JP2619525B2 - Brush material for sliding - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a sliding brush material.

(Prior art) In recent years, with the development of electronic devices, high reliability is required for the contact parts, and sliding parts used in trimmers, potentiometers, encoders, slip rings, and many other contact mechanisms are required. For brushes, in order to enhance the reliability, a brush for sliding is formed by welding a bundle of a number of ultrafine wires having a wire diameter of 10 μm aligned and focused on a base material, that is, multipoint contact at point or surface contact. By doing
There are brushes that increase the stability of the contact.

Conventionally, as shown in FIG. 5, one of the sliding brush materials is formed by welding a wire bundle 5 in which a large number of ultrafine wires 4 are aligned and bundled to each of the ridges 3 of a ladder-shaped strip base material 2 having a window hole 1. There was a moving brush material 6.

(Problems to be Solved by the Invention) By the way, the following problems were encountered in processing and molding the above-mentioned sliding brush material to obtain the sliding brush 7 as shown in FIG.

That is, in order to respond to the needs of the recent market and efficiently produce low-priced, high-quality (precision) sliding brushes, it is necessary to use a wire bundle as shown in FIGS. Cutting, brush tip R forming, brush half bending forming,
Continuous work of brush final bending and cutting of product (base material) is required.

Of these, the wire bundle cutting requires a space for the bending piece to enter when forming the brush tip R in the next step, and the ladder-shaped ridge 3 is in the way. Indispensable for providing space between them. The wire bundle cut here is separated into wires one by one, and is collected in the mold. However, since the wire remains in the progressive die (raises up), brush deformation and scratches may occur. I was

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a sliding brush material that can efficiently produce a sliding brush having no brush deformation or scratches.

(Means for Solving the Problems) The sliding brush material of the present invention for solving the above problems has a structure in which at least one side edge of the band-shaped base material with a window hole is left and is parallel to the vicinity of each of the members of the window hole. In this case, a wire bundle obtained by aligning and consolidating a large number of ultrafine wires is welded to the ridge portion and the auxiliary ridge portion of the band-shaped base member.

(Operation) The sliding brush material of the present invention having the above-described configuration is cut by cutting the wire bundle at the rear edge of the auxiliary member and the rear edge of the member when cutting the wire bundle in the progressive die. The wire bundle is collected without being separated from the wires one by one and integrated with the auxiliary member. Therefore, unlike the related art, the wire does not remain (raise) in the progressive die, and there is no brush deformation or scratch.

(Embodiment) An embodiment of the sliding brush material of the present invention will be described with reference to the drawings. As shown in FIG. 1, the width is 12 mm, the thickness is 0.2 mm, and the length is 8 m.
m, width of 30% Cu-Ni strip 2 with window 1 of 8mm width
Auxiliary ridges 8 having a width of 0.6 mm are provided in the vicinity of each of the ridges 3 having a width of 0.8 mm at intervals of 0.8 mm. Pd35% -Pt10% -Au10% -Cu
A wire bundle 5 in which 32 ultrafine wires 4 of 14% -Zn1% and having a wire diameter of 70 [mu] m are aligned and focused is welded to form a sliding brush material 6 '.

The sliding brush material 6 'is cut in a progressive die as shown in FIGS.
Continuous operations of brush half-bend forming, brush final bend forming, and product (base material) cutting were performed to obtain 100 sliding brushes 7 shown in FIG.

On the other hand, as a conventional example, as shown in FIGS. 6A and 6B, a sliding brush material 6 having the same material, the same dimensions and the same shape as the embodiment having no auxiliary support portion 8 as shown in FIG. Cutting, brush tip R forming, brush half bending forming,
Continuous operations of final bending of the brush and cutting of the product (base material) were performed to obtain 100 sliding brushes 7 shown in FIG.

Each of the sliding brushes of the embodiment and the conventional example thus obtained was 100
A quality inspection of the individual pieces showed that there were 14 defective articles with deformation, dents and scratches in the conventional sliding brush, but none in the sliding brush of the embodiment. there were.

In addition, in the sliding brush material 6 'of the embodiment, the wire bundle 5 is a single wire, but may be two, three, or a plurality of wire bundles. Further, in welding the wire bundle 5 to the ridge portion 3 of the band-shaped base member 2, one or a plurality of projections may be provided on the ridge portion 3 and the wire bundle 5 may be subjected to projection welding. Further, the belt-like base material 2 of the sliding brush material 6 'of the present invention.
Is not limited to a ladder shape with a window hole 1, but as shown in FIG. 4, one side edge of the window hole 1 is left, and a ridge portion 3 and an auxiliary ridge that project at right angles to the side of the one side edge. The one provided with the part 8 may be used.

(Effects of the Invention) As can be seen from the above description, according to the sliding brush material of the present invention, there is an effect that a sliding brush free of brush deformation and scratches can be efficiently produced.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a sliding brush material of the present invention, and FIGS. 2a and 2b are a plan view and a side view showing a process of manufacturing a sliding brush from the sliding brush material, and FIG. Is a perspective view of a sliding brush, FIG. 4 is a plan view showing another embodiment of the sliding brush material of the present invention, FIG. 5 is a plan view showing another embodiment of the conventional sliding brush material, FIG. 6 (a) and (b) are a plan view and a side view showing a process for producing a sliding brush from the sliding brush material.

Claims (1)

(57) [Claims] 1. An auxiliary member is provided in parallel with each of the window holes while leaving at least one side edge of the window-shaped base member with windows.
A sliding brush material, wherein a wire bundle obtained by aligning and consolidating a large number of ultrafine wires is welded to the ridge portion and the auxiliary ridge portion of the band-shaped base material.