JP2015068781A - Detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the entry of water from an engaging hole.SOLUTION: A bank angle sensor 20 is equipped with a case 24 having an opening portion 22 at one end, and a holder 26 fitted with the case 24 to block the opening portion 22. The case 24 is provided with engaging holes 38a and 38b, and guide portions 42a and 42b projecting out to the outside of the case 24. The holder 26 has a base portion 50, a cylinder portion 52 projecting out from the base portion 50, claw portions 40a and 40b provided on an outer peripheral surface 56 of the cylinder portion 52, and cover portions 54a and 54b for covering the engaging holes 38a and 38b. While the case 24 and the holder 26 are assembled, the engaging holes 38a and 38b are blocked by the cover portions 54a and 54b and the guide portions 42a and 42b.

Description

  The present invention relates to a detection device, and more particularly to a detection device having a waterproof function.

  2. Description of the Related Art Conventionally, a detection apparatus that includes a case that accommodates a detection element and a cover that fits into the case, and that integrally couples the case and the cover by engaging the claw portion of the case with the engagement hole of the cover. Widely known.

  In such a detection device, a technical idea has been proposed in which a vertical wall that covers the engagement hole is provided on the outer peripheral surface of the cover, and water is prevented from entering the engagement hole from the horizontal direction (Patent Document 1). reference).

  As shown in FIG. 7, such a case structure 1 includes a case 3 having a flange 2 on the periphery and a cover 5 having a flange 4 on the periphery. The case 3 has a claw portion 7 protruding from the vertical surface 6, and the cover 5 has an engagement arm 9 that hangs slightly away from the vertical surface 8 beyond the flange 4. An engagement hole 10 is formed at the lower end of the cover 5 by the flange 4 and the engagement arm 9. A vertical wall 11 covering the engagement hole 10 is provided on the outer peripheral side of the engagement arm 9.

  As shown in FIG. 8, the flange 4 of the cover 5 is fitted to the flange 2 of the case 3, and the claw portion 7 of the case 3 is engaged with the engagement hole 10 of the cover 5. A cover 5 is attached to 3. At this time, since the vertical wall 11 provided on the engagement arm 9 covers the engagement hole 10 from the side, it is possible to prevent water from entering the engagement hole 10 from the horizontal direction (the arrow X direction in FIG. 8). It is said.

Japanese Utility Model Publication No. 58-131119

  However, in the conventional technique such as Patent Document 1 described above, there is a gap R between the vertical surface 8 of the cover 5 and the vertical wall 11 as can be easily understood from FIG. Therefore, for example, when high-pressure water is injected from a direction perpendicular to the gap R (in the direction of arrow Y in FIG. 8) when performing a car wash operation or the like, the case 3 Water may enter the interior.

  Therefore, in order to solve such a problem, for example, a method of filling the engagement hole with which the claw portion is engaged with an adhesive and sealing the engagement hole with the adhesive can be considered. However, since such a method requires a step of filling the adhesive, there is a concern that the number of work steps and the manufacturing cost increase.

  The present invention has been made in consideration of the above-described problems, and an object thereof is to provide a detection device capable of obtaining a waterproof effect with a simple configuration.

The detection device according to the present invention is:
A sensing element;
A case having an opening at one end and containing a detection element therein;
In a detection device comprising a holder that fits into a case and closes an opening,
The case is provided with an engagement hole and a guide portion that protrudes toward the outside of the case around the engagement hole.
The holder is
A base that covers the opening;
A protrusion protruding from the base and inserted into the case in a state where the case and the holder are assembled; and
A claw portion provided on the outer peripheral surface of the protruding portion and engaged with the engaging hole;
A cover portion that extends from the base portion and is guided by the guide portion and covers the engagement hole,
The engagement hole is blocked by the cover portion and the guide portion in a state where the case and the holder are assembled.

  According to the detection device of the present invention, the engagement hole is closed by the cover portion and the guide portion in a state where the case and the holder are assembled. For this reason, it is possible to prevent water from entering the engagement hole from the horizontal direction and the vertical direction, and it is possible to prevent water from entering the case with a simple configuration.

  Further, since the engagement hole is closed by the cover portion and the guide portion, it is difficult to release the engagement between the claw portion and the engagement hole, and a strong engagement structure can be obtained.

  In the above detection device, a seal member is disposed between the outer peripheral surface of the protrusion and the inner peripheral surface of the case, and the engagement hole is provided on the opening side of the position where the seal member is disposed. It is preferable.

  According to such a structure, a sealing member seals between the outer peripheral surface of the protrusion part of a holder, and the inner peripheral surface of a case. Even if water enters from the engagement hole, the sealing member can prevent water from entering the case.

  In the above detection device, the guide portion is formed of a U-shaped protruding wall, and the cover portion is an overhang portion extending from the base portion and a cover portion main body extending in parallel with the protrusion portion from the tip of the overhang portion. In the state where the case and the holder are assembled, it is preferable that the inner side surface of the protruding wall is in contact with the cover body, and the opening side of the U-shaped protruding wall is covered with the protruding portion.

  According to such a configuration, the inner side surface of the protruding wall abuts the cover body, and the opening side of the U-shaped protruding wall is covered by the overhanging portion, so that the engagement hole is formed by the cover portion and the guide portion. It is blocked more reliably. For this reason, it can prevent reliably that water permeates into the case through the engagement hole. In addition, since the inner side surface of the protruding wall is in contact with the cover body, a strong engagement structure can be obtained, and the claw portion can be protected even when an external force is applied.

  In the above-described detection device, it is preferable that the engagement holes are respectively provided in opposing side wall portions of the case.

  According to such a structure, a case and a holder can be fixed reliably and stably.

  In the above detection device, the detection element is a magnetic detection element, and a step is provided inside the case, and a pendulum with a magnet assembled to the step is rotatably disposed toward the case of the holder. It is preferable that a pressing portion for pressing the pendulum rotatably is provided on one end side.

  According to such a configuration, in addition to the various effects described above, when the rotation of the pendulum is detected by the magnetic detection element, the angle is reliably detected because the pendulum rotates without displacement.

  According to the detection device of the present invention, the engagement hole is blocked by the cover portion and the guide portion in a state where the case and the holder are assembled. It can be an engagement structure.

It is a disassembled perspective view which shows the state which abbreviate | omitted the sensor main body of the bank angle sensor which concerns on embodiment of this invention. It is a front view of the bank angle sensor shown by FIG. It is a side view of the holder which comprises the bank angle sensor shown by FIG. FIG. 2 is a partially broken perspective view of a bank angle sensor shown in FIG. 1 in a state where a case and a holder are fitted. FIG. 5 is a cross-sectional view of the bank angle sensor shown in FIG. 4 taken along line VV. FIG. 6 is a cross-sectional view of the bank angle sensor shown in FIG. 4 taken along the line VI-VI. It is a partially omitted enlarged perspective view of a detection device according to the prior art. It is a partial omission cross-sectional view of a detection device according to the prior art.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a detection apparatus according to the present invention will be described in detail with reference to the accompanying drawings by exemplifying a bank angle sensor mounted on a motorcycle (hereinafter referred to as a vehicle) by exemplifying a preferred embodiment. Needless to say, the present invention is not limited to the bank angle sensor.

  As shown in FIG. 1, the bank angle sensor 20 according to the embodiment of the present invention includes a case 24 having an opening 22 at one end and a holder 26 fitted into the opening 22 of the case 24. Further, as will be described later, a sensor main body 28 (see FIG. 5) housed inside the case 24 is included. Here, the sensor main body 28 is a detection device for detecting that the vehicle has fallen, etc., and performing a fuel cut or power-off of the engine ignition system.

  The case 24 is formed from, for example, a flexible resin. The case 24 includes a bottomed substantially rectangular parallelepiped case main body 30 in which the sensor main body 28 is accommodated, and mounting seats 34 a and 34 b provided on the side walls 32 a and 32 c in the longitudinal direction of the case main body 30. . The mounting seats 34a and 34b are for mounting the case 24 to a desired location of the vehicle via a mounting tool (not shown).

  Rectangular engagement holes 38a and 38b are formed in the side wall portions 32b and 32d in the short direction of the case body 30 so as to face each other. Claw portions 40a and 40b formed in the holder 26 described later are engaged with the engagement holes 38a and 38b, respectively.

  Guide portions 42a and 42b are provided around the engagement holes 38a and 38b so as to protrude from the outer peripheral surfaces of the side wall portions 32b and 32d. As shown in FIGS. 1 and 2, the guide portions 42 a and 42 b are configured by a U-shaped protruding wall 44. The protruding wall 44 surrounds three sides of the rectangular engagement holes 38 a and 38 b, and an upper portion toward the holder 26 is cut away. On the inner wall portion of the case body 30, a step 45 for mounting the rotation shaft 69 of the sensor body 28 is formed as will be described later.

  The mounting seats 34 a and 34 b include a pair of arm portions 48 a and 48 b that protrude outward from the side wall portions 32 a and 32 c in the longitudinal direction of the case body 30. The pair of arm portions 48a and 48b are curved in an arc shape, and their tip portions are separated from each other by a predetermined distance. This is because an unillustrated counterpart, a collar, or a buffer member is inserted between the tip portions that are separated from each other.

  Next, the holder 26 will be described with reference to FIGS. 1 and 3.

  The holder 26 is made of, for example, a flexible resin. The holder 26 includes a base portion 50 having an oval shape in plan view, a cylindrical portion (projecting portion) 52 formed integrally with the base portion 50 below the base portion 50, and a short direction of the base portion 50. Cover portions 54 a and 54 b extending outward from the center and a coupler portion 55 protruding from the upper surface of the base portion 50 are included.

  The cylindrical portion 52 has an oval shape in a horizontal cross section, is slightly smaller than the base portion 50, and extends downward in FIGS. As shown in FIG. 3, in the lower part of the outer peripheral surface 56 of the cylindrical portion 52, a single groove 58 that fits with an O-ring (seal member) 57 is provided around. On the outer peripheral surface 56 of the cylindrical portion 52, claw portions 40a and 40b project from the lateral side surfaces between the base portion 50 and the groove 58, respectively.

  As shown in FIG. 3, the pair of claw portions 40a and 40b are trapezoidal in cross section, the top surfaces thereof are configured as horizontal surfaces 60a and 60b, and the lower portions are configured as tapered surfaces 62a and 62b.

  As shown in FIG. 1, the cover portions 54 a and 54 b are extended portions 64 a and 64 b extending from the center in the short direction of the base portion 50, and the outer periphery of the cylindrical portion 52 from the tips of the extended portions 64 a and 64 b. It consists of flat cover body 66a, 66b that hangs parallel to the surface 56. The cover main bodies 66a and 66b are substantially rectangular and are provided so as to cover the claw portions 40a and 40b protruding from the cylindrical portion 52 while being spaced apart from the outer peripheral surface 56 of the cylindrical portion 52 by a predetermined distance. In the figure, reference numerals 68 a and 68 b indicate a pair of pressing portions extending downward from the lower end portion of the side wall forming the outer peripheral surface 56 of the cylindrical portion 52. As will be described later, the holding portions 68a and 68b are for fixing a rotation shaft 69 constituting the sensor main body 28 in a freely rotatable manner.

  Next, the coupler portion 55 is formed to protrude from the upper surface of the base portion 50. The coupler portion 55 has a cylindrical shape formed integrally with the base portion 50 and the cylindrical portion 52, and the upper portion is formed as a large opening 70, and a recess 72 is formed in a part thereof. Is done. A first terminal 74, a second terminal 76, and a third terminal 78 are disposed below the opening 70 (see FIG. 5). On the other hand, the circuit board 80 is fixed to the lower surface of the base portion 50. One end portion of the first terminal 74 to the third terminal 78 faces the opening 70 of the coupler portion 55, and the other end portion is electrically connected to a circuit (not shown) of the circuit board 80. The first terminal 74 is supplied with power Vcc, the second terminal 76 is for an output signal of the sensor body 28, and the third terminal 78 is a ground terminal. A Hall element (detection element) 82 constituting the sensor body 28 is fixed to the circuit board 80.

  In the figure, reference numeral 84 denotes a pendulum constituting the sensor body 28 that detects the inclination of the vehicle (not shown) in cooperation with the hall element 82. Since the specific configuration of the sensor main body 28 is disclosed in Japanese Patent Laid-Open No. 2006-184263, the description thereof is omitted here to avoid complication.

  The assembling process of the bank angle sensor 20 configured as described above and the operation and effect thereof will be described below.

  In order to assemble the case 24 and the holder 26, as shown in FIG. 6, first, the rotation shaft 69 of the pendulum 84 constituting the sensor body 28 is rotatably mounted on the step portion 45 provided in the case body 30. To do. Next, an O-ring 57 is disposed in the concave groove 58 of the cylindrical portion 52 of the holder 26. In this state, the cylindrical portion 52 of the holder 26 is inserted into the opening 22 of the case main body 30. At the same time, the tips of the cover portions 54 a and 54 b provided at both ends of the holder 26 are inserted from the opening side of the U-shaped protruding wall 44 of the guide portions 42 a and 42 b protruding from the outer peripheral surface of the case body 30.

  The cylindrical portion 52 is further inserted into the opening 22 while guiding the cover portions 54 a and 54 b on the inner surface of the U-shaped protruding wall 44. Part of the side walls 32b, 32d having flexibility is pushed outward by the tapered surfaces 62a, 62b of the claw portions 40a, 40b and deformed outward, and the cylindrical portion 52 and the claw portions 40a, 40b are integrally opened. The inside of the part 22 is lowered. When the horizontal surfaces 60a, 60b of the claw portions 40a, 40b reach the engagement holes 38a, 38b, the claw portions 40a, 40b are fitted into the engagement holes 38a, 38b, and the deformed side wall portions 32b, 32d return to the original shape. . Further, the lower surface of the peripheral edge of the base portion 50 comes into contact with the upper ends of the side wall portions 32 a to 32 d of the case body 30. At that time, the pressing portions 68a and 68b at the lower end of the cylindrical portion 52 press the rotating shaft 69 of the sensor main body 28 from above to fix the rotating shaft 69 rotatably.

  As a result, the claw portions 40a and 40b provided on the outer peripheral surface 56 of the cylindrical portion 52 engage with the engagement holes 38a and 38b provided in the side wall portions 32b and 32d of the case main body 30, respectively, as shown in FIG. As shown, the case 24 and the holder 26 are integrally coupled. That is, the horizontal surfaces 60a and 60b of the claw portions 40a and 40b abut against the edge portions of the engagement holes 38a and 38b, thereby preventing the holder 26 from being extracted from the case 24. In the above example, the side walls 32b and 32d are deformed outward. However, part of the cylindrical portion 52 may be deformed inward as the claw portions 40a and 40b are inserted. , You may combine both deformations. Further, as described above, the case 24 and the holder 26 are integrated so that the pendulum 84 of the sensor body 28 faces the Hall element 82 provided on the circuit board 80.

  As described above, in the state where the case 24 and the holder 26 are assembled, the cover main bodies 66a and 66b of the cover portions 54a and 54b are in contact with the inner side surfaces of the protruding walls 44 of the guide portions 42a and 42b. The overhanging portions 64a and 64b of the cover portions 54a and 54b cover the openings of the U-shaped guide portions 42a and 42b on the side toward the holder 26. For this reason, the engagement holes 38a and 38b are closed by the cover portions 54a and 54b and the guide portions 42a and 42b.

  Next, a power line, a signal line, and a ground line (not shown) are connected to the first terminal 74 to the third terminal 78 of the coupler unit 55, respectively.

  As described above, the bank angle sensor 20 according to the embodiment of the present invention has the opening 22 at one end, the case 24 that houses the sensor main body 28 inside, and the case 24 that fits the opening 22. And a holder 26 for closing. Engagement holes 38 a and 38 b are provided in the case 24, and guide portions 42 a and 42 b that protrude toward the outside of the case 24 are provided around the engagement holes 38 a and 38 b. The holder 26 includes a base portion 50 that covers the opening 22, a cylindrical portion 52 that protrudes from the base portion 50 and is inserted into the case 24, claw portions 40a and 40b that engage with the engagement holes 38a and 38b, and a base. Cover portions 54a and 54b extending from the portion 50 and covering the engagement holes 38a and 38b. With the case 24 and the holder 26 assembled, the engagement holes 38a and 38b are closed by the cover portions 54a and 54b and the guide portions 42a and 42b.

  Since the engagement holes 38a and 38b are closed by the cover portions 54a and 54b and the guide portions 42a and 42b, water can be prevented from entering the engagement holes 38a and 38b from the horizontal direction and from the vertical direction. Infiltration of water can be prevented. That is, a labyrinth structure that bends in a longitudinal section is formed by the engagement holes 38a and 38b, the claw portions 40a and 40b that engage with the engagement holes 38a and 38b, and the upper surface of the protruding wall 44 that constitutes the guide portions 42a and 42b. For this reason, it is possible to prevent water from entering the inside of the case 24 with a simple configuration.

  Further, in order to release the engagement between the claw portions 40a and 40b and the engagement holes 38a and 38b, an operation such as exposing the engagement holes 38a and 38b and pushing the claw portions 40a and 40b with a tool is required. It becomes. For this reason, unless the cover portions 54a and 54b are damaged and removed, it is difficult to release the engagement between the claw portions 40a and 40b and the engagement holes 38a and 38b, and a strong engagement structure can be obtained. .

  Further, an O-ring 57 is disposed between the outer peripheral surface 56 of the cylindrical portion 52 and the inner peripheral surface 62 of the case 24, and the engagement holes 38a and 38b are opened more than the positions where the O-ring 57 is disposed. It is provided on the part 22 side. For this reason, even if water enters from the engagement holes 38a and 38b, the O-ring 57 can prevent water from entering the case 24.

  Further, the guide portions 42 a and 42 b are configured by a U-shaped protruding wall 44. In a state where the case 24 and the holder 26 are assembled, the inner surface of the protruding wall 44 abuts on the cover portion main bodies 66a and 66b of the cover portions 54a and 54b. Furthermore, the opening on the side of the U-shaped protruding wall 44 toward the holder 26 is covered with the overhanging portions 64a and 64b of the cover portions 54a and 54b. Thus, the engagement holes 38a and 38b are closed without being separated by the cover portions 54a and 54b and the guide portions 42a and 42b, so that water can enter the case 24 via the engagement holes 38a and 38b. Can be reliably prevented. In addition, since the cover part main bodies 66a and 66b of the cover parts 54a and 54b are in contact with the inner surface of the protruding wall 44, a strong engagement structure can be obtained, and the claw parts 40a and 40b can be moved even when an external force is applied. Can be protected.

  Further, the engagement holes 38a and 38b are provided in the opposing side wall portions 32b and 32d of the case 24, respectively. For this reason, case 24 and holder 26 can be fixed reliably and stably.

  Further, the pair of arm portions 48a, 48b constituting the mounting seats 34a, 34b are curved in an arc shape, and their tip portions are separated from each other by a predetermined distance. Therefore, it is possible to easily attach to the other party using the gap between these tip portions.

  In addition, although the example which applied this invention to the bank angle sensor 20 was shown as embodiment, the kind of sensor is not restricted to this, It can utilize also as a sensor for accommodating other electronic components. That is, the present invention can be used for various detection devices within the range of the purpose of suppressing the intrusion of water from the engagement holes 38a and 38b.

  The present invention is not limited to the above-described embodiment, and it is naturally possible to adopt various configurations without departing from the gist of the present invention.

20 ... Bank angle sensor 22 ... Opening 24 ... Case 26 ... Holder 28 ... Sensor body 38a, 38b ... Engagement holes 40a, 40b ... Claw part 42a, 42b ... Guide part 44 ... Projection wall 50 ... Base part 52 ... Tube part (Protruding part)
54a, 54b ... cover part 55 ... coupler parts 64a, 64b ... projecting parts 66a, 66b ... cover part main body 69 ... rotating shaft 82 ... Hall element (detection element)
84 ... Pendulum

Claims (5)

A sensing element;
A case having an opening at one end and containing the detection element therein;
In a detection device comprising a holder that fits into the case and closes the opening,
The case is provided with an engagement hole, and a guide portion that protrudes toward the outside of the case is provided around the engagement hole.
The holder is
A base that covers the opening;
A protrusion protruding from the base, and inserted into the case in a state where the case and the holder are assembled;
A claw portion provided on an outer peripheral surface of the protruding portion and engaged with the engaging hole;
A cover portion extending from the base portion and guided by the guide portion and covering the engagement hole,
The detection device, wherein the engagement hole is closed by the cover portion and the guide portion in a state where the case and the holder are assembled. The detection device according to claim 1,
A seal member is disposed between the outer peripheral surface of the protrusion and the inner peripheral surface of the case,
The detection device, wherein the engagement hole is provided closer to the opening than a position where the seal member is disposed. The detection device according to claim 1 or 2,
The guide part comprises a U-shaped protruding wall,
The cover part is composed of a projecting part extending from the base part and a cover part main body extending in parallel with the projecting part from the tip of the projecting part,
In the state where the case and the holder are assembled, the inner side surface of the protruding wall abuts the cover body, and the opening side of the U-shaped protruding wall is covered by the protruding portion. Detection device. In the detection device according to any one of claims 1 to 3,
The detection device according to claim 1, wherein the engagement holes are respectively provided in opposing side wall portions of the case. The detection device according to any one of claims 1 to 4,
The detection element is a magnetic detection element;
A step portion is provided inside the case, and a pendulum with a magnet attached to the step portion is rotatably disposed, and the pendulum is rotatably disposed at one end side of the holder facing the case. A detection device comprising a pressing portion for pressing.

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