JP6185258B2 - Cylinder lock structure - Google Patents

Description

  The present invention relates to a structure of a cylinder lock.

To make it possible to use only another dedicated key in a cylinder lock that is locked and unlocked using a dedicated key, that is, to switch from the original dedicated key to another dedicated key, Driver pins must be incorporated and cannot be easily changed. In addition, if the occupant is replaced every time the cylinder lock is changed completely, a great expense must be borne. In view of this, there has been proposed a cylinder lock in which the dedicated key can be changed at low cost and with an easy change operation without replacing the entire cylinder lock (see, for example, Patent Documents 1, 2, and 3).
For example, the cylinder lock disclosed in Patent Document 1 has a locking bar that enters the groove of the outer cylinder and prevents rotation of the inner cylinder, and a locking bar that is provided in the inner cylinder and can be retracted into the bar receiving groove by a bar entry recess. A tumbler is provided. The tumbler consists of a first tumbler and a second tumbler. The first tumbler and the second tumbler can be selectively connected at different positions and can be disconnected by moving the locking bar. Thus, the first and second tumblers can be recombined, and the key difference can be changed. This cylinder lock includes a change key that allows the inner cylinder to rotate within a predetermined rotation angle range, and a neutral key that regulates the position of the second tumbler in the sliding direction and initializes the position of the first tumbler.

JP 2006-328854 A JP 2006-348657 A JP 2011-74613 A

  However, the above-described conventional cylinder lock has a neutral key that is a so-called change key, and resets the state of the first key, which is a dedicated key currently in operation, by using the neutral key, and then removes it to another dedicated key. Change, that is, change by inserting the second key. That is, it is necessary to have a reset key corresponding to the key in operation. The presence of such a neutral key may cause inconvenience in management such as loss or increase in the number of keys.

  The present invention has been made in view of the above situation, and the purpose of the present invention is not to require a separate key such as a neutral key for the cylinder lock operated by the first key, which is the original dedicated key, and another dedicated key. It is possible to change the key just by using the second key, that is, the cylinder lock structure that can be operated only with the new dedicated key only by operating with another new dedicated key. It is to provide.

Next, means for solving the above problems will be described with reference to the drawings corresponding to the embodiments.
The structure of the cylinder lock 11 according to claim 1 of the present invention includes an inner cylinder 23 having a keyhole 37 and rotatably accommodated inside the outer cylinder 21;
The inner cylinder 23 protrudes from the inner cylinder 23 and enters the lock groove 41 of the outer cylinder 21 to prevent the inner cylinder 23 from rotating and allows the inner cylinder 23 to rotate by allowing the inner cylinder 23 to move backward. A locking bar 25 to
A tumbler-side bar entry recess 51 is disposed at a position that allows the locking bar 25 to be retracted toward the inner cylinder 23 by using a key that is movably provided in the inner cylinder 23 and inserted into the key hole 37, and has one end. A variable tumbler 27 provided with a switching groove 57 that is drilled with one end-side recess 59 and the other-end-side recess 61 recessed in the side and the other end side ;
A variable pin 69 that engages with the switching groove 57 protrudes and is relatively movable in the same direction as the movement direction of the variable tumbler 27 and moves only in one direction with respect to the variable tumbler 27. is freely, the locking by use of the switching groove 57 and the variable pin 69 and engaging the variable tumbler relatively immovable become engaged position stepwise a plurality of relative 27 by the, different key from said key A variable tip 29 comprising a tip side bar entry recess 65 that disables bar entry of the tumbler side bar entry recess 51 that allowed entry of the bar 25 and allows bar entry at different positions;
It is characterized by comprising.

  In the structure of the cylinder lock 11, in a state where the key (first key 13) is inserted, the locking bar 25 and the bar entry recess 67 coincide with each other, and the backward movement of the locking bar 25 to the inner cylinder 23 is allowed. . Here, the bar entry recess 67 has a predetermined recess width by overlapping the tumbler side bar entry recess 51 and the chip side bar entry recess 65. When a key (second key 15) different from this key is inserted in the operating state of this key (first key 13), the bar entry recess 67 does not fit the locking bar 25. When the second key 15 is used in this state, the tip side bar entry recess 65 is moved together with the variable tip 29, the engagement position between the switching groove 57 and the variable pin 69 is changed, and the predetermined recess width of the bar entry recess 67 is increased. change. That is, the cylinder lock 11 is in an operation state of another key (second key 15). When the other key (second key 15) is used, even if the original key (first key 13) is inserted, the changed bar entry recess 67 does not match, and the locking / unlocking operation becomes impossible.

The structure of the cylinder lock according to claim 2 of the present invention is the structure of the cylinder lock 11 (71) according to claim 1,
The switching groove 57 (81) is formed in a substantially heft shape having a recess 59 on one end and a recess 61 on the other end,
The variable chip 29 (75) has the variable pin 69 disposed in the one end side recess 59 or the other end side recess 61 of the switching groove 57 (81), so that the variable chip 29 (75) is located with respect to the variable tumbler 27 (73). It is characterized by being switched to two positions step by step.

  In the structure of the cylinder lock 11, when the variable tip 29 (75) is moved by the pressing of the locking bar 25, the variable pin 69 of the variable tip 29 (75) has a substantially hex shape in the variable tumbler 27 (73). It moves from the one end side recess 59 to the other end side recess 61 along the switching groove 57 (81). That is, the variable chip 29 (75) is switched to the two positions. As a result, the tip-side bar entry recess 65 is moved relative to the tumbler-side bar entry recess 51, and the bar entry recess 67 is separated from the predetermined recess width that allows the locking bar 25 to retract when the key (first key 13) is inserted. When the key (second key 15) is inserted, the width is changed to a different predetermined recess width that allows the locking bar 25 to retract.

The structure of the cylinder lock 11 according to claim 3 of the present invention is the structure of the cylinder lock 11 according to claim 2,
The inner cylinder 23 is provided with a variable partition plate 31 that is pressed by the retraction of the locking bar 25 toward the inner cylinder 23 and moved radially inward,
The variable chip 29 is urged by the tumbler urging spring 63 on the variable partition plate 31,
The variable tip 29 is moved together with the variable partition plate 31 by the retraction of the locking bar 25, and the variable pin 69 of the variable tip 29 is depressed at one end of the switching groove 57 by the biasing force of the tumbler biasing spring 63. The variable tip 29 is moved with respect to the variable tumbler 27 by being moved from the other end side recess 61 to the variable tumbler 27 .

  In this structure of the cylinder lock 11, when another key (second key 15) starts to rotate, the locking bar 25 pushes the variable tip 29 and the variable partition plate 31 inward in the radial direction. At this time, the variable tumbler 27 is held with respect to the variable partition plate 31 in a position where the tumbler side bar entry recess 51 allows the locking bar 25. Further, the variable pin 69 of the variable chip 29 is moved in the back direction through the substantially groove-shaped (preferably U-shaped) switching groove 57 of the variable tumbler 27. Immediately after returning the rotation of the second key 15, the variable pin 69 of the variable tip 29 is moved from the one end side recess 59 of the switching groove 57 to the other end side recess 61 by the tumbler biasing spring 63. As a result, the tip side bar entry recess 65 is moved, and the position of the bar entry recess 67 changes. When the position of the variable partition plate 31 returns, the variable pin 69 engages with the U-shaped other-end recess 61 of the switching groove 57 and is held at that position. After removal of another key (second key 15), the cylinder lock 11 is in an operational state of another key (second key 15), and the original key (first key 13) becomes unusable.

The structure of the cylinder lock 71 according to claim 4 of the present invention is the structure of the cylinder lock 11 according to claim 2,
By engaging the switching center shaft 77 and the sliding long hole 79, the variable tip 75 is provided so as to swing with respect to the variable tumbler 73 and move in the longitudinal direction of the sliding long hole 79.
Between the inner cylinder 23 and the variable tip 75, there is provided a tumbler biasing spring 63 for biasing the variable tip 75 in the longitudinal direction of the sliding long hole 79,
Wherein the variable chip 75 by retraction of the locking bar 25 is pressed, one side concave portion 59 of the variable tip 75 variable pin 69 to by the biasing force of the tumbler biasing spring 63 of shape of the switching groove 81 The variable tip 75 moves relative to the variable tumbler 73 by being moved from the other end side recess 61 to the variable tumbler 73 .

  In this structure of the cylinder lock 71, when another key (second key 15) starts to rotate, the locking bar 25 lifts the variable tip 75 and swings about the switching center shaft 77. At the same time, the variable tip 75 is moved by the biasing force of the tumbler biasing spring 63 by sliding the sliding slot 79 with respect to the switching center shaft 77. At this time, the variable tumbler 73 is held with respect to the variable partition plate 31 in a position where the tumbler side bar entry recess 51 allows the locking bar 25. As a result of this movement, the variable pin 69 of the variable chip 75 is moved in the back direction through the switching groove 81 of the variable tumbler 73. Immediately after returning the rotation of another key (second key 15), the variable pin 69 of the variable tip 75 is moved to the recess 61 on the other end side of the switching groove 81 by the tumbler biasing spring 63 and held in that position. . As a result, the chip-side bar entry recess 65 is moved, the position of the bar entry recess 67 is changed, and the cylinder lock 71 is in the operating state of the second key 15.

  According to the structure of the cylinder lock according to claim 1 of the present invention, a separate key such as a neutral key is not required for the cylinder lock that is operated with a key (first key) that is initially used, and another new key is provided. You can change the key just by using the (second key). Also, after using this new different key (second key), it becomes impossible to use the original key (first key).

  According to the structure of the cylinder lock described in claim 2 according to the present invention, the variable tip is arranged in the first end recess or the other end recess of the switching groove, so that the variable tip can be replaced with the original by a simple structure. Two positions can be irreversibly switched from the usable position of the key (first key) to the usable position of another new key (second key).

  According to the structure of the cylinder lock of the third aspect of the present invention, the variable partition plate is moved using the locking bar that is retracted by the rotation of the inner cylinder, and the variable pin is moved to the U-shape by the movement of the variable partition plate. It is possible to move from the one end side recess of the switching groove to the other end side recess, and to switch the variable tip with respect to the variable tumbler at two positions with a reliable irreversible structure, thereby improving the crime prevention property.

  According to the structure of the cylinder lock of the fourth aspect of the present invention, the variable tip is oscillated using the locking bar that is retracted by the rotation of the inner cylinder, and is variable by the tumbler biasing spring and the sliding long hole. By moving the pin from one recess to the other recess in the switching groove, the variable chip can be irreversibly switched to two positions with a small number of parts, making the product compact and inexpensive. Can be configured.

It is sectional drawing showing the structure of the cylinder lock which concerns on 1st Embodiment of this invention. It is a disassembled front view of the cylinder lock shown in FIG. (A) is sectional drawing of the cylinder lock which concerns on 1st Embodiment at the time of a 1st key operation | movement, (b) is a principal part disassembled front view of (a). (A) is sectional drawing of the cylinder lock which concerns on 1st Embodiment at the time of second key insertion, (b) is a principal part exploded front view of (a). (A) is sectional drawing of the cylinder lock which concerns on 1st Embodiment at the time of second key rotation, (b) is a principal part exploded front view of (a). (A) is sectional drawing of the cylinder lock which concerns on 1st Embodiment with which rotation of the second key was returned, (b) is a principal part disassembled front view of (a). (A) is sectional drawing of the cylinder lock which concerns on 1st Embodiment after completion of a switch to a 2nd key, (b) is a principal part disassembled front view of (a). (A) is sectional drawing of the cylinder lock which concerns on 1st Embodiment in the state from which the second key was extracted, (b) is a principal part disassembled front view of (a). (A) is sectional drawing of the cylinder lock which concerns on 1st Embodiment in the state in which the first key was used at the time of 2nd key operation, (b) is a principal part exploded front view of (a). It is sectional drawing of the cylinder lock which concerns on 1st Embodiment of the state in which the master key was inserted at the time of 1st key operation. It is sectional drawing of the cylinder lock which concerns on 1st Embodiment of the state in which the master key was inserted at the time of 2nd key operation. It is sectional drawing showing the structure of the cylinder lock which concerns on 2nd Embodiment of this invention. It is a disassembled front view of the cylinder lock shown in FIG. (A) is an enlarged front view of the variable tumbler shown in FIG. 13, (b) is a plan view of (a), (c) is an enlarged front view of the variable chip shown in FIG. 13, and (d) is (c). FIG. (A) is sectional drawing of the cylinder lock which concerns on 2nd Embodiment at the time of first key operation, (b) is a principal part exploded front view of (a). (A) is sectional drawing of the cylinder lock which concerns on 2nd Embodiment at the time of second key insertion, (b) is a principal part exploded front view of (a). (A) is sectional drawing of the cylinder lock which concerns on 2nd Embodiment at the time of second key rotation, (b) is a principal part exploded front view of (a). (A) is sectional drawing of the cylinder lock which concerns on 2nd Embodiment in which rotation of the second key was returned, (b) is a principal part exploded front view of (a). (A) is sectional drawing of the cylinder lock which concerns on 2nd Embodiment after completion of switching to a 2nd key, (b) is a principal part disassembled front view of (a). (A) is sectional drawing of the cylinder lock which concerns on 2nd Embodiment of the state from which the second key was extracted, (b) is a principal part disassembled front view of (a). (A) is sectional drawing of the cylinder lock which concerns on 2nd Embodiment of the state in which the first key was used at the time of 2nd key operation, (b) is a principal part exploded front view of (a). It is sectional drawing of the cylinder lock which concerns on 2nd Embodiment of the state in which the master key was inserted at the time of 1st key operation. It is sectional drawing of the cylinder lock which concerns on 2nd Embodiment of the state in which the master key was inserted at the time of 2nd key operation | movement.

Embodiments according to the present invention will be described below with reference to the drawings.
FIG. 1 is a sectional view showing the structure of the cylinder lock according to the first embodiment of the present invention, and FIG. 2 is an exploded front view of the cylinder lock shown in FIG.
The structure of this cylinder lock is applied to the cylinder lock 11 shown in FIG. Note that the mechanism of the upper half in FIG. The cylinder lock 11 has the function of the present invention by having at least one mechanism on the upper and lower sides. The number of key differences can be increased by providing upper and lower mechanisms. Moreover, the mechanism on one half may be considered as an option.

  For the cylinder lock 11, a first key 13 that is an initially used key, a second key 15 that is another newly used key, and a master key 17 are used. The first key 13, the second key 15, and the master key 17 have key notches 19 having different step depths. The cylinder lock 11 includes an outer cylinder 21, an inner cylinder 23, a locking bar 25, a variable tumbler 27, a variable tip 29, and a variable partition plate 31.

  A pair of left and right support columns 33 and a pair of upper and lower guide shafts 35 are fixed inside the outer cylinder 21, and the support columns 33 and the guide shafts 35 extend in a direction along the axis of the outer cylinder 21, and each is a keyhole 37. Between the two. An inner cylinder 23 is rotatably accommodated inside the outer cylinder 21, and the inner cylinder 23 has a keyhole 37. A bar accommodating groove 39 is formed in the inner cylinder 23, and the locking bar 25 is energized and accommodated radially outward by a bar energizing spring (not shown). The locking bar 25 protrudes from the inner cylinder 23 and enters the lock groove 41 of the outer cylinder 21 to prevent the inner cylinder 23 from rotating, and allows the inner cylinder 23 to rotate by allowing the inner cylinder 23 to move backward. To.

  A variable partition plate 31 is provided in the inner cylinder 23 so as to be movable in the radial direction. The variable partition plate 31 is pressed by the retraction of the locking bar 25 to the inner cylinder 23 and moved inward in the radial direction. The variable partition plate 31 is urged radially outward in the outer cylinder 21 by a pair of variable springs 43 provided on both sides in the diameter direction.

  A variable tumbler 27 is provided inside the outer cylinder 21 by engaging a guide hole 45 with the guide shaft 35. The variable tumbler 27 slides the guide hole 45 on the guide shaft 35 and follows the diameter of the outer cylinder 21. It is free to move in the direction. A key entry portion 47 is formed at the upper edge of the variable tumbler 27, and the key entry portion 47 surrounds a lower half portion that is a half portion of the key hole 37. An engagement shoulder portion 49 is formed in the key entry portion 47, and the engagement shoulder portion 49 can be changed to a predetermined position by a key notch 19 of the first key 13, the second key 15, and the master key 17 inserted into the key hole 37. The tumbler 27 is moved. A tumbler-side bar entry recess 51 is formed at the lower edge of the variable tumbler 27, and the tumbler-side bar entry recess 51 allows the locking bar 25 to retract toward the inner cylinder 23. That is, the variable tumbler 27 is movably provided in the inner cylinder 23, and the tumbler side bar entry recess 51 is moved backward to the inner cylinder 23 of the locking bar 25 by using a key (first key 13) inserted into the key hole 37. Place it in an allowable position.

  A regulation pin 53 projects from the front surface of the variable tumbler 27, and the regulation pin 53 engages with a regulation release groove 55 formed on the upper edge of the variable partition plate 31. The variable tumbler 27 is restricted from moving with respect to the variable partition plate 31 when the restriction pin 53 engages with the restriction release groove 55. The variable tumbler 27 is provided with a U-shaped switching groove 57, and the switching groove 57 has one end-side recess 59 and the other end-side recess 61 that are recessed on one end side and the other end side.

  A variable tip 29 is provided on the variable partition plate 31 by a tumbler biasing spring 63 so as to be biased in the same direction as the direction of movement of the variable tumbler 31 and so that the direction of movement of the variable tumbler 31 is one direction. ing. A chip side bar entry recess 65 is formed at the lower edge of the variable chip 29. Here, the tumbler side bar entry recess 51 is formed with a wide recess width, and the chip side bar entry recess 65 is formed with a narrow recess width. The tumbler-side bar entry recess 51 and the chip-side bar entry recess 65 are overlapped to form a bar entry recess 67 (see FIG. 1) having a predetermined recess width. Therefore, when the variable tip 29 is moved with respect to the variable tumbler 27, the recess width of the bar entry recess 67 is changed. That is, the acceptance / rejection of the locking bar 25 is changed.

  When the variable tip 29 is moved together with the variable partition plate 31 by the retraction of the locking bar 25, the biasing force of the tumbler biasing spring 63 causes the variable tumbler 27 to move from one end side to the other end side of the U-shaped switching groove 57. Moved. The variable chip 29 is switched and disposed at two positions with respect to the variable tumbler 27 by the variable pin 69 being disposed on and engaging with the U-shaped one end side or the other end side of the switching groove 57. The variable tip 29 can be moved relative to the variable tumbler 27 by engaging the switching groove 57 and the variable pin 69, and can be relatively moved by engaging the recess 59 on the one end or the recess 61 on the other end. The use of the second key 15 disables the bar entry of the tumbler-side bar entry recess 51 that has allowed the entry of the locking bar 25, and allows the bar entry at different positions.

Next, the effect | action of the structure of the cylinder lock 11 which has the said structure is demonstrated.
3A is a cross-sectional view of the cylinder lock 11 according to the first embodiment when the first key is operated, FIG. 3B is an exploded front view of the main part of FIG. 4A, and FIG. 4A is the first view when the second key is inserted. Sectional drawing of the cylinder lock 11 which concerns on 1 embodiment, (b) is a principal part exploded front view of (a), FIG.5 (a) is sectional drawing of the cylinder lock 11 which concerns on 1st Embodiment at the time of second key rotation, (B) is an exploded front view of the main part of (a), FIG. 6 (a) is a sectional view of the cylinder lock 11 according to the first embodiment in which the rotation of the second key 15 is returned, and (b) is a sectional view of (a). 7A is a cross-sectional view of the cylinder lock 11 according to the first embodiment after completion of switching to the second key 15, and FIG. 7B is an exploded front view of the main part of FIG. a) is a sectional view of the cylinder lock 11 according to the first embodiment with the second key 15 removed, and FIG. 9A is a cross-sectional view of the cylinder lock 11 according to the first embodiment in a state where the first key 13 is used during second key operation, and FIG. 9B is an exploded front view of the main part of FIG. FIG. 10 is a cross-sectional view of the cylinder lock 11 according to the first embodiment in a state where the master key 17 is inserted during the first key operation, and FIG. 11 is a first embodiment in which the master key 17 is inserted during the second key operation. It is sectional drawing of the cylinder lock 11 which concerns on a form.
In the structure of the cylinder lock 11, in a state where the first key 13 shown in FIG. 3 is inserted, the locking bar 25 and the bar entry recess 67 coincide with each other, and the backward movement of the locking bar 25 to the inner cylinder 23 is allowed. Become.

  Here, the bar entry recess 67 has a predetermined recess width by overlapping a tumbler side bar entry recess 51 with a narrow recess width and a chip side bar entry recess 65 with a wide recess width. When the second key 15 is inserted as shown in FIG. 4 in the operating state of the first key 13, the bar entry recess 67 does not fit the locking bar 25. When the second key 15 starts to rotate in this state as shown in FIG. 5, the locking bar 25 is pushed inward in the radial direction so as to lift the variable tip 29 and the variable partition plate 31 against the variable spring 43. The variable tumbler 27 is not pushed in because its upper edge is in contact with the support column 33.

  In this case, the variable tumbler 27 is engaged with the restriction release groove 55 formed in the variable partition plate 31 with respect to the variable partition plate 31, and the tumbler side bar entry recess 51 allows the locking bar 25. Is held in the position to be. Further, the variable pin 69 of the variable chip 29 is moved through the switching groove 57 of the variable tumbler 27 in the back direction (movable position) which is diagonally upward left in FIG.

  As shown in FIG. 6, immediately after the rotation of the second key 15 is returned, the variable pin 69 of the variable tip 29 is moved from the one end side recess 59 to the other end side recess 61 of the switching groove 57 by the tumbler biasing spring 63. ing. As a result, the tip side bar entry recess 65 is moved, and the position of the bar entry recess 67 changes.

  As shown in FIG. 7, when the position of the variable partition plate 31 is returned by the biasing force of the variable spring 43, the variable pin 69 engages with the U-shaped recess 61 of the switching groove 57 and is held in that position. Is done. That is, the engagement position of the variable pin 69 with respect to the switching groove 57 is changed, and the state after switching is maintained without returning the engagement position. After the removal of the second key 15 shown in FIG. 8, the cylinder lock 11 is in the operating state of the second key 15.

  As shown in FIG. 9, when the second key 15 is operated, even if the first key 13 is inserted into the cylinder lock 11, the changed bar entry recess 67 does not match, and the first key 13 becomes unusable and can be locked and unlocked. Is impossible.

  Further, when the master key 17 is used, even if the master key 17 is inserted into the cylinder lock 11 being operated by the first key 13 as shown in FIG. 10, it is being operated by the second key 15 as shown in FIG. Even if the master key 17 is inserted into the cylinder lock 11, the width of the bar entry recess 67 is set so as to correspond to the first key 13, the second key 15, and the master key 17. Locking and unlocking is possible even in the state.

Next, the structure of the cylinder lock 71 according to the second embodiment of the present invention will be described.
12 is a cross-sectional view showing the structure of a cylinder lock 71 according to the second embodiment of the present invention, FIG. 13 is an exploded front view of the cylinder lock 71 shown in FIG. 12, and FIG. 14 (a) is a variable shown in FIG. An enlarged front view of the tumbler 73, (b) is a plan view of (a), (c) is an enlarged front view of the variable chip 75 shown in FIG. 13, and (d) is a plan view of (c). In addition, the same code | symbol is attached | subjected to the member and site | part equivalent to the member and site | part shown to FIGS. 1-11, and the overlapping description is abbreviate | omitted.
The structure of the cylinder lock 71 does not include the variable partition plate 31 described above. The variable chip 75 is provided directly on the variable tumbler 73. The variable tumbler 73 has a switching center shaft 77 protruding from the front. A tumbler biasing spring 63 that biases the variable tip 75 in the longitudinal direction of the sliding long hole 79 is provided between the inner cylinder 23 and the variable tip 75. The variable tip 75 is pushed up and rocked by the locking bar 25.

  As shown in FIG. 14, the variable tumbler 73 is formed with a hemi-shaped switching groove 81. On the other hand, the variable tip 75 is provided with a sliding long hole 79 that engages with the switching center shaft 77. The variable chip 75 is provided with a variable pin 69 that engages with the switching groove 81. That is, the variable tip 75 is supported so as to be swingable and slidable with respect to the switching center shaft 77, so that the variable pin 69 can move from the one end side recess 59 to the other end side recess 61 of the switching groove 81. It has become. The variable tip 75 pressed by the retraction of the locking bar 25 is moved from one end side to the other end side of the switching groove 81 having a letter shape with respect to the variable tumbler 73 by the biasing force of the tumbler biasing spring 63.

Next, the operation of the structure of the cylinder lock 71 according to the second embodiment will be described.
15A is a cross-sectional view of the cylinder lock 71 according to the second embodiment when the first key is operated, FIG. 15B is an exploded front view of the main part of FIG. 16A, and FIG. 16A is the first view when the second key is inserted. Sectional drawing of the cylinder lock 71 which concerns on 2 embodiment, (b) is a principal part exploded front view of (a), FIG.17 (a) is sectional drawing of the cylinder lock 71 which concerns on 2nd Embodiment at the time of 2nd key rotation, (B) is an exploded front view of the main part of (a), FIG. 18 (a) is a cross-sectional view of the cylinder lock 71 according to the second embodiment in which the rotation of the second key 15 is returned, and (b) of FIG. FIG. 19A is a sectional view of a cylinder lock 71 according to the second embodiment after completion of switching to the second key 15, and FIG. 19B is an exploded front view of the principal part of FIG. a) is a sectional view of a cylinder lock 71 according to the second embodiment with the second key 15 removed, ) Is an exploded front view of the main part of FIG. 21A, FIG. 21A is a cross-sectional view of the cylinder lock 71 according to the second embodiment in a state where the first key 13 is used during second key operation, and FIG. 22 is an exploded front view of the main part, FIG. 22 is a sectional view of the cylinder lock 71 according to the second embodiment in which the master key 17 is inserted when the first key is operated, and FIG. 23 is the master key 17 inserted when the second key is operated. It is sectional drawing of the cylinder lock 71 which concerns on 2nd Embodiment of the state.
In the structure of the cylinder lock 71, in a state where the first key 13 shown in FIG. 15 is inserted, the locking bar 25 and the bar entry recess 67 coincide with each other, and the backward movement of the locking bar 25 to the inner cylinder 23 is allowed. Become.

  When the second key 15 is inserted as shown in FIG. 16 in the operating state of the first key 13, the bar entry recess 67 interferes with the variable tip 75 and does not fit the locking bar 25. When the second key 15 starts to rotate in this state as shown in FIG. 17, the locking bar 25 lifts the variable tip 75 and swings about the switching center shaft 77. The variable chip 75 is not pushed in because its upper edge is in contact with the support pillar 33. At the same time, the variable tip 75 is moved by the biasing force of the tumbler biasing spring 63 by sliding the sliding slot 79 with respect to the switching center shaft 77.

  As shown in FIG. 18, immediately after the rotation of the second key 15 is returned, the variable pin 69 of the variable tip 75 is moved to the other end side of the switching groove 81 by the tumbler biasing spring 63. As a result, the tip side bar entry recess 65 is moved, and the position of the bar entry recess 67 changes.

  As shown in FIG. 19, when the movement of the variable tip 75 by the tumbler urging spring 63 is completed, the variable pin 69 engages with the other end of the switching groove 81 in the shape of a bar and is held at the engagement position. After the removal of the second key 15 shown in FIG. 20, the cylinder lock 71 is in the operating state of the second key 15.

  As shown in FIG. 21, even when the first key 13 is inserted into the cylinder lock 71 when the second key 15 is operated, the changed bar entry recess 67 does not match, and the locking / unlocking operation becomes impossible.

  Further, when the master key 17 is used, even if the master key 17 is inserted into the cylinder lock 71 being operated by the first key 13 as shown in FIG. 22, it is being operated by the second key 15 as shown in FIG. Even if the master key 17 is inserted into the cylinder lock 71, the width of the bar entry recess 67 is set to correspond to the first key 13, the second key 15, and the master key 17, respectively. Locking and unlocking is possible even in the state.

  According to the structure of the cylinder lock 71, the variable tip 75 is swung using the locking bar 25 that moves backward by the rotation of the inner cylinder 23, and the variable pin 69 is formed by the tumbler biasing spring 63 and the sliding long hole 79. The variable chip 75 can be irreversibly switched to a variable tumbler 73 with a small number of parts by moving from one end side to the other end side of the switch-shaped switching groove 57 with a small shape. it can.

  Therefore, according to the structure of the cylinder lock 11 and the cylinder lock 71 according to this embodiment, a separate key such as a neutral key is not required from the state in which the first key 13 is operated, and only the second key 15 is used. , You can make a key change.

11, 71 ... Cylinder lock 13 ... Key (initially used key, fast key)
15 ... Another key (newly used key, second key)
DESCRIPTION OF SYMBOLS 21 ... Outer cylinder 23 ... Inner cylinder 25 ... Rocking bar 27, 73 ... Variable tumbler 29, 75 ... Variable tip 31 ... Variable partition plate 37 ... Key hole 41 ... Lock groove 51 ... Tumbler side bar entrance recessed part 57, 81 ... Switching groove 59 ... one end side recess 61 ... other end side recess 63 ... tumbler biasing spring 65 ... tip side bar entry recess 69 ... variable pin 77 ... switching center shaft 79 ... sliding slot

Claims (4)

An inner cylinder having a keyhole and rotatably accommodated inside the outer cylinder;
A locking bar that protrudes from the inner cylinder and enters the lock groove of the outer cylinder to prevent the rotation of the inner cylinder and allows the inner cylinder to rotate by allowing the inner cylinder to be retracted;
A tumbler-side bar entry recess is arranged at a position that allows the locking bar to be retracted into the inner cylinder by using a key that is movably provided in the inner cylinder and inserted into the keyhole, and has one end side and the other end side. A variable tumbler provided with a switching groove that is drilled with one recess on the other end and a recess on the other end ;
A variable pin that engages with the switching groove protrudes and is relatively movable in the same direction as the movement direction of the variable tumbler, and is movable only in one direction with respect to the variable tumbler. the switching groove and stepwise a plurality of engagement positions to be immovable relative for the variable tumblers by the engagement between the variable pins, was allowed to enter the locking bar by the use of different keys between the key A variable tip comprising a tip side bar entry recess that disables bar entry of the tumbler side bar entry recess and allows bar entry at different positions;
The structure of the cylinder lock characterized by comprising. The cylinder lock structure according to claim 1,
The switching groove is formed in a substantially heft shape having a recess on one end and a recess on the other end,
In the variable chip, the variable pin is disposed in one position of the switching groove or the other end side of the switching groove so that the variable chip is switched in two positions with respect to the variable tumbler. Structure of cylinder locking. The cylinder lock structure according to claim 2,
The inner cylinder is provided with a variable partition plate that is pushed by retreating the locking bar to the inner cylinder and moved one inside in the radial direction,
The variable chip is provided with the variable chip biased by a tumbler biasing spring,
The variable tip moves together with the variable partition plate by retreating the locking bar, and the variable pin of the variable tip is moved from the recess on one end of the switching groove to the recess on the other end by the biasing force of the tumbler biasing spring. A structure of the cylinder lock , wherein the variable tip moves relative to the variable tumbler . The cylinder lock structure according to claim 2,
By engaging the switching center shaft and the sliding slot, the variable tip is provided so as to be swingable with respect to the variable tumbler and movable in the longitudinal direction of the sliding slot,
A tumbler biasing spring that biases the variable tip in the longitudinal direction of the sliding long hole is provided between the inner cylinder and the variable tip.
Wherein the retraction of the locking bar variable chip is pressed, the variable tip end side recess variable pin from one end recess of the switching groove into shaped by the biasing force of the tumbler biasing spring The structure of the cylinder lock , wherein the variable tip is moved with respect to the variable tumbler .

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