JPS61172465A - Surface telephone tone ringer - Google Patents

Abstract

PURPOSE:To make the titled ringer small-sized and thin by adopting piezoelectricity to a ringer means and mounting the ringer means on a printed wiring board on which an internal circuit including an incoming signal processing circuit is provided. CONSTITUTION:A metallized film capacitor C1 cutting off a DC componenting an inputted signal, IC1' exclusive for an incoming signal processing circuit processing the signal whose DC component is cut off, an electrolytic capacitor C2 charged with the smoothed signal, other circuits and elements, a piezoelectric buzzer 4' serving as the ringer means for utilizing the piezoelectricity and a slide variable resistor 5 or the like are mounted on the printed wiring board 6 to constitute the internal circuit A. The piezoelectric buzzer 4' and the IC1' exclusive for the signal processing circuit or the like are mounted on the printed wiring board 6 to reduce the volume of the entire internal circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] This invention relates to an exposed telephone tone ringer connected to a telephone line.

[Background technology]

When connecting a telephone to a public telephone line, an exposed telephone tone ringer is required for each line, which generates a ringing tone to notify the user of an incoming call. FIG. 1 shows an example of an exposed telephone tone ringer circuit. When a signal is input to L and L2, the DC component in the signal is first cut off by the CI capacitor. The signal with the DC component cut is
It is input to terminals 1-8 of the incoming signal processing circuit 1, and after being rectified and smoothed by the incoming signal processing circuit 1, it is connected to the capacitor C2.
is charged to. When the voltage charged in the capacitor C2 exceeds a certain voltage, a signal is output from the second terminal of the incoming signal processing circuit 1. However, the dial pulse when making a call is also 1. ,．． 1.degree.2, the signal is output from the second terminal of the signal processing circuit 1 at this time as well. Therefore, the ringing means 4 must be made to operate only when the signal emitted from the No. 2 terminal is based on an incoming telephone signal. It is composed of

That is, if the voltage of capacitor C2 when there is an incoming signal is EI, and the voltage of capacitor C2 when imitating a telephone dial is E2, then both always have E,>E2.
There is a relationship between Therefore, in this circuit, the processing circuit 1
If a voltage detection circuit 2 is provided after the voltage detection circuit 2 and the detection setting voltage E3 of this voltage detection circuit 2 is set so that E,>E3>E2, when the input signal is an incoming signal,
The switching circuit 3 is turned on and when there is an output from the second terminal of the incoming signal processing circuit 1, this output signal is applied to the ringing means 4 to generate a ringing tone. On the other hand, when the input signal is a dial pulse, the voltage applied to the voltage detection circuit 2 is E2, the switching circuit 3 is in the OFF state, and even if there is an output from the No. 2 terminal of the incoming signal processing circuit 1, this No output signal is applied to the ringing means 4 and no ringing tone is generated. Therefore, using the internal circuit according to FIG. 1, an exposed telephone tone ringer is obtained that is free from malfunctions due to signals generated when turning the dial.

Conventionally, among the parts constituting the exposed telephone tone ringer mentioned above, electromagnetic speakers, electromagnetic buzzers, etc. have been used for the ringing means, and incoming signal processing circuits and other circuits have been made by combining multiple elements. It has been configured. However, with these sounding means and circuit configurations, the volume occupied by the entire internal circuit becomes large.
It has been a problem that an exposed telephone tone ringer formed by incorporating this circuit cannot be made smaller and thinner. [Object of the Invention] The present invention aims to provide a small and thin exposed telephone tone ringer. The purpose is

[Disclosure of the invention]

To achieve the above object, the present invention provides an exposed telephone tone ringer that is connected to a telephone line and generates a telephone ringing tone when an incoming telephone signal is input from the telephone line, which utilizes a piezoelectric phenomenon in its ringing means. is used, the incoming signal processing circuit is constituted by a dedicated IC, and the ringing means is mounted on a printed wiring board on which an internal circuit including the incoming signal processing circuit is provided. The gist is telephone tone ringer. The present invention will be explained below based on FIGS. 2 to 5 showing one embodiment. First, to explain internal circuit A, there is a metallized film capacitor CI that cuts the DC component in the input signal, and an IC dedicated to the incoming signal processing circuit that processes the signal from which the DC component has been cut.
, an electrolytic capacitor C2 for charging the smoothed signal, other circuits, elements, etc., a piezoelectric buzzer 4' which is a sounding means using piezoelectric phenomenon, a slide volume 5, etc. are mounted on the printed wiring board 6. As a result, this internal circuit A is configured. By the way, the above-mentioned ringing means 4
This cannot be done using an electromagnetic speaker. Also,
When using an electromagnetic buzzer, the electromagnetic coil requires an output sufficient to drive the diaphragm, so it is impossible to make it extremely compact. It is also difficult to miniaturize this because it is closely related to the frequency of the sound generated. Further, if the incoming signal processing circuit is not constructed from a dedicated IC1', each circuit such as a smoothing circuit, a voltage detection circuit 9, an oscillation circuit, and the elements constituting the circuits are required, and miniaturization is impossible. In contrast, with the exposed telephone tone ringer of this invention,
For example, as shown by number A in FIG. 3, as an example, a piezoelectric buzzer 4', a dedicated signal processing circuit ICI', etc. are assembled on a printed wiring board 6, so that the volume of the entire internal circuit can be reduced. can be converted into

Next, the structure of the body that houses the internal circuit A and the cover that covers this body will be explained. First, the body 11 that houses the internal circuit A has an outer cover 8.
an inner cover 10 for covering the internal circuit A;
The outer cover 8 on the surface of the body 11 is integrally formed with the outer cover 8 on the surface of the body 11.
The terminal plate 7 is arranged to be exposed at the inner position. Contains the parts that need to be exposed on the surface of the outer cover 8,
A boss 9 facing an opening 16 provided in the outer cover is formed on the surface of the inner cover 10.
The internal circuit A is housed in the cavity of the body 11, which is formed from the rear side toward the rear side.

For this reason, even if the outer cover 8 is removed during work such as wiring connections,
The internal circuit A is protected by the inner cover 10 and there is no risk of it being destroyed. When wiring (feed wiring, etc.) that passes through the inside of the outer cover to this exposed telephone tone ringer,
When the electric wire is passed through the wiring path 13 formed by the outer edge of the inner cover 10 being closer to the inner edge than the inner edge of the outer cover 8, as shown by the two-dot chain line in FIG.
The outer cover 8 can be placed over the body 11 without the electric wires being caught between the outer cover 8 and a protrusion on the body 11 -V, such as the inner cover 10. Furthermore, a protrusion 14 is provided at the outer edge of the wiring passage 13 in order to guide the electric wire so that it does not protrude outward from the wiring passage 13 and become a hindrance to covering the outer cover 8 over the body 11. When wiring the above-mentioned exposed telephone tone ringer from the outside, set the conditions such as the wiring method, the thickness of the wires, the number of wires, etc., and adjust the two-stage knockouts 15 arranged at various parts of the body 11 and cover 8 accordingly. By cutting out and forming wire passing holes of the appropriate number and size at the required positions, we were able to perform construction that was compatible with various wiring methods and improved workability and appearance. .

〔Effect of the invention〕

Since the exposed tone ringer according to the present invention has its internal circuit configured as described above, it can be made small and thin.

That is, - To give an example, the shape shown in Figures 3 to 5 is 70+am in length, 50mm in width, and 20+mm in height.
++m exposed telephone tone ringer can be created.

[Brief explanation of the drawing]

Figures 1 and 2 show the tone ringer circuit of 5FJ.
FIG. 3 is an exploded perspective view of an embodiment of the telephone tone ringer according to the present invention; FIG. 4 is a plan view of the body of the exposed telephone tone ringer according to the present invention; FIG. 5(a) is a plan view of the same tone ringer, FIG. 1'...Incoming signal processing circuit 4'...Piezoelectric buzzer
6...Printed wiring board 7...Terminal board 8...
Outer cover 9...Boss 10...Inner cover 11...
・Body 1'2...Back plate 13...Wiring passage 14...Protrusion 15...Two-stage knockout 16
・：・Opening A... Internal circuit C1... Metallized film capacitor C2... Electrolytic capacitor agent Patent attorney Takehiko Matsumoto Figure 1 Figure 2 Figure 3 Volume 5 (a) (b) ( C)

Claims (2)

[Claims] (1) In an exposed telephone tone ringer that is connected to a telephone line and generates a telephone ringing tone when an incoming telephone signal is input from the telephone line, a ringing means that utilizes a piezoelectric phenomenon is used, and an incoming signal processing circuit is used. An exposed telephone tone ringer comprising a dedicated IC, and wherein the ringing means is mounted on a printed wiring board on which an internal circuit including the incoming signal processing circuit is provided. (2) The exposed telephone tone ringer according to claim 1, wherein the ringing means utilizing a piezoelectric phenomenon is a piezoelectric buzzer.