JP2009074832A - Rotation angle detector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To properly seal a case without hindering injection of a sealant by a harness. <P>SOLUTION: A rotation angle detector includes a sensor part 20 detecting the rotation angle of a detection object, a case 40 housing the sensor part 20, and a cap member 25 holding a conductive terminal 23 outputting a signal from the sensor part 20 and holding the harness 30 (wire 31) attached to the conductive terminal 23. A holding member 25d holding the harness 30 is provided in a central area of a surface in the cap member 25 opposite to the side of the sensor part 20. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rotation angle detection device, and more particularly to a rotation angle detection device suitable for a steering angle sensor or the like mounted on a motorcycle or the like.

Conventionally, in a rudder angle sensor or the like mounted on a motorcycle or the like, a cylindrical detection unit that detects a rotation angle of a handle of a motorcycle or the like and a circuit board that performs control according to a signal from the detection unit What is stored in a case is known (for example, refer patent document 1). In such a steering angle sensor, in order to prevent water intrusion to the detection means and the circuit board, one end of the harness connected to the circuit board is exposed from the case, and the periphery thereof is sealed with a sealant. Yes.
Japanese Utility Model Publication No. 60-57448

  However, in the conventional rudder angle sensor as described above, since the harness connected to the circuit board is sealed with the sealant without fixing, the harness prevents the injection of the sealant and the case properly May not be able to be sealed.

  This invention is made | formed in view of this subject, and it aims at providing the rotation angle detection apparatus which can seal a case appropriately, without preventing injection | pouring of a sealing agent with a harness.

  The rotation angle detection device of the present invention holds a detection means for detecting a rotation angle of a detection target, a case body that houses the detection means, and a conductive terminal that outputs a signal from the detection means, and is connected to the conductive terminal. And a cap member for holding the harness to be attached, and the holding means for holding the harness is provided in a central region on the surface of the cap member opposite to the detection means.

  According to this configuration, since the holding means for holding the harness is provided in the central region of the surface of the cap member opposite to the detection means, the harness is disposed in the vicinity of the center of the cap member, and the sealant is disposed around it. Since the region to be injected can be secured, the case can be appropriately sealed without hindering the injection of the sealant by the harness.

  In the rotation angle detection device, the detection unit includes a resistor substrate and a sliding member that slides a resistor forming portion provided on the resistor substrate, and the cap member includes the resistor substrate and the resistor substrate. It is preferable to provide a restricting portion that restricts the separation from the sliding member. In this case, since the separation between the resistor substrate and the slider is restricted by the restricting portion, it is possible to prevent the sliding member from separating from the resistor substrate and appropriately detect the rotation angle of the detection target. Is possible.

  In particular, in the rotation angle detecting device, it is preferable that the restricting portion is brought into contact with the back surface of the resistor forming portion on the resistor substrate. In this case, since the restricting portion can be brought into contact with the back surface of the resistor forming portion, it is possible to effectively prevent the resistor substrate and the sliding member from being separated.

  Moreover, in the said rotation angle detection apparatus, it is preferable to provide the level | step-difference part which positions the said cap member in the inner wall part of the said case body. In this case, since the cap member can be positioned by the step portion, the cap member can be surely positioned without the need for a component for positioning the cap member. .

  For example, in the rotation angle detection device, it is conceivable to provide a storage portion for storing the harness near the holding means of the cap member in the case body, and seal the storage portion with a sealant. Thus, by providing the accommodating part which accommodates a harness, it becomes possible to seal a case body reliably with the sealing agent inject | poured.

  According to the present invention, since the holding means for holding the harness is provided in the central region of the surface of the cap member opposite to the detecting means, the harness is arranged in the center of the cap member and the sealant is injected around the center. Therefore, the case can be appropriately sealed without hindering the injection of the sealant by the harness.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The rotation angle detection device according to the present embodiment is applied to, for example, a winker control device that controls turning on / off of a winker (direction indicator lamp) in accordance with the rotation angle of a handle in a motorcycle or the like. However, the present invention is not limited to this, and can be applied to other devices that detect the rotation angle of the detection target. In the following, this winker control device will be used as a specific example as appropriate.

  FIG. 1 is a perspective view showing an appearance of a rotation angle detection device 10 according to an embodiment of the present invention. FIG. 2 is a perspective view illustrating a state where the sealant is removed from the case of the rotation angle detection device 10 illustrated in FIG. 1. FIG. 3 is a side view of the rotation angle detection device 10 according to the present embodiment.

  As shown in FIGS. 1 to 3, the rotation angle detection device 10 according to the present embodiment includes a sensor unit 20, which will be described later, from one end side (the right side (the back side of the paper) shown in FIGS. 1 to 3). (Not shown in FIGS. 1 to 3, see FIG. 4), and a case 40 in which the harness 30 extends from the other end side (left side (front side in FIG. 1)). It has.

  The harness 30 includes a plurality of (three in the present embodiment) conducting wires 31 in which metal wires are bundled and a covering portion 32 that covers the periphery of these conducting wires 31. The tip of the covering portion 32 on the case 40 side is peeled off by a predetermined length, and the conductive wire 31 is exposed from the tip. The conducting wire 31 exposed from the covering portion 32 is attached to a conductive terminal 23 described later that outputs a signal from the sensor portion 20 disposed in the case 40.

  The case 40 is formed of, for example, an insulating resin material and has a generally cylindrical shape as shown in FIGS. The case 40 has a storage portion 41 for storing a resistor substrate 21 of the sensor unit 20 (to be described later), a harness 30 attached to the conductive terminal 23 fixed to the resistor substrate 21, and the like inside the cylindrical portion. is doing. A disc-shaped portion 42 extending toward the outer peripheral side of the storage portion 41 is formed at the right end of the storage portion 41 shown in FIGS. A cover member 50 that seals the sensor unit 20 stored in the storage unit 41 is attached to the disk-shaped unit 42. A plurality of reinforcing pieces 42 a for reinforcing the case 40 itself are formed on the surface of the disk-shaped portion 42.

  The storage unit 41 includes a sensor storage unit 41 a that stores the resistor substrate 21 and the like of the sensor unit 20, and a harness storage unit 41 b that stores the harness 30 attached to the conductive terminal 23 fixed to the resistor substrate 21. (See FIG. 4). As shown in FIG. 2, in the harness storage part 41b, the conducting wire 31 of the harness 30 is attached to the conductive terminal 23 of the sensor part 20 by solder or the like and is held by a cap member 25 described later. And the sealing agent 60 is inject | poured with respect to the harness accommodating part 42 of the state in which the harness 30 was hold | maintained in this way, and the harness accommodating part 42 is sealed as shown in FIG.

  Here, the internal configuration of the rotation angle detection device 10 according to the present embodiment will be described with reference to FIG. FIG. 4 is a cross-sectional view for explaining the internal configuration of the rotation angle detection device 10 according to the present embodiment. In addition, the internal structure of the rotation angle detection apparatus 10 shown in FIG. 4 shows an example, and is not limited to this, It can change suitably.

  As shown in FIG. 4, the storage part 41 is divided into a sensor storage part 41a and a harness storage part 41b. The sensor storage unit 41a stores the sensor unit 20 as detection means. The sensor unit 20 includes a resistor substrate 21 provided with a resistance pattern 21a and a sliding brush 22 that slides on the resistance pattern 21a.

  The resistor substrate 21 has a generally disk shape corresponding to the inner peripheral surface of the storage portion 41, and is disposed in a substantially central region of the case 40. A resistor pattern 21a having a generally semicircular arc shape is fixed to the right side surface of the resistor substrate 21 shown in FIG. The resistance pattern 21a is connected to a conductive terminal 23 extending to the left side shown in FIG. The configuration of the resistance pattern 21a will be described later.

  The sensor storage unit 41a stores, for example, a rotating body 24 that rotates according to the operation of the handle of the motorcycle. The rotating body 24 is formed with a shaft portion 24a that protrudes toward the resistor substrate 21 side. By accommodating the shaft portion 24a up to a certain position with respect to the hole formed in the resistor substrate 21, the rotating body 24 is rotatably held. The shaft portion 24a is held in the hole portion of the resistor substrate 21 via the bearing 24b.

  Further, the rotating body 24 is formed with, for example, a connecting portion 24c that is connected to a shaft (not shown) that rotates according to the operation of the handle of the motorcycle. When the connecting portion 24c rotates according to the rotation of the shaft or the like, the rotating body 24 rotates according to the operation of the handle.

  Further, the rotating body 24 is formed with a flat portion 24 d that faces the resistor substrate 21. A sliding brush 22 is attached to a predetermined position of the flat surface portion 24d. The sliding brush 22 is fixed to the flat surface portion 24d so that the tip end portion thereof is in elastic contact with the resistance pattern 21a on the resistor substrate 21. When the rotating body 24 rotates, the sliding brush 22 slides on the resistance pattern 21a. In the rotation angle detection device 10 according to the present embodiment, the rotation angle of the handle is detected by detecting the resistance value in the resistance pattern 21 a corresponding to the position of the sliding brush 22.

  The cover member 50 is attached to the case 40 while allowing the rotating body 24 to rotate. The cover member 50 has a generally disk shape and includes a side wall portion 50a formed along the inner peripheral surface of the sensor storage portion 41a. The rotating body 24 is disposed in a space formed inside the side wall 50a. An O-ring 51 is disposed between the rotating body 24 and the cover member 50. Thereby, while ensuring the airtightness in the accommodating part 41, the contact area of the cover member 50 and the rotary body 24 is reduced, and the ease of rotation of the rotary body 24 is ensured.

  A cap member 25 is disposed opposite to the surface of the resistor substrate 21 opposite to the resistance pattern 21a. The cap member 25 is formed of, for example, an insulating resin material and has a shape corresponding to the inner peripheral surface of the storage portion 41. In particular, a stepped portion 25 a corresponding to a stepped portion 41 c formed on the inner peripheral surface of the storage portion 41 is formed at the peripheral portion of the cap member 25, and the stepped portion 25 a and the stepped portion 41 c of the storage portion 41 are The position of the cap member 25 is determined by engaging. Since the cap member 25 can be positioned by the step portion 41c formed in the storage portion 41 as described above, the component of the cap member 25 is surely secured without requiring a component for positioning the cap member 25. Positioning can be performed.

  A plurality (three in this case) of restricting pieces 25 b extending toward the resistor substrate 21 are formed on the surface of the cap member 25 on the resistor substrate 21 side. The tip of the restricting piece 25b is in contact with a position corresponding to the back side of the portion of the resistor substrate 21 where the resistance pattern 21a is formed. The restricting piece 25 b plays a role of restricting the resistance pattern 21 a of the resistor substrate 21 from being separated from the sliding brush 22. By providing such a regulation piece 25b, it is possible to prevent the sliding brush 22 from being separated from the resistance pattern 21a and to appropriately detect the rotation angle of the detection target. The positional relationship between these restricting pieces 25b and the resistance pattern 21a will be described later.

  Furthermore, a slit 25 c through which the conductive terminal 23 fixed to the resistor substrate 21 passes is formed at a predetermined position of the cap member 25. The slit 25 c plays a role of holding the conductive terminal 23. A plurality of conductors 31 (harnesses 30) that are attached to the conductive terminals 23 projecting to the left side shown in FIG. 4 through the slits 25c are held on the surface of the cap member 25 opposite to the resistor substrate 21. The holding member 25d is formed. These holding members 25d are formed in the central region of the cap member 25 so that the conducting wire 31 is not held at a position near the inner peripheral surface of the harness storage portion 41b.

  Hereinafter, the positional relationship between the conductive terminal 23 connected to the resistance pattern 21a and the holding member 25d formed on the cap member 25, and the state of the conductive wire 31 held by the holding member 25d will be described with reference to FIGS. I will explain. FIG. 5 is an exploded perspective view for explaining the components around the cap member 25 of the rotation angle detection device 10 according to the present embodiment. FIG. 6 is a perspective view for explaining the positional relationship between the cap member 25 and the resistor substrate 21 and the positional relationship between the resistor substrate 21 and the sliding brush 22. FIG. 7 is a perspective view when the components shown in FIG. 5 are assembled.

  As shown in FIGS. 5 and 6, in the cap member 25, three slits 25c are formed in the vicinity of the peripheral edge. The conductive terminal 23 connected to the resistance pattern 21a passes through these three slits 25c and protrudes upward as shown in FIGS. As shown in FIGS. 5 and 6, the conductive terminal 23 wraps around the resistance pattern 21a side from the recess 21b formed on the side surface of the resistor substrate 21, and is connected to a part of the resistance pattern 21a. .

  Further, as shown in FIG. 5, the three holding members 25 d are formed on the same straight line in the central region of the cap member 25. Each of the holding members 25d has a substantially C-shape that opens upward as shown in FIG. When the conducting wire 31 is pushed in, each holding member 25d bends the arm portion slightly outward, and returns to its original state after receiving the conducting wire 31. Therefore, the conducting wire 31 can be held by the holding member 25d simply by being pushed into the opening of the holding member 25d. Therefore, it is possible to improve the working efficiency when assembling the rotation angle detection device 10.

  Further, as shown in FIG. 6, the three restricting pieces 25 b formed on the cap member 25 are arranged and are in contact with the surface of the resistor substrate 21. Specifically, the resistor substrate 21 is in contact with the back surface at positions corresponding to the central portion and the vicinity of both ends of the generally semicircular arc-shaped resistance pattern 21a. Thus, by making the regulation piece 25b contact the back surface of the resistance pattern 21a, it is possible to effectively prevent the resistance pattern 21a and the sliding brush 22 from being separated.

  When the cap member 5 or the like having such a configuration is assembled, as shown in FIG. 7, the conductive terminal 23 protrudes upward from the slit 25c of the cap member 25 as shown in FIG. A conductive wire 31 is attached to the surface. The conducting wire 31 attached to the conductive terminal 23 extends from the conductive terminal 23 toward the holding member 25d and is held by the holding member 25d of the cap member 25.

  For this reason, it does not extend directly from the conductive terminal 23 to the upper side shown in FIG. 7, but extends from the periphery of the holding member 25d to the upper side shown in FIG. Therefore, as shown in FIG. 1, when the harness storage portion 41b of the storage portion 41 is sealed with a sealant, the harness 30 is held at a position near the inner peripheral surface of the harness storage portion 41b. Thus, it is possible to prevent the injection of the sealant from being hindered, so that the harness storage portion 41b can be appropriately sealed.

  As described above, according to the rotation angle detection device 10 according to the present embodiment, since the holding member 25d that holds the harness 30 is provided in the central region of the surface of the cap member 25 opposite to the sensor unit 20, the harness 30 Can be secured in the vicinity of the center of the cap member 25 to secure a region where the sealant is injected around the cap member 25, so that the harness 30 can appropriately seal the case without being blocked by the sealant. It becomes possible.

  Further, in the rotation angle detection device 10 according to the present embodiment, the case 40 is provided with the harness storage portion 41b for storing the harness 30 and the harness storage portion 41b is sealed with a sealant. The case 40 can be reliably sealed by the sealant injected into the case 40.

  In addition, this invention is not limited to the said embodiment, It can change and implement variously. In the above-described embodiment, the size, shape, and the like illustrated in the accompanying drawings are not limited to this, and can be appropriately changed within a range in which the effect of the present invention is exhibited. In addition, various modifications can be made without departing from the scope of the object of the present invention.

  For example, in the above-described embodiment, the case where the holding member 25d is formed in the central region of the cap member 25 has been described. However, the position where the holding member 25d is formed is not limited thereto, and may be changed as appropriate. Is possible. That is, in the harness housing part 41b, the central region is not necessarily required as long as a region where the sealant can be injected around the harness 30 (the conductive wire 31) can be secured. The holding member 25d may be disposed at a position separated from the surface of the cap member 25.

It is a perspective view which shows the external appearance of the rotation angle detection apparatus which concerns on one embodiment of this invention. It is a perspective view shown about the state which removed the sealing agent from the case of the rotation angle detection apparatus shown in FIG. It is a side view of the rotation angle detection apparatus which concerns on the said embodiment. It is sectional drawing for demonstrating the internal structure of the rotation angle detection apparatus which concerns on the said embodiment. It is a disassembled perspective view for demonstrating the component parts of the cap member periphery of the rotation angle detection apparatus which concerns on the said embodiment. It is a perspective view for demonstrating the positional relationship of the cap member and resistor board of the rotation angle detection apparatus which concerns on the said embodiment, and the positional relationship of a resistor board | substrate and a sliding brush. It is a perspective view at the time of assembling the component shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Rotation angle detection apparatus 20 Sensor part 21 Resistor board | substrate 21a Resistance pattern 22 Sliding brush 23 Conductive terminal 24 Rotating body 25 Cap member 25b Restriction piece 25c Slit 25d Holding member 30 Harness 31 Conductive wire 32 Covering part 40 Case 41 Storage part 41a Sensor Storage part 41b Harness storage part 42 Disc-shaped part 50 Cover member 60 Sealant

Claims (5)

  Detection means for detecting a rotation angle of a detection target, a case body that houses the detection means, a cap member that holds a conductive terminal that outputs a signal from the detection means and holds a harness attached to the conductive terminal; And a rotation angle detecting device characterized in that a holding means for holding the harness is provided in a central region of a surface of the cap member opposite to the detection means.   The detection means includes a resistor substrate and a sliding member that slides on a resistor forming portion provided on the resistor substrate, and the cap member separates the resistor substrate from the sliding member. The rotation angle detecting device according to claim 1, further comprising a restricting portion for restricting.   The rotation angle detecting device according to claim 2, wherein the restricting portion is brought into contact with a back surface of the resistor forming portion of the resistor substrate.   The rotation angle detection device according to any one of claims 1 to 3, wherein a step portion for positioning the cap member is provided on an inner wall portion of the case body.   5. The storage device according to claim 1, further comprising: a storage unit that stores the harness in the vicinity of the holding unit of the cap member in the case body, and the storage unit is sealed with a sealant. The rotation angle detection device described.

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