JP5072325B2 - Electric lock - Google Patents

Description

  The present invention relates to an electric lock.

  As an electric lock in which a drive unit using an actuator is previously unitized, the one described in Patent Document 1 is known. In this conventional example, the electric lock is configured such that a dead bolt accommodated in the lock case is driven forward and backward by a drive control unit (power unit). The power unit is formed by accommodating a power transmission mechanism such as an actuator and a gear train and a printed mounting board in a flat container, and a switch drive plate as a power output unit is pulled out from the flat container.

  The electric lock is assembled by connecting the switch drive plate of the power unit to a dharma previously arranged in the lock case. When the power unit is started in the assembled state, the dharma is rotated by the straight operation force of the switch drive plate. The dead bolt connected to the dharma is driven back and forth.

  However, the above-described conventional example has a drawback that the driving force generated in the power unit is taken out as the reciprocating driving force of the switch driving plate, so that the driving unit lacks versatility, resulting in an increase in manufacturing cost.

  That is, in the above conventional example, the projecting direction, the projecting distance, the reciprocating stroke, etc. of the switch drive plate from the lock case are all determined by the drive unit. It can be used only when the stroke or the like matches these, and if any of them is different, a new drive unit needs to be set.

In order to solve this problem, as described in Patent Document 2, it is effective to use the output of the power unit as a rotational output. However, in the conventional example described in Patent Document 2, the power unit Since it is necessary to attach the clutch gear or the like to the lock case after attaching, the assembly workability is poor.
Japanese Patent Laying-Open No. 2005-282302 JP 2006-193990 A

  The present invention has been made to eliminate the above drawbacks, and by using a drive unit having excellent versatility, an electric lock that can reduce manufacturing costs and has good assembly workability. The purpose is to provide.

  The dead bolt 2 accommodated in the lock case 11 can be locked and unlocked by rotating the dead bolt operating portion 3. The dead bolt operating portion 3 is rotated by rotating the input gear 1. This can be done by applying power.

  On the other hand, the power unit 7 is accommodated in the unit case 4, and the power of the actuator 5 in the unit case 4 can be taken out from the rotation output shaft 6. The relay gear 8 connected to the rotation output shaft 6 and the dead bolt operation unit When the three input gears 1 are connected to each other using the rack rod 10, the dead bolt 2 using the power unit 7 can be driven.

  In the present invention in which the output of the power unit 7 is a rotational operation, the same power unit is used when the distance is the same even if the positional relationship between the rotation output shaft 6 of the power unit 7 and the deadbolt operation unit 3 is different. 7. The rack 10 can be used as it is, and if the intervals are different, it is possible to cope with the change of model by changing only the rack 10. As a result, the same power unit 7 can be shared by multiple models.

The deadbolt drive unit is assembled by fixing the power unit 7 to the lock case 11 and then fitting and fixing the relay gear 8 to the rotary output shaft 6 so that the deadbolt operation unit 3 disposed in the lock case 11 in advance. Since the rack cage 10 is simply bridged between the input gear 1 and the relay gear 8, the assembly workability is improved.
According to the present invention,
A deadbolt operation unit that locks and unlocks the deadbolt by rotation of the input gear;
A power unit housed in the unit case and outputting the power of the actuator from the rotation output shaft via the gear train;
A relay gear connected to the rotation output shaft of the power unit;
It is possible to provide an electric lock which is provided with racks at both ends and which houses a rack cage which transmits the rotational power of the relay gear to the input gear of the dead bolt operation unit.

  In this case, if the rack cage 10 is guided using the guide gap 12 formed between the unit case 4 and the wall surface of the lock case 11, a special guide member is not required, and the fixing work of the guide member is not required. Moreover, the number of parts is also reduced.

  According to the present invention, by using a power unit having excellent versatility, the manufacturing cost can be reduced and the assembly workability can be improved.

  As shown in FIG. 1, the electric lock includes a dead bolt 2 accommodated in a lock case 11. The front end face of the lock case 11 is provided with a mounting plate 11a for providing a flange for fixing to the door body when being inserted and fixed in a door body (not shown), and for hiding the mounting screw after being fixed to the door body. The decorative plate 11b is screwed. In the present specification, the direction in which the dead bolt 2 protrudes is “front”, and “up and down” and “side” are determined based on the posture fixed to the door body.

  The dead bolt 2 is formed to be long in the front-rear direction by bending the plate material into a U-shaped cross section, and as shown in FIG. 1 (a), the front end penetrates the mounting plate 11a and the decorative plate 11b to the outside of the lock case 11. As shown in FIG. 1 (b), the locking position that pops out moves forward and backward between the unlocking position immersed in the lock case 11.

  In order to drive the dead bolt 2, the power unit 7 is fixed in the lock case 11. As will be described later, the power unit 7 is configured to output a rotation output to the rotation output shaft 6 based on a predetermined operation command, and the rotation power output to the rotation output shaft 6 is coupled to the rotation output shaft 6. Is transmitted to the rotating cam (dead bolt operating portion 3) via a relay gear 8 composed of a spur gear and a rack rod 10 meshing with the relay gear 8. The rotating cam 3 is integrally formed with a gear portion (input gear 1) that meshes with one rack 9 of the rack cage 10. When the rotating cam 3 is driven to rotate, the dead operation link portion 3a of the rotating cam 3 presses the operation protruding portion 2a projecting from the rear end of the dead bolt 2 to drive the dead bolt 2 forward and backward.

  As shown in FIG. 2A, the rack cage 10 is formed with racks 9 at both ends of a rack plate 10a. The rack 9 that is positioned above and meshes with the relay gear 8 is formed by fixing a synthetic resin material to the rack plate 10a, and is positioned below and meshes with the gear portion 1 of the rotary cam 3. The rack 9 is formed on the rack plate 10a itself. The rack plate 10a is formed in an L shape by bending a metal plate material. In addition, a guide piece 10b that is wide to widen the guide surface is formed in the middle portion of the rack plate 10a.

  On the other hand, a guide gap 12 is formed between the outer wall of the power unit 7 and the inner wall surface of the lock case 11. After being placed on the rotating cam 3, the lock case 11 is simply set to a predetermined position.

  Further, the cylinder lock 19 and the thumb turn device 20 can be connected to the electric lock as an operating means of the dead bolt 2 that does not depend on the power unit 7. As shown in FIG. 3, when the mounting protrusion 21 such as the cylinder lock 19 is inserted through the mounting hole 11 c facing the rotation cam 3 and is fixed to the lock case 11, the cylinder lock 19 is opened. The connector 22 that rotates by the operation of the cam or the like is inserted into the cam hole 3 b of the rotating cam 3.

  As will be described later, the rotation output shaft 6 is free to rotate in the locking / unlocking reversal direction. When the cylinder lock 19 or the like is operated in the direction to reverse the current state, the rotation cam 3 is rotated without being restricted by the power unit 7. The dead bolt 2 can be moved to the reverse position.

  Details of the power unit 7 are shown in FIG. The power unit 7 is formed by housing in the unit case 4 a motor 5 as the actuator 5, a gear train for converting the power of the motor 5 into the rotational power of the rotation output shaft 6, and switches necessary for controlling the motor 5. Is done. The gear train is configured to transmit the rotation of the worm 23 fixed to the rotation shaft of the motor 5 in the order of the worm wheel 24, the first gear 25, the second gear 26, the final gear 13, and the rotation output shaft 6. Is done.

  As shown in FIG. 5, the unit case 4 is provided with a lead-in port 16 for the lead wire 15 for supplying power to the motor 5 and the like, and a bent wire accommodating portion 17 is defined in the vicinity of the lead-in port 16. . The lead-in port 16 is opened at the rear of the upper end portion, and the bent wire accommodating portion 17 is set as a vertically long region with the pull-in port 16 as the upper end.

  In addition, a cylindrical wire guide portion 17 a is erected at the center of the bent wire housing portion 17, and a drain hole 18 is formed in the lowest bottom wall portion of the bent wire housing portion 17. As shown in FIG. 5, the lead wire 15 drawn into the bent wiring housing portion 17 from the drawing port 16 is bent so as to wind the wiring guide portion 17a, and then wired so as to be folded upward. After the wiring work is completed, a harness presser 27 is attached to the bent wiring housing portion 17 and the vicinity thereof to prevent the lead wire 15 from being caught in the gear.

  As shown in FIG. 1, the unit case 4 configured as described above is fixed to the lock case 11 with the drawing port 16 exposed from the lock case 11. When fixing to the lock case 11, the hollow portion of the wiring guide portion 17 a is used as a space for inserting a fixing screw.

  Therefore, in this embodiment, when rainwater or the like enters the lock case 11, more precisely, the unit case 4 through the lead wire 15, the bent portion is bent downward in a convex shape in the bent wiring housing portion 17. It stays in the part and then drops. The dropped water droplets were discharged into the case from the drain hole 18 of the unit case 4, and then moved downward through a water guide gap formed between the outer wall surface of the unit case 4 and the inner wall surface of the lock case 11. Thereafter, it is discharged out of the lock case 11 and does not enter the lock case 11, in particular, the region where the energized parts and the like are arranged.

  Further, as shown in FIGS. 5 and 6, the gear train is accommodated in a power unit storage area 28 surrounded by a partition wall 28a. The power unit storage area 28 surrounds all or most of the range from the motor 5 to the final gear 13. In this embodiment in which the power unit storage region 28 is disposed adjacent to the bent wire housing portion 17, the partition wall of the power unit storage region 28 shares a part of the partition wall surrounding the bent wire housing portion 17.

  When the power unit storage area 28 is partitioned by the partition wall and the gear train is accommodated in this way, it is possible to prevent grease from flowing out and mixing in foreign matter. It can be effectively prevented.

  The rotation output shaft 6 and the final gear 13 are connected via a clutch 14. As shown in FIG. 7, the clutch 14 includes a clutch plate 14 a that is formed in a semicircular shape by a leaf spring and connected to the final gear 13, and a connection recess 14 b on the rotation output shaft 6 side. The clutch plate 14a has a connecting projection 14c formed at the center thereof and is fitted into the connecting recess 14b of the rotation output shaft 6 to connect the rotation output shaft 6 and the final gear 13 in the rotation direction.

  When the final gear 13 becomes inoperable due to a failure or the like, when a rotational torque greater than a predetermined value is applied to the rotation output shaft 6, the connection convex portion 14b of the clutch plate 14a receives a force from the contact portion with the connection concave portion 14b. And elastically deforms in the direction in which the protruding height decreases. When a rotational torque is further applied from this state, the fitting with the connection recess 14b is eventually released, and the rotation output shaft 6 can idle with respect to the final stage gear 13.

  As shown in FIGS. 7B and 7C, by extending the connection recess 14b in the circumferential direction, the rotation output shaft 6 and the final gear 13 correspond to the locking / unlocking operation stroke. An idle angle is set, and the final gear 13 is controlled to return to the initial rotation position after the drive operation of the rotation output shaft 6 is completed.

  In the present embodiment, the rotation output shaft 6 corresponds to the unlocking operation in the clockwise direction and the locking operation in the counterclockwise direction. Taking the locking operation from the unlocked state shown in FIG. 7B as an example. First, the motor 5 drives the last gear 13 to rotate counterclockwise. As the final gear 13 rotates, the rotation output shaft 6 also rotates counterclockwise and reaches the locking rotation position. Thereafter, the motor 5 is driven in reverse to rotate the last gear 13 clockwise to return to the initial rotation position. Since the play angle is set in the return direction of the final gear 13, the reverse rotation operation is performed without being accompanied by the rotation drive to the rotation output shaft 6, and the locking operation completion state of FIG.

  In this state, the rotation output shaft 6 is rotated clockwise, that is, a play angle that allows rotation in the unlocking operation direction is formed. Therefore, the unlocking operation using the locking / unlocking operation device such as the cylinder lock 19 is finally performed. This can be done without being restricted by the step gear 13.

  As shown in FIG. 7 (d), when the return to the initial rotation position of the final gear 13 is not completed due to the failure of the motor 5, the battery running out, etc., the clutch 14 is operated as described above. Thus, the rotation operation from the rotation output shaft 6 side can be performed.

  Reference numeral 29 denotes a control board for controlling the motor 5 and a mounting board on which various sensors are mounted. A reed switch 29a for detecting a magnet (not shown) fixed to the door frame side and detecting an open / closed state of the door body is fixed to the front end portion of the mounting substrate 29.

  As shown in FIG. 6, the final gear 13 and the rotation output shaft 6 are rotatably fitted to a support shaft 4 a protruding from the unit case 4, and the mounting substrate 29 is a circle of the rotation output shaft 6. It arrange | positions so that it may be pinched | interposed into the board part 6a and the last stage gear 13. FIG. Reference numeral 29b denotes an insertion hole formed in the mounting substrate 29 for inserting the shaft portion of the rotation output shaft 6.

  In order to detect the rotational position of the output rotary shaft, a pattern for detecting the axial position is formed on the mounting substrate 29. As shown in FIG. 8, the pattern includes a ring-shaped reference potential pattern 30 coaxial with the rotation output shaft 6, and a detection pattern 31 that is not in contact with the reference potential pattern 30 and is concentric with the reference potential pattern 30. It consists of. In the detection pattern 31, one pair is used as a locked state detection pattern and the other pair is used as an unlocked state detection pattern with point symmetry positions as pairs.

  On the other hand, a brush 32 that can contact the reference potential pattern 30 and the detection pattern 31 is fixed to the rotation output shaft 6 as shown in FIGS. The brush 32 is formed of a metal material having good conductivity, and as shown in FIG. 8C, a contact protrusion 32a is formed at the free end.

  Therefore, in this embodiment, as shown in FIG. 9A, when the rotary output shaft 6 is in the locked rotation position, the brush 32 contacts the reference potential pattern 30 and the locked state detection pattern 31 to short-circuit both. . When the lock state detection pattern 31 detects a change of the reference potential pattern 30 to the potential (for example, the ground level), the control unit (not shown) determines the lock state. Similarly, as shown in FIG. 9B, when the rotation output shaft 6 is at the unlocking rotation position, the unlocking state detection pattern 31 is short-circuited to the reference potential pattern 30, and the unlocking state is detected by the control unit. The

  Further, as described above, in order to detect the initial rotational position of the final gear 13, the brush 32 is fixed to the surface of the final gear 13 facing the mounting substrate 29, and the reference potential pattern 30 is mounted on the mounting substrate 29. As a result, a detection pattern 31 is formed. The brush 32 and the reference potential pattern 30 have the same configuration as that used for the rotation output shaft 6 described above, and a pair of detection patterns 31 are formed at positions corresponding to the initial rotation position.

  FIG. 10A shows the final gear 13 and FIG. 10B shows the detection state of the initial rotational position.

  In addition, a magnetic sensor 33 is mounted on the power unit 7 and the locked state of the dead bolt 2 is detected. In this embodiment, the locked state is detected by detecting the position of the lock member 34 that restricts the dead bolt 2 to the locked position and restricts the movement to the unlocked position. Thus, when the locked state is determined by the lock member 34 of the dead bolt 2, for example, when the dead bolt 2 is easily moved to the unlocked position due to a malfunction, the locked state is not determined. Therefore, reliability is improved.

  As shown in FIGS. 11 and 12, the lock member 34 is pivotally supported in the vicinity of the dead bolt 2 so as to be swingable. The lock member 34 is formed of a synthetic resin material in order to prevent magnetic flux absorption of a magnet, which will be described later, and is formed by holding a metal lock rod 34a at the swing end. As shown in FIG. 1A, the lock member 34 rotates around the pivot 34b so that the lock rod 34a is engaged with an engagement portion 2b formed at the rear end portion of the dead bolt 2 so that the dead bolt 2 As shown in FIG. 1B, the torsion spring moves between a lock rotation position that restricts the movement to the unlocking position side and a non-lock rotation position at which the engagement with the engagement portion 2b is released. 34c is urged toward the lock rotation position.

  When the rotating cam 3 is rotated to the unlocking rotation position side in the locking position shown in FIG. 11A, the operating piece 34d of the locking member 34 is pushed up by the dead operation link portion 3a of the rotating cam 3, and the locking member 34 is , The lock bolt 34a is unlocked to the locking portion 2b, and thereafter the dead bolt 2 is driven to the unlocked position side.

  On the other hand, when the rotating cam 3 rotates to the locking rotation position side when the dead bolt 2 is in the unlocked position, the dead operation link portion 3a of the rotating cam 3 is separated from the operating piece 34d of the lock member 34, and the dead bolt 2 moves backward. As shown in FIG. 1A, when the dead bolt 2 reaches the locked position, the lock rod 34a that has been riding on the upper edge of the dead bolt 2 in the unlocked position is moved to the locking portion 2b by the restoring force of the torsion spring 34c. After that, the movement of the dead bolt 2 in the direction of the release position is restricted.

  The detection of the locking position of the dead bolt 2 is performed by detecting the magnet 34e fixed to the rocking end of the lock member 34 by the magnetic sensor 33 on the mounting board 29 side. As described above, in this embodiment in which the magnet is separated from the magnetic sensor 33 in the locked state, the case where the magnetic sensor 33 does not detect the magnetic flux is determined as “locked”, and the case where it is detected is determined as “unlocked”.

It is a figure which shows this invention, (a) is a figure which shows a locked state, (b) is a figure which shows an unlocked state. It is a figure which shows a rack cage | basket, (a) is an exploded perspective view of a rack cage | basket, (b) is an exploded perspective view which shows the assembly state of the rack cage | basket to a lock case, (c) is 2C-2C of Fig.1 (a). It is line sectional drawing. It is sectional drawing which shows the state which mounted | wore with the cylinder lock. It is a figure which shows a power unit, (a) is an external appearance perspective view, (b) is a front view which shows an inside. It is a figure which shows a bending wiring accommodation part, (a) is a front view, (b) is a perspective view, (c) is a 5B direction arrow directional view of (a). It is sectional drawing of a power unit, (a) is the 6A-6A sectional view taken on the line of FIG.4 (b), (b) is the 6B-6B sectional view of FIG.4 (b), (c) is FIG.4 (b). FIG. 6 is a sectional view taken along line 6C-6C. It is a figure which shows a clutch, (a) is a disassembled perspective view, (b) is a figure which shows an unlocked state, (c) is a figure which shows a locked state, (d) is a figure which shows the state which the last stage gear stopped halfway It is. It is a figure which shows the rotation angle detection of a rotation output shaft, (a) is a figure which shows a mounting substrate, (b) is a figure which shows a rotation output shaft, (c) is a 8C direction arrow directional view of (b). It is explanatory drawing which shows the operation | movement of FIG. It is a figure which shows the rotation angle detection of the last stage gear, (a) is a figure which shows a last stage gear, (b) is a figure which shows a detection state. It is a figure which shows locking detection, (a) is a figure which shows a locked state, (b) is a figure which shows an unlocked state. It is a figure which shows a locking member, (a) is a perspective view of a locking member, (b) is an exploded perspective view which shows the assembly | attachment state to a lock case, (c) is the 12C-12C sectional view taken on the line 12C-12 of FIG. is there.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Input gear 2 Deadbolt 3 Deadbolt operation part 4 Unit case 5 Actuator 6 Rotation output shaft 7 Power unit 8 Relay gear 9 Rack 10 Rack cage 11 Lock case 12 Guide gap 13 Final gear 14 Clutch 15 Lead wire 16 Pull-in port 17 Bending wire accommodating part 18 Drain hole

Claims (5)

A deadbolt operation unit that locks and unlocks the deadbolt by rotation of the input gear;
A power unit housed in the unit case and outputting the power of the actuator from the rotation output shaft via the gear train;
A relay gear connected to the rotation output shaft of the power unit;
Ri Na accommodates a rack rod for transmitting the rotational power of the relay gear comprises a rack input gear deadbolt operating unit to lock the case at both ends,
The power unit includes a control unit that rotates the final gear of the gear train from the initial rotation position to the locking / unlocking position and then returns to the initial rotation position.
An electric lock in which an idle angle corresponding to a drive angle of the final gear is set between the final gear and the rotation output shaft . The intermediate portion of the rack cage is formed in a plate shape orthogonal to the rack forming surface,
The electric lock according to claim 1, wherein a guide gap is formed between the unit case and the wall surface of the lock case so that an intermediate portion of the rack cage is inserted to guide an operation direction of the rack cage. 3. A clutch that slips when a predetermined torque is applied to the rotary output shaft in a state where the final gear is stopped is interposed between the final gear of the gear train and the rotary output shaft . Electric lock. In the vicinity of the lead-in port of the lead wire connected to the current-carrying component in the unit case, a bent wiring accommodating portion that can accommodate a lead wire bent downward in a convex shape is defined,
The electric lock according to claim 1, 2, or 3, wherein a drain hole that is opened outward from the unit case is formed on a bottom surface of the bent wire housing portion . The electric lock according to any one of claims 1 to 4, wherein the actuator and the gear train are partitioned from a remaining region in the unit case by a partition wall erected on the unit case .

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