JP4181506B2 - Thumb turn and lock - Google Patents

Description

  The present invention relates to a thumb turn and a lock, and more particularly to a lock and a thumb turn in which the rotation of the knob means is prevented when an external force other than the rotation direction of the knob means is applied.

  2. Description of the Related Art Conventionally, locks for locking and unlocking by using a lock bolt by moving a knob means member to enter and exit are adopted for an entrance door or the like. More specifically, the lock is fixed so that the main body portion is embedded in the door and the dead bolt can protrude and retract from the side surface of the door. When the lock is used for locking the door of the front door, a cylinder lock for locking and unlocking the lock is provided on the outdoor side of the door, and a knob means is attached on the indoor side.

  The dead bolt enters and exits from the side surface of the door by rotating the cylinder lock or the knob means. The door frame to which the door is fixed is provided with a storage portion that can store a dead bolt protruding from the side surface of the door. The door is brought into a locked state or an unlocked state by rotating a cylinder lock or a knob means member and allowing a dead bolt to enter and exit the storage portion.

On the other hand, in recent years crimes that penetrated the house by means of a so-called thumb turn, in which a hole is made in the door with a drill, etc. Is rampant and has become a social problem. In order to solve such a problem, for example, as shown in Patent Document 1 below, a measure for preventing unauthorized unlocking by means of a so-called thumb turn is proposed by providing a thumb turn cover at a position surrounding the knob means of the door. .
JP 2003-056218 A

Further, as a measure for preventing unauthorized unlocking due to the thumb turn described above, there is a lock provided with a knob means as shown in Patent Document 2 below. The knob means material disclosed in Patent Document 2 is detachable from the knob means, and prevents unauthorized unlocking by removing the knob means.
Japanese Patent Laid-Open No. 11-200678

  As disclosed in the above-mentioned Patent Document 1, if a thumb turn cover is provided around the picking means material, even if a tool is inserted by opening a hole in the door, the tool hardly reaches the picking means material. Therefore, if the knob means material is protected by a thumb turn cover as disclosed in Patent Document 1, unauthorized unlocking of the door can be prevented.

  However, when the thumb turn cover is provided as described above, it is necessary to open the thumb turn cover lid each time the knob means member is rotated. Moreover, when it is set as the structure which provides a thumb turn cover, when it forgets to close a cover body, it has the problem that the crime prevention effect with respect to thumb turn will be reduced by half. Further, even when the picking means portion of the picking means material is detachable as in Patent Document 2, if the forgetting to pick out the picking means portion, there is a problem that the effect against illegal unlocking by the thumb turn cannot be exhibited at all. is there.

  Therefore, the present invention has an object to provide a thumb turn and a lock that can prevent the turning operation of the knob means from the outside, have excellent crime prevention characteristics, and have excellent operability.

Therefore, the invention according to claim 1 provided to solve the above-described problem has a rotating shaft and a knob means for operating the rotating shaft, and the knob means is provided on the rotating shaft. An operation unit is rotatably supported around an axis, and the operation unit is mounted and picked so that a gap is formed between the operation shaft and the rotation shaft. It is deformed by receiving a pressing force in a direction close to the axis of the rotating shaft, and a part or all of them are in direct or indirect contact with the rotating shaft, and torque is applied to the rotating shaft It is a thumb turn that can be transmitted to the side.

  The thumb turn according to the present invention is so-called because torque can be transmitted to the rotating shaft by applying a pressing force to the operating portion of the knob means in a direction close to the axis of the rotating shaft. Torque is not transmitted to the rotating shaft just by trying to push the knob using some jig or tool like a thumb turn.

  On the other hand, the thumb turn of the present invention can transmit torque to the rotary shaft by picking the knob and rotating it while pressing the operating portion in the same manner as the thumb turn generally used conventionally. Therefore, according to the present invention, it is possible to provide a thumb turn excellent in crime prevention performance against unauthorized unlocking such as thumb turn while maintaining the same operability as before.

  The invention according to claim 2 has a torque transmission part that cannot rotate relative to the rotation shaft, and the operation part is arranged on the outer peripheral side of the torque transmission part and receives torque to transmit torque. The thumb turn according to claim 1, wherein the thumb turn contacts the portion.

  In the thumb turn of the present invention, the operation unit and the torque transmission unit come into contact with each other when the operation unit is picked and pressed. Therefore, the thumb turn of the present invention can transmit the torque to the rotating shaft by a very general operation of picking and turning the operation portion of the picking means.

  On the other hand, in the thumb turn of the present invention, unless the operation part is pressed, the operation part and the torque transmission part do not contact each other, and torque is not transmitted to the rotating shaft. For this reason, in the thumb turn of the present invention, the rotating shaft does not rotate even if an illegal operation such as hooking and turning a tool or jig on a picking means called thumb turn is attempted. Therefore, according to the present invention, the rotation shaft can be rotated without performing a special operation, and a thumb turn in which the rotation shaft does not rotate even if an illegal operation such as a thumb turn is performed can be provided.

  A third aspect of the present invention is the thumb turn according to the first or second aspect, wherein the operation portion has flexibility in a direction approaching the axis of the rotation shaft.

  According to this configuration, the operating unit is brought into direct or indirect contact with the rotating shaft without transmitting a large external force to the operating unit, and torque acting on the operating unit is transmitted to the rotating shaft. be able to. Therefore, according to the present invention, it is possible to provide a thumb turn excellent in crime prevention performance against illegal unlocking represented by thumb turn without impairing operability.

  The invention according to claim 4 is the thumb turn according to any one of claims 1 to 3, wherein a circumscribed circle of the operation portion is larger in diameter than an outer diameter of the rotating shaft.

  In the thumb turn of the present invention, since the circumscribed circle of the operation portion is larger than the outer diameter of the rotation shaft, a large torque is generated on the rotation shaft only by gripping the operation portion and applying a small force. Therefore, according to the present invention, it is possible to provide a thumb turn that is excellent in operability in addition to the crime prevention characteristics.

  According to a fifth aspect of the present invention, there is provided a thumb turn according to any one of the first to fourth aspects, wherein a friction member having a larger coefficient of friction than the operation portion is interposed on the inner peripheral surface side of the operation portion. is there.

  In the thumb turn according to the present invention, since the friction member having a large friction coefficient is interposed on the inner peripheral surface side of the operation portion, the operation portion rotates even if the operation portion is pressed and rotated around the axis of the rotation shaft. Almost no slip with respect to the moving axis. Therefore, according to the above-described configuration, the torque acting on the operation unit can be reliably transmitted to the rotation shaft.

  A sixth aspect of the present invention is the thumb turn according to any one of the first to fifth aspects, wherein the knob means has an idling portion that idles with respect to the rotating shaft.

  The thumb turn according to the present invention is configured such that even if an external force in the tangential direction of the rotary shaft acts on the knob member in order to perform an illegal operation such as a thumb turn, the rotary portion only rotates idle. Torque is not transmitted to. Therefore, according to the present invention, it is possible to provide a thumb turn in which the rotation shaft cannot be rotated only by applying an external force in the tangential direction of the rotation shaft.

  A seventh aspect of the present invention is the thumb turn according to any one of the first to sixth aspects, wherein the outer peripheral surface of the knob means has a substantially circular cross-sectional shape.

  The thumb turn of the present invention has a substantially circular cross-sectional shape on the outer peripheral surface of the picking means. External force cannot be effectively applied to Therefore, according to the present invention, it is possible to provide a thumb turn that can reliably prevent an illegal operation such as turning the thumb turn.

  The invention according to claim 8 is a lock characterized in that the thumb turn according to any one of claims 1 to 7 is connected to the lock before the locking piece is advanced and retracted from the lock body.

  According to this configuration, it is possible to provide a lock that can reliably prevent unauthorized unlocking such as thumb turn without impairing the operability of normal locking and unlocking operations.

  According to the present invention, it is possible to provide a thumb turn and a lock which are not capable of unauthorized operation and unauthorized unlocking and have excellent crime prevention characteristics and operational characteristics.

  Next, the lock and thumb turn according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing an installed state of a lock and a thumb turn according to the present embodiment. 2 (a) is a perspective view showing a state in which the thumb turn employed in the lock shown in FIG. 1 is observed from the front side, and FIG. 2 (b) shows the thumb turn shown in FIG. 1 (a) from the back side. It is a perspective view which shows the state observed. 3 is an exploded perspective view of the thumb turn shown in FIG. FIG. 4A is a conceptual diagram showing a state of the transmission mechanism part before pressing the operation part of the thumb turn shown in FIG. 3, and FIG. 4B shows a state of the transmission mechanism part when the operation part is pressed. FIG. FIGS. 5A to 5F are conceptual diagrams showing modifications of the thumb-turn transmission mechanism shown in FIG. FIG. 6A is a perspective view showing a modification of the thumb turn shown in FIG. 2, and FIG. 6B is a perspective view showing a state in which the thumb turn shaft and the operation part constituting the thumb turn of FIG. It is.

  In FIG. 1, 1 is a lock of this embodiment. The lock 1 is configured such that a cylinder lock 5 is connected from one side of the door 2 to a lock body 3 embedded in the door 2, and a thumb turn 6 is connected from the other side. The lock body 3 has a structure in which an operating mechanism for moving the dead bolt 8 and the latch 10 back and forth is built in the main body case 7 in the same manner as a conventionally known lock. The dead bolt 8 protrudes or retracts from the side surface of the door 2 when the cylinder lock 5 and the thumb turn 6 connected to the lock body 3 are operated. Similarly, the latch 10 can be protruded or retracted from the side surface of the door 2 by operating the handle 12 connected to the operation mechanism in the lock body 3 via the square core 11.

  The thumb turn 6 is fitted into a cylindrical base 13 attached to the door 2 and used in a screwed state. As shown in FIGS. 2 and 3, the thumb turn 6 has a knob 24 (pick means) having a transmission mechanism 23 sandwiched between the support members 21 and 22 around the axis of the thumb turn shaft 20 (rotating shaft). It has a configuration attached to. The knob 24 has a substantially spherical shape by the support members 21 and 22 and the transmission mechanism 23. Therefore, the knob 24 has a substantially circular outer shape in cross section substantially perpendicular to the axial direction of the thumb turn shaft 20.

  As shown in FIG. 3, the thumb-turn shaft 20 is roughly divided into three regions consisting of a head portion 25, an intermediate portion 26, and a tip portion 27. The thumb-turn shaft 20 is gradually reduced in a step shape from the head 25 side toward the tip portion 27 side. It is a shaft body to be diameter. The head 25 is a portion facing the operator side when the thumb turn shaft 20 is mounted on the lock body 3 and is formed in a step shape. More specifically, the head portion 25 is a stepped portion in which a large-diameter portion 25a and a small-diameter portion 25b having a substantially circular cross-sectional shape and an engaging portion 28 having a substantially square cross-sectional shape are continuously formed. is there. The large diameter portion 25a has an exposed surface 25c exposed to the operator side in the lock 1. As shown in FIG. 2A, the exposed surface 25c is provided with a display 25d indicating the posture of the thumb turn shaft 20, that is, the locked state of the lock 1.

  The intermediate part 26 is a cylindrical part and has a smaller cross-sectional area than the head part 25. On the distal end 27 side of the intermediate portion 26, a groove 30 for mounting a C ring 50 described later is provided over the entire circumference. Moreover, the front-end | tip part 27 is a substantially cylindrical part further diameter-reduced rather than the intermediate part 26, and the four recessed parts 31 are provided in the circumferential direction at the front-end | tip side. The concave portion 31 is a portion that engages with an operating mechanism in the main body case 7 when the thumb turn shaft 20 is connected to the lock main body 3.

  The support member 21 is a resin-made member having a truncated cone shape, and has a shape in which the diameter is increased from the small diameter portion 21a on one end side in the axial direction toward the large diameter portion 21b side on the other end side. A through hole 32 is formed at the center of the support member 21. The through hole 32 is formed in a shape along the large diameter portion 25a and the small diameter portion 25b that form the head portion 25 of the thumb turn shaft 20. The support member 21 is rotatably supported with respect to the thumb-turn shaft 20 by inserting the thumb-turn shaft 20 into the through hole 32 from the distal end portion 27 side.

  The transmission mechanism unit 23 includes a disk unit 33 (torque transmission member) and an operation unit 35. The disk portion 33 is a resin member whose outer shape is substantially disk-shaped, and a square engagement hole 36 having a shape along the engagement portion 28 of the thumb turn shaft 20 is provided at the center thereof. Therefore, when the thumb turn shaft 20 is inserted into the engagement hole 36 of the disk portion 33 with the support member 21 mounted on the thumb turn shaft 20 in advance, and the engagement hole 36 and the engagement portion 28 of the thumb turn shaft 20 are engaged. The disk portion 33 can be made in a state in which it cannot rotate with respect to the thumb turn shaft 20, and the support member 21 can be made in a state in which it cannot move in the axial direction of the thumb turn shaft 20.

  A groove 37 is provided on the entire outer periphery of the disk portion 33, and a rubber O-ring 38 (friction member) is attached to the groove 37. The friction member 38 has a larger coefficient of friction than the disk portion 33 and the operation portion 35 described later. Therefore, even if an external force is applied in the circumferential direction of the disk part 33, the transmission mechanism part 23 does not slip with respect to the disk part 33 or the operation part 35, and the torque transmission efficiency between the operation part 35 and the disk part 33 is high. high.

  The operation unit 35 is made of resin and is a ring-shaped member having a size that can surround the outer periphery of the disk unit 33. The operation unit 35 has a thickness d substantially equal to that of the disk unit 33. The operation unit 35 has an inner diameter slightly larger than the outer shape of the O-ring 38 attached to the outer peripheral portion of the disk portion 33 and is mounted so as to surround the disk portion 33. Therefore, as shown in FIG. 4A, a slight gap 39 is always formed between the operation unit 35 and the O-ring 38.

  The outer diameter of the operation portion 35 is substantially the same as the outer diameter of the large-diameter portion 21b of the support member 21 and the large-diameter portion 22a of the support member 22 described later. Therefore, when the operation part 35 is arranged at a position adjacent to the large diameter part 21b side of the support member 21 as shown in FIG. 2, the operation part 35 is sandwiched between the large diameter parts 21b and 22a of the support members 21 and 22. The movement of the thumb turn shaft 20 in the axial direction is restricted, and the thumb turn 6 does not fall off the thumb turn 6.

  The operation portion 35 is thin and has flexibility in a direction toward and away from the disc portion 33 and the thumb turn shaft 20 penetrating substantially the center thereof. For this reason, when the operation portion 35 is pressed toward the center in the radial direction by picking the outer peripheral surface 35 a with a finger or the like, the operation portion 35 is deformed into a substantially elliptical shape, and the inner peripheral surface 35 b comes into surface contact with the O-ring 38 of the disk portion 33. Accordingly, the operating portion 35 rotates idly with respect to the disc portion 33 only by applying an external force in the tangential direction of the outer peripheral surface 35a. However, if the outer peripheral surface 35a is bent and bent, the gap 39 of the part disappears. The inner peripheral surface 35b and the O-ring 38 of the disk portion 33 are in surface contact with each other, and the torque can be transmitted to the disk portion 33 side. That is, the operation unit 35 is in a contact state indirectly through the disk portion 33 by being pressed in the axial direction of the thumb turn shaft 20 and is in a state where torque can be transmitted.

  The support member 22 is a resin member, and is a substantially truncated cone-shaped member that decreases in diameter from the large-diameter portion 22a side on the one axial end side toward the small-diameter portion 22b side. A through hole 40 having a size corresponding to the outer diameter of the intermediate portion 26 of the thumb-turn shaft 20 is formed at a substantially central portion of the support member 22. The support member 22 is rotatably supported with respect to the thumb turn shaft 20 with the thumb turn shaft 20 inserted through the through hole 40 with the large-diameter portion 22a facing the support member 21 side. The outer diameter of the large-diameter portion 22a of the support member 22 is substantially the same as the outer diameter of the operation portion 35 of the transmission mechanism portion 23 described above. Therefore, when the thumb turn 6 is assembled as shown in FIGS. 2 and 3, the large-diameter portion 22 a of the support member 22 comes into surface contact with the disk portion 33 of the transmission mechanism portion 23, and the operation portion 35 is larger than the support member 22. It will be in the state contact | abutted to the diameter part 22a.

  A cover member 41 that fits into the cylindrical pedestal 13 is provided at a position adjacent to the support member 22. The cover member 41 is formed by molding a metal plate, and includes a disk-shaped covering portion 43 and a peripheral wall portion 45 that surrounds the outer peripheral portion and extends toward the inner surface 43 a side of the covering portion 43. The cover member 41 is provided with an insertion hole 46 through which the intermediate portion 26 of the thumb turn shaft 20 can be inserted at a substantially central portion of the covering portion 43. Around the insertion hole 46, there is a cylindrical peripheral wall portion 47 that protrudes toward the inner surface 43 a and supports the thumb turn shaft 20 in the same manner as the peripheral wall portion 45. A screw hole 48 through which a screw for fixing the thumb turn 6 to the pedestal 13 and the door 2 can be inserted on the covering portion 43 at a position outside the insertion hole 46.

  When the support members 21 and 22, the transmission mechanism portion 23, and the cover member 41 are sequentially attached to the thumb turn shaft 20, the knob 24 is exposed to the outer surface 43 b side of the covering portion 43 as shown in FIG. As shown in FIG. 2B, a groove 30 formed in the intermediate portion 26 of the thumb turn shaft 20 appears at a position corresponding to the end portion of the peripheral wall portion 47 of the cover member 41. The length from the exposed surface 25c of the head 25 of the thumb turn shaft 20 to the groove 30 is such that the support members 21 and 22, the transmission mechanism portion 23 and the cover member 41 are in close contact with each other as shown in FIGS. When arranged in this state, the length is substantially the same as the length from the end of the support member 21 to the end of the peripheral wall 47 that protrudes toward the inner surface 43 a of the cover 43 of the cover member 41. Therefore, when the C-ring 50 is mounted in the groove 30 in the above-described state, the support members 21, 22, the transmission mechanism unit 23, and the cover member 41 are in surface contact with each other and are not movable in the axial direction of the thumb-turn shaft 20. .

  Next, the operation of the lock 1 and the thumb turn 6 attached to the lock 1 will be described in detail with reference to the drawings. The lock 1 inserts a key (not shown) suitable for the cylinder lock 5 attached to the door 2 and performs a turning operation, or turns the thumb turn 6 to move the dead bolt 8 from the side of the door 2. It can be taken in and out and locked or unlocked.

  When the thumb turn 6 is attached to the door 2, the portions other than the large diameter portion 25 a of the head portion 25 of the thumb turn shaft 20 are covered with the support members 21 and 22 and the transmission mechanism portion 23 and are not exposed to the outside. Therefore, the thumb turn 6 cannot directly rotate the thumb turn shaft 20. Further, since the support members 21 and 22 are rotatable with respect to the thumb turn shaft 20, the thumb turn shaft 20 does not rotate even if these portions are picked and rotated.

  As for the transmission mechanism part 23 pinched | interposed between the support members 21 and 22, the disk part 33 in the axial center side of the thumb turn axis | shaft 20 and the ring-shaped operation part 35 in the outer peripheral part are independent. A gap 39 is normally formed between the disk part 33 and the operation part 35, and the operation part 35 is freely rotatable with respect to the disk part 33 at all times. . Therefore, even when trying to apply a method such as turning the thumb turn using a jig or the like, the operating portion 35 simply turns around the disk portion 33 and torque is not transmitted to the thumb turn shaft 20.

  As described above, the operation unit 35 has flexibility. Therefore, when the knob 24 is picked as shown by an arrow P in FIG. 4A and the operating portion 35 is pressed, the operating portion 35 is bent, and the disk portion on the axial center side of the thumb turn shaft 20 as shown in FIG. It makes surface contact with the O-ring 38 attached to 33. In this state, when an external force is applied in the circumferential direction of the thumb turn shaft 20 as indicated by an arrow R in FIG. 4B, torque is transmitted to the disk portion 33. The disk portion 33 is fixed with respect to the thumb turn shaft 20 and is in a state in which relative rotation is impossible. Therefore, when the thumb turn 6 is picked and turned, the torque is transmitted to the thumb turn shaft 20 side, and the operating mechanism in the lock body 3 can be operated.

  As described above, the lock 1 of the present embodiment cannot be locked or unlocked without transmitting torque unless the operating portion 35 of the thumb turn 6 is picked and turned. In addition, since the thumb turn 6 has a substantially circular outer shape of the knob 24, there is no portion where the jig is caught even if the thumb turn 6 is applied by some kind of jig like a so-called thumb turn. Further, since the support members 21 and 22 are rotatably supported with respect to the thumb turn shaft 20, no torque is transmitted to the thumb turn shaft 20 even if a tool or the like is caught on the part. Therefore, the lock 1 cannot be unlocked by a method such as a so-called thumb turn, and has excellent crime prevention characteristics.

  Further, since the lock 1 and the thumb turn 6 can be locked and unlocked by the same operation as the lock and thumb turn of the prior art of picking and turning the knob 24, it is possible to take a security measure against turning the thumb turn without deteriorating the operation characteristics.

  The lock 1 has a structure for transmitting torque to an operating mechanism in the lock body 3 via a disk portion 33 that is fixed so as not to rotate relative to the thumb turn shaft 20. Here, since the outer diameters of the disk part 33 and the operation part 35 are larger than the outer diameter of the intermediate part 26 of the thumb turn shaft 20, a large torque can be transmitted to the operating mechanism side without applying a large rotational force. Therefore, the lock 1 provided with the thumb turn 6 can easily perform the locking operation and the unlocking operation.

  In the above embodiment, even if the bending force of the operation portion 35 is not so great because the force to pick the knob 24 is small, the torque of the disc portion 33 is surely transmitted to the disc portion 33 and the thumb turn shaft 20 side. An O-ring 38 is arranged around the periphery to prevent the disk portion 33 from spinning around the operation portion 35. However, the present invention is not limited to this. For example, the O-ring 38 is not provided, or the disk portion 33, the O-ring 38, and the operation portion 35 are provided as shown in FIGS. The shape may be changed as appropriate.

  More specifically, in place of the transmission mechanism 23 described above, an operation portion 61 having a polygonal cross section (octagon in this embodiment) is arranged on the outer periphery of the disc portion 33 as shown in FIG. As shown in FIG. 5B, either the outer peripheral surface 62 or the inner peripheral surface 63 (the outer peripheral surface 62 in this embodiment) is circular, and the other (the inner peripheral surface 63 in this embodiment). ) May employ a transmission mechanism 66 provided with an operation unit 65 having a polygonal shape. Further, as shown in FIG. 5C, in place of the disk portion 33 described above, a transmission mechanism portion 68 employing a disk portion 67 (torque transmission member) whose outer peripheral portion is chamfered in a polygonal shape, or FIG. A combination of the disk part 67 and the operation part 65, such as the transmission mechanism part 70), can be used as a substitute for the transmission mechanism part 23. Further, instead of chamfering like the disk part 67, a polygonal cross-sectional shape may be adopted for the O-ring 38 attached to the outer peripheral part of the disk part 33.

  Furthermore, the transmission mechanism section 23 described above includes a transmission mechanism section 75 in which an operation section 73 having a plurality of tooth sections 72 on the inner peripheral side is arranged on the outer peripheral section of the disk section 33, as shown in FIG. As shown in FIG. 5 (f), a transmission mechanism 78 and the like configured by the operation portion 73 and a disk portion 77 (torque transmission member) provided with a tooth portion 76 that meshes with the tooth portion 72 of the operation portion 73 on the outer periphery. It is also possible to adopt. Even if the transmission mechanism portions 60, 66, 68, 70, 75, 78 and the like having such a configuration are adopted, the thumb turn shaft is used unless the operation portions 35, 61, 65, 73, etc. are pressed and rotated in the same manner as the transmission mechanism portion 23. It is possible to provide the lock 1 and the thumb turn 6 having excellent crime prevention characteristics in which no torque is transmitted to the 20 side.

  In the lock 1 of the above embodiment, the transmission mechanism portion 23 is manufactured separately from the thumb turn shaft 20, but the present invention is not limited to this, for example, a thumb turn 80 shown in FIG. A thumb turn shaft 83 (rotating shaft) provided with a torque transmission portion 82 having a smaller outer diameter than that at a position adjacent to the head 81 is prepared, and the operation portion 35 described above is mounted on the torque transmission portion 82 It is good. At this time, it is desirable that an O-ring 38 or the like is mounted around the operation unit 35 and the torque transmission unit 82 as shown in FIG. Even with such a configuration, normal unlocking and locking operations can be performed smoothly, and unauthorized operations such as thumb turn can be prevented.

It is a perspective view which shows the installation state of the lock which is one Embodiment of this invention, and a thumb turn. (A) is a perspective view which shows the state which observed the thumb turn employ | adopted before the lock shown in FIG. 1 from the front side, (b) is the state which observed the thumb turn shown to the same (a) from the back side. It is a perspective view shown. FIG. 3 is an exploded perspective view of the thumb turn shown in FIG. 2. (A) is a conceptual diagram which shows the state of the transmission mechanism part before pressing the operation part of the thumb turn shown in FIG. 3, (b) is the concept which shows the state of the transmission mechanism part at the time of pressing an operation part. FIG. It is a conceptual diagram which shows the modification of the transmission mechanism part of the thumb turn shown in FIG. (A) is a perspective view which shows the modification of the thumb turn shown in FIG. 2, (b) is a perspective view which shows the state which decomposed | disassembled the thumb turn axis | shaft and operation part which comprise the thumb turn of (a). .

Explanation of symbols

1 Lock 6,80 Thumb turn 20, 83 Thumb turn shaft (rotating shaft)
21, 22 Support member 23, 60, 66, 68, 70, 75, 78 Transmission mechanism 24 Pick (pick means)
33, 67, 77 Disk part (torque transmission member)
35, 61, 65, 73 Operating section 38 O-ring (friction member)
39 Clearance

Claims (8)

A pivot shaft and a knob for operating the pivot shaft;
The knob means has an operation portion that is rotatably supported around the axis of the rotation shaft,
The operation unit is mounted so that a gap is formed between the operation shaft and the rotation shaft so that the operation portion is idle . A thumb turn which is deformed by receiving a pressing force , part or all of which is in direct or indirect contact with the rotating shaft, and capable of transmitting torque to the rotating shaft side. It has a torque transmission part that cannot rotate relative to the rotation axis,
The thumb turn according to claim 1, wherein the operating portion is disposed on an outer peripheral side of the torque transmitting portion, and contacts the torque transmitting portion by receiving a pressing force.   The thumb turn according to claim 1 or 2, wherein the operation part has flexibility in a direction close to the axis of the rotation shaft.   The thumb turn according to any one of claims 1 to 3, wherein a circumscribed circle of the operation portion has a larger diameter than an outer diameter of the rotating shaft.   The thumb turn according to any one of claims 1 to 4, wherein a friction member having a friction coefficient larger than that of the operation portion is interposed on the inner peripheral surface side of the operation portion.   The thumb-turn according to any one of claims 1 to 5, wherein the knob means has an idling part that idly rotates with respect to the rotating shaft.   7. The thumb turn according to claim 1, wherein the knob means has a substantially circular cross-sectional shape on the outer peripheral surface.   The lock according to any one of claims 1 to 7, wherein the thumb turn is connected to the lock for moving the lock piece forward and backward from the lock body.

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