JPH1023700A - Motor for driving fan in air conditioner for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the quantity of moisture, such as rain drops, entering a case through the gap between a notch, formed in the portion of the upper end edge of a holding tube, corresponding to a coupler attachment area and a cou pler, by positioning the lower end edge of the notch at a level sufficiently higher than the upper face of a mounting flange. SOLUTION: In order to reduce moisture, such as rain drops from, entering a case 1, the vertical position of the lower end edge 35a of a second notch 28a, formed in the upper end edge of a holding tube 27 that forms a mounting bracket 26, is shifted sufficiently upward. Further, an engaging groove 38 is formed in part of a holder 30a that forms a coupler 19a. This keeps water drops contained in the outside air from entering the case 1, when a fan 25 is rotationally driven in the outside air take-in mode, and thus prevents corrosion in components and the occurrence of operation failure due to frozen moisture.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION A motor for driving a blower fan of an air conditioner for a vehicle according to the present invention is used for rotationally driving a blower fan of an air conditioner for a vehicle for cooling and heating the interior of a vehicle.

[0002]

2. Description of the Related Art A vehicle air conditioner is constructed by disposing a blower fan at an upstream end of a duct in which an evaporator for cooling air and a heater core for heating are arranged. Then, after adjusting the air taken in from the vehicle interior or exterior through the intake port provided at the upstream end of the duct to a desired temperature by the evaporator and the heater core, from the outlet provided at the downstream end of the duct, Blow out into the cabin.

Generally, a centrifugal multi-blade fan is used as the blower fan, and the centrifugal multi-blade fan is driven to rotate by a motor. Such a motor for driving a blower fan has a cylindrical case main body, and a stator is supported and fixed to an inner peripheral surface of the case main body. A lower end plate is fixed to the lower end opening of the case body, and an upper end plate is fixed to the upper end opening. As such a blower fan driving motor, for example, there is one having a structure disclosed in Japanese Patent Application No. 7-329096. 3 to 6 show a motor for driving a blower fan disclosed in this application.

[0004] This motor has a case main body 1 made of iron-based magnetic material or the like into a cylindrical shape. In the state where the above-mentioned motor is incorporated in an air conditioner for a vehicle, the case body 1
Are arranged in a vertical direction or a direction close thereto. A stator 2 (permanent magnet) is supported and fixed to an intermediate portion of the inner peripheral surface of the case body 1. Further, a lower end plate 3 is fixed to the lower end opening of the case body 1 by an appropriate fixing means known in the art. The lower end plate 3 has a width dimension smaller than the diameter of the case main body 1 as shown in FIG. Such a lower end plate 3 is disposed in the lower end opening of the case main body 1 in the diametric direction, and both ends in the length direction are connected to the lower end of the case main body 1 so that the case main body 1 is closed. It is supported and fixed to the lower end opening. Therefore, a pair of air supply gaps 4 is formed between the widthwise side edges of the lower end plate 3 and the lower end opening of the case body 1. On the other hand, the upper end plate 5 is fixed to the upper end opening of the case main body 1 by appropriate fixing means which is also well known in the related art. The upper end plate 5 is formed in a round pot shape as a whole, and has an outer diameter dimension that can completely cover the upper end opening of the case body 1.

A rotary drive shaft 6 is inserted through the center of the case body 1. The lower end of the rotary drive shaft 6 is rotatably supported at the center of the lower end plate 3 by a lower sliding bearing 7 as a lower bearing. The middle portion of the rotary drive shaft 6 near the upper end is rotatably supported at the center of the upper end plate 5 by an upper sliding bearing 8 as an upper bearing. A rotor 9 is fixed to a portion of the intermediate portion of the rotary drive shaft 6 which is located between the sliding bearings 7 and 8 and faces the inner peripheral surface of the stator 2. A commutator 10 for energizing a coil constituting the rotor 9 is fixed to an intermediate portion of the rotary drive shaft 6 in a portion between the rotor 9 and the upper end plate 5.

On the other hand, a brush substrate 11 made in an annular shape with an insulating material such as a synthetic resin is fixed to a portion between the upper end plate 5 and the commutator 10 near the upper end inside the case body 1. ing. The brush substrate 11 includes a ring-shaped substrate portion 12 and leg pieces 13 provided at a plurality of positions on an outer peripheral edge of the substrate portion 12. Each is L
A distal end of a leg 13 formed in a shape protruding radially outward from an outer peripheral edge of the substrate portion 12 in a letter shape is supported and fixed to an upper end portion of the case body 1 via a cushioning material 14 such as rubber. doing. That is, the first notch 1 formed at a plurality of places (four places in the illustrated example) of the upper end edge of the case body 1
The cushioning members 14, 14 are engaged with the insides of the cushioning members 5, 15, and the leg pieces 1 are inserted into recesses 16 formed in the cushioning members 14, 14.
The distal ends of 3, 13 are inserted. Each of the cushioning materials 14,
The upper end face of 14 is pressed down by the outer peripheral edge of the upper end plate 5. Accordingly, the cushioning members 14 do not fall out of the first cutouts 15, 15, and the brush substrate 11 is supported and fixed in a buffered manner inside the upper end of the case body 1.

[0007] The lower surface 2 of the substrate portion 12, which is one surface of the brush substrate 11 facing the commutator 10
The brushes 18, 18 are accommodated in the brush holders 17, 17 fixed at the respective positions so as to be displaceable in the diameter direction of the substrate portion 12, respectively. These brushes 18, 18
Are electrically connected to terminals 20, 20 of a coupler 19 provided on the outer peripheral surface of the case body 1, respectively. Each of the brushes 18, 18 is provided with an elastic force directed inward in the diameter direction of the substrate portion 12 by a spring (not shown).
Accordingly, the inner end surfaces of the brushes 18 and 18 are in elastic contact with the outer peripheral surface of the commutator 10.

Each of the leg pieces 1 is provided between the outer peripheral edge of the substrate portion 12 constituting the brush substrate 11 as described above and the inner peripheral surface of the upper end plate 5 fixed to the upper end opening of the case body 1.
Except for the portions where 3 and 13 are formed, the ventilation passage 21 having an arc-shaped planar shape is formed intermittently in the circumferential direction. On the other hand, a plurality of exhaust holes 22 are provided in a portion of the upper end plate 5 near the outer periphery of the intermediate portion. Further, the substrate unit 1
2 on the upper surface of the substrate portion 12 than the exhaust holes 22, 22.
An annular protruding wall 23 is provided over the entire circumference in the diametrically inner portion. Then, the upper end edge of the annular protruding wall 23 is made closer to the inner side in the diameter direction than the exhaust holes 22 on the lower surface of the upper end plate 5. Therefore, this annular protruding wall 2
A portion between the upper edge of the upper end 3 and the lower surface of the upper end plate 5 forms a labyrinth seal portion 24 having a small gap size.

When the motor for driving the blower fan of the air conditioner for an automobile configured as described above is incorporated in the air conditioner for an automobile, a portion protruding from the upper surface of the upper end plate 5 at the upper end of the rotary drive shaft 6. Then, the blower fan 25 is fixed. or,
The motor is held on a synthetic resin mounting bracket 26 except for its upper end, as shown in FIG. The mounting bracket 26 includes a holding cylinder 27, a second notch 28 formed in a part of the holding cylinder 27, and a mounting flange 29.
And Of these, the holding cylinder portion 27 is formed in a bottomed cylindrical shape whose upper end is open and whose lower end is closed. An air supply port (not shown) is provided at the lower end of the holding cylinder 27, and the blower fan is provided at an intermediate portion between the air supply port and a duct (not shown) constituting an automotive air conditioner. A portion through which the air blown out by the air flows passes through an air supply hose (not shown). Therefore, during operation of the automotive air conditioner, part of the air flowing through the duct is sent into the holding cylinder 27, and this air passes through the inside of the motor. 25
And the motor is cooled. A plurality of ridges (not shown) are formed on the inner peripheral surface of the holding cylinder 27 so as to extend in the axial direction of the holding cylinder 27. The diameter of the maximum inscribed circle of the plurality of ridges is slightly smaller than the outer diameter of the case body 1. Therefore, when the case main body 1 is pushed into the holding cylinder 27, the case main body 1 is displaced by a strong frictional force acting between the outer peripheral surface of the case main body 1 and the leading edge of each of the ridges. It is firmly held in the holding cylinder 27.

The second notch 28 is formed at the upper end edge of the holding cylinder 27 at a position corresponding to the mounting portion of the coupler 19. That is, the coupler 19 has a holder 30 entirely made of a synthetic resin into an L-shape. The holder 30 includes a vertical plate portion 31 attached to an outer peripheral surface of an upper end portion of the case main body 1, and a lateral plate protruding diametrically outward from the lower end portion of the vertical plate portion 31. A plate portion 32. The terminals 20, 20 protrude downward from the lower surface of the horizontal plate portion 32. or,
Conductive wires for conducting the terminals 20, 20 and the brushes 18, 18 are introduced into the case main body 1 through the synthetic resin constituting the holder 30.
The third notch 42 (FIG. 6) is also provided at a position where the upper edge of the case body 1 is aligned with the second notch 28.
Is formed. The holder 30 of the coupler 19 is connected to and supported by the case main body 1 by engaging a part of the vertical plate portion 31 with the third notch 42.

Further, the mounting flange 29 is formed on the outer peripheral surface of the intermediate portion of the holding cylinder 27 so as to protrude outward in the diameter direction of the holding cylinder 27. In order to mount the blower fan drive motor to which the blower fan 25 is attached to an intake unit constituting an automotive air conditioner,
The blower fan 25 is inserted into the case through a through hole provided in the bottom plate of the case constituting the intake unit. Then, the mounting flange 29 is fixed to the lower surface of the bottom plate portion with screws, rivets, or the like. A through hole 34 is formed in a part of the mounting flange 29 at a position where the mounting flange 29 is aligned with the coupler 19 to allow the upper surface and the lower surface of the mounting flange 29 to communicate with each other. With the case main body 1 of the blower fan driving motor fixed inside the holding cylinder 27, the lower portion of the coupler 19
To enter. Therefore, a connector (not shown) provided at the end of the harness for supplying electricity to the blower fan driving motor is provided below the mounting flange 29 with the through hole 34.
And connected to the coupler 19.

From the above assembled state, the terminal 2
0, 20, the conducting wire 33, the brushes 18, 18, and the commutator 10 to energize the coil of the rotor 9,
Is rotated, the blower fan 25 sucks air from the upstream end opening of the duct and blows it out of the downstream end opening into the vehicle interior. In this way, a part of the air flowing through the duct passes through the air supply hose,
The air is sent to the lower end opening of the case main body 1 and flows through the case main body 1 from the lower end opening toward the upper end opening to cool the components of the blower fan driving motor.

As described above, a large part of the air flowing upward from the bottom inside the case body 1 while cooling the constituent members is removed from the outer peripheral edge of the substrate portion 12 and the inside of the upper end plate 5. The air flows through the ventilation path 21 existing between the peripheral surface and the air, and is further discharged through the plurality of exhaust holes 22 and 22 to the inside in the diameter direction of the blower fan 25 with the help of the suction force of the blower fan 25. . Part of the air that does not pass through the ventilation path 21 flows through a gap between the inner peripheral edge of the substrate unit 12 and the outer peripheral edge of the commutator 10.

[0014]

SUMMARY OF THE INVENTION A motor for driving a blower fan of an air conditioner for an automobile, which is constructed and operates as described above, is designed to prevent water from entering the motor from the viewpoint of ensuring durability and reliability. It is hoped that it will be assured. That is, the intake unit of the vehicle air conditioner can freely select an inside air circulation mode for taking in air in the vehicle compartment and an outside air taking mode for taking in air outside the vehicle compartment. And when the outside air intake mode is selected during rainy weather or snowfall,
It is inevitable that moisture, such as raindrops, is mixed into the outside air drawn into the inner diameter side of the blower fan 25, albeit somewhat. If such moisture enters the case body 1 of the blower fan drive motor, it may cause corrosion of the components of the blower fan drive motor, or may cause a malfunction due to freezing of the movable part in cold weather. Or cause.

On the other hand, in the case of the conventional structure, the coupler 19
As shown in FIG. 7, the height of the lower edge 35 of the second notch 28 formed in a part of the holding tubular portion 27 forming the mounting bracket 26 is adjusted as shown in FIG.
The height of the upper surface of the mounting flange 29 formed on the outer peripheral surface of the nozzle 6 is substantially equal to or lower than the height of the upper surface. A projecting wall 36 is formed at a position corresponding to the second notch 28 on the upper surface of the mounting flange 29 so as to surround the through hole 34 through which the vertical plate portion 31 of the coupler 19 is inserted. It cannot always be said that the effect of preventing the entry of moisture is sufficient.

That is, when the blower fan 25 is driven to rotate in the outside air intake mode and the outside air is sucked into the inner diameter side of the blower fan 25, the raindrops mixed in the outside air climb over the protruding wall 36 to form the case body. 1 near the outer peripheral surface. A water stop plate 37 is provided around the entire periphery of the lower surface of the blower fan 25 so as to allow the water to fall downward. Reach up to. And, in this way, the case body 1
The raindrops which have reached the outer peripheral surface of the coupler 19 have a second notch 28 formed at the upper edge of the holding cylinder 27 and a third notch 42 formed at the upper edge of the case body 1, and the vertical plate of the coupler 19. It enters the case main body 1 through a gap between the case 31 and the case 31 and causes the above-described inconvenience. The motor for driving the blower fan of the automotive air conditioner of the present invention has been invented in order to eliminate such inconvenience.

[0017]

A motor for driving a blower fan of an air conditioner for an automobile according to the present invention is similar to the motor for driving a blower fan of a conventional air conditioner for a car described above. A drive motor for rotational drive,
An outer peripheral surface of an upper end portion of the driving motor, such as a mounting bracket for coupling the driving motor to a bottom surface of a case forming an intake unit of a vehicle air conditioner or a lower case forming a portion including a bottom surface of the case. A member having a flange-like portion projecting diametrically outward from the member. The driving motor includes a cylindrical case body, a lower end plate fixed to a lower end opening of the case main body, an upper end plate fixed to an upper end opening of the case main body, and the case main body. A rotation drive shaft rotatably supported by the lower bearing on the lower end of the lower end plate and the upper end plate near the upper end of the upper end plate. A rotor fixed to an intermediate portion of the shaft, a stator fixed to an inner peripheral surface of the case main body and facing the outer peripheral surface of the rotor, and an energizing coupler engaged and held at an upper edge of the case main body And Further, the mounting bracket or the lower case has a holding cylinder portion that fits and holds the case body inside thereof, and a notch formed in a portion corresponding to a mounting portion of the coupler at an upper end edge of the holding cylinder portion. A mounting flange formed on an outer peripheral surface of an intermediate portion of the holding cylinder portion so as to protrude outward in a diameter direction of the holding cylinder portion, or a bottom plate portion forming a bottom surface of the case. Then, the rotary drive shaft is used in a state where a blower fan is fixed to a portion protruding from an upper end portion of the case main body at the upper end portion. Especially,
In the motor for driving a blower fan of an automotive air conditioner according to the present invention, in use, the lower edge of the notch is prevented from entering the water through the notch more than the upper surface of the mounting flange or the bottom plate. It is positioned sufficiently high as much as possible, and an engagement groove is formed in a part of the coupler to insert a lower part of a lower end edge of the notch in a part of the holding cylinder part.

[0018]

The operation when the air taken in from the vehicle compartment or outside the vehicle compartment is fed into the duct in which the evaporator and the heater core are arranged by the motor for driving the blower fan of the vehicle air conditioner of the present invention configured as described above. Is the same as the above-described motor for driving the blower fan of the conventional automotive air conditioner.
In particular, in the case of the motor for driving a blower fan of an automotive air conditioner of the present invention, the lower end edge of the notch formed at the upper end edge of the holding cylinder portion corresponding to the mounting portion of the coupler is attached to the mounting flange. Since it is located sufficiently above the upper surface of the case, the amount of water such as raindrops that enters the case body through the gap between the notch and the coupler can be reduced.

[0019]

FIG. 1 shows a first embodiment of the present invention. The feature of the present invention is that, in the outside air intake mode, the upper end of the holding cylinder portion 27 that forms the mounting bracket 26 in order to prevent moisture such as raindrops from entering the case body 1 that forms the blower fan driving motor. The height position of the lower edge 35a of the second notch 28a (corresponding to the notch described in the claims) formed on the edge is sufficiently shifted upward, and a part of the holder 30a constituting the coupler 19a is shifted. The point is that the engagement groove 38 is formed. Since the configuration and operation of the other parts are the same as those of the above-described conventional structure, the description of the equivalent parts will be omitted or simplified, and the following description will focus on the characteristic parts of the present invention.

A second notch 28a is formed at the upper edge of the holding cylinder 27 to engage a vertical plate 31a constituting the holder 30a of the coupler 19a.
The second notch 2 is formed in a part of the holding cylinder 27.
A dam plate portion 39 is formed in a portion located below the upper surface 8a and above the upper surface of the mounting flange 29. Therefore, the upper edge of the weir plate portion 39 becomes the lower edge 35a of the second notch 28a, and the second notch 28a
The lower edge 35a of a is located above the upper surface of the mounting flange 29 by the height h shown in FIG.

On the other hand, an engaging groove 38 is formed in the middle of the lower surface of the vertical plate 31a constituting the holder 30a so that the weir plate 39 and the upper edge of the case body 1 can be inserted without any gap. I have. When the case main body 1 is pushed into the holding cylinder 27 to attach the mounting bracket 26 to the blower fan driving motor, the weir plate 39 is engaged with the engagement groove 38.
At the same time as the horizontal plate 32 of the holder 30a.
The terminals 20, 20 projecting from the lower surface of the mounting flange 29 are inserted into through holes 34 formed in the mounting flange 29.

In the case of the blower fan driving motor of the automotive air conditioner of the present invention configured as described above, it is formed at the upper end edge of the holding cylinder 27 at a portion corresponding to the mounting portion of the coupler 19a. The lower edge of the second notch 28a
The second notch 28a and the coupler 19 are located sufficiently above the upper surface of the mounting flange 29.
The amount of water such as raindrops that enters the case body 1 of the blower fan driving motor can be reduced through the gap between the vertical fan portion 31a and the vertical fan portion 31a. That is, when the blower fan 25 is driven to rotate in the outside air intake mode and the outside air is sucked into the inner diameter side of the blower fan 25, the moisture mixed in the outside air passes over the projecting wall 36 provided around the through hole 34. , To the vicinity of the outer peripheral surface of the case body 1. This water drop
The blower fan 25 collides with a water stop plate 37 provided around the entire lower surface in the middle part of the lower surface of the blower fan 25 and falls downward, or
Of the case body 1 and the outer peripheral surface of the case body 1.

In the case of the above-described conventional structure, a part of the water that has fallen downward by the water blocking plate 37 is transferred between the inner peripheral edge of the second cutout 28 and the outer peripheral edge of the vertical plate portion 31. Of the case main body 1 through the gap, but in the case of the motor for driving the blower fan of the automotive air conditioner of the present invention,
Most of the water dropped downward by the water blocking plate 37 is not blocked by the weir plate portion 39 and does not enter the case body 1. Therefore, it is possible to prevent the inconvenience caused by the entry of moisture into the case body 1, that is, the occurrence of malfunctions due to corrosion of components and freezing of moisture.

FIG. 2 shows a second embodiment of the present invention.
An example is shown. In the present embodiment, the present invention is applied to a structure in which a cut cylindrical standing wall 40 is formed on the upper surface of a mounting flange 29 constituting a mounting bracket 26. That is, the vertical wall 40 is formed on the upper surface of the mounting flange 29, and the water blocking plate 3 formed on the vertical wall 40 and the lower surface of the blower fan 25.
7 (see FIGS. 1 and 7) is slightly shifted in the diametrical direction, thereby bending a passage for water such as raindrops to reach the case main body 1 so that the water can be easily dropped downward. The reason why a part of the standing wall 40 is made discontinuous is to discharge the water dropped inside the standing wall. However, when the upright wall 40 is present in the vicinity of the second cutout 28a formed at the upper end edge of the holding cylinder 27, the water that has collided with the outer peripheral surface of the upright wall 40 and has jumped upwards, May reach the notch 28a. Therefore,
In the case of this example, by omitting a portion (the chain line portion in FIG. 2) near the second notch 28a in a part of the upright wall 40, the moisture is directed upward at the second notch 28a. Prevents jumping.

According to an experiment conducted by the present inventor, the gap 4 provided between the edge of the standing wall 40 and the protruding wall 36 in order to discharge the water entering the inside of the standing wall 40.
The width of the first and the second cutouts 2 is 10 mm.
8a from the upper surface of the mounting flange 29 to the lower edge 35a.
mm, the width dimension is 3 mm, and the lower end of the second notch 28 is aligned with the upper surface of the mounting flange 29. It was possible to reduce the amount of water entering the water to 1/200 or less.

In the illustrated example, a holding cylinder 27 for internally fitting and fixing the case main body 1 of the blower fan driving motor is provided.
It is provided independently of the case constituting the intake unit. The holding cylinder 27 and the case are connected by using the mounting flange 29 formed on the holding cylinder 27. However, the present invention is not limited to such a structure, and can be implemented in a structure in which the holding cylinder 27 is directly formed in the case. That is, the case forming the intake unit is formed by superimposing the upper case and the lower case in the middle. In the case of such a structure, the holding cylinder 27 is provided so as to form a part of the lower case and to be continuous with the bottom plate constituting the bottom surface of the case. Even with such a structure, the mounting flange 29
The present invention can be carried out in the same manner as the case shown in FIG.

[0027]

Since the motor for driving the blower fan of the automotive air conditioner according to the present invention is constructed and operates as described above,
The durability and reliability of the blower fan drive motor can be improved.

[Brief description of the drawings]

FIG. 1 is a view showing a first example of an embodiment of the present invention and corresponding to a right part of FIG. 6;

FIG. 2 is a partial perspective view of a mounting bracket showing the second example.

FIG. 3 is a half-cut side view showing a blower fan driving motor according to the invention;

FIG. 4 is a plan view seen from above in FIG. 3;

FIG. 5 is a bottom view as viewed from below.

FIG. 6 is an upper sectional view showing a state in which a blower fan is attached.

FIG. 7 is a view corresponding to the right part of FIG. 6, showing a state in which the mounting bracket is mounted.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case main body 2 Stator 3 Lower end plate 4 Air supply gap 5 Upper end plate 6 Rotation drive shaft 7 Lower slide bearing 8 Upper slide bearing 9 Rotor 10 Commutator 11 Brush substrate 12 Substrate part 13 Leg piece 14 Buffer material 15 First notch 16 Concave part 17 Brush holder 18 Brush 19, 19a Coupler 20 Terminal 21 Ventilation path 22 Exhaust hole 23 Annular projected wall 24 Labyrinth seal part 25 Ventilation fan 26 Mounting bracket 27 Holding cylinder part 28, 28a Second notch 29 Mounting flange 30, 30a Holder 31, 31a Vertical plate portion 32 Horizontal plate portion 33 Conductor wire 34 Through hole 35, 35a Lower edge 36 Projecting wall 37 Water blocking plate 38 Engaging groove 39 Weir plate portion 40 Standing wall 41 Gap 42 Third cutout

Claims (1)

[Claims] 1. A driving motor for rotating a blower fan of an automotive air conditioner, and a mounting bracket for connecting the driving motor to a bottom surface of a case constituting an intake unit of the automotive air conditioner. A lower case forming a portion including a bottom surface of the case; a driving motor of which includes a cylindrical case body, a lower end plate fixed to a lower end opening of the case body, and an upper end of the case body; The upper end plate fixed to the opening and the central part of the case body are inserted through the lower end of the case body, and the lower end plate is rotated by the lower bearing. A rotating drive shaft freely supported, a rotor fixed to an intermediate portion of the rotating drive shaft, and a stator fixed to an inner peripheral surface of the case body and facing an outer peripheral surface of the rotor An energizing coupler engaged and held at an upper edge of the case main body, wherein the mounting bracket or the lower case fits and holds the case main body inside the holding main body, and the holding cylindrical portion. A notch formed at a portion corresponding to the mounting portion of the coupler at the upper edge of the outer peripheral surface of an intermediate portion of the holding cylinder portion,
A mounting flange formed so as to protrude diametrically outward of the holding cylinder portion or a bottom plate portion forming a bottom surface of the case, and protruding from an upper end portion of the case main body at an upper end portion of the rotary drive shaft. In a blower fan drive motor of an air conditioner for an automobile used in a state where a blower fan is fixed to a portion, a lower end edge of the notch is located above an upper surface of the mounting flange or a bottom plate portion in a use state. Let me
A motor for driving a blower fan of an automotive air conditioner, wherein an engagement groove for inserting a lower part of a lower end edge of the notch in a part of the holding cylinder part is formed in a part of the coupler.