HK1063497B - Side bar type cylinder lock with variable key code - Google Patents

Description

Side rod type variable coding cylinder lock

Technical Field

The present invention relates to a side-bar type variable-code cylinder lock head capable of changing the code of a key.

Background

When a single key to which a specific key code is assigned is stolen or lost, or when a worker who knows the key code returns to work, the cylinder lock is unlocked by an unauthorized means by a person who steals the single key, a person who picks up the single key, or a person who copies the single key according to the key code, and there is a risk that the cylinder lock will intrude into a room or approach a managed device. To remove this risk, the cylinder lock head needs to be replaced with a new one fitted with another key code.

However, the work of replacing the cylinder lock head mounted on the equipment or the door is very troublesome, and is undesirable because of unnecessary cost increase. In order to solve this problem, a side-bar type variable-code cylinder lock head capable of changing the key code has been known (see, for example, patent document 1: japanese unexamined patent application publication No. 197705).

The cylinder lock head has the structure that:

a housing formed in a cylindrical shape and having a side lever engaging recess and a return piece (retractor) engaging recess formed on an inner peripheral surface thereof;

a rotating member rotatably inserted into the housing, having a key hole and a reset key insertion hole formed in a front surface thereof, having a side bar receiving hole formed at one side of a guide key insertion hole intersecting the key hole, and having a tumbler receiving hole formed at the other side thereof;

a bar guide plate slidably inserted into the bar guide key insertion hole, having a side bar engaging recess formed on one side surface and a serrated engaging portion formed on the other side surface;

a variable guide key which is freely inserted into the guide key insertion hole, has a serrated engaged portion formed on one surface thereof and disengaged from the engaging portion, and has a key insertion groove communicating with the key hole;

a reversing piece which is inserted into the reversing piece accommodating hole, forms a guide part and a reset key insertion hole which enable the variable guide bar key to be in parallel sliding guide with the guide bar key insertion hole, and has one end clamped with a key inserted into the key insertion groove and the other end formed with a clamping protrusion which can be clamped with the reversing piece clamping concave part;

a side lever inserted into the side lever receiving hole, the front end of which is forced in the direction of being clamped into the side lever clamping concave part and the rear end of which is clamped into the side lever clamping concave part when moving in the direction opposite to the force application direction;

and a key for reconstitution that pushes the engaging protrusion of the tumbler in a direction of being engaged with the tumbler engaging recess when the key for reconstitution is inserted into the key insertion hole and the key for reconstitution insertion hole and rotated.

In the conventional variable-code cylinder lock head configured as described above, since the re-key insertion hole for driving the return piece is formed in addition to the normal key hole in the front surface of the rotary member, the re-key insertion hole is not only uncomfortable in appearance but also subject to tampering, and foreign matter or the like may be blocked by a misbehaving person or the like or the operation of changing the key code may be hindered. Further, when the key code is changed, a re-key and a single key which are close to each other are inserted into the turning member, and the mutual existence thereof interferes with the operation, and thus the operability is poor.

Further, since the internal structure is complicated and the number of parts is large, it is difficult to manufacture the electronic device at low cost.

Disclosure of Invention

The present invention has an object to provide a side-bar type cylinder lock head with a variable code, which has a good appearance and a good durability, is easy to change a key code, and can be manufactured at a low cost because only an opening of a normal key hole is provided in a front surface of a rotating member, and an additional part such as a key and a return piece is not required in a conventional cylinder lock head with a variable code, and an internal structure is simplified.

Another object is to provide a side-lever type variable-coding cylinder lock head which is firmly constructed so that the rotation of a rotary member with respect to a housing is restricted at 2.

The side-lever type variable code cylinder lock according to the invention of claim 1 is configured to include:

a case 1 formed in a cylindrical shape and having a side lever bracket engaging recess 2 and a side lever engaging recess 5 formed on an inner peripheral surface thereof;

a rotating member 6 rotatably inserted into the housing 1, having a keyhole 7 with an open front face formed in an axial direction, a side bar holder receiving hole 9 formed on one side of a guide key insertion hole 8 intersecting the keyhole 7, and a spring receiving hole 10 formed on the other side;

a bar guide plate 11 slidably inserted into the bar key insertion hole 8, having a side bar engaging recess 12 formed on one side surface and an engaging portion 13 formed on the other side surface; a variable bar key 14 slidably inserted into the bar key insertion hole 8, having a serrated engaged portion 15 formed on one surface thereof to be engaged with and disengaged from the engaging portion 13, and having a key insertion groove 17 formed in a central portion thereof to communicate with the key hole 7;

a 1 st spring 18 which is accommodated in the spring accommodation hole 10 and slidably urges the variable guide key 14 toward the inner peripheral surface of the housing 1;

a side bar holder 19 slidably inserted into the side bar holder receiving hole 9, having a side bar receiving hole 20 formed in a central portion thereof, and having a protrusion 21 formed on one surface thereof engaged with the side bar holder engaging recess 2 when the turning member 6 is rotated; a side lever 22 slidably inserted into the side lever receiving hole 20, a tip end portion 23 of which is biased in a direction in which the side lever engaging recess 5 is engaged, and which moves in a direction opposite to the biasing direction when the turning member 6 is rotated, so that a base end portion 24 of which is engaged with the side lever engaging recess 12;

and a 2 nd spring 25 for biasing the bar guide plate 11 toward the side bar holder 19, and when the raised portion 21 faces the side bar holder engagement recess 2 by the rotation of the turning member 6, for inserting the side surface end portion 26 of the bar guide plate 11 into the side bar holder receiving hole 9, for engaging the raised portion 21 into the side bar holder engagement recess 2, and for disengaging the engaging portion 13 of the bar guide plate 11 from the engaged portion 15 of the variable bar key 14.

A side bar type variable code cylinder lock head according to the invention of claim 2 is the side bar type variable code cylinder lock head according to the invention of claim 1, wherein a 1 st variable guide key engagement recess and a 2 nd variable guide key engagement recess 4 are formed in an inner peripheral surface of the housing 1, a locking projection 16 is formed at one end of the variable guide key 14, a tip end portion 23 of the side bar 22 is engaged with the side bar engagement recess 5 of the housing 1, and the locking projection 16 is engaged with the 1 st variable guide key engagement recess 3 when a base end portion of the side bar 22 abuts against a side surface end portion 26 of the guide bar plate 11.

[ Effect of the invention ]

In the locked state shown in fig. 5, the locking projection 16 of the variable bar key 14 is engaged with the 1 st variable bar key engagement recess 3 of the housing 1, and is held at this position by the biasing force of the 1 st spring 18. The side bar holder 19 is positioned in the side bar holder receiving hole 9 of the turning member 6, and the front end portion 23 of the side bar 22 is engaged with the side bar engaging recess 5 of the housing 1, and the rear end portion 24 abuts against the side surface end portion 26 of the guide bar plate 11, thereby being held at this position. The flight 11 is located closest to the variable guide key 14, and the engaging portion 13 of the flight 11 engages with the serration engaged portion 15 of the variable guide key 14.

In order to release the rotation restriction of the turn member 6 with respect to the housing 1 and rotate the turn member 6 in the unlocking direction, a single key K corresponding to the current key code is inserted into the key hole 7 of the turn member 6.

When the single key K is inserted, the inner end surface of the key insertion groove 17 of the variable bar key 14 is pressed by a key code portion (so-called key top) formed on the side edge portion of the single key K, so that the variable bar key 14 and the bar guide plate 11 slide integrally, and the locking projection 16 of the variable bar key 14 is disengaged from the 1 st variable bar key engagement recess 3 of the housing 1.

At this stage, the side bar engaging recess 12 of the guide bar plate 11 is moved to a position facing the rear end 24 of the side bar 22, and therefore, when the turning member 6 is turned counterclockwise in fig. 7 by a single key K, the side bar 22 at the beginning of the turning is pushed out from the side bar engaging recess 5 by the cam slope portion of the front end 23 to the cam slope portion of the side bar engaging recess 5, and the rear end 24 of the side bar 22 enters the side bar engaging recess 12 of the guide bar plate 11.

The turning operation of the turning member 6 is performed until the side lever bracket 19 is positioned in front of the key changing position facing the side lever bracket engaging recess 2 of the housing 1, and the turning member 6 reaches the unlocking position.

When the key code of the cylinder lock head is to be changed due to the theft of a single key, etc., the change key CK is inserted into the key hole 7 of the turning member 6.

When the change key CK is inserted, the inner end surface of the key insertion groove 17 of the variable bar key 14 is pressed by the key code portion of the change key CK, the variable bar key 14 slides integrally with the bar guide plate 11, and the locking projection 16 of the variable bar key 14 is disengaged from the 1 st variable bar key insertion recess 3 of the housing 1.

At this stage, since the side bar engaging recess 12 of the guide bar plate 11 is moved to a position facing the rear end 24 of the side bar 22, when the turning member 6 is turned counterclockwise in fig. 5 by the change key CK, the cam slope portion of the front end 23 is pushed out by the side bar engaging recess 5 by the cam slope portion of the side bar engaging recess 5 at the beginning of the turning, and the rear end 24 of the side bar 22 enters the side bar engaging recess 12 of the guide bar plate 11.

The turning operation of the turning member 6 is performed until the side bar holder 19 is at the key changing position facing the side bar holder engagement recess 2 of the housing 1.

When the key change position is reached, the side surface end 26 of the guide bar plate 11 is inserted into the side bar holder receiving hole 9 of the turning member 6 by the biasing force of the spring 25, and the raised portion 21 of the side bar holder 19 pushed by the side surface end 26 is engaged with the side bar holder engaging recess 2. As a result, the bar guide plate 11 is largely separated from the variable bar guide 14, and the engaging portion 13 of the bar guide plate 11 is disengaged from the serration engaged portion 15 of the variable bar guide 14.

Then, the change key CK is advanced and retreated in the longitudinal direction of the guide key insertion hole 8 of the rotary member 6, that is, in the transverse direction of the rotary member 6, thereby pushing the variable guide key 14. At this time, since the side surface end 26 is engaged with the side bar holder receiving hole 9 of the turning member 6, the gib 11 is located at the fixed position, and the variable gib 14 moves relative to the fixed gib 11, so that the key code is changed.

When the change key CK is pulled out from the key hole 7 and another single key K having the changed key code is inserted and rotated in the reverse direction, the side surface of the raised portion 21 is pushed toward the edge of the side bar holder engaging recess 2, and the raised portion 21 is pushed back into the side bar holder receiving hole 9 of the turning member 6, whereby the side surface end 26 of the bar guide plate 11 is pushed out from the side bar holder receiving hole 9, the bar guide plate 11 approaches the variable bar key 14, and the engaging portion 13 of the bar guide plate 11 engages with the serration engaged portion 15 of the variable bar key 14. The engagement position of the engaging portion 13 and the engaged portion 15 is changed by the pushing operation of the variable guide key 14.

In the side-bar-type variable code cylinder lock head according to the invention of claim 1, in changing the key code, when a new single key K is inserted into the keyhole 7 of the turning member 6 to rotate the turning member 6, and the protrusion 21 of the side bar holder 19 faces the side bar holder engaging recess 2 of the housing 1, the side end 26 of the guide bar plate 11 is inserted into the side bar holder receiving hole 9 of the turning member 6 by the biasing force of the spring 25, whereby the protrusion 21 is engaged with the side bar holder engaging recess 2, the engaging portion 13 of the guide bar plate 11 is disengaged from the serration engaged portion 15 of the variable guide key 14, and the variable guide 14 is moved by a required unit after the disengagement, and finally, the key code changing operation can be easily performed by only re-engaging the engaging portion 13 with the engaged portion 15 of the variable guide key 14, and an extra key and a return piece such as a re-fitting key and a return piece as in the conventional variable code cylinder lock head described above are not required The components can be manufactured at low cost because the internal structure can be simplified.

Since only the opening of the normal keyhole 7 is formed in front of the rotary member 6, the appearance is good and the rotary member is resistant to tampering.

In the side bar type variable code cylinder lock head according to the invention of claim 2, the guide bar plate 11 and the variable guide bar 14 are inserted into the guide bar insertion hole 8 of the turning member 6 in a state where the engaging portion 13 and the engaged portion 15 are engaged with each other, the locking projection 16 of the variable guide bar 14 is engaged with the 1 st variable guide bar engaging recess 3 of the housing 1, and the side bar holder 19 is inserted into the side bar holder receiving hole 9 of the turning member 6, and since the tip portion 23 of the side bar 22 inserted into the side bar receiving hole 20 of the side bar holder 19 is engaged with the side bar engaging recess 5 of the housing 1 and the base portion 24 of the side bar 22 is brought into contact with the side surface end portion 26 of the guide bar plate 11, the rotation restriction of the turning member 6 with respect to the housing 1 can be performed at the 2 of the upper locking projection 16 and the side bar 22, and the locking can be performed with stronger kinetic energy.

Brief description of the drawings

Fig. 1 is a front view of a sidebar-type variable encoding cylinder lock cylinder according to an embodiment of the present invention.

Fig. 2 is a left side view of the cylinder lock of fig. 1.

Fig. 3 is a right side view of a key for use with the cylinder lock of fig. 1.

Fig. 4 is a sectional view taken along line a-a of fig. 1.

Fig. 5 is a sectional view taken along line B-B of fig. 2.

Fig. 6 is a front view of a housing for the cylinder lock of fig. 1.

Fig. 7 is a cross-sectional view taken along line C-C of fig. 6.

Fig. 8 is a front view of a rotating member for the cylinder lock of fig. 1.

Fig. 9 is a top view of the rotating member of fig. 8.

Fig. 10 is a sectional view taken along line D-D of fig. 8.

Fig. 11 is a sectional view taken along line E-E of fig. 8.

Fig. 12 is a sectional view taken along line F-F of fig. 11.

FIG. 13 is a front view of a sidebar cartridge for the cylinder lock of FIG. 1.

FIG. 14 is a right side view of a sidebar for the cylinder lock of FIG. 1.

Fig. 15 is an enlarged front view of a variable guide key for the cylinder lock of fig. 1.

Fig. 16 is a left side view of the variable guide key of fig. 15.

Fig. 17 is an enlarged front view of a bar guide plate for the cylinder lock of fig. 1.

Fig. 18 is a right side view of the bar guide plate of fig. 17.

Fig. 19 is an enlarged front view of a bar guide biasing spring for use in the cylinder lock of fig. 1.

Detailed Description

In the illustrated embodiment, as shown in fig. 5 and 15, a spring receiving portion 27 is provided to protrude from the other side surface of the variable guide key 14, and the 1 st spring 18 for biasing the variable guide key, which is formed of a compression coil spring, is compressed between the bottom of the spring receiving hole 10 and the spring receiving portion 27. As shown in fig. 17, the other side surface of the bar guide plate 11 is provided with 1 engaging portion 13 at each end, and as shown in fig. 18, the spring support portion 28 is provided in a pin shape protruding from the back surface side at the center portion of the side surface.

As shown in fig. 19, the bar guide biasing spring 25 is formed of a torsion coil spring, a coil portion 25a at the center portion is fitted to the spring support portion 28, and the front end annular bent portions 25d and 25e of the 2 straight portions 25b and 25c are abutted against the one side surface of the variable bar guide 14 as shown in fig. 5. The distance between the straight line passing through the centers of the 2 annular curved portions 25d and 25e and the center of the spiral portion 25a varies according to the contact and separation of the bar guide plate 11 and the variable bar guide 14.

The bar guide plate biasing spring 25 and the spring support portion 28 are accommodated in a retreat groove 29 formed in an inner wall surface of one half of the bar guide key insertion hole 8 as shown in fig. 9, 11, and 12.

As shown in fig. 8 and 10, the key hole 7 is formed offset to one side from the center of the rotary member 6. As shown in fig. 13, the raised portion 21 of the side bar bracket 19 is formed in a low mountain shape. As shown in fig. 14, the side bars 22 are formed in a substantially hexagonal shape in cross section, and the front end portions 23 and the rear end portions 24 are formed in a mountain peak shape. As shown in fig. 16, a guide projection 30 is projected from the back surface of the spring receiving portion 27 of the variable bar key 14, and when the variable bar key 14 slides in the transverse direction of the rotary member 6, the guide projection 29 moves in the spring receiving hole 10.

The rotation angle control plate and the stopper plate are fixed to the rear end of the rotating member 6 according to a general method.

Claims (2)

1. A side lever type variable coding cylinder lock head is characterized by comprising:

a case (1) formed in a cylindrical shape and having a side lever bracket engaging recess (2) and a side lever engaging recess (5) formed on an inner peripheral surface thereof;

a rotating member (6) which is rotatably inserted into the housing (1), has a keyhole (7) with an open front face formed in the axial direction, and has a side lever holder receiving hole (9) formed on one side of a guide key insertion hole (8) intersecting the keyhole (7) and a spring receiving hole (10) formed on the other side;

a bar guide plate (11) slidably inserted into the bar key insertion hole (8), having a side bar engagement recess (12) formed on one side surface and an engagement portion (13) formed on the other side surface;

a variable guide key (14) slidably inserted into the guide key insertion hole (8), having a serrated engaged portion (15) formed on one surface thereof to engage with and disengage from the engaging portion (13), and having a key insertion groove (17) formed in a central portion thereof so as to communicate with the key hole (7);

a 1 st spring (18) which is accommodated in the spring accommodating hole (10) and slidably urges the variable bar guide key (14) toward the inner peripheral surface of the housing (1);

a side lever bracket (19) which is slidably inserted into the side lever bracket receiving hole (9), has a side lever receiving hole (20) formed in the center portion thereof, and has a raised portion (21) formed on one surface thereof which is engaged with the side lever bracket engaging recess (2) when the turning member (6) is rotated;

a side lever (22) slidably inserted into the side lever receiving hole (20), the tip end portion (23) of which receives a biasing force in a direction of being engaged with the side lever engaging recess (5), and which moves in a direction opposite to the biasing force when the turning member (6) is rotated, so that the base end portion (24) of which is engaged with the side lever engaging recess (12);

and a 2 nd spring (25) that biases the bar guide plate (11) toward the side bar holder (19), and when the raised portion (21) faces the side bar holder engagement recess (2) by rotation of the turning member (6), causes a side surface end portion (26) of the bar guide plate (11) to enter the side bar holder receiving hole (9), causes the raised portion (21) to engage in the side bar holder engagement recess (2), and causes the engaging portion (13) of the bar guide plate (11) to disengage from the engaged portion (15) of the variable bar guide (14).

2. The variable-coding cylinder lock according to claim 1, wherein a 1 st variable guide key insertion recess (3) and a 2 nd variable guide key insertion recess (4) are formed in an inner peripheral surface of the housing (1), a locking protrusion (16) is formed at one end of the variable guide key (14), a tip end portion (23) of the side lever (22) is engaged with the side lever bracket insertion recess (5) of the housing (1), and the locking protrusion (16) is engaged with the 1 st variable guide key insertion recess (3) when a base end portion of the side lever (22) abuts against a side surface end portion (26) of the guide plate (11).