JP2004278027A - Thumb-turn - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a thumb-turn capable of effectively preventing the turning of the thumb-turn. <P>SOLUTION: This thumb-turn is equipped with a thumb-turn case 2, an adjusting ring 3 which is insertably/extractably coupled to the thumb-turn case 2, a thumb-turn body 4 which is inserted into the adjusting ring 3 and the thumb-turn case 2, an elastic means 6 which is interposed between the adjusting ring 3 and the thumb-turn body 4, and a locking means 7 for restricting the movement of the thumb-turn body 4. The thumb-turn body 4 is equipped with a pin 404 which is protruded in such a manner as to be longitudinally orthogonal to a joint part 402 disabling engagement with a cam when a position of an engaging protrusion of the cam is changed. The thumb-turn case 2 is equipped with an insertion part 205 into which the adjusting ring 3 can be inserted and fitted, a through-hole 204 through which the thumb-turn body 4 can pass, and a case-side meshing part 201. Additionally, the adjusting ring 3 is equipped with a ring-side through-hole 305 through which the thumb-turn body 4 can pass, a groove 306 through which the pin 404 can pass, and a ring-side meshing part 303 capable of meshing with the meshing part 201. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a thumb-turn used for a lock, and more particularly, to a thumb-turn capable of coping with a so-called thumb-turn rotation by making a thumb-turn body movable forward and backward.
[0002]
[Prior art]
Generally, a lock has a case box inserted into the door, and a cam is rotatably built in the case box, and the dead bolt is advanced and retracted by turning the cam to lock the lock. Alternatively, unlocking is possible. In this case box, a cylinder lock is mounted from the outdoor side, and a thumb turn is mounted from the indoor side, and a joint part in the cylinder lock and a tip part in the thumb turn are engaged with the cam, respectively. By turning the key plate from the outdoors and by turning the thumb turn knob from the indoor side, the dead bolt is turned to enable locking and unlocking.
[0003]
That is, FIG. 13 is a diagram showing this relationship, in which 31 is a case box. The case box 31 is provided with a dead bolt 33 and a latch 37 so as to advance and retreat, and a cam 32 connected to the dead bolt 33 is rotatably provided. The dead bolt can be moved forward and backward, and the latch 37 can be freely moved forward and backward by operating the lever 40 attached to the case box.
[0004]
A thumb turn 39 is mounted on the case box 31 from the indoor side, and a cylinder lock 38 is mounted on the case box 31 from the outdoor side, and a distal end of the thumb turn 39 and a joint of the cylinder lock are connected to the cam 32, respectively. Thus, from the indoor side, the thumb bolt 3901 is turned to operate the advance / retreat of the deadbolt 33 to enable locking or unlocking, and from the outdoor side, a key plate inserted into a cylinder lock is provided. By rotating (not shown), the dead bolt 33 is advanced or retracted to enable locking or unlocking.
[0005]
Here, FIG. 14 is a view showing the front of the cam 32. In general, the cam 32 has a substantially cylindrical shape, and engagement projections 34 are formed on both end surfaces along the longitudinal direction. ing.
[0006]
On the other hand, a joint portion 35 engageable with the engaging projection 34 is formed at the tip of the cylinder lock. When the cylinder lock is mounted on the case box, as shown in FIG. The joint 35 is arranged so that it can be engaged with the engagement protrusion 34 of the cam 32. Thus, by rotating the key plate, the joint portion 35 is rotated, thereby enabling the dead bolt 33 to advance and retreat from the outdoor side.
[0007]
On the other hand, the tip end portion 36 of the thumb turn mounted on the case box 31 from the indoor side is also shaped to be engageable with the engagement protrusion 34 of the cam 32, and when the thumb turn is mounted on the case box, As shown in FIG. 16, the tip end 36 of the thumb turn is engaged with the engagement projection 34 of the cam 32, whereby the thumb turn is rotated, so that the dead bolt 33 is removed from the indoor side. It is possible to go back and forth.
[0008]
By the way, with the increase of picking in recent years, various types of security cylinder locks corresponding to this have started to be provided, but by using a method called “thumb turn” as an unauthorized unlocking that cannot be performed with this security cylinder lock. Damage is increasing.
[0009]
Here, the "thumb turn" is to open a hole in the door with a drill or the like, point a special tool or the like to the indoor side through this hole, and directly rotate the thumb turn knob with this tool to unlock. Is the way.
[0010]
As described above, according to this method, which has been increasing recently, there is a problem that even if a picking-compatible cylinder lock is used, it cannot be handled because the thumb is turned by operating the thumb-turn knob from the indoor side.
[0011]
In this regard, a method of covering the periphery of the thumb turn with a cap or the like to oppose this "thumb turn" is considered in part, but even if this method is adopted, the cap may be removed. It is hard to say that it is an effective response because there is a possibility that the thumb turn will be turned.
[0012]
Further, as a thumb turn capable of preventing such "thumb turn", a shaft-side clutch plate fixed to a thumb-turn shaft, a knob-side clutch plate fixed to a thumb-turn knob and capable of pressing against the shaft-side clutch, and a shaft-side clutch By using a clutch spring that urges the plate and the knob-side clutch plate in the separating direction, the knob is pushed in the axial direction that is the door direction, and unless both clutches are in the pressed state, the rotation of the knob can be performed by the thumb-turn shaft. There is disclosed a technique that is not transmitted to the public.
[0013]
[Patent Document 1]
JP-A-2003-56220 (FIG. 1)
[0014]
[Problems to be solved by the invention]
However, in this method, there is a problem that the "turning of the thumb turn" cannot be effectively prevented when the thumb turn knob can be pushed in the door direction by some method.
[0015]
Therefore, an object of the present invention is to provide a thumb turn capable of effectively preventing a thumb turn from rotating.
[0016]
[Means for Solving the Problems]
The thumb tern of the present invention is:
A thumb turn attached to a lock case box,
A thumb turn case attached to the case box,
An adjusting ring that is connected to the thumb turn case so as to be able to be inserted and withdrawn,
A thumb-turn body inserted into the adjusting ring and the thumb-turn case so as to be movable forward and backward;
Resilient means interposed between the adjusting ring and the thumb-turn body, for urging the adjusting ring and the thumb-turn body in directions to repel each other;
Locking means for restricting movement of the thumb-turn main body toward the non-case box side,
The thumb turn main body is engageable with a cam provided in a case box provided at a tip end thereof, and a cam is rotated when the position of the engagement protrusion is changed by rotating the cam by an arbitrary angle. And a pin protruding in a direction perpendicular to the longitudinal direction thereof, and the joint does not engage with the cam in a normal stationary state. It is inserted in the adjustment ring and the thumb turn case so as to be able to advance and retreat in the arrangement,
The thumb-turn case includes a ring insertion portion that can be inserted in the vicinity of the distal end of the adjustment ring, a through-hole that can penetrate the thumb-turn body, and a case-side meshing portion formed at an upper end thereof.
The adjusting ring includes a ring-side through-hole that can penetrate the thumb-turn body, a passage groove that is provided continuously with the ring-side through-hole, and that can pass a pin protruding from the thumb-turn body, and the case-side meshing portion. And a ring-side meshing portion which can mesh with the ring.
[0017]
In the thumb turn of the present invention, by interposing elastic means between the adjustment ring and the thumb turn main body, the adjustment ring and the thumb turn main body repel each other.
In the normal state, the engagement between the thumb turn body and the cam is prevented.
[0018]
Therefore, the cam cannot be turned only by simply turning the thumb-turn body, and in order to turn the cam, the thumb-turn body must be pushed into the case box side while opposing the urging force of the elastic means. Therefore, even when a special tool or the like is used, it is not easy to rotate the cam by operating the thumb turn from the outdoor side, and it is possible to prevent the thumb turn from being performed.
[0019]
Further, in the present invention, in a normal state, the engagement between the thumb turn body and the cam is prevented, and in order to turn the cam, the thumb turn body is moved toward the case box while opposing the urging force of the elastic means. In addition to having to push the joint, the joint provided at the tip of the thumb turn main body can be engaged with a cam provided inside the case box, and the cam has turned by an arbitrary angle. In this case, the shape is such that engagement with the cam is impossible, so if the position of the engagement protrusion of the cam is changed by locking from outside by the key plate, the thumb-turn body is moved to the case box side. Even if it is pushed in, it cannot be engaged with the cam. Therefore, even if the thumb-turn body can be pushed into the case box by any method after locking by the key plate, the thumb-turn body cannot be engaged with the cam. Locking is impossible.
[0020]
At this time, in the present invention, a pin protrudes from the thumb turn body in a direction orthogonal to the longitudinal direction thereof, and a passage groove through which the pin can pass is formed in the adjustment ring, and the pin passes through the passage groove. Since the thumb-turn body can be pushed in only when it is in a possible position, the pin position of the thumb-turn body changes when the thumb-turn body is rotated so that the joint can be engaged with the cam. As a result, the pin cannot pass through the passage groove, so that the thumb-turn body cannot be pushed into the case box side, which also makes it impossible to perform unauthorized unlocking by turning the thumb-turn. become.
[0021]
On the other hand, in the present invention, a case-side meshing portion is formed at an upper end portion of the thumb-turn case, and a ring-side meshing portion that can mesh with the case-side meshing portion is formed on an adjustment ring. By engaging the engagement portion with the ring-side engagement portion, the adjustment ring is connected to the thumb turn case so as to be able to be inserted and withdrawn, and the rotation of the adjustment ring is disabled, but it is opposed to the urging force of the elastic means. By moving the adjustment ring to the side opposite to the case box and releasing the engagement between the case-side meshing portion and the ring-side meshing portion, the adjustment ring can be made rotatable. When the position of the engaging projection of the cam is changed by locking from outside, the adjusting ring is moved to the opposite case box side in opposition to the biasing force of the elastic means, and the case side meshing portion and the ring side meshing portion are moved. Disengage After that, by rotating the adjustment ring to a position where the thumb turn main body can be pushed into the case box side at a position where it can be engaged with the changed engagement projection of the cam, it can be unlocked properly from the indoor side. It becomes possible.
[0022]
【Example】
FIG. 1 is a longitudinal sectional view for explaining the structure of the thumb turn of the present embodiment. FIG. 2 is a front view of the thumb turn of the present embodiment. Further, FIG. 3 is an exploded view of the thumb-turn of the present embodiment. In FIG. 3, reference numeral 1 denotes a thumb-turn of the present embodiment.
[0023]
In the thumb turn 1 of this embodiment, an adjusting ring 3 is detachably connected to a thumb turn case 2 which is mounted on a case box inserted inside the door when used. 2, the thumb-turn body 4 penetrates freely. A spring 6 as elastic means is interposed between the adjusting ring 3 and the thumb-turn main body 4, and the adjusting ring 3 and the thumb-turn main body 4 repel each other by the urging force of the spring 6. While being biased in the direction, the thumb turn main body 4 is in a position where the joint portion does not engage with the cam in the stationary state. Further, an E-ring 7 as a locking means is mounted on the thumb turn body 4, thereby restricting the movement of the thumb turn body 4 to the side opposite to the case box side, and adjusting the adjustment ring 3 and the stationary ring 3 in a stationary state. The position of the thumb turn body 4 is fixed.
[0024]
Here, the thumb-turn case 2 will be described. The thumb-turn case 2 has a substantially cylindrical shape, and a case-side meshing portion 201 having an uneven shape is formed at an upper end portion. This portion is used as a screwing portion 202 for screwing a decorative cover 5 described later.
[0025]
The side facing the case-side meshing portion 201 is a connecting portion 203 connected to the case box, and the shape thereof is an arbitrary shape that can correspond to the shape of the thumb-turn mounting portion in the case box. .
[0026]
A small-diameter thumb-turn through hole 204 through which the thumb-turn main body 4 can penetrate is formed inside the thumb-turn case 2. An insertion hole 205 is formed, and a locking portion 206 for locking the adjustment ring 3 is formed above the adjustment ring insertion hole 205.
[0027]
Next, the adjusting ring 3 in the present embodiment has a substantially cylindrical shape, and the vicinity of the lower end thereof is formed into an insertion portion 301 having a diameter capable of being inserted into the adjustment ring insertion hole 205. A shoulder 307 is locked to the locking portion 206 by inserting the insertion portion 301 into the adjustment ring insertion hole 205.
[0028]
The upper end of the adjustment ring 3 has a slightly thicker outer diameter to make the knob portion 302 slightly larger in thickness, and the upper end portion of the adjustment ring 3 is continuous with the knob portion 302, and the lower end portion has A ring-side meshing portion 303 that can mesh with the case-side meshing portion 201 is formed.
[0029]
Further, a shelf 304 is formed at an arbitrary position on the inner peripheral portion of the adjustment ring 3, and a ring-side through hole having a diameter through which the thumb-turn main body 4 can penetrate is provided at a substantially central portion of the shelf 304. 305 are formed.
[0030]
Here, FIG. 6 is a view showing a plane of the adjustment ring 3. In this embodiment, an elongated passage groove 306 is formed continuously with the ring side through hole 305.
[0031]
Next, the thumb-turn body 4 will be described. The thumb-turn body 4 in this embodiment includes a substantially cylindrical shaft portion 401, and a joint portion 402 that is engaged with the cam continuously with the shaft portion 401. Is formed.
[0032]
Here, the joint 402 will be described. In general, the cam is rotated by the tip of the thumb turn or the joint of the cylinder lock, so that the cam is engaged with the tip of the thumb turn and the joint of the cylinder lock. The projection is provided (34 in FIGS. 14 to 16). Therefore, the joint portion 402 in this embodiment is formed in a shape that can engage with the cam only at a specific position when the thumb turn main body 4 is rotated. Specifically, as shown in FIGS. 7 and 8, a pair of thumb-turn side engagement projections 403 that can be fitted between the engagement projections formed on the cam are formed at opposing portions, thereby As shown in FIG. 8, the joint 402 can be engaged with the cam only when the engagement projection 403 is fitted between the engagement projections on the cam.
[0033]
Next, a large-diameter pedestal portion 405 and a thumb-turn knob 406 connected to the pedestal portion 405 are continuously provided on the side of the shaft portion 401 opposite to the joint portion of the thumb-turn main body 4. It is rotatable.
[0034]
Further, a pin 404 protrudes in the direction perpendicular to the longitudinal direction of the shaft 401 near the pedestal 405 in the shaft 401, and the pin 404 penetrates the ring side of the adjusting ring 3. It is possible to pass through a passage groove 306 formed continuously with the hole 305.
[0035]
The thumb-turn main body 4 thus configured is configured such that the shaft portion 401 passes through the case-side through-hole 204 in the thumb-turn case 2 and the ring-side through-hole 305 in the adjustment ring 3 so that the pedestal portion 405 is The adjustment ring 3 is placed on the shelf 304, and a spring 6 is interposed between the shelf 304 and the pedestal 405.
[0036]
When the thumb-turn body 4 is mounted, an E-ring 7 as locking means is mounted in an engagement groove 407 formed between the shaft portion 401 and the joint portion 402, and the E-ring 7 is penetrated through the case. It is locked to the periphery of the lower end of the hole 204, thereby fixing the position of the thumb-turn body 4 in a stationary state and restricting the movement of the thumb-turn body 4 to the side opposite to the case box. Is also fixed.
[0037]
Further, in the normal state, the joint portion 402 of the thumb-turn main body 4 is not engaged with the cam, and in the normal state, the pin 404 formed on the thumb-turn main body 4 is smaller than the shelf 304 of the adjustment ring 3. The thumb-turn body 4 is mounted in an arrangement that is located on the side opposite to the case box and does not pass through the passage groove 306.
[0038]
In FIG. 7, reference numeral 408 denotes a long groove formed in the shaft 401. The long groove 408 is used for giving a sense of moderation when the thumb turn main body 4 is rotated to a specific position. That is, in the present embodiment, a small hole 207 communicating with the outside is formed in the inner periphery of the case-side through-hole 204, the small ball 8 is inserted into the small hole 207, and the small ball 8 is Is pressed by the screw 10, while the small hole 8 is prevented from dropping toward the case-side through-hole 204 by the outer peripheral portion of the shaft portion 401. When the turning position of the thumb-turn body 4 with respect to the adjustment ring 3 is at a position where the pin 404 of the thumb-turn body 4 can pass through the passage groove 306 formed in the adjustment ring 3, the small ball 8 is slightly elongated in the long groove portion 402. The long groove portion 402 is formed so that it can be buried in the inside. Therefore, when the thumb turn main body 4 is rotated to reach a position where the pin 404 can pass through the passage groove 306, a part of the small ball 8 enters the long groove portion 402, thereby giving a sense of moderation. It is.
[0039]
1 to 3, reference numeral 5 denotes a decorative cover. In this embodiment, a decorative cover 5 having a substantially trapezoidal side surface and a threaded inner peripheral surface is used as a decorative cover. It is screwed into the part.
[0040]
Next, the operation of the thus-constructed thumb-turn 1 according to the present embodiment will be described. FIG. 9 is a view showing a stationary state in which the thumb-turn 1 according to the present embodiment is mounted on the case box 11. The joint portion 402 of the main body 4 is not engaged with the cam 12, so that even if the thumb turn main body 4 is rotated, it is impossible to unlock or lock.
[0041]
On the other hand, assuming that the pin 404 passes through the passage groove 306 by pushing the thumb-turn main body 4 into the case box 11 side in the state of FIG. 9 and the joint 402 of the thumb-turn main body 4 can be engaged with the cam 12, By pushing the main body 4, as shown in FIG. 10, the joint portion 402 is engaged with the cam 11, whereby the thumb turn main body 4 can be locked or unlocked by turning.
[0042]
As described above, in the thumb turn of the present embodiment, first, the thumb turn cannot be unlocked unless the thumb turn main body 4 is pushed into the case box 11 side. Therefore, it is difficult to easily perform the unauthorized unlocking by the thumb turn method. It is.
[0043]
Next, assuming a case where the lock is performed using a key plate from the outdoor side in the state of FIG. Generally, in the case of locking or unlocking, the cam 12 rotates about 90 degrees, and accordingly, the position of the engaging projection 1201 changes its angle by about 90 degrees.
[0044]
In this case, even when the thumb-turn main body 4 is pushed into the case box side, the joint portion 402 cannot be engaged with the cam 12, so that the unlocking is impossible even from the indoor side.
[0045]
That is, in FIG. 11, (A) and (C) are states before locking, and in this state, it is assumed that the joint portion 402 indicated by a dotted line can be engaged with the engagement protrusion 1201 of the cam 12. .
[0046]
Then, as described above, the joint portion 402 in this embodiment has the engagement protrusions 403 that can be fitted between the engagement protrusions 1201 formed on the cam 12 only at two opposing positions. When the key plate is rotated while the cam 12 and the joint portion 402 are engaged and the cam 12 is rotated by the joint 13 of the cylinder lock, the cam 12 and the cam 12 are rotated unless the rotation angle is about 180 degrees. The joint 402 cannot be engaged. Therefore, when the position of the engagement protrusion 1201 of the cam 12 is changed by about 90 degrees by locking with the key plate (FIG. 11B), as shown by a dotted line in FIG. Even when 4 is pushed in, the engagement protrusion 403 of the joint 402 hits the engagement protrusion 1201 of the cam 12, so that the joint 402 and the cam 12 cannot be engaged.
[0047]
At this time, the thumb turn 1 of this embodiment is configured such that the thumb turn main body 4 can be pushed into the case box side only at a position where the pin 404 can pass through the passage groove 306 in relation to the adjustment ring 3. Therefore, in the state shown in FIG. 11D, when the thumb turn main body 4 is rotated so that the joint portion 402 can be engaged with the cam 112, the pin position is changed, so that the pin position is changed. Since the 404 cannot pass through the passage groove 306, the thumb-turn main body 4 cannot be pushed into the case box 11 side.
[0048]
As described above, in the thumb turn 1 of the present embodiment, attention is paid to the fact that the position of the engagement protrusion 1201 on the cam 12 is changed by locking, and in the case of locking by the key plate, the engagement between the cam and the joint portion is not performed. In addition, since the position where the thumb-turn body 4 can be pushed in relation to the adjustment ring 3 is fixed, pushing the thumb-turn body 4 into the case box side in the case of locking with a key plate is required. In the case where the thumb turn main body 4 is turned by the method, the thumb turn main body 4 cannot be pushed into the case box side even when the thumb turn main body 4 is rotated so as to be in a position where it can be engaged with the joint portion 402 cam 112. Therefore, it is possible to reliably prevent unauthorized unlocking.
[0049]
Next, a case where a normal unlocking method is performed from the indoor side after locking by the key plate will be described. In such a case, in the state shown in FIG. The adjustment ring 3 is pulled up to the case box side while opposing the biasing force of No. 6, and the engagement between the adjustment ring 3 and the thumb turn case 2 is released. After that, the adjustment ring 3 is rotated about 90 degrees in the same direction as the rotation direction of the cam 12, and the thumb turn body 4 is also rotated about 90 degrees in the same direction.
[0050]
Then, by turning the thumb-turn body 4, the joint portion 402 can be brought into a position where it can be engaged with the cam 12, and by turning of the adjustment ring 3, the thumb-turn body 4 can be pushed in this state. Therefore, in this state, it is possible to unlock the thumb-turn body 4 by pushing it in and rotating. For this purpose, it is necessary to perform a series of operations of first pulling up the adjustment ring 3, rotating the adjustment ring 3 in a state where the adjustment ring 3 is pulled up, and then turning the thumb turn body 4 and pushing it into the case box. For this reason, it is difficult to make a hole in the door and perform the operation from the outside through the hole.
[0051]
As described above, according to the thumb-turn of the present embodiment, it is possible to sufficiently counter the so-called "thumb-turn" that has recently increased.
[0052]
【The invention's effect】
The thumb turn of the present invention is embodied in the form described above, and has the following effects.
[0053]
In the thumb turn of the present invention, by interposing elastic means between the adjustment ring and the thumb turn main body, the adjustment ring and the thumb turn main body are urged in directions to repel each other, and in a normal state, the thumb turn main body is Because the engagement with the cam is prevented, it is not possible to turn the cam simply by turning the thumb-turn body, and to turn the cam, the thumb-turn body must be turned against the case box while opposing the biasing force of the elastic means. Must be pushed into. Therefore, even when a special tool or the like is used, it is not easy to rotate the cam by operating the thumb turn from the outdoor side, and it is possible to prevent the thumb turn from being performed.
[0054]
Further, in the present invention, in a normal state, the engagement between the thumb turn body and the cam is prevented, and in order to turn the cam, the thumb turn body is moved toward the case box while opposing the urging force of the elastic means. In addition to having to push the joint, the joint provided at the tip of the thumb turn main body can be engaged with a cam provided inside the case box, and the cam has turned by an arbitrary angle. In this case, the shape is such that engagement with the cam is impossible, so if the position of the engagement protrusion of the cam is changed by locking from outside by the key plate, the thumb-turn body is moved to the case box side. Even if it is pushed in, it cannot be engaged with the cam. Therefore, even if the thumb-turn body can be pushed into the case box by any method after locking with the key plate, the thumb-turn body cannot be engaged with the cam. Locking is impossible.
[0055]
At this time, in the present invention, a pin protrudes from the thumb turn body in a direction orthogonal to the longitudinal direction thereof, and a passage groove through which the pin can pass is formed in the adjustment ring, and the pin passes through the passage groove. Since the thumb-turn body can be pushed in only when it is in a possible position, the pin position of the thumb-turn body changes when the thumb-turn body is rotated so that the joint can be engaged with the cam. As a result, the pin cannot pass through the passage groove, so that the thumb-turn body cannot be pushed into the case box side, which also makes it impossible to perform unauthorized unlocking by turning the thumb-turn. become.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view for explaining an embodiment of a thumb turn according to the present invention.
FIG. 2 is a front view illustrating an embodiment of a thumb-turn according to the present invention.
FIG. 3 is a diagram showing a disassembled state of the embodiment of the thumb turn of the present invention.
FIG. 4 is a longitudinal sectional view of a thumb-turn case in a thumb-turn embodiment of the present invention.
FIG. 5 is a longitudinal sectional view of an adjusting ring in the embodiment of the thumb turn of the present invention.
FIG. 6 is a plan view of an adjusting ring in the embodiment of the thumb turn of the present invention.
FIG. 7 is a diagram showing a thumb-turn body in a thumb-turn embodiment of the present invention.
FIG. 8 is a view for explaining a joint portion of a thumb-turn body in a thumb-turn embodiment of the present invention.
FIG. 9 is a diagram for explaining the operation of the embodiment of the thumb turn of the present invention.
FIG. 10 is a diagram for explaining the operation of the embodiment of the thumb turn of the present invention.
FIG. 11 is a diagram for explaining the operation of the embodiment of the thumb turn of the present invention.
FIG. 12 is a diagram for explaining the operation of the embodiment of the thumb turn of the present invention.
FIG. 13 is a diagram for explaining a general lock.
FIG. 14 is a view showing the front of a cam in a general lock.
FIG. 15 is a view for explaining an engagement relationship between a cam and a cylinder lock in a general lock.
FIG. 16 is a view for explaining an engagement relationship between a cam and a thumb turn in a general lock.
[Explanation of symbols]
1 Samtern
2 Sam Turn Case
201 Case side meshing part
202 screw part
203 connection
204 Case side through hole
205 Adjusting ring insertion hole
206 Locking part
207 stoma
3 Adjustment ring
301 insertion section
302 knob
303 Ring side meshing part
304 shelves
305 Ring side through hole
306 Passage groove
4 Samturn body
401 Shaft
402 Joint
403 engaging projection
404 pin
405 pedestal
406 Thumb Turn Knob
407 engagement groove
408 long groove
5 Makeup cover
6 Spring
7 E-ring
8 small balls
9 Spring
10 screws
11 Case box
12 cams
1201 engagement projection
13 Joints in cylinder locks

Claims (4)

A thumb turn attached to a lock case box,
A thumb turn case (2) attached to the case box,
An adjusting ring (3) that is connected to the thumb turn case (2) so as to be insertable and removable;
A thumb-turn body (4) inserted into the adjusting ring (3) and the thumb-turn case (2) so as to be movable forward and backward;
Elastic means (6) interposed between the adjusting ring (3) and the thumb-turn body (4) for urging the adjusting ring (3) and the thumb-turn body (4) in directions repelling each other; ,
Locking means (7) for restricting the movement of the thumb turn body (4) toward the case box side;
The thumb-turn body (4) is engageable with a cam provided in a case box provided at a tip end thereof, and when the cam is rotated by an arbitrary angle to change the position of the engagement protrusion. Has a joint portion (402) formed in a shape that makes it impossible to engage with the cam, and a pin (404) protruding in a direction perpendicular to the longitudinal direction thereof, and has a normal stationary state. In, the joint (402) is inserted into the adjustment ring (3) and the thumb turn case (2) so as to be able to advance and retreat in a disposition that does not engage with the cam,
The thumb turn case (2) includes a ring insertion portion (205) that can be inserted near the tip of the adjustment ring (3), a through hole (204) that can penetrate the thumb turn body (4), and an upper end thereof. And a case-side meshing portion (201) formed in the portion.
The adjusting ring (3) projects from a ring-side through-hole (305) through which the thumb-turn body (4) can penetrate, and the thumb-turn body (4) connected to the ring-side through-hole (305). A thumb turn, comprising: a passage groove (306) through which a pin (404) can pass; and a ring-side meshing portion (303) meshable with the case-side meshing portion (201). The thumb turn according to claim 1, wherein a decorative ring (5) is detachably attached to an outer periphery of the thumb turn case (2). The thumb turn according to claim 1 or 2, wherein a spring is used as the elastic body (6). 3. The thumb-turn according to claim 1, wherein an E-ring is used as the locking means.

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