JP2007113988A - Angle sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an angle sensor 1 capable of suppressing its cost, offering definitely accuracy and layout property, and detecting directly a relative angular displacement of a biaxial system. <P>SOLUTION: The angle sensor 1 comprises: a Hall IC 7 for detecting a change in angle relative to a magnet 6b; a circuit holder 5 for holding a substrate 9 on which the Hall IC 7 is mounted; a magnet holder 6 for holding the magnet 6b; an inner clip holder 3 which extends from the head of the lower edge section of the magnet holder 6 toward the outer circumference of both sides; an outer clip holder 4 which extends from the head of the lower edge section of the circuit holder 5 toward the outer circumference of the both sides so as not to overlap the inner clip holder 3; and a clip 14 which is disposed on respective both sides of the inner clip holder 3 and the outer clip holder 4 for inputting values of outside two systems being rotated and displaced relative to each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention belongs to the technical field of an angle sensor that detects a relative angular displacement of a biaxial system.

In a conventional angle sensor, a brush provided on the rotationally displaced shaft side contacts a resistor provided as a substrate pattern, and rotational displacement, that is, an angle is detected by a change in resistance value (for example, (See Patent Document 1).
JP-A-8-75405 (page 2-8, full view)

  However, in the case of the conventional angle sensor, in order to detect the relative angular displacement of the biaxial system, it is necessary to provide two angle sensors and calculate the difference, which increases the cost, decreases the accuracy, and improves the layout. The problem was a decline.

  The present invention has been made by paying attention to the above-mentioned problems, and its object is to reduce costs, ensure accuracy and layout, and directly detect the relative angular displacement of a biaxial system. It is to provide an angle sensor.

  In order to achieve the above object, in the present invention, a detection element that detects a change in relative angle with a detection object, a substrate holding unit that holds a substrate on which the detection element is installed, and a detection object that holds the detection object An object holding unit, an arrangement for detecting a change in relative angle between the detection object and the detection element, and a rotation permissible means for allowing the substrate holding unit and the detection object holding unit to be coaxially and relatively rotationally displaceable, A base end is connected to each of the substrate holding part and the detection object holding part, and is cylindrical and is coaxial inside the outer rotating shaft part that rotates on the outside of the coaxial and the cylindrical inner hole of the outer rotating part. An inner rotating shaft portion that rotates in such a manner, an inner arm that extends in the outer circumferential direction on both sides from the tip of the inner rotating shaft portion, and an outer arm that extends in the outer circumferential direction on both sides so as not to overlap the inner arm from the tip of the outer rotating shaft portion. Said outer arm, Provided on the side arm and both ends of the outer arms, characterized in that it comprises an input transmission unit for inputting the two systems of external relative rotational displacement, the.

  Therefore, according to the present invention, it is possible to provide an angle sensor that can suppress costs, ensure accuracy and layout, and detect a relative angular displacement of a biaxial system.

  Hereinafter, an embodiment for realizing an angle sensor of the present invention will be described based on Example 1.

First, the configuration will be described.
FIG. 1 is a perspective view of the angle sensor according to the first embodiment. FIG. 2 is a plan view of the angle sensor according to the first embodiment. FIG. 3 is a bottom view of the angle sensor according to the first embodiment. 4 is a cross-sectional view taken along the line AA in FIG.
In the angle sensor 1 of the first embodiment, a mounting portion provided in the lower case 2 is attached to a fixing member, and a biaxial rotating member is attached to each of the inner clip holder 3 and the outer clip holder 4 disposed on the bottom surface portion. Detect the relative rotational position.

The angle sensor 1 of the first embodiment mainly includes a lower case 2, an inner clip holder 3, an outer clip holder 4, a circuit holder 5, a magnet holder 6, a Hall IC 7, an IC holder 8, a substrate 9, a tap screw 10, and an upper case 11. It is configured.
The lower case 2 is provided with a through hole 2c so that the lower cylindrical part 2a having a cylindrical shape with the lower surface opened and the upper cylindrical part 2b having a cylindrical shape with the upper surface opened are shared at the center, A flat surface portion 2d for attachment is provided, and an attachment portion 2e to a fixing member as the angle sensor 1 is provided.

The inner clip holder 3 is provided with a central engagement portion 3a that is inserted in the center at the lower end portion of the magnet holder 6 and engaged so as to rotate integrally. Moreover, it extends from the center engaging part 3a to both outer peripheral sides, and constitutes an attachment part 3b of the clip 14. The attachment portion 3b of the clip 14 has a substantially rectangular tube shape, and the clip 14 is inserted to form a portion into which the tongue piece of the rotating lever of the non-detection object can be inserted.
The outer clip holder 4 has a central engagement portion 4a that penetrates the central engagement portion 3a of the inner clip holder 3 in the center, and inserts the lower end portion of the circuit holder 5 and engages it so as to rotate integrally. Provide. Moreover, it extends from the center engaging part 4a to both outer peripheral sides, and constitutes an attachment part 4b of the clip 14. The attachment portion 4b of the clip 14 has a substantially rectangular tube shape, and a portion into which a tongue piece of a rotating lever of a non-detection object can be inserted is formed by inserting the clip 14.

The circuit holder 5 has a shape in which a smaller cylindrical portion is provided to extend downward on a cylindrical lower surface opened upward, and a hole penetrating vertically at the center is provided. The magnet holder 6 is rotatably supported by the upper cylindrical lower surface and the cylinder outer wall. At that time, the lower end portion 6a of the magnet holder 6 is configured to protrude downward. Further, the upper cylindrical outer wall portion is provided with two mounting projections 5a to the IC holder 8 at positions facing 180. The convex portion 5a has a shape having a hole inside.
The magnet holder 6 has a shape having a lower end portion 6a extending downward from a thick disc-shaped portion. A recess is provided in the center of the disc-shaped portion so that the Hall IC 7 is not in contact with the inner center. To be able to position. Magnets 6b are provided in two opposing locations on the outer peripheral side of the recess.

The Hall IC 7 has a Hall element that detects a change in magnetic flux density and a detection signal processing circuit in one chip. In the embodiment, two Hall ICs 7 are used.
The IC holder 8 is attached to the chip portion of the Hall IC 7 for protection and easy handling, and an engagement hole 8a that engages with the convex portion 5a of the circuit holder 5 is provided at a portion extending on both sides. Provided at two opposing positions, and further, on the inner surface thereof, convex portions 8b for engaging with the substrate 9 are provided at two opposing positions.

The substrate 9 is provided with a circuit for processing the detection signal of the Hall IC 7 to become the output of the angle sensor 1. The Hall IC 7 also has a foot attached to the substrate 9 and becomes a part of the circuit. Further, the substrate 9 is provided with a hole for the tap screw 10, a hole for the leg of the Hall IC 7, and a hole for alignment with the IC holder 8.
In addition, a harness 15 for connecting to the outside is connected to the substrate 9.
The tap screw 10 firmly fastens the substrate 9 and the IC holder 8, and the substrate 9, the IC holder 8, and the circuit holder 5.
The upper case 11 covers the periphery so as to protect the parts assembled to the lower case 2.

Next, the assembly structure of the angle sensor 1 of Example 1 will be described.
The circuit holder 5 is inserted into the upper cylindrical part 2 b of the lower case 2 and assembled so that the lower end part protrudes downward from the through hole 2 c of the lower case 2. Thereby, the circuit holder 5 becomes rotatable with respect to the lower case 2.
Next, the magnet holder 6 is inserted into the circuit holder 5 from above. At that time, the lower end portion 6 a of the magnet holder 6 protrudes from the through hole of the circuit holder 5.

In this state, the lower cylindrical portion 2a of the lower case 2 protrudes downward from the through hole 2c, and the lower end portion 6a of the magnet holder 6 is further directed downward from the inside. It will be protruding.
In the lower cylindrical portion 2 a of the lower case 2, the center engaging portion 4 a of the outer clip holder 4 is attached to the lower end portion of the circuit holder 5. Next, the central engaging portion of the inner clip holder 3 is attached to the lower end portion of the magnet holder 6 at a predetermined rotational direction angle so that the phase of the rotational direction angle of the clip mounting portion 4b of the outer clip holder 4 is different from that of the clip mounting portion 4b. Install 3a.

As a result, the following movements are possible.
That is, the circuit holder 5 can rotate with respect to the lower case 2, and the magnet holder 6 can rotate with respect to the circuit holder 5. The outer clip holder 4 is fixed with respect to the circuit holder 5, and the inner clip holder 3 is fixed with respect to the magnet holder 6. Therefore, the outer clip holder 4 and the inner clip holder 3 are in relation to the lower case 2, that is, absolutely relative to each other in an angular range where the portions extending from the center engaging portions 3 a and 4 a to the outer periphery do not interfere with each other. That is, it can also be rotated relatively.

  Next, the Hall IC 7 is held by the IC holder 8, the convex portion 8 b of the IC holder 8 is engaged with the positioning hole of the substrate 9, and the substrate 9 and the IC holder 8 are fixed by a tap screw. Electrical connection with solder.

  Further, the element portion held so as to protrude below the Hall IC 7 is positioned inside the space of the central recessed portion of the magnet holder 6 in other words, in other words, the opposing magnet The hole of the board 9 and the hole of the convex part of the circuit holder 5 are fixed by the tap screw 10 so as to be positioned in the space between them.

  As a result, the relative rotation between the inner clip holder 3 and the outer clip holder 4 becomes the relative rotation between the magnet holder 6 and the circuit holder 5 and the relative rotation of the Hall IC 7, the IC holder 8, and the substrate 9 with respect to the magnet 6 b. Note that the rotation of the substrate 9 itself is a characteristic structure of the first embodiment.

Next, an assembly structure of the harness 15 that performs electrical connection between the substrate 9 and the outside of the angle sensor 1 will be described.
The flat portion 2d of the lower case 2 is provided with a harness housing portion 2f and an L-shaped projection portion 2g. The harness housing portion 2f is configured by a wall surface at a predetermined interval along the longitudinal direction from the end portion of the flat portion 2d at the end portion in the longitudinal direction of the lower case 2, and further, between the harness housing portion 2f and the cylindrical portion. The flat portion 2d is provided with an L-shaped protrusion 2g having an L shape which is upright and bent at the tip thereof in a direction perpendicular to the longitudinal direction.
In addition, the harness 15 is provided with a folded portion 15a that is folded and fixed with a tape or the like so as to form a ring. Further, when the folded portion 15a is provided, a sufficient margin is provided in the length from the portion electrically connected to the substrate 9 to the folded portion 15a. The specific length is set to a length that allows the substrate 9 to rotate within a predetermined angular range without receiving tension or the like when the folded portion 15a is positioned on the flat surface portion 2d.

The harness 15 is fixed so that the folded portion 15a of the harness 15 is hooked on the L-shaped projecting portion 2g and the portion extending from the folded portion 15a is sandwiched between both wall surfaces of the harness housing portion 2f. As a result, the folded portion 15 a to the attachment portion of the substrate 9 are largely curved in a U shape within a range allowed for the upper case 11.
Next, the upper case 11 covers the flat portion 2d, the upper cylindrical portion 2b, the substrate 9, the harness 15 and the like of the lower case 2 and is fixed to the lower case 2 to complete the assembly.

Next, the clip structure of the inner clip holder 3 and the outer clip holder 4 will be described.
As shown in FIGS. 3 and 5, the inner clip holder 3 and the outer clip holder 4 each have two clip attachment portions.
FIG. 6 is a partial cross-sectional view for explaining the shape of the clip.
As shown in FIGS. 5 and 6, the clip 14 is provided with a portion connecting the side walls on both sides with respect to the square hole-shaped clip mounting portions 3 b and 4 b, and an opening is formed in the portion connecting the side walls. A structure is provided to be engaged with the inside of the clip mounting portions 3b and 4b. Furthermore, as shown in FIG. 6, the portion connecting the side walls is folded downward at the upper portion, and the lower tip is further bent into a taper shape. The folded portion is configured to have a predetermined gap with the wall surface of the clip mounting portion.

Thereby, when a plate-shaped object is inserted into the gap, the bent portion becomes a spring, and the plate-shaped object is pressed against the wall surfaces of the clip mounting portions 3b and 4b by the spring property and fixed.
Further, as shown in FIG. 7, the pressing direction of the inner clip holder 3 and the outer clip holder 4 is set upside down on the left and right. In other words, the rotation direction is the same.

Next, the temporary pin structure will be described.
The lower cylindrical portion 2 a of the lower case 2 is provided with an insertion port 2 h for the temporary fixing pin 16. The temporary fixing pin 16 has two insertion portions parallel to each other at a predetermined interval.
FIG. 3 shows a state in which the temporary fixing pin 16 is inserted into the lower case 2 for explanation.
In the state in which the temporary fixing pin 16 is inserted into the lower case 2, the clip attachment portion of the inner clip holder 3 is inserted between the two insertion portions and the position is maintained, and the tips of the two insertion portions are connected to the circuit holder. The outer clip holder 4 is held in contact with the outer clip holder 4 engaged with the lower end portion 5 and is in a phase of 90 degrees with the inner clip holder 3.

Next, the operation will be described.
[Attaching to the device]
As shown in FIG. 8, the device 17 attached to the angle sensor 1 according to the first embodiment is an output unit in which the inner lever 17a and the outer lever 17b rotate relative to each other. Two tongue pieces extending in the axial direction on the outside are provided.
The tongue pieces are fixed so as to be inserted into the portions 3b and 4b to which the clips of the inner clip holder 3 and the outer clip holder 4 of the angle sensor 1 are attached.

By the way, there is a problem in the attachment to the device 17.
In the inner clip holder 3 and the outer clip holder 4, since there is no restriction on the initial position, it is necessary to adjust the position of the attachment portion when attaching to the device 17. However, since the attachment portions 3b and 4b are inside the lower case 2, it is difficult to adjust the position, and the inner clip holder 3 and the outer clip holder 4 that cause relative angular displacement are more difficult than the conventional case. There was a problem.
This problem is solved in the first embodiment.

[Easy attachment to device]
In the first embodiment, by inserting the temporary fixing pin 16 into the lower case 2, the inner clip holder 3 and the outer clip holder 4 are positioned in a phase relationship of 90 degrees, and the position is determined based on the insertion hole of the lower case 2. Therefore, it is not necessary to adjust the position at the time of assembly, and the device 17 can be attached very easily. Also, the accuracy of assembly is improved. In the first embodiment, a mounting hole 2i is provided in the lower portion of the insertion port 2h of the lower case 2, and is fixed to the device 17 with a screw. In such a case, since the positional relationship between the clip holder and the levers 17a and 17b is determined based on the mounting holes of each other, the assembly becomes very easy.

In the angle sensor 1 according to the first embodiment, the insertion hole 2 h is provided in the lower case 2, the temporary fixing pin 16 is inserted, and the device 17 is assembled.
After the assembly with the device 17 is completed, the temporary fixing pin 16 is removed, and the insertion port 2h for the temporary fixing pin 16 allows the board housing portion of the angle sensor 1 to communicate with the outside even after the device 17 and the lower case 2 are screwed. And sufficient water resistance and insulation can be ensured.

  Furthermore, in the angle sensor 1 according to the first embodiment, when the temporary fixing pin 16 is inserted into the lower case 2, the mounting hole 2i with the device 17 of the lower case 2 is hidden when viewed from above. I can't. Therefore, the temporary fixing pin 16 must be pulled out at the time of screwing to prevent forgetting to remove.

[Action to detect relative displacement angle directly]
In the angle sensor 1 of the first embodiment, when the inner lever 17a of the device 17 rotates, the engaged inner clip holder 3 rotates. Then, the magnet holder 6 engaged with the inner clip holder 3 rotates. Then, in the magnet holder 6, the angular position of the magnet held by the magnet holder 6 is changed with respect to the Hall IC 7 attached to the circuit holder 5. As a result, the amount of magnetic flux passing through the Hall IC 7 changes, and the change in the relative displacement angle is directly detected from the change in the detection voltage due to this change.

When the outer lever 17b of the device 17 is rotated, the engaged outer clip holder 4 is rotated. Then, the circuit holder 5 engaged with the outer clip holder 4 is rotated. Then, in the magnet holder 6, the angular position of the Hall IC 7 attached to the circuit holder 5 is changed with respect to the magnet 6 b held by the magnet holder 6. As a result, the amount of magnetic flux passing through the Hall IC 7 changes, and the change in the relative displacement angle is directly detected from the change in the detection voltage due to this change.
As described above, in the angle sensor 1 according to the first embodiment, it is possible to directly detect a relative movement, instead of separately detecting and calculating the movements of the inner lever 17a and the outer lever 17b of the device 17. Therefore, calculation and reference position errors are reduced, and the relative angular displacement can be detected with high accuracy.

[Position accuracy improvement of Hall IC and magnet]
In the angle sensor 1 according to the first embodiment, the Hall IC 7 and the magnet 6b rotate relative to each other due to the engagement of another member interposed therebetween, so that a lot of errors may be accumulated. Deterioration of the linearity of the output value becomes a problem. Further, when the position is changed due to an impact or the like during use, there is a problem because accuracy is lowered, that is, a detection angle error is generated.
On the other hand, in the first embodiment, this problem is solved by the mounting structure using the tap screw 10.

  In the first embodiment, the Hall IC 7, the IC holder 8, and the substrate 9 are attached to the circuit holder 5 by inserting the convex portion 5 a of the circuit holder 5 into the engagement hole 8 a of the IC holder 8 and The tap screw 10 is inserted into the hole of the convex portion 5a of the circuit holder 5 and screwed while pushing the convex portion 5a apart. Therefore, after the tap screw 10 is attached, there is no clearance between the convex portion 5 a and the engagement hole of the IC holder 8. That is, the circuit holder 5 is integrated with no play.

As a result, the engagement hole 8a of the IC holder 8 and the convex portion 5a of the circuit holder 5 are inserted with a backlash with an error when assembled, but the backlash by the tap screw 10 causes a backlash. In the integrated state without any gap, the centering is performed with respect to the backlash, so that error accumulation is absorbed and a decrease in accuracy is suppressed.
This also suppresses the occurrence of positional displacement during assembly and the deterioration of the linearity of the output value.
In addition, since the IC holder 8 holding the Hall IC 7 is directly integrated and fixed to the circuit holder 5, the position of the Hall IC 7 with respect to the magnet 6b is stabilized.
The integrated mounting does not change even when it is subjected to impacts or the like during use, and the integrated mounting without backlash does not change, so that backlash does not increase and does not affect accuracy.

[Suppression of angle detection error in clip part]
In the angle sensor 1 of the first embodiment, the detection error is also suppressed at the clip portion.
When considering accurate angle detection, first, detection of relative angular displacement by a biaxial structure can be considered. In the case of a biaxial structure, the device side is devised to be fixed with bolts. However, in this structure, when an axis shift occurs between two axes, stress is generated inside the sensor and may be damaged.

  On the other hand, as in the first embodiment, when the magnet holder 6 and the circuit holder 5 are in the coaxial configuration, the clip holder is provided with one arm from the center and engaged with the device 17 side by one clip. Devised. However, with this structure, there is a problem that a force that causes an axial deviation occurs in the rotating shaft due to relative displacement, and an axial deviation occurs due to the clearance for rotational sliding, which becomes an angle detection error. This is an allowable range for movement, but it is not desirable to move by an amount corresponding to the clearance according to the angle to cause an angular error. For example, if the angle formed by each arm is 180 degrees or less, a force acts in the direction of synthesis on the side where the angle becomes smaller, and the axis moves so as to be fully displaced by an allowable clearance (FIG. 9). reference).

  On the other hand, in the first embodiment, an arm-like extension portion is provided on both sides from the central rotating portion, and clip attachment portions 3b and 4b are provided on both sides, respectively, so as to have a coaxial structure overlapping the cross. To do. As a result, even if the extension portion (arm-like portion) of the inner clip holder 3 and the outer clip holder 4 to the outer periphery of each of the inner clip holder 3 and the outer clip holder 4 generates a force in the synthesis direction at 180 degrees or less, the synthesis is similarly performed on the opposite side. A force is generated in the direction, and as a result, the force is canceled out, and no force is generated in the direction of the axis deviation. Therefore, occurrence of an angle detection error due to the axis deviation is suppressed. Thereby, it becomes a device attachment clip structure which contributes to accuracy improvement.

Further, as shown in FIG. 7, the clip 14 has a structure in which the tongue piece portion of the device 17 is held by the wall surfaces of the clip attachment portions 3 b and 4 b of the inner clip holder 3 and the outer clip holder 4 and the spring portion of the clip 14. It is. Further, the pressing direction of the clips 14 on both sides is set to the same rotation direction.
As a structure for pressing the tongue of the device 17, a structure in which the tongue of the device 17 is pressed and held from both sides by two spring portions of the clip 14 as shown in FIG. 10 has been devised. However, in this structure, when a rotating force is generated, the spring is displaced, and an error of the spring displacement corresponding to the force is generated for the angle detection.

  Furthermore, in the configuration of FIG. 10, there is an attachment error between the clip 14 and the clip attachment portions 3b and 4b, and a positional error of the spring portion of the clip 14 bent from both sides also occurs.

  In the first embodiment, both the inner clip holder 3 and the outer clip holder 4 have a structure in which the clip attachment portions 3b and 4b hold the tongue portion of the device 17 between the spring portion of the clip 14 and the wall surface of the clip attachment portion. Yes, by using one as a fixing member, the tongue piece of the device 17 is pressed against the wall surface by a strong load and held in a fixed state. As a result, when a rotating force is generated, the one rotation direction receives the force by the fixing member, and therefore an error of the spring displacement corresponding to the force does not occur. In the other direction of rotation, the tongue of the device 17 is strongly pressed by the spring force, so that a spring displacement error corresponding to the force does not occur at a load smaller than the load of the two spring forces.

In the case of pressing and holding the tongue of the device 17 from both sides with a spring, even if it is pressed with a strong load, the load from both directions cancels and an error of the spring displacement occurs with respect to the received load. .
On the other hand, in Example 1, if all the forces received in the use region are equal to or less than the set load, the spring displacement error according to the force does not occur, and even if there is a use exceeding it, it is set. It is possible to suppress the error only by the amount exceeding the load.

Furthermore, in the first embodiment, while the wall surface of the fixing member is used for the engagement with the device 17, the pressing direction by the spring portion of the clip 14 is set to the same rotational direction on both sides. Even when there is an error or an attachment shape error, the deviation is absorbed by the rotation of the inner clip holder 3 or the outer clip holder 4 and the displacement of the spring portion of the clip 14. As a result, assembly is performed without damage.
That is, when it is necessary to allow displacement to the wall surface side by installation in the same rotation direction, the inner clip holder 3 or the outer clip holder 4 rotates and absorbs, and the displacement of the clip 14 to the spring displacement side is absorbed. If it must be allowed, the movement will be absorbed by the spring displacement. When installed in different directions of rotation, the inner clip holder 3 or the outer clip holder 4 does not act to rotate and absorb, most of which must be absorbed by the spring displacement of the clip 14, and to be displaced greatly Since the load cannot be increased, the above-described engagement with the device 17 side is not successful.
By setting the rotation directions of the wall surfaces and the spring portions of the clip 14 to be the same, the device 17 side is favorably held, and further absorption such as displacement is further performed.

[Action to control cost and allow substrate rotation]
In the angle sensor 1 according to the first embodiment, the Hall IC 7 is directly connected to the substrate 9 and the substrate 9 is rotated together with the circuit holder 5 to directly detect the relative angular displacement while suppressing the cost. Therefore, there is a problem of how to make the harness 15 structure that is connected to the substrate 9 and outputs at least a detection signal to the outside. This is because some structures are very expensive.

In the first embodiment, the normal harness 15 has a sufficient margin to allow the substrate 9 to rotate. Further, the fixing structure of the harness 15 facilitates the assembly while suppressing the cost. That is, the folded portion 15a is hooked on the L-shaped projecting portion 2g, and the portion extending from the folded portion 15a is simply sandwiched between both wall surfaces of the harness housing portion 2f. It is very easy to assemble. In addition, the mounting structure is very cost-effective.
In this state, when a force for pulling the harness 15 from the outside is applied, the force is received by the L-shaped protruding portion 2g and the folded portion 15a. Will not be disturbed.

In addition, when a force is applied to move the harness 15 in a direction substantially perpendicular to the direction in which the harness 15 is pulled, the force is applied between the wall surfaces of the harness housing portion 2f. It only receives, and does not prevent any good rotation of the substrate 9.
Furthermore, the fact that the substrate 9 can be rotated and the harness 15 is sufficiently fixed regardless of whether the upper case 11 is attached or not is attached to the device 17 of the angle sensor 1 or In the assembly process of the angle sensor 1, the work is facilitated.

  Moreover, it becomes an inexpensive structure in which a normal harness 15 is attached to the substrate 9, and for example, a metal sliding part for electrical connection that allows rotation, a flat cable that facilitates rotation, or the like is not used. This is a configuration with extremely low cost.

Next, the effect will be described.
In the angle sensor 1 according to the first embodiment, the effects listed below can be obtained.

  (1) The Hall IC 7 that detects a change in relative angle with the magnet 6b, the circuit holder 5 that holds the substrate 9 on which the Hall IC 7 is installed, the magnet holder 6 that holds the magnet 6b, and the magnet 6b and the Hall IC 7 are relative to each other. The circuit holder 5 and the magnet holder 6 are coaxially and relatively rotatable and displaceable, and their base ends are connected to the circuit holder 5 and the magnet holder 6, respectively, and are cylindrical and rotate outside the coaxial. A magnet holder lower end 6a that rotates coaxially inside a cylindrical inner hole at the circuit holder lower end, a circuit holder lower end, and an inner clip holder that extends from the tip of the magnet holder lower end 6a in the outer circumferential direction on both sides 3 and both ends of the circuit holder so that it does not overlap the inner clip holder 3 Since the outer clip holder 4 that extends in the circumferential direction and the clips 14 that are provided at both ends of the inner clip holder 3 and the outer clip holder 4 and perform two systems of external relative rotational displacement are provided, costs can be suppressed and accuracy can be reduced. In addition, the layout can be ensured, and the relative angular displacement of the biaxial system can be detected.

  (2) Input transmission from the outside is because the inner clip holder 3 and the outer clip holder 4 are provided with a recess to accommodate the clip 14 and engage with the outside so as to be sandwiched between the spring portion of the clip 14 and the wall surface of the recess. Angle detection errors caused by the rotating force can be suppressed. Further, it is possible to prevent the detection output from being frequently output due to vibration or the like.

  (3) The spring portion of the clip 14 is arranged so as to press in the same rotational direction on both sides of the inner clip holder 3 and the outer clip holder 4, so that there is a margin for attachment to the device 17, and the axis deviation from the device 17 Even when this occurs, the deviation can be absorbed. That is, the error can be absorbed. Further, by providing a margin, it is possible to prevent a part of the angle sensor 1 from being greatly stressed during assembly and causing deformation or the like.

  (4) Since the inner clip holder 3 and the outer clip holder 4 are arranged so as to have a substantially cross shape, the axis alignment with the device 17 is facilitated, and the assembling property is further improved.

  (5) The means for allowing the circuit holder 5 and the magnet holder 6 to rotate coaxially is a structure in which the magnet holder 6 is accommodated in the circuit holder 5 so as to be rotatable coaxially. In addition, a non-contact detection structure in which the Hall IC 7 and the magnet 6b are rotationally displaced coaxially can be achieved.

  (6) The Hall IC 7 is installed on the substrate 9 such that the IC holder 8 for holding the element portion of the Hall IC 7 is interposed while the electrical connection is made directly to the substrate 9. 8a, and the circuit holder 5 is provided with a convex portion 5a, the convex portion 5a is inserted into the engagement hole 8a of the IC holder 8, and the tap screw 10 is deformed so as to expand the outer periphery of the convex portion 5a. Since the circuit holder 5 and the IC holder 8 are fastened together, the circuit holder 5 and the IC holder 8 can be fixed without looseness, and the angle error can be reduced. In addition, the relative position between the Hall IC 7 and the magnet is maintained with high accuracy, and further error reduction can be achieved.

  (7) The Hall IC 7 that detects a change in the relative angle with the magnet 6b, the circuit holder 5 that holds the substrate 9 on which the Hall IC 7 is installed, the magnet holder 6 that holds the magnet 6b, and the magnet 6b and the Hall IC 7 are relative to each other. The circuit holder 5 and the magnet holder 6 are coaxially arranged so as to be relatively rotatable and displaceable so that the angle change is detected, and two external inputs for relative rotation and displacement are transmitted to the circuit holder 5 and the magnet holder 6, respectively. The outer clip holder 4 and the inner clip holder 3 are provided with a harness 15 for electrical connection between the substrate 9 and the outside, a folded portion 15a is formed by folding a part of the harness 15, and the folded portion 15a is hooked. The L-shaped protrusion 2g to be locked is provided, and the L-shaped protrusion 2g and the folded portion 1 of the harness 15 are provided. Since the harness accommodating portion 2f that restricts the movement of the harness 15 in the direction in which the lock of a is released is provided, a structure for rotating the substrate 9 can be established with a configuration that greatly reduces the cost, and the assembly work Can be made easier.

  (8) The L-shaped projecting portion 2g is made of an L-shaped member orthogonal to the direction in which the harness 15 is pulled out from the board 9, and the harness housing portion 2f is in a direction in which the harness 15 is pulled out from the board 9 to the outside. Along with this, since the harness 15 is held between the walls 15 at a predetermined interval, the rotation of the substrate 9 can be prevented from being hindered even if the harness 15 is pulled from the outside. Further, no matter what direction the force is applied to the harness 15 from the outside, the rotation of the substrate 9 can be prevented from being disturbed, and the engagement of the folded portion 15a can be prevented from being released. Can easily.

  (9) Since the temporary fixing pin 16 that holds the positions of the inner clip holder 3 and the outer clip holder 4 in the assembled position is provided, the assembly with the device 17 can be facilitated.

  (10) Since the assembly position is a position where the detected relative angle is 0, it is not necessary to adjust the position of the portion to be engaged when attaching to the device 17, and the attachment is easy. In addition, initialization in an apparatus or system that uses the output of the angle sensor 1 can be facilitated.

  (11) If the temporary fixing pin 16 is not removed, the attachment hole to the device 17 is covered and the attaching operation cannot be performed. Therefore, forgetting to remove the temporary fixing pin 16 can be prevented, and the quality in the process Can be improved.

The second embodiment is an example in which the angle sensor 1 is provided with an absolute angle sensor.
FIG. 11 is a cross-sectional view of the angle sensor 1 according to the second embodiment. FIG. 12 is a side view in which the upper case 11 of the angle sensor 1 according to the second embodiment is omitted.

In the second embodiment, an electrode 12 that varies the detection resistance value or the detection voltage depending on the contact position with the brush 13 is provided on the lower surface of the portion of the substrate 9 that protrudes from the upper surface of the circuit holder 5 to the outer peripheral side. Brushes 13 are provided at two portions of the portion and brought into contact with the electrode 12 to constitute an absolute angle sensor.
That is, a sensor for detecting the absolute rotation angle of the circuit holder 5 with respect to the lower case 2 is provided separately from the detection of the relative angle by the magnet 6b and the Hall IC 7 for detecting the relative displacement in a non-contact manner.

The operation will be described.
[Action to control relative angle and absolute angle while suppressing cost]
In the second embodiment, relative to the external relative angular displacement input from the outer clip holder 4, in addition to the detection of the relative angular displacement by the magnet and the Hall IC 7 due to the rotation of the circuit holder 5, the rotational displacement is performed together with the circuit holder 5. The absolute angle is detected by the brush 13 installed on the substrate 9 and the lower case 2.
In this configuration, the substrate 9 of the Hall IC 7 is used, and the number of components other than the brush 13 is not particularly increased, and the absolute angle is detected with extremely low cost.
Furthermore, since the sensor for detecting the relative angle and the sensor for detecting the absolute angle are made into one sensor, the layout is improved. Moreover, the number of work steps is reduced by using one sensor.

Explain the effect. The angle sensor according to the second embodiment has the following effect in addition to the effect (1).
(12) Since the brush 13 of the lower case 2 and the electrode 12 of the substrate 9 are provided so as to detect the absolute angle of the circuit holder 5, both the relative angle and the absolute angle are detected by one angle sensor 1 with reduced cost. Layout and work efficiency can be improved.
In addition, the ability to detect an absolute angle is very advantageous for devices and systems that use the angle sensor 1. This is because it is possible to know a specific control range from the absolute angle while performing control by detecting the relative angle. In addition, since one absolute angle can be detected, if necessary, the other absolute angle can be obtained by performing calculations as necessary.

  (13) The circuit holder 5 is configured to be rotatable by providing the lower case 2 with an upper cylindrical portion 2b that allows the circuit holder 5 to rotate. The means for detecting the absolute angle is held by the circuit holder 5. Since the detection is performed by the substrate 9 and the lower case 2, both the relative angle and the absolute angle are detected by one angle sensor 1 that does not increase the cost by sharing the substrate 9 and is extremely cost-effective. Layout and work efficiency can be improved.

  As mentioned above, although the angle sensor of this invention has been demonstrated based on Example 1 and Example 2, it is not restricted to these Examples about a concrete structure, It concerns on each claim of a claim Design changes and additions are allowed without departing from the scope of the invention.

  In the embodiment, the detection object is the magnet 6b and the detection element is the Hall IC 7. However, other objects may be used. For example, a magnet and an MR sensor, a photo interrupter and a slit or reflecting member, a light emitting element and a light receiving element, an electrode and a brush.

  In the embodiment, the rotation permitting means has a structure in which the upper cylindrical portion 2b of the lower case 2 receives the circuit holder 5 so that the circuit holder 5 can rotate freely, and the magnet holder 6 receives the structure so as to rotate freely inside the circuit holder 5. However, it may be configured to allow rotation by using a bearing.

Note that examples of the angle sensors of the first and second embodiments that are particularly useful as application examples will be described below.
FIG. 13 is an explanatory diagram of a select assist device for an automatic transmission. FIG. 14 is an explanatory diagram of the selection unit of the selection assist device of the automatic transmission.
The select assist device of the automatic transmission is a device that assists in the select operation by the select lever 511.
The first rotating part 513 and the second rotating part 517 provided so as to be rotatable with respect to the rotating shaft 519 are respectively associated with a play groove 513 a provided in the first rotating part 513 and a protrusion 517 a provided in the second rotating part 517. As a result, relative displacement is possible only at a predetermined rotation angle, and when this range is exceeded, the projections 517a and the end portions of the play grooves 513a are engaged with each other, resulting in a connected movement.

The first rotating portion 513 is provided with a select lever 511 and a select knob 512 to input a select operation, and a check mechanism 514 is provided, and a tip portion 514a that is pressed by a spring (not shown) has a check plate 514b. The moderation feeling at the time of selection is generated by moving the groove 514c.
The second rotating unit 516 is provided with a lever 518 and is connected to the control lever 551 of the automatic transmission 55 by the cable 54. Further, the second rotating unit 516 is provided with a worm wheel 516 and is engaged with the worm 521 of the actuator 52 so that the actuator 52 performs a rotating operation.

The relative angular displacement between the first rotating unit 513 and the second rotating unit 517 is detected by the angle sensor 1 and output to the controller 53. The controller 53 controls the actuator 52 so as to be the middle point of the allowable relative displacement in which the protrusion 517a is located at the center of the idle groove 513a in FIG.
Then, the second transmission unit 517 is rotated by the control drive of the actuator 52 so as to follow the rotation of the first rotation unit 513 by the operation of the select lever 511, and the automatic transmission by the cable 54 is maintained while not being mechanically connected. The operation input to 55 is performed. As a result, even with a very small select lever compared to the existing mechanical select lever, it is possible to input a select operation to the automatic transmission with a light force operation.

Further, even when the actuator 52 is inoperable, an emergency manual input is possible if the end portion of the play groove 513a and the projection 517a are brought into contact with each other and mechanically connected and further operated.
In addition, since the moderation feeling of only the check mechanism 514 is normal, a free and light operation feeling can be realized.

In this automatic transmission select assist device, since the relative displacement angle of the first rotation unit 513 and the second rotation unit 517 is controlled to approach the midpoint, high accuracy is required for detection of the relative displacement angle. .
For this reason, the angle sensor 1 shown in the first and second embodiments can directly detect the relative angular displacement with high accuracy and can reduce the cost. Therefore, the application to the select assist device of the automatic transmission is advantageous.

Furthermore, the ability to detect either absolute angle as in the second embodiment enables control while looking at the absolute position, and enables better assist control.
However, this angle sensor is not limited to the application example described above as long as it detects a relative angular displacement.

It is a perspective view of the angle sensor of Example 1. FIG. FIG. 3 is a plan view of the angle sensor according to the first embodiment. It is a bottom view of the angle sensor of Example 1. It is AA sectional drawing of FIG. It is an exploded view of the angle sensor of Example 1. FIG. It is sectional drawing of the clip attachment part of the angle sensor of Example 1. FIG. It is explanatory drawing of the clip attachment part of the angle sensor of Example 1. FIG. It is explanatory drawing of the device attached to the angle sensor of Example 1. FIG. It is a figure explaining the effect | action of the force to the clip attachment part in the shape of one arm. It is a figure which shows the example of the structure fixed with a clip from both sides. It is sectional drawing of the angle sensor of Example 2. FIG. It is the side view which abbreviate | omitted the upper case of the angle sensor of Example 2. It is explanatory drawing of the selection assistance apparatus of an automatic transmission. It is explanatory drawing of the selection part of the selection assistance apparatus of an automatic transmission.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Angle sensor 2 Lower case 2a Lower cylindrical part 2b Upper cylindrical part 2c Through-hole 2d Plane part 2e Attachment part 2f Harness accommodating part 2g L-shaped protrusion part 2i Attachment hole 2h Insert port 3 Inner clip holder 3a Center engaging part 3b Mounting portion 3c Wall surface 4 Outer clip holder 4a Center engaging portion 4b Mounting portion 4c Wall surface 5 Circuit holder 5a Protruding portion 6 Magnet holder 6a Lower end portion 6b Magnet 7 Hall IC
8 IC holder 8a Engagement hole 8b Protruding part 9 Substrate 10 Tap screw 11 Upper case 12 Electrode 13 Brush 14 Clip 14a Spring part 15 Harness 15a Folding part 15b U-shaped bending part 16 Temporary fixing pin 17 Device 17a Inner lever 17b Outer lever 51 Select portion 511 Select lever 512 Select knob 513 First rotation portion 513a Play groove 514 Check mechanism 514a Tip portion 514b Check plate 514c Groove 516 Worm wheel 517 Second rotation portion 517a Projection 518 Lever 519 Shaft 52 Actuator 521 Warm 53 Controller 54 Cable 55 Automatic transmission 551 control lever

Claims (13)

A detection element for detecting a change in relative angle with the detection object;
A substrate holding unit for holding a substrate on which the detection element is installed;
A detection object holding unit for holding the detection object;
A rotation permitting means for arranging the detection object and the detection element to detect a relative angle change, and allowing the substrate holding part and the detection object holding part to be coaxially and relatively rotationally displaceable;
A base end is connected to each of the substrate holding part and the detection object holding part, and the outer rotating shaft part that is cylindrical and rotates on the outer side of the coaxial, and coaxial on the inner side of the cylindrical inner hole of the outer rotating part. An inner rotating shaft that rotates to become
An inner arm extending in the outer peripheral direction on both sides from the tip of the inner rotating shaft part;
An outer arm extending in the outer circumferential direction on both sides so as not to overlap the inner arm from the tip of the outer rotating shaft part;
An input transmission unit that is provided at both ends of the inner arm and the outer arm, and performs two systems of external relative rotational displacement;
Comprising
An angle sensor characterized by that. The angle sensor according to claim 1.
The input transmission unit is
Each arm is provided with a recess to accommodate the clip and engage with the outside so as to be sandwiched between the spring portion of the clip and the wall surface of the recess.
An angle sensor characterized by that. The angle sensor according to claim 2,
The spring portion of the clip is
Placed to press in the same direction of rotation on both sides of each arm,
An angle sensor characterized by that. The angle sensor according to any one of claims 1 to 3,
Arranged so that the inner arm and the outer arm are substantially cross-shaped,
An angle sensor characterized by that. The angle sensor according to any one of claims 1 to 4,
The rotation permission means is
The detection object holding part is coaxially and rotatably accommodated inside the substrate holding part,
An angle sensor characterized by that. In the angle sensor according to any one of claims 1 to 5,
The detection element is installed on the substrate, while the electrical connection is made directly to the substrate, a holding part for holding the element part of the detection element is interposed, and a mounting hole is provided in the holding part,
The substrate holding portion is provided with a convex portion, the convex portion is inserted into the mounting hole of the holding portion, and the substrate, the substrate holding portion, and the holding portion are fastened with a tap screw that deforms to expand the outer periphery of the convex portion. ,
An angle sensor characterized by that. A detection element for detecting a change in relative angle with the detection object;
A substrate holding unit for holding a substrate on which the detection element is installed;
A detection object holding unit for holding the detection object;
A rotation permitting means for arranging the detection object and the detection element to detect a relative angle change, and allowing the substrate holding part and the detection object holding part to be coaxially and relatively rotationally displaceable;
Input transmission means for transmitting two types of externally rotationally input inputs to the substrate holder and the detection object holder, respectively.
Provide a harness for electrical connection between the substrate and the outside,
A folded portion is formed by folding a part of the harness,
A locking part is provided to lock the folded part so as to be hooked,
An engagement accommodating portion is provided for restricting the movement of the harness in a direction in which the engagement between the engagement portion and the folded portion of the harness is released.
An angle sensor characterized by that. The angle sensor according to claim 7.
The locking portion is
It consists of an L-shaped member orthogonal to the direction of pulling out the harness from the board to the outside,
The engagement accommodating portion is
Along the direction of drawing the harness from the substrate to the outside, it consists of both members that hold the harness between the walls with a predetermined interval,
An angle sensor characterized by that. The angle sensor according to claim 1.
A temporary fixing means for holding the positions of the inner arm and the outer arm at the assembly position;
An angle sensor characterized by that. The angle sensor according to claim 9.
The assembly position is
It is a position where the relative angle to detect is 0.
An angle sensor characterized by that. The angle sensor according to claim 9 or 10,
The temporary fixing means is provided at a position where the next process cannot be performed unless it is removed.
An angle sensor characterized by that. The angle sensor according to claim 1.
Provided with an absolute angle detection means for detecting an absolute angle of the substrate holding part or the detection object holding part;
An angle sensor characterized by that. The angle sensor according to claim 12,
The rotation permission means is provided with a receiving portion that allows the substrate holding portion to rotate in the apparatus main body,
The absolute angle detection means includes
The substrate held by the substrate holding unit and detected by the apparatus main body,
An angle sensor characterized by that.

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