JPH0548447U - Alarm device - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain an alarm device for alarms used in mobile phones and the like, which can generate both vibration and sound alarms in the same device. A lower yoke 2 made of a cylindrical soft magnetic material having a bottom is fixed to the inside of a closed housing 6, and an upper yoke 3 made of a hollow disk-shaped soft magnetic material is fixed to an end surface. A ring-shaped permanent magnet 1 magnetized in the thickness direction is fixed to a lower yoke 2 to form a magnetic circuit, and a leaf spring 5 is attached to a gap formed by the permanent magnet 1 and the lower yoke 2. An alarm device configured by inserting a fixed bobbinless coil 4 into which a leaf spring 5 is attached inside a housing 6 and an oscillator circuit 7 for supplying an alternating current to the coil 4 is attached outside the housing 6. is there.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an alarm device for informing an alarm used for a pager, a mobile phone and the like.

[0002]

[Prior Art]

 Conventionally, there are two types of alarm devices of this type: a system for generating and calling a sound and a system for generating and calling a vibration. As shown in FIG. 2, for example, an alarm device for generating vibration has a structure in which an eccentric weight 10 is attached to an output shaft 9 of a cylindrical coreless motor 8 to generate vibration. Further, the alarm device for generating a sound is configured to generate a sound by attaching a buzzer or the like.

Since the conventional alarm device is a device for notifying an alarm by transmitting vibration or sound, it is configured as a dedicated device for generating vibration or sound, so that the same alarm is generated. There was a problem that the device could not generate both vibration and sound alarms.

[0004]

[Problems to be solved by the device]

 An object of the present invention is to provide an alarm device that can generate both vibration and sound alarms in the same device.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the alarm device of the present invention has a lower yoke, which is made of a soft magnetic material and has a U-shaped cross section and a closed outer surface, on the inner side of a closed housing. Fixed to the bottom surface of the lower yoke, and fixed to the bottom surface of the lower yoke with a cylindrical or cylindrical permanent magnet magnetized in the long-axis direction. To form a magnetic circuit, and insert the coil fixed to the leaf spring of the diaphragm forming the upper surface of the housing into the space formed by the permanent magnet and the U-shaped lower yoke. This is an alarm device in which an oscillating circuit for supplying an alternating current to the coil is attached to the outside of the housing to change the frequency of the alternating current flowing in the coil to generate an alarm due to vibration or sound in the same device.

That is, according to the present invention, a lower yoke fixed to the inner bottom surface of a sealed housing, the outer shape of which is tubular and one of which is closed and which is made of a soft magnetic material and has a U-shaped cross section, and the lower yoke. A permanent magnet magnetized in the up-and-down direction of the lower and upper yokes, which has a plate-shaped upper yoke on the opposite end surface of the lower yoke and is fixed to the inner bottom surface of the lower yoke by providing a gap between A coil wound around the bobbinless fixed to a leaf spring forming the housing, which is inserted into a gap formed between the permanent magnet, the upper yoke, and the lower yoke, and the housing. An oscillator circuit for supplying an alternating current to the coil, which is attached to the outside, and is configured to generate both a vibration alarm and a sound alarm by changing the frequency of the alternating current supplied to the coil. To It is an alarm device.

[0007]

[Action]

 When a pulse wave or sine wave alternating current is applied from the oscillation circuit to the coil fixed to the leaf spring of the alarm device configured as described above and the frequency of the alternating current is changed, the frequency of 10 to 10 Vibration is generated at 100 Hz and sound is generated at a frequency of 100 to 1000 Hz, and both vibration and sound alarms can be generated by the same alarm device.

[0008]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a vertical sectional view of an alarm device of the present invention. In FIG. 1, a cylindrical lower yoke 2 having a U-shaped cross section is fixed to the inside of a closed housing 6, and a ring-shaped or columnar permanent magnet magnetized in the thickness direction is fixed. 1 is fixed to the lower yoke 2 to form a magnetic circuit, and a disk-shaped upper yoke 3 is fixed to the opposite end surface of the lower yoke of the permanent magnet 1, and the outer peripheral surface of the permanent magnet 1 and the lower A bobbinless coil 4 fixed to a leaf spring 5 made of a phosphor bronze alloy is inserted in the gap between the inner surface of the side yoke 2 and the leaf spring 5. Is attached inside the housing 6. An oscillator circuit 7 for supplying an alternating current to the coil 4 is attached to the outside of the housing 6.

In addition, the alarm device of the present invention is equipped with an automatic switching device for calling for a sound alarm and then calling for a sound alarm when there is no response for a few seconds. It is also possible to use an alarm device configured to be selected.

[0010]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects. By supplying an alternating current to the coil fixed to the leaf spring and changing the frequency of the alternating current, it is possible to provide an alarm device that can notify both vibration and sound alarms by the same device.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an alarm device of the present invention.

FIG. 2 is an external perspective view of a conventional alarm device.

[Explanation of symbols]

 1 Permanent magnet 2 Lower yoke 3 Upper yoke 4 Coil 5 Leaf spring 6 Housing 7 Oscillation circuit 8 Coreless motor 9 Output shaft 10 Weight

Claims (1)

[Scope of utility model registration request] 1. A lower yoke fixed to the inner bottom surface of a hermetically sealed housing, the outer shape of which is tubular and one of which is closed and which has a U-shaped cross section and is made of a soft magnetic material. A permanent magnet magnetized in a vertical direction of the lower yoke and the upper yoke, having a gap, and fixed to the inner bottom surface of the lower yoke, having a plate-shaped upper yoke on the opposite end surface of the lower yoke,
A bobbinless wound coil fixed to a leaf spring forming the housing, inserted into a gap formed between the permanent magnet, the upper yoke, and the lower yoke;
An oscillator circuit for supplying an alternating current to the coil, which is attached to the outside of the housing, and configured to generate both a vibration alarm and a sound alarm according to a change in the frequency of the alternating current supplied to the coil. Characteristic alarm device.