JPH08234671A - Environmental resistance protective cover and its attaching structure - Google Patents

Abstract

PURPOSE: To provide an inexpensive environmental resistance protetive cover with excellent assembling workability and its attaching structure by reducing the number of parts. CONSTITUTION: This cover is applied to the attaching structure of an electronic equipment 1 attaching the electronic equipment 1 to an attaching panel 2 by that the back 12 of the electronic equipment 1 is inserted into an opening 21 formed on the attaching panel 2, and the outer peripheral edge part 11a of the front part 11 of the electronic equipment 1 is abutted on the opening edge part 22 of the attaching panel 2. The environmental resistance protective cover 3 consists of a protective sheet 4 and a packing 5, and it covers the front surface of the electronic equipment 1. The protective sheet 4 is a rectangular tray shape, and is provided with a flange part 41 projecting toward the inside on the outer peripheral edge part. The packing 5 made of rubber forms seal parts 51, 52 sealing between the attaching panel 2 on the rear surface, and it forms a loading part 54 enveloping in the flange part 41 of the protective sheet 4 on the front surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display provided with a display screen and an operating section, an environmental protection cover for electronic equipment such as a counter, a meter, and a timer, and a mounting structure thereof.

[0002]

2. Description of the Related Art Conventionally, in a factory or the like, an electronic device as a display device equipped with a liquid crystal display or the like is mounted on a mounting panel as a means for displaying work instructions and production information. Such an electronic device may be exposed to a bad environment containing moisture or oil, and therefore, it may be protected by an environmental protection cover. Here, there is also one in which the environment protection cover is attached with a double-sided tape or a magnet, but such an attachment structure cannot obtain a sufficient dustproof effect or dripproof effect. Therefore, conventionally, an environmental protection cover as shown in FIG. 8 has been known. In FIG. 8, the back portion 12 of the electronic device 1 including a display is inserted into the opening 21 formed in the mounting panel 2. The electronic device 1 is mounted on the electronic device 1 by the bolts 6 and the mounting brackets 7 engaging the outer peripheral edge portion 11 a of the front portion 11 of the electronic device 1 with the opening edge portion 22 of the mounting panel 2. It is attached to panel 2. The conventional environmental protection cover covers the front surface of the electronic device 1 with the transparent film 4B, the screen is easy to see, and the touch button type electronic device 1 can also push the push button from the film 4B. In addition, since it is sealed with two rubber packings 5A and 5B, it is highly dustproof and waterproof, and since the frame 60 is made of stainless steel, it is an environmental protection cover even when used for a large display. It has the advantage that the shape of is difficult to collapse.

[0003]

However, in the prior art, a plurality of stainless steel plates 61, different from the film 4B,
62 and 63 are fastened to each other with screws 64 to form the frame body 60, and the frame body 60 and the film 4B and the mounting panel 2 are sealed, so that two packings 5A and 5B are required. . Therefore, the number of parts is large and the cost is high. In addition, since the number of parts is large, the assemblability is poor and the size becomes large.

The present invention has been made in view of the above-mentioned conventional problems, and provides an environment-resistant cover and a structure for mounting the same, which has a small number of parts, is inexpensive, is easy to assemble, and does not increase in size. The purpose is to

[0005]

In order to achieve the above object, the environmental protection cover according to claim 1 is made of a transparent, rectangular tray-shaped resin sheet, and extends at least inward at the outer peripheral edge. A protective sheet having a protruding flange portion, a rectangular frame as a whole, and a seal portion on the back surface,
A rubber packing that is attached to the outer peripheral edge of the protective sheet so as to wrap around the flange portion of the protective sheet on the front surface and seals between the protective sheet and the protective sheet. In the present specification, the term “seal” means that watertightness and airtightness are maintained to some extent and that dripproofness and dustproofness are exhibited.

According to a second aspect of the present invention, there is provided an environment-resistant cover mounting structure, wherein a back portion of an electronic device is inserted into an opening formed in the mounting panel, and an outer peripheral edge portion of a front portion of the electronic device is attached to an opening edge portion of the mounting panel. It is applied to a mounting structure of an electronic device for mounting an electronic device on a mounting panel by engaging with. The mounting structure of the environmental protection cover covers the front surface of the electronic device with the environmental protection cover according to claim 1, and the flange portion and the packing of the protective sheet are provided on the outer peripheral edge portion of the front portion of the electronic device and the opening edge portion of the mounting panel. It is characterized by being sandwiched between and.

In these inventions, a flange portion projecting at least inward is formed on the outer peripheral edge portion of the protective sheet, and the packing is mounted so as to wrap the flange portion, so that it protrudes inward. The flange portion and the packing can be sandwiched between the outer peripheral edge portion of the front portion of the electronic device and the opening edge portion of the mounting panel. Moreover, since both side surfaces of the flange portion are in close contact with the packing, the protective sheet and the packing are also sufficiently sealed, so that a high sealing effect can be obtained. Here, according to these inventions, since the flange portion for mounting the packing is formed on the transparent protective sheet, and the frame body is not formed by using a separate metal plate, the number of parts is reduced.

The environment-resistant protective cover of claim 5 is made of a transparent rectangular tray-shaped resin sheet, and has a protective sheet having a flange portion projecting toward at least one of an inner side and an outer side at an outer peripheral edge portion, and a whole. Is a rectangular frame, has a seal portion on the back surface, and a rubber packing which is attached to the outer peripheral edge portion of the protection sheet so as to wrap around the flange portion of the protection sheet on the front surface and seals with the protection sheet. I have it. The packing has an inner peripheral portion that protrudes inward and faces the protective sheet, and a space into which the outer peripheral edge portion of the front portion of the electronic device enters is formed between the inner peripheral portion and the protective sheet. ing.

Further, the environment-resistant cover mounting structure according to the sixth aspect is applied to the same electronic device mounting structure as the second aspect. The mounting structure of the environmental protection cover covers the front surface of the electronic device with the environmental protection cover according to claim 5, and an inner peripheral portion of the packing is provided between an outer peripheral edge portion of the electronic device and an opening edge portion of the mounting panel. It is characterized by being sandwiched.

In these inventions, since the packing is formed with the inner peripheral portion projecting inward, the inner peripheral portion of the packing is defined as the outer peripheral edge portion of the front portion of the electronic device and the opening edge portion of the mounting panel. It can be sandwiched between and. Therefore, a high sealing effect can be obtained. Here, according to these inventions,
Since the flange portion for mounting the packing is formed on the transparent resin sheet and the frame body is not separately formed by using the metal plate, the number of parts is reduced.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show a first embodiment. In FIG. 1, an electronic device 1 including a display has a substantially flat rectangular parallelepiped shape as shown by a chain double-dashed line, and a front portion 11 including a display screen slightly protrudes in four directions from a back portion 12. . The back portion 12 of the electronic device 1 is inserted into the opening 21 of the mounting panel 2 as shown in FIG. The mounting panel 2
The opening 21 is formed to be slightly larger than the back portion 12 of the electronic device 1 and slightly smaller than the front portion 11 of the electronic device 1. The electronic device 1 includes a push button (not shown) on the front surface 13 in addition to the display screen.

An environmental protection cover 3 is attached to the front portion 11 of the electronic device 1 shown in FIG. The environmental protection cover 3
Is composed of a protective sheet 4 made of a transparent and soft rectangular resin sheet, and a rubber packing 5 having a rectangular frame shape as a whole. The protective sheet 4 is, for example, 0.3
It is made of polyester with a thickness of about mm.

As shown in FIG. 3 (a), the protective sheet 4 is bent in the mounting direction D in the vicinity of the outer peripheral edge portion 40 to form a tray shape, and at the outer peripheral edge portion 40,
It has a flange portion 41 for mounting the packing 5. As shown in FIG. 2, the protective sheet 4 has a central portion 42 excluding the outer peripheral edge portion 40, as shown in FIG.
And covers the front surface 13 of the electronic device 1.

The flange portions 41 of the four side portions 44 of the protective sheet 4 shown in FIG.
It is formed as shown in FIG. That is, the side portion 4
The flange portion 41 of No. 4 is bent outward from the end portion 45 in the depth direction (mounting direction) D of the protective sheet 4 so as to project slightly outward, and is folded back inward at the outermost portion,
Further, the folded-back portion 46 projects inward.

On the other hand, the flange portion 4 of the corner portion 43 of FIG.
1 is formed as shown in FIGS. 3B and 4A. That is, in the corner portion 43, the resin sheet 4A is punched out as shown in FIG. 4B so that the protective sheet 4 can be folded back and the folded portions 46, 46 do not interfere with each other. By folding back the resin sheet 4A at the position of the alternate long and short dash line L1, the flange portion 41 of the corner portion 43 is formed, and the folding portions 46 and 46 of the flange portion 41 are formed in the corner portion 43 as shown in FIG. 3B. They are discontinuous with each other. In addition, as shown in FIG. 2, the adhesive 8 is interposed between the flange portion 41 and the packing 5.

The packing 5 has a back surface 50 having first and second sealing portions 51 and 52. These seal portions 51 and 52 are pressed against the opening edge portion 22 of the mounting panel 2 and prevent water droplets, oil droplets, and dust from entering between the mounting panel 2 and the packing 5. The first seal portion 51 projects obliquely outward in the shape of a strip and is provided outside the second seal portion 52. Meanwhile, the second
The seal portion 52 is a ridge having a semicircular cross section.

The packing 5 has a mounting portion 5 on the front surface 53.
4 are formed. The mounting portion 54 forms a groove having a T-shaped cross section and encloses the flange portion 41 of the protective sheet 4, whereby the packing 5 is mounted on the outer peripheral edge portion 40 of the protective sheet 4. Inner peripheral portion 5 of the mounting portion 54
The front portion 11 of the electronic device 1 is provided between the 4a and the protective sheet 4.
A space S into which the outer peripheral edge portion 11a enters is formed.

The folded portion 46 of the flange portion 41 of the protective sheet 4 and the inner peripheral portion 54a of the mounting portion 54 of the packing 5 are
As described below, the bolt 6 is clamped between the outer peripheral edge portion 11 a of the front portion 11 of the electronic device 1 and the opening edge portion 22 of the mounting panel 2 by the tightening force of the bolt 6.

The bolt 6 is screwed into the back portion 12 of the electronic device 1 and brings the electronic device 1 into contact with the mounting panel 2 via a mounting bracket 7 which comes into contact with the back surface of the mounting panel 2. As a result, the outer peripheral edge portion 11 a of the electronic device 1 engages with the opening edge portion 22 of the mounting panel 2 via the environment protection cover 3, the electronic device 1 is fixed to the mounting panel 2, and the packing 5 is provided. It has been sealed by.

The packing 5 has an outer peripheral edge portion 1 of the electronic device 1.
Escape prevention ridges 56 are formed to prevent the packing 5 from escaping outward when pressed by 1a. The escape prevention ridge 56 is, as shown in FIG.
The length of each side 57 is 1 along each side 57 of the packing 5.
/ 3 is provided.

Next, a method of mounting the electronic device 1 will be described. First, the mounting portion 54 of the packing 5 in FIG. 3A is expanded and then mounted on the flange portion 41 of the protective sheet 4.
After that, the environmental protection cover 3 is attached to the front portion 11 of the electronic device 1 of FIG. 1 by utilizing the elasticity of resin and rubber.
After the mounting, the back portion 12 of the electronic device 1 is inserted into the opening 21 of the mounting panel 2 as shown in FIG. 2, and the mounting bracket 7 is brought into contact with the rear surface of the mounting panel 2 to attach the bolt 6 to the electronic device 1. Screw in. As a result, the electronic device 1 is fixed to the mounting panel 2, and the packing 5 seals between the mounting panel 2 and the electronic device 1 by the tightening force of the bolt 6.

In the above structure, the environmental protection cover 3
Is a flange portion 41 formed by protruding the outer peripheral edge portion 40 of the protective sheet 4 inward, and the flange portion 4 protruding inward.
Since 1 is wrapped with packing 5, the protective sheet 4 and the packing 5 can be sandwiched between the outer peripheral edge portion 11a of the electronic device 1 and the opening edge portion 22 of the mounting panel 2.
Therefore, unlike the case where the cover is attached with the double-sided tape or the magnet, a sufficient sealing (dustproof / dripproof) effect can be obtained.

Here, the environmental protection cover 3 has a flange portion 41 for mounting the packing 5 on a protective sheet 4 made of resin, and does not form a frame body separately using a stainless plate. Therefore, it is not necessary to separately provide a frame body, and since packing for sealing with the frame body is unnecessary, the number of parts is remarkably reduced, the assemblability is improved, and the environmental protection cover 3 is inexpensive. It will be

Further, in this embodiment, since the groove of the flange portion 41 and the mounting portion 54 is formed in a T shape and the packing 5 is mounted on the protective sheet 4, it is difficult for the packing 5 to come off from the protective sheet 4. . Therefore, since it is not necessary to bond the protective sheet 4 and the packing 5, the materials of both can be freely selected. Therefore, since the protective sheet 4 can be made of polyester, for example, by making the protective sheet 4 thin, the push button of the electronic device 1 can be pressed from above the protective sheet 4, and even if it is large, The shape of the environmental protection cover 3 does not collapse. In addition, the transparency of the protective sheet 4 is high, so that the screen is easy to see.

As in this embodiment, the flange portion 41
It is preferable to interpose the adhesive 8 between the packing 5 and the packing 5 because the packing 5 is less likely to come off the protective sheet 4.

Further, as in this embodiment, the protective sheet 4
If the outer peripheral edge portion 40 is folded back to form the flange portion 41, the strength of the flange portion 41 is increased, so that there is an advantage that the shape of the environmental protection cover 3 is less likely to collapse. In addition, in the present embodiment, the folding portion 46 of the corner portion 43 of FIG.
Since 46 are discontinuous with each other, the corner portion 4
3, the flange portion 41 is easily bent, so that the environmental protection cover 3 is easily attached to the electronic device 1.

FIG. 6 shows the flange portion 4 according to the first embodiment.
A modification of No. 1 will be shown. Flange portion 41 shown in FIG.
Is bent inward from the end portion 45 in the depth direction D so as to project slightly inward, and is folded back outward, so that the folded-back portion 46 projects outward.

The flange portion 41 shown in FIG. 6B is bent outward from the end portion 45 in the depth direction D and protrudes slightly outward, and a reinforcing portion 47 made of the same material as the protective sheet 4 is provided. , And is adhered or welded to the protective sheet 4.

The flange portion 41 shown in FIG. 6C is bent inward from the end portion 45 in the depth direction D and slightly protrudes inward to form an L-shape. In addition, in the modification of FIG. 6C, the groove of the mounting portion 54 of the packing 5 is also formed in an L shape.

FIG. 7 shows a second embodiment. In the second embodiment, the protective sheet 4 is bent outward from the end portion 45 in the depth direction D to form the flange portion 41 protruding only outward. On the other hand, the packing 5 is the flange 4
A mounting portion 54 having an L-shaped groove for wrapping 1 is formed, and an inner peripheral portion 55 that protrudes inward and faces the protective sheet 4 is formed. An outer peripheral edge portion 11 a of the front portion 11 of the electronic device 1 is provided between the inner peripheral portion 55 and the protective sheet 4.
A space S in which is entered is formed. The inner peripheral portion 55
Is the outer peripheral edge portion 11 of the electronic device 1 that has entered the space S.
It is sandwiched between a and the opening edge portion 22 of the mounting panel 2. In this embodiment, since the protective sheet 4 is not sandwiched between the outer peripheral edge portion 11a of the electronic device 1 and the mounting panel 2, the flange portion 41 of the protective sheet 4 is attached to the packing 5 with the adhesive 9. It is preferable that the protective sheet 4 and the packing 5 are adhered to each other to seal the space between the protective sheet 4 and the packing 5 and that the packing 5 is hard to be separated from the protective sheet 4. The other structure is the same as that of the first embodiment, and the same portions or corresponding portions are designated by the same reference numerals, and the description and detailed illustration thereof will be omitted.

In each of the above-described embodiments, the example applied to the mounting structure of the electronic device 1 has been described, but the present invention can be applied to the mounting structure of electronic devices such as a counter, a meter, and a timer in addition to the display.

Further, the materials of the protective sheet 4 and the packing 5 are not limited to those in the above-mentioned embodiment, and various materials can be selected according to the environment of the factory to be used. Also,
The shapes of the seal portions 51 and 52 of the packing 5 can be set arbitrarily. Further, the transparency of the resin sheet used in the present invention may be such that the surface of the electronic device can be visually recognized, and does not need to be completely transparent. Further, the tray shape in the present invention is not limited to the shape of the central portion 42 of the protective sheet 4 as long as the protective sheet 4 is bent in the mounting direction D at the outer peripheral edge portion 40.

[0033]

As described above, according to the present invention,
Since the flange portion is formed on the outer peripheral edge of the protective sheet made of a resin sheet and the packing is attached to the flange portion, the number of parts is reduced, the cost is reduced, and the assemblability is improved. Even if the environmental protection cover is attached, it is possible to obtain the effect of not increasing the size.

Particularly, in the inventions of claims 1 and 2, since the flange portion of the protective sheet is projected inward and the flange portion is wrapped with packing, the portion is attached to the outer peripheral edge portion of the electronic device and the mounting panel. A high sealing effect can be obtained by sandwiching it with the edge of the opening. Further, since it is not necessary to bond the rubber packing and the resin constituting the protective sheet, the material can be freely selected, and therefore, for example, a resin having high transparency and excellent chemical resistance and oil resistance is used. be able to.

[Brief description of drawings]

FIG. 1 is a schematic exploded perspective view of a mounting structure showing a first embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view of the mounting structure.

FIG. 3 is an enlarged cross-sectional view showing a main part of the environmental protection cover,
(A) is a sectional view taken along the line IIIa-IIIa in FIG.
4B is a sectional view taken along line IIIb-IIIb in FIG.

FIG. 4A is an enlarged perspective view of a corner portion of a protective sheet,
(B) is an enlarged perspective view of the resin sheet before molding.

FIG. 5 is an enlarged perspective view showing a packing in section.

FIG. 6 is an enlarged cross-sectional view showing a modified example of a flange portion.

FIG. 7 is an enlarged vertical sectional view of a mounting structure showing a second embodiment.

FIG. 8 is an enlarged vertical sectional view of a mounting structure showing a conventional example.

[Explanation of symbols]

 1: Electronic device 11: Front part 11a: Outer peripheral edge part 2: Mounting panel 21: Opening 22: Opening edge part 3: Environmental protection cover 4: Protective sheet 40: Outer peripheral edge part 41: Flange part 46: Folding part 5: Packing 50: Front surface 53: Back surface 51, 52: Seal part 55: Inner peripheral part 8: Adhesive

Claims (8)

[Claims] 1. A transparent, rectangular tray-shaped resin sheet,
A protective sheet having at least an inwardly projecting flange portion on the outer peripheral edge; a rectangular frame shape as a whole, a seal portion on the back surface, and a flange portion of the protective sheet wrapped around the front surface for protection. An environmental protection cover, comprising a rubber packing that is attached to the outer peripheral edge of the sheet and seals between the sheet and the protective sheet. 2. The electronic device is mounted on the mounting panel by inserting a back portion of the electronic device into an opening formed in the mounting panel and bringing an opening edge portion of the mounting panel into contact with an outer peripheral edge portion of a front portion of the electronic device. In a mounting structure of an electronic device to be attached to a protective sheet, the protective sheet is made of a transparent rectangular tray-shaped resin sheet and has a flange portion protruding at least inward at the outer peripheral edge portion, and a sealing portion is provided on the back surface in a rectangular frame shape as a whole. The environment-resistant protective cover having a rubber packing that is attached to the outer peripheral edge of the protective sheet so as to wrap around the flange of the protective sheet on the front surface and has a rubber packing The front surface of the device was covered, and the flange part of the protective sheet and the packing were sandwiched between the outer peripheral edge part of the front part of the electronic device and the opening edge part of the mounting panel. Mounting structure for environmental protection cover, wherein the door. 3. The environmental protection cover according to claim 1, wherein an adhesive is inserted between the flange and the packing. 4. The environment-resistant cover mounting structure according to claim 2, wherein an adhesive is interposed between the flange and the packing. 5. An environmental protection cover for an electronic device, which is made of a transparent rectangular tray-shaped resin sheet and has a flange portion projecting inward or outward at an outer peripheral edge portion. And a rectangular frame shape as a whole, which has a sealing portion on the back surface, and which is attached to the outer peripheral edge portion of the protection sheet so as to wrap around the flange portion of the protection sheet on the front surface and seals between the protection sheet and A packing made of rubber, the packing having an inner peripheral portion projecting inward and facing the protective sheet, and an outer peripheral edge portion of a front portion of the electronic device between the inner peripheral portion and the protective sheet. An environmental protection cover that has a space for entering. 6. The electronic device is mounted on the mounting panel by inserting a back portion of the electronic device into an opening formed in the mounting panel and bringing an opening edge portion of the mounting panel into contact with an outer peripheral edge portion of a front portion of the electronic device. In the mounting structure of the electronic device to be attached to, a protective sheet made of a transparent rectangular tray-shaped resin sheet and having a flange portion projecting toward at least one of the inner side and the outer side at the outer peripheral edge, and the entire rectangular frame shape. Attached to the outer peripheral edge of the protective sheet so as to enclose the flange portion of the protective sheet on the front side and seal the gap between the protective sheet and the front surface, and protrude inward to face the protective sheet. The front surface of the electronic device is covered with an environment-resistant protective cover having a rubber packing having an inner peripheral portion that covers the inner peripheral portion of the packing and the outer peripheral portion of the electronic device. Mounting structure for environmental protection cover, characterized in that clamped between the opening edge of the mounting panel. 7. The environmental protection cover according to claim 1, 3 or 5, wherein the flange portion is formed by folding back an outer peripheral edge portion of the protective sheet. 8. The mounting structure for an environmental protection cover according to claim 2, wherein the flange portion is formed by folding back the outer peripheral edge portion of the protective sheet.