JP6182337B2 - Portable key - Google Patents

Description

    The present invention relates to a portable key that can be used for locking and unlocking a door of a building.

    Patent Document 1 relates to a portable key. This type of portable key includes a flat key head formed of a synthetic resin material and a metal key blade attached integrally to the key head. In use, the key blade is pulled out from the recessed storage portion formed on the side wall portion of the key head, or pops out from the recessed storage portion by a jumping mechanism including a biasing spring and protrudes to the use position. To do.

    The key blade has a structure in which the key blade is slid as it is from the key case storage portion to the use position. In any case, the key blade protrudes in the longitudinal direction of the compact type key head so as to be orthogonal to the tip surface of the tip of the key head when inserted into the key hole of the lock, and this protruding position is referred to as a “neutral position ( Use position) ”.

    However, since the mechanical key of Patent Document 1 is not a mechanical key that is used on a daily basis, it is unsuitable for use in a keyhole for a lock provided on a front door of a joinery, for example.

This is because these known mechanical keys are not devised to release the load when an excessive load is applied to the key blade through the handle during use.
There are various types of door locks as joinery, and among these, there are "electric locks" that can be unlocked both mechanically and electrically. There are various types of electric locks, but there are also those in which the spring force of the spring member that pushes back the dead bolt is always acting when unlocking the electric lock with the mechanical key.

    In addition, there is no problem if the portable key is used exclusively to switch the engine of the vehicle, but compared to this, it is used for locks for joinery that have a strong spring force to urge the dead bolt in the locking direction. In order to do this, it is desirable to release an excessive load applied to the key blade through the handle while maintaining the “neutral position (use position)” of the portable key. For example, when a large operating force is applied to the key blade through the handle, for example, the fitting inner peripheral surface (joint surface) of the base end of the key and the outer peripheral surface of the cylindrical support shaft formed on the inner surface of the handle (joint) This is because there is a possibility that the leading edge of the surface and the key at the tip of the handle formed on the synthetic resin material may be damaged or damaged. Therefore, the present invention has appeared to solve such problems.

Patent Documents 2 to 4 relate to a “pop-up portable key”. For example, Patent Document 4 discloses a cylindrical shape having a split groove at the tip of a base body (lower case) 29 constituting a handle. A support shaft 27b is formed, a coil spring 42 and an operation button 41 are incorporated in the cylindrical support shaft, and a support hole (fitting hole) 48 for a base end portion (head portion) 16 of the key is formed in the cylindrical support shaft. There is a description of matters that are fitted outside, a torsion spring 50 for popping out a key is incorporated into the support hole 48, and a clamping member 28 that supports the key is provided on the cover 30 side (reference numeral 4 ). .

JP 2006-249875 A Japanese Patent No. 38866692 Special table 2012-501392 Japanese Patent No. 4667376

    The intended object of the present invention is to insert the handle into the keyhole of the cylinder lock before the joinery lock and unlock it, even if the handle and the key body are joined (for example, the handle fixed support shaft, the support cylinder and the key body cylinder). It is to provide a portable key in which the joint portion of the base end portion is not damaged. In addition, when the key body protrudes and a load exceeding the limit is applied at the neutral position, the key body tilts from the neutral position of the handle. The second purpose is to obtain advantages such as easy combination, effective use of the space at the tip of the handle, reduction in the number of components, and simplification of the key body. is there. The third object is to improve the operability by operating the operation button so that the key body protrudes outward from the handle.

The portable key of the present invention is provided with a handle and a tip end surface of the handle from a key storage portion formed on one side wall of the handle and rotatably provided at the tip end of the handle via a fixed support shaft. In a portable key consisting of a key body that rotates to a use position that is substantially orthogonal to the key and that is inserted into the keyhole of a cylinder lock before the lock for use in use, A support cylinder provided with a spring member, the upper end of which is fitted to the through hole of the handle whose coaxial part is positioned coaxially with the fixed support shaft, and the spring button is fitted to the spring member. Is inserted into the cylindrical base end portion of the key body, and a holding spring member for a neutral position of the key body, the end portions of which are connected to the cylindrical base end portion and the support cylinder, is wound around the support cylinder, When the key body protrudes, the key body Rotates to the use position to the distal end surface substantially perpendicular to the handle by a force, when operating by turning the hand該把, the set torque value of the retention coefficient of the retaining spring member, and the fixed support shaft and the support cylinder The key body tilts against the spring force of the holding spring member when a load exceeding the set torque value is applied to the joint portion of the cylindrical base end portion.

    The portable key of the present invention is a portable key comprising a handle and a key body that is rotatably provided at the tip of the handle via a fixed support shaft and that is inserted into a keyhole of a cylinder lock before the lock for use in use. In the key, a spring member for returning the key body and returning the operation button is provided on the fixed support shaft, and the operation button fitted into the through-hole of the handle whose upper end portion is coaxially positioned with the fixed support shaft. A support cylinder that fits into the spring member and cooperates with the operation button is inserted into the cylindrical base end portion of the key body, and the cylindrical base end portion of the key body and the support cylinder are normally polarized. The magnetic bodies that are attracted to each other are fixedly provided, and when the key body protrudes, the key body is rotated to a use position substantially orthogonal to the front end surface of the handle by the spring force of the spring member, and the handle is turned. When operating the magnetic body When a load exceeding the attracting force is applied to the joint portion of the fixed support shaft or the support cylinder 11 and the cylindrical base end with respect to the applied force, the key body tilts due to the separation of the magnetic bodies. It is characterized by.

    Here, the “substantially” used position that is substantially orthogonal to the front end surface of the handle is an approximate meaning, and includes, for example, a case where some + α rotation angle is added.

(A) The invention according to claim 1 and claim 4 is provided at the tip of the handle so as to be rotatable via a fixed support shaft, and from the key storage portion formed on one side wall of the handle. In a portable key comprising a key body that rotates to a use position that is substantially perpendicular to the front end surface of the handle and that is inserted into a keyhole of a cylinder lock of a joinery lock during use. Insertion and unlocking operations do not damage the joint between the handle and key body. In other words, the key body supported by the fixed shaft can be tilted, for example, in the left-right direction with respect to an excessive load applied to the key body.
(B) The constituent members can be easily combined around one axis that pivotally supports the key body. Moreover, since each member was provided centering on one axis | shaft, the space of the front-end | tip part of a handle can be utilized effectively. Further, since the means for connecting the support cylinder and the cylindrical base end portion of the key body is a holding spring member or a magnetic body, the number of components can be reduced. Furthermore, the key body can be simplified.
(C) The inventions according to claims 2, 3 and 5 can reliably obtain the effects (a) and (b).

1 to 15 are explanatory views showing a first embodiment of the present invention. 16 to 19 are explanatory diagrams showing a second embodiment of the present invention.
The perspective view of the state which the key main body which comprises a portable key rotated to the use (neutral) position. The right side view of the state where the key body is in the storage position. In FIG. 2, it is explanatory drawing seen from the front-end | tip part side of the portable handle. FIG. 4 is a schematic sectional view taken along line 4-4 in FIG. 1 (including an enlarged schematic sectional view of a main part). FIG. 5 is a schematic sectional view taken along line 5-5 in FIG. 1 (including an enlarged schematic sectional view of a main part). The exploded perspective view of the principal part. The perspective view of the principal part (a spring member, an operation button, etc.). The perspective view of the principal part (an operation button, the cylindrical base end part of a key main body, a holding spring member, a support cylinder). Schematic explanatory drawing of the decomposition | disassembly state from the planar view of the principal part (The cylindrical base end part of a key main body, a holding spring member, a support cylinder) (The schematic diagram which accumulated each member is also included). The schematic explanatory drawing from the planar view of the principal part (shows the shaking state in the left-right direction from the neutral position). Explanatory drawing of the storage position of a key main body. Explanatory drawing of the state which the key body rotated to the use position. Explanatory drawing in which holding force was cancelled | released on the left side. Explanatory drawing in which holding force was cancelled | released on the right side. Explanatory drawing used for locking and unlocking the door of the building. The exploded perspective view similar to FIG. 6 of 2nd Embodiment. FIG. 10 is a schematic explanatory view similar to FIG. 9 (including schematic views in which each member is overlapped). Explanatory drawing in which adsorption power was canceled on the left side. Explanatory drawing by which the adsorption | suction force was cancelled | released on the right side.

    The portable key X according to the first embodiment will be described with reference to FIGS. 1 is a perspective view of a state in which the key body 2 constituting the portable key X is rotated to a use (neutral) position, FIG. 2 is a right side view of the key body 2 in the storage position, and FIG. In FIG. 2, it is explanatory drawing seen from the front-end | tip part side of the portable handle 1. FIG.

    Here, each part will be briefly described with reference to FIG. Reference numeral 1 denotes a portable handle (hereinafter referred to as “grip”), 1a denotes a tip portion thereof, and 1b denotes a rear end portion thereof. 2 is a key body. The key body 2 includes a key holder 3 having a cylindrical base end portion 3a and a square fitting support portion 3b formed continuously with the cylindrical base end portion 3a, and the fitting support portion. It consists of a long plate-like blade portion 4 inserted and fixed to 3b.

The key body 2 of the embodiment has a simple form including a key holder 3 and a blade portion 4 fixed to the key holder 3 through an unfixed fixing tool as shown in FIG.
As will be described later, the key body 2 is pivotally supported on the fixed shaft 5 via a support cylinder 11 incorporated in the cylindrical base end 3a, and an operation button 6 fitted into the support cylinder 11 and the through hole 17 of the handle 1. A spring member 10 is interposed between the operation button 6 and the fixed shaft 5.

    In addition, 5 is one fixed support shaft (bearing portion) in which the seat plate portion 5 a is fixed to the eccentric portion of the distal end portion 1 a of the handle 1, and 6 is the cylindrical base end of the through hole 17 of the handle 1 or the key holder 3. A cap-shaped operation button 7 incorporated in the portion 3 a and a key storage portion 7 formed on the side wall of the handle 1.

    Here, the main part of the present invention will be described. The portable key X is rotatably provided via a handle 1 and a fixed support shaft 5 as one axis of the tip 1a of the handle 1, and when used, a key hole 40a (see FIG. 15) of a cylinder lock 40 used as a lock for joinery. And a key body 2 to be inserted into the reference).

    Thus, a spring member 10 for returning the key and returning the operation button is provided on the fixed support shaft 5, and the upper end of the spring member 10 is fitted into the circular through hole 17 of the handle 1 coaxially positioned with the fixed support shaft 5. The operation button 6 is fitted into the spring member 10, and the support cylinder 11 cooperating with the operation button 6 is inserted into the cylindrical base end portion 3 a of the key body 2. A holding spring member 9 for a key body neutral position, whose both ends are connected to the base end portion 3a and the support cylinder 11, is wound around the support cylinder 11, and when the key body 2 protrudes, the key body 2 is connected to the spring member 10. When the handle 1 is rotated and operated by rotating the handle 1 by the spring force of the handle 1, the fixed support Joint portion of shaft 5 or support cylinder 11 and cylindrical base end 3a When load is applied that exceeds the set torque value, the key body 2 is tilted in the left or right direction against the spring force of the retaining spring member 9.

    4 to 9 are schematic descriptions showing the main parts of the present invention. In particular, FIG. 8 shows the essentials of the operation button 6, the cylindrical base end 3a of the key body 2, the holding spring member 9, and the support cylinder 11. It is a perspective view which shows a part. 4 and 5 each include an enlarged schematic cross-sectional view of the main part.

    For example, referring to FIGS. 6 and 7, the fixed support shaft 5 includes a seat plate portion 5a fixed to the upper surface of the base body 12 of the handle 1, and a short columnar shaft portion positioned at the center of the seat plate portion 5a. 5b, and a small protrusion-like stopper 5c is provided on a concentric circle of the short columnar shaft portion 5b of the seat plate portion 5a. The small protrusion-like stopper 5c is for reliably stopping the key body 2 rotated to the use position substantially orthogonal to the distal end surface 1a of the handle 1 at the neutral position by the spring force of the spring member 10. Further, the spring member 10 employs a “torsion spring”, and as shown in FIGS. 4 and 5, the lower end side is wound around the short columnar shaft portion 5 b, and the upper end side from the portion near the lower end is a cap-like operation. The button 6 is equipped.

    By the way, in this type of portable key, in general, a key (key body) is generally rotated from a recessed storage portion on a side wall of a handle (case) via a fixed support shaft (a bearing portion regardless of form). The lever is pushed out by the urging force of the urging means up to a position orthogonal to the tip end surface of the handle, and is engaged so that it cannot swing left and right by the locking means of the male / female formed on the base end of the key or the tip of the handle and the spindle (For example, FIG. 1 of JP-A-63-110377 and FIG. 1 of JP-T-2012-501392).

    Therefore, in this embodiment, as described above, a torsion spring as an example of the spring member 10 is disposed on the fixed shaft 5 as one axis, and this torsion spring 10 has a function and a key for returning the operation button to the initial position. The main body 2 is also used for both functions of popping out the key storage portion 7 of the handle 1, and its upper end is locked in the locking groove 6a of the operation button 6, and its lower end is fixed on the fixed support shaft 5 or stopper 5c of the base 12. Are inserted and fixed appropriately.

    Accordingly, in operation, when the operation button 6 is pushed in the direction of the base body 12 against the spring force of the torsion spring 10, the operation is released from the locked portion 17a of the lid 13 of the handle 1. The button 6 rotates outwardly by the spring force of the torsion spring 10, and at the same time, the key holder 3 also rotates together through the support tube 11 and the holding spring member 9 (the key body 2 automatically pops out). .

    Thus, the portable key X from which the key body (key) 2 pops out is also referred to as a “pop-up key”. The operation button 6 of the embodiment has an internal locking portion 6a, an external vertical engagement portion 6b, a protruding contact portion 6c, and the like, and exhibits a plurality of functions.

    In addition, this type of portable key is generally fitted into a cylindrical support shaft or a bearing ring formed at the base end of the key, and a cap-shaped operation button is pushed in the axial direction (for example, Japanese Patent Application Laid-Open No. Sho-sho). 63-110377), the engagement projection on the operation button side is released from the locking portion on the key side, and as a result, the key pops out from the housing portion of the case by the restoring force of the compression spring incorporated in the cylindrical support shaft or the like. In this embodiment, as shown in FIGS. 4, 5, 6, 7, etc., the fixed support shaft 5 and the operation button 6 are provided with a spring member 10 for an operation button key. ing.

Therefore, when the operation button 6 is pushed against the spring force of the spring member 10, the engagement portion 6 b outside the operation button 6 is disengaged from the engaged portion 17 a of the lid body 13, and then the torsion spring force As a result, the key body 2 pops out of the recessed storage portion 7 of the handle 1.
Next, in the present embodiment, in addition to the spring member (torsion spring) 10, “another spring member” is disposed on the fixed shaft 5 as one axis via the support cylinder 11. It is a holding spring member 9 that always holds the key body 4 in the neutral position.

    The holding spring member 9 has a function of connecting the support cylinder 11 and the cylindrical base end 3 a of the key body 2. That is, for example, as shown in FIG. 8, the support cylinder 11 is connected to the flange base portion 3a and a flange portion 11a facing one end surface of the cylindrical base end portion 3a. An operation button guide tube portion 11b to be inserted, and the holding spring member 9 for the key body neutral position has one end portion (lower end portion) 9a thereof, so that the support tube 11 and the key body 2 work together. It is attached to one end face of the cylindrical base end portion, while the other end portion (upper end portion) 9b is attached to the flange portion.

    Thus, when the key body 4 protrudes, the key body 4 protrudes from the key storage portion 7 together with the operation button 6 and the support cylinder 11 around the fixed support 5 to the use position by the spring force of the spring member 10. Rotate. In the embodiment, when the key body 4 is rotated to the use position, the operation button 6 and the support cylinder 11 are prevented from further rotation directly or indirectly by the stopper 5c.

    Therefore, when the key body 4 is inserted into the key hole 40 a and the handle 1 is turned, the fixed support shaft 5 or the support cylinder 11 and the key holder 3 are joined to the set torque value of the holding coefficient of the holding spring member 9. When a load exceeding the set torque value is applied to the key body 4, the key body 4 tilts in either the left or right direction against the spring force of the holding spring member 9 (see FIGS. 10 to 14).

    Here, with reference to FIG. 11 thru | or FIG. 14, the matter relevant to the principal part of this invention is demonstrated. FIG. 11 is an explanatory diagram of the storage position of the key body 2. When the key body 2 is accommodated in the key accommodating portion 7 of the handle 1, for example, one or a plurality of engaging portions 6 b projecting in the vertical direction on the outer peripheral surface of the operation button 6 and the circular through hole 17 of the lid 13. The key main body 2 is set in the recessed storage portion 7 so as not to jump out freely due to the engagement structure with the engaged portion (for example, restraining groove) 17a formed on the peripheral wall.

    Here, for convenience of explanation, FIG. 11 is a front view. In FIG. 11, all key bodies 2 are located in the base body 12. The fixed support shaft 5 is visible on the right side of the drawing. On the other hand, FIG. 12 is an explanatory view showing a state in which the key body 2 is rotated to the use position. FIG. 10 is a schematic explanatory view of the main part from a plan view, and shows a state where it swings from the neutral position to either the left or right direction. As is apparent from these drawings, when the key body 4 is protruded, the key body 4 is rotated to a use position orthogonal to the front end surface of the handle 1, and the holding coefficient of the holding spring member 9 is turned when the handle 1 is turned. For example, when a load exceeding the set torque value is applied to the joint portion between the fixed support shaft 5 and the key body 4, the key body 4 is either left or right against the spring force of the holding spring member 9. Tilt in the direction of. As described above, in this embodiment, the key body 2 returns to the neutral position by the spring force of the one holding spring member 9 even if the key body 2 is tilted in the left or right direction from the neutral position.

    As shown in FIG. 15, the portable key X of this embodiment mainly has a blade portion as a mechanical key in a key hole 40 a of a cylinder lock 40 of a lock 39 provided at a free end portion 38 a of a door 38 as a fitting. Used when 4 is inserted. At that time, when a large operating force is applied to the key body 2 via the handle 1, the proximal end portion of the key, in this embodiment, the fitting inner peripheral surface (joint surface) of the cylindrical proximal end portion 3 a of the key holder 3. And the support cylinder 11 and the outer peripheral surface (joint surface) of the fixed support shaft 5 of the handle 1, and the tip of the outer surface of the cylindrical base end 3a of the key holder 3 of the tip 1a of the handle 1 formed of a synthetic resin material. The edges may be damaged or may be damaged. Therefore, the present invention has appeared to solve such problems.

    Explain other matters. For example, as shown in FIG. 6, the handle 1 includes, for example, a base body (lower case) 12 and a lid that is combined with the base body 12 so as to overlap with the base body 12 via fixing means (for example, one or a plurality of fixing tools) not shown. It consists of a body (upper case) 13. The handle 1 may be a simple flat base or a flat case with a built-in electronic circuit (transporter) including an electronic authentication exchange means for the lock control device of the lock 39 on the door 38 side. Also good.

    In this embodiment, in order to incorporate a transporter (not shown), an electronic circuit is accommodated in a recess 14 surrounded by a projecting wall-shaped peripheral wall 12 a formed on the inner surface of the base body 12. For this purpose, the fixed support shaft 5 is formed so as to protrude at an eccentric position on the inner surface of the distal end portion of the base body 12.

    In addition, the fixed support shaft 5 is provided at a position on the right side that is eccentric with respect to a center line passing through the center of the handle 1 (base body 12). Reference numeral 5 c denotes a spring end support portion or a stopper portion that is provided in the immediate vicinity of the fixed support shaft 5 of the handle 1 and fixes the end portion of the spring member 10. The spring end support portion 5c can receive a small protruding contact portion 6c that protrudes in the horizontal direction at the lower end portion of the operation button 6 shown in FIG. The description of the remaining details of the base body 12 is omitted.

    A circular through hole 17 for the operation button 6 is formed at the tip of the oval lid (upper case) 13, and the circular through hole 17 is formed coaxially with the fixed support shaft 5. FIG. 6 shows the disassembled state of the key body 2. The key body 2 of the present embodiment is a replaceable key part for the handle 1. When the key body 2 is combined, the lower end portion of the fitting hole 25 of the cylindrical base end portion 3 a is externally fitted to the circular seat plate portion 5 a of the fixed support shaft 5 of the base body 12. When the key body 2 is mounted on the fixed support shaft 5, the key body 2 can rotate about the fixed support shaft 5. Although the cylindrical base end portion 3a of the key body 2 is connected to the support cylinder 11 via the holding spring member 10, the holding spring member 10 is an example, and the design can be arbitrarily changed. The support cylinder 11 is formed with an unnumbered vertical engagement groove on the inner peripheral wall, and the vertical engagement portion 6b of the operation button 6 is engaged with the vertical engagement groove. Accordingly, the support cylinder 11 cooperates with the operation button 6.

The present embodiment is a “pop-up portable key” as described in Patent Documents 2 to 4 , but this embodiment is also preferably a pop-up portable key. Further, the present invention can be applied regardless of whether or not an electronic circuit (transporter) including an electronic authentication exchange means for the lock control device of the lock 39 on the door 38 side is incorporated.

    Next, a second embodiment will be described with reference to FIGS. In the description of the second embodiment, the same parts as those in the first embodiment are denoted by the same or similar reference numerals, and redundant descriptions are omitted.

    The second embodiment is mainly different from the first embodiment in that a magnetic body is used instead of the holding spring member 9.

    That is, the support cylinder 11 includes a flange portion 11a that faces one end surface of the cylindrical base end portion 3a, and an operation button guide cylinder portion 11b that is connected to the flange base portion and is fitted into the cylindrical base end portion 3a. However, in the second embodiment, in the normal state where a load exceeding the attractive force is not applied, the first magnetic body is formed on the inner surface of the flange portion 11a so that the support cylinder and the key body cooperate together. 50 is fixedly provided, and on the other hand, a second magnetic body 51 adsorbing corresponding to the polarity of the first magnetic body 50 is fixedly provided on one end surface of the cylindrical base end portion 3a facing the inner surface. Yes.

    Therefore, in the second embodiment, when the key body 2 is projected, the key body 2 is rotated to a use position substantially orthogonal to the tip surface 1a of the handle 1 by the spring force of the spring member 10, and the handle 1 is turned. When operating, if a load exceeding the adsorption force is applied to the joint portion of the cylindrical base end portion 3a of the fixed support shaft 5 or the support cylinder 11 and the key body 2 with respect to the adsorption force of the magnetic bodies 50 and 51, The key body 2 tilts when the magnetic members 50 and 51 are separated. Even with this configuration, the intended object of the present invention can be achieved.

    The present invention can be used when locking and unlocking a door of a building.

X ... portable key body, 1 ... portable handle, 1a tip, 2 ... key body, 3 ... key holder, 3a ... cylindrical base end portion, 3b ... square fitting support portion, 4 ... blade portion, 5 ... Fixed support shaft, 6 ... operation buttons, 9 ... holding spring member, 10 ... spring member, 11 ... support cylinder, 12 ... base body, 13 ... lid body, 40a ... keyhole, 50, 51 ... magnetic body.

Claims (5)

A handle and a tip of the handle are rotatably provided via a fixed support shaft, and rotate from a key storage portion formed on one side wall of the handle to a use position substantially orthogonal to the tip of the handle. And a portable key comprising a key body that is inserted into a keyhole of a cylinder lock of a lock for use when used,
A spring member for protruding the key body and returning the operation button is provided on the fixed support shaft, and the operation button that fits in the through hole of the handle whose upper end portion is coaxial with the fixed support shaft is fitted to the spring member. In addition, a support cylinder that cooperates with the operation button is inserted into the cylindrical base end portion of the key body, and the key base neutral position is connected to the cylindrical base end portion and the support cylinder. Is wound around the support cylinder,
When the projection of the key body, said key body is rotated to the use position to the distal end surface substantially perpendicular to the handle by a spring force of said spring member, when operated by turning the hand該把, retention factor of the retaining spring member When a load exceeding the set torque value is applied to the joint portion of the fixed support shaft or the support cylinder and the cylindrical base end portion with respect to the set torque value of the key body, the key body is subjected to the spring force of the holding spring member. A portable key characterized by tilting against it.
2. The portable key according to claim 1, wherein the support cylinder includes a flange portion facing one end face of the cylindrical base end portion, and an operation button that is continuous with the flange portion and is fitted into the cylindrical base end portion. The holding spring member for the key body neutral position is attached to one end surface of the cylindrical base end portion so that the support cylinder and the key body work together. The portable key is characterized in that the other end is attached to the flange portion.
The portable key according to claim 1, wherein a stopper is provided on the fixed support shaft, and when the operation button is released from the engaged portion of the handle by the push and is rotated to the use position by the spring force of the spring member, the operation is performed. The portable key is characterized in that the button and the support cylinder are prevented from rotating further directly or indirectly by the stopper.
A portable key comprising a handle and a key body that is rotatably provided at a tip end portion of the handle via a fixed support shaft and is inserted into a keyhole of a cylinder lock in front of the lock for use in use. Provided with a spring member for popping out the key body and returning the operation button, and fitting the operation button fitted into the through hole of the handle whose upper end portion is coaxial with the fixed support shaft into the spring member, The support cylinder that cooperates with the operation button is inserted into the cylindrical base end portion of the key body, and the magnetic bodies that are normally attracted to each other by the polarity are fixed to the cylindrical base end portion of the key body and the support cylinder, respectively. When the key body protrudes, the key body rotates to a use position substantially orthogonal to the front end surface of the handle by the spring force of the spring member. The fixed support And when the load exceeding the adsorptive force to the joint portion between the support tube the cylindrical base end portion is applied, the key body, the portable key, characterized by tilting by the magnetic comrades leaves.
5. The portable key according to claim 4 , wherein the support cylinder includes a flange portion facing one end surface of the cylindrical base end portion, and an operation button that is continuous with the flange portion and is fitted into the cylindrical base end portion. The magnetic body is provided on the inner surface of the flange portion and one end surface of the cylindrical base end facing the inner surface so that the support tube and the key body work together. A portable key characterized by

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