JPH1082664A - Instrument unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measuring-instrument unit which can be assembled easily while a compact configuration is being maintained. SOLUTION: A circuit board 7 is arranged and installed at an analog measuring-instrument body 1 in such a way that a part of an electronic display 6 overlappes with the circuit board 7. The electronic display 6 is provided with a holder 9 which houses a display panel 8 and with a lead pin 10 by which the display panel 9 and the circuit board 7 are connected electrically. One side of the lead pin 10 which is arranged in a direction nearly perpendicular to the face of the display panel 8 on a side which is not overlapped with the measuring-instrument body 1 is connected to an electrode part in the end part on one side of the display panel 8, and the other end of it is soldered and fixed to the circuit board 7. A coupling piece 22 comprising a coupling claw 21 which is coupled and attached to the circuit board 7 is installeci at the holder 9. In adition, a support 24 which comes into contact with the circuit board 7 is installed integrally with the holder 9 in a part near a corner on the side opposite to a side on which the lead pin 10 is arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instrument unit in which an electronic display is partially overlapped with an analog instrument body used for a vehicle instrument, for example.
In particular, it relates to the mounting of the instrument unit.

[0002]

2. Description of the Related Art As shown in FIG. 3, a conventional instrument unit has a cross-coil instrument main body 1, a light guide plate 2 made of a light-transmitting resin disposed in front of the instrument main body 1, and a light guide plate 2. A cross-coil type instrument 5 including a display plate 3 and a pointer 4 disposed on the front surface of the light plate 2, and a liquid crystal display partially overlapped with the instrument main body 1 of the cross-coil type instrument 5. And a circuit board 7 on which the liquid crystal display 6 and the cross-coil instrument 5 are mounted and fixed.

The liquid crystal display 6 has a rectangular display panel 8.
And a holder 9 for housing and holding the display panel 8, and lead pins 10 for electrically connecting the display panel 8 to the circuit board 7. A plurality of electrode portions provided on one side end of the panel 8 are connected in a direction substantially perpendicular to the surface of the display panel 8. Further, in order to align the lower end positions of the lead pins 10 and facilitate the insertion into the lead pin insertion holes 11 provided on the circuit board 7, a guide wall 13 provided with a guide hole 12 for inserting and guiding the lead pins 10 and a side of the guide wall 13 are formed by a circuit. A mounting boss 14 for mounting and fixing to the substrate 7 is provided on the holder 9, and the holder 9 is formed integrally with the light guide plate 2.

A display unit in which the cross-coil instrument 5 and the liquid crystal display 6 are integrated is mounted on a circuit board 7 on which electronic components for driving the cross-coil instrument main body 1 and the liquid crystal display 6 are mounted. The lead pins 10 hanging from the display panel 8 are inserted into lead pin insertion holes 11 provided in the circuit board 7 and fixed by soldering.

[0005] By arranging a part of the liquid crystal display 6 on the cross-coil instrument main body 1 so as to be overlapped, the projected area can be reduced and the instrument unit can be made compact.

[0006]

However, in the above-mentioned conventional example, a display unit in which a cross-coil type instrument main body 1 and a liquid crystal display 6 are integrated is mounted on a circuit board 7 with screws 1.
After mounting and fixing with 5, the lead pins 10 of the liquid crystal display 6 had to be manually soldered one by one to the circuit board 7, and the workability was extremely poor.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide an instrument unit that can be easily assembled while maintaining a compact configuration.

[0008]

According to the present invention, in order to solve the above-mentioned problems, a light guide plate is provided in front of an instrument main body, a display plate is provided in front of the light guide plate, and an operation of the instrument main body is performed. An analog instrument with a pointer that rotates in accordance with the analog instrument, a circuit board that is located behind the analog instrument and mounts and fixes the analog instrument, and a square on the front side of a synthetic resin holder And a plurality of lead pins that are arranged in a direction substantially perpendicular to the surface of the display panel, one of which is connected to an electrode portion on one side edge of the display panel, and the other is solder-fixed to the circuit board. An electronic display device comprising: an electronic display device, wherein the electronic display device is arranged such that a part of a side opposite to a side on which the lead pins are arranged is overlapped between the instrument main body and the display plate. On the holder Wherein the provided locking means for the circuit board and the engagement, the holder portion of the opposite side to the side having an array of the lead pin, the circuit board as an electronic display from tipping provided abutting struts holder integrally. Further, a positioning pin for positioning the electronic display and the circuit board is provided at the lower end of the support. Further, a positioning means is provided on the light guide plate and the holder.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION An electronic display is arranged such that a part of a side opposite to a side on which a plurality of lead pins to be solder-fixed to a circuit board are arranged is overlapped between an instrument main body and a display panel. This makes it possible to reduce the projected area.In addition, in the holder portion that houses the display panel, a locking means for locking with the circuit board and a post that abuts the circuit board so that the electronic display does not tilt with the holder. By providing them integrally, it is possible to automate the soldering work in a state where the electronic display and the circuit board are engaged.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, an instrument unit according to the present invention comprises an analog instrument 5, an electronic display 6, and a circuit board 7 to which these are attached and fixed. A part of the container 6 is configured to overlap. The analog instrument 5 includes a cross-coil instrument main body 1 for a vehicle speedometer, a light guide plate 2 disposed in front of the instrument main body 1 and made of a light-transmissive and colorless resin, and a light guide plate 2. Display board 3 with speed display provided on the front
And a pointer 4 which rotates according to the operation of the instrument main body 1 and instructs a speed display provided on the display panel 3.

The pointer 4 is formed so as to guide light from a light source (not shown) to the light guide plate 2 so that the pointer 4 shines. In addition, a window 16 for making a display panel 8 of an electronic display 6 to be described later visible is provided at three places of the display plate located below the hands 4. An air space 17 for disposing an electronic display 6 to be described later is provided at two places of the light guide plate located below the hands 4, and the left and right sides of the air space 17 are positioned with the electronic display 6. A notch 18 is provided.

The electronic display 6 includes a rectangular liquid crystal display panel 8 for displaying the traveling distance of the vehicle, a holder 9 made of a light-transmitting synthetic resin having an open front surface for accommodating the display panel 8, and the holder 9. A frame 19 is provided between the holder 9 and the display panel 8 for holding the periphery of the display panel 8 housed therein, and receives light from a light source (not shown) provided on the back side. And a lead plate 10 which is connected to a plurality of electrodes (not shown) provided at one end of the display panel 8 in a direction substantially perpendicular to the surface of the display panel 8.

The lower end of the lead pin 10 is inserted into a lead pin insertion hole 11 provided in the circuit board 7 and fixed by soldering. In order to align the lower end position of the lead pin 10 and facilitate insertion into the lead pin insertion hole 11, the lead pin 10 is inserted. The holder 9 is provided with a guide wall 13 provided with a guide hole 12 for guiding the insertion. A mounting boss for screwing the holder to the circuit board may be provided near the guide wall as in the conventional example.

On the left and right sides of the holder 9, holders are provided.
That is, a locking piece 22 having a locking claw 21 for fixing the electronic display 6 to the circuit board 7, and a rib 23 for positioning the notch 18 provided on the light guide plate 2 described above are provided. The locking piece 22 may be provided at any position of the holder 9. Further, at a position near the corner of the holder 9 on the side opposite to the side on which the lead pins 10 are arranged, a support post 24 that contacts the circuit board 7 is provided integrally with the holder 9,
A positioning hole 25 provided in the circuit board 7 is provided at a lower end of the support post 24.
Is provided with a positioning pin 26 to be inserted into the device. The positioning pins 26 may be on the side where the lead pins 10 are arranged.

The circuit board 7 has a mounting hole 27 for mounting and fixing the cross-coil instrument 5 and, as described above, a lead pin insertion hole 1 for inserting the lead pin 10 and fixing it by soldering.
1. A positioning hole 25 and an engagement hole 28 for engaging with the positioning pin 26 and the locking piece 22 provided on the holder 9 are formed. Further, electronic components for driving the cross-coil instrument 5 and the electronic display 6 are fixed by soldering.

In the method of assembling the instrument unit configured as described above, first, the positioning pins 26 provided on the holder 9 of the electronic display 6 are inserted into the positioning holes 25 of the circuit board 7. Almost simultaneously with this insertion, the lower end of the lead pin 10 and the locking piece 22 enter the lead pin insertion hole 11 and the engagement hole 28 of the circuit board 7, and the locking claw 21 provided on the locking piece 22 engages with the back surface of the circuit board 7. Stopping, the electronic display 6 is fixed to the circuit board 7. In this state, the lead pins 10 are soldered to the circuit board 7, and this soldering operation may be automatically performed simultaneously with other electronic components.

Next, the cross-coil instrument 5 is attached and fixed to the circuit board 7. Since the cross-coil instrument main body 1 is disposed behind the electronic display 6 so as to be wrapped, the cross-coil instrument 5 is mounted. The user slides from above (to slide the circuit board 7 to which the electronic display 6 is attached, if the cross-coil instrument 1 is considered fixed). At this time, the ribs 23 provided on the holder 9 are inserted into the notches 18 provided on the light guide plate 2 to position the cross-coil instrument 5 and the electronic display 6. The positioning means is not limited to the notch 18 and the rib 23, but may be any method, any shape, and any position.

In this embodiment, the analog type instrument is a cross-coil type speed meter and the electronic display is a liquid crystal display. However, the present invention is not limited to this. Also, a plurality of instruments and indicators may be mounted and fixed to the circuit board.

[0019]

According to the present invention having the above-described structure, the following effects can be obtained. The analog type instrument and the electronic display are separated, and the analog type instrument main body is overlapped with the electronic display, and the holder constituting the electronic display is provided with locking means for locking with the circuit board. Since the automatic display and the other electronic components can be automatically soldered while maintaining the simple structure and the electronic display attached to the circuit board, the workability is extremely easy. The provision of the supporting column for contacting the circuit board on the holder opposite to the side on which the lead pins are arranged prevents the electronic display from becoming cantilevered and preventing the electronic display from tilting backward. In addition, providing the positioning pins for the circuit board at the lower end of the support means that the electronic display and the analog type instrument are overlapped and the electronic display does not need to be provided with a separate positioning pin from the support at a place where there is no space. And the circuit board can be aligned. In addition, since the light guide plate and the holder are provided with the positioning means, positioning can be performed even if the electronic display and the analog instrument are separate bodies.

[Brief description of the drawings]

FIG. 1 is a side view including a partial cross section of an instrument unit showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of an instrument unit showing the embodiment of the present invention.

FIG. 3 is a side view including a partial cross section of an instrument unit showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Instrument main body 2 Light guide plate 3 Display board 4 Pointer 5 Cross coil type instrument (analog type instrument) 6 Liquid crystal display (electronic display) 7 Circuit board 8 Display panel 9 Holder 10 Lead pin 18 Notch (positioning means) 21 Stop pawls (locking means) 22 locking pieces (locking means) 23 ribs (positioning means) 24 columns 26 positioning pins

Claims (3)

[Claims] 1. An analog device comprising: a light guide plate disposed in front of an instrument body; a display panel disposed in front of the light guide plate; and a pointer which rotates according to the operation of the instrument body. An analog instrument, a circuit board arranged behind the analog instrument, for mounting and fixing the analog instrument, and a square display panel on the front side of a synthetic resin holder are stored. An electronic display comprising a plurality of lead pins arranged in a substantially vertical direction, one of which is connected to an electrode portion at one side of the display panel, and the other of which is solder-fixed to the circuit board. The instrument has a part on the side opposite to the side on which the lead pins are arranged overlapped between the instrument main body and the display panel, and the holder is engaged with the circuit board. Means; An instrument unit characterized in that a support column, which abuts on a circuit board, is provided integrally with a holder at a holder portion on a side opposite to a side on which dopins are arranged so that the electronic display does not tilt. 2. The instrument unit according to claim 1, wherein a positioning pin for positioning the electronic display and the circuit board is provided at a lower end of the support. 3. The instrument unit according to claim 1, wherein positioning means is provided on the light guide plate and the holder.