JP3979759B2 - Fall detection switch - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a fall detection switch for detecting the fall of a vehicle such as a motorcycle or an ATV and controlling the engine, for example.
[0002]
[Prior art]
In general, in the case of a detection switch that detects the fall of a motorcycle or the like, a detector such as a reed switch, a Hall IC, a photocoupler, a mechanical switch, and a pendulum that turns these detectors on and off are provided in the case. The cover is covered with a case through a seal member, and the cover is fixed to the case by screws, welding, potting, or the like. A typical fall detection switch is disclosed in, for example, Japanese Utility Model Publication No. 63-10487.
[0003]
As shown in FIGS. 7 and 8, the fall detection switch 51 has a substrate 56 to which a reed switch 54 and a plurality of output cords 55 are connected to a lower case 53 covered with an upper lid 52. A rotating body 58 having three arms 58 a to 58 c is rotatably attached to the lower case 53 via a support shaft 57 in a state of facing the substrate 56. Magnets 59 are embedded and fixed to the two arms 58a and 58b of the rotating body 58, and a weight 60 is fixed to the arm 58c directed downward.
[0004]
And this fall detection switch 51 is attached to a vehicle body via the attachment metal 62 with which the detent | locking pin 61 of the lower case 53 was engaged, and when the rotary body 58 rotates by the fall of a vehicle body, two arms 58a, One of the magnets 59 provided at 58b is opposed to the reed switch 54, and the reed switch 54 is turned on, for example, so that the overturn of the vehicle is detected.
[0005]
[Problems to be solved by the invention]
However, in the fall detection switch 51, the substrate 56 and the rotating body 58 are arranged in parallel to the lower case 53 along the support shaft 57, and the output cord 55 connected to the substrate 56 is drawn out of the lower case 53. Due to the structure, the shape of each component is large and complicated, the shape of the detection switch 51 itself is increased, the number of components is increased, and the number of assembly steps is increased. there were. Further, a seal mechanism is required at a plurality of locations such as between the lower case 53 and the upper lid 52 and a lead-out portion of the output cord 55 from the lower case 53, which makes it easier to cause a decrease in assemblage and is waterproof when attached to the vehicle body. There is a problem that the reliability of the property is inferior.
[0006]
The present invention has been made in view of such circumstances, and the object of the present invention is to reduce the size of the switch itself and to improve the assemblability, and to improve the reliability with respect to waterproofness. To provide a fall detection switch. Another object of the invention according to claim 2, capable of simplifying the support structure of the rotary shaft with claim 1 in addition to the object of the invention described, obtaining performs more reliable fall detection of vibration Rico stable supporting To provide a fall detection switch.
[0007]
[Means for Solving the Problems]
In order to achieve this object, the invention according to claim 1 of the present invention is a bottomed cylindrical case attached to a vehicle, and a pendulum that is rotatably disposed on the bottom side of the case via a rotating shaft. A printed circuit board having a detector arranged in the case and outputting a predetermined signal according to the rotation angle of the pendulum, and a fitting member that seals the opening of the case and has a coupler fitting portion A fitting-side bearing portion that supports a rotating shaft supported by the case-side bearing portion on the fitting member, and provided with a case-side bearing portion that supports at least half of the rotation shaft of the pendulum on the bottom-side inner surface of the case And a terminal connected to the printed circuit board is projected into the coupler fitting portion of the fitting member, and the fitting member has the fitting member side bearing portion at the protruding end portion thereof. Spacer and space And the cap outer into the case is fitted via a sealing member is locked to the case, in formed, the cap is provided on one side surface of the opening side of the case to an outer peripheral surface thereof A protrusion that is engaged with the engagement hole, and the protrusion of the cap is engaged with the engagement hole of the case, whereby the fitting member including the spacer, the sealing material, and the cap opens the case. Is sealed .
[0008]
With this configuration, when the vehicle body falls while the case is attached to the vehicle body, the pendulum disposed in the case rotates in a predetermined direction around the rotation axis, and the printed circuit board is rotated by the rotation of the pendulum. A predetermined signal (falling signal) is output from the detector mounted on the. This fall signal is output to the outside from the terminal protruding into the coupler fitting part of the fitting member fitted in the opening of the case, via the coupler fitted in the fitting part, and the operation of the engine is controlled. Is done.
[0009]
A terminal on which the rotation shaft of the pendulum is supported by a case-side bearing portion on the inner surface of the bottomed cylindrical case and a fitting member-side bearing portion of a fitting member that seals the opening of the case and outputs a fall signal However, since the pendulum, printed circuit board, or fitting member can be efficiently housed and arranged along the longitudinal direction in the case, the switch itself can be reduced in size and the number of parts can be reduced. As a result, the assembly of the switch is improved. Further, the seal is only required between the opening of the case and the fitting member, and the reliability with respect to waterproofness is improved.
[0010]
Also, fitting member includes a spacer having a mating member side bearing part at its projecting end, and fitted cap via the seal member within the outer casing of the spacer, in that it is formed Features. With such a configuration, the fitting member can be fitted into the opening in a sealed state by sequentially fitting the spacer, the sealing material, and the cap into the opening of the case, and the assembly of the switch is further improved. To do.
[0011]
The invention according to claim 2 is characterized in that one end side of the rotating shaft is supported by the fitting member side bearing portion of the fitting member and the other end side of the rotating shaft is supported by the end portion of the printed circuit board. And By configuring in this way, the rotating shaft of the pendulum is supported at both ends by the fitting member side bearing portion and the end portion of the printed circuit board, and a stable rotation operation is obtained and the rotating shaft rotates to the printed circuit board for mounting the detector. The support function of the shaft can be shared, and the support structure of the rotating shaft is simplified.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 6 show one embodiment of the fall detection switch according to the present invention, FIG. 1 is a front view thereof, FIG. 2 is a bottom view thereof, FIG. 3 is a sectional view taken along line AA in FIG. 2 is a cross-sectional view taken along line BB in FIG. 2, FIG. 5 is a cross-sectional view taken along line CC in FIG. 4, and FIG. 6 is a cross-sectional view enlarging portions D and E in FIG.
[0013]
1 to 6, a fall detection switch 1 (hereinafter simply referred to as a switch 1) seals a case 2, a pendulum 3 and a printed circuit board 4 disposed in the case 2, and an opening 2 a of the case 2. And a fitting member 5. The case 2 is formed into a bottomed cylindrical shape having a substantially square cross-section by resin molding, and mounting portions 6 to the vehicle body are integrally formed on both outer surfaces on the bottom wall 2b side. The grommet 7 is fitted and fixed. Further, bearing portions 8 and 9 projecting in the direction of the opening 2a are integrally formed on both inner side surfaces of the case 2 on the bottom wall 2b side, and bearing recesses 8a and 9a are formed in the bearing portions 8 and 9, respectively. .
[0014]
The pendulum 3 is formed, for example, in a substantially disk shape made of metal such as aluminum, and is provided with a substantially fan-shaped notch 3a in a part of the outer peripheral portion of the disk so that one side in the diameter direction is heavy and the other side is light. Is set to A shaft hole 3b (see FIG. 3) is bored at the center position, and both end portions of the rotating shaft 10 inserted through the shaft hole 3b are connected to the bearing recesses of the bearing portions 8 and 9 via washers 11. It is supported by 8a and 9a. Further, a magnet fitting hole 12 (or a magnet fitting recess) is formed on the side of the anti-notch 3a where the weight of the pendulum 3 is heavy, and a columnar magnet 13 is fitted and fixed to the magnet fitting hole 12.
[0015]
The printed circuit board 4 is soldered and fixed to a Hall IC 14 as a detector on one surface side (for example, the pattern side), and three terminal portions connected to the terminals of the Hall IC 14 include terminals 15a. One end of ˜15b is fixed by soldering. The printed circuit board 4 is disposed at a predetermined position in the case 2 by inserting both ends of the printed circuit board 4 into board insertion grooves 16 (see FIG. 3) formed on the inner surfaces of both side walls of the case 2. The Hall IC 14 is mounted on the printed circuit board 4 at a position facing the rotation circumferential line of the magnet 13 of the pendulum 3.
[0016]
The three terminals 15a to 15c are, for example, in a state where the other ends of the terminals 15a and 15c on both sides are directed in the direction of the opening 2a of the case 2 and the one end of the center terminal 15b is bent. In addition, the other end portion is oriented in the direction of the opening 2 a of the case 2. Thereby, the three terminals 15 a to 15 c are set in the positional relationship shown in FIG. 2 in the opening 2 a of the case 2.
[0017]
As shown in FIGS. 4 and 5, the fitting member 5 is formed of a spacer 17, a sealing material 18, and a cap 19, and the spacer 17 has a shape that substantially matches the inner shape of the case 2. The fitting portion 17a is fitted in the case 2 and the bearing portion 17b protrudes toward the bottom wall 2b of the case 2 on one outer peripheral surface of the fitting portion 17a. The fitting portion 17a of the spacer 17 is formed with three terminal insertion holes 20 through which the terminals 15a to 15c are inserted, and a fitting recess 17c is formed on the surface of the fitting portion 17a on the opening 2a side. Is formed.
[0018]
The sealing member 18 made of an elastic material such as rubber and having a fitting hole 18a is arranged on the inner surface of the case 2 in a close fitting state on the surface of the fitting portion 17a of the spacer 17 on the fitting concave portion 17c side. The cap 19 having a fitting hole 19a is arranged on the surface of the sealing material 18 on the opening 2a side in a fitted state in the opening 2a of the case 2. In addition, the sealing material 18 is set to an appropriate material and shape that seals in close contact with the opening 2a of the case 2, and the cap 19 is provided on one side surface of the case 2 on the side of the opening 2a. A protrusion 19b is provided to be locked in the locking hole 21 (see FIG. 5).
[0019]
And the coupler fitting recessed part 22 is formed in the fitting member 5 by the sealing material 18 fitted to the opening 2a of the case 2, the fitting holes 18a and 19a of the cap 19, and the fitting recessed part 17c of the spacer 17. The shape of the coupler fitting recess 22 is set so as to substantially match the outer shape of the coupler 23 (see FIG. 5). As a result, the coupler 23 is fitted into the coupler fitting recess 22 to mechanically connect the coupler 23 and the case 2, and the terminals (not shown) of the coupler 23 and the terminals 15 a to 15 c are electrically connected. Connected.
[0020]
Next, an example of the assembly method and operation of the switch 1 will be described. First, the switch 1 is assembled by setting the opening 2a of the resin-molded case 2 to the upper surface side, and from the opening 2a side, the magnet 13 is fitted and fixed to the magnet fitting hole 12, and the rotary shaft 10 is fixed to the shaft hole 3b. Is inserted, and the pendulum 3 having the washer 11 fitted on both sides of the rotating shaft 10 is inserted, and both ends of the rotating shaft 10 are inserted into the bearing recesses 8a and 9a of the bearing portions 8 and 9 of the case 2. At this time, the rotary shaft 10 is easily fitted and inserted while both ends thereof are positioned in the bearing recesses 8a and 9a.
[0021]
As a result, at least the upper half of the rotating shaft 10 of the pendulum 3 is supported by the bearing portions 8 and 9 of the case 2, and in this state, the Hall IC 14 and one ends of the terminals 15a to 15c are soldered and fixed in advance. Both ends in the width direction are inserted into the board insertion groove 16 of the case 2, and the printed board 4 is arranged in the case 2. With the placement of the printed board 4 in the case 2, the bearing recess 8 a of the bearing portion 8 is closed by the end 4 a of the printed board 4.
[0022]
After the printed circuit board 4 is inserted and arranged in the case 2, the spacer 17 has its bearing portion 17b facing the inside of the case 2 and the terminals 15a to 15c of the printed circuit board 4 are inserted into the terminal insertion holes 20 of the fitting portion 17a. The fitting portion 17a is fitted and disposed in the case 2 while being inserted. By fitting the spacer 17 to the case 2, the bearing recess 9 a of the bearing portion 9 of the case 2 is closed at the upper end of the bearing portion 17 b of the spacer 17, and both ends of the rotating shaft 10 of the pendulum 3 are connected to the bearing of the case 2. The portions 8 and 9 are rotatably supported by the end portion 4 a of the printed circuit board 4 and the bearing portion 17 b of the spacer 17. The mounting of the spacer 17 and the terminals 15a to 15c to the case 2 is not limited to this method. For example, the terminals 15a to 15c are insert-molded into the spacer 17 during production, and the printed circuit board 4 is soldered to the terminals 15a to 15c. After being integrated, it may be fitted into the case 2.
[0023]
When the spacer 17 is fitted to the case 2, the sealing material 18 is fitted, and then the cap 19 is fitted, and the protrusion 19 b of the cap 19 is locked in the locking hole 21 of the case 2. As a result, the opening 2a of the case 2 is sealed by the fitting member 5 including the spacer 17, the sealing material 18 and the cap 19, and the three terminals 15a to 15c protrude into the coupler fitting recess 22. A state switch 1 is obtained.
[0024]
The switch 1 assembled in this way is attached to the vehicle body, for example, with the bottom wall 2b side of the case 2 facing upward and screwed to a predetermined position of the vehicle body with a grommet 7 of the mounting portion 6 and attached to the vehicle body. A coupler 23 to which an output cord (not shown) is connected is fitted into the coupler fitting recess 22 of the switch 1. In the normal state in which the vehicle body does not fall, the switch 1 is located at the position indicated by the solid line in FIG. 4, the magnet 13 faces the Hall IC 14 of the printed circuit board 4, and the magnet 13 generates a magnetic hole. The IC 14 is turned on (or turned off), and a non-falling signal is output via the terminals 15a to 15c, so that, for example, the engine can be operated.
[0025]
On the other hand, when the vehicle body falls, the pendulum 3 of the switch 1 rotates about the rotation shaft 10 as shown by a two-dot chain line in FIG. It will be a position not to. As a result, the Hall IC 14 does not receive the magnetism of the magnet 13 and is turned off (or turned on), and a fall signal is output via the terminals 15a to 15c. For example, the engine cannot be operated. That is, according to the turning operation of the pendulum 3 due to the vehicle falling, the Hall IC 14 as a detector is turned on / off and a non-falling signal or a falling signal is output from the terminals 15a to 15c via the coupler 23. Become.
[0026]
Thus, according to the switch 1 of the above embodiment, the pendulum 3, the printed board 4, and the fitting member 5 are arranged in the case 2 having a bottomed cylindrical shape and substantially the same shape as the coupler 23. The outer shape of the switch 1 itself can be formed in a small size that is substantially the same as the outer shape of the coupler 23. For example, the switch 1 itself can be easily transported and stored, and can be easily taken as a measure for reducing the weight of the vehicle. Can respond.
[0027]
Further, bearing portions 8 and 9 having bearing recesses 8 a and 9 a for supporting the rotating shaft 10 of the pendulum 3 are integrally formed in the bottomed cylindrical case 2, and the bearing recesses 8 a and 9 a are formed on the end of the printed circuit board 4. Since the rotary shaft 10 in the bearing recesses 8a and 9a is rotatably supported by being closed by the portion 4a and the bearing portion 17b of the spacer 17, the printed circuit board 4 and the spacer 17 are inserted into the case 2. The bearing mechanism can be configured only by this, the number of parts in the switch 1 can be reduced, and the shape of each part such as the pendulum 3 and the rotary shaft 10 can be simplified. As a result, an inexpensive switch 1 can be obtained.
[0028]
Further, since the switch 1 can be assembled by inserting or fitting the pendulum 3, the printed circuit board 4, the spacer 17, the seal material 18 and the cap 19 in this order from the opening 2a side into the case 2, the switch 1 itself Assembling property of the battery can be greatly improved, and the manufacturing cost can be reduced. Furthermore, since the terminals 15a to 15c are soldered and fixed to the printed circuit board 3 in advance, and the other ends of the terminals 15a to 15c are projected into the coupler fitting recess 22 provided on the opening 2a side of the case 2, It is no longer necessary to pull out the output cord as in the conventional case, and the switch 1 can be wired simply by fitting the coupler 23 into the coupler fitting recess 22, so that the switch 1 can be easily mounted on the vehicle. You can also.
[0029]
Further, the opening 2a of the case 2 is sealed (sealed) by the sealing material 18 disposed between the spacer 17 and the cap 19, and the terminals 15a to 15c are fitted in a state of being in close contact with the terminal insertion hole 20 of the spacer 17. Therefore, it is not necessary to seal at a plurality of places as in the prior art, and the sealing mechanism can be simplified, and the reliability with respect to waterproofness can be improved. In particular, by attaching the case 2 to the vehicle body with the bottom wall 2a side facing the top surface, it is possible to more reliably prevent water from entering the case 2 and to further improve the reliability of the waterproof property. It is possible to obtain a stable operation over a long period of time.
[0030]
In the above embodiment, the case 2 is provided with bearing recesses 8a and 9a into which substantially the entire rotating shaft 10 is inserted, and the bearing recesses 8a and 9a are provided as the end 4a of the printed circuit board 4 and the bearing 17b of the spacer 17. However, the present invention is not limited to this. For example, a semi-circular bearing recess is provided in the case 2 so that the printed circuit board 4 and the spacer 17 are provided with the bearing portion. A semicircular bearing recess corresponding to the above may be provided. In the above embodiment, the case where both ends of the rotating shaft 10 are supported by the printed circuit board 4 and the spacer 17 has been described. For example, a pair of bearing portions that support both ends of the rotating shaft 10 are formed on the spacer 17. May be.
[0031]
Further, in the above embodiment, the fitting member 5 that seals the opening 2a of the case 2 is formed by the three members of the spacer 17, the sealing material 18 and the cap 19, but for example, all or two of these parts are used. An integrated fitting member may be used, and the shape of each member, the shape of the coupler fitting recess 22, and the like can be appropriately set according to the shape of the coupler 23. In addition, the shape of the pendulum 3 in the above embodiment can be changed as appropriate, for example, by adopting the shape shown by a three-dot chain line in FIG. 4. Various detectors can be used. Furthermore, the present invention is suitable for application to motorcycles and ATVs, but it is of course also applicable to various vehicles such as jet skis, small snow vehicles, and four-wheel vehicles.
[0032]
【The invention's effect】
As described in detail above, according to the first aspect of the present invention, the rotating shaft of the pendulum is on the fitting member side of the fitting member that seals the case-side bearing portion and the case opening in the bottomed cylindrical case. A terminal that is supported by the bearing portion and that outputs a fall signal is provided so as to protrude into the coupler fitting portion on the case opening side. Therefore, a pendulum, a printed board, or a fitting member is provided in the case having substantially the same shape as the coupler. The switch itself can be reduced in size, the number of parts can be reduced and the assembly of the switch can be improved, and the seal portion can be connected to the case opening and the fitting member. The reliability with respect to the waterproofness of the switch can be improved.
[0033]
In addition to the above effect, the fitting member can be fitted into the opening in a sealed state by sequentially fitting a spacer, a sealing material, and a cap as fitting members into the opening of the case. Assemblability can be further improved.
[0034]
Further, according to the second aspect of the invention, the effect of the invention according to claim 1 Symbol placement, since the rotation shaft of the pendulum is supported at both ends by the end of the fitting member side bearing part and the printed circuit board, the pendulum In addition to providing a stable rotation operation, the printed circuit board for mounting the detector can also be used for the support function of the rotating shaft, and the support structure of the rotating shaft can be further simplified. .
[Brief description of the drawings]
FIG. 1 is a front view showing an embodiment of a fall detection switch according to the present invention. FIG. 2 is a bottom view thereof. FIG. 3 is a cross-sectional view taken along line AA in FIG. FIG. 5 is a cross-sectional view taken along line C-C in FIG. 4. FIG. 6 is a cross-sectional view enlarging portions D and E in FIG. 5. FIG. 7 is a partial cross-sectional view of a conventional fall detection switch. [Fig. 8] Front view with the top cover and mounting bracket removed. [Explanation of symbols]
1 ..... Fall detection switch 2 ... Case 2a ... Opening 2b ... Bottom wall 3 ... ... Pendulum 3a ... Notch 3b ... Shaft hole 4 ... Printed circuit board 4a ... End Part 5 ········· Fitting members 8, 9 ······· Bearing portions 8a and 9a ··· Bearing concave portion 10 ······ Rotating shaft 13 ···・ ・ ・ ・ ・ ・ Magnet 14 ・ ・ ・ ・ ・ ・ ・ ・ Hall IC
15a to 15c ... terminal 17 ... spacer 17a ... fitting part 17b ... bearing part 17c ... fitting recess 18 ········ Sealing material 18a ································· Cap 19a ···································・ Coupler fitting recess 23 ... Coupler

Claims (2)

A bottomed cylindrical case attached to the vehicle, a pendulum that is pivotably disposed on the bottom side of the case via a rotation shaft, and a predetermined signal that is disposed in the case according to the pivot angle of the pendulum A printed circuit board having a detector that outputs the output, and a fitting member that seals the opening of the case and has a coupler fitting portion,
A case-side bearing portion that supports at least half of the rotating shaft of the pendulum is provided on the inner surface of the bottom side of the case, and a fitting member-side bearing portion that supports the rotating shaft supported by the case-side bearing portion is provided on the fitting member. In addition, a spacer connected to the printed circuit board is projected into the coupler fitting portion of the fitting member, and the fitting member includes a spacer having the fitting member side bearing portion at the protruding end portion. A cap fitted into the case outside the spacer via a sealing material and locked to the case. The cap has one outer peripheral surface on one side of the case opening side. A protrusion for locking in the locking hole provided on the cap, and by locking the protrusion of the cap with the locking hole of the case, the fitting member comprising the spacer, the sealing material, and the cap Open the case Fall detection switch but characterized in that it is sealed.   2. The overturn according to claim 1, wherein one end side of the rotating shaft is supported by a fitting member side bearing portion of the fitting member, and the other end side is supported by an end portion of the printed circuit board. Detection switch.

Images