JP5248129B2 - Sensor unit - Google Patents

Description

  The present invention relates to a sensor unit that detects a tilt state, acceleration, and the like of a detection target.

  As a sensor for detecting the tilt state, acceleration state, etc., a detection object made of a magnetic material that is displaced according to the inclination or acceleration of the detection target, and a magnetic detection element that detects the position of the detection object based on the detection magnetism (Means) is known (for example, see Patent Document 1).

In this sensor, a detected object is accommodated in a cylindrical guide container so as to be displaceable, and is arranged close to the magnetic detection element as a detected block. It is mounted on the control board together with the control device.
JP 2005-338018 A

  However, in the case of this conventional sensor, since the detected block is attached together with the detection means (magnetic detection element) on the control board on which electronic components are densely mounted, it is difficult to attach the detected block. Improvement of the efficiency of the attachment work is desired.

  Therefore, the present invention is intended to provide a sensor unit that can be easily attached to a detected block and can improve production efficiency.

The invention according to claim 1, which solves the above problem, includes a detected block (for example, a detected block 17 in an embodiment described later) containing a detected object (for example, a sphere 15 in an embodiment described later), It comprises a pair of detectors (for example, displacement detectors 18a and 18b in the embodiments described later), a detection means for detecting the detected object, and a control board (for example, a control in the embodiments described later ) on which the detection means is mounted. Substrate 11), a housing main body (for example, a housing main body 10a in an embodiment described later), and a housing cover (for example, a housing cover 10b in an embodiment described later) that closes the opening of the housing main body. and, the sensor housing for accommodating the said detection means and the detection block with the control board (e.g., performed later In the sensor unit with a sensor housing 10) in the state, the pair of detectors, is attached so as to face each other in spaced 2 position on the control board, the pair of detection on the control board An elastic member (for example, a rubber elastic body 20 in an embodiment described later) is attached to an intermediate position of the container, and the control board is placed on the housing so that the pair of detectors and the elastic member face the opening side of the housing. The detection block is attached to the inside of the main body, the detection block is supported by a holding member (for example, a bracket 19 in an embodiment described later), and the detection block is detected by the pair of detections on the control board in the housing cover. removably attached via the holding member at a position facing between vessels, positioning the housing cover to the housing body Fixed with fit state, characterized in that the object to be detected blocks were pressed against the elastic member between the pair of detectors.
As a result, the detected block is mounted on the housing cover of the sensor housing separately from the control board, and faces the pair of detectors on the control board in that state.
At the time of maintenance, it is possible to remove the detection block from the sensor housing without removing the control board by removing the holding member from the housing cover .
Further, the detected block is pressed toward the housing cover of the sensor housing by the elastic member.

Invention according to claim 2, in the sensor unit according to claim 1, wherein the sensor unit is attached to the body of a motorcycle, a sensor for detecting a vehicle body inclination state, the detected body is magnetic It is comprised by the metal sphere, The said detection means detects the magnetic change by the said sphere, It is characterized by the above-mentioned.

According to the first aspect of the present invention, the pair of detectors of the detection means are mounted on the control board, and the detected block is located at a position facing the pair of detectors on the control board in the housing cover. Since it is attached, it is not necessary to attach the detected block to a control board having a dense mounting component. As a result, it is easy to attach the detected block and the production efficiency is improved.

According to the first aspect of the present invention, since the detected block can be removed from the sensor housing without removing the control board, the maintainability is improved.

According to the first aspect of the present invention, since the elastic member is attached to the middle position of the pair of detectors on the control board and the detected block is pressed against the elastic member, the detected block and the control board are directly connected at the time of assembly. Thus, the detected block can be stably held on the sensor housing side by the pressing force of the elastic member.

According to the second aspect of the present invention, it is possible to reliably detect the inclination state of the motorcycle having a relatively simple configuration and a large inclination angle.

It will be described below with reference to the implementation form of the invention with reference to the drawings. In the embodiments and reference examples described below, the same portions are denoted by the same reference numerals, and redundant descriptions are omitted.

An embodiment shown in FIGS. 1 to 4 will be described. The sensor unit 1 of this embodiment is configured as an inclination sensor mounted on a motorcycle. FIG. 1 shows a motorcycle equipped with a sensor unit 1, in which 100 is a fuel tank, 101 is a fuel supply pump for supplying fuel from the fuel tank 100 to the engine 102, 14 Is a controller that is provided integrally with the throttle body 103 of the engine 102 and outputs a control signal to each part of the engine 102, the fuel supply pump 101, and the like, and 104 is a battery. The sensor unit 1 outputs a detection signal to the controller 14 when the vehicle body is tilted more than a set angle in the left-right direction, and the controller 14 stops the fuel supply to the fuel supply pump 101 and the fuel injection device 13 in response to the detection signal. A command is output as much as possible. Therefore, the fuel supply to the engine 102 is cut at this time.

2 to 4, reference numeral 10 denotes a sensor housing. The sensor housing 10 includes a substantially rectangular housing body 10 a having an upper opening, and a housing cover 10 b that closes the upper opening of the housing body 10 a. Has been. 3 and 4, the sensor housing 10 is installed on the motorcycle body so that the orientation of the lower side and the upper side in the drawing coincides with the lateral direction of the vehicle body. Note that the sensor housing 10 may be installed in the direction of the upper side and the lower side of the paper in the opposite direction of the vehicle body.
Reference numeral 11 denotes a control board, and reference numeral 12 denotes a connector for connecting an external power wiring or signal wiring to the control board 11. A power supply circuit (not shown) is connected to the connector 12, and a controller 14 for controlling the fuel injection device 13 and the fuel supply pump 101 of the engine is connected as shown in FIG.

  The main body of the sensor unit 1 includes a detected block 17 in which a sphere 15 (detected body) made of a magnetic metal moves in the cylindrical container 16 in accordance with the left and right inclination of the motorcycle to be detected, and a detected block. Displacement detectors 18a and 18b (detection means) for detecting the position of the sphere 15 based on a change in magnetism that changes according to the position of the sphere 15 inside the apparatus. The displacement detectors 18 a and 18 b are configured by, for example, a pair of a magnet and an MR element or a pair of a magnet and a Hall element, and are mounted so as to face each other at two spaced positions on the control board 11. In addition, a viscous fluid for appropriately imparting resistance to the sphere 15 is sealed in the cylindrical container 16 of the detected block 17.

  In the case of this embodiment, the detected block 17 and the displacement detectors 18a and 18b are provided in two sets having the same structure, one is used for detecting inclination during normal use, and the other is used for backup. It has become.

  The control board 11 is disposed on four support pedestals 21 projecting from the inner bottom surface of the housing body 10a, and a housing (main body) is formed by screwing a bolt (not shown) and a nut 22 projecting on each pedestal 21. 10a is fastened and fixed. The two sets of displacement detectors 18a and 18b are arranged on the upper surface side of the control board 11 in this state. A rubber elastic body 20 (elastic member) is bonded and fixed at an intermediate position between each pair of displacement detectors 18a and 18b on the control board 11.

  On the other hand, each detected block 17 is integrally formed with a bracket 19 as a holding member by a resin material or the like. Each detected block 17 is detachably attached to the back surface of the housing cover 10b (the surface facing the inside of the housing body 10a) with screws 23 (see FIG. 4) at the bracket 19 portion. The bracket 19 may be formed separately from the detected block 17 and fixed to each other with an adhesive or the like.

  Specifically, each detected block 17 corresponds to each pair of displacement detectors 18a and 18b on the control board 11, specifically, when the housing cover 10b is finally fixed to the housing body 10a. It is attached to the housing cover 10b so as to be positioned between the pair of displacement detectors 18a and 18b (so that the radial direction of the cylindrical container 16 faces the opposing surface of the displacement detectors 18a and 18a). In the case of this embodiment, the two sets of detected blocks 17 and 17 are disposed on the housing cover 10b so as to be parallel to each other in a separated state. The housing body 10a and the housing cover 10b are formed with a plurality of positioning projections 24 and positioning recesses 25 which are fitted to each other, and the detected blocks to which the pairs of the displacement detectors 18a and 18b correspond by these fittings. 17 is faced with an appropriate position.

When the sensor unit 1 is assembled, the control board 11 on which the displacement detectors 18a and 18b are mounted together with other electronic components is placed on the support base 21 at the bottom of the housing body 10a, and the control board 11 is placed on the nut 22. Is fixed to the housing main body 10a, and two sets of detected blocks 17 are fixed to the back surface of the housing cover 10b by screws 23. Next, the housing body 10a and the housing cover 10b are positioned by fitting the positioning protrusions 24 and the positioning recesses 25, and in this state, the housing body 10a and the housing cover 10b are fixed by screws or the like.
Thus, when the housing cover 10b is fixed to the housing main body 10a, each detected block 17 on the housing cover 10b side is disposed between the corresponding displacement detectors 18a and 18b on the housing main body 10a side, and the displacement detector 18a. , 18b is pressed against the rubber elastic body 20.

  In the sensor unit 1, apart from the displacement detectors 18a and 18b mounted on the control board 11 as described above, the detected block 17 is screwed to the back surface of the housing cover 10b via the bracket 19, and the housing body When the housing cover 10b is finally attached to 10a, the detected block 17 is arranged at the normal position between the displacement detectors 18a and 18b. Compared with the case of attaching to the control board 11 together with 18a, 18b and many other electronic components, the attaching operation of the detected block 17 can be facilitated. Therefore, by adopting the structure of the sensor unit 1, production efficiency can be improved.

  Further, in this sensor unit 1, since the bracket 19 that holds the detected block 17 is fixed to the housing cover 10b by a screw 23 so as to be detachable, it is possible to remove the control board 11 from the housing body 10a during maintenance. Inspection and replacement of the detected block 17 can be easily performed. In particular, in the case of this embodiment, since the detected block 17 is detachably attached to the housing cover 10b side without many electric wirings, there is an advantage that the attachment / detachment work of the detected block 17 becomes easy.

  Furthermore, in this sensor unit 1, when the rubber elastic body 20 is bonded and fixed at a position between the displacement detectors 18a and 18b on the control board 11, and the housing cover 10b is finally attached to the housing body 10a, Since the block to be detected 17 is pressed against the rubber elastic body 20, direct interference between the block to be detected 17 and the control board 11 during assembly can be prevented, and the block to be detected 17 can be mounted. By pressing against the housing cover 10b side through the rubber elastic body 20, the detected block 17 can be stably held without rattling.

FIG. 5 shows a first reference example . The basic configuration of the sensor unit 101 of this reference example is substantially the same as that of the above embodiment, but the rubber elastic body 30 is adhered and fixed to the mounting position of the detection block 17 on the back surface of the housing cover 10b, and the detection target is detected. The block 17 is sandwiched between the rubber elastic body 30 (elastic member) on the housing cover 10b side and the rubber elastic body 20 on the control board 11 side.

  In the case of this sensor unit 101, the detected block 17 is not fixed to the housing cover 10b with screws or the like, but is sandwiched between the upper and lower rubber elastic bodies 30 and 20 between the housing cover 10b and the control board 11. Therefore, the vibration transmitted to the detected block 17 can be absorbed by the upper and lower rubber elastic bodies 30 and 20. Therefore, the movement of the detection body (sphere) inside the detected block 17 is not easily inhibited by vibration, and a stable detection result can be obtained. In particular, it is effective in obtaining a stable detection result when employed in a vehicle such as a motorcycle in which vibrations are frequently input from the engine or road surface.

FIG. 6 shows a second reference example .
In the sensor unit 201 of this reference example , displacement detectors 18a and 18b and a rubber elastic body 20 are attached to the back side of the control board 11 facing the bottom of the housing body 10a, and the displacement detectors 18a and 18b on the bottom side of the housing body 10a. A rubber elastic body 30 for supporting the detected block 17 is bonded and fixed to a position corresponding to (a position facing the rubber elastic body 20 between the displacement detectors 18a and 18b). And the displacement of the control board 11 in the direction away from the bottom part of the housing main body 10a is regulated by a plurality of bolts 40 as regulating means. The detected block 17 is pressed up and down by the rubber elastic bodies 20 and 30, and the pressed state is maintained by the bolt 40 which is a regulating means.
In this reference example , the bolt 40 is used as a restricting means for restricting the displacement of the control board 11 in the separation direction with respect to the sensor housing 10, but the restricting means is not limited to the bolt 40, and a locking part such as a clip, An uneven structure formed integrally with the sensor housing 10 may be used.

  In the case of this sensor unit 201, the control board 11 is placed via the detected block 17 and the upper and lower rubber elastic bodies 20, 30 in a state where the displacement of the control board 11 in the direction away from the bottom of the housing body 10 a is restricted. Since the structure is supported on the bottom of the housing body 10, a dedicated support base (see the support base 21 in FIG. 2) for supporting the control board 11 on the bottom of the housing body 10a is eliminated, and the structure is simple. Can be achieved.

In particular, in the sensor unit 201 of this reference example , a plurality (two sets in this case) of the detected blocks 17 are arranged so as to be separated from each other at the bottom of the housing body 10a, and the control board 11 is connected to the plurality of these blocks. Since it is supported on the bottom of the housing body 10a via the detected block 17 and the rubber elastic bodies 20 and 30, there is an advantage that the holding stability of the control board 11 with respect to the bottom of the housing body 10a is high.

7 to 9 show a third reference example .
Similar to the second reference example, the sensor unit 301 of this reference example has a detected block 317 disposed between the rubber elastic body 30 on the housing body 10a side and the rubber elastic body 20 on the control board 11 side, and a control board. 11 has a structure in which displacement in a direction away from the bottom of the housing body 10a is regulated by a regulating means such as a bolt, but the structure of the detected block 317 is different from that of the second reference example .

That is, the detected block 317 is formed so that the cylindrical container 316 has a substantially V-shaped plan view, and a single sphere 15 (detected body) is movably accommodated therein. Specifically, the cylindrical container 316 includes two extending portions 316a and 316b connected by a right-angled bent portion 316c, and the overall shape thereof is substantially V-shaped. The two extending portions 316a and 316b of the cylindrical container 316 are installed so as to face in directions orthogonal to each other, and the single sphere 15 can move inside depending on the tilted state of the front, rear, left and right of the vehicle body. It is like that. Also in this reference example , a viscous fluid for appropriately imparting resistance to the sphere 15 is sealed in the cylindrical container 316. In this reference example , two extending portions 316a and 316b orthogonal to each other are connected by a bent portion 316c, but the extending portions 316a and 316b may be connected by a curved portion.
Further, at least two sets of displacement detectors 18 a and 18 b mounted on the control board 11 are provided so as to correspond to the two extending portions 316 a and 316 b of the detected block 317.

In the case of the sensor unit 301 of this reference example, the detected block 317 includes two extending portions 316a and 316b connected by a right-angled bent portion 316c, and a single sphere 15 is accommodated therein. Therefore, it is possible to detect the inclination in two directions of the detection target by the single sphere 15. Therefore, the manufacturing cost can be reduced by simplifying the structure.

  In addition to this, since the control board 11 is supported on the bottom of the housing body 10a via the extending parts 316a and 316b extending in two directions and the upper and lower elastic members 20 and 30, the housing body 10a The control board 11 can be stably supported on the bottom of the housing body 10a without providing a support base on the bottom.

  In addition, this invention is not limited to said embodiment, A various design change is possible in the range which does not deviate from the summary. For example, the sensor unit according to the present invention is not limited to an inclination sensor, and may be an acceleration sensor, a vibration sensor, a differential transformer, a displacement sensor, or the like. Further, the detection method of the sensor unit may be one using capacitance or light in addition to the one using magnetism. Further, the form of the detected object may be one in which the sphere moves in the tube, the carrier moves on the slide rail or the ball screw, or the magnetic fluid or dielectric fluid moves in the tube.

1 is a perspective view showing a motorcycle according to an embodiment of the present invention. Sectional drawing of the sensor unit corresponding to the AA cross section of FIG. 3 which shows one Embodiment of this invention . The top view of the housing main body side which removed the housing cover of the sensor housing which shows the embodiment. The bottom view by the side of the housing cover of the sensor housing which shows the same embodiment. Sectional drawing similar to FIG. 2 of the sensor unit which shows a 1st reference example . Sectional drawing similar to FIG. 2 of the sensor unit which shows a 2nd reference example . The top view of the housing main body side which removed the housing cover of the sensor housing which shows a 3rd reference example . The bottom view of the control board which shows the same reference example . Sectional drawing of the sensor unit corresponding to the BB cross section of FIG. 7 which shows the same reference example .

DESCRIPTION OF SYMBOLS 1 ... Sensor unit 10 ... Sensor housing
10a ... Housing body
10b ... housing cover 11 ... control board 15 ... sphere (detected body)
17 ... detected block 18a, 18b ... displacement detector ( detector, detection means)
19 ... Bracket (holding member)
20 ... rubber elastic body (elastic member)

Claims (2)

A detected block containing the detected object; and
A detection means comprising a pair of detectors for detecting the detected object;
A control board on which the detection means is mounted;
In a sensor unit comprising a housing body partially opened and a housing cover for closing the opening of the housing body, the sensor block including the detected block and the detection means together with the control board,
The pair of detectors are attached to two spaced apart positions on the control board, and an elastic member is attached to an intermediate position of the pair of detectors on the control board,
The control board is attached to the inside of the housing body so that the pair of detectors and the elastic member face the opening side of the housing,
The detected block is supported by a holding member, and the detected block is detachably attached to a position of the housing cover facing the pair of detectors on the control board via the holding member,
A sensor unit, wherein the housing cover is fixed to the housing body in a positioned state, and the detected block is pressed against the elastic member between the pair of detectors . The sensor unit is a sensor that is attached to a motorcycle body and detects a tilt state of the vehicle body,
The detected object is composed of a magnetic metal sphere,
The sensor unit according to claim 1, wherein the detection unit detects a magnetic change caused by the sphere.

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