JP4343463B2 - Lock structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lock structure formed by extrapolating a decorative ring on the outer periphery of a cylinder lock protruding from a door surface.
[0002]
[Prior art]
The cylinder lock has an inner cylinder portion having a key insertion hole inside the outer cylinder portion, and a plurality of pins arranged in the key insertion direction are arranged at predetermined positions in the cylinder portion diameter direction according to the depth of the key groove. The inner cylinder can be rotated, the locking / unlocking operation force is input to the locking mechanism in the lock box provided in the door, and the deadbolt is advanced and retracted from the door's mouth, allowing the door to be locked and unlocked. ing.
[0003]
As shown in FIG. 13, the cylinder lock 1 is accommodated inside the fixed cylinder 3 via a spacer 5. An axial groove 7 is provided on the inner wall of the fixed cylinder, and the groove 7 is fitted with a protrusion 9 protruding from the outer periphery of the cylinder lock 1 to restrict the rotation of the cylinder lock 1. A circumferential groove 11 is provided on the inner periphery of the rear portion of the fixed cylinder 3, and a retaining ring 13 is fitted in the circumferential groove 11. The retaining ring 13 presses the rear end surface of the cylinder lock 1 through a ring-shaped liner 15 and prevents the cylinder lock 1 from moving rearward (to the right in FIG. 13).
[0004]
The fixed cylinder 3 has a rear portion inserted into a lock insertion hole 19 formed in the door surface 17 a, and a base end is fixed to a lock box (not shown) provided in the door 17. On the outer periphery of the fixed cylinder 3 protruding from the door surface 17 a, a conical decorative ring 21 with the tip side cut off is extrapolated so that the tip portion is the tip side of the cylinder lock 1. A coil spring 23 is externally supported on the outer periphery of the fixed cylinder 3, and the coil spring 23 urges the decorative ring 21 by an urging force, and a rear end thereof is brought into contact with the door surface 17a.
[0005]
By adopting such a biasing structure of the decorative ring 21, even if the protruding length of the cylinder lock 1 from the door surface 17a is different, the decorative ring 21 is moved in the axial direction of the cylinder lock 1, The rear end surface of the decorative ring 21 can always be brought into contact with the door surface 17a to cover the lock insertion hole 19, and the same cylinder lock 1 can be attached to the door 17 having a different thickness.
[0006]
[Problems to be solved by the invention]
However, the lock structure in which the decorative ring is externally attached to the outer periphery of the cylinder lock is a conical cylindrical body having an opening at the tip of the decorative ring. Form. For this reason, if the decorative ring is crushed and deformed, it can be held with a tool, and if the fixed cylinder and cylinder lock are forcibly rotated together with the decorative ring in this state, the entire locking device can be destroyed. It becomes possible.
[0007]
Also, it was not impossible to break the cylinder lock from the lock box by removing the decorative ring with a tool such as a bar, grasping the exposed cylinder lock, and squeezing the cylinder lock with a large force.
[0008]
The present invention has been made in view of the above circumstances, and a first object of the invention is to provide a lock structure that can prevent breakage caused by crushing and deforming a decorative ring and rotating it.
The second object of the invention is to provide a lock structure capable of preventing the cylinder lock from being broken and broken by gripping the exposed cylinder lock and squeezing the cylinder lock with an excessive force.
[0009]
[Means for Solving the Problems]
Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
In the lock structure according to the first aspect of the present invention, a base end of the cylinder lock 31 is fixed to a lock box provided in the door 49 through a lock insertion hole 63 formed in the door surface 49a, and the door surface 49a. A generally conical decorative ring 65 having an open front end is externally attached to the outer periphery of the cylinder lock 31 protruding from the cylinder lock 31 so that the front end portion is the front end side of the cylinder lock 31 and is supported by the cylinder lock 31. In the lock structure in which the rear end portion of the decorative ring 65 is brought into contact with the door surface 49a by the biasing force of the coil spring 69,
The decorative ring 65 has an inner wall portion 67 that has a distal end portion bent inward and the coil spring 69 is disposed inside. The bent end 67a of the inner wall portion 67 is brought into contact with the outer periphery of the cylinder lock 31 so that the coil spring 69 Abutting against the other end and receiving the biasing force,
It is arranged in a space between the inner periphery of the decorative ring 65 and the outer periphery of the cylinder lock 31, and the base end side is fitted between the outer periphery of the cylinder lock 31 and the inner periphery of the lock insertion hole 63. The distal end side is provided with an insertion portion 71a having an enlarged inner periphery so that the bent end 67a of the decorative ring 65 can be freely inserted, and is fixedly fitted to the outer periphery of the cylinder lock 31 by a fixing means. A ring member 71 arranged so as to support the decorative ring 65 from the outer periphery of the lock 31 is provided;
The outer periphery on the tip side of the ring member 71 is in contact with the inner periphery of the decorative ring 65, so that the deformation of the decorative ring 65 inward in the radial direction is prevented.
[0010]
In this lock structure, the ring member 71 fitted to the outer periphery of the cylinder lock 31 abuts on the inner periphery of the decorative ring 65 and prevents the decorative ring 65 from deforming inward in the radial direction. Therefore, it becomes difficult to crush and deform the decorative ring 65 using a tool, and the decorative ring 65 maintains a conical shape for sliding a tool such as a pipe wrench. Thereby, it becomes difficult to grasp the decorative ring 65, and it is possible to prevent destruction of the entire lock device by grasping the deformed decorative ring 65 and forcibly rotating the cylinder lock 31.
[0011]
The lock structure according to claim 2 is the lock structure according to claim 1, wherein the base end portion of the ring member 71 is formed in a tapered shape with an outer diameter gradually decreasing toward the base end. The tip of the portion 73 is inserted into the lock insertion hole 63.
[0012]
In this lock structure, the base end portion of the ring member 71 fitted to the outer periphery of the cylinder lock is directly fitted into the lock insertion hole 63 of the door 49. Thereby, the integrated strength of the ring member 71 and the door 49, and hence the integrated strength of the cylinder lock 31 and the door 49 can be improved, and the strength of tearing off the cylinder lock 31 from the door 49 is increased. In addition, since the base end portion of the ring member 71 has a tapered shape with an outer diameter gradually decreasing toward the base end, the lock insertion hole 63 for fitting the ring member 71 is made larger than necessary. Thus, the fixing strength of the cylinder lock 31 with respect to the door 49 is not lowered, and a covering margin by the decorative ring 65 can be sufficiently secured.
[0013]
In the lock structure according to claim 3, the base end of the cylinder lock 31 is fixed to a lock box provided in the door 49 via a lock insertion hole 63 formed in the door surface 49 a and protrudes from the door surface 49 a. A coil spring 69 that is externally inserted on the outer periphery of the cylinder lock 31 so that the front end portion is the tip side of the cylinder lock 31 and is externally supported on the cylinder lock 31. In the lock structure in which the rear end portion of the decorative ring 65 is brought into contact with the door surface 49a by the urging force of
The decorative ring 65 has an inner wall portion 67 that has a distal end portion bent inward and the coil spring 69 is disposed inside. The bent end 67a of the inner wall portion 67 is brought into contact with the outer periphery of the cylinder lock 31 so that the coil spring 69 Abutting against the other end and receiving the biasing force,
A collar portion 95 that is disposed in the space between the inner periphery of the decorative ring 65 and the outer periphery of the cylinder lock 31 and that is formed by bending the rear end portion inwardly is hooked on the rear end surface of the cylinder lock 31. The cylinder lock 31 is fitted on the outer periphery of the cylinder lock 31 and is engaged with the cylinder lock 31 through a side fixing hole 96. The tip end side is formed outwardly at a position behind the bent end 67a. The enlarged diameter portion 91 (103 or 113) protrudes toward the inner periphery of the decorative ring 65, the rear end portion is positioned in the lock insertion hole 63, and the enlarged diameter portion 91 (103 or 113) is the door surface. The ring member 93 (or 101, 101) in which the diameter-expanded portion 91 (103 or 113) is disposed so as to protrude from the outer periphery of the cylinder lock 31 toward the inner periphery of the decorative ring 65. 111),
The diameter-enlarged portion 91 (103 or 113) on the distal end side of the ring member 93 (or 101, 111) abuts on the inner periphery of the decorative ring 65, so that the deformation of the decorative ring 65 inward in the radial direction is suppressed. It is characterized by being.
[0014]
In this lock structure, even if the decorative ring 65 is removed by fitting the ring member 93 (or 101, 111) having the enlarged diameter portion 91 (103 or 113) on the distal end side to the outer periphery of the cylinder lock 31. The enlarged diameter portion 91 (103 or 113) of the ring member 93 (or 101, 111) protrudes from the outer periphery of the exposed cylinder lock 31. Therefore, a sufficient allowance cannot be obtained on the outer periphery of the cylinder lock 31, and the cylinder lock 31 can be prevented from being broken by gripping and twisting the cylinder lock 31.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a lock structure according to the present invention will be described in detail with reference to the drawings.
1 is a sectional view showing a first embodiment of a lock structure according to the present invention, FIG. 2 is a front view of FIG. 1, FIG. 3 is a plan view of a key used in the lock structure of FIG. It is explanatory drawing which represented the front view of the ring member shown in (a), and represented the cross section by (b). FIG. 1 shows the position of the decorative ring when the cylinder lock is attached to the door of different thicknesses at the upper part and the lower part with the axis as the boundary.
[0016]
The cylinder lock 31 includes an inner cylinder part 37 having a key insertion hole 35 inside the outer cylinder part 33. In the cylinder lock 31, for example, a plurality of pins 39 a, 39 b, 39 c, and 39 d are arranged in the key insertion direction between the outer cylinder portion 33 and the inner cylinder portion 37. The key 41 shown in FIG. 3 has a plurality of recesses 43 and is inserted into the key insertion hole 35 to move the pins 39a, 39b, 39c, and 39d to predetermined positions in the diameter direction of the cylinder portion by the recesses 43. By making the shear line coincide with the boundary between the outer cylinder part 33 and the inner cylinder part 37, the rotation restriction between the outer cylinder part 33 and the inner cylinder part 37 by the pins 39a, 39b, 39c, 39d is released.
[0017]
The key 41 in the present embodiment includes a plurality of magnet pieces 45 in the insertion direction. The magnet piece 45 moves the plurality of magnetic movers 47 provided in the cylinder lock 31 in the cylinder diameter direction by the magnetic force, and releases the rotation restriction between the outer cylinder part 33 and the inner cylinder part 37. Therefore, by inserting the key 41 into the key insertion hole 35, the restriction by the pins 39 a, 39 b, 39 c, 39 d and the magnetic movable element 47 is released, and the inner cylinder portion 37 is moved into the outer cylinder portion 33 together with the key 41. In contrast, it can be rotated. As a result, a locking / unlocking operation force is input to a locking mechanism (not shown) provided in the door 49, and the dead bolt is moved forward and backward from the mouth of the door 49 to enable locking / unlocking.
[0018]
The cylinder lock 31 is housed in the fixed cylinder 51 so that the center of rotation coincides with the axis of the central axis of the fixed cylinder 51. The cylinder lock 31 protrudes from the outside of the fixed cylinder 51 at the upper part that accommodates the pins 39a, 39b, 39c, and 39d. The fixed cylinder 51 and the upper protruding portion of the cylinder lock 31 are covered with a cylindrical spacer 53 fitted on the outer periphery. An annular front plate 55 is fixed to the front end surface of the cylinder lock 31. The front plate 55 exposes the key insertion hole 35 of the inner cylinder portion 37 from the hole in the center portion. A circumferential groove 57 is provided in the inner periphery of the rear portion of the fixed cylinder 51, and a retaining ring 59 is fitted in the circumferential groove 57. The retaining ring 59 presses the rear end surface of the cylinder lock 31 through the cap-shaped liner 61 and prevents the cylinder lock 31 from moving rearward (rightward in FIG. 1).
[0019]
The fixed cylinder 51 inserts a rear portion into a lock insertion hole 63 formed in the door surface 49 a, and fixes a rear end portion 51 a that is a base end to a lock box (not shown) provided in the door 49. On the outer periphery of the fixed cylinder 51 projecting from the door surface 49a (that is, the spacer 53), a substantially conical decorative ring 65 with the front end side cut off is placed so that the front end portion is the front end side of the cylinder lock 31. It is inserted. The decorative ring 65 has an inner wall portion 67 whose tip is bent inward. The decorative ring 65 extrapolates the tip of the inner periphery to the outer periphery of the front plate 55, and the bent end 67 a of the inner wall portion 67 is in contact with the outer periphery of the cylinder lock 31, that is, the outer periphery of the spacer 53. As a result, the decorative ring 65 can move a little in the axial direction of the cylinder lock 31.
[0020]
A coil spring 69 is extrapolated on the outer periphery of the spacer 53. One end of the coil spring 69 is in contact with the rear end surface of the front plate 55, and the other end is in contact with the bent end 67 a of the decorative ring 65. Therefore, the decorative ring 65 abuts the rear end portion against the door surface 49a by the biasing force of the coil spring 69 that is externally supported by the cylinder lock 31. Thereby, even if the decorative ring 65 is a case where the protrusion length from the door surface 49a of the cylinder lock 31 differs, the decorative ring 65 is moved to the axial direction of the cylinder lock 31, and a rear end surface is always set to the door surface 49a. The lock can be covered to cover the lock insertion hole 63, and the same cylinder lock 31 can be attached to the door 49 having a different thickness.
[0021]
A ring member 71 is fitted on the outer periphery of the cylinder lock 31, that is, on the outer periphery of the spacer 53. The ring member 71 can be fixed and fitted to the outer periphery by various means such as fixing by screws screwed in the radial direction, fixing by an adhesive, fixing by an engagement structure, and caulking. An insertion portion 71a having an enlarged inner periphery is provided on the distal end side of the inner periphery of the ring member 71, and a bent end 67a of the decorative ring 65 is fitted into the insertion portion 71a. In addition, the ring member 71 can be made by cutting a metal such as stainless steel or cast iron.
[0022]
The ring member 71 is fitted on the outer periphery of the cylinder lock 31, and the tip of the outer periphery is in contact with the inner periphery of the decorative ring 65. The ring member 71 is in contact with the inner periphery of the decorative ring 65, thereby preventing the decorative ring 65 from deforming inward in the radial direction.
[0023]
Further, the ring member 71 is formed in a tapered shape in which the outer diameter gradually becomes smaller toward the proximal end. The tip of the tapered portion 73 is fitted into the lock insertion hole 63. Thereby, the integrated strength of the ring member 71 and the door 49, and hence the integrated strength of the cylinder lock 31 and the door 49 can be improved, and the strength of tearing off the cylinder lock 31 from the door 49 is increased. Further, since the base end portion of the ring member 71 has a tapered shape, the lock insertion hole 63 for fitting the ring member 71 is not made larger than necessary, and the fixing strength of the cylinder lock 31 with respect to the door 49 can be reduced. The covering margin by the decorative ring 65 can be sufficiently secured.
[0024]
According to the lock structure configured as described above, the ring member 71 that prevents the deformation of the decorative ring 65 inward in the radial direction by contacting the outer periphery with the inner periphery of the decorative ring 65 is the cylinder lock inside the decorative ring 65. Since it fits on the outer periphery of 31, it becomes difficult to crush and deform the decorative ring 65 using a tool, and the decorative ring 65 maintains a conical shape for sliding a tool such as a pipe wrench. Thereby, it becomes difficult to grasp the decorative ring 65, and it is possible to prevent the lock device as a whole from being broken by grasping the deformed decorative ring 65 and forcibly rotating the cylinder lock 31.
[0025]
Next, a modification of the first embodiment will be described.
FIG. 5 is a cross-sectional view showing a modification of the first embodiment, and FIG. 6 is an explanatory view showing the front view of the ring member shown in FIG. In the following description of the modification and the embodiment, the same members as those of the above-described embodiment shown in FIGS. 1 to 3 are denoted by the same reference numerals, and redundant description will be omitted. . FIG. 5 shows the position of the decorative ring when the cylinder lock is attached to the doors of different thicknesses at the upper and lower portions with the axis as the boundary. FIGS. 7 and 9 are used in the description of the following embodiments and modifications. In the cross-sectional view of FIG.
[0026]
In the lock structure according to this modification, the ring member 81 is different from that of the first embodiment. The ring member 71 is manufactured by cutting, whereas the ring member 81 has a diameter-enlarged portion 83 having a crank-shaped cross section in which the diameter of the end of the thick steel pipe is increased by, for example, pressing. The inner periphery of the enlarged diameter portion 83 is an insertion portion 83a. For example, a steel pipe having a thickness of about 2 mm with respect to an outer diameter of about 36 mm is used as the steel pipe as the material of the ring member 81. Also in this modified example, the ring member 81 is fitted on the outer periphery of the cylinder lock 31, and the tip of the enlarged diameter portion 83 is in contact with the inner periphery of the decorative ring 65. That is, like the ring member 71, the ring member 81 acts to prevent the decorative ring 65 from being deformed inward in the radial direction.
[0027]
Further, the rear end of the ring member 81 is in contact with the rear end portion 51 a of the fixed cylinder 51. Accordingly, the cosmetic ring 65 is removed, and a sufficient allowance cannot be obtained on the outer periphery of the cylinder lock 31. By gripping and twisting the cylinder lock 31, it is possible to prevent destruction of the entire locking device that tears off the cylinder lock 31. Can do.
[0028]
Therefore, even with the lock structure provided with the ring member 81, it becomes difficult to crush and deform the decorative ring 65 using a tool. By gripping the deformed decorative ring 65 and forcibly rotating the cylinder lock 31. The entire locking device can be prevented from being broken. In addition, the manufacturing can be facilitated as compared with the ring member 71 obtained by cutting.
[0029]
Next, a second embodiment of the lock structure according to the present invention will be described.
FIG. 7 is a cross-sectional view showing a second embodiment of the lock structure according to the present invention, and FIG. 8 is an explanatory view showing the front view of the ring member shown in FIG. is there.
[0030]
In the lock structure according to this embodiment, the ring member 93 having the enlarged diameter portion 91 on the distal end side is fitted on the outer periphery of the cylinder lock 31 between the inner periphery of the decorative ring 65 and the outer periphery of the cylinder lock 31. Features. The enlarged diameter portion 91 is formed by expanding the tip of the ring member 93 in a flange shape. Further, the ring member 93 has a collar portion 95 whose rear end portion is bent inward. The hook portion 95 is engaged with the rear end surface of the cylinder lock 31 to prevent the ring member 93 from moving in the forward direction (left direction in FIG. 7). Further, the flange portion 95 abuts on the rear end portion 51a of the fixed cylinder 51, that is, is substantially clamped between the rear end surface of the cylinder lock 31 and the rear end portion 51a. Further, the ring member 93 has a fixing hole 96, and the movement with respect to the cylinder lock 31 is also prevented by engaging the fixing hole 96 with the spacer 53 or the cylinder lock 31 itself. The ring member 93 is obtained by, for example, pressing a steel pipe. For example, a steel pipe having a thickness of about 1 mm with respect to an outer diameter of about 36 mm is used.
[0031]
According to this lock structure, even if the decorative ring 65 is removed by fitting the ring member 93 having the flange-shaped enlarged diameter portion 91 on the front end side to the outer periphery of the cylinder lock 31, even if the decorative ring 65 is removed, The enlarged diameter portion 91 of the ring member 93 protrudes from the outer periphery of 31. Therefore, a sufficient allowance cannot be obtained on the outer periphery of the cylinder lock 31, and the cylinder lock 31 can be prevented from being broken by gripping and twisting the cylinder lock 31.
[0032]
Next, Modification 1 of the second embodiment will be described.
FIG. 9 is a cross-sectional view showing a first modification of the second embodiment, and FIG. 10 is an explanatory view in which the front view of the ring member shown in FIG. 9 is (a) and the cross-section is (b).
In the lock structure according to this modification, the ring member 101 is different from the second embodiment. That is, the tip of the ring member 93 is formed by the flange-shaped enlarged diameter portion 91, while the ring member 101 is formed by the enlarged diameter portion 103 having a crank-shaped cross section. Further, the ring member 101 has a flange portion 95 at the rear end, like the ring member 93. Further, the ring member 101 has a fixing hole 96, and the movement with respect to the cylinder lock 31 is also prevented by engaging the fixing hole 96 with the spacer 53 or the cylinder lock 31 itself. This ring member 101 is also obtained, for example, by pressing a steel pipe. For example, a steel pipe having a thickness of about 1 mm with respect to an outer diameter of about 36 mm is used.
[0033]
According to this lock structure, as in the second embodiment using the ring member 93, even if the decorative ring 65 is removed, the ring member 101 can be removed from the outer periphery of the exposed cylinder lock 31. Since the enlarged diameter portion 103 protrudes, it is not possible to obtain a sufficient allowance, and even if the cylinder lock 31 is gripped, the entire locking device can be prevented from being broken. In addition, since the enlarged diameter portion 103 is bent in a cross-sectional crank shape, the strength in the axial direction and the radial direction of the enlarged diameter portion 103 can be increased.
[0034]
Next, Modification 2 of the second embodiment will be described.
FIG. 11 is a cross-sectional view showing a second modification of the second embodiment, and FIG. 12 is an explanatory view showing the front view of the ring member shown in FIG. 11 with (a) and the cross-section with (b).
In the lock structure according to this modification, the ring member 111 is different from that of the second embodiment. That is, while the tip of the ring member 93 is formed by the flange-shaped enlarged diameter portion 91, the ring member 111 has a substantially C-shaped cross section in which the tip is folded outward. It is formed by the enlarged diameter portion 113. Similarly to the ring member 93, the ring member 111 has a flange portion 95 at the rear end. Further, the ring member 111 has a fixing hole 96, and the movement with respect to the cylinder lock 31 is also prevented by engaging the fixing hole 96 with the spacer 53 or the cylinder lock 31 itself. The ring member 111 is also obtained, for example, by pressing a steel pipe. For example, a steel pipe having a thickness of about 1 mm with respect to an outer diameter of about 36 mm is used.
[0035]
According to this lock structure, as in the second embodiment using the ring member 93, even if the decorative ring 65 is removed, the ring member 111 can be removed from the outer periphery of the exposed cylinder lock 31. Since the enlarged diameter portion 113 protrudes, a sufficient allowance cannot be obtained, and even if the cylinder lock 31 is gripped, the entire locking device can be prevented from being broken. In addition, since the enlarged diameter portion 113 is bent in a C-shaped cross section, the strength in the axial direction and the radial direction can be increased. In particular, compared with the ring member 93 according to the second embodiment and the ring member 101 according to the first modification, the expanded diameter portion 113 can increase the strength against the compressive force from the outside in the radial direction. The effect which suppresses the deformation | transformation of the decorative ring 65 similar to the form of can also be acquired.
[0036]
【The invention's effect】
As described above, according to the lock structure according to the present invention, the ring member that prevents the deformation of the decorative ring inward in the radial direction by contacting the outer periphery with the inner periphery of the decorative ring, the inner periphery of the decorative ring and the cylinder Since it is placed between the outer periphery of the lock and fixed and fitted on the outer periphery of the cylinder lock, it becomes difficult to deform and deform the decorative ring using a tool, and the decorative ring slides a tool such as a pipe wrench. Maintain the conical shape that you want. As a result, it becomes difficult to grasp the decorative ring, and it is possible to prevent the lock device from being broken by gripping the deformed decorative ring and forcibly rotating the cylinder lock.
[0037]
Further, according to the lock structure of the present invention, the base end portion of the ring member is formed in a tapered shape with the outer diameter gradually decreasing toward the base end, and the tip end of the taper portion is inserted into the lock insertion hole. Therefore, the ring member can be directly fitted into the lock insertion hole of the door to improve the integrated strength between the ring member and the door, and consequently the integrated strength between the cylinder lock and the door. Thereby, the tearing strength from the door of a cylinder lock increases. In addition, since the base end portion of the ring member becomes a taper portion, the lock insertion hole for fitting the ring member is not enlarged more than necessary, and the fixing strength of the cylinder lock to the door is not reduced, The covering allowance by the decorative ring can be sufficiently secured.
[0038]
Further, according to the lock structure of the present invention, the ring member having the enlarged diameter portion on the front end side is fitted on the outer periphery of the cylinder lock between the inner periphery of the decorative ring and the outer periphery of the cylinder lock, and the rear end portion Since the collar portion formed on the cylinder lock is hooked on the rear end surface of the cylinder lock, even if the decorative ring is removed, the expanded portion of the ring member protrudes from the outer periphery of the exposed cylinder lock. It is not possible to obtain a sufficient allowance on the outer periphery of the lock, and by squeezing the cylinder lock or the like, it is possible to prevent destruction of the entire lock device that tears off the cylinder lock. Moreover, the strength against the compressive force from the outside in the radial direction can be increased by the enlarged diameter portion, and the effect of suppressing the deformation of the decorative ring can be obtained.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a first embodiment of a lock structure according to the present invention.
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a plan view of a key used in the lock structure of FIG. 1;
4A and 4B are explanatory views showing a front view and a cross section of the ring member shown in FIG.
FIG. 5 is a cross-sectional view illustrating a modification of the first embodiment.
6 is an explanatory view showing a front view of the ring member shown in FIG. 5 in (a) and a section in (b).
FIG. 7 is a cross-sectional view showing a second embodiment of the lock structure according to the present invention.
8 is an explanatory view showing the front view of the ring member shown in FIG. 7 in (a) and the cross section in (b).
FIG. 9 is a cross-sectional view illustrating a first modification of the second embodiment.
10A and 10B are explanatory views illustrating a front view and a cross-section of the ring member illustrated in FIG.
FIG. 11 is a cross-sectional view illustrating a second modification of the second embodiment.
12A and 12B are explanatory views showing a front view and a cross-section of the ring member shown in FIG.
FIG. 13 is a cross-sectional view of a conventional lock structure.
[Explanation of symbols]
31 ... Cylinder lock 49 ... Door 49a ... Door surface 63 ... Lock insertion hole 65 ... Cosmetic ring 69 ... Coil spring 71, 93, 101, 111 ... Ring member 73 ... Tapered part 91, 103, 113 ... Expanded part

Claims (3)

The base end of the cylinder lock is fixed to a lock box provided in the door through a lock insertion hole drilled in the door surface, and the outer periphery of the cylinder lock protruding from the door surface has a substantially conical shape opening the front end side. The decorative ring is extrapolated so that the front end portion is the front end side of the cylinder lock, and the rear end portion of the decorative ring is brought into contact with the door surface by the biasing force of the coil spring that is externally supported by the cylinder lock. In the lock structure,
The decorative ring has an inner wall portion where the tip portion is bent inward and the coil spring is disposed in the interior, the bent end of the inner wall portion is brought into contact with the outer periphery of the cylinder lock, and is brought into contact with the other end of the coil spring. Under the influence,
It is arranged in the space between the inner periphery of the decorative ring and the outer periphery of the cylinder lock, and the proximal end side is fitted between the outer periphery of the cylinder lock and the inner periphery of the lock insertion hole, The side is provided with an insertion part with an expanded inner periphery so that the bent end of the decorative ring can be freely inserted, and fixed to the outer periphery of the cylinder lock by a fixing means, and the decorative ring is attached from the outer periphery of the cylinder lock. A ring member arranged to support from the inner periphery is provided,
A lock structure characterized in that deformation of the decorative ring inward in the radial direction is prevented by contacting the outer periphery of the ring member on the front end side with the inner periphery of the decorative ring. The lock structure according to claim 1,
A lock structure characterized in that a base end portion of the ring member is formed in a tapered shape with an outer diameter gradually decreasing toward the base end, and a tip end of the taper portion is fitted into the lock insertion hole. The base end of the cylinder lock is fixed to a lock box provided in the door through a lock insertion hole drilled in the door surface, and the outer periphery of the cylinder lock protruding from the door surface has a substantially conical shape opening the front end side. The decorative ring is extrapolated so that the front end portion is the front end side of the cylinder lock, and the rear end portion of the decorative ring is brought into contact with the door surface by the biasing force of the coil spring that is externally supported by the cylinder lock. In the lock structure,
The decorative ring has an inner wall portion where the tip portion is bent inward and the coil spring is disposed in the interior, the bent end of the inner wall portion is brought into contact with the outer periphery of the cylinder lock, and is brought into contact with the other end of the coil spring. Under the influence,
The collar is disposed in the space between the inner periphery of the decorative ring and the outer periphery of the cylinder lock, and a hook portion formed by bending the rear end portion inward is hooked on the rear end surface of the cylinder lock. The decorative ring has a diameter-enlarged portion that is fitted to the outer periphery of the ring and is engaged with the cylinder lock by a fixing hole on a side portion, and is formed to expand outward at a rear position of the bent end. It protrudes toward the inner periphery, the rear end portion is located in the lock insertion hole, and the enlarged diameter portion is protruded from the door surface, and extends from the outer periphery of the cylinder lock toward the inner periphery of the decorative ring. A ring member on which the enlarged diameter portion is arranged to be provided;
A lock structure characterized in that deformation of the decorative ring inward in the radial direction is suppressed by the outer periphery of the front end side of the ring member coming into contact with the inner periphery of the decorative ring.

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