JP2001112211A - Compact motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact motor that reduces the number of parts for composing a terminal part, can simplify the mounting structure of a circuit board part, at the same time, can be miniaturized, and can increase the space of a train wheel part. SOLUTION: In the compact motor, a cutout part is formed at one part of a motor case, and a connector part where an external connector for energizing a motor coil is interlocked to the cutout part is provided, a connector part 24 where the external connector being inserted from the outside is interlocked is stuck to or is integrated with a cover part 25 that has an opening part 25b that becomes space for receiving the external connector by synthetic resin, and a flexible substrate 23 is interposed between the motor coil and the connector 24 as a conductive member.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small-sized motor in which a connector is fitted to a connector housing to perform electrical connection.

[0002]

2. Description of the Related Art Conventionally, small motors such as a geared stepping motor for driving a louver provided at an air outlet of an air conditioner have been known. In supplying electric current to the coil of this kind of small motor, there are many leads directly attached to terminals. However, such a method of directly attaching a lead wire has a problem that the lead wire tends to be an obstacle when handling a small motor, and an excessive force is erroneously applied to the lead wire.

As a solution to such a problem, there has been known a small motor in which a connector housing disclosed in Japanese Patent Application Laid-Open No. H10-14170 is attached to a motor body. FIG. 11 shows an outline of a small motor disclosed in Japanese Patent Application Laid-Open No. 10-14170.

A terminal portion 202 for supplying current to the coil of the small motor 201 has two coils 203 and 20.
4, a terminal pin 205, a holder member 206 through which the terminal pin 205 is inserted and fixed, a circuit board 207 held by the holder member 206, and a connector electrically connected to the circuit board 207. It is composed of a housing 208 and a cover 209 that covers these members.

[0005] Assembling of the terminal portion in the conventional small motor 201 will be described. First, the circuit board 207 is inserted into the holder board 206 into the circuit board insertion hole, and one surface of the circuit board 207 is brought into contact with the holder board 206. Then, coil bobbin 2
The holder member 206 and the circuit board 207 are connected to the coil bobbin 211, such that the terminal pins 205 fixed to the reference numerals 11 and 212 pass through the holder member 206 and the circuit board 207.
Assembled with 212. Thereafter, the connector housing 208 is assembled to the holder member 206, and the connection terminals are fixed to the circuit board 207. And the circuit board 20
7 and the terminal pins 205 are soldered, and the cover 209 is finally attached.

The cover 209 fits into a notch (not shown) of the cylindrical case 213 and engages with the flat case 214 so as not to come off the small motor 201. As described above, the cover 209 serves as a cover on the outside of the connector housing 208, and also has a function as a case of the small motor 201 in cooperation with the cylindrical case 213 and the flat case 214.

[0007]

Problems to be Solved by the Invention
The terminal portion of the small motor 201 shown in No. 0 is composed of a holder member 206, a circuit board 207, a connector housing 208, and a cover 209, and is assembled in a complicated manner. In particular, the mounting structure of the terminal portion of the connector housing 208 to another member is complicated. As described above, since the terminal portion of the conventional small motor 201 uses a large number of components and is assembled in a complicated manner, it is disadvantageous in terms of workability and cost.

In the conventional small motor 201, the structure of the holder member 206 for mounting the circuit board 207 is complicated. Further, in order to prevent the terminal portions of the small motor 201 from protruding, the circuit board 207 is used.
In consideration of the thickness of the holder member 206, the thickness of the holder member 206 is suppressed. However, the holder member 206 also needs a certain thickness, and tends to be large in the radial direction as a whole. Further, since the circuit board 207 and the holder member 206 are configured to enter the wheel train 215 of the small motor 201, the space in which the wheel train 215 is disposed is narrowed, and the gears and the like are reduced in size. It is subject to restrictions.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. The present invention has been made to reduce the number of parts constituting a terminal portion, and has a simple structure, which has good workability and manufacturing efficiency, and has a low cost. It is an object of the present invention to provide a small-sized motor which is advantageous in view of the aspect. Another object of the present invention is to provide a small-sized motor that can simplify the mounting structure of the circuit board portion, can be downsized, and can increase the space of the wheel train.

[0010]

In order to achieve the above object, according to the first aspect of the present invention, a notch is formed by cutting a part of a motor case, and the motor coil is energized in the notch. Motor has a connector member having a connector portion to which an external connector is connected, and the connector member is integrally provided with a cover portion covering the cutout portion.

Further, according to the second aspect of the present invention, the first aspect of the present invention is provided.
In the small motor described above, the connector member and the cover portion are formed by integral molding of a synthetic resin.

According to the third aspect of the present invention, there is provided a terminal pin having circularly arranged pole teeth constituting a stator portion, and a motor coil wound around the pole teeth. In a small motor configured to connect an external connector to a connector housing attached to the motor, electrical connection to the connector is provided as a connector portion to which an external connector inserted from the outside is connected and a space for receiving the external connector. A cover having an opening is fixed or molded integrally with a synthetic resin, and the two are integrated.

According to a fourth aspect of the present invention, in the small motor of the first, second or third aspect, an external connector is connected to the arm extending from the inside of the cover to the outside and the connector. After that, a locking member having a locking portion for preventing the connection from being disconnected is provided separately from the connector member, and the locking portion is bent at the arm portion when the external connector is connected to the connector portion. The connection with the external connector is allowed, and when the external connector is connected, the bending of the arm is restored to prevent the external connector from being detached.

According to the invention described in claim 5, according to claim 4 of the present invention,
In the small motor described above, the arm portion is configured to extend from a pedestal that supports a current-carrying member between a terminal of the motor coil and a connector pin held by the connector portion.

Further, according to the invention described in claim 6, according to claim 5,
In the small motor described above, the pedestal is configured to be fixed to a stator core around which the motor coil is wound.

According to the seventh aspect of the present invention, in the fifth aspect,
Or the small motor according to claim 6, wherein the pedestal passes a press-fit fixing portion provided to press-fit and fix the stator core around which the motor coil is wound, and a terminal pin to which a terminal of the motor coil is connected. It has a terminal pin window provided as a through hole so as to enable soldering connection. According to an eighth aspect of the present invention, in the small motor according to any one of the first to seventh aspects, a flexible substrate as an energizing member is provided between a terminal of the motor coil and a connector pin held by the connector. The structure is interposed.

According to the ninth aspect of the present invention, a notch portion is formed by cutting out a part of the motor case, and the notch portion is provided with a connector portion to which an external connector for energizing a motor coil is connected. In a small motor in which a connector member is held, a flexible board as a current-carrying member is interposed between a terminal of a motor coil and a connector pin held in a connector portion.

According to a tenth aspect of the present invention, in the small motor according to the ninth aspect, the flexible substrate is a single-sided flexible substrate having a circuit formed on only one surface, and the terminal of the motor coil and the flexible substrate. The connection with the board and the connection between the connector pins and the flexible board are both performed only on one surface on which the circuit is formed.

According to the eleventh aspect of the present invention, in the small motor according to any one of the first to tenth aspects,
The connector portion is formed so that the external connector can move and be connected in parallel to the motor rotation axis.

Further, according to the twelfth aspect of the present invention, in the small motor according to any one of the first to eleventh aspects, an inclined portion for smoothly guiding the external connector to the entrance of the connector portion is formed. According to a thirteenth aspect of the present invention, in the small-sized motor according to any one of the first to twelfth aspects, the contact surface of the connector portion when the external connector is connected is positioned from the center in the axial direction of the small-sized motor. Further, it is configured to be located on the insertion side of the external connector.

The connector member serving as the terminal according to the present invention has a structure in which the connector and the cover are integrated. The function of the terminal portion constituted by the conventional connector housing and cover is satisfied by the integrated connector member. The number of parts is reduced, and a complicated structure as in the related art is not required.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. First, a small motor according to the first embodiment will be described with reference to FIGS.

First, the structure of the terminal portion and the receiving stand, which are the points of the present invention, will be described with reference to FIGS. 1 and 4 to 7. The connector member 6 serving as a terminal portion is formed by fixing a connector portion 24 to which a connector to be inserted from the outside is connected and a cover portion 25 having an opening 25b serving as a receiving space for the connector to be inserted from the outside or by synthetic resin. They are integrally molded, and both are integrated.

The connector 24 is provided with a cover 25 described later.
The connector 25 is provided integrally with the cover 25 at the center of the connector, and holds the connector pins 24a and the flexible substrate 23 which constitute the power supply path.

As shown in FIGS. 1 and 3 to 7, the cover 25 is provided at both ends of the cover 25 with a cylindrical case 1.
A groove 25a provided to fit over the notch 11a, an opening 25b provided as a receiving space for an external connector inserted from the outside, and an external connector inserted from the outside. Connector guides 25c provided on both sides as guide grooves, two insertion confirmation windows 25d provided to confirm insertion of an external connector inserted from the outside, and a member extending from the inside to the outside as necessary. An engaging window 25e provided to allow the stop member 22a to pass therethrough, and engaging pins 25f provided at two upper portions so as to engage with the flat case 20 so as not to come off the small motor 1.
And a connector portion 24 formed by integral molding is provided inside.

The opening 25b provided in the cover 25 is provided with a curved inclined portion 25g which is a chamfered portion at the front end inside the entrance so as to improve the operability of inserting an external connector inserted from the outside. ing. The connector section 24 is provided near the shaft end face opposite to the output shaft so as to improve the insertion workability of the external connector inserted from the outside. That is, the abutting surface 24b against which the external connector abuts is positioned from the center in the axial direction of the small motor 1 so that the external connector can be coupled to the connector pin 24a by slightly inserting the external connector from the bottom side of the small motor 1. It is arranged to come to the side.

As shown in FIG. 1, a receiving base 22 corresponding to the holder member 206 of the conventional example has a locking member 22a for preventing the inserted external connector from coming off, and a stator ( In FIG. 1, a press-fit fixing portion 22b provided so as to press-fit the upper stator portion 8a) and terminal pins 21 and 21 of the motor coils 9 and 10 pass from the receiving base 22 so that soldering connection can be performed. The terminal pin window 22c which becomes the provided through hole is provided.

As shown in FIG. 1, the current-carrying members for the motor coils 9 and 10 are soldered to the terminal pins 21 of the motor coils 9 and 10 and the terminal pins 21. The flexible board 23 is made of a soft and shrinkable material having good solderability and a connector pin 24a to be soldered to the flexible board 23. The flexible substrate 23 is a single-sided flexible substrate having wiring on one side, but may be a double-sided flexible substrate having wirings on both surfaces.

The receiving table 22 is slightly thicker than the conventional holder section 206 so that the depth of the press-fit fixing section 22b can be increased. Also, the terminal pin window 22c
Is configured so that not only the terminal pins 21 pass through but also the support portions 9b of the terminal pins 21 of the coil bobbin 9a holding the terminal pins 21 enter from one side thereof. With this configuration, the cradle 22 allows the motor coil 9,
As a result, the size of the small motor 1 in the radial direction can be reduced and the windings of the motor coils 9 and 10 can be prevented.

The locking member 22a provided on the receiving table 22
As shown in FIG. 1, below the pedestal 22 and the terminal pin window 2
It is provided so as to protrude laterally from a portion surrounding 2c.
The locking member 22a has an arm portion and a locking portion whose tip is bent at a right angle so as to face the connector pin 24a. When the external connector is inserted into the locking portion 22a, the locking portion 22a receives a force indicated by an arrow A in FIG.
It has an elastic force to bend in the direction. The external connector is fitted into the opening 25b of the cover 25, and the connector pin 2
When connected to 4a, the locking portion 22a is restored to its original state, and the rear surface of the external connector faces the distal end surface 22d of the locking member 22a, so that the external connector cannot be easily removed.

Flexible substrate 23 as current-carrying member
As shown in FIG. 1, extends from the connection portion with the connector pin 24a in the horizontal direction along the connector portion 24, is then bent downward at a right angle, is again bent at a right angle near the locking portion 22a, and then , Along the cradle 22, and is bent upward again at a right angle. Then, soldering is performed at the terminal pin 21 and the terminal pin window 22c. in this way,
Since the flexible board 23 is bent many times and is connected to the terminal pins 21 and the connector pins 24a with a margin, a force is applied when the external connector is fitted to the connector pins 24a, and the connector pins 24a and the connector section Even if the position of the terminal 24 shifts or expands / contracts, the effect does not reach the soldered portion of the terminal pin 21 and the connection of the terminal pin 21 is maintained in a stable state.

Further, since the flexible substrate 23 is bent as shown in FIG. 1, a single-sided flexible substrate having a circuit formed on only one side can be used.
Soldering work is performed on only one side. Further, by using the flexible substrate 23, it is not necessary to use the circuit board 207 having a thickness as in the related art.
Can be reduced in the radial direction. Further, a space is formed in the upper portion of the receiving stand 22 in FIG. 1, and the space of the gear transmission mechanism 4 serving as a wheel train mechanism can be increased.

The connector member 6 has an opening 25b.
However, since it is directed in a direction parallel to the axial direction of the small motor 1, that is, directly downward in FIG. 1, the size of the small motor 1 in the radial direction can be reduced as compared with the conventional configuration in which the small motor 1 is directed downward. Become. In addition, since the connector portion 24 is disposed on the bottom side compared to the related art and the flexible substrate 23 is used, the space S above the connector portion 24 is reduced.
The connector pins 24a and the flexible substrate 2
3 can be easily soldered.

As shown in FIG. 1, the small motor 1 is composed of a stator 2, a rotor 3, a gear transmission mechanism 4 serving as a reduction gear train, an output shaft 5, and a connector member 6. Stepping motor. And the stator part 2 and the gear transmission mechanism 4 are arrange | positioned adjacently in the axial direction.

The stator portion 2 has pole teeth 7 arranged in a circular shape by alternately tangling the tip portions of the two stators, and similar pole teeth 8 arranged in the axial direction with the pole teeth 7. And a coil 10 wound around the outer circumference of the pole teeth 7 and a cylindrical case 11 also serving as a stator. The coil 9 is wound around the pole teeth 7 via a coil bobbin 9a, and the coil 10 is wound around the pole teeth 8 via a coil bobbin 10a.

The rotor section 3 includes a fixed rotor shaft 13
And a rotor 14 rotatably supported by the rotor shaft 13 and having a magnet 14a.

As shown in FIG. 2, the gear transmission mechanism 4 includes a pinion 14b formed on the rotor 14, a first gear 15 meshing with the pinion 14b, and a second gear 16 meshing with the first gear 15. The third gear 17 meshing with the second gear 16 and the fourth gear 17 meshing with the third gear 17
The output gear 5 includes a number gear 18 and a gear 5 a provided on the output shaft 5 so as to mesh with the number 4 gear 18. Note that the gear transmission mechanism 4 is a reduction mechanism, and the pinion 14b
The gears 15, 16, 17, 18, and 5a are configured to transmit rotation at reduced speed.

The gear transmission mechanism 4 includes first gears 15 and 2
A plurality of gear support shafts 151, 161, 171, and a second gear 16, a third gear 17, and a fourth gear 18 are fixed to a synthetic resin middle ground plate 19 disposed adjacent to the stator portion 8 a.
By being rotatably supported by 181, it is arranged on the middle base plate 19. The second gear 16 has a friction mechanism incorporated therein.

As shown in FIG. 8, the middle base plate 19 has a circular hole 19a provided at the center for passing the rotor shaft 13, and a circular base 19 having a thicker width surrounding the circular hole 19a.
b, two pillars 19c, 19c, and two fitting projections (not shown) for positioning with the stator. A receiving base contact portion 19e with which the receiving base 22 comes into contact is provided on the middle base plate 19 so as to cut out the outer peripheral portion of the middle base plate 19 in an arc shape. The outer peripheral portion of the stator portion 8a is exposed in the cut-out portion, and the exposed portion fits into the press-fit fixing portion 22b of the receiving base 22 to fix the receiving base 22 (see FIG. 8). Further, the outer periphery of the bobbin 10a on the side of the pedestal contact portion 19e is cut out so as to have a shape similar to that of the pedestal contact portion 19e, and has a linear shape capable of contacting the pedestal 22. With such a configuration, the pedestal 22
And the radial width of the small motor 1 is prevented from increasing.

The circular base portion 19b fits into a circular hole in the central portion of the stator surrounding the rotor portion 3, and a fitting protrusion fits into a fitting hole (not shown) provided on the stator side, thereby forming a middle base plate. 19 is positioned and held. The circular base 19b is provided with gear support shafts 151, 161, 171,
181, which prevents them from slipping out to the rotor portion 3 side and increases the holding force due to its large width. The one end 5b of the output shaft 5 is also formed so that a part of the circular pedestal portion 19b is engaged with the one end 5b, thereby preventing the one end 5b from coming off to the rotor portion 3 side. In addition,
A part of the one end 5b is also placed on the upper stator portion 8a fitted and arranged so as to surround the circular base portion 19b, and firmly receives the force applied to the output shaft 5.

The output shaft 5 is made of a synthetic resin lighter than iron such as SUS, and the gear 5a is integrally formed. One end 5b of the output shaft 5 is rotatably supported by an output shaft support 19f provided on the middle base plate 19. The center of the output shaft 5 is supported by a support cylindrical portion 20 formed by squeezing a flat case 20 (see FIG. 1).
a is rotatably supported. The other end 5c of the output shaft 5
Has a slightly smaller diameter than the center, and is engaged with another device, for example, a louver drive mechanism (not shown) of an air conditioner.

The operation of the small motor 1 configured as described above is as follows.

An external connector (not shown) is externally inserted into the opening 25b of the cover 25, and the external connector is electrically connected to the connector pin 24a. Then, the external connector, the connector pin 24a, and the flexible substrate 2
When electric power is supplied to the motor coils 9 and 10 via the terminal pins 3 and the terminal pins 21, a magnetic interaction acts between the stator of the stator portion 2 and the magnet 14a of the rotor 14, and the rotor 14 Rotate. Then the rotation is
The power is transmitted to the output shaft 5 while being reduced through the gear transmission mechanism 4 including the pinion 14b. The rotation of the output shaft 5 causes the opening / closing operation of an external device, for example, a louver of an air conditioner or a heater.

Next, different embodiments of the present invention shown in FIGS. 9 and 10 will be described. In the description of the different embodiments of the present invention, the same components as those in the first embodiment of the present invention will be denoted by the same reference numerals, and redundant description will be omitted.

The main difference between the second embodiment of the present invention and the first embodiment shown in FIG.
4 shows the shape of the connector pin 24a held by the connector 4 and the length of the flexible board 23 associated therewith. This connector pin 24a penetrates through the connector section 24 and
The tip that has entered the internal space is bent 90 degrees. The connector pins 24a are connected to the flexible board 23 by soldering in the vicinity of the receiving table 22 and in the vicinity thereof. Since the connection between the flexible board 23 and the connector pin 24a is performed at a position close to the terminal pin 21, the length of the flexible board 23 can be reduced as compared with the first embodiment.

The work of soldering the connector pin 24a and the flexible board 23 is performed by bending the bent front end 2a.
4c is arranged not on the back side of the connector member 6 but on the near side,
Since the soldering part is on the near side, it is easy to perform, and the workability is greatly improved. Further, since the bent distal end portion 24c protrudes toward the near side, the upper space S surrounded by the connector portion 24 and the cover portion 25 can be increased, and if necessary, the upper space S can be increased as shown by the one-dot chain line in FIG. It is also possible to cut large. In this embodiment as well, the flexible substrate 23 is a single-sided flexible substrate with one surface soldered, but a double-sided flexible substrate may be used.

The main difference between the third embodiment of the present invention and the first embodiment shown in FIG.
And the shape of the cradle 22. This cover part 25
Is a lid 25 that can be freely opened and closed between an upper end 25j provided with a fitting pin 25f to facilitate the soldering operation and the connector 24 holding the connector pin 24a.
h.

On the other hand, the receiving base 22 is provided with a protruding portion 22e for inserting the tip of the lid 25h between the lid 25h and the upper end 25j when the lid 25h is closed. If the cover part 25 having the lid part 25h and the pedestal 22 having the protruding part 22e are used as a pair, the soldering work becomes very easy. This is because the soldering operation with the lid 25h opened can be performed. After the soldering between the terminal pins 21 of the motor coils 9 and 10 and the flexible substrate 23 is completed, the cutout 11a of the cylindrical case 11 is
The connector member 6 is fitted, and the flat case 20 is attached. Thereafter, the connector pins 24a and the flexible substrate 23 can be soldered. When the soldering is completed and the lid 25h is closed, the tip of the lid 25h is sandwiched between the upper end 25j of the cover 25 and the protruding portion 22e of the pedestal 22, and is accurately received on the pedestal 22. Can be

In the case of the small motor 1 according to the first or second embodiment, the connector pins 24a and the flexible substrate 2
The soldering of the connector member 6 is performed before or after the connection between the terminal pin 21 and the flexible board 23 and before the connector member 6 is attached to the small motor 1. It is performed in a stable state. On the other hand, in the third embodiment, the connector member 6
Can be soldered to the connector pin 24a and the flexible board 23 after the is attached to the small motor 1, and the workability of the soldering is improved.

Each of the above embodiments is an example of a preferred embodiment of the present invention. However, the present invention is not limited to these embodiments, and various modifications can be made without departing from the gist of the present invention. It is. For example, as a small motor, in addition to a stepping motor, an AC small synchronous motor,
A small DC motor or the like may be used.

In addition to the integration of the connector portion 24 and the cover portion 25 by resin molding, the connector portion 24 and the cover portion 25 may be fixed with an adhesive or the like. Further, the portion supporting the flexible board 23 of the receiving table 22 may be eliminated, and a portion corresponding to the locking member 22a may be provided in the connector portion 24. Further, the connector section 24 and the cover section 2
The direction of the opening 25b of the part where the part 5 is integrated may be obliquely downward as in the conventional case, may be turned upside down by turning it upside down, or may face the outer periphery in the radial direction.

[0052]

As is clear from the above description, each invention has the following effects.

In each of the first, second and third aspects of the present invention,
Since both the connector section and the cover section are integrated, it is not necessary to assemble them in a complicated manner. The simplification of the assembly improves the quality of the product, and also leads to a significant reduction in the number of man-hours and an increase in the production efficiency without having to manage the parts. According to the second aspect of the present invention, since both are further integrated by integrally molding the resin, the manufacturing efficiency is further improved.

According to the fourth aspect of the present invention, the external connector to be inserted into the opening can be easily inserted by the action of the bending of the arm, and the external connector once inserted can be inserted into the locking portion. It does not fall off by the action.

According to the fifth aspect of the present invention, the length of the arm portion extending from the receiving table easily causes the bending, and this bending makes the insertion work of the insertion connector from the outside easy and the external connection. Provides connector disconnection prevention. In addition, since the locking member is formed on the pedestal supporting the energizing member,
There is no need to provide the locking member as a single component or to individually fix it to the case member or the like.

In the invention according to claim 6, the cradle is
Since it is fixed to the robust stator core, it can be mounted in a stable state, and the fixing operation can be simplified. According to the seventh aspect of the present invention, since the terminal pins connected from the terminals of the motor coil project through the terminal pin windows of the receiving stand, the work of soldering the terminal pins and the current-carrying member becomes easy.

According to the eighth aspect of the present invention, the flexible substrate having a good current-carrying path exhibits flexibility, and even if an extra force is applied to the terminal portion, the flexible substrate, or the like during soldering, the effect is not affected. At the connection part of the camera. In addition, the use of a flexible substrate eliminates the need to use a circuit board having a conventional thickness, so that the size of a small motor in the radial direction can be reduced, and the space for a gear transmission mechanism serving as a wheel train mechanism can be increased. It is also possible.

According to the ninth aspect of the present invention, since a good flexible board is interposed as a current supply path, a force is applied when, for example, a connector from the outside is fitted to the connector pin, and the connector pin and the external connector are connected. Even if the position shifts or expands or contracts, the effect does not reach the terminal pins, and the connection maintains a stable state. In addition, the use of a flexible substrate eliminates the need to use a circuit board having a conventional thickness, so that the size of a small motor in the radial direction can be reduced, and the space for a gear transmission mechanism serving as a wheel train mechanism can be increased. It is also possible.

According to the tenth aspect of the present invention, a single-sided flexible substrate can be used, so that the cost of the power supply path is reduced. In addition, since the connection is performed only on one side of the single-sided flexible substrate, the connection operation can be performed from the space on the same side with respect to the flexible substrate, and the operation efficiency can be improved. According to the eleventh aspect of the present invention, since the external connector can be inserted from directly below the small motor, the operability of inserting the external connector is improved. Also, no extra space is required for insertion.

Further, according to the twelfth aspect of the present invention, the external connector is smoothly fitted into the connector along the inclined portion, and the insertion work is facilitated. According to the thirteenth aspect of the present invention, the connector can be connected to the connector by slightly inserting the external connector, thereby improving the efficiency of the connection operation.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a small motor according to a first embodiment of the present invention.

FIG. 2 is a plan view showing a gear transmission mechanism of the small motor of FIG.

FIG. 3 is a side view of a cutout portion of a cylindrical case of the small motor of FIG.

FIG. 4 is a front view of a connector member used for the small motor of FIG. 1;

FIG. 5 is a plan view of a connector member used for the small motor of FIG. 1;

FIG. 6 is a bottom view of a connector member used for the small motor of FIG. 1;

FIG. 7 is a sectional view taken along line BB of FIG. 4;

FIG. 8 is a plan view of a middle base plate portion of the small motor of FIG. 1;

FIG. 9 is a side sectional view of a small motor according to a second embodiment of the present invention.

FIG. 10 is a side sectional view of a small motor according to a third embodiment of the present invention.

FIG. 11 is a side sectional view of a conventional small motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Small motor 2 Stator part 3 Rotor part 4 Gear transmission mechanism 5 Output shaft 7, 8 pole teeth 9, 10 Motor coil 11 Cylindrical case 11a Notch part 12 Motor upper case 21 Terminal pin 22 Receiving stand 22a Locking member 22b Press fit Fixing part 22c Terminal pin 23 Flexible board 24 Connector part 24a Connector pin 25 Cover part 25a Groove 25b Opening 25c Connector guide 25d Insertion confirmation window 25e Locking window 25f Engagement pin 25g Curved inclined part (inclined part) 25h Cover part

Continued on the front page (72) Inventor Ryuhei Wada 5329 Shimosuwa-cho, Suwa-gun, Nagano Prefecture F-term in Sankyo Seiki Seisakusho Co., Ltd.

Claims (13)

[Claims] 1. A small-sized type in which a notch portion is formed by cutting out a part of a motor case, and a connector member having a connector portion to which an external connector for energizing a motor coil is connected is formed in the notch portion. In the motor, the connector member is provided with a cover portion integrally covering the cutout portion. 2. The small-sized motor according to claim 1, wherein the connector member is formed by integrally molding the connector portion and the cover portion with a synthetic resin. 3. A motor according to claim 1, further comprising: pole teeth arranged in a circular shape forming a stator portion; and a motor coil wound around the pole teeth, and electrically connecting a terminal pin to which the coil is connected to the motor. In a small motor configured to perform by connecting an external connector to the attached connector housing,
A connector portion to which an external connector to be inserted from the outside is connected, and a cover portion having an opening serving as a receiving space for the external connector are fixed or molded by integral molding with a synthetic resin to integrate the two. Small motor. 4. A locking member having an arm extending from the inside of the cover to the outside, and a locking portion for preventing the connection from being disconnected after the external connector is connected to the connector. The locking member is provided separately from the connector member, and the locking member allows the arm portion to bend when the external connector is connected to the connector portion to allow connection with the external connector and to connect the external connector. 4. The small motor according to claim 1, wherein the bending of the arm portion is restored to prevent the external connector from being detached. 5. The arm according to claim 4, wherein the arm extends from a support for supporting a current-carrying member between a terminal of the motor coil and a connector pin held by the connector. Small motor. 6. The small motor according to claim 5, wherein the receiving base is fixed to a stator core around which the motor coil is wound. 7. The soldering machine according to claim 7, wherein the receiving base is provided with a press-fit fixing portion provided to press-fit and fix the stator core around which the motor coil is wound, and a terminal pin to which a terminal of the motor coil is connected. 7. The small motor according to claim 5, further comprising a terminal pin window provided as a through-hole so as to enable connection. 8. A motor according to claim 1, wherein a flexible board as a current-carrying member is interposed between a terminal of said motor coil and a connector pin held by said connector section. Small motor. 9. A small-sized motor having a notch formed by notching a part of a motor case, and a connector having a connector to which an external connector for supplying a current to a motor coil is connected. A small motor, wherein a flexible board as a current-carrying member is interposed between a terminal of the motor coil and a connector pin held by the connector section. 10. The flexible substrate is a single-sided flexible substrate in which a circuit is formed only on one surface,
10. The small-sized device according to claim 9, wherein the connection between the terminal of the motor coil and the flexible substrate and the connection between the connector pin and the flexible substrate are performed only on one surface on which the circuit is formed. motor. 11. The small-sized connector according to claim 1, wherein the connector portion is formed so that the external connector can move and be connected to the motor rotation axis in parallel. motor. 12. The small motor according to claim 1, wherein an inclined portion for smoothly guiding the external connector is formed at an entrance of the connector portion. 13. The small motor according to claim 13, wherein the contact surface of the connector portion when the external connector is connected is located further on the insertion side of the external connector than the axial center of the small motor. Any one of items 1 to 12
Small motor according to the item.