JP3417810B2 - Duct ventilation fan - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a duct ventilation fan provided with a connector for connecting a power supply wire inside a motor of a blower.

[0002]

2. Description of the Related Art Conventionally, in duct ventilation fans,
As shown in FIG. 17, a blower 2 is provided in the main body frame 1. The blower 2 includes a motor 3 and a blower blade 4 that is rotationally driven by the motor 3, and the motor 3 has a frame 5 outside the main frame 1 (see FIG. 18). The opening 6 is provided on the side surface of the portion located on the upper side, and the connector 7 is provided inside facing the opening 6.

In the connector 7, the power supply wire 8 has a body frame 1
It is connected by being inserted from the outside through the opening 6, and in particular, for example, a so-called SL (screw) which holds the power supply wire 8 at the same time as it is inserted and chucked and held in a connected state without screwing. (Less terminal), and is integrally provided, for example, on a mounting plate 10 to which a capacitor 9 required for operating the motor 3 is mounted.

Further, the mounting plate 10 has mounting legs 11, and the mounting legs 11 are mounted by being inserted into some slots (not shown) in which the coils 13 of the stator core 12 are inserted. Further, the mounting plate 10 has a connecting portion (also not shown) that conducts with the connector 7 and the capacitor 9, and the coil 13 is provided at this connecting portion (also not shown).
The ends of are connected. Thus, when the mounting plate 10 is mounted, there are gaps between the mounting plate 10 and the stator core 12 and between the frame 5.

[0005]

In the case of the above, the disconnection of the power supply wire 8 is performed by pulling out the power supply wire 8 from the outside of the main body frame 1 as shown by the arrow A in FIG. In the case where 7 is composed of a quick-connect terminal as described above, the power source wire 8 can be pulled out while holding the power source wire 8 by pressing a release button (not shown) from outside the body frame 1 with a tool such as a screwdriver. Done by Further, the power supply wire 8 is connected by pushing the power supply wire 8 into the connector 7 as shown by an arrow B.

On the other hand, the connector 7 is not firmly fixed in the motor 3, and the wobbling of the mounting plate 10 causes the connector 7 to move together with the mounting plate 10.
Therefore, an unreasonable force is applied to the connecting portion between the connecting portion of the mounting plate 10 and the end portion of the coil 13, which may cause disconnection.

When the whole ventilation fan is removed, the main frame 1
18 is pulled downward, so that
As shown by an arrow A ', the same force as that at the time of pulling out is applied. Therefore, even when the entire ventilation fan is removed, an unreasonable force may be applied to the wire connecting portion of the mounting plate 10 with respect to the coil 13, which may cause disconnection.

The present invention has been made in view of the above circumstances. Therefore, firstly, an object of the present invention is to pull out a power supply wire from a connector provided inside a motor of a blower or to remove an entire ventilation fan. Another object of the present invention is to provide a duct ventilation fan that does not apply an unreasonable force to the wire connection portion and eliminates the risk of disconnection. The second object of the present invention is to
An object of the present invention is to provide a duct ventilation fan that can eliminate the risk of disconnection without pushing the wire connection portion unnecessarily when pushing the power supply wire into the connector.

[0009]

In order to achieve the above first object, a duct ventilation fan of the present invention comprises a motor and a fan blade rotatably driven by the motor in a main body frame, and the fan is provided inside the motor. A power wire connecting connector, which is inserted into an opening for inserting the power wire facing the connector of the motor, and engages with an edge portion of the opening at a position where the tip end contacts the connector. It is characterized in that it has a bush having an engaging portion. According to this one,
It is possible to prevent the connector from being stopped by the bush against the force at the time of pulling out the power supply wire or at the time of removing the entire ventilation fan, and avoid applying an unreasonable force to the wire connection portion.

Further, in order to achieve the second object, the duct ventilation fan of the present invention is inserted into an opening for inserting a power supply wire which faces the connector of the motor, and is used for pushing the power supply wire.
On the other hand , a bush having an arm portion for holding the connector is provided. According to this structure, it is possible to prevent the connector from being stopped by the bush against the force applied when the power supply wire is pushed, and to apply an unreasonable force to the wire connection portion.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS. First, FIG. 4 shows a ceiling 22 of a room 21, and a mounting port 23 is formed on the ceiling 22. A main body frame 24 is inserted into the mounting port 23 from the inside of the room 21 to a rear portion of the ceiling 22 and mounted. There is.

The main body frame 24 is in the shape of a rectangular box, the lower surface of which is open, and an exhaust port 25 is provided in the side wall portion located behind the ceiling 22. An exhaust port body 26 is attached to the exhaust port 25 outside the main body frame 24, and a duct 27 is connected to the exhaust port body 26.

A motor 28 is attached to the main body frame 24 approximately at the center of the upper wall.
A blower blade 30 is attached to the blower blade 9, and the blower blade 30 is arranged in the main body frame 24. Further, a partition plate 32 having a bellmouth-shaped intake port 31 facing the blower blades 30 is attached to the lower portion of the main body frame 24, and thus the blower 3 is provided.
Make up three. In addition, the main frame 24 is attached to the ceiling 22.
A porous decorative frame 34 is attached to cover the open portion of the lower surface of the.

FIG. 5 shows the structure of the motor 28 in detail. Inside the frame 37 consisting of the upper frame 35 and the lower frame 36, the stator 38 and the rotor 39 are provided.
And a bearing 4 for supporting the rotary shaft 29.
0 and 41 are installed internally. The stator 38 is the core 4
2 and coil 4 housed in its slot (not shown)
3 and the mounting plate 4 is provided in some of the slots.
4 is inserted and attached by the attachment leg 45.

A capacitor 46 necessary for the operation of the motor 28 is mounted on the mounting plate 44, and the connector 4
7 are integrally provided, for example. The connector 47 is connected by inserting the tip portion (conductor wire 48b) of the power supply wire 48 from which the insulating coating 48a is removed, and is particularly a quick-connect terminal, so-called SL (screwless) terminal.

For this reason, as shown in FIG. 1, the connector 47 has an insertion hole 49 for inserting the power supply wire 48 (conductor wire 48b), and the power supply wire 48 is chucked at the same time as being inserted into a connected state. It has a holding structure (not shown) for holding it, and further, as shown in FIG. 2, has a release button 50 in the center between the insertion holes 49 in the front part. Tool (also not shown)
By pressing with, the holding of the power supply wire 48 by the holding structure is released. In addition, the mounting plate 44 has a connection portion (also not shown) that is electrically connected to the capacitor 46 and the connector 47, and the end portion of the coil 43 is connected to this.

On the other hand, on the side surface of the upper frame 35 located outside (upper) the main frame 1 of the motor 38, an opening 51 is formed facing the connector 47 for inserting the power supply wire 48. ing. The opening 51 is a horizontally long rectangle, and the bush 52 is inserted therein. As shown in FIG. 3, the bush 52 is formed of an insulating material such as plastic in the shape of a horizontally long rectangular tube similar to the opening 51, and has a wall portion 53 surrounding the power supply wire 48 all around. Have The bush 52 has a collar portion 54 at one end of the wall portion 53, and claw portions 55 as engaging portions are formed on the upper and lower portions of the wall portion 53 near the collar portion 54.

With this structure, as shown in FIG. 1, in the bush 52, the wall portion 53 is inserted into the opening portion 51 from the other end portion on the side opposite the flange portion 54, and the claw portion 55 is made to pass over the opening portion 51. The opening 51 is engaged with the edge of the back side (the inner surface side of the upper frame 35). As a result, the tip end of the wall portion 53 is in contact with the outer end surface 47a of the connector 47, so that the tip end portion of the bush 52 is the outer end surface 47 of the connector 47.
The claw portion 55 is fixed by engaging the claw portion 55 with the edge portion of the opening portion 51 at a position where it abuts against a.

Now, the bush 5 mounted as described above.
A power supply wire 48 (conductor wire 48 b) is inserted into the connector 2, and its tip is inserted into the insertion hole 49 of the connector 47. Then, the connector 47 is connected to the inserted power supply wire 48 as described above.
Chuck and hold in the connected state.

Then, with the power supply wire 48 connected,
When a switch (not shown) is turned on, the motor 28 is energized by the power supply wire 48 to rotate and drive the blower blade 30, and the driven blower blade 30 separates the air in the room 21 from the decorative frame 34 by the partition plate. The gas is sucked into the main body frame 24 through the intake port 31 of 32 and is exhausted from the exhaust port 25
And it is discharged to the outside through the duct 27.

In order to fold the connection of the power supply wire 48, the power supply wire 48 is pulled out from the outside of the main body frame 24 as shown by an arrow C in FIG. In the case of the configuration, the release button 50 is pressed from the outside of the main body frame 24 with a tool such as a screwdriver to release the holding of the power supply wire 48, and the power supply wire 4 is released.
Pull out 8.

Then, the connector 47 is also pulled in the pulling-out direction, but in the above-mentioned case, the bush 52 has its tip portion abutted in that direction, and the bush 52 itself is also the motor by the claw portion 55. Since it is prevented from coming off by engaging with the edge of the opening 51 of the 28, these prevent the connector 47 from moving in the pulling-out direction of the power supply wire 48, and the mounting plate 44 also does not move.
Thus, it is possible to avoid applying an unreasonable force to the connecting portion between the connecting portion of the mounting plate 44 and the end portion of the coil 43, and to eliminate the possibility of disconnection.

Further, when the whole ventilation fan is removed, the main body frame 24 is pulled downward, so that the power wire 48 receives a force similar to that at the time of pulling out as shown by an arrow C'in FIG. However, the bush 52 functions in the same manner as described above. Therefore, also in this case, the connector 47
Is prevented from moving in the direction of pulling out the power wire 48,
Since the mounting plate 44 also does not move, it is possible to avoid applying an unreasonable force to the connecting portion between the connecting portion of the mounting plate 44 and the end portion of the coil 43, and it is possible to eliminate the possibility of disconnection. The engaging portion provided on the bush 52 may be a concave portion into which the edge portion of the opening 51 of the motor 28 fits instead of the claw portion 55.

In contrast to the above, FIGS. 6 to 16 show the second to ninth embodiments of the present invention, and only the points that are different from the first embodiment will be described below. First, in the second embodiment shown in FIGS. 6 and 7, the bush 52
Further, instead of providing the above-mentioned claw portion 55, the arm portion 56 is integrally extended further from the tip end portion of the wall portion 53 to the further front side.
The arm portion 56 exists on the left and right or the upper and lower sides (in this case, left and right) of the wall portion 53, and each has a rectangular hole 57 that is an engaging portion. Further, the end face 5 is provided at the tip of the wall 53.
8 is left on all four sides.

The connector 47 is provided with the arm portion 56.
Corresponding to the holes 57, rectangular protrusions 59, which are engaged parts, are formed on both left and right side surfaces. With this configuration, the bush 52
Is inserted into the opening 51 from the tip of the arm 56, and the wall 53
The end surface 58 of the connector 47 is brought into contact with the outer end surface 47a of the connector 47, and the hole 57 of the arm portion 56 is inserted into the convex portion 59 of the connector 47.
, So that the arm 47 holds the connector 47.

In this case, the power wire 48 shown by the arrow D
The bush 52 prevents the movement of the connector 47 at the tip edge portion 57a of the hole 57 of the arm portion 56 against the pushing force at the time of connection. Thus, also in this case, it is possible to avoid applying an unreasonable force to the connecting portion between the connecting portion of the mounting plate 44 and the end portion of the coil 43, and it is possible to eliminate the possibility of disconnection.

Further, in particular, in the above-mentioned structure in which the connector 47 is composed of a quick-connect terminal, the release button 50 is pressed by a tool such as a screwdriver when the connection of the power supply wire 48 is released. Against the above bush 5
The second arm portion 56 has a tip edge portion 57a of the hole 57,
Block 7 movement. Thus, also in this case, it is possible to avoid applying an unreasonable force to the connecting portion between the connecting portion of the mounting plate 44 and the end portion of the coil 43, and it is possible to eliminate the possibility of disconnection.

Next, in the third embodiment shown in FIG.
Slopes 60 are formed as guides on the sides of the projections 59 of the connector 47 facing the openings 51, respectively. As a result, when the bush 52 is inserted, the arm portion 56 becomes
The protrusion 59 can easily get over the convex portion 59 by being expanded along with, and the insertion force of the bush 52 can be reduced accordingly, and the mountability of the bush 52 can be improved.

Further, in the fourth embodiment shown in FIG. 9, a curved chamfered portion 61 as a guide portion is formed inside the tip portion of the arm portion 56 of the bush 52. Even in this case, when the bush 52 is inserted, the arm portion 56 is chamfered by the chamfered portion 61.
By coming into contact with 9, the convex portion 59 can be easily spread over the convex portion 59, and the insertion force of the bush 52 can be reduced correspondingly, and the mountability of the bush 52 can be improved.

In this case, the chamfered portion 61 may be formed by changing to an inclined surface. Further, by providing these chamfered portions and slopes on both the arm portion 56 of the bush 52 and the convex portion 59 of the connector 47, the insertion force of the bush 52 can be further reduced, and the attachability of the bush 52 can be improved. Can be further improved.

In the fifth embodiment shown in FIGS. 10 and 11, the split portions 62 are formed at the tips of the arm portions 56 of the bush 52. By doing so, the arm portion 56 is easily bent outward of the convex portion 59 of the connector 47 and is also flexed in the vertical direction of the convex portion 59, so that the convex portion 59 of the connector 47 is inserted when the bush 52 is inserted. As it easily crosses the portion 59, the bush 5
The insertion force of 2 can be reduced, and the attachability of the bush 52 can be improved.

In the sixth embodiment shown in FIG. 12, with respect to the arm portion 56 of the bush 52 having the cut-off portion 62 formed at the tip thereof, the protrusions 59 of the connector 47 are guided to the sides facing the openings 51, respectively. A slope 63 as a part is formed. By doing so, when the bush 52 is inserted, the arm portion 56 spreads outward along the slope 63 in the outward direction of the convex portion 59, so that the convex portion 59 can be easily overcome. The insertion force of the bush 52 can be reduced, and the attachability of the bush 52 can be improved.

In the seventh embodiment shown in FIG. 13, the arm portion 56 of the bush 52 having the cutout portion 62 formed at the tip thereof is provided with slopes as guide portions above and below the convex portions 59 of the connector 47. 64 are formed. With this configuration, when the bush 52 is inserted, the arm portion 56 is expanded along the inclined surface 64 in the vertical direction of the convex portion 59, so that the convex portion 59 can be easily crossed. The insertion force of the bush 52 can be reduced, and the attachability of the bush 52 can be improved.

In the eighth embodiment shown in FIG. 14, inclined surfaces 65 are formed as guide portions on the inner sides of the tip portions of the arm portions 56 of the bush 52 on both sides of the cutout portion 62. Even in this case, when the bush 52 is inserted, the arm portion 56 is in contact with the convex portion 59 at the inclined surface 65, so that the convex portion 59 is expanded in the vertical direction and easily crosses the convex portion 59. It is possible to reduce the insertion force of the bush 52 and improve the mountability of the bush 52.

In the ninth embodiment shown in FIGS. 15 and 16, the bush 52 is provided outside the collar portion 54,
Similarly to the wall portion 53, the outer wall portion 6 surrounding the entire circumference of the power supply wire 48.
6, and a lid 68 is formed on the upper edge of the outer wall 66 by connecting with a thin self-hinge portion 67. The lid 68 closes the opening 69 of the bush 52 facing the connector 47 (in this case, the opening of the outer wall portion 66) by being rotated from the self-hinge portion 67 as shown by the arrow E. Tongue pieces 70 are provided on both left and right sides, and holes 71 that are engaging portions formed on the tongue pieces 70 are engaged with projections 72 that are engaged portions formed on both left and right outer surfaces of the outer wall portion 66. It is adapted to be held in the closed state as described above. The lid 68 has the power supply wire 4 in the closed state.
A notch portion 73 and a knob portion 74 for passing 8 are also formed.

With this structure, the power supply wire 48 is connected to the connector 47.
When the lid 68 is rotated as described above after being inserted into and connected to the plug 68, the lid 68 closes and holds the opening 69 of the bush 52 with the power wire 48 inserted through the notch 73. With this, it is possible to prevent dust from entering the inside of the motor 28 from the bush 52, and at the same time, in addition to the power supply wire 48,
It is also possible to prevent the finger from touching the charging part in the state where the connector is connected to the connector 47.

In addition, in any of the above embodiments,
The bush 52 has a wall portion 53 that covers the power supply wire 48 on the entire circumference. With this, the inside of the motor 28 can be kept in a sealed state in a state of being joined to the connector 47, so that a flame may be generated inside the motor 28. Even if it happens, the spread of fire can be kept small in the motor 28 and the spread of fire can be avoided.

The connector 47 is not limited to the quick-connect terminal, but may be an ordinary connector having no function of chucking the inserted power supply wire 48. In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and may be appropriately modified and implemented without departing from the scope of the invention.

[0039]

The present invention is as described above,
It has the following effects. According to the duct ventilation fan of claim 1, when the power supply wire is pulled out from the connector provided inside the motor of the blower or when the entire ventilation fan is removed,
Since the connector is stopped by the bush, it is possible to prevent unreasonable force from being applied to the electric wire connecting portion and eliminate the possibility of disconnection.

According to the duct ventilation fan of claim 2, when the power source electric wire is pushed into the connector, the connector is prevented from moving by the bush, so that an unreasonable force is not applied to the electric wire connecting portion, and the wire is disconnected. It is possible to eliminate the fear of. According to the duct ventilation fan of the third aspect, the bush can be easily attached. The duct ventilation fan according to the fourth aspect can also improve the attachability of the bush.

According to the duct ventilation fan of claim 5, even if a flame is generated in the motor, the fire can be spread in a small amount in the motor, and the fire can be spread to others. Can be avoided. According to the duct ventilation fan of claim 6, it is possible to prevent dust from entering the inside of the motor from the bush, and at the same time, to prevent a finger from touching the charging part in a state where the power supply wire is connected to the connector. be able to.

[Brief description of drawings]

FIG. 1 is an enlarged vertical sectional view of a main part showing a first embodiment of the present invention.

[Figure 2] Front view of a single connector

FIG. 3 is a perspective view of the bush alone.

FIG. 4 is a vertical cross-sectional view of the entire ventilation fan in a mounted state.

FIG. 5 is an enlarged vertical sectional view of a motor part.

FIG. 6 is an enlarged cross-sectional view of a main part showing a second embodiment of the present invention.

FIG. 7 is an exploded perspective view of main parts

FIG. 8 is a view corresponding to FIG. 6 showing a third embodiment of the present invention.

FIG. 9 is a view corresponding to FIG. 6 showing a fourth embodiment of the present invention.

FIG. 10 is a view corresponding to FIG. 1 showing a fifth embodiment of the present invention.

FIG. 11 is a view corresponding to FIG.

FIG. 12 is a view corresponding to FIG. 9 showing a sixth embodiment of the present invention.

FIG. 13 is a partial equivalent view of FIG. 1 showing a seventh embodiment of the present invention.

FIG. 14 is a view corresponding to FIG. 13 showing an eighth embodiment of the present invention.

FIG. 15 is an exploded perspective view of a motor and a power supply wire showing a ninth embodiment of the present invention.

16 is a view equivalent to FIG.

FIG. 17 is a view corresponding to FIG. 4 showing a conventional example.

FIG. 18 is a view corresponding to FIG.

[Explanation of symbols]

24 is a main frame, 28 is a motor, 30 is a blower blade, 44 is a mounting plate, 47 is a connector, 48 is a power supply wire, 51 is an opening, 52 is a bush, 53 is a wall, 55 is a claw (engaging part). ), 56 is an arm portion, 57 is a hole (engaging portion), 58 is an end surface,
59 is a convex portion (engaged portion), 60 is an inclined surface, 61 is a chamfered portion,
62 is a separating part, 63, 64 and 65 are slopes, 68 is a lid, 6
9 is an opening, 71 is a hole (engaging part), 72 is a protrusion (engaged part), and 73 is a notch.

Claims (6)

(57) [Claims] 1. A body frame comprising a motor and a blower blade rotatably driven by the motor, and a connector for connecting a power source wire inside the motor, wherein the power source wire is inserted through the connector of the motor. A ventilation fan for a duct, comprising a bush having an engaging portion that is inserted into the opening portion and that engages with an edge portion of the opening portion at a position where the tip portion comes into contact with the connector. 2. A body frame comprising a motor and a blower blade rotatably driven by the motor, and a connector for connecting a power source wire inside the motor, wherein the power source wire facing the connector of the motor is inserted. A ventilation fan for a duct, comprising a bush having an arm portion that is inserted into the opening and holds a connector against pushing of a power supply wire . 3. The connector has an engaged portion with which the arm portion of the bush engages, and the inclined portion for the arm portion of the bush to ride over the engaged portion is formed on the engaged portion. Ventilation fan for duct described in 2. 4. The ventilation fan for a duct according to claim 2, wherein the bush has a cutout portion at a tip portion of the arm portion. 5. The duct ventilation fan according to claim 1 or 2, wherein the bush has a wall portion covering the power supply wire on the entire circumference. 6. The duct ventilation fan according to claim 1, wherein the bush has a lid that closes the opening facing the connector when the power supply wire is inserted.