JP2012197585A - Thumb turn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a thumb turn which is easy to operate for an elderly and a little child.SOLUTION: A knob 2 is fitted movably and retractably to a barrel 4 having a thumb turn shaft 51 for retracting a lock rod of a lock by a rotating operation and performing locking and unlocking, and the knob 2 is energized in the projecting direction at all times and held in a projected state. When the knob 2 is pushed in against the energizing force, a cam 3 integrally pivoted to the knob 2 is turned and a locking part of the cam 3 is engaged with a locking part of a control member 7, thereby holding the knob 2 in the state of being housed inside the barrel 4. When the knob 2 is pushed in further in the housed state, engagement of the cam 3 and the control member 7 is released, and the knob 2 is projected from the barrel 4 by the energizing force of energizing means and is held in an original projected state again.

Description

  The present invention relates to a thumb turn that can prevent unauthorized unlocking.

  A so-called thumb turn is known as one of the techniques for illegally unlocking the entrance and entrance doors of houses and buildings. In this method, a wire, a tool, or the like is inserted into a gap between the door and the frame or a hole formed in the door, and the thumb-turn knob on the indoor side is turned to perform unauthorized unlocking.

  As a countermeasure against this unauthorized unlocking, the present applicant previously proposed a thumb turn disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2006-257840).

  In this thumb turn, the thumb turn knob is used to rotate the thumb turn shaft, and the lock can be moved in and out of the normal state (operation mode) where the lock can be locked and unlocked. It can be switched to an idle state (security mode) in which the lock cannot be operated without rotating.

  The thumb turn of Patent Document 1 is very excellent as this kind of thumb turn that prevents unauthorized unlocking.

JP 2006-257840 A

  However, although this thumb turn employs a clutch mechanism as a means for switching modes, the clutch mechanism is complicated, requires a large number of parts, takes time to assemble, and becomes expensive as a whole. In addition, switching between modes requires the operation of pushing the movable member while pushing and pulling the two pressing members (buttons) provided on the knob with two fingers, or pulling them out to engage or disengage the clutch. There was also a problem that it was difficult for the elderly and infants to operate.

  Furthermore, whether the thumb turn is in the operation mode or the crime prevention mode must be determined by the change in the position of the movable member and the button provided on the knob, and it is difficult to visually recognize the mode state. there were. In addition, the knob for mode switching protruded from the knob, and there was still much room for improvement, such as poor appearance.

  Therefore, the thumb turn of the present invention has been devised in order to solve the above problems of the thumb turn of Patent Document 1.

  In order to solve the above-mentioned conventional problems, the thumb turn according to claim 1 of the present invention is fitted so that the knob can be protruded and retracted on the body having the thumb turn shaft which is locked and unlocked by rotating and unlocking the lock rod. The knob is always urged in the protruding direction and held in the protruding state, and when the knob is pushed into the body against the urging force, the cam integrally supported by the knob is When the knob is rotated and the locking portion of the cam is engaged with the locking portion of the control member, the knob is held in the state of being housed in the body. The engagement with the member is released, and the knob protrudes from the body by the biasing means and is held in the original protruding state again.

  A thumb turn according to a second aspect of the present invention is the thumb turn according to the first aspect, wherein the knob is a rectangular parallelepiped in cross section.

  A thumb turn according to a third aspect of the present invention is the thumb turn according to the first aspect, wherein the knob is a cylindrical body having a circular cross section.

The thumb turn according to claim 4 of the present invention is characterized in that, in the thumb turn of claim 1, the knob has a substantially cross-shaped or diamond-shaped cross section.

  The thumb turn according to claim 5 of the present invention is the thumb turn according to any one of claims 1 to 4, wherein the urging means of the knob provides a magnet at the tip of the knob, A magnet is provided in a portion of the knob fitting hole facing the magnet of the knob, and the repulsive force of both magnets is used as a biasing means of the knob.

  According to the thumb turn of the present invention, the knob is normally held in the protruding state (operation mode) protruding from the body, and the thumb turn shaft provided integrally with the body is rotated by operating the knob to lock the lock. Can be locked and unlocked. And when you go out, just push the knob against the urging means of the knob and move it, so that the knob is housed in the thumb turn body and can not be operated (security mode) Unauthorized unlocking with a wire or the like can be effectively prevented. Further, when the user is at home, the knob can be moved (returned) to the protruding state (operation mode) by applying a force in a direction in which the knob is further pushed in the housed state (security mode).

  In addition, as described above, the switching operation between the crime prevention mode and the operation mode can be performed simply by pushing the knob, so that it is very easy and the knob is in the crime prevention mode stored in the thumb turn body or the knob protrudes. It is easy to visually recognize whether the operation mode is set.

  In addition, the thumb-turn knob is placed sideways in the locked state of FIG. 1 and is vertically oriented as shown in FIG. 2 in the unlocked state. Whether it is in a state or unlocked can be determined.

  Furthermore, since the structure of the switching means between the crime prevention mode and the operation mode is extremely simple and the number of parts is small, it is possible to provide a thumb turn that is easy to assemble and has a very low manufacturing cost as a whole.

  In addition, the thumb-turn knob has no buttons for mode switching and has an excellent appearance.

It is the front view of the locked state which attached the lock to which the thumb turn 1 which concerns on this invention was applied to the door 20, and was seen from the indoor side. It is an assembly state figure in the state where knob 2 of thumb turn 1 protrudes. FIG. 3 is an assembly state diagram of a state in which a knob 2 of the thumb turn 1 of FIG. It is a perspective view which shows the decomposition | disassembly state of the thumb turn 1 of this invention. It is the perspective view which looked at the control member 7 from the reverse direction of FIG. 3 is an enlarged view of a cam 3. FIG. FIG. 3 is a horizontal sectional view in FIG. 2 showing a state in which the thumb turn 1 protrudes in a locked state. It is sectional drawing in the A-A 'line of FIG. It is a principal part cross-sectional bottom view of FIG. FIG. 10 is a transverse bottom view showing a state where the knob 2 is pushed in from the state of FIG. 9. FIG. 11 is a cross-sectional bottom view showing a state where the force for pushing the knob 2 is released from the state of FIG. 10 and the knob 2 is housed and held in the body 4. FIG. 12 is a transverse bottom view showing a state where the knob 2 is pushed by a distance x in the state of FIG. 11.

Example 1
A first embodiment of the present invention will be described below with reference to FIGS.
FIG. 1 shows a state in which a lock 10 having a thumb turn 1 according to the present invention is attached to a door 20, and this lock 10 is a so-called known push-pull lock. The thumb turn 1 is provided on a seat 15 provided integrally with the handle 14, which has a lock case 12 equipped with a retracting mechanism (not shown) for operating and a handle 14 for operating the latch 13. The lock case 12 and the seat 15 are provided up and down, and thumb turns 1 and 1 are provided in the upper and lower seats 15 and 15, respectively. Although not shown, a similar handle and seat are provided on the outdoor side, and a cylinder is provided on the seat. The lock can be locked and unlocked by operating the thumb turn or the cylinder key.

  2 and 3 are perspective views showing the assembled state of the thumb turn 1. FIG. 2 shows a state in which the knob 2 protrudes from the body 4, and FIG. 3 shows a state in which the knob 2 is pushed into the body 4. FIG. When the knob 2 in FIG. 2 is protruded, the knob 2 can be operated. By operating the knob 2, the thumb turn shaft 51 is rotated and the lock rod 11 of the lock 10 is raised and lowered to lock and unlock. The thumb turn shaft 51 is the same as a conventionally known thumb turn shaft, and the tip portion is formed in a cross shape. The thumb turn shaft 51 can be engaged with the retracting operation mechanism in the lock case 12 in the vertical direction or the horizontal direction.

  In FIG. 1, the thumb 2 of the thumb turn 1 is horizontal, and in FIGS. 2 and 3, the knob 2 is vertical. When the thumb turn 1 is assembled to the lock 10, the knob 2 is locked in the locked state as shown in FIG. 1. What is necessary is just to assemble to become sideways.

  As shown in the exploded perspective view of FIG. 4, the thumb turn 1 includes a body 4 including a rotating body 5 having a thumb turn shaft 51 and a seat 6, a knob 2, and a control member 7. Is fitted in a knob fitting hole 52 formed in the rotating body 5 so as to be movable in the axial direction of the thumb turn shaft 51. The thumb turn shaft 51 is used to lock and unlock the lock rod 11 of the lock 10 by rotating and moving. That is, by rotating the body 4 by operating the knob 2, the thumb turn shaft 51 of the rotating body 5 is rotated and locked and unlocked.

  As shown in FIG. 7, the rotating body 5 and the seat 6 are inserted into a hole 53 formed in the rotating body 5 by inserting a screw column 62 protruding from the seat 6, and the screw 9 is inserted into the screw column 62 from the rear of the rotating body 5. The body 4 is formed by being screwed into and fixed to the screw holes 63. The seat 6 is provided with a knob fitting hole 61 into which the knob 2 is inserted, and a concave portion 64 is formed on the front surface, similarly to the knob fitting hole 52 of the rotating body 5.

  As shown in FIGS. 7 and 9, the knob 2 is constantly urged by a spring 8 in a direction protruding from the body 4, but the step portion 23 of the knob 2 is formed in the flange portion 77 of the control member 7. Abutting on the edge of the tab insertion hole 75, further protrusion is prevented, and the protrusion is held in the protruding state of FIGS. One end of the spring 8 is fitted into a hole 22 formed in the knob 2, and the other end is suspended and held by a pillar 54 protruding from the rotating body 5 as shown in FIG. 9.

  As shown in FIGS. 7 and 8, the knob 2 has a shaft 35 of a cam 3 inserted into a hole 21 formed on one side surface thereof, and the cam 3 is pivotally supported. And are held so as to move together.

  Further, in the body 4 of the thumb turn 1, a control member 7 having a guide portion 71 for guiding a cam 3 that moves integrally with the knob 2 is provided with a rotating body 5 and a seat 6 as shown in FIGS. The flange 77 of the control member 7 is sandwiched between and fixed.

  2, 7 and 9 show a state in which the knob 2 protrudes from the body 4. In this state, the thumb turn 51 can be rotated by operating the knob 2 to be locked and unlocked. In this protruding state (operation mode), the cam 3 is in a horizontal state between the top plate 78 and the bottom plate 79 of the guide groove 74 in the guide groove 74 of the guide portion 71 of the control member 7 as shown in FIG. Is held in. The cam in this state is shown in the enlarged view of FIG.

  FIG. 10 shows a state in which the knob 2 is pushed into the body 4 against the urging force of the spring 8 from the state of FIG. 9. At this time, the cam 3 has the inclined surface portion 31a of the first tip portion 31 as a guide portion. Abutting on a first locking portion 72 provided at the distal end portion of 71, the cam 3 rotates in the clockwise direction, and the state shown in FIG.

Next, when the finger 2 is released in the state of FIG. 10 and the force to push the knob 2 is released, the knob 2 tries to protrude to its original state by its urging force, but as shown in FIG. Is protruded by a distance x, the cam 3 is in a state of rotating clockwise as described above, so that the first rear end portion 33 of the cam 3 is provided with the second locking portion 73 provided in the guide portion 71. Abut. Then, the cam 3 is pushed by the second locking portion 73 of the guide portion 71 by the urging force of the knob 2 in the protruding direction, so that the cam is further rotated in the clockwise direction. At this time, the second rear end portion 34 of the cam 3 abuts against the bottom plate 79 of the guide groove 74, and the cam 3 is prevented from further rotation. Therefore, as shown in FIG. The engaged state in which the rear end portion 34 is engaged with the second locking portion 73 of the guide portion 71 is maintained.
Therefore, further protrusion of the knob 2 is prevented and held in this stored state. That is, this state is a state in which the knob 2 is completely housed in the body 4 and the knob 2 cannot be operated, and cannot be locked or unlocked (security mode).

  Next, when the knob 2 shown in FIG. 11 is housed in the body (security mode), when the knob 2 is pushed against the urging force, the knob 2 moves by a distance x. At this time, as shown in FIG. 12, the second tip portion 32 of the cam 3 abuts on the first locking portion 72 provided on the guide portion 71, and the cam 3 rotates clockwise by the pushing force. The state shown in FIG.

  In the state of FIG. 12, when the finger 2 is released from the knob 2 and the force to push the knob 2 is released, the knob 2 protrudes by the biasing force of the spring 8, and the second rear end 34 of the cam 3 becomes the second of the guide 71. The cam 3 abuts on the locking portion 73 and rotates counterclockwise. At this time, there is nothing that prevents the rotation of the cam 3, so the knob 2 rotates to the original protruding state (operation mode) shown in FIG. 9, and the cam 3 also reaches the horizontal state shown in FIG. It rotates and is housed and held between the top plate 78 and the bottom plate 79 of the guide groove 74.

  When the knob 2 returns from the protruding state shown in FIG. 9 to the original protruding state shown in FIG. 9 through the retracted state shown in FIG. 11, the cam 3 is rotated by 180 °, and the first position located on the left side of the cam 3 in FIG. And the 2nd front-end | tip part is located in the position of the 1st and 2nd rear-end part of the right side. By the way, since the front end portion and the rear end portion of the cam 3 are formed to be 180 ° rotationally symmetric, the first front end portion 31 and the second rear end portion 33, and the second front end portion 32 and the second rear end portion. Each of 34 performs the same function as described above. Accordingly, it is possible to repeatedly operate from the above-described protruding state to the stored state and from the stored state to the protruding state.

(Other examples)
In the configuration of the first embodiment, the knob 2 is a rectangular parallelepiped with a substantially rectangular cross section. However, the knob 2 may be a circular cylinder having a circular cross section. The shape may be any as long as the knob 2 can be rotated in the protruding state, and the shape is not particularly limited.

  Further, as the urging means for urging the knob 2 in the protruding direction, the two coil springs 8 are used in the configuration of the first embodiment, but the springs may be tension springs or two. There may be one. In addition, it is possible to provide an urging means using the repulsive force of the magnet instead of the spring.

In addition, the position of the cam 3 pivotally supported by the knob 2 may be on the side surface of the knob 2 as in the first embodiment, or may be pivotally supported on the upper surface or the lower surface of the knob 2.
The number of cams 3 may be one as in the first embodiment, but a plurality of cams 3 may be provided in order to operate more smoothly.

The illustrated lock 10 is a push-pull lock as an example to which the thumb turn of the present invention is applied, but the thumb turn of the present invention can also be applied to a case lock, a final lock, an electric lock, or the like.
In addition, the locking and unlocking mechanism of the lock is not limited to the mechanism for moving the lock bowl in and out as in this embodiment, but the lock member is operated by operating a regulating member that regulates the lock-up and drop-out operation of the lock bowl by operating the thumb turn and the cylinder. The present invention can also be applied to a lock that is unlocked or locked and unlocked by controlling the rotation of a lever handle, a knob, or the like.
Furthermore, the thumb turn of the present invention can be applied not only to a building lock, but also to a car lock and other closure locks.

1 thumb turn
2 Knob
3 cams
4 Torso
5 Rotating body
51 Thumb turn axis
52 Knob fitting hole
6 seats
7 Control members
71 Guide part
72 First locking part
73 Second locking part
74 Guide groove
8 Spring
9 Screw

Claims (5)

  By rotating, the knob is fitted to the body with the thumb turn shaft that locks and unlocks the lock ridge by moving it in the axial direction of the thumb turn shaft. When the knob is pushed against the biasing force in the protruding state, the cam that is pivotally supported by the knob is engaged with the locking portion of the control member provided in the body. When the knob is further pushed in in the stowed state, the engagement between the cam and the locking portion of the control member is released. A thumb turn is configured so that the knob protrudes from the body by the urging force of the urging means and is held in the original protruding state.   The thumb turn according to claim 1, wherein the knob has a rectangular parallelepiped shape in cross section.   The thumb turn according to claim 1, wherein the knob is a cylindrical body having a circular cross section.   The thumb turn according to claim 1, wherein the knob has a cross-sectional shape or a rhombus shape in cross-section.   A magnet is provided at the tip of the knob, while a magnet is provided at a portion of the fuselage that faces the tip of the knob at the knob fitting hole, and both magnets are provided so that the same poles face each other. The thumb turn according to any one of claims 1 to 4, wherein the thumb turn is provided as a biasing means.

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