JP2007309789A - Rotation sensor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and surely acquire a terminal structure, wherein the arrangement order of terminals on the connected side to the outside is different from the order of arrangement of terminals on a part connected to a plurality of leads extending from a detection element, in a rotation sensor, with the detection element is connected to the outside via the terminals. <P>SOLUTION: In this rotation sensor 1, including a substrate part 3, comprising resin; the detection element for detecting rotation of a rotator; and a plurality of terminals 4 insert-molded in the substrate part 3, whose ends 4L on one side are used as terminals connected to the detection element, and whose ends 4R on the other side are used as outside connection points connected to the outside, with at least the ends 4L on the side connected to the detection element of the plurality of terminals 4 being arranged, aligned on the approximately same plane; and at least one of the ends is extended to the opposite side of the adjacent other end by detouring around the other adjacent end. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a rotation sensor.

  Conventionally, what is disclosed by patent document 1 is known as a rotation sensor by which a detection element is connected outside via a terminal.

  In the rotation sensor of Patent Document 1, a plurality of leads extending from the detection element are connected to one end sides of a plurality of terminals arranged substantially in parallel, and a connector portion for connecting to the outside on the other end side. The end of each terminal is connected to an external computer unit or the like as a connector terminal electrode.

However, in this type of rotation sensor, the arrangement of connector terminals and the arrangement (arrangement order) of the terminals of the detection elements are different, and a plurality of terminals may not be arranged in parallel as they are. As countermeasures in that case, conventionally, at least one terminal is bent near the center in the longitudinal direction of the terminals, and a plurality of terminals are crossed three-dimensionally, so that the arrangement order of the terminals on the connector side and the detection element side is changed. A different configuration was adopted.
JP-A-9-105757

  However, the configuration in which a plurality of terminals are three-dimensionally crossed at the center in the longitudinal direction is such that the terminals overlap each other. Therefore, after forming the terminals separately, they must be arranged in a predetermined layout. There wasn't.

  For this reason, the above-described configuration is troublesome because it is necessary to arrange a plurality of relatively small terminals with high accuracy, and this contributes to high costs. In addition, since a plurality of terminals that are three-dimensionally crossed with each other are separately molded, when the terminals are insert-molded on a resin substrate or the like, there is a possibility that relative displacement between the terminals occurs.

  Therefore, in the rotation sensor in which the detection element is connected to the outside through the terminal, the arrangement order of the terminals on the side connected to the outside is connected to a plurality of leads extending from the detection element. The purpose is to more easily and reliably obtain a terminal structure that is different from the terminal arrangement order.

  According to the first aspect of the present invention, a base portion made of resin, a detection element for detecting the rotation of the rotating body, a terminal that is insert-molded in the base portion, and has one end connected to the detection element A plurality of terminals serving as external connection points with the other end connected to the outside, and at least the ends of the plurality of terminals connected to the detection element are on substantially the same plane. And at least one of the end portions extends around the other end adjacent to the other end and extends to the opposite side of the other end. .

  According to a second aspect of the present invention, in the rotation sensor according to the first aspect, the detouring end portion detours in a direction perpendicular to the plane.

  According to a third aspect of the present invention, in the rotation sensor according to the first or second aspect, the plurality of terminals are integrally formed as a coupling terminal in which each terminal is coupled by a connecting portion, and the coupling terminal is After the insert molding is performed on the base portion, the connecting portion is cut to divide the coupling terminal into individual terminals.

  According to the first aspect of the present invention, at least one of the end portions on the terminal side connected to the detection element is bypassed on the other end portion adjacent to the end portion and on the opposite side of the adjacent other end portion. Since it is extended, there is no need to make a three-dimensional intersection between the terminals. For this reason, when it is necessary to make the arrangement order of the terminals in the part where the detection element is connected different from the arrangement order of the terminals on the side connected to the outside, a plurality of terminals for correctly connecting the detection element to the outside Can be processed in the final layout or in a state close to that, and moreover, it is also possible to process these multiple terminals at the same time, making the structure easier and less expensive. Can get to.

  According to the second aspect of the present invention, the detouring end portion is detoured in the direction perpendicular to the plane in which the terminal-side end portions connected to the detection elements of the plurality of terminals are arranged, so that detouring is performed within the plane. Compared to the case, the length of the terminal can be shortened.

  According to the invention of claim 3, since a plurality of terminals are integrally formed as coupling terminals, and the coupling terminals are insert-molded into the base portion and then divided into individual terminals, the terminals can be handled more easily. In addition, the relative displacement between the terminals can be suppressed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Here, the rotation sensor mounted in the internal combustion engine etc. of a motor vehicle is illustrated.

  1A and 1B are diagrams illustrating a rotation sensor according to the present embodiment, in which FIG. 1A is a plan view of the rotation sensor, FIG. 1B is a cross-sectional view taken along line AA in FIG. 3 is a plan view of the coupling terminal, FIG. 3 is a diagram showing the Hall IC, (a) is a side view, (b) is a plan view, and FIG. 4 is a diagram showing a state where the coupling terminal is bent. , (A) is a plan view, (b) is a front view, (c) is a side view, FIG. 5 is a plan view showing a state in which the coupling terminal is insert-molded on the base portion, and FIG. FIG. 7 is a side view showing the mounting state of the Hall IC and the coupling terminal, FIG. 8 is an enlarged cross-sectional view of the Hall IC portion of FIG. 7, and FIG. It is a figure which shows the rotation sensor concerning the modification of a form, Comprising: It is sectional drawing corresponding to AA sectional drawing of Fig.1 (a).

  The rotation sensor 1 in this embodiment includes a casing 2 made of a resin (for example, a thermoplastic resin; polyamide or the like). The casing 2 is formed by resin-molding a base portion 3 made of resin with a coating layer 2e.

  The casing 2 is inserted into a mounting flange portion 2a having a through hole (not shown) through which a fastening member such as a bolt is inserted, and a substantially circular shape inserted into a through hole (not shown) provided in the internal combustion engine or the like. A columnar insertion portion 2b and a connector portion 2c projecting outward (downward in FIG. 1A) are provided.

  An annular groove 2d is formed on the outer peripheral wall of the insertion portion 2b, and the outer wall of the insertion portion 2b and the through-hole into which the insertion portion 2b is inserted by the O-ring 10 attached to the groove 2d. A seal is secured between the inner wall and the inner wall.

  A plurality of (three in the present embodiment) terminals 4 are insert-molded in the base 3, and a part of these terminals 4 extends along the mounting direction (insertion direction) of the rotation sensor. It is formed so as to be exposed on 3a. A signal processing circuit 16 is formed by mounting the surface mounting component 6 at a predetermined position of the terminal 4 appearing on the surface 3a.

  A Hall IC (detection element) 8 is attached to the tip of the base body 3 (left side in FIG. 1B). In the present embodiment, a magnetic detection sensor (not shown) and a magnet (not shown) are built in the Hall IC 8, and the magnetic detection sensor (not shown) is a magnet (not shown) and the teeth of the rotating plate 11. By mounting the Hall IC 8 so as to be positioned between the magnetic plate 12 and the magnetic detection sensor (not shown), the rotation of the rotating plate 11 configured as a magnetic body causes the magnet (not shown) and the rotating plate 11 to move. Changes in the magnetic field (magnetic flux density) are detected. In the present embodiment, as shown in FIGS. 1, 3, 6, 7, and 8, the Hall IC 8 includes a magnetic detection sensor in the left position and a magnet in the right position.

  The Hall IC 8 is provided with a plurality of (four in this embodiment) leads 9, and these leads 9 are connected to one end side of the terminal 4 that is insert-molded in the base portion 3. The Hall IC 8 is electrically connected to the signal processing circuit 16, and a predetermined process is performed on the detection signal of the Hall IC 8 in the signal processing circuit 16.

  Further, the other end of each terminal 4 is connected to a harness (not shown), whereby the signal processing circuit 16 and an external microcomputer (not shown) are electrically connected. That is, the other end portion is a terminal pin (external connection point) 13 in the connector portion 2c, and by connecting a harness (not shown) corresponding to each terminal pin 13, the Hall IC 8 and the signal processing circuit 16 are connected. An external microcomputer (not shown) or the like is electrically connected, and the processing result in the signal processing circuit 16 is output to an external microcomputer via a harness (not shown) connected to the connector portion 2c. (Not shown) etc. are output.

  Here, the arrangement structure and manufacturing process of the terminal 4 used in this embodiment will be described in detail. In the following, the arrangement order of the four leads 9 (the arrangement order from the upper side to the lower side in FIG. 3B) is the Hall IC 8 which is a pair of GND terminals 9a, 9a, output terminal 9b, and power supply terminal 9c, respectively. Is connected to one end of the terminal 4, and the arrangement order of the terminal pins 13 in the connector portion 2c is externally connected as an output terminal pin 13b, a GND terminal pin 13a, and a power supply terminal pin 13c.

  In the present embodiment, first, a coupling terminal 5 in which a plurality of terminals 4 are integrated is formed by punching a metal plate. That is, as shown in FIG. 2, the coupling terminal 5 is arranged such that a plurality of elongated plate-like (three in this embodiment) terminals 4 are substantially parallel, and each terminal 4 is connected to a tie bar (connection). Part) 7 and connected to another terminal 4 adjacent thereto. In the present embodiment, these three terminals 4 are an output terminal 4b, a GND terminal 4a, and a power supply terminal 4c in order from the top of FIG.

  On the side to which the Hall IC 8 is connected (left side in FIG. 2), the end 4cL of the power supply terminal 4c is formed linearly among the ends (one end) 4L of each terminal 4.

  Further, the end portion 4aL of the GND terminal 4a is formed with a branch portion 14 having a wide tip portion and bifurcating the tip portion into two.

  A substantially U-shaped detour 15 projecting outward in the longitudinal direction (left side in FIG. 2) is provided at the end 4bL of the output terminal 4b to which the Hall IC 8 is connected, and the tip 4bT of the output terminal 4b is provided. Is positioned on the opposite side of the output terminal 4b with respect to the GND terminal 4a. That is, the output terminal 4b bypasses the end portion 4aL of the GND terminal 4a outward in the longitudinal direction (left side in FIG. 2) on the side to which the Hall IC 8 is connected (left side in FIG. 2). It extends to the opposite side, that is, between the end 4aL of the GND terminal 4a and the end 4cL of the power terminal 4c.

  Further, in the present embodiment, the bypass portion 15 and the branch portion 14 of the end portion 4aL are bent so as to be shifted to the output terminal 4b side (upper side in FIG. 2).

  On the other hand, on the external connection point side (the right side in FIG. 2), the end portions (the other end portion) 4R of each terminal 4 are both formed in a pin shape, and output terminal pin 13b, GND terminal pin 13a, The power supply terminal pin 13c is connected to a corresponding harness (not shown) terminal.

  Next, the coupling terminal 5 is bent and molded as shown in FIG. First, the coupling terminal 5 is bent stepwise so that the terminal pin 13 (end portion 4R) and the end portion 4L of the terminal 4 on the side to which the Hall IC 8 is connected are substantially vertical. Next, the detour portion 15 is bent so as to be substantially perpendicular to the end portion 4L of the terminal 4 on the side to which the Hall IC 8 is connected. At this time, as shown in FIG. 4B, a rectangular surrounding portion 15a surrounded by the detour portion 15 and the end portion 4aL of the GND terminal 4a is formed. In addition, after the detouring part 15 is bent, the coupling terminal 5 may be folded, or the detouring part 15 and the coupling terminal 5 may be bent at the same time.

  Next, the bent coupling terminal 5 is insert-molded in the base body 3. At this time, as shown in FIG. 5, the coupling terminal 5 is insert-molded with the end 4 </ b> L and the tie bar 7 exposed from the surface 3 a of the base body 3. At this time, the detour portion 15 is formed so as to be along the front surface (left side surface in FIG. 1) 3b of the base body portion 3 and at least a part of the detour portion 15 is exposed from the front surface 3b.

  Further, the Hall IC 8 is attached to the base 3 by soldering the leads 9 of the Hall IC 8 to the corresponding terminals 4. Here, in this embodiment, the Hall IC 8 is attached to the base portion 3 by placing the lead 9 on the terminal 4 and soldering. In addition, by providing the detouring part 15 as described above, the arrangement order of the output terminal 4b and the GND terminal 4a is changed at the end part 4L of each terminal 4, and as shown in FIG. In order to be the GND terminal 4a, the output terminal 4b, and the power supply terminal 4c in order, the arrangement order of the terminals 4 and the arrangement order of the leads 9 corresponding thereto are matched. It can be attached in a connected state.

  Further, in this embodiment, the lead 9 extends from the side where the magnetic detection sensor of the Hall IC 8 is located (left side in FIG. 7) toward the side where the magnet is located (right side in FIG. 7), as shown in FIG. The Hall IC 8 is attached to the base body 3 with the lead 9 above the Hall IC 8.

  A plurality of substantially rectangular protrusions 8a are provided on the bottom surface of the Hall IC 8 where the magnet is located (the right side in FIG. 7), and one of the protrusions 8a is provided as shown in FIG. It is inserted into a surrounding portion (inner portion of the detour portion 15) 15 a formed in the detour portion 15, and the Hall IC 8 is locked and held in the detour portion 15. As a result, it is possible to suppress the occurrence of displacement when the Hall IC 8 is attached to the terminal 4.

  Further, a surface mount component 6 such as a capacitor is surface-mounted by reflow soldering or the like at a predetermined position of the terminal 4 exposed on the surface 3a of the base portion 3.

  Thereafter, the tie bar 7 is cut to divide the connecting terminal 5 into individual terminals 4a, 4b and 4c.

  Finally, the casing 2 is formed by insert molding so that the base body 3 is embedded in the casing 2.

  In addition, as shown in FIG. 9, after forming the casing 2 and mounting a plurality of surface mounting components 6 on the surface 3a of the base portion 3 to construct the signal processing circuit 16, the surface 3a is The signal processing circuit 16 may be sealed by covering with a resin (for example, thermosetting resin; epoxy resin or the like) outside the figure, and the seal of the signal processing circuit 16 may be secured. In this case, it is preferable that a thinned portion 17 is formed in the casing 2 so that the Hall IC 8 can be easily mounted.

  According to this embodiment having the above configuration, the bypass portion 15 is provided at the end of the output terminal 4b on the side to which the Hall IC 8 is connected, and the bypass portion 15 is extended to the opposite side of the end 4aL of the GND terminal 4a. By changing the shape of the terminals 4, the arrangement order of the terminals 4 at the part where the Hall ICs 8 are connected is made different from the arrangement order of the terminals 4 on the side connected to the outside without making a three-dimensional intersection between the terminals. Will be able to. Further, by adopting such a shape, when it is necessary to make the arrangement order of the terminals in the part to which the Hall IC 8 is connected different from the arrangement order of the terminals on the side connected to the outside, the Hall IC 8 is made external. It is possible to process a plurality of terminals 4 to be correctly connected in a final layout or a state in which the terminals are laid out, and it is also possible to process the plurality of terminals 4 at the same time. There is also an advantage that it can be obtained more easily and cheaply.

  Moreover, according to this embodiment, since the detouring part 15 is detoured in the substantially vertical direction with respect to the end part 4L on the side connected to the Hall ICs 8 of the plurality of terminals 4, In comparison, the length of the terminal 4 can be shortened.

  Further, since the bypass portion 15 is bent in a substantially vertical direction and the front surface 3b of the base portion 3 is formed along the bypass portion 15, other leads other than the output terminal 9b are connected to the bypass portion 15 (GND terminal in the present embodiment). The Hall IC 8 can be attached to the tip of the front surface 3b of the base portion 3 without contacting the 9a, 9a), and the size of the rotation sensor 1 can be reduced. Further, by inserting the protruding portion 8a of the Hall IC 8 into the surrounding portion 15a formed in the bent detour portion 15, the Hall IC 8 is locked and held in the detour portion 15, so that the Hall IC 8 is The positional deviation can be suppressed, and the Hall IC 8 can be more reliably connected to the terminal 4.

  In addition, according to the present embodiment, the plurality of terminals 4 are integrally formed as the coupling terminals 5, and the coupling terminals 5 are insert-molded into the base portion 3 and then divided into individual terminals 4. In addition to being able to handle easily, the resin moldability is improved, and when the insert molding is performed, the relative positional deviation between the terminals 4 can be suppressed.

  The present invention can be embodied in another embodiment as follows. In other embodiments described below, the same operations and effects as those of the above-described embodiment can be obtained.

  (1) The present invention can also be applied to a rotation sensor having three or more terminals.

  (2) Moreover, in the said embodiment, although the shape of a detour part is carrying out square shape, it can be made not only into the said shape but various shapes, For example, you may make it into a semicircle shape.

  (3) In the above embodiment, only the adjacent terminals are bypassed, but a plurality of terminals including the adjacent terminals may be bypassed.

  Further, technical ideas other than the claims that can be grasped from the above embodiment will be described together with the effects thereof.

  (A) In the rotation sensor according to the second aspect, it is preferable that the detour portion and the detection element are engaged with each other.

  If it carries out like this, when connecting a detection element to a terminal, it can control that the detection element concerned shifts, and it can connect a detection element to a terminal more certainly.

It is a figure which shows the rotation sensor concerning embodiment of this invention, Comprising: (a) is a top view of a rotation sensor, (b) is AA sectional drawing of Fig.1 (a). The top view of the coupling terminal concerning embodiment of this invention. It is a figure which shows Hall IC concerning embodiment of this invention, Comprising: (a) is a side view, (b) is a top view. It is a figure which shows the state which bent the coupling terminal concerning embodiment of this invention, Comprising: (a) is a top view, (b) is a front view, (c) is a side view. The top view which shows the state by which the coupling terminal concerning embodiment of this invention was insert-molded by the base | substrate part. The top view which shows the state which attached Hall IC to the base | substrate part concerning embodiment of this invention. The side view which shows the attachment state of Hall IC and coupling terminal concerning embodiment of this invention. The expanded sectional view of the Hall IC part of Drawing 7 concerning the embodiment of the present invention. It is a figure which shows the rotation sensor concerning the modification of embodiment of this invention, Comprising: Sectional drawing corresponding to AA sectional drawing of Fig.1 (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotation sensor 3 Base part 4 Terminal 4L End part by which Hall IC is connected (end part of one side)
4R End of external connection point (end of the other side)
5 Connecting terminal 7 Tie bar (connecting part)
8 Hall IC (detection element)
11 Rotating plate (Rotating body)
13 Terminal pin (external connection point)
15 Detour part (end part to detour)

Claims (3)

A base portion made of resin, a detection element for detecting the rotation of the rotating body, insert-molded in the base portion, and an end on one side becomes a terminal connected to the detection element, and an end on the other side is external A plurality of terminals that serve as external connection points connected to
At least one end of the plurality of terminals connected to the detection element is arranged on the same plane, and at least one of the ends is connected to the other end adjacent thereto. A rotation sensor that detours and extends to the opposite side of the adjacent other end.   The rotation sensor according to claim 1, wherein the detouring end portion detours in a direction perpendicular to the plane.   The plurality of terminals are integrally formed as a coupling terminal in which each terminal is coupled by a coupling portion. After the coupling terminal is insert-molded to the base portion, the coupling portion is cut to divide the coupling terminal into individual terminals. The rotation sensor according to claim 1, wherein the rotation sensor is formed.

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