JP2010232139A - Brush structure of slip ring - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a simple brush structure with good followability by aligning a plurality of brush pieces directly fitted at through-holes of a printed board. <P>SOLUTION: The brush structure of the slip ring is so structured that brush bodies (5) made by aligning a plurality of brush pieces (4) in the through-holes (2) of the printed board (1) are fixed to the printed board (1) by providing solder or an adhesive fitted inside the through-holes (2). <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a brush structure of a slip ring, and more particularly to a novel improvement for obtaining a brush body having a simple and good followability by arranging and arranging a plurality of brush pieces provided directly in a through hole of a printed circuit board.

  There are various types of brush structures of this type of slip ring that have been used in the past. For example, the configuration of Patent Document 1 can be cited, and the brush structure used in Patent Document 1 is illustrated by way of example in FIG. 4 and FIG. 5 were employed.

  That is, what is indicated by reference numeral 1 in FIG. 4 is a plate-like brush holder, and a pair of through holes 2 formed in the brush holder 1 are provided with spring members 3 whose overall shape is a U-shape. A pair of spring tongues 3a and 3b integrally formed at both ends of the spring member 3 penetrates the through holes 2 and protrudes downward.

Below the spring tongue pieces 3a and 3b, a plurality of brush pieces 4 made of wires are provided in an aligned state by welding or the like.
A brush body 5 is constituted by the spring tongue pieces 3 a and 3 b and the brush pieces 4.

  A lead wire 6 connected to a pattern (not shown) on the surface 1a of the printed board 1 is connected to the surface 1a of the brush holder 1, and the pattern connected to the lead wire 6 is the spring. It is connected to the member 3.

  Therefore, each brush piece 4 of each brush body 5 described above is brought into sliding contact with the peripheral surface of the rotor 7 of the slip ring from both sides as shown in FIG. Signal transmission can be performed.

JP 2009-43558 A

Since the conventional brush structure of the slip ring is configured as described above, the following problems exist.
That is, since the plurality of brush pieces 4 are connected to the tips of the spring tongues 3a and 3b of the spring member 3 made of a leaf spring, this connection is costly, making it difficult to reduce the manufacturing cost, and reducing the size. It was difficult.

Further, in order to reduce the size, both the spring member 3 and the brush piece 4 are configured to be short. When the spring member 3 and the brush piece 4 are shortened, the spring force of both the spring member 3 and the brush piece 4 is increased. The brush piece 4 must be used, and a great amount of labor is required for the connection between the spring tongue pieces 3a and 3b and the brush piece 4, and mass production is difficult.
Further, the connection structure between the spring tongue pieces 3a and 3b and the brush piece 4 is not sufficient in terms of reliability for space applications and the like.
Further, since the brush body 5 having the plurality of brush pieces 4 attached to the spring tongue pieces 3a and 3b of the spring member 3 must be attached to the brush holder 1, it takes a lot of labor to obtain the attachment accuracy. Cost reduction was difficult.

  The brush structure of the slip ring according to the present invention includes a plurality of through holes formed in a printed board, a plurality of brush bodies having brush pieces that pass through the through holes and protrude outward from the printed board, and the brush pieces. And a fixing member made of solder or adhesive for fixing the brush body to the through hole, and the brush pieces are aligned in parallel with each other. The horizontal direction of the L-shaped part is in contact with the surface of the printed board, and the longitudinal direction in which the brush bodies protrude from the printed board. Is a configuration in which a plurality of lead wires extending in the opposite direction are provided.

Since the brush structure of the slip ring according to the present invention is configured as described above, the following effects can be obtained.
A plurality of through holes formed in the printed circuit board; a plurality of brush bodies having brush pieces penetrating the through holes and projecting outward from the printed circuit board; and an L-shaped portion provided at a base of each brush piece And a fixing member made of solder or adhesive for fixing the brush body to the through hole, and the brush pieces are aligned in parallel with each other, thereby While obtaining a stable sliding contact, it is possible to reduce the size and produce a small amount, and it is easy to set the spring load of the brush.
Since the horizontal portion of the L-shaped portion is in contact with the surface of the printed board, each brush piece can be easily attached to the surface of the printed board.
The printed circuit board is provided with a plurality of lead wires extending in the direction opposite to the longitudinal direction in which each brush body protrudes, thereby facilitating transmission / reception of signals to / from each brush body.

It is a front view which shows the brush structure of the slip ring by this invention. It is a side view of FIG. FIG. 3 is an enlarged configuration diagram of a main part of FIG. 2. It is a front view which shows the brush structure of the conventional slip ring. FIG. 5 is a side view of FIG. 4.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a brush structure of a slip ring composed of a brush body that is simple and has good followability by arranging and arranging a plurality of brush pieces provided directly in a through hole of a printed circuit board.

Hereinafter, preferred embodiments of a brush structure of a slip ring according to the present invention will be described with reference to the drawings.
In addition, the same code | symbol is attached | subjected and demonstrated to a part the same as that of a prior art example, or an equivalent part.
In FIG. 1 and FIG. 2, what is indicated by reference numeral 1 is a printed board made of, for example, epoxy or glass epoxy, and a plurality of through holes 2 are formed in the printed board 1.

In each through hole 2, a brush body 5 having an overall L shape is inserted and fixed through a fixing member (not shown) made of solder or adhesive.
As shown in FIG. 1, the brush bodies 5 are juxtaposed in a state where a plurality of longitudinal brush pieces 4 are in contact with each other, and an upper portion (that is, a base portion) shown in the drawings of the brush pieces 4. Is formed with an L-shaped portion 10 bent into an L-shape, and the L-shaped portion 10 is formed with a horizontal portion 11 forming a horizontal shape. That is, the horizontal portion 11 is formed as a straight line orthogonal to the linear direction A from which the brush piece 4 projects.

In the state of FIG. 1, the brush body 5 has the brush pieces 4 arranged side by side, and in an aligned state in which the brush pieces 4 are juxtaposed with each other by a jig (not shown), a fixing member (made of solder or adhesive) is formed in the through hole 2. 1 is injected, the brush body 5 is fixed to the printed circuit board 1 in the state shown in FIG.
The horizontal portion 11 is positioned in contact with the surface 1a of the printed circuit board 1.

  The printed circuit board 1 is provided with lead wires 6 so as to extend in a direction opposite to the projecting direction in which the brush bodies 5 project. The lead wires 6 and the brush bodies 5 are horizontally arranged. For example, the part 11 is configured to be connected by a pattern (not shown) of the printed circuit board 1.

  As shown in FIG. 1, each of the lead wires 6 is located between the brush bodies 5 when viewed in the longitudinal direction B of the printed circuit board 1 and is short of the printed circuit board 1 as shown in FIG. When viewed in the hand direction C, a pair of the brush bodies 5 are disposed on both ends of the short direction C, and the lead wires 6 are positioned between the brush bodies 5.

  Accordingly, as shown in FIG. 2, the brush structure 5 of FIG. 1 and FIG. 2 described above can contact the outer periphery of the rotor 7 with elasticity and form the slip ring 21. .

  The brush structure of the slip ring according to the present invention can be applied not only to the slip ring but also to the brush structure of a motor.

DESCRIPTION OF SYMBOLS 1 Printed circuit board 1a Surface 2 Through hole 4 Brush piece 5 Brush body 6 Lead wire 7 Rotor 10 L-shaped part 11 Horizontal part 20 Brush structure 21 Slip ring

Claims (3)

A plurality of brush bodies (2) having a plurality of through holes (2) formed in the printed circuit board (1) and brush pieces (4) penetrating the through holes (2) and projecting from the printed circuit board (1) to the outside ( 5), an L-shaped part (10) provided at the base of each brush piece (4), and a solder or an adhesive for fixing the brush body (5) to the through hole (2) A fixing member comprising:
The brush structure of a slip ring, wherein the brush pieces (4) are aligned in parallel with each other.   The brush structure of the slip ring according to claim 1, wherein the horizontal portion (11) of the L-shaped portion (10) is in contact with the surface (1a) of the printed circuit board (1).   The printed circuit board (1) is provided with a plurality of lead wires (6) extending along a direction opposite to the longitudinal direction (A) from which the brush bodies (5) protrude. The brush structure of a slip ring according to claim 1 or 2.

Images