JPH0550695U - Slip ring - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a slip ring having a simple structure in which each part can be easily processed. [Structure] The slip ring of the present invention is a combination of a conductor ring and an insulating ring in which one metal piece of a T-shaped metal plate is formed into a circular shape to form a conductor portion and the other metal piece has a terminal portion provided with a step portion. It is easy to process parts, especially conductor rings.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a slip ring used in a power feeding portion to a coil of a small pump driven by magnetic coupling between a coil and a magnet.

[0002]

[Prior Art]

 Magnetic coupling between a coil and a magnet is used in the drive part of a small pump. Generally, expensive components such as ICs and Hall elements are used for such a driving unit.

The applicant has developed a small pump that uses an inexpensive commutator for the power supply portion of the drive unit. It has a structure as shown in FIGS. In these drawings, 21 is a case, 22 is a partition plate, 23 is an impeller, 24 is an impeller rotating shaft, 25 is a magnet, 26 is a lower case, 27 is a coil arranged in the lower case, and 28 is a lower case 26. Inside is an auxiliary magnet supported by the rotating shaft 29, 30 is a commutator fixed to the rotating shaft 29, 31 is a slip ring, 32 is a feeding brush, and 33 is a receiving brush.

FIG. 9 shows the connection for feeding power to the coil 17 through the commutator. In FIG. 9, the current supplied from the power supply brush 32a is supplied to, for example, 30a of the commutator 30, the slip ring 30a, the 33a of the power receiving brush 33, and the coil 17a. It flows through the brush 33b, the slip ring 31b, the commutator 30b, and the brush 32b.

In this way, the coil 17 is energized and the magnet is rotated.

The rotation of the magnet also rotates the commutator to switch the contact between the divided commutator and the brush, and the same energization is repeated to operate the pump.

[0007]

[Problems to be solved by the device]

 The slip ring 31 as described above has three lines on the plane, and the outermost line has a large warp, resulting in a large friction loss and a defect that it is difficult to obtain surface wobbling accuracy.

Although a slip ring as shown in FIGS. 10 to 12 is also known, each ring 41 is formed by cutting, and the lead wire 42 is connected to the ring by brazing. It has drawbacks that it is troublesome to process and is expensive because the material is a conductor such as silver.

An object of the present invention is to provide a comparatively inexpensive slip ring which has no problems such as friction loss and surface wobbling, has a simple structure, and is easy to process.

[0010]

[Means for Solving the Problems]

 In the slip ring of the present invention, a T-shaped metal plate is formed into a conductor by bending one metal piece into a circle so that both ends of the metal piece are close to each other, and the other metal piece forms a step portion and the conductor portion is formed. It is formed by combining a conductor ring, which is bent at the root so that it extends parallel to the line passing through the center of the circle, to form a terminal part, and a circular insulating ring made of insulating material. The conductor rings are arranged such that the insulating rings are sandwiched between each other, and the terminal portions of the respective conductor rings are located inside the insulating ring. Therefore, the conductor ring is formed by pressing a metal plate into a ring shape as described above and combining a plurality of these through an insulating ring.

Further, the slip ring of the present invention may have a structure in which the commutator is integrated so as to form a circular shape when the width of the terminal portion of the conductor ring is widened and is assembled in an arc shape.

[0012]

【Example】

 Next, an embodiment of the slip ring of the present invention will be described with reference to the drawings.

1 and 2 are views showing a first embodiment of a slip ring of the present invention, FIG. 1 is a side view thereof, and FIG. 2 is an exploded perspective view thereof.

In these drawings, 1 is an insulating core, 2 is a conductor ring in which a circular conductor portion 3 and a terminal portion (lead wire) 4 are integrally formed, 5 is a circular insulating ring, and 6 is a fixed member. It is a ring. To assemble as shown in FIG. 1, the first conductor ring 2 (the leftmost ring in the figure) is first attached to the core 1a portion of the insulating core 1 as shown in FIG. The conductor ring 2 is inserted until the step portion 4a of the terminal portion 4 comes into contact with 1b. Subsequently, the first insulating ring 5 is inserted so that the terminal portion 4 is located inside the first insulating ring 5, and the second conductor ring 2 is inserted so as to be located outside the insulating ring 5. Similarly, the second insulating ring 5 is inserted, the third conductor ring 2 is inserted, and then the fixing ring 6 is used for fixing.

Here, the respective terminal portions 4 of the first conductor ring, the second conductor ring, and the third conductor ring are arranged so as to be displaced in the circumferential direction of the ring so as not to contact each other. I am doing it. In this way, the combined slip ring is constructed as shown in FIG.

The conductor ring 2 can be easily manufactured as follows. That is, a metal plate punched out in a T-shape as shown in FIG. 3 is formed into a circular shape in the portion forming the conductor portion 3 and the portion forming the terminal portion 4 is bent to form a step portion 4a. A conductor ring is formed as shown in.

The metal plate having the shape shown in FIG. 3 can be easily processed by punching with a press machine, or when the metal plate is machined as shown in FIGS.

The material of the conductor ring may be a metal plate such as brass provided with a rectifying material clad on the conductor portion. In other words, a metal plate provided with a rectifying material on the portion corresponding to the conductor may be rolled into a plate shape, and this may be punched out to form as shown in FIG. Further, it is preferable that the width of the terminal portion is narrower because the conductor ring can be easily pressed.

6 and 7 are views showing a second embodiment of the present invention. This embodiment is a slip ring in which a commutator is integrally combined. That is, in FIG. 6, the left side 10 is a slip ring, and the right side 11 is a commutator.

The structure of this embodiment will be described in more detail. FIG. 7 shows a conductor ring 2, and its terminal portion 6 is provided with two plates having a width obtained by dividing a substantially circular shape into six parts, and each plate is formed by pressing. The shape is an arc. The conductor rings 2 shown in FIG. 7 are combined in the same manner as in the first embodiment, and the terminal portions 6 of the conductor rings 2 are separated by a minute distance as shown in FIG. 6B. By arranging them side by side in a circular shape, a 6-pole commutator is formed.

In this embodiment, since the width of the terminal portion 6 has to be relatively wide, it is relatively difficult to work by pressing. Therefore, if the width of the root portion of the terminal portion 6, that is, the portion that is bent to form the step portion is narrowed, the commutator-forming portions of each terminal portion can be wide and adjacent to each other to form a circular shape. The narrow width makes the work easier.

In the illustrated embodiment, one conductor ring is provided with two terminal portions. However, for example, a structure in which only one terminal portion having a wider width is provided is combined to form a circular shape as a whole. The structure may be such that they are arranged side by side.

[0023]

[Effect of the device]

 The slip ring of the present invention has no problems such as friction loss and surface wobbling, and can be easily assembled and processed at low cost.

[Brief description of drawings]

FIG. 1 is a side view of the first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the first embodiment of the present invention.

FIG. 3 is a view showing a shape of a conductor ring according to the first embodiment of the present invention before being processed.

FIG. 4 is a perspective view of a conductor ring according to a first embodiment of the present invention.

FIG. 5 is a side view of the first embodiment of the present invention.

FIG. 6 is a view showing a conductor ring according to a second embodiment of the present invention.

FIG. 7 is a view showing an assembled state of the second embodiment of the present invention.

FIG. 8: Small pump driven by magnetic coupling

FIG. 9: Slip ring used in the above pump

FIG. 10 is a perspective view of a ring portion of a conventional slip ring.

FIG. 11 is a sectional view showing a part of an assembled state of the conventional slip ring.

FIG. 12 is a perspective view of the conventional slip ring in the assembled state.

[Explanation of symbols]

 2 conductor ring 3 conductor part 4 terminal part 5 insulating ring

Claims (3)

[Scope of utility model registration request] 1. A metal piece of a T-shaped metal plate is bent into a circle so that both ends thereof are close to each other to form a conductor portion and another metal piece forms a step portion, and the center of the circle is formed. A conductor ring bent to extend parallel to a line through which a terminal portion is formed, and a circular insulating ring formed of an insulating material. Slip rings that are arranged side by side so that they are located inside the insulating ring. 2. The slip ring according to claim 1, wherein the terminal portions of the conductor rings are curved in an arc shape and are arranged adjacent to each other in a circular shape as a whole. 3. Each conductor ring has two terminal portions that are curved and curved in a circular arc shape and are located opposite to each other, and the terminal portions are arranged adjacent to each other in a circular shape as a whole. Item 1 slip ring.