Commodity sales data processing apparatus

1. A commodity sales data processing apparatus, comprising:

a portable data processing terminal having a first connector and a touch panel;

a docking station having a second connector which connects to the first connector and feeds power to the data processing terminal, when the data processing terminal is connected to the docking station;

a connection mechanism which connects the data processing terminal and the docking station in a separable state; and

a lock mechanism which locks connection by the connection mechanism, so as to make the connection by the connection mechanism from in the separable state to in an inseparable state, and releases locking of the connection by the connection mechanism when a specific key operation is performed.

2. The commodity sales data processing apparatus according to claim 1 , wherein:

the touch panel is provided on a surface of the data processing terminal;

the docking station has a placing surface on which the data processing terminal is placed, while the placing surface contacts a rear surface of the data processing terminal that is an opposite side of the surface; and

the connection mechanism connects the data processing terminal placed on the placing surface to the docking station in the separable state.

3. The commodity sales data processing apparatus according to claim 1 , wherein the connection mechanism includes;

an engagement hole provided in the data processing terminal; and

a hook provided on the docking station which enters into the engagement hole to engage with the engagement hole.

4. The commodity sales data processing apparatus according to claim 3 , wherein:

the hook is provided on the docking station movably in a direction to engage with the engagement hole and in a direction to disengage from the engagement hole.

5. The commodity sales data processing apparatus according to claim 3 , wherein:

the hook includes a locking portion formed at a tip side of the hook, and a step portion formed at a base end side of the hook; and

the locking portion enters into the engagement hole while making contact with an edge portion of the engagement hole, and the edge portion of the engagement hole enters into the step portion, and thereby the hook is engaged with the engagement hole.

6. The commodity sales data processing apparatus according to claim 3 , wherein:

the hooks are provided by two at positions sandwiching the second connector therebetween, and the engagement holes are provided by two at positions corresponding to the two hooks, respectively.

7. The commodity sales data processing apparatus according to claim 6 , wherein:

the two engagement holes are provided at positions sandwiching the first connector therebetween; and

the hooks enter into the engagement holes, respectively, when the first connector and the second connector are connected.

8. The commodity sales data processing apparatus according to claim 3 , wherein:

the docking station has a guide protrusion which is fitted into the engagement hole, to perform positioning of the data processing terminal to the docking station, when the docking station connects to the data processing terminal.

9. The commodity sales data processing apparatus according to claim 8 , wherein:

the guide protrusion is fitted into the engagement hole, to guide entering of the hook into the engagement hole.

10. The commodity sales data processing apparatus according to claim 4 , wherein:

the lock mechanism locks movement of the hook in a state to be engaged with the engagement hole.