JP2014020048A - Power conversion device for lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power conversion device for a lock, which converts an operation force of an outside handle into an appropriate output and transmits it to an operation member of a lock part.SOLUTION: In a power conversion device X for a lock, a pedestal member for an outside handle is fixed on one wall surface of a door 1, a lock is provided in the door, and a conversion case 11 is fixed on the door so as to be interposed between the lock and the pedestal member for the outside handle. The power conversion device for the lock includes: a handle cam 12A rotatably supported to the conversion case and rotated by a predetermined amount by operation force of the outside handle; a slider 14 engaged with a drive arm 12b of the handle cam and moved in the vertical direction of the conversion case by drive force of the handle cam against spring force of a return spring 13; and an interlock cam 22 with an engaging arm engaged with the slider, rotatably supported to the conversion case so as to interlock with the handle cam, and rotated larger than at a rotation angle of the handle cam when the outside handle is operated.

Description

  The present invention relates to a power converter for a lock, and more particularly to a power converter for a lock disposed at a free end of a door as a fitting.

  In order to obtain the convenience that the lock-side cam does not need to change the rotation angle even if the operation angle of the handle of the box lock is made small (the subject of the invention), The hub (handle cam) is a hub 42 having a two-part structure composed of a primary hub 43 and a secondary hub 44, and the eccentric shaft 49 and the handle H are attached to the primary hub 43 that is rotatably fitted to the case. A fitting hole 48 is provided, and a secondary hub 44 that is rotatably fitted to the case is inserted into a shaft insertion hole 52 into which the eccentric shaft 49 is inserted, and a pushing movement that pushes the pushed portion 39 of the retractor 21. The portion 20 is provided, and the distance from the center of rotation of the secondary hub 44 to the shaft insertion hole 52 is smaller than the distance from the center of rotation of the primary hub 43 to the eccentric shaft 49. " As described in).

  Although the door lock device of Patent Document 1 has an advantage that the number of members for converting the power on the handle side can be reduced, each fitting hole 48 of the primary hub 43 and the secondary hub 44 as a conversion member, Since 53 is located on a single-core shaft, the position of the cam on the lock side is limited. That is, the position of the lock side cam cannot be determined freely. Further, since it is necessary to fit the eccentric shaft 49 eccentric from the center hole (fitting hole) 48 of the primary hub 43 into which the angular shaft of the handle is inserted into the insertion hole 52 of the secondary hub 44, In order to sufficiently rotate the operating body and the like, it is necessary to precisely shape the sliding surface 50 of the secondary hub 44, the distance between the insertion hole 52 and the fitting hole 53, the diameter of the fitting hole 53, and the like. There is a problem.

  Patent Document 2 is a lock device that is applied to an opening / closing body (panic door) of a safety fence of a station platform. The locking device described in Patent Document 2 is a rocker in which a cam shaft 8 that is rotatably supported by a main body case 2 at a free end of an opening / closing body 1 and a guide protrusion 9 a at an intermediate portion inserted into a longitudinal slot 2 a of the main body case 2. A link mechanism comprising a moving link 9, a slide link 11 in which a guide pivot 11 a at the base end is inserted into the longitudinal slot 2 a, and a relay link 10 that connects the swing link 9 and the slide link 11, The eccentric protrusion 8a is expanded and contracted by the vertical movement of the slider 7 fitted in the horizontally long slot 7c, and the locking rod 12 is advanced and retracted to the locked position.

  A panic lever 6 is provided on the inner wall of the opening / closing body 1 on the train side. When the panic lever 6 is pushed down in an emergency, the slider 7 moves downward. As a result, the camshaft 8 and the link mechanism are moved. Then, the locking rods 12 and 12 in the vertical direction are moved in the unlocking direction (reference numerals are those described in Patent Document 2).

  However, since the lock device for the panic door of Patent Document 2 uses a link mechanism, there are problems such as a complicated configuration and incompatibility with a hotel guest room door.

  Patent Document 3 discloses an exit device 10 that can be applied to a door of a hotel guest room. FIG. 1 of Patent Document 3 shows left and right support plates 13 and 13 fixed to the inner wall surface of a passenger door, a horizontally long case 12 integrally provided between the support plates, and a wall surface of the case. A panic bar (a long plate in the drawing) provided with a gap between them, a key cylinder 50 provided at one end of the panic bar, and a breaker connected to the output shaft of the key cylinder 50 A cam 52 and a dead bolt 30 that moves backward by the rotational force of the breaker cam 52 are described. A specific configuration for moving the dead bolt 30 backward is disclosed in FIG.

  By the way, the lock part of the guest room is provided with a handle unit (a base, a case, a power source, a drive source, a lock mechanism, etc.) on the outer wall surface of the door of the guest room, and on the other hand, In general, inside and outside of the door, handles inside and outside are provided separately from the lock body (lock box) of the lock portion. However, in some foreign countries, as shown in FIG. 1 of Patent Document 3, a panic bar may be provided together with the inner handle or instead of the inner handle.

  Thus, for example, in the case of an embodiment in which a panic bar is provided, in order to move the dead bolt 30 backward, a bell crank (rotating body) 22 that engages with an engaging protrusion of the dead bolt 30 is attached to the outer handle. It is necessary to make it larger than the rotation amount. The same applies to the case where the dead bolt 30 is moved backward by thumb-turn picking. Thus, when the amount of rotation of the inner and outer power transmission means is different, it is necessary to convert the operating force of the outer handle into an appropriate output and transmit it to the operating member of the lock portion.

JP-A-11-280321 JP 2001-233198 A US 6,409,232 B1

(A) Locking bolts such as latch bolts and dead bolts can be completely returned to the lock box via a retractor or dharma in the lock box even when the operating angle of the outer handle is small. Another problem is to solve the problem of Patent Document 1.
(B) The purpose of (a) can be achieved by reducing the number of parts as much as possible.
(C) By providing the conversion case separately from the pedestal member for the outer handle or the lock, the pedestal member (for example, the handle case) can be manufactured as thin as possible, or the configuration of the lock is not complicated. It will be over.
(D) The outer handle can be indirectly locked through the handle cam, for example, by remote control.
(E) For example, the lock provided on the inner wall surface of the door is provided with a panic bar, and the interlocking cam is rotated by the operating force of the panic bar so that the lock bolt on the lock can be completely returned to the lock box. is there.
(F) As another object, a lock having a lock bolt and a handle unit (base, case, power source, drive source, lock mechanism, etc.) having an operation handle are separate door lock devices, and the operation handle The operation force can be converted into an appropriate output so as to be adapted to the operating member of the lock portion and transmitted to the operating member of the lock, and can be adapted to the door of the hotel guest room.

  A power converter for a lock according to the present invention is a base member for an outer handle fixed to one wall surface of a door, a lock provided on the door, and is interposed between the lock and a base member for the outer handle. In this way, the lock power conversion device having the conversion case fixed to the door is a handle that is rotatably supported by the conversion case and rotates by a predetermined amount by the operating force of the outer handle. A cam, a slider that engages with the drive arm of the handle cam, moves in the vertical direction of the conversion case by the drive force of the handle cam and against the spring force of the return spring, and the engagement arm is engaged with the slider. And an interlocking cam that is rotatably supported by the conversion case so as to be interlocked with the handle cam and that rotates more than the rotation angle of the handle cam when the outer handle is operated. Characterized in that it obtain.

  Further, the lock power conversion device of the present invention is a base member for an outer handle fixed to one wall surface of the door, a lock provided on the door, and interposed between the lock and the base member for the outer handle. In this way, the lock power conversion device having a conversion case fixed to the door, the lock power conversion device is rotatably supported by the conversion case and rotates by a predetermined amount by the operating force of the outer handle. A gear, a rack that meshes with the main driving gear, moves in the vertical direction of the conversion case by the driving force of the main driving gear and against the spring force of the return spring, and engages with the rack, and the main driving gear A driven gear or interlocking gear that is separately and independently supported by the conversion case so as to be interlocked with the main driving gear and that has a larger rotation amount than the main driving gear when the outer handle is operated. Characterized in that it comprises a.

  The shaft hole of the drive member (for example, the handle cam) that rotates at the shaft portion of the outer operation member, and the shaft hole of the drive member and the shaft hole of the interlock member (for example, the interlock cam) that receives the drive force of the drive member are coaxial. Even when the operating angle of the outer handle is not, the operating force of the outer handle can be converted into an appropriate output and transmitted to the actuating member of the lock portion. The amount of movement or rotation of the lock actuating member (eg, retractor, dharma, etc. in the lock box) can be increased via an interlocking cam that is rotatably mounted on the case.

  Moreover, since no link mechanism is used, the number of parts can be reduced as much as possible. Furthermore, depending on the embodiment, since the pedestal member and the conversion case are separate members, the pedestal member can be manufactured as thin as possible. Alternatively, since the lock and the conversion case are separate members, the conversion member is incorporated into the conversion case. The configuration can be simplified. In the case where the control unit for controlling the locking device for the outer handle is provided in a hotel management room, for example, the outer handle can be locked via the handle cam by remote control. . Further, the lock provided on the door can rotate the interlock cam with the operating force of the panic bar, for example, and the lock bolt of the lock can be completely returned into the lock box. In addition, even if the lock provided with the lock bolt and the handle unit provided with the operation handle are separate door lock devices, the operation force of the operation handle is converted into an appropriate output to the operation member on the lock side. Can communicate.

FIGS. 1 to 11 are explanatory views showing a first embodiment of the present invention, FIGS. 12 and 13 are explanatory views showing a second embodiment of the present invention, and FIGS. 14 and 15 are third embodiments of the present invention. It is each explanatory drawing and figure which show a form.
The perspective view which shows an example of the usage condition of this invention. The cross-sectional schematic explanatory drawing from planar view. The longitudinal section schematic explanatory drawing from the mouth end side. The schematic explanatory drawing from the front view side which considered the handle lock device. Explanatory drawing of the main member of the power converter device for locks. Explanatory drawing of the main member which comprises the power converter device for locks. The perspective view which shows an outer side handle | steering-wheel and the power converter device for locks. The perspective view which shows thumbturn picking or / and a panic bar, and the power converter device for locks. Explanatory drawing which shows the locking bolt of the lock separately from the power converter device for locks, and this power converter device. Explanatory drawing which shows the operating state of the power converter device when operating an outer side handle. (A) is an initial state of the handle cam 12, and (b) is a state in which the handle cam 12 is rotated by a predetermined amount. Explanatory drawing which shows the action | operation state when operating a thumb turn picking or a panic handle. (A) is an initial state of the interlocking cam 22, and (b) is a state where the interlocking cam 22 is rotated by a predetermined amount. At this time, the handle cam 12 does not move. The schematic explanatory drawing of the principal part which shows 2nd Embodiment. Schematic explanatory drawing which shows the operation state of FIG. The schematic explanatory drawing of the principal part which shows 3rd Embodiment. Schematic explanatory drawing which shows the operation state of FIG. Explanatory drawing when operating an example of an inner side operation member.

  Hereinafter, the first embodiment will be described in detail with reference to the drawings. FIG. 1 is a perspective view of a use mode of the present invention. In this figure, first, a door 1 is provided as a fitting, for example, at a doorway of a hotel guest room. Of course, the door 1 is not limited to a hotel guest room. One vertical wall surface visible on the front side is the outer wall surface 1a of the door (outside the guest room). On the other hand, the other vertical wall surface that cannot be seen on the opposite side is the inner wall surface 1b of the door.

  1c is a free end portion of the door, and an opening 1d is formed at the center of the free end portion 1c. The door 1 opens and closes in the horizontal direction via a hinge on the side of the mounting end.

  Next, 2 is a handle unit disposed on the outer wall surface 1 a of the door 1. The handle unit includes, for example, a unit case 2a having a pedestal function for a handle, a card reader (not shown) incorporated in the unit case 2a, a control unit for controlling information read by the card reader, and control of the control unit An information control device 2b configured with an output unit for outputting information, and an outer handle (in this embodiment, an L-shaped lever handle) as an outer operation member having a shaft portion fitted in the shaft hole of the unit case 2a ) 2c, and an insertion port (or insertion port) 4 into which a card key (information medium) 3 having cabin identification information can be inserted is provided at the upper end of the unit case 2a.

  Next, reference numeral 5 denotes a lock portion (lock) disposed on the inner wall surface 1b of the door 1. The lock box 5a before the lock is provided with a lock bolt retracting mechanism 5b shown in FIG. The lock bolt 5c such as a latch bolt and a dead bolt moves forward and backward in the horizontal direction by the operation of the bolt retracting mechanism (lock operating member) 5b.

  6 (6a, 6b) is a thumb turn knob 6a or / and a panic bar 6b (see FIG. 8) as an inner operation member disposed on the inner wall surface 1b of the door 1. In this embodiment, the thumb turn knob 6a It is provided directly or indirectly on the outer wall surface of the lock box 5a. When the thumb turn knob 6a is rotated by a predetermined amount (for example, approximately 90 degrees), the lock bolt 5c can be completely retracted into the lock box 5a via the lock actuating member 5b.

  Next, X is a lock power converter which is a main part of the present invention, and in this embodiment, the lock power converter X is housed in the opening 1d of the free end 1c of the door. That is, as shown in FIGS. 1 to 3, a base member 2a for an outer handle fixed to one wall surface of the door, a lock 5 provided on the other wall surface of the door 1, and the lock and the base It is comprised by the conversion case 11 which interposes between the members 2a (it is located in the opening part 1d), and accommodates the main members (refer FIG. 5) of the power converter device for locks.

  Here, with reference to FIG. 4 thru | or FIG. 8, the main members of the power converter device X for locks are demonstrated. FIG. 4 is a schematic explanatory view from the front view side including the handle lock device Y, and FIG. 5 is an explanatory view of main members of the lock power converter. In these drawings, reference numeral 11 denotes the above-described conversion case. The conversion case 11 is composed of a case main body 11a having a front and a lid 11b for closing a side wall opening of the case main body 11a. The conversion case 11 is appropriately formed with a shaft through hole, a guide member mounting hole, a locking bolt guide window, and the like.

  Reference numeral 12 denotes a handle cam as a drive member. The handle cam 12 is rotatably supported at the center of the conversion case 11 and rotates by a predetermined amount by the operating force of the outer handle 2c (for example, 30 degrees, 35 degrees). 40 degrees).

  Thus, the handle cam 12 includes a hub portion 12a into which the angular shaft (shaft portion) 2d of the outer handle is fitted, a drive arm (drive portion) 12b extending radially outward from the hub portion 12a, and this drive. It comprises an engaging portion 12c that protrudes in the shape of a finger in the radially outward direction on the opposite side of the arm 12b. FIG. 7).

  Reference numeral 14 denotes a slider, which engages with the drive arm 12 b of the handle cam 12, and is converted by the drive force of the handle cam 12 and against the spring force of the return spring 13 provided in the conversion case 11. In the vertical direction (downward in the embodiment).

  For example, referring to FIG. 7, the slider 14 is a vertically long plate, and vertical guide long holes 15 and 15 are formed in the upper and lower ends of the vertical plate portion 14a. In addition, a receiving portion 14 b that protrudes outward from one side surface is provided at the center of the slider 14. In the present embodiment, the receiving portion 14b includes an engaging portion 16 having a mountain shape on the upper surface that engages with the drive arm 12b described above, and a spring end support portion 17 that houses one end (upper end) of the return spring 13; Have Reference numeral 18 denotes an engaged portion (engagement groove, engagement hole, notch, etc.) for the interlocking cam formed in a portion near the upper end of the vertical plate portion 14a or in the center. A spring receiver 19 supports a lower end portion of the return spring 13 disposed along the rear wall of the conversion case 11. Reference numeral 20 denotes a pair of guide pins as guide means that engage with the upper and lower vertical guide slots 15, 15.

  Lastly, 22 is an interlocking cam provided above (below this embodiment) or below the handle cam 12, and this interlocking cam 22 is a hub into which a conversion shaft (output shaft) 23 having a square cross section or a different diameter is fitted. A portion 22a, a short hook-like engagement arm 22b extending radially outward from the hub portion 22a, a horizontal projection from the side wall of the engagement arm 22b, and the engagement portion 18 of the slider 14 As shown in FIG. 6, the distance a from the rotation center of the interlock cam 22 to the tip of the engagement arm 22b is the distance a from the rotation center of the handle cam 12 to the tip of the drive arm 12b. Shorter than the distance b.

  In other words, the interlocking cam 22 is engaged with the engaged portion 18 of the slider 17 and the engaging arm 22b is independent of the handle cam 12, and the conversion case is interlocked with the handle cam. 11 and is rotated more than the rotation angle of the handle cam when the outer handle 2c is operated (for example, 70 degrees, 80 degrees, 90 degrees, etc.).

  Here, with reference to FIG. 4, the handle lock device Y which is an additional requirement will be briefly described. The handle lock device Y includes, for example, a control unit 31 disposed on the management room side of a hotel, a drive source (drive motor) 32 controlled by the control unit 31, and a latch that operates by the driving force of the drive source. The drive source 32 is provided horizontally in the conversion case 11. Further, the lower end portion of the locking piece 33 that intersects the drive source 32 is engaged with and disengaged from the finger-like engagement portion 12 c of the handle cam 12. The conversion case 11 is provided with a power source (battery) 34 for the handle lock device Y.

  Next, FIG. 9 is an explanatory view showing the lock power converter X and the lock bolt 5c of the lock separate from the power converter, and FIG. 10 shows the operating state of the power converter when the outer handle is operated. FIG. 11 is an explanatory view showing an operating state when the thumb turn knob 6a or the panic handle 6b is operated.

  As described above, the locking bolt 5c shown in FIG. 9 is provided not in the conversion case 11 but in the lock box 5a. FIG. 10 is an explanatory view in which the lock bolt 5c is completely retracted into the lock box 5a when the outer handle 2c is operated. In the initial state of FIG. 10A, the locking bolt 5c protrudes completely from the lock box 5a. The return spring 13 is extended. The drive arm 12b of the handle cam 12 as a drive member is located on the upper right side of the center of the angular axis 2d. Further, the engaging pin 22c of the engaging arm 22b of the interlocking cam 22 as the interlocking member is located on the upper right side of the center of the conversion shaft (output shaft) 23 similarly to the driving arm 12b of the handle cam 12. The operation portion of the outer handle 2c is in a horizontal state.

  On the other hand, FIG. 10B shows a state where the operation portion of the outer handle 2c is pushed down by a required amount. When the outer handle 2c is operated, the operating force is transmitted to the slider 14 via the drive arm 12b and the receiving portion 14b, and the slider 14 moves downward as indicated by the arrow against the spring force of the return spring 13. Therefore, the return spring 13 contracts. At this time, the interlock cam 22 rotates in the same direction as the handle cam 12 with a slight delay or depending on the design depending on the design, but in this embodiment, the engaging arm 22b from the center of rotation of the interlock cam 22 is rotated. The distance a to the tip (engagement pin in the embodiment) is shorter than the distance b from the center of rotation of the handle cam 12 to the tip of the drive arm 12b (tip portion in the embodiment). When rotating 30 degrees, 40 degrees, etc., the interlocking cam 22 rotates 70 degrees, 90 degrees, etc. Thus, the operating force of the outer handle 2c can be converted into an appropriate output by the lock power converter X.

  Another embodiment of the present invention shown in FIGS. 12 to 15 will be described. In the description of other embodiments, the same parts as those in the first embodiment are denoted by the same or similar reference numerals, and redundant descriptions are omitted.

  12 and 13 are explanatory views showing a second embodiment of the present invention. The second embodiment is mainly different from the first embodiment in that a vertically long spring receiving member 25 is fixedly provided along the rear wall of the conversion case 11, and on the front side of the spring receiving member 25. A vertical wall 25a, an arc-shaped guide slot 26 is formed in an unnumbered vertical wall opposite the vertical wall, and a horizontal column having a stopper function and a case lid mounting function at the upper end of the spring receiving member 25 27, the spring receiving member 25 is formed in a case shape, and the distal end portion (driving portion) of the driving arm 12b of the handle cam 12 is located outside the vertical wall 25a of the case-like spring receiving member 25. A drive pin 28 is provided at the tip of the drive arm 12b. The drive pin 28 is inserted into the arc-shaped guide slot 26 and the slider 14 that has entered the case-like spring receiving member 25 is inserted into the case-like spring receiving member 25. Protruding receiving part The point through the through hole 29 of 4b, the case-like spring receiving member 25 is provided with a cap-like urging body 30 fitted to the upper end of the return spring 13, and the case-like spring receiving member 25 The return spring 13 housed inside is a point that expands and contracts via the biasing body 30 that presses against the drive pin 28 of the drive arm 12b. This second embodiment is of an implementation level, and has an advantage that the biasing means 13 and 30 are operated smoothly.

  14 and 15 are explanatory views showing a third embodiment of the present invention. This third embodiment is a design change to avoid the first embodiment. In these drawings, reference numeral 12A denotes a main driving gear as a driving member, and the main driving gear 12A corresponds to a handle cam. Reference numeral 12b denotes a drive tooth 12b formed in an arc shape in a drive portion connected in a fan shape to the hub portion 12a. The drive tooth 12b corresponds to the tip of the drive arm 12b. 14A is a rack that is synchronized with the main driving gear 12A, and this rack 14A is engaged with (engaged with) the drive teeth 12b and is engaged with the first engaging teeth 14b (downward) and the driven gear 22A ( And the other (upper) second engaging teeth 18 to be engaged with each other. This rack 14 </ b> A corresponds to the slider 14. Reference numerals 5b and 5c are constituent members of the lock portion.

  Therefore, the lock power converter X1 of the third embodiment meshes with the main drive gear 12A, which is rotatably supported by the conversion case 11 and rotates by a predetermined amount by the operating force of the outer handle 2c, A rack 14A that moves in the vertical direction of the conversion case 11 by the driving force of the main driving gear 12A and against the spring force of the return spring 13, and engages with the rack 14A and is independent of the main driving gear 12A. In addition, the driven gear (or the first embodiment) is rotatably supported by the conversion case 11 so as to be linked to the main driving gear, and has a larger rotation amount than the main driving gear 12A when the outer handle 2c is operated. Interlocking cam) 22A.

  FIG. 16 is an explanatory diagram when an example of the inner operation member is operated. The inner operation member 6 is an eaves-like panic bar 6b (see FIG. 8). The panic bar 6b is pivotally supported by a vertical shaft 41 on which a long mounting substrate 40 is erected on the left side of the drawing, while a bent free end portion 42 is provided on the lock box 5a. It is possible to press against one end surface of the fan-like engagement portion 44a of the first operating plate 44 that is rotatably supported by the vertical shaft 43. When the panic bar 6b is pushed in by hand, the panic bar 6b approaches the arrow direction (lock box 5a side) against the spring force of a spring member (not shown). That is, when the panic bar 6b is pushed in the arrow direction, the free end portion 42 presses the end surface of the fan-like engagement portion 44a, so that the first operating plate 44 rotates in the arrow direction about the vertical shaft 43. Then, the second operating body 45 having the conversion shaft 23 provided in the lock box 5a rotates. At this time, the other end surface of the fan-like engaging portion 44a of the first operating plate 44 abuts against the end surface of the protruding portion 45a of the second operating body 45. As a result, the lock operating member (for example, thumb turn dharma) cooperating with the conversion shaft 23 rotates, and the lock bolt 5c moves backward into the lock box 5a.

  The present invention is used in the fields of locks and joinery.

X, X1 ... Power converter for lock, 1 ... Door, 2 ... Base member (handle unit), 2c ... Outer handle, 5 ... Lock, 6 ... Inner operation member, 11 ... Conversion case, 12, 12A ... Drive member ( Handle cam, main drive gear), 12b... Drive part (drive arm, drive tooth), 13... Return spring, 14... Slider, 14A.

Claims (6)

A pedestal member for an outer handle fixed to one wall surface of the door, a lock provided on the door, and a conversion case fixed to the door so as to be interposed between the lock and the pedestal member for the outer handle. A power converter for a lock, wherein the power converter for a lock is rotatably supported by the conversion case and rotated by a predetermined amount by the operating force of the outer handle, and a drive arm of the handle cam; The slider is engaged and moved in the vertical direction of the conversion case by the driving force of the handle cam and against the spring force of the return spring, and the engaging arm is engaged with the slider and is interlocked with the handle cam. And a power conversion device for a lock including an interlocking cam that is rotatably supported by the conversion case and that rotates larger than a rotation angle of the handle cam when the outer handle is operated. 2. The power conversion for a lock according to claim 1, wherein the distance from the rotation center of the interlock cam to the tip of the engaging arm is shorter than the distance from the rotation center of the handle cam to the tip of the drive arm. apparatus. The lock case according to claim 1 or 2, wherein the conversion case is fitted into the opening of the free end portion of the door as a fitting, and the lock is fixed to the other wall surface of the door. Power converter. 2. The conversion case according to claim 1, wherein a drive source controlled by the control unit is disposed in the conversion case, and the locking piece is operated by the driving force of the drive source to lock the handle cam, or the locking thereof. A power conversion device for locks, characterized in that 2. The lock according to claim 1, wherein the lock provided on the door includes a panic bar, and the interlocking cam is rotated via an operating member that is operated by an operating force of the panic bar, so that the lock bolt of the lock is completely contained in the lock box. A power conversion device for locks, wherein A pedestal member for the outer handle fixed to one wall surface of the door, a lock provided on the door, and a conversion case fixed to the door so as to be interposed between the lock and the pedestal member for the outer handle. A power converter for a lock, wherein the power converter for a lock is rotatably supported by the conversion case and rotated by a predetermined amount by the operating force of the outer handle, and meshes with the main gear, A rack that moves in the vertical direction of the conversion case by the driving force of the main driving gear and against the spring force of the return spring, and engages with the rack, is independent of the main driving gear, and interlocks with the main driving gear. Thus, a power conversion device for a lock comprising a driven gear or an interlocking cam that is rotatably supported by the conversion case and has a larger amount of rotation than the amount of rotation of the main drive gear when the outer handle is operated.

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