JPH11127552A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a motor in which the inside of a case body can be protected sufficiently, while enhancing the appearance by preventing the inside of the case body from being exposed through a cut made in the case body in order to pass the terminal block of a coil unit and in which undue tension which causes breakage of an exciting coil can be prevented from being applied by surely positioning the terminal block and the terminal. SOLUTION: A plate 12 fixed to a case body 11 is provided with a cover part 12A for covering a cut 11A made in the case body 11, in order to pass a terminal block 21A of a coil unit 20. Furthermore, a plate 30 for positioning the terminal block 21A or a terminal 23 is held between a first protruding part 12B on the cover part 12A side and a second protruding part 11B on the case body 11 side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a cylindrical bobbin having a coil unit formed by winding an exciting coil for driving a rotor magnet around the outer periphery of the cylindrical bobbin. The present invention relates to a motor in which a plate is attached to an opening at one end of the case body.

[0002]

2. Description of the Related Art Conventionally, as a motor of this kind, FIGS.
A stepping motor as shown in FIG. 6 is known.
A case 10 of this motor includes a bottomed cylindrical case body 11 and a plate 1 for closing an opening on the left side in FIG.
2 and the case body 1
After the coil unit 20 is inserted into the opening 1 through the opening, the plate 12 is attached to the opening by means such as welding. Here, as shown in FIGS. 5 and 6, the coil unit 20 has a configuration in which an excitation coil 22 for driving the rotor magnet 1 is wound around a cylindrical bobbin 21.

A terminal block 21 projecting outward from the case body 11 is provided at an intermediate position in the longitudinal direction of the bobbin 21.
A is formed, and a terminal 23 is implanted on the terminal block 21A. As shown in FIG. 6, an end of the exciting coil 22 is connected to the terminal 23, and the exciting coil 22 is connected to an external drive circuit through the terminal 23. In this motor, a two-phase stepping motor in which two exciting coils 22 are wound is used.
3 are planted in total so as to correspond to those exciting coils 22. Further, on the peripheral wall of the case body 11,
A cutout 11A is formed from the opening along the longitudinal direction of the case main body 11, and when the coil unit 20 is inserted into the case main body 11, the terminal block 21A passes through the cutout 11A. It will enter almost the middle position of the case body 11. Reference numeral 2 in the drawing indicates a shaft of the motor.

[0004]

In the above-mentioned conventional motor, as shown in FIGS. 4 and 5, the coil unit 20 is attached to the case body 11 so that the length of the case body 11 is about 1/2 of the total length. Since it is necessary to form the notch 11A through which the terminal block 21A is inserted when inserted into the inside, the notch 11A near the opening of the case main body 11 remains open after assembly. I will. For this reason, there is a possibility that the inside of the case main body 11 may be exposed through the notch portion 11A and foreign matter may enter, so that the exciting coil 22 of the coil unit 20 and the like cannot be sufficiently protected, and the appearance also deteriorates. there were. Further, the terminal block 21A is not restricted by the case body 11 on its left side surface in FIG. Therefore, there is a possibility that the end of the exciting coil 22 connected with relatively high tension may be cut off.

The present invention has been made to effectively solve the problems of the conventional motor described above, and the inside of the case main body is cut out from a cutout portion of the case main body formed to pass the terminal block of the coil unit during assembly. It is an object of the present invention to provide a motor capable of avoiding exposure and sufficiently protecting the inside of a case body and improving the appearance. Another object of the present invention is to provide a motor capable of reliably positioning the terminal block and the terminal and avoiding the application of excessive tension which may cause the excitation coil to be cut. is there.

[0006]

According to the present invention, there is provided a motor according to the present invention, wherein a coil unit in which an exciting coil for driving a rotor magnet is wound around a cylindrical bobbin has one end of a cylindrical case body. A terminal block provided at an intermediate position in the longitudinal direction of the bobbin and protruding outward from the case body in a motor in which a plate is attached to one end side opening of the case body after being inserted into the case body through the side opening. And a terminal that is implanted in the terminal block and to which an end of the excitation coil is connected, and that the peripheral wall of the case main body is cut out along the longitudinal direction of the case main body from the one end side opening. A notch portion for passing the terminal block, and a cover portion provided on the plate and covering the notch portion are provided.

Here, the invention according to claim 2 is characterized in that the cover portion is provided with a first projecting portion projecting radially outward of the case main body, and a radial wall of the case main body is provided on a peripheral wall of the case main body. A second projection protruding outward is provided, and a positioning plate for positioning the terminal block is held between the first and second projections. On the other hand, the invention according to claim 3 provides the cover portion with a first protruding portion protruding radially outward of the case main body, and protruding on the peripheral wall of the case main body radially outward of the case main body. A second protruding portion, and an electrically insulating positioning plate for positioning the terminal between the first and second protruding portions is held.

[0008] In the motor according to any one of the first to third aspects, the plate attached to the case main body is provided with a cover portion for covering a cutout portion formed in the case main body for passing the terminal block of the coil unit. Thus, it is possible to prevent the inside of the case main body from being exposed through the cutout portion, and to sufficiently protect the inside of the case main body and improve the appearance. In this case, in particular, according to the invention described in claim 2 or 3, the terminal block or the terminal is positioned between the first protrusion on the cover portion side and the second protrusion on the case body side. By holding the positioning plate, it is possible to reliably position the terminal block or the terminal and to avoid applying an excessive tension which may cause the cutting of the exciting coil.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. (First Embodiment) FIGS. 1 and 2 show a first embodiment of the present invention.
In this embodiment, the same components as those of the conventional one shown in FIGS. 4 to 6 are denoted by the same reference numerals, and description thereof is omitted. As shown in FIGS. 1 and 2, in this motor, a cover 12A extending along a notch 12A from the periphery of the plate 12 is bent and formed on the plate 12, and the cover 12A The notch 12A near the opening of the main body 11 is covered. Further, a first protruding portion 12B that protrudes outward in the radial direction of the case main body 11 is bent at the tip of the cover portion 12A.

The case main body 11 is formed with a second protruding portion 11B that protrudes radially outward. The second projecting portion 11B is formed by cutting and raising a peripheral wall portion of the case body 11 to be cut out to form the cutout portion 11A. These first,
The second protruding portions 12B and 11B are in a positional relationship to face each other across the terminal block 21A. Projection parts 12B, 11B
The positioning plate 30 is held between the tips of the two. On both sides of the positioning plate 30, the protrusions 1
Engaging portions 31, 31 for engaging with step portions at the tips of 2B, 11B are formed. Further, the positioning plate 30 is formed with a positioning hole 32 that fits into the terminal block 21A.

Next, the operation of the motor having the above configuration will be described. First, when assembling the motor, the coil unit 20 is inserted into the case main body 11 from the opening thereof and the terminal block 21A is inserted into the case main body 11 through the notch 11A substantially in the same manner as in the conventional example described above. Into position. Then, the case body 1
The plate 12 is attached to the opening 1 by welding or other means. By attaching the plate 12, the cover 12A covers the cutout 11A near the opening of the case body 11. Next, the positioning plate 30 is engaged and held between the distal ends of the first and second protrusions 12B and 11B, and the positioning holes 32 of the positioning plate 30 are fitted to the terminal block 21A.

In the motor thus assembled, the notch 11A near the opening of the case body 11 is covered by the cover 12A, so that the inside of the case body 11 is not exposed through the notch 11A. . Therefore, the exciting coil 22 of the coil unit 20 and the like can be sufficiently protected, and the appearance is improved. Further, the terminal block 21A is positioned by the positioning plate 30 held between the first and second protrusions 12B, 11B, and as a result, an external force received when the terminal 23 is connected to the external connector is connected. Terminal block 21
A does not fluctuate, and the application of an excessive tension that may cause the excitation coil 22 to be cut is prevented.

(Second Embodiment) FIG. 3 is for explaining a second embodiment of the present invention. In this motor, the positioning plate 30 is formed of an electrically insulating material, and further, a positioning hole 33 that fits into the terminal 23 is formed. Therefore, according to this motor, the terminal 23 is positioned by the positioning hole 33, and as a result, the terminal 23 is subjected to an external force or the like when the terminal 23 is connected to the external connector.
Does not fluctuate, and it is possible to avoid applying an excessive tension which may cause the excitation coil 22 to be cut.

[0014]

As described above, according to any one of the first to third aspects of the present invention, the terminal body of the coil unit is formed on the plate attached to the case body so as to pass the terminal block of the coil unit. Since the cover is provided to cover the cutout, the inside of the case main body is prevented from being exposed through the cutout, and the inside of the case main body can be sufficiently protected and the appearance can be improved. According to the second aspect of the present invention, the positioning plate for positioning the terminal block is held between the first projection on the cover and the second projection on the case body. According to the third aspect of the present invention, it is possible to prevent the excessive tension acting on the terminal block so as to cause the cutting of the exciting coil. By holding a positioning plate for positioning the terminal between the first protruding portion and the second protruding portion on the case body side, the terminal is reliably positioned and the exciting coil can be cut. An effect is obtained that it is possible to avoid applying an excessively large tension.

[Brief description of the drawings]

FIG. 1 is a partially exploded perspective view for explaining a first embodiment of the present invention.

FIG. 2 is a partially sectional side view of the motor of FIG. 1;

FIG. 3 is a side view for explaining a second embodiment of the present invention.

FIG. 4 is a perspective view showing a conventional motor.

FIG. 5 is a side view of the motor shown in FIG.

FIG. 6 is a sectional view of a coil unit provided in the motor of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotor magnet 2 Shaft 10 Case 11 Case main body 11A Notch 11B 2nd protrusion 12 Plate 12A Cover 12B 1st protrusion 20 Coil unit 21 Bobbin 21A Terminal block 22 Exciting coil 23 Terminal 30 Positioning plate 31 Engagement Part 32, 33 Positioning hole

Claims (3)

[Claims] 1. A coil unit in which an exciting coil for driving a rotor magnet is wound around an outer periphery of a cylindrical bobbin is inserted into one end of an opening of a cylindrical case main body, and then is inserted into one end of the case main body. In a motor having a plate attached to an opening, a terminal block provided at an intermediate position in a longitudinal direction of the bobbin and protruding outward from the case body, and an end of the excitation coil implanted in the terminal block and A terminal to be connected; a notch in a peripheral wall of the case main body cut out along the longitudinal direction of the case main body from the one end side opening to pass the terminal block; and the cutout provided in the plate. A motor comprising: a cover that covers a notch; 2. A cover according to claim 1, wherein said cover has a first protrusion protruding radially outward of said case main body, and a second protrusion protruding radially outward of said case main body on a peripheral wall of said case main body. The motor according to claim 1, wherein a portion is provided, and a positioning plate for positioning the terminal block is held between the first and second projecting portions. 3. A first projecting portion projecting radially outward of the case body is provided on the cover portion, and a second projecting projecting radially outward of the case body is formed on a peripheral wall of the case body. 2. The motor according to claim 1, wherein a protrusion is provided, and an electrically insulating positioning plate for positioning the terminal is held between the first and second protrusions.