JP2876960B2 - Instrument equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instrument device mounted on a vehicle, and more particularly to a combination-type instrument device in which a plurality of measurement values are indicated by a plurality of instrument bodies.

[0002]

2. Description of the Related Art A plurality of measurement values such as a running speed of a vehicle, a remaining fuel amount, and a water temperature are indicated by a combination-type instrument device provided on a dashboard in a vehicle compartment.
Electrical instrument bodies, such as cross-coil instruments, have been used.

[0003] Generally, such an instrument device is provided with a printed circuit board in which a driving circuit component is mounted in an instrument housing as shown in Japanese Patent Application Laid-Open No. 1-122,739, for example. A variety of electric instrument main bodies are arranged and connected on the upper side, and an instrument housing containing the various instrument main bodies is assembled and fixed to a dashboard of a vehicle.

[0004] By the way, the quietness of the vehicle interior of the vehicle has been considerably improved by the development of the soundproof structure of the vehicle body. The wind noise at the air outlet is starting to stand out. In other words, during the rapid heating and the rapid cooling, the wind force is increased at the fins at the outlets in order to increase the wind force, which is becoming a hindrance as noise.

[0005] Such wind noise is generated by increasing the wind force, but the same cooling and heating effect can be obtained by increasing the absolute amount of warm air and cool air without increasing the wind force. Attempts have been made to reduce the generation of wind noise due to such wind blowing by making the ventilation duct passing through the board thicker.

[0006] The increase in the occupied area in the dashboard due to the increase in the size of the ventilation duct inevitably leads to a reduction in the thickness of the instrument installed in the dashboard, that is, the depth of the instrument projecting into the dashboard. request such must be reduced occurs, the in meter equipment of the conventional structure it had come to the limit.

[0007]

In the conventional instrument system, the depth of the instrument system, that is, the width of the vehicle occupied in the dashboard is large. the reduction of the board projecting amount toward the outside, that the driver's side of the inevitably dashboard occupied width decreases to dash board of the meter device will result in that the instrument device front is pushed out, the dashboard around the appearance design However, there is a problem that the driver feels a sense of oppression due to the closeness of the instrument display surface.

[0008]

SUMMARY OF THE INVENTION According to the present invention, an instrument body is provided on the surface of a printed circuit board, and a signal terminal of the instrument body and an electric circuit pattern of the printed circuit board are electrically connected to each other and fixed to the printed circuit board. A light emitting diode is provided on the surface of the printed circuit board, and a display panel provided with a light-transmitting index corresponding to the measurement item of the instrument body is provided on the surface of the printed circuit board. is fixed guidance consisting of a light-transmitting member at its distal end protrudes to the front side through the through portion of the display panel rotation shaft interlocked, light emitting diodes
The reflection plate that reflects the light of
Side and on the back side of the display panel, from the light emitting diode
The light guide that guides the light to the pointer between the printed circuit board and the display board
And place the upper case on the front side of the printed circuit board.
The rear side of the printed circuit board is covered with a lower case .

[0009]

[Function] To reduce the depth of the instrument, that is,
Chi, can achieve thinner meter device, projecting into the meter device backwards, i.e. occupancy width into the dashboard when the attachment instrument apparatus to a vehicle dashboard is reduced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As an electric instrument main body applied to the instrument device of the present invention, an electric magnet instrument main body or a motor instrument as long as it has a movable portion movable by input of a drive signal.
Any of the main bodies may be used, but a preferable one for achieving a reduction in thickness is disclosed in, for example, JP-A-1-69,914.
Cross coil type meter main body and Japanese Utility Model disclosed in JP 64
Step motor type instrument book disclosed in No. 25,757
Easy to adopt body . In the embodiment, a cross coil type instrument book
A description will be given of a configuration in which a body is adopted, and four instrument bodies are juxtaposed to indicate four types of measured values.

FIG. 1 is a front view showing a typical instrument layout applied to the instrument apparatus of the present invention. The instrument apparatus 1 includes a traveling speedometer 2, an engine, and an internal storage instrument. The tachometer 3, the fuel gauge 4, and the water temperature gauge 5 each use a cross-coil instrument as their instrument bodies. Other display information provided in the instrument device 1 includes a gear position display section 6, an odometer 7 and a warning display section 8, and the display sections 6 and 8 are light emitting diodes (hereinafter simply referred to as LEDs). ), The odometer 7 is located in the velocimeter 2 and is constituted by a liquid crystal display panel, and an LED is arranged behind the illuminator to illuminate. Note that a fluorescent display tube may be used instead of the liquid crystal display panel.

Each instrument 2, 3, 4, 5 in the instrument device 1
Has separate display panels 9, 10, 11, and 12, each of which is provided with graduations, numbers, characters, and other indicators 13, 14, 15, and 16 for displaying measurement items on its surface. Indicators 13, 14, 1
5 and 16 are configured to be translucent.

[0013] each panel 9, 10, 11, 12 and the display surface of the other display unit 6, 8 to allow fluoroscopic and the upper case 17 also serving as a dial which covers between them, arranged in front of its The instrument covers the periphery and adjusts the appearance of the instrument device 1.

As shown in FIG. 2, the instrument device 1 is a cross-coil instrument main body as an instrument main body of each of the instruments 2, 3, 4, and 5.
18, 19, 20, 21 are fixed on the surface side of the printed circuit board 22 at intervals, and the display panels 9, 10 of the instruments 2, 3, 4, 5 are mounted on the surface side of the printed circuit board 22. , 11, 12 indicators 1
Plural LEDs 23 and LED2 that illuminate 3, 14, 15, 16
The horn-shaped reflectors 24, 25, 26, and 27 that reflect the light of 3 toward the display panels 9, 10, 11, and 12 are disposed, and the display panels 9, 10, 11, and 12 are disposed in front of the reflectors. Have been.

Each instrument body 18, 19, 20, 21 includes a rotating magnet as a movable part that follows a change in a driving magnetic field generated by a driving signal to each of the wound cross coils. The pointers 28, 29, 30, 31 made of a translucent member are fixed to the tip of the rotating shaft to be installed, and can be read in comparison with the scale index provided on the display boards 9, 10, 11, 12 of each instrument. The change of the measurement item indicated by each instrument can be known. The pointers 28, 29, 30, 31 are light guides 32, 33, 34, disposed between the printed circuit board 22 and the display panels 9, 10, 11, 12.
By 35, the light from the LED 23 disposed on the printed circuit board 22 is guided below the bases of the hands 28, 29, 30, 31 to be illuminated.

The meter unit apparatus 1 is protected by the instrument body 18, 19, 20, 21 resin or metal lower case 36 to cover the back of the printed circuit board 22 with a fixed. This is fixed by the lower case 36 and the pre-<br/> cement substrate 22 and the upper case 17 and the screw 37. The print substrate 22 screw insertion hole is formed, threaded portion of the screw 37 in the lower portion of the upper case 17 is formed, the printed circuit board 22 is clamped and held between the upper case 17 and the lower case 36. In the present invention, the lower case 36 is
Is a single plate covering the opening of the lower case, for example,
36 is a box-shaped, and the upper case 17 rather good even as a single plate, it is appropriate freedom.

Each of the instrument main bodies 18, 19, 20, 20 in the above configuration
Fixing and electrical connection between the 21 and the printed circuit board 22 and the connection relationship of the LED 23 in the gear position display section 6 will be described. Note that the upper case 17
Display form in the gear position display section 6 and the warning display unit 8 to form a top case 17 of a transparent member, its
Opaque background color printing on the front side of the display so that the translucent display portions such as the display portions 6 and 8 are left or as shown in FIGS.
As described above , it is optional to form a see-through portion with a hole in the opaque plate and arrange a separate transparent design plate there.

As shown in FIG. 3, in the present embodiment,
Printed circuit board 22 is a high-density circuit
This will be described with reference to a substrate on which mounting is performed. However, for example, printed circuit board 22 is provided with a driving circuit external to, the connection cord so as to supply a drive signal through the path pattern 38 of the printed circuit board 22, on the printed board 22 mounting only the necessary minimum of circuit elements location Alternatively, a single-sided pattern substrate may be used .

[0019] On both surfaces of the printed circuit boards 22 are such as to implement the driver circuit and the circuit elements of the instrument, electrical path pattern 38 serving as a signal transmission path and mounting position of each instrument body 18, 19, 20, 21 LED 23 Are printed on the electrical connection between the display units 6 and 8 and the drive circuit inside the meter device.

[0020] Here, to explain in detail the structure Te to the running speed meter 2, cross coil type meter main body 18 serving as a speed meter 2 meter the body, it intersects the resin of the bobbin case 39 coils
A rotating magnet (not shown) as an internal movable body is moved in the direction of its composite magnetic field by applying a drive signal to the coil 40 and applying a two-phase current that varies with a sine wave and a cosine wave, for example. The running speed of the vehicle is indicated by an angle.

The instrument main body 18 has an arm portion 41 extending downward integrally with the bobbin case 39. A conductive pin terminal 42 is buried in the arm portion 41, and a coil 40 is connected to the upper end thereof. The lower end is penetrated through the printed circuit board 22 and connected to the electric circuit pattern 38 by soldering. As a result, the meter main body 18 is fixed on the printed circuit board 22 and makes an electrical connection with the electric circuit pattern 38 to issue a measurement instruction by the pointer 28 fixed to the tip of the rotating shaft 43. Reference numeral 44 denotes a cup-shaped iron shield case, which shields the coil 40 from external influences on the magnetic field. Incidentally, the meter body 18, fixed to a printed circuit board 22 may be a dedicated fixing means separately hooks, screws or the like and electrically connected by a connection terminal form and meter body 18
Can be freely selected depending on the type of the user.

3 and 4, a display plate 9 is provided on the back of a transparent or translucent resin plate 45 made of polycarbonate or the like.
The white semi-transmissive printed layer 46 subjected only indicator 13 points, it is subjected to blackish ground color printed layer 47 of opaque to the entire back surface of the resin plate 45 except for the display form.

Behind the display area of the display board 9, a printed circuit board
An LED 23 for transmitting and illuminating the index 13 on the display panel 9 is provided on the display panel 22, and a horn-shaped white reflector 24 is provided for efficiently illuminating the index 13. A white printed layer 48 is formed on the printed circuit board 22, which is surrounded by the reflection plate 24 below the display panel 9, in order to increase illumination efficiency. Also, the LED which is a part of the electric circuit pattern 38
In the conductive pad 23, a large amount of current flows to increase the brightness of the LED 23, the amount of heat generated by the LED 23 is large, and the area of the conductive pad is formed large to radiate this heat. By further be covered with <br/> white printed layer 48 on the conductive pads are covered with a resist (not shown), which increases the illumination efficiency. This is the same for the display units 6 and 8.

The light guide 32 is provided on the printed circuit board 22.
The light of the ED 23 is guided and illuminated by a pointer 28 made of a light guide material, and the light guide 32 is fixed to the arm 41 of the instrument main body 18. The reflection plate 24, a Takeno come around the light to prevent the site of odometer 7 incorporated in the running speed meter 2, and so as to efficiently illuminate, the partition wall 49 is provided. The partition wall 49 protrudes toward the display panel 9 and is in contact with the display panel 9.

[0025] As shown in FIGS. 5 and 6, the light guide 32, because of the use of high directivity LED 23 as a light source, or combining a plurality of light receiving surfaces 50 toward the convex surface 51 LED 23, a plurality of different It may have a curvature and a surface in which different curvatures are continuously combined, and may be set as appropriate according to the type of light source and the condition of instrument illumination. FIG.
As shown in FIG. 5, a white body 48 is formed on the printed circuit board 22 by integrally forming a cylindrical body 52 surrounding the instrument main body 18 on the reflection plate 24 and providing a hole 53 in which the LED 23 as a light source is viewed.
The lighting can be performed effectively without the need .

At a position adjacent to the traveling speedometer 2, a gear position display section 6 is provided. The display section 6 is configured so that a gear position mark can be transmitted and illuminated at a corresponding position opening of the upper case 17. Another display plate 54 is fixed. The display plate 54 has the same basic configuration as the display plate 9 in the traveling speedometer 2, but is printed with non-light transmission except for a light transmission display portion.

The display of the gear position display section 6 includes:
Lighting illumination by an LED 23 connected on a printed circuit board 22 is used. LED23 is a display plate of the gear position display section 6.
One or more are disposed below each gear position display position in 54, and are electrically connected to the electric circuit pattern 38 on the surface of the printed circuit board 22. Therefore, the LED 23 at the corresponding gear position display position emits light in response to a signal input corresponding to the detection of the gear position of the vehicle, and the display unit 6 above the LED 23 can be illuminated. Further, the warning display section 8 shown in FIG.
It has the same structure as.

Further, in the prior SL embodiment, meter instrument device 1
Has a display surface exposed structure in which no transparent protective cover is provided on its front surface, but it is preferable to attach a transparent protective cover parallel to the display surface when mounting the vehicle on a dashboard. In addition, the transparent protective cover can be easily fixed to the upper case 17 of the instrument device 1 by a screw or an engagement hook, or the like, and the reflection of external light can be prevented by coating the surface.

In the case of this embodiment, the front side of the meter device 1 becomes thicker Therefore forward to the protective cover, protrudes to which is the object behind the meter device 1 of the present invention, i.e., the back of the meter device
The travel can be made smaller, and the vehicle can occupy less space in the dashboard. In particular, the rearward thickness of the meter device 1 in the present invention is almost entirely the meter body 18, 19,
Because it depends on the thickness of 20, 21, the instrument body 18,
If the thickness of 19, 20, 21 is reduced, the thickness can be further reduced.

In each of the embodiments described above, a cross-coil instrument main body is used as the instrument main body , and the rotating shaft for fixing the pointer is directly connected to the movable portion of the instrument main body. it may be used wherein the meter body, can also be replaced with another thin electric meter main body and without securing the direct guidance to the rotating shaft you stand from the moving part of the instrument main body, a display of the meter device in a positional relationship of the layout and interior components, it may have a structure for fixing the guidance to the tip provided with a rotary shaft which is arranged in conjunction with the upper part rotating shaft and the gear connected to consequently moving part of the instrument body. In particular, such structures are approaching the pointer position of the rotation speed reduction structures and or adjacent instrument comrades when using scan te Ppumota type meter main body shown in real HirakiAkira No. 64-25,757 conventional example described above It can be used at the time of design restrictions such as causing

Further, in each of the embodiments described above, the drive circuit of the instrument main body is not described, but the drive circuit itself is not particularly specific to the structure of the instrument device of the present invention. Since only the general circuit as disclosed is used, it can be used for various instruments.

[0032]

According to the meter device of the present invention, the meter
Occupancy width into the dashboard when the mounting of the instrument apparatus of the depth i.e. the vehicle dashboard devices becomes extremely small, therefore as the meter device has been pushed forward by enlargement of the air duct in the dashboard What is the arrangement
Without that, it is possible to look dashboard around to provide a very good thin instrument device.

Further, the rear thickness of the instrument device largely depends on the thickness of the instrument body with respect to the instrument display surface, so that the thickness of the instrument body can be further reduced by thinning the instrument body. , can be made extremely thin the thickness of the entire device, not only a total device rear side of the apparatus.

[Brief description of the drawings]

FIG. 1 is a front view of an instrument device showing one embodiment of the present invention.

FIG. 2 is a cross-sectional view of an instrument device showing one embodiment of the present invention.

FIG. 3 is a cross-sectional view of a main part of an instrument device showing one embodiment of the present invention.

FIG. 4 is a front view of the traveling speedometer according to the embodiment of the present invention, from which a display plate and a pointer are removed.

FIG. 5 is a front view of a light receiving surface of a light guide showing one embodiment of the present invention.

FIG. 6 is a front view of a light receiving surface of a light guide according to another embodiment of the present invention.

FIG. 7 is a sectional view of a main part of an instrument device according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Instrument device 2 Traveling speed meter 3 Engine tachometer 4 Fuel gauge 5 Water temperature meter 9, 10, 11, 12 Display board 13, 14, 15, 16 Indicator 17 Upper case 18, 19, 20, 21 Instrument body 22 Printed circuit board 23 LED 24, 25, 26, 27 Reflector 28, 29, 30, 31 Pointer 32, 33, 34, 35 Light guide 36 Lower case 38 Circuit pattern

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-113351 (JP, A) JP-A-5-33020 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) G01D 11/28 G01D 11/24

Claims (1)

(57) [Claims] 1. A printed circuit board on which at least an electric circuit pattern for signal transmission is formed, an electric instrument main body arranged on the front side of the printed circuit board and fixed to the printed circuit board, and an electric instrument main body arranged on a front side of the instrument main body. A display panel provided with a light-transmitting index corresponding to a measurement item indicated by the instrument body; a plurality of light emitting diodes disposed around the instrument body on the printed board surface side; and a surface of the printed board. A reflection plate disposed on the side of the display panel and fixed to the return side, located on the rear surface of the light-transmitting index of the display panel, and reflecting light of the light emitting diode to the display panel side; and the instrument main body of the display panel. A pointer formed of a translucent member fixed to the tip of a rotating shaft interlocking with a movable portion of the instrument main body protruding through a penetrating portion provided at a corresponding portion, and provided between the printed board and the display board. And a light guide for guiding light from the light emitting diode to the pointer, an upper case disposed on the front side of the printed board, and a lower case covering a rear side of the printed board.