JP7076070B2 - Display device - Google Patents

Description

The present invention relates to a display device.

A display device for a vehicle using a liquid crystal display as a display unit is known. The liquid crystal display may be connected via a connector on which a flexible printed circuit board is mounted on the circuit board for connection to the circuit board, and there is a margin for the length from the liquid crystal display to the connector for connection work. It is necessary to use a flexible printed circuit board.
For this reason, after connecting the flexible printed circuit board to the connector, when assembling other parts to the circuit board, it is easy for workers and tools to touch the excess part of the flexible printed circuit board, and the force applied to the flexible printed circuit board causes damage and poor connection. It may occur, and it becomes complicated to confirm the connection failure that has occurred.
Therefore, for example, in the display panel for a vehicle disclosed in Patent Document 1 below, the liquid crystal display and the connector are arranged on the surface side of the circuit board, and the excess portion of the length of the flexible printed circuit board is used as the case or bezel of the liquid crystal display. It is designed to be pressed by the protrusion provided in.
Further, in the vehicle instrument disclosed in Patent Document 2, the liquid crystal display is arranged on the front surface side of the circuit board, the connector is arranged on the back surface side, and the flexible printed circuit board inserted into the insertion hole formed in the circuit board is on the back surface side. The surplus part is placed on the back side.

Japanese Unexamined Patent Publication No. 2007-17404 Japanese Unexamined Patent Publication No. 2015-75327

In the display panel of Patent Document 1, since the flexible printed board is constantly pressed by the projecting pieces provided on the case or bezel, the flexible printed board is damaged by rubbing against the projecting pieces in contact with the vibration of the vehicle, resulting in poor connection. May be invited.
Further, in the vehicle instrument of Patent Document 2, since the flexible printed circuit board is led out to the back surface side through the insertion hole of the circuit board, the flexible printed circuit board comes into contact with the sharp end face of the insertion hole due to the vibration of the vehicle or the like. This may cause rubbing and damage, leading to poor connection, and may come into contact with excess parts when working on the back surface side.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a display device capable of preventing damage to a surplus portion of a flexible printed circuit board.

In order to achieve the above object, the display device according to the present invention is
Display unit and
A flexible printed circuit board extended from the display unit and
The display unit is mounted, and a circuit board provided on the mounting side of the display unit and having a connector to be connected to the flexible printed circuit board is provided.
The circuit board has a hole for locating an excess portion of the length of the flexible printed circuit board on the non-mounting side of the display unit.
The display unit has a protective cover portion that protrudes from the hole portion to the non-mounting side of the display unit, positions the surplus portion of the length inward, and covers the non-mounting side of the surplus portion of the length. ,
It is characterized by that.

According to the present invention, it is possible to prevent damage to the excess portion of the flexible printed substrate.

It is a schematic front view applied to the instrument device of the vehicle which concerns on one Embodiment of the display device of this invention. FIG. 3 is a cross-sectional view taken along the line AA in FIG. 1 according to an embodiment of the present invention. It is a perspective view which shows by disassembling which concerns on one Embodiment of this invention. According to an embodiment of the present invention, (a) is a perspective view from the front side, and (b) is a perspective view from the back side. It is a partially enlarged sectional view which concerns on one Embodiment of this invention.

The display device according to the embodiment of the present invention will be described in detail with reference to the drawings.
The display device 1 of the present embodiment is incorporated in an instrument device (combination meter) 100 for vehicles such as automobiles and motorcycles, and is configured as, for example, a liquid crystal display unit 30.
In the following description, the visual side when the display device 1 is viewed from the front (that is, when the user confirms the design unit (index unit) such as the measured value when the display device 1 is viewed from the front is referred to as a "table". The back side is the "back".

The instrument device 100 is configured as a composite instrument for notifying various information about the vehicle to be mounted, and as shown in FIGS. 1 and 2, the first instrument unit 10, the second instrument unit 20, and the liquid crystal display unit 30 are used. A circuit board 40, a middle case 50, a display board 60, an instrument light source 70, and a lower case 80 are provided.

(Instrument device 100)
The first instrument unit 10 is, for example, a pointer-type speedometer, and is obtained by comparing and reading a design unit (index unit) such as a scale and a numerical value and a pointer 11 indicating the design unit (index unit). Notify the vehicle speed. In the pointer 11, the rotation center portion 11a, which is the rotation center thereof, and the instruction portion 11b protruding from the rotation center portion 11a in the radial direction are integrally formed of, for example, a transparent resin such as PMMA (Polymethymethacrylate). The rotation center portion 11a is covered with a pointer cap 11c made of a predetermined synthetic resin having a light-shielding property. The indicator 11b receives the light of the pointer light source 72, which will be described later, and emits light. The pointer 11 is connected to the rotary shaft 12a of the stepping motor 12 which is a drive unit and is rotationally driven.

The second instrument unit 20 is, for example, a pointer-type tachometer, and is obtained by comparing and reading a design unit (index unit) such as a scale and a numerical value, and a pointer 21 indicating the design unit (index unit). Notifies the engine speed. Since the configuration of the second instrument unit 20 is the same as that of the first instrument unit 10, the following description will be omitted.

The liquid crystal display unit (display device) 30 includes a liquid crystal display (LCD: Liquid Crystal Display) 32, an organic EL display (OELD: Organic Electro-Luminescence Display), and the like, and displays, for example, images showing various information about the vehicle. As an example of various information, the liquid crystal display unit 30 functions as an odometer for notifying a mileage by a display image.
The details of the liquid crystal display unit 30 will be described later.

As shown in FIG. 2, the circuit board 40 has various wirings printed on, for example, a plate-shaped base material having an insulating property made of glass epoxy resin (Glass Fiber Reinforced Plastics). Various electronic components are mounted on the circuit board 40.
The various electronic components mounted on the circuit board 40 are a control unit (microcomputer or the like (not shown)) that controls the operation of each part of the instrument device 100, a stepping motor 12 that rotationally drives the pointer 11, and a circuit connected to various electronic components. These include a resistor and a capacitor constituting the above, a light source 71 for a display board for illuminating a display board 60 which is a light source 70 for an instrument, a light source 72 for a pointer, and the like.
The control unit acquires vehicle information such as the speed and mileage of the vehicle from an external device of the instrument device 100 (for example, the ECU (Electronic Control Unit) of the vehicle), and based on the acquired information, the light source 71 for the display board and the like. It controls the operation of the stepping motor 12 that turns on / off the pointer light source 72 and rotationally drives the pointer 11 and the display of an image by the liquid crystal display unit 30.
As shown in FIG. 2, the display board light source 71 and the pointer light source 72 are mounted on the front side of the circuit board 40. Although not shown, the control unit is mounted on the front side of the circuit board 40, and the stepping motor 12 is mounted on the back side of the circuit board 40.

The middle case 50 is located on the front side of the circuit board 40, and houses the first instrument unit 10, the second instrument unit 20, the liquid crystal display unit 30, and the like, and the instrument device 100 such as the display board 60. Holds the parts that make up the. The middle case 50 is formed in white by, for example, a resin such as polypropylene.
As shown in FIG. 2 in FIG. 2, the middle case 50 includes an inner cylinder portion 51 formed in the central portion, an outer cylinder portion 52 on the outer peripheral side, and a connecting portion 53 connecting these. It is equipped with.
The rotation center portion 11a of the pointer 11 is located inside the inner cylinder portion 51 in the central portion of the middle case 50, and the light of the pointer light source 72 on the circumference is directed in the radial direction about the rotation axis of the pointer 11. The pointer 11 is made to emit light while being shielded so as not to spread to.
The space formed by the inner cylinder portion 51, the outer cylinder portion 52, and the connecting portion 53 of the middle case 50 constitutes an illumination space 54 surrounding the back side of the display plate 60 corresponding to the first instrument unit 10. A light source 71 for a display plate is provided in the illumination space 54. For example, the light sources 71 for the display plate are arranged at equal intervals on the circumference, and the shapes of the outer cylinder portion 52 and the connecting portion 53 are, for example, a bowl shape. It has a substantially concave curved surface and is illuminated by transmitting it from the back side of the display plate 60 as uniform light. When the light source 71 for the display board is turned off, the illumination space 54 is shielded from light and becomes a dark place.

The display plate 60 is composed of a translucent plate material formed of a predetermined resin, for example, a polycarbonate resin, and a light-shielding printing layer formed on the front side and / or the back side of the plate material. A part of the printed layer is in the shape of blank characters, and the display board 60 forms a design portion (index portion) (not shown) such as numerical values and scales to be indicated by the pointer 11. In addition, a translucent print layer may be formed on the punched character-shaped portion. Further, the display board 60 is provided with an opening 61 (see FIG. 1) for making the display area of the liquid crystal display unit 30 visible.

The instrument light source 70 includes a display board light source 71 and a pointer light source 72. The light source 71 for the display board is for transmitting and illuminating the display board 60. The pointer light source 72 is for causing the pointer 11 to emit light. The light source 71 for the display board and the light source 72 for the pointer are composed of, for example, an LED (Light Emitting Diode). The light source 71 for the display board and the light source 72 for the pointer are mounted on the front side of the circuit board 40.
A plurality of light sources 71 for the display plate are arranged around the axis of the rotation center portion 11a of the pointer 11 at equal intervals on the outer circumference (large diameter) of the inner cylinder portion 51 of the middle case 50. .. The light from the light source 71 for the display plate is guided through the light guide plate 70a and passes through the display plate 60 to illuminate the design unit (index unit).
The pointer light source 72 is arranged around the axis of the rotation center portion 11a of the pointer 11 at equal intervals on the inner circumference (small diameter) of the inner cylinder portion 51 of the middle case 50 to correspond to the rotation range of the pointer 11. Multiple are arranged. The light from the pointer light source 72 is incident on the rotation center portion 11a of the pointer 11, and causes the indicator portion 11b of the pointer 11 to emit light.
Each of the dial light source 71 and the pointer light source 72 is shielded from light by the inner cylinder portion 51 of the middle case 50 to illuminate the display plate 60 and emit light from the pointer 11.

The instrument device 100 is provided with a facing member (not shown) on the front side of the display board 60 so as to hide unnecessary parts of the instrument device 100. As the backing member, for example, a resin such as ABS (Acrylonitrile Butadiene Styrene copolymer) is used, and for example, it is black and has a light-shielding property. The counter member is provided with openings through which the first instrument unit 10, the second instrument unit 20, and the liquid crystal display unit 30 can be seen, and a transparent plate (not shown), for example, is provided so as to close these openings. , The glass is attached.

The lower case 80 is located on the back side of the middle case 50 with the circuit board 40 interposed therebetween. By combining the lower case 80 and the back member closed by the transparent plate, the lower case 80 becomes a substantially box-like shape and constitutes the housing of the instrument device 100.

According to such an instrument device 100, the speed of the vehicle is displayed by the pointer-type speedometer of the first instrument unit 10, the engine speed is displayed by the pointer-type tachometer of the second instrument unit 20, and the liquid crystal is displayed. The liquid crystal display 32 of the display unit (display device) 30 displays various information on the operating state of the vehicle, for example, the mileage as an odometer, as an image.

(Display device 1)
Next, the display device 1 according to the present embodiment will be described with reference to FIGS. 3 to 5.
The display device 1 of the present embodiment is configured as a liquid crystal display unit 30 of the instrument device 100.
As shown in FIGS. 3 and 4, the liquid crystal display unit 30 includes a front panel 31, a liquid crystal display (display unit) 32, a panel holder 33, a light source 34, and a circuit board 40.
The liquid crystal display 32 is mounted on the circuit board 40 via the panel holder 33. In the liquid crystal display 32, a flexible printed circuit board 32a for connecting to the circuit board 40 is extended. The flexible printed circuit board 32a has a surplus portion 32b in length, and is connected to a connector 41 provided on the mounting side (front side) of the liquid crystal display 32 of the circuit board 40. The circuit board 40 has a hole 42 for locating a surplus portion 32b of the length of the flexible printed circuit board 32a on the non-mounting side (back side) of the liquid crystal display 32. A liquid crystal display 32 is mounted on the panel holder 33. The panel holder 33 is located in the hole 42 and protrudes to the non-mounting side (back side) of the liquid crystal display 32, and the excess length portion 32b is positioned on the mounting side (front side) of the liquid crystal display 32 to have a surplus length. It has a protective cover portion 36 that covers the non-mounted side (back side) of the portion 32b.

The front panel 31 is made of, for example, a stainless steel plate made of a metal material, and has a panel edge portion 31b having a window portion 31a that makes a liquid crystal display visible, and a panel side portion 31c that protrudes from the panel edge portion 31b toward the back side. It is configured in a substantially frame shape with and. The front panel 31 is assembled so as to cover the liquid crystal display 32 from the front side, and the display area of the liquid crystal display 32 is located in the window portion 31a and is fixed to the panel holder 33 so that it can be visually recognized.
The front panel 31 is provided with two rectangular locking projections 31d on both sides of the panel side portion 31c, and each locking projection 31d is formed with a rectangular locking hole 31e.
Further, the panel holder 33 is formed so that the locking convex portion 33e having an inclined surface protruding downward and a horizontal plane at the lower end protrudes from the side surface corresponding to the locking hole portion 31e. The panel holder 33 and the front panel 31 are fixed by pushing the locking hole portion 31e along the inclined surface of the locking convex portion 33e and locking the locking hole portion 31e to the horizontal plane.
The front panel 31 is not limited to the case of using a metal material, and may be a molded product made of a resin material.

Although the details of the liquid crystal display 32 are not shown, liquid crystal molecules are enclosed between the front glass substrate and the rear glass substrate, and a polarizing film is attached to each glass substrate. Then, when a signal (voltage) corresponding to the amount of information from the outside is applied to the electrode portion (not shown) provided on each glass substrate, the operating state of the vehicle (for example, vehicle information such as the mileage of the vehicle) is displayed as an image. Will be done.

The flexible printed circuit board 32a is connected to the electrode portion of the liquid crystal display 32 and is for electrically connecting to the connector 41 of the circuit board 40. Although the details of the flexible printed substrate 32a are not shown, the flexible printed substrate 32a is provided with insulation protection except for the electrode portion after forming an electrode portion made of a copper foil, for example, by an etching method on a base film made of a synthetic resin made of a polyimide resin, for example. It is made by laminating a protective film. One end of the flexible printed circuit board 32a is fixed to the rear glass substrate of the liquid crystal display 32, and the other end is inserted into and connected to the connector 41 mounted on the circuit board 40. As a result, the electrode portion provided on the liquid crystal display 32 and the circuit provided on the circuit board 40 are connected via the connector 41.
The flexible printed circuit board 32a is provided with a surplus portion 32b in length so that the connection work can be performed with a margin when the flexible printed circuit board 32a is connected to the connector 41 of the circuit board 40. That is, with the liquid crystal display 32 fixed to the circuit board 40, the flexible printed circuit board 32a is formed longer than the distance from the liquid crystal display 32 to the connector 41 provided on the circuit board 40, and the long portion is the surplus portion 32b. To. Further, the flexible printed circuit board 32a is reinforced with a reinforcing member 32c such as paper as necessary for connection with the connector 41 and insertion of the panel holder 33 into the holding portion 35.

The panel holder 33 is made of white synthetic resin and is for mounting and fixing the liquid crystal display 32 on the circuit board 40. The panel holder 33 is formed in a substantially rectangular parallelepiped box shape with an open upper portion (front side portion), and includes a peripheral wall portion 33a which is a side surface and a bottom plate portion 33b.
A stepped portion 33c is formed in a frame shape on the upper surface of the peripheral wall portion 33a, leaving an outer edge portion, and a liquid crystal display 32 and a diffusion plate (not shown) can be mounted on the upper surface of the inside of the frame of the stepped portion 33c. ing. The outer edge of one side of the peripheral wall portion 33a of the panel holder 33 is cut out for leading out the flexible printed substrate 32a. Inside the stepped portion 33c, two locking portions 33d for positioning the liquid crystal display 32 at predetermined positions are formed on each side of the rectangle, and the locking portions 33d are positioned and engaged by contacting the locking portions 33d. It will be stopped. On the outer surface of the peripheral wall portion 33a, locking convex portions 33e for locking the locking hole portion 31e of the front panel 31 described above are integrally provided at four locations, and are mounted on the stepped portion 33c and positioned. The vertical position of the liquid crystal display 32 is fixed by the front panel 31. The panel holder 33 is provided with a light source 34 for illuminating the liquid crystal display 32 mounted on the circuit board 40 on the bottom plate portion 33b, for example, an opening 33f for transmitting the illumination light of a light emitting diode, and the illumination light from the light source 34 is emitted. , The liquid crystal display 32 is uniformly illuminated by a diffuser plate (not shown) mounted on the back surface of the liquid crystal display 32.

The panel holder 33 is provided with a pair of holding portions 35 facing each other on both sides to support the peripheral wall portion 33a from which the flexible printed substrate 32a of the liquid crystal display 32 is led out along the peripheral wall portion 33a of the flexible printed substrate 32a. There is. Each holding portion 35 has an outer end portion fixed to the peripheral wall portion 33a and is formed in parallel with the peripheral wall portion 33a through a gap, and is separated in the left-right direction by a pair of facing holding portions 35, but vertically. A groove-shaped gap is formed to penetrate. The flexible printed substrate 32a can be inserted from above (front) into the groove-shaped gap penetrating the upper and lower parts of the holding portion 35, and both sides can be pressed and held between the groove portions.
The flexible printed circuit board 32a includes a surplus portion 32b having a length sufficient for connection to the connector 41 of the circuit board 40 even when the base end portion is held by the holding portion 35 in the panel holder 33. ing.
The panel holder 33 is provided on the outer surface of the peripheral wall portion 33a with hook-shaped engaging portions 33g that engage with the circuit board 40 protruding downward from the bottom plate portion 33b and provided at two locations on each side of the circuit board 40. It is positioned and fixed by engaging with the engagement hole 40a.
The holding portion 35 is not limited to the case where it is provided on the panel holder 33, but may be provided on the front panel 31. Further, the holding portion 35 is not limited to being integrally provided on the panel holder 33 or the front panel 31, but may be attached by pressing the flexible printed substrate 32a as a separate body.

The circuit board 40 of the liquid crystal display unit 30 is also used as the circuit board 40 of the instrument device 100, and as described above, the liquid crystal display unit 30 is equipped with a light source 34 or the like by a light emitting diode that illuminates the liquid crystal display 32. In addition, a control unit for driving the instrument device 100 and the like are mounted. Further, the circuit board 40 has a connector 41 mounted on the front side for connecting the flexible printed circuit board 32a of the liquid crystal display 32.

The circuit board 40 is formed with a rectangular through-hole portion 42 for locating a surplus portion 32b of the length of the flexible printed circuit board 32a. The hole 42 is formed between the panel holder 33 and the connector 41, which are positioned and fixed by engaging the hook-shaped engaging portion 33g with the engaging hole 40a of the circuit board 40. The surplus portion 32b of the flexible printed circuit board 32a is positioned in the hole 42 through which the rectangle penetrates, and is curved so as to hang down toward the back side of the circuit board 40. The hole portion 42 has a width B in which both sides of the surplus portion 32b of the flexible printed substrate 32a do not come into contact with the end surface 42a of the hole portion 42.

The liquid crystal display unit 30 includes a protective cover 36 that protects the excess portion 32b of the length of the flexible printed circuit board 32a and prevents contact when mounting components on the circuit board 40 or the like.
The protective cover 36 is provided integrally with the panel holder 33 and is formed in a laterally substantially semi-cylindrical shape with both ends closed in a substantially semi-circular shape. The protective cover 36 includes a contact prevention portion 36a that prevents the flexible printed substrate 32a from coming into contact with the end surface 42a of the hole portion 42. The contact prevention portion 36a is formed so as to extend the semi-cylindrical rectangular side surface portion 36b upward (front side) and cover the inside of the end surface 42a of the hole portion 42 through which the circuit board 40 penetrates. The protective cover 36 is arranged so that the semi-cylindrical curved side surface portion 42b protrudes from the hole portion 42 to the lower side (back side) of the circuit board 40.
The contact prevention portion 36a may be formed so as to be the same as or slightly protruding from the surface of the circuit board 40, and contact can be prevented by covering the end surface 42a of the hole portion 42. Further, the contact prevention portion 36a may be provided so as to cover at least the end surface 42a of the hole portion 42 on the connector 41 side. On the end faces 42a of the other three sides of the hole portion 42, the width B of the hole portion 42 is widened, and the base end portion of the flexible printed substrate 32a is held by the holding portion 35 of the panel holder 33. Since contact is unlikely to occur, it may be omitted.

By providing such a protective cover 36 in the panel holder 33 so as to be located inside the hole 42 of the circuit board 40, the surplus portion 32b of the flexible printed circuit board 32a of the liquid crystal display 32 mounted on the panel holder 33 is provided. Is located inside the protective cover 36, and is completely covered from the back side of the circuit board 40. As a result, the liquid crystal display 32 is mounted on the circuit board 40 via the panel holder 33, and after the surplus portion 32b of the flexible printed circuit board 32a is connected to the connector 41, the circuit board is mounted on the surplus portion 32b covered with the protective cover 36. From the back side of the 40, it is possible to prevent the operator and the tool from coming into contact with each other, causing a connection failure with the connector 41 and damaging the surplus portion 32b, and ensuring the reliability of the connection. Therefore, it is not necessary to reconfirm the connection state of the flexible printed circuit board 32a to the connector 41, and the assembly work can be performed quickly.
The excess portion 32b of the length of the flexible printed substrate 32a is curved and hangs down inside the protective cover 36, but in the hung state, it does not come into contact with the inner surface of the curved side surface portion 36b of the protective cover 36. It is preferable to keep it in a state. By doing so, it is possible to prevent the surplus portion 32b of the flexible printed substrate 32a from coming into contact with the protective cover 36 and rubbing due to vibration of the vehicle or the like, and it is possible to prevent damage or the like. Therefore, dimensions such as the depth and the semiperimeter of the side surface portion 36b of the protective cover 36 may be appropriately determined depending on the length of the surplus portion 32b. On the other hand, the depth (length in the extending direction of the surplus portion 32b) L of the hole portion 42 is the inner surface of the protective cover portion 36 of the panel holder 33 even if the surplus portion 32b hangs down so as to be curved toward the back side of the circuit board 40. The depth (length) L is set so as not to come into contact with the surplus portion 32b, and the hole portion 42 has a size sufficient for the surplus portion 32b.

Further, it is possible to prevent the flexible printed circuit board 32a from coming into contact with the end surface 42a of the hole 42 formed in the circuit board 40 by the contact prevention portion 36a of the protective cover 36, and to prevent damage due to rubbing against the sharp end surface 42a. Can be done.
Further, since the surplus portion 32b of the flexible printed circuit board 32a is curved and covered with the protective cover 36 from the back side of the circuit board 40, it is possible to prevent the flexible printed circuit board 32a from being bent.
Further, since the base end portion of the flexible printed substrate 32a is held along the peripheral wall portion 33a of the panel holder 33 by the holding portion 35 of the panel holder 33, the flexible printed substrate 32a is more reliably curved inside the protective cover 36. Can be positioned. As a result, it becomes difficult to make contact from the front side of the circuit board 40, and it is possible to reliably avoid a poor connection with the connector 41.

According to the embodiment described above, the following effects are obtained.
(1) The liquid crystal display unit (display device) 30 is mounted with a liquid crystal display (display unit) 32, a flexible printed substrate 32a extending from the liquid crystal display 32, and a liquid crystal display 32, and the mounting side (front side) of the liquid crystal display 32 is mounted. ), The circuit board 40 includes a circuit board 40 provided with a connector 41 connected to the flexible printed board 32a, and the circuit board 40 has a surplus portion 32b of the length of the flexible printed board 32a on the non-mounted side of the liquid crystal display 32 (). The liquid crystal display 32a has a hole 42 located on the back side), and the liquid crystal display 32a has a protruding length surplus portion 32b located inside from the hole 42 to the non-mounting side of the liquid crystal display 32a. It has a protective cover portion 36 that covers the mounting side.
According to such a configuration, even if the flexible printed circuit board 32a is provided with an extra length portion 32b for connection work to the connector 41, the flexible printed circuit board 32a can be made to hang down to the back side through the hole 42 formed in the circuit board 40 and hang down. Since the surplus portion 32b is covered from the back side by the protective cover 36, the surplus portion 32b of the flexible printed circuit board 32a is guided to the back side of the circuit board 40 which does not hinder the work, and the protective cover 36 works from the back side. It is possible to prevent contact with people and tools. As a result, no external force is applied to the surplus portion 32b of the flexible printed circuit board 32a, no connection failure with the connector 41 occurs, and it is possible to secure the reliability of the connection without the need to reconfirm the connection state.

(2) In the liquid crystal display unit (display device) 30, the protective cover portion 36 is formed with a contact prevention portion 36a that covers the end surface 42a of the hole portion 42 and prevents contact of the excess length portion 32b.
According to this configuration, the end surface 42a of the hole 42 where the surplus portion 32b of the flexible printed circuit board 32a is located is covered with the contact prevention portion 36a of the protective cover 36, so that the end surface of the hole 42 of the circuit board 40 is sharp. It is possible to prevent the excess portion 32b of the flexible printed circuit board 32a from coming into contact with the flexible printed circuit board 32a, and it is possible to prevent damage even if vibration or the like is applied.

(3) In the liquid crystal display unit (display device) 30, the protective cover portion 36 is integrally formed with the panel holder 33 of the liquid crystal display 32.
According to this configuration, by mounting the liquid crystal display 32 on the panel holder 33, the surplus portion 32b of the flexible printed circuit board 32a can be protected by the integrated protective cover 36, and a step of assembling the protective cover 36 independently is required. However, the assembly work can be performed efficiently. Further, by integrally molding the panel holder 33 with resin at the same time as manufacturing, the manufacturing becomes easy.

(4) The liquid crystal display unit (display device) 30 includes a holding portion 35 in which the liquid crystal display 32 holds the base end portion of the extended flexible printed substrate 32a along the side surface of the liquid crystal display 32.
According to such a configuration, since the base end portion of the flexible printed circuit board 32a is held by the holding portion 35 and the tip end portion is inserted into the connector 41, the flexible printed circuit board 32a can be positioned on the circuit board 40 in a more stable state. , Damage due to vibration, etc. can be prevented.

(5) In the liquid crystal display unit (display device) 30, the holding portion 35 is integrally formed with the panel holder 33, and the flexible printed substrate 32a is inserted from the mounting side (front side) of the liquid crystal display 32.
According to such a configuration, the flexible printed circuit board 32a can be easily inserted into the holding portion 35 from above, and the base end portion of the flexible printed circuit board 32a is held by the holding portion 35 and the tip portion thereof is inserted into the connector 41. Therefore, it can be positioned on the circuit board 40 in a more stable state, and damage due to vibration or the like can be prevented. Further, by integrally molding the holding portion 35 with resin at the same time as manufacturing the panel holder 33, the manufacturing becomes easy.

In the above embodiment, the case where the display device according to the present invention is applied to the instrument device has been described as an example, but the display device may be applied not only to the vehicle but also to a display device mounted on a vehicle such as an airplane or a ship. ..
Further, the display unit is not limited to a liquid crystal display, and can be widely applied when connecting to a connector via a flexible printed substrate.
Further, the present invention is not limited to each of the above embodiments, and can be carried out in various embodiments.

1 Display device 100 Instrument device 10 First instrument unit 11 Pointer 11a Rotation center 11b Indicator 11c Pointer cap 12 Stepping motor 12a Rotation shaft 20 Second instrument unit 21 Guideline 30 Liquid crystal display unit (display device)
31 Front panel 31a Window 31b Panel edge 31c Panel side 31d Locking protrusion 31e Locking hole 32 Liquid crystal display 32a Flexible printed circuit board 32b Surplus part 32c Reinforcing member 33 Panel holder 33a Peripheral wall part 33b Bottom plate part 33c Step part 33d Locking part 33e Locking convex part 33f Opening part 33g Engaging part 34 Light source 35 Holding part 36 Protective cover 36a Contact prevention part 36b Side part 40 Circuit board 40a Engagement hole 41 Connector 42 Hole part 42a End face 42b Side part 50 Medium case 51 Inner cylinder 52 Outer cylinder 53 Connecting part 54 Lighting space 60 Display plate 61 Opening 70 Instrument light source 70a Light source plate 71 Display plate light source 72 Pointer light source 80 Lower case B Hole width L Hole depth

Claims (5)

Display unit and
A flexible printed circuit board extended from the display unit and
The display unit is mounted, and a circuit board provided on the mounting side of the display unit and having a connector to be connected to the flexible printed circuit board is provided.
The circuit board has a hole for locating an excess portion of the length of the flexible printed circuit board on the non-mounting side of the display unit.
The display unit has a protective cover portion that protrudes from the hole portion to the non-mounting side of the display unit, positions the surplus portion of the length inward, and covers the non-mounting side of the surplus portion of the length. ,
A display device characterized by that. The protective cover portion is formed with a contact prevention portion that covers the end surface of the hole portion and prevents contact with the excess portion of the length.
The display device according to claim 1. The protective cover portion is formed integrally with the panel holder of the display panel.
The display device according to claim 1 or 2. The display unit includes a holding portion that holds the base end portion of the extended flexible printed circuit board along the side surface of the display unit.
The display device according to any one of claims 1 to 3. The holding portion is formed integrally with the panel holder, and the flexible printed board is inserted from the mounting side of the display unit.
The display device according to claim 4.

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