JP4784934B2 - desk - Google Patents

Description

  The present invention relates to a desk that can drive a lock main body that is pulled out and unlocked with a simple configuration, or that can be appropriately operated electrically or manually.

  In a desk, the drawer can be locked and unlocked electrically. For example, as shown in Patent Document 1, a lock-shaped lock body provided in a drawer end plate and a casing surrounding the drawer are provided. What is comprised from the to-be-engaged part provided in the side wall, and the drive device which consists of a reduction motor and a limit switch which are provided in the said end plate and drive a lock main body and selectively engage with the to-be-engaged part. Are known.

The drive device can be operated by a manual operation so as to cope with an emergency such as a power failure or a battery exhaustion. In other words, the bolt-shaped lock body utilizes a cylinder lock dead bolt attached to a drawer end plate, and when the cylinder lock is operated, the lock body can be manually operated.
JP 2003-97108 A

However, as described above, the lock body is provided on the end plate and is operated in the horizontal direction so that it engages with the side wall of the housing. It becomes difficult to apply to etc. It can be considered that the movement of the deadbolt is converted into the rotational movement of the lock body so that it engages with the engaged part provided on the lower surface of the top plate. Therefore, it is necessary to use a drive source that self-holds the drive position at two positions, such as a solenoid. In such a case, the durability is hindered. Further, whether it is a combination of a reduction motor and a limit switch or a solenoid, the drive source that drives in both directions is not simple in structure and control.

On the other hand, from the viewpoint of the combination of the electric drive system and the manual operation system, the reduction motor and the cylinder lock always move linearly, and when driven from the motor, the cylinder lock is dragged, and when operating from the cylinder lock, If the motor is dragged, in any case, an unnecessary load is applied to the mechanical parts, causing a failure and making manual operation difficult. This is the same even when a solenoid is used. What is frequently used like drawers is required to be able to operate easily even in the case of manual operation as well as in the case of electric drive, and unnecessary load is frequently applied during electric drive. Improvement is desired to shorten the product life.

The present invention aims to effectively solve these problems.

  In order to achieve this object, the present invention takes the following measures.

That is, the present invention is such that the lock body is selectively engaged with the engaged portion by the drive device to perform locking and unlocking of the drawer, and the drive device is a lock type having an on / off state. An alternate type latch mechanism, a drive mechanism that repeatedly performs an operation in the same direction every time there is an input, and switches the on / off state of the latch mechanism by the operation, and the latch mechanism associated with the latch mechanism A desk comprising: a lock body that moves to a locked position when in an on state and moves to an unlocked position when in an off state; and the drive device is arranged in a drawer.

With such a lock-type alternate type latch mechanism, the on / off state can be switched contrarily even using a relatively simple drive source that repeats the same operation. Therefore, it is not necessary to use a complicated drive source that performs different operations when switching the on / off state of the latch mechanism and maintains the holding force by energization at the drive position. This simplifies and reduces costs. Since the lock body is associated with the latch mechanism, the output element can be accurately moved and held at the first and second drive positions through the latch mechanism. Further, such a driving device is arranged in the drawer, and the operating position can be held by the latch mechanism even if the lock body is operated in a direction in which its own weight acts. It is also possible to easily obtain it from a plate or the like.

In order to secure the operating margin and to be able to cope effectively with flat drawers, the latch mechanism operates horizontally in the drawer, and the lock body rises upward from the unlocking position located in the drawer. It is desirable to be configured to move between locking positions that engage with engaged portions provided on the top plate lower surface side.

In order to hold the driving position with certainty, it is effective to set at least the self-weight of the lock body to act in the direction opposite to the direction toward the switching point with respect to the latch mechanism.

In particular, according to the present invention, the leg body supporting the top plate is connected between the front and rear leg struts and between the left and right leg struts on the rear end side with a horizontal member, and the left and right leg struts on the front end side The front end side is opened, and it is useful to be applied to a flat one in which the drawer is arranged so as to fit within the thickness of the horizontal member at the opened portion.

Alternatively, the drawer is disposed on the lower surface side over substantially the entire width direction of the top plate, and is useful when applied with a small number of places for locking.
In order to facilitate the incorporation and enable the present invention to be effectively applied even after retrofitting, at least the drive system is accommodated in the unit case and arranged in the drawer, and the bracket is attached to the desk body side. It is preferable that the end portion is supported by a leg that supports the top plate, the tip portion is extended along the bottom surface of the top plate, and the engaged portion is formed at the tip portion.

On the other hand, the other configuration of the present invention is such that the lock body is selectively engaged with the engaged portion by the locking / unlocking device to perform the locking / unlocking of the drawer. An input unit, a lock body that operates between the lock position and the unlock position by a driving force input from the electric input unit, and the lock body is moved between the lock position and the unlock position by an external operation force and and a manual input unit for, in association with the lock body so as to operate without the reverse driving other party mutually motorized input and manual input unit, place the locking and unlocking device in a drawer At least the drive system is housed in the unit case and placed in the drawer, and a bracket is attached to the desk body. This bracket is supported by a leg that supports the top plate at the base end. , Extend the tip along the bottom of the top plate So it is characterized in that the forming the engaged portion at its distal end.

In this way, unlocking and unlocking can be realized either by electric drive or by manual operation from the outside, so that the plain has good usability by electric drive and can be unlocked and locked even in the event of an emergency such as a power failure. It is possible to effectively resolve difficult situations. In addition, since the other party is not reversely driven at any time, even if it is provided side by side, no drag resistance is involved, and it can be operated properly. And, since such a locking / unlocking device is arranged in the drawer, it is possible to effectively secure a built-in space , facilitate the incorporation, and effectively adopt the present invention even after retrofitting. Become.

Since the invention has the configuration described above, even if gravity or the like acts on the lock body, the drive source can be held in the drive position without being energized, and a desk with simplified structure and control can be provided. . In addition, when the electric drive system and the manual operation system are provided together, it is possible to provide a desk that has good operability in any case and eliminates a factor that reduces the product life.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

The desk 1 shown in FIGS. 1 and 2 is configured so that the center drawer 12 that is the object to be locked can be locked and unlocked by the locking and unlocking device 3 using the driving device 2 of the present invention. This desk 1 connects the front and rear leg struts 11a and 11b and the left and right leg struts 11b and 11b on the rear end side with a horizontal member 10, and opens the left and right leg struts 11a and 11a on the front end side. The top plate 13 is supported by the leg 11 and the drawer 2 can be taken in and out from the opened portion. The drawer 2 is almost within the thickness of the horizontal member 10, and the top 2 The plate 13 has a planar shape over substantially the entire width direction of the plate 13.

Then, engaged portions 14b as shown in FIG. 5 are arranged via brackets 14 on the lower surface in the vicinity of the left and right sides on the rear end side of the top plate 13, and the width direction inside the drawer 12 is shown in FIGS. The locking element 31 that can be engaged with and disengaged from the engaged portion 14b is arranged by using the unit cases 5 and 6, and in order to actuate the locking element 31, the electric unit case 5 is electrically driven. The drive device 2 and the manual operation unit 4 are incorporated.

Specifically, as shown in FIG. 15, the bracket 14 has a base end portion 14 m supported by a leg 11 that supports the top plate 13, and a distal end portion 14 n that extends along the lower surface of the top plate 13. Thus, the engaged portion 14b is formed at the tip portion 14n.

As shown in FIGS. 2 to 5, the lock element 31 is rotatably supported at the center of the plate-like main body 31 a by the unit cases 5 and 6 via the support shaft 31 x, and between the support shafts 31 x and 31 x. They are connected to each other via an interlocking shaft 3a, which is a synchronization mechanism, and constitute a lock body 3x. An upward sickle-like engagement portion 31b is formed at the tip of the lock element 31, and a drive piece 31c. Is drooping downward.

As shown in FIG. 2 and FIGS. 4 to 6, the driving device 2 has a lock-type alternate type latch mechanism 21 having an on / off state and a stepping motor 22 that is a driving source each time there is an input in the same direction. And a drive mechanism 2a that repeatedly performs the operation and switches the on / off state of the latch mechanism 21 by the operation. The latch mechanism 21 uses a so-called heart cam or the like to selectively hold the actuator 21a in the on state and the off state. The actuator 21a is pressed from the protruding position (off state) of A1 in FIG. Thus, after immersing up to the switching point T of A2, it is slightly returned by the built-in spring 21b and locked in the retracted position shown in A3 (on state), and unlocked by pressing again to the switching point T of A4. Then, the reversal operation of holding again at the protruding position of A5, that is, A1 (OFF state) is repeated. As shown in FIG. 2 and FIGS. 4 to 6 and the like, the drive mechanism 2a drives the rotary shaft 23 by reducing the rotation of the stepping motor 22 within the gear box 2x. The attached intermediate output shaft 23a is rotated, and one end of the floating link 24 is connected to the intermediate output shaft 23a through the long hole 24a. The other end of the floating link 24 is connected to the actuator 21a of the latch mechanism 21. It is connected via a connector 21c. The connector 21c is engaged by inserting an engaging piece 21c1 provided at one end into the operating element 21a from above, and the other end of the floating link 24 is pivotally attached to the intermediate portion via a support shaft n1. In this embodiment, the stepping motor 22 is activated each time an operation signal is input, and the intermediate output shaft 23a shown in FIG. 9 performs an intermittent rotation operation of 360 ° from A1 to A3 (from A3 to A5). It is configured to give. The intermediate output shaft 23a is set so as to energize one end of the long hole 24a of the floating link 24 in the course of one rounding operation and pull the actuator 21a of the latch mechanism 21 to the switching point T indicated by A2 or A4. Thus, the latch mechanism 21 is changed from the OFF state to the ON state in the process of A1 → A2 → A3 by one round operation of the intermediate output shaft 23a, and the latch mechanism 21 is A3 → in the next round operation. In the process of A4 → A5, the on state is switched to the off state. A light receiving unit 25 covered with a resin cover 25a as shown in FIG. 1 is arranged on the front surface of the end plate of the drawer 12, and a controller (not shown) is provided from the light receiving unit 25 by giving an operation signal from the remote control operation unit 25x. Then, the stepping motor 22 is driven.

The latch mechanism 21 and the lock element 31 are connected via a transmission portion A shown in FIGS. 2 and 4 to 6. The transmission part A is mainly composed of a drive link 32 extending in the depth direction. The actuator 21a of the latch mechanism 2 is connected to one end side of the drive link 32 via a connector 21c, and is shown on the rear end side. The drive piece 31c of the lock element 31 is connected through a support shaft n2 as shown in FIG. 5 and a hole 32d slightly larger than the support shaft n2. The connector 21c advances and retreats in the drawer 12 together with the operating element 21a in the protruding and retracting direction, the floating link 24 moves and maintains pivotal connection with the connector 21c via the support shaft n1, and the drive link 32 is a locking element. The support shaft n2 provided between the drive link 32 and the drive piece 31c is interlocked with each other by moving the support shaft n2 provided between the drive link 32 and the drive piece 31c while releasing the displacement in the height direction. Rotate around.

That is, while the drive link 32 operates in the horizontal direction, the lock element 31 moves to the lock position P, which is the first drive position, when the latch mechanism 21 is in the ON state shown in FIGS. Then, the lock element 31 is moved to the unlocked position Q, which is the second drive position, in the OFF state shown in FIGS. The engaging portion 31b of the locking element 31 rises upward at the locking position P, engages with the engaged portion 14b on the lower surface side of the top plate 13, and lies down at the unlocking position Q, thereby engaging with the engaged portion 14b. Release the engagement. If the external force is not applied to the support shaft n2 that pivotally attaches the lock element 31 and the drive link 32, an urging force in a direction away from the latch mechanism 21 acts due to the weight of the lock body 3x. In cooperation with a spring (not shown) that urges the operating element 21a in the protruding direction, the operating element 21 is applied in a direction opposite to the direction toward the switching point T in both the locking position P and the unlocking position Q. Be forced. Hereinafter, the transmission system from the intermediate output shaft 23a to the lock element 31 including the transmission portion A is referred to as a first transmission mechanism X as necessary, and serves as an input end of the driving force to the first transmission mechanism X. The intermediate output shaft 23a is referred to as an electric input unit.

On the other hand, as shown in FIGS. 2, 4 to 6, etc., the operation unit 4 transmits a cylinder lock 41 having a key operation unit 41 a that is a manual input unit, and the movement of the cylinder lock 41 to the lock element 31. A second transmission mechanism Y. The second transmission mechanism Y protrudes from the dead bolt 42 projecting so as to rotate the portion displaced from the axis of the cylinder lock 41 and the connector 21c so as to be positioned on the rotation locus of the dead bolt 42. The interlocking part 43 provided is provided, and the first transmission mechanism X and the connector 21c, the drive link 32, and the drive piece 31c are shared. That is, as shown in FIG. 10B1, when the lock element 31 is in the unlocked position Q, the dead bolt 42 is located away from the interlocking portion 43. When the key K is inserted and operated from this state and the cylinder lock 41 is rotated by a predetermined angle as in B1 → B2, the dead bolt 42 rotates around the axis and the interlocking portion 43 is energized. The actuator 21a of the latch mechanism 21 is pushed to the switching point T. After that, when the operating force is released, the actuator 21a is slightly returned as B2 → B3 by the weight of the lock body 31 and the action of the spring built in the latch mechanism 21, and the pair of lock elements 31 is moved to the interlocking shaft 3a. The dead bolt 42 is urged by the interlocking portion 43 to perform a slight return operation. From this position, the key K is once operated in the locking direction to give the dead bolt 42 of the cylinder lock 41 a slight return operation such as B3 → B4, thereby lifting the pair of locking elements 31. Is pushed to the switching point T of B4, and then the cylinder lock 41 is operated to rotate the dead bolt 42 by a predetermined angle as shown in B4 → B5, the weight of the lock body 31 and the spring built in the latch mechanism 21 are counteracted. Due to the force, the locking element 31 moves again to the unlocking position Q at the projecting position of the actuator 21a indicated by B5.

However, by operating the key K in one direction, the interlocking portion 43 is guided in a series of operations from B1 → B2 → B3 via the deadbolt 42, and by operating in the other direction, the interlocking portion is connected via the deadbolt 42. If a structure that can guide 43 through a series of operations from B3 to B4 to B5 is adopted, the slight return operation and return operation of the key K as described above can be made unnecessary.

As described above, in the present embodiment, the left and right lock elements 31 are connected to each other via the interlocking shaft 3a, and a pair of locks can be operated regardless of whether the drive device 2 is driven or the operation unit 4 is operated. The element 31 is actuated, and the locking element 31 is held at the locking position P or the unlocking position Q together with the reverse switching operation of the latch mechanism 2. Then, as shown in FIG. 10, when the operation unit 4 is operated as B1-> B2-> B3-> B4-> B5, the pair of lock elements 31 are interlocked via the interlocking shaft 3a, and the actuator of the latch mechanism 2 is operated. Although the idle link 24 is idled together with 21 a, the intermediate output shaft 23 a remains stationary only by changing the relative position in the long hole 24 a of the idle link 24, and the intermediate output shaft 23 a is not driven. Power will not be transmitted. That is, the space between the long hole 24a and the intermediate output shaft 23a functions as the clutch CL1. On the contrary, as shown in FIG. 9, when driven from the drive device 2 side in the order of A1, A2, A3, A4, and A5, although the pair of lock elements 31 are interlocked via the interlocking shaft 3a, the interlocking portion 43 is Only by moving the cylinder lock 41 away from the dead bolt 42, the operating force is not transmitted to the key operation portion 41a constituting the operation portion 4 of the cylinder lock 41. That is, the space between the dead bolt 42 and the interlocking portion 43 functions as the clutch CL2.

When the desk 1 of the present embodiment configured as described above is viewed from the viewpoint of the drive source, the desk 1 selectively engages the lock element 31 of the lock body 3x with the engaged portion 14b by the drive device 2. The drive device 2 is the same as the lock type alternate type latch mechanism 21 having an on / off state and the stepping motor 22 which is a drive source every time there is an input. A driving mechanism 2a that repeatedly performs the operation in the direction and switches the on / off state of the latch mechanism 21 by the operation, and a locking position that is associated with the latch mechanism 21 and that is the first driving position when the latch mechanism 21 is in the on state. A lock main body 3x that is an output element that moves to P and moves to a second drive position Q when it is in an OFF state, and this drive device 2 is arranged in the drawer 12. In the case of the lock type alternate type latch mechanism 21, the on / off state can be switched contrarily even using a relatively simple drive source that repeats the same operation as in the stepping motor 22. For this reason, there are many energization amounts, such as a speed reduction motor that requires a different operation by switching the on / off state of the latch mechanism 21 and requires a limit switch, and a solenoid that needs to maintain a holding force at the driving position. It is not necessary to employ a complicated drive source, and the drive source and control system can be simplified to reduce the cost. Since the lock body 3x is associated with such a latch mechanism 21, the lock body 3x can be accurately moved and held to the locking position P and the unlocking position Q through the latch mechanism 21, and the energization amount is reduced. Thus, running costs can be reduced and durability can be improved. Further, such a driving device 2 is arranged in the drawer 12, and even if the lock body 31 is operated in a direction in which its own weight acts, the operating position can be held by the latch mechanism 21, so that It is also possible to easily find the base of the top plate 13.

Specifically, the latch mechanism 21 operates horizontally in the drawer 12, and the lock body 3 x rises upward from the unlocking position Q located in the drawer 12 and is engaged on the lower surface side of the top plate 13. Since it is configured to move between the locking position P and the portion 14b, even if the drawer 12 is flat, it can be effectively incorporated to realize locking and unlocking.

Further, at least the weight of the lock body 3x is set so as to act on the latch mechanism 21 in the direction opposite to the direction toward the switching point T. The latch mechanism 21 is a lock type alternate type and is attached to the switching point T. Since the on / off state is not switched unless the force is directed, the lock body 3x can be reliably held at the drive position, and the effectiveness of the present invention can be ensured.

Further, in the desk 1, the leg 11 supporting the top plate 13 connects the front and rear leg posts 11a and 11b and the left and right leg posts 11b and 11b on the rear end side with a horizontal member 10, Between the left and right leg columns 11a, 11a on the front end side, a drawer 12 that is substantially within the thickness of the horizontal member 10 is disposed at the opened portion, and the drawer 12 is flat. However, even in such a case, locking and unlocking can be effectively realized.

In addition, the drawer 12 is arranged on the lower surface side over the substantially entire width direction of the top plate 13, and since there is no housing or the like around it, there are few places to lock. Even in such a case, locking and unlocking can be effectively realized by the present invention.

In addition to the above, the following effects are achieved in the present embodiment.

First, every time there is an input, a one-way intermittent operation is given to the intermediate drive shaft 23a from the stepping motor 22 as a drive source, and the on / off state of the latch mechanism 21 is switched by the intermittent operation of the intermediate drive shaft 23a. Therefore, it is easy to synchronize one operation of the stepping motor 22 and the intermittent operation in one direction of the intermediate drive shaft 23a, and the correlation between the intermittent operation of the intermediate drive shaft 23a and switching of the on / off state of the latch mechanism 21 is also good. Can be done.

In particular, since the intermediate drive shaft 23a revolves around the circumference displaced from the axis, the connection with the switching of the on / off state of the latch mechanism 21 by connecting the idle link 24 and performing the crank operation. Can be performed very simply.

Further, as described above, the stepping motor 22 is employed as the drive source, and the stepping motor 22 is configured to intermittently operate from the stepping motor to the intermediate drive shaft 23a. The stepping motor 22 operates with high accuracy even in open control. Further, since a limit switch or the like is not required, the drive mechanism 2a that is easy to control and low in cost can be realized.

Of course, from the viewpoint of the driving source alone, the present embodiment can be realized only by the driving device 2, so that the basic operation and effect of the present invention can be achieved even if the operation unit 4 is eliminated. Further, the latch mechanism 21 is not limited to the heart cam type as long as it is a lock type alternate type having an on / off state, and the drive source of the drive mechanism 2a repeatedly performs the operation in the same direction every time there is an input. If possible, it is not limited to a stepping motor.

On the other hand, from the viewpoint of providing the desk 1 of this embodiment with an electric drive system and a manual operation system, the desk 1 selects the locking element 31 constituting the lock body 3x by the locking / unlocking device 3 as the engaged portion 14b. Are engaged with each other to lock and unlock the drawer 12. The locking and unlocking device 3 is locked by an intermediate output shaft 23a as an electric input portion and a driving force input from the intermediate output shaft 23a. A lock body 3x that operates between the position P and the unlocking position Q, and a key operation unit 41a that is a manual input unit for moving the lock body 3x between the locking position P and the unlocking position Q by an external operation force; The intermediate output shaft 23a and the key operation part 41a are associated with the lock body 3x so that they can be operated without reversely driving the other party, and this locking / unlocking device 3 is disposed in the drawer 12. It is composed of That.

In this way, the locking and unlocking operation of the lock body 3x can be realized by electric drive or by manual operation from the outside. Unlocking and locking can be effectively performed by manual operation. Moreover, since the other party is not driven in reverse during any operation, it can be operated properly without drag resistance even if it is installed side-by-side, and it is used frequently because unnecessary loads are not applied to the mechanical parts. Even if it does not break down easily, manual operation can be performed easily. And since such a locking / unlocking device 3 is arrange | positioned in the drawer 12, it becomes possible to ensure an installation space effectively.

Specifically, the intermediate output shaft 23a that is an electric input unit and the key operation unit 41a that is a manual input unit are provided together on the right end side in the width direction of the drawer 12, and each is a mechanical one-way clutch CL1. Since the mechanical components such as the drive link 32 and the connector 21c are shared via the CL2 and connected to the lock body 3x, the problem of reverse driving can be reliably solved and a compact configuration can be realized. In particular, since the one-way clutch CL1 is a mechanical type, the function can be effectively maintained even in an emergency such as a power failure.

In this case, the intermediate output shaft 23a receives an operation signal in the light receiving unit 25 provided on the front side of the desk 1, and the key operation unit 41a can be operated from the lower surface side of the drawer 12. Therefore, the light reception unit 25 and the key operation unit 41a. The key operation unit 41a that can be easily handled from the remote control operation unit 25x and is used only in the case of emergency unlocking can be arranged in an unobtrusive part.

As a structural concept, as shown in FIG. 11, the first transmission mechanism X is interposed between the intermediate output shaft 23a and the lock body 3x, and the second transmission mechanism Y is interposed between the key operation unit 41a and the lock body 3x. Since the mechanical parts of these transmission mechanisms X and Y are arranged in parallel to the lock body 3x, the assembly is easy and the clutch CL1 and the intermediate output shaft are added to the existing manual locking / unlocking device. 23a etc. can be added to give an electric locking / unlocking function, or a clutch CL2 or key operation unit 41a can be added to an existing electric locking / unlocking device to give a manual locking / unlocking function. It becomes.

Of course, from the standpoint of providing such a drive format alone, the type of drive source is not limited as long as the electric input unit and the manual input unit can be arranged in parallel so that they can be driven without affecting each other. Therefore, instead of using a lock-type alternate type latch mechanism or the like, it is possible to use a drive source of a type that has a backward movement structure such as a solenoid and that holds the drive position by itself. In the above embodiment, the output from the drive source is output to the intermediate output shaft 23a, which is an electric input unit, via the reduction mechanism or the like, while the stepping motor 22 as the drive source is output directly. Alternatively, the output shaft of the electric power source itself may be used. On the other hand, the manual input unit is the key operation unit 41a of the cylinder lock 41 in the above embodiment, but other types of operation units may be used, or the manual input unit may be manually operated via a conversion mechanism or the like. The operating force may be transmitted to the expression input unit. In the one-way clutches CL1 and CL2, various structures can be adopted as long as the reverse drive of the electric input unit and the manual input unit can be cut off.

And as an effect common to all the above-mentioned viewpoints, in this embodiment, since the lock body 3x is arranged in the vicinity of the rear end of the drawer 12 to constitute the locking / unlocking device 3, the operation sound does not matter. An unauthorized unlocking operation can be effectively prevented by positioning the lock body 3x in a portion of the drawer 12 that is difficult to access.

In addition, since the mechanism parts of the drive system and the manual operation system are accommodated in the unit cases 5 and 6 and arranged in the drawer 12, the bracket 14 having the engaged portion 14b is attached to the desk body side. It is possible to easily add the locking / unlocking device 13 to the desk 1 later.

In particular, the bracket 14 has a base end portion 14m supported by a leg 11 that supports the top plate 13, and a distal end portion 14n extending along the lower surface of the top plate 13 so that the engaged portion is engaged with the distal end portion 14n. 14b is formed so that attachment is easy, and the distal end portion 14n is closely inserted into the gap between the drawer 12 and the top plate 13 during locking, so that it is possible to effectively prevent unauthorized removal operations and the like. It becomes possible.

The specific configuration of each unit is not limited to the above-described embodiment. For example, in the above embodiment, as shown in FIG. 11, the intermediate output shaft 23a that is an electric input unit and the key operation unit 41a that is a manual input unit together with their transmission mechanisms X and Y in the width direction of the drawer 12. They are assembled on one end side and connected to the lock body 3x through mechanical one-way clutches CL1 and CL2, respectively, and share some mechanical parts. As shown in FIG. The intermediate output shaft 23a is provided on one end side in the width direction of the drawer 12 together with the first transmission mechanism X, and the key operation portion 41a which is a manual input unit is connected to the other end side in the width direction of the drawer 12 together with the second transmission mechanism Y. You may make it provide in corners.

13 to 15 show specific examples of the configuration. The desk 1 incorporates an electric drive device 2 in a unit case 5 arranged on one end side in the width direction of the drawer 12 and a manual operation unit 4 in a unit case 6 arranged on the other end side. . That is, the unit case 5 accommodates the mechanical parts shown in FIG. 2 with the cylinder lock 41 removed. On the other hand, in the unit case 6, as shown in FIGS. 14 and 15, in addition to the lock element 31, the drive link having the rear end connected to the drive piece 31c of the lock element 31 in the same manner as the drive link 32. 32, an operating link 132 longer than 32, a cylinder lock 141 attached in a state in which a key operation portion 141a as a manual input portion is exposed on the front surface of the end plate of the drawer 12, and a dead bolt 142 of the cylinder lock 141 And a cam 143 for transmitting the movement to the operation link 132. The cam 143 is pivotally attached to a support shaft n3 extending in the width direction of the top plate 13, and a portion displaced substantially downward from the support shaft n3 is attached to the front end side of the operation link 132 via the support shaft n4. At the same time, pins 143a and 143b extending in the width direction of the top plate 13 are projected from a portion displaced forward from the support shaft n3, and between these pins 143a and 143b, from a portion displaced from the axis of the cylinder lock 141. The dead bolt 142 projecting rearward is inserted and engaged.

That is, when the key K is inserted into the key operation unit 141a and rotated, the dead bolt 142 starts rotating around the portion displaced from the axis of the cylinder lock 141, and as a result, the height position changes. When the dead bolt 142 is positioned below, the engagement portion 31b of the lock element 31 constituting the lock body 3x is disengaged from the engaged portion 14b on the top plate 13 side as shown in FIG. When the dead bolt 142 moves upward, the pin 143a is urged upward to rotate the cam 143 around the support shaft n3 as shown in FIG. The link 132 is moved forward to move the lock body 31 to the locking position P where the engaging portion 31b of the lock element 31 is engaged with the engaged portion 14b on the top plate 13 side.

As shown in FIG. 16, the key operation unit 141a is covered with a resin cover 144 that can be slid when not operated, and this resin cover 144 has the same appearance as the resin cover 25a of the right light receiving unit 25. Presents.

In this way, the lock body 3x is provided with a pair of lock elements 31 arranged at a separated position via the interlocking shaft 3a which is a synchronization mechanism, and the intermediate output shaft 23a is coupled with the first transmission mechanism X to the right lock. On the element 31 side, the key operation portion 41a is provided with a corner on the left lock element 31 side together with the second transmission mechanism Y, so that it is possible to use either electric or manual operation while avoiding concentration of mechanical parts locally. The function of the present invention that enables the operation can be effectively secured.

In particular, the light receiving unit 25 that receives an operation signal to the intermediate output shaft 23a and the key operation unit 141a that receives the operation force to the operation unit 4 are covered with resin covers 25a and 144, respectively, so that the left and right ends of the end plate of the drawer 12 are covered. Therefore, an appropriate operating position can be secured without deteriorating the furniture.

Furthermore, the shape of various parts such as cams and links and the method of connecting the links are not limited to the above embodiment, and other methods such as the movement of the cylinder lock and the structure of the drawer locking / unlocking device are also available. It can be according to various aspects.

In short, regarding the invention relating to the combination of the drive source and the latch mechanism, the drive source rotates only by a predetermined angle (for example, 360 °) in the same direction, whereby the latch mechanism is turned on / off. Can be held in two positions, the specific configuration of each part can be variously modified without departing from the spirit of the present invention.

In addition, regarding the invention related to the juxtaposition of the electric input unit and the manual input unit, it is possible to operate the lock body in the locking / unlocking direction by any of these, and from one input unit using a one-way clutch or the like. As long as the other input unit can be configured not to be reversely driven at the time of input, the specific configuration of each unit can be variously modified without departing from the spirit of the present invention.

1 is a perspective view of a desk to which an embodiment of the present invention is applied. The perspective view of the unit case which accommodated the drive device and operation part in the embodiment. The perspective view of the unit case which accommodated only the lock main body in the embodiment. The exploded view of FIG. FIG. 3 is an operation explanatory diagram of the drive device according to FIG. 2. The same top view of FIG. FIG. 6 is an operation explanatory diagram of the driving device corresponding to FIG. 5. FIG. 7 is an operation explanatory diagram of the drive device corresponding to FIG. 6. Action | operation explanatory drawing at the time of a lock main body being driven from a drive device. Explanatory drawing at the time of operating a lock main body from an operation part. The conceptual block diagram of the embodiment. The block diagram corresponding to FIG. 11 which shows the modification of this invention. The perspective view corresponding to FIG. 1 which shows the modification of this invention. The perspective view which shows the structure of an operation part. Action | operation explanatory drawing of the operation part. The perspective view which shows the structure of a manual input part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Desk 2 ... Drive device 2a ... Drive mechanism 3 ... Locking / unlocking device 3a ... Synchronous mechanism (linkage axis)
3x ... lock body 4 ... operation part 10 ... horizontal member 11 ... leg 11a, 11b ... leg column 12 ... drawer 13 ... top plate 14b ... engaged part 21 ... latch mechanism 22 ... drive source (stepping motor)
23a ... Electric input unit (intermediate output shaft)
25. Light receiving unit 31. Locking element 41 a. Manual input unit (key operation unit)
CL1, CL2 ... One-way clutch P ... Locking position Q ... Unlocking position T ... Switching point X ... First transmission mechanism Y ... Second transmission mechanism

Claims (7)

A lock main body is selectively engaged with an engaged portion by a driving device to perform locking and unlocking of the drawer, and the driving device includes a lock-type alternate type latch mechanism having an on / off state, A drive mechanism that repeatedly performs an operation in the same direction on the drive source each time an input is made, and switches the on / off state of the latch mechanism by the operation, and is locked when the latch mechanism is associated with the latch mechanism and is on. A desk comprising: a lock body that moves to a position and moves to an unlocked position when in an off state; and the drive device is arranged in a drawer. The latch mechanism operates horizontally in the drawer, and the lock body moves between the unlocked position located in the drawer and the locked position where it rises upward and engages the engaged part provided on the bottom side of the top plate. The desk according to claim 1, which is configured to do so. 3. The desk according to claim 2, wherein at least the weight of the lock body is set so as to act in a direction opposite to the direction toward the switching point with respect to the latch mechanism. Legs that support the top plate are connected between the front and rear leg struts and the left and right leg struts on the rear end side with a horizontal member, and the front end side of the left and right leg struts on the front end side is opened The desk according to claim 2 or 3, wherein the drawer is disposed so that the opened portion is substantially within the thickness of the horizontal member. The desk according to any one of claims 1 to 4, wherein the drawer is disposed on the lower surface side over substantially the entire width direction of the top plate. At least the drive system is housed in the unit case and placed in the drawer, and a bracket is attached to the desk body. The bracket is supported by a leg that supports the top plate at the base end, and the distal end is The desk according to any one of claims 1 to 5 , wherein the desk is extended along a lower surface of the top plate and the engaged portion is formed at a tip portion thereof . The lock main body is selectively engaged with the engaged portion by the locking / unlocking device to perform the locking / unlocking of the drawer, and the locking / unlocking device includes an electric input unit and an electric input unit. A lock body that operates between an unlocked position and an unlocked position by an input driving force; and a manual input unit for moving the lock body between the locked position and the unlocked position by an external operation force. In this case, the electric input unit and the manual input unit are associated with the lock body so that the electric input unit and the manual input unit can be operated without reversely driving the other party , and this locking / unlocking device is arranged in the drawer and is at least driven. The system is housed in the unit case and placed in the drawer, and a bracket is attached to the desk body. This bracket is supported by the leg that supports the top plate, and the front end is along the bottom surface of the top plate. Extend to the tip of the cover. Desk, characterized by forming the engaging portion.

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