Image recording device

Abstract

To accurately detect defects of a single capacitive element provided in a recording head unit.SOLUTION: In a relay substrate 70 mounted on a carriage, connection wiring 106 capable of being connected to a terminal on the other side of a first capacitor 64 is provided. The first capacitor 64 provided in a recording head unit 6 is made to be in a first state of being separated from ground wiring 102 when it is not connected to the connection wiring 106, and is made to be in a second state of being connected to power source supply wiring 101 and the ground wiring 102 through the connection wiring 106 when it is connected to the connection wiring 106. When the first capacitor 64 is not connected to the connection wiring 106, a voltage can be applied between second wiring 101a and wiring 105b each connected to terminals on both sides of the first capacitor 64 by a probe.SELECTED DRAWING: Figure 6

Claims

1. Recording head unit, A head support portion that supports the aforementioned recording head unit, Power supply wiring connected to the power terminal, It is equipped with a ground wire connected to the ground terminal, The aforementioned recording head unit is A portion of the aforementioned power supply wiring, A portion of the aforementioned ground wiring, A drive circuit to which voltage is supplied by the aforementioned power supply wiring, A recording element to which a drive voltage is applied by the aforementioned drive circuit and to which the ground wiring is connected, It is equipped with a capacitive element, The head support portion is provided with connecting wiring that can be connected to at least one terminal of the capacitive element. When the capacitive element is not connected to the connecting wiring, it enters a first state in which it is disconnected from at least one of the power supply wiring and the ground wiring, and when it is connected to the connecting wiring, it enters a second state in which it is connected between the power supply wiring and the ground wiring via the connecting wiring. An image recording device characterized in that, when the capacitive element is not connected to the connecting wiring, a probe can be used to apply a voltage between a pair of wires connected to the terminals at both ends of the capacitive element.

2. The image recording apparatus according to claim 1, characterized in that when the capacitive element is not connected to the connecting wiring, a voltage can be applied between the power supply wiring and the ground wiring provided on the recording head unit by a probe.

3. The image recording device according to claim 2, characterized in that the recording element includes a nozzle for discharging liquid, a pressure chamber communicating with the nozzle, and a piezoelectric element containing a piezoelectric body for applying pressure to the liquid in the pressure chamber.

4. The image recording apparatus according to claim 2, characterized in that the recording head unit has a capacitance smaller than the capacitance of the capacitive element, and further comprises a small capacitance element connected between the power supply wiring and the ground wiring.

5. The system further comprises a circuit board on which the power terminal and the ground terminal are provided, The aforementioned recording head unit is A head having the recording element, The first wiring member on which the drive circuit is mounted, The device comprises a second wiring member on which the aforementioned capacitive element is mounted and on which a portion of the power supply wiring and the ground wiring are provided, The substrate and the second wiring member are configured to be electrically detachable, and by electrically connecting the substrate and the second wiring member, the head and the substrate are electrically connected via the first wiring member and the second wiring member. The aforementioned connection wiring is provided on the circuit board. The image recording apparatus according to any one of claims 1 to 4, characterized in that the capacitive element enters a first state when the substrate and the second wiring member are not electrically connected, and enters a second state when the substrate and the second wiring member are electrically connected.

6. When the capacitive element is in the first state, one of its terminals is disconnected from the ground wiring. The image recording apparatus according to claim 5, characterized in that the connecting wiring can connect the end of the wiring connected to one terminal of the capacitive element in the second wiring member, on the side opposite to the capacitive element, and the portion of the ground wiring provided on the substrate.

7. When the capacitive element is in the first state, one of its terminals is disconnected from the power supply wiring. The image recording apparatus according to claim 5, characterized in that the connecting wiring can connect the end of the wiring connected to one terminal of the capacitive element in the second wiring member, on the side opposite to the capacitive element, to the portion of the power supply wiring provided on the substrate.

8. The recording head unit further has a cover made of an insulating material that can cover at least a portion of the recording head unit. When the capacitive element is in the first state, one of its terminals is disconnected from the ground wiring. The recording head unit further has a ground connection wiring connected to the ground wiring, The image recording apparatus according to any one of claims 1 to 4, characterized in that the connecting wiring is a conductive pattern formed on the cover, and when the cover covers the recording head unit, it is possible to connect the end of the wiring connected to one terminal of the capacitive element on the side opposite to the capacitive element and the end of the ground connecting wiring on the side opposite to the ground wiring.

9. The recording head unit further has a cover made of an insulating material that can cover at least a portion of the recording head unit. When the capacitive element is in the first state, one of its terminals is disconnected from the power supply wiring. The recording head unit further has power connection wiring connected to the power supply wiring, The image recording apparatus according to any one of claims 1 to 4, characterized in that the connecting wiring is a conductive pattern formed on the cover, and when the cover covers the recording head unit, it is possible to connect the end of the wiring connected to one terminal of the capacitive element on the side opposite to the capacitive element and the end of the power connection wiring on the side opposite to the power supply wiring.

10. Recording head unit, A head support portion that supports the aforementioned recording head unit, Power supply wiring connected to the power terminal, The ground wiring connected to the ground terminal, It includes a connecting wire, one end of which is connected to either the power supply wiring or the ground wiring, The aforementioned recording head unit is A portion of the aforementioned power supply wiring, A portion of the aforementioned ground wiring, A drive circuit to which voltage is supplied by the aforementioned power supply wiring, A recording element to which a drive voltage is applied by the aforementioned drive circuit and to which the ground wiring is connected, Capacitive elements and, It comprises a first wiring and a second wiring connected to both terminals of the aforementioned capacitive element, The end of the first wiring opposite to the capacitive element side is connected to the power supply wiring and the ground wiring on the side opposite to the side to which the connecting wiring is connected. The connecting wiring has at least a portion of it, including the other end opposite to the one end, that is provided on the head support, and the other end is connectable to the end of the second wiring opposite to the capacitive element side. The image recording device is characterized in that, when the second wiring is not connected to the connecting wiring, a voltage can be applied by a probe between the first wiring and the second wiring, which are connected to the terminals at both ends of the capacitive element, respectively.

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