JP2024062495A - Electric locking/unlocking device and opening/closing device - Google Patents

Abstract

[Problem] Durability is further increased when an elastic member is interposed between an electromagnetic solenoid and a locking member to prevent damage to the electromagnetic solenoid. [Solution] An electric locking/unlocking device 1 includes a locking member 2 that locks a latch operating member 106, an electric drive unit 3 that switches the locking member 2 between a locked position and an unlocked position, and an elastic member 5 that is interposed between the locking member 2 and an output unit 3b of the electric drive unit 3. The elastic member 5 is configured to elastically deform when it receives a compressive force from the locking member 2 side toward the electric drive unit 3 side or a compressive force from the electric drive unit 3 side toward the locking member 2 side. [Selected Figure] Figure 2

Description

This disclosure relates to an electric locking/unlocking device and opening/closing device for a door.

For example, Patent Document 1 discloses an electric locking/unlocking device that operates an electric lock with an externally input electric signal to lock and unlock. In the electric locking/unlocking device of Patent Document 1, the locking member that locks the latch operating member is driven by an electromagnetic solenoid, and a tension spring is interposed between the electromagnetic solenoid and the locking member. By interposing the tension spring, even if a voltage is applied in a direction that causes the electromagnetic solenoid to move backward while the locking member is fixed in the locked position due to a certain factor, the tension spring allows the electromagnetic solenoid to move backward, thereby preventing damage to the electromagnetic solenoid.

Patent No. 6892482

However, since the electromagnetic solenoid performs instantaneous operation in response to the applied voltage, if a tension spring is interposed between the electromagnetic solenoid and the locking member as in Patent Document 1, a large force will be instantaneously applied to the tension spring.

Tension springs generally have hooks at both ends, and the tension spring of Patent Document 1 has a hook that hooks on the electromagnetic solenoid side and a hook that hooks on the locking member side. When the inventors observed in detail, they found that when the electromagnetic solenoid momentarily operated, the tension spring was only hooked by the hook and so swung easily, resulting in the hook rubbing against the member to which it was hooked. This level of rubbing does not cause any problems under normal use conditions, but in special cases where the electromagnetic solenoid is operated very frequently, it may lead to wear on the hook or breakage due to twisting of the tension spring, resulting in damage to the hook. In other words, tension springs may not be able to meet the demands for even higher durability.

This disclosure was made in consideration of these points, and its purpose is to further increase durability when an elastic member is interposed between the electromagnetic solenoid and the locking member to prevent damage to the electromagnetic solenoid.

In order to achieve the above object, in a first aspect of the present disclosure, an electric locking/unlocking device can be assumed to include a locking member that locks a latch operating member provided on a door, and an electric drive unit that switches the locking member between a locked position that locks the latch operating member and an unlocked position that unlocks the latch operating member. Between the locking member and an output unit of the electric drive unit, there is an elastic member that elastically deforms in response to a compressive force from the locking member side toward the electric drive unit side or a compressive force from the electric drive unit side toward the locking member side.

According to this configuration, when the electric drive unit advances the output unit, for example, the locking member is in the locked position and the latch operating member is locked. On the other hand, when the electric drive unit retracts the output unit, the locking member is in the unlocked position and the latch operating member is unlocked. Note that it is also possible to configure the electric drive unit to lock by retracting the output unit, and to unlock by advancing the output unit. The same applies below.

If we assume that a voltage is applied to the electric drive unit in a direction that causes the output part to move backwards while the locking member is fixed in the locked position, the elastic member will be subjected to a compressive force and will be elastically deformed. This allows the electric drive unit to move backwards, thus preventing damage to the electric drive unit.

In addition, when the locking member is switched from the locked position to the unlocked position, or from the unlocked position to the locked position, the elastic member elastically deforms when the electric drive unit operates instantaneously, mitigating the impact on each part. Furthermore, because the elastic member is a member that elastically deforms when subjected to a compressive force, there is no need for a structure in which a hook portion is hooked, as in conventional tension springs, and therefore the elastic member itself is less likely to break.

The elastic member according to the second aspect of the present disclosure may be a compression spring. In this case, one side of the compression spring in the elastic deformation direction may be positioned on the locking member side, and the other side of the compression spring in the elastic deformation direction may be positioned on the electric drive device side. This allows for a simple structure using a compression spring while preventing damage.

In a third aspect of the present disclosure, an output side connecting member that extends to reach one end side of the compression spring may be connected to the output section of the electric drive device. In this case, the output side connecting member may be provided with an output side abutment plate portion that extends along the end face of the one end side of the compression spring and abuts against the end face of the one end side. In addition, a lock side connecting member that extends to reach the other end side of the compression spring may be connected to the lock member. In this case, the lock side connecting member may be provided with a lock side abutment plate portion that extends along the end face of the other end side of the compression spring and abuts against the end face of the other end side.

With this configuration, the compression spring is disposed between the output side contact plate portion and the lock side contact plate portion. The output side contact plate portion contacts one end face of the compression spring, and the lock side contact plate portion contacts the other end face of the compression spring, so that a compressive force can be applied stably to the compression spring. In addition, the compressive force is distributed over a wide area of each end face of the compression spring, so that the occurrence of localized concentrated loads can be suppressed.

The output side connecting member according to the fourth aspect of the present disclosure may have an output side guide portion that extends along the outer circumferential surface of the compression spring until it reaches one end side of the compression spring, and the output side contact plate portion may be provided on the output side guide portion. Also, the lock side connecting member may have a lock side guide portion that extends along the outer circumferential surface of the compression spring until it reaches the other end side of the compression spring, and the lock side contact plate portion may be provided on the lock side guide portion.

With this configuration, the output side guide portion and the lock side guide portion are positioned to the sides of the compression spring, so that when the electric drive unit operates instantaneously, the output side guide portion and the lock side guide portion can position the compression spring in a predetermined position so that the compression spring does not swing radially. This can prevent damage to the compression spring.

The lock side guide portion according to the fifth aspect of the present disclosure may be in the form of a plate extending in the radial direction of the compression spring. The output side guide portion may be disposed away from the lock side guide portion in the circumferential direction of the compression spring, and may be in the form of a plate extending in the radial direction of the compression spring and in a direction intersecting the lock side guide portion. In this case, the output side abutment plate portion may be formed with a first output side slit that slides when the lock side guide portion is inserted, and a second output side slit that slides when the output side guide portion is inserted, and the lock side abutment plate portion may be formed with a first lock side slit that slides when the output side guide portion is inserted, and a second lock side slit that slides when the lock side guide portion is inserted.

According to this configuration, the lock side guide portion and the output side guide portion are inserted into the first output side slit and the second output side slit, respectively, and the output side guide portion and the lock side guide portion are inserted into the first lock side slit and the second lock side slit, respectively, and in this state, each component can slide. Therefore, since the relative circumferential positional relationship of the output side guide portion and the lock side guide portion is determined by the lock side abutment plate portion and the output side abutment plate portion, it is possible to suppress the output side guide portion from swinging or twisting relative to the lock side guide portion, and as a result, the load on each component can be reduced.

The output side guide portion according to the sixth aspect of the present disclosure may be provided with an output side engagement protrusion that engages with a surface of the output side abutment plate portion that is located on the opposite side to the compression spring. Also, the lock side guide portion may be provided with a lock side engagement protrusion that engages with a surface of the lock side abutment plate portion that is located on the opposite side to the compression spring.

With this configuration, the output side contact plate can be provided so that it can slide relative to the output side guide portion but cannot come off, even though it is a simple configuration of providing an output side engagement protrusion. Similarly, the lock side contact plate can be provided so that it can slide relative to the lock side guide portion but cannot come off, even though it is a simple configuration of providing a lock side engagement protrusion.

It can also be based on an opening and closing device, in which case it includes the door, a door support member that supports the door, a hinge that rotatably connects the door to the door support member, and the electric locking/unlocking device.

As explained above, an elastic member that elastically deforms when subjected to compressive force is interposed between the locking member that locks the latch operating member and the output part of the electric drive device that operates the locking member. This makes it possible to reduce damage to the elastic member itself while mitigating the impacts applied to each part, thereby further increasing durability.

1 is a perspective view showing a part of an opening/closing device equipped with an electric locking/unlocking device according to an embodiment. FIG. 2 is a perspective view of the electric locking/unlocking device when locked. FIG. 3 is a view equivalent to FIG. 2 when unlocked. FIG. 2 is a side view of the electric locking/unlocking device when locked. 11 is an enlarged side view showing the vicinity of the compression spring when locked. FIG. 13 is an enlarged front view showing the vicinity of the compression spring when locked. FIG. FIG. 6 is a view equivalent to FIG. 5 at the moment of unlocking. FIG. 7 is a view equivalent to FIG. 6 at the moment of unlocking. FIG. 3 is a view equivalent to FIG. 2 during abnormal operation.

The following describes in detail an embodiment of the present invention with reference to the drawings. Note that the following description of the preferred embodiment is essentially merely an example and is not intended to limit the present invention, its applications, or its uses.

Figure 1 is a perspective view showing a part of an opening/closing device 100 equipped with an electric locking/unlocking device (details are shown in Figure 2 and subsequent figures) according to an embodiment of the present invention. This opening/closing device 100 is installed and used in, for example, various buildings. Examples of buildings in which the opening/closing device 100 is installed include various buildings, factories, research facilities, and the like. In this embodiment, a case in which the opening/closing device 100 is installed in a research facility will be described. The opening/closing device 100 can be installed in walls, skeletal members, and the like that make up a research facility, and is used to open and close rooms, chambers, and passageways.

The opening and closing device 100 includes a door 101, a door support member 102 that supports the door 101, and a hinge (not shown) that rotatably connects the door 101 to the door support member 102. The hinge includes a rotation shaft (not shown) that extends in the vertical direction, and the door 101 rotates around the axis of the hinge to switch between a closed state (shown) and an open state (not shown).

The door 101 has an electric locking/unlocking device 1 as shown in FIG. 2 etc. built in, and is provided with a handle 104 for opening and closing, a latch 105, and a latch operating member 106. The handle 104 is rotatably provided with respect to the main body of the door 101. The rotational force of the handle 104 is converted into a horizontal force and transmitted to the latch operating member 106. The latch 105 can be switched between an advanced state and a retracted state by moving the latch operating member 106 horizontally. When in the advanced state, the latch 105 engages with the door support member 102 to hold the door 101 in the closed state.

The configurations of the handle 104, the yoke 105, and the yoke operating member 106 are not limited to those described above, and may be any configuration. For example, the handle 104 may be a lever type. The number and positions of the yokes 105 may also be set arbitrarily. The shape and position of the yoke operating member 106 may also be set arbitrarily.

As shown in FIG. 4, the door 101 includes a base plate 101a on which the electric locking/unlocking device 1 is attached, and a cover member 101b that covers the electric locking/unlocking device 1 attached to the base plate 101a. Between the base plate 101a and the cover member 101b, a storage space R capable of storing the electric locking/unlocking device 1 is formed.

As shown in FIG. 2, the electric locking/unlocking device 1 is capable of maintaining the latch 105 in an advanced state by preventing the latch operating member 106 from retracting, which is the locked state. On the other hand, the electric locking/unlocking device 1 is capable of switching from the locked state to the unlocked state shown in FIG. 3, in which the latch operating member 106 is allowed to retract.

The specific configuration of the electric locking/unlocking device 1 is described below. The electric locking/unlocking device 1 includes a locking member 2 that can move in the vertical direction, an electromagnetic solenoid 3 as an electric drive device that drives the locking member 2, a locking side connecting member 4, a compression spring 5, a connecting pin 6, an upper guide member 7 and a lower guide member 8, a manual unlocking mechanism 9, and an output side connecting member 10.

The locking member 2 is a member for locking the latch operating member 106 so that the latch operating member 106 does not become open, and is made of a high-strength metal plate material. The locking member 2 is made of a long and thin member, and is provided so that the longitudinal direction of the locking member 2 roughly coincides with the up-down direction. The width direction of the locking member 2 roughly coincides with the width direction of the door 101, and the locking member 2 extends along the inner surface of the door 101. For convenience of explanation, the width direction of the locking member 2 is taken as the left-right direction, and the right side and left side are defined as shown in each figure, but this does not limit the actual usage state.

The left-right position of the locking member 2 is determined by the upper guide member 7 and the lower guide member 8. The locking member 2 is provided at its vertical intermediate portion with a plate-shaped abutment portion 2a that is a protruding portion that protrudes in a direction intersecting with the movement direction of the locking member 2, i.e., to the right. The abutment portion 2a may protrude to the left. The abutment portion 2a is integrally formed with the main body portion 2b of the locking member 2, and the main body portion 2b and the abutment portion 2a can be cut out integrally by cutting a plate material of a predetermined shape, for example. The abutment portion 2a may be formed of a separate member from the main body portion 2b. In this case, the abutment portion 2a may be fixed to the main body portion 2b. Although the abutment portion 2a has a rectangular shape when viewed from the front, the shape of the abutment portion 2a is not limited to a rectangular shape and can be set to any shape. A plurality of abutment portions 2a may be provided so as to protrude toward both the left and right sides.

The lower end of the locking member 2 is a blocking portion 2c for blocking the movement of the latch operating member 106. As shown in FIG. 2, when the locking member 2 moves downward, the blocking portion 2c is positioned to face the end 106a of the latch operating member 106 in the advanced state, thereby blocking the latch operating member 106 from moving backward (moving in the opening direction). This position is the locked position. On the other hand, as shown in FIG. 3, when the locking member 2 moves upward, the blocking portion 2c is positioned above the end 106a of the latch operating member 106, thereby allowing the latch operating member 106 to move backward. This position is the unlocked position. In other words, the locking member 2 is arranged to be switchable from the locked position to the unlocked position and from the unlocked position to the locked position.

An engagement pin 2d is provided at the upper end of the locking member 2. The engagement pin 2d extends in a direction intersecting the movement direction (up-down direction) of the locking member 2, and specifically, extends so as to protrude in the thickness direction of the locking member 2. The engagement pin 2d is formed of a separate member from the locking member 2, and may be formed of, for example, a pin-shaped member, or a member having a shaft such as a bolt or screw. When a bolt or screw is provided, the shaft of the bolt or screw is a part that can become the engagement pin 2d.

The electromagnetic solenoid 3 is for switching the locking member 2 between a locked position that locks the latch operating member 106 and an unlocked position that unlocks the latch operating member 106. The electromagnetic solenoid 3 may have a conventionally known structure and includes a coil, a fixed iron core, a movable iron core, a frame, etc., not shown. As shown in Figures 2 and 3, the electromagnetic solenoid 3 is disposed above and away from the upper end of the locking member 2. Instead of the electromagnetic solenoid 3, an electric drive device using, for example, gears and a motor may also be used.

The electromagnetic solenoid 3 has a main body 3a incorporating a coil, a fixed iron core, a movable iron core, etc., an output part 3b fixed to the movable iron core and integrated with the movable iron core, and a movable part 3c similarly fixed to the movable iron core and integrated with the movable iron core. The moving iron core moves up and down, and in this embodiment, as shown in FIG. 4, the output part 3b is disposed directly above the upper end of the locking member 2, and in this state, the main body 3a is fixed to the board 101a of the door 101. The output part 3b protrudes downward from the main body 3a. By switching the voltage applied to the coil of the electromagnetic solenoid 3, the movable iron core, i.e., the output part 3b and the movable part 3c, can be moved up and down, and can be switched between an advanced state in which the output part 3b is moved downward and advanced as shown in FIG. 2, and a retracted state in which the output part 3b is moved upward and retracted as shown in FIG. 3.

Although not shown, a control unit is connected to the electromagnetic solenoid 3. An operating means consisting of an operating button, switch, etc. for locking and unlocking is connected to the control unit, and the control unit detects the operating state of this operating means and applies a predetermined voltage to the electromagnetic solenoid 3. The electromagnetic solenoid 3 switches from the advanced state to the retracted state and from the retracted state to the advanced state the moment a voltage is applied, and the operating speed is high. The electromagnetic solenoid 3 may be locked in the advanced state and unlocked in the retracted state, or may be locked in the retracted state and unlocked in the advanced state.

The movable part 3c of the electromagnetic solenoid 3 protrudes upward from the main body part 3a. The movable part 3c is linked to the output part 3b, and moves upward when the output part 3b retracts, and moves downward when the output part 3b advances.

A compression spring 5 is disposed below the main body 3a of the electromagnetic solenoid 3 and above the locking member 2, i.e., between the locking member 2 and the output portion 3b of the electromagnetic solenoid 3. The compression spring 5 is a so-called coil spring formed by winding a wire in a spiral shape, and can also be called a helical spring or a helical spring. The wire of the compression spring 5 may be formed of, for example, a metal material or a resin material. The shape of the coil portion can be set arbitrarily, and may be any shape such as a cylindrical shape, a barrel shape, or a cone shape. The compression spring 5 is disposed so that the axial direction, which is the elastic deformation direction, faces the vertical direction. One side (lower side) of the compression spring 5 in the elastic deformation direction is positioned on the locking member 2 side, and the other side (upper side) of the compression spring 5 in the elastic deformation direction is positioned on the electromagnetic solenoid 3 side. Therefore, when subjected to a compressive force in the vertical direction, the compression spring 5 elastically deforms in the direction in which the wire gap narrows, and returns to its original state when the compressive force is removed. In other words, the compression spring 5 is an elastic member that elastically deforms when it receives a compressive force from the locking member 2 side toward the electromagnetic solenoid 3 side or a compressive force from the electromagnetic solenoid 3 side toward the locking member 2 side.

The locking member 2 is connected to a locking side connecting member 4. The locking side connecting member 4 is made of a high-strength metal plate material, has a vertically elongated shape, and is arranged so as to overlap at least the upper portion of the locking member 2 in the thickness direction. In this state, the upper portion of the locking side connecting member 4 is located above the upper end of the locking member 2.

The lower part of the locking side connecting member 4 is provided with a movement allowance portion 4a for allowing the locking member 2 to move relatively. The movement allowance portion 4a is a portion for allowing the locking member 2 to move to the unlocked position when the output portion 3b of the electromagnetic solenoid 3 is fixed in a state in which the locking member 2 is in the locked position. For example, the movement allowance portion 4a can be configured as a long hole through which the engagement pin 2d of the locking member 2 is inserted, and the engagement pin 2d is relatively movable in the vertical direction within the long hole. This long hole is formed long in the movement direction of the locking member 2 and is a hole that penetrates the locking side connecting member 4 in the thickness direction. The movement allowance portion 4a is formed in a region of approximately the lower half of the locking side connecting member 4. The opening width of the movement allowance portion 4a is set narrower than the outer diameter of the head provided at the tip of the engagement pin 2d so that the head does not come out.

The lock side connecting member 4 extends until it reaches the upper end side of the compression spring 5. The lock side connecting member 4 has two lock side guide portions 4b. That is, the upper portion of the lock side connecting member 4, i.e., the portion located above the portion where the movement allowance portion 4a is formed, is the lock side guide portion 4b. The two lock side guide portions 4b are arranged to sandwich the compression spring 5 from the left and right (radial direction), extend along the outer peripheral surface of the compression spring 5 until they reach the upper end side of the compression spring 5, and protrude upward beyond the end face (upper end face) of the upper end side of the compression spring 5.

The two lock side guide parts 4b are both plate-shaped extending in the radial direction of the compression spring 5. The lock side guide part 4b is provided with a lock side abutment plate part 4c. The lock side abutment plate part 4c is a circular member extending along the upper end surface of the compression spring 5 and abuts against the upper end surface of the compression spring 5. The lock side guide part 4b is provided with a lock side engagement protrusion 4d that engages with the surface of the lock side abutment plate part 4c located on the opposite side to the compression spring 5, i.e., the upper surface of the lock side abutment plate part 4c. The lock side engagement protrusion 4d engages with the upper surface of the lock side abutment plate part 4c, thereby restricting the lock side abutment plate part 4c from moving further upward relative to the lock side guide part 4b.

On the other hand, the output side connecting member 10 is connected to the output part 3b of the electromagnetic solenoid 3 by a connecting pin 6 made of, for example, a metal material. As shown in FIG. 4, a pin insertion hole 3d is formed on each of the left and right sides of the output part 3b of the electromagnetic solenoid 3 so as to penetrate in the left and right direction. The connecting pin 6 is oriented to extend in the left and right direction, and is held in the output part 3b with both left and right ends inserted into the pin insertion hole 3d of the output part 3b. A retaining ring (not shown), for example, can be used to prevent the connecting pin 6 from coming off. The connecting pin 6 is positioned above and away from the compression spring 5.

The left-right middle part of the connecting pin 6 penetrates the upper part of the output side connecting member 10. The output side connecting member 10 is made of a high-strength metal plate material, has a vertically long shape, and extends in the thickness direction of the door 101.

The output side connecting member 10 extends until it reaches the lower end side of the compression spring 5. The output side connecting member 10 has two output side guide parts 10b. That is, the lower part of the output side connecting member 10, i.e., the part located below the part through which the connecting pin 6 penetrates, is the output side guide part 10b. The two output side guide parts 10b are arranged away from the lock side guide part 4b in the circumferential direction of the compression spring 5, and are plate-shaped extending in the radial direction of the compression spring 5 and in a direction intersecting with the lock side guide part 4b. The output side guide part 10b and the lock side guide part 4b are apart by 90° in the circumferential direction of the compression spring 5, and therefore the output side guide part 10b is arranged to sandwich the compression spring 5 from the thickness direction of the door 101. The output side guide part 10b extends along the outer peripheral surface of the compression spring 5 until it reaches the lower end side of the compression spring 5, and protrudes downward from the end face (lower end face) of the lower end side of the compression spring 5.

The output side guide portion 10b is provided with an output side abutment plate portion 10c. The output side abutment plate portion 10c is a circular member extending along the lower end surface of the compression spring 5 and abuts against the lower end surface of the compression spring 5. The output side guide portion 10b is provided with an output side engagement protrusion 10d that engages with the surface of the output side abutment plate portion 10c located on the opposite side to the compression spring 5, i.e., the lower surface of the output side abutment plate portion 10c. The output side engagement protrusion 10d engages with the lower surface of the output side abutment plate portion 10c, thereby restricting the output side abutment plate portion 10c from moving further downward relative to the output side guide portion 10b.

The output side abutment plate portion 10c is formed with a first output side slit 10e that slides when the lock side guide portion 4b is inserted, and a second output side slit 10f that slides when the output side guide portion 10b is inserted. Since there are two lock side guide portions 4b, two first output side slits 10e are also formed, and the first output side slits 10e extend in the left-right direction. Since there are two output side guide portions 10b, two second output side slits 10f are also formed, and the second output side slits 10f extend in the thickness direction of the door 101. Therefore, the extension direction of the first output side slits 10e and the extension direction of the second output side slits 10f are mutually perpendicular.

The lock side abutment plate 4c is formed with a first lock side slit 4e into which the output side guide 10b slides when inserted, and a second lock side slit 4f into which the lock side guide 4b slides when inserted. Since there are two output side guides 10b, two first lock side slits 4e are also formed, and the first lock side slits 4e extend in the thickness direction of the door 101. Since there are two lock side guides 4b, two second lock side slits 4f are also formed, and the second lock side slits 4f extend in the left-right direction. Therefore, the extension direction of the first lock side slit 4e and the extension direction of the second lock side slit 4f are mutually perpendicular.

The upper guide member 7 is a member for guiding the locking member 2, which moves between the locked position and the unlocked position, in the direction of movement. As shown in FIG. 4, the upper guide member 7 includes a fixed plate portion 7a fixed to the substrate 101a and a guide plate portion 7b protruding from the fixed plate portion 7a toward the cover member 101b, and is made of a metal plate material similar to that of the locking member 2. The guide plate portion 7b is formed with a guide hole 7c through which the locking member 2 is inserted in the moving direction. The guide hole 7c is formed to extend long in the left-right direction in accordance with the cross-sectional shape of the locking member 2. When the locking member 2 moves, the outer surface of the locking member 2 slides on the inner surface of the guide hole 7c, thereby being guided in the up-down direction. In addition, the left-right movement of the locking member 2 is restricted by the inner surface of the guide hole 7c.

The upper guide member 7 is positioned above the abutment portion 2a of the locking member 2. Therefore, when the locking member 2 is switched from the locked position to the unlocked position, the abutment portion 2a of the locking member 2 abuts against the peripheral portion of the guide hole 7c of the upper guide member 7 from the direction of movement of the locking member 2. Specifically, the upper end of the abutment portion 2a of the locking member 2 abuts against the peripheral portion of the guide hole 7c of the upper guide member 7 from below. This defines the raised position of the locking member 2.

The lower guide member 8 is configured similarly to the upper guide member 7, and has a fixed plate portion 8a and a guide plate portion 8b, with a guide hole 8c formed in the guide plate portion 8b. The upper and lower guide members 7 and 8 guide the upper and lower sides of the lock member 2 in the vertical direction, respectively.

The manual unlocking mechanism 9 is a mechanism for moving the locking member 2, which is in the locked position, to the unlocked position by manual operation from outside the door 101. That is, the manual unlocking mechanism 9 has a fixed plate 90 fixed to the base plate 101a of the door 101, an operation button 91 for manual unlocking, and a swinging plate 92. The operation button 91 is disposed so as to face the outside from a cover member 101b so that it can be manually operated from outside the door 101. As shown in FIG. 4, the operation button 91 is normally covered by a button cover 101c to prevent it from being operated by mistake, but this button cover 101c may be omitted.

The operation button 91 can be pressed, for example, with a finger, and is supported by the fixed plate 90 so that it can move inward of the door 101 (toward the base plate 101a) by the pressing force of the finger. The operation button 91 is provided with a movable plate 91a. When the operation button 91 is pressed, the movable plate 91a also moves in the same direction. The rocking plate 92 is attached to the fixed plate 90 so that it can rock up and down by a shaft 92a extending in the left-right direction. The rocking plate 92 is provided with an engagement protrusion 92b. This engagement protrusion 92b is adapted to engage with the movable plate 91a of the operation button 91. When the operation button 91 is pressed and the movable plate 91a moves, the movable plate 91a presses the engagement protrusion 92b, causing the rocking plate 92 to rotate upward around the shaft 92a.

Abutment portion 2a of locking member 2 is disposed above rocking plate 92 so as to engage with rocking plate 92 as it rotates upward. In other words, abutment portion 2a of locking member 2 is disposed so as to engage with rocking plate 92 and receive the force in the unlocking direction (upward force around shaft 92a) output from manual unlocking mechanism 9.

(Locking operation)
The locking operation is performed with the latch operating member 106 in the advanced state. When the locking operation is performed by the locking/unlocking operation button (not shown), the electromagnetic solenoid 3 advances the output portion 3b as shown in FIG. 2. This causes the locking member 2 connected to the output portion 3b via the output side connecting member 10, the compression spring 5, and the lock side connecting member 4 to move downward and be placed in the locked position. At this time, the locking member 2 can be moved downward by its own weight, but it may also be moved downward by the biasing force of a biasing means such as a spring (not shown). When the locking member 2 is placed in the locked position, the blocking portion 2c is placed so as to face the end portion 106a of the latch operating member 106 in the advanced state, thereby preventing the latch operating member 106 from retracting.

(Unlocking operation)
When an unlocking operation is performed by a locking/unlocking operation button (not shown), the electromagnetic solenoid 3 retracts the output portion 3b as shown in Fig. 3. As a result, the locking member 2 connected to the output portion 3b via the output side connecting member 10, the compression spring 5, and the locking side connecting member 4 moves upward and is positioned at the unlocked position, so that the blocking portion 2c is positioned above the end portion 106a of the latch operating member 106. Therefore, the latch operating member 106 is allowed to retract. The locking member 2 is guided in the vertical direction by the upper guide member 7 and the lower guide member 8, so that when moving from the locked position to the unlocked position and from the unlocked position to the locked position, the locking member 2 moves along a predetermined trajectory, and the operation is performed smoothly.

When switching from the locked position to the unlocked position, the electromagnetic solenoid 3 momentarily retracts the output portion 3b, causing the locking member 2 to rise at high speed. Figures 7 and 8 show the state of the compression spring 5 at the moment of unlocking. At the moment of unlocking, a compressive force acts on the compression spring 5 in the vertical direction, causing the compression spring 5 to contract between the locking side contact plate portion 4c and the output side contact plate portion 10c. As the compression spring 5 contracts, the distance between the locking side contact plate portion 4c and the output side contact plate portion 10c becomes shorter. After that, the compression spring 5 returns to its original state, and the distance between the locking side contact plate portion 4c and the output side contact plate portion 10c returns to its original position, as shown in Figures 5 and 6.

In addition, in this embodiment, the locking member 2 is provided with an abutment portion 2a, and when switching from the locked position to the unlocked position, the abutment portion 2a abuts against the periphery of the guide hole 7c of the upper guide member 7 to regulate the upward movement of the locking member 2 so that it does not move upward more than necessary. In other words, the position of the abutment portion 2a and the position of the upper guide member 7 prevent the locking member 2 from rising excessively, so that the impact force acting on the compression spring 5 and the connecting pin 6 can be significantly reduced. Even after the abutment portion 2a abuts against the upper guide member 7, an upward inertial force acts on the locking side connecting member 4, so that the compression spring 5 is compressed between the locking side abutment plate portion 4c and the output side abutment plate portion 10c. As the compression spring 5 is compressed, the inertial force acting on the locking side connecting member 4 is attenuated, and the impact force acting on the connecting pin 6 can be further reduced. After that, the compression spring 5 is restored, and the distance between the locking side abutment plate portion 4c and the output side abutment plate portion 10c returns to its original value.

(Emergency unlocking)
Next, emergency unlocking will be described. For example, if the electromagnetic solenoid 3 fails to move in the advanced state due to a malfunction of the electromagnetic solenoid 3, the locking member 2 remains in the locked position, and the latch 105 cannot be moved backward. In such an emergency, the operation button 91 of the manual unlocking mechanism 9 is pressed from the outside of the door 101. Then, the movable plate 91a moves and the movable plate 91a presses the engagement protrusion 92b of the swing plate 92, which causes the swing plate 92 to rotate upward around the shaft 92a, and an upward force acts on the abutment portion 2a of the locking member 2. This causes the locking member 2 to move upward. Since the engagement pin 2d of the locking member 2 is inserted into the movement allowance portion 4a of the locking side connecting member 4, the upward movement of the locking member 2 is allowed even if the locking side connecting member 4 does not move upward, and thus the locking member 2 can be placed in the unlocked position.

Even when manually shifting to the unlocked position, the contact portion 2a can be brought into contact with the periphery of the guide hole 7c of the upper guide member 7, so the impact force acting on the compression spring 5 and the connecting pin 6 can be significantly reduced.

(When abnormal operation occurs)
Next, an abnormal operation will be described. As shown in Fig. 9, it is assumed that the output part 3b of the electromagnetic solenoid 3 retracts in a state where the locking member 2 in the locked position cannot be moved to the unlocked position because it is caught on another member, for example. In this case, since the compression spring 5 is interposed between the output part 3b of the electromagnetic solenoid 3 and the locking member 2, the compression spring 5 contracts between the locking side contact plate part 4c and the output side contact plate part 10c, allowing the output part 3b to retract. This prevents damage to the electromagnetic solenoid 3.

(Effects of the embodiment)
As described above, according to this embodiment, by advancing the output portion 3b of the electromagnetic solenoid 3, the locking member 2 switches from the unlocked position to the locked position, and the yoke operating member 106 is locked. On the other hand, by retracting the output portion 3b of the electromagnetic solenoid 3, the locking member 2 switches from the locked position to the unlocked position, and the yoke operating member 106 is unlocked.

In the event of an abnormality, when the locking member 2 is fixed in the locked position and a voltage is applied to the electromagnetic solenoid 3 in a direction that causes the output part 3b to retract, the compression spring 5 receives a compressive force and elastically deforms. This allows the electromagnetic solenoid 3 to retract, preventing damage to the electromagnetic solenoid 3.

In addition, when the electromagnetic solenoid 3 operates instantaneously when the locking member 2 is switched from the locked position to the unlocked position, or from the unlocked position to the locked position, the compression spring 5 elastically deforms, mitigating the impact on each part. Furthermore, because the compression spring 5 is a member that elastically deforms when subjected to a compressive force, there is no need for a structure in which a hook portion is hooked, as in conventional tension springs, and problems such as wear and breakage of the hook portion do not occur. Therefore, durability can be further improved.

The above-described embodiments are merely illustrative in all respects and should not be interpreted as limiting. Furthermore, all modifications and variations within the scope of the claims are within the scope of the present invention.

As described above, the electric locking/unlocking device disclosed herein can be installed and used on doors installed in various buildings, for example.

1 Electric locking/unlocking device 2 Locking member 3 Electromagnetic solenoid (electric drive device)
3b Output portion 4 Lock side connecting member 4b Lock side guide portion 4c Lock side abutment plate portion 4d Lock side engagement projection 4e First lock side slit 4f Second lock side slit 5 Compression spring 10 Output side connecting member 10b Output side guide portion 10c Output side abutment plate portion 10d Output side engagement projection 10e First output side slit 10f Second output side slit 106 Latch operating member

Claims (7)

A locking member that locks a latch operating member provided on the door;
An electric locking/unlocking device including an electric drive device for switching the locking member between a locking position for locking the latch operation member and an unlocking position for unlocking the latch operation member,
An electric locking/unlocking device characterized in that an elastic member is interposed between the locking member and the output section of the electric drive unit, the elastic member being elastically deformed when it receives a compressive force from the locking member side toward the electric drive unit side or a compressive force from the electric drive unit side toward the locking member side. The electric locking/unlocking device according to claim 1,
the elastic member is a compression spring,
One side of the compression spring in the elastic deformation direction is positioned on the lock member side,
An electric locking/unlocking device, characterized in that the other side of the compression spring in the elastic deformation direction is positioned on the electric drive device side. In the electric locking/unlocking device according to claim 2,
an output side connecting member extending to reach one end side of the compression spring is connected to the output portion of the electric drive device,
The output-side connecting member is provided with an output-side abutment plate portion that extends along an end surface of one end of the compression spring and abuts against the end surface of the one end,
A lock-side connecting member is connected to the lock member and extends to reach the other end of the compression spring,
An electric locking/unlocking device characterized in that the locking side connecting member is provided with a locking side abutment plate portion extending along the end face of the other end of the compression spring and abutting the end face of the other end. In the electric locking/unlocking device according to claim 3,
the output-side connecting member has an output-side guide portion that extends along an outer circumferential surface of the compression spring until it reaches one end side of the compression spring, and the output-side abutment plate portion is provided on the output-side guide portion,
An electric locking/unlocking device characterized in that the lock side connecting member has a lock side guide portion extending along the outer peripheral surface of the compression spring until it reaches the other end side of the compression spring, and the lock side abutment plate portion is provided on the lock side guide portion. In the electric locking/unlocking device according to claim 4,
The lock-side guide portion has a plate shape extending in a radial direction of the compression spring,
the output side guide portion is disposed away from the lock side guide portion in a circumferential direction of the compression spring, and has a plate shape extending in a radial direction of the compression spring and in a direction intersecting with the lock side guide portion,
a first output side slit into which the lock side guide portion slides when inserted, and a second output side slit into which the output side guide portion slides when inserted,
An electric locking/unlocking device characterized in that the lock side abutment plate portion is formed with a first lock side slit through which the output side guide portion slides when inserted, and a second lock side slit through which the lock side guide portion slides when inserted. In the electric locking/unlocking device according to claim 5,
the output-side guide portion is provided with an output-side engagement protrusion that engages with a surface of the output-side abutment plate portion that is located on the opposite side to the compression spring,
An electric locking/unlocking device characterized in that the locking side guide portion is provided with a locking side engagement protrusion that engages with a surface of the locking side abutment plate portion located opposite the compression spring. The door;
A door support member for supporting the door;
a hinge that rotatably connects the door to a door support member;
An opening and closing device comprising the electric locking/unlocking device according to any one of claims 1 to 6.