JP2019145579A - Holding structure for display device and circuit board with connector - Google Patents

Abstract

To provide a display device and a holding structure for a circuit board with a connector which can reduce stress on a soldered part due to insertion and removal of the connector.SOLUTION: The holding structure includes: a circuit board; a connector 25 provided on the circuit board and having a connection port having an insertion and removal direction parallel to a surface direction of the circuit board; a case 33, for accommodating the circuit board, having an opening 45b for exposing the connection port and an insertion-side regulating wall 51 for regulating a movement of the connector 25 in an insertion direction. The case 33 further includes a removal-side restriction wall 52 that restricts a movement of the connector 25 in the removal direction.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a display device mounted on a vehicle or the like and a circuit board holding structure with a connector.

  A vehicle such as an automatic person or a motorcycle has a display device that displays the speed of the vehicle, the engine speed, the state of the vehicle, and the like. The display device includes a circuit board that performs electrical control of the display device. This circuit board has a connector for electrically connecting to a device outside the display device. For example, Patent Document 1 discloses a holding structure for a printed circuit board with a connector, in which stress is hardly applied to a soldered portion of the printed circuit board when a mating connector is attached to or detached from the connector.

JP-A-11-135965

  Since the display device is arranged in a limited space on the vehicle, the display device is designed in consideration of the installation space in the vehicle. For this reason, it may be necessary to make the insertion / extraction direction of the connector parallel to the circuit board. In this case, for example, the holding structure disclosed in Patent Document 1 cannot be applied, and a crack may occur in the soldered portion.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a display device and a circuit board holding structure with a connector that can reduce stress on a soldered portion due to insertion and removal of a connector. To do.

  In order to solve the above-described problem, a display device and a circuit board holding structure with a connector according to the present invention have a circuit board and an insertion / extraction direction that is provided on the circuit board and parallel to the surface direction of the circuit board. A case having a connector having a connection port; an opening that accommodates the circuit board and exposes the connection port; and an insertion-side regulating wall that regulates movement of the connector in the insertion direction.

  In the display device and the circuit board holding structure with the connector according to the present invention, it is possible to reduce the stress applied to the soldered portion when the connector is inserted or removed.

The front view which is embodiment of the display apparatus which concerns on this invention, and shows the whole structure. Sectional drawing which follows the II-II line | wire of FIG. Sectional drawing which follows the III-III line of FIG. The perspective view which looked at the lower case from the inside. The perspective view which looked at the lower case from the inside for explaining the case where a connector is arranged in the lower case.

  An embodiment of a display device and a circuit board holding structure with a connector according to the present invention will be described with reference to the accompanying drawings. The display device and the circuit board with connector according to the present invention are mounted on a vehicle such as an automobile or a motorcycle, a ship, an agricultural machine, or a construction machine.

  FIG. 1 is a front view showing an overall configuration of an embodiment of a display device according to the present invention.

  2 is a cross-sectional view taken along line II-II in FIG.

  3 is a cross-sectional view taken along line III-III in FIG.

  In the following description, the “front side” means the front side in FIG. 1 and the left side in FIG. 2 and FIG. 3 (upper case 32 side), which means the side visually recognized by the viewer. “Back side” means the back side in FIG. 1 and the right side (lower case 33 side) in FIGS. 2 and 3. “Upper side” means the upper side in FIGS. 1 to 3. “Lower side” means the lower side in FIGS. 1 to 3.

  The display device 1 is mounted in an instrument panel of a vehicle. The display device 1 includes a display unit 10, a circuit board 20, and a case 30.

  The display unit 10 has a display panel and a backlight unit. The display panel is a TFT (Thin Film Transistor) liquid crystal display panel. The display panel has a pair of surface glass substrates that enclose a liquid crystal layer. Transparent electrodes are formed on the pair of glass substrates with ITO (Indium Tin Oxide) or the like. Further, the display panel has a pair of surface polarizing plates (polarizing filters) arranged so as to sandwich the pair of surface glass substrates. The display panel is connected to the circuit board 20 via FPC (Flexible Printed Circuits). The display panel is controlled by the control unit of the circuit board 20 so that a driving voltage is applied to the liquid crystal layer through the transparent electrode. Thereby, the orientation of the liquid crystal molecules in the liquid crystal layer is controlled, and the individual pixels of the display panel are switched to the transmissive state or the non-transmissive state. With such a combination of pixels, the display panel displays predetermined information on the display screen 15. The backlight unit includes a light source such as an LED (Light Emitting Diode) and a light guide, and illuminates the display panel from the back side.

  The circuit board 20 is disposed on the back side of the display unit 10. The circuit board 20 is formed of a hard board made of, for example, a glass epoxy material. The circuit board 20 mainly includes a display panel and light source driver, and a display panel and light source control unit.

  The control unit includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and executes predetermined arithmetic processing according to a program written in the ROM, for example. The control unit acquires, for example, vehicle speed acquired by various sensors, various vehicle information, and the like via an ECU (Electronic Control Unit) of the vehicle. The control unit drives and controls the display panel and the light source based on the acquired information.

  The circuit board 20 is a circuit board with a connector and has a connector 25. The connector 25 is fixed to the back surface 21 (on the circuit board 20) of the circuit board 20 with screws 26. The connector 25 has a terminal, and one end of the terminal is fixed to the circuit board 20 by soldering. The connector 25 is connected to the mating connector of the wire harness from the outside of the display device 1 through the connection port 27. The connection port 27 has an insertion / extraction direction parallel to the surface direction of the circuit board 20.

  The case 30 includes a middle case 31, an upper case (front case) 32, and a lower case 33 (rear case).

  The middle case 31 is made of a light-shielding synthetic resin such as white, for example, and fixes and supports the display unit 10 and the circuit board 20.

  The upper case 32 and the lower case 33 are made of a light-shielding synthetic resin such as black. The upper case 32 and the lower case 33 are combined to form an outline of the display device 1. The upper case 32 and the lower case 33 form an internal space, and the intermediate case 31, the display unit 10, and the circuit board 20 are accommodated in the internal space. The upper case 32 has an opening 32a substantially corresponding to the area of the display screen 15 in which the cover 35 is integrally formed by insert molding. The cover 35 is made of translucent polycarbonate resin or inorganic glass, for example. The cover 35 covers the opening 32a so that dust or the like does not enter the display screen 15 or the like.

  Here, FIG. 4 is a perspective view of the lower case 33 viewed from the inside. FIG. 5 is a perspective view of the lower case 33 as viewed from the inside for explaining a case where the connector 25 is disposed on the lower case 33. In FIG. 5, the circuit board 20 is not shown.

  The lower case 33 has a main body 41 and a cylinder 45. The main body 41 has a base surface 42 that forms the back surface of the display device 1, and a side surface 43 that rises substantially vertically from the four sides of the base surface 42. The cylinder 45 has one open end 45a at the approximate center of the lower side surface 43a. The tube 45 extends downward from the one open end 45a, and has the other open end 45b at a position protruding downward from the entire case 30. The opening end 45 b functions as an opening that exposes the connection port 27 of the connector 25. The cylinder 45 is mainly covered with an outer wall 46 on the outer surface 45c on the back side. The cylinder 45 is mainly covered with a flange 32b provided in the upper case 32 in the outer surface 45c on the front surface side, and a region not covered by the outer wall 46 and a region overlapping with both ends of the outer wall 46 are covered. ing. The flange 32b has an arc shape having flanges 32c (FIG. 1) at both ends, and prevents water from entering the case 30 from the open end 45b.

  The lower case 33 has an insertion side restriction wall 51 and a removal side restriction wall 52 as a holding structure of the connector 25.

  The insertion-side regulating wall 51 extends from the inner surface 42a of the base surface 42 of the lower case 33 to the inner side (right side to left side) of the case 30 and the direction (normal direction) perpendicular to the surface direction (insertion / extraction direction) of the circuit board 20. It is a protruding protrusion. A plurality (three in FIG. 4 and FIG. 5) of insertion-side regulating walls 51 are provided according to the dimensions of the connector 25 and the like. The insertion-side regulating wall 51 regulates the movement of the connector 25 from the lower side toward the upper side, which is the insertion direction of the connector 25 (the mating connector with respect to the connector 25). Specifically, the insertion-side regulating wall 51 supports the wall surface 25 a that is the outside of the surface forming the inner wall of the connection port 27 of the connector 25 so that the connector 25 does not move upward with respect to the lower case 33.

  The insertion side regulating wall 51 has a guide surface 54 at the top. When the circuit board 20 provided with the connector 25 is disposed in the lower case 33, the guide surface 54 is inclined so as to be lowered along the direction (from the upper side to the lower side) in which the connector 25 is disposed at the opening end 45b (opening). ing. Since the connector 25 is accommodated in the cylinder 45, the workability when the circuit board 20 is assembled to the lower case 33 may be reduced. Further, since the insertion-side regulating wall 51 is provided on the base surface 42 of the lower case 33, there is a possibility that the assembling work may be hindered. On the other hand, since the guide surface 54 is provided, when the connector 25 is disposed on the tube 45, the connector 25 slides on the guide surface 54 and is guided into the tube 45, so that assembly can be simplified.

  The removal-side regulating wall 52 is a protrusion that protrudes from the inner surface 45 d on the front side of the tube 45 toward the inside of the tube 45 at the opening end 45 a of the tube 45. A plurality (two in FIG. 4 and FIG. 5) of the removal-side regulating walls 52 are provided according to the dimensions of the connector 25 and the like. The removal-side restriction wall 52 restricts the movement of the connector 25 from the upper side to the lower side, which is the removal direction of the connector 25 (the mating connector with respect to the connector 25). Specifically, the removal-side regulating wall 52 is outside the wall surface 25 b that forms the side wall of the connection port 27 of the connector 25, and the connector 25 is connected to the lower case 33 on the wall surface 25 b facing the back surface 21 of the circuit board 20. On the other hand, it is supported not to move downward. The wall surface 25 b has a rising portion 25 c with respect to the circuit board 20 on the near side of the connection port 27. The removal-side regulating wall 52 supports the connector 25 using the rising portion 25c.

  In such a display device 1 according to the present embodiment, the lower case 33 is provided with the insertion-side restriction wall 51 and the removal-side restriction wall 52. Thereby, like the connector 25 of this embodiment, the holding structure (for example, refer patent document 1) which the insertion / extraction direction is horizontal with the circuit board 20, and suppresses the movement of the connector 25 at the time of insertion / extraction with respect to the circuit board 20. Even if it cannot be removed, the connector 25 can be suitably held.

  Therefore, the display device 1 can reduce the stress on the soldered portion on the circuit board 20 due to the insertion / extraction of the connector 25. As a result, it is possible to reduce the possibility of causing contact failure in the soldered portion between the connector 25 and the circuit board 20. In particular, such a display device 1 is effective when applied to a motorcycle in which the connector 25 can be frequently inserted and removed because the wire harness is exposed.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 Display apparatus 10 Display unit 15 Display screen 20 Circuit board 21 Back surface 25 Connector 25a, 25b Wall surface 25c Standing part 26 Screw 27 Connection port 30 Case 31 Middle case 32 Upper case 32a Opening 32b 庇 32c 鍔 33 Lower case 35 Cover 41 Main body 42 Base surface 42a Inner surface 43, 43a Side surface 45 Tube 45a, 45b Open end (opening)
45c Outer surface 45d Inner surface 46 Outer wall 51 Insertion side regulating wall 52 Extraction side regulating wall 54 Guide surface

Claims (7)

A circuit board;
A connector provided on the circuit board and having a connection port having an insertion / extraction direction parallel to a surface direction of the circuit board;
A display device, comprising: an opening that accommodates the circuit board and exposes the connection port; and a case having an insertion-side regulating wall that regulates movement of the connector in the insertion direction.   The display device according to claim 1, wherein the case further includes a removal-side restriction wall that restricts movement of the connector in the removal direction.   The insertion-side regulating wall is a protrusion that protrudes from the case in a direction perpendicular to the surface direction of the circuit board, and the connector does not move with respect to the case outside the surface that forms the inner wall of the connection port. The display device according to claim 1, wherein the display device is supported.   3. The display according to claim 2, wherein the removal-side regulating wall is outside a surface forming a side wall of the connection port, and supports a surface facing the circuit board so that the connector does not move relative to the case. apparatus.   The display device according to claim 1, wherein the insertion-side regulating wall has a guide surface that is inclined so as to be lowered along a direction in which the connector is disposed in the opening. A circuit board;
A connector provided on the circuit board and having a connection port having an insertion / extraction direction parallel to a surface direction of the circuit board;
A holding structure for a circuit board with a connector, comprising: a case having an opening for accommodating the circuit board and exposing the connection port; and an insertion side regulating wall for regulating movement of the connector in the insertion direction.   The holding structure for a circuit board with connector according to claim 6, wherein the case further includes a removal-side regulating wall that regulates movement of the connector in the removal direction.

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