JP2010195256A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device with facilitated operability for coupling a harness connector provided to a harness and covered with a grommet to a connector on a circuit substrate side. <P>SOLUTION: This device includes a liquid crystal display device 1 (display); a circuit substrate 3 arranged on back of the liquid crystal display device 1 and having drive means for driving the liquid crystal display device 1 and a connector 2; a case 7 housing the liquid crystal display device 1 and the circuit substrate 3 and provided with opening holes 6 having walls 5 faced to the connector 2; and a harness connector 8 and a grommet 9 coupled to the connector 2. The grommet 9 includes a tubular part 25, in which a wire 23 connected to the harness connector 8 is inserted; a skirt part 26 having a diameter larger than that the tubular part 25, covering the periphery of the harness connector 8 and fitted with the wall 5; an umbrella part 27 connecting the tubular part 25 and the skirt part 26; and a bent base part 28 provided at a corner between the tubular part 25 and the umbrella part 2 and capable of maintaining the umbrella part 27 while it is reverse-deformed on a side opposite to the harness connector 8. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a display device provided in a vehicle, for example, and particularly relates to a display device provided with a harness.

  In a display device for a vehicle in which a display and a circuit board are housed in a case, when a harness for electrical connection is pulled out of the case from the circuit board, or the harness on the vehicle side is electrically connected to the circuit board. When connecting, the connector provided on the circuit board and the harness connector provided on the harness side are combined in consideration of waterproof and dustproof properties. As a display device employing such a coupling structure, for example, there is Patent Document 1 below.

  In the vehicular instrument device (display device) in Patent Document 1, an opening 63 facing the instrument-side connector 52 mounted on the circuit board 50 is formed in the lower cover 62 constituting the case 60, and the periphery of the opening 63 A cylindrical hood portion 64 is provided in a protruding manner. On the other hand, a vehicle-side connector 70 is provided on the harness 80 side, and a cylindrical waterproof boot 90 is provided so as to cover the periphery of the vehicle-side connector 70. Then, the vehicle-side connector 70 is coupled to the instrument-side connector 52, and the waterproof boot 90 is fitted to the hood portion 64 so as to cover the hood portion 64, thereby electrically connecting the circuit board 50 and the harness 80, and opening Water and dust are prevented from entering the case 60 from the portion 63.

JP 2007-85786 A

  However, in Patent Document 1, since the vehicle-side connector 70 (harness connector) of the harness 80 is covered with the waterproof boot 90 (grommet), the vehicle-side connector 70 is used as the instrument-side connector 52 (connector). When connecting, it is difficult to visually recognize the connecting positions of the connectors 70 and 52, and it is difficult to perform the connecting work. For this reason, the waterproof boot 90 has to be coupled while turning a part of the opening end portion on the instrument side connector 52 side, and the workability is inferior.

  This invention is made in view of such a point, and it aims at providing the display apparatus with easy workability | operativity at the time of couple | bonding the harness connector with which it was equipped with the harness and was covered with the grommet to the connector by the side of a circuit board. To do.

  In order to achieve the above object, the present invention provides a display, a circuit board that is disposed behind the display and includes driving means and a connector for driving the display, and the display and the circuit board are accommodated in the circuit board. A cylinder provided with a case having an opening having a wall portion facing the connector, and a harness having a harness connector and a grommet coupled to the connector, and the grommet is a cylinder through which a wire connected to the harness connector is inserted A skirt portion that is larger in diameter than the tube portion and covers the periphery of the harness connector and is fitted into the wall portion, an umbrella portion that connects the tube portion and the skirt portion, and the tube portion and the umbrella And a bent base portion which is provided at a corner with respect to the portion and makes it possible to maintain a state in which the umbrella portion is inverted and deformed to the opposite side of the harness connector.

  In addition, the bent base portion includes an inclined plane portion in which the central axis side of the cylindrical portion is inclined toward the harness connector side with respect to the umbrella portion side.

  Further, the bent base portion is formed of a semicircular concave portion protruding toward the harness connector side.

  The bent base is thicker than the umbrella.

  The harness connector is exposed from the edge of the skirt in a state where the umbrella portion is inverted and deformed to the opposite side of the harness connector.

  It is possible to obtain a display device that facilitates workability when the harness connector provided in the harness and covered with the grommet is coupled to the connector on the circuit board side.

It is sectional drawing of the display apparatus which shows 1st Embodiment of this invention. It is principal part sectional drawing of the harness with which the display apparatus is equipped. It is sectional drawing which shows the state which reversed and deformed the umbrella part of the grommet with which the harness is equipped. It is sectional drawing of the grommet which shows 2nd Embodiment of this invention. It is sectional drawing of the grommet which shows 3rd Embodiment of this invention.

  A first embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the display is described as the liquid crystal display 1.

  The display device includes a liquid crystal display 1, a hard circuit board 3 provided behind the liquid crystal display 1, driving means for driving the liquid crystal display 1, a connector 2, and the like, and the liquid crystal display 1 as a circuit board. 3, a holding member 4 to be attached to 3, a case 7 provided with an opening 6 having a wall portion 5 in which the liquid crystal display 1, the holding member 4, and the circuit board 3 are accommodated and facing the connector 2; A harness 10 having a harness connector 8 and a grommet 9 is provided.

  The liquid crystal display 1 in the present embodiment includes a liquid crystal display element called a well-known TFT type although detailed description is omitted, and displays, for example, a vehicle fuel gauge and a vehicle operating state. Is. In addition to the liquid crystal display element, the liquid crystal display 1 includes a holding frame and a backlight light source that hold the liquid crystal display element (not shown).

  The case 7 is composed of a divided front case 7A and rear case 7B. The front case 7A has a window portion 11 made of a colorless and transparent synthetic resin and a cover made of an impermeable (for example, black) synthetic resin. The part 12 is integrally formed. The cover part 12 includes a front part 13 and a side part 14. Moreover, a substantially cylindrical front mounting boss 15 is integrally provided on the front portion 13 of the front case 7A.

  The rear case 7B is made of an impermeable synthetic resin like the front case 7A, has a bottom portion 16 and side portions 14A, and is used for the rear case 7B at a position corresponding to the front mounting boss 15 provided on the front case 7A. A rear mounting portion 17 is provided. Further, as described above, the bottom portion 16 is provided with the opening hole 6 having the wall portion 5 facing the connector 2.

  The holding member 4 is made of, for example, black synthetic resin, and is a barrier that prevents the inside of the case 7 from being visually recognized through the opening 18 that defines the visible region of the liquid crystal display 1 and the window 11 of the front case 7A. 19 and a fixing portion 20 corresponding to the front mounting boss 15 provided on the front case 7A are provided.

  Although not shown, the liquid crystal display 1 is fixed to the holding member 4 in advance, and then the fixing portion 20 of the holding member 4 is connected between the front mounting boss 15 of the front case 7A and the rear mounting portion 17 of the rear case 7B. Arranged together with the edge of the substrate 3. Then, by screwing the front mounting boss 15 of the front case 7A with screws 21, the liquid crystal display 1 is mounted on the circuit board 3, and the front case 7A and the rear case 7B are fixed.

  The harness 10 includes a harness connector 8 coupled to the connector 2 mounted on the back side of the circuit board 3, a vehicle-side connector 22 connected to the vehicle side, and a conductive connecting the harness connector 8 and the vehicle-side connector 22. A wire 23 as a member and a grommet 9 covering the periphery of the harness connector 8 are provided.

  The grommet 9 is an elastic body made of, for example, black synthetic rubber. The grommet 9 has a cylindrical portion 25 through which the wire 23 inserted through the protective tube 24 is inserted, and a diameter larger than the cylindrical portion 25 and around the harness connector 8. Covered and provided at the corners of the bottom part 26 fitted into the wall part 5 provided in the rear case 7B, the inclined umbrella part 27 connecting the cylindrical part 25 and the bottom part 26, and the cylindrical part 25 and the umbrella part 27 And a bent base portion 28 that makes it possible to maintain a state in which the umbrella portion 27 is reversely deformed to the opposite side of the harness connector 8. The umbrella part 27 and the skirt part 26 are located closer to the harness connector 8 side (circuit board 3 side) than the bent base part 28. The cylindrical portion 25 is fixed to the protective tube 24 by taping.

  The bent base portion 28 in this embodiment is provided with a large diameter portion 29 having a slightly larger diameter than the cylindrical portion 25 around the cylindrical portion 25, and the cylindrical portion 25 and the umbrella portion 27 are interposed between the large diameter portion 29 and the umbrella portion 27. A bent base portion 28 having a different inclination from that of the umbrella portion 27 is provided at a constant circumference. The bent base portion 28 is an inclined plane portion in which the central axis L side of the tubular portion 25 is inclined toward the harness connector 8 side rather than the umbrella portion 27 side. (An angle formed with the large diameter portion 29 is less than 90 degrees).

  A mounting operation of the harness 10 will be described. FIG. 1 is a diagram showing a state in which the harness connector 8 on the harness 10 side is coupled to the connector 2 on the circuit board 3 side and the skirt portion 26 of the grommet 9 is fitted into the wall portion 5 of the rear case 7B. Prior to this joining operation:

  In the state of FIG. 2, the skirt portion 26 of the grommet 9 is pushed toward the tube portion 25 side (arrow Z side). Then, the umbrella portion 27 of the grommet 9 that was on the harness connector 8 side is inverted and deformed to the opposite side of the harness connector 8 with the bent base portion 28 as a fulcrum, and this state is maintained as shown in FIG. The In the reversely deformed state, the harness connector 8 is exposed from the edge S of the skirt portion 26 of the grommet 9.

  In this state, after the harness connector 8 on the harness 10 side is coupled to the connector 2 on the circuit board 3 side, the state before the bottom portion 26 of the grommet 9 is inverted and deformed, that is, the harness connector 8 side (connector 2 side) The bottom part 26 is fitted into the wall part 5 of the rear case 7B.

  In this way, the liquid crystal display 1, the circuit board 3 provided with the connector 2, the case 7 provided with the opening hole 6 having the wall portion 5 in which the liquid crystal display 1 and the circuit board 3 are accommodated and facing the connector 2. A display device comprising a harness 10 having a harness connector 8 and a grommet 9 coupled to the connector 2, a tube portion 25 through which a wire 24 connecting the grommet 9 to the harness connector 8 is inserted, and this A skirt portion 26 that is larger in diameter than the tube portion 25 and covers the periphery of the harness connector 8 and is fitted into the wall portion 5, an umbrella portion 27 that connects the tube portion 25 and the skirt portion 26, and the tube portion 25 and the umbrella portion 27. And a bent base portion 28 that can maintain a state in which the umbrella portion 27 is inverted and deformed to the opposite side of the harness connector 8 and is covered with the grommet 9. When the harness connector 8 is coupled to the connector 2 on the circuit board 3 side, the hem portion 26 of the grommet 9 is moved to the cylindrical portion 25 side in advance and the umbrella portion 27 is inverted and deformed. 2 and the connector position of the harness connector 8 can be visually recognized, and a display device with easy coupling workability can be obtained.

  In addition, since the bent base portion 28 is formed of an inclined flat portion in which the central axis L side of the tubular portion 25 is inclined to the harness connector 8 side than the umbrella portion 27 side, when the hem portion 26 of the grommet 9 is pushed to the tubular portion 25 side, The umbrella portion 27 is easily bent from the base side (large diameter portion 29 side) of the inclined flat surface portion, and the reverse deformation is smoothly performed. Therefore, the subsequent connecting operation between the connector 2 and the harness connector 8 can be performed smoothly. Further, since the bent base portion 28 is provided at a constant circumference, the shape of the umbrella portion 27 after the reversal deformation is substantially constant, and the reversal deformed state is easily maintained.

  Further, since the harness connector 8 is exposed from the edge S of the hem portion 26 in a state in which the umbrella portion 27 is inverted and deformed to the opposite side of the harness connector 8, the coupling position between the connector 2 and the harness connector 8 is ensured. This makes it easy to visually recognize and facilitates coupling work when the harness connector 8 is coupled to the connector 2.

  In the present embodiment, the large-diameter portion 29 having a slightly larger diameter than the cylindrical portion 25 is provided around the cylindrical portion 25, but the large-diameter portion 29 may not be provided. However, the presence of the large-diameter portion 29 increases the rigidity of the portion, and the bent base portion 28 and the umbrella portion 27 having rigidity lower than that of the large-diameter portion 29 are easily deformed.

  A second embodiment of the present invention will be described with reference to FIG. This embodiment is different from the first embodiment in the shape of the bent base portion 28 of the grommet 9. In addition, the same code | symbol is attached | subjected about the same or an equivalent location as the said 1st Embodiment, and detailed description is abbreviate | omitted.

  The bent base portion 28 of the grommet 9 in the present embodiment is a concave portion having a semicircular cross section protruding toward the harness connector 8 side. The concave portion is provided around the entire circumference of the cylindrical portion 25, and there is no large-diameter portion 29 as in the first embodiment.

  With this configuration, as in the first embodiment, the connector 2 and the harness connector 8 are connected in a state where the hem portion 26 of the grommet 9 is moved to the cylindrical portion 25 side in advance and the umbrella portion 27 is inverted and deformed. Therefore, the connecting position between the connector 2 and the harness connector 8 can be visually recognized, and a display device with easy connecting workability can be obtained. Further, since the cross section of the bent base portion 28 protruding toward the harness connector 8 is a semicircular concave portion, the umbrella portion 27 is easily bent from the concave portion when the hem portion 26 of the grommet 9 is pushed toward the cylindrical portion 25 side. Thus, the reverse deformation is performed smoothly.

  A third embodiment of the present invention will be described with reference to FIG. This embodiment differs from the second embodiment only in the shape of the bent base portion 28 of the grommet 9. In addition, the same code | symbol is attached | subjected about the same or equivalent part as each said embodiment, and detailed description is abbreviate | omitted.

  In the bent base portion 28 of the grommet 9 in this embodiment, the angle formed with the central axis L of the cylindrical portion 25 is 90 degrees (that is, a flat portion), and the thickness t1 of the bent base portion 28 is an umbrella. It is thicker than the plate thickness t2 of the portion 27.

  With this configuration, as in each of the above-described embodiments, the connector 2 and the harness connector 8 are connected in a state where the hem portion 26 of the grommet 9 is moved to the cylindrical portion 25 side in advance and the umbrella portion 27 is inverted and deformed. Since the coupling work can be performed, the coupling position between the connector 2 and the harness connector 8 can be visually recognized, and a display device with easy coupling workability can be obtained. Further, since the plate thickness t1 of the bent base portion 28 is thicker than the plate thickness t2 of the umbrella portion 27, when the skirt portion 26 of the grommet 9 is pushed toward the tube portion 25, the bent base portion is thick and rigid. From the intersection of 28 and the umbrella part 27, the umbrella part 27 is easy to bend and the reverse deformation is performed smoothly.

  The present invention is not limited to the above embodiments. For example, although a liquid crystal display has been described as an example of the display, an analog display having a pointer may be used. The grommet may be a synthetic resin having flexibility. Further, the shape of the bent base portion of the grommet is not limited to the embodiment, and the shape is arbitrary as long as it is provided at the corners of the tube portion and the umbrella portion so as to be constant all around.

1 Liquid crystal display (display)
2 Connector 3 Circuit board 5 Wall 6 Opening hole 7 Case 7A Front case 7B Rear case 8 Harness connector 9 Grommet 10 Harness 25 Tube part 26 Bottom part 27 Umbrella part 28 Bending base L Central axis S Edge

Claims (5)

  A display, a circuit board provided behind the display, and a driving means and a connector for driving the display; and an opening having a wall portion that houses the display and the circuit board and faces the connector And a harness having a harness connector coupled to the connector and a grommet, and the grommet has a cylindrical portion through which a wire connected to the harness connector is inserted, and a diameter larger than that of the cylindrical portion. The hem part covering the periphery of the harness connector and fitted into the wall part; an umbrella part connecting the cylinder part and the hem part; and the umbrella part provided at a corner of the cylinder part and the umbrella part And a bent base portion that allows a state of being inverted and deformed to the opposite side of the harness connector to be maintained.   The display device according to claim 1, wherein the bent base portion includes an inclined flat portion in which a central axis side of the cylindrical portion is inclined toward the harness connector side with respect to the umbrella portion side.   The display device according to claim 1, wherein the bent base portion includes a semicircular concave portion protruding toward the harness connector.   The display device according to claim 1, wherein the bent base portion is thicker than the umbrella portion.   The said harness connector is exposed from the edge of the said skirt part in the state which reversed and deform | transformed the said umbrella part to the other side of the said harness connector, The Claim 1 characterized by the above-mentioned. Display device.

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