JP4282422B2 - Cylinder lock - Google Patents

Description

  In the present invention, a rotor that can be rotated around an axis along the key insertion / removal direction in a state where a substantially plate-like key is inserted into a key insertion hole is rotatably supported in an outer cylinder case. The rotor is provided with a plurality of sliding guide grooves along the radial direction in a state of being arranged at intervals in the axial direction of the rotor, and is slidable in the radial direction in the plurality of sliding guide grooves. And a plurality of lock plates are separately housed in a state of being urged and urged radially outward by the urging means, and the rotor is in a rotational phase for key insertion / removal with respect to the outer cylinder case. In a state where the key is removed from the key insertion hole, the plurality of lock plates are formed on the inner peripheral surface of the outer cylinder case by the moving urging force of the urging means. Rotation restricted state where the rotation of the rotor is restricted by fitting and engaging with the recess. In a state where the rotor is in the rotation phase for inserting / removing the key and the key is inserted into the key insertion hole, the plurality of lock plates are engaged with the engagement recesses by engaging with the key. The present invention relates to a cylinder lock that is configured to be in a rotation-permitted state in which the rotation is permitted and the rotation operation of the rotor is permitted.

  The cylinder lock having the above-described configuration includes, for example, an ON position in which the rotor is rotated by a set amount from the rotation phase for inserting and removing the key by rotating the key inserted into the key insertion hole, and the ON position thereof. When the operator releases the key rotation operation while rotating the rotor to the start position, the rotor can be operated to rotate at each of the start positions for starting the engine further rotated by a set amount from the position. Is configured to be urged to rotate back so as to automatically return to the ON position, and is used for various purposes such as for engine operation.

  In the above-described cylinder lock used for engine operation, conventionally, a groove for releasing the plate is formed at a position corresponding to the lock plate on the inner peripheral surface of the outer cylinder case that rotatably supports the rotor. There was a thing (for example, refer to patent documents 1).

  For example, when the key with fine foreign matter such as sand particles attached is inserted into the key insertion hole and the foreign matter enters between the key and the rotor, the lock plate is rotated. In some cases, the lock plate may be slightly protruded outward without being completely switched to the permitted movement state, and the lock plate may come into contact with the inner peripheral surface of the outer cylinder case to become a resistance. At that time, when the rotor is rotated to the start position, it can be manually rotated. However, even if the operation is canceled at the start position, the return urging force as described above automatically causes the rotor to reach the on position. In such a case, even if the lock plate protrudes slightly outward, the rotor is turned on so that it does not become a resistance when the rotor is rotated by the escape groove. It can be returned to the position.

Japanese Utility Model Publication No. 5-6153

  In the above-described conventional configuration, a groove portion for escaping the plate is formed in the outer cylinder case so that the rotation of the rotor is not hindered due to the entry of foreign matter such as sand particles between the key and the rotor. However, according to this configuration, it is possible to automatically return from the start position where the rotor is turned after the key is inserted to the on position, but there is still room for improvement in the following aspects.

  In other words, in the above-described conventional configuration, when a key is inserted into the key insertion hole with foreign matter attached as described above, the key is pulled out to the outer side with the foreign matter attached, and there is a problem. However, after the key is inserted into the key insertion hole, foreign matter enters between the lock plate and the inner surface of the sliding guide groove formed on the rotor, and hinders the movement of the lock plate inside the sliding guide groove. May be in a state. That is, after the key is pulled out and released, the lock plate protrudes radially outward by the urging force of the urging means, and engages and engages with the engagement recess. In some cases, the foreign substance is caught between the two and the movement of the lock plate is hindered.

  If the lock plate is fitted and engaged with the engagement recess in this manner and the movement is hindered, the lock plate moves as described above even if the key is inserted into the key insertion hole. As a result, the key cannot be inserted, and even if it can be inserted, there is a possibility that the rotor cannot be rotated well.

  The purpose of the present invention is to prevent obstruction of the movement of the lock plate due to the biting of foreign matter, even when the key with foreign matter attached is inserted into the key insertion hole, The object is to provide a cylinder lock capable of maintaining a state in which a rotation operation by a key can be favorably performed.

The cylinder lock according to the present invention has a rotor that can be rotated around an axis along the key insertion / removal direction in a state where a substantially plate-like key is inserted into the key insertion hole. It is provided in a state where it is fitted and supported,
The rotor is formed with a plurality of sliding guide grooves along the radial direction in a state of being arranged at intervals in the axial direction, and is slidable in the radial direction in the plurality of sliding guide grooves and biasing means A plurality of lock plates are separately stored in a state of being projected and urged radially outward at
The plurality of lock plates are moved by the urging means in a state where the rotor is in a rotation phase for inserting / removing a key with respect to the outer cylinder case and the key is removed from the key insertion hole. It becomes a rotation restricting state in which a plurality of engaging recesses formed on the inner peripheral surface of the outer cylinder case are fitted and engaged by the urging force to restrict the rotation of the rotor,
In a state where the rotor is in the rotation phase for inserting / removing the key and the key is inserted into the key insertion hole, the plurality of lock plates are engaged with the engagement recesses by engaging with the key. The first feature configuration is configured so as to be in a rotation-permitted state in which the rotation is permitted and the rotation operation of the rotor is permitted.
In the rotor, a position corresponding to an inter-groove portion between adjacent slide guide grooves among the plurality of slide guide grooves, or an end located at an end portion in the alignment direction among the plurality of slide guide grooves. The part corresponding to the groove outer part located outside in the arrangement direction of the part side sliding guide grooves, and the part located on the outer side in the longitudinal direction of the key insertion hole as seen in the axial direction In addition, a foreign material escape groove wider than the plate thickness of the key is formed in a state where the key insertion hole and the sliding guide groove communicate with each other and are opened outward in the radial direction of the rotor .
The rotation phase for inserting and removing the key of the rotor is set so that the longitudinal direction intersecting the key plate thickness direction in the key insertion hole is directed in the vertical direction,
When the rotor is in the rotation phase for key insertion / removal, the foreign object escape groove is formed at a position located below the key insertion hole .

  That is, for example, when a key is inserted into the key insertion hole in a state where foreign matters such as sand particles are attached, each of the keys is engaged with and engaged with an engagement recess formed on the inner peripheral surface of the outer cylinder case by the biasing means. The key to be inserted is engaged with the lock plate, and the engagement with the engagement recess of each lock plate is released to allow the rotation operation of the rotor to be allowed. At that time, even during or after the key is inserted, even if a foreign object attached to the key leaves the key and tries to enter the gap between the lock plate and the inner surface of the sliding guide groove, As described above, since the foreign substance escape groove is formed, it is possible to prevent the foreign substance from entering into the narrow gap between the lock plate and the inner surface of the sliding guide groove and becoming in a state of being caught. is there.

  In other words, the substantially plate-like key is formed with concavo-convex portions for engagement with the lock plates and moving in the rotor radial direction at the edge portions on both sides. In many cases, the foreign matter is stuck in and attached to the groove portion of the uneven portion. And even if the foreign matter stuck in and attached to the concave groove portion of such a key is separated from the key, it is released to the foreign matter relief groove formed in a state where it is opened outward in the radial direction of the rotor as described above. This makes it possible to avoid biting between the lock plate and the inner surface of the sliding guide groove.

  By the way, this foreign matter escape groove is not in a state of opening outward in the radial direction of the rotor, but, for example, as shown in FIG. 12, the foreign matter escape groove 14a is inserted into the rotor 2 in the axial direction. However, in this configuration, there is a disadvantage that foreign matter does not stay in the foreign matter escape groove and is likely to be intruded between the lock plate and the inner surface of the sliding guide hole. By adopting a configuration in which the escape groove is opened radially outward of the rotor, grease or the like injected to smoothly rotate the rotor between the inner peripheral surface of the outer cylinder case and the outer peripheral surface of the rotor. The foreign matter can be adhered to the inner surface of the foreign matter escape groove by the oil, and the inconvenience due to the biting as described above can be easily avoided for a long time. Incidentally, foreign matters such as sand grains are very small diameter particles, for example, about 0.01 mm in size, and even if foreign matter is adhered to the inner surface of the foreign matter escape groove, there is no problem in the operation of the cylinder lock.

Therefore, even if it is inserted into the key insertion hole with foreign matter attached to the key, the movement of the lock plate due to the biting of foreign matter is prevented in advance, and the rotation by the key is prevented. The cylinder lock which can maintain the state which can be operated satisfactorily can be provided.
In addition, the foreign matter attached to the key is separated from the key when the key is inserted and removed, and the foreign matter that is separated from the key tries to move downward due to its own weight, but the rotor is used for key insertion and removal. Since the foreign material escape groove is formed at a position located below the key insertion hole when in the rotation phase, the foreign material that moves away from the key due to its own weight is accurately guided to the foreign material escape groove. Thus, it is possible to avoid being caught between the lock plate and the inner surface of the sliding guide groove.

  According to a second feature configuration of the present invention, in addition to the first feature configuration, the foreign object escape groove is formed in the rotor in a state where the foreign object escape groove is continuous over all of the plurality of slide guide grooves along the arrangement direction. There is in point.

  That is, since the foreign substance escape groove is formed in a state of being continuous over all of the plurality of slide guide grooves, the lock plate and the slide guide groove are formed at all the inter-groove portions located between all the slide guide grooves. It is possible to avoid the foreign object from being caught between the inner surfaces, and it is easier to avoid the movement of each of the plurality of lock plates being hindered by the foreign object.

  According to a third characteristic configuration of the present invention, in addition to the second characteristic configuration, the foreign substance escape groove is provided at each of the end sliding guide grooves positioned at both ends in the arrangement direction of the plurality of sliding guide grooves. It exists in the point currently formed in the said rotor in the state which continues to the said groove outer part.

  That is, since the foreign substance escape groove is formed not only in all the inter-groove portions but also in a state of being connected to the outer portion of each of the end sliding guide grooves located at both ends in the arrangement direction, the arrangement direction It is possible to prevent foreign matter from being caught not only in the sliding guide groove located in the middle of the lock plate but also in the lock plate accommodated in the end sliding guide groove, and foreign matter is caught in all of the lock plates. This makes it possible to further prevent the movement from being hindered.

Hereinafter, a case where an embodiment of a cylinder lock according to the present invention is applied to an apparatus for starting an engine of an automobile will be described with reference to the drawings.
As shown in FIGS. 8, 9, and 10, the cylinder lock according to the present invention rotates around the axis along the key insertion / removal direction with the substantially plate-like key K inserted in the key insertion hole 1. An operable rotor 2 is provided in a state of being rotatably fitted in and supported by an outer cylinder case 3, and the rotor 2 includes a plurality of radial lines in a state of being arranged at intervals in the axial direction. A plurality of sliding guide grooves 4 are formed, and a plurality of sliding guide grooves 4 are slidable in the radial direction and are urged to protrude radially outward by a coil spring 5 as an urging means. Lock plates 6 are stored separately.

  In a state where the rotor 2 is in a rotational phase for key insertion / removal with respect to the outer cylinder case 3 and the key K is extracted and removed from the key insertion hole 1, a plurality of lock plates 6 are provided. The rotor 2 is in a rotation restricting state in which the rotation of the rotor 2 is restricted by engaging and engaging with a plurality of engaging recesses 7 formed on the inner peripheral surface of the outer cylinder case 3 by the moving urging force of the coil spring 5. When the key K is inserted into the key insertion hole 1 and the lock plate 6 is engaged with the key K, the engagement with the engagement recess 7 is released. Thus, the rotor 2 is configured to be allowed to rotate.

  More specifically, as shown in FIGS. 1 to 7, the rotor 2 is formed in a substantially cylindrical shape, and a key insertion hole 1 into which a key is inserted along the axial direction is formed in the center portion thereof. . The key insertion hole 1 is formed so that its cross-sectional shape is bent into a substantially waveform according to the shape of the key K. FIG. 11 shows a key K used for this cylinder lock. The key K is composed of a wide plate-like operation part k1 for an operator to operate with his / her hand, and a substantially strip-like insertion operation part k2 connected to the plate-like operation part k1, and is substantially plate-like as a whole. Configured. The insertion action portion k1 is formed with concavo-convex portions k3 for engaging with the lock plates 6 and moving the lock plates 6 in the radial direction at the left and right edge portions of the plate surface.

  A plurality of, specifically eight, sliding guide grooves 4 along the radial direction are formed in an intermediate portion in the axial direction of the rotor 2 in a state of being arranged with a gap in the axial direction. As shown in FIGS. 1 and 2, the sliding guide groove 4 is formed in a state in which the cross-sectional shape is an elongated quadrangular shape and penetrates along the radial direction of the rotor 2 at an appropriate interval in the axial direction of the rotor 2. A spring housing groove 8 having a substantially circular cross section is formed along the sliding guide groove 4 at one side in the radial direction of each sliding guide groove 4. In each sliding guide groove 4, a lock plate 6 formed in a substantially plate shape is housed separately in a movable state while sliding along the penetration direction of the sliding guide groove 4, that is, the radial direction of the rotor 2. It is the composition which becomes.

  As shown in FIGS. 5 and 6, each of the spring housing grooves 8 does not penetrate the rotor 2 along the radial direction of the rotor 2, but one end side is opened in the radial direction. The side is closed in a state in which a spring seat 9 for receiving and supporting the coil spring 5 is formed, and every other one of the plurality of sliding guide grooves 4 is opened in the opposite direction to one end side in the opposite direction. It is comprised so that it may become a shape. 9 and 10 show longitudinal sectional views of the cylinder lock as viewed in the axial direction. As shown in FIGS. 9 and 10, the spring housing groove 8 houses the coil spring 5. The coil spring 5 is engaged with an engaging portion 10 formed protruding from one side of the lock plate 6 so as to protrude and urge the lock plate 6 radially outward. . That is, the plurality of lock plates 6 arranged in the axial direction are configured to be urged to move in a state in which every other lock plate 6 protrudes outward in opposite directions.

  And the inner peripheral part of the outer cylinder case 3 which supports the rotor 2 so that the rotor 2 can be rotatably fitted corresponds to a position where the lock plate 6 protrudes in a state where the rotor 2 is in a rotational phase for key insertion / removal. An engagement concave portion 7 into which the lock plate 6 is fitted and engaged is formed at a location. Therefore, when the rotor 2 is in the rotation phase for inserting / removing the key and the key K is not inserted, the lock plates 6 are fitted into the engaging recesses 7 by the spring biasing force of the coil spring 5. Accordingly, the rotation of the rotor 2 is restricted (see FIGS. 9B and 10B). This state corresponds to the rotation restriction state.

  Each lock plate 6 is formed with a key passage hole 11 that allows the key K to be inserted and engages with the concavo-convex portion k3 of the key K to be inserted. Is formed in accordance with the shape of the uneven portion k3 of the key K. In other words, when the key K is inserted from the key insertion hole 1 to the proper insertion position, the concave and convex portion k3 of the key K comes into contact with and engages with the inner edge 11a of each key passage hole 11 of each lock plate 6, thereby locking the lock plate. 6 is moved inward in the axial direction against the spring force of the coil spring 5, and each lock plate 6 is disengaged from the engagement recess 7. Then, since there is nothing that restricts the rotation, the rotor 2 is in a rotatable state (see FIGS. 9 (A) and 10 (A)). This state corresponds to the rotation allowable state.

  When the key K inserted from the lock position A corresponding to the rotation phase for inserting / removing the key is operated to rotate around the axis, the on position B for supplying electric power to each electrical component is further rotated. The rotor 2 can be rotated to the start position C where the engine is started (see FIG. 2).

  And in this cylinder lock, the location corresponding to the part 12 between the groove | channels between the adjacent slide guide grooves 4 among the some slide guide grooves 4 in the said rotor 2, and the said some slide guide Of the grooves 4, the end side sliding guide grooves 4 a located at the end portions in the alignment direction are locations corresponding to the groove outer portions 13 positioned outward in the alignment direction, and as viewed in the axial direction The thickness of the key K is such that the key insertion hole 1 and the sliding guide groove 4 communicate with the key insertion hole 1 at the outer side in the longitudinal direction and are opened radially outward of the rotor 2. A wider foreign body escape groove 14 is formed.

  That is, as shown in FIGS. 2 and 4 to 7, the foreign object escape groove 14 is continuous over all of the plurality of slide guide grooves 4 along the arrangement direction, and further, a plurality of slide guides. The grooves 2 are formed in the rotor 2 in a state of being continuous to the groove outer portions 13 and 13 of the end sliding guide grooves 4a and 4a located at both ends in the alignment direction. Further, the rotation phase for inserting and removing the key of the rotor 2 is set so that the longitudinal direction intersecting the key plate thickness direction in the key insertion hole 1 is directed in the vertical direction. The foreign substance escape groove 14 is formed at a position located on the lower side of the key insertion hole 1 when in the rotational phase.

  That is, in a state where the rotor 2 is in the rotational phase for inserting and removing the key, the seven grooves located between the eight sliding guide grooves 4 are positioned below the key insertion hole 1. The outer peripheral portion of the rotor 2 is continuously connected along the axial direction of the rotor 2 over the entire portion 12 and the groove outer portions 13 and 13 of the end sliding guide grooves 4a and 4a. The foreign substance escape groove 14 in a state of opening outward is formed.

  When the foreign material escape groove 14 having such a configuration is formed, when the key K is inserted into the key insertion hole 1 with foreign matter such as sand particles attached thereto, for example, the key K and the key of the lock plate 6 are used. Even if the foreign matter comes away from the key K by coming into contact with the inner edge 11a of the passage hole 11, the foreign matter will enter the foreign matter escape groove 14 and remain attached to the inner surface thereof. That is, since grease is injected between the outer peripheral surface of the rotor 2 and the inner peripheral surface of the outer cylinder case 3 to smoothly rotate, the oil component also adheres to the inner surface of the foreign material escape groove 14. Thus, a small-diameter foreign matter such as sand particles is attached and maintained as it is, enters into a narrow gap between the lock plate 6 and the inner surface of the sliding guide groove 4, and is caught between them. There will be less fear.

[Another embodiment]
(1) In the above-described embodiment, the foreign substance escape grooves are in a state of being continuous over all of the plurality of slide guide grooves along the arrangement direction of the plurality of slide guide grooves, and the plurality of slide guide grooves. Among the end sliding guide grooves located at both ends in the arrangement direction, the rotor is formed to be connected to the outer portion of the groove, but the foreign object escape groove is configured as described above. It may replace with and may be comprised as follows.

  The foreign material escape groove is formed in a state of being continuous over all of the plurality of slide guide grooves, except for the groove outer portion of each of the end slide guide grooves located at both ends in the arrangement direction. But you can.

  Further, the foreign matter escape groove is not limited to a state in which it is formed in a state of being continuous over all of the plural (eight) slide guide grooves, and corresponds to the inter-groove portion 12 positioned between adjacent slide guide grooves. It may be formed in at least one of the locations corresponding to the plurality (seven) of the inter-groove portions 12, or two or more of the inter-groove portions 12. It may be formed into a thing. Alternatively, it may be formed only on the groove outer portion 13.

( 2 ) In the above embodiment, an example in which eight of the sliding guide grooves are formed is illustrated, but ten of the sliding guide grooves may be formed, or the number of sliding guide grooves may be other than eight or ten. The number of the sliding guide grooves is not limited to that illustrated.

( 3 ) In the above embodiment, the case where the present invention is applied to an ignition device for a car as a cylinder lock has been exemplified. However, the present invention is not limited to such a cylinder lock. Applicable.

Top view of the rotor Bottom view of rotor Front view of rotor Longitudinal side view of rotor 1 is a cross-sectional view taken along line VV in FIG. Sectional view taken along line VI-VI in FIG. VII-VII line sectional view of FIG. Longitudinal side view of cylinder lock Front view of cylinder lock Front view of cylinder lock Key top view Sectional view of rotor showing configuration of comparative example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Key insertion hole 2 Rotor 3 Outer cylinder case 4 Sliding guide groove 5 Energizing means 6 Lock plate 7 Engagement recessed part 12 Groove part 13 Groove outer part 14 Foreign material escape groove

Claims (3)

A rotor that can be rotated around an axis along the key insertion / removal direction with a substantially plate-like key inserted in the key insertion hole is provided in a state of being rotatably fitted in and supported by the outer cylinder case. ,
The rotor is formed with a plurality of sliding guide grooves along the radial direction in a state of being arranged at intervals in the axial direction, and is slidable in the radial direction in the plurality of sliding guide grooves and biasing means A plurality of lock plates are separately stored in a state of being projected and urged radially outward at
The plurality of lock plates are moved by the biasing means in a state where the rotor is in a rotation phase for inserting / removing a key with respect to the outer cylinder case and the key is removed from the key insertion hole. It becomes a rotation restricting state in which a plurality of engaging recesses formed on the inner peripheral surface of the outer cylinder case are fitted and engaged by the urging force to restrict the rotation of the rotor,
In a state where the rotor is in the rotation phase for inserting / removing the key and the key is inserted into the key insertion hole, the plurality of lock plates are engaged with the engagement recesses by engaging with the key. A cylinder lock that is configured to be in a rotation-permitted state that releases a combination and allows a rotation operation of the rotor,
In the rotor, a position corresponding to an inter-groove portion between adjacent slide guide grooves among the plurality of slide guide grooves, or an end located at an end portion in the alignment direction among the plurality of slide guide grooves. The part corresponding to the groove outer part located outside in the arrangement direction of the part side sliding guide grooves, and the part located on the outer side in the longitudinal direction of the key insertion hole as seen in the axial direction In addition, in a state where the key insertion hole and the sliding guide groove communicate with each other and are opened outward in the radial direction of the rotor, a foreign substance escape groove wider than the plate thickness of the key is formed ,
The rotation phase for the key insertion / removal of the rotor is set so that the longitudinal direction intersecting the key plate thickness direction in the key insertion hole is directed in the vertical direction,
A cylinder lock in which the foreign material escape groove is formed at a position located below the key insertion hole when the rotor is in the rotation phase for key insertion / removal .   2. The cylinder lock according to claim 1, wherein the foreign object escape groove is formed in the rotor in a state in which the foreign object escape groove is continuous over all of the plurality of sliding guide grooves along the arrangement direction.   The foreign object escape groove is formed in the rotor in a state of being connected to the groove outer portion of each of the end sliding guide grooves located at both ends in the arrangement direction among the plurality of sliding guide grooves. Item 2. The cylinder lock according to Item 2.

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