JP3090449B2 - Motor rotation position detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor rotational position detecting device for detecting a rotational position of a drive motor used for a power window of an automobile, for example.

[0002]

2. Description of the Related Art As a power window, there is a so-called jam protection power window for preventing foreign matter from being caught.

In this power window, the window glass moves up (moves in the closing direction) and descends (moves in the opening direction) due to the forward and reverse rotation of the armature of the drive motor. When a foreign object is caught between the window glass and the upper edge of the window frame during the ascent of the window glass, a lock current is generated in the drive motor. Due to the generation of the lock current, the window glass stops rising and immediately descends, thereby preventing foreign matter from being caught.

Therefore, when the window glass is closed, it is necessary to complete the closing without performing the pinching prevention operation even if a lock current is generated.

Therefore, a motor output shaft of the armature of the drive motor is provided with a plurality of pole magnets having different poles in the rotation direction, and a Hall IC is mounted on the fixed side of the drive motor corresponding to the magnet. With the rotation of the armature, a pulse is sent from the Hall IC to the ECU (or CPU).
Emitted to

According to the ECU, the pulse signal is counted up in accordance with the rotation of the armature in the ascending direction of the window glass.
Conversely, the count is down-counted with the rotation of the armature in the window glass downward direction, and the position of the window glass is detected by the pulse count number.

When the lock current is generated due to the rising of the window glass, as long as the pulse count does not reach the preset pulse count n, the anti-jamming operation is performed by the generation of the lock current, and the pulse The count number is
After reaching the pulse count number n, the pinch prevention operation is not performed even if the lock current is generated. That is,
After the pulse count number n, a dead zone in which the closing operation of the window glass can be normally performed without performing the anti-jamming operation.

[0008]

By the way, such a Hall IC is usually provided in the housing of the drive motor. However, the assembling work of the Hall IC in a narrow and limited space such as the housing is difficult. It is complicated, and it is difficult to improve the positional accuracy of the Hall IC due to the complicated workability in the assembling process.

The present invention has been made in view of the above-described circumstances, and has as its object to provide a motor rotational position detecting device which can improve the assemblability of a magnetic sensor such as a Hall IC and further improve the positional accuracy of such a magnetic sensor. It is.

[0010]

According to a first aspect of the present invention, there is provided an output shaft which is orthogonal to an axial direction of a rotating shaft on which a worm is formed, and which is provided coaxially with a helical gear which meshes with the worm. A motor rotation position detection device for detecting a rotation position of a motor, wherein the rotation position detection device is provided on the rotation shaft, and has a plurality of poles in which different poles are alternately arranged along a rotation direction of the rotation shaft, and rotates with the rotation shaft. The magnet overlaps with the rotating shaft when viewed from the axial direction of the output shaft.
A magnetic sensor that faces the magnet in a state where the armature is assembled and emits a pulse with the rotation of the armature , and is provided outside the housing that houses the rotation shaft and the helical gear and along the axial direction of the output shaft. Previous
A case that is assembled to the housing and holds the substrate while at least a part of the substrate is housed therein .

In the motor rotational position detecting device having the above-described structure,
Outside the housing that houses the rotating shaft and helical gear
The case is assembled, and the board is
All or part (ie, at least part) of
The magnetic sensor mounted on the board
A pulse is emitted with the rotation, and based on the occurrence of the pulse,
The rotation position and the like of the motor are detected.

Further , in the present motor rotational position detecting device,
At least a part of the board is housed in the case and the board is
Hold it to position the board relative to the case, i.e.
The positioning of the magnetic sensor attached to the board is completed
I do. Therefore, the positioning of the case with respect to the housing
The position of the magnetic sensor with respect to the housing.
Can be installed in the assembly process.
Workability is improved.

Here, the case is provided on the outside of the housing.
In addition, it is mounted on the side of the output shaft facing the axial direction,
Moreover, this case is viewed from the direction along the output shaft.
Assembled to the housing. That is, this motor rotation
For the position detection device, assemble the case and assemble the board
The injury will be along the axial direction of the output shaft. In this way,
Unify the assembly directions of the components of the rotor position detector
As a result, the assemblability can be improved, and
Automatically set only with the translocation detection device in the machine of the assembling device, etc.
Even if you try to assemble, assemble by unifying the assembly direction
The configuration of the device can be simplified.

On the other hand, a magnetic sensor is provided on the substrate.
Due to the relationship, the board must be located on the side of the magnet
However, in the present invention, the installation
Among them, in particular, overlap with the rotation axis along the axial direction of the output shaft.
Substrates are provided to meet each other.

It has an output shaft as used in the present invention
Helical gears usually have a thickness direction along this axial direction.
Therefore, motors using such helical gears and
When thinning actuators that use motors
Inevitably, the axial direction of the helical gear is
It is effective to do.

Here, in the present invention, along the axial direction of the output shaft,
The substrate is provided so as to overlap with the rotation axis,
The thickness direction of the substrate is roughly the axial direction of the output shaft, or
The thickness direction of the substrate is inclined with respect to the axial direction of the output shaft.
However, the inclination angle is relatively small. For this reason, the board
Even if the area of the front and back surfaces is not extremely reduced, its thickness
The direction becomes closer to the thickness direction (axial direction) of the helical gear.
Therefore, it does not hinder the thinning of motors and actuators.
No.

Further , the board in the case after assembly is
Rattling is prevented, and the sensor is
Thing is obtained and reliability is increased.

According to a second aspect of the present invention, a rotational position of a motor having an output shaft which is orthogonal to an axial direction of a rotating shaft on which a worm is formed and which is provided coaxially with a helical gear meshing with the worm is detected. A motor rotation position detection device, wherein the plurality of poles are provided on the rotation shaft and different poles are alternately arranged along a rotation direction of the rotation shaft,
A magnet that rotates with the rotating shaft,
A housing that constitutes a housing that accommodates the rotating shaft and the helical gear, and a magnetic sensor that faces the magnet in a state where it is mounted on a substrate that overlaps with the rotating shaft when viewed from the axial direction, and that emits a pulse as the armature rotates. A case wall integrally formed with the housing wall on a side of the wall facing the axial direction of the output shaft , wherein the base is housed with at least a part of the substrate housed therein
And a case for holding the plate .

In the motor rotational position detecting device having the above configuration,
A housing housing the rotating shaft and helical gear inside
The housing wall that composes the case wall that composes the case
Integrally formed, including this case wall
All or part of the board (ie,
At least a part of the magnet)
The rotation of the rotating shaft (that is, the rotation of the magnet)
)), A pulse is emitted, and based on the occurrence of the pulse,
The rotation position and the like of the motor are detected.

Also, in this motor rotational position detecting device,
At least a part of the board is housed in the case and the board is
Hold it to position the board relative to the case, i.e.
The positioning of the magnetic sensor attached to the board is completed
I do.

Here, the case wall constituting the case is
The axial direction of the output shaft in the housing wall that constitutes the housing
Integrated with the housing wall facing the
Is installed in the case along the axial direction of the output shaft.
Source. Thus, the motor rotation
The assembly direction of the helical gear and the components of the position detector is integrated.
By doing so, the assemblability can be improved and
Automatically assembles the motor rotation position detection device with a machine such as an assembly device.
Even if you try to find it, unify the assembly direction
Thus, the configuration of the assembling apparatus can be simplified.

Further, in this motor rotational position detecting device,
The case wall that constitutes the case is integrated with the housing wall
The space inside the case is wide,
The degree of freedom increases. That is, the magnetic sensor is held and accommodated.
Case to the housing wall with screws or caulking.
There is no need to be constant, not a required screwing portion and a caulking portion and the like
The space inside the case can be widened and the board can be enlarged.
The magnetic sensor can be easily mounted.

The case wall is integrated with the housing wall.
Cause the case to rattle or come off
No fear. And the assembling accuracy is improved,
The sensing of the magnetic sensor can be obtained, and the reliability increases.

Further, the case wall is integrated with the housing wall.
Makes it unnecessary to use screws for fixing the case.
Therefore, the number of parts can be reduced.

In addition, the mounting of the board in the case after the assembly is performed.
Sticking is prevented, and the sensor with a more reliable magnetic sensor
And reliability is increased.

On the other hand, a magnetic sensor is provided on the substrate.
Due to the relationship, the board must be located on the side of the magnet
However, in the present invention, the installation
Among them, in particular, overlap with the rotation axis along the axial direction of the output shaft.
Substrates are provided to meet each other.

Having an output shaft as used in the present invention
Helical gears usually have a thickness direction along this axial direction.
Therefore, motors using such helical gears and
When thinning actuators that use motors
Inevitably, the axial direction of the helical gear is
It is effective to do.

Here, according to the present invention, along the axial direction of the output shaft.
The substrate is provided so as to overlap with the rotation axis,
The thickness direction of the substrate is roughly the axial direction of the output shaft, or
The thickness direction of the substrate is inclined with respect to the axial direction of the output shaft.
However, the inclination angle is relatively small. For this reason, the board
Even if the area of the front and back surfaces is not extremely reduced, its thickness
The direction becomes closer to the thickness direction (axial direction) of the helical gear.
Therefore, it does not hinder the thinning of motors and actuators.
No.

According to the third aspect of the present invention, a worm is formed.
Perpendicular to the axial direction of the rotating shaft
Has an output shaft provided coaxially with the meshing helical gear
Motor rotational position detecting device for detecting the rotational position of the rotating motor
A rotating shaft provided on the rotating shaft,
It is a plurality of poles in which different poles are alternately arranged along the rotation direction of the shaft,
A magnet rotating with the rotating shaft;
Assemble on a substrate that is arranged across the rotation axis in the circumferential direction of rotation.
The armor faces the magnet in the attached state,
A magnetic sensor that emits a pulse in accordance with the rotation of the
Outside the housing that houses the turning shaft and the helical gear
Side from the axial direction of the output shaft, inside the
A case accommodating at least a part of the substrate, and the case
Provided when the substrate is accommodated in the case.
The board can be engaged from the direction along the axial direction of the output shaft
And an engaging portion for supporting the substrate in an engaged state.
It is characterized by:

In the motor rotational position detecting device having the above structure,
Outside the housing that houses the rotating shaft and helical gear
The case is assembled, and the board is
All or part (ie, at least part) of
The magnetic sensor mounted on the board
A pulse is emitted with the rotation, and based on the occurrence of the pulse,
The rotation position and the like of the motor are detected.

Also, in the present motor rotational position detecting device,
The base is provided with an engagement portion, and at least a part of the substrate is provided.
If the board is engaged with the engaging portion while the
Positioning, that is, the magnetic sensor attached to the substrate
The positioning of the sensor is completed. In this way, the board is
Assembling including positioning of magnetic sensor just by engaging
Since injuries can be made, workability in the assembling process is improved.

Here, the case is output to the outside of the housing.
It is assembled from the axial direction of the shaft.
The engagement part formed on the shaft is in the direction along the axial direction of the output shaft.
Can be engaged with the substrate. That is, this motor rotation position
In the detection device, the assembly of the assembling and the substrate of the case
It follows the axial direction of the output shaft. Thus, the motor
Unifying the assembly directions of the components of the rotational position detector
In addition to improving the assemblability, for example,
The position detection device is automatically assembled by a machine such as an assembly device.
Even if you try, the assembly direction is unified,
Can be simplified.

Further, the board in the case after assembly is
Rattling is prevented, and the sensor is
Thing is obtained and reliability is increased.

Further, the substrate thus assembled
Straddles this rotating shaft in the circumferential direction of the rotating shaft of the armature.
And the engaging part is mounted on the board with the board straddling the rotation axis.
Can be held. In this way, the substrate
In this state, the engaging portion can hold the substrate.
In this motor rotation position detection device,
If the specifications of the device are changed,
The advantage is that the substrate can be reused even if the number of sensors increases or decreases.
There is a

That is, for example, a structure having one magnetic sensor is used.
After mounting, attach multiple magnetic sensors to the
Change to a specification that generates signals with different phases from the sensor
In consideration of this, the magnetic sensor
Separated from each other, and from the magnet to each magnetic sensor
Must be approximately equal.

Here, in a configuration in which the substrate does not straddle the rotation axis,
Is to provide a board for each magnetic sensor,
It will be necessary to change the design of the installation position of the board and the engagement part.
You.

On the other hand, the present motor rotational position detecting device
Now, we need to place each magnetic sensor in the area that spans the rotation axis.
To separate the magnetic sensors from each other in the circumferential direction of the rotating shaft,
Moreover, the distance from the magnet to each magnetic sensor is approximately equal
Change the wiring on the board.
And the engaging portion can be diverted as it is. This
Like increasing or decreasing the number of such magnetic sensors
Changes the basic structure even when making design changes
Design change is easy, and
It is possible to divert the body, so if the cost is reduced,
Since the basic structure does not need to be changed,
The position accuracy of the sensor can be easily obtained.

According to the present invention, a worm is formed.
Perpendicular to the axial direction of the rotating shaft
Has an output shaft provided coaxially with the meshing helical gear
Motor rotational position detecting device for detecting the rotational position of the rotating motor
A rotating shaft provided on the rotating shaft,
It is a plurality of poles in which different poles are alternately arranged along the rotation direction of the shaft,
A magnet rotating with the rotating shaft;
Assemble on a substrate that is arranged across the rotation axis in the circumferential direction of rotation.
The armor faces the magnet in the attached state,
A magnetic sensor that emits a pulse in accordance with the rotation of the
A housing for accommodating the rotating shaft and the helical gear;
Of the formed housing wall is oriented in the axial direction of the output shaft.
Having a case wall integrally formed with the side housing wall,
Outside the housing and in the axial direction of the output shaft.
Open to accommodate at least a portion of the substrate inside
A case and a case provided on the case and in front of the case.
When accommodating the substrate, from the direction along the axial direction of the output shaft
The substrate is engageable and supports the substrate in the engaged state
And an engaging portion.

In the motor rotational position detecting device having the above structure,
A housing housing the rotating shaft and helical gear inside
The housing wall that composes the case wall that composes the case
Integrally formed, including this case wall
All or part of the board (ie,
At least a part of the magnet)
The rotation of the rotating shaft (that is, the rotation of the magnet)
)), A pulse is emitted, and based on the occurrence of the pulse,
The rotation position and the like of the motor are detected.

Here, in this motor rotational position detecting device,
When the case is open to the outside of the housing,
In addition, the case is provided with an engagement
At least the board from the mouth side, that is, from the outside of the housing
Ask also engaging the substrate engaging portion while receiving a portion of the case
Substrate positioning, i.e., the magnetic
The positioning of the air sensor ends. Thus, the engagement part
Including positioning of the magnetic sensor just by engaging the substrate
Can be assembled, improving workability in the assembly process
I do.

The case is located on the outside of the housing.
It is integrally formed on the side facing the axial direction of the output shaft,
Also, in the axial direction of the output shaft,
The substrate is engageable from along the direction. That is,
For the motor rotation position detection device, the case
Will be along the axial direction of the output shaft. This
In this way, the assembly direction of the components of the motor
By unifying, the assemblability can be improved.
Automatically detects the motor rotation position detection device with a machine such as an assembly device.
Even if you try to assemble, unify the assembly direction
Thus, the structure of the assembling device can be simplified.

Further, in this motor rotational position detecting device,
The case wall that constitutes the case is integrated with the housing wall
The space inside the case is wide,
The degree of freedom increases. That is, the magnetic sensor is held and accommodated.
Case to the housing wall with screws or caulking.
It is not necessary to set it, and there is no need for screw stoppers or caulking parts
The space inside the case can be widened and the board can be enlarged.
The magnetic sensor can be easily mounted.

The case wall is integrated with the housing wall.
Cause the case to rattle or come off
No fear. And the assembling accuracy is improved,
The sensing of the magnetic sensor can be obtained, and the reliability increases.

Further, the case wall is integrated with the housing wall.
Makes it unnecessary to use screws for fixing the case.
Therefore, the number of parts can be reduced.

The substrate thus assembled
Straddles this rotating shaft in the circumferential direction of the rotating shaft of the armature.
And the engaging part is mounted on the board with the board straddling the rotation axis.
Can be held. In this way, the substrate
In this state, the engaging portion can hold the substrate.
In this motor rotation position detection device,
If the specifications of the device are changed,
The advantage is that the substrate can be reused even if the number of sensors increases or decreases.
There is a

That is, for example, a structure having one magnetic sensor
After mounting, attach multiple magnetic sensors to the
Change to a specification that generates signals with different phases from the sensor
In consideration of this, the magnetic sensor
Separated from each other, and from the magnet to each magnetic sensor
Must be approximately equal.

Here, in a configuration in which the substrate does not straddle the rotation axis,
Is to provide a board for each magnetic sensor,
It will be necessary to change the design of the installation position of the board and the engagement part.
You.

On the other hand, the present motor rotational position detecting device
Now, we need to place each magnetic sensor in the area that spans the rotation axis.
To separate the magnetic sensors from each other in the circumferential direction of the rotating shaft,
Moreover, the distance from the magnet to each magnetic sensor is approximately equal
Change the wiring on the board.
And the engaging portion can be diverted as it is. This
Like increasing or decreasing the number of such magnetic sensors
Changes the basic structure even when making design changes
Design change is easy, and
It is possible to divert the body, so if the cost is reduced,
Since the basic structure does not need to be changed,
The position accuracy of the sensor can be easily obtained.

According to the present invention, a worm is formed.
Perpendicular to the axial direction of the rotating shaft
Has an output shaft provided coaxially with the meshing helical gear
Motor rotational position detecting device for detecting the rotational position of the rotating motor
A rotating shaft provided on the rotating shaft,
It is a plurality of poles in which different poles are alternately arranged along the rotation direction of the shaft,
A magnet that rotates with the rotating shaft and assembled to the substrate
Facing the Ma Gunetto with vignetting state, the Amachi
A magnetic sensor that emits a pulse in accordance with the rotation of the
Shaft and outside of housing housing said helical gear
The output shaft is assembled from the axial direction of the
A case accommodating at least a part of the plate;
And the output shaft
The case is provided in the case so that
When accommodating the plate, the output shaft extends in the axial direction.
The board can be engaged, and the board is assembled in a predetermined state in the engaged state.
At the specified mounting position
And a plurality of engaging portions for supporting the substrate.
And

In the motor rotational position detecting device having the above structure,
Outside the housing that houses the rotating shaft and helical gear
The case is assembled, and the board is
All or part (ie, at least part) of
The magnetic sensor mounted on the board
A pulse is emitted with the rotation, and based on the occurrence of the pulse,
The rotation position and the like of the motor are detected.

In the present motor rotational position detecting device,
The base is provided with an engagement portion, and at least a part of the substrate is provided.
If the board is engaged with the engaging portion while the
The part guides the board to the specified assembly position,
When the board reaches the assembly position, the engaging section supports the board
I do. This allows the positioning of the substrate, that is,
Positioning of the attached magnetic sensor is completed. this
Just by engaging the board with the engagement part,
Since assembly including positioning can be performed,
Workability is improved.

Here, the case is output outside the housing.
It is assembled from the axial direction of the shaft.
The engagement part formed on the shaft is in the direction along the axial direction of the output shaft.
Can be engaged with the substrate. That is, this motor rotation position
In the detection device, assembly of the case and
It follows the axial direction of the output shaft. Thus, the motor
Unifying the assembly directions of the components of the rotational position detector
In addition to improving the assemblability, for example,
Attach automatically sets the置検detection device in the machine of the assembling device, etc.
Even if you try, the assembly direction is unified,
Can be simplified.

Further, the board in the case after assembly is
Rattling is prevented, and the sensor is
Thing is obtained and reliability is increased.

The substrate thus assembled
Are engaged with each other of the rotation shaft and the output shaft described above.
Provided in the case so as to face each other in the direction crossing the direction
Therefore, when viewing the board from the axial direction of the rotation axis,
Substrate is placed so as to straddle the rotation axis or output
Along the axis of the shaft and beside the axis of rotation.
You.

In any of these cases, the substrate is
Most or all of them in the direction along the axis of the output shaft
Is located on the side of the rotation axis. Here, all of this substrate
Or the side where most are located
It is the opposite side to the mounting direction of the substrate. For this reason,
Attach the board to the rotating shaft and magnet when attaching
Considering the contact between the placed elements, etc.
Substrate along the axis of the output shaft for the turning shaft and magnet
It is only necessary to consider the positional accuracy in the mounting direction of
The circuit board and each element provided on the circuit board during assembly are
It can prevent contact with the spindle and magnet.

According to the present invention, a worm is formed.
Perpendicular to the axial direction of the rotating shaft
Has an output shaft provided coaxially with the meshing helical gear
Motor rotational position detecting device for detecting the rotational position of the rotating motor
A rotating shaft provided on the rotating shaft,
It is a plurality of poles in which different poles are alternately arranged along the rotation direction of the shaft,
A magnet that rotates with the rotating shaft and assembled to the substrate
The armature faces the magnet with the armature
A magnetic sensor that emits a pulse in accordance with the rotation of the
Constructs a housing that houses a shaft and the helical gear
Side of the housing wall facing in the axial direction of the output shaft
Having a case wall integrally formed with the housing wall of the
Open outside the housing and in the axial direction of the output shaft
To accommodate at least a part of the substrate therein.
And the respective axes of the rotation shaft and the output shaft.
Provided in the case so as to face each other in the direction of intersection,
The axial direction of the output shaft when the substrate is accommodated in the case
The substrate can be engaged from a direction along
Guides the substrate to a predetermined assembly position and
A plurality of engaging portions for supporting the substrate at the assembling position
And characterized in that:

In the motor rotational position detecting device having the above structure,
A housing housing the rotating shaft and helical gear inside
The housing wall that composes the case wall that composes the case
Integrally formed, including this case wall
All or part of the board (ie,
At least a part of the magnet)
The rotation of the rotating shaft (that is, the rotation of the magnet)
)), A pulse is emitted, and based on the occurrence of the pulse,
The rotation position and the like of the motor are detected.

Here, in this motor rotational position detecting device,
When the case is open to the outside of the housing,
In addition, the case is provided with an engagement
At least the board from the mouth side, that is, from the outside of the housing
The board is engaged with the engaging part while the part is also accommodated in the case.
If the base is guided to the specified
When the board reaches the predetermined assembly position, it is
The substrate is supported. As a result, positioning of the substrate,
In other words, the positioning of the magnetic sensor
finish. In this way, just engage the board with the engaging part
Can be assembled including positioning of the magnetic sensor
Therefore, workability in the assembling process is improved.

The case is located on the outside of the housing.
It is integrally formed on the side facing the axial direction of the output shaft,
Also, in the axial direction of the output shaft,
The substrate is engageable from along the direction. That is,
For the motor rotation position detection device, the case
Will be along the axial direction of the output shaft. This
In this way, the assembly direction of the components of the motor
By unifying, the assemblability can be improved.
Automatically detects the motor rotation position detection device with a machine such as an assembly device.
Even if you try to assemble, unify the assembly direction
Thus, the structure of the assembling device can be simplified.

Further, in this motor rotational position detecting device,
The case wall that constitutes the case is integrated with the housing wall
The space inside the case is wide,
The degree of freedom increases. That is, the magnetic sensor is held and accommodated.
Case to the housing wall with screws or caulking.
It is not necessary to set it, and there is no need for screw stoppers or caulking parts
The space inside the case can be widened and the board can be enlarged.
The magnetic sensor can be easily mounted.

The case wall is integrated with the housing wall.
Cause the case to rattle or come off
No fear. And the assembling accuracy is improved,
The sensing of the magnetic sensor can be obtained, and the reliability increases.

Further, the case wall is integrated with the housing wall.
Makes it unnecessary to use screws for fixing the case.
Therefore, the number of parts can be reduced.

The substrate thus assembled
Are engaged with each other of the rotation shaft and the output shaft described above.
Provided in the case so as to face each other in the direction crossing the direction
Therefore, when viewing the board from the axial direction of the rotation axis,
Substrate is placed so as to straddle the rotation axis or output
Along the axis of the shaft and beside the axis of rotation.
You.

In any of these cases, the substrate is
Most or all of them in the direction along the axis of the output shaft
Is located on the side of the rotation axis. Here, all of this substrate
Or the side where most are located
It is the opposite side to the mounting direction of the substrate. For this reason,
Attach the board to the rotating shaft and magnet when attaching
Considering the contact between the placed elements, etc.
Substrate along the axial direction of the output shaft against the rotating shaft and a magnet
It is only necessary to consider the positional accuracy in the mounting direction of
The circuit board and each element provided on the circuit board during assembly are
It can prevent contact with the spindle and magnet.

The present invention described in claim 7 provides the present invention according to claims 1 to
A motor rotational position detecting device according to claim 6,
And at least one of the substrate and the housing
The magnetic sensor on the side opposite to the magnet via
It is characterized by having provided.

According to the motor rotational position detecting device having the above structure,
If the substrate and housing are between the magnet and the magnetic sensor
Since at least one of the
Between the magnet and the magnetic sensor
Depending on the intervening person, any
Magnetic sensor for foreign matter such as conductive brush powder and flying solder
The adhesion to the lead wire is prevented. This allows
Of foreign matter such as conductive brush powder and flying solder
Can prevent malfunctions and failures caused by

[0067] The present invention according to claim 8, claim 1請
7. The motor rotational position detecting device according to claim 6 , wherein potting for burying at least a part of the substrate in the case is performed.

In the motor rotation position detecting device having the above configuration,
Potting is performed in the case, and this potting
By burying the board, the sealing property to the board is improved.
Obtained, and the waterproofness is improved.

[0069]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 2, in a jam protection power window of an automobile, a drive motor (for example, a DC motor) 14 is provided in a vehicle door 12. The drive motor 14 is connected to a drum 16 which is driven to rotate by this. Both ends of the wire 18 are spirally wound around the drum 16. A carrier plate 20 is fixed to an intermediate portion of the wire 18.
, The window glass 24 attached to the carrier plate 20 rises (moves in the door closing direction) and descends (moves in the door opening direction).

In the drive motor 14, as shown in FIG.
A worm 30 is formed at an intermediate portion of the motor output shaft 28 of the rotor (armature) 26, and a helical gear 32 meshes with the worm 30, and these are connected to a housing 34 (FIG. 3).
Shown). An output gear 36 is provided coaxially with the helical gear 32 and protrudes out of the housing 34, and the drum 16 is meshed and connected to the output gear 36. Forward rotation of the armature 26 (rotation in the direction of arrow A),
The reverse rotation (rotation in the direction of arrow B) causes the drum 16 to rotate forward (rotation in the direction of arrow A) and reverse (rotation in the direction of arrow B).

At the base end of the motor output shaft 28, a magnet 38 is provided annularly on the outer periphery thereof. Magnet 38
Are a plurality of poles in which different poles are arranged in the rotation direction of the armature 26. In this embodiment, two Hall ICs constituting a magnetic sensor are provided outside the housing 34 in the radial direction of the motor output shaft 28 in correspondence with the magnet 38 having two poles.
(The first Hall IC 40, the second Hall IC 4
2). As shown in FIG. 3, each Hall IC 40, 42
When viewed from the axial direction of the helical gear 32 (the helical gear 32
(Along the axial direction of the motor), and is incorporated in a substrate 50 overlapping with the motor output shaft 28, and the substrate 50 is further incorporated in the case 44. As shown in FIGS. 4, 7, and 8, the case 44 has a substantially flat cross-section taken along a direction orthogonal to the axial direction (specifically, a part of a circle is cut in parallel). One end of the case 44 is screwed into a female screw portion 47 of the housing 34 with a screw 48 and screwed into a caulking hole 46 at one end and the other end of the case 34. Projection (Fig. 7)
) Is inserted and heat caulked.

As shown in FIG. 4, the first Hall IC 40 is positioned at an angular interval θ in the direction in which the armature 26 is reversed with respect to the second Hall IC 42. In the present embodiment, the angle interval θ is 90 °. As shown in FIG. 5, the first Hall IC 40
Emits a pulse, it is delayed by 1/4 cycle of this pulse,
The second Hall IC 42 emits a pulse, and the Hall IC 4
0, 42, pulses are emitted one after another, and the emitted pulses are transmitted from a terminal 52 on the substrate 50 to a terminal E (not shown).
It is sent to the CU (or CPU; control device). As shown in FIG. 3, a drive motor power line 58 is connected to the ECU via a relay connector 56 in addition to a pulse signal line 54 as a lead wire of the Hall ICs 40 and 42 having one end fixed to the case 44. Connected.

When the armature 26 reverses, the pulse generation order is reversed. After the second Hall IC 42 emits a pulse, the first Hall IC 40 emits a pulse with a delay of １ ／ cycle of this pulse.

That is, when the armature 26 rotates forward,
The pulse of the first Hall IC 40 rises first, and then
The pulse of the second Hall IC 42 rises. Also, the first
The pulse of the Hall IC 40 rises first, and then the second
The pulse of the Hall IC 42 falls.

When the armature 26 rotates in the reverse direction, the pulse of the second Hall IC 42 rises first, and then the pulse of the first Hall IC 40 falls.

In the ECU, the pulse of the first Hall IC 40 and the pulse of the second Hall IC 42 are added together, and
The count is incremented by the rotation of the armature 26 in the window glass closing direction or the rotation of the window glass in the upward direction (normal rotation), and the count is decreased in accordance with the rotation of the armature 26 in the window glass opening direction or the rotation of the window glass in the downward direction (reverse rotation). That is,
The pulse counts of the pulses emitted from the first Hall IC 40 are 2, 4, 6,....

The pulse count is, as shown in FIG.
This corresponds to the position where the window glass 24 is raised and lowered.

The control of the ECU when raising the window glass 24 will be described. The pulse count at the lower limit position of the window glass 24 is set to 0, and the pulse count number at the upper limit position of the window glass is set to n + 1.

In the process of raising the window glass 24, the drive motor 1
When a lock current (overcurrent) is generated in the window glass 4 and the pulse count number does not reach the pulse count number n, the occurrence of the lock current causes the window glass 24 to stop rising and immediately fall to perform an anti-jamming operation. When a foreign substance such as a finger is caught between the window glass 24 and the upper edge 25 of the window frame, a lock current is generated in the drive motor 14, but the above-described operation for preventing the clogging may be performed only by stopping the rising of the window glass 24. ,
Various operations are possible.

In the process of raising the window glass 24, the drive motor 1
When the lock current is generated in the window glass 4 and the pulse count number has reached the pulse count number n, the window glass 24 does not perform the anti-jamming operation even if the lock current occurs. When the windowpane 24 is closed, a resistance is generated between the windowpane 24 and the upper edge 25 of the window frame to generate a lock current, but the closing operation of the windowpane 24 is performed normally. In other words, after the pulse count number n, the dead zone 60 is set, in which the closing operation can be performed normally without performing the anti-jamming operation even when the lock current flows.

The ECU detects the order of pulse generation to determine whether the armature 26 is rotating forward or reverse. Since it is not necessary to perform the anti-jamming operation when the window glass 24 is lowered, the circuit for the anti-jamming operation can be omitted when it is determined that the rotation is reversed, which is convenient. Further, by determining whether the armature 26 is rotating forward or backward, whether the window glass 24 has reached the upper limit end is determined.
It is possible to determine whether the lower limit end has been reached, and to reset the pulse count at the upper limit position or the lower limit position. For example, even if the pulse count number when the window glass 24 is completely closed does not reach n + 1, or the pulse count number exceeds n + 1, the pulse count number is reset to n + 1 at the rising limit position of the window glass 24. Accordingly, the correspondence between the pulse count number and the position at which the window glass 24 moves up and down with respect to the window frame can be obtained with high accuracy.

Next, the operation of the first embodiment will be described.

With the rotation of the armature 26 of the drive motor 14, a pulse is emitted for each of the Hall ICs 40 and 42. There is a phase difference in the pulse between the Hall ICs 40 and 42,
The number of pulses with respect to the rotation amount of the armature 26 is twice as large as that of a single Hall IC, and the pulse resolution is increased.

Therefore, the dead zone 60 is 、, which is smaller when there are two Hall ICs than when there is one Hall IC. As the dead zone 60 becomes smaller,
Normal closing of the window glass is guaranteed, and the operation of preventing pinching of even smaller foreign matter can be reliably performed.

Since the order in which the pulses of the Hall ICs 40 and 42 are generated differs depending on whether the armature 26 is rotated forward or backward, it is possible to determine whether the armature is rotating forward or backward by detecting this difference.

Further, to increase the resolution of the pulse,
This is achieved without increasing the number of poles of the magnet 38,
Judgment of normal rotation and reverse rotation of the armature 26 can be achieved without providing a separate means therefor, and a simple structure is sufficient.

Also, the elements of the Hall IC are
If exposed inside, foreign objects such as conductive brush powder and flying solder may adhere between the leads and cause malfunction or failure.To prevent this, the useful life must be shortened. Absent. According to the above configuration, the Hall IC 4
0 and 42 are mounted outside the housing 34 and the Hall IC 4
The elements 0 and 42 are isolated from the inside of the housing 34 by the case 44 wall and the housing 34 wall.
It is not exposed inside and such a problem does not occur.

Further, in this embodiment, the Hall IC
Since the substrate 50 on which the 40 and 42 are mounted is mounted on the outside of the housing 34 together with the case 44, the substrate 50 or the Hall IC 40,
The assembly of 42 itself becomes extremely easy.

In the configuration of the present embodiment described above, the mounting direction of the case 44 to the housing 34 (ie, the mounting direction of the board 50 in which the Hall ICs 40 and 42 are mounted to the housing 34) is the same as that of the helical gear 32. And the same as the direction in which the helical gear 32 is assembled to the housing 34. Therefore,
For example, when automating the assembly of these components,
Since the moving direction of the moving body (robot hand, etc.) of the machine used for automation is the same, there is no need to make the machine perform complicated two-dimensional or three-dimensional movement, so the configuration of such a machine is simplified. In addition, the automation itself becomes easy.

In the present embodiment, the Hall IC 4
The Hall ICs 0 and 42 are assembled by mounting the substrate 50 to the case 44. That is, the Hall IC 40 to be used,
Regardless of the number of 42, the hole I can be formed only by assembling the substrate 50.
The assembly of C40 and C42 is completed.

Further, as shown in FIG.
In the circumferential direction of rotation of the motor output shaft 28 of the rotor 26.
Since it is arranged so as to straddle the data output shaft 28,
For example, when changing the specifications of the device,
Diversion of the substrate 50 even if the number of the ICs 40 and 42 increases or decreases.
There is an advantage that becomes possible.

That is, for example, in this embodiment,
Board is provided with two Hall ICs 40 and 42
However, by bending the substrate 50, a plurality of
Even if the Hall ICs 40, 42 are provided, each Hall IC 40,
The distance between the magnet 42 and the magnet 38 can be made substantially the same. Only
However, the substrate 50 curved in this manner has a Hall IC.
Even a single configuration is sufficient. Accordingly
Therefore, the present substrate 50 can be used even with a single Hall IC.
And if there are more than one Hall IC in the future,
If only the mounting position of the Hall IC at 50 is changed,
Can be dealt with, and the shape and position of other members
It does not need to be changed. Because of this, such a hall
Make design changes to increase or decrease the number of ICs 40 and 42
In such a case, the design can be easily changed and the parts
It is possible to divert itself, so if the cost becomes lower,
No need to change the basic structure of the hall
The positional accuracy of the ICs 40 and 42 can be easily obtained.

In this embodiment, the helical gear 3
The substrate 50 overlaps the motor output shaft 28 along the second axial direction.
In order for the helical gear 32 to engage,
In the portion of the plate 50 that overlaps the helical gear 32,
Of the substrate 50 with respect to the axial direction (thickness direction) of the cull gear 32.
The inclination in the thickness direction is reduced. For this reason, the thinness of the entire device
Molding can be achieved.

Further, when assembling the Hall ICs 40 and 42 into the case 44 alone, the pulse signal line 54 connected to the Hall ICs 40 and 42 in the case 44 is considered.
In this embodiment, the pulse signal line 54 and the like and the Hall IC 4
Since the terminals 0 and 42 can be connected, the above problem is solved.

In mounting the Hall ICs 40 and 42 outside the housing 34, the case 44 is fixed to the outer surface of the housing 34 by screws 48 and heat caulking, but other fixing means such as fixing with an adhesive or the like are also possible. It is.

In the first embodiment, as shown in FIG. 5, the pulse phase difference between the Hall ICs 40 and 42 is
This corresponds to 50% of the pulse width, which is particularly preferable, but is not limited as long as the pulses of the Hall ICs 40 and 42 are not synchronized. The phase difference can be changed by changing the angle interval θ. However, considering the assembly error of each part, the pulse width is 5% to 9%.
A phase difference in the range of 5% is preferred.

In the first embodiment, the number of poles of the magnet 38 is two. However, the number of poles is not limited to two, and an even number of poles such as four or six may be used. The angle interval θ in which the phase difference of the pulse between the Hall ICs is 1/4 cycle is 45 ° for 4 poles and 30 ° for 6 poles. That is, the angle interval θ = 180 / the number of poles (even number).

Further, in the first embodiment, the hole I
The number of C is two, but is not limited to this. However, if two or more Hall ICs are arranged at an angular interval θ, two or more Cs are possible. In this case, the number of pulse counts is equal to the number of Hall ICs, and the pulse resolution is further improved.

Next, a second embodiment will be described with reference to FIGS.
It will be described based on.

In the second embodiment, the Hall IC 40,
A case 70 containing two 42 is fixed to the outer surface of the housing 34 by a stopper 72. The stopper 72 has a plate shape, one end of which is fixed to the outer surface of the housing 34, and the other end of which sandwiches the case 70 with the wall of the housing 74.

The stopper 72 is made of a magnetic material such as Fe. By forming the stopper 72 from a magnetic material, the lines of magnetic force of the magnet 38 act outwardly in the radial direction of the magnet 38 toward the stopper 72, and the stopper 72 and the magnet 38
The Hall ICs 40 and 42 interposed between the
Even if the wall and the housing 74 are cut off from the magnet 38 in the housing 74 by the wall, the magnetic field of the magnet 38 is reliably detected.

The other structure, operation and effect are the same as those of the first embodiment.

Next, a third embodiment will be described with reference to FIGS.
6 will be described.

In the third embodiment, the case 100 wall is formed integrally with the housing 102 wall. That is, as shown in FIG. 11 to FIG.
The bottom wall 104 and a part of the side wall 105 are made common with the housing 102 wall, the remaining part of the side wall 105 is raised from the housing 102 wall, and the opposite side to the bottom wall 104 is opened. It has a substantially rectangular shape when viewed from above.

A part of the bottom wall 104 of the case 100 has a stepped semicircular shape corresponding to the outer shapes thereof so as to cover the peripheral portions of the motor output shaft 28 and the magnet 38. Recessed guides 106 as engagement portions are formed on the opposing inner surfaces of the side walls facing each other in a direction perpendicular to the axial direction of the motor output shaft 28 so as to protrude.

The guide 106 extends from the open end of the case 100 toward the bottom wall 104. Both edges of the substrate 108 are engaged and guided in the recesses of the guide 106,
However, as shown in FIG.
Inserted in 0. A notch 110 having a semicircular arc shape is formed in the substrate 108, and the notch 110
8 is inserted into the case 100 so that the bottom wall 104 corresponds to the semicircular arc-shaped portion. As shown in FIG. 15, in a state where the substrate 108 is in contact with the bottom wall 104, the open end of the guide 106 is pressed (heat swaged), and the substrate 108 is held at a predetermined position. The swaged portion is indicated by 114. Substrate 1
The Hall ICs 40 and 42 are attached to one side of the projection 08 so as to correspond to the magnet 38 in a protruding state. The Hall ICs 40 and 42 are arranged at a predetermined interval θ, as in the first embodiment.

Thereafter, as shown in FIG.
Inside 0, the potting 112 is performed, and the substrate 108 is buried in the potting 112.

Next, the operation of the third embodiment will be described.

The wall of the case 100 is integrated with the wall of the housing 102, so that the space inside the case 100 (the area shown by a chain line in FIG. 13) is widened, and the degree of freedom in mounting the substrate 108 is increased. That is, in order to mount the Hall IC outside the housing, it is not necessary to fix the case for holding and housing the Hall IC to the housing wall by screwing or caulking, so that the screw fixing portion and the caulking portion are not required. Case 10
The internal space can be made large, the substrate 108 can be made large, and the Hall ICs 40 and 42 can be easily mounted.

Furthermore, the case 100 wall is
By being integrated with the two walls, there is no danger that the case 100 will rattle or come off. Then, the assembling accuracy is improved (there is no displacement of the magnetic sensor), and more reliable operation of the Hall ICs 40 and 42 is obtained, and the reliability is increased.

Further, by integrating the wall of the case 100 with the wall of the housing 102, screws, tooth washers, etc. are not required, and the number of parts can be reduced.

In the present embodiment, the housing 10
The Hall ICs 40 and 42 can be inserted from the opening side of the case 100 which opens toward the outside of the case 2. Therefore, the Hall ICs 40, 42 inside the housing 102
Hall IC without the complicated work of assembling
Since assembling of 40 and 42 is possible, workability in the assembling process is improved.

Further, in the present embodiment, the case 100
A guide 106 is provided in the inside. When the substrate 108 is engaged with the guide 106 while accommodating the substrate 108 in the case 100, the positioning of the substrate 108, that is, the substrate 108
The positioning of the Hall ICs 40 and 42 attached to the. As described above, since the assembly including positioning of the Hall ICs 40 and 42 can be performed only by engaging the substrate 108 with the guide 106, workability in the assembly process is improved.

In addition, the case 100 is attached to the housing 34.
Is opened in the axial direction of the helical gear 32, and the mounting direction of the helical gear 32 and the substrate 10
8 are inserted in the same direction. Further, the guide 106
Is engaged with the outer peripheral portion of the substrate 108 housed in the case 100 along the axial direction of the helical gear 32.
That is, in the present embodiment, the case 10
0, the direction of engagement of the board 108 with the guide 106, and the direction of assembly of the helical gear 32 to the housing 34 are the same. Therefore, for example, when automating the assembly of these members, the moving direction of the moving object (robot hand or the like) of the machine used for the automation becomes the same, so that the machine has complicated two-dimensional or three-dimensional movement. Therefore, the configuration of such a machine can be simplified, and automation itself can be facilitated.

The notch 110 is formed on the substrate 108.
And the motor output shaft 28 of the armature 26
Disposed over the motor output shaft 28 in the circumferential direction of the lever
In addition, the guide 106 removes the substrate 108 in this state.
Because of the support structure, if the specifications of the equipment are changed,
To the number of Hall ICs 40 and 42 attached to the substrate 108
Even if it increases or decreases, there is an advantage that the substrate 108 can be reused.
is there.

That is, in the present embodiment, the notch
The Hall ICs 40 and 42 are separated from each other along 110.
Assembling the Hall ICs 40 and 42 on the substrate 108
In the circumferential direction of rotation of the motor output shaft 28, the Hall ICs 40, 4
2 were separated from each other. However, Hall IC
It is said that there was one Hall IC such as 40 and 42
The position of the substrate 108 along the notch 110
Can be assembled with a Hall IC. Therefore,
Even if it has a single Hall IC, as in the present embodiment,
If the substrate 108 is applied, the Hall IC will be
Even if it increases, only by changing the wiring etc. of the substrate 110, each
The member and the guide 106 can be used as they are. like this
In this embodiment, the design of the number of Hall ICs is changed.
No need to change basic structure when changes are made
Therefore, design change is easy, and parts can be reused
Therefore, the cost is low and the basic structure
It is not necessary to change the
Position accuracy can be easily obtained.

Further, the guide 10 for supporting the substrate 108
6 is the motor output shaft 28 and the helical gear 32 described above.
Facing each other in a direction orthogonal to each axial direction of
Of the substrate 108 is provided on the substrate 100
Above the motor output shaft 28 (that is,
(Assembly direction side when assembling). This
In mounting the substrate 108, the motor output shaft 28
To prevent the substrate 108 from interfering with the magnet 38
Or it can be reduced, and the magnet 38 or
When the substrate 108 and the like interfere with the motor output shaft 28,
This prevents the deterioration of the positional accuracy of the Hall ICs 40 and 42 that occurs.
In this sense, Hall IC 40, 42nd place
Positioning accuracy can be improved.

Also, rattling of the substrate 108 in the case 100 after assembly is prevented, and a more reliable Hall IC
Sensing by 40 and 42 is obtained, and reliability is increased.

Further, in the present embodiment, the Hall ICs 40 and 42 are assembled at predetermined intervals along the periphery of the cutout 110 formed in the substrate 108, and
08 is a housing 102 extending from the side of the notch 110 along a direction orthogonal to the axial direction of the armature 26.
Assembled to Therefore, by assembling the substrate 108 such that the armature 26 axis is positioned inside the notch 110, the distance from the axis of the armature 26 axis to each of the Hall ICs 40 and 42 can be equalized. For this reason, the assemblability is improved and the Hall ICs 40, 4
2 can improve the positional accuracy.

Further, the inside of the case 100 is potted 1
By filling with 12, the sealing property is obtained, the waterproof property is excellent, and the holding of the substrate becomes more reliable.

Further, since the bottom wall 104 of the case 100 is common to the wall of the housing 102, as compared to preparing a case having a bottom wall separately, as shown in FIG. The distance from the magnet 38 may be short, and even if the magnetic force of the magnet 38 is weak, the magnetism can be sufficiently detected.

The other structure, operation and effect are the same as those of the first embodiment.

The present invention is not limited to the above embodiments, and various modifications are possible. For example, in each of the embodiments described above, the drive motor applied to the jam protection power window is described. However, the drive motor is not limited to such a power window.
In addition, the present invention is applicable not only to a power window but also to various other devices, and is not limited to a DC motor.
Others may be used.

Further, in each of the above embodiments, the magnetic sensor is constituted by the Hall IC, but is not limited to this.
Various things are possible.

In each of the above embodiments, the Hall IC is
However, the present invention is not limited to this, and a single Hall IC does not reduce the operation and effect of the present invention.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a part of a drive motor according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a power window to which the drive motor according to the first embodiment is applied.

FIG. 3 is an overall perspective view of the drive motor according to the first embodiment.

FIG. 4 is a sectional view taken along line 4-4 of FIG. 8;

FIG. 5 is a time chart of a pulse.

FIG. 6 is a diagram showing a vertical position of a window glass corresponding to a pulse count number.

FIG. 7 is a plan view showing the drive motor according to the first embodiment in a state where a Hall IC is not mounted.

FIG. 8 is a plan view showing the drive motor according to the first embodiment with a Hall IC mounted.

FIG. 9 is a perspective view showing a drive motor according to a second embodiment in a state where a Hall IC is not mounted.

FIG. 10 is a perspective view showing a drive motor according to a second embodiment with a Hall IC mounted.

FIG. 11 is a perspective view showing a drive motor according to a third embodiment in a state where a Hall IC is not mounted.

FIG. 12 is a sectional view taken along line 12-12 of FIG.

FIG. 13 is a plan view showing a drive motor according to a third embodiment with a Hall IC mounted.

FIG. 14 is a perspective view showing a Hall IC mounting process of the drive motor according to the third embodiment.

FIG. 15 is a view corresponding to FIG. 14, showing a subsequent process of mounting the Hall IC.

FIG. 16 is a view corresponding to FIG. 14 and showing a subsequent process of mounting a Hall IC.

[Explanation of symbols]

 14 Drive motor 26 Armature 34 Housing 38 Magnet 40 Hall IC (magnetic sensor) 42 Hall IC (magnetic sensor) 44 Case 50 Substrate 70 Case 74 Housing 100 Case 102 Housing 106 Guide (engaging portion) 108 Substrate 112 Potting

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-235723 (JP, A) JP-A-3-137530 (JP, A) JP-A-63-58264 (JP, A) JP-A-58-1983 105074 (JP, A) Japanese Utility Model 4-16314 (JP, U) Japanese Utility Model Sho 61-110112 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01D 5/00-5 / 62 G01B 7/00-7/34 G01P 1/00-3/80

Claims (8)

(57) [Claims] A motor rotation position detection device for detecting a rotation position of a motor having an output shaft which is orthogonal to an axial direction of a rotation shaft having a worm and is provided coaxially with a helical gear meshing with the worm. And a plurality of poles provided on the rotating shaft and having different poles alternately arranged along a rotating direction of the rotating shaft, a magnet rotating with the rotating shaft, and the magnet viewed from the axial direction of the output shaft. A magnetic sensor that faces the magnet in a state where it is mounted on a substrate that overlaps with a rotating shaft, and that emits a pulse with the rotation of the armature; and a housing that houses the rotating shaft and the helical gear , and an axial direction of the output shaft. a case for holding the substrate in a state wherein the housings <br/> assembled to ring, which contains at least a portion of said substrate therein along, Motor rotational position detection device, characterized in that it comprises. 2. A motor rotation position detection device for detecting a rotation position of a motor having an output shaft which is orthogonal to an axial direction of a rotation shaft having a worm and is provided coaxially with a helical gear meshing with the worm. And a plurality of poles provided on the rotating shaft and having different poles alternately arranged along a rotating direction of the rotating shaft, a magnet rotating with the rotating shaft, and the magnet viewed from the axial direction of the output shaft. A magnetic sensor that faces the magnet in a state where it is mounted on a substrate that overlaps with a rotation axis and emits a pulse in accordance with rotation of the armature; and the output shaft of a housing wall that forms a housing that houses the rotation shaft and the helical gear. It has integrally formed case wall to the housing wall axially opposite side of the housing at least a portion of the substrate within
And a case for holding the substrate in a state . 3. An axial direction of a rotating shaft on which a worm is formed.
Helical gear that is orthogonal to the gear and meshes with the worm
The rotational position of a motor having an output shaft provided coaxially
A motor rotation position detection device for detecting, wherein the rotation direction is provided on the rotation shaft and the rotation direction of the rotation shaft.
And a plurality of poles in which different poles are alternately arranged along the rotation axis and
A magnet that rotates together, and is disposed so as to straddle the rotating shaft in a rotating circumferential direction of the rotating shaft.
Opposes the magnet when assembled on a substrate
A magnetic cell that emits a pulse with the rotation of the armature.
And a housing for housing the rotation shaft and the helical gear.
The shaft is assembled from the axial direction of the output shaft to the outside of the
A case for accommodating at least a part of the substrate, and a case provided in the case , for accommodating the substrate in the case.
At the same time, the substrate is moved from a direction along the axial direction of the output shaft.
An engagement portion that is engageable and supports the substrate in the engaged state . 4. In the axial direction of the rotating shaft on which the worm is formed.
Helical gear that is orthogonal to the gear and meshes with the worm
The rotational position of a motor having an output shaft provided coaxially
A motor rotation position detection device for detecting, wherein the rotation direction is provided on the rotation shaft and the rotation direction of the rotation shaft.
And a plurality of poles in which different poles are alternately arranged along the rotation axis and
A magnet that rotates together, and is disposed so as to straddle the rotating shaft in a rotating circumferential direction of the rotating shaft.
Opposes the magnet when assembled on a substrate
A magnetic cell that emits a pulse with the rotation of the armature.
And a housing for housing the rotation shaft and the helical gear.
In the axial direction of the output shaft in the housing wall constituting the housing
There is a case wall integrally formed with the facing housing wall.
And outside the housing and in the axial direction of the output shaft.
Facing and open at least part of the substrate inside.
And a case provided in the case, for storing the substrate in the case.
At the same time, the substrate is moved from a direction along the axial direction of the output shaft.
Engageable, the motor rotation position detecting device characterized by comprising an engagement portion for supporting said substrate in engagement, the. 5. An axial direction of a rotating shaft on which a worm is formed.
Helical gear that is orthogonal to the gear and meshes with the worm
The rotational position of a motor having an output shaft provided coaxially
A motor rotation position detection device for detecting, wherein the rotation direction is provided on the rotation shaft and the rotation direction of the rotation shaft.
And a plurality of poles in which different poles are alternately arranged along the rotation axis and
A magnet that rotates together, and faces the magnet in a state where it is assembled to the substrate,
Magnetic sensor that emits a pulse according to rotation of the armature
And a housing accommodating the rotation shaft and the helical gear.
The shaft is assembled from the axial direction of the output shaft to the outside of the
A case accommodating at least a part of the substrate, and a direction intersecting with each axial direction of the rotation shaft and the output shaft.
The case is provided in the case so as to face each other,
Along the axial direction of the output shaft when the substrate is accommodated in the
The substrate can be engaged from the direction, and the substrate is
Guidance to the specified mounting position and the specified mounting
And a plurality of engaging portions for supporting the substrate at the mounting position. 6. An axial direction of a rotating shaft on which a worm is formed.
Helical gear that is orthogonal to the gear and meshes with the worm
The rotational position of a motor having an output shaft provided coaxially
A motor rotation position detection device for detecting, wherein the rotation direction is provided on the rotation shaft and the rotation direction of the rotation shaft.
And a plurality of poles in which different poles are alternately arranged along the rotation axis and
A magnet that rotates together, and faces the magnet in a state where it is assembled to the substrate,
Magnetic sensor that emits a pulse according to rotation of the armature
And a housing accommodating the rotation shaft and the helical gear.
In the axial direction of the output shaft in the housing wall constituting the housing
There is a case wall integrally formed with the facing housing wall.
And outside the housing and in the axial direction of the output shaft.
Facing and open at least part of the substrate inside.
The case that intersects in the axial direction of the rotation shaft and the output shaft
The case is provided in the case so as to face each other,
Along the axial direction of the output shaft when the substrate is accommodated in the
The substrate can be engaged from the direction, and the substrate is
Guidance to the specified mounting position and the specified mounting
And a plurality of engaging portions for supporting the substrate at the mounting position. 7. At least the substrate and the housing.
Also on the opposite side to the magnet via either
A magnetic sensor is provided, wherein the magnetic sensor is provided.
Item 7. A motor rotational position detecting device according to any one of Items 6. 8. The apparatus according to claim 8 , wherein at least one of said substrates is provided in said case.
Characterized by potting where the part is buried
Motor rotation position according to any one of claims 1 to 7.
Detection device.