JPH0937509A - Motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the size of an electric machine by a method wherein a connector is attached to a housing in such a manner that the connecting direction of the connector is perpendicular to the axis of the output shaft of a rotor. SOLUTION: A connector 7 is integrally attached to the outer circumferential wall of a housing 2 by covering the connector 7 with a covering unit 7a which is fixed to the housing 2. The connector 7 has an approximately square mating hole 8 by which the connector 7 is mated with an external connector 10 for connection. A plurality of contact pins 9 which are connected to coil windings wound on a stator 3 are provided on the bottom wall 8a of the mating hole 8. Guide trenches 8b are formed in the upper and lower inside walls of the mating hole 8. The connector 7 is attached to the housing 2 in such a manner that the mating direction of the mating hole 8, i.e., the direction in which the external connector 10 is inserted, is in the circumferential direction of the housing 2 which is perpendicular to the axial direction of the output shaft 4a of the rotor 4 of a motor 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stepping motor used in office automation equipment, household electric equipment and the like.

[0002]

2. Description of the Related Art Recently, office automation equipment,
Various small motors such as stepping motors are used in many electric appliances such as household electric appliances. With the demand for miniaturization of these electric devices, miniaturization of each component is in progress, and it is required to miniaturize or reduce the installation space of one of these components, the motor. There is. In addition, some of these motors have a type in which a connector is provided integrally with the motor housing.In this type of motor, the size of the motor including this connector is reduced and the installation space when it is attached to electrical equipment. Has been reduced, that is, space saving has been achieved, and as a result, it has contributed to miniaturization of electric equipment. As a conventional miniaturization of these motors including this connector, there is one configured as shown in FIG. That is, as shown in the figure, the cover body 1 is attached to the outer peripheral wall of the housing 101 of the motor body 100.
In order to reduce the outer diameter of the motor main body 100 including the outer peripheral portion of the connector 102 in the circumferential direction, the connecting portion of the connector 102, that is, the connection port 103 is covered. The housing 10 is arranged along the axial direction of the drive shaft 104 of the motor body 100.
It is configured to be attached to 1. Then, the external connector 105, which is the connected connector to which the lead wire 105a is connected, is inserted into the connection port 103 of the connector 102 for connection.

However, in the case of the above structure,
Motor main body 100 including the outer peripheral portion of the connector 102
Although the outer diameter in the circumferential direction can be reduced, the end portion of the external connector 105 on the lead wire lead-out side and the lead wire 105a project outward from the end surface of the housing 101, that is, the lower surface in the drawing. However, there is a problem that a space for arranging the end portion of the connector 105 and the lead wire 105a is required when the electric device is arranged in the electric device, which hinders downsizing of the electric device. Even if the lower end portion of the connector 105 does not protrude from the end surface of the housing 101, the lead wire 105a will protrude from the end surface, so that an installation space for arranging the lead wire 105a is required, and the lead wire 105a needs to be installed. It was an obstacle to downsizing the equipment.

Similarly, as a miniaturization of a motor having a connector, for example, an actual Kaihei 5-781.
There is one disclosed in Japanese Patent Publication No. 70. In the motor described in this publication, a connector is provided in a container for accommodating the motor body, and the direction of the connecting portion of the connector, which is connected to the opposing external connector, is provided along the rotation axis of the motor body. The size of the motor is reduced by reducing the distance between the connector and the center of the motor body. However, it is not clear whether or not the end of the connector attached to the motor protrudes from the end face of the motor, but even if it is assumed that it does not protrude, this connector does not Since the lead wire connected to is pulled out in the direction along the rotation axis of the motor, this lead wire projects from the end surface of the motor, and this lead wire is arranged in the same manner as the conventional one described above. Space is required, and as a result, electrical equipment cannot be downsized.

[0005]

As described above, in the conventional motor, although the size of the motor itself has been reduced, it is possible to reduce the storage space when the motor is incorporated into an electric device. From the point of view, it is not sufficient, and there is a problem that electrical equipment cannot be miniaturized. By the way, generally, when mounting a motor on an electric device, a flange portion or a mounting piece provided with a screw hole is formed on the outer peripheral portion of the motor housing, and a mounting screw is inserted into the screw hole to mount the motor. There is. Therefore, it is necessary to inevitably provide a space for tightening the screw around the housing of the motor, that is, a so-called dead space. The inventor has focused on this dead space to solve the above-mentioned conventional problems.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is mounted on a housing provided with a rotor having a stator and an output shaft therein and an outer peripheral wall of the housing. In a motor including a connector having a connecting portion to which a connecting connector is connected, the connecting portion of the connector is attached to the housing with a connecting direction of the connecting member being oriented in a direction orthogonal to an axis of an output shaft of the rotor. It is a motor.

With the above construction, the other party connected to the connector attached to the motor housing in the dead space which is inevitably formed on the outer peripheral portion of the motor housing when mounting the motor on the electric equipment. By arranging the connector and the lead wire connected to the connector, the electric device can be downsized.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to FIGS. 1 is a perspective view of the motor 1 with the connector attached, FIG. 2 is a side view of the motor as seen from the direction in which the connector is attached, and FIG. 3 is a side view of the motor as seen from the connector connection side. FIG. 4 is a plan view of the motor as seen from above with a part of the connector in cross section. As shown in the figure, a stepping motor (hereinafter, simply referred to as a motor) 1 includes a housing 2, a stator 3 provided in the housing 2, and a rotor 4 rotatably provided via an output shaft 4a. It is configured. The casing 2 has a case 2a formed in a bottomed cylindrical shape having an opening on one end side, that is, an upper side in the figure, and an end plate member fixed to the case 2a by a fixing means (not shown) that covers the opening of the case 2a. 2b. Further, the end plate member 2b is provided with a pair of mounting pieces 2c formed so as to project from the outer periphery, and mounting holes 2d are formed in each of the mounting pieces 2c. Further, a gear device 5 is incorporated in the casing 2, and a gear (not shown) of the gear device 5 meshes with a gear (not shown) provided on the output shaft 4a of the rotor 4 to rotate the gear. When the output shaft 4a of the child 4 rotates, the rotational force is transmitted via the gear device 5 to the drive shaft 6 penetrating the bearing 2e provided on the end plate member 2b.

The motor 1 is attached to an electric device (not shown) through a mounting screw (not shown) inserted through the mounting hole 2d. Therefore, when attaching the motor 1 to the electric device, it is essential to provide a space for fastening the mounting screw (not shown) on the outer peripheral portion of the housing 2 of the motor 1,
After the motor 1 is attached, the space becomes a so-called dead space.

A connector 7 is integrally attached to the outer peripheral wall of the housing 2 by a cover body 7a attached to the housing 2, and the connector 7 is attached to the connector 7. A substantially rectangular fitting hole 8 into which an external connector 10 to be described later as a connected connector to be connected is fitted and connected is formed.
A plurality of connection pins 9 connected to a coil winding (not shown) wound around the stator 3 are provided on the bottom wall 8a of the above. Further, as shown in FIG. 3, guide grooves 8b, 8b are formed on the upper and lower inner side walls of the fitting hole 8. The fitting hole 8 and the connecting pin 9 form a connecting portion of the connector 7. When the connection pin 9 is provided in an exposed state without providing the fitting hole 8, the connection pin 9 serves as the connection portion.

The connector 7 has the fitting hole 8
The attachment direction of the external connector 10, that is, the direction in which the external connector 10 is inserted, is oriented in the direction orthogonal to the axial direction of the output shaft 4a of the rotor 4 of the motor 1, that is, the circumferential direction of the housing 2.

Next, the external connector 10 connected to the fitting hole 8 of the connector 7 will be described. The external connector 10 has a substantially rectangular cross section so that it can be fitted into the fitting hole 8, and guide protrusions 10a guided by the guide grooves 8b and 8b formed on the inner wall of the fitting hole 8. 10a are formed. Further, the external connector 10 is formed with a plurality of pin fitting holes 11 in which contact pieces (not shown) connected to the plurality of connection pins 9 provided in the fitting hole 8 are arranged. A plurality of leads 12 connected to the contact piece (not shown) are provided on the surface opposite to the surface on which the pin fitting hole 11 is formed.

To connect the external connector 10 to the connector 7, the guide projections 10a and 10a are fitted into the fitting grooves 8b and 8b, and the pin fitting hole 11 is formed.
This is done by fitting the external connector 10 into the fitting hole 8 of the connector 7 while fitting it into the connection pin 9. When the external connector 10 is connected to the connector 7 as shown in FIGS. 2 and 4, the ends of the external connector 10 and the lead wires 12 are oriented in the circumferential direction of the housing 2. .

When the external connector 10 is connected to the connector 7 as described above, the end portion of the external connector 10 and the lead wire 12 are in the direction orthogonal to the axial direction of the output shaft 4a of the rotor 4, that is, the housing 2. Will be arranged along the circumferential direction. Therefore, when the external connector 10 is connected to the connector 7 in a state where the motor 1 is mounted inside an electric device (not shown) through a mounting screw (not shown) through a mounting hole 2d provided in the mounting piece 2c of the end plate member 2b, The external connector 10 and the lead wire 12 are arranged in the dead space of the outer peripheral portion of the motor 1 as described above, and a unique space for disposing or accommodating the external connector 10 and the lead wire 12 is required. Therefore, it is possible to achieve space saving without doing so, and it is possible to achieve downsizing of electrical equipment by this space saving. Further, as compared with the conventional one in which the connector connecting portion is arranged along the rotation axis direction of the motor, the end portion or the lead wire of the external connector connected to this connector protrudes from one end surface of the motor. Therefore, there is no need for a space for arranging the ends of the external connectors or the lead wires, and the factor of upsizing of the electric device can be eliminated.

As shown in FIG. 5, the structure of the external connector 21 connected to the connector 7 attached to the housing 2 is fitted to the fitting portion 21a fitted in the fitting hole 8. The exposed portion 21b exposed from the hole 8 to the outside is provided with the fitting portion 21.
The external connector 21 is connected to the connector 7 by bending the housing 2 side by a predetermined angle A with respect to a.
The exposed portion 21b and the exposed portion 2 when connected to
The lead wire 22 provided at 1b can be arranged closer to the outer peripheral portion of the housing 2. By configuring the external connector 21 in this way, the external connector 21 and the lead wire 22 to the dead space in the outer peripheral portion of the housing 2
The external connector 21 and the lead wire 22 can be brought closer to the outer peripheral portion of the housing 2, so that the dead space can be reduced. The size and shape of the mounting piece 2c can be selected, and the degree of freedom in design can be obtained.

It should be noted that the size of the predetermined angle A is a space required for the outer peripheral portion of the housing 2 when the motor 1 is attached to an electric device, that is, a dead space region (two-dot chain line B in FIG. 5). It is sufficient to set the angle (about 30 degrees in FIG. 5) such that at least the exposed portion 21b of the external connector 21 is positioned within the area surrounded by.

A connector 30 attached to the housing 2
By configuring (another embodiment of the connector) as shown in FIGS. 6 and 7, the external connector 10 and the lead wire 12 connected to the external connector 10 are formed.
Can be arranged closer to the housing 2 side. That is, the fitting direction of the fitting hole 31 as the connecting portion formed in the connector 30, that is, the direction of the connecting direction,
The center point P of the housing 2, that is, the center point O of the output shaft 4a of the rotor 4 and the center point P of the opening S of the circle S whose radius is the length of the fitting hole 31 up to the center point P of the opening. The lead wire 12 connected to the external connector 10 can be arranged close to the housing 2 side by adopting a structure in which the lead wire 12 is formed so as to be substantially aligned with the passing tangent T direction. A connection pin 32 that fits into the pin fitting hole 11 provided in the external connector 10 is provided on the bottom wall of the fitting hole 31.
The connector 30 is covered by a cover body 30a.

By constructing the connector 30 as described above, the external connector 10 and the lead wire 12 can be surely arranged in the dead space on the outer peripheral portion of the housing 2, and Since the external connector 10 and the lead wire 12 can be brought closer to the outer peripheral portion of the housing 2 as in the case of 5, the size, shape, etc. of the mounting piece 2c can be reduced so as to reduce the dead space. Since the selection is possible, the degree of freedom in design can be obtained.

The degree of inclination of the fitting hole 31 is the same as in the case shown in FIG. 5, when the motor 1 is attached to an electric device, the space required for the outer peripheral portion of the housing 2, that is, the dead space. It suffices to set the inclination so that at least the external connector 10 is located within the area (area surrounded by the chain double-dashed line C in FIG. 7).

In the above embodiment, the connection pin 9 is provided on the bottom wall of the fitting hole 8 of the connector 7 and the external connector 10 is provided with the pin fitting hole 11 into which the connection pin 9 is fitted. However, this may be configured such that a pin fitting hole is provided in the bottom wall of the fitting hole 8 of the connector 7 and a connection pin is provided in the external connector 10.

Further, in the above embodiment, the stepping motor is used as the motor, but the invention is not limited to the stepping motor. However, when a large number of lead wires are pulled out from the motor like a stepping motor, the space saving is more effective.

Further, in the above-described embodiment, the housing 2 of the motor 1 has a cylindrical outer shape, but it goes without saying that this can be applied to a rectangular (substantially square) shape. Absent.

In the above embodiment, the gear device 5 is incorporated in the housing 2. However, the gear device 5 may be provided outside the housing 2, that is, separately from the motor. It is possible.

[0024]

As described above, according to the present invention, the connected connector connected to the connector provided on the housing of the motor and the lead wire connected to the connected connector are
When this motor is attached to an electric device, it can be arranged in a dead space which is inevitably formed on the outer peripheral portion of the housing, and therefore, there is an effect that the electric device can be downsized.

[Brief description of drawings]

FIG. 1 is a perspective view of a motor and a connected connector according to a first embodiment of the present invention.

FIG. 2 is a side view of the motor connector according to the above embodiment as viewed from the attachment direction.

FIG. 3 is a side view of the motor connector according to the above embodiment as viewed from the direction of the connecting portion.

FIG. 4 is a plan view in which a part of the connector of the motor according to the above-described embodiment is cross-sectioned.

FIG. 5 is a view showing another embodiment of the connected connector in the above embodiment.

FIG. 6 is a perspective view of a motor to which a connection connector according to another embodiment of the above embodiment is attached.

FIG. 7 is a plan view of a motor in which a part of a connector according to another embodiment is sectioned.

FIG. 8 is a perspective view of a conventional motor (a perspective view of a motor in a state where a connector and a connected connector are connected to each other).

[Explanation of symbols]

 1 Motor 2 Motor Housing 3 Stator 4 Rotor 4a Output Shaft 7 Connector 8 Fitting Hole (Connecting Portion) 9 Connection Pin 10 External Connector (Connected Connector)

Claims (1)

[Claims] 1. A motor having a housing having a stator and a rotor having an output shaft therein, and a connector having a connecting portion attached to an outer peripheral wall of the housing and connected to a connected connector. The motor is characterized in that the connecting portion of the connector is attached to the housing so that the connecting direction of the connecting portion is orthogonal to the axis of the output shaft of the rotor.