JP2009211939A - Position detecting device and actuator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a position detecting device can carry out rotation position detection with high precision. <P>SOLUTION: In a first face 21x of a printed circuit board 21 constituting the position detection device, a print connection wiring 26 extending from an inner phase conductive pattern 22 is guided out to its inside, and the print connection wiring 27 extending from the middle phase conductive pattern 23 is guided out to its inside through an insulating part 22x which is a notched part of the inner phase conductive pattern 22. Jumper wires 30, 31 connected respectively to the respective connection wirings 26, 27 are guided out to a diameter direction outside of the conductive patterns 22 to 24 in a second face 21y of the printed circuit board 21, and electrical connection of the conductive patterns 22 to 24 are carried out via its respective jumper wires 30, 31. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a position detection device that detects a rotational position of a detection target using a conductive pattern and a contact that contacts the conductive pattern, and an actuator provided with the position detection device.

  In this type of position detection device, for example, as shown by a rotary switch in Patent Document 1, a plurality of phases (inner phase, outer phase, intermediate phase) conductive patterns are rotated on a printed circuit board. It is printed in a substantially concentric shape with the axis as its center, and each conductive pattern has a predetermined shape corresponding to each phase. On the other hand, the rotating body to be detected is provided with a contact for each phase, and the contact for each phase is provided so as to be in sliding contact with the rotation of the rotating body on the conductive pattern of the corresponding phase. ing.

And in the type in which each contactor is comprised integrally like patent document 1, predetermined conductive patterns will become conduction | electrical_connection and non-conduction by contact of a contactor, and each contactor is comprised separately. In certain types, when a predetermined contact is brought into conduction or non-conduction in contact with each conductive pattern, the rotational position of the rotating body is detected, and control according to the rotational position of the rotating body is performed. ing.
Japanese Utility Model Publication 5-66844

  By the way, since each conductive pattern is electrically connected to other electrical components at the connection terminal portion located outside the conductive pattern forming portion, the printed connection wiring is provided up to the corresponding connection terminal portion.

  In this case, in Patent Document 1, since the outer-phase conductive pattern is not obstructed up to the corresponding connection terminal portion, the printed connection wiring of the outer-phase conductive pattern directly extends toward the connection terminal portion. However, for the inner periphery side conductive pattern, the outer phase conductive pattern becomes an obstacle until the corresponding connection terminal part, so the inner peripheral side conductive pattern printed connection wiring is connected to the outer phase conductive pattern. A configuration is adopted in which the pattern leads to the outside through a notch portion (insulating portion where no conductive pattern is formed).

  In other words, the inner-phase conductive pattern is used as a common pattern for ground connection due to its small diameter, but the outer-phase conductive pattern for detecting the rotational position of the object to be detected is larger because it has a large diameter. Because it is used, the printed connection wiring of the conductive pattern on the inner peripheral side that passes through the notch portion (insulating part) of the conductive pattern of the outer phase has an adverse effect on the rotational position detection, and the detection can be made more accurate. It was a barrier.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a position detection device capable of detecting a rotational position with high accuracy, and an actuator including the position detection device. It is in.

  In order to solve the above-mentioned problems, the invention described in claim 1 is directed to a printed circuit board in which conductive patterns of an inner phase, an outer phase, and an intermediate phase thereof are formed concentrically, and a detection target on the conductive pattern of each phase. A position detecting device for detecting a rotational position of the detection target based on a combination of contact states of the contactors with respect to the conductive patterns. The inner-phase first connection wiring extending from the inner-phase conductive pattern is led to the inside thereof, and the intermediate-phase first connection wiring extending from the intermediate-phase conductive pattern is arranged in the circumferential direction of the inner-phase conductive pattern. Of the printed circuit board on which the conductive pattern is formed, and the second connection wirings led out to the inside through the insulating parts which are notched portions provided in the parts and connected to the first connection wirings, respectively. It is derived from the second surface opposite to the first surface in the radial direction of the conductive pattern, and is configured to electrically connect the conductive pattern via each second connection wiring. The gist.

  According to the present invention, on the first surface of the printed circuit board, the inner-phase first connection wiring extending from the inner-phase conductive pattern is led to the inner side, and the intermediate-phase first connection wiring extending from the intermediate-phase conductive pattern is The conductive pattern is led out to the inside through a notch portion (insulating portion) provided in a part in the circumferential direction. The second connection wiring connected to each first connection wiring is led out radially outside the conductive pattern on the second surface of the printed circuit board, and the conductive pattern is electrically connected through each second connection wiring. As described above, the printed circuit board of the position detection device is configured. As a result, in the outer phase conductive pattern mainly used for detecting the rotational position, it is not necessary to pass the connection wiring of the inner peripheral side conductive pattern through the notched portion (insulating part), and the notch for that purpose is not electrically connected to the outer phase. Since it is not necessary to provide the pattern, the influence on the rotational position detection can be reduced, and the rotational position can be detected with high accuracy. In addition, since the second connection wiring used here is provided on the second surface opposite to the first surface of the printed circuit board on which the conductive pattern is formed, the second connection wiring is concerned about the conductive pattern. It is possible to arrange in a straight line with the shortest path.

  According to a second aspect of the present invention, in the position detection device according to the first aspect, the conductive pattern of the inner phase is a common pattern for the conductive pattern of the intermediate phase and the outer phase, and the conductive pattern of the intermediate phase and the outer phase. Is composed of a pair, each of which includes a reference position detection unit including an angular width of the insulating portion and a plurality of rotational position detection units provided at equal angular intervals from the reference position detection unit. The gist of the invention is that they are connected in a ring shape, and the conductive patterns thereof are provided with a predetermined angle shifted in the circumferential direction.

  In the present invention, the inner-phase conductive pattern is a common pattern for the intermediate-phase and outer-phase conductive patterns, and the intermediate-phase and outer-phase conductive patterns are configured in pairs, and the angles of the insulating portions of the inner-phase conductive patterns, respectively. One reference position detection unit including a width and a plurality of rotation position detection units provided at equiangular intervals from the reference position detection unit are connected in a ring shape at a non-contact position of the contact, and each conductive pattern is predetermined in the circumferential direction. Provided with an angle shift. That is, it is possible to detect the rotational position with high accuracy using each of the conductive patterns.

According to a third aspect of the present invention, the gist of the position detecting device according to the first or second aspect is that each of the second connection wirings is made of a jumper line.
In this invention, since the jumper line is used as the second connection wiring, it is not necessary to print the conductor related to the second connection wiring on the second surface of the printed circuit board. It is possible to make only the first surface. Thereby, it can contribute to the cost reduction of a printed circuit board.

  According to a fourth aspect of the present invention, in the position detection device according to the third aspect, the second connection wirings made of the jumper wires are provided so as not to cross each other linearly. .

  In the present invention, since the jumper lines used as the second connection wiring are provided so as not to cross each other in a straight line, the jumper lines can be shortened as much as possible, and a short circuit between the jumper lines due to the intersection can be prevented.

  The invention according to claim 5 is an actuator having a structure in which a motor and a speed reduction mechanism are integrally assembled, and the rotation generated by the motor is transmitted to the output shaft via the speed reduction mechanism. The gist is that the position detection device according to any one of 4 is provided to detect the rotational position of the output shaft directly or indirectly.

  In this invention, since the rotational position of the output shaft can be detected with high accuracy by the position detection device described in the above claims, it is possible to contribute to improvement of the motor control accuracy based on the detection.

  ADVANTAGE OF THE INVENTION According to this invention, the position detection apparatus which can perform a highly accurate rotational position detection, and an actuator provided with the position detection apparatus can be provided.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, an embodiment of the invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a vehicle air conditioner including an actuator (position detection device) according to the present invention. As shown in FIG. 1, the vehicle air conditioner includes a fan motor 4, an evaporator 5, a heater core 6, and a ventilation passage in the air conditioning duct 3 in an air conditioning duct 3 having an outside air introduction path 1 and an inside air introduction path 2. And a plurality of actuators 8 for operating the various switching doors 7.

  An outside air introduction path 1 and an inside air introduction path 2 are provided on the inlet side of the air conditioning duct 3, and a fan motor 4 is installed on the downstream side thereof. An evaporator 5 is provided immediately downstream of the fan motor 4, and a heater core 6 is provided further downstream thereof. The air conditioning duct 3 on the downstream side of the heater core 6 is divided into three branch ducts 3a, 3b, and 3c as discharge paths. An R / F door 7a for switching between intake and circulation of outside air is provided at the inlet of the air conditioning duct 3, an air mix door 7b for switching between passage and non-passage of the heater core 6 at the heater core 6, and branch duct 3a. A mode switching door 7c is provided at each of the branch portions to 3c. Each of these various switching doors 7 is provided with an actuator 8 having a corresponding configuration, and the various switching doors 7 are operated by rotation of the output shaft 8a (in this case, rotation of a predetermined angle). It has become.

  Next, as shown in FIGS. 2 and 3, for the actuator 8 that operates the various switching doors 7, the lower case member 10 of the actuator 8 stands from a substantially rectangular bottom portion 10a and an outer peripheral end portion of the bottom portion 10a. The side wall 10b is provided with a square cup shape. An upper case member (not shown) is assembled to the lower case member 10 so as to cover the opening of the lower case member 10 to form a flat rectangular box-like case, and a motor as a drive source is provided inside the case. 11 and the speed reduction mechanism 12 are housed in a drive-coupled state.

  A motor 11 is supported on one side of the lower case member 10 along the side wall 10b. The motor 11 has a rotating shaft 11a that rotates based on rotational driving, and a worm 13 is inserted at the tip thereof. The speed reduction mechanism 12 including the worm 13 includes a worm wheel 14, an intermediate gear 15 and an output gear 16, and the worm wheel 14 and the intermediate gear 15 are rotatably supported by the support shafts 14a and 15a. The output gear 16 is rotatably supported via the output shaft 8 a provided at the center, and these are supported in parallel with the bottom 10 a of the case member 10. The worm 13 that rotates together with the rotating shaft 11a meshes with the worm wheel 14, the worm wheel 14 meshes with the intermediate gear 15, the intermediate gear 15 meshes with the output gear 16, and the rotation of the rotating shaft 11a is decelerated. It is transmitted to the output gear 16. The above-described various switching doors 7 are operated by the output shaft 8 a that rotates together with the output gear 16.

  On the lower surface side (bottom 10a side) of the output gear 16, a printed circuit board 21 constituting the position detection device 20 is fixed to the lower case member 10 with a predetermined distance from the output gear 16. As shown in FIGS. 3 and 4, a circular shaft insertion hole 21 a for inserting the output shaft 8 a is formed in a substantially central portion of the printed circuit board 21.

  On the outer peripheral side of the shaft insertion hole 21a on the first surface 21x (the surface facing the output gear 16) of the printed circuit board 21, an inner-phase conductive pattern 22 and an intermediate layer are sequentially formed from the shaft insertion hole 21a toward the radially outer side. The conductive pattern 23 of the phase and the conductive pattern 24 of the outer phase are printed in a substantially concentric shape with the center O1 of the shaft insertion hole 21a (output shaft 8a) as the center.

  As shown in FIGS. 4 and 5, the inner-phase conductive pattern 22 has a C shape that is cut out at a predetermined angular width, and the cut-out portion that is configured at the predetermined angular width serves as an insulating portion 22x. It is configured.

  The intermediate phase conductive pattern 23 includes one reference position detection unit 23a set to a wide predetermined angular width including the angular width of the insulating portion 22x on the radial extension of the insulating portion 22x of the inner phase conductive pattern 22. And a plurality of rotational position detectors 23b having an angular width narrower than that of the reference position detector 23a, in which case the angular width is set slightly narrower than that of the insulating portion 22x (30 in this embodiment). The two detection portions 23a and 23b are connected to each other by an annular connection portion 23c on the inner peripheral side. An insulating portion 23x is configured between the detection portions 23a and 23b.

  The outer phase conductive pattern 24 has one reference position detection unit 24a set to the same angular width as the reference position detection unit 23a of the intermediate phase conductive pattern 23 on the radial extension of the insulating portion 22x of the inner phase conductive pattern 22. In addition, there are a plurality (30 in this embodiment) of rotational position detectors 24b set at the same angular width as the rotational position detector 23b of the conductive pattern 23 of the intermediate phase. 24a and 24b are mutually connected by the annular connection part 24c of the outer peripheral side. An insulating portion 24x is configured between the detection portions 24a and 24b. In addition, the outer phase conductive pattern 24 is provided with rotational position detectors 23b, 24b shifted from the intermediate phase conductive pattern 23 by approximately half the angular width in the circumferential direction.

  On the other hand, a contact member 25 made of a conductive metal plate is fixed to the lower surface of the output gear 16 (the surface facing the printed circuit board 21), as shown in FIGS. The contact member 25 constitutes the position detection device 20 together with the printed circuit board 21 on which the conductive patterns 22 to 24 are formed.

  The contact member 25 corresponds to an inner-phase contact 25 a corresponding to the inner-phase conductive pattern 22, an intermediate-phase contact 25 b corresponding to the intermediate-phase conductive pattern 23, and an outer-phase conductive pattern 24. The outer phase contact 25c is integrally formed. Each of the contacts 25a to 25c is composed of a pair of contact pieces divided into two parts. The contact member 25 circulates together with the output gear 16 so that the inner-phase contact 25a is on the inner-phase conductive pattern 22 and the intermediate-phase contact 25b is the detection unit for the intermediate-phase conductive pattern 23. The outer-phase contact 25c is in sliding contact with the detection portions 24a and 24b of the outer-phase conductive pattern 24 on 23a and 23b, respectively. At this time, each contact 25a-25c contacts each conductive pattern 22-24 on the same straight line in the radial direction.

  Here, the inner-phase conductive pattern 22 is connected to the ground through a connector terminal 38c, which will be described later, provided corresponding to the conductive pattern 22, and the intermediate-phase and outer-phase conductive patterns 23, 24 are connected to the respective conductive patterns 23, 24. A pulse-like position detection signal is output through connector terminals 38b and 38a, which will be described later.

  Specifically, when each contact 25a-25c slides on each conductive pattern 22-24 with the rotation of the output gear 16 (output shaft 8a), the contact 25a is in contact with the inner-phase conductive pattern 22. When the contacts 25b and 25c come into contact with the rotational position detectors 23b and 24b of the intermediate phase and outer phase conductive patterns 23 and 24, respectively, the conductive patterns 23 and 24 are connected to the ground via the contacts 25a to 25c. Therefore, the position detection signal of each phase becomes L level. On the other hand, when the contacts 25b and 25c are positioned on the insulating portions 23x and 24x of the intermediate-phase and outer-phase conductive patterns 23 and 24, the conductive patterns 23 and 24 are not connected to the ground via the contacts 25a to 25c. The position detection signal of each phase becomes H level. At this time, the intermediate phase and outer phase conductive patterns 23 and 24 are provided so as to be shifted in the circumferential direction by an angular width of approximately half of the rotational position detectors 23b and 24b, so that the two phases are shifted in phase by a predetermined electrical angle. A pulse-like position detection signal (intermediate phase / outer phase) is output.

  Further, in the reference position detectors 23a, 24a of the intermediate phase and outer phase conductive patterns 23, 24, the contacts 25b, 25c are in their reference positions in a state where the contacts 25a are in contact with the inner phase conductive patterns 22. When the detectors 23a and 24a are contacted, the position detection signal of each phase similarly becomes L level. On the other hand, the reference position detectors 23a and 24a have an angle part that wraps with the insulating part 22x of the conductive pattern 22 of the inner phase. In this case, the contacts 25b and 25c come into contact with the reference position detectors 23a and 24a. Even if the contact 25a is positioned on the insulating portion 22x and the printed connection wiring 27 described later, the intermediate-phase and outer-phase conductive patterns 23 and 24 are not connected to the ground, and the position detection signal of each phase is At the same time, it becomes the H level (in this case, the H level having a slightly wide pulse width from the setting of the angular width of the insulating portion 22x). Based on the simultaneous rising of the H level of the two-phase position detection signals, the initial position of the output shaft 8a (switching door 7) is set, for example, the position pulse count is reset.

  As shown in FIGS. 4 and 5, in the first surface 21x of the printed circuit board 21, the inner phase conductive pattern 22 is formed in the inner region A1 between the inner peripheral edge of the inner phase conductive pattern 22 and the shaft insertion hole 21a. Print connection wirings 26 are continuously formed from the inner peripheral edge 22. The printed connection wiring 26 has an L-shape that once extends radially inward from a predetermined portion of the inner peripheral edge of the inner-phase conductive pattern 22 and then bends slightly in a clockwise direction from there. A terminal portion 26a is provided.

  In the intermediate-phase conductive pattern 23, printed connection wirings 27 are continuously formed from the inner periphery of the reference position detection unit 23a. The print connection wiring 27 extends once inward in the radial direction from the circumferential center of the inner peripheral edge of the reference position detection portion 23a to the inner region A1 through the insulating portion 22x of the inner-phase conductive pattern 22, and from there clockwise The inner terminal part 27a is provided in the front-end | tip part.

  Each inner terminal portion 26a, 27a is provided with a pair of outer terminal portions 28a, 29a outside the outer phase conductive pattern 24, respectively. The outer terminal portions 28a and 29a are provided on the same side with respect to the inner terminal portions 26a and 27a and the shaft insertion hole 21a. The outer terminal portions 28a and 29a and the inner terminal portions 26a and 27a are respectively connected to the second surface 21y of the printed circuit board 21 by jumper wires 30 and 31 (indicated by bold broken lines in FIG. 4). . The jumper wires 30 and 31 are provided substantially in parallel so as not to cross each other linearly at the shortest distance.

  6 (a) and 6 (b), the inner peripheral edge of the inner-phase conductive pattern 22, the shaft insertion hole 21a, and the position where the inner terminal portions 26a and 27a are provided for the outer terminal portions 28a and 29a. In the inner area A1 between the outer terminal portions 28a and 29a, the area C1 is substantially C-shaped (except for the shaded portion of the shaft insertion hole 21a as viewed from the outer terminal portions 28a and 29a). It is desirable to set. Thus, if the position of each inner terminal part 26a, 27a is set, the jumper wires 30 and 31 can be arrange | positioned linearly like FIG. In addition, the positions of the inner terminal portions 26a and 27a are preferably set so that the jumper wires 30 and 31 do not cross each other for the purpose of preventing a short circuit between the jumper wires 30 and 31 in advance. Based on this, in the present embodiment, the positions of the outer terminal portions 28a and 29a and the inner terminal portions 26a and 27a are set to suitable positions.

  In the outer phase conductive pattern 24, the printed connection wiring 32 is continuously formed outward from the annular connection portion 24c in the vicinity of the reference position detection portion 24a. The print connection wiring 32 extends linearly between the outer terminal portions 28a and 29a, and a terminal connection terminal portion 33a is provided at the tip.

  On the first surface 21x of the printed circuit board 21, in addition to the terminal connection terminal portion 33a, four (a total of five) terminal connection terminal portions 33b to 33e are formed on the same straight line. The terminal connection terminal portion 33a corresponding to the outer phase conductive pattern 24 is arranged at one end (motor 11 side) arranged in parallel, and the next terminal connection terminal portion 33b corresponds to the intermediate phase conductive pattern 23. The outer terminal portion 29a is connected via the printed connection wiring 29, and the next terminal connecting terminal portion 33c is further connected to the outer terminal portion 28a corresponding to the inner-phase conductive pattern 22 via the printed connection wiring 28. Yes. The remaining two terminal connection terminal portions 33d and 33e are respectively connected to motor power supply terminal portions 34a and 35a provided on the first surface 21x of the printed circuit board 21 at a position slightly away from the motor 11 and printed connection wirings 34 and 35, respectively. Connected through. As shown in FIG. 3, leading ends of lead wires 36 and 37 extending from the motor 11 are connected to the motor power supply terminal portions 34 a and 35 a on the second surface 21 y of the printed board 21, respectively.

  On the second surface 21y of the printed circuit board 21, as shown in FIGS. 4 and 7, five connector terminals 38a to 38e are provided on a substantially rectangular parallelepiped terminal support member 39 extending in the direction in which the terminals 38a to 38e are arranged side by side. Each is inserted and supported. The base end portions of the connector terminals 38a to 38e are connected to the corresponding terminal connection terminal portions 33a to 33e, respectively.

  At one end in the longitudinal direction of the terminal support member 39 (end on the motor 11 side), a holding portion 39a that holds the lead wires 36 and 37 is integrally formed, and the lead wires 36 and 37 are held by the holding portion 39a. The substantially middle portion 37 is held. The holding portion 39a is provided with a slit-like insertion groove 39b on the upper side (on the side opposite to the substrate 21), and lead wires 36 and 37 are inserted into the holding portion 39a from the insertion groove 39b.

  Each of the opening edges of the insertion groove 39b has an R shape or a taper shape so that the lead wires 36 and 37 can be easily inserted. In addition, a protrusion 39c is formed on one opening edge of the insertion groove 39b to make it difficult for the lead wires 36 and 37 to drop off, and the inner edge of the opening of the insertion groove 39b has a right angle. It is difficult for the lines 36 and 37 to fall off. By providing such a holding portion 39a integrally with the terminal support member 39, the printed circuit board 21 can be attached to the case member 10 in a state where the lead wires 36 and 37 are constrained, and this attachment operation is facilitated. .

  As shown in FIGS. 2 and 3, by attaching the printed circuit board 21 to the lower case member 10, the front end sides of the connector terminals 38 a to 38 e are integrally formed on the side wall 10 b of the case member 10. The connector housing portion 10c is arranged at a predetermined position. By connecting an external connector (not shown) to the connector housing portion 10c, the motor 11 and the position detection device 20 are electrically connected to an external control device via the connector terminals 38a to 38e, and power is supplied to the motor 11. And output of a position detection signal from the position detection device 20 is performed. Thereby, the rotational position of the output shaft 8a, that is, the opening position of the switching door 7 in the air conditioning duct 3 is detected, and the drive of the motor 11 is controlled based on this position detection.

Next, characteristic effects of the present embodiment will be described.
(1) On the first surface 21x of the printed circuit board 21 constituting the position detection device 20, the printed connection wiring 26 (first connection wiring) extending from the inner-phase conductive pattern 22 is led out to the inside, and the intermediate-phase conductive pattern A printed connection wiring 27 (first connection wiring) extending from 23 is led out to the inside through an insulating portion 22x which is a notch provided in a part in the circumferential direction of the conductive pattern 22 of the inner phase. Jumper wires 30 and 31 (second connection wires) respectively connected to the connection wires 26 and 27 are led out radially outside the conductive patterns 22 to 24 on the second surface 21y of the printed circuit board 21, and each of the jumper wires Electrical connection of the conductive patterns 22 to 24 is performed via 30 and 31. As a result, in the outer-phase conductive pattern 24 used for detecting the rotational position, it is not necessary to provide a notch portion (insulating portion) and pass the connection wirings 26 and 27 of the inner peripheral conductive patterns 22 and 23. Since it is not necessary to provide the notch in the conductive pattern 24 of the outer phase, the influence on the rotational position detection can be reduced and the rotational position can be detected with high accuracy. Further, since the rotational position of the output shaft 8a can be detected with high accuracy, it is possible to contribute to improvement of the control accuracy of the motor 11 based on the detection. Further, since it is not necessary to provide a cutout portion (insulating portion) in the outer phase conductive pattern 24, the outer phase conductive pattern 24 can be set to be smaller accordingly, which contributes to downsizing of the printed circuit board 21 (position detecting device 20). be able to.

  (2) Since the jumper wires 30 and 31 used on the second surface 21y of the printed circuit board 21 can be routed without worrying about the conductive patterns 22 to 24 formed on the first surface 21x of the printed circuit board 21, As in this embodiment, linear arrangement is possible with the shortest path, and the jumper wires 30 and 31 can be made as short as possible.

(3) Since the jumper lines 30 and 31 are provided so as not to cross each other, a short circuit between the jumper lines 30 and 31 due to the crossing can be prevented in advance.
(4) Since the jumper wires 30 and 31 are used on the second surface 21y of the printed circuit board 21, the conductor need not be printed on the second surface 21y. Therefore, the conductor printed on the conductive patterns 22 to 24 and the like can be printed only on the first surface 21x of the printed circuit board 21, which can contribute to cost reduction of the printed circuit board 21.

In addition, you may change embodiment of this invention as follows.
In the above embodiment, the conductive patterns 22 to 24 are configured as shown in FIG. 4, and a two-phase pulse-like position detection signal is output. The configuration of the pattern may be changed. In this case, the number of intermediate phase conductive patterns may be two or more.

  In the embodiment described above, the jumper wires 30 and 31 arranged on the second surface 21y of the printed circuit board 21 may be printed connection wiring printed on the second surface 21y, for example. In this way, the operation of attaching the jumper wire can be omitted. Also, a printed circuit board as a separate part having printed connection wiring may be laminated on the second surface 21y side of the printed circuit board 21 and electrically connected to each other using a through hole or the like.

In the above embodiment, the holding portion 39a for holding the lead wires 36 and 37 is integrally provided on the terminal support member 39, but the configuration of the holding portion may be changed as appropriate.
For example, an insertion groove 39b for inserting the lead wires 36 and 37 provided in the upper portion of the holding portion 39a may be provided in the side portion of the holding portion 39a as shown in FIG. Good. Moreover, as shown in FIG. 9, it is good also as a mode which comprises as holding | maintenance part 39d which has the insertion hole 39e without an insertion groove, and penetrates the lead wires 36 and 37 from one side of this insertion hole 39e. Further, the holding portion for holding the lead wires 36 and 37 may not be provided integrally with the terminal support member 39 but may be provided, for example, in the case member 10 or the holding portion may be omitted.

  In the above embodiment, the position detection device 20 is configured in the output gear 16 portion to directly detect the rotational position of the output shaft 8a of the actuator 8. However, for example, the intermediate gear 15, the worm wheel 14, and the rotational position detection. Therefore, the position detection device 20 may be configured for a separately used gear, and the rotational position of the output shaft 8a may be indirectly detected.

  In the above embodiment, the position detection device 20 is provided in the actuator 8 of the vehicle air conditioner. However, such a position detection device 20 may be used for an actuator other than the vehicle air conditioner or a device other than the actuator.

It is a schematic block diagram of the vehicle air conditioner in this embodiment. It is a top view of an actuator. It is a top view which shows the state which removed the output gear of the actuator. It is a top view of the printed circuit board which comprises a position detection apparatus. It is a partial enlarged plan view of a printed circuit board. (A) (b) is a top view of the printed circuit board for demonstrating determination of the position of an inner side terminal part. It is a perspective view which shows the connector terminal part of a printed circuit board. It is a perspective view which shows the connector terminal part of the printed circuit board in another example. It is a perspective view which shows the connector terminal part of the printed circuit board in another example.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 8 ... Actuator, 8a ... Output shaft (detection object), 11 ... Motor, 12 ... Deceleration mechanism, 20 ... Position detection device, 21 ... Printed circuit board, 21x ... First surface, 21y ... Second surface, 22 ... Inner phase Conductive pattern, 22x ... insulating portion, 23 ... intermediate phase conductive pattern, 23a ... reference position detecting portion, 23b ... rotational position detecting portion, 24 ... outer phase conductive pattern, 24a ... reference position detecting portion, 24b ... rotating position detecting portion , 25a ... contact for inner phase, 25b ... contact for intermediate phase, 25c ... contact for outer phase, 26,27 ... print connection wiring (first connection wiring), 30, 31 ... jumper wire (second Connection wiring).

Claims (5)

A printed circuit board in which conductive patterns of an inner phase, an outer phase, and an intermediate phase thereof are formed concentrically, and a contact for each phase that slides on the conductive pattern of each phase as the detection target rotates. A position detection device that detects a rotational position of the detection target based on a combination of contact states of the contacts with respect to the conductive patterns,
The inner-phase first connection wiring extending from the inner-phase conductive pattern is led to the inside thereof, and the intermediate-phase first connection wiring extending from the intermediate-phase conductive pattern is partly arranged in the circumferential direction of the inner-phase conductive pattern. A second connection wiring that is led out to the inside through an insulating portion that is a notch provided in the substrate and is connected to each first connection wiring is opposite to the first surface of the printed circuit board on which the conductive pattern is formed. A position detecting device which is configured to be led out radially outside the conductive pattern on the second surface on the side, and to electrically connect the conductive pattern via each second connection wiring . The position detection device according to claim 1,
The inner phase conductive pattern is a common pattern for the intermediate phase and outer phase conductive patterns,
The intermediate phase and outer phase conductive patterns are configured in pairs, each including one reference position detection unit including the angular width of the insulating unit and a plurality of rotational position detection units provided at equal angular intervals from the reference position detection unit. A position detecting device, wherein the contacts are annularly connected at non-contact positions of the contacts, and the conductive patterns are provided with a predetermined angle shift in the circumferential direction. In the position detection device according to claim 1 or 2,
Each of the second connection wirings is made of a jumper line. In the position detection device according to claim 3,
Each of the second connection wirings made of the jumper lines is provided so as not to cross each other linearly. An actuator having a configuration in which a motor and a speed reduction mechanism are integrally assembled and transmitting rotation generated by the motor to the output shaft via the speed reduction mechanism;
An actuator comprising the position detection device according to any one of claims 1 to 4 for directly or indirectly detecting a rotational position of the output shaft.

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