JP2016108869A - Cylinder lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cylinder lock capable of being locked and unlocked by a single-keyway key even in a state where side faces of the key are turned upside down.SOLUTION: A cylinder lock 10 is locked and unlocked by a single-keyway key 40 with a key plate 11. Vertically asymmetric inner groove 43 is formed in a key width direction only on one side face of the key plate. The cylinder lock comprises: a cylindrical rotor case 12; a key insertion hole 21, which is rotatably stored inside the rotor case 12 and formed in a rotation axis direction; a rotor 20 with multiple tumbler housing holes 24 that communicate and intersect with the insertion hole 21; and multiple tumblers 30, which are movably stored in the tumbler housing holes 24 through a spring member 27 and have a tumbler hole 33 that communicates with the key insertion hole 21. The tumbler hole 33 comprises: a first engagement projection 36a capable of engaging to the inner groove 43; and a second engagement projection 36b capable of engaging to the inner groove 43 in a state where side faces of the key plate 11 are turned upside down.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a cylinder lock that is locked and unlocked by a mechanical key.

  As an example of a cylinder lock that is locked and unlocked by a mechanical key, for example, a cylinder lock that is locked and unlocked by a single groove key in which an inner groove is formed only on one side of a key plate has been proposed (for example, (See Patent Document 1).

  The cylinder lock described in Patent Document 1 includes a cylinder having an engaging recess on the inner peripheral surface of the cylinder. A rotor is rotatably accommodated in the cylinder of the cylinder. Inside the rotor, a plurality of sets of tumblers are arranged along the rotor rotation axis direction, with a state in which the first plate tumblers and the second plate tumblers are alternately in contact with each other as a set of tumblers.

  Engaging protrusions that engage with the inner grooves of the single groove keys are formed in the tumbler holes for inserting the single groove keys formed on the flat surfaces of the first plate tumbler and the second plate tumbler. The engaging protrusions of the first plate tumbler and the engaging protrusions of the second plate tumbler are engaged with the inner grooves of the one-groove key in a state where they are biased in the opposite directions.

  When the single groove key is not inserted into the key insertion hole of the rotor, the ends of all the tumblers are engaged with the engagement recesses of the cylinder, and the locked state that prevents the rotation of the rotor is maintained.

  On the other hand, when the single groove key is inserted into the key insertion hole of the rotor, the engagement protrusions of all the tumblers engage with the inner groove of the single groove key. Each tumbler moves inward in the rotor radial direction against the biasing force and is immersed in the rotor. The engagement between the end of the tumbler and the engagement recess of the cylinder is released, and the cylinder lock is in an unlocked state that allows the rotor to rotate.

JP 2005-344305 A

  The inner groove of the single groove key is asymmetric in the key width direction, and even if the side surface of the key plate is turned upside down and the single groove key is inserted into the key insertion hole of the rotor, The step with the inner groove of the single groove key does not match. Even if the side of the single groove key is turned upside down, it does not have a reversible function that enables locking and unlocking of the cylinder lock, so the convenience of the cylinder lock that locks and unlocks with the single groove key is improved. There was a request to increase it.

  An object of the present invention is to provide a cylinder lock that can be locked and unlocked even when the side surface of a single groove key is turned upside down.

[1] The present invention is a cylinder lock that is locked and unlocked by a single groove key in which an inner groove that is vertically asymmetric in the key width direction is formed on only one side surface of a key plate, and a cylindrical rotor case; A rotor that is rotatably accommodated inside the rotor case, and has a key insertion hole formed in a rotation axis direction, and a plurality of tumbler accommodation holes formed in a direction communicating with and intersecting the key insertion hole; A plurality of tumblers having a tumbler hole that is movably accommodated in a tumbler accommodating hole via a spring member and communicates with the key insertion hole, and the tumbler hole is engageable with the inner groove. The cylinder lock includes an engagement protrusion and a second engagement protrusion that can be engaged with the inner groove in a state where the side surface of the key plate is turned upside down.

[2] The tumbler receiving hole according to [1] is configured such that the tumbler is movably received against the urging force of the spring member, and the tumbler is urged by the spring member. It has the 2nd tumbler accommodation hole accommodated so that it can move against the urging | biasing force of the opposite direction, It is characterized by the above-mentioned.

[3] The tumbler hole according to the above [1] or [2] has a first opposed inner surface facing one side surface of the key plate and a second opposed inner surface facing the other side surface of the key plate. The first engaging protrusion is formed to protrude from the first facing inner surface, and the second engaging protrusion is formed to protrude from the second facing inner surface. It is characterized by.

  According to the present invention, the side surface of the single groove key can be used upside down, and the convenience of the cylinder lock that performs locking and unlocking with the single groove key can be improved.

It is a perspective view for demonstrating the cylinder lock which concerns on 1st Embodiment suitable for this invention. It is a principal part disassembled perspective view of the rotor used for the cylinder lock which concerns on 1st Embodiment. (A) is a partially cutaway plan view for explaining an example of a single groove key used in the cylinder lock according to the first embodiment, and (b) is a view when the rotor of FIG. 2 is viewed from above. It is a top view, (c) is a top view when the rotor of FIG. 2 is seen from the lower direction. FIG. 4 is an enlarged cross-sectional view taken along line IV-IV in FIG. It is the VV arrow directional cross-sectional enlarged view of FIG.3 (c). (A) is a top view of the tumbler arrange | positioned in the position corresponding to FIG. 4, Comprising: The figure for demonstrating an engagement state with the tumbler when the side surface of a single groove key is reversed up and down, (b) ) Is a plan view of the tumbler arranged at a position corresponding to FIG. 5, and is a diagram for explaining an engagement state with the tumbler when the side surface of the single groove key is turned upside down. It is a top view of the tumbler used for the cylinder lock concerning a 2nd embodiment.

  Preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings.

[First Embodiment]
(Appearance structure of cylinder lock)
In FIG. 1, reference numeral 10 indicating the whole illustrates a typical cylinder lock in the first embodiment. The cylinder lock 10 is provided with a key cylinder 11 that is assembled to the door of the vehicle body.

  The key cylinder 11 includes a cylindrical rotor case 12 and a rotor 20 that is housed and supported rotatably inside the rotor case 12. An attachment cover 13 for attaching to a door panel (not shown) is attached to the outer periphery on the front end side of the key cylinder 11.

  The cylinder lock 10 is coupled to a door lock mechanism (not shown) assembled to the vehicle body via a coupling device 1 capable of transmitting a rotation operation of a single groove key 40 that is a mechanical key. The coupling device 1 includes a holder 2 that is coupled to a rotor 20 of the key cylinder 11 via a sleeve (not shown) so as to be integrally rotatable, and a long bar-shaped base end that is tiltably coupled to the holder 2. And a lever 3. The tip of the lever 3 is connected to a door lock mechanism.

(Configuration of single groove key)
As shown in FIGS. 1 and 3A, the single groove key 40 has a long plate-like key plate 42 that is integrated with the grip portion 41. On one side which is the surface of the key plate 42, an inner groove 43 having a wavy undulation is formed along the key insertion / removal direction.

  The inner groove 43 of the one-groove key 40 has a first inner surface 44 and a second inner surface 45 that are asymmetric in the vertical direction in the key width direction. On the first inner surface 44 of the inner groove 43, four first engaging portions 44a to 44d that engage with the plate-like tumbler 30 are formed along the key insertion / extraction direction. On the second inner surface 45 of one inner groove 43, four second engaging portions 45a to 45d that engage with the plate-like tumbler 30 are formed along the key insertion / extraction direction.

(Internal configuration of cylinder lock)
As shown in FIGS. 1 and 2, the rotor 20 of the key cylinder 11 is disposed on the opposite side of the front end 22 and the front end 22 where the key insertion hole 21 for inserting the single groove key 40 is formed. It consists of a cylindrical body having an end 23 and is configured to be rotatable between a lock position and a lock release position when the key insertion hole 21 is viewed from the front by a single groove key 40 inserted into the key insertion hole 21. .

  Four tumbler housing holes 24,..., 24 are formed in the outer peripheral surface of the rotor 20 along the rotation axis direction so as to penetrate in the radial direction through the openings. In the tumbler housing hole 24, four upper tumblers 31a to 31d inserted from the opening on the upper outer peripheral surface of the rotor 20 and four lower tumblers 32a to 32d inserted from the opening on the lower outer peripheral surface are movable. Is housed in.

  According to the illustrated example, the tumbler accommodation hole 24 includes the first and second tumbler accommodation holes 25 and 26 that accommodate the lower tumbler 32 and the upper tumbler 31 in a state of being alternately opposed to each other as a pair of accommodation chambers. The set of storage chambers is divided into four storage chambers at a predetermined interval in the rotation axis direction of the rotor 20.

  A spring accommodation hole 24 a for accommodating the coil spring 27 is formed at one end of the tumbler accommodation hole 24 so as to communicate therewith. The coil spring 27 biases the upper tumblers 31a to 31d and the lower tumblers 32a to 32d in opposite directions in accordance with the undulation of the inner groove 43 of the one-groove key 40.

  As shown in FIGS. 2, 4, and 5, the upper tumblers 31 a to 31 d are biased toward the upper outer peripheral surface of the rotor 20 by the spring force of the coil spring 27, and the lower tumblers 32 a to 32 d are The spring force is biased toward the lower outer peripheral surface of the rotor 20.

  At both ends of the upper tumblers 31a to 31d and the lower tumblers 32a to 32d in the moving direction, protruding end portions 34 and 34 that engage with engaging holes 11a formed through the inner and outer peripheral surfaces of the key cylinder 11 are formed to protrude. A spring receiving portion 35 that receives the spring force of the coil spring 27 protrudes from one end face of the upper tumblers 31a to 31d and the lower tumblers 32a to 32d.

  A substantially square tumbler hole 33 through which the one-groove key 40 is inserted is formed through an intermediate portion between the flat surfaces of the upper tumblers 31a to 31d and the lower tumblers 32a to 32d.

  The tumbler hole 33 has a first opposing inner surface 33 a that faces one side surface of the single groove key 40 and a second opposing inner surface 33 b that faces the other side surface of the single groove key 40. A first engagement protrusion 36a protrudes from the first opposing inner surface 33a. The first engagement protrusion 36 a engages with the first engagement portions 44 a to 44 d of the single groove key 40.

  A second engagement protrusion 36b that faces the first engagement protrusion 36a is formed on the second opposite inner surface 33b so as to protrude. The second engagement protrusion 36b engages with the second engagement portions 45a to 45d of the single groove key 40.

In the first engaging portions 44a to 44d of the single groove key 40, as shown in FIGS. 3A to 3C, the first engaging protrusions of the four upper tumblers 31a to 31d are provided. As positions corresponding to the part 36a, positions P _{1 to} P _{4 at four} positions on the upper side of the central axis X in the key insertion / extraction direction are assigned.

On the other hand, in the second engagement portions 45a to 45d of the single groove key 40, the central axis in the key insertion / removal direction is a position corresponding to the second engagement protrusions 36b of the four lower tumblers 32a to 32d. Four positions P _{5 to} P ₈ on the lower side of X are assigned.

  The first engagement protrusions 36 a for the upper tumbler 31 and the second engagement protrusions 36 b for the lower tumbler 32 function as verification protrusions for immersing in the tumbler accommodation hole 24 of the rotor 40.

The four first engaging protrusions 36 a for the upper tumbler 31 are formed at positions corresponding to the positions P _{1 to} P ₄ in a state where the single groove key 40 is inserted into the tumbler hole 33. On the other hand, the four second engaging protrusions 36 b for the lower tumbler 32 are formed at positions corresponding to the positions P _{5 to} P ₈ in a state where the single groove key 40 is inserted into the tumbler hole 33. .

  When the single groove key 40 is not inserted into the key insertion hole 21 of the rotor 20, all the tumblers 30 are engaged with the engagement holes 11 a of the cylinder 11 through the openings of the tumbler accommodation holes 24 of the rotor 20. . Therefore, the rotor 20 cannot rotate with respect to the cylinder 11, and the locked state that prevents the rotation of the rotor 20 is maintained.

  On the other hand, when the single groove key 40 is inserted into the tumbler hole 33 of the upper tumbler 31 and the lower tumbler 32 through the key insertion hole 21 of the rotor 20, as shown in FIGS. 4 and 5, all the upper tumblers 31. And the engagement between the lower tumbler 32 and the engagement hole 11a of the cylinder 11 is released.

  All the upper tumblers 31 move downward in the tumbler accommodation holes 24 of the rotor 20 through the engagement holes 11 a of the cylinder 11 while receiving the spring force of the coil springs 27 upward by the spring receiving portions 35. Each of the first engaging protrusions 36 a for the upper tumbler 31 engages with the first engaging portions 44 a to 44 d of the single groove key 40.

  On the other hand, all the lower tumblers 32 move upward in the tumbler accommodation holes 24 of the rotor 20 via the engagement holes 11 a of the cylinder 11 while receiving the spring force of the coil springs 27 downward by the spring receiving portions 35. Each of the second engaging protrusions 36 b for the lower tumbler 32 engages with the second engaging portions 45 a to 45 d of the single groove key 40.

  Therefore, the engagement between the first engagement protrusion 36 a for the upper tumbler 31 and the second engagement protrusion 36 b for the lower tumbler 32 and the engagement hole 11 a of the cylinder 11 is released, and the cylinder 11 The unlocked state allows the rotation of the rotor 20.

(Reversible configuration)
As shown in FIGS. 3A to 6B, the cylinder lock 10 configured as described above has a side surface of the single groove key 40 in which the undulation of the inner groove 43 is asymmetric in the vertical direction. Even if it is used by turning it upside down, it is configured as a reversible specification that enables locking and unlocking operations.

In the first engaging portions 44a to 44d of the inner groove 43 in which the side surface of the key plate 42 is turned upside down, as shown in FIG. 3A, there are four places on the upper side of the central axis X in the key insertion / extraction direction. As the positions corresponding to the positions P _{1 to} P ₄ , positions P ₁₁ , P ₂₁ , P ₃₁ , and P _{41 at} the lower side of the central axis X in the key insertion / extraction direction are assigned.

On the other hand, in the second engaging portions 45a to 45d of the inner groove 43 in which the side surface of the key plate 42 is turned upside down, the positions P _{5 to} P ₈ are located at the lower four positions of the central axis X in the key insertion / removal direction. As the corresponding positions, positions P ₅₁ , P ₆₁ , P ₇₁ , P _{81 at} the upper four positions of the central axis X in the key insertion / extraction direction are assigned.

  In the upper tumbler 31, as shown in FIGS. 4 and 6A, the second engagement portions 45 a to 45 d of the one-groove key 40 are not connected to the second engagement portions 45 a to 45 d with the side surfaces of the key plate 42 turned upside down. Two engaging protrusions 36b are engaged. In the lower tumbler 32, as shown in FIGS. 5 and 6B, the first engagement portions 44a to 44d of the one-groove key 40 have the side surfaces of the key plate 42 turned upside down. The first engagement protrusion 36a is engaged.

  The second engagement protrusion 36b for the upper tumbler 31 and the first engagement protrusion 36a for the lower tumbler 32 are immersed in the tumbler accommodation hole 24 of the rotor 40 with the side surface of the key plate 42 turned upside down. It functions as a collation protrusion for making it happen.

The four second engaging protrusions 36b for the upper tumbler 31 are, as shown in FIGS. 3 (a), 4 and 6 (a), a single groove key in which the side surface of the key plate 42 is turned upside down. In a state where 40 is inserted through the tumbler hole 33, it is formed at a position corresponding to the positions P ₁₁ , P ₂₁ , P ₃₁ , P ₄₁ .

On the other hand, the four first engaging protrusions 36a for the lower tumbler 32 are pieces in which the side surface of the key plate 42 is turned upside down as shown in FIGS. 3 (a), 5 and 6 (b). In a state where the groove key 40 is inserted into the tumbler hole 33, the groove key 40 is formed at a position corresponding to the positions P ₅₁ , P ₆₁ , P ₇₁ , P ₈₁ .

When the side surface of the single groove key 40 is turned upside down and the single groove key 40 is inserted into the tumbler holes 33 of the upper tumblers 31a to 31d and the lower tumblers 32a to 32d through the key insertion holes 21 of the rotor 20, As shown in FIGS. 3A, 4 and 6A, the upper tumblers 31a to 31d receive the spring force of the coil spring 27 upward from the spring receiving portion 35 while engaging the engagement holes 11a of the cylinder 11. Is moved downward in the tumbler accommodation hole 24 of the rotor 20. Each of the second engaging protrusions 36b for the upper tumblers 31a to 31d engages with the positions P ₁₁ , P ₂₁ , P ₃₁ , and P ₄₁ of the single groove key 40.

On the other hand, as shown in FIGS. 3A, 5, and 6 B, all the lower tumblers 32 a to 32 d receive the spring force of the coil spring 27 downward from the spring receiving portion 35, while It moves upward in the tumbler accommodation hole 24 of the rotor 20 through the engagement hole 11a. Each of the first engaging projection 36a for the lower tumblers 32 a to 32 d, to engage the positions _{P 51, P 61, P 71} , P 81 pieces groove key 40.

  Accordingly, the engagement between the second engagement protrusion 36b for the upper tumblers 31a to 31d and the first engagement protrusion 36a for the lower tumblers 32a to 32d and the engagement hole 11a of the cylinder 11 is released, and the cylinder 11 is in an unlocked state in which the rotation of the rotor 20 is allowed.

(Effects of the first embodiment)
According to the cylinder lock 10 configured as described above, the following effects can be obtained in addition to the above effects.

(1) Even with the single groove key 40 in which the inner groove 43 is formed only on one side surface of the key plate 42, a cylinder structure in which the key insertion / removal direction is not restricted can be obtained.
(2) The mechanical key can be thinned and miniaturized by the single groove key 40, and the cylinder lock 10 corresponding to the single groove key 40 can be miniaturized.
(3) There is no need to worry about the front and back surfaces of the key plate 42, and the key plate 42 can be easily inserted into the cylinder lock 10 as compared with the outer groove key formed on the outside.
(4) The key plate 42 can be folded into the key case and replaced with a double groove key having inner grooves formed on both side surfaces of the key plate 42 without reducing the operability of a jack knife key or the like that can be stored. Key 40 can be employed.

[Second Embodiment]
Referring to FIG. 7, one configuration example of the tumbler 31 used in the cylinder lock 10 according to the second embodiment is shown. In the second embodiment, except for the configuration of the positioning protrusions 37a and 37b of the tumbler 31, the other configurations have the same configurations as those of the first embodiment. Therefore, by using the same member code as the member code used in the first embodiment, detailed description about the member is omitted.

  In FIG. 7, on the first opposing inner surface 33a of the tumbler hole 33 in the upper tumbler 31, a first engagement protrusion 36a and a first positioning protrusion 37a that can be engaged with the inner groove 43 of the single groove key 40 are shown. Are projected in line in the vertical direction.

  On the other hand, on the second opposing inner surface 33b of the tumbler hole 33, a second engaging protrusion 36b that opposes the first engaging protrusion 36a and a second positioning protrusion that opposes the first positioning protrusion 37a. The portion 37b is formed so as to protrude in the vertical direction.

  The first positioning protrusion 37 a and the second positioning protrusion 37 b have a function of determining the position and posture of the tumbler 31 in the tumbler housing hole 24 of the rotor 20. When the single groove key 40 is inserted into the tumbler hole 33 of the upper tumbler 31, the positioning protrusions 37 a and 37 b of the tumbler 31 are guided while being in contact with both side surfaces of the key plate 42.

(Effect of the second embodiment)
Even in the second embodiment, the same effect as in the first embodiment can be obtained. In addition, the following effects can be obtained.

  The strength reduction of the tumbler 31 can be prevented, and the tumbler 31 can be smoothly moved to the tumbler accommodation hole 24 of the rotor 20.

[Modification]
As described above, the representative configuration example of the input device 1 according to the present invention has been described with reference to the above-described embodiments, modification examples, and illustrated examples. However, the following modification examples are also possible.

  In the first embodiment, the rotor 20 having the first and second tumbler housing holes 25 and 26 for housing the upper tumbler 31 and the lower tumbler 32 in a state of being alternately opposed to each other is provided. However, the present invention can also be applied to a configuration in which the lower tumbler 32 is excluded and the rotor 20 having the second tumbler accommodation hole 26 for accommodating the upper tumbler 31 is provided.

  The number of tumblers 30 installed, the arrangement position, and the like can be arbitrarily set, and are not limited to the illustrated example. The number and arrangement positions of the first and second engaging protrusions 36 a and 36 b of the tumbler 30 are appropriately determined according to the shape and the number of steps of the inner groove 43 of the single groove key 40.

  In each of the above-described embodiments, the cylinder lock 10 that locks and unlocks the vehicle door by mechanical operation is illustrated, but the present invention is not limited to this. For example, a door of a house, other doors, etc. Of course, it can be applied to a cylinder lock.

  As is clear from the above description, typical embodiments, modifications, and illustrated examples of the present invention have been illustrated. However, the above-described embodiments, modifications, and illustrated examples limit the invention according to the claims. Not what you want. Therefore, it should be noted that not all the combinations of features described in the above-described embodiments, modifications, and illustrated examples are essential to the means for solving the problems of the invention.

DESCRIPTION OF SYMBOLS 1 ... Coupling device, 2 ... Holder, 3 ... Lever, 10 ... Cylinder lock, 11 ... Key cylinder, 11a ... Engagement hole, 12 ... Rotor case, 13 ... Mounting cover, 20 ... Rotor, 21 ... Key insertion hole, 22 ... Front end portion, 23 ... Rear end portion, 24 ... Tumbler accommodating hole, 24a ... Spring accommodating hole, 25 ... First tumbler accommodating hole, 26 ... Second tumbler accommodating hole, 27 ... Coil spring, 30 ... Tumbler, 31 , 31a to 31d ... upper tumbler, 32, 32a to 32d ... lower tumbler, 33 ... tumbler hole, 33a ... first opposing inner surface, 33b ... second opposing inner surface, 34 ... projecting end portion, 35 ... spring receiving portion, 36a ... 1st engagement protrusion, 36b ... 2nd engagement protrusion, 37a ... 1st positioning protrusion, 37b ... 2nd positioning protrusion, 40 ... Single groove key, 41 ... Gripping part, 42 ... Key plate, 43 ... inner groove, 44 ... first inner , 44 a to 44 d ... first engaging portion, 45 ... second inner surface, 45a to 45d: second engagement _{portion, P 1 ~P 8, P 11} , P 21, P 31, P 41, P 51 , P ₆₁ , P ₇₁ , P ₈₁ ... position, X ... central axis

Claims (3)

A cylinder lock that is locked and unlocked by a single groove key in which an inner groove that is vertically asymmetric in the key width direction is formed only on one side of the key plate,
A cylindrical rotor case;
A rotor that is rotatably accommodated in the rotor case, and has a key insertion hole formed in a rotation axis direction, and a plurality of tumbler accommodation holes formed in a direction communicating with and intersecting the key insertion hole;
A plurality of tumblers having a tumbler hole that is movably accommodated in the tumbler accommodation hole via a spring member and communicates with the key insertion hole;
With
The tumbler hole includes a first engagement protrusion that can be engaged with the inner groove, and a second engagement protrusion that can be engaged with the inner groove with the side surface of the key plate turned upside down. A cylinder lock characterized by comprising:   The tumbler housing hole resists a biasing force in a direction opposite to a biasing force of the spring member, and a first tumbler housing hole that movably accommodates the tumbler against the biasing force of the spring member. The cylinder lock according to claim 1, further comprising a second tumbler accommodating hole that is movably accommodated. The tumbler hole has a first opposed inner surface that faces one side surface of the key plate and a second opposed inner surface that faces the other side surface of the key plate,
On the first opposing inner surface, the first engaging protrusion protrudes and is formed.
3. The cylinder lock according to claim 1, wherein the second engaging protrusion protrudes from the second opposing inner surface. 4.

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