JP2017026528A - Rotation angle detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotation angle detection device that can achieve improvement in productivity.SOLUTION: A magnet 3 is configured to rotate relative to a housing 5, and a magnetic detection unit 4 is configured to detect a rotation angle of the magnet 3 relative to the housing 5. A circuit substrate 6 is configured to have the magnetic detection unit 4 mounted, and have a first through-hole 6f and second through-hole 6a formed. An output terminal 7 is formed into a linear shape having an end part 7c and an end part 7d located at a position opposite an end part 7c side provided, and is fixed to the housing 5, in which the end part 7c is inserted into the first through-hole 6f of the circuit substrate 6, and the end part 7d is exposed outside the housing 5. A fixing pin 9 is inserted into the second through-hole 6a of the circuit substrate 6. A solder part 62a is configured to link between the end part 7c of the output terminal 7 and the circuit substrate 6, and electrically connect between the magnetic detection unit 4 and the output terminal 7. A solder part 62b is configured to link between the fixing pin 9 and the circuit substrate 6.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rotation angle detection device.

  There has been proposed a rotation angle detection device including a circuit board on which a magnetic detection unit is mounted, a housing to which the circuit board is fixed, and an output terminal for electrically connecting the circuit board and an external device. (For example, refer to Patent Document 1). In this rotation angle detection device, the circuit board is fixed to the housing by welding pins, and the output terminals are electrically connected to the conductive pattern formed on the circuit board.

JP 2014-2039 A

  By the way, in the manufacturing process of the rotation angle detecting device described in Patent Document 1, the process of fixing the circuit board to the housing with the welding pins, the conductive pattern formed on the circuit board, and the output terminal are soldered and electrically Two processes are required, the process of connecting to On the other hand, in manufacturing such a rotation angle detection device, it is required to simplify the manufacturing process by reducing the number of processes and to improve productivity.

  The present invention has been made in view of the above reasons, and an object of the present invention is to provide a rotation angle detection device capable of improving productivity.

In order to achieve the above object, a rotation angle detection device according to the present invention includes:
A housing;
A detected portion that rotates relative to the housing;
A detection unit for detecting a rotation angle of the detected unit with respect to the housing;
A circuit board on which the detection unit is mounted and first and second through holes are formed;
A first end and a second end located on the opposite side of the first end are formed in a linear shape, and are fixed to the housing, and the first end is the first penetration of the circuit board. An output terminal that is inserted into a hole and the second end is exposed to the outside of the housing;
A fixing pin inserted through the second through hole of the circuit board;
A first conductive portion that connects between the first end of the output terminal and the circuit board and electrically connects the detection portion and the output terminal;
A second conductive portion that connects between the fixing pin and the circuit board.

  According to the present invention, in the step of connecting the circuit board and the output terminal via the first conductive part, the circuit board can be fixed to the fixing pin via the second conductive part. That is, in the step of electrically connecting the circuit board and the output terminal, the circuit board can be fixed to the housing by fixing the circuit board to the fixing pin. Therefore, for example, as compared with the configuration in which the circuit board is fixed to the housing by the welding pins, the manufacturing process can be simplified by reducing the number of processes in manufacturing, and the productivity can be improved.

It is sectional drawing of the rotation angle detection apparatus which concerns on embodiment. It is a top view of the rotation angle detection apparatus which concerns on embodiment. It is sectional drawing for demonstrating the manufacturing method of the rotation angle detection apparatus which concerns on embodiment. It is sectional drawing for demonstrating the manufacturing method of the rotation angle detection apparatus which concerns on embodiment. It is a top view of the rotation angle detection apparatus which concerns on a comparative example. It is sectional drawing for demonstrating the manufacturing method of the rotation angle detection apparatus which concerns on a comparative example. It is sectional drawing for demonstrating the manufacturing method of the rotation angle detection apparatus which concerns on a comparative example. It is sectional drawing of the rotation angle detection apparatus which concerns on a modification. It is a perspective view of the fixed pin concerning a modification. It is a top view of the rotation angle detection apparatus which concerns on a modification. It is sectional drawing of the rotation angle detection apparatus which concerns on a modification.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the rotation angle detection device 1 according to the present embodiment includes a rotation member 2 that works in conjunction with a rotation detection body (not shown), a magnet 3 that is fixed to the rotation member 2, and a magnetic detection unit 4. A circuit board 6, a housing 5, an output terminal 7, and a fixing pin 9 for fixing the circuit board 6 are provided. The rotating member 2 and the magnet 3 rotate about the axis L as a rotation axis.

  The rotating member 2 is made of a thermoplastic resin such as polybutylene terephthalate. The rotating member 2 includes a columnar small diameter portion 2a, a columnar medium diameter portion 2e having a larger diameter than the small diameter portion 2a, a columnar large diameter portion 2c having a diameter larger than the medium diameter portion 2e, Consists of The medium diameter part 2e is connected to one end part in the axis L direction of the small diameter part 2a, and the large diameter part 2c is the other end part opposite to the one end part on the small diameter part 2a side in the axis L direction of the medium diameter part 2e. It is connected to the. The other end of the small-diameter portion 2a opposite to the one end on the medium-diameter portion 2e side in the axis L direction is fitted with a connecting portion (not shown) of the rotation detection body, and the small-diameter portion 2a A connection recess 2b for connecting the rotation detection body is provided.

  The magnet 3 is formed in a substantially cylindrical shape, and in the state where the central axis extending in the thickness direction coincides with the axis L, one end portion on the medium diameter portion 2e side in the axis L direction of the large diameter portion 2c of the rotating member 2 It is being fixed to the other end part on the opposite side. The magnet 3 rotates with the axis L as a rotation axis in conjunction with the rotating member 2. The magnet 3 is magnetized in such a manner that two magnetic poles are arranged in a direction perpendicular to the thickness direction. Further, the rotating member 2 to which the magnet 3 is fixed can be produced by using an insert molding method. Specifically, the rotating member 2 to which the magnet 3 is fixed is obtained by pouring a resin material into the mold in a state where the magnet 3 is disposed in the mold and curing the resin material.

  The magnetic detection unit 4 includes a magnetic detection element such as a Hall IC (Integrated Circuit) or an MR (Magneto-Resistance) element housed in a package formed of a synthetic resin or the like. The magnetic detection element outputs a detection signal corresponding to the strength of the magnetic field that changes as the magnet 3 that rotates in conjunction with the rotating member 2 rotates. The surface 4 a of the magnetic detection unit 4 is orthogonal to the axis L, and is disposed in a state of facing the one surface 3 a on the side opposite to the rotating member 2 side in the thickness direction of the magnet 3. Further, a lead portion (not shown) for taking out a detection signal output from the magnetic detection element housed in the package extends from the magnetic detection portion 4.

  The circuit board 6 includes a hard board 6k formed of an insulating material such as glass epoxy resin, a conductive pattern (not shown) formed on the board 6k, and a first that penetrates in the thickness direction of the board 6k. It has a through hole 6f and a second through hole 6a. As shown in FIG. 2, the circuit board 6 has a shape in which one short side of a rectangle is curved outward as viewed from the thickness direction. Returning to FIG. 1, the circuit board 6 is provided with a magnetic detector 4 and a capacitor (not shown) on one surface side in the thickness direction. A lead portion (not shown) of the magnetic detection unit 4 is electrically connected to a conductive pattern provided on the circuit board 6. The first through hole 6f is formed of metal, and a first land portion 6g electrically connected to the conductive pattern is provided on the outer peripheral portion. The 2nd through-hole 6a is formed from the metal, and the 2nd land part 6h electrically insulated from the conductive pattern is provided in the outer peripheral part. A part of the output terminal 7 is inserted into the first through hole 6f, and a part of the fixing pin 9 is inserted into the second through hole 6a. In addition, as a metal which forms a conductive pattern, the 1st land part 6g, and the 2nd land part 6h, copper etc. with high electrical conductivity and heat conductivity are employable, for example. In addition, the circuit board 6 has two engagement recesses 6e that engage with the protrusions 5m at two positions corresponding to the protrusions 5m described later provided on the housing 5 on the peripheral edge thereof.

  The output terminal 7 is formed in a linear shape including an end (first end) 7c and an end (second end) 7d located on the opposite side of the end 7c. The output terminal 7 is fixed to the housing 5, the end 7 c is inserted into the first through hole 6 f of the circuit board 6, and the end 7 d is exposed to the outside of the housing 5. The output terminal 7 is made of metal, and is fixed to the housing 5 with a part thereof being embedded in the housing 5. The output terminal 7 is located on one end side in the longitudinal direction of the circuit board 6 when viewed from the thickness direction of the circuit board 6. The output terminal 7 includes a bent portion 7a bent in a substantially U shape and an extending portion 7b extending linearly from one end of the bent portion 7a. The output terminal 7 is made of a metal having high conductivity such as copper. The other end portion (first end portion) 7c of the bent portion 7a protrudes in a direction away from the partition wall 5e from the fixing portion AR where the circuit board 6 is fixed in the housing 5. The solder part (first conductive part) 62 a connects between the end part 7 c of the output terminal 7 and the circuit board 6, and electrically connects the magnetic detection part 4 and the output terminal 7. The end portion 7c is fixed to the first land portion 6g of the circuit board 6 via the solder portion 62a while being inserted into the first through hole 6f of the circuit board 6. As a result, the output terminal 7 is electrically connected to the circuit board 6, and the detection signal output from the magnetic detection unit 4 is transmitted to the output terminal 7. Further, as shown in FIG. 2, there are three output terminals 7, and soldering is performed with the other end of the bent portion 7a inserted into each of the three first through holes 6f formed in the circuit board 6. It is fixed by the part 62a.

  Returning to FIG. 1, the housing 5 includes a first cylindrical portion 5d, a second cylindrical portion 5f, a third cylindrical portion 5g, and a partition wall 5e. The second cylindrical portion 5f is continuous with one end portion in the cylindrical axis direction of the first cylindrical portion 5d in a state where the cylindrical axis is along the cylindrical axis direction of the first cylindrical portion 5d. The third cylindrical portion 5g is continuous with the outer wall of the first cylindrical portion 5d and the outer wall of the second cylindrical portion 5f in a state where the cylindrical axis is orthogonal to the cylindrical axis direction of the first cylindrical portion 5d. The partition wall 5e is disposed so as to partition the inside of the first tubular portion 5d and the inside of the second tubular portion 5f at the boundary portion between the first tubular portion 5d and the second tubular portion 5f. A well portion 5n in which a part of the output terminal 7 is exposed at the bottom is formed at the end of the partition wall 5e on the third cylindrical portion 5g side. Further, as shown in FIG. 2, the housing 5 is fixed to a fixed member (not shown) in a portion of the outer wall of the second cylindrical portion 5f where the third cylindrical portion 5g is not provided. Two fixing portions 5h are provided so as to protrude in directions away from each other. The first cylindrical part 5d, the second cylindrical part 5f, the third cylindrical part 5g, the partition wall 5e, and the two fixing parts 5h constituting the housing 5 are all made of a thermoplastic resin material such as polybutylene terephthalate. Are formed in one piece.

  Returning to FIG. 1, the region surrounded by the second cylindrical portion 5 f and the partition wall 5 e constitutes the first storage portion 5 a in which the rotating member 2 and the magnet 3 are stored. The rotating member 2 and the magnet 3 are accommodated in the first accommodating portion 5a so that the magnet 3 is located on the partition wall 5e side.

  A region surrounded by the first cylindrical portion 5d and the partition wall 5e constitutes a second storage portion 5c in which the magnetic detection unit 4 and the circuit board 6 are stored. A portion of the partition wall 5e corresponding to the second storage portion 5c side corresponds to a fixed portion AR where the circuit board 6 in the housing 5 is fixed. The magnetic detection unit 4 and the circuit board 6 are stored in the second storage unit 5c so that the magnetic detection unit 4 is located on the partition wall 5e side with respect to the circuit board 6. Thereby, the magnetism detection part 4 accommodated in the 1st accommodating part 5a and the magnet 3 accommodated in the 2nd accommodating part 5c are arrange | positioned so that it may oppose through the partition 5e.

  The housing 5 is in contact with the circuit board 6 so as to sandwich the circuit board 6 from a direction perpendicular to a virtual connection line connecting the fixing pin 9 and the output terminal 7 when viewed from the thickness direction of the circuit board 6. Projecting part 5m. As shown in FIG. 2, the protruding portions 5 m are provided at two locations corresponding to the peripheral edge portion of the circuit board 6 in the fixing portion AR of the housing 5.

  Returning to FIG. 1, the area surrounded by the third cylindrical portion 5g, the first cylindrical portion 5d and the peripheral wall of the second cylindrical portion 5f is at the end of the signal transmission cable connected to the external device. The recess 5p into which the provided plug (not shown) is inserted is configured. Examples of external equipment include equipment such as an ECU (Engine Control Unit) and a meter. A part of the extended portion 7b of the output terminal 7 protrudes inside the recess 5p, and the output terminal 7 and the plug are electrically connected with the plug of the external device inserted into the recess 5p. Connected. Thereby, the external apparatus can change the connection state with the rotation angle detection apparatus 1 simply by attaching / detaching the plug with respect to the recess 5p.

  An annular washer 8 is attached to the lower end 5b of the second cylindrical portion 5f. The washer 8 is disposed so as to face the lower end 2d of the medium diameter part 2e of the rotating member 2 arranged in the first storage part 5a, and the lower end part 5b of the second cylindrical part 5f is connected to the second cylindrical part 5f. It is being fixed by crimping toward the cylinder axial direction side.

  A sealing member (not shown) is disposed in the second storage portion 5c. The sealing member is made of a resin material and fills the second storage portion 5c. As this resin material, a thermosetting resin such as an epoxy resin or silicone may be employed, or a UV (Ultra Violet) curable resin may be employed. As a result, the magnetic detection unit 4 and the circuit board 6 are prevented from coming into contact with outside air, so that the magnetic detection unit 4 and the circuit board 6 can be prevented from deteriorating.

  The fixing pin 9 is for fixing the circuit board 6 to the housing 5. The fixing pin 9 is formed in a linear shape bent from a metal in a substantially L shape, and a part of the fixing pin 9 is fixed to the housing 5 while being embedded in the housing 5. The fixing pin 9 is located on the other end side opposite to the one end side in the longitudinal direction of the circuit board 6 on which the output terminal 7 is provided when viewed from the thickness direction of the circuit board 6. One end portion (second end portion) 9 a in the extending direction of the fixing pin 9 protrudes from the fixing portion AR of the housing 5 in a direction away from the partition wall 5 e. The solder part (second conductive part) 62 b connects between the fixing pin 9 and the circuit board 6. The end portion 9a of the fixing pin 9 is fixed to the second land portion 6h via the solder portion 62b while being inserted into the second through hole 6a. The fixing pin 9 is made of the same type of metal as that forming the output terminal 7.

  Next, a manufacturing method of the rotation angle detection device 1 according to the present embodiment will be described.

  First, the housing 5 in which a part of each of the output terminal 7 and the fixing pin 9 is embedded is manufactured by using an insert molding method. Specifically, as shown in FIG. 3A, the lower mold 101, the upper mold 102, and the side mold 103 are combined to form a gap SP for filling the resin material 105. At this time, the output terminal 7 and the fixing pin 9 are disposed in the gap SP. A part of the inner wall of the lower mold 101 is provided with a terminal holding groove 101a into which the output terminal 7 is inserted, and a pin holding groove 101b into which the fixing pin 9 is inserted. Further, the side mold 103 is provided with a terminal holding hole 103a into which a part of the output terminal 7 is inserted. The output terminal 7 is disposed in the gap SP in a state where a part of the bent portion 7a is fitted into the terminal holding groove 101a and the distal end portion of the extended portion 7b is inserted into the terminal holding hole 103a. The The fixing pin 9 is disposed in the gap SP with one end of the fixing pin 9 fitted in the pin holding groove 101b.

  Next, the resin material 105 is filled in the space SP in a state where the output terminal 7 and the fixing pin 9 are disposed in the space SP. After filling the gap SP with the resin material 105, the resin material 105 is cooled together with the lower mold 101, the upper mold 102, and the side mold 103 to cure the resin material 105. When the lower mold 101, the upper mold 102, and the side mold 103 are removed from the resin material 105 after the resin material 105 is cured, the output terminal 7 and the fixing pin 9 as shown in FIG. The housing 5 in which each part is embedded is obtained. Here, as shown in FIG. 3A, the well portion 5n of the housing 5 is provided with a terminal holding groove 101a in the lower mold 101 when the housing is manufactured using the insert molding method. This is formed as a secondary result of bringing the portion into contact with the output terminal 7.

  Subsequently, as illustrated in FIG. 4A, the rotating member 2 and the magnet 3 are disposed in the first storage portion 5 a of the housing 5 so that the magnet 3 is positioned in the vicinity of the partition wall 5 e of the housing 5. Thereafter, the washer 8 inserted through the rotary member 2 is inserted into the first storage portion 5a from the side opposite to the partition wall 5e side in the first storage portion 5a, and then the lower end portion 5b of the housing 5 is bent toward the rotary member 2 side. The washer 8 is fixed to the housing 5 by caulking.

  Next, the magnetic detection unit 4 and the circuit board 6 are arranged in the second storage unit 5 c of the housing 5. At this time, the circuit board 6 is arranged such that the surface side on which the magnetic detection unit 4 is disposed is opposed to the partition wall 5e, and as shown by the arrow in FIG. The end portion 7c is inserted, and the end portion 9a of the fixing pin 9 is inserted into the second through hole 6a. Further, as shown in FIG. 2, the circuit board 6 is disposed in the second storage portion 5 c in a state where the engaging recess 6 e is engaged with the protruding portion 5 m protruding from the fixing portion AR of the housing 5.

  Subsequently, as shown in FIG. 4B, for example, a soldering iron S is used to solder the first land portion 6g and the output terminal 7 on the opposite side of the circuit board 6 from the magnetic detection portion 4 side. The second land portion 6h and the fixing pin 9 are welded by the solder portion 62b. As a result, the circuit board 6 is fixed to the housing 5 via the output terminals 7 and the fixing pins 9. Thereafter, the rotation angle detector 1 is completed by filling the second storage portion 5c with a sealing resin (not shown) and curing it.

  Here, in order to describe the characteristics of the method of manufacturing the rotation angle detection device 1 according to the present embodiment, a method of manufacturing the rotation angle detection device 1001 according to the comparative example will be described. In the rotation angle detection device 1001 according to the comparative example, as shown in FIG. 5, a welding pin 1005 m formed of a resin material in a state where the circuit board 1006 is disposed inside the second storage portion 1005 c of the housing 1005, 1009 is fixed to the housing 1005.

  First, similarly to the manufacturing method described in the above embodiment, a housing 1005 in which a part of the output terminal 7 is embedded is manufactured by using an insert molding method. As shown in FIG. 6A, the housing 1005 is provided with welding pins 1005m and 1009 in the second storage portion 1005c.

  Next, as shown in FIG. 6A, the rotating member 2 and the magnet 3 are disposed in the first storage portion 1005a of the housing 1005 and the washer 8 as in the manufacturing method described in the above embodiment. Is fixed to the housing 1005.

  Subsequently, the magnetic detection unit 4 and the circuit board 1006 are disposed in the second storage unit 1005 c of the housing 1005. At this time, as shown by the arrow in FIG. 6A, the circuit board 1006 has the welding pins 1009 and 1005m inserted through the through holes 1006a and 1006e, and the output terminal 7 inserted through the through hole 1006f. Thus, it is disposed in the second storage unit 1005c. Then, as shown in FIG. 6B, the tip portions of the welding pins 1005m and 1009 are in a state of protruding from the surface of the circuit board 1006 opposite to the magnetic detection portion 4 side.

  Thereafter, as shown in FIG. 7A, the circuit board 1006 is fixed to the housing 1005 by crushing the tip portions of the welding pins 1005 m and 1009.

  Next, as shown in FIG. 7B, for example, using a soldering iron S, the land portion 1006g and the output terminal 7 are connected by the solder portion 62a on the opposite side of the circuit board 6 from the magnetic detection portion 4 side. Weld. Thereafter, the second storage unit 1005c is filled with a sealing resin (not shown) and cured to complete the rotation angle detection device 1001.

  As described above, in the method of manufacturing the rotation angle detection device 1001 according to the comparative example, the step of fixing the circuit board 1006 to the housing 1005 with the welding pins 1005m and 1009 and the land portion 1006g of the circuit board 1006 are soldered to the output terminal 7. And fixing with the part 62a. In this manufacturing method, after the circuit board 1006 is arranged in the second storage portion 1005c, these two kinds of processes are performed, whereby the circuit board 1006 is fixed to the housing 1005 and the circuit board 1006 and the output terminal 7 are connected. Both electrical connections are achieved.

  In contrast, in the method of manufacturing the rotation angle detection device 1 according to the present embodiment, as described with reference to FIGS. 3 and 4, the first land portion 6 g and the second land portion 6 h of the circuit board 6 are provided. The process of adhering to the output terminal 7 and the fixing pin 9 through the solder portions 62a and 62b is performed. In this manufacturing method, after the circuit board 6 is disposed in the second storage portion 5c, the circuit board 6 is fixed to the housing 5 and the electrical connection between the circuit board 6 and the output terminal 7 is performed by performing only one type of process. Both connections are achieved. Therefore, as compared with the manufacturing method according to the comparative example, it is possible to simplify the manufacturing process by reducing the number of processes in manufacturing, and it is possible to improve productivity.

  Further, in the rotation angle detection device 1 according to the present embodiment, the housing 5 is viewed from a direction orthogonal to a virtual connection line connecting the fixing pin 9 and the output terminal 7 when viewed from the thickness direction of the circuit board 6. A pair of projecting portions 5m that abut against the circuit board 6 so as to sandwich the circuit board 6 is provided. This restricts the movement of the circuit board 6 relative to the housing 5 during the process of fixing the first land portion 6g and the second land portion 6h of the circuit board 6 to the output terminal 7 and the fixing pin 9. Therefore, it is possible to suppress occurrence of displacement of the circuit board 6 with respect to the housing 5 in the completed product of the rotation angle detection device 1.

  Further, in the rotation angle detection device 1 according to the present embodiment, the fixing pin 9 is made of the same type of metal as the metal forming the output terminal 7. Thus, the solder portion 62a for fixing the output terminal 7 to the first land portion 6g of the circuit board 6 and the solder portion 62b for fixing the second land portion 6h to the fixing pin 9 are of the same component. It can be. Accordingly, the step of fixing the output terminal 7 to the first land portion 6g of the circuit board 6 and the step of fixing the second land portion 6h to the fixing pin 9 can be performed under the same conditions, so that productivity is improved. Can be achieved.

[Modification]
As mentioned above, although embodiment of this invention was described, this invention is not limited by the said embodiment. For example, as in the rotation angle detection device 201 shown in FIG. 8, the end 209 b of the fixing pin 209 opposite to the end 209 a disposed in the second storage portion 5 c of the housing 205 is the first cylindrical shape of the housing 205. The structure exposed to the outer wall of the part 205d may be sufficient. Here, the fixing pin 209 is formed of a metal such as copper as in the first embodiment, and has a higher thermal conductivity than the housing 205. Accordingly, the heat generated in the circuit board 6 is released to the outside of the housing 205 through the fixing pins 9.

  According to this configuration, the heat generated in the circuit board 6 is efficiently released to the outside of the housing 5 through the fixing pins 9, so that the temperature rise of the circuit board 6 can be suppressed.

  In the above-described embodiment, the case where the fixing pin 9 has a substantially L-shape has been described, but the shape of the fixing pin 9 is not limited to this. For example, as shown in FIG. 9, the fixing pin 309 includes a rod-shaped main body 309a and three legs 309b extending from one end in the longitudinal direction of the main body 309a in a direction intersecting the longitudinal direction of the main body 309a, 309c and 309d may be provided. The fixing pin 309 is formed by welding and fixing three sub-fixing pins having a substantially L shape. For example, as shown in FIG. 10, the fixing pin 309 is in a state where the end portions 3091 b, 3091 c, and 3091 d of the three leg portions 309 b, 309 c, 309 d on the opposite side to the main body portion 309 a side are exposed from the outer wall of the housing 305. Be placed.

  According to this configuration, the heat generated in the circuit board 6 is efficiently released to the outside of the housing 5 through the fixing pins 9, so that the temperature rise of the circuit board 6 can be suppressed.

  In the above-described embodiment, the example in which the sealing member is made of the resin material that fills the second storage portion 5c has been described. However, the configuration of the sealing member is not limited thereto. For example, as illustrated in FIG. 11, the sealing member 451 of the rotation angle detection device 401 forms a gap in a part of the second storage portion 5 c of the housing 5, and the partition wall 5 e side in the second storage portion 5 c. The rotation angle detection device 401 may be configured by a plate material that covers the opposite side. The sealing member 451 is formed of a resin material, and is fixed to an end portion of the cylindrical portion 5d opposite to the partition wall 5e via a welding fixing or fixing member (not shown).

  According to this configuration, since the amount of the resin material necessary for the sealing member 451 can be reduced, the rotation angle detector 401 can be reduced in weight.

  In the above-described embodiment, the end 7c of the output terminal 7 and the end 9a of the fixing pin 9 are fixed to the first land portion 6g and the second land portion 6h of the circuit board 6 via the solder portions 62a and 62b. An example to be described. However, the conductive member used for fixing the output terminal 7 and the fixing pin 9 to the circuit board 6 is not limited to solder. For example, the output terminal 7 and the fixing pin 9 may be fixed to the circuit board 6 via a conductive paste such as silver paste.

  In the above-described embodiment, the example in which the protrusions 5m are provided at two locations corresponding to the peripheral edge of the circuit board 6 in the fixing part AR of the housing 5 has been described. The number of the parts 5m is not limited to this. For example, the protruding portion may be provided at a location corresponding to the vicinity of the center portion of the circuit board 6 in the fixing portion AR of the housing 5. In this case, the circuit board 6 may have an engagement hole that engages with the protrusion in the vicinity of the center portion corresponding to the position of the protrusion.

  Further, the projecting portions may be provided at three or more positions in the fixing part AR of the housing 5. In this case, the circuit board 6 should just have the engagement recessed part provided in the peripheral part corresponding to the position of a protrusion part, or the engagement hole provided in the inner side.

  In the above-described embodiment, the example in which the rotating member 2 is formed from a thermoplastic resin has been described. However, the material forming the rotating member 2 is not limited to this. For example, the rotating member 2 may be formed from a thermosetting resin such as a phenol resin. In the above-described embodiment, the example in which the medium diameter portion 2e of the rotating member 2 is cylindrical has been described. However, the shape of the medium diameter portion 2e is not limited to a cylindrical shape, and is, for example, a prismatic shape. May be.

1, 201, 301, 401: Rotation angle detection device, 2: Rotating member, 2a: Small diameter portion, 2b: Connection concave portion, 2c: Large diameter portion, 2d: Lower end, 2e: Medium diameter portion, 3: Magnet (Detected) Part), 3a, 4a: surface, 4: magnetic detection part (detection part), 5: housing, 5a: first storage part, 5b: lower end part, 5c: second storage part, 5d: first cylindrical part, 5e: partition wall, 5f: second cylindrical portion, 5g: third cylindrical portion, 5h: fixing portion, 5n: well portion, 5m: protruding portion, 5p: recess, 6: circuit board, 6a: second penetration Hole, 6e: engaging recess, 6f: first through hole, 6g: first land portion, 6h: second land portion, 6k: substrate, 7: output terminal, 7a: bent portion, 7b: extending portion, 7c, 7d, 9a, 209a, 209b: end, 8: washer, 9, 209, 309: fixing pin, 62a, 62b: solder part, 101: lower metal 101a: terminal holding groove, 101b: pin holding groove, 102: upper mold, 103: side mold, 103a: terminal holding hole, 105: resin material, 309a: main body, 309b, 309c, 309d : Leg, 451: Sealing member, AR: Fixed part, S: Soldering iron, SP: Air gap

Claims (3)

A housing;
A detected portion that rotates relative to the housing;
A detection unit for detecting a rotation angle of the detected unit with respect to the housing;
A circuit board on which the detection unit is mounted and first and second through holes are formed;
A first end and a second end located on the opposite side of the first end are formed in a linear shape, and are fixed to the housing, and the first end is the first penetration of the circuit board. An output terminal that is inserted into a hole and the second end is exposed to the outside of the housing;
A fixing pin inserted through the second through hole of the circuit board;
A first conductive portion that connects between the first end of the output terminal and the circuit board and electrically connects the detection portion and the output terminal;
A second conductive portion that connects between the fixing pin and the circuit board,
Rotation angle detection device. The fixing pin is located on one end side of the circuit board as seen from the thickness direction of the circuit board,
The output terminal is located on the other end side of the circuit board as seen from the thickness direction of the circuit board,
The housing is in contact with the circuit board so as to sandwich the circuit board from a direction orthogonal to a virtual connection line connecting the fixing pin and the output terminal when viewed from the thickness direction of the circuit board. With a protrusion of
The rotation angle detection device according to claim 1. The fixing pin and the output terminal are made of metal,
The fixing pin is formed of the same type of metal as the metal forming the output terminal.
The rotation angle detection device according to claim 1 or 2.