JP2004132012A - Thumb-turn lock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a malfeasant unlocking operation that burglarproofness is deteriorated, a thumb-turn is operated by inserting a tool, a hand or the like and a thumb-turn lock is unlocked easily regarding the thumb-turn lock mainly used as a door lock. <P>SOLUTION: In the thumb-turn lock, by which a dead bolt is projected or retracted to or from an end face on the door side by operating the thumb-turn on the indoor side and which is used for locking/an unlocking, the thumb-turn lock 1 in which a cylindrical indicator 10 rotatable in the periphery of the axial center of the thumb-turn lock is installed between the inner-peripheral wall surface of the cylindrical thumb-turn and the outer-peripheral wall surface of an external cylinder for a cylinder lock and the front end face of the indicator is exposed to the outside while a display means 10a capable of visually recognizing the rotation of the indicator is mounted to a part of the front end face is provided. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to, for example, a thumb lock which is mainly used as a door lock, and more specifically, an unauthorized unlocking method in which a window glass near a door is broken, a tool or a hand is inserted to operate the thumb turn, and the door is easily unlocked. The present invention relates to a thumb turn lock for preventing an unlocking operation.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been known a thumb-turn lock that locks and unlocks a deadbolt from a door-side end face only by rotating, for example, a lever-type thumbturn from an indoor side.
[0003]
Since the unlocking can be easily performed by the thumb turn, if there is a window glass on the door or there is a window glass near the door, there is a possibility that the hand may be broken through the window glass, the hand may be inserted, and the thumb turn may be operated to enter from outside. There is. Therefore, in order to enhance the security of the Samturn lock, there has been proposed a lock equipped with a lock separate from the thumbturn so that the locked dead bolt cannot be unlocked (for example, see Patent Document 1).
[0004]
[Patent Document 1]
JP 2001-193326 A (Pages 1 to 4, FIGS. 1 and 5)
[0005]
[Problems to be solved by the invention]
In such a case, if a lock for fixing the deadbolt is provided separately from the thumb turn, the lock box becomes large and the number of parts increases, so that it is proposed to improve the security by setting the thumb turn to idle.
[0006]
However, as shown in FIG. 12, if the outer diameter of the thumb turn 21 of the thumb turn lock 20 is circular, it cannot be immediately visually determined whether the dead bolt 8 is in the locked state or the unlocked state. It is inconvenient. Therefore, an indicator 22 is required to indicate which state is locked or unlocked. However, in the case of an emergency, the indicator must be a display means that can be immediately visually recognized. In providing the indicator 22, it is necessary to minimize an increase in the number of parts. The thumb-turn tablet according to the present invention has been proposed to solve such a problem.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the gist of the thumb-turn lock according to the present invention is a thumb-turn lock for operating a thumb-turn inside and out of a door to cause a deadbolt to protrude and retract from a door-side end face to lock and unlock the cylinder. Between the inner peripheral wall surface of the thumb turn and the outer peripheral wall surface of the outer cylinder of the cylinder lock, a cylindrical indicator rotatable around the axis of the thumb lock is provided, and the front end surface of the indicator is exposed to the outside. In addition, a display means is provided on a part of the front end face so that the rotation of the indicator can be visually recognized.
[0008]
In addition, the display means is a notch arranged at least one in the circumferential direction;
Further, the indicator is provided between the outer peripheral wall surface of the outer cylinder and the inner peripheral wall surface of the indicator, and is provided on the inner peripheral wall surface of the indicator, and a clutch ball which is rotated in a circumferential direction by a thumb-turn clutch. The rotation of the clutch ball in the circumferential direction is performed by the recess fitted to a part of the clutch ball.
[0009]
According to the thumb turn lock of the present invention, since the indicator is a relatively large indicator disposed between the thumb turn and the outer cylinder of the cylinder lock, it is possible to easily recognize the locking / unlocking state of the deadbolt. it can. Since the display means of the indicator is a notch, it is easy to recognize with the naked eye. Further, since the indicator has an irreversible structure that employs a clutch ball and is rotated only by the thumb-turn clutch and cannot rotate the indicator from the outside, it is excellent in security.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, the thumb turn lock 1 according to the present invention will be described with reference to the drawings. As shown in FIG. 1 and FIG. 2, the structure of the thumb turn lock 1 includes an inner cylinder 2 that rotates about an axis a of the thumb turn lock 1 and an outer cylinder 2 that encloses the inner cylinder 2 in a cylindrical space. A cylinder lock 4 composed of a cylinder 3; a thumb turn 5 rotatably mounted on the front side of the cylinder lock 4; a rear part of the cylinder lock 4 accommodated to support the outer cylinder 3; A housing for accommodating mode changing means for changing the mode of whether or not the mode change means is engaged with a part of the mode changing means and rotatably supported by the housing 7 to engage with a driving member of the dead bolt 8 It is generally constituted by a driver 9 and an indicator 10 provided inside the thumb turn 5. The decorative ring 21 is for closing a mounting hole when the decorative ring 21 is mounted on the door A (see FIG. 10).
[0011]
First, the cylinder lock 4, the thumb turn clutch 6, and the like, which are mechanisms for rotating the indicator 10, will be described. As shown in FIG. 3, the cylinder lock 4 is a known one using a tumbler pin 2a. For example, the cylinder lock 4 is inserted into the key groove 12a (FIG. (B)), rotated about 90 degrees (FIG. (C)), and withdrawn at that position (FIG. (D)). ))
[0012]
At the rear end of the inner cylinder 2, there is provided a pin 2b whose tip projects from the outer peripheral surface of the inner cylinder in the radial direction. The pin 2b is rotated in the same direction as the rotation of the inner cylinder 2.
[0013]
The pin 2b is a driving pin provided for moving the thumb turn clutch 6 in the front-rear direction. The relationship between the pin 2b and the thumb turn clutch 6 will be described with reference to FIGS. As shown in FIG. 4, the thumb turn clutch 6 includes a cam member 6a and a clutch body 6b.
[0014]
As shown in FIG. 5 (A), the cam member 6a includes a disc-shaped main body 6c, an uphill 6d that is circumferentially inclined at the front end face of the main body 6c, and a flat portion 6e connected to the uphill 6d. The arc-shaped protrusion 6f is provided symmetrically with respect to the axis a. Guide protrusions 6g are provided on the outer periphery of the protrusion 6f so as to protrude in the front-rear direction. Further, a stopper 6h for the pin 2b is provided at a peripheral end of the protrusion 6f.
[0015]
As shown in FIGS. 5B and 5C, the guide protrusion 6g is fitted into a guide groove 7a provided on the inner peripheral wall surface of the housing 7 so that the cam member 6a moves in the front-rear direction. And does not rotate around the axis a.
[0016]
As shown in FIGS. 4A and 4B, the clutch body 6b has a cylindrical portion 6i having a cross-shaped fitting groove 6h corresponding to the fitting groove 6g, and is formed integrally with the cylindrical portion 6i. A disk-shaped base 6j is formed, and two clutch plates 6k are symmetrically arranged so as to protrude forward from the outer peripheral surface of the base 6j. An engagement projection 6m is provided on the clutch plate 6k so as to protrude forward, and a U-shaped groove 6n is further provided forward.
[0017]
A driver 9 (see FIG. 6) rotatably supported by the housing 7 and having a cross-shaped engaging portion 9a fits into the fitting groove 6h. Then, the thumb turn clutch 6 slides in the front-rear direction with respect to the driver 9 along the direction of the axis a. As shown in FIG. 6, the driver 9 has the engaging portion 9a, a circular rotating portion 9b, and a cross-shaped drive portion 9c which engages with a dead bolt driving member (not shown). It is formed.
[0018]
As shown in FIG. 2, the thumb turn clutch 6 fitted to the engaging portion 9a of the driver 9 is urged to always move forward by a clutch spring 11 which takes a reaction force on the inner wall of the housing 7. .
[0019]
7A, when the pin 2b is in contact with the front surface of the main body 6c of the cam member 6a, the engagement of the thumb turn clutch 6 is established. The projection 6m is urged by the clutch spring 11 to move forward, and is fitted into the engagement recess 5a at the rear end of the thumb turn 5.
[0020]
In this state, when the thumb turn 5 is rotated around the axis a, the thumb turn clutch 6 and the driver 9 are rotated together, and the dead bolt 8 is moved in and out of the side end surface of the door A via these. Therefore, locking and unlocking becomes possible. The engagement recess 5a and the engagement protrusion 6m may not face each other depending on the position of the thumb turn 5 in the circumferential direction. In this case, however, the thumb turn 5 is rotated to be fitted. .
[0021]
When the cam member 6a is moved rearward by the pin 2b, as shown in FIG. 7B, the thumb turn clutch 6b is moved rearward, and the engagement protrusion 6m is moved from the engagement recess 5a. Separate. Accordingly, the engagement relationship between the thumb turn 5 and the thumb turn clutch 6b is released, and the thumb turn 5 freely rotates around the axis a.
[0022]
As described above, the mode changing means for determining whether or not to idle the thumb turn 5 includes the cylinder lock 4, the pin 2b rotated by the cylinder lock 4, and the rotation of the pin 2b in the direction of the axis a of the thumb turn lock 1. And a thumb turn clutch 6 that is moved back and forth.
[0023]
As shown in FIGS. 1 and 2, a relatively large ring-shaped indicator 10 is housed between the thumb turn 5 and the outer cylinder 3 of the cylinder lock 4. As shown in FIGS. 8A and 8B, the indicator 10 has two concave notches 10a at symmetrical positions on its front end face. The notch 10a serves as display means for visually informing the resident of the locked / unlocked state of the deadbolt 8 in an easily visible manner.
[0024]
When the indicator 10 is rotated around the axis a of the thumb turn 5, for example, as shown in FIG. 1B, the state in which the two notches 10 a are in the vertical direction is the unlocked state of the dead bolt 8. When the two notches 10a are in the left-right direction, the locked state of the dead bolt 8 is indicated.
[0025]
A mechanism in which the indicator 10 is rotated by the thumb turn 5 will be described. As shown in FIG. 8C, a hemispherical concave portion 10b is provided symmetrically on the rear end face side of the indicator 10. The recess 10b is a recess for rotating the indicator 10 by the clutch ball 12.
[0026]
As shown in FIGS. 4B and 7, in the thumb turn clutch 6, a U-shaped groove 6 n provided in a portion where both clutch plates 6 k are extended in the front direction is provided with the outer cylinder 3. Two clutch balls 12 are arranged symmetrically between a hemispherical concave portion 3a provided on the outer peripheral surface (see FIGS. 2B to 2E) and a concave portion 10b of the indicator 10. .
[0027]
The operation of the clutch ball 12 will be described. As shown in FIG. 9A, the concave portion 3a of the outer cylinder 3 and the concave portion 10b of the indicator 10 face each other, and between them, the clutch ball 12 is housed in the groove 6n of the clutch plate 6k of the thumb turn clutch 6. This state is a basic state in which the dead bolt 8 is unlocked, and the thumb turn 5 and the thumb turn clutch 6 are engaged to lock and unlock.
[0028]
In the basic state, as shown in FIG. 9B, when the thumb turn 5 is rotated by approximately 90 degrees, the thumb turn clutch 6 also rotates in the same direction. At this time, since the clutch plate 6k rotates about the axis a, the clutch ball 12 in the groove 6n is forcibly pushed in the circumferential direction indicated by the arrow. Then, the upper clutch ball 12 slips out of the concave portion 3a, fits into the concave portion 10b on the indicator side, and rolls on the outer peripheral surface of the outer cylinder 3 as shown in FIG. 9C.
[0029]
On the other hand, the lower clutch ball 12 falls into the recess 10b and is accommodated therein. However, as shown in FIG. 9B, the clutch ball 6k comes out of the recess 10b and fits into the recess 3a by the rotation of the clutch plate 6k. Further, as shown in FIG. 9C, the outer peripheral surface of the outer cylinder 3 is rolled.
[0030]
Therefore, when the clutch plate 6k rotates, the two clutch balls 12 roll on the outer peripheral surface of the outer cylinder 3 and the indicator 10 rotates around the axis a. Then, when the clutch ball 12 is rotated by approximately 90 degrees, the clutch balls 12 reach the concave portions 3b of the outer cylinder 3, respectively, and are in a state symmetrical to FIG.
[0031]
Thus, as shown in FIG. 10, in the thumb-turn lock 1, both notches 10 a of the indicator 10 are in the up and down direction in the unlocked state and are in the left and right direction in the locked state. Whether the thumb turn 5 is idle or not can be determined by observing the state of the key groove 12a of the cylinder lock 4. For example, the vertical state shown in FIG. This is a home mode in which locking and unlocking can be performed, and the horizontal state is a sleeping mode in which the thumb turn 5 idles.
[0032]
Although the two notches 10a are arranged so as to be more conspicuous than conventional indicators, the notch 10a may be colored so as to be more conspicuous, or conversely, the notch 10a The arc-shaped front end portion other than the above may be colored.
[0033]
Since the indicator 10 is rotated by the rotation of the clutch plate 6k of the thumb turn clutch 6, the indicator 10 is illegally operated by using a special tool from the outside to unlock the dead bolt 8. It is possible to try.
[0034]
However, in this case, as shown in FIG. 11A, when a part of the tool is engaged with the notch portion 10a to rotate the indicator 10 around the axis a, FIG. As shown in the figure, the corner 10 of the recess 10b presses the clutch ball 12 in the radial direction, causing galling. Therefore, the clutch ball 12 does not roll on the outer peripheral surface of the outer cylinder 3, and there is no possibility that the dead bolt 8 is unlocked via the thumb turn clutch 6.
[0035]
When the thus-formed thumb-turn lock 1 of the present invention is used by attaching it to a door A as shown in FIG. 10, for example, in the daytime home mode, the thumb bolt 5 locks the dead bolt 8. Unlocking is possible, and in the unlocked state, the notch 10a of the indicator 10 is in the vertical direction as shown in FIG. Further, when the door is locked, the notch 10a is in the left-right direction.
[0036]
In the sleeping mode at home, first, the dead bolt 8 is projected and locked by the thumb turn 5, so that the notches 10a are aligned in the left-right direction as described above. Then, in the cylinder lock 4, the key 12 is inserted into the key groove 12a which is in the vertical direction, the inner cylinder 2 is rotated by approximately 90 °, and the thumb turn clutch 6 is moved rearward via the cam member 6a by the pin 2b. As a result, the engagement with the thumb turn 5 is released, and the thumb turn 5 is brought into an idling state, so that the keyway 12a is in the horizontal direction.
When going out, the thumb turn 5 is idled and locked from the outside of the door A.
[0037]
In this manner, the locked / unlocked state of the thumb-turn lock 1 can be visually recognized by the position of the notch 10a, which is the display means of the indicator 10.
[0038]
【The invention's effect】
As described above, a thumb-turn lock according to the present invention is a thumb-turn lock for operating a thumb-turn on the indoor side to cause a deadbolt to protrude and retract from a door-side end face to lock and unlock, and the inner periphery of the cylindrical thumb-turn. Between the wall surface and the outer peripheral wall surface of the outer cylinder of the cylinder lock, a cylindrical indicator rotatable around the axis of the thumb turn lock is provided, and the front end surface of the indicator is exposed to the outside, and Since the display means for visually confirming the rotation of the indicator is provided on a part of the front end face, the indicator becomes easy for the resident to visually recognize, and has an excellent effect that an easy-to-understand operation is ensured even in an emergency. Things.
[0039]
Since the display means is a notch arranged at least one in the circumferential direction, the display means can be easily visually recognized by the naked eye. Further, the indicator is provided between the outer peripheral wall surface of the outer cylinder and the inner peripheral wall surface of the indicator, and is provided on the inner peripheral wall surface of the indicator, and a clutch ball which is rotated in a circumferential direction by a thumb-turn clutch. Since it is pivoted in the circumferential direction by the concave portion fitted to a part of the clutch ball, it is possible to prevent an unauthorized operation from the outside and to achieve an excellent effect that a thumb-lock lock with high security is obtained. is there. Further, the indicator is configured to be irreversibly rotated by the clutch ball, so that the number of parts is small and the cost is reduced.
[Brief description of the drawings]
FIG. 1 is a side view (A), a front view (B), and a rear view (C) of a thumb-turn tablet 1 according to the present invention.
FIG. 2 is a front view (A), a top view of an outer cylinder (B), a front view of an outer cylinder (C), and a side view (D) of a thumb-turn tablet 1 according to the present invention, showing an upper half in cross section. (E) is a cross-sectional view along the line CC.
FIG. 3 is a cross-sectional view showing a configuration of a cylinder lock 4 in the thumb-turn lock 1 according to the present invention (A), a cross-sectional view showing a state in which a key 12 is inserted into the cylinder lock 4, (B); FIG. 7C is a partial cross-sectional view (C) in a state where the key 12 has been rotated, and FIG.
4A is a perspective view of the thumb-turn clutch 6, and FIG. 4B is a perspective view schematically showing an arrangement relationship between the thumb-turn clutch 6, an indicator 10, and a clutch ball 12. FIG.
5A is an assembled perspective view of the inner cylinder 2 and the cam member 6a, FIG. 5B is a side view of the housing 7 with the cam member 6a housed therein, and FIG.
FIG. 6 is a perspective view of a driver 9;
FIG. 7A is a cross-sectional view showing a state in which the thumb turn 5 of the thumb turn lock 1 can be locked / unlocked, and FIG.
FIG. 8 is a front view (A), a cross-sectional view (B), and a rear view (C) of the indicator 10 of the thumb lock 1;
FIGS. 9A, 9B, and 9C are explanatory diagrams illustrating a rotating state of the indicator 10. FIGS.
FIG. 10 is an explanatory diagram showing a use state of the thumb turn lock 1.
FIGS. 11A and 11B are diagrams illustrating that an unauthorized operation using the indicator cannot be performed; FIGS.
FIG. 12 is a partial perspective view showing a state in which a conventional thumb-turn lock 20 is attached to a door A.
[Explanation of symbols]
1 Samtern lock, 2 inner cylinder,
2a tumbler pin, 2b pin,
3 outer cylinder, 3a recess,
3b recess, 4 cylinder lock,
5 thumb turn, 5a engagement recess,
6 Thumb turn clutch, 6a Cam member,
6c body part, 6d uphill,
6e flat part, 6f projection part,
6g fitting groove, 6h fitting groove,
6i cylindrical part, 6j base part,
6k clutch plate, 6m engagement projection,
6n groove, 7 housing,
7a guide groove, 8 dead bolt,
9 drivers, 10 indicators,
10a notch, 10b recess,
11 clutch spring, 12 clutch ball,
13 coil spring, 14 clutch ball,
15 Thumb turn clutch, 15a main body,
15b uphill, 15c flat,
15d protrusion, 15e cylinder,
15f fitting groove, 15g clutch plate,
15h engaging projection, 15i locking part,
21 Decoration ring.

Claims (3)

In the thumb turn lock for operating the thumb turn on the indoor side to make the dead bolt protrude and retract from the end face on the door side to lock and unlock,
A cylindrical indicator rotatable around the axis of the thumb turn lock is provided between the inner peripheral wall surface of the cylindrical thumb turn and the outer peripheral wall surface of the outer cylinder of the cylinder lock. And a display means is provided on a part of the front end face so as to make the rotation of the indicator visible.
A Samtern tablet characterized by the following. The display means is a notch arranged at least one in a circumferential direction,
The tablet according to claim 1, characterized in that: The indicator includes a clutch ball disposed between an outer peripheral wall surface of the outer cylinder and an inner peripheral wall surface of the indicator and rotated in a circumferential direction by a thumb turn clutch, and a clutch ball provided on an inner peripheral wall surface of the indicator. Being rotated in the circumferential direction by the concave portion fitted to a part of
The thumb-turn tablet according to claim 1 or 2, characterized in that:

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