JPH0590927U - Anti-vibration device for transformer - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce the wasted space between the transformer and the magnetic member in the vicinity thereof, and to make the transformer device compact. [Structure] A magnetic force absorption member 15 made of a magnetic material that absorbs a magnetic force generated from a coil 13 of a transformer 12 is arranged between a transformer 12 and a metal plate 14 which is a magnetic member arranged in the vicinity thereof.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention is to prevent vibration of a magnetic member due to magnetic force generated from a coil of a transformer in a vibration isolator of a transformer device, and more specifically, in a transformer device in which a magnetic member such as a metal plate is arranged near the transformer. Regarding the device.

[0002]

[Prior Art]

 In an electric device using a transformer (transformer device), a magnetic member such as a metal plate is usually arranged around the transformer in order to cover the transformer. A portion of such a transformer device is shown in FIG. In FIG. 4, the transformer (2) is attached to the printed wiring board (1), and the metal plate (4) is arranged so as to face the coil (3) of the transformer (2).

In such a transformer device, unless the distance between the coil (3) of the transformer (2) and the metal plate (4) is too large, the magnetic force generated by the magnetic field generated from the coil (3) causes the metal plate to move. A vibration is applied to (14), and the vibration causes the metal plate to make a vibration sound, and an unpleasant sound is generated only by turning on the power of the device.

However, the conventional transformer device has no means for preventing the vibration caused by the coil of the transformer.

Therefore, conventionally, the distance L1 from the surface of the coil (3) to the metal plate (4) is increased to some extent to reduce the influence of the magnetic force exerted on the metal plate (4) to reduce the influence of the metal plate (4). I try to suppress the vibration.

[0006]

[Problems to be solved by the device]

 However, in order to prevent the vibration of the metal plate (4) as described above, it is necessary to considerably increase the distance L1 from the coil (3) of the transformer (2) to the metal plate (4). When L1 is increased, useless space is generated between the transformer (2) and the metal plate (4), and the device becomes large.

An object of the present invention is to solve the above problems, to provide a vibration isolator for a transformer device, which can reduce a wasted space between the transformer and a magnetic member in the vicinity thereof, and which can downsize the transformer device. To do.

[0008]

[Means for Solving the Problems]

 The vibration isolator of the transformer device according to the present invention has a magnetic force absorbing member made of a magnetic substance that absorbs the magnetic force generated from the transformer coil, disposed between the transformer and the magnetic member disposed in the vicinity thereof. Is.

[0009]

[Action]

 The magnetic force generated from the coil of the transformer is absorbed by the magnetic force absorbing member. Therefore, the magnetic force that affects the magnetic member is reduced, and even if the distance between the transformer and the magnetic member is reduced to some extent, the magnetic member does not vibrate.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS.

1 and 2 show a part of a transformer device provided with an anti-vibration device according to the present invention.

1 and 2, a coil (13) of a transformer (12) mounted on a printed wiring board (11) and a metal plate (14) as a magnetic member arranged so as to face the coil (13). A rectangular plate-shaped magnetic force absorption member (15) made of a magnetic material is disposed between The distance from the surface of the coil (13) to the metal plate (14) is the distance L2 from the surface of the coil (13) to the magnetic force absorbing member (15) and the distance from the magnetic force absorbing member (15) to the metal plate (14). The total of the distance L3 is (L2 + L3), which is smaller than the distance L1 in the conventional example of FIG.

As shown in FIG. 3, when a current flows through the coil (13) of the transformer (12), a magnetic field is generated around the coil (13), which produces a magnetic force, which affects the forward direction. Affect. Here, there are a case where a magnetic body (16) smaller than the surface area of the coil (13) is arranged in front of the coil (13) and a case where a magnetic body (17) larger than the surface area of the coil (13) is arranged. Then consider the effect of magnetic force. The magnetic force emitted from the coil (13) is absorbed by the magnetic substance, but in the case of the small magnetic substance (16), it cannot absorb all of it, and part of the magnetic force leaks forward and is further forward. Affects metal plates. On the other hand, in the case of the large magnetic body (17), most of the magnetic force can be absorbed, and the magnetic force hardly leaks forward. By the way, vibration is generated in the magnetic body by absorbing the magnetic force. For this reason, if the magnetic material is too large, its vibration will increase. Therefore, the size of the magnetic force absorbing member (15) in FIGS. 1 and 2 is preferably set to be slightly larger than the size of the surface of the coil (13). That is, it is made as small as possible within a range in which the surface of the coil (13) cannot be seen when the coil (13) side is viewed from the metal plate (14) side. For example, the outer peripheral edge of the magnetic force absorbing member (15) is positioned about 1 mm outside the outer peripheral edge of the surface of the coil (13). The smaller the distance L2 between the coil (13) and the magnetic force absorbing member (15), the better. However, since the coil (13) is vibrating by the magnetic force generated by itself and the magnetic force absorbing member (15) is also vibrating, when they come into contact with each other, the magnetic force absorbing member (15) moves to the coil (13). Vibration may cause resonance. Therefore, it is preferable that the distance L2 be as small as possible within a range in which the coil (13) and the magnetic force absorbing member (15) are not in contact with each other.

In the above transformer device, most of the magnetic force generated from the coil (13) of the transformer (12) is absorbed by the magnetic force absorbing member (15). Therefore, even if the distance L3 between the magnetic force absorbing member (15) and the metal plate (14) is reduced to some extent, the magnetic force does not affect the metal plate (14). Therefore, the distance (L2 + L3) from the coil (13) to the metal plate (14) can be made smaller than the conventional distance L1, resulting in a waste between the transformer (12) and the metal plate (14). Space is reduced, and the device can be downsized.

[0015]

[Effect of the device]

 According to the vibration isolator of the transformer device of the present invention, as described above, the magnetic force generated from the coil of the transformer is absorbed by the magnetic force absorbing member, so that the vibration of the magnetic member can be prevented, and the magnetic force of the transformer can be prevented. Even if the distance between the members is reduced, it is possible to prevent the magnetic member from vibrating. For this reason, it is possible to reduce the useless space between the transformer and the magnetic member and to downsize the transformer device.

[Brief description of drawings]

FIG. 1 is a partially cutaway schematic perspective view of a vibration isolator of a transformer device showing an embodiment of the present invention.

FIG. 2 is a schematic side view of a vibration isolator of the transformer device of FIG.

FIG. 3 is an explanatory diagram showing a magnetic field and a magnetic force around a coil of a transformer.

FIG. 4 is a schematic side view of a transformer device showing a conventional example.

[Explanation of symbols]

 (12) Transformer (13) Coil (14) Metal plate (magnetic member) (15) Magnetic force absorption member

Claims (1)

[Scope of utility model registration request] 1. A vibration isolator for a transformer device, wherein a magnetic force absorbing member made of a magnetic material that absorbs a magnetic force generated from a coil of the transformer is disposed between the transformer and a magnetic member disposed in the vicinity thereof.