JP2008144450A - Display device of door lock tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device of a door lock tool, which is good in appearance by avoiding protrusion thereof on the outside of a door to a possible extent, facilitates mounting thereof on the door, and always correctly performs display of switching between a locking state and an unlocking state of the door. <P>SOLUTION: According to the display device B of the door lock tool, a rotating shaft 14 having a pinion 15 in mesh with a rack 20 screwed on a lock bar 11, has a small gear 25 arranged at a distal end thereof, and a rotary display body 30 has an internal gear 35 arranged therein, which is in mesh with the small gear in the same plane. The internal gear and the small gear cooperatively form a reduction gear mechanism G for reducing the speed of the rotary display body with respect to a sliding stroke of the lock bar 11 to a half rotation or less. Then the rotary display body inclusive of the reduction gear mechanism is stored in a flat display case 40 and rotatably held. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is installed on a toilet door in a lavatory booth, etc., and is a sliding door lock device that locks and unlocks the door by sliding a lock bar from the inside of the door. The present invention relates to a display device for a door lock that displays a state from the outside.

  In general, as shown in FIG. 10, this type of door lock device with a display device includes an inner lock means a in which a lock bar 2 is slidably engaged with an attachment body 1 fixed to a door D, and a handle. When the door D is sandwiched between the external display device which also serves as the door D, the lock bar 2 is slid and the door D is locked and unlocked from the inside, the sliding of the lock bar 2 is performed with the rack 3 and the pinion provided in the lock means a. 4 is converted into a rotational movement by meshing with 4, the rotation is transmitted to the outer rotation display body via the rotation shaft 5, and the doors are unlocked from the display window by switching different display sections of the rotation display body, that is, It is structured to display the use / non-use status of toilets.

  Moreover, in the conventional door lock device, in particular, the rack 3 that is screwed to the lock bar 2 side is provided with the display switching gear portion 3a in the middle portion in the longitudinal direction and the emergency solution provided on both sides in the longitudinal direction of the gear portion 3a. The display switching gear portion 3a is divided into the lock gear portions 3b and 3c, and in particular, when the pinion 4 is rotated by the rack 3 by sliding the lock bar 2, the pinion 4 is rotated. The emergency unlocking gear portions 3b and 3c have different installation height positions from the display switching gear portion 3a, and thereby the groove portion of the lock bar 2 is formed. It is formed at a position near the bottom surface 2a. Normally, the rotating shaft 5 having the pinion 4 at the shaft base end is urged toward the groove bottom surface 2a side of the lock bar 2 by a positioning urging spring (not shown), and the pinion 4 is switched to the display switching gear portion 3a. It is structured to be positioned and supported at a height position where it can be meshed with.

  Therefore, when the lock bar 2 is reciprocally slid in the normal state, the door D is locked and unlocked accordingly. At the same time, when the rack 3 is engaged with the pinion 4 in the display switching gear portion 3a, the forward and reverse directions are applied each time. Half-rotation is performed, and the division display surface of the rotation display body is switched according to the rotation direction to display the door locking / unlocking. On the other hand, in the event of an emergency, an emergency unlocking operation key is inserted into the center small hole of the rotation display body from the outside of the door D, and the rotating shaft 5 is pushed into the door D against the positioning biasing spring to pinion. 4 is meshed with the emergency unlocking gear 3c. Then, the operation key is rotated in the unlocking direction to rotate the pinion 4, and the lock bar 2 is slid to the unlocking position through the meshing with the rack 3, so that the door D is unlocked. .

  However, in such a conventional door lock device, whenever the lock bar 2 is slid back and forth, a strong centrifugal force is applied to the pinion 4 that rotates forward and backward together with the rotary shaft 5 and the rotation display body, Even if the pinion 4 has passed the meshing position with the display switching gear portion 3a, the pinion 4 may rotate more than half a turn. Therefore, as a result of repeating the sliding operation of the lock bar 2, the rotational angle of the rotary display body is shifted over time. For this reason, the locking / unlocking state of the door D is accurately switched and displayed by the division display surface of the display body. There was a problem that it was impossible to do. In addition, even when the door D is closed, if the slide operation of the lock bar 2 is halfway, the division display surface of the non-use state may be displayed. In some cases, the status may be displayed. As a result, the use / non-use status of the toilet or the like displayed on the division display surface is unclear, which may cause an unexpected trouble.

Therefore, the applicant has proposed a slide type door lock device including a display device that enables accurate switching display using a rotating display body regardless of the slide operation of the lock bar (see Patent Document 1). . As shown in FIG. 11, this conventional door lock device has a reduction gear train 6 comprising a drive gear 6a, a passive gear 6b, and large and small intermediate gears 6c and 6d connected to the tip of a rotary shaft 5, and this reduction gear. The row 6 is attached to the mounting bracket 7 and incorporated in the display device b, and the rotation of the pinion 4 is decelerated by the reduction gear row 6 and transmitted to the rotation display body 8. As a result, the rotation display body 8 is decelerated within half a rotation with respect to the sliding stroke of the lock bar 2 to accurately switch between different display sections of the rotation display body 8, and the display window 9a can be used or not used. One of the division display surfaces is surely displayed.
Japanese Utility Model Publication No. 7-14042

  By the way, recently, in the lavatory booths of hotels and hospitals where good aesthetic appearance is strongly required, the doors of toilets, etc., in particular, have a clean and good appearance with few protruding parts as much as possible. It has been requested.

  However, in the related art, the above-described display device b with a reduction function has a reduction gear train 6 in which a plurality of drive gears 6a, passive gears 6b, and intermediate gears 6c and 6d are engaged between the tip of the rotary shaft 5 and the rotary display body 8. As a result, the display device b protrudes greatly toward the outside of the door D, and as a result, the door of a lavatory booth or the like that has a poor appearance and a strong aesthetic appearance is required. There was a problem that it was not desirable to use for D.

  Moreover, the conventional door lock display device b has a structure in which a speed reduction mechanism is formed using a large number of speed reduction gears. Therefore, the number of parts is increased, the structure is complicated and the cost is increased. When mounting on the outside, the reduction gear group is assembled to the mounting bracket 7 to assemble the reduction gear train 6, the mounting bracket 7 is screwed to the outer surface of the door D, and then the passive gear 6b of the reduction gear train 6 is rotated. Since it is necessary to go through a number of mounting steps such as connecting the display cover 9 to the reduction gear train 6 or the rotation display body 8 after being connected to the display body 8 and screwing it to the mounting bracket 7, the apparatus There was also a problem that it took time and effort to assemble, and was troublesome.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a door lock device that can improve the appearance without protruding as much as possible on the outside of the door, can be easily attached to the door, and can always accurately display the switching indication of the locked / unlocked state of the door. It is in providing a display device.

  Therefore, in order to solve the above-described problem, the invention described in claim 1 is such that the lock bar 11 is slidably engaged with the attachment body 10 fixed to the door D as shown in the embodiment shown below. When the door D is clamped with the inner locking means A and the lock bar 11 is slid to lock and unlock the door D from the inside, the locking means A is provided with sliding of the lock bar 11. When the rack 20 and the pinion 15 are meshed with each other, the rotation is converted into a rotational motion, the rotation is transmitted to the outer rotation display body 30, and the different display screens 32a and 32b of the rotation display body 30 are switched to open the door from the display window 53. In the display device B for a door lock that displays the locking / unlocking state of D, a small gear 25 is provided at the tip of the rotary shaft 14 having the pinion 15 at the base end, while the small gear 25 is provided on the rotary display 30. Same as An internal gear 35 meshing on a plane is provided, and the internal gear 35 and the small gear 25 form a speed reduction mechanism G that decelerates the rotation display body 30 within half a rotation with respect to the sliding stroke of the lock bar 11. In addition, the rotation display body 30 including the speed reduction mechanism G is housed in a display case 40 and is rotatably held.

  According to a second aspect of the present invention, in the door lock tool display device B according to the second aspect of the present invention, for example, as in the illustrated embodiment shown below, the display case 40 can rotate the rotary display 30. A flat cover 50 that is slidably engaged between a holding substrate 45 to be held and a covering position that covers the rotating display body 30 and an open position that opens to the outside with respect to the mounting substrate 45, and the display window 53 is opened. It is formed by these.

  According to the first aspect of the present invention, the display device includes a small gear at the distal end of the rotation shaft having a pinion that engages with a rack screwed to the lock bar of the slidable lock unit, The display body itself is provided with an internal gear that meshes with the small gear on the same plane, and the internal gear and the small gear form a reduction mechanism that decelerates the rotation display body within half a rotation with respect to the sliding stroke of the lock bar. Since the rotation display body including the speed reduction mechanism is housed in the display case and is rotatably held, (1) the rotation display body is rotated a plurality of times by sliding the lock bar as in the prior art. Use and non-use display screens are repeatedly displayed from the display window, preventing the occurrence of unexpected troubles due to unclear use / non-use status of toilets etc., without sliding the lock bar to the end Halfway Be operated to the end, you can always displaced without reliably switching display of one of the segment display surface of use and non-use. In addition, (2) when the display device is attached to the door, the part that protrudes outside the door is suppressed as much as possible to reduce the thickness. As a result, the appearance around the door in the lavatory booth etc. is improved and the aesthetic appearance is improved. It can be significantly improved. In addition, (3) when the display device is attached to the door, it is not necessary to go through many attachment steps as in the prior art, and the door is attached to the lock means in which the attachment body is brought into contact with the inner surface from the inside of the door. From the outside, the display device can be easily attached to the door with a single touch by simply contacting and connecting the display device to the outside surface of the door.

  According to the invention described in claim 2, in the event of an emergency such as a user falling in the toilet with the door locked, an open position where the rotary display body faces the outside from the outside of the door When the rotating display is rotated in the unlocking direction after sliding the display case to the unlocking direction, the internal gear and the small gear of the reduction mechanism mesh and rotate to rotate the rotation shaft, so the pinion meshing with the rack rotates. , The lock bar is slid to the unlocking position by the rotation of the pinion, the door is unlocked, and just by opening the display case and turning the rotation display body by hand, the operation key for emergency unlocking etc. Even without using an emergency unlocking tool, the door can be easily unlocked as it is.

  Hereinafter, the best mode of the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view of a door lock tool that is a cutaway view of a display device that is an example of the present invention, and FIG. 2 is a perspective view of the door lock tool that is disassembled into a lock means and a display device. The door lock tool in the illustrated example includes a lock means A that is attached to the inside of the door D and a display device B that is attached to the outside with the toilet door D installed in the lavatory booth interposed therebetween.

  The lock means A includes a resin mounting body 10 that is fixed to the inner surface of the door D, and a metal lock bar 11 that covers the mounting body 10 and engages slidably in the length direction. The attachment body 10 is formed in a substantially H-shaped cross-section with concave engagement grooves 12 elongated along the length direction on both upper and lower side surfaces in the width direction view. In the mounting body 10, on the outer mounting surface 10 a, tube shaft-shaped studs 13, 13 having female screw holes on the inner periphery thereof are erected on both sides in the longitudinal direction, and the studs 13, 13. A rotary shaft 14 is erected so as to be freely rotatable at the center of the space. The rotating shaft 14 is made of resin, and is provided with a pinion 15 at the base end of a rectangular shaft-shaped main body shaft portion 14 a, and the pinion 15 protrudes on the inner side opposite to the mounting surface 10 a of the mounting body 10.

  The lock bar 11 has a substantially groove shape with caps 17 fitted to both ends in the length direction. In particular, the lock bar 11 engages with the engagement groove 12 of the attachment body 10 along the opening edge facing the groove opening 16. A guide piece 11a is provided, a tooth portion is screwed to one edge of the guide piece 11a to form a rack 20, and a pinion 15 is engaged with the rack 20 to hold the rotating shaft 14. At both ends in the length direction of the guide piece 11a, abutting step portions 11b for restricting the sliding stroke between the locking position and the unlocking position of the lock bar 11 are provided. Then, when the lock means A slides the lock bar 11 to the left and right between the locking position and the unlocking position with respect to the mounting body 10, the rack 20 moves while meshing with the pinion 15, so that the pinion 15 rotates and rotates. The shaft 14 is assembled so as to rotate integrally.

  On the other hand, as shown in FIGS. 3, 4, and 5, the display device B includes a rotation coupling shaft 14 b of the rotation shaft 14, a mounting plate 19, a rotation display body 30, and a display case 40. The rotary connecting shaft 14b has a tube shaft portion 22 having a substantially rectangular hollow hole 21 formed in the shaft core in accordance with the angular shaft shape of the main body shaft portion 14a, and a small gear 25 at the tip of the tube shaft portion 22. Is provided. The mounting plate 19 is provided with an insertion hole 23 through which the rotary connecting shaft 14 b passes, and through holes 24 on both sides of the insertion hole 23 through which the studs 13 and 13 pass.

  The rotary display body 30 includes a circular resin display board 31 and a display seal 32. The display plate 31 is provided with an annular internal gear 35 that meshes with the small gear 25 on the rotary connecting shaft 14 b on the inner surface of the disk portion 33. The internal gear 35 has an annular engagement groove 35a formed on the outer peripheral surface thereof. The disk portion 33 is provided with a small key insertion hole 34 for emergency unlocking at the center and a gripping portion 33a formed in a gear shape on the outer peripheral edge. The display sticker 32 is provided with a small hole 36 in the center in accordance with the key insertion hole 34, and an adhesive portion is formed on the back surface, while the front surface is color-divided into two equal parts, each being a semi-circular non-use division display surface 32a. The use division display surface 32b is formed. For example, the non-use division display surface 32a is white and the use division display surface 32b is red to identify and display the locked / unlocked state of the door D. Therefore, the rotary display body 30 having the internal gear 35 is configured by sticking the display seal 32 to the outer surface of the disk portion 33 of the display plate 31.

  The display case 40 is made of resin, and is assembled in a flat thin box shape with a base mounting substrate 45 that rotatably holds the rotary display body 30 and a flat cover 50 that is engaged with and mounted on the mounting substrate 45. . The mounting substrate 45 is provided with a U-shaped cutout hole 41 in the center portion according to the outer shape of the rotary display body 30. In the cutout hole 41, an engagement step portion 41 a corresponding to the annular engagement groove 35 a of the rotation display body 30 is provided so as to protrude along the inner peripheral edge. The mounting substrate 45 is formed with a pair of screw through holes 39 on both sides of the notch hole 41.

  Furthermore, mounting holes 46 and 47 into which the stopper pins 42 and 43 are fitted are recessed in the thickness direction in the mounting substrate 45 at diagonal positions sandwiching the notch hole 41 therebetween. The mounting holes 46 and 47 are formed from stepped square hole portions 46a and 47a having a concave shape matching the outer shape of the stopper pins 42 and 43, and spring accommodating holes 46b and 47b formed in a single step narrow hole at the back side thereof. Become. The stopper pins 42 and 43 include base portions 42a and 43a each having a small-diameter spring fitting hole 48 formed on the bottom surface, and one-stage thin shaft pin head portions 42b and 43b that protrude from the base portions 42a and 43a, respectively. One stopper pin 42 has a taper surface 42c on a pin head 42b. The stopper pins 42 and 43 are fitted in the spring fitting holes 48 with one end of the urging spring 49 fitted into the spring accommodating holes 46 b and 47 b and the other ends of the springs 49 are fitted into the mounting holes 46 and 47 in the mounting substrate 45. Include in. At that time, one stopper pin 42 is assembled in the mounting hole 46 with the tapered surface 42c of the pin head portion 42b facing the cutout hole 41 side. The stopper pins 42 and 43 have the base portions 42a and 43a in the square hole portions 46a and 47a in a state in which the pin head portions 42b and 43b protrude from the square hole portions 46a and 47a of the mounting holes 42 and 43, respectively. It is built in.

  The flat cover 50 is provided with engagement piece portions 50b and 50c bent at both side edges of the flat plate portion 50a in accordance with the tapered side surface shape of the both side portions 45a of the mounting substrate 45, respectively. A rectangular engagement hole 51 is provided near one end of the portion 50b so as to match the pin head portion 42b of the stopper pin 42, while the other engagement piece portion 50c is elongated in the longitudinal direction. Is provided. Further, the flat cover 50 has a display window 53 that is slightly closer to the engaging piece portion 50a at an eccentric position near the center of the flat plate portion 50a.

  Therefore, in the display device B, the annular step groove 41a of the rotary display body 30 is engaged with the engagement step portion 41a of the mounting substrate 45, and the disk portion 33 is engaged with the notch hole 41 to rotate. The display body 30 is rotatably held by the mounting substrate 45. Further, in the rotation display body 30, the small gear 25 is meshed with the internal gear 35, and the rotation connecting shaft 14 b is inserted through the insertion hole 23 of the mounting plate 19, and then the mounting plate 19 is bonded to the mounting substrate 45. And screwed. On the other hand, the flat cover 50 is mounted on the mounting substrate 45 while being engaged and slid with the pin head 43b of the stopper pin 43 inserted into the relief hole 52. At that time, when the edge of the engagement piece portion 50b on the rectangular engagement hole 51 side contacts the tapered surface 42c of the stopper pin 42 in a state of protruding from the attachment hole 46, the flat cover 50 once urges the stopper pin 42. The pin 49 b is pushed into the mounting hole 46 against the spring 49 and protrudes again, and the pin head 42 b is latched to the rectangular engagement hole 51. As a result, the flat cover 50 is assembled to the mounting substrate 45 in a latched state in which the flat cover 50 is retained by the stopper pins 42. Accordingly, when the flat cover 50 pushes down the pin head portion 42b of the stopper pin 42 into the mounting hole 46, the latched state with respect to the mounting substrate 45 is released, whereby the length of the escape hole 52 with which the stopper pin 43 is engaged is released. In this range, the display case 40 is assembled by being slidably attached to the mounting substrate 45 between the covering position that covers the rotary display 30 and the open position that opens to the outside. Therefore, in the display device B, as shown in FIGS. 1 and 2, the internal gear 35 and the small gear 25 are meshed on the same plane in a flat display case 40 so that the sliding stroke of the lock bar 11 is achieved. On the other hand, a speed reduction mechanism G for decelerating the rotation display body 30 within a half rotation is incorporated.

  Since the display device B is configured as described above, when the door lock is attached to the door D, first, the attachment body 10 of the lock means A is brought into contact with the inner surface of the door D from the inside of the door D. The rotating shaft 14 and the studs 13 and 13 are inserted into the door D. On the other hand, on the display device B side, the flat cover 50 is slid with respect to the mounting substrate 45 to the open position where the rotary display body 30 and the screw through hole 39 face the outside, and the display case 40 is opened. The mounting plate 19 of the display device B is brought into contact with the outer surface of the display device B from the outside, and the rotating connecting shaft 14b protruding from the mounting plate 19 is connected to the rotating shaft 14 of the main body by spline fitting and the screw of the mounting substrate 45 A set screw 55 is inserted into the through hole 39 and screwed to the studs 13 and 13, and the door 10 is sandwiched between the mounting body 10 and the mounting plate 19 and fastened. Thereafter, if the flat cover 50 is slid from the open position with respect to the mounting substrate 45 and returned to the covering position and the display case 40 is closed as shown in FIG. The door lock is easily attached to the door D so that any of the divided display surfaces 32a and 32b of the rotation display body 30 is displayed from the display window 53.

  Now, since the door lock is attached to the door D as described above, when the door D is locked from the inside, when the lock bar 11 is slid in the direction indicated by the arrow in FIG. The lock bar 11 stops at the locked position while hitting the body 10. Then, as shown by a chain line in FIG. 1, the front end of the lock bar 11 protrudes to a position straddling between the door D and the panel-like door frame F, and engages with a stopper 60 fixed to the door frame F to engage the door D. Is locked. Then, in accordance with the sliding operation of the lock bar 11, the pinion 15 is meshed and rotated in the rack 20, and the rotary connecting shaft 14b having the rotary shaft 14 and the small gear 25 rotates integrally. The small gear 25 rotates the internal gear 35 and decelerates. Then, the rotation display body 30 having the internal gear 35 rotates by decelerating within half a rotation with respect to the sliding stroke of the lock bar 11, and the red usage classification display surface 32 b is exposed from the display window 53 of the display case 40. The door D is in use in a locked state. At this time, even if a halfway operation is performed in a state in which the lock bar 11 is caught on the door frame F without sliding the lock bar 11 to the locked position, the display surface displayed from the display window 53 of the display case 40 is the use classification display surface. It can be known that the door D occupies the majority and the door D is in use in the locked state.

  On the other hand, when unlocking the door D, if the lock bar 11 is slid and slid in the direction opposite to the arrow direction, the abutting step 11b on the other side hits the mounting body 10, and the lock bar 11 It stops at the unlocked position, the engagement with the stopper 60 is released, and the door D is unlocked. Then, this time, according to the sliding direction of the lock bar 11, the speed reduction mechanism G by the meshing of the small gear 25 and the internal gear 35 is operated in reverse rotation, and the rotation display 30 is half of the sliding stroke of the lock bar 11. The display surface facing from the display window 53 of the display case 40 switches to the white non-use division display surface 32a, and the door D is unlocked to indicate that it is not in use. . Even at this time, even if the door D is opened without sliding the lock bar 11 to the unlocked position, the display surface displayed from the display window 53 of the display case 40 is not used. It can be seen that the partition display surface 32a occupies most and can be used by opening the door D.

  By the way, in the illustrated display device B, as shown in FIGS. 7, 8, and 9, from the outside of the door D, in the event of an emergency such as a user falling in the toilet while the door is locked, The flat cover 50 is slid to the open position where the rotary display 30 faces the outside, the display case 40 is opened, the grip 33a of the disk portion 33 is gripped, and the rotary display 30 is shown in the unlocking direction indicated by the arrow. To turn. Then, the internal gear 35 and the small gear 25 are meshed and rotated, so that the rotary shaft 14 is rotated integrally with the rotary connecting shaft 14 b. Therefore, the pinion 15 meshed with the rack 20 is rotated, and the lock bar 11 is released by the rotation of the pinion 15. It slides to a lock position, the front end of the lock bar 11 remove | deviates from the said metal fitting 60, and the lock | rock of the door D is cancelled | released. In the display device B, simply opening the display case 40 and manually rotating the rotating display body 30 allows the door D to be easily opened without using an emergency unlocking tool such as an emergency unlocking operation key. Can be emergency unlocked.

  In the illustrated example, when the emergency unlocking is intentionally performed using the emergency unlocking operation key, the operation key is inserted into the key insertion hole 34 of the disk portion 33 of the rotation display body 30 to release the rotation display body 30. If the door is turned in the locking direction, the door can be unlocked.

It is a top view of the door lock tool which fractures | ruptures and shows the display apparatus which is an example of this invention. It is a perspective view which decomposes | disassembles and shows a door lock tool in a locking means and a display apparatus. It is a disassembled perspective view of a display apparatus. It is a disassembled perspective view which shows a display apparatus in the opposite direction to FIG. It is a cross-sectional view which shows a display apparatus. It is a whole assembly perspective view of a door lock. It is a perspective view explaining an emergency unlocking operation by opening the display case of the display device of the door lock. It is a perspective view which changes a direction and the door lock tool from FIG. It is a cross-sectional view explaining an emergency unlocking operation by opening the display case of the display device. It is a side view which shows the internal structure of the locking means with which the conventional door lock tool was equipped. It is a top view which shows the other door lock tool which fractures | ruptures and shows the conventional display apparatus.

Explanation of symbols

A Locking means B Display device D Door G Reduction mechanism 10 Mounting body 11 Lock bar 14 Rotating shaft 14b Rotating connecting shaft 15 Pinion 20 Rack 25 Small gear 30 Rotating display bodies 32a and 32b Division display surface 35 Internal gear 40 Display case 45 Mounting substrate 50 flat cover

Claims (2)

When the door is clamped by an inner locking means in which a lock bar is slidably engaged with an attachment body fixed to the door, and the lock bar is slid to lock and unlock the door from the inside, the lock The sliding of the bar is converted into rotational motion by meshing the rack and pinion provided in the locking means, the rotation is transmitted to the outer rotational display body, and the different display sections of the rotational display body are switched and displayed. In the display device for the door lock that displays the door unlocking state from the window,
While providing a small gear at the tip of the rotation shaft having the pinion at the base end, the rotation display body is provided with an internal gear that meshes with the small gear on the same plane, and the internal gear and the small gear A speed reduction mechanism is formed that decelerates the rotation display body within half a rotation with respect to the sliding stroke of the lock bar, and the rotation display body including the speed reduction mechanism is housed in a display case and held rotatably. A display device for a door lock device.   The display case is slidably engaged between a mounting board that rotatably holds the rotary display body, and a covering position that covers the rotary display body and an open position that opens to the outside with respect to the mounting board, The display device for a door lock according to claim 1, wherein the display device is formed by a flat cover having the display window opened.

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