JPH03253244A - Spring device for brush plate - Google Patents

Abstract

PURPOSE:To strengthen the fixation without increasing welding processes so as to improve reliability by providing either a brush plate spring or a connecting terminal with at least two or more minute projections. CONSTITUTION:For a connecting terminal 3, plural small projections 4a are provided at the fixing place with a brush plate spring 1, and by the spot welding of one time the brush plate spring 1 and the connecting terminal 3 are connected. This projection is the one where many small projections are formed like a star stamping press at the surface of the connecting terminal consisting of a conductive thin plate, and using the construction method such as the so- called star stamping press, etc., the flatness is secured making use of the extensive properties of the thin plate. Hereby, welding currents flow to all the projections 4a, and it can be welded over the wide area, and the fixation can be strengthened.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a brush plate spring device comprising a brush plate spring and a connecting terminal for a motor used in power windows, power seats, etc. of automobiles.

BACKGROUND OF THE INVENTION In recent years, the number of motors used in automobiles has been steadily increasing, and as a result, there has been a demand for smaller and lighter motors. Therefore, it is necessary to make the brush portion smaller and space-saving, and a leaf spring is used as the brush spring.

Hereinafter, a brush plate splashing device using a conventional leaf spring will be described with reference to the drawings.

FIG. 2 is a perspective view of a conventional brushing device. In FIG. 2, numeral 1 is a brush plate spring made of an elastic conductive material, and 2 is a brush which is held at one end of the brush plate f. 3 is a contact wc terminal made of a conductive material, 4 is a 1+ projection provided on the surface of the connection terminal 3, and the front = self-brush plate spring 1 and connection brush 3 are fixed by spot welding.・Brush plate spring 1 and connection terminal 3 configured as
To explain the fixation, the projection 4 provided on the surface of the connection terminal 3 is brought into contact with the fixing point M of the brush spring 1 and pressurized, and a large current is passed through the projection 4 by spot welding to heat and melt it. Then, the brush plate spring 1 and the connecting terminal 3 are welded together.

Problems to be Solved by the Invention However, in the above method, since the projection is formed on a thin plate, the projection is small and it is not possible to obtain a large fixing force. For this reason, when a brush plate spring fixed by welding is assembled into a motor, there is a problem in that if twisting force or tensile force is accidentally applied to the welded portion, the weld may peel off.

In view of the above problems, the present invention provides a highly reliable brush plate splash device in which the brush plate spring and the connection terminal are firmly fixed by one spot welding.

Means for Solving the Problems In order to solve the above problems, the brush plate splashing device of the present invention has the following features:
A plurality of projections whose flatness is ensured by a star press or the like is provided on either the brush plate spring or the connecting terminal, and the brush plate spring and the connecting terminal are fixed by spot welding.

By providing a large number of small projections, the size and height direction of the projections can be made uniform. In addition, when spot welding, when pressure is applied to the mating member, the tiny pointed head is pressed and all projections are securely in contact, so the welding current flows through all projections due to spot welding, and the welding current flows over a wide area. It can be welded to make the fixation stronger.

EXAMPLE Hereinafter, a brush plate IJ device according to an example of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a brush plate spring device according to an embodiment of the present invention.El is a brush plate spring, and 2 is a brush, which are the same as in the conventional example. Reference numeral 3 denotes a connection terminal, and a plurality of small projections 4a are installed at the part where the brush plate blade 1 is fixed, and the brush plate blade 1 and the connection terminal 3 are fixed by one spot welding. To explain the projections 4a in detail, a large number of small projections 4a are formed on the surface of the connection terminal 3 made of a single conductive plate like a star press. This ensures flatness by utilizing the ductility of the thin plate. In addition, since each of the plurality of projections 4a formed is minute, the brush plate splashes 3 during spot welding.
When the projections 4a are brought into contact with each other and pressurized, the pointed head of the projection 4a is easily deformed by pressure, and all the projections 4a are brought into contact with the brush plate spring 1 while keeping the surface of the connection terminal 3 and the surface of the brush plate spring 1 parallel. I am trying to make it possible for them to come in contact with each other.

Welding current flows through the plurality of projections 4a formed in this way, and welding can be performed over a wide area of the projections 4a, so that stronger fixation can be achieved.

In the explanation of this embodiment, the projection 4a is formed on the contact point 1, but this projection 4a is generally provided on one side of the member to be fixed, and the brush plate of the present invention is It goes without saying that in the case of a brushing device, a projection may also be provided on the brush plate. In addition, star pressing is a method used when pressing a metal plate to improve the flatness of the object to be pressed. , many square pyramidal recesses are formed on the surface of the metal plate, and the distortion of the metal plate can be removed.

Effects of the Invention As described above, the present invention provides reliable and improved fixing strength without increasing the welding process by providing at least two minute projections on either the brush plate spring or the connecting terminal. A high brushboard splash device can be provided.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a brush plate splashing device according to an embodiment of the present invention;
FIG. 2 is a perspective view of a conventional brush plate splashing device. 1...Brush plate spring, 2...Brush, 3.
...Connection terminal, 4...Projection.

Claims (1)

[Claims] A brush plate spring device in which a plurality of minute star-shaped projections are provided on either the brush plate spring or the connection terminal, and the brush plate spring and the connection terminal are fixed by spot welding.