JP2012172495A - Portable key insertion auxiliary tool for lock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a key insertion auxiliary tool for a lock, capable of automatically guiding an insertion portion of a key to a keyhole to insert the key into the keyhole and retaining the key in a stable state.SOLUTION: A key insertion auxiliary tool for a lock comprises: a key 16 supported by an outer cylindrical body 1 through a key guide 7 in a backward movable and rotatable manner; a connecting body 21 for engaging with the outer cylindrical body in a backward movable manner in a non-rotation state and protruding from a tip opening of the outer cylindrical body; a key return spring 31 for continuously urging the key toward a protruding direction; and a connecting body return spring 41 for continuously urging the connecting body toward the protruding direction. When the key is pressure-contacted in a crossing state to a keyhole a of a lock X to allow the key to be rotated by being guided by the key guide, a movable key holding body 9 is also rotated together with the key while being supported by the connecting body. When the connecting body is retracted to a prescribed position while being pressed against the periphery of the keyhole of the lock (including a part of the keyhole) and the insertion portion of the key completely enters the keyhole, an engaging back end portion of the connecting body is engaged with an engaging part 51 to integrally connect the outer cylindrical body, the connecting body and the key.

Description

  The present invention relates to a portable lock key insertion aid.

  In Patent Document 1, “from the viewpoint of barrier-free, the purpose is that the lock can be easily unlocked by pushing the key with a finger”, and “the cam engagement portion and the tip surface on the outer surface of the cylindrical cam. A lock key is disclosed which includes a key body having a blade portion and a storage case having a curved control guide portion which engages with the cam engaging portion and engages with the cam engaging portion.

  This lock key is portable as in the present invention, and is intended to easily lock and unlock the lock, but the intended purpose of the present invention is to “lock the keyhole of the lock. Regardless of the shape, horizontal direction or vertical direction, even if the keyhole angle does not match the key insertion angle, the key is automatically guided to the keyhole on the lock. The key portion is pressed against the edge of the keyhole in an intersecting state, so that the key is stably held. Therefore, the problems and configurations of the invention are different.

Patent Document 2 describes a key storage case including an outer cylinder and an inner cylinder that is slidably engaged with the outer cylinder. FIG. 1 shows an outer cylinder similar to the present invention. The matter of pressing the front end surface of the inner cylinder body around the keyhole of the lock while holding is described.
However, the object of the invention of Patent Document 2 is to provide a key usage detecting means at a low cost without remodeling the lock, and the problems and configurations of the invention are different as in Patent Document 1.

JP 2007-162230 A FIG. 1 of Japanese Patent Laid-Open No. 2001-207701

  The first object of the present invention is to determine the keyhole of the lock even if the keyhole angle does not match the key insertion angle, regardless of the shape of the keyhole of the lock, horizontal direction or vertical direction. While pressing the tip of the lock key insertion aid around, the key insertion part is automatically guided and inserted into the keyhole, and the key insertion part is pressed against the edge of the keyhole when inserting the key. However, the key can be stably held in a horizontal state. The second object is that when the key hole angle and the key insertion angle do not match, the outer cylinder, the coupling body (for example, the cylindrical body), and the key are integrally coupled to each other regardless of the angle difference. It is to realize locking and unlocking operations before the lock. The third object is to expand the range of the rotation angle of the key body, and for example, the key insertion part can be applied to a flat blank key that does not have a plurality of notches on both side edges.

  The portable lock key insertion assisting device according to the present invention includes a key supported on an outer cylinder through a key guide so as to be reversible and rotatable, and a reciprocating motion in a non-rotating state on the outer cylinder via a guide means. A connecting body that engages and projects from the front end opening of the outer cylinder, a key return spring that always biases the key in the projecting direction, and a connection body return spring that always biases the connecting body in the projecting direction And a movable key holder that rotates together with the key while holding the insertion portion of the key on the front end side of the coupling body, and a key rotation stop on the rear end side of the key. When the key is guided and rotated by the key guide when the key is pressed against the key hole of the lock in a crossed state, the movable key holding body is also supported by the coupling body together with the key to rotate and connect. While the body is pressed around the lock hole (including part of it), it moves back to the specified position. In addition, when the insertion part of the key is completely inserted into the key hole, the rear end portion of the coupling body engages with the engagement portion, and the outer cylindrical body, the coupling body, and the key are integrally coupled. It is characterized by doing.

(A) Even if the key 11 is not exactly aligned with the keyhole a, the key 11 is automatically guided to the keyhole a by simply holding and pressing the outer cylinder, so that the insertion is easy. Further, even when the key insertion portion is pressed against the edge of the keyhole when the key is inserted, the rear end portion of the key 11 is supported so as to be rotatable by the key guide in the outer cylinder. Since the distal end portion is supported by a movable key holding body provided on the distal end side of the connecting body, the key is stably held in a horizontal state. Therefore, failure of the key insertion aid can be prevented.
(B) The locking / unlocking operation of the lock can be performed with the outer cylinder pressed against the lock. In addition, not only when the angle of the key 11 and the angle of the keyhole a completely match, but also when the angles of both do not match, the tip surface of the movable key holder 9 is placed in the keyhole a of the lock X or the surrounding b. When the outer cylinder 1 is pressed while being pressed, the key 11 pressed against the edge of the keyhole a is rotated, and finally the insertion portion is guided and inserted into the keyhole a, and at the same time, the movable key holder 9 is retracted. Since the connecting body 21 starts to move backward after that, the rear end part captures the engaging part of the key 11, and the constituent members 1, 11, 21 are integrally coupled, so that a simple procedure operation can be performed. You can lock and unlock the lock.
(C) Since the range of the rotation angle of the key body can be expanded, for example, the key insertion portion can be applied to a flat blank key that does not have a plurality of notched grooves on both side edges. 2. The invention according to claim 4).
(D) In the case of an embodiment in which the movable key holding body is provided so as to rotate at a predetermined position, for example, at the tip of the coupling body, the key insertion aid can be made compact, and (a) The effect of (2) can be realized with certainty (the invention according to claim 2).
(E) The invention described in claim 3 can realize the effect of (a) although the number of spring members is increased.
(F) In the invention described in claim 5, the key guide, the spring member, and the like can be easily combined with the outer cylinder.

FIG. 1 to FIG. 18 are explanatory views showing the best example (first embodiment) of the present invention. 19 and 20 are each explanatory views showing a second embodiment of the present invention. FIG. 21 is a schematic explanatory diagram of the third embodiment.
BRIEF DESCRIPTION OF THE DRAWINGS Schematic explanatory drawing which shows the whole environmental state of this invention. Schematic explanatory drawing of an initial state. FIG. 3 is an end view taken along line 3-3 in FIG. 2. FIG. 4 is an end view taken along line 4-4 of FIG. Explanatory drawing which shows the principal parts (engagement part for a key rotation stop, a key guide, a return spring for keys, etc.). The schematic explanatory drawing which showed the outer cylinder body, the connection body, etc. with the longitudinal cross-section. Explanatory drawing of the state which abbreviate | omitted the movable key holding body and the coupling body. Explanatory drawing of the principal part (omit internal structure). FIG. Explanatory drawing of the movable key holding body at the time of pressing the front end surface of a key against the edge of the keyhole of a lock. FIG. 3 is an explanatory diagram of a halfway state in which the key insertion portion starts to enter the keyhole when operated from the initial state of FIG. 2. Explanatory drawing by which a key is guided to the key guide of an outer cylinder (it retreats, rotating). Explanatory drawing which the rear-end part of the inner cylinder body as a connection body engages with the engaging part of a key. Explanatory drawing in which the insertion part of the key has completely entered the keyhole of the lock. Explanatory drawing to the effect that an inner cylinder, a key, and an outer cylinder can rotate integrally. Explanatory drawing which shows the external appearance structure at the normal time of 1st Embodiment. Explanatory drawing which shows the external appearance structure in each operation mode. Explanatory drawing which shows the external appearance structure at the time of locking and unlocking of a lock. Explanatory drawing which shows the best Example (2nd Embodiment) of this invention. The schematic cross-section explanatory drawing of the principal part containing a movable key holding body. The schematic explanatory drawing of 3rd Embodiment which changed the design of a part of 1st Embodiment.

  Hereinafter, the best mode for carrying out the present invention shown in FIGS. 1 to 18 will be described.

(1) Environment for Implementing the Invention FIG. 1 is a schematic explanatory diagram showing the environment for implementing the invention. FIG. 2 is a schematic explanatory diagram before pressing the front end surface of the key, the front end surface of the movable key holding body, or the like into the keyhole or the like of the lock. 1 and 2, X is a lock, a is a key hole of the lock, b is the periphery of the key hole (front surface), Y is a door, and Z is a portable key insertion aid for a lock according to the present invention ( Hereinafter, it is referred to as a “key insertion aid”.

  As shown in the conceptual diagrams of FIGS. 1 and 2, the key insertion assisting tool Z includes an outer cylinder 1 having a key guide 7 at the rear end, and the key A key 11 supported so as to be retractable and rotatable via a guide 7 is engaged with the outer cylinder 1 so as to be retractable in a non-rotating state via guide means 3 and 23, and the outer cylinder 1 The key guide 7 is provided with a part or all of a connecting body 21 as an example of a connecting body that protrudes from the opening end (tip opening) 4 and covers a part or all of the key, and the key 11. A return spring 31 for the key that always urges the connecting body 21 in the protruding direction, and a return for the connecting body that is partially or wholly provided in the inner space 2 of the outer cylinder 1 and that always urges the connecting body 21 in the protruding direction. A spring 41 is provided.

  Thus, in the first embodiment, the movable key holding body 9 that rotates together with the key 11 while holding the insertion portion (key body) 16 of the key 11 is provided at the distal end portion of the cylindrical coupling body 21. Further, an engagement portion 51 for stopping rotation of the key is provided on the rear end side of the key 11, and when the key 11 is guided and rotated by the key guide 7 when it is pressed against the key hole a of the lock X, When the movable key holding body 9 also rotates together with being supported by the connecting body 21, and further when the connecting body 21 is retreated to a predetermined position while being pressed around the key hole a (including a part) of the lock. The key 11 completely enters the key hole a. At this time, the engagement rear end portion (for example, engagement teeth of the inner peripheral wall) 22 of the coupling body 21 is the engagement portion (for example, spur gear-shaped engagement teeth) 51. To the outer cylindrical body 1 and the cylindrical coupling body 21 Over 11 integrally coupled respectively.

(2) Key hole a of lock X
The key hole a of the lock X may be either horizontal or vertical. In addition, the shape of the key hole a is, for example, one having notched key grooves on both side edge portions of the insertion portion referred to as a blade portion, or a geometric groove, inverted frustoconical recess on a flat surface referred to as a blank key, etc. It is sufficient that each of those having a can be inserted. As shown in FIGS. 7 and 11 and the like, the key of this embodiment is called a blank key, and the key hole a of the lock X is, for example, a simple horizontal hole.

(3) Outer cylinder 1 of the key insertion aid Z
3 is an end view taken along line 3-3 in FIG. As shown in FIG. 3, the key insertion assisting tool Z includes a connecting body 21 as an example of a connecting body, and an outer cylinder 1 that engages with the inner cylinder. And the key 11 shown by hatching is located in the approximate center part of the internal space of the connection body 21. FIG.
The connecting body 21 and the outer cylinder 1 are both formed in a cylindrical shape, and in this embodiment, the plurality of engaging projections 23, 23 constituting one of the guiding means are the left and right sides of the outer peripheral wall of the pipe-like connecting body 21. A pair of engaging grooves 3, 3 constituting the other of the guide means is formed in the left and right portions of the inner peripheral wall of the outer cylindrical body 1 along the length direction.

  Since the engaging protrusions 23 and 23 of the connecting body 21 are engaged with the engaging grooves 3 and 3 of the outer cylinder 1, the connecting body 21 is connected to the outer cylinder 1 via a plurality of guide means 3 and 23. Thus, it is engaged in a non-rotating state and capable of moving backward.

  Here, the configuration of the outer cylinder 1 will be described with reference to FIG. 2. Reference numeral 2 denotes an inner space of the outer cylinder 1, and this inner space 2 includes an annular stopper portion 5 that forms an open end 4 and a short cylinder. It is an area | region between the front-end | tip inner surfaces of the key guide 7 of a shape. Therefore, the plurality of engaging grooves 3 and 3 described above are formed in a streak (straight shape) in the internal space 2.

  By the way, at the practical level, the outer cylinder 1 is fitted into the long cylindrical cylinder 1a having both ends opened and the rear end opening of the long cylindrical cylinder 1a, as shown in FIGS. A cap-shaped lid 1b. With this configuration, the key return spring 31 and the key guide 7 (in the embodiment, divided into two parts) can be easily incorporated into the rear end portion of the outer cylinder 1. After the key return spring 31, the key guide 7, and the like are assembled from the rear end opening of the outer cylinder 1, the cap-like lid 1 b is fitted and the lid 1 b with the plurality of fixing tools 10. Is fixed to the long cylindrical cylindrical body 1a.

(4) Key guide 7
4 is an end view taken along line 4-4 of FIG. As shown in FIG. 4, the short cylindrical key guide 7 engages with one or a plurality of spiral guide grooves 8 or the spiral guide grooves in the center hole 12 corresponding to the center portion of the key insertion assisting tool Z. One of the small protrusions 13 is provided. In the present embodiment, for example, as shown in FIG. 5, since the spiral guide groove 8 is formed on the outer peripheral wall of the rear end portion of the key 11, the single or plural (this embodiment) small protrusions 13 are A short cylindrical key guide 7 is formed.
Therefore, the long key 11 is supported by the outer cylinder 1 through the key guide 7 so as to be retracted and rotatable. In the present embodiment, the key guide 7 is divided into two equal parts as shown in FIG. 9, for example, but it may of course be constituted by “one article”.

  Further, in the present embodiment, the outer cylindrical body 1 and the key guide 7 are separately molded with a hard synthetic resin, and the short cylindrical key guide 7 is fixedly attached to the rear end portion of the long cylindrical outer cylinder that is open at both ends. And the rear end opening of the long cylindrical cylindrical body 1a is closed by the lid 1b. However, the outer cylindrical body 1 and the key guide 7 may be integrally formed in advance. Further, as suggested above, the single or plural spiral guide grooves 8 are formed in the inner peripheral wall forming the central hole 12 of the key guide 7, while the single or plural small protrusions 13 that engage with this are formed. You may form in the rear-end part outer peripheral wall of the elongate key 11. FIG.

(5) Linked body 21
As shown in FIG. 2, the coupling body 21 protrudes from the front end opening 4 of the outer cylindrical body 1 by the spring force of the coupling body return spring 41 and is fixed to a portion near the rear end portion of the key 1 in the initial state. A part of the key 1 is directly or indirectly covered except for the rear end portion having the engaging portion 51 and the spiral guide groove 8 that are provided.

  In other words, the cylindrical coupling body 21 has, for example, a flange-shaped contact portion 24 on the outer peripheral wall of the engagement rear end portion 22 so as not to be detached from the front end opening 4 of the outer cylindrical body 1 in the initial state. The corresponding contact portion 24 is in pressure contact with the stopper portion 5 of the outer cylinder 1.

  In addition, although the connecting body 21 does not capture (couple) the key 1 in the initial state, the inner cylinder is pressed against the periphery b of the key hole a of the lock X and is used for the connecting body as described later. When retracted to a predetermined position against the spring force of the return spring 41, the engagement rear end portion 22 engages (captures) the engagement portion 51 of the key 1.

  As a result, the outer cylindrical body 1, the key 11, and the connecting body 21 are integrally coupled. By the way, although the coupling body 21 indirectly covers a part of the key 11 in the present embodiment, this is not an essential matter of the invention, and depending on the embodiment, it is inserted except for the rear end side. The part (key body) 16 side may be covered substantially entirely. Moreover, the insertion part of the key 11 may protrude from the front end surface of the coupling body 21.

(6) Movable key holder 9
For example, as shown in FIGS. 1, 2, and 10, a cylindrical movable key holding body 9 having a key guide long hole 9 a corresponding to a key hole at a tip portion holds an insertion portion (key body) 16 of a key 11. In this state, it is provided on the distal end side of the cylindrical coupling body 21 so as to rotate together with the key 11. As shown in FIGS. 10A and 10B, the movable key holder 9 is guided to the key guide 7 when the key 11 is pressed against the key hole a of the lock X in a crossed state. If the tip end surface of the cylindrical connecting body 1 is co-rotated while being supported by the inner periphery of the cylindrical connecting body 1 and the front end surface thereof is pressed against the periphery of the keyhole a, in this embodiment, the spring of the connecting body return spring 41 is used. A predetermined amount can be retracted against the force.

  A flange-like engagement portion 9 b that abuts an indefinite stopper provided around the opening tip of the cylindrical coupling body 1 is provided at the insertion inner end of the movable key holder 9. Further, the distal end portion of the movable key holder 9 having the key guide long hole 9a serves as a pair of guide walls for guiding both sides of the flat surface of the insertion portion 16 in a sandwich shape.

(7) Engaging portion 51, connecting body return spring 41, key return spring 31
FIG. 5 is an explanatory view showing the main parts of the key rotation stopping engagement portion 51, the connecting body return spring 41, the key return spring 31, and the like. In this figure, 41 is a return spring for a connecting body, and this return spring 41 for a connecting body is, for example, an inner end portion of the movable key holding body 9 so as to bias the movable key holding body 9 in the protruding direction. It is inserted between the engaging portion 51 provided on the rear end side of the key. In this embodiment, the key rotation stop engaging portion 51 is fixedly provided at a portion near the center or rear end of the key 11. The engaging portion 51 has an elliptical or annular shape, and one or a plurality of engaging teeth 51a are formed on the outer periphery thereof. In addition, the engaging part 51 has a non-round or square-shaped engaging hole in the center part.

  By the way, in the present embodiment, the engaging portion 51 is provided in a hook shape near the rear end of the key 11, and the hook-like engaging portion 51 has at least one engaged tooth or engagement. The artificial tooth 51a is formed.

  In other words, at least one engagement tooth or engaged tooth is formed on the inner peripheral wall of the engagement rear end portion 22 of the cylindrical coupling body 21, while the outer periphery of the engagement portion 51 for stopping the key rotation. On the surface, engaged teeth or engaging teeth 51a are formed that fit into and disengage from the engaging teeth or engaged teeth. Of course, each shape of the hook-like engaging portion 51 and the engaging teeth 51a is a matter that can be arbitrarily changed in design as long as the engaging portion 51 and the key 11 can be integrally engaged and disengaged.

  Further, although not shown in particular, the engagement / disengagement structure between the engagement rear end portion 22 of the cylindrical coupling body 21 and the engagement portion 51 for stopping the rotation of the key is a well-known and well-known clutch mechanism (of the opposing surfaces of the disk body). Unevenness, frictional engagement with a rubber plate, etc.).

  Further, as shown in FIG. 5, for example, the key return spring 31 is formed in a spiral guide groove between the inner surface of the recess formed at the front end portion of the key guide 7 and the rear end surface of the key rotation stopping engagement portion 51. The rear end portion having 8 is disposed so as to be wound. Of course, the arrangement location of the key return spring 31 is merely an example. For example, the inner surface of the rear wall (the lid body in some embodiments) that forms the central hole 12 of the key guide 7 and the rear of the key 11 are used. It may be interposed between the end faces, and the key 11 may always be urged in a protruding direction. The urging force of the key return spring 31 is set to be stronger than that of the connecting body return spring 41 located in front. The wire diameter, the number of turns, the strength, and the like of the key return spring 31 and the connection body return spring 41 are matters that are appropriately set in consideration of the rotation and retraction of the key 11 and the back movement of the connection body 21.

(8) Details of Implementation Level of Key 11 Here, the configuration of the implementation level of the key 11 will be described with reference to FIG. First, reference numeral 15 denotes a shaft constituting the key 11, and a gear-like engagement portion 51 is fixedly engaged with the angular shaft portion of the shaft 15. Reference numeral 16 denotes an insertion portion (key body), and a rear end portion of the key body 16 is provided on the distal end side of the shaft 15 through a slightly thick fixing plate 17 as a key pressing member and a plurality of fixing tools 18. It is fixed. As described above, the two spiral guide grooves 8 and 8 are formed at the rear end portion of the shaft 15, and these spiral guide grooves are formed on the inner peripheral wall of the central hole 12 of the key guide 7. A plurality of small protrusions (engaging portions) 13 are engaged.

  Therefore, when the key 11 is retracted in the axial direction via the key guide means (the small protrusion 13 and the spiral guide groove 8), the key 11 is retracted while rotating. FIG. 12 is an explanatory diagram showing that the key 11 can be rotated.

(9) Procedure / Operation As shown in FIGS. 1 and 2 and the like, in the initial position (normal position during carrying), the cylindrical coupling body 21 causes the movable key holder 9 to move by the spring force of its own return spring 41. Projecting from the front end opening 4 of the outer cylinder 1. The movable key holder 9 protrudes from the opening at the front end of the cylindrical connector 21 by a predetermined amount due to the spring force of the connector return spring 41. Further, the key (key body 16) 11 also protrudes from the distal end opening 4 of the outer cylindrical body 1 through the movable key holding body 9 by the spring force of its own return spring 31. ) The whole is covered with the movable key holding body 9, and the front end surface of the movable key holding body 9 and the front end surface of the insertion portion of the key (key body 16) 11 are substantially at the same position.

  FIG. 10 is an explanatory diagram of the movable key holder 9 when the front end surface of the key is pressed against the edge of the keyhole before the lock. As shown in FIG. 10, for example, when the key 11 holds the outer cylinder 1 and presses the key 11 in the intersecting state with the key hole a of the lock X, the key 11 is guided by the key guide 7 and starts to rotate. At that time, the movable key holding body 9 rotates together with the key 11 while being supported on the inner periphery of the cylindrical coupling body 1.

  FIG. 11 is an explanatory diagram of a halfway state in which the key insertion assisting tool Z is pressed from the initial state of FIG. 2 and the insertion portion 16 of the key 11 begins to enter the keyhole a. FIG. It is explanatory drawing guided (rotated) by the key guide 7 of FIG.

  In the present embodiment, the movable key holder 9 has a tip end surface of the key hole a corresponding to the key 11 entering the key hole a when the key 11 is pressed against the key hole a of the lock X in a crossing state. When pressed against the periphery, it can be retracted by a predetermined amount against the spring force of the return spring 41 for the connecting body. Here, the operation of the key 11 will be described with reference to FIG.

  If the distal end surface of the insertion portion of the key 11 does not match the keyhole a, for example, the distal end surface of the insertion portion 16 intersects the keyhole a in the horizontal or vertical direction, specifically 45 degrees, 50 degrees, and 90 degrees. In this case, when the outer cylinder 1 is pressed in the direction of arrow A, the distal end surface of the insertion portion 16 of the key 11 comes into pressure contact with the edge of the key hole a, so that the key 11 is the key guide 7 of the outer cylinder 1. And retreats in the direction of arrow B while rotating in the direction of arrow C. When the insertion portion 16 of the key 11 enters the key hole a, the movable key holder 9 moves backward by a predetermined amount against the spring force of the connecting body return spring 41 as described above.

  Then, the front end surface of the coupling body 21 hits the periphery b of the key hole a of the lock X. When the key insertion aid Z is further pressed, the connecting body 21 is immersed into the outer cylindrical body 1 against the spring force of its own return spring 41. On the other hand, the insertion portion of the key 11 enters the keyhole a as it is in response to the backward movement of the coupling body 21 (at this time, the key does not rotate).

  FIG. 13 is an explanatory diagram in which the rear end portion of the coupling body 21 is engaged with the engaging portion 51 of the key 11 in a fitted state. First, the tip surface of the insertion portion of the key 11 rotates together with the movable key holder 9 while being pressed against the edge portion of the key hole a, and then, when the angle of the key 11 and the angle of the key hole a completely coincide with each other, Eventually, the insertion portion of the key 11 enters the key hole a, and at the same time, the cylindrical movable key holder 9 and the cylindrical coupling body 21 enter the contracted state in the outer cylinder 1. In this contracted state, as shown in FIG. 13, the engagement rear end 22 of the connecting body 21 engages with the engaging part 51 of the key 11, and the outer cylinder 1, the connecting body 21, and the key 11 are respectively connected. Connect together.

  FIG. 15 is an explanatory diagram showing that the connecting body 21, the key 11, and the outer cylinder 1 can be rotated together. At the time of engagement (coupling), the connecting body 21 and the key 11 engage with each other as the engaging portion and the engaged portion, and the connecting body 21 and the outer cylinder 1 are guided by the guide means (the streaky engaging grooves 3 and the engaging portions). Since they are integrally engaged via the mating protrusions 23), the outer cylinder 1 can be held and operated in the application / unlocking direction.

  In the examples shown in the embodiment of the invention, it has been explained that the connecting body 21 is a cylindrical body, but the shape is not necessarily limited to a complete cylindrical body. It is sufficient that the connecting body 21 moves backward in a non-rotating state and engages with the engaging portion (engaging portion) 51 of the key 11 (switch function or capture engagement function with respect to the outer cylinder). Therefore, the design of the form can be arbitrarily changed without departing from the object of the invention. For example, in order to avoid the present invention, the design of the coupling body 21 is changed to a U-shaped cross section, a C-shape, etc., and the tip of the coupling body 21 is pressed against a part b around the key hole of the key hole a of the lock X. Even if configured as such, the essential matters of the invention do not change.

  Further, as in the second embodiment of FIGS. 19 and 20, the design of the coupling body 21 and the like is changed, and for example, the movable key holding body 9A is provided to rotate at a predetermined position at the distal end portion of the cylindrical coupling body. Also good. If comprised in this way, since only one inner cylinder is sufficient, the key insertion auxiliary tool Z can be reduced in size.

  Furthermore, FIG. 21 is a schematic explanatory diagram of a third embodiment in which a part of the first embodiment is redesigned. In the third embodiment, in the second embodiment in which the movable key holding body 9B is fitted to the distal end portion of the cylindrical coupling body 21 so as to be rotatable and retractable, the coupling body return spring 41 is an outer cylinder. The return spring 35 for the movable key holding body is housed in the movable key holding body 9 having a spring end support portion 36 separately from the return spring 41 for the connecting body. Thus, even if the design is changed such as increasing the number of spring members or changing the location of the spring members, the invention is substantially the same.

  The present invention is mainly used in the locksmith and joinery industries.

X ... lock, a ... key hole, b ... surrounding the key hole, Y ... door, Z ... key insertion aid, 1 ... outer cylinder, 2 ... inner space, 3 ... guide means (engagement groove), 4 ... tip opening 5 ... Stopper portion, 7 ... Key guide, 8 ... Guide means (helical guide groove), 9, 9A, 9B ... Movable key holder, 11 ... Key, 12 ... Center hole, 13 ... Small protrusion, DESCRIPTION OF SYMBOLS 15 ... Shaft, 16 ... Key main body, 21 ... Connection body (inner cylinder), 22 ... Internal space, 23 ... Guide means (engagement protrusion), 24 ... Contact part, 31 ... Return spring for keys, 41 ... Connection Body return spring, 51... Engaging portion for key rotation stop, 51 a.

Claims (5)

A key supported by the outer cylinder through a key guide so as to move backward and rotatably, and engages with the outer cylinder through a guide means so as to be able to move backward in a non-rotating state and from a front end opening of the outer cylinder A connecting body that protrudes, a key return spring that constantly urges the key in the protruding direction, and a connection body return spring that always urges the connecting body in the protruding direction. A movable key holder that rotates together with the key while holding the insertion part of the key is provided, and an engagement portion for stopping the rotation of the key is provided on the rear end side of the key so that the key crosses the key hole of the lock. When it is guided and rotated by the key guide during pressure contact, the movable key holder also rotates together with the key while being supported by the coupling body, and the coupling body surrounds (including part of) the keyhole in the lock. While being pushed back, it retracts to the specified position and the key insertion part is completely in the keyhole. When entered, the joint member engaged with the outer cylinder and the coupling member and the key is the key insertion aid for padlock portable integrally coupled respectively engaging a rear end portion to the engagement portion of the. 2. The movable key holding body according to claim 1, wherein the movable key holding body is provided so as to rotate at a predetermined position at a front end portion of the connecting body or is fitted to the front end portion of the connecting body so as to be rotatable and retractable. A portable key insertion aid for a lock, characterized in that 3. When the movable key holding body is fitted to the front end of the coupling body so as to be rotatable and retractable, the coupling body return spring is incorporated in the outer cylinder. A portable key insertion assisting device for a lock, wherein the return spring for the movable key holding body is housed in the connection body separately from the return spring for the connection body. 2. The portable key insertion aid for a lock according to claim 1, wherein the key insertion portion is a flat blank key that does not have a plurality of notches on both side edges. 2. The portable type according to claim 1, wherein the outer cylindrical body includes a long cylindrical cylindrical body having openings at both ends, and a cap-shaped lid body fitted to the rear end opening of the long cylindrical cylindrical body. Key insertion aid for locks.

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