JP2008075381A - Electric lock device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high-security electric lock device which realizes downsizing and energy savings, and which can surely maintain locked and unlocked states. <P>SOLUTION: This electric lock device comprises: a first cam with a cam plate 2b, which is integrally rotatably connected to an output shaft M1 of a motor; a second cam which is rotatably connected to the output shaft of the motor, and which is rotated by undergoing the transmission of the rotational force of the first cam via a rotary driving portion 4b; a key member A which is connected to the second cam, and which comprises a rod 9 and a sliding member moving to a locking or unlocking position in accordance with the rotational direction of the second cam; and a locking mechanism R which is connected to the first cam, and which is moved to an inhibiting or allowable position, along with the rotation of the first cam. When the motor is driven, the first cam is rotated integrally with the motor so as to move the locking mechanism to the allowable position, and so as to move the key member to the locking or unlocking position via the second cam. When the key member is located in the locking or unlocking position, the locking mechanism is moved to the inhibiting position so as to inhibit the movement of the key member. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electric lock device that performs locking or unlocking as a motor rotates.

2. Description of the Related Art Conventionally, there has been known an electric lock device that locks windows, doors, and the like by causing a key member such as a dead bolt to protrude along with the rotation of a motor and causing the protruding key member to enter a key holder.
Such an electric lock device includes a lock mechanism for restricting the movement of the key member so that the key member does not move from the locked position or the unlocked position due to vibration or impact. For example, by energizing a solenoid, the lock mechanism causes the iron core to protrude into the movement locus of the key member, and the key member moves from the locked position to the unlocked position, or moves from the unlocked position to the locked position. I try to regulate that.
JP-A-6-33646

According to the conventional electric lock device, the lock mechanism is provided so that the key member holds the locked position or the unlocked position even when vibration or impact occurs.
As described above, when the lock mechanism is provided in the electric lock device, a drive source for operating the key member and a drive source for operating the lock mechanism must be provided separately. This is because the key member and the lock mechanism are different in operating timing, moving direction, or moving distance.
However, if the drive source for driving the motor and the drive source for driving the lock mechanism are provided separately, the electric lock device will be enlarged correspondingly, and it may be attached to a place where installation space such as a window frame is limited. There was a problem that it was impossible.
In addition, in order to perform locking or unlocking, two drive sources must be driven, so that there is a problem that required electric energy is increased.

  An object of the present invention is to use a cam mechanism to operate a key member and a lock mechanism with a single drive source, to realize downsizing and energy saving, and to securely hold a locked and unlocked state. It is to provide an electric lock device with high safety.

  According to a first aspect of the present invention, there is provided a motor, a first cam coupled to the drive shaft of the motor so as to be integrally rotatable, a first cam rotatably coupled to the drive shaft of the motor, and a first cam rotated by the rotational force of the first cam. 2 cams, a key member that is connected to the second cam and that moves to a locking position or an unlocking position according to the rotation direction of the second cam, and is connected to the first cam and is used to rotate the first cam. And a lock mechanism that moves to a restraining position that inhibits movement of the key member or an allowable position that allows movement of the key member, and when the motor is driven, the first cam rotates integrally with the motor to When the lock mechanism is moved to an allowable position, the key member is moved to the lock position or the unlock position via the second cam, and the lock mechanism is inhibited when the key member is located at the lock position or the unlock position. Characterized in that to suppress the movement of the key member is moved to the location.

The second invention is characterized in that after the first cam rotates to move the lock mechanism to the allowable position, the first cam rotates the second cam to move the key member to the locked position or the unlocked position. Have
In a third aspect of the invention, the first cam includes a pair of transmission portions and a lock mechanism retracting portion provided between the pair of transmission portions, while the second cam is located within the rotation locus of the transmission portion. When the first cam rotates, the transmission mechanism comes into contact with the rotation drive unit and rotates the second cam with the lock mechanism retracting unit moving the lock mechanism to an allowable position. It is characterized in that

According to the first invention, since the key member and the lock mechanism are operated by the same motor by providing the cam mechanism, a drive source for the lock mechanism is provided separately from the motor for operating the key member. There is no need to provide.
Thus, since only one drive source consisting of a motor is required, the entire electric lock device can be reduced in size, and the first cam and the second cam are provided coaxially. The space in the width direction can be further reduced.
Therefore, the apparatus can be reliably installed in a place where space such as a window frame is limited.
Moreover, since one motor should just be driven when locking or unlocking, energy consumption can be reduced and energy saving can be implement | achieved compared with the past.

According to the second invention, since the key member is moved after the lock mechanism is moved to the permissible position, the key member and the lock mechanism come into contact with each other and are damaged or the smooth movement of the key member is hindered. There is nothing.
According to the third aspect, since the lock mechanism retracting portion is provided between the pair of transmission portions, the lock mechanism can be reliably moved to the allowable position before the transmission portion contacts the rotation driving portion.
Therefore, the second cam can be rotated in a state where the lock mechanism is reliably moved to the allowable position.

An embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a perspective view of an electric lock device according to this embodiment, and this electric lock device houses a motor M as a drive source in a casing C having a U-shaped cross section. The motor M in this embodiment is an ultrasonic motor capable of normal rotation and reverse rotation. However, the normal rotation referred to in this embodiment means rotation of the motor M in the direction of locking the electric lock device, and reverse rotation. The term “rotates the motor M in the direction to unlock the electric lock device”.
The motor M is fixed to the casing C as follows.
As shown in FIG. 2, the motor fixing bracket 1 has a U-shaped cross section, and includes a flat surface 1a and side surfaces 1b bent at right angles from both ends of the flat surface 1a. 1c is provided through.
The flat surface 1a covers the upper surface of the motor M, and the motor fixing bracket 1 is fixed with screws N in a state where the output shaft M1 of the motor M which is the drive shaft of the present invention penetrates the hole 1c. When the motor fixing bracket 1 is fixed to the motor M in this way, the side surface 1b of the motor fixing bracket 1 is fixed to the side surface of the casing C with a screw (see FIG. 1).

A cam mechanism is connected to the output shaft M1 of the motor M fixed to the casing C as described above as follows.
That is, as shown in FIGS. 2-4, the 1st cam 2 is connected with the front-end | tip of the output shaft M1 so that this output shaft M1 can rotate integrally. The first cam 2 is formed by integrally connecting a circular boss 2a and a semicircular cam plate 2b having a diameter larger than that of the boss 2a, and a washer as a sliding material below the cam plate 2b. 2c is provided.

Further, the second cam 4 is connected to the output shaft M1 via the bush 3 so as to be rotatable with respect to the output shaft M1. As is apparent from FIG. 3, the second cam 4 includes a protrusion 4a having a length substantially the same as the diameter of the cam plate 2b of the first cam 2 (portion indicated by reference numeral 2d in the drawing). A pin-like rotation driving portion 4b is vertically projected from the vicinity of the tip of the protruding portion 4a toward the first cam 2 side. And when the said 1st cam 2 rotates, the dimensional relationship in which the 1st cam 2 contact | abuts to the said rotational drive part 4b is maintained. In other words, the second cam 4 protrudes the rotation drive unit 4 b into the rotation locus of the first cam 2.
As shown in FIG. 3, the first cam 2 includes a pair of transmission portions 2d and 2d. The transmission portions 2d and 2d are provided when the first cam 2 rotates in the x direction or the y direction. The first cam 2 and the rotation drive unit 4b are in contact with each other.

As described above, in the cam mechanism including the first cam 2 and the second cam 4, when the motor M is driven and the output shaft M1 rotates, the first cam 2 rotates together with the output shaft M1. At this time, since the second cam 4 is rotatable with respect to the output shaft M1, the second cam 4 does not rotate with the output shaft M1. However, when the first cam 2 rotates, the transmission portion 2d of the first cam 2 comes into contact with the rotation drive portion 4b of the second cam 4, so that the rotational force of the first cam 2 causes the transmission portion 2d and the rotation drive portion 4b to move. To the second cam 4 and the first cam 2 and the second cam 4 rotate integrally.
In the first cam 2, the semicircular outer peripheral surface located between the pair of transmission portions 2d, 2d is used as the lock mechanism retracting portion 2e, and the lock mechanism retracting portion 2e will be described later.

And the locking mechanism R of this invention is assembled | attached to the flat surface 1a of the motor fixing metal fitting 1 which fixes the motor M. FIG. As shown in FIG. 5, the lock mechanism R includes a slide member 5, a clamping member 6, a fixing pin 7, and a spring S.
The slide member 5 is an L-shaped member that includes a slide plate 5a and a standing wall 5b that protrudes perpendicularly from one end of the slide plate 5a and rises vertically from the surface of the slide plate 5a. The slide plate 5a is formed with a long hole 5c extending from the vicinity of the center thereof to the standing wall 5b, and a lock portion 5d having a notch is provided at the tip of the slide plate 5a.

Further, the holding member 6 is placed on the slide plate 5a, and the slide plate 5a is positioned between the holding member 6 and the flat surface 1a of the motor fixing bracket 1. The fixing pins 7 and 7 are passed through the elongated hole 5 c, and both ends of the fixing pins 7 and 7 are fixed to the clamping member 6 and the flat surface 1 a of the motor fixing bracket 1. Accordingly, the fixing pins 7 and 7 serve as a guide, and the slide plate 5a (slide member 5) slides along the long hole 5c.
A spring S is interposed between one fixing pin 7 (the left fixing pin 7 in the figure) and the upright wall 5b of the sliding member 5, and the sliding member 5 is usually pulled to the left in FIG. It has been. Then, the slide member 5 pulled by the spring force of the spring S comes to rest with the tip of the slide plate 5a (lock portion 5d) in contact with the inner wall surface C1 of the casing C (see FIG. 1).

On the other hand, when the motor M is driven from the above state and the output shaft M1 and the first cam 2 are rotated in the x direction in the drawing, the outer peripheral surface of the first cam 2, that is, the lock mechanism retracting portion 2e is brought into the upright wall 5b. Abut. The lock mechanism retracting portion 2e retracts the standing wall 5b in the z direction against the spring force of the spring S by the driving force of the motor M, and the lock mechanism retracting portion 2e retracts the standing wall 5b. The first cam 2 continues to rotate while maintaining the above. In other words, during the rotation of the first cam 2, the slide member 5 holds the position moved in the z direction while the lock mechanism retracting portion 2e and the upright wall 5b abut.
When the first cam 2 further rotates and the lock mechanism retracting portion 2e is separated from the standing wall 5b, the slide member 5 is again stopped at the position shown in the figure by the spring force of the spring S.
As described above, the rotation mechanism of the motor M and the first cam 2 is converted into the sliding movement of the lock mechanism R by connecting the lock mechanism R to the first cam 2.

The lock mechanism R having the above configuration is fixed to the motor fixing bracket 1 and accommodated in the casing C. The key member A is positioned so as to close the opening of the casing C.
As shown in FIG. 1, the key member A includes a sliding member 8 and a rod 9 that protrudes and is fixed to the sliding member 8. The sliding member 8 is a U-shaped member having a plane 8a and side surfaces 8b and 8b protruding at right angles from both ends of the plane 8a. The side surfaces 8b and 8b are a pair of the casing C. The dimensional relationship stored between the inner wall surfaces C1 and C1 with a slight gap is maintained.

The side surface of the casing C is provided with elongated sliding holes 10, 10, and a plurality of sliding pins 11 are passed through the sliding holes 10, 10, and one end thereof is a side surface 8 b of the sliding member 8. , 8b. Therefore, the sliding pin 11 serves as a guide, and the sliding member 8 can slide along the sliding holes 10 and 10.
In addition, a connecting hole 12 having a length in a direction perpendicular to the sliding direction is formed in the flat surface 8a of the sliding member 8, and the rotation driving portion 4b of the second cam 4 is provided in the connecting hole 12. It penetrates.
As shown in FIG. 6, a locking recess 13 is formed on the lower surface of one side surface 8 b of the sliding member 8 by cutting out a part thereof.

Reference numeral 14 in FIG. 1 denotes a switch member that detects the position of the lock mechanism R and transmits a detection result to a controller (not shown). Although not shown, the switch member 14 is also provided at the front and rear end sides in the sliding direction of the key member A so that the position of the key member A is also detected.
The controller drives the motor M based on the detection result transmitted from the switch member 14.

Next, the operation of the electric lock device in this embodiment will be described.
In this electric lock device, the rod 9 is protruded from the casing C, and the tip of the protruded rod 9 is inserted into a key holder or the like to perform locking. Therefore, as shown in FIGS. 7 and 8, the state in which the rod 9 is housed in the casing C means an unlocked state.

In the unlocked state shown in FIGS. 7 and 8, the lock portion 5d formed at the tip of the slide plate 5a of the lock mechanism R is located on the tip side in the sliding direction of the sliding member 8 (left side in FIG. 7). . That is, as is clear from FIG. 8, the lock portion 5d protrudes on the sliding locus of the one side surface 8b of the sliding member 8. Therefore, even if vibration, impact, or the like is applied, the sliding member 8 does not protrude in the locking direction (left direction in FIG. 7) by the lock portion 5d. In other words, the movement of the key member A is suppressed by the lock mechanism R.
The above position of the lock mechanism R, that is, the position where the lock portion 5d is on the sliding locus of the one side surface 8b is referred to as a lock position of the lock mechanism R, and the lock portion 5d slides on the side surface 8b. The position retracted from the locus is called the allowable position of the lock mechanism R.

7 and 8, when a lock signal is input to a controller (not shown), the controller controls the motor M to be driven. At this time, the switch member 14 detects that the lock mechanism R is in the restrained position and the key member A is in the unlocked position. Based on this detection signal, the controller drives the motor M to turn the output shaft M1. Turn forward.
As shown in FIGS. 9 and 10, when the output shaft M1 rotates forward in the x direction, the transmission portion 2d of the first cam 2 and the lock mechanism retracting portion 2e come into contact with the upright wall 5b of the lock mechanism R to stand up. The wall 5b, that is, the lock mechanism R is retracted while sliding in the z direction. Therefore, the lock portion 5d retracts from the sliding locus of the one side surface 8b of the sliding member 8, in other words, the lock mechanism R moves to the allowable position, and the lock of the key member A is released.

However, as described above, since the second cam 4 is freely connected to the output shaft M1, the second cam 4 does not rotate even when the output shaft M1 rotates to reach the state shown in FIG. The rotation drive unit 4b holds a stationary state at the illustrated position.
When the first cam 2 continues to rotate, one of the transmission portions 2d of the first cam 2 comes into contact with the rotation drive portion 4b of the second cam 4 located on the rotation locus, and the transmission portion 2d. Rotates the rotation drive unit 4b in the x direction.
At this time, since the lock mechanism R is moved to the allowable position and the lock is released as described above, as shown in FIG. 11, the rotation drive unit 4b passes through the connecting hole 12 formed in the sliding member 8. While sliding, the sliding member 8 is slid in the left direction in the figure.

When the first cam 2 further rotates from the state of FIG. 11, the lock mechanism retracting portion 2e of the first cam 2 moves away from the standing wall 5b as shown in FIG. As described above, when the lock mechanism retracting portion 2e is separated from the standing wall 5b, the lock mechanism R is moved upward in the figure by the spring force of the spring S. Then, the tip of the lock portion 5d of the lock mechanism R comes into contact with the inner wall surface of one side surface 8b of the sliding member 8. Then, when the sliding member 8 moves in the left direction in the drawing while the tip of the lock portion 5d is in contact with the inner wall surface of the side surface 8b, the lock portion 5d enters the locking recess 13 and the lock mechanism R is again turned on. It will be located at the restraining position.
At this time, the rod 9 sufficiently protrudes from the casing C and enters a key holder (not shown) to be locked. Therefore, even in the locked state of the key member A, the lock mechanism R is moved to the restraining position and locked so that the key member A does not move.

When unlocking from the locked state shown in FIG. 12, the switch member 14 detects that the lock mechanism R is in the restraining position and that the key member A is in the locked position, and the detection signal Based on the above, a controller (not shown) controls the motor M to reverse.
When the motor M rotates in the reverse direction, the first cam 2 rotates in the y direction in FIG. 12, and the lock mechanism retracting portion 2e of the first cam 2 comes into contact with the upright wall 5b of the lock mechanism R to lock the lock mechanism R. Is released.

Thus, even when the lock mechanism R is moved from the restraining position to the permissible position, the second cam 4 is stationary at the illustrated position, and the key member A still holds the locked state.
When the first cam 2 further rotates, the other transmission portion 2d comes into contact with the rotation drive portion 4b of the second cam 4, and the second transmission portion 2d and the rotation drive portion 4b of the second cam 4 are connected to the second drive portion 2b. The cam 4 rotates in the y direction in the drawing together with the first cam 2.
At this time, as described above, since the lock mechanism R has moved to the allowable position, in other words, since the lock of the key member A is released, the rotation drive unit 4b slides in the connection hole 12. However, the sliding member 8, that is, the key member A is moved to the unlocking position in the right direction in the figure (see FIG. 7).

Thus, according to the electric lock device of this embodiment, the lock mechanism R and the key member A can be operated by shifting the timing only by the motor M. Therefore, it is not necessary to newly provide a drive source different from the motor M in order to operate the lock mechanism R. Therefore, the entire electric lock device can be reduced in size, and the first cam 2 and the second cam 4 are provided coaxially, so that the space in the width direction of the device can be further reduced.
Thus, since the whole electric lock apparatus can be reduced in size, the said apparatus can be reliably installed also in the place where space, such as a window frame, was restricted.
Further, since one motor M may be driven when locking or unlocking, energy consumption can be reduced and energy saving can be realized as compared with the prior art.

Furthermore, according to this electric lock device, since the key member A is moved after the lock mechanism R is moved to the permissible position, the locking recess formed on the lock portion 5d of the slide member 5 and the side surface 8b of the slide member 8. 13 is not touched and damaged, or the smooth movement of the sliding member 8 is not hindered.
Further, since the lock mechanism retracting portion 2e is provided between the pair of transmission portions 2d, the lock mechanism R can be reliably moved to the allowable position before the transmission portion 2d contacts the rotation driving portion 4b.
Therefore, the second cam 4 can be rotated while the lock mechanism is reliably moved to the allowable position.

In the above embodiment, the cam mechanism is directly connected to the output shaft M1 of the motor M. However, the speed reducer is connected to the output shaft M1, and the cam mechanism is connected via the speed reducer. It doesn't matter. In this case, the output shaft of the reduction gear constitutes the drive shaft referred to in the present invention.
Further, in the above embodiment, the operation timings of the key member A and the lock mechanism R are made different. That is, regardless of whether the key member A moves to either the locked position or the unlocked position, the lock mechanism R always operates and then the key member A operates. In other words, when the motor M is driven, the lock member R is always activated before the key member A is activated.

However, the operation timings of the key member A and the lock mechanism R do not necessarily have to be different, and they may be operated at the same time. However, if the operation timing of the lock mechanism R is made earlier than the operation timing of the key member A, there is a low risk that they will come into contact with each other and damage, and dimension management can be facilitated.
Furthermore, in the said embodiment, although the key member A and the lock mechanism R moved linearly, locking / unlocking and locking of the key member A were performed, these movements are not restricted to the said embodiment. . For example, a further cam mechanism may be connected to the first cam 2 or the second cam 4, and either one or both of the key member A and the lock mechanism R may move so as to draw an arcuate locus.
In any case, it suffices if the first cam 2 is directly connected to the motor M and the second cam 4 is rotated by the rotational force of the first cam 2.

It is a perspective view of an electric lock device. It is sectional drawing of the state which connected the cam mechanism to the motor. It is an overhead view of the state which connected the cam mechanism to the motor. It is a perspective view of the state which connected the cam mechanism to the motor. It is a perspective view in the state where a lock mechanism was attached to a cam mechanism. It is a perspective view of a sliding member. It is a top view of an electric lock device. It is a front view of an electric lock device. It is a figure which shows an internal structure. It is another figure which shows an internal structure. It is a top view which shows a locking progress state. It is a top view which shows a locked state.

Explanation of symbols

A Key member M Motor M1 Motor output shaft R Lock mechanism 2 First cam 2d Transmission section 2e Lock mechanism retracting section 4 Second cam 4b Rotation drive section

Claims (3)

  A motor, a first cam connected to the drive shaft of the motor so as to be integrally rotatable, a second cam rotatably connected to the drive shaft of the motor, and rotated by the rotational force of the first cam; A key member that is connected to the two cams and moves to the locking position or the unlocking position according to the rotation direction of the second cam; and the key member that is connected to the first cam and that rotates with the first cam. A locking mechanism that moves to a restraining position that inhibits movement or an allowable position that allows movement of the key member, and when the motor is driven, the first cam rotates together with the motor to bring the locking mechanism to the allowable position. When the key member is moved to the locking position or the unlocking position via the second cam and the key member is positioned at the locking position or the unlocking position, the lock mechanism is moved to the restraining position. Electric lock device a configuration for suppressing the movement of the member.   2. The structure according to claim 1, wherein after the first cam rotates to move the lock mechanism to an allowable position, the first cam rotates the second cam to move the key member to the locked position or the unlocked position. Electric lock device.   The first cam includes a pair of transmission units and a lock mechanism retracting unit provided between the pair of transmission units, while the second cam includes a rotation driving unit located within the rotation locus of the transmission unit. When the first cam is rotated, the transmission mechanism is configured to rotate the second cam by contacting the rotation driving unit in a state where the lock mechanism retracting unit moves the lock mechanism to an allowable position. The electric lock device according to claim 1 or 2.

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