Electronic lock mounting structure

Abstract

To provide an electronic lock mounting structure capable of securely attaching an electronic lock to a thumb-turn device while allowing a retrofit-type electronic lock to be easily attached to and detached from the thumb-turn of the door.SOLUTION: An electronic lock mounting structure 10 includes: a recess 27 and opening 26 (electronic lock side engagement part) formed on an attachment 20 attached to an electronic lock 1; an electronic lock pedestal 30 installed to a thumb-turn mounting hole 43 provided to a door 40 to connect an existing thumb-turn 41 to a box lock 50; and an engaging claw 35 (pedestal side engaging part) that is provided protruding radially outward of the existing thumb-turn 41 which is installed in the thumb-turn mounting hole 43 from the electronic lock pedestal 30, which gets engaged with recess 27 and opening 26 when the recess 27 and the opening 26 are moved. When the recess 27 and the opening 26 of the attachment 20 are engaged with the engaging claw 35 of the electronic lock pedestal 30, the electronic lock 1 is attached to the electronic lock pedestal 30.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present disclosure relates to an electronic lock mounting structure. [Background technology]

[0002] There is known a locking and unlocking device (electronic lock) that can automatically lock or unlock a door by rotating the door thumb turn. Patent Document 1 describes a so-called retrofit type electronic lock that has a thumb turn holder that can clamp the thumb turn knob, and operates the thumb turn by rotating the thumb turn holder while clamping the knob. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6060471 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in conventional add-on electronic locks such as those described in Patent Document 1, the housing of the electronic lock must be fixed to the periphery of the thumb turn, such as the main surface of the door, in order to maintain the thumb turn knob clamped by the thumb turn holder. Double-sided tape is typically used to fix the electronic lock to the door. This has led to problems such as difficulty in removing the electronic lock from the door, difficulty in fine-tuning the position of the electronic lock, and the tape leaving an unsightly mark on the door when removed.

[0005] The present disclosure aims to provide an electronic lock mounting structure that allows an aftermarket electronic lock to be easily attached and detached to a door thumb turn and that allows the electronic lock to be securely attached to a thumb turn device. [Means for solving the problem]

[0006] An electronic lock mounting structure according to one aspect of an embodiment of the present invention comprises an electronic lock-side engaging portion provided on an electronic lock, an electronic lock base that is installed in a thumbturn mounting hole that is provided on a door to connect a thumbturn to the door, and a base-side engaging portion that protrudes from the electronic lock base radially outward of the thumbturn that is installed in the thumbturn mounting hole and engages with the electronic lock-side engaging portion as the electronic lock-side engaging portion moves, and the electronic lock is mounted to the electronic lock base by engaging the electronic lock-side engaging portion with the base-side engaging portion. The electronic lock base is installed by clamping the door from the front and back sides at the position of the thumb turn mounting hole. do. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to provide an electronic lock mounting structure that allows an after-market electronic lock to be easily attached and detached to a door thumb turn and that allows the electronic lock to be securely attached to a thumb turn device. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a plan view showing an example of an electronic lock installed on a door; [Figure 2] A perspective view showing the rear side of the electronic lock [Figure 3] FIG. 1 is a perspective view showing an electronic lock base of an electronic lock mounting structure according to a first embodiment; [Figure 4] A diagram showing the first step of an example of the procedure for attaching the electronic lock base to the thumb turn mounting hole [Figure 5] A diagram showing the second step of an example of the procedure for attaching the electronic lock base to the thumb turn mounting hole. [Figure 6] A diagram showing the third step of an example of the procedure for attaching the electronic lock base to the thumb turn mounting hole. [Figure 7] A diagram showing the fourth step of an example of the procedure for attaching the electronic lock base to the thumb turn mounting hole. [Figure 8] Diagram showing the first step in the procedure for attaching an attachment to an electronic lock base [Figure 9] Diagram showing the second step in the procedure for attaching the attachment to the electronic lock base [Figure 10]FIG. 10 is a perspective view showing a modified example of the electronic lock base in the electronic lock mounting structure according to the first embodiment; [Figure 11] FIG. 10 is an exploded perspective view showing a schematic configuration of an electronic lock mounting structure according to a second embodiment. [Figure 12] FIG. 1 is a plan view showing a groove portion of an attachment in an electronic lock mounting structure. [Figure 13] 10A and 10B are diagrams showing the installation procedure of the electronic lock installation structure according to the second embodiment; DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments will be described with reference to the accompanying drawings. To facilitate understanding of the description, the same components in the drawings will be denoted by the same reference numerals as much as possible, and duplicated descriptions will be omitted.

[0010] In the following description, the x, y, and z directions are perpendicular to each other. The x direction is the longitudinal direction of the electronic lock 1. The y direction is the lateral direction of the electronic lock 1. The z direction is the extension direction of the rotation axis of the thumb turn connecting portion 9. In the example of Figure 1, when the electronic lock 1 is installed on the door 40, the x direction is the vertical direction, and the y and z directions are horizontal directions. The x and y directions are the extension directions of the surface 40A of the door 40 on which the electronic lock 1 is installed. In the following description, the negative x direction side may be referred to as the "upper side" and the positive x direction side as the "lower side." The positive z direction side may be referred to as the "front side" or "front side," and the negative z direction side may be referred to as the "rear side," "back side," or "rear side."

[0011] [First embodiment] The first embodiment will be described with reference to FIGS.

[0012] <Outline of electronic lock configuration> First, the schematic configuration of the electronic lock 1 will be described with reference to Figures 1 and 2. Figure 1 is a plan view showing an example of how the electronic lock 1 is installed on a door 40. Figure 2 is a perspective view showing the rear side of the electronic lock 1.

[0013] As shown in Figure 1, electronic lock 1 is retrofitted to a thumb turn 41 provided on the interior surface 40A of an existing door 40. Thumb turn 41 is an element for operating the lock and unlock of door 40, and can be unlocked or locked by a user rotating knob 42 provided on the end surface on the positive z side, for example. A well-known thumb turn 41 has, for example, a truncated cone shape, and knob 42 is formed on the circular end surface so as to pass through rotation axis 4 and extend along the diameter of the circular end surface (see Figure 3).

[0014] The electronic lock 1 is a device for automatically rotating the thumb turn 41, which is normally operated manually.

[0015] As shown in Figure 2, the electronic lock 1 has a generally rectangular appearance with approximately half of the lower side cut away from the rear surface of the housing 2. The cut-out portion of the rear surface is provided with a thumb turn holder 5 that engages with the knob 42 of the thumb turn 41 of the door 40.

[0016] The thumb-turn holder 5 is driven to rotate about a rotation axis 4 shown in FIG. 1 by a power source (not shown), such as a motor, provided inside the housing 2 of the electronic lock 1. The thumb-turn holder 5 is formed, for example, in a substantially cylindrical shape as shown in FIG. 2, and a groove 51 that passes through the center of rotation and extends in the diameter direction is formed on the end face on the negative z side. The groove 51 is formed with a width that allows the knob 42 of the thumb-turn 41 to be inserted. The electronic lock 1 is installed on the interior surface 40A of the door 40, as shown in FIG. 1, with the knob 42 of the thumb-turn 41 engaged in the groove 51 of the thumb-turn holder 5. The thumb-turn holder 5 is then driven to rotate by a drive source, such as a motor, thereby rotating the thumb-turn 41 engaged in the groove 51.

[0017] A knob 3 that can be manually operated by a user is provided on the front surface of the housing 2 of the electronic lock 1, opposite the thumb turn holder 5. As shown in FIG. 1, the knob 3 has a circular surface 3A that is perpendicular to the rotation axis of the knob 3, and a roughly crescent-shaped knob portion 3B provided in the center of this circular surface 3A. The thumb turn holder 5 is fixed to the knob 3 via a rotation axis 4, and the thumb turn holder 5 rotates together with the knob 3. The user can also manually rotate the thumb turn 41 by operating the knob 3.

[0018] The electronic lock 1 receives operation instructions wirelessly or via wired communication from a controller (not shown) such as a smartphone or control panel, and performs the corresponding operation (locking, unlocking, etc.). As a wireless method, Bluetooth (registered trademark) or Wi-Fi (registered trademark) is used.

[0019] In a conventional add-on electronic lock 1, when installed on a door 40 as shown in FIG. 1, the housing 2 of the electronic lock 1 must be fixed to the periphery of the thumb turn 41, such as the surface 40A of the door 40, in order to maintain the state in which the knob portion 42 of the thumb turn 41 is clamped by the thumb turn holder 5. Double-sided tape is typically used as a conventional method for fixing the electronic lock 1 to the door 40. For example, because the back surface 2A of the housing 2 comes into contact with the surface 40A of the door 40, double-sided tape is applied to this back surface 2A and attached to the door 40. This has led to problems such as difficulty in removing the electronic lock 1 from the door 40, difficulty in fine-tuning the position of the electronic lock 1, and the tape leaving an unsightly mark on the door 40 when removed.

[0020] The electronic lock mounting structure 10 according to the first embodiment is intended to solve the problems that occur when the conventional electronic lock 1 is installed.

[0021] <Outline of Electronic Lock Mounting Structure 10> The configuration of the electronic lock mounting structure 10 will be described with reference to Fig. 3 in addition to Fig. 2. Fig. 2 is a perspective view showing the rear side of the electronic lock 1 as described above, and is also a perspective view showing the attachment 20 of the electronic lock mounting structure 10 according to the first embodiment. Fig. 3 is a perspective view showing the electronic lock base 30 of the electronic lock mounting structure 10 according to the first embodiment.

[0022] As shown in Figures 2 and 3, the electronic lock mounting structure 10 comprises an attachment 20 and an electronic lock base 30. The attachment 20 is a component installed on the back side of the electronic lock 1. The electronic lock 1 can be fixed via the attachment 20 without coming into contact with the door 40. The electronic lock base 30 is installed in a thumb turn mounting hole 43 provided in the door 40 to connect the existing thumb turn 41 to the box lock 50. The thumb turn mounting hole 43 is formed, for example, by penetrating a flat plate member that forms the interior side surface 40A of the door 40.

[0023] In the electronic lock mounting structure 10 of the first embodiment, the attachment 20 to which the electronic lock 1 is attached is rotated about the axis of the rotation shaft 4 relative to the electronic lock base 30 attached to the door 40. This causes the attachment 20 to engage with the electronic lock base 30, and as a result, the electronic lock 1 is mounted to the electronic lock base 30.

[0024] As shown in FIG. 2, the attachment 20 is attached to the electronic lock 1 so as to cover the outer periphery of the portion of the housing 2 of the electronic lock 1 that is recessed from the back surface 2A around the thumb turn holder 5, and also to cover the back surface 2A. The attachment 20 is located at the end on the negative z-axis and has a plate-like back plate 21 that extends in the x- and y-axis directions, a pair of side plate portions 23, 24 that are provided below the back plate 21 and protrude from the back plate 21 in the positive x-axis direction, and a bottom plate portion 25 that is formed to connect the lower ends of the pair of side plate portions 23, 24. The side plate portion 23 is formed along the end on the negative y-axis side of the back plate 21, and the side plate portion 24 is formed along the end on the positive y-axis side of the back plate 21, with approximately the same thickness. The inner peripheral surface of the bottom plate portion 25 that faces the thumb turn holder 5 is formed as a curved surface that follows the outer surface of the thumb turn holder 5. An end face 23A of the side plate portion 23 and an end face 24A of the side plate portion 24 (see FIG. 8, etc.) are formed to mate with a lower end face 2C of a protrusion 2B on the upper rear side of the housing 2 of the electronic lock 1.

[0025] A screw insertion hole 29 is provided in the upper part of the back plate portion 21. With the attachment 20 fitted to the rear side of the electronic lock 1, a screw 2E is inserted from the negative z direction through the screw insertion hole 29 and screwed into a screw hole 2D provided in the rear surface 2A of the housing 2 of the electronic lock 1, thereby fixing the attachment 20 to the electronic lock 1 as a single unit.

[0026] A circular opening 26 is formed in the lower part of the back plate portion 21 of the attachment 20. The shape of the opening 26 is formed to be the same as the outer shape of the thumb turn 41, and is formed so that the thumb turn 41 can be fitted therein. The circular opening 26 has a plurality of recesses 27 (four in the example of FIG. 2) formed at approximately equal intervals along the circumferential direction of the peripheral surface. The recesses 27 are formed by being recessed radially outward from the peripheral surface of the opening 26. A thin groove-like portion 27a is formed in the circumferential direction from the longitudinal end of the recess 27. The groove-like portion 27a is formed with a depth and width that allow the engagement claw 35 of the first plate 31 to be inserted. The outer edge portion of the opening 26, including the recesses 27 and the groove-like portion 27a, functions as an "electronic lock-side engagement portion provided in the electronic lock 1."

[0027] As shown in FIG. 3, the electronic lock base 30 is installed in a thumb turn mounting hole 43 provided in the door 40 to connect the existing thumb turn 41 to the box lock 50.

[0028] The electronic lock base 30 is installed by clamping the thumbturn mounting hole 43 from the front and back sides of the door 40. For example, the electronic lock base 30 is attached to the door 40 by clamping the area around the thumbturn mounting hole 43 of the flat plate member that forms the interior side surface 40A of the door 40.

[0029] The electronic lock base 30 has a first plate 31 installed on the front side of the surface 40A of the door 40 facing the interior of the room, and a second plate 32 installed on the opposite side, the back side of the door.

[0030] The first plate 31 is a substantially circular plate material. The outer diameter of the first plate 31 is larger than the diameter of the thumb turn mounting hole 43. The first plate 31 is provided with a plurality of (four in the example of FIG. 3 ) engagement claws 35 at substantially equal intervals along the circumferential direction of the circular outer edge. The engagement claws 35 protrude radially outward from the circular outer edge of the first plate 31. Each engagement claw 35 has a bent portion 35b that bends at a substantially right angle in the z direction from the outer edge of the first plate 31, and a tip portion 35a that bends at a substantially right angle from the tip of the bent portion 35b radially outward from the first plate 31 and extends substantially parallel to the first plate 31 (see also FIG. 4 ). The tip portion 35a of the engagement claw 35 has the same shape as the recess 27 of the attachment 20 described above and is formed so as to be insertable into the recess 27 when the thumb turn 41 is fitted into the opening 26 of the attachment 20.

[0031] The engagement claw 35 is formed so as to be able to engage with the groove portion 27a by shifting parallel to the z-positive side relative to the first plate 31, that is, toward the inside of the attachment 20 when the thumb turn 41 is engaged with the opening 26 of the attachment 20. The engagement claw 35 functions as a "base-side engagement portion that engages with the electronic-lock-side engagement portion by movement of the electronic-lock-side engagement portion (the outer edge portion of the opening 26 including the recess 27 of the attachment 20)."

[0032] The second plate 32 is a flat plate material and has a circular portion 33 and an ear portion 34. The circular portion 33 is a circular portion of the second plate 32. The diameter of the circular portion 33 is equal to or smaller than the diameter of the thumb turn mounting hole 43. The ear portion 34 is a portion that protrudes radially outward from the circular portion 33 (toward the negative x direction in FIG. 3). The ear portion 34 is formed with a width smaller than the diameter of the circular portion 33. The second plate 32 is formed so that it can be positioned from the front side of the door to the back side of the door through the thumb turn mounting hole 43.

[0033] The first plate 31 and the second plate 32 are connected by a plurality of screws 36 that penetrate the first plate 31, pass through the thumbturn mounting holes 43, and screw into the second plate 32. In the example of FIG. 3 , a total of four screws 36 are provided, two above the center of the thumbturn mounting holes 43 and two below. When the first plate 31 and the second plate 32 are connected, the portion of the plate-like member that forms the interior-facing surface 40A of the door 40, surrounding the thumbturn mounting holes 43, is sandwiched between the first plate 31 and the ears 34 of the second plate 32, thereby fixing the electronic lock base 30 to the door 40. In this way, the electronic lock base 30 is attached to the thumbturn mounting hole 43 by the first plate 31 and the second plate 32 being connected together with the thumbturn mounting hole 43 sandwiched therebetween.

[0034] <Installation procedure for electronic lock mounting structure 10> Here, the method of installing the electronic lock base 30 in the thumb turn mounting hole 43 will be further described with reference to Figures 4 to 7. Figures 4 to 7 are diagrams showing first to fourth steps of an example of the procedure for installing the electronic lock base 30 in the thumb turn mounting hole 43.

[0035] In the first stage shown in FIG. 4 , the first plate 31 and the second plate 32 are connected only at two points at the top with screws 36. At this time, the distance between the first plate 31 and the second plate 32 is set sufficiently larger than the depth of the thumbturn mounting hole 43. Then, in the first stage, as described above, the second plate 32 is placed from the front side of the door (in the example of FIG. 4 , the outer surface side of the flat plate member forming the interior-facing surface 40A of the door 40) through the thumbturn mounting hole 43 to the back side of the door (in the example of FIG. 4 , the back surface 40B side of the flat plate member facing the interior of the door 40). For example, as shown by arrow A1 in FIG. 4 , the second plate 32 is inserted into the thumbturn mounting hole 43 starting from the lower circular portion 33, where the screws 36 are not attached. The outer diameter of the circular portion 33 is smaller than the diameter of the thumbturn mounting hole 43, so it can pass through the thumbturn mounting hole 43.

[0036] 5, when the lower end portion of circular portion 33 reaches back surface 40B, it is moved downward from the lower end of thumbturn mounting hole 43 as shown by arrow A2, so that circular portion 33 faces back surface 40B. At this time, because ear portion 34 at the top of second plate 32 is formed with a width smaller than the diameter of the circular portion, ear portion 34 also passes through thumbturn mounting hole 43. As a result, in the second stage, second plate 32 is positioned on back surface 40B of door 40, and first plate 31 remains on front surface 40A of door 40.

[0037] 6, as shown in the third stage, second plate 32 arranged on the back surface 40B of door 40 is moved upward as indicated by arrow A3, and ear 34 is positioned above thumbturn mounting hole 43. As a result, circular portion 33 is positioned opposite thumbturn mounting hole 43, and ear 34 is positioned opposite the outer edge of thumbturn mounting hole 43 on back surface 40B of door 40.

[0038] 7, first plate 31 and second plate 32 are fastened together with four screws 36 until the distance between them is the same as the depth of thumbturn mounting hole 43, whereby first plate 31 and second plate 32 sandwich the flat plate member that forms interior-facing surface 40A of door 40 from surface 40A and back surface 40B. As a result, it is installed in thumbturn mounting hole 43 of electronic lock base 30.

[0039] Returning to Figure 3, a substantially circular opening 37 is provided in the circular center of the electronic lock base 30, and these openings 37 allow the rotation shaft 4 of the existing thumb turn 41 to be inserted into the box lock 50 inside the door 40. Therefore, the existing thumb turn 41 can be installed on the door 40 as before, even when the electronic lock base 30 is placed on the door 40. When the existing thumb turn 41 is also installed on the door 40, the electronic lock base 30 is positioned between the existing thumb turn 41 and the surface 40A of the door 40. When the first plate 31 of the electronic lock base 30 is positioned between the existing thumb turn 41 and the door 40 in this way, the engagement claw 35 of the electronic lock base 30 is positioned to protrude radially outward from the truncated cone-shaped main body of the existing thumb turn 41 (see Figure 8).

[0040] The procedure for attaching the attachment 20 to the electronic lock base 30 installed on the door 40 will be described with reference to Figures 8 and 9. Figures 8 and 9 are diagrams showing the first and second steps of the procedure for attaching the attachment 20 to the electronic lock base 30. As described above, in the first embodiment, the attachment 20 is connected to and fixed to the electronic lock base 30 by rotating the attachment 20 around the rotation shaft 4 relative to the electronic lock base 30.

[0041] 8, four engaging claws 35 are provided on the first plate 31 of the electronic lock base 30, extending straight up, downward, horizontally left, and horizontally right from the center. The four engaging claws 35 are arranged approximately every 90 degrees from the straight up position along the circumferential direction.

[0042] Meanwhile, the recesses 27 of the attachment 20 are provided at approximately equal intervals in the circumferential direction of the opening 26, and the number of recesses 27 is the same as the number of engaging claws 35. The recesses 27 are formed into a shape that allows the engaging claws 35 to fit into them. Furthermore, thin groove-like portions 27a are formed in the circumferential direction from the longitudinal end of each recess 27, and are formed so that the tip portions 35a of the engaging claws 35, which are formed horizontally with the door surface, can be inserted into them. The recesses 27 are arranged at approximately 45 degrees in the circumferential direction relative to the arrangement of the engaging claws 35, and the groove-like portions 27a extend from the recesses 27 to a position that is approximately 45 degrees in the circumferential direction.

[0043] 8, first, the attachment 20 is tilted approximately 45 degrees around the thumbturn shaft 4 so that the engaging claws 35 of the electronic lock base 30 and the recesses 27 of the attachment 20 mate with each other, and the recesses 27 of the attachment 20 are aligned with the engaging claws 35 of the electronic lock base 30. Then, in this state, the attachment 20 is mated with the thumbturn 41, as shown by arrow A4. At this time, the thumbturn 41 mates with the opening 26 of the attachment 20, the four engaging claws 35 of the electronic lock base 30 mate with the four recesses 27 of the attachment 20, and the bottom surfaces of the recesses 27 (the surfaces on the electronic lock 1 side that face the tip ends 35a) abut against the tip ends 35a of the engaging claws 35.

[0044] Furthermore, in this embodiment, the rotational position of the thumb turn holder 5 of the electronic lock 1 is fixed by a fixing jig G (see Figure 2) so that the thumb turn 41 is in the unlocked position when the electronic lock 1 is attached to the electronic lock base 30. (In Figure 8, the thumb turn holder 5 is stopped in the unlocked position to show the groove portion 51 of the thumb turn holder 5.) Therefore, even when the attachment 20 and electronic lock 1 are tilted, the groove portion 51 of the thumb turn holder 5 can mate with the knob portion 42 of the thumb turn 41, making it possible to connect the electronic lock 1 and the thumb turn 41.

[0045] In the second stage shown in FIG. 9 , the attachment 20 is rotated approximately 45 degrees, as indicated by arrow A5. At this time, the engagement claw 35 enters the groove 27a from the recess 27 of the attachment 20, with the tip 35a of the engagement claw 35 entering the groove 27a. The bent portion 35b protruding from the wall (the interior-facing surface 40A of the door) is positioned on the interior side along the inner edge of the opening 26 of the attachment 20. Therefore, the engagement claw 35 does not impede the rotation of the attachment 20, allowing the attachment 20 to rotate. After the rotation, the engagement claw 35 is shifted circumferentially from its position facing the recess 27 and positioned within the groove 27a, so that the outer edge of the opening 26 is interposed in the gap between the engagement claw 35 and the door 40. This engages the attachment 20 with the electronic lock base 30, securing the electronic lock 1 to the door 40.

[0046] The groove 27a extends to a position approximately 45 degrees circumferentially away from the recess 27. The edge of the groove 27a (the portion indicated by reference symbol 27b in FIGS. 2 and 8) functions as a stopper 27b that prevents the engagement pawl 35 from moving any further away from the recess 27. The rotational position can be temporarily determined at the position of the stopper 27b by rotating the engagement pawl 35 until it abuts against the stopper 27b. However, the position of the stopper 27b may be provided with some leeway so that the rotational position can be adjusted. For example, the position of the stopper 27b may be shifted further away from the recess 27 than the desired circumferential position of the engagement pawl 35.

[0047] The engagement structure between the engaging claw 35 and the hole 26 may also be configured without providing the groove 27a in the hole 26. In this case, after the installation procedure shown in FIGS. 8 and 9, the engaging claw 35 passes through the recess 27 of the attachment 20 and is positioned inside the attachment 20, and is shifted circumferentially from its position facing the recess 27. In other words, the engaging claw 35 is positioned opposite the inner surface of the outer edge of the opening 26 (the surface facing the positive z direction in FIG. 2). This causes the outer edge of the opening 26 to be interposed in the gap between the engaging claw 35 and the door 40, allowing the outer edge of the opening 26 to be sandwiched between the door 40 and the tip 35a of the engaging claw 35, thereby engaging the attachment 20 and the electronic lock base 30. This configuration can also provide a function similar to that of the stopper 27b described above. For example, a protrusion that protrudes toward the electronic lock 1 (the z-positive side) is provided on the inner surface of the attachment 20 (the surface facing the z-positive side in FIG. 2) of the outer edge of the opening 26. By arranging this protrusion at the same circumferential position as the stopper 27b, the tip 35a of the engaging claw 35 can be brought into contact with this protrusion to restrict the movement of the engaging claw 35, and this protrusion can function as a stopper.

[0048] 9, the outer edge of opening 26 of attachment 20 is restricted from moving in the positive z direction in the axial direction by engaging claw 35 of electronic lock base 30, and is also restricted from moving in the negative z direction by surface 40A of door 40. Furthermore, as thumb turn 41 engages with opening 26, movement of attachment 20 in the x and y directions is also restricted.

[0049] When removing the attachment 20 from the electronic lock base 30 from the attached state shown in Fig. 9, first rotate the attachment 20 in the direction opposite to the arrow A5 shown in Fig. 9, and rotate the recess 27 of the attachment 20 along the circumferential direction. Then, when the circumferential positions of the recess 27 of the attachment 20 and the engaging claw 35 of the electronic lock base 30 are aligned, the attachment 20 can be moved in the direction opposite to the arrow A4 shown in Fig. 8, and the attachment 20 (and electronic lock 1) is removed from the electronic lock base 30 (and door 40).

[0050] As such, the electronic lock mounting structure 10 of the first embodiment comprises a recess 27 and an outer edge portion (electronic lock side engagement portion) of the opening 26 provided in the attachment 20 attached to the electronic lock 1, an electronic lock base 30 installed in the thumb turn mounting hole 43 provided in the door 40 to connect the existing thumb turn 41 to the box lock 50, and an engagement claw 35 (base side engagement portion) that protrudes radially outward from the electronic lock base 30 of the existing thumb turn 41 installed in the thumb turn mounting hole 43 and engages with the electronic lock side engagement portion as the electronic lock side engagement portion moves, and the electronic lock 1 is mounted to the electronic lock base 30 by the recess 27 and opening 26 of the attachment 20 engaging with the engagement claw 35 of the electronic lock base 30.

[0051] With this configuration, the electronic lock 1 is attached to the electronic lock base 30, rather than being attached to the surface of the door 40 by adhesive or the like as in the past. The attachment is achieved by the engagement of the recess 27 and opening 26 of the attachment 20 with the engaging claw 35 of the electronic lock base 30. Furthermore, when the electronic lock 1 is attached to the electronic lock base 30, the recess 27, opening 26, and engaging claw 35 are relatively movable. Therefore, compared to the conventional attachment method using adhesive or the like, the electronic lock 1 can be easily attached and removed. Furthermore, the recess 27 of the attachment 20 also functions as a guide for the attachment position, allowing the electronic lock 1 to be more reliably attached to the desired position. Therefore, the retrofit-type electronic lock 1 can be easily attached to and removed from the electronic lock base 30 of the door 40. Furthermore, because the outer edge of the opening 26 of the attachment 20 engages with the engaging claw 35 of the electronic lock base 30, the electronic lock 1 is less likely to come off even when external force is applied, allowing the electronic lock 1 to be firmly attached to the electronic lock base 30.

[0052] Furthermore, in the electronic lock mounting structure 10 of the first embodiment, the electronic lock base 30 is installed by clamping the thumbturn mounting hole 43 from the front and back sides of the door. This configuration makes it possible to firmly fix the electronic lock base 30 to the door 40, so the electronic lock 1 attached to the electronic lock base 30 can be more reliably installed on the door 40. Furthermore, because the existing thumbturn mounting hole 43 can be used to attach the electronic lock base 30 to the door 40, there is no need to drill a new mounting hole or prepare a mounting jig, making installation easier.

[0053] In the electronic lock mounting structure 10 of the first embodiment, the electronic lock base 30 has a first plate 31 installed on the front side of the door and a second plate 32 installed on the back side of the door. The outer diameter of the first plate 31 is larger than the diameter of the thumbturn mounting hole 43. The second plate 32 has a circular portion 33 whose diameter is equal to or smaller than the diameter of the thumbturn mounting hole 43, and a lug portion 34 that protrudes radially outward from the circular portion 33 and has a width smaller than the diameter of the circular portion 33. The second plate 32 is formed so that it can be positioned from the front side of the door through the thumbturn mounting hole 43 to the back side of the door. In addition, the engagement claw 35 (base-side engagement portion) is formed so as to protrude radially outward from the first plate 31. The electronic lock base 30 is attached to the thumbturn mounting hole 43 by connecting the first plate 31 and the second plate 32 while sandwiching the thumbturn mounting hole 43.

[0054] 4 to 6, this configuration allows the second plate 32 to be placed on the back side of the door from the front side of the door through the thumbturn mounting hole 43, eliminating the need to remove the box lock 50 from the door 40 in order to place the second plate 32 inside the door 40. As a result, as long as there is an existing thumbturn mounting hole 43, the first plate 31 and the second plate 32 can be easily placed on the front and back sides, making it easier to attach the electronic lock base 30 to the door 40.

[0055] Furthermore, in the electronic lock mounting structure 10 of the first embodiment, the "movement" for engaging the engagement claw 35 (base-side engagement portion) of the electronic lock base 30 with the opening 26 (electronic lock-side engagement portion) of the attachment 20 is a rotational movement around the axis of the thumbturn shaft 4. With this configuration, by aligning the position of the recess 27 of the attachment 20 with the engagement claw 35 of the electronic lock base 30, the electronic lock 1 can be mounted to the electronic lock base 30 with the simple operation of inserting the attachment 20 from the front side of the door (positive z-direction side) and then rotating it around the thumbturn shaft 4. Furthermore, after the electronic lock 1 is mounted to the electronic lock base 30, the electronic lock 1 can be removed from the electronic lock base 30 with the simple operation of rotating and removing the attachment 20. This makes it even easier to attach and detach the electronic lock 1 to and from the electronic lock base 30.

[0056] Furthermore, in the electronic lock mounting structure 10 of the first embodiment, the opening 26 and recess 27 (electronic lock side engagement portion) of the attachment 20 are provided on the attachment 20, which is installed on the back side of the electronic lock 1. With this configuration, there is no need to directly provide an engagement structure with the electronic lock base 30 on the electronic lock 1, so even existing add-on type electronic locks that were not originally designed to engage with the electronic lock base 30 can be attached to the electronic lock base 30 by attaching the attachment 20. Therefore, existing add-on type electronic locks can be applied, improving versatility.

[0057] In the first embodiment, the attachment 20 and the electronic lock 1 are separate components, but the attachment 20 and the electronic lock 1 may be integrated. In this case, it can also be expressed as "the opening 26 and the recess 27 (electronic lock side engagement portion) are provided in the electronic lock 1."

[0058] [Variations] A modified example of the first embodiment will be described with reference to Fig. 10. Fig. 10 is a perspective view showing a modified example of the electronic lock base 130 in the electronic lock mounting structure 10 according to the first embodiment.

[0059] The mounting structure of the electronic lock base to the thumbturn mounting hole 43 may be configured differently from the above-described structure in which the thumbturn mounting hole 43 is sandwiched between the first plate 31 and the second plate 32, as long as the mounting structure is configured to sandwich the thumbturn mounting hole 43 from the front and back sides of the door. For example, an electronic lock base 130 shown in Figure 10 may have a plate 131 installed on the front side of the door and a nut 132 installed on the back side of the door, and be configured to sandwich the thumbturn mounting hole 43 between the plate 131 and the nut 132 when installed.

[0060] In this case, the outer diameters of plate 131 and nut 132 are formed to be larger than the diameter of thumbturn mounting hole 43. Plate 131 has a cylindrical portion 133 formed on the negative z side of central opening 37. A threaded portion 134 that can be inserted through thumbturn mounting hole 43 is provided on the outer peripheral surface of this cylindrical portion 133.

[0061] The electronic lock base 130 is attached to the thumbturn mounting hole 43 by threading a nut 132 from the back side of the door onto a screw portion 134 that is inserted through the thumbturn mounting hole 43 from the front side to the back side of the door. The nut 132 can be placed on the back side of the thumbturn mounting hole 43 by removing the box lock 50 installed on the door 40.

[0062] Furthermore, the mounting structure of the electronic lock base to the thumb turn mounting hole 43 only needs to be able to be installed in an existing thumb turn mounting hole 43, and it can be a configuration other than one in which the thumb turn mounting hole 43 is clamped from the front and back sides of the door.

[0063] [Second embodiment] The second embodiment will be described with reference to Figures 11 to 13. Figure 11 is an exploded perspective view showing the schematic configuration of an electronic lock mounting structure 200 according to the second embodiment. Figure 12 is a plan view showing grooves 227A and 227B of an attachment 220 of the electronic lock mounting structure 200. Figure 13 is a diagram showing the mounting procedure for the electronic lock mounting structure 200 according to the second embodiment.

[0064] <Outline of the electronic lock mounting structure 200> The electronic lock mounting structure 200 according to the second embodiment is similar to the first embodiment in that an attachment 220 to which an electronic lock 1 is attached is engaged with an electronic lock base 230 attached to a door 40. However, the electronic lock mounting structure 200 according to the second embodiment differs from the first embodiment in the engagement configuration between the attachment 220 and the electronic lock base 230. More specifically, in the electronic lock mounting structure 200 according to the second embodiment, the attachment 220 and the electronic lock base 230 are engaged by sliding in one predetermined direction (for example, vertically downward from the x-negative side (upper side) to the x-positive side (lower side)) along the extension direction of the surface 40A of the door 40 to which the electronic lock base 230 is attached.

[0065] As shown in FIG. 11, the electronic lock base 230 has a first plate 231 installed on the front side of the door and a second plate 232 installed on the back side of the door.

[0066] The second plate 232 has a circular portion 233 and an ear portion 234 similar to the circular portion 33 and the ear portion 34 of the first embodiment. The first plate 231 has a circular portion 238 shaped similarly to the first plate 31 of the first embodiment.

[0067] The first plate 231 and the second plate 232 have a mechanism similar to that of the first plate 31 and the second plate 32 of the first embodiment, and the second plate 232 can be positioned from the front side of the door to the back side of the thumbturn mounting hole 43. Then, by connecting the circular portion 238 of the first plate 231 to the second plate 232 with four screws 236, the thumbturn mounting hole 43 is clamped from both the front side and the back side of the door. Furthermore, even when the electronic lock base 230 is placed on the door 40, the existing thumbturn 41 can be connected to the box lock 50 inside the door 40 via an opening 237 provided in the circular center of the electronic lock base 230, and can be installed on the door 40.

[0068] The first plate 231 further has a rectangular portion 239 that protrudes radially outward from the circular portion 238 (toward the negative z direction in the example of FIG. 11). The rectangular portion 239 has opposite sides extending along the x direction on both sides in the y direction, and a pair of ribs 235A, 235B is formed on these opposite sides along the x direction. The pair of ribs 235A, 235B are each formed to protrude outward in the y direction from the rectangular portion 239. These ribs 235A, 235B function as "base-side engaging portions that engage with electronic-lock-side engaging portions (grooves 227A, 227B of the attachment 220) as the electronic-lock-side engaging portions move."

[0069] 11 and 12, the attachment 220 has a back plate portion 221 that has a shape similar to that of the back plate portion 21 of the attachment 20 of the first embodiment. As shown in Fig. 12, an opening 226 is formed in the lower part of this back plate portion 221, recessed upward from the lower end. The shape of the opening 226 is formed similar to the outer shape of the first plate 231 of the electronic lock base 230 (rectangular in the example of Fig. 12), and is formed so that the first plate 231 can be fitted therein.

[0070] That is, the opening 226 is defined on both sides in the y direction by a pair of side surfaces 226A, 226B that respectively face a pair of opposite sides of the rectangular portion 239 of the first plate 231. Grooves 227A, 227B are formed in the pair of side surfaces 226A, 226B, respectively, along the x direction. The grooves 227A, 227B are recessed from the side surfaces 226A, 226B toward the outside of the opening 226. These grooves 227A, 227B function as "electronic lock-side engagement portions provided in the electronic lock 1."

[0071] <Electronic lock installation and removal procedures> 13, in the electronic lock mounting structure 200 of the second embodiment, first, an attachment 220 is attached to the electronic lock 1, and then an electronic lock base 230 is attached to the thumb turn mounting hole 43 of the door 40. Then, as shown by arrow B1, a thumb turn 41 is attached to the thumb turn mounting hole 43 attached to the electronic lock base 230.

[0072] Next, grooves 227A and 227B of attachment 20 are aligned from above to a position where they can engage with ribs 235A and 235B of electronic lock base 30. Then, as indicated by arrow B2, attachment 20 is slid downward from this aligned position in the direction of extension of ribs 235A and 235B and grooves 227A and 227B, thereby engaging grooves 227A and 227B with ribs 235A and 235B and connecting attachment 20 to electronic lock base 30. At this time, knob 42 of thumb turn 41 engages with groove 51 of thumb turn holder 5 of electronic lock 1. As a result, attachment 20 and electronic lock base 30 are connected and fixed, and electronic lock 1 is attached to electronic lock base 30 of door 40.

[0073] When removing the attachment 220 from the electronic lock base 230 from this state, the attachment 220 is moved upward in the opposite direction to the arrow B2, thereby removing the grooves 227A and 227B of the attachment 220 from the ribs 235A and 235B of the electronic lock base 230, and as a result, the attachment 220 (and the electronic lock 1) can be removed from the door 40.

[0074] In the electronic lock mounting structure 200 of the second embodiment, the "movement" for engaging the grooves 227A, 227B (electronic lock-side engaging portions) of the attachment 220 with the ribs 235A, 235B (base-side engaging portions) of the electronic lock base 230 is a sliding movement in a predetermined direction (for example, vertically downward). With this configuration, by aligning the grooves 227A, 227B with the ribs 235A, 235B of the electronic lock base 230, the electronic lock 1 can be mounted on the electronic lock base 230 simply by inserting the attachment 220 from above. Furthermore, after the electronic lock 1 is mounted on the electronic lock base 230, the electronic lock 1 can be removed from the electronic lock base 230 simply by removing the attachment 220 upward. This further simplifies the attachment and detachment of the electronic lock 1 from the electronic lock base 230.

[0075] In the electronic lock mounting structure 200 of the second embodiment, the electronic lock 1 is mounted to the electronic lock base 230 by sliding the attachment 220, to which the electronic lock 1 is attached, vertically downward relative to the electronic lock base 230 mounted to the door 40, but the direction of the sliding movement is not limited to vertically downward. The sliding direction may be at least one predetermined direction along the extension direction of the surface 40A of the door 40 to which the electronic lock base 230 is mounted. For example, the attachment 220 may be slid horizontally (y direction) to engage with the electronic lock base 230.

[0076] Also, in the electronic lock mounting structure 200 of the second embodiment, similar to the modified example of the first embodiment, it is possible to apply a configuration in which the second plate 232 is connected to the first plate 231 using a nut instead of the second plate 232.

[0077] The present embodiment has been described above with reference to specific examples. However, the present disclosure is not limited to these specific examples. Design modifications to these specific examples made by a person skilled in the art as appropriate are also included within the scope of the present disclosure as long as they comprise the features of the present disclosure. The elements of the above-described specific examples, as well as their arrangement, conditions, shape, etc., are not limited to those exemplified and can be modified as appropriate. The elements of the above-described specific examples can be combined in various ways as appropriate, as long as no technical contradictions arise. [Explanation of symbols]

[0078] DESCRIPTION OF SYMBOLS 1...electronic lock, 5...thumb turn holder, 10, 200...electronic lock mounting structure, 20, 220...attachment, 26...opening (electronic lock side engaging portion), 27...recess (electronic lock side engaging portion), 30, 130, 230...electronic lock base, 31...first plate, 32...second plate, 33...circular portion, 34...ear portion, 35...engaging claw (base side engaging portion), 41...existing thumb turn, 42...knob portion, 43...thumb turn mounting hole, 131...plate, 132...nut

Claims

1. an electronic lock side engaging portion provided on the electronic lock; a base-side engaging portion provided on an electronic lock base that is installed in a thumb-turn mounting hole provided on the door to connect the thumb-turn to the door, the base-side engaging portion protruding from the electronic lock base to the outside in the radial direction of the thumb-turn installed in the thumb-turn mounting hole, and engaging with the electronic lock-side engaging portion as the electronic lock-side engaging portion moves; Equipped with The electronic lock is attached to the electronic lock base by engaging the electronic lock side engaging portion with the base side engaging portion. The electronic lock base is installed by clamping the door from the front side and the back side at the position of the thumb turn mounting hole. Electronic lock mounting structure.

2. The electronic lock base has a first plate installed on the front side of the door and a second plate installed on the back side of the door, The outer diameter of the first plate is larger than the diameter of the thumb turn mounting hole, The second plate has a circular portion having a diameter equal to or smaller than the diameter of the thumb turn mounting hole, and a lug portion protruding radially outward from the circular portion and formed with a width smaller than the diameter of the circular portion, and is formed to be able to pass from the door front side to the door back side through the thumb turn mounting hole, the base-side engaging portion is formed to protrude radially outward from the first plate, The electronic lock base is attached to the thumb turn mounting hole by connecting the first plate and the second plate while sandwiching the door at the position of the thumb turn mounting hole. The electronic lock mounting structure according to claim 1.

3. The electronic lock base has a plate installed on the front side of the door and a nut installed on the back side of the door, The outer diameters of the plate and the nut are larger than the diameter of the thumb turn mounting hole, The plate has a screw portion that can be inserted into the thumb turn mounting hole, The base-side engaging portion is formed to protrude radially outward from the plate, The electronic lock base is attached to the thumb turn mounting hole by threading the nut from the back side of the door into the screw portion inserted into the thumb turn mounting hole from the front side of the door to the back side of the door. The electronic lock mounting structure according to claim 1.

4. The movement is a sliding movement in one predetermined direction. The electronic lock mounting structure according to any one of claims 1 to 3.

5. The movement is a rotational movement around the axis of the thumb turn shaft. The electronic lock mounting structure according to any one of claims 1 to 3.

6. The electronic lock side engaging portion is provided on an attachment installed on the back side of the electronic lock, The electronic lock mounting structure according to any one of claims 1 to 5.

7. The electronic lock has a thumb turn holder that engages with the knob of the thumb turn to enable rotation of the knob, The thumb turn holder is rotatable when the electronic lock is attached to the electronic lock base. The electronic lock mounting structure according to any one of claims 1 to 6.

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