding material is attached and fixed by press-fitting the back material to the mounting frame portion of the base body ,
The bonding material is provided with a stepped portion with the outer edge of the surface material facing the mounting frame portion being arranged on the inner side of the outer edge of the back surface material ,
The gap G between the step portions is in the range of 10 to 1000 μm,
The apparatus provided with a bonding material, wherein the bonding material is fixedly attached by fixing the mounting frame portion into the stepped portion . Attach the bonding material by pressing the bonding material consisting of the surface material and the back surface material, which are attached to each other, into the mounting frame part of the base body through the flexible material with the back surface material at the back side. A fixed device ,
The bonding material is provided with a stepped portion with the outer edge of the surface material facing the mounting frame portion being arranged on the inner side of the outer edge of the back surface material ,
The gap G between the step portions is in the range of 10 to 1000 μm,
The device provided with the bonding material, wherein the bonding material is fixedly attached by fixing the flexible material into the stepped portion . 3. The device including the bonding material according to claim 1 , wherein the bonding material is a light-transmitting cover material that covers the display portion.

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