JP2008266929A - Electric lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To heighten the reliability of a lock and lock prevention performance in unlocking when a shock or the like is received. <P>SOLUTION: This electric lock 1 includes: a lock member 3 engaged with a striker 2; a stopper part 4 engaged with the lock member; a link part 5 integrally turned with the stopper part; a plunger 8 of an electromagnetic solenoid 7 engaged with one end of the link part; and a counterweight 9 engaged with the other end of the link part 5, wherein the center of gravity of a member 6 including a stopper part 4 and a link part 5 is aligned with the center 10a of rotation. The stopper part 4 and the link part 5 are formed separately. The moment of a plunger 8 to the center 10a of rotation and the moment of the counterweight 9 are set constant regardless of the rotating position of the link part 5. The respective engagement parts 24, 25 of the plunger 8 and the counterweight 9 are engaged with the respective guide parts 22 at one end and the other end of the link part 5 to freely slide in the longitudinal direction of the link part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electric lock that is prevented from being unlocked inadvertently due to the inertia of a solenoid plunger when an impact or the like is applied.

  FIG. 7 shows one form of a conventional electric lock (see Patent Document 1).

  This electric lock 81 is applied to a safe, a rocker, etc., and a vertical electromagnetic solenoid 83 for projecting a plunger 82 upward, a locking rod 84 provided at the tip of the plunger 82, and an engagement engagement of the locking rod 84 One end is supported by the engagement hole 85 at the upper part of the door 90 to be moved and the horizontal long hole 85 of the plunger 82, the middle is maintained by the shaft part 86 so as to be rotatable in the vertical direction, and the weight part 87 is provided at the other end. The offset lever 88 is provided. In FIG. 7, reference numeral 89 is a limit switch that detects the movement of the plunger 84.

  For example, when a person who attempts to steal the stored items by applying a strong shock to the electric lock 81 and opening the door 90 by retreating the plunger 82 of the solenoid 83 against the internal spring force, In addition, the weight 87 receives an inertial force together with its own weight and rotates downward to prevent the plunger 82 from retreating (lowering), thereby preventing theft.

  FIG. 8 shows another form of a conventional electric lock (see Patent Document 2).

  This electric lock 91 is applied to a rear door or the like of a lorry, and an electromagnetic solenoid 92 is disposed horizontally, and a locking stopper that engages a plunger 93 of the solenoid 92 and an engagement hook 95 of an opening / closing handle 94. The member 96 is connected by a lever 97, and the moment of inertia of the plunger 93 and the stopper member 96 is substantially equal to the intermediate fulcrum 98 of the lever 97. In FIG. 7, reference numeral 98 is a spring member, and 99 is a lock rod for opening and closing the door.

For example, when strong vibration is applied to the electric lock 91 while the vehicle is running, the moment of inertia of the stopper member 96 and the plunger 93 is canceled, and the lever 97 does not receive a rotational force around the fulcrum 98. Lock release is prevented.
Japanese Utility Model Publication No. 7-12567 (FIG. 3) Japanese Utility Model Publication No. 2-103474 (Fig. 1)

However, in the conventional electric lock 81 of FIG. 7, the weight 87 rotates with a constant radius around the shaft portion 86 of the lever 88, and therefore, in the explanatory diagrams of FIGS. 9 (a) and 9 (b). As shown, the span of the lever 88 relative to the direction of impact changes (r ₂ becomes r ₂ cos θ) depending on the rotation position of the lever 88 in FIG. 9B, and the moment between the plunger 82 and the weight 87 is changed. (M ₁ × r ₁ > m ₂ × r ₂ cos θ), and there is a concern that the lock (locking) can be completely ensured upon impact. On the other hand, there was a concern that an unexpected lock could be caused by an impact at the time of unlocking, and that it was necessary to re-unlock.

  In the conventional electric lock shown in FIG. 8, the stopper member 96 easily comes into contact with the engagement hook 95 with a large frictional force. There is a concern that the security of (locking) is reduced, or the electromagnetic solenoid 92 must be enlarged to strengthen the locking and unlocking force. Further, when the lever 97 rotates around the shaft portion 98 as in the electric lock 81 of FIG. 7, the span of the upper half of the lever 97 on the stopper member 96 side and the lever 97 on the plunger 93 side is below. There is a concern that when there is a difference with the span of the half, it is possible to completely guarantee the lock (locking) at the time of impact.

  In view of the above points, the present invention provides an electric lock that can enhance the reliability of locking (locking) when subjected to an impact or the like, and can reliably prevent unexpected locking during unlocking. With the goal.

  In order to achieve the above object, an electric lock according to a first aspect of the present invention comprises a lock member that engages with a striker on the other side, a stopper portion that engages with the lock member, and a rotation that is integrated with the stopper portion. A center of gravity of a member comprising the stopper portion and the link portion, the link portion moving, a plunger of an electromagnetic solenoid engaged with one end of the link portion, and a counterweight engaged with the other end of the link portion And the center of rotation coincide with each other.

  With the above configuration, the center of gravity of the member composed of the stopper portion and the link portion coincides with the rotation center of the member, so that a rotational force (moment) is generated in the member with respect to an impact in any direction (360 °). There is nothing. As a result, the moment of the plunger and the moment of the counterweight with the rotation center of the member as a fulcrum can be made to coincide with each other, and the inertia of the plunger with respect to the impact from the outside is surely offset. The stopper portion locks the lock member, the link portion integrally rotates the stopper member in the locking or unlocking direction, and the electromagnetic solenoid rotates the link member in the locking or unlocking direction.

  The electric lock according to a second aspect is the electric lock according to the first aspect, wherein the stopper portion and the link portion are formed separately.

  With the above-described configuration, only the link portion is rotated by the operation of the solenoid, and the stopper portion is brought into contact with the lock member in the locked state, so that a lock preparation state corresponding to auto-locking can be obtained. When the stopper is rotated in the locking direction, the stopper is brought into contact with the link. When the solenoid is rotated in the locking direction, the stopper is moved toward the locking member by the spring biasing force. To rotate.

  The electric lock according to claim 3 is the electric lock according to claim 1 or 2, wherein the moment of the plunger and the moment of the counterweight with respect to the rotation center are constant irrespective of the rotation position of the link portion. It is characterized by that.

  With the above configuration, the plunger and the counter are in the position where the link portion stops regardless of the rotation position of the link portion (more precisely, the member composed of the link portion and the stopper portion, or the link portion separate from the stopper portion). Since each moment with the weight is always the same, unlocking against shock and unexpected locking are reliably prevented. For example, even if an impact is applied in an unlocked state in which the link portion and the stopper portion are integrally rotated clockwise by the pulling of the plunger and the stopper portion is detached from the lock member, the unexpected lock is surely prevented. In addition, the plunger and the stopper are rotated together counterclockwise by pushing the plunger (if the link and stopper are separate, the link is rotated and the stopper is rotated by the spring biasing force). ), Even when an impact is applied in the locked state where the stopper portion is engaged with the lock member, the unexpected lock release is surely prevented.

  An electric lock according to a fourth aspect is the electric lock according to any one of the first to third aspects, wherein each engaging portion of the plunger and the counterweight is provided in each guide portion of one end and the other end of the link portion. Is slidably engaged in the longitudinal direction of the link portion.

  With the above configuration, when the link portion is rotated by being driven by the solenoid, the engaging portion of the plunger and the counterweight slides along the guide portion at each end of the link portion. Always move in parallel, the distance (vertical distance or horizontal distance) from the rotation center of the link part to each engaging part is always constant, and the moments of the plunger and the counterweight are always constant. Therefore, the moments of the plunger and the counterweight are always the same at the position where the link portion stops regardless of the rotation position of the link portion. A long hole or a long hole-like notch hole is suitable as the guide part, and a cylindrical pin part is suitable as the engaging part.

  According to the first aspect of the present invention, since the center of gravity of the member composed of the stopper portion and the link portion coincides with the rotation center of the member, the moment of the plunger with the rotation center of the member as a fulcrum and the counterweight The moment and the moment can be accurately matched, so that the inertia of the plunger with respect to the impact from the outside can be surely offset, and the reliability of the lock with respect to the impact can be increased. This reliably avoids the risk of unlocking due to theft or earthquake. Similarly, it is possible to improve the reliability of preventing an unexpected lock at the time of unlocking against an impact.

  According to invention of Claim 2, it becomes applicable also to an auto-lock by rotating a link part and a stopper part independently, and the use range of an electric lock diversifies. In such various types of usage, the reliability of lock release prevention and lock prevention against impact can be enhanced.

  According to the third aspect of the present invention, it is possible to improve the reliability of lock release prevention and lock prevention regardless of the rotation position of the link portion. Thereby, the attachment initial position of the rotation direction of a link part can be set as desired, and the freedom degree of design expands.

  According to the fourth aspect of the present invention, it is possible to improve the reliability of lock release prevention and lock prevention regardless of the rotational position of the link portion. Thereby, the attachment initial position of the rotation direction of a link part can be set as desired, and the freedom degree of design expands.

  1 to 5 show an embodiment of an electric lock according to the present invention. The electric lock 1 is miniaturized, and is suitable for a rocker, a desk drawer, a small safe or the like.

  As shown in FIG. 1, the electric lock 1 includes a rotatable lock plate (lock member) 3 that engages with a striker 2 such as a door or a drawer, a stopper portion 4 and a link portion 5 for the lock plate 3. A movable plate member (member) 6, a plunger (iron core or rod) 8 of a horizontal electromagnetic solenoid 7 engaged with the upper end side of the link portion 5, and a horizontal circle engaged with the lower end side of the link portion 5 A column-shaped counterweight 9, the center of gravity of the plate member 6 and the center (rotation center) of the rotation shaft 10 coincide, the weights of the plunger 8 and the counterweight 9 are the same, and when the plate member 6 is rotated, The span from the rotation center to the plunger 8 and the span from the rotation center to the counterweight 9 are always the same.

  In the embodiment of FIG. 1, an example is shown in which the stopper portion 4 and the link portion 5 are configured by separate stopper plates (or stopper levers) (4) and link plates (or link levers) (5). It is also possible to integrally form the stopper portion 4 and the link portion 5 with a metal plate.

  If a separate stopper plate (4) is used as shown in FIG. 1, it is locked (locked) even when the door or the like is opened (the striker 2 is spaced apart from the lock plate 3) in response to auto-locking. be able to. As shown in FIG. 3 from the state of FIG. 1, for example, the solenoid 7 is turned on to cause the plunger 8 to protrude forward by the force of the compression coil spring 42, and the link plate (5) is rotated counterclockwise together with the plunger 8. At this time, the stopper plate (4) rotates counterclockwise by the urging force of the torsion spring 30 and comes into contact with the arc-shaped convex portion 38 on the rear side of the lock plate 3 to obtain a lock ready state.

  As shown in FIG. 2, the striker 2 on the other side is formed in a substantially U shape, and can move forward and backward in the recess 12 of the case 11 of the electric lock 1. In FIG. 1, the door or the like is open. The lock plate 3 is supported by the case 11 so as to be pivotable in the vertical direction at the shaft portion 13 and is urged in the locking and unlocking directions by the snap spring 14 (FIG. 4) to maintain the unlocked state in FIG. Yes.

  The lock plate 3 has a short convex part 15 and a long convex part 16 on the tip side, a concave part 17 between both convex parts 15 and 16, and a concave part 18 behind the long convex part 16 in FIG. The striker 2 hits the long convex portion 16, and when the door or the like of FIG. 4 is closed, the lock plate 3 rotates clockwise to hold the striker 2 with the short convex portion 15, and the rear concave portion 18 at the time of locking shown in FIG. The tip end portion 19 of the stopper portion 4 is engaged with.

  As shown in FIG. 1, the plate member 6 is composed of a link portion 5 in the vertical (vertical) direction and a stopper portion 4 obliquely intersecting the link portion 5, and an upper projecting portion 20 and a lower projecting portion 21 of the link portion 5. Are provided with notches (guide portions) 22 and 23 each having a long hole shape in the vertical direction.

  A cylindrical horizontal pin portion (engagement portion) 24 is provided orthogonal to the front portion of the plunger 8 of the solenoid 7, and the pin portion 24 is slidably engaged with the upper cutout hole 22. In addition, a cylindrical horizontal pin portion (engagement portion) 25 is provided orthogonal to the first half of the counterweight 9, and the pin portion 25 is slidably engaged with the lower cutout hole 23. The pin portions 24 and 25 project at right angles from the axis of the plunger 8 and the counterweight 9. In this example, the vertical distance (span) from the center of the shaft portion 10 to the centers of the pin portions 24 and 25 is set equal.

  The stopper portion 4 has a front portion 26 that protrudes obliquely upward from the link portion 5 and a tip portion 19 that protrudes downward from the front portion 26. When the stopper portion 4 is formed separately from the link portion 5, the rear portion 27 protruding obliquely rearward and downward from the link portion 5 and the plate-like portion 28 protruding upward from the rear portion 27 are provided as stopper portions. (Stopper plate) 4 is provided, and a rearward projecting portion 29 for contacting the plate-like portion 28 from above is provided on the link portion (link plate) 5. The stopper portion 4 is urged counterclockwise by the torsion spring 30, and the link portion 5 is also urged integrally. The torsion spring 30 has one end 30 a locked to the stopper portion (stopper plate) 4, the other end 30 b locked to the plate-like portion 28 on the rear end side of the link portion (link plate) 5, and the winding portion 30 c It is located on the outer peripheral side of the shaft part 10. The force of the spring 30 is weaker than the force of the compression coil spring 42 on the solenoid 7 side. The locked state depends on the force relationship between the spring 30 and the spring 42.

  The center of gravity of the plate member 6 integrated by the stopper portion 4 and the link portion 5 coincides with the center of the shaft portion 10. Further, the center of gravity of the separate stopper plate (4) coincides with the center of the shaft portion 10, and the center of gravity of the link plate (5) coincides with the center of the shaft portion 10. These centroids are obtained by CAD at the design stage.

  In the case of the integral plate member 6, the protrusion 29 on the rear side of the link plate (5) and the protrusions 27 and 28 of the stopper plate (4) are unnecessary, but in order to make the center of gravity coincide with the axis, these portions 27 to 29 may be integrally formed. The rear projecting portion 27 is useful for detecting the rotational position with the limit switch 31, and the projecting plate portion 28 is useful for projecting outside as shown in FIG.

  Since the center of gravity of the plate member 6, the stopper plate (4), and the link plate (5) coincides with the center of the shaft portion 10, these members 6, (4) can be applied even if an impact is applied from all directions of 360 °. , (5) does not generate a rotational force (moment), so that the inertial force in the impact direction between the upper plunger 8 and the lower counterweight 9 accurately matches, and the unlocking prevention performance is enhanced. . Further, since the moments around the support shaft of the plunger 8 and the counterweight 9 may be set to be the same, the design and manufacture are easy.

  The electromagnetic solenoid 7 of this example is small and light, but the plunger return spring 42 is used to ensure the protruding operation of the plunger 8. The plunger 8 can be advanced and retracted by the magnetic field and reverse magnetic field of an internal coil (not shown) without using the spring 42.

  The cylindrical body portion 32 of the electromagnetic solenoid 7 is fixed horizontally to the case 11, and the plunger 8 moves back and forth horizontally. Plunger 8 and counterweight 9 are arranged in parallel. The counterweight 9 of this example is the same size and shape as the plunger 8 and has the same weight, that is, the same moment around the support shaft. The counterweight 9 receives an impact in the same direction as the plunger 8. The impact is when the rocker or the drawer is strongly struck or dropped for the purpose of taking a thing or the like, or when strong vibration is given by an earthquake or the like.

  In FIG. 1, the vertical distance from the center of the shaft portion 10 to the center of the pin 24 of the plunger 8 and the vertical distance from the center of the pin 25 of the counterweight 9 are set to be the same. The centers of the pins 24 and 25 coincide with the axis of the plunger 8 and the axis of the counterweight 9. The moment of the plunger 8 at the time of impact, that is, the product of the vertical distance from the axis and the mass of the plunger 8 is equal to the moment of the counterweight 9, that is, the vertical distance from the axis and the mass of the counterweight 9.

  It should be noted that the vertical distance between the upper and lower sides and the masses of the members 8 and 9 are not necessarily matched, and it is only necessary that the moments of the plunger 8 and the counterweight 9 are matched. Therefore, for example, when the mass of the counterweight 9 is twice that of the plunger 8, the vertical distance from the shaft center to the counterweight 9 may be ½ of the vertical distance to the plunger. Even in this case, the lower half portion 21 of the link portion 5 and the link plate (5) is formed wider than the upper half portion 20 so that the center of gravity of the link portion 5 and the link plate (5) coincides with the axial center.

  As shown in FIG. 2, the counterweight 9 is guided by the guide portion 33 on the case 11 side so as to always advance and retract horizontally. The guide portion 33 is configured by providing a pair of front and rear wall portions 34 with horizontal hole portions 35, and the latter half portion of the counterweight 9 enters each hole portion 35 so that it can slide smoothly.

  The frictional resistance (coefficient) between the counterweight 9 and the guide portion 33 is preferably set equal to the frictional resistance (coefficient) of the plunger 8 (FIG. 1) in the cylinder 32 of the solenoid 7, and is at least an approximate value. Is set as follows. This is because if the frictional resistances of the two are different, there is a difference in the moment between the plunger 8 and the counterweight 9 at the time of impact.

  In FIG. 2, reference numeral 10 denotes a shaft portion of the plate member 6, and 13 denotes a shaft portion of the lock plate 3. The guide portion 33 is integrally formed with a cover (holder) portion 36 of the case 11, and the lock plate 3, the plate member 6, and the like are covered with the cover portion 36 and accommodated in the case 11.

  FIG. 4 shows a state in which the door or the like is closed and the striker 2 rotates the lock plate 3 clockwise to engage the lock plate 3, and the solenoid 7 is not yet operated, and the tip 19 of the stopper portion 4. Are spaced above the lock plate 3.

  When the rear end of the lock plate 3 turns on the limit switch 37, the solenoid 7 is actuated as shown in FIG. 5, the plunger 8 moves forward (protrudes), and the plate member 6 is rotated counterclockwise to stop the stopper. The protrusion 19 at the tip of the portion 4 enters and engages the recess 18 of the lock plate 3, and the protrusion 38 on the rear side of the recess 18 abuts the protrusion 19, thereby unlocking the lock plate 3 (counterclockwise). Rotation) is prevented. The rear lower surface 39 of the lock plate 3 contacts the inclined surface 40 of the case 11. The stopper portion 4 is elastically biased counterclockwise (lock direction) by a spring 30. Even when the energization of the solenoid 7 is released, the locked state is maintained by the urging force of the spring 42 and the spring 30. In the integrated plate member 6, for example, one end 30a of the torsion winding spring 30 can be locked to the case 11 side, or another spring (not shown) such as a compression coil spring can be used.

  When the stopper portion 4 is a stopper plate (4) separate from the link portion 5, the link plate (5) and the stopper plate (in FIG. 4) and the rear protrusions 28 and 29 abut against each other by the force of the spring 30, and the stopper plate (4) is rotated counterclockwise (locking direction) by the force of the spring 30 to cause the protrusion at the tip. 19 engages with the lock plate 3.

  As shown in FIG. 5, simultaneously with the force of the coil spring 42, the plunger 8 moves forward horizontally, and at the same time, the counterweight 9 moves back in parallel (horizontally). The pin portion 24 of the plunger 8 slides along the upper notch hole 22 of the link portion 5 and is positioned at the upper portion of the notch hole 22. At the same time, the pin portion 25 of the counterweight 9 is notched on the lower portion of the link portion 5. Slide along hole 23. Each pin 24, 25 is engaged with each notch hole 22, 23 without backlash.

  By the notches 22 and 23 and the pins 24 and 25, a vertical distance from the center of the shaft portion 10 to the axis of the plunger 8 and a vertical distance from the center of the shaft portion 10 to the shaft center of the counterweight 9 are set. It is always unchanged.

As shown in FIGS. 6A and 6B, the moment of the plunger 8, that is, the vertical distance r from the center 10a of the shaft 10 (axial center or rotation center) to the shaft 8 of the plunger 8 (center of the pin 24). ₁ and the mass of the plunger 8 are always constant regardless of the rotation position of the link portion 5, and the moment of the counterweight 9, that is, the center (axial center or rotation center) 10a of the shaft portion 10 is countered. The product of the vertical distance r ₂ to the axis of the weight 9 (the center of the pin portion 25) and the mass of the counterweight 9 is always constant and equal regardless of the rotational position of the link portion 5, and both members 8 and 9 This moment is always constant and equal regardless of the rotational position of the link portion 5. Symbol F indicates the direction of impact. The shaft center 10a is not only the link portion 5 but also the rotation center of the stopper portion 4 (FIG. 1).

  With the above configuration, even when an impact is applied from the outside in the locked (locked) state of FIG. 5 and the plunger 8 tries to move backward (moves in the unlocking direction), the same moment as the plunger 8 is applied to the counterweight 9 in the same direction. In addition, the rotation of the link portion 5 in the clockwise direction (unlock direction) is prevented, and the backward movement of the plunger 8 is prevented. This action is made accurate by the fact that the center of gravity of the plate member 6 or the link plate (5) or the stopper plate (4) coincides with the center of the shaft portion 10.

  When the solenoid 7 is energized from the locked state of FIG. 5 and the plunger 8 is retracted (retracted), the link portion 5 and the stopper portion 4 are integrally rotated clockwise as shown in FIG. Advances horizontally, the tip 19 of the stopper 4 is detached from the lock plate 3, and the door and the like are opened as shown in FIG. When an impact is applied in the unlocked state of FIG. 1, an unexpected lock is reliably prevented by the same action as described above.

  In the above embodiment, the electric lock 1 is arranged so that the solenoid 7 and the counterweight 9 are horizontal. However, the electric lock 1 can be arranged vertically depending on, for example, a desk drawer. is there. Even in this case, the same effects as described above can be obtained. In the above embodiment, only the auto-locking configuration has been described, but it goes without saying that the solenoid 7 can be electrically operated by manual key operation to perform locking and unlocking.

It is a front view of the door opening state which shows the internal structure of one Embodiment of the electric lock which concerns on this invention. It is a perspective view of the door open state which similarly shows the external appearance of an electric lock. It is a front view of the lock preparation state at the time of door opening which shows the internal structure of an electric lock. It is a front view of the door closed state which shows the internal structure of an electric lock, and an unlocked state. It is a front view of the locked state which shows the internal structure of an electric lock. (A) (b) is explanatory drawing which shows operation | movement of the solenoid and counterweight of an electric lock. It is a front view which shows the principal part of one form of the conventional electric lock. It is a front view which shows the other form of the conventional electric lock. (A) (b) is explanatory drawing which shows operation | movement of the solenoid and counterweight in one form of the conventional electric lock.

Explanation of symbols

1 electric lock 2 striker 3 lock plate (locking member)
4 Stopper part 5 Link part 6 Plate member (member)
7 Electromagnetic solenoid 8 Plunger 9 Counterweight 10 Shaft portion 10a Center of rotation 22, 23 Notch hole (guide portion)
24, 25 Pin part (engagement part)

Claims (4)

  A lock member that engages with the striker on the other side, a stopper portion that engages with the lock member, a link portion that rotates integrally with the stopper portion, and a plunger of an electromagnetic solenoid that engages with one end of the link portion; An electric lock comprising: a counterweight engaged with the other end of the link portion; and a center of gravity and a rotation center of a member formed by the stopper portion and the link portion coincide with each other.   The electric lock according to claim 1, wherein the stopper portion and the link portion are formed separately.   The electric lock according to claim 1 or 2, wherein the moment of the plunger and the moment of the counterweight with respect to the rotation center are constant regardless of the rotation position of the link portion.   The engaging part of the said plunger and the said counterweight engaged with each guide part of the one end and the other end of the said link part so that sliding was possible in the link part longitudinal direction, Any one of Claims 1-3 characterized by the above-mentioned. The electric lock according to crab.

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