WO2004040243A1

WO2004040243A1 - Instrument gauge device

Info

Publication number: WO2004040243A1
Application number: PCT/JP2003/013451
Authority: WO
Inventors: Masahiko Nakazawa
Original assignee: Nippon Seiki Co.,Ltd.
Priority date: 2002-10-30
Filing date: 2003-10-21
Publication date: 2004-05-13
Also published as: JP2004150915A; JP3885956B2

Abstract

An instrument gauge device where a single circuit substrate to which driving devices for driving pointers are connected can be used even if the pointers are arranged in a manner stepped in an axial direction of rotating shaft, and that is vibration resistant. The device comprises a first driving device for driving a rotating shaft according to a first measured amount, a second driving device for driving a rotating shaft according to a second measured amount, a first pointer fixed to the rotating shaft of the first driving device, a second pointer fixed to the rotating shaft of the second driving device, a scale plate with indication portions where the first and second pointers point, and a circuit substrate electrically connected with the first and second driving devices. In the instrument gauge device, the first pointer is provided more forward in the axial direction of the rotating shafts than the second pointer, the first driving device is provided on the front face side of the circuit substrate, and the second driving device is provided on the back face side of the circuit substrate.

Description

Description Instrument instrument Technical field

The present invention relates to an instrument device mounted on, for example, an automobile or a motorcycle, and more particularly to an instrument device in which a plurality of types of instruments are integrated into a unit. '' Background technology

Conventional instrumentation includes multiple instruments, each of which operates according to different measured quantities, such as a speedometer that displays vehicle speed, a tachometer that displays engine speed, a fuel gauge that displays remaining fuel, and engine coolant. There is known a so-called combination meter in which a plurality of instruments, such as a water thermometer, for displaying the temperature of the air are united.

The main components of each instrument are a driving device that drives the rotating shaft according to different measured quantities, a pointer connected to the rotating shaft of the driving device, and a scale plate located behind the pointer. The measurement amount can be read by comparing the index part provided on the scale plate according to each measurement amount with the pointer rotating on the scale plate according to the measurement amount. When such a plurality of instruments are unitized, each instrument consisting of a drive unit, a pointer, and a scale plate is subunited for each type, and the structure of integrating these subunits through a housing etc. has been used for a long time. (See, for example, FIGS. 1 and 2 in Japanese Patent Application Laid-Open No. 11-287673). However, this structure requires a subunit process for each instrument, which makes assembly and productivity difficult.Therefore, recently, multiple drive units are mounted on a single circuit board. In addition, a structure in which a pointer and a scale plate are attached to the vehicle has been adopted.

Moreover, in this type of instrument device, there is a device in which the position of the scale plate surface with respect to the observer has a front-back difference (step) with respect to the rotation axis direction depending on the type of the instrument. In this case, in order to make the pointer position correspond to the plate surface position of the scale plate, the insertion amount of the rotary shaft into each of the hands (the boss part) was changed according to the front-back difference (step) of the scale plate. (For example, See FIG. 2 of Japanese Patent Application Laid-Open No. 2000-133432).

Among the instruments that constitute such an instrument, those with a long rotating shaft (including the boss of the pointer) connecting the finger and the driving device are more vulnerable to vibration than those with a short rotating shaft. Therefore, there is a problem that it is difficult to use it for instrument devices such as motorcycles used in environments with severe vibration, and as a result, a circuit board is provided for each However, in this case, there is a problem that the cost is increased because the circuit board is divided for each instrument.

The present invention has been made in view of these points, and a main object of the present invention is to connect a plurality of driving devices for driving the plurality of hands, respectively, even when the plurality of hands have a structure having a front-back difference from each other. The present invention provides an instrument device that can use a single circuit board described above and is resistant to vibration. Disclosure of the invention

In order to achieve the above object, the present invention provides a first drive device that drives a rotation axis according to a first measurement amount, and a second drive device that drives a rotation axis according to a second measurement amount. A first pointer fixed to a rotating shaft of the first driving device, a second pointer fixed to a rotating shaft of the second driving device, and the first and second pointers indicate A scale plate having a display unit; and a circuit board electrically connected to the first and second driving devices, wherein the first pointer is the second pointer in the axial direction of the rotation shaft. In the instrument device arranged further forward, the first drive device is arranged on the front side of the circuit board, and the second drive device is arranged on the back side of the circuit board.

A first driving device that drives a rotating shaft to which the first pointer is fixed; a second driving device that drives a rotating shaft to which the second pointer is fixed; and the first and second driving devices. A scale plate provided with a display unit indicated by the hands, and a circuit board electrically connected to the first and second driving devices, wherein the first hands in the axial direction of the rotating shaft are provided by the first hands. In the instrument device disposed forward of the second pointer, the first driving device is disposed on the front side of the circuit grave plate, and the second driving device is disposed on the rear side of the circuit board. Things. Further, in the present invention, the circuit board is a hard circuit board.

In the present invention, the light source for illuminating the scale plate is a surface-mounted chip-type light-emitting diode.

Further, the present invention includes a light guide for guiding light of a light source for illuminating the first pointer to the first pointer. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a front view showing a front side of an instrument device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIG. FIG. 4 is a cross-sectional view of a main part of a first driving device of the embodiment, and FIG. 4 is a cross-sectional view of a main part of a second driving device of the embodiment. BEST MODE FOR CARRYING OUT THE INVENTION

The instrument device according to the present invention comprises a first driving device 6, 7 for driving the rotating shafts 61, 71 in accordance with a first measured amount, and a rotating shaft 81, 91 in accordance with the second measured amount. Drive devices 8 and 9 for driving the first drive devices, first hands 21 1 and 31 fixed to the rotating shafts 61 and 71 of the first drive devices 6 and 7, and the second drive device 8 , 9, the second pointers 41, 51 fixed to the rotating shafts 81, 91, and the first and second pointers 21, 31, 41, 51 indicate the display M Plates 22, 32, 42, 52 provided with a circuit board 10 electrically connected to the first and second driving devices 6, 7, 8, 9. 6 1, 7 1, 8 1, 9 1 In the axial direction, the first pointer 21 1, 31 1 is the first drive in the instrument 1 arranged ahead of the second pointer 41 1, 51. The devices 6 and 7 are arranged on the front side of the circuit board 10 and the second driving devices 8 and 9 are mounted on the back of the circuit board 10. It is arranged on the surface side. With such a configuration, even if the plurality of hands 21, 31, 41, 51 have a front-back difference from each other, the plurality of hands 21, 31, 41, 51 are respectively provided. It is possible to use a single circuit board 10 connecting a plurality of driving devices 6, 7, 8, 9 to be driven, and to provide an instrument device 1 that is resistant to vibration.

In addition, the first pointer 2 1, 3 1 drives the rotating shafts 6 1, 7 1 to which the first pointer is fixed. Driving devices 6 and 7, second driving devices 8 and 9 for driving rotating shafts 8 1 and 9 1 to which the second hands 41 and 51 are fixed, and first and second hands 21 and 31, 41, 51, a scale plate 22 with a display section M indicated by the indicator 21, 22, 32, 42, 52, and the first and second drive units 6, 7, 8, 9 And the first hands 21 and 31 in the axial direction of the rotating shafts 61, 71, 81 and 91 are higher than the second hands 41 and 51. In the instrument device 1 arranged in front, the first driving devices 6 and 7 are arranged on the front side of the circuit board 10 and the second driving devices 8 and 9 are arranged on the back side of the circuit board 10. Things. With this configuration, even if the plurality of hands 21, 31, 41, 51 have a difference in front and rear, the plurality of hands 21, 31, 41, 51 are respectively assigned. It is possible to use a single circuit board 10 in which a plurality of driving devices 6, 7, 8, 9 to be connected are connected, and it is possible to provide an instrument device 1 that is resistant to vibration.

Further, in the present invention, the circuit board 10 is a hard circuit board. With this configuration, it is possible to provide an instrument device 1 that can support the driving devices 6, 7, 8, 9 'by the circuit board 10.

Further, in the present invention, the light source 12 for illuminating the scale plates 22, 32, 42, 52 is a surface-mounted chip type light emitting diode. With this configuration, it is possible to satisfactorily illuminate the scale plates 42, 52 even if the distance between the scale plates 22, 32, 42, 52 and the circuit board 10 is small. Instrument system 1 can be provided. Further, the present invention is provided with a light guide 13 for guiding the light of the light source 12 for illuminating the first hands 21 and 31 to the first hands 21 and 31. With this configuration, even if the distance between the first hands 21 and 31 and the circuit board 10 is wide, an instrument that can illuminate the first hands 21 and 31 well can be provided. Apparatus 1 can be provided.

An embodiment of the present invention will be described below with reference to the accompanying drawings. In one embodiment, the present invention is applied to an in-vehicle instrument device.

In FIG. 1, an instrument device 1 according to the present embodiment includes a speedometer 2, a tachometer 3, a fuel meter 4, and a water temperature meter 5.

As shown in detail in FIGS. 2 to 4, these various instruments 2 to 5 include cross-coil type driving devices 6 to 9 and rotating shafts 61, 71, 81, and 81 of these driving devices 6 to 9. 9 in 1 The pointers 2 1, 3 1, 4 1, 5 1 inserted into and fixed to the distal end, and the scale plates 2 2, 3 2, 4 located behind these pointers 2 1, 3 1, 4 1, 5 1 2 and 5 and a circuit board 10 electrically connected to the driving devices 6 to 9.

The driving devices 6 to 9 use the same driving device that is structurally equivalent to the speedometer 2 and the tachometer 3 in the various instruments 2 to 5, and the fuel meter 4 and the water temperature meter 5 also use the same structural device. A new common drive is used.

The drive used for speedometer 2 (first drive) 6 is for vehicle speed, the drive used for tachometer 3 (first drive) 7 is for engine speed, and fuel gauge 4 Drive unit (second drive unit) 8 used for remaining fuel in the fuel tank, drive unit used for water temperature gauge 5 (second drive unit) 9 rotates according to engine coolant temperature It is configured to drive axes 61, 71, 81, and 91. A pointer (first pointer) 2 1 is provided on the rotation axis 6 1 of the drive 6, a pointer (first pointer) 3 1 is provided on the rotation axis 7 1 of the drive 7, and a rotation axis 8 1 of the drive 8 is provided. A pointer (second pointer) 41 is inserted and fixed to the rotating shaft 91 of the driving device 9, respectively. The pointers 21, 31, 41, 51 are made of a light-transmitting synthetic resin, and the indicating portions 21, 31, 31 extend along the surface of the scale plates 22, 32, 42, 52. , 4 1 1, 5 1 1 and a pointer cap 2 1 2, 3 1 2., made of a substantially cup-shaped light-shielding synthetic resin that covers the center of rotation of the fingers 2 1, 3 1, 4 1, 5 1. 4 1 2, 5 1 2 and light-shielding synthetic resin that connects the indicator 2 1 1, 3 1 1, 4 1 1, 5 1 1 1 to the rotating shaft 6 1 Insertion part (boss part) It is composed of 2 13, 3 13, 4 13, and 5 13. Inlet (boss) 2 13, 3 13, 4 13, 5 13 are provided with holes (not shown) for inserting the rotating shafts 61, 71, 81, 91. ing.

The scale plates 22, 32, 42, 52 are provided on the surface of a base material made of a transparent material, a ground color part B (see Fig. 1) made of a light-shielding printing layer, and colored translucent printing. It is composed of layers, and a display M (see Fig. 1) of scales, characters, marks, etc., to be indicated by the pointers 21, 31, 31, 41, 51 is formed. It is provided at the site except for.

Of these scale plates 2, 2, 32, 42 and 52, the scale plates 2 and 32 constituting the speedometer 2 and the tachometer 3 cover the front of the first drive units 6 and 7 and the fuel gauge. 4 and water thermometer 5 The graduation plates 4 2, 5 2 that cover the front of the second drive units 8, 9, and the graduations of the speedometer 2 and the tachometer 3 in the axial direction of the rotation axes 61, 71, 81, 91 The plate surfaces of the plates 22 and 32 are placed in front (upper in Fig. 2) closer to the observer, and the scale plates 4 2 and 52 of the fuel gauge 4 and the water temperature gauge 5 are They are arranged with a front-rear difference so that they can be seen deep in the rear (lower part in Fig. 2) side of the viewer. Therefore, the pointers 21, 31, 31, 41, 51 located in front of the scale plates 22, 32, 42, 52 are also the first pointers 21, 31, 31 and the second pointer 4, 21. In the axial directions of the rotating shafts 61, 71, 81, and 91, the first hands 21 and 31 are forward (upper in FIG. 2) and the second The pointers 41 and 51 are arranged with a difference in front and rear so that they can be seen behind the back (lower in FIG. 2).

Also, each of the scale plates 22, 32, 42, 52 surrounds the periphery of the circuit board 10 and partially contacts the circuit board 10, forming a skeleton of the instrument device 1. It is supported on the circuit board 10 by 1.

The circuit board 10 is a hard circuit board made of glass epoxy resin or the like. A light emitting diode as a light source and a chip-type light emitting diode 12 which can be mounted on a surface are provided at predetermined positions on the circuit board 10. The scales 4 2, 5 2 and the pointers 4 1, 5 1 of the fuel gauge 4 and the water temperature gauge 5 are directly illuminated with the light from the light emitting diode 12, and are rotated with the speedometer 2. A total of 3 scale plates 2 2, 3 2 and pointers 2 1, 3 1 are arranged behind the scale plates 2 2, 3 2 with light guides 13 corresponding to the driving devices 6, 7, respectively. The light from the light emitting diode 12 is guided by 13 to illuminate the scale plates 22 and 32 and the fingers and the needles 21 and 31.

In this way, the front sides of the various instruments 2 to 5 integrated through the circuit board 10 and the middle case 11 are covered with a facing frame 14 that conceals unnecessary areas and exposes necessary areas. The front side of the circuit board is covered with a transparent cover 15, and the back of the circuit board 10 is covered with a back cover 16.

Each of the driving devices 6 to 9 is directly mounted on a single circuit board 10. It is directly electrically connected to a circuit pattern (not shown) formed on at least both sides of the circuit board 10.

As described above, the first and second driving devices 6 to 9 have the same structure as the first driving devices 6 and 7. And the second driving devices 8 and 9 are structurally equivalent. The first driving device 7 and the second driving device 9 are taken as examples, and the first driving device 8 and the second driving device 9 are used as examples. The structure of the devices 7 and 9 and the structure for fixing the circuit board 10 will be described.

The first drive unit 7 includes a disk-shaped magnet 72 fixed to a rotating shaft 71, a synthetic resin frame 73 accommodating a part of the magnet 752 and a part of the rotating shaft 71, and a frame 71. 3 and a cylindrical cup-shaped case 75 made of metal for accommodating the frame 73 and the coil 74.

Although not shown, the frame 73 is divided into upper and lower two parts. The frame 73 has a storage space 76 for storing a part of the magnet 72 and the rotary shaft 71. The frame 73 holds the magnet 72 and the rotating shaft 71 rotatably.

The coil 74 is wound around the frame 73 so that the coils through which two different electrical signals flow cross each other. The frame 73 is provided with four legs 77, and a metal cylindrical terminal 78 is embedded in all of the four legs 77. Although not shown, a coil 74 is connected to this terminal 78. Out of the four 15 legs 77, two of them have an arm piece 79 protruding upward, and are fixed to the scale plate 3 2 and the light guide 13 by screws 17. I have. Also, the lower ends of all four legs 77 are exposed through the case 75. And it is fixed to the circuit board 10 by the screw 18. The first driving device 7 is arranged on the front side (upper side in FIG. 3) of the circuit board 10. In addition, when the screw 18 contacts the terminal 78, the terminal 78 is electrically connected to a circuit pattern (not shown) formed on the circuit board 10.

The second drive unit 9 is, like the first drive unit 7, a disc-shaped magnet 92 fixed to the rotating shaft 91, and a synthetic resin housing the magnet 92 and a part of the rotating shaft 91. It comprises a frame 93 made of stainless steel, a coil 94 wound around the frame 93, and a cylindrical cup-shaped case 95 made of metal for housing the frame 93 and the coil 2594. .

The frame 93 is not shown, but is divided into upper and lower two parts. The frame 93 has a storage space 96 for storing a part of the magnet 92 and the rotating shaft 91. The frame 93 holds the magnet 92 and the rotating shaft 91 rotatably. Coil 94 is wound around frame 93 such that two different electrical signals flow through each other. Further, the frame 93 is provided with four legs 97, and a metal rod-shaped terminal 98 is embedded in all of the four legs 97. Although not shown, a coil 94 is connected to this terminal 98. Out of the four leg portions 97, two of them have an arm piece 990 projecting upward, and are fixed to the circuit board 10 by screws 19. The second drive device 9 is arranged on the back side (the lower side in FIG. 4) of the circuit board 10. The terminal 98 is electrically connected to a circuit pattern (not shown) formed on the circuit board 10 by soldering.

As described above, the first hands 21 and 31 and the second hands 41 and 51 are arranged at different positions in the front-back direction (the vertical direction in FIG. 2) with respect to the observer. The first driving devices 6 and 7 for driving the first hands 2 1 and 3 1 are arranged on the front side of the circuit board 10 and the second hands 4 1 and 5 1 ′ are driven. By arranging the second drive units 8 and 9 on the back side of the circuit board 10, the rotation connecting the hands 21, 31, 41 and 51 and the drive units 6, 7, 8 and 9 can be achieved. The shafts 61, 71, 81, 91 have substantially the same length, and in particular, the rotating shafts 61, 1, which connect the first hands 21, 31 to the first driving devices 6, 7. Without increasing the length of 71, the first pointers 21 and 31 and the second pointers 41 and 51 move the observer in the front-rear direction (see FIG. 2). , Up and down). In addition, the rotating shafts 61 and 71 connecting the first pointers 21 and 31 and the first driving devices 6 and 7 can be shortened as compared with the conventional case, and are resistant to vibration. An instrument device can be provided. Therefore, the present invention can be applied to an instrument device such as a motorcycle used in an environment with severe vibration. It should be noted that the instrument device of the present invention may be applied to automobiles other than motorcycles.

In addition, since the circuit board 10 is a hard circuit board, it is possible to provide an instrument device 1 that can support the driving devices 6, 7, 8, 9 by the circuit board 10. In this embodiment, the circuit board 10 is a hard circuit board 10. However, the circuit board 10 is not limited to the previous embodiment, and may be a soft and flexible circuit board. In this case, it is sufficient to fix to the middle case 11 and to make only the electrical connection of the driving devices 6, 7, 8, 9.

Also, the present invention provides a light source 12 for illuminating the scale plates 42, 52, which is a surface-mounted chip type. It is a light emitting diode. With such a configuration, the distance between the scale plates 22, 32, 42, 52 and the circuit board 10 can be reduced by reducing the size of the light source. By reducing the distance between the pointers 41, 51 and the drive units 8, 9, the front-rear difference between the first pointers 21, 31 and the second pointers 41, 51 is increased. It is possible to provide an instrument device 1 having a sense of depth. Also, the scale plates 42 and 52 can be satisfactorily illuminated even at such a narrow interval.

In addition, the present invention is provided with a light guide 13 for guiding the light of the light source 12 illuminating the first hands 21 and 31 to the first hands 21 and 31. With this configuration, the first pointers 2 1, 3 1 of the first driving devices 6, 7 arranged on the front side of the circuit board 10

It is possible to provide an instrument device 1 that can satisfactorily illuminate the first hands 21 and 31 even when the distance between the circuit board 10 and the circuit board 10 is wide.

Also, in this embodiment, the driving devices 6 to 9 are provided with magnets 72, 92 on the rotating shafts 61, 71, 81, 91 to which the hands 21, 31, 41, 51 are fixed. Although it was fixed, it is not limited to the embodiment described above, and the rotating shaft to which the hands 21, 31, 41, 51 are fixed

15 6 1, 7 1, 8 1, 9 1 need not have magnets 7 2, 9 2 fixed to them, and magnets 7 2, 9 2 are different from rotating shafts 6 1, 7 1, 8 1, 9 1. The drive units 6 to 9 may be fixed to different shafts and connected to this shaft and the rotating shafts 61, 71, 81, 91 by transmission means such as gears.

The driving devices 6 to 9 are not limited to the cross-coil type driving devices 6 to 9, but may be a stepping motor type driving device. Industrial applicability

INDUSTRIAL APPLICABILITY The present invention can be applied to an instrument device, and is particularly suitable for an instrument device having a structure in which a plurality of hands have a front-rear difference.

Claims

The scope of the claims

1. A first driving device that drives a rotating shaft according to a first measured amount, a second driving device that drives a rotating shaft according to a second measured amount, and rotation of the first driving device A first pointer fixed to a shaft, a second pointer fixed to a rotating shaft of the second driving device, and a scale plate provided with a display unit indicated by the first and second hands. A circuit board electrically connected to the first and second driving devices, wherein the first pointer is disposed forward of the second pointer in the axial direction of the rotating shaft. An instrument device, wherein the first drive device is arranged on the front side of the circuit board, and the second drive device is arranged on the back side of the circuit board.

2. A first driving device for driving the rotating shaft to which the first pointer is fixed, a second driving device for driving the rotating shaft to which the second pointer is fixed, and the first and second hands And a circuit board electrically connected to the first and second driving devices, and the first pointer in the axial direction of the rotating shaft is the second pointer. In a meter device arranged forward of the first finger, the first drive device is arranged on the front side of the circuit board, and the second drive device is arranged on the back side of the circuit board. Instrumentation device characterized by the following.

3. The instrument device according to claim 1, wherein the circuit board is a hard circuit board.

4. The instrument device according to claim 3, wherein a light source for illuminating the scale plate is a surface-mounted chip-type light-emitting diode.

5. The instrument device according to claim 3, further comprising a light guide that guides light of a light source that illuminates the first pointer to the first pointer.