JP6051407B2 - Switch device - Google Patents

Description

  The present invention relates to a switch device for a vehicle that is mainly used for controlling the extinction of a stop lamp when operating a brake pedal of an automobile.

  2. Description of the Related Art In recent years, various switch devices have been used for controlling a stop lamp accompanying a brake pedal operation, in which a stop lamp is turned on when a brake pedal is depressed and turned off when the brake pedal is released.

  Such a conventional switch device will be described with reference to FIGS.

  FIG. 7 is a sectional view of a conventional switch device, and FIG. 8 is a partial perspective view. In FIG. 7, 1 is a substantially box-shaped case made of an insulating resin, 2 is a substantially semi-cylindrical shape, and N poles on the upper and lower surfaces. A magnet provided with an S pole, the magnet 2 is mounted on the inner bottom surface of the case 1, and a magnetic field is formed in the vertical direction by the magnet 2.

  3 is a wiring board having a plurality of wiring patterns (not shown) formed on the front and back surfaces, 4 is a magnetic detection means such as a Hall IC, and this magnetic detection means 4 is mounted and mounted on the lower end of the wiring board 3; Oppositely arranged with a predetermined gap on the side surface of the magnet 2.

  Further, 5 is a switching means such as a relay, 6 is a substantially L-shaped terminal such as a copper alloy, and the lower ends of the plurality of terminals 6 are mounted on the wiring board 3 by soldering or the like. The magnetic detection means 4 and the switching means 5 are electrically connected via a wiring pattern.

  Further, reference numeral 7 denotes an insulating resin cover. The cover 7 covers the upper surface of the case 1, and the upper ends of the plurality of terminals 6 extend into the rectangular tube portion 7A on the upper surface of the cover 7, whereby the switch device 8 is configured. Yes.

  Then, as shown in the perspective view of FIG. 6, the switch device 8 configured in this way is opposed to the magnetic body 21 fixed to the arm 20A of the brake pedal 20 of the automobile with a predetermined gap therebetween. The upper ends of the plurality of terminals 6 are connected to a vehicle stop lamp, an electronic circuit (not shown), or the like by lead wires, connectors (not shown), or the like.

  When the brake pedal 20 is not depressed in this way, the magnet 2 is close to the magnetic body 21 and the magnet 2 becomes stronger. As shown in the waveform diagram of FIG. Since the magnetic detection means 4 detects a magnetic force of about 10 mT, for example, the switching means 5 connected thereto is turned OFF and the stop lamp is turned off.

  In the above configuration, when the brake pedal 20 is depressed, the arm 20A rotates about the rotation shaft 20B, and the magnetic body 21 moves away from the switch device 8 in which the magnet 2 is housed. The magnetic detection means 4 detects this gradually decreasing magnetic flux density.

  When this change in magnetism becomes a predetermined value or less, for example, a magnetic flux density of about 0 mT, an ON signal is output from the magnetic detection means 4 to the switching means 5, the switching means 5 is turned on, and the stop lamp is lit.

  That is, by operating the brake pedal 20, the magnetic body 21 facing the magnet 2 of the switch device 8 is moved in the direction of approaching or separating, and the distance between the magnet 2 and the magnetic body 21 is changed. When the magnetism detecting means 4 detects the magnetism of the changing magnet 2 and reaches a predetermined magnetic flux density, for example, a magnetic flux density of about 3 to -3 mT, the switching means 5 is turned off or on to turn off the stop lamp. It was configured as follows.

  As prior art document information related to the invention of this application, for example, Patent Document 1 is known.

JP 2012-199047 A

  However, in the above conventional switch device, when the brake pedal 20 is operated, the change in the magnetic flux density of the magnet 2 detected by the magnetic detection means 4 with the movement of the magnetic body 21 is relatively gradual. As shown in FIG. 9, for example, when the switching means 5 is switched at a magnetic flux density of about 3 to -3 mT, the distance L between the magnet 2 and the magnetic body 21 between them, that is, the operation amount of the brake pedal 20 becomes large. Therefore, there is a problem that it is difficult to perform accurate detection.

  The present invention solves such a conventional problem, and an object of the present invention is to provide a switch device that can perform highly accurate detection and perform reliable operation.

  In order to achieve the above object, the present invention is directed to a direction of a magnetic detection means disposed opposite to a lower end of a substantially columnar magnet mounted on a bottom surface of a case and formed with a magnetic field in a vertical direction with a predetermined gap on a side surface. The switch device is configured by providing a substantially triangular prism-shaped inclined portion that protrudes into the area, and the area of the bottom surface of the magnet is increased by the substantially triangular prism-shaped inclined portion at the lower end of the magnet, with a small operation amount of the brake pedal, Since the magnetic flux density of the magnet detected by the magnetic detection means is greatly changed, it is possible to perform a highly accurate detection and to obtain a switch device capable of reliable operation.

  As described above, according to the present invention, it is possible to obtain an advantageous effect that a switch device that can perform highly accurate detection and can be reliably operated can be realized.

Sectional drawing of the switch apparatus by one embodiment of this invention Exploded perspective view Partial perspective view Waveform diagram Partial perspective view according to another embodiment Brake pedal perspective view Sectional view of a conventional switch device Partial perspective view Waveform diagram

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

(Embodiment)
1 is a cross-sectional view of a switch device according to an embodiment of the present invention, FIG. 2 is an exploded perspective view thereof, and FIG. 3 is a partial perspective view thereof. In the same figure, 11 is a substantially box-shaped polybutylene terephthalate or poly A case made of an insulating resin such as oxymethylene, 12 is a substantially semi-cylindrical magnet made of ferrite, Nd-Fe-B alloy or the like, and has N and S poles on the top and bottom surfaces, and a magnetic field is formed in the vertical direction. A magnet 12 is attached to the inner bottom surface of the case 11.

  Reference numeral 13 denotes a wiring board such as paper phenol or glass-containing epoxy, and a plurality of wiring patterns (not shown) are formed on the front and rear surfaces by copper foil or the like. The detection means 14 is mounted and mounted, and is disposed opposite to the side surface of the magnet 12 with a predetermined gap.

  The magnetic detection means 14 includes a plurality of magnetic elements 14A and 14B arranged vertically such as a Hall element that detects the magnetic force of the magnet 12 formed in the vertical direction in the longitudinal direction perpendicular to the detection surface. In addition, the lower end of the magnet 12 is provided with a substantially triangular prism-shaped inclined portion 12A projecting in the direction of the magnetic detection means 14 so that the area of the lower surface of the magnet 12 is large.

  Further, 15 is a switching means such as a contact type relay or a semiconductor relay using GaN, SiC or the like, 16 is a substantially L-shaped terminal such as a copper alloy, and the lower ends of the plurality of terminals 16 are wired by soldering or the like The magnetic element 14A of the magnetic detection means 14 is mounted on the plurality of terminals 16 through the switching means 15 and the magnetic elements 14A of the magnetic detection means 14 are connected to the plurality of terminals 16B. The magnetic element 14B is electrically connected directly via a wiring pattern.

  Reference numeral 17 denotes an insulating resin cover. The cover 17 covers the upper surface of the case 11, and the upper ends of the plurality of terminals 16 extend into the rectangular tube portion 17 </ b> A on the upper surface of the cover 17 to constitute the switch device 18. Yes.

  Then, as shown in the perspective view of FIG. 6, the switch device 18 configured in this manner is opposed to the magnetic body 21 fixed to the arm 20 </ b> A of the brake pedal 20 of the automobile with a predetermined gap therebetween. The upper ends of the plurality of terminals 16 are connected to a vehicle stop lamp, an electronic circuit (not shown), and the like by lead wires, connectors (not shown), and the like.

  In this state where the brake pedal 20 is not depressed, the magnet 12 having a large bottom surface area and a large magnetic flux density is close to the magnetic body 21 by the substantially triangular prism-shaped inclined portion 12A protruding from the lower end. As shown in the waveform diagram of FIG. 4, the magnetic element 14A of the magnetic detecting means 14 detects a magnetic force perpendicular to the detection surface of the magnetic field, for example, a large magnetic flux density of about 20 mT. Therefore, an OFF signal is output from the magnetic detection means 14 to the switching means 15, the switching means 15 is turned OFF, and the stop lamp connected to the terminal 16A is turned off.

  The magnetic element 14B of the magnetic detection means 14 also detects a large magnetic flux density of about 20 mT, but an ON signal is output from the magnetic detection means 14 to the terminal 16B connected to the electronic circuit, contrary to the above. This is output to an electronic circuit, and for example, a so-called auto-cruise device that keeps the traveling speed of the vehicle constant regardless of depression of the accelerator pedal is in an operable state.

  In the above configuration, when the brake pedal 20 is depressed, the arm 20A rotates about the rotation shaft 20B, and the magnetic body 21 moves away from the switch device 18 in which the magnet 12 is housed. The magnetic detection means 14 detects this magnetic flux density.

  At this time, the magnetic elements 14A and 14B of the magnetic detection means 14 are vertically arranged. For example, the magnetic element 14A is disposed in the middle of the magnet 12 and the magnetic element 14B is opposed to the end of the magnet 12, and Since the magnitude of the magnetic force perpendicular to the detection surface of the magnetic field to be detected is different, the change in the magnetic flux density waveform M detected by the magnetic element 14A is more rapid than the magnetic flux density waveform N detected by the magnetic element 14B. It will decrease.

  When the change in magnetism is equal to or less than a predetermined value, for example, when the change in the waveform M detected by the magnetic element 14A reaches a magnetic flux density of about 0 mT, an ON signal is output from the magnetic detection means 14 to the switching means 15 and the switching means 15 is turned on, and the stop lamp connected to the terminal 16A is turned on.

  After that, when the brake pedal 20 is further depressed, the magnetic flux density of the waveform N detected by the magnetic element 14B is also around 0 mT, so that an OFF signal is output from the magnetic detection means 14 to the terminal 16B, which is output from the terminal 16B. It is output to the electronic circuit and the vehicle's auto cruise device stops.

  That is, by operating the brake pedal 20, the magnetic body 21 facing the magnet 12 of the switch device 18 is moved in the direction of approaching or separating, and the magnetic elements 14 </ b> A and 14 </ b> B of the magnetism detecting means 14 detect with this movement. Depending on the change in magnetism of the magnet 12, the switching means 15 is turned OFF or ON, or the magnetic detection means 14 outputs an ON or OFF signal so that the stop lamp is turned off or the auto cruise device is controlled. It is configured.

  At this time, in the present invention, a substantially triangular prism-shaped inclined portion 12A protruding in the direction of the magnetic detecting means 14 is provided at the lower end of the substantially semi-cylindrical magnet 12, and the area of the lower surface of the magnet 12 is increased. Thus, since the magnetic flux density of the magnet 12 detected by the magnetic detection means 14 is large, it is possible to perform highly accurate detection by greatly changing the magnetic flux density with a small operation amount of the brake pedal 20. ing.

  That is, the area of the lower surface of the magnet 12 is increased by the substantially triangular prism-shaped inclined portion 12A at the lower end of the magnet 12, and as shown in FIG. 4, the waveform M or N changes rapidly from a large magnetic flux density of about 20 mT. When the switching means 15 is switched at a magnetic flux density of about 3 to -3 mT, for example, by detecting the magnetic force perpendicular to the 12 magnetic field detection surface, a small distance between the magnet 12 and the magnetic body 21 therebetween. S, i.e., a small amount of operation of the brake pedal 20, can be detected with high accuracy.

  Further, a plurality of magnetic elements 14A and 14B are arranged vertically to form the magnetic detection means 14, and as described above, the magnetic element 14A detects a change in the waveform M of the magnetic flux density that decreases rapidly, and the stop lamp When the magnetic element 14B detects the change in the waveform N that is slightly more gradual and controls the auto cruise device, the stop lamp is first lit and then the brake pedal 20 is further operated. Only in such a case, it is possible to perform a reliable operation such as stopping the auto cruise device.

  As shown in the partial perspective view of FIG. 5, the magnetic detection means 14 is formed by arranging the plurality of magnetic elements 14A and 14B on the right and left sides as shown in the partial perspective view of FIG. When the magnet 12 provided with the substantially triangular prism-shaped inclined portion 12A is opposed to the side surface, by forming the upper surface of the magnet 12 on the inclined surface 12B instead of being flat, for example, the magnetic flux density detected by the magnetic element 14A is The magnetic flux density detected by the magnetic element 14 </ b> B can be changed slightly more gradually.

  In the above description, the configuration in which the inclined portion 12A having a substantially triangular prism shape is formed at the lower end of the substantially semi-cylindrical magnet 12 is described. The present invention can also be implemented with a configuration in which a substantially triangular prism-shaped inclined portion protruding in the direction of the means 14 is provided.

  In the above description, the magnetic detection means 14 is formed by arranging a plurality of magnetic elements 14A and 14B in the vertical and horizontal directions so that the stop lamp is extinguished and the auto cruise device is controlled. However, for example, when only turning off and turning off the stop lamp, the magnetic detection means 14 may be formed by only one magnetic element.

  Further, in the above description, the configuration in which the magnetic detection means 14 and the switching means 15 are integrally provided in the switch device 18 has been described. However, the configuration in which the switching means 15 is provided on the vehicle side, or the magnetic detection means 14 and the switching is provided. The present invention can also be implemented with a configuration in which a plurality of signals are further output from the means 15 to control devices other than the stop lamp and the auto cruise device.

  As described above, according to the present embodiment, the magnetic detection means disposed opposite to the lower end of the substantially columnar magnet 12 mounted on the inner bottom surface of the case 11 and having a magnetic field formed in the vertical direction with a predetermined gap on the side surface. By providing a substantially triangular prism-shaped inclined portion 12A that protrudes in the direction of 14, the substantially triangular prism-shaped inclined portion 12A at the lower end of the magnet 12 increases the area of the lower surface of the magnet 12, and the brake pedal 20 can be operated with a small amount of operation. Since the magnetic flux density of the magnet 12 detected by the magnetic detection means 14 changes greatly, a switch device that can perform highly accurate detection and can be reliably operated can be obtained.

  The switch device according to the present invention has an advantageous effect that a highly accurate detection and a reliable operation can be obtained, and it is mainly useful for controlling the turn-off of a stop lamp of an automobile.

DESCRIPTION OF SYMBOLS 11 Case 12 Magnet 12A Inclined part 12B Inclined surface 13 Wiring board 14 Magnetic detection means 14A, 14B Magnetic element 15 Switching means 16, 16A, 16B Terminal 17 Cover 17A Square cylinder part 18 Switch apparatus 20 Brake pedal 20A Arm 20B Rotating shaft 21 Magnetic material

Claims (1)

A substantially box-shaped case, a substantially columnar magnet mounted on the bottom surface of the case and having a magnetic field formed in the vertical direction, and a magnetic detection means disposed opposite to the magnet side surface with a predetermined gap, A switch device provided with a substantially triangular prism-shaped inclined portion projecting in the direction of the magnetic detection means at the lower end of the magnet.

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