JPH052773U - Vibration generator - Google Patents

Abstract

(57) [Abstract] [Purpose] In a vibration generator for an alarm that is mounted on a mobile phone, pager, etc. for displaying an incoming call, noise reduction and small size are achieved without using a conventional small motor and eccentric weight. An object of the present invention is to provide an inexpensive vibration generator with good vibration efficiency. A coil 3 wound in a spiral shape is attached to both end surfaces of a non-magnetic bobbin case 1, and a magnet magnetized in the center of the bobbin case 1 in a direction perpendicular to a magnetic field direction generated when an electric current is passed through the coil. 4 is supported by a plurality of springs 5, and a low-frequency current that causes the bobbin case to resonate is applied to the coil to excite the bobbin case, whereby the bobbin case is a vibration generator that vibrates in a resonance state by torsional vibration.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention generates a vibration alarm attached to a mobile phone, pager, etc. The present invention relates to a vibration generator.

[0002]

[Prior art]

  Conventionally, this type of vibration generator has an external shape of 7 mmφ as shown in FIG. A structure in which an eccentric cam 8 is attached to the output shaft 9 of a cylindrical motor 7 of about 23 mm Used to generate vibration. However, since the eccentric cam that is the movable part is located outside It is expensive because it uses an expensive motor that is loud and has many components. There was a drawback.

[0003]

[Problems to be solved by the device]

  In order to eliminate these drawbacks, the present invention stores the movable part in a bobbin case, Sound is reduced, the number of components is further reduced, and the size is small and the vibration efficiency is good and inexpensive. It is an object to provide a vibration generator.

[0004]

[Means for Solving the Problems]

  The present invention includes a plurality of springs in a bobbin case made of non-magnetic material such as plastic. It is generated by the alternating current flowing through the spiral coil at both ends of the bobbin case It has magnets magnetized in the direction perpendicular to the magnetic field. Applying an alternating current to the coil attached to the end face to impart torsional vibration to the bobbin case. The vibration generator is configured as described above.

[0005]   That is, the present invention is as follows. Attach spiral coils to both ends of the non-magnetic bobbin case, At the center of the bobbin case, orthogonal to the magnetic field generated when a current is applied to the coil. A magnet having an N-pole and a S-pole direction is formed through a plurality of springs. The vibration generator is characterized by being fixed to a bobbin case. 2. Claim 1 In the built-in vibration generator, a large weight is added to the magnet A vibration generator characterized in that a magnet is provided. 3. Claim 1, Claim In the vibration generator of item 2, the magnet is generated by an alternating current flowing through the coil. And the bobbin case is configured to resonate at the frequency of the alternating current. It is a vibration generator.

[0006]

[Action]

  The vibration generator according to the present invention is a bobbin case made of a non-magnetic material such as plastic. A spiral coil is formed on both end faces of the coil and the direction perpendicular to the direction of the magnetic field created by the coil. The magnet with the NS pole magnetized on the bobbin case is held by a plurality of springs. Since it has a built-in structure, when an alternating current is applied to the coil, the bobbin case is screwed. Vibration occurs, so that the vibration frequency becomes low even if the shape of the bobbin case is small. On the other hand, the frequency of the current flowing in the coil current is adjusted to the magnet and bobbin case The size of the bobbin case is made longer by selecting the frequency at which the Vibration generator that resonates at a low frequency by adding weight to the magnet Can be

[0007]

【Example】

  FIG. 1 is a vertical sectional view of a vibration generator according to an embodiment of the present invention. Bobinke The coil 3 is spirally wound inside the coil bobbin 2 on both end surfaces of the base 1 to form a coil. A magnetic field is generated in the central axis direction of the bobbin case when an electric current is applied. Bo A magnet 4 supported by a plurality of springs 3 is arranged at the center of the bin case. The magnet 4 is perpendicular to the direction of the magnetic field generated by the current flowing through the coil. It has a structure in which the N pole and the S pole are magnetized. Applying an alternating current to the coil 3 Causes the magnet 4 to move so that the coil magnetic field direction and the magnet polarity are the same. Repel each other, and the different poles absorb each other, so the bobbin case follows the coil. Torsional vibration occurs depending on the direction of the applied alternating current. Furthermore, the vibration amount and vibration frequency If you want to change the ratio of tungsten etc. on the outer circumference of the magnet as shown in Fig. Change the spring rate of the spring by installing a heavy weight 6 Therefore, the vibration frequency can be controlled. AC current flowing in the coil The frequency of the magnet and bobbin case without resonance at a certain frequency. By doing so, the magnet and bobbin case vibrate with large amplitude. Therefore, the vibration alarm can be easily detected.

[0008]

[Effect of device]

  The vibration generator according to the present invention includes a bobbin case having a bobbin case made of a non-magnetic material. A coil that generates an AC magnetic field inside the case and a direction perpendicular to the magnetic field created by the coil With a structure in which a magnetized magnet is supported by a bobbin case with multiple springs. Therefore, the bobbin case is operated by the operation of the magnet when an alternating current is applied to the coil. Even if the shape is small, it will vibrate at a low frequency by It is possible to provide a vibration generator that is simple in construction and inexpensive.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of a vibration generator according to the present invention.

FIG. 2 is a longitudinal sectional view showing another embodiment of the vibration generator according to the present invention.

FIG. 3 is a perspective view showing a conventional vibration generator.

[Explanation of symbols]

1 bobbin case 2 coil bobbins 3 coils 4 magnets 5 springs 6 Weight (tungsten etc.) 7 Cylindrical motor 8 eccentric cam 9 Output shaft

Claims (3)

[Scope of utility model registration request] 1. A non-magnetic bobbin case is provided with spiral coils on both end surfaces thereof, and N is formed in the center of the bobbin case in a direction orthogonal to a magnetic field generated when a current is passed through the coil.
A vibration generator characterized in that a magnet having a pole S pole direction is fixed to the bobbin case via a plurality of springs. 2. The vibration generator according to claim 1, wherein
A vibration generator characterized in that a weight having a large mass is applied to a magnet and a magnet with a weight is provided. 3. The vibration generator according to claim 1 or 2, wherein the magnet and the bobbin case resonate at the frequency of the AC current by the AC current flowing through the coil. .