JP5877115B2 - Electric lock switch mechanism - Google Patents

Description

  The present invention relates to an electric lock switch mechanism in which a dead bolt is moved forward and backward by a drive motor.

  As an electric lock in which a dead bolt is moved forward and backward between a locked position and an unlocked position by a drive motor, one described in Patent Document 1 is conventionally known. In this electric lock, the rotation of the drive motor, the drive of which is controlled by a control unit provided on the printed circuit board, is reduced by a gear reduction mechanism, and the dharma is adjusted to the set angle in synchronization with the rotation of the output gear of the gear reduction mechanism. The dead bolt is moved back and forth between a locked position and an unlocked position via a crank arm that rotates in the opposite direction and connects the dharma and the dead bolt.

  By the way, in the electric lock described above, an interlocking pin provided at one end of the drive arm is slidably fitted in an arc-shaped elongated hole formed in the output gear, and the other end of the drive arm is made dharma. It is connected to the formed arm connecting piece, and the dharma is rotated by a set angle by the rotation of the output gear.

  Here, when the output gear is stopped in a state where the dharma is rotated by driving the drive motor and the dead bolt is moved to the locking position or the unlocking position, the interlocking pin is the end face on the trailing side in the rotation direction of the long hole. Since there is play between the front end face in the rotation direction of the long hole and the interlocking pin, if the dead bolt is moved in the reverse direction by the reverse rotation of the drive motor, the output gear will idle. Thus, the rotation cannot be transmitted to Dharma, and the deadbolt cannot be moved immediately.

  For this reason, when the dead bolt is moved to the locked position or the unlocked position, it is necessary to reverse the drive motor to return the output gear to the origin position (neutral position).

  Therefore, in the conventional electric lock, two position detection proximity switches for detecting the locking position and the unlocking position of the dead bolt are provided in the lock box, and when the dead bolt moves to the locking position, One proximity switch is actuated by the provided magnet, and the drive motor is reversed by a detection signal output from the proximity switch to return the output gear to the neutral position.

  When the dead bolt moves to the unlocked position, the other proximity switch is operated by the magnet, and the drive motor is reversed by the detection signal output from the proximity switch to return the output gear to the neutral position. ing.

Japanese Patent No. 455389

  By the way, in the switch mechanism of the conventional electric lock, a printed circuit board is accommodated in a circuit board case built on the upper side of the dead bolt, and a lock position detection and an unlock position detection 2 are provided on the lower edge of the print circuit board. Two proximity switches are provided, and on the other hand, an operating cam is pivotally attached to the dead bolt, a magnet is fixed to a slide piece provided on the operating cam, and the dead bolt is completely moved to the locked position to reach a locking operation. In the process, the proximity cam is operated by displacing the operation cam so that the magnet is close to the proximity position detection proximity switch, and when the dead bolt is retracted to the unlock position, the magnet is detected for the unlock position. Since the switch is configured to be operated in opposition to the proximity switch, there are the following problems.

  That is, since the dead bolt that supports the magnet is a slidable support, it has a backlash, and the printed circuit board that supports the proximity switch has an attachment error with respect to the circuit board case, while the circuit board case is a lock box. Since there is a mounting error, it is not possible to secure a highly accurate positional relationship between the proximity switch and the magnet, and the gap formed between the opposing portions of the magnet and the proximity switch becomes too large. The proximity switch may not work.

  Further, since it is necessary to dispose a proximity switch close to the dead bolt, it is necessary to provide a switch support piece portion disposed between the drive motor and the dead bolt on the printed circuit board. The shape of the substrate case to be accommodated becomes complicated, and it takes time to manufacture.

  Furthermore, in order to make the magnet face the proximity switch for detecting the unlocking position in the process of placing and locking the deadbolt at the locking position, an operating cam and a crank arm that swings the operating cam are required, and the number of parts is large. Therefore, there is a problem that the cost is high and the assembly is troublesome.

  An object of the present invention is to provide a switch mechanism for an electric lock having a simple configuration with a small number of parts that can reliably operate a proximity switch.

  In order to solve the above problems, in the present invention, a lock box, a drive motor whose drive is controlled by a control unit of a printed circuit board incorporated in the lock box, and a gear for reducing the rotation of the drive motor A speed reduction mechanism, a dead bolt that is moved forward and backward with the rotation of the output gear of the gear speed reduction mechanism as a drive source, and two position detection proximity switches that detect a locked position and an unlocked position of the dead bolt, In the electric lock switch mechanism in which the drive motor is reversely rotated by the output signal from the proximity switch to return the output gear to the neutral position, in the lock box, in conjunction with the forward and reverse rotation of the output gear. The rack plate is moved up and down, and the rack plate is rotated up and down by a set angle to move the dead bolt forward and backward between the locked position and the unlocked position. A dead hub, a switch lever whose one end is connected to the rack plate and swings a set angle in conjunction with the raising and lowering of the rack plate, and a board case for housing the printed board are incorporated, and a side plate of the board case is incorporated. A fulcrum pin is provided to swingably support the central portion of the switch lever, and a magnet for operating the proximity switch is provided at the other end of the switch lever. The two proximity switches are provided facing each of the stop positions of the magnets that swing with the lever, the detection signal output from the one proximity switch is used as a lock signal, and the detection signal output from the other proximity switch is As the unlock signal, the drive motor is rotated in the opposite direction to the previous rotation direction by the output of the signal. Than is adopted the configuration.

  In the switch mechanism of the electric lock having the above configuration, when the drive motor is rotated in one direction, the rotation is decelerated by the gear reduction mechanism, the output gear is decelerated in one direction, and the rack plate is raised by the rotation. . The dead hub rotates in one direction (locking direction) in conjunction with the upward movement of the rack plate, and the dead bolt moves toward the locking position.

  When the drive motor is rotated in the reverse direction, the output gear rotates in the reverse direction, and the rack plate is lowered by the rotation. In conjunction with the downward movement of the rack plate, the dead hub rotates in the other direction (unlocking direction), and the dead bolt moves toward the unlocking position.

  At this time, since one end of the switch lever is connected to the rack plate, the switch lever swings in conjunction with the up and down movement of the rack plate. Here, when the deadbolt moves to the locking position, the magnet provided at the other end of the switch lever faces the proximity switch for detecting the locking position, and a detection signal is output from the proximity switch. When the dead bolt moves to the unlocking position, the magnet faces the unlocking position detection proximity switch, and a detection signal is output from the proximity switch.

  An output signal from the proximity switch is output to the control unit. The control unit rotates the drive motor in the direction opposite to the previous rotation direction by the detection signal input from the proximity switch, and the output gear is returned to the neutral position by the reverse rotation of the drive motor.

  In the present invention, a switch lever that swings in conjunction with the up-and-down movement of the rack plate is supported by the side plate of the substrate case so as to be swingable, and two proximity members that are operated by a magnet provided at the end of the switch lever. Since each of the switches is supported by the component mounting surface of the printed circuit board, a highly accurate positional relationship can be secured between the proximity switch and the magnet, and the proximity switch can be reliably operated by the magnet. it can.

  In the switch mechanism of the electric lock according to the present invention, as an interlocking mechanism for moving the rack plate up and down by forward and reverse rotation of the output gear, an arc-shaped long hole is provided on one side of the output gear, and one end of the crank arm is provided in the long hole. It is possible to adopt a configuration in which a pin provided in the portion is slidably fitted and the other end portion of the crank arm is rotatably connected to the rack plate.

  In the present invention, as described above, the switch lever that swings in conjunction with the lifting and lowering movement of the rack plate is supported by the side plate of the board case so as to be swingable, and is operated by the magnet provided at the end of the switch lever. Since each of the two proximity switches to be supported is supported by the component mounting surface of the printed circuit board housed in the board case, a highly accurate positional relationship can be secured between the proximity switch and the magnet. Thus, the proximity switch can be operated reliably.

  In addition, since the proximity switch does not need to be disposed close to the dead bolt, the printed circuit board and the substrate case that accommodates the printed circuit board can be made into a simple and small-sized device, facilitating manufacture and cost. Can be reduced.

  In addition, the rack plate is moved up and down by the rotation of the output gear of the gear reduction mechanism, and the switch lever is swung in conjunction with the up and down movement of the rack plate to reduce the number of parts for operating the proximity switch. Therefore, an electric lock that is easy to assemble and inexpensive can be provided.

  In addition, since the proximity switch is operated by swinging the switch lever, the lever ratio between the lever length from the lever swing center to the rack plate connection position and the lever length from the magnet support position is changed. It is possible to cope with an electric lock having a small rotation angle.

The longitudinal cross-sectional view which shows embodiment of the switch mechanism of the electric lock which concerns on this invention 2 is a longitudinal sectional view showing a locked state of the electric lock. Sectional view along line III-III in FIG. 1 is a partially cutaway front view of the substrate case shown in FIG. Sectional view along line VV in FIG. An exploded perspective view of a dead bolt and a guide panel for guiding the movement of the dead bolt Exploded perspective view showing output gear and rack plate (a) thru | or (c) is operation | movement explanatory drawing which shows rotation operation | movement of an output gear in steps.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, the lock box 1 has a flat square shape, and a front plate 3 is provided on the front side of the back plate 2 and a screw 3a. It is attached to the back plate 2 by tightening.

  Inside the lock box 1 are a dead bolt 5 that can be projected and retracted with respect to a square bolt insertion hole 4 formed in the front plate 3 and the back plate 2, and a pair of opposed inner sides that slidably support the dead bolt 5. A guide board 6A and a pair of opposed outer guide boards B provided outside the inner guide board 6A are incorporated.

  As shown in FIGS. 2 and 6, the dead bolt 5 is formed in a downward U-shape and has a top plate 5a and a pair of opposed side plates 5b. An L-shaped bent piece 5c that is bent toward the side plate 5b and bent downward from the tip thereof is provided, and a notch 5d is formed on the lower side of the bent piece 5c.

  A pair of opposed side plates 5b of the dead bolt 5 support a pair of guide pins 7 and 8 spaced in the front-rear direction, and both ends of the front guide pin 7 and the rear guide pin 8 are opposed to a pair of inner guides. A pair of front and rear guide holes 9 formed in each of the board 6A and the outer guide board 6B are slidably fitted.

  The pair of front and rear guide holes 9 are elongated holes extending long in the front-rear direction, and the dead bolt 5 is movable along the guide holes 9. The dead bolt 5 is movable within a range in which both end portions of the guide pins 7, 8 are in contact with both front and rear ends of the guide hole 9, and both end portions of the guide pins 7, 8 are at the front end of the guide hole 9. 2, the tip of the dead bolt 5 projects from the bolt insertion hole 4 as shown in FIG. 2. The protruding position is the locking position.

  Further, as shown in FIG. 1, the leading end of the dead bolt 5 is immersed in the bolt insertion hole 4 in a state where both end portions of the guide pins 7 and 8 are in contact with the rear end of the guide hole 9, and the insertion position Is the unlocking position.

  As shown in FIGS. 2 and 6, a sickle 10 is incorporated in the tip of the dead bolt 5. The sickle 10 is swingable about the front guide pin 7, and an engagement piece 11 is provided downward at the tip. Further, a brake piece 12 is provided at the rear end portion of the sickle 10 downward, and the brake piece 12 contacts the lower part of the inner periphery of the bolt insertion hole 4 before the dead bolt 5 moves forward to reach the locking position. It comes into contact with it and stops. When the deadbolt 5 further advances from the stopped state, the sickle 10 swings downward about the front guide pin 7, and the engagement piece 11 protrudes below the tip of the deadbolt 5. .

  In addition, the engagement piece 11 comes into contact with the inner peripheral lower side of the bolt insertion hole 4 at a position before the dead bolt 5 moves backward and reaches the unlocked position. When the dead bolt 5 retreats from the contact state, the sickle 10 swings upward about the front guide pin 7 due to contact with the inner peripheral lower side of the bolt insertion hole 4, and the dead bolt 5 retracts to the retracted position. Thus, it is accommodated in the tip of the dead bolt 5.

  As shown in FIG. 2, a lock lever 13 is provided above the dead bolt 5. The lock lever 13 is swingably supported around a fulcrum pin 14 supported at both ends by a pair of opposed outer guide boards 6B, and the tip of the lock lever 13 is dead bolt 5 by a kick spring 15 supported by the fulcrum pin 14. It is urged | biased toward the direction which presses.

  When the dead bolt 5 moves forward to the locking position, the lock lever 13 engages with the rear edge of the top plate 5a of the dead bolt 5 to lock the dead bolt 5 in the locking position.

  A projecting piece 16 is provided on the end of the rocking lever 13 on the swing center side, and the projecting piece 16 allows the rear guide pin 8 to be moved while the lock lever 13 locks the dead bolt 5 in the locked position. The release lever 17 is pivotally supported at the center so as to be opposed to the rocking end portion of the release lever 17 in the front-rear direction, and is pressed by swinging the release lever 17 in one direction. Due to the pressing, the lock lever 13 swings upward and the dead bolt 5 is unlocked.

  A pressure receiving piece 18 extending obliquely downward is provided at an end of the release lever 17 on the swing center side.

  A substrate case 20 is incorporated in the lock box 1 above the dead bolt 5. In addition, a motor support frame 30 is incorporated in a space formed between the substrate case 20 and the lock lever 13, and the drive motor 31 is supported by the motor support frame 30.

  The substrate case 20 is fixed to the lock box 1. As shown in FIGS. 4 and 5, a printed circuit board 21 is accommodated in the substrate case 20. The printed circuit board 21 is fixed to the substrate case 20 through a screwing means, and a control unit 22 that controls the drive motor 31 is provided on the printed circuit board 21.

  As shown in FIG. 1, the drive motor 31 has a rotation shaft 32 that is supported horizontally so that the rotation shaft 32 faces the rear plate of the lock box 1, and a gear reduction mechanism 33 that decelerates and outputs the rotation of the rotation shaft 32. 31 and the rear plate 1a of the lock box 1.

  The gear reduction mechanism 33 has a pair of bevel gears 34 and 35 that mesh with each other in its torque transmission system, and an output gear 36 that outputs reduced rotation is centered on a horizontal axis that is orthogonal to the central axis of the drive motor 31. It is designed to rotate.

  Inside the lock box 1, a rack plate 40 is incorporated at a position close to the rear plate 1a. The rack plate 40 is supported so as to be movable up and down along a vertical guide groove 41 formed between the rear end portions of the pair of opposed inner guide boards 6A. A support piece 42 is provided, and one end of a crank arm 44 is rotatably connected to a connection pin 43 provided on the support piece 42.

  As shown in FIGS. 1 and 7, the crank arm 44 has an interlocking pin 45 at the other end, and the interlocking pin 45 is in an arc-shaped long hole 37 formed on one side surface of the output gear 36. The rack plate 40 is slidably fitted, and the rack plate 40 is moved up and down by a predetermined stroke via the crank arm 44 by rotation of the output gear 36 at a set angle.

  As shown in FIG. 1, a bifurcated piece 46 is provided on the upper side of the rack plate 40, and an interlocking pin 51 provided at one end of the switch lever 50 is fitted between the bifurcated piece 46. The switch lever 50 is supported at the center in the length direction by a fulcrum pin 52 protruding from the side plate of the substrate case 20, and is swingable about the fulcrum pin 52.

  The other end of the switch lever 50 is provided with a cylindrical magnet holder 54 that can swing along an arcuate guide groove 53 formed in the side plate of the substrate case 20, and the first magnet 55 is provided by the magnet holder 54. Is supported.

The switch lever 50 swings at a set angle about the fulcrum pin 52 in conjunction with the vertical movement of the rack plate 40. As shown in FIG. 4, on the component mounting surface of the printed circuit board 21, a first position for detecting the locking position of the dead bolt 5 at a position facing each stop position of the first magnet 55 that swings together with the switch lever 50. a proximity switch S _1, and a second proximity switch S ₂ for detecting the unlocking position of the dead bolt 5 is provided.

Further, the printed circuit board 21, the third proximity switch S ₃ is provided on an outer peripheral portion opposite to the position of the output gear 36, whereas, in the outer peripheral portion of the output gear 36, as shown in FIG. 1, a second A magnet 56 is provided.

The first proximity switch S ₁ and the second proximity switch S ₂ is adapted to output a detection signal to the control unit 22 operates when facing the first magnet 55, the control unit first proximity switch the detection signal input from the S ₁ and the second proximity switch S _2, which is a drive motor 31 to rotate in a direction opposite to the rotation direction of the immediately preceding. Output gear 36 by the reverse rotation of the drive motor 31 is rotated toward the neutral direction, the output gear 36 to the neutral position is rotated, the second magnet 56, so as to face the third proximity switch S ₃ Yes. In the opposing position, a third proximity switch S ₃ outputs a stop signal to the control unit 22 operates, the control unit 22 stops the driving motor 31 to reverse rotation by a stop signal inputted from the third proximity switch S ₃ It is supposed to let you.

  The neutral position is a position where one end or the other end of the long hole 37 faces the interlocking pin 45 of the crank arm 44 in the circumferential direction, and the rotation of the output gear 36 is immediately transmitted to the interlocking pin 45 of the crank arm 44. Say.

  As shown in FIGS. 1 and 7, a bent piece 47 is provided at one side lower portion of the rack plate 40, and rack teeth 48 are provided on the side edges of the bent piece 47.

  As shown in FIGS. 1 and 2, a dead hub 60 is incorporated in the rear part of the inner lower part of the lock box 1. The dead hub 60 has a boss portion 61, and the boss portion 61 is rotatably supported by a pedestal 62 fixed in the lock box 1.

  The dead hub 60 is rotated by a manual rotation operation of a thumb turn (not shown). Pinion teeth 63 that mesh with the rack teeth 48 of the rack plate 40 are formed on the outer periphery of the dead hub 60. When the rack plate 40 moves up and down, the dead hub 60 rotates in the direction opposite to the set angle in conjunction with the up and down movement. It is like that.

  A pressing piece 64 is provided on the outer periphery of the dead hub 60. The pressing piece 64 has a tip portion disposed in the aforementioned notch portion 5d formed in the bent piece 5c of the dead bolt 5. When the dead hub 60 rotates in one direction in conjunction with the downward movement of the rack plate 40, the pressing piece 64 presses the front side wall of the notch 5d to move the dead bolt 5 toward the locking position. ing.

  The pressing piece 64 faces the pressure receiving piece 18 of the release lever 17, and when the dead hub 60 rotates in the other direction in conjunction with the upward movement of the rack plate 40, the pressure piece 64 presses the pressure receiving piece 18 to release the release lever 17. Is swung toward the disengagement position, and the dead bolt 5 is moved toward the unlocking position via the release lever 17.

  A first stopper piece 65 a and a second stopper piece 65 b are provided in the circumferential lower portion of the dead hub 60 at intervals in the circumferential direction, and these stopper pieces 65 a and 65 b are connected to the stopper member 66 provided on the pedestal 62. The dead hub 60 is stopped at the locked position or the unlocked position by the contact.

  As shown in FIG. 2, the first stopper piece 65a is connected to a biasing means 67 that biases the dead hub 60 by switching between the locked position and the unlocked position. The biasing means 67 connects one end portion of the spring support member 68 to the first stopper piece 65a, and the other end portion of the spring support member 68 is supported in the radial direction of the rotatable shaft body 69 supported by the inner guide panel 6A. The first stopper piece 65 a and the shaft body 69 are pressed in opposite directions by a spring 71 supported by the spring support member 68 so as to be slidably inserted into the hole 70.

  The electric lock shown in the embodiment has the above-described structure, and FIG. 1 shows the unlocked state of the electric lock, and the dead bolt 5 is disposed at the unlocking position where it is inserted into the bolt insertion hole 4. In the unlocked state, when the drive motor 31 is driven and the output gear 36 is rotated in the locking direction indicated by the arrow in FIGS. 1 and 8A, one end of the long hole 37 formed in the output gear 36 is cranked. Abutting on an interlocking pin 45 provided at the other end of the arm 44, the interlocking pin 45 is pulled up. As a result of the lifting, the rack plate 40 is lifted through the crank arm 44, and the rack plate 40 moves upward.

  Further, the upward movement of the rack plate 40 causes the switch lever 50 to swing about the fulcrum pin 52 in the direction in which the end on the magnet support side moves downward (the direction indicated by the arrow in FIG. 1), and the dead hub 60. Rotates in the locking direction (the direction indicated by the arrow in FIG. 1).

  As the dead hub 60 rotates, the pressing piece 64 provided on the outer periphery of the dead hub 60 presses the front side wall of the notch 5 d provided in the dead bolt 5. Due to the pressing, the dead bolt 5 moves toward the locking position.

  FIG. 2 shows a state in which the dead bolt 5 has moved to the locking position. In the locked state of the dead bolt 5, the tip of the lock lever 13 is engaged with the rear edge of the top plate 5a of the dead bolt 5, Lock deadbolt 5 in the locked position.

Further, in the locked state of the dead bolt 5, a first magnet 55 is first proximity switch S ₁ and a counter mounted on the printed circuit board 21 supported on the other end of the switch lever 50, the first proximity switch S ₁ Operates and outputs a lock position detection signal to the control unit 22.

Control unit 22, the detection signal input from the first proximity switch S _1, rotates the drive motor 31 in a direction opposite to the rotation direction of the immediately preceding. By the reverse rotation of the drive motor 31, the output gear 36 rotates in the neutral direction as shown by the arrow in FIG. Output gear 36 is, as shown in FIG. 8 (c), when rotated to the neutral position, the second magnet 56 opposes the third proximity switch S _3. In the opposing position, a third proximity switch S ₃ outputs a stop signal to the control unit 22 operates. The control unit 22 stops the driving motor 31 to reverse rotation by a stop signal inputted from the third proximity switch S _3.

  As described above, when the output gear 36 is returned to the neutral position, the other end of the elongated hole 37 is opposed to the interlocking pin 45 provided at the other end of the crank arm 44 in the circumferential direction.

  In the locked state of the electric lock shown in FIG. 2, when the drive motor 31 is driven and the output gear 36 is rotated in the unlocking direction indicated by the arrow in the figure, the other end of the long hole 37 formed in the output gear 36 is Abutting on an interlocking pin 45 provided at the other end of the crank arm 44, the interlocking pin 45 is pulled down. By the lowering, the rack plate 40 is pulled up via the crank arm 44 and the rack plate 40 moves downward.

  Further, the downward movement of the rack plate 40 causes the switch lever 50 to swing about the fulcrum pin 52 in the direction in which the end portion on the magnet support side moves upward (the direction indicated by the arrow in FIG. 2), and the dead hub 60. Rotates in the unlocking direction (the direction indicated by the arrow in FIG. 2).

  By turning the dead hub 60 in the unlocking direction, the pressing piece 64 provided on the outer periphery of the dead hub 60 presses the pressure receiving piece 18 of the release lever 17, and the release lever 17 swings by the press and the lock lever 13. The protruding piece 16 is pressed.

  When the protrusion 16 is pressed, the lock lever 13 swings in the disengagement direction and the dead bolt 15 is unlocked. In the released state, the pressing piece 64 continues to push the pressure receiving piece 18, so that the dead bolt 5 moves backward and is unlocked as shown in FIG. 1.

In unlocking the dead bolt 5, the first magnet 55 faces the second proximity switch S ₂ mounted on the printed circuit board 21 supported on the other end of the switch lever 50, a second proximity switch S ₂ is actuated Then, the unlock position detection signal is output to the control unit 22.

Control unit 22, the detection signal input from the second proximity switch S _2, rotates the drive motor 31 in a direction opposite to the rotation direction of the immediately preceding. Due to the reverse rotation of the drive motor 31, the output gear 36 rotates in the neutral direction. When the output gear 36 is rotated to the neutral position, the second magnet 56 opposes the third proximity switch S _3. In the opposing position, a third proximity switch S ₃ outputs a stop signal to the control unit 22 operates, the control unit 22 stops the driving motor 31 to reverse rotation by a stop signal inputted from the third proximity switch S ₃ Let

  When the output gear 36 is returned to the neutral position as described above, an interlocking pin in which one end of the long hole 37 is provided at the other end of the crank arm 44 as shown in FIG. 1 and FIG. 45 is in a state of facing in the circumferential direction.

In the switch mechanism of the electric lock in the embodiment, a switch lever 50 that swings in conjunction with the up and down movement of the rack plate 40 is supported by a fulcrum pin 52 that protrudes from the side plate of the substrate case 20 so as to be swingable. Each of the two proximity switches S ₁ and S ₂ operated by the first magnet 55 provided at the other end of the switch lever 50 is supported by the component mounting surface of the printed board 21 accommodated in the board case 20. Therefore, a highly accurate positional relationship can be secured between the proximity switches S ₁ and S ₂ and the first magnet 55. Therefore, each of the proximity switches S ₁ and S ₂ can be reliably operated by the first magnet 55.

DESCRIPTION OF SYMBOLS 1 Lock box 5 Dead bolt 20 Board case 21 Printed circuit board 22 Control part 31 Drive motor 32 Rotating shaft 33 Gear reduction mechanism 36 Output gear 37 Long hole 40 Rack plate 44 Crank arm 45 Interlocking pin 50 Switch lever 52 Supporting pin 55 First magnet (magnet)
60 Dead Hub S ₁ First Proximity Switch (Proximity Switch)
S _2nd proximity switch (proximity switch)

Claims (2)

A lock box, a drive motor whose drive is controlled by a control unit of a printed circuit board incorporated in the lock box, a gear reduction mechanism for reducing the rotation of the drive motor, and the rotation of the output gear of the gear reduction mechanism. It has a dead bolt that is moved forward and backward as a drive source, and two position detection proximity switches that detect the lock position and the unlock position of the dead bolt, and reversely rotates the drive motor by an output signal from the proximity switch In the switch mechanism of the electric lock that let the output gear return to the neutral position,
A rack plate that is moved up and down in conjunction with forward and reverse rotation of the output gear in the lock box, and a dead angle is locked and unlocked by rotating the set bolt forward and backward by a set angle forward and backward movement. A dead hub that moves forward and backward, a switch lever that is connected at one end to the rack plate and swings at a set angle in conjunction with the vertical movement of the rack plate, and a board case that houses the printed board The printed circuit board component is provided with a magnet for operating the proximity switch at the other end of the switch lever by pivotally supporting the central portion of the switch lever by a fulcrum pin provided on the side plate of the board case. The mounting surface is provided with the two proximity switches so as to face each of the stop positions of the magnet that swings together with the switch lever, and the one proximity switch is provided. The detection signal output from the H is the locking signal, the detection signal output from the other proximity switch is the unlocking signal, and the drive motor is rotated in the opposite direction to the previous rotation direction by the output of the signal. An electric lock switch mechanism characterized by that.   An interlocking mechanism that moves the rack plate up and down by forward and reverse rotation of the output gear has an arc-shaped elongated hole on one side of the output gear, and slides an interlocking pin provided at one end of the crank arm in the elongated hole. 2. The switch mechanism for an electric lock according to claim 1, wherein the switch mechanism is configured to be freely fitted and the other end of the crank arm is rotatably connected to the rack plate.

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