JP3362208B2 - Deadbolt control mechanism for motor driven electric lock - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dead bolt control mechanism (hereinafter simply referred to as a control mechanism) for a motor-driven electric lock, and more particularly, to a simple structure and reliable operation. It relates to a control mechanism. 2. Description of the Related Art There are various types of electromagnetic actuators for controlling electric locks. In particular, an electric lock using a DC micromotor as an electromagnetic actuator can increase the operating force of a deadbolt and operate. Because it is reliable, it is frequently used as an electric lock for doors of important facilities and rooms. [0003] However, the electric lock is usually constructed so that it can also be controlled by a cylinder lock in preparation for a power failure or battery exhaustion. In the case of an electric lock using a micromotor as an electromagnetic actuator, a control mechanism for putting a dead bolt in and out of the front plate of the lock box is connected to the micromotor via a speed reducer and also to a cylinder lock. . In this case, if the control mechanism is configured to be constantly connected to the micromotor, the resistance torque of the rotor of the micromotor is increased through the speed reducer to apply the force to the finger for operating the duplicate key during the locking and unlocking operation by the duplicate key. So that
At least the locking and unlocking operation requires a great deal of force, and usually makes the locking and unlocking operation impossible. [0006] Therefore, for example, the electric lock proposed in Japanese Patent Application No. 3-173111 has an electromagnetic clutch inserted in a gear train constituting a speed reducer, and the electromagnetic clutch is energized when the motor is operated. The control mechanism and the micromotor are connected only when the motor is operating. In another motor-driven electric lock, a motor and a control mechanism are connected to each other, and an intermittent feed mechanism such as a general bus stop mechanism is inserted into a gear train constituting a speed reducer to lock and unlock the control mechanism. When the locking operation is completed, the locking / unlocking operation mechanism using the duplicate key is mechanically separated from the gear train. However, an electric lock in which an electromagnetic clutch is inserted in a speed reducer requires at least an electromagnetic clutch and a switch circuit for controlling the same, so that the structure becomes complicated. There is. [0009] In the case where the intermittent feed mechanism is provided in the gear train that constitutes the speed reducer, if a power failure or the like occurs before the locking / unlocking operation is completed, the control mechanism includes both a motor and a locking / unlocking mechanism using a double key. The motor is stopped in a state where is connected, and in some cases, locking and unlocking become impossible. An object of the present invention is to solve the above-mentioned disadvantages and to provide a control mechanism having a simple structure and a reliable operation. In order to achieve the above object, the invention according to claim 1 is rotatably supported on a side plate of a lock box, and engages with a dead bolt to disengage it. A dead cam connected to the inner cylinder of the cylinder lock, a sector gear coaxially and integrally connected with the dead cam, and an operating arm for projecting and retracting from the front plate of the lock box. A micromotor that rotates in a locking direction or an opposite unlocking direction in response to a lock signal, a differential gear device connected to an output shaft of the micromotor via a speed reducer, and a planetary gear of the differential gear device Along the trajectory of the gear,
A locking receiving gear and an unlocking receiving gear, which are arranged in such a positional relation as to sandwich the planetary gears and are spaced apart so that the planetary gears can move freely, and a locking follower for connecting the locking receiving gear and the sector gear; A gear train, an unlocking driven gear train for connecting the unlocking receiving gear and the sector gear, and the module and the number of teeth of the locking receiving gear and the unlocking receiving gear,
Locking and unlocking of the dead bolt can be performed within one rotation of these gears, and the tooth width of at least one tooth of the locking receiving gear and the unlocking receiving gear is larger than the other. It is characterized in that, when the locking or unlocking operation is completed, the releasing teeth push the swing arm of the differential gear device in the radial direction to break the gear train when the locking or unlocking operation is completed. And In the control mechanism according to the first aspect of the present invention, the planetary gear of the differential gear device is connected to the locking receiving gear and the unlocking gear during locking or unlocking. It is intermediate with the receiving gear and does not mesh with any of these gears.
That is, when the previous locking or unlocking operation is completed, the release teeth formed on the locking receiving gear or the unlocking receiving gear push the swing arm carrying the planetary gear in the direction of disengaging with the planetary gear. Because it moved. Therefore, it is needless to say that the dead cam and the micromotor are mechanically separated from each other, and the dead cam can be operated independently of the micromotor by the cylinder lock. Thus, for example, when an unlocking signal is generated during locking, the micromotor rotates in the unlocking direction, and this rotation is transmitted to the differential gear device via the speed reducer, so that the swing arm is unlocked. , The planetary gear at the tip thereof meshes with the unlocking receiving gear. Thereafter, the rotation of the swing arm stops, but the rotation of the micromotor is transmitted to the sector gear via the planetary gear of the differential gear device, the unlocking receiving gear, and the unlocking driven gear train, and the dead cam is transmitted. Swings the operating arm and retracts the deadbolt into the lock box. At the same time, the release teeth formed on the unlocking receiving gear push the swing arm in a direction to disengage the planetary gear and the unlocking receiving gear, and as a result, the micromotor and the sector gear are connected. It is mechanically separated. Next, the control circuit of the electric lock, which is not the gist of the present invention and is not described, is activated, and the power supply to the micromotor is cut off. Next, when a locking signal for locking is generated,
The micromotor rotates in the direction opposite to that during the unlocking operation. Therefore, by the function of the differential gear device, the swing arm rotates in the opposite direction to that at the time of unlocking, and the planetary gear comes to mesh with the locking receiving gear. Thereafter, the rotation of the swing arm stops, but the rotation of the micromotor is transmitted to the sector gear via the planetary gear, the locking receiving gear, and the locking driven gear train of the differential gear device, and the dead cam operates. The arm is shaken so that the deadbolt protrudes from the front plate of the lock box, and is inserted into the deadbolt receiving hole of the door frame to lock the electric lock. At the same time, the projecting teeth formed on the locking receiving gear push the swing arm in a direction to disengage the planetary gear and the locking receiving gear, so that the micromotor and the sector gear are mechanically connected. Is cut off. Next, the control circuit of the electric lock, which is not the gist of the present invention and is not described, is activated, and the power supply to the micromotor is cut off. At this time, since the unlocking receiving gear is connected to the locking receiving gear via the unlocking driven gear train, the sector gear and the locking driven gear train, the unlocking receiving gear is interlocked with the locking receiving gear. The unlocking receiving gear rotates in the opposite direction to the unlocking direction, and the protruding teeth formed on the unlocking receiving gear rotate to an angular position that does not interfere with the swing arm, and the next unlocking gear rotates. Wait for lock operation. Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a lock box, and the lock box 1 is mounted on the free side edge of the door. A dead bolt 2 is provided below the lock box 1. Dead bolt 2 in the illustrated embodiment
A guide pin 2a implanted at the inner end is slidably engaged with a guide groove 3 formed in a side plate of the lock box 1 and a dead bolt opening 4a having a distal end opened in the front plate 4. By being slidably fitted, it is guided so as to be movable in the front-rear direction (left-right direction in FIG. 1) perpendicular to the front plate 4. An operating plate 5 is integrally connected to the dead bolt 2, and an engagement notch 5a having a stop surface is formed at an upper end of the operating plate 5 in the conventional dead bolt 2. Is the same as A dead cam 6 is disposed above the dead bolt 2. The dead cam 6 is rotatably supported on a side plate of the lock box 1. The dead cam 6 is connected to the inner cylinder of the cylinder lock via a tailpiece (not shown) inserted into a deformed engagement hole 6a opened at the center, and is connected to the engagement notch 5a of the operation plate. The engaging arm 6b engaged and radially extended and the sector gear 6c coaxial with the dead cam 6 are integrally connected. On the other hand, above the lock box 1, a micromotor 7 is disposed with its output shaft facing downward. A first bevel gear 8 is mounted on this output shaft. The first bevel gear 8 has a larger diameter than the second bevel gear 8.
The bevel gear 9 is engaged with the second bevel gear 9, and a sun gear 11, which is a small-diameter spur gear, is coaxially and integrally connected to the second bevel gear 9. The first bevel gear 8 and the second bevel gear 9 constitute a reduction gear. One end of a swing arm 12 is rotatably supported on the rotation shafts of the second bevel gear 9 and the sun gear 11, and is rotatably supported on the other end of the swing arm 12. The planetary gear 13 meshes with the sun gear 11. The sun gear 11, the swing arm 12, and the planetary gear 13 constitute a known differential gear unit 14. A locking receiving gear 15 and an unlocking receiving gear 16 are arranged along the rotation locus of the planetary gear 13 around the sun gear 11. The locking receiving gear 15 and the unlocking receiving gear 16 can engage with the planetary gear 13 with the planetary gear 13 interposed therebetween and with a space between them so that the planetary gear 13 can move freely. It is provided in. The locking receiving gear 15 and the unlocking receiving gear 16 mesh with the sector gear 6c via idle gears 17, respectively. Here, a gear train extending from the locking receiving gear 15 to the sector gear 6c is collectively referred to as a locking driven gear train 18, and a gear train extending from the unlocking receiving gear 16 to the sector gear 6c is generally referred to as an unlocking driven gear train 19. I will do it. Further, the modules and the number of teeth of the locking receiving gear 15 and the unlocking receiving gear 16 are set so that the locking and unlocking operation of the deadbolt 2 can be completed within one rotation of these gears. ing. In addition, the receiving gear 15 for locking and the receiving gear 16 for unlocking are formed with protruding teeth 21 respectively. In the illustrated embodiment, a vertical line is drawn on the side of the protruding tooth to distinguish the protruding tooth from other teeth. As shown in FIGS. 2 and 3, each protruding tooth 21 is formed by setting a tooth width of one tooth of a gear having bosses integrally provided on both sides thereof to be larger than that of another tooth. 3 so that the extended portion of the tooth width engages with the swing arm 12.
1 is assembled so that the right boss in FIG. Although this is not an essential component of the present invention, in the illustrated embodiment, the tip of the swing arm 12 is formed so as to be thin, and the swing arm is swung clockwise or counterclockwise. When engaged with the locking receiving gear 15 or the unlocking receiving gear 16 to engage with the lock receiving gear 15, the tip of the swing arm comes into contact with the outer peripheral surface of the gear boss,
Excessive engagement between the planetary gear 13 and the receiving gear 15 (16) is prevented. With the above structure, when the first bevel gear 8 rotates in the direction of the arrow in FIG. 1, that is, clockwise as viewed from below, the second bevel gear 9 and the sun gear 11 integrated therewith.
Is rotated in a counterclockwise direction, and the swing arm 12 is rotated in a counterclockwise direction by the counterclockwise rotation of the sun gear 11, so that the planetary gear 13 meshes with the unlocking receiving gear 16. That is, the rotational force of the micromotor 7 is transmitted to the unlocking driven gear train 19 using the differential gear device 14 as a kind of clutch. As a result, the sector gear 6c rotates counterclockwise in FIG. 1, and the operating arm 6b engages with the engagement notch 5a of the dead bolt to push the dead bolt 2 inward and lock the dead bolt. Unlock the electric lock by pulling it into the box. At the same time, the release teeth 21 formed on the unlocking receiving gear 16 are pushed to kick the swing arm 12. Therefore, the planetary gear 13 is mechanically separated from the unlocking driven gear train 19. On the other hand, when a lock signal is generated during unlocking, the micromotor 7 rotates in the opposite direction to rotate the swing arm 12 clockwise in FIG. Therefore, the rotating force of the micromotor 8 is connected to the locking driven gear train 18, and the dead cam 6 rotates clockwise to rotate the dead bolt 2.
Into a dead bolt input hole of a strike plate (not shown) to lock. At the same time, the separating piece 21 connected to the locking receiving gear 15 pushes the swing arm 12 so as to rotate counterclockwise (see FIG. 1), and locks the rotational force from the micromotor 7. The transmission to the driven gear train 18 is cut off.
Thereafter, the power supply to the micromotor 7 is cut off after a certain period of time, as described above. In FIG. 1, reference numeral 22 denotes an open leg spring in which both ends of the torsion coil spring are extended.
One end of 2 is rotatably hung on the dead cam 6 and the other end is hung on a fixing pin in the lock box 1. The open leg spring 22 acts as a resistance in the initial stage of the rotation for locking or unlocking the dead cam 6, but when it exceeds a conceivable point, it urges the dead cam 6 to turn it over. It provides snap action to operation, but is not an essential component of the present invention. As is apparent from the above description, the present invention utilizes a simple differential gear device and swings a swing arm to rotate a planetary gear and a locking receiving gear or an unlocking receiving gear. Since the connection and disconnection with the gear are performed, it is possible to obtain a fully-tightened electric lock that can be manually locked and unlocked by the cylinder lock with a simple configuration. For the same reason, even if a power failure occurs during the locking / unlocking operation, the planetary gear is disengaged from the locking or unlocking receiving gear by turning the duplicate key in the opposite direction by the manual locking / unlocking operation. Therefore, there is no danger that the locking / unlocking operation becomes impossible compared to a motor-driven electric lock having an intermittent feed mechanism such as a Geneva clutch mechanism. Further, since the differential gear device and the driven or unlocked driven gear train can use spur gears, various effects such as good transmission efficiency of the rotating force of the micromotor can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial cross-sectional side view of a motor-driven electric lock according to an embodiment of the present invention. FIG. 2 is a side view of a receiving gear for locking (for unlocking). Fig. 3 Fig. 2III-II of a receiving gear for locking (for unlocking).
FIG. 4 is a vertical sectional view taken along line I. [Description of Signs] 1 lock box 2 dead bolt 4 front plate 5a engagement notch 6 dead cam 6a engagement hole 6b operating arm 6c sector gear 7 micro motor 11 sun gear 12 swing arm 13 planetary gear 14 differential gear device 15 locking Receiving gear 16 unlocking receiving gear 18 locking driven gear train 19 unlocking driven gear train 21 protruding teeth

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E05B 47/00

Claims (1)

(57) [Claim 1] An operating arm which is rotatably supported by a side plate of a lock box, engages with a deadbolt, and protrudes and retracts from a front plate of the lock box. A dead cam connected to the inner cylinder of the cylinder lock, a sector gear coaxially and integrally connected to the dead cam, and a locking direction at the time of application and unlocking, and a locking direction according to the application and unlocking signals, or an unlocking direction in the opposite direction. , A differential gear connected to the output shaft of the micromotor via a speed reducer, and a positional relationship such that the planetary gear is sandwiched along the movement locus of the planetary gear of the differential gear. And a receiving gear for locking and a receiving gear for unlocking which are arranged with an interval at which the planetary gears can float,
A locking driven gear train for connecting the locking receiving gear and the sector gear, and an unlocking driven gear train for connecting the unlocking receiving gear and the sector gear, wherein the locking receiving gear and the unlocking gear are provided. The receiving gear module and the number of teeth are set such that the dead bolt can be locked and unlocked within one rotation of these gears, and at least one tooth of the locking receiving gear and the unlocking receiving gear is set. When the locking or unlocking operation is completed, these teeth push the swing arm of the differential gear device in the radial direction to form a gear train. A dead bolt control mechanism for a motor-driven electric lock, wherein the dead bolt is divided.