JP5463445B2 - Key with locking / unlocking display mechanism and key grip with locking / unlocking display mechanism - Google Patents

Description

  The present invention relates to a key having a function of displaying a lock / unlock state.

  Conventionally, as a technique regarding a key with a locking / unlocking display mechanism, for example, there are those described in Patent Documents 1 to 3.

  The technique described in Patent Document 1 incorporates magnets on both the lock side and the key side, and switches the display of locking / unlocking by the combination of the magnets.

  In the technique described in Patent Document 2, a small sphere that can be moved by gravity is placed in a groove formed in a direction perpendicular to the key insertion direction, and can be slid in the middle of the groove. Partition with a partition (projection). This partition is urged by a spring and normally partitions the groove. However, when the key is inserted into the lock, the partition slides by the insertion reaction force so that the small ball can move. That is, when the key is turned with the key inserted, the small ball moves downward in the released groove due to gravity, and the unlocked / unlocked state is displayed according to the position of the small ball.

JP-A-10-196175 JP 2006-16946 A

  However, in the key of Patent Document 1, it is necessary to incorporate magnets on both the lock side and the key side, and it is not possible to easily add the lock / unlock indication to the existing key.

  In addition, the key disclosed in Patent Document 2 has a problem that the lock / unlock cannot be displayed accurately when applied to a reversible type key that is used regardless of the front and back sides (upper and lower).

  In consideration of such problems, the applicant has already disclosed in Japanese Patent Application No. 2008-127839 that “into the internal space of the gripping part coupled to the key blank can be moved in a direction perpendicular to the insertion direction of the key blank with respect to the lock. By storing the ball body and rotating the key blank during the unlocking operation, the ball body is moved and held by gravity, and the position of locking or unlocking is displayed according to the held position. The invention of the key with a locking / unlocking display mechanism, characterized in that, and `` a key blank that is inserted into and removed from the keyhole of the lock, and a grip portion that is coupled to the key blank and forms a space therein, A locking / unlocking display mechanism key provided in an internal space of the gripping part, wherein the locking / unlocking display means is connected to the inner side of the key blank on the longitudinal axis. A ball body provided in a space, a holding part that allows and holds the movement of the ball body, and the gripping part that faces the holding part, and the ball body that moves the holding part is unlocked and locked. And a guide groove that is detachably attached to the holding portion and is movable in a direction perpendicular to the direction in which the key blank is inserted and removed, and the key blank is inserted into the key hole in the lock and applied. Only when the lock operation is performed, while the slider is released from the engagement with the holding portion, the restraint of the ball body by the holding portion and the slider is released, and together with the slider in conjunction with the rotation of the key blank When the ball body falls by gravity in a direction perpendicular to the insertion direction of the key blank, the ball body moves to the locked position or unlocked position and is held. The invention of the key with the locking / unlocking display mechanism, characterized in that the key blank is inserted into and removed from the key hole of the lock, and the gripping part is coupled to the key blank and forms a space therein. A locking / unlocking display means provided in an internal space of the gripping part, and a locking / unlocking display mechanism key engaging / disengaging with the locking / unlocking display means. A ball body provided in the internal space on an extension in the longitudinal axis of the key blank, a holding portion for directing the ball body in a direction orthogonal to the longitudinal axis, and the gripping portion facing the holding portion And a guide groove that guides the ball body that moves the holding portion to the unlocking position and the locking position, and is detachably provided with the holding portion and is movable in a direction perpendicular to the longitudinal axis. Form with slider When the locking / unlocking operation is not performed, the slider is sandwiched between the holding portion and the engagement / disengagement means to restrict the movement, and the ball body is restricted from moving by the holding portion and the slider. When the key blank is inserted into the keyhole for locking or unlocking operation, the engagement / disengagement operation means comes into contact with the lock so that the engagement / disengagement operation means separates from the slider and restrains the slider. And when the ball body drops together with the slider in accordance with the rotation of the key blank due to gravity, the ball body is guided by the guide groove and moved to the unlocked position or the locked position. And a key with a lock / unlock display mechanism, characterized in that the lock / lock display mechanism is reversible. It is realized applying the Le-type key.

  However, this proposed invention has a large number of parts and takes time and effort to assemble. In addition, since these complicated mechanism parts with a large number of parts are concentrated on the grip part of the key, the grip part inevitably becomes large, and there is room for improvement that the degree of freedom is limited in terms of operation and design. there were.

  Furthermore, since the lock / unlock indication is provided on the upper surface (end surface) of the grip portion of the key, if the display of the lock / unlock indication is to be displayed large at a glance, it increases the thickness of the grip portion. Equally, there was room for improvement in that the degree of freedom was low due to the balance between the operation surface and the design surface.

  The present invention has been made in consideration of the above-mentioned improvements, and has been made to provide a key (and a grip portion thereof) having a more excellent locking / unlocking display mechanism, and can display a locking / unlocking display even in a reversible type key. An object of the present invention is to realize this lock / unlock display with a compact mechanism that can be performed appropriately and has a smaller number of parts.

  The present invention provides a key blank and a key that supports the key blank and includes a grip portion that houses a lock / unlock display mechanism, and the lock / unlock display mechanism is inserted into the lock by inserting the key blank into the lock. A sliding member that contacts and slides in the longitudinal direction of the key blank; a biasing member that constantly biases the sliding member toward the distal end of the key blank; and a sliding position of the sliding member in the rotational direction of the gripping portion. It has a lock mechanism for fixing at different positions according to the operation, and a position determination means for determining the slide position of the slide member.

  That is, instead of displaying the locked / unlocked state on the outside by the position of a small ball or the like that moves due to the rotation of the gripping part, the slide body itself that slides by inserting the key blank into the lock has a predetermined condition under a predetermined condition. It fixes to a position and tries to judge the state of locking / unlocking by this fixed position. For example, when the key is inserted into the lock, a part of the slide member comes into contact with the lock and slides from the initial position. When the grip is rotated in this sliding state, the lock mechanism works only when certain conditions are satisfied in consideration of various conditions such as the rotation direction and rotation angle, and the position of this slide body is the initial position. Fix in different positions. On the other hand, when the predetermined condition is not satisfied, the slide body is not fixed and is returned to the initial position by the urging force by the urging member. As a result, the state of locking / unlocking can be determined by looking at the position of the slide body. The same applies when the lock mechanism is released.

  More specifically, the key includes a key blank and a grip portion that supports the key blank and contains a locking / unlocking display mechanism, and the locking / unlocking display mechanism is caused by gravity according to a rotation angle of the grip portion. A single movable body movable in a direction orthogonal to the longitudinal direction of the key blank, and a first movable body that restricts a movement range of the movable body and moves the movable body according to a rotation direction of the grip portion. The guide member having two regions and fixed to the grip portion, and can be moved toward and away from the guide member in the longitudinal direction of the key blank. When approaching, the movable body is held between the guide member and the guide member. And has a protrusion that can only enter the first region, and a part of itself is exposed to the outside of the grip portion toward the tip end of the key blank. A switch that senses whether or not it is inserted into the lock. And the member is configured to include a biasing member for constantly urging the the switch member toward the distal end of the key blank, a position determining means for determining the longitudinal position of the switch member.

  The moving body moves to the position of either the first region or the second region according to the rotation direction and angle of the grip portion. Thereafter, when the key blank is pulled out from the lock, the switch member is pushed back toward the front end of the key blank by the urging member, but when the moving body is in the first region, the protrusion formed on the switch member is Contact the moving body. On the other hand, when the moving body is in the second region, the protruding portion of the slide member can enter the first region. That is, the relative position (relative position between the guide member and the switch member) where the movable body is sandwiched between the two members changes between when the movable body is in the first region and when the movable body is in the second region (the lock member is locked). mechanism). Since the guide member is fixed to the grip portion side, a change in the relative position appears as a change in the position of the switch member. The state of locking / unlocking can be determined by observing the change of the position of the switch member.

  Since the main part of the mechanism for displaying the locking / unlocking is realized by only four members: a single moving body, guide member, switch member, and biasing member, the number of parts is small and assembly is easy. In addition, since there is no complicated movement of the member as in the pantograph structure, it is possible to maintain high repeatability and excellent durability.

  In addition, it is preferable that the position determination unit includes a display window formed on the grip portion and a marking formed on the slide member at a position visible from the display window.

  With such a configuration, it is possible to determine the position of the switch member and also the state of locking / unlocking only by looking at the presence or absence of the marking displayed on the display window or the type of marking. The marking may be, for example, a character, a figure, a symbol, or a combination thereof, and may be a shape, a pattern, a color of the switch member itself, or a combination thereof.

  In addition, by forming the display window on either or both of the front surface and the back surface of the grip portion, it is possible to realize a lock / unlock display that is easy to see and judge. In addition, since the display window is provided on the front surface and / or back surface of the grip portion, for example, even when the display window is enlarged and configured to be easier to see, it is not necessary to increase the thickness of the grip portion, and the operation surface and design The degree of freedom is not limited in terms of surface.

  In addition, the guide portion is a bottomed rectangular cylindrical body having a substantially rectangular shape in plan view, and the center of the four sides of the wall surface that restricts the movement range of the moving body protrudes inward to form a raised portion, and One guide projection for guiding the movement of the moving body is formed at a position equidistant from the intersection with the imaginary line connecting the ridges on the long side on the imaginary line connecting the ridges on the side. It is desirable to configure as follows.

  By adopting such a configuration, the first and second regions in which the moving body moves can be formed, and the moving body can be appropriately set according to the initial position of the moving body, the rotation direction and the rotation angle of the grip portion. It is possible to guide to any one of the second areas. Moreover, it is also possible to easily perform integral molding using a resin or the like, thereby preventing an increase in the number of parts.

  Specifically, with a virtual line connecting the raised portions on the short side as a boundary, one side is the first region, the other side is a second region, and the first and second regions are The imaginary line connecting the ridges on the long side is reversed and configured.

  That is, one of a pair of cross-arranged regions among the four moving regions branched in four directions in an X shape around the intersection is a first region, and the other is a second region. With this configuration, application to a reversible key is not a problem.

  In the first region, it is desirable to form a through hole through which a protrusion formed on the switch member can pass.

  By forming the through hole, it is possible to prevent the protrusion (of the switch member) from accidentally contacting the guide member and to make the protrusion longer, and whether there is a moving body. It is possible to ensure a large difference in relative position (position where the guide member and the switch member hold the moving body).

  In addition, it is preferable that at least the side surface of the guide protrusion on the side of the intersection is formed in an arc shape. Alternatively, it is desirable that the guide protrusion is formed in a round shape in plan view.

  By comprising in this way, it becomes possible to guide the movement of a moving body smoothly and to improve the accuracy of a locking / unlocking display.

  Moreover, it is desirable to form the said mobile body in the bone | frame shape by which only the both ends of the rod-shaped member were largely formed.

  With such a configuration, the moving body can be configured as a single body, and the function realized by the movement of the two spheres can be realized even with a single moving body. Moreover, it is easy to integrally mold with resin or the like, and the increase in the number of parts is prevented. .

  In addition, the present invention, in a different way, is a key grip portion containing a lock / unlock display mechanism, wherein the lock / unlock display mechanism is attached in accordance with the longitudinal direction of the key blank attached according to the rotation angle of the grip portion. A single movable body that is movable in a direction orthogonal to each other; first and second regions that limit a movement range of the movable body and move the movable body according to a rotation direction of the grip portion; and The guide member fixed to the grip portion and the guide member can be approached and separated in the longitudinal direction of the key blank, and when approaching, the movable body can be sandwiched and held between the guide members. And a protrusion that can only enter the first region, and a part of itself is exposed to the outside of the grip portion toward the distal end of the key blank to determine whether or not it is inserted into the lock. The switch member to be sensed and the switch member The key blank includes a biasing member that biases the key blank in the distal direction, and a position determination unit that determines the longitudinal position of the switch member. Is also possible.

  In other words, it is possible to deal with various types of keys by replacing the key blank as appropriate, and by providing this grip part to an existing key blank, it is possible to easily provide a key with a lock / unlock display mechanism. Is possible.

  According to the present invention, since the locking / unlocking display mechanism can be realized with a small number of parts, the assembling work is facilitated and the cost can be reduced. Moreover, since it can be configured compactly with a small number of parts, the degree of freedom in designing the grip portion is improved, and a key (grip portion) excellent in operation and design can be provided.

It is a front (surface) figure of the key provided with the locking / unlocking display mechanism which shows an example of embodiment of this invention. It is the partially exploded perspective view which showed the internal structure of the key. It is a perspective view of a switch member (sliding member). (A) is a right side view of the switch member (slide member), (b) is a front view of the switch member (slide member), (c) is taken along the line cc of FIG. 4 (b). Sectional drawing which follows, (d) is sectional drawing which follows the arrow dd line of FIG.4 (b), (e) is a rear view of a switch member (sliding member). (A) is a perspective view of a guide member, (b) is the same top view, (c) is sectional drawing which follows the arrow cc line of FIG.5 (b). (A) is a perspective view of a mobile body, (b) is the front view, (c) is the bottom view. It is a perspective view of a stopper. It is the figure which showed the process in which a moving body is guided to a guide member according to rotation of a grip part, Comprising: (a) is a figure which showed the initial state, (b) is 90 degrees to the right. It is the figure which showed the state rotated, (c) is the figure which showed the state which rotated 90 degrees to the left from the state of (b), and returned the grip part to the original position, (d) is an initial stage. It is the figure which showed the state which rotated the grip part 90 degrees to the left from the state, (c) rotated 90 degrees to the right from the state of (d), and showed the state which returned the grip part to the original position. (E) is a figure which showed the case where the moving body was located upwards, when inserting a key into a lock. It is a partially exploded perspective view which shows the state by which the key blank was inserted into the lock. It is a partially exploded perspective view which shows the state where the key blank is not inserted in the lock, Comprising: It is the figure which showed the state in case a moving body is located in a 1st area | region. It is a partially exploded perspective view which shows the state where the key blank is not inserted in the lock, Comprising: It is the figure which showed the state in case a moving body is located in a 2nd area | region. It is the schematic which showed the positional relationship of a guide member and a moving body according to the rotation angle of a grip part. It is the figure which showed the process in which a moving body moves within a guide member.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a front view of a key provided with a lock / unlock display mechanism showing an example of an embodiment of the present invention, and FIG. 2 is a partially exploded perspective view showing an internal structure of the key.
<Configuration of key with locking / unlocking display mechanism>
As shown in FIG. 1, the external appearance of a key with a locking / unlocking display mechanism (hereinafter also simply referred to as “key”) 1 mainly includes a key blank 2 and a grip portion 3 that supports and fixes the key blank 2. . In addition, a lock / unlock display mechanism 4 is provided inside the grip portion 3.

  The key blank 2 is formed from a metal that is easy to work and has wear resistance, such as a white or the like, and is inserted into a key hole of a lock (not shown) and rotated by a required angle to perform locking or unlocking. In the case of the present embodiment, the key 1 is a reversible key that can be locked and unlocked by inserting it into the keyhole in a horizontal state and rotating 90 ° clockwise (right) or counterclockwise (left) from this state.

  The grip portion 3 is made of a synthetic resin material, such as ABS resin, and has an internal space 5 formed therein. The grip portion 3 is mainly composed of a case 10 having a two-piece structure divided on the front side and the back side, and a display window 11 is formed on the front side of the case 10. Reference numeral 70 denotes a stringing member for locking the key 1 through a string or the like.

  Inside the case 10, a lock / unlock display mechanism 4 is accommodated. The locking / unlocking display mechanism 4 includes a switch member 20, a guide member 40, a moving body 50, a coil spring (biasing member) 60, and position determination means 6.

  As shown in FIGS. 3 and 4, the switch member 20 has a substantially rectangular flat plate-shaped sandwiching plate 21, a display portion 25 provided with a marking 25 a, and a part exposed outside the case 10. It has the detection part 27 (27a, 27b) which senses the presence or absence of the insertion to a lock, and the stem part 24 which connects the clamping board 21 and the display part 25. In this embodiment, these are all integrally formed of resin. The switch member 20 can be moved back and forth in the longitudinal direction of the key blank 2 within a predetermined range in the case 10.

  On the lower surface (lower surface in FIG. 4) side of the sandwiching plate 21, projections 23 are respectively formed from both longitudinal ends of the sandwiching plate 21. Each of the protrusions 23 is formed to extend from the clamping plate 21 toward the detection unit 27 (that is, downward). One projection 23a is formed closer to the front side, and the other projection 23b is formed closer to the rear side. That is, it is formed so as to be stepped. Similarly, two substantially oval convex surface portions 22 are formed on the lower surface of the sandwiching plate 21. As can be easily understood from the drawings, the convex surface portion 22 is formed shorter (lower) than the projection portion 23.

  The stem portion 24 extending downward from the center of the front side end of the sandwiching plate 21 has a substantially triangular cross section and can be fitted into a recess 45 (details will be described later) of the outer peripheral surface of the guide member 40 described later. It has become.

  The display unit 25 is configured to be wider than the stem unit 24, and a marking 25a is applied to the upper part on the front side. The marking 25 a plays a role of displaying the locked / unlocked state to the outside through the display window 11 provided in the case 10. The marking 25a is shown as cross-hatching in the drawing, but is not limited to this, and is a combination of characters such as “open” and “closed”, figures, symbols, and the like. There may be. Furthermore, it may be expressed by the shape, pattern, color, or combination thereof of the display unit 25 itself.

  The detection unit 27 is divided into two parts and includes a first detection unit 27a and a second detection unit 27b. A gap G between the detection portions 27a and 27b is a portion into which the key blank 2 is inserted, and plays a role of “escape” with respect to the key blank 2. Moreover, the front end surfaces of both detectors 27a and 27b are formed in an arc shape.

  Reference numeral 26 denotes an overhanging portion that contacts the inner surface of the case 10 to the extent that it can slide, and positions the switch member 20 relative to the case 10 (positioning in the vertical direction in FIG. 2).

  As illustrated in FIG. 2, the switch member 20 is accommodated in the internal space 5 of the case 10. However, only the tip of the detection unit 27 is exposed to the outside from the case 10. This exposure is exposed so as to extend from the root of the key blank 2 along the key blank 2 in the tip direction. Further, the overhanging portion 26 of the switch member 20 is incorporated so as to contact the first guide wall 10 a of the case 10. Further, both side surfaces of the sandwiching plate 21 of the switch member 20 are incorporated so as to contact the second guide wall 10b. As described above, the switch member 20 is configured to move back and forth (slide) in the longitudinal direction of the key blank 2 but hardly move in the direction orthogonal to the longitudinal direction.

  As shown in FIG. 5, the guide member 40 is a bottomed rectangular tube having a substantially rectangular shape in plan view. A wall surface 42 is formed so as to surround the bottom surface 41 over the entire circumference. The wall surface 42 has a function of limiting the moving range of the moving body (details will be described later) 50. The center of the four sides of the wall surface 42 rises inward at a predetermined angle to form a raised portion 42, and connects the raised portion 42b on the long side on the virtual line v1 connecting the raised portions 42a on the short side. One guide protrusion 43 that guides the movement of the moving body 50 is formed at a position equidistant from the intersection cp with the virtual line v2. In addition, through holes 44 are formed in the vicinity of the raised portion 42 a on the short side of the bottom surface 41. The through hole 44 is a hole through which the protruding portion 23 formed in the sandwiching plate 21 of the switch member 20 passes.

  Further, the guide member 40 is virtually divided into four by the two imaginary lines v1 and v2. Of these, the region where most of the through holes 44 are located is the first movement region α. The others are the second movement region β. That is, one side is a first region α and the other side is a second region β with a virtual line v1 connecting the ridges 42a on the short side as a boundary. Further, the first and second regions α, β are The imaginary line v2 connecting the long side raised portions 42b is reversed and positioned.

  The guide member 40 is fixed to the case 10. In addition, the stem 24 of the switch member 20 is fitted in one of the two recesses 45 formed on the outer peripheral surface, and the bottom surface 41 is disposed in the case 10 so as to be positioned in the distal direction of the key blank 2. Has been incorporated. As a result, when the switch member 20 moves in the distal direction of the key blank 2, the sandwiching plate 21 approaches the guide member 40 side. At this time, when the moving body 50 to be described later is in the first region α of the guide member 40, the protrusion 23 is in contact with the moving body 50 and is thus fixed at the contacted position. When the moving body 50 is in the second region β of the guide member 40, the projecting portion 23 passes through the through hole 44 and approaches the guide member 40, and the convex surface portion 22 contacts the moving body 50. It is configured to be fixed at the time.

  As shown in FIG. 6, only the both ends of the rod-like member are formed in a circular shape in plan view, and the moving body 50 is configured in a so-called “bone shape” as a result. That is, it is comprised from the two cylindrical parts 52 and the connection part 54 which connects this. Further, the thickness of the connecting portion 54 (the thickness in the height direction in FIG. 6) is configured to be thinner than the thickness of the cylindrical portion 52. As a result, a gap G2 is formed. The height of the gap G2 is formed to be larger than the height of the guide protrusion 43 of the guide member 40 described above, and the connecting portion 54 and the guide protrusion 43 contact each other when the moving body 50 moves in the guide member 40. It is configured not to. Moreover, the shape of both ends does not necessarily need to be a cylindrical shape, and can be configured in the form of a sphere, a semicircle, a hemisphere, or the like.

  The moving body 50 is for realizing the function with two spheres so far and realizing the function with a single member, and is equivalent to what is known as two connecting spheres with connecting members. . The moving body 50 is incorporated in the guide member 40 with the gap G2 facing downward. As a result, the moving body 50 can be sandwiched between the bottom surface 41 of the guide member 40 and the sandwiching plate 21 of the switch member 20.

  As shown in FIG. 2, the coil spring (biasing member) 60 is for constantly urging the switch member 20 toward the distal end of the key blank 2, and the upper surface side of the holding plate 21 of the switch member 20. Is arranged. The spring rate can be selected as appropriate, but is set to such an extent that the switch member 20 can be sufficiently energized and does not increase excessively when the key blank 2 is inserted into the lock. In addition, in this embodiment, although arrange | positioned at the upper surface side of the clamping board 21, it is not necessarily a requirement to arrange | position in this position. Further, it may be constituted by a plurality of coil springs, and as long as the switch member 20 can be urged, an elastic body other than the coil spring (for example, rubber, leaf spring, disc spring, etc.) can be widely applied.

  As shown in FIGS. 1 and 2, the position determination means 6 is provided with a marking 25 a applied to the display portion 25 of the switch member 20 and the marking 25 a of the case 10 in order to visually recognize the marking 25 a from the outside. And a display window 11. In other words, the marking 25a visible from the display window 11 is visible or invisible depending on whether it is locked or unlocked. Alternatively, the marking 25a displayed in the locked state and the marking 25a displayed in the unlocked state are changed.

  Reference numeral 80 denotes a stopper (see FIG. 7). The stopper 80 is a member that prevents the moving body 50 from jumping out of the guide member 40 by attaching the moving body 50 to the guide member 40 and attaching the lid to the guide member 40. The stopper 80 has two recesses 80a. The concave portion 80a is for escaping the convex surface portion 22 formed on the sandwiching plate 21 of the switch member 20, and the sandwiching plate 21 sandwiches the moving body 50 through the concave portion 80a (the bottom surface 41 of the guide member 40). Between the two).

In addition to the synthetic resin material such as ABS, the grip portion 3 can be formed using a material other than other resin, such as aluminum die-casting or firing and powder metallurgy.
<Key lock / unlock operation with lock / unlock display mechanism>
Next, the lock / unlock operation of the key 1 and the action accompanying it will be described with reference to FIGS. In the following embodiments, the operation of inserting the grip portion 3 of the key 1 into the keyhole of the lock while holding it horizontally, rotating it 90 ° clockwise (clockwise) from that state, and then returning 90 ° is not possible. On the other hand, an operation of rotating 90 degrees counterclockwise (counterclockwise) and then returning 90 degrees is a locking operation. The key blank 2 is assumed to be a reversible type in which both sides can be inserted. Of course, it can be applied to a reversible type, and can be applied to a non-reversible type key blank whose insertion direction is determined.

In addition, in FIG. 8, since the movement of the guide member 40 and the moving body 50 is typically shown, the details are not illustrated intentionally. Further, the symbols α and β shown around the guide member 40 indicate whether the vicinity to which the symbols are attached is the first region α or the second region β (FIG. 9 to FIG. 9). 11 is the same).
(initial state)
Hereinafter, the state of FIG. 8A will be described as an initial state for convenience of description. Here, since the moving body 50 is located in the first region α of the guide member 40, the tip of the protrusion 23 formed on the holding plate 21 of the switch member 20 abuts on the moving body 50, and the switch member 20. Cannot move to the tip side of the key blank 2 any more. Further, in this state, the marking 25a cannot be visually recognized from the display window 11, and only the ground color of the display unit 25 of the switch member 20 can be visually recognized. In addition, although this state is demonstrated here as an unlocked state, it is good also considering this state as a locked state on the contrary.

(When the initial key is pressed against the lock)
When the key blank 2 is inserted into the lock in the initial state, the switch member 20 slides because the front end surface of the detection unit 27 contacts the lock 90 as shown in FIG. As a result, the holding of the moving body 50 held between the protrusion 23 and the guide member 40 (the bottom surface 41) in the initial state is released, and the moving body 50 can move freely. As shown in FIG. 8 (a), when the moving body 50 was originally positioned on the lower side, it does not move any further after the release, and the state in which the previous positional relationship is maintained. Become. On the other hand, as shown in FIG. 8 (f), when the moving body 50 is originally positioned upward, the mobile body 50 falls freely by being released. However, even in this case, due to the presence of the raised portion 42b and the guide protrusion 43 of the guide member, the guide member always falls and moves only to the first region α side. As a result, the same state as in FIG.
(When unlocking is performed from the initial state)
Next, as shown in FIG. 8 as a flow of a → b → c, an initial state, that is, a case where a key that has already been unlocked is erroneously further unlocked will be described. The unlocking operation is rotated 90 ° clockwise (clockwise) and then returned 90 °. However, even if rotated 90 ° clockwise (clockwise), as shown in FIG. There is no change in the positional relationship with the moving body 50. Thereafter, the same is true when the angle is returned by 90 °, and only returns to the same state as the initial state. That is, even if the key blank 2 is removed from the lock as it is, the lock / unlock display does not change, and the unlock display remains displayed (see FIG. 9). Even when the operation is erroneously performed in the opposite direction, the lock / unlock display is not erroneously displayed.
(When locking is performed from the initial state)
Next, as shown in FIG. 8 as a flow of a → d → e, a case where the key in the initial state, that is, the unlocked state is locked will be described. The locking operation is rotated 90 ° counterclockwise (counterclockwise) and then returned 90 °. When rotated 90 ° counterclockwise (counterclockwise), as shown in FIG. 8D, one end of the moving body 50 (the end on the side engaged with the raised portion 42a) falls from gravity, and the second Move to the region β side. After that, even if the angle is returned by 90 °, the moving body 50 remains in the second region β as shown in FIG. When the key blank 2 is removed from the lock in this state, the tip of the projection 23 of the switch member 20 does not contact the moving body 50 and penetrates the through hole 44 formed in the bottom surface 41 of the guide member 40 (see FIG. 11). As a result, the switch member 20 is moved and fixed in the distal direction of the key blank 2 as compared with the initial state, so that the marking 25a slides and moves to a position where it can be seen from the display window 11. That is, the lock / unlock display becomes “locked state”. Although not shown in the drawing, even when the locked key is further locked, the area where the moving body 50 is located does not change, as in the case where the unlocked key is further unlocked. The status display continues.

  In addition, by the combination of the guide member 40 and the moving body 50 of the present embodiment, the moving body 50 moves from the first area α to the second area β in the halfway locking / unlocking operation. The region β is not moved to the first region α. More specifically, as shown in FIG. 12A, when the inclination of the guide member 40, that is, when the rotation angle θ of the grip portion 3 is about 30 °, the presence of the raised portion 42a causes the moving body 50 to move. The area never changes. In this embodiment, the region is changed when θ becomes about 70 ° as shown in FIG. The adjustment to such a degree of change can be appropriately adjusted by adjusting the degree and angle of the protrusion 42a.

  Further, as shown in FIG. 13, even when the moving body 50 moves so as to drop from the upper side to the lower side due to gravity, the moving body 50 is caught by the side shape of the guide protrusion 43 formed on the guide member 40. Smooth movement is achieved without any occurrence. Moreover, the area does not change by mistake. In other words, the moving body in the first region α is surely distributed to the first region α, and the moving body in the second region β is always distributed to the second region β. .

  Thus, the marking 25a that can be visually recognized through the display window 11 is changed by the locking / unlocking operation of the key 1 with the locking confirmation display mechanism, so that it is convenient to easily determine whether it is in the locked state or in the unlocked state.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and technical idea thereof.

DESCRIPTION OF SYMBOLS 1 Key 2 Key blank 3 Grip part 4 Locking / unlocking display mechanism 5 Internal space 10 Case 11 Display window 20 Switch member (sliding member)
21 Nipping plate 22 Convex part 23 Protrusion part 24 Stem part 25 Display part 26 Overhang part 27 Detection part 40 Guide member 45 Recess 50 Moving body 60 Spring (biasing member)
70 Stringing member 80 Stopper

Claims (9)

A key provided with a gripping part that supports a key blank and a key blank and contains a locking / unlocking display mechanism,
The locking / unlocking display mechanism is
A single movable body that is movable in a direction perpendicular to the longitudinal direction of the key blank by gravity according to the rotation angle of the grip portion;
Comprising a first region and a second region in which the moving body moves in accordance with the rotation angle of the grip while limiting the range of movement of the moving body, and a guide member fixed to said grip portion,
The guide member can be approached and separated in the longitudinal direction of the key blank. When approaching, the movable body can be held and held between the guide member and can only enter the first region. A switch member that has a protruding portion, and that senses whether or not it is inserted into the lock by exposing a part of itself to the outside of the grip portion toward the distal end of the key blank,
A biasing member that constantly biases the switch member toward the distal end of the key blank;
Position determining means for determining the position of the switch member in the longitudinal direction,
key. The position determination means includes a display window formed in the grip portion and a marking formed at a position visible from the display window in the switch member.
The key according to claim 1 . The display window is formed on either the front surface or the back surface of the grip portion, or both,
The key according to claim 2 . The guide member is a bottomed rectangular cylindrical body having a substantially rectangular shape in plan view, and the center of the four sides of the wall surface that limits the moving range of the moving body protrudes inward to form a raised portion, and the short side One guide projection for guiding the movement of the moving body is formed at a position equidistant from the intersection with the imaginary line connecting the ridges on the long side on the imaginary line connecting the ridges. It is characterized by
The key according to claim 1. Characterized in that said said a one side as a boundary to an imaginary line connecting the ridge of the first region other side of the short side is the second region,
The key according to claim 4 . Further, the first region and the second region are inverted with respect to a virtual line connecting the raised portions on the long side,
The key according to claim 5 . In the first region, a through-hole capable of penetrating a protrusion formed on the switch member is formed,
The key according to claim 6 . A key grip containing a lock / unlock display mechanism,
The locking / unlocking display mechanism is
A single movable body movable in a direction orthogonal to the longitudinal direction of the key blank attached according to the rotation angle of the grip portion;
Comprising a first region and a second region in which the moving body moves in accordance with the rotation angle of the grip while limiting the range of movement of the moving body, and a guide member fixed to said grip portion,
The guide member can be approached and separated in the longitudinal direction of the key blank. When approaching, the movable body can be held and held between the guide member and can only enter the first region. A switch member that has a protruding portion, and that senses whether or not it is inserted into the lock by exposing a part of itself to the outside of the grip portion toward the distal end of the key blank,
A biasing member that constantly biases the switch member toward the distal end of the key blank;
Position determining means for determining the position of the switch member in the longitudinal direction,
Key grip. A case to which a key can be attached;
A movable body housed in the case and movable in a direction perpendicular to the longitudinal direction of the key by gravity according to a rotation angle of the case;
A guide unit that restricts a moving range of the moving body and includes at least a first area and a second area where the moving body can move according to a rotation angle of the case;
While the moving body moves to the first area, it is possible to enter the guide unit, while the moving body moves to the second area, so that the moving body moves to the first area. A slide part that has at least a protrusion whose sliding amount is limited as compared with the case of moving to the region, and is capable of approaching or separating in the longitudinal direction of the key with respect to the guide part,
A switch part that is exposed outside the case toward the tip of the key and is capable of sliding the slide part in the longitudinal direction by contacting the lock;
An urging member that constantly urges the switch portion toward the distal end of the key;
Position determining means for determining the position of the slide portion in the longitudinal direction,
Key grip.