Portable device with electronic key system and mechanical key system having downsized structure

Abstract

A portable device is constructed with an emergency key and a device body having a receiving part. The emergency key has a lock mechanism constructed with a holding member and a button urged by the holding member to be protruded from the emergency key. The device body has a first holding hole engaging with the button when the emergency key is received in the receiving part. When the button is pushed, the emergency key can be pulled out of the receiving part. The emergency key is inserted into the receiving part, so that the button engages with the hole. The emergency key has the lock mechanism, so that the electronic key system is downsized.

What is claimed is:  
     
         1 . A portable device for an entrance system which is locked and unlocked electronically or mechanically, the portable device comprising: 
 a key for mechanically engaging with the entrance system in order to lock and unlock the entrance system;    a device body for electrically instructing locking and unlocking the entrance system and having a receiving part for receiving the key therein; and    a lock mechanism that detachably holds the key in the receiving part,    wherein the key has at least a part of the lock mechanism.    
     
     
         2 . A portable device according to  claim 1 , wherein: 
 the key has an elongated key part on one longitudinal end side of the key for mechanically engaging with the entrance system;    the receiving part of the device body detachably receives at least one of the longitudinally end side of the key, on which the key part is located, and the other longitudinally end side of the key which is longitudinally opposite to the key part; and    when the key is received in the receiving part from the longitudinally end side opposite to the key part by a predetermined length, the key part protrudes from the device body.    
     
     
         3 . A portable device according to  claim 1 , wherein: 
 the key has an elongated key part on one longitudinal end side of key for mechanically engaging with the entrance system;    the lock mechanism includes: 
 a button part that is provided longitudinally separate from the key part to outwardly protrude from a side face of the key, wherein the button part is displaced from a reference position in which the button part is at least partially outwardly protruded from the side face of the key to a position in which the button part is not outwardly protruded from the side face of the key, when the button part is pushed from an outside of the key to an inside of the key; and  
 a holding member that supports the button part, wherein the holding member resiliently biases the button part to be in the reference position when the button part is pushed from the outside of the key to the inside of the key; and  
   the device body defines a first holding hole that engages with the button part of the key when the key is at least partially received in the receiving part of the device body.    
     
     
         4 . A portable device according to  claim 3 , wherein: 
 the receiving part of the device body detachably receives at least one of the longitudinally end side of the key, on which the key part is located, and the other longitudinally end side of the key which is longitudinally opposite to the key part; and    when the key is received in the receiving part from the longitudinally end side opposite to the key part by a predetermined length, the button part of the key engages with the first holding hole of the device body, and the key part protrudes from the device body.    
     
     
         5 . A portable device according to  claim 4 , wherein: 
 the device body defines: 
 a first opening that is connected to the receiving part;  
 a second opening, which is connected to the receiving part, on an opposite side as the first opening with respect to the receiving part; and  
 a second holding hole that is located in the same plane as a plane defining the first holding hole,  
   wherein the second holding hole engages with the button part of the key when the key, which is inserted from the first opening into the receiving part of the device body, is in a position in which the key part of the key at least partially protrudes from the second opening of the device body.    
     
     
         6 . A portable device according to  claim 5 , wherein: 
 the device body defines a slit that connects the first holding hole and the second holding hole; and    the button part of the key has a protrusion which slidably protrudes from the slit of the device body when the protrusion is in a position between the first holding hole and the second holding hole.    
     
     
         7 . A portable device according to  claim 3 , wherein the device body has a biasing member in the receiving part for biasing the key in a direction in which the key is displaced from the receiving part when the key is received in the receiving part and the button part engages with the first holding hole.  
     
     
         8 . A portable device according to  claim 1 , wherein at least a key body of the key is made of a resinous material.  
     
     
         9 . A portable device according to  claim 2 , wherein the key part defines a recession shaped in an elongated groove to be engaged with the entrance system.  
     
     
         10 . A portable device according to  claim 2 , wherein the key part defines a recession shaped in a pit to be engaged with the entrance system.