JPS6122749A - Linear vibration actuator - Google Patents

Abstract

PURPOSE:To enhance the performance and the service life of an actuator by transmitting heat generated at the primary side from a yoke to a partition plate and a heat sink plate, and supporting the primary side and the secondary side through a friction reducing member and a wear resistant member. CONSTITUTION:When currents are supplied alternately to the first and second coils 7, 11 at the primary side, the secondary side rod 27 reciprocates along the primary side wear reducing member 23 in lateral directions. In this case, the heats generated at the first and second coils 7, 11 of the primary side 3 are transmitted from yokes 9, 13 to a partition plate 17, and dissipated from fins of a heat sink plate 15 into the atmosphere. The center of the rod 27 is directly slid with the member 23, but since the both end sides of the rod 27 are slid through the member 23 and a wear resistant member 19 provided at the rod 27, the wears of the both ends decrease.

Description

DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application This invention relates to a linear vibration actuator (two-handed 1-OA
(abbreviated as ), and more specifically, it relates to the support and heat dissipation structure of the secondary core 1-OA.

b. Conventional technology The quadratic iron core 10A has a small number of parts and a simple structure, so it has recently been used in coal washing sieves, near compressors, actuators for refrigerators, etc.

The structure of a secondary iron core LOA is that a rod-shaped iron core (rod) is placed on the inner circumference of a cylindrical yoke containing two annular coils, and a cylindrical spacer made of a non-magnetic material, such as brass. The rod is supported through the two coils, and the rod performs reciprocating motion by passing current alternately through the two coils. The spacer serves to balance the radial attraction forces between the yoke and the rod, prevent them from coming into contact with each other, and guide the reciprocating movement of the rod in the axial direction.

C0 Problems to be Solved by the Invention The rod support structure of the iron-core quadratic LOA uses a non-magnetic brass cylindrical spacer as described above, but as wear progresses, the rod becomes eccentric. This disturbs the balance of radial forces, increases frictional force, accelerates wear, and adversely affects dynamic characteristics. Therefore, it is necessary to use a material with low friction for the spacer and a material with high wear resistance for the rod. In addition, the yoke and the rod are generally made of soft iron and the gap in the magnetic circuit is large, so the current supplied to the primary side is relatively large and generates a lot of heat. Therefore, 1
Proactive measures are required for heat dissipation on the next side. Also,
In the conventional LOA, part of the magnetic flux of the coil on the excitation side leaks to the yoke on the non-excitation side, which tends to result in a low 11E force.

The object of this invention is to improve the problems mentioned above and to provide a high-performance, long-life iron core secondary side 1-0.DELTA.

Means for solving and overcoming the d1 problem In order to achieve the above-mentioned object, the present invention first provides a 14th and a 2nd isol, each incorporating a 1st and a 2nd isle, respectively.
A primary side consisting of a partition plate made of a non-magnetic material with a heat dissipation plate installed between the 4-rings, and a rad made of a magnetic material provided on the inner circumference 1J of the primary side. The secondary side is made of a non-magnetic material provided at the m-pole part of the primary side, and is provided at both ends of the secondary side lot. The gist of the configuration is that the tank is provided to be freely movable via the wear-resistant portion 4A.

01 Effect Since the structure is as described above, the heat generated on the primary side is transferred from the yoke to the heat wave 3. ``;l The heat is transmitted to the high S$ partition plate and heat sink and dissipated into the atmosphere, so the primary side is kept at a lower temperature and there is less deformation of the yoke.
Since the next side and the secondary side are supported through anti-friction parts')'A and wear-resistant members, there is less frictional wear on the sliding parts between them, and therefore the performance of the motor is improved to the next level. and has a longer lifespan.

f. Example Next, an example of the present invention will be described based on the drawings. FIG. 1 shows an embodiment of the present invention, in which a cylindrical linear vibration actuator 1 consists of a primary side 3 and a secondary side 5. The primary side 3 includes a first yoke 9 made of soft iron with a built-in first coil 7 and a second yoke made of soft iron with a built-in second coil 11.
Between the yokes 13, an aluminum finned heat sink 1 is installed.
A partition plate 17 made of aluminum with 5 and 5 (M) is inserted and connected to the connecting poles 1 to 19.

York 9. ′+:] At the magnetic pole part, an anti-friction member 23 such as an A-illess bearing is attached to a metal fitting 25! 'S (KJ 14) 1, secondary side 5 is made of soft iron [
From 27 to 4", a non-111'+ material such as a ceramic material is attached to the part that is inscribed in the anti-friction member 23 of the primary side 3 and corresponds to the outer magnetic pole of the primary side 3). A page wear department has been established for 29 months.

The first yoke 9 and the 23rd yoke 13 of the primary side 3 are divided into two parts at the left end and right end in the drawing, respectively, in order to accommodate the coil, and the connecting pole 1-31 has J and J. Although they are connected in one direction, the divided portion of the yoke may be placed on the partition plate 17 side, and the connection of the divided yokes and the connection with the partition plate may be performed by the connection ports 1 to 19.

Since the configuration is as follows, when current is alternately supplied to the first coil 7 and the second coil 11 on the primary side,
The secondary rod 27 returns along the primary anti-friction member 23 in the left-right direction in the drawing. In this case, the first .
The heat generated in the second coil is transmitted from the yokes 9 and 13 to the partition plate 17 and is radiated from the fins of the heat sink 15. Further, the central part of the rod directly slides on the primary anti-friction part 23, but both ends of the rod slide directly on the primary anti-friction part 23.
23 and the wear-resistant portion 29 provided on the rod, the wear on both ends is significantly reduced.

Incidentally, this invention can be implemented in aspects other than the embodiments.

Q1 Effects of the Invention As understood from the above explanation, the present invention has the structure set forth in the claims, so it is possible to create a near-vibration actuator with a quadratic iron core that has high performance and long life. can be shared.

[Brief explanation of drawings]

FIG. 1 is a half-sectional view of a cylindrical linear vibration actuator according to an embodiment of the present invention. Explanation of symbols representing main parts in the drawings 1...Linear vibration acticoator 3...Primary side 5...Secondary side 7...First
Coil 9...First yoke 11...Second coil 13...Second yoke 15...Radiation plate 1
7... Partition plate 19... Connection holt 21... Connection port 1 to 23... Anti-friction member 27... Rod 29... Resistance [ff wear part +2

Claims (1)

[Claims] A primary side comprising a non-magnetic partition plate provided with a heat sink between a first yoke and a second yoke each containing a first coil and a second coil, and an inner peripheral portion of the primary side. A secondary side consisting of a magnetic rod provided on the primary side is connected to a non-magnetic anti-friction member provided on the magnetic pole portion of the primary side, and a non-magnetic anti-friction member provided on both ends of the secondary side rod. Through wear-resistant parts,
A linear vibration actuator characterized by being slidably provided.