JP5543802B2 - Solid state switch - Google Patents

Description

  The present invention relates to a contactless switch used as a stop lamp switch for a vehicle.

  Conventionally, a sliding contact type switch has been used exclusively for a vehicle stop lamp switch, etc., but this sliding contact type switch does not require position adjustment in individual parts, but has a mechanical sliding contact part. Therefore, there are problems such as poor conduction due to entry of dust, water, grease, etc. and generation of abnormal noise due to contact rubbing.

  Therefore, in recent years, a contactless switch using a magnet and a magnetic detection sensor such as a Hall element for detecting the magnetism has been proposed and is already in practical use.

  For example, in Patent Document 1, in order to detect ON / OFF with high accuracy without being affected by a temperature change, the magnet and the Hall element are separated at both ends of the moving range of the stroke member to which the magnet is attached, respectively. A configuration has been proposed in which the magnet is set so as to be closest to the Hall element during the movement distance.

JP 2006-092777 A

  By the way, the magnets and magnetic detection sensors that make up a solid state switch have individual variations in quality such as dimensions, and errors in the magnetic field strength distribution are likely to occur due to changes in magnetic force due to the influence of ambient temperature, etc. There was a problem that the accuracy became unstable.

  Therefore, the contactless switch proposed in Patent Document 1 employs a method of detecting the direction of the lines of magnetic force. However, the magnet used in this method has a narrow magnetic field strength range, so the detection accuracy is unstable. There is no solution to the problem. In addition, since there is no point at which the direction of the line of magnetic force is clearly switched, it is necessary to make the stroke of the stroke member large to a position where the change in the direction of the line of magnetic force can be reliably detected, and stable detection accuracy cannot be obtained. There was a problem that the switch was also enlarged.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a contactless switch capable of stabilizing the detection accuracy and reducing the size.

In order to achieve the above object, the invention according to claim 1
A magnetic detection sensor;
A terminal base provided with the magnetic detection sensor;
An operation member provided with a magnet to be detected by the magnetic detection sensor;
A holder coupled to the terminal base to hold the operating member slidably with respect to the magnetic detection sensor;
In a contactless switch comprising a switch body that accommodates the holder, the operation member held by the holder, and a part of the terminal base,
With arranging the magnets so as to form two magnetic fields at a predetermined distance around the axis center of the operating member, the two magnetic fields the magnet formed in the axis of the operating member the magnetic sensor overlaps It is arranged on the center line, and outputs a detection signal when the magnetic detection sensor detects a magnetic flux reversal position where the direction of the magnetic force line generated in the magnetic force line generated from the magnet is reversed according to the movement of the operation member. And

  The invention according to claim 2 is characterized in that, in the invention according to claim 1, the magnet is arranged around the axis center of the operation member, and the magnet and the magnetic detection sensor are arranged coaxially. To do.

The invention described in claim 3
A magnetic detection sensor;
A terminal base on which the magnetic detection sensor is disposed;
An operation member provided with a magnet to be detected by the magnetic detection sensor;
A holder coupled to the terminal base to hold the operating member slidably with respect to the magnetic detection sensor;
A switch body for accommodating the holder, the operation member held by the holder, and a part of the terminal base;
In the contactless switch with
Two magnets are arranged so as to form two magnetic fields at a predetermined distance around the axis center of the operation member, and the magnetic detection sensor is arranged on the axis center of the operation member, and the magnetic detection sensor Is characterized in that a detection signal is output when a magnetic flux reversal position at which the direction of the magnetic lines of force is reversed on the center line where the two magnetic fields formed by the magnet overlap is detected .

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the magnet is rod-shaped.

  According to the present invention, the magnetic flux reversal position where the direction of the magnetic field lines is reversed on the center line where the two magnetic fields overlap by arranging the magnets so as to form two magnetic fields at a predetermined distance around the axis center of the operating member. And a detection signal is output when the magnetic flux reversal position is detected by the magnetic detection sensor, so that the ON / OFF switching point of the signal can be reliably detected, and high detection accuracy can be stably achieved. Can be obtained.

  Further, if the magnetic field strength is increased, a sufficient distance from the vicinity of the magnet to the magnetic flux reversal position can be secured, so that the stroke of the operation member is increased, and the contactless switch can be reduced in size accordingly.

It is a sectional side view of the non-contact switch concerning the present invention. It is a disassembled perspective view of the non-contact switch which concerns on this invention. It is a disassembled perspective view of the non-contact switch which concerns on this invention. (A)-(e) is a sectional side view which shows the assembly point of the non-contact switch concerning this invention in the order of the process. (A)-(c) is a sectional side view explaining operation | movement of the non-contact switch which concerns on this invention. (A)-(c) is a figure which shows the positional relationship in the magnetic field of the magnet corresponding to the state shown to Fig.5 (a)-(c) and a magnetic field detection sensor.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a side sectional view of a contactless switch according to the present invention. FIGS. 2 and 3 are exploded perspective views of the contactless switch. A contactless switch 1 shown in FIG. driver depresses the brake pedal (not shown) as by outputting the ON signal as (braking state) and the output signal turns on the stop lamp (not shown), releases the foot from the brake pedal (non-restricted Dojo state) The stop lamp is turned off by outputting an OFF signal as an output signal. In the following description, the left side of FIG. 1 is the front, the right side is the rear, and the left-right direction is the axial direction.

  Thus, as shown in FIG. 1, the non-contact switch 1 is fitted and held in the switch body 2 so as to be slidable in the front-rear direction (left-right direction in FIG. 1). The operation member 4 and the terminal base 5 screwed to the inner periphery of the rear end (right end in FIG. 1) of the holder 3 are incorporated. The switch body 2, the holder 3, the operation member 4, and the terminal base 5 are each integrally formed of a non-conductive resin.

Hereinafter, each component of the non-contact switch 1 will be described.
(Switch body)
As shown in FIGS. 2 and 3, the switch body 2 includes a rectangular cylindrical body main body 2A having an open rear end, and a cylindrical body that extends horizontally integrally from the center of the end surface of the body main body 2A toward the front. The holder 3, the operating member 4, and the terminal base 5 are incorporated in the body main body 2 </ b> A. In addition, elongated rectangular engagement holes 2a are respectively formed at the upper and lower opposing positions of the body 2A of the switch body 2, and a male screw portion 2b extending in the axial direction is provided on the outer periphery of the vehicle body mounting portion 2B in the circumferential direction. A plurality are formed.
(holder)
The holder 3 includes a cylindrical main body 3A, and a square flange-shaped rotation blocking portion 3B is integrally formed at the rear end of the main body 3A. Accordingly, the holder 3 is inserted into the rectangular cylindrical body body 2A of the switch body 2 as shown in FIG. 1, and the rectangular flange-shaped rotation preventing portion 3B of the holder 3 is fitted into the body body 2A. As a result, the rotation of the holder 3 in the switch body 2 is prevented.

  Further, as shown in FIGS. 2 and 3, semi-cylindrical guide portions 3a extending in the axial direction are formed at four locations on the outer periphery of the main body portion 3A of the holder 3 (only three locations are shown in FIGS. 2 and 3). A rectangular locking claw 3b (only one of them is shown in FIGS. 2 and 3) forming a temporary fixing portion is formed above and below the main body 3A. It can be elastically deformed around the end. And the claw-like engagement protrusion 3c (FIG.2 and FIG.3) engaged with the said engagement hole 2a formed in the upper and lower sides of the body main body 2A of the switch body 2 on the upper and lower sides of the rotation latching | locking part 3B of the holder 3. As shown in FIG. (Only one of them is shown) is integrally projected.

Further, as shown in FIG. 1, a partition wall 3 </ b> C whose central portion bulges forward (on the operation member 4 side) is integrally formed at the axially intermediate portion inside the holder 3. As shown in FIG. 3, a female screw portion 3 d that forms a position adjusting portion together with a male screw portion 5 a formed on the outer periphery of the front end of the terminal base 5 is formed on the inner periphery of the rotation prevention portion 3 </ b> B of the holder 3. ing.
(Operation member)
The operation member 4 includes a bottomed cylindrical piston portion 4A and a round bar-shaped shaft 4B extending horizontally from the center of the end face of the piston portion 4A to the front, The shaft 3B is inserted and held in the through hole 2c of the vehicle body mounting portion 2B of the switch body 2 so as to be slidable in the axial direction. Guide ribs 4a are integrally formed along the axial direction at four locations on the outer periphery of the piston portion 4A, and these guide ribs 4a are slidable on the guide portion 3a formed on the outer periphery of the main body portion 3A of the holder 3. The operating member 4 is prevented from rotating by fitting. Here, as shown in FIG. 1, each guide portion 3 a of the holder 3 accommodates a spring 6 that is compressed between the partition wall 3 </ b> C of the holder 3 and the piston portion 4 </ b> A of the operation member 4. The member 4 is biased forward by the spring 6 (the direction in which the shaft 4B protrudes from the vehicle body mounting portion 2B of the switch body 2).

  As shown in FIGS. 2 and 3, a recess 4 b is formed on the upper and lower sides of the outer periphery of the piston portion 4 </ b> A of the operation member 4 for the locking claw 3 b formed on the holder 3 to enter.

Further, a small-diameter magnet fixing portion 4C is integrally formed at the rear end portion of the piston portion 4A of the operation member 4, and a ring-shaped protrusion 4c that functions as a stopper is formed on the front end surface of the piston portion 4A. Concentrically projecting around. As shown in FIG. 1 , an annular magnet 7 is fitted to the outer periphery of the magnet fixing portion 4 </ b> C, and the magnet 7 is a claw-like shape formed at a plurality of locations in the circumferential direction of the outer periphery of the magnet fixing portion 4 </ b> C. It is being fixed by 4d of latching parts.
(Terminal base)
The terminal base 5 is formed in a substantially cylindrical shape, and a rectangular flange-shaped rotation preventing portion 5A is integrally formed in the middle of the outer periphery in the axial direction. A male screw portion 5a is formed. As shown in FIG. 1, three terminals 8 are integrally formed in the base portion 5B of the terminal base 5 by insert molding, and a disc-shaped circuit board is formed at the ends of these terminals 8. 9 is held.

  Here, as shown in FIGS. 2 and 3, a circular hole 9 a is formed in the center portion of the circuit board 9, and a screw for inserting a spacer 10 into the circular hole 9 a of the circuit board 9 is formed in the circuit board 9. 11, and a magnetic detection sensor 12 such as a Hall element for detecting the magnetism of the magnet 7 is accommodated and held in the spacer 10. The magnetic detection sensor 12 is electrically connected to the circuit board 9 by a terminal 13.

  Thus, the circuit board 9, the spacer 10, the magnetic detection sensor 12, and the like are pre-assembled in the terminal base 5, and the male screw portion 5 a formed on the outer periphery of the terminal base 5 in which these are sub-assembled is a holder. As shown in FIG. 1, a part of the terminal base 5 is incorporated into the holder 3 by being screwed onto a female screw portion 3 d formed on the inner periphery of the rear end portion 3. The fitting portion between the holder 3 and the terminal base 5 is hermetically sealed by an O-ring 14 fitted on the outer periphery of the terminal base 5.

When a part of the terminal base 5 is incorporated into the holder 3 as described above, a sealed space S is formed between the terminal base 5 and the partition wall 3C of the holder 3 as shown in FIG. A circuit board 9, a spacer 10, and a magnetic detection sensor 12 are accommodated in S. The annular magnet 7 is arranged around the axis center of the operation member 4, and the magnet 7 and the magnetic detection sensor 12 are coaxially arranged on the axis center of the operation member 4.
(Assembly procedure of solid state switch)
Next, the assembly procedure of the contactless switch 1 configured as described above will be described with reference to FIGS. 4A to 4E are side sectional views showing the assembly procedure of the contactless switch in the order of the steps.

  When the contactless switch 1 is assembled, first, the operating member 4 (magnet 7) is moved to a predetermined position with respect to the holder 3 (a position where the ON / OFF signal of the magnetic detection sensor 12 is switched (the position shown in FIG. 5B). And temporarily fixed at a magnetic flux reversal position) described later.

  That is, as shown in FIG. 4A, the piston portion 4 </ b> A of the operation member 4 is fitted into the front opening of the holder 3, and the entire operation member 4 is pushed in the illustrated arrow direction against the urging force of the spring 6. Then, as shown in FIG. 4 (b), when the recesses 4 b formed on the top and bottom of the outer periphery of the piston portion 4 </ b> A of the operation member 4 match the locking claws 3 b of the holder 3, the upper and lower locking claws 3 b are moved. These are pressed in the direction of the arrow shown in the figure (inward in the radial direction) and elastically deformed with the base end as a center so that the distal end of the locking claw 3b protrudes into the recess 4b of the operating member 4. In this state, by releasing the pushing of the operating member 4, the operating member 4 is restored by the biasing force of the spring 6, so that the tip of the locking claw 3 b abuts on the end surface 4 b-1 of the recess 4 b, The member 4 is prevented from moving forward (to the left in FIG. 4B) and temporarily fixed at the illustrated position, and the holder 3 and the operation member 4 are sub-assembled. At this time, the tip of the locking claw 3b engages with the end surface 4b-1 of the recess 4b of the operating member 4, and the end surface 4b-1 of the recess 4b is brought into contact with the end surface of the locking claw 3b by the biasing force of the spring 6. Since the contact is made by force, the locking claw 3b is kept elastically deformed inward of the holder 3 as shown in FIG. 4 (b).

When the operation member 4 is temporarily fixed to the holder 3 at a predetermined position (position where the ON / OFF signal of the magnetic detection sensor 12 is switched (magnetic flux reversal position described later)) with respect to the holder 3 as described above, FIG. As shown in FIG. 2, a female screw portion 3d formed on the inner periphery of the end of the holder 3 is screwed into a male screw portion 5a of the terminal base 5 in which the circuit board 9, the magnetic detection sensor 12 and the like are pre-assembled, When the assembled holder 3 is rotated with respect to the terminal base 5, the relative position in the axial direction of the two changes, and the magnet 7 disposed on the operation member 4 temporarily fixed to the holder 3 and the terminal base 5 are disposed. The relative position of the magnetic detection sensor 12 can be finely adjusted. That is, the female screw portion 3d formed on the holder 3 and the male screw portion 5a formed on the terminal base 5 are screwed together to constitute a position adjusting portion, and the magnet 7 and the magnetic detection are formed by this position adjusting portion. The relative position of the sensor 12 can be finely adjusted to absorb an error in a magnetic flux reversal position , which will be described later, caused by variations in magnetic field strength.

Specifically, the magnetic detection sensor 12 is connected to a lamp (not shown), and the holder 3 is rotated together with the operation member 4 while confirming lighting / extinction of the lamp (output of an ON / OFF signal of the magnetic detection sensor 12). Then, the relative position between the magnet 7 and the magnetic detection sensor 12 is finely adjusted, and the rotation of the holder 3 and the operation member 4 is performed when the distance L between the two shown in FIG. 4C becomes the distance at which the ON / OFF signal is switched. Stop.

  As described above, the holder 3 to which the operation member 4 is temporarily fixed by the sub-assembly and the terminal base 5 in which the circuit board 9, the magnetic detection sensor 12 and the like are sub-assembled in advance are combined, and the magnet 7 disposed in each of them. When the relative positions of the magnetic detection sensor 12 and the magnetic detection sensor 12 are finely adjusted, they are inserted into the switch body 2 as a single unit as shown in FIG. When the protrusion 3 c is engaged with the engagement hole 2 a formed at the top and bottom of the switch body 2, the unit is positioned and incorporated into the switch body 2. Then, the rectangular flange-shaped rotation blocking portions 3B and 5A (see FIGS. 2 and 3) formed on the holder 3 and the terminal base 5, respectively, fit into the rectangular cylindrical body body 2A of the switch body 2, The holder 3, the operation member 4 temporarily fixed thereto, and the terminal base 5 are prevented from rotating in the switch body 2, and the relative position between the magnet 7 and the magnetic detection sensor 12 is fixed.

  Finally, when the operating member 4 is pushed backward against the biasing force of the spring 6 as shown in FIG. 4 (e), the end face 4b-1 of the recess 4b formed in the piston portion 4A of the operating member 4 becomes. The engaging claw 3b is separated from the engaging claw 3b of the holder 3 and the engaging claw 3b is elastically spread outward in the radial direction (in the direction of the arrow in the figure) and restored to its original state. 3 is also temporarily released. Then, sliding of the operating member 4 is allowed, and when the operating member 4 is released, the operating member 4 slides forward (in the direction of the arrow in the figure) by the urging force of the spring 6 and moves to the end surface of the piston portion 4A. The operation member 4 is stationary with the formed protrusion 4c in contact with the inner end face of the body body 2A of the switch body 2, and at this time, the shaft 4B of the operation member 4 protrudes from the switch body 2 by a predetermined amount. .

The non-contact switch 1 is assembled according to the procedure described above, and the non-contact switch 1 is used as a stop lamp switch for a vehicle.
(Solid state switch operation)
Next, the operation and detection principle of the contactless switch 1 used as a vehicle stop lamp switch will be described with reference to FIGS. 5 (a) to 5 (c) and FIGS. 6 (a) to 6 (c). 5A to 5C are side sectional views for explaining the operation of the contactless switch, and FIGS. 6A to 6C are magnets corresponding to the states shown in FIGS. 5A to 5C. It is a figure which shows the positional relationship in the magnetic field of a magnetic field detection sensor.

  The contactless switch 1 is passed through an inverted L-shaped bracket 15 in which a vehicle body mounting portion 2B of the switch body 2 is mounted on the vehicle body, and is screwed into a male screw portion 2b (see FIGS. 2 and 3) of the vehicle body mounting portion 2B. The nut 16 is attached to the vehicle body 17 via the bracket 15 by being tightened, and is disposed behind the brake lever 18.

And Thus, in a state where the driver does not depress the lower brake pedal (not shown) of the brake lever 18 (non-braking state), the blanking Les Kireba 18 5 proximity switch 1 as shown in (a) a shaft 4B The shaft 4B is pushed into the holder 3 in contact therewith. In this state, the magnet 7 disposed on the operation member 4 is in a position closest to the magnetic detection sensor 12, and the magnetic detection sensor 12 is in a magnetic field range in which the magnetic field strength of the magnet 7 is stable. It is turned on by detecting a plurality of magnetic lines of force released to the surface. In this embodiment, since the magnetic detection sensor 12 is configured to output an OFF signal in the ON state, a stop lamp (not shown) is turned off.

  By the way, the magnetic detection sensor 12 determines the strength of the magnetic field and the magnetic pole based on the number and direction of the magnetic lines of force, but the intensity of the magnetic field formed by the annular magnet 7 used in the present embodiment and the direction of the magnetic lines of force. Is shown in FIG. Two magnetic fields are formed around the axial center of the operating member 4 by the annular magnet 7, and the strength of the magnetic field is strong in the region A close to the magnet 7, and in the far region C, the two magnetic fields cancel each other and are weak. In the middle region B, an intermediate value is shown. In addition, the direction of the lines of magnetic force is indicated by arrows. In this embodiment, the lower side of the magnet 7 in FIG. 6 is an N pole and the upper side is an S pole. For this reason, since the magnetic lines of force exit from the N pole and go to the S pole, on the center line where the two magnetic fields in the region A close to the magnet 7 overlap, as shown in FIG. Since the magnetic field lines are concentrated, a stable magnetic field range is formed. On the other hand, in the region C far from the magnet 7, the magnetic field lines are dispersed even on the center line where the two magnetic fields of the magnet 7 overlap, and the magnetic field lines become unstable magnetic field ranges in which the direction of the magnetic field lines does not become a constant direction. An inversion position exists as indicated by a broken line a.

As shown in FIG. 5A, in a state where the driver does not depress a brake pedal (not shown) at the lower end of the brake lever 18 (non-braking state), the shaft 4B is held in the pushed-in operating position, and FIG. ), The magnet 7 is in the position closest to the magnetic detection sensor 12, and at this time, as described above, the magnetic detection sensor 12 has a plurality of magnetic field strengths of the magnet 7 that are stable (from the N pole to the S pole). since the lines of magnetic force is in the magnetic field ranges state) are present in a concentrated magnetic field lines emitted upward can be reliably detected in FIG. 6, oN state is maintained. In the present embodiment, since the magnetic detection sensor 12 is configured to output an OFF signal in the ON state, the unlit stop lamp (not shown) is reliably maintained.

  When the vehicle is braked, the driver depresses the brake pedal with his / her foot, and when the brake lever 18 rotates about a rotation fulcrum (not shown) above the shaft, the contactless switch 1 is urged forward by the spring 6. 4B follows the movement of the brake lever 18 while abutting on the brake lever 18 and gradually protrudes from the switch body 2, and accordingly, the operation member 4 and the magnet 7 disposed thereon slide forward. . In this process, when the magnet 7 reaches the position shown in FIGS. 5B and 6B with respect to the magnetic detection sensor 12 (position separated by the distance L shown in FIG. 4C), the magnetic detection is performed. The sensor 12 is located at the magnetic flux reversal position (line a indicated by a broken line) in the magnetic field of the magnet 7 as shown in FIG. In this state, since the direction of the magnetic force line is reversed by 180 °, the magnetic detection sensor 12 cannot detect the magnetic force line emitted upward from the magnet 7 in FIG. 6, and the magnetic detection sensor 12 is turned off from the ON state. It becomes. In this embodiment, since the magnetic detection sensor 12 is configured to output an ON signal in the OFF state, the output signal is switched from the OFF signal to the ON signal, and a stop lamp (not shown) is lit.

  When the driver further depresses the brake pedal from the state shown in FIG. 5B, the brake lever 18 is separated from the shaft 4B of the contactless switch 1 as shown in FIG. The protrusion 4c formed at the end of the piston portion 4A comes into contact with the inner end surface of the switch body 2 to stop at the illustrated non-operating position (braking state), and the shaft 4B is maintained protruding from the switch body 2. The In this state, the magnetic detection sensor 12 is located in the region C where the direction of the magnetic field lines is reversed beyond the magnetic flux reversal position (broken line a) as shown in FIG. In FIG. 6, there is no line of magnetic force emitted upward from the magnet 7, and the magnetic detection sensor 12 is reliably maintained in the OFF state. Since the ON signal continues to be output as the output signal, the stop lamp is kept lit. That is, if the brake pedal is further depressed with the state shown in FIGS. 5B and 6B as a boundary, the stop lamp continues to light, and the brake pedal is released by releasing the brake pedal from the depressed state (braking state). After the lever 18 passes the position shown in FIGS. 5B and 6B in the process of returning to the original operating state (non-braking state) shown in FIG. 5A, the magnetic detection sensor 12 is turned on. When the output signal is switched from the ON signal to the OFF signal, the stop lamp is turned off.

As described above, in the contactless switch 1 according to the present invention, by using the annular magnet 7, two magnetic fields are formed around the axis center of the operation member 4 with a predetermined distance therebetween , and these two magnetic fields overlap. On the center line, a magnetic flux reversal position (broken line a shown in FIG. 6) where the direction of the lines of magnetic force is reversed by 180 ° is generated. And when the magnetic detection sensor 12 detects the magnetic flux reversal position (when it is no longer possible to detect magnetic lines of force released in a predetermined direction (in this embodiment, magnetic lines of force released upward in FIG. 6)) ) Is changed from the ON state to the OFF state, and the output signal is switched from the OFF signal to the ON signal. Thereby, the magnetic detection sensor 12 can reliably detect the ON / OFF switching point of the output signal, and high detection accuracy can be stably obtained. That is, in the running state, the magnetic detection sensor 12 is placed in a stable magnetic field range in which a plurality of magnetic field lines emitted upward in FIG. It shows a reaction, the ON state is maintained, and the brake lamp does not turn on accidentally.

  In addition, after the brake pedal is depressed and the magnetic flux reversal position is detected, the direction of the magnetic force line is reversed by 180 °, so that there is no magnetic force line released upward in FIG. Since the detection sensor 12 is not turned on, the brake lamp can be reliably turned on. Therefore, the stop lamp can be switched on and off by depressing the brake pedal accurately without malfunction.

  In addition, according to the contactless switch 1 according to the present embodiment, the magnetic flux reversal position moves according to the magnetic field strength. Therefore, if the magnetic field strength is increased, the magnetic flux reversal position starts from the vicinity of the magnet 7. Even when the magnet itself is thin, the stroke of the operation member 4 can be increased by using a magnet having a strong magnetic field strength, and the magnet is made thin. It is also possible to easily achieve downsizing of the contactless switch 1 by that amount.

  In the above embodiment, the annular magnet 7 is used. However, two rod-shaped magnets are arranged around the center of the axis of the operation member 4 at a predetermined interval, and the magnetic detection sensor 12 is disposed on the operation member 4. The same effect as described above can also be obtained by arranging on the axis center.

  In the above description, the contactless switch according to the present invention is used as a stop lamp switch for a vehicle. However, the contactless switch according to the present invention can be used for any other application.

Furthermore, in the above embodiment, when the magnetic detection sensor 12 is in the ON state for detecting the magnetic force lines of the magnet 7, the OFF signal is output and the stop lamp is turned off, and the magnetic detection sensor 12 does not detect the magnetic force lines of the magnet 7. In the OFF state, an ON signal is output and the stop lamp is lit. Conversely, when the magnetic detection sensor 12 is in the ON state where the magnetic force lines of the magnet 7 are detected, an ON signal is output and the stop lamp is lit. However, when the magnetic detection sensor 12 is in an OFF state where the magnetic force lines of the magnet 7 are not detected, an OFF signal may be output to turn off the stop lamp.

  By the way, the non-contact switch has a female screw portion that is provided with an engagement portion together with a male screw portion of the vehicle body mounting portion on an inverted L-shaped bracket in which the vehicle body mounting portion of the switch body is attached to the vehicle body, and is screwed into the male screw portion. It may be attached to the vehicle body via a bracket by a bush formed with an elastic claw portion that engages with the engaging portion.

DESCRIPTION OF SYMBOLS 1 Contactless switch 2 Switch body 2A Body body of switch body 2B Car body mounting part of switch body 2a Engagement hole of switch body 2b Male thread part of switch body 2c Through-hole of switch body 3 Holder 3A Holder body 3B Anti-rotation part 3C Partition of holder 3a Guide part of holder 3b Locking claw (temporary fixing part) of holder
3c Engagement protrusion of holder 3d Female thread portion of holder 4 Operation member 4A Piston portion of operation member 4B Shaft of operation member 4C Magnet fixing portion of operation member 4a Guide rib of operation member 4b Recess of operation member 4b-1 End surface of recess 4c Projection of operation member 4d Locking portion of operation member 5 Terminal base 5A Terminal base rotation blocking portion 5B Terminal base base portion 5a Terminal base male screw portion 6 Spring 7 Magnet 8 Terminal 9 Circuit board 9a Circuit board circular hole 10 Spacer 11 Screw 12 Magnetic detection sensor 13 Terminal 14 O-ring 15 Bracket 16 Nut 17 Car body 18 Brake lever A to C Magnetic field region a Line indicating magnetic flux reversal position S Sealed space

Claims (4)

A magnetic detection sensor;
A terminal base provided with the magnetic detection sensor;
An operation member provided with a magnet to be detected by the magnetic detection sensor;
A holder coupled to the terminal base to hold the operating member slidably with respect to the magnetic detection sensor;
In a contactless switch comprising a switch body that accommodates the holder, the operation member held by the holder, and a part of the terminal base,
With arranging the magnets so as to form two magnetic fields at a predetermined distance around the axis center of the operating member, the two magnetic fields the magnet formed in the axis of the operating member the magnetic sensor overlaps It is arranged on the center line, and outputs a detection signal when the magnetic detection sensor detects a magnetic flux reversal position where the direction of the magnetic force line generated in the magnetic force line generated from the magnet is reversed according to the movement of the operation member. A contactless switch.   The contactless switch according to claim 1, wherein the magnet is arranged around the axis of the operation member in an annular shape, and the magnet and the magnetic detection sensor are arranged coaxially. A magnetic detection sensor;
A terminal base on which the magnetic detection sensor is disposed;
An operation member provided with a magnet to be detected by the magnetic detection sensor;
A holder coupled to the terminal base to hold the operating member slidably with respect to the magnetic detection sensor;
A switch body for accommodating the holder, the operation member held by the holder, and a part of the terminal base;
In the contactless switch with
Two magnets are arranged so as to form two magnetic fields at a predetermined distance around the axis center of the operation member, and the magnetic detection sensor is arranged on the axis center of the operation member, and the magnetic detection sensor It is on the center line of the two magnetic fields the magnet forms overlap, proximity switch you and outputs a detection signal when the direction of the magnetic field lines detects a magnetic flux reversal position for reversing. The contactless switch according to claim 3, wherein the magnet has a bar shape.

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