JPH0514984U - Small electronic devices - Google Patents

Abstract

(57) [Summary] [Purpose] When mounting the front case and the rear case on a small electronic device, the display window and the display panel are properly aligned without causing stress on the display panel and each case. To be able to. A rear case 10 to which a circuit board 13 is attached and a tubular projecting portion 11 is provided, a projection 16 that is loosely fitted to the tubular projecting portion 11, an elastic hook 17 and a fixing hole 18 are formed. Plate 15 and this fixed plate 1
5, a liquid crystal display panel 19 connected to the circuit board 13, and a boss 23 that is inserted into the display window 22 and the positioning hole 18 of the fixing plate 15 corresponding to the liquid crystal display panel 19 to position the fixing plate 15. A front case 21 in which the fixing plate 15 is formed, and the elastic hook 17 of the fixing plate 15 is engaged with the edge of the circuit board 13 of the rear case 10 to temporarily fix the fixing plate 10 in the plane direction, When the front case 21 is attached, the boss 23 is positioned in the positioning plate 1 of the fixing plate 15.
8 and the fixing plate 15 is positioned.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a small electronic device such as an electronic timepiece.

[0002]

[Prior Art]

 In an electronic timepiece such as a clock, as shown in FIG. 4, a timepiece case is divided into a front case 1 and a rear case 2, a circuit board 3 is mounted in the rear case 2, and the circuit board 3 is mounted. Then, the liquid crystal display panel 4 is attached to the liquid crystal display panel 4 with an adhesive through the action material 5, the display window 6 formed in the front case 1 corresponds to the liquid crystal display panel 4, and the front case 1 is attached to the rear case 2. There is also a structure. In such an electronic timepiece, since the circuit board 3 and the liquid crystal display panel 4 are incorporated in the rear case 2, it is easy to assemble the components and electrically connect the liquid crystal display panel 4 and the circuit board 3. However, when the front case 1 is attached to the rear case 2, there is a problem that the display window 6 of the front case 1 and the liquid crystal display panel 4 are misaligned. An electronic timepiece having a structure shown in FIG. 5 has been developed as an electronic timepiece which solves such a problem. In this type of electronic timepiece, a frame-shaped rib 7 is provided on the inner surface of the front case 1 around the display window 6, and the liquid crystal display panel 4 is inserted into the frame-shaped rib 7. The position of the liquid crystal display panel 4 is regulated so that the liquid crystal display panel 4 corresponds to the display window 6 of the case 1.

[0003]

[Problems to be solved by the device]

 However, in the electronic timepiece having such a structure, when the front case 1 is attached to the rear case 2, the liquid crystal display panel 4 fixed to the rear case 2 is forced by the frame-shaped rib 7 of the front case 1. Since the position is regulated, stress is applied to the liquid crystal display panel 4 and the front and rear cases 1 and 2, and the liquid crystal display panel 4 is cracked when the display failure occurs on the liquid crystal display panel 4 or when a shock is applied. There is a problem that 2 is damaged. The present invention has been made in view of the above circumstances, and its purpose is to prevent the display panel and each case from being stressed when the front case and the rear case are attached to each other, without causing stress. It is an object of the present invention to provide a small electronic device that can be properly aligned with a panel.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention has a rear case to which an electronic component is attached and a locking portion is provided, and an engaging portion which engages with the locking portion of the rear case and has a positioning hole. A fixed plate with a panel, a display panel attached to this fixed plate and electrically connected to electronic parts, a display panel attached to the rear case and corresponding to the display panel. The front plate has an inner surface and a boss that is inserted into the positioning hole of the fixed plate to form a boss for positioning the fixed plate. The boss on the inner surface of the front case is inserted into the positioning hole of the fixing plate to position the fixing plate and attach it to the rear case. Specially To.

[0005]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In the figure, 10 is a rear case made of synthetic resin. After this, a cylindrical protruding portion 11 and a support pillar 12 are formed at predetermined locations in the case 10, and a circuit board 13 is attached to the support pillar 12 with screws 14. A fixed plate 15 made of synthetic resin and having a substantially flat plate shape is provided in the rear case 10. A protruding portion 16 that engages with the cylindrical protruding portion 11 in a loosely fitted state is formed at a predetermined position on the rear side surface (right side surface in the drawing) of the fixing plate 15, and upper and lower edges of the circuit board 13 are formed at upper and lower edges. An elastic hook 17, which is an engaging portion for temporary fixing, is provided so as to project to the rear side (right side), and the front side (left side) is formed in a tapered shape at a predetermined position on the outer peripheral portion. 18 is provided penetrating the front and rear (left and right). Further, a liquid crystal display panel 19 is attached to the front side surface of the fixing plate 15 with an adhesive agent via a material 20. The liquid crystal display panel 19 electro-optically displays information such as time, and is electrically connected to the circuit board 13 by a flexible sheet (not shown). Further, a front case 21 made of synthetic resin is attached to the front side of the rear case 10. A display window 22 is formed in the front case 21 in correspondence with the liquid crystal display panel 19, and the fixing plate 15 is inserted into the positioning hole 18 of the fixing plate 15 on the inner surface of the front case 21. A boss 23 for positioning is provided so as to project rearward.

Next, a case of assembling such a clock will be described. First, as shown in FIG. 1, the circuit board 13 is attached to the support column 12 in the rear case 10 with screws 14. After that, the protrusion 16 of the fixed plate 15 is loosely fitted to the cylindrical protrusion 11 of the rear case 10, and the elastic hooks 17 of the fixed plate 15 are locked to the upper and lower edges of the circuit board 13. In this state, the protruding portion 16 is engaged with the cylindrical protruding portion 11 in a loosely fitted state, and the elastic hooks 17 are elastically deformably locked to the upper and lower edges of the circuit board 13, so that the fixing plate 15 is fixed to the surface. It is temporarily fixed so as to be movable in the directions (vertical direction in FIGS. 1 and 2 and front and back sides of the paper). In this state, the liquid crystal display panel 19 is adhered to the front side surface of the fixing plate 15 via the action material 19, and is electrically connected to the circuit board 13 by the flexible sheet. Then, the boss 23 of the front case 21 is inserted into the positioning hole 18 of the fixing plate 15 from the front of the rear case 10. At this time, since the front side of the positioning hole 18 is formed in a tapered shape, the boss 23 is smoothly inserted into the positioning hole 18. Thus, when the boss 23 is inserted into the positioning hole 18, the fixing plate 15 is temporarily fixed so as to be movable in the surface direction, so that the fixing plate 15 is appropriately moved in the surface direction according to the insertion of the boss 23. Accordingly, the liquid crystal display panel 19 provided on the fixing plate 15 moves accordingly and the liquid crystal display panel 19 and the display window 22 of the front case 21 correspond to each other. Good alignment is possible. After that, even if the front case 21 is pressed and attached to the rear case 10, no stress is generated on the liquid crystal display panel 19 and the front and rear cases 10 and 21, so that the display on the liquid crystal display panel 19 is different from the conventional case. The liquid crystal display panel 19 and the fixing plate 15 are attached to the front case 21 and the rear case so that the liquid crystal display panel 19 is not broken and the cases 10 and 21 are not damaged even if a defect occurs or a shock is applied. It can be satisfactorily fixed by 10 and 10.

In the embodiment described above, the elastic hook 17 of the fixing plate 15 is locked to the edge of the circuit board 13 of the rear case 10, but the invention is not limited to this, and as shown in FIG. A locking projection 26 having a locking hole 25 is provided on the inner surface of the case 10, and the elastic hook 17 of the fixing plate 15 is locked in the locking hole 25 of the locking projection 26 for temporary fixing. You may choose.

Further, although the liquid crystal display panel 19 is used as the display panel in the above-mentioned embodiments, the present invention is not limited to this, and for example, an electroluminescence panel or a plasma display panel may be used.

Furthermore, the present invention is not limited to the electronic timepieces such as the clocks described above, but can be widely applied to small electronic devices including a display panel such as a small electronic calculator and a small liquid crystal television.

[0010]

[Effect of the device]

 As described above, according to the present invention, when attaching the front case and the rear case, the engaging portion of the fixing plate is engaged with the engaging portion of the rear case in advance to move the fixing plate in the surface direction. Temporarily fixed as possible, and in this temporary fixed state, the boss of the front case was inserted into the positioning hole of the fixing plate to position the fixing plate with respect to the front case, and then the front case was attached to the rear case. Therefore, the display window and the display panel can be properly aligned with each other, and the display panel and each case are not stressed, and the display panel is defective or the display panel is cracked due to impact. The front and rear cases can be prevented from being damaged.

[Brief description of drawings]

FIG. 1 is an exploded sectional view of a clock to which the present invention is applied.

FIG. 2 is a sectional view of the clock of FIG. 1 in an assembled state.

FIG. 3 is an exploded cross-sectional view of another embodiment.

FIG. 4 is an exploded sectional view of a conventional clock.

FIG. 5 is a cross-sectional view of a conventional clock that is an improvement of FIG.

[Explanation of symbols]

 10 Rear Case 11 Cylindrical Projection 13 Circuit Board 15 Fixing Plate 16 Projection 17 Elastic Hook 18 Positioning Hole 19 Liquid Crystal Display Panel 21 Front Case 22 Display Window 23 Boss

Claims (1)

[Scope of utility model registration request] 1. A rear case to which an electronic component is attached and a locking portion is provided, and a fixing plate having an engaging portion that engages with the locking portion of the rear case and having a positioning hole formed therein. A display panel attached to the fixing plate and electrically connected to the electronic component, a display window attached to the rear case and corresponding to the display panel, and an inner surface of the fixing plate. A front case formed with a boss that is inserted into the positioning hole to position the fixed plate, and the fixed plate to which the display panel is attached has the engagement portion engaged with the locking portion of the rear case. Then, the front case is temporarily fixed so that it can move in the surface direction, and in this temporarily fixed state, the boss is inserted into the positioning hole of the fixing plate so that the fixing plate is positioned and mounted on the rear case. Small electronic devices, characterized in that attached.