JPH0547815U - Display device - Google Patents

Abstract

(57) [Abstract] [Purpose] The welding work of the display panel is easy, and the waterproofness of the case opening, the durability of the device and the productivity are improved. [Structure] The display panel 1, the operation button 2, the rim 3, and the frame member 21 form a display panel 26 that hermetically closes the case opening 6. Operation button 2 and frame member 2
1 is integrally molded by multicolor molding. Display glass 1
Is integrally formed with the frame member 21 by insert molding after multicolor molding of the operation button. Then, the frame member 21 is adhesively fixed to the rear surface of the rim, and the rim 3 is fixed to the case opening 6 by ultrasonic welding or the like.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a display device suitable for application to a marine meter or the like that requires high waterproof performance.

[0002]

[Prior Art]

 2. Description of the Related Art Conventionally, various display devices such as meters, which are attached to ships such as motor boats, require higher waterproof performance than general display devices attached to automobiles and the like. 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 through a packing 8. Then, the rim 3 was fixed to the case opening 6 by ultrasonic welding or the like. The display glass 1 is fitted and fixed to the opening 7 of the rim 3 via a packing 8. On the packing contacting surface of the rim 3, a water draining ridge 10 is provided so as to make the opening 7 waterproof. The operation button 2 is formed of an elastomer in a cup shape, and is fitted into the button mounting hole 11 provided in the rim 3 from the inside so that a part thereof protrudes to the outside. There is. The drainage mountain 12 is also integrally projected on the button contact surface. Like the case 5, the rim 3 is made of ABS resin or the like, and when ultrasonic welding is performed, the drainage ridges 10 and 12 are pressed against the operation button 2 and the packing 8 to prevent water, and to receive the repulsive force of the operation button 2 and the packing 8. While being welded to the opening 6 of the case 5. 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, 19 is stippling. Is.

[0003]

[Problems to be solved by the device]

 By the way, in the above-described 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 welded to the case opening 6 while receiving the reaction force. Since it is necessary, the welding work is troublesome, the workability is extremely poor, and the welding quality is kept constant due to variations in plate thickness of the display glass 1, operation buttons 2, packing 8, etc. and differences in pressing force. However, the water resistance of the marine meter was unreliable. For this reason, the control range of welding conditions was narrow, and the number of checks for confirming the quality of finished products increased, which was a major obstacle to improving productivity. Further, if the packing 8 deteriorates 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. It is to provide a display device capable of improving productivity and productivity.

[0005]

[Means for Solving the Problems]

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

[0006]

[Action]

 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]

Embodiments The present invention will be described in detail below based on 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, a frame member 21 made of ABS resin or the like is manufactured separately from the rim 3, and this 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 by a mold because the button is made of an elastomer. Since they cannot be molded at the same time, they are integrally formed by a conventionally known multicolor molding method to form the frame assembly 25, 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 is attached to the case 5 by fixing the rim 3 to the case opening 6 by ultrasonic welding, and hermetically seals the opening 6. Other configurations are the same as those of the above-described conventional device.

Thus, in the marine meter having such a configuration, 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. Certainly. Furthermore, since the rim 3 is ultrasonically welded to the case opening 6, the sealing property between these two members is 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. However, in the present invention, the display lens 1, Since the operation button 2 and the frame member 21 are integrally formed, there is no need to do so. Therefore, the setting of welding conditions and the welding operation and the check for confirming the quality after welding are simple and easy. Also, if packing is not required, the reliability and durability of the meter can be improved without worrying about deterioration of waterproofness due to deterioration.

Although the above embodiment has been described with respect to 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 that require waterproofness. 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 used for fixing.

[0010]

[Effect of the device]

 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 frame is fixed to the back surface of the rim to form a display panel, and the rim is fixed to the opening of the case by ultrasonic welding or the like.Therefore, when mounting the display panel to the case, a sealing member such as packing is not used. Since the case opening, the lens mounting opening of the display panel, and the button mounting opening can be sealed satisfactorily and surely without the need to provide them, the waterproof performance and durability of the device can be significantly improved. Further, if the packing is unnecessary, 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]

1 is a cross-sectional view taken along the 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.

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

4 is a sectional view taken along line IV-IV in FIG.

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)

[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 rear surface of the rim, and the rim is the case opening portion. A display device characterized by being fixed to the.