JPS6410978B2 - - Google Patents

Description

[Detailed Description of the Invention] (1) Technical Field of the Invention The present invention relates to a so-called push-dial telephone, and particularly to a structure of a telephone handset in which a dial operation section, a control section, and an operation section are incorporated into the handset. It is related to.

(2) Prior Art and Problems Conventionally, in this type of handset, the dial operation section includes dial buttons, dial switches, decorative panels, etc., which are integrated into a unit in advance, and this unit is screwed onto the housing of the handset. A structure in which it is fixed with a stopper is common.

However, with this structure, although it is easy to attach and detach the dial operating unit itself, it is not easy to disassemble and reassemble the unit for repair or maintenance. Also, since the control section and display section are attached separately, it takes time to assemble. Furthermore, since the decorative plate of the dial operation section is integrated with the dial buttons and the like, it is not easy to change the design such as the color scheme of the decorative plate.

(3) Purpose of the Invention The purpose of the present invention is to solve the above-mentioned problems with handsets, that is, to provide a handset structure that is easy to assemble and maintain, and is easy to deal with design changes. .

(4) Structure of the Invention The present invention provides a handset as described above, in which the decorative plate of the dial operation part is formed as a separate part from the casing of the handset, and this can be attached to and removed from the stepped part around the opening of the casing. The circuit elements of the dial operation section, control section, and display section are mounted on a common flexible printed circuit board along with a separate rigid mounting plate for each section, so that the sections between each section can be bent and bent. It is configured as a printed board unit, and a part of the printed board unit is attached by engaging with a claw integral with the decorative board, and another part of the printed board unit is screwed to a part of the casing side other than the decorative board. It is configured to be installed.

(5) Embodiments of the invention Hereinafter, embodiments of the invention will be described in detail with reference to the drawings.

FIG. 1 shows a telephone handset 1 according to the present invention.
FIG. The handset 1 basically consists of an inner portion 1A and an outer portion 1B.The inner portion 1A incorporates a transmitter 2 and a receiver 3, and the outer portion 1B includes a push-button dial operation section 4, A control section 5 and a display section 6 are incorporated.

2 is an exploded perspective view showing the configuration of the outer portion 1B of the handset 1, FIG. 4 is a partial vertical sectional view in the assembled state, and FIG. 5 is a view taken along arrow V-V in FIG. FIG. In these figures, reference numeral 10 indicates a housing, on which a decorative board 11,
The filter 12, light guide plate 13, seal plate 14, dial button 15, and printed board unit 16 are assembled.

The decorative board 11 is formed into an L-shape as shown in FIGS. 2 and 3, and has a surface portion 11a and a right-angled portion 11b. The surface portion 11a has a hole 11c through which the dial button 15 passes. Also, the right angle part 11b
are stepped portions 11a of the opening of the casing 10, which will be described later.
The width dimension is a little smaller than the surface part 11a due to the relief of the bracket 11b, and there are a pair of brackets 11 on the left and right sides of the surface part 11a.
d and the claw 11e are formed, and the bracket 1
1d has a claw 11f and a dovetail groove 11g, respectively.

The filter 12 serves as a display board for the display section 6 (FIG. 1), and is attached to the decorative board 11 by engaging the dovetail joint 12a on the lower surface with the dovetail groove 11g of the bracket 11d of the decorative board 11.

The light guide plate 13 is made of a material such as acrylic resin, and serves to illuminate the dial button 15 with light from a light emitting diode 18 mounted on the dial switch portion 16A of the printed circuit board 16, as will be described later. A hole 13a through which the dial button 15 passes is formed in the light guide plate 13, and two screw seats 13b are formed on the lower surface.

The seal plate 14 is made of an elastic material such as silicone rubber, and the dial button 15 is fitted into the protrusion 14a. The seal plate 14 functions to provide a click feeling when operating the dial button, and also functions as a drip-proof member. In addition, the seal plate 14
Buffer grooves 14b are formed vertically and horizontally between the protrusions 14a. This buffer groove 14b serves to prevent an adjacent dial switch from malfunctioning when one dial button 15 is pressed down to operate a dial switch 17, which will be described later.

The printed board unit 16 is a combination of a dial switch section 16A, a control section 16B, and a display section 16C using a flexible printed circuit board. In other words, the circuit elements of these parts 16A, 16B, 16C are mounted on a common flexible printed circuit board 16F, and a hard mounting plate 16PA, which serves as a reinforcing plate, is attached to each part.
It is installed together with 16PB and 16PC. As a result, the above-mentioned parts 16A, 16B, and 16C are integrated in a state in which they are bendably connected. In addition to the dial switch 17, the dial switch section 16A is equipped with the aforementioned dial button illumination diode 18. Control section 16
A control circuit element 19 is mounted on B. A light emitting element 20 for display is mounted on the display section 16C. The printed board unit 16 is provided with the claws 11 of the decorative board 11 described above.
Notches 16a and 16b with which the screws e and 11f engage, and holes 16c and 16d for set screws 21 and 22 are formed.

The assembly structure of the upper part 1B of the handset 1 is as follows. First, as shown in FIGS. 1 and 5, a stepped portion 10 is provided inside the opening of the housing 10.
a and 10b are formed in two stages. The upper stepped portion 10b is formed over the entire circumference of the housing opening, and the lower stepped portion 10a is formed only in a portion corresponding to the periphery of the light guide plate 13, especially as shown in FIG. There is. First, the lower stepped portion 10a
The light guide plate 13 is attached to the upper stepped portion 10b by adhesive, and then the decorative plate 11 is attached to the upper stepped portion 10b by adhesive as well. Note that for adhering the light guide plate 13 and the decorative laminate 11, especially for adhering the latter decorative laminate 11, a material that does not have a very strong adhesive force and can be peeled off at any time is used. This allows the decorative board 11 to be easily replaced, as will be described later.
In addition, this structure has the advantage that light leakage from the light guide plate 13 is prevented by the upper stepped portion 10b.

Next, the seal plate 14 with the dial button 15 fitted onto the protrusion 14a is inserted from the bottom of the housing 10,
Furthermore, the printed circuit board 16 is assembled. This assembly is performed on the printed circuit board 1 as shown in Figures 2 to 5.
The notches 16a and 16b of 6 are connected to the claws 11 of the decorative board 11.
e, 11f, then screw 21 into screw hole 1.
6c into the screw seats 15b of the light guide plate 13, and then screw the screws 22 through the screw holes 16d into the housing 1.
This is done by screwing into the screw seat 10b of 0.

The above assembly structure has the following advantages.

(b) First, assembly and maintenance work is easy. That is, the dial operating section, the control section, and the display section are configured as one printed board unit using a flexible printed circuit board, and assembled at one time. Furthermore, since a portion of the printed board unit is attached to the decorative board using nails, the number of screwed locations can be reduced accordingly, making attachment and removal easy.
Moreover, since a part of the printed board unit is fixed to the housing via the decorative board, alignment and retention of the printed board unit and the decorative board is difficult when screwing the conventional dial operation unit to the housing. can be realized in almost the same way.

(b) Also, if the decorative board is formed as a separate component,
Moreover, it is removably glued to the housing, so
It is easy to handle design changes such as color changes. That is, by removing the claws of the decorative board from the printed board unit and peeling off the adhesive portions to the housing, the decorative board can be removed from the housing and easily replaced with another decorative board.

(6) Effects of the Invention As described above, the telephone handset according to the present invention has advantages such as ease of assembly and maintenance, and ease of dealing with design changes, and has very large practical effects.

[Brief explanation of drawings]

The figures show an embodiment of a telephone handset according to the present invention, in which Fig. 1 is an external perspective view, Fig. 2 is an exploded perspective view showing the structure of the outer part, and Fig. 3 is an engagement of the decorative board and the printed board unit. FIG. 4 is a partially cut away side view showing the assembled state of the outer portion, and FIG.
FIG. 3 is a cross-sectional view along the arrow V-V in the figure; 1...Handset, 1A...Inner part of the handset, 1B...Outer part of the handset, 2
...Transmitter, 3...Telephone receiver, 4...Dial operation section, 5...Control section, 6...Display section, 10...Housing, 11...Decorative board, 11e, 1
1f...Claw, 12...Filter, 13...Light guide plate, 14...Seal plate, 15...Dial button, 16...Printed board unit, 16F...Flexible printed circuit board, 16A...Dial switch section, 16B ...Control section, 16C...
...Display section, 16PA, 16PB, 16PC
...Mounting plate, 17...Dial switch, 18...
...Light emitting diode, 19...Circuit element, 20...
Light emitting element, 21, 22...screw.

Claims (1)

[Scope of Claims] 1. In a push-dial telephone handset in which a dial operation section, a control section, and a display section are incorporated into the handset, the decorative plate of the dial operation section is formed as a separate part from the casing of the handset; The circuit elements of the dial operation section, control section, and display section are mounted on a common flexible printed circuit board, with separate rigid boards for each of the above sections. It is mounted together with a mounting plate and constituted as a printed board unit in which the above-mentioned parts can be bent freely, and a part of the printed board unit is attached by engaging with a claw integral with the decorative board, and the other part of the printed board unit is mounted. A telephone handset characterized in that the telephone handset is configured such that the part is attached to a part of the casing side other than the decorative board by screwing.