JPS5918997A - Melody door alarm - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention detects the opening of a door using a magnetic sensor, and applies a pulse to a melody storage integrated circuit using a reed switch so that the melody is stored every time the door is opened. This invention relates to a melody door alarm that plays a melody using a sounding element connected to an integrated circuit.

Conventional Structure and Problems Conventional melody door alarms of this type start playing a melody when the door opens and stop playing the melody when the door closes. In general, the opening/closing time of a door is usually about 4 to 6 seconds, which is too short for a melody, and it is not very pleasant for the people in the house or the guests. .

Purpose of the Invention In view of the above conventional problems, the present invention allows a melody to be played for a certain period of time regardless of how long the door is open, and allows the user to play only one song according to the user's preference. It is an object of the present invention to provide a melody door alarm that can arbitrarily switch between playing different songs in sequence.

Structure of the Invention In order to achieve the above object, the present invention provides a melody storage integrated circuit with a first pin terminal that plays only one song for a certain period of time even if the door is opened and the door is closed; The second part, which plays different songs for a certain period of time each time.
A pin terminal is provided, and a changeover switch is provided which can arbitrarily switch between the first pin terminal and the second pin terminal.

According to the second structure, regardless of the time the door is open, the melody is played for a certain period of time, so that the family members can definitely recognize that there are visitors, and it is also pleasant for the guests. It is possible to give a good impression, and by changing the changeover switch, it is possible to play a melody according to the user's preference.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the accompanying drawings. Figure 1 shows the electronic circuit of the melody door alarm in one embodiment of the present invention, A is a melody memory integrated circuit, this melody memory integrated circuit allows a person to play one to eight songs, A variable resistor R1 for adjusting the melody tempo is connected between terminal 2 and pin terminal 3, and by adjusting this variable resistor R1, the melody tempo can be set to an appropriate speed. . The pin terminal 8 is connected to the negative side of the power battery B, and a resistor R3 and a capacitor C3 are connected in parallel between the pin terminal 9 and the positive side of the power battery B. It occurs. Pin terminal 10 is a monitor output terminal, and a variable resistor R4 for volume adjustment is connected between this monitor output terminal and the positive side of power supply battery B.
Katsuko 11 ■ Slider a of resistor R4 and pin terminal 11
A capacitor G4 and a resistor R5 are connected in series between. Also.

The pin terminal 11 is an input terminal of a preamplifier.

This preamplifier is built into the melody memory integrated circuit, and its output terminals are pin terminals 12 and 1.
3, and between these pin terminals 12 and 13, a transistor Q+ + Q2, capacitors C5 and C6, and a resistor R6 are connected as shown in FIG. 1 to constitute an amplifier section C. Further, a sounding body SP consisting of a speaker is connected to the amplifier section C via a capacitor C7 and the positive side of the power supply battery B. The pin terminal 16 is still connected to the positive side of the power supply battery B, applying a power supply type 11- to the melody memory integrated circuit. C1 is a capacitor connected in parallel with the power supply battery B, and this capacitor C1 is provided to stabilize the operation.

With S W + IrJ', lead, and switch, this reed switch SW1 can be installed on the lintel of a house. Further, a small auxiliary magnet sensor M is provided close to the rear of the reed switch SW1. On the other hand, a large magnet sensor M2 is additionally installed on the door near the reed switch SW1. Further, the auxiliary magnet sensor M1 and the large magnet sensor are reprinted so that they cancel each other out. Therefore, when the door is closed, reed switch SW,
is not affected by magnetic flux, and the contact is closed by the magnetic flux of the open magnet sensor M1.

SW2 has a first pin terminal 7 that plays only one song for a fixed period of time, approximately 10 seconds, even after the door is opened, and a different song that is played sequentially for a fixed period of time, approximately 10 seconds each time the door is opened. Second pin terminal 6 playing for 10 seconds
When the door is opened in the down position with this switch SW2 switched to the second pin terminal 6, the reed switch SW1 closes and the current flows through the capacitor C2. , />rus is applied to the second pin terminal 6. As a result, the melody memory integrated circuit operates, and each time the door is opened, a different song is sequentially played for a certain period of time by the sounding body SP, which is a speaker.

If the changeover switch SW2 is still switched to the first pin terminal 7, only one specific song will be played by the sounding body sp consisting of a speaker each time the door is opened.

Note that without the capacitor C2, if the door remains open, the contacts of the reed switch SW1 would remain closed, so the first pin terminal 7 or the second pin terminal 6 would be connected to the power source. The voltage remains applied,
Even after the melody has been played for a certain period of time, the power supply current of several hundred milliamps, which is almost the same as that during the performance, will continue to flow, and as a result, the power supply battery B will be depleted more quickly, but capacitor C2 should be provided. Therefore, even if the contacts of the reed switch SW1 are open and closed for a long time, the first pin terminal 7
Alternatively, it is possible to cut off the direct current applied to the second pin terminal 6. The resistor R2, which is still connected in parallel with this capacitor C2, discharges the charge stored in the capacitor C2) when the contact of the reed switch SW is opened.

FIG. 2 shows an example of the use of the melody door alarm according to an embodiment of the present invention, where D is the door, which is shown in an open state. M2 is the large magnetic sensor shown in FIG. 1, and E is the main body case housing the power supply battery B and electronic circuit shown in FIG.

When the door D is closed, the magnetic fluxes of the auxiliary magnet sensor M1 and the large magnet sensor M2 cancel each other out, and the contact of the reed switch SW1 remains open, and when the door D is opened, the auxiliary magnet sensor M1
The magnetic flux closes the contacts of the reed switch SWl, and the melody is played.

Effects of the Invention As described above, according to the present invention, the melody is played for a certain period of time regardless of how long the door is open, so that family members can certainly recognize that there is a visitor. It has the excellent feature of giving a pleasant impression to guests, and also being able to play a melody according to the user's preference by changing the ring switch.

[Brief explanation of drawings]

FIG. 1 is an electronic circuit diagram of a melody door alarm showing an embodiment of the present invention, and FIG. 2 is a perspective view showing an example of use of the melody door alarm. A...Meroti memory integrated circuit, D...Door, SW,...Reed switch, MI I M2
・°゛°°Magnetic sensor P・・ Sounding body, SW2
...Switching switch, 7...First pin terminal, 6...Second pin terminal. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure/SP

Claims (1)

[Claims] A melody door that detects the opening of a door with a magnetic sensor, applies a pulse to a melody memory integrated circuit through a reed switch, and causes a sounding body connected to the melody memory integrated circuit to play a melody each time the door is opened. In the alarm, the melody memory integrated circuit is programmed to have a melody memory when the door is opened, and even if the door is subsequently closed.
A first pin terminal that plays only a song for a certain period of time, and a second pin terminal that sequentially plays a different white picture for a certain period of time each time the door is opened, and the first pin terminal can be switched arbitrarily. A melody door alarm with a switch that can be used.