JP4182372B2 - Electronics - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electronic device, and more particularly to an electronic device such as an electronic counter that can be mounted by exposing a flange portion on which a display, an operation key, and the like are disposed on the front surface of a panel.
[0002]
[Prior art]
FIG. 6 is a cross-sectional view showing a configuration of a conventional electronic device.
In FIG. 6, 1 is a panel, 2 is an electronic device, 3 is a flange part. Reference numeral 10 denotes a mounting hole provided in the panel 1, 20 denotes a main body of the electronic device, and 21 denotes a case. Reference numeral 22 denotes an operation portion provided on the flange portion 3 of the case 21, 23 denotes a packing, and g denotes a gap. Reference numeral 24 is a display window, 25 is a display, 26 is a push button switch, and 27 is a repeater. Then, the electronic device 2 in which the main body 20 of the electronic device is assembled in the case 21 is inserted into the mounting hole 10, and the electronic device 2 is mounted on the panel 1 with the flange portion 3 exposed to the front surface.
[0003]
The push button switch 26 is operated via the repeater 27 while viewing the display on the display 25 on the front surface of the mounted electronic device 2, and an output signal is sent out by the electronic circuit in the main body 20. As described above, the packing 23 is disposed in the gap g between the operation unit 22 and the case 21. Therefore, the packing 23 seals the gap g to prevent intrusion of water droplets and the like from the front surface of the panel 1, and the electronic circuit portion and the like mounted in the main body 20 are configured in a drip-proof structure.
[0004]
[Problems to be solved by the invention]
As described above, the conventional electronic device 2 seals the gap g between the outer periphery of the operation unit 22 and the case 21 with the packing 23, and isolates the electronic circuit unit in the main body 20 from the front side of the panel 1. Can be configured. However, in such a drip-proof structure in which the gap 23 between the operation unit 22 and the case 21 is sealed with the packing 23 as described above, it is necessary to secure the size of the gap g to a constant value with respect to the thickness of the packing 23. Become. For this purpose, it is necessary not only to keep the thickness of the packing 23 uniform, but also to improve the processing accuracy of the case 21 and the operation unit 22. When the processing error of the gap g occurs on the plus side and the side of the packing 23 in the minus direction, the packing 23 is loosely moved in the gap g. In addition, since the case 21 and the packing 23 are generally different materials and have different thermal expansion coefficients, the gap g is further increased due to a temperature change, making it impossible to substantially perform the drip-proof function.
[0005]
On the other hand, in the operation unit 22 of the conventional electronic device 2, a step is formed between the display unit 25 and the surface of the push button switch 26 as shown in the drawing. Therefore, the repeater 27 for operating the push button switch 26 is necessary, and the structure is complicated accordingly. In addition, there is a problem that the width of the operation unit 22 becomes thick, which hinders the downsizing of the apparatus.
[0006]
The present invention has been made to solve such problems of the conventional electronic device, and is a complete device that eliminates the need for a packing for sealing the gap between the operation unit and the case as in the conventional device. The purpose is to realize an electronic device that has a dust-proof and drip-proof structure to improve workability and reduce costs, and to make some parts also used for different models, thereby further reducing production costs. It is.
[0007]
[Means for Solving the Problems]
The present invention, the flange portion of the case of arranging the operation portion is mounted in the mounting hole of the panel is exposed to the front, a front cover for covering the flange portion is provided, the front cover, the contact portion of the panel, on the inside a rear cover which projects are integrally formed, and a blockade piece protruding is integrally formed on the outside, in a state of being mounted in the mounting hole of the panel to expose the flange portion to the front, back cover, the flange portion The sealing piece is an electronic device that seals the peripheral portion of the flange portion, and is filled with a gap formed between the flange portion and the panel. In addition, the electronic device includes a front case and a rear case that can be attached and detached. Further, the electronic apparatus is configured such that the depth of the rear case is set to a size corresponding to a model having a different mounting volume.
[0008]
The electronic device of the present invention is configured with a front cover that covers the flange portion of the case. The front cover is made of a corrosion-resistant material that stretches moderately, and the inner surface is molded to the same contour as the flange. In particular, a blocking piece projecting outward is provided on the periphery of the front cover of the present invention. The front cover provided with the sealing piece is directly put on the flange portion of the assembled electronic device. When the electronic device is mounted on the panel, the back surface of the cover fills the gap between the mounting surfaces, and the blocking pieces block the periphery. Such a double sealing function of the present invention constitutes a complete dustproof / dripproof electronic device.
[0009]
The case of the electronic device according to the present invention includes a detachable front case and a rear case. The front case is common to all products, and the rear case is made with a depth corresponding to the mounting volume of the electronic components. Therefore, the mounting hole of the panel can be processed uniformly, and the device can be transferred to an arbitrary position on the panel. Furthermore, the production cost of the “mold” for molding can be reduced, and the production cost can be reduced.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1. FIG.
FIG. 1 is an exploded perspective view showing the configuration of the first embodiment of the present invention, and FIG. 2 is an explanatory diagram showing the configuration of the assembled state of the first embodiment. In the embodiment of the present invention, different numerical symbols are used even for members similar to those of the conventional apparatus.
1 and 2, reference numeral 1 denotes a panel made of an iron plate or the like, and 2 denotes an electronic device. 3 is a surface sheet, 4 is an adhesive tape, and 5 is a case of the electronic device 2.
[0012]
The case 5 is formed of a synthetic resin and includes two parts, a front case 5a and a rear case 5b. FIG. 3 shows a cross-sectional view of the front case 5a. Reference numeral 50 denotes a flange portion of the case 5, 51 denotes a front plate of the flange portion 50, and 52 denotes a large and small exposure port penetrating the front plate 51. The exposure port 52 is composed of one rectangular large hole and five square small holes. 53 and 54 are through-holes and locking grooves formed on both side surfaces of the case 5, 55 is a saw-tooth groove, and 56 is a rail groove provided in the horizontal direction above and below the inner surface. The top sheet 3 is attached to the window frame constituted by the recesses of the front plate 51 through the adhesive tape 4. The sawtooth groove 55 is formed on the upper surface and both side surfaces, and the rail groove 56 is extended also to the rear case 5b side. Reference numeral 57 denotes a locking claw protruding from both side surfaces of the rear case 5b, which corresponds to the locking groove 54 of the front case 5a.
[0013]
Reference numerals 6 and 7 denote an operation board and a control board made of a printed circuit board, and 8 and 9 denote a terminal board and a power supply board made of the same members. The control board 7 and the power supply board 9 are guided by the upper and lower rail grooves 56 in the assembled state. 11 is a base and 12 is a terminal block. 61 is a display device such as an LCD that is mounted on the front surface of the operation board 6 and displays a 4-digit or 6-digit count value, 62 is a five push button switch that constitutes a setting key, and 63 is a connector plug. The operation unit 60 is configured. The display 61 and the push button switch 62 are opposed to the upper and lower exposure ports 52 and are exposed on the same plane along the front surface of the front plate 51 after assembly. 71 is a connector socket provided on the control board 7 and fits into the connector plug 63, 72 is a CPU (not shown), and 73 is a comb-like connection portion formed at the rear end.
[0014]
As shown in the figure, electronic components such as resistors and capacitors are mounted on the power supply board 9, and similar comb-like connection parts 83 and 93 are also formed on the rear ends of the power supply board 9 and the terminal board 8. Yes. The rear ends of the control board 7, the terminal board 8 and the power supply board 9 are integrally held by the base 11, and the respective comb-like connection parts 73, 83 and 93 are connectors on the inner surface side of the terminal block 12. To be electrically connected. The terminal block 12 connected to the control board 7 or the like is mechanically fixed to the base 11 with screws 13. In this way, the main body 10 of the electronic device 2 is configured by the operation board 6, the control board 7, and the like on which the electronic components are mounted, and is housed in the split case 5 including the front case 5a and the rear case 5b.
[0015]
The case 5 accommodating the main body 10 is inserted into the square mounting hole of the panel 1 from the back side where the terminal block 12 is provided. And the attachment frame 14 shown with the dashed-two dotted line of FIG. 2 is inserted from a back surface, and is attached to the trunk | drum of the front case 5a. When the mounting frame 14 attached to the back surface is tightened, the rear edge portion of the square frame type flange portion 50 is brought into close contact with the surface of the panel 1 so that the electronic device 2 is mounted on the panel 1. The adhesion force of the mounting frame 14 to the mounting surface of the flange portion 50 is adjusted by sawtooth grooves 55 formed on the upper surface and both side surfaces. The electronic device 2 such as the electronic counter shown in the first embodiment is installed at a production site or the like incorporating a conveyor system. And the boxing operation | movement of the product conveyed with a conveyor is controlled by the electronic counter 2 installed on-site.
[0016]
The inside of the flange portion 50 of the case 5 attached to the panel 1 is sealed with the top sheet 3 adhered to the recessed window frame of the front plate 51 with the adhesive tape 4. Accordingly, the display 61 and the push button switch 62 on the operation board 6 are isolated from the front side of the panel 1 that communicates with the atmosphere at the production site. Therefore, the sealing packing used in the above-described conventional apparatus is unnecessary, and the configuration in the vicinity of the flange portion 50 of the case 5 can be simplified. Further, since the rear edge portion of the thin square frame flange portion 50 made of a soft resin is brought into close contact with the surface of the metal panel 1 such as an iron plate by the mounting frame 14, this mounting surface is also sealed and the rear surface of the panel 1 is sealed. The side is isolated from the front side. Further, since the display 61 and the push button switch 62 are formed on the same plane, the push button switch 62 can be operated directly from the surface of the top sheet 3. At the same time, the width of the flange portion 50 is reduced, and the electronic device 2 can be downsized.
[0017]
FIG. 4 is a perspective view showing a configuration of a modification of the first embodiment.
As illustrated, in this modification, the depth L2 of the rear case 5b is configured to be smaller than the depth L1 of the rear case 5b in FIG. The rest of the configuration is the same as the electronic device 2 described above. The case 5 shown in FIG. 4 is a product using the same principle, and is applied to a heterogeneous electronic device 2 having a small mounting volume of electronic components. As is apparent from the figure, the front case 5a is commonly applied to all models. Therefore, according to this modification, the mounting holes of the panel 1 can be processed uniformly, and for example, the related electronic devices 2 can be moved to any position where they can be easily handled and collected. Further, not only can the production cost of the “mold” for resin molding be reduced, but there is also an advantage that the production cost can be reduced by mass production.
[0018]
Embodiment 2. FIG.
As shown in FIG. 5 in place of the surface sheet 3 and the adhesive tape 4 as means for sealing the contact surface between the flange portion 50 and the panel 1 described in the first embodiment with a closer contact. A front cover 20 is prepared. For the front cover 20, a silicone rubber having corrosion resistance and appropriately expanding and contracting like rubber is suitable, and the inner surface is formed in a shape similar to the contour of the flange portion 50. In FIG. 5 showing the structure of the front cover 20, (a), (b) and (d) to (f) are shown by a triangulation method with reference to FIG. The cross-sectional shapes in the XX and YY directions in Fig. (C) are shown in (f) and (b). Furthermore, a partial cross-sectional view enlarging the inside of the round frame in Fig. (F) is shown in (g).
[0019]
21 is a front cover of the front cover 20, and 22 is a side cover surrounding the upper, lower, left and right. Reference numeral 23 denotes left and right projecting portions of the surface cover 21, which are formed from the upper end to the lower end. Reference numeral 24 denotes a narrow back cover, which is formed by bending the open side of the side cover 22 in a direction perpendicular to the inside. The inner method Xi of the back cover 24 is made substantially equal to the body portion of the front case 5a. In particular, the front cover 20 of the present invention is provided with a blocking piece 25 protruding outward from the peripheral portion at the bent portion of the side cover 22 and the back cover 24 as shown in FIG. . The blocking piece 25 is inclined somewhat upward with respect to the side cover 22 and is set at an overhang angle θ = 100 °. For this reason, the cross-sectional shape in the vicinity of the bent portion forms a deformed “Y-shape” as shown in the enlarged view (g).
[0020]
Such a front cover 20 is directly put on the front surface of the assembled electronic device 2 and attached to the panel 1 by the mounting frame 14 as described above. When the mounting frame 14 is tightened, the tip end portion of the blocking piece 25 that protrudes in an inclined manner comes into contact with the surface of the panel 1. When the electronic device 2 is mounted on the panel 1 by the mounting frame 14, the compressed back cover 24 fills the gap between the mounting surfaces. Further, the sealing piece 25 that presses the surface of the panel 1 seals the peripheral portion thereof, thereby performing a double sealing function. As described above, according to the front cover 20 having the double sealing function, not only the gap between the front surface of the front case 5a but also the gap between the panel 1 and the case 5 is eliminated, and a complete dust-proof / drip-proof structure is configured.
[0021]
In the above-described embodiment, the case where the present invention is applied to an electronic counter has been described as an example. However, the present invention can also be applied to a case of another electronic device. In addition, the display unit and the push button switch provided in the operation unit are configured on the same plane, but the display unit and the switch are not limited to the display unit and the switch. Moreover, although the front case and the rear case are configured to be detachable by the locking grooves and the locking claws on both sides, the number and position of the detachable structures or the assembly structure of the main body are not necessarily limited to the embodiments.
[0022]
【The invention's effect】
The present invention provides an electronic device in which an electronic component is mounted on a printed circuit board provided inside a case by exposing the flange portion of the case in which the operation portion is disposed to the front surface and being mounted in a mounting hole of the panel. An electronic device was constructed in which the front surfaces of the component parts were formed on substantially the same plane and a surface sheet was attached to the front surface of the case.
Further, the present invention provides an electronic device in which an electronic component is mounted on a printed circuit board provided inside the case by exposing the flange portion of the case in which the operation unit is disposed to the front surface and mounting the panel in a mounting hole of the panel. An electronic device composed of a front case and a rear case that can be attached and detached is constructed.
In addition, an electronic device was configured in which the depth of the rear case was set to a size corresponding to a model having a different mounting volume.
Furthermore, the present invention provides an electronic device in which a flange portion of a case in which an operation unit is disposed is exposed to the front surface and is mounted in a mounting hole of a panel, and an electronic component is mounted on a printed board provided inside the case. The electronic device was provided with a front cover formed in a Y shape that covered the portion and deformed the cross-sectional shape of the contact portion between the flange portion and the panel.
[0023]
As a result, the display unit and push button switch on the operation board disposed inside are completely isolated from the front side of the panel. For this reason, the sealing packing like the conventional apparatus is unnecessary and the structure of the vicinity of a flange part can be simplified. In addition, since the operation unit of the operation unit is formed on the same plane, the operation unit and the like can be directly operated from the front surface, and the electronic apparatus can be downsized.
Further, the mounting holes of the panel can be processed uniformly, and the device can be transferred to an arbitrary position on the panel. Furthermore, the production cost of the “mold” for molding can be reduced, and the production cost can be reduced.
Moreover, in another embodiment, the front cover which covers the flange part of a case is comprised, and the sealing piece which protrudes outward is provided in the periphery part especially. With this configuration, the back surface of the cover fills the gap between the mounting surfaces, and the sealing piece seals the periphery thereof.
[0024]
Therefore, according to the present invention, the number of parts is reduced, the size is reduced, part of the case is also used for different models, the cost is low, the handling is convenient, and the electronic device has a complete dustproof / dripproof structure. Can be provided.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a configuration of a first embodiment of the present invention.
FIG. 2 is an explanatory diagram illustrating a configuration in an assembled state according to the first embodiment.
3 is a cross-sectional view of the front case of Embodiment 1. FIG.
FIG. 4 is an exploded perspective view of a modified example of the first embodiment.
FIG. 5 is an explanatory diagram showing a configuration of a front cover used in the second embodiment.
FIG. 6 is a cross-sectional view illustrating a configuration of a conventional electronic device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Panel 2 Electronic equipment 3 Top sheet 4 Adhesive tape 5 Case 5a Front case 5b Rear case 6 Operation board 7 Control board 8 Terminal board 9 Power supply board 10 Main body 20 of electronic equipment Front cover 21 Front cover 22 Side cover 23 Protruding part 24 Back face Cover 25 Sealing piece 50 Flange part 54 Locking groove 57 Locking claw 60 Operation part 61 Display 62 Push button switch L1 Depth L2 Depth X1 Internal method θ Extension angle

Claims (3)

In the electronic device in which the flange portion of the case in which the operation unit is disposed is exposed to the front surface and mounted in the mounting hole of the panel, and the electronic component is mounted on the printed circuit board provided inside the case,
A front cover that covers the flange portion is provided,
The front cover is provided with a contact portion of the panel, and the rear cover protruding is integrally formed on the inside, and a sealed piece protruding is integrally formed on the outside,
In a state where the flange portion is exposed on the front surface and is mounted in the mounting hole of the panel,
The back cover is compressed by the flange portion and the panel, filling a gap formed between the flange portion and the panel,
The electronic device according to claim 1, wherein the sealing piece seals a peripheral portion of the flange portion.   The electronic apparatus according to claim 1, wherein the case is configured by a detachable front case and a rear case.   3. The electronic apparatus according to claim 2, wherein the depth of the rear case is set to a size corresponding to a model having a different mounting volume.

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