JP2014036008A - Flexible substrate and connector connecting structure, and steam cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a flexible substrate and connector connecting structure with high reliability capable of connecting a terminal electrode of a flexible substrate and a connector with narrower electrode pitch width than that of the terminal electrode without narrowing the pitch width of the terminal electrode of the flexible substrate.SOLUTION: The connecting structure comprises: a flexible cable 31a that is one part of a flexible substrate having four terminal electrodes 50; a carbon coat 51 provided to cover the four terminal electrodes 50 of the flexible cable 31a; and a connector 40 connected to the four terminal electrodes 50 of the flexible cable 31a and having eight electrodes 60. The two electrodes 60 of the connector 40 are electrically connected to each of the four terminal electrodes 50 of the flexible cable 31a.

Description

  The present invention relates to a connection structure between a flexible substrate and a connector, and a steam cooker.

  Conventionally, as a connection structure of a flexible substrate and a connector, there is one in which the electrodes of the connection terminals of the display panel substrate and the terminal electrodes of the flexible substrate are electrically connected by bonding the flexible substrate and the display panel substrate (for example, JP, 2012-083769, A (patent documents 1) reference).

JP 2012-083769 A

  By the way, when the connection structure of the conventional flexible board and connector is used in a heating cooker that performs cooking using steam, the terminal electrode of the flexible board is waterproofed by applying a carbon coat to prevent corrosion of the electrode metal. Measures are being taken.

  Since the carbon coating on the terminal electrode of such a flexible substrate has a limit in fine processing, the pitch width of the electrode of the flexible substrate is limited to 1 mm or more. However, in recent years, connectors are often used for mobile phones and the like, and components with a pitch width of 0.5 mm or less are mainly used. Therefore, in correspondence with the pitch width of electrodes of such general-purpose connectors. There is a problem that the pitch width of the terminal electrodes of the flexible substrate cannot be reduced, and the connector and the flexible substrate cannot be connected.

  Accordingly, an object of the present invention is to provide a highly reliable flexible connector that can connect a terminal electrode of a flexible substrate and a connector having a narrower electrode pitch width than the terminal electrode without reducing the pitch width of the terminal electrode of the flexible substrate. It is an object to provide a connection structure between a board and a connector and a steam cooker using the connection structure.

In order to solve the above problems, the connection structure of the flexible substrate and the connector of the present invention is as follows.
A flexible substrate having a plurality of terminal electrodes;
A hydrophobic and conductive coating provided to cover the plurality of terminal electrodes of the flexible substrate;
A connector to which the plurality of terminal electrodes of the flexible substrate are electrically connected;
A plurality of electrodes of the connector are electrically connected to each of the plurality of terminal electrodes of the flexible substrate.

  According to the above configuration, by electrically connecting the plurality of electrodes of the connector to each of the plurality of terminal electrodes of the flexible substrate, without reducing the pitch width of the terminal electrodes of the flexible substrate, The terminal electrode can be connected to a connector having a narrower electrode pitch than the terminal electrode. In addition, since a plurality of electrodes of the connector are electrically connected to one terminal electrode of the flexible substrate, even if a foreign matter causing contact failure adheres to the electrode surface, for example, one terminal electrode of the flexible substrate Since electrical connection is maintained by at least one of the plurality of electrodes of the connected connector being normally contacted without causing a contact failure due to foreign matter or the like, a highly reliable connection is obtained. Here, a plurality of electrodes of the connector connected to one terminal electrode of the flexible substrate handle the same signal. Moreover, by providing a hydrophobic and conductive coating so as to cover a plurality of terminal electrodes of the flexible substrate, waterproofing of the terminal electrodes of the flexible substrate can be taken, and it is suitable for a heating cooker that performs cooking using steam. A connection structure between a flexible substrate and a connector can be provided.

In addition, the connection structure of the flexible substrate and the connector of one embodiment is as follows.
The coating is a carbon coat.

  According to the above embodiment, by using the carbon coat for the coating covering the plurality of terminal electrodes of the flexible substrate, water is effectively utilized by utilizing the hydrophobicity of the carbon coat while maintaining good electrical connection with the electrode of the connector. You can play it.

Moreover, the steam cooker of this invention is
The connection structure between the flexible board and the connector is used for internal wiring.

  According to the above configuration, in the steam cooker in which the connection portion of the internal wiring may be exposed to water vapor, a highly reliable connection can be achieved by using the connection structure of the flexible substrate and the connector for the internal wiring. The reliability of the steam cooker can be improved.

  As is clear from the above, according to the present invention, the terminal electrode of the flexible board can be connected to the connector having a narrower electrode pitch width than the terminal electrode without reducing the pitch width of the terminal electrode of the flexible board. A highly reliable flexible board and connector connection structure, and a steam cooker using the flexible board and connector connection structure for internal wiring can be realized.

FIG. 1 is a front perspective view of a heating cooker using a connection structure between a flexible substrate and a connector according to an embodiment of the present invention. FIG. 2 is a front view of the operation panel of the cooking device. FIG. 3 is a side view of the operation panel of the cooking device. FIG. 4 is a back view of the operation panel of the cooking device. FIG. 5 is a cross-sectional view of the main parts of the flexible cable and the connector.

  Hereinafter, the connection structure between the flexible substrate and the connector of the present invention will be described in detail with reference to the illustrated embodiments.

  FIG. 1: has shown the front perspective view of the heating cooker as an example of the steam cooker using the connection structure of the flexible substrate and connector of one Embodiment of this invention.

  As shown in FIG. 1, the heating cooker has a door 2 attached to the front surface of a rectangular parallelepiped casing 1 that rotates about a side on the lower end side. A handle 3 is attached to the upper portion of the door 2 and a heat-resistant glass 4 is attached to the approximate center of the door 2. An operation panel 5 is provided on the right side of the door 2. The operation panel 5 includes a color liquid crystal display unit 6 and a button group 7 as an example of a display unit. An exhaust duct 8 is provided on the upper side of the casing 1 and on the right rear side. Further, a dew receptacle 9 is detachably attached below the door 2 of the casing 1.

  The cooking device includes a heating chamber (not shown), a heater (not shown) for heating food in the heating chamber, and a steam generator (not shown) for generating water vapor to be supplied to the heating chamber. And supplying steam from the steam generator to the heating chamber to perform oven cooking using superheated steam or steam cooking using steam. In such a heating cooker, water vapor from the heating chamber or the like may leak into the casing 1 and be exposed to water vapor on electrical components.

  FIG. 2 shows a front view of the operation panel 5 of the cooking device. The same components as those in FIG. 1 are denoted by the same reference numerals.

  The button group 7 includes a “return” key 11, a “takeover” key 12, a “manual heating” key 13, and a “hot start” key 14. The “return” key 11 is pressed to return the screen display to the previous screen display. Further, the “Takeshiki” key 12 is pressed when heating is stopped on the way or when the operation is canceled. The “manual heating” key 13 is pressed when manually setting the high frequency output and the heating output. The “warm start” key 14 is pressed to start heating.

  FIG. 3 shows a side view of the operation panel 5 of the heating cooker, and FIG. 4 shows a back view of the operation panel 5 of the heating cooker.

  As shown in FIGS. 3 and 4, the operation panel 5 holds a panel member 15, a liquid crystal display panel 20 disposed so as to face a display frame provided on the panel member 15, and the liquid crystal display panel 20. A holding member 21 and a control board 22 attached to the holding member 21 are included.

  A touch switch unit 30 is attached to the back side of the panel member 15 facing the “return” key 11 (shown in FIG. 2) and the “manual heating” key 13 (shown in FIG. 2) of the operation panel 5. The touch switch unit 30 uses a capacitive type or resistive type touch switch or the like, but any type of touch switch may be used.

  The touch switch unit 30 includes a flexible substrate 31, and a flexible cable 31 a extending from the flexible substrate 31 is inserted into the connector 40 mounted on the control substrate 22 from below to above.

  FIG. 5 shows a cross-sectional view of the main parts of the flexible cable 31a and the connector 40. FIG.

  As shown in FIG. 5, four terminal electrodes 50 are provided at equal intervals on the flexible cable 31a. A carbon coat 51 as an example of a hydrophobic and conductive film is provided so as to cover the four terminal electrodes 50 of the flexible cable 31a. Further, eight electrodes 60 are provided at equal intervals on the base 61 of the connector 40. Two electrodes 60 of the connector 40 are electrically connected to one terminal electrode 50 of the flexible cable 31a.

  The four terminal electrodes 50 of the flexible cable 31a have a pitch width P1 of 1.0 mm and an electrode width W1 of 0.5 mm. The eight electrodes 60 of the connector 40 have a pitch width P2 of 0.5 mm and an electrode width W2 of 0.2 mm.

  According to the connection structure of the flexible board and the connector having the above-described configuration, the flexible electrode 31 is flexible by electrically connecting the two electrodes of the connector 40 to the one terminal electrode 50 of the flexible cable 31a that is a part of the flexible board 31. The terminal electrode 50 of the flexible cable 31a can be connected to the connector 40 having a narrow pitch width from the terminal electrode 50 without reducing the pitch width of the terminal electrode 50 of the cable 31a.

  Moreover, even if a foreign substance that causes poor contact adheres to the electrode surface by electrically connecting the two electrodes 60 of the connector 40 to one terminal electrode 50 of the flexible cable 31a, for example, the flexible cable 31a Since at least one of the two electrodes 60 of the connector 40 connected to one terminal electrode 50 is normally contacted without causing a contact failure due to foreign matter or the like, electrical connection is maintained, so that reliability is ensured. High connection is obtained. Here, the two electrodes 60 of the connector 40 connected to one terminal electrode 50 of the flexible cable 31a of the flexible substrate 31 handle the same signal.

  In addition, by providing the carbon coat 51 so as to cover the plurality of terminal electrodes 50 of the flexible cable 31a, waterproofing of the terminal electrodes 50 of the flexible cable 31a can be performed, which is suitable for a heating cooker that performs cooking using steam. A connection structure between a flexible substrate and a connector can be provided.

  In addition, in the state in which the terminal electrode 50 of the flexible cable 31a of the flexible substrate 31 and the electrode 60 of the connector 40 are connected, the carbon coating 51 having hydrophobicity is applied to the plurality of terminal electrodes 50 of the flexible cable 31a. Thus, even if water enters the connecting portion, the carbon coat 51 repels water that attempts to enter the contact surface between the plurality of terminal electrodes 50 of the flexible cable 31a and the electrode 60 of the connector 40, thereby preventing water from entering. In addition, corrosion of the contact surface of the electrode 40 of the connector 40 can be prevented.

  Here, the water that tries to enter the connection portion is repelled by the carbon coat 51, and the repelled water is guided between the terminal electrodes 50 of the flexible substrate 31 and / or between the terminal electrodes 50 of the flexible cable 31a. . And even if water invades between the electrodes 60 of the connector 40 that contacts the same terminal electrode 50 of the flexible cable 31a and the first space formed by the terminal electrodes 50 and the electrodes 60 are short-circuited, the same Since the signal is handled, there is no problem. On the other hand, the second space formed between the adjacent terminal electrodes 50 of the flexible cable 31a and the electrode 60 of the connector 40 facing the adjacent terminal electrode 50 is larger than the first space. Even if water enters, the adjacent terminal electrodes 50 are not easily short-circuited.

  In the above embodiment, the carbon coat 51 is provided as a hydrophobic and conductive film so as to cover the four terminal electrodes 50 of the flexible cable 31a. However, the present invention is not limited to this, and ZnO, conductive polymer (PEDOT), etc. Alternatively, a hydrophobic and conductive film may be used.

  In the above embodiment, the pitch width P1 of the plurality of terminal electrodes 50 of the flexible cable 31a that is a part of the flexible substrate 31 is 1.0 mm, the electrode width W1 is 0.5 mm, and the plurality of electrodes 60 of the connector 40 is used. The pitch width P2 is 0.5 mm and the electrode width W2 is 0.2 mm. However, the pitch width and electrode width of the plurality of terminal electrodes of the flexible substrate and the plurality of electrodes of the connector are not limited thereto. For example, while the pitch width of the plurality of electrodes of the connector is set to 0.5 mm and the electrode width is set to 0.2 mm, the pitch width of the plurality of terminal electrodes of the flexible substrate is set to 1.0 mm and the electrode width is set to 0.7 mm. The gap between them may be 0.3 mm. In this case, since the entire contact surface of the two electrodes of the connector comes into contact with the contact surface of one terminal electrode of the flexible substrate, the contact area increases, so that the contact resistance can be reduced.

  Further, the plurality of terminal electrodes of the flexible substrate and the plurality of electrodes of the connector of the present invention are not limited to the equal interval, and may be at different intervals. For each of the plurality of terminal electrodes of the flexible substrate, a plurality of connectors Any electrode may be used as long as two or more of the electrodes are electrically connected.

  Moreover, in the said embodiment, although the flexible substrate and connector connection structure which electrically connected the two electrodes 60 of the connector 40 with respect to the one terminal electrode 50 of the flexible cable 31a were demonstrated, this invention is A flexible substrate and connector connection structure in which three or more electrodes of the connector are electrically connected to one terminal electrode of the flexible substrate may be used, and the number of connectors connected to each terminal electrode is two or more. The number of electrodes may be different.

  Moreover, in the said embodiment, although the heating cooker using the connection structure of a flexible substrate and a connector for internal wiring was demonstrated, you may apply this invention to the other apparatus which has a connection structure of a flexible substrate and a connector. In particular, when the connection structure of the flexible substrate and the connector according to the present invention is applied to a steam cooker using steam, a remarkable effect can be obtained.

  Although specific embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Casing 2 ... Door 3 ... Handle 4 ... Heat-resistant glass 5 ... Operation panel 6 ... Color liquid crystal display part 7 ... Button group 11 ... "Return" key 12 ... "Takeshiki" key 13 ... "Manual heating" key 14 ... "Warm Start key 20 ... Liquid crystal display panel 21 ... Holding member 22 ... Control board 15 ... Panel member 30 ... Touch switch part 31 ... Flexible board 31a ... Flexible cable 40 ... Connector 50 ... Terminal electrode 51 ... Carbon coat 60 ... Electrode 61 ... Base part

Claims (3)

A flexible substrate having a plurality of terminal electrodes;
A hydrophobic and conductive coating provided to cover the plurality of terminal electrodes of the flexible substrate;
A connector to which the plurality of terminal electrodes of the flexible substrate are electrically connected;
A connection structure between a flexible substrate and a connector, wherein the plurality of electrodes of the connector are electrically connected to each of the plurality of terminal electrodes of the flexible substrate. In the connection structure of the flexible substrate and the connector according to claim 1,
The above-mentioned film is a carbon coat, The connection structure of the flexible substrate and connector characterized by the above-mentioned.   A steam cooker, wherein the connection structure of the flexible board and the connector according to claim 1 is used for internal wiring.

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