JP2511549Y2 - Display device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device suitable for use in a marine meter or the like which requires high waterproof performance.

[0002]

2. Description of the Related Art Conventionally, various display devices such as meters attached to ships such as motor boats are required to have higher waterproof performance than general display devices attached to automobiles. Therefore, conventionally, as shown in FIG. 5, a display panel 4 is formed by a display glass 1, an operation button 2 and a rim 3, and the display panel 4 is set in an opening 6 of a case 5 via a packing 8, The rim 3 was fixed to the case opening 6 by ultrasonic welding or the like. Display glass 1
Is fitted and fixed to the opening 7 of the rim 3 via a packing 8. On the packing contact surface of the rim 3, a drainage mountain 10 is provided so as to enhance the waterproof property of the opening 7. Operation button 2
Is made of an elastomer in a cup shape, is fitted into the button mounting hole 11 provided in the rim 3 from the inside, and a part thereof protrudes to the outside, and the flange portion 2 a is in close contact with the back surface of the rim 3. The drainage mountain 12 is also integrally provided on the button contact surface. Like the case 5, the rim 3 is made of ABS resin or the like.
It is pressed against the packing 8 for waterproofing, and is welded to the opening 6 of the case 5 while receiving the repulsive force of the operation button 2 and the packing 8. In addition, 13 is a backlight type liquid crystal display device, 14 is a light guide plate for guiding the light emitted from the light source 15 to the liquid crystal display device 13, 16 is a main body of the instrument, 17 is a rubber switch, 18 is a printed circuit board, and 19 is a dot. is there.

[0003]

By the way, in the above-mentioned conventional marine meter, the drainage ridges 10 and 12 of the rim 3 are pressed against the operation button 2 and the packing 8 during ultrasonic welding, and the rim 3 is received while receiving a reaction force thereof. Since it is necessary to weld to the case opening 6, the welding work is troublesome, the workability is extremely poor, and there are variations in the plate thickness of the display glass 1, operation buttons 2, packing 8, etc. It was difficult to keep the welding quality constant, and there was a problem in the reliability of the water resistance of the marine meter. Therefore, the control range of welding conditions is narrow,
The number of checks to confirm the quality of finished products increased, which was a major obstacle to improving productivity. Further, when the packing 8 deteriorates due to a change with time, there is a problem that the sealing performance of the opening 7 deteriorates.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and its purpose is to facilitate the welding work of the display panel, waterproof the opening of the case, and improve the durability of the device. An object of the present invention is to provide a display device capable of improving productivity and productivity.

[0005]

In order to achieve the above object, the present invention provides a display device in which a display panel is formed by a display glass, operation buttons and a rim, and a case opening is hermetically closed by the display panel. A frame member is provided on the back surface of the rim, the operation button and the frame member are integrally formed by multicolor molding, and the display glass is integrally formed with the frame member by insert molding. Is fixed to the rear surface of the rim, and the rim is fixed to the case opening.

[0006]

In the present invention, the waterproof property between the operation button and the frame member is achieved by integrally forming these members by multicolor molding. The waterproof property between the rim and the frame member is achieved by fixing the frame member to the rim.
The waterproof property between the display glass and the frame member is achieved by integrally forming these members by insert molding. Waterproofness between the rim and the case opening is achieved by fixing the rim to the case opening.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the embodiments shown in the drawings. 1 is a sectional view taken along the line I-I of FIG. 2, FIG. 2 is a front view showing an embodiment in which the display device according to the present invention is applied to a marine meter, and FIG. 3 is a sectional view taken along the line III-III of FIG. 4 is a sectional view taken along line IV-IV in FIG. In the figure, the same components as those in FIG. 5 are designated by the same reference numerals, and the description thereof will be omitted. In these drawings, in this embodiment, the frame member 21 made of ABS resin or the like is used for the rim 3
And the frame 21 is fixed to the back surface of the rim 3. The frame member 21 is formed integrally with the display glass 1 and the openings 23 and 24 to which the operation button 2 is attached. The operation button 2 is formed of an elastomer, and therefore is formed by a mold. Since the simultaneous molding cannot be performed, the frame assembly 25 is formed by integrally forming the frame assembly 25 by a conventionally known multicolor molding method, and this assembly and the display lens 1 are integrally formed by insert molding. The display panel 26 is formed by being fixed to the back surface of the rim 3 by welding, adhesion or the like. The display panel 26 has the rim 3 fixed to the case opening 6 by ultrasonic welding,
It is attached to the case 5 and hermetically seals the opening 6. Other configurations are the same as those of the conventional device described above.

Thus, in the marine meter having such a structure, the display lens 1 and the frame member 21 are integrally formed by insert molding, and the operation button 2 and the frame member 21 are integrally molded by multicolor molding. Therefore, the sealing property between these members is extremely good and reliable, no packing is required, and since the rim 3 and the frame member 21 are adhesively fixed, the sealing property between these members is also good and reliable. . Furthermore, since the rim 3 is ultrasonically welded to the case opening 6, the sealing property between these two members is also good and reliable. in addition,
In the past, when the rim 3 was ultrasonically welded, it was necessary to press the packing and the operation button against the case by the rim in order to enhance the draining effect by the drainage mountain, but in the present invention, the display lens 1 and the operation button 2 are preliminarily used. Since the frame member 21 is integrally formed, there is no need to do so. Therefore, the setting of welding conditions, the welding operation, and the check for quality confirmation after welding are simple and easy. If the packing is not required, the reliability and durability of the meter can be improved without fear of deterioration of waterproofness due to deterioration.

Although the above embodiment has been described for the case of being applied to a marine meter, the present invention is not limited to this, and it is needless to say that the present invention can be applied to various display devices which are required to be waterproof. is there. In the above embodiment, the rim 3 is directly ultrasonically welded to the opening 6 of the case 5, but the present invention is not limited to this, and the frame member 21 may be fixed.

[0010]

As described above, according to the display device of the present invention, the frame member and the operation button are integrally formed by a multicolor molding method, and the frame member and the display lens are integrally formed by insert molding. The display panel is formed by fixing this frame to the back surface of the rim, and the rim is fixed to the opening of the case by ultrasonic welding or the like.Therefore, when attaching the display panel to the case, a sealing member such as packing is used. Since it is not necessary to intervene, the case opening, the lens mounting opening of the display panel, and the button mounting opening can be satisfactorily and reliably sealed, and the waterproof performance and durability of the device can be significantly improved. Further, if the packing is not required, the work of mounting the display panel becomes simple and easy, and the assembling workability and the productivity can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view taken along line I-I of FIG.

FIG. 2 is a front view showing an embodiment when the display device according to the present invention is applied to a marine meter.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV of FIG. 2;

FIG. 5 is a cross-sectional view showing a conventional example of a marine meter.

[Explanation of symbols]

 1 Display Glass 2 Operation Button 3 Rim 4 Display Panel 5 Case 6 Case Opening 8 Packing 21 Frame Member 26 Display Panel

Claims (1)

(57) [Scope of utility model registration request] 1. A display device in which a display panel, an operation button and a rim form a display panel, and a case opening is hermetically closed by the display panel, wherein a frame member is provided on the back surface of the rim. The operation button and the frame member are integrally formed by multicolor molding, the display glass is integrally formed with the frame member by insert molding, the frame member is fixed to the rim back surface, and the rim is the case opening portion. A display device characterized by being adhered to.