JP3350928B2 - 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 moving body such as an automobile, a motorcycle, an agricultural and construction machine, a water bike, a snow bike, a ship, and the like, and more particularly to a positioning structure of its components. It is.

[0002]

2. Description of the Related Art For example, as an instrument device comprising a speedometer mounted on a scooter-type motorcycle, a speedometer main body (instrument main body) having a drive shaft protruding from a driving circuit board (sub-circuit board) is mounted. On the front side of the main body, arrange a front panel with scales and character display sections according to speed,
A speedometer unit is attached to the tip of the drive shaft via a penetrating portion of the front panel, and a speedometer unit capable of instructing rotation of the display unit by the hands is provided. Mounted on the board, mounted on the main circuit board a light source for illumination consisting of an incandescent bulb with a filament, housed the entire unit integrated in this way in a case, and attached a transparent cover on the front side of the case (See, for example, Japanese Patent Application Laid-Open No. 8-193853).

[0003] In recent years, in accordance with the trend toward thinner and lighter weight of such an instrument device, the progress of component mounting technology on a circuit board, and the like, for example, an electric instrument main body and a drive IC for driving the instrument instrument have been developed. Various electronic components, if necessary, light sources such as light emitting diodes that are small and generate a small amount of heat are mounted on a single rigid circuit board, and a case body is provided on the circuit board on which various components are mounted, A configuration in which a front panel is disposed on the case body and a pointer is provided on the drive shaft of the instrument main body from the front of the front panel has been adopted.

[0004]

However, in such a configuration in which the front panel is supported through a case body on a single circuit board on which various components are mounted, as described in the above-mentioned Japanese Patent Application Laid-Open No. 8-193853. Since the instrument body and the front panel are not directly fixed, the instrument body and the front panel are likely to be misaligned, and a positioning hole is provided on the outer periphery of the front panel and positioned on the case body corresponding to the positioning hole. There is a problem that a simple positioning structure in which a pin is provided cannot sufficiently cope with the problem.

The present invention has been made in view of the above points, and a main object of the present invention is to provide an instrument device capable of suppressing displacement of a front panel with respect to an instrument body by devising a positioning structure. It is something you want to do.

[0006]

In order to achieve the above object, the present invention provides a circuit board, an instrument body mounted on the circuit board and having a drive shaft extending forward, and a linear body mounted on a tip end of the drive shaft. A front panel having a pointer that extends to the front panel, a front panel that is disposed between the pointer and the circuit board, and that has at least a display unit corresponding to the pointer and a penetrating unit corresponding to the drive shaft; and A case body disposed between the circuit board and supporting the front panel from behind, at least one pair of engaging portions is formed on the front panel on an extension extending outward from the center of the through portion, In the case body, a positioning reference portion that fits into the through portion and determines a reference position of the front panel and engages with each of the engagement portions to restrict rotation of the front panel about the positioning reference portion as an axis. position Characterized in that the fit portion are formed.

Further, the present invention is characterized in that the front panel is formed to be long in a predetermined direction, and the engaging portion is formed on the outer peripheral portion in the longitudinal direction so as to sandwich the through portion.

Further, the present invention is characterized in that the engaging portion comprises a long hole extending toward the center of the through portion.

Further, the present invention is characterized in that the positioning reference portion is provided with a rotation restricting portion which comes into contact with a part of the pointer and restricts a rotation range thereof.

[0010] The present invention is characterized in that the rotation restricting portion protrudes toward the rotation shaft.

Further, the present invention is characterized in that the case body is provided with a hook portion which engages with an outer peripheral portion of the front panel.

Further, according to the present invention, the pointer is made of a translucent material which receives light from a center of rotation and emits light, and a light source for supplying light to the pointer is provided on the circuit board; A light guide surface that guides light from the light source to a center of rotation of the indicator in a cylindrical shape surrounding the drive shaft.

Further, according to the present invention, the display section has a light transmitting property of transmitting light from the light source, and the case body reflects the light from the light source around the positioning reference section toward the front panel. It is characterized by having a reflecting portion that performs the following.

Further, the invention is characterized in that the case body is made of a white synthetic resin material.

Further, the present invention is characterized in that the light source comprises a single light source for illuminating the indicator and the display unit.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment will be described with reference to the attached drawings, taking as an example the case where the instrument device according to the present invention is applied to a speedometer of a scooter type motorcycle.

FIG. 1 is an exploded perspective view of a speedometer according to an embodiment of the present invention, FIG. 2 is a front view showing an assembled state of the speedometer of FIG. 1, and FIG. 3 is a line AA of the speedometer shown in FIG. 4 is a cross-sectional view of the speedometer shown in FIG. 2 along line BB, FIG. 5 is a cross-sectional view of the speedometer shown in FIG. 2 along line CC, FIG. 3 is a partially enlarged sectional view of an arrow D region in FIG. 3, FIG. 7 is a partially enlarged sectional view of an arrow E region in FIG.
FIG. 8 is a partially enlarged sectional view of an arrow F region in FIG.
FIG. 3 is a partially enlarged front view showing the arrow G and H regions in FIG. 2 omitting an intermediate portion.

In FIG. 1, a speedometer comprises a circuit board 1 and
Speedometer main body (instrument main body) 2, pointer 3, front panel 4
And the case body 5 are main components.

The circuit board 1 is formed of a rigid printed circuit board made of, for example, a glass epoxy material, and has a plurality of light sources L on its front side for illuminating a liquid crystal panel and a notification display section described later. .

The light source L is composed of an SMD (Surface Mount Device) type light emitting diode, and is mounted on the circuit board 1 such that the light emitting portions thereof face forward.

The circuit board 1 also has holes 11 to 11 at positions corresponding to a bearing portion, an insertion pin, and a terminal of the speedometer body 2 which will be described later.
13, a round hole-shaped fitting portion 14 is formed at a position corresponding to a first positioning reference portion described later of the case body 5, and a pair of first positioning portions described later of the case body 5 Elongated first engaging portions 15 and 16 each extending toward the center of the fitting portion 14 are formed at corresponding positions, and correspond to caulking portions provided on a holding member of a liquid crystal display described later. The insertion hole 17 is provided at the position where the hole is formed. The first
The engaging portions 15 and 16 are provided on both sides in the longitudinal direction of the circuit board 1 so as to sandwich the fitting portion 14.

The speedometer main body 2 is composed of, for example, a cross-coil type instrument main body or a stepping motor type instrument main body which rotates the drive shaft 21 in response to a current flowing through a coil (not shown). The bearing portion 2 includes an extending bearing portion 22, an insertion pin 23, and a terminal 24.
The position of the speedometer main body 2 with respect to the circuit board 1 is determined by inserting the insertion pins 2 and the insertion pins 23 into the holes 11 and 12 of the circuit board 1, and the terminals 24 are inserted into the holes 13 of the circuit board 1 and soldered. By doing so, the speedometer main body 2 is electrically connected to the circuit board 1. As described above, the speedometer main body 2 is mounted on the circuit board 1.
And the drive shaft 21 is mounted behind the circuit board 1 so as to penetrate forward.

The pointer 3 comprises a pointer 31 made of a translucent resin material and a pointer cover 3 covering a predetermined area of the pointer 31.
Consists of two. The indicator 31 is a drive shaft 21 of the speedometer main body 2.
The guide cover 32 extends linearly in a direction substantially perpendicular to the axial direction of the drive shaft 21 as shown in FIG.
A light receiving portion 34 for receiving light from the light source L and a pointer reflecting portion 35 for reflecting the light received from the light receiving portion 34 toward the distal end of the pointer 31 are formed in the rotation center portion 33 covered with.
The indicator 31 receives the light supply from the light source L from the rotation center portion 33 and shines linearly. A portion of the rotation center portion 33 extending along the drive shaft 21 is in contact with a rotation restricting portion, which will be described later, provided on the case body 5 and is provided with the indicator 31.
The movable contact portion 36 that defines the rotation range of the drive shaft 21 is formed so as to protrude in a direction orthogonal to the axial direction of the drive shaft 21.

The front panel 4 has a thin translucent resin plate and an arc-shaped arrangement centered on a penetrating portion to be described later.
A measured amount display unit (display unit) 41 composed of numbers, a character display unit 42 indicating that the type of the measured amount display unit 41 is the traveling speed, and a notification display unit 43 indicating a speed alarm or an oil alarm.
And a ground portion 44 serving as a background of each of the display portions 41 to 43 are printed and formed. Each of the display portions 41 to 43 has a light transmitting property, and the ground portion 44 is provided to have a light shielding property. ing.

The front panel 4 is provided with a case body 5 at a position corresponding to the drive shaft 21 of the speedometer main body 2 in a central area thereof.
A circular penetrating portion 45 that fits with a second positioning reference portion described later is formed, and a portion corresponding to a colored panel and a liquid crystal display (both described later) constituting a turn indicator portion has an arrow shape or Rectangular opening windows 46, 47
Are formed, and a pair of second
Are formed.

The second engaging portions 48 and 49 are located on an extended line extending outside from the center of the through portion 45 (see a dashed line AA in FIG. 2), and penetrate along the extended line. Part 4
The case 5 is provided in a long hole shape extending toward the center of the case 5 and engages with a positioning portion of the case body 5 described later. The second engaging portions 48 and 49 are connected to the circuit board 1 so as to sandwich the through portion 45.
Are provided on both sides in the longitudinal direction.

The case body 5 is made of a molded body of a white resin having an outer shape corresponding to the front panel 4 and is disposed between the circuit board 1 and the front panel 4. As shown in FIG. 5, on the side facing the circuit board 1 side, it has a round pin shape corresponding to the inner diameter of the fitting portion 14 of the circuit board 1 and fits into the fitting portion 14. The first positioning reference portion 51 has a round pin shape having an outer diameter corresponding to the distance between the long sides of the first engaging portions 15 and 16 of the circuit board 1. , 16 are formed with first positioning portions 52, 53 which are engaged with each other.
When the first positioning reference portion 51 is fitted to the circuit board 1, the reference position of the case body 5 with respect to the circuit board 1 is determined, and the first positioning portions 52 and 53 are engaged with the first engagement portions 15 and 16. Thus, the rotation of the case body 5 about the first positioning reference portion 51 is restricted, and the circuit board 1 is thereby controlled.
The positioning of the case body 5 is performed. The first
Are formed as long holes.
This is for positioning the circuit board 1 and the case body 5 while absorbing a dimensional error. The case body 5 thus positioned on the circuit board 1 is permanently fixed by fixing means such as screws (not shown). Also, the first engaging portions 15, 16
And the number of positioning portions 52 and 53 corresponding to this is arbitrary, but if provided in pairs as in this embodiment, accurate positioning can be performed. Further, the positioning of the case body 5 and the circuit board 1 is not limited to the structure of the present embodiment, but may be any configuration as long as the circuit board 1 and the case body 5 are positioned by partially fitting or engaging the two. However, by adopting the positioning structure of the circuit board 1 and the case body 5 as in the present embodiment, the positioning accuracy can be improved.

On the side of the case body 5 facing the front panel 4, the liquid crystal display 6 displaying the traveling distance and being illuminated by the light source L and the opening window 47 forming the turn indicator section are colored by the light emission of the light source L. A plurality of holding portions 54 for holding the colored panel 7 to be formed and constituting a lighting housing; a housing portion 55 corresponding to the notification display portion 43 and constituting a lighting housing for illuminating the notification display portion 43; The light from L is reflected to the measurement amount display unit 41 side, and as shown in FIGS. 3 and 4, a reflection unit 56 forming an illumination room between the front panel 4 and a second unit corresponding to the penetration unit 45. Positioning reference portion (positioning reference portion) 57;
The second positioning portions (positioning portions) 58, 59 in the form of rectangular projections corresponding to the engaging portions 48, 49 are formed.

The second positioning reference portion 57 includes a through portion 45
Is formed into a cylindrical shape having an outer diameter corresponding to the inner diameter of the drive shaft 21 and penetrating along the axial direction of the drive shaft 21, and is fitted into the through portion 45 so that the front panel 4 with respect to the case body 5 is formed. And the light from the light source L is applied to the center of rotation 3 of the indicator 31 using the inner wall of the reference position.
3 is provided with a light guide surface 570. On the inner wall portion of the second positioning reference portion 57, a protruding piece-shaped rotation restricting portion 57a that contacts the movable contact portion 36 of the pointer 3 (see FIG. 6) and restricts the rotation range of the indicator 31 is provided. It is formed so as to protrude toward the rotating shaft 21 side. Although not employed in the present embodiment, a protrusion is formed on at least one of the outer wall portion and the through portion 45 of the second positioning reference portion 57, and the second positioning reference portion 57 is formed through the protrusion. Can be configured so as to securely fit into the through portion 45.

When the circuit board 1 and the case body 5 are assembled, a light source L for illuminating the hands 3 and the front panel 4 is provided.
As shown in FIG. 4, one of the hands 3, the measurement amount display unit 41, the character display unit 42, is disposed at a position slightly below the opening of the positioning reference unit 57 within the central opening of the reflection unit 56. Are illuminated, and light from the light source L is applied to the character display unit 4 at five places of the case body corresponding to the character display unit 42.
A through window portion 57b passing through the second side is formed.

A pair of second positioning portions 58 and 59 are provided on both longitudinal sides of the case body 5 so as to sandwich the second positioning reference portion 57.
7 in the state where the reference position of the front panel 4 with respect to the case body 5 is determined by fitting the second positioning portion 58 and the second positioning portion 58 and 59 into the second engagement portion, as shown in FIGS. Part 4
8 and 49, the rotation movement of the front panel 4 around the second positioning reference portion 57 is regulated. The position of the front panel 4 is determined. The reason why the second engaging portions 48 and 49 are formed as long holes is as follows.
This is for positioning the front panel 4 to the case body 5 while absorbing dimensional errors, as in the case of the first engagement portions 15 and 16. The number of the second engaging portions 48 and 49 and the number of the corresponding positioning portions 58 and 59 are arbitrary. However, if a pair is provided as in the present embodiment, accurate positioning can be performed.

A plurality of hooks 5a are formed at predetermined intervals on the outer peripheral portion of the front side of the case body 5 corresponding to the outer peripheral portion of the front panel 4.
The front panel 4 is fixed to the case body 5 by engaging the outer peripheral portion of the front panel 4 positioned on the front side with the hook portions 5a.

The liquid crystal display 6 comprises a liquid crystal panel 61,
Rubber connector 6 for connecting liquid crystal panel and circuit board 1
2 and a liquid crystal panel 61 via the rubber connector 62.
Is pressed against the circuit board 1 while the liquid crystal panel 61 is mounted and fixed to the holding portion 54 of the case body 5. The cell restraint 63 has a caulking portion 64, and the caulking portion 64 is attached to the circuit board 1. The liquid crystal panel 61 is conductively fixed by penetrating through the one insertion hole 17 and caulking.

As described above, in this embodiment, the circuit board 1
A speedometer main body (instrument main body) 2 mounted on the circuit board 1 and having the drive shaft 21 extending forward, a pointer 3 mounted on the distal end side of the drive shaft 21 and having a linearly extending indicator 31, and the pointer A display unit (display unit) 41 and a drive shaft 21 which are arranged between the circuit board 3 and the circuit board 1 and correspond at least to the pointer.
And a case body 5 disposed between the front panel 4 and the circuit board 1 to support the front panel 1 from behind. A pair of second engaging portions 48 and 49 are formed on an extension line extending outward from the center of 45, and the second second portion that fits into the through portion 45 in the case body 5 and determines the reference position of the front panel 4. And second positioning portions 58 and 59 which engage with the positioning reference portions 57 and the respective engaging portions 48 and 49 and regulate the rotational movement of the front panel 4 about the second positioning reference portions 57 as axes. As a result, the front panel 4 is positioned with reference to the penetrating portion 45 corresponding to the drive shaft 21, so that the displacement between the drive shaft 21 and the measurement amount display unit (display unit) 41 can be suppressed, thereby increasing the speed. No position of front panel 4 with respect to meter body 2 It is possible to suppress.

In the present embodiment, the front panel 4 is formed to be long in a predetermined direction, and the through-hole 45 is formed on the outer peripheral portion in the longitudinal direction.
By forming the engaging portions 48 and 49 so as to sandwich
Compared with the case where the engaging portions 48 and 49 are formed in a direction orthogonal to the longitudinal direction, the engaging portions 48 and 4
The positioning accuracy can be further improved because the distance of 9 can be increased.

In this embodiment, since the engaging portions 48 and 49 are formed as long holes extending toward the center of the through portion 45, the longitudinal axes of the engaging portions 48 and 49 correspond to the center of the through portion 45. Therefore, the positioning accuracy can be further improved.

In this embodiment, the front panel 4 is positioned with reference to the penetrating portion 45. The movable positioning portion 36 of the pointer 3 is brought into contact with the second positioning reference portion 57 to restrict the rotation range thereof. By providing the rotation restricting portion 57a, it is possible to suppress a variation in the stop position of the pointer 3 due to the rotation restricting portion 57a on the front panel 4.
In addition, since the rotation restricting portion 57a is provided not on the through portion 45 of the front panel 4 but on the second positioning reference portion 57, the enlargement of the through portion 45 and light leakage due to the provision of the rotation restricting portion 57a are suppressed. be able to.

In this embodiment, the rotation restricting portion 57a is formed so as to protrude from the inner wall of the second positioning reference portion 57 toward the rotation shaft 21.
2) An increase in size can be suppressed.

In this embodiment, the case body 5 is provided with the engaging portion 5a which engages with the outer peripheral portion of the front panel 4, so that the front panel 4 can be fixed by screws, double-sided tape,
Fixing by welding or the like becomes unnecessary, so that assembling workability is improved, and cost reduction can be achieved.

In this embodiment, the indicator 31 is made of a translucent material that emits light when supplied with light from the rotation center portion 33, and the circuit board 1 is provided with a light source L for supplying light to the indicator 31. A structure for illuminating the pointer 3 and a second positioning reference portion 5
7 is formed in a cylindrical shape, and a light guide surface 5 that guides light from the light source L to the rotation center portion 33 of the indicator 31 using the inner wall portion thereof.
By providing 70, the illumination efficiency of the pointer 3 can be improved.

Further, in this embodiment, the measurement amount display section (display section) 41 has a light transmitting property for transmitting light from the light source L, and the case body 5 is provided around the second positioning reference section 57 with the light source L. The reflection efficiency of the front panel 4 can be improved by having the reflection unit 56 that reflects light from the front panel 4 toward the front panel 4 (measured amount display unit 41).

In this embodiment, the case body 5 is formed of a white synthetic resin material, so that the illumination efficiency can be further increased.

In this embodiment, the cost can be reduced by illuminating the indicator 31 and the measurement amount display section 41 with the single light source L.

[0044]

As described above in detail, the present invention relates to a circuit board, an instrument body mounted on the circuit board and having a drive shaft extending forward, and an instruction mounted on a tip end side of the drive shaft and extending linearly. A front panel having a pointer having a body, a display unit disposed between the pointer and the circuit board, and a display unit corresponding to at least the indicator and a penetrating unit corresponding to the drive shaft; and a front panel and the circuit board. And a case body disposed between the front panel and the case panel to support the front panel from behind, wherein the front panel has at least a pair of engaging portions formed on an extension extending outward from the center of the through portion, A positioning reference portion that fits into the through portion and determines a reference position of the front panel, and a positioning portion that engages with each of the engagement portions and regulates rotation of the front panel about the positioning reference portion as an axis. Formed The Rukoto, possible to provide a meter device which can suppress the positional deviation of the front panel for the instrument body.

Further, according to the present invention, the positioning accuracy can be further improved by forming the front panel long in a predetermined direction and forming the engaging portion so as to sandwich the penetrating portion on the outer peripheral portion in the longitudinal direction. it can.

According to the present invention, the positioning accuracy can be further improved since the engaging portion is formed by a long hole extending toward the center of the through portion.

Further, according to the present invention, the positioning reference portion is provided with a rotation restricting portion which comes into contact with a part of the pointer and regulates a rotation range thereof, so that the stop position of the pointer can be prevented from varying. it can.

Further, according to the present invention, since the rotation restricting portion protrudes toward the rotation shaft, the size of the pointer can be suppressed.

Further, according to the present invention, the case body is provided with a hook portion which engages with an outer peripheral portion of the front panel.
Cost reduction can be achieved.

Further, according to the present invention, the indicator is made of a translucent material which emits light when supplied with light from the center of rotation, and the circuit board is provided with a light source for supplying light to the indicator, Since the portion has a light guide surface that guides light from the light source to the center of rotation of the indicator in a cylindrical shape surrounding the drive shaft, the illumination efficiency of the hands can be improved.

Further, according to the present invention, the display section has a light transmitting property of transmitting light from the light source, and the case body reflects the light from the light source around the positioning reference section toward the front panel. With such a reflective portion, the illumination efficiency of the front panel can be improved.

Further, according to the present invention, since the case body is made of a white synthetic resin material, the illumination efficiency can be further improved.

According to the present invention, cost reduction can be achieved because the light source comprises a single light source for illuminating the indicator and the display unit.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a speedometer according to an embodiment of the present invention.

FIG. 2 is a front view showing an assembled state of the speedometer of FIG. 1;

FIG. 3 is a sectional view taken along line AA of the speedometer shown in FIG. 2;

FIG. 4 is a cross-sectional view of the speedometer shown in FIG. 2 along the line BB.

FIG. 5 is a cross-sectional view of the speedometer shown in FIG. 2 along the line CC.

FIG. 6 is a partially enlarged cross-sectional view of a region indicated by an arrow D in FIG. 3;

FIG. 7 is a partially enlarged sectional view of an arrow E region in FIG. 3;

FIG. 8 is a partially enlarged sectional view of an arrow F region in FIG. 3;

FIG. 9 is a partially enlarged front view showing the regions indicated by arrows G and H in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Circuit board 2 Speedometer main body (instrument main body) 3 Pointer 4 Front panel 5 Case body 5a Hook part 6 Liquid crystal display 7 Colored panel 11-13 Hole part 14 Fitting part 15, 16 First engaging part 21 Drive shaft 22 Bearing part 23 Insertion pin 31 Pointer 32 Pointer cover 33 Rotation center part 34 Light receiving part 35 Pointer reflection part 36 Movable contact part 41 Measurement amount display part (display part) 42 Character display part 43 Notification display part 44 Ground part 45 Penetration portions 46, 47 Opening windows 48, 49 Second engagement portion (engagement portion) 51 First positioning reference portion 52, 53 First positioning portion 54 Holding portion 55 Housing portion 56 Reflection portion 57 Second positioning Reference part (positioning reference part) 57b Penetration window part 58, 59 Second positioning part (positioning part) 57a Rotation restricting part 61 Liquid crystal panel 62 Rubber connector 63 Cell holder 70 light guide surface L light source

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G01D 11/24 G01D 11/28 G01D 13/02 101

Claims (10)

(57) [Claims] 1. A circuit board, an instrument body mounted on the circuit board and having a drive shaft extending forward, a pointer having a linearly extending indicator mounted on a distal end side of the drive shaft, the pointer and the circuit A front panel having at least a display unit corresponding to the indicator and a penetrating unit corresponding to the drive shaft, disposed between the front panel and the circuit board; The front panel has at least a pair of engaging portions formed on an extension extending outward from the center of the through portion, and the case body fits into the through portion and has a front surface. An instrument device comprising: a positioning reference portion that determines a reference position of a panel; and a positioning portion that engages with each of the engagement portions and regulates rotation of the front panel around the positioning reference portion. . 2. The instrument device according to claim 1, wherein the front panel is formed to be long in a predetermined direction, and the engaging portion is formed on an outer peripheral portion in the longitudinal direction so as to sandwich the through portion. 3. The instrument device according to claim 1, wherein said engaging portion comprises a long hole extending toward a center of said through portion. 4. The positioning reference portion according to claim 1, wherein a rotation restricting portion is provided for contacting a part of the pointer and restricting a rotation range thereof. 6. The instrument device according to claim 1. 5. The instrument device according to claim 4, wherein the rotation restricting portion projects toward the rotation shaft. 6. The case body according to claim 1, wherein a hook portion is provided for engaging with an outer peripheral portion of the front panel.
The instrument device according to any one of claims 1 to 5. 7. The indicator is made of a translucent material that emits light by receiving light supplied from a rotation center portion, and a light source that supplies light to the indicator is provided on the circuit board, and the positioning reference portion is provided with the light source. 8. The light guide according to claim 1, further comprising a light guide surface having a cylindrical shape surrounding a drive shaft and guiding light from the light source to a center of rotation of the indicator. 9. Instrumentation equipment. 8. A reflecting portion in which the display portion has a light-transmitting property for transmitting light from the light source, and the case body reflects light from the light source to the front panel side around the positioning reference portion. The instrument device according to claim 7, comprising: 9. The instrument device according to claim 7, wherein the case body is made of a white synthetic resin material. 10. The instrument device according to claim 7, wherein the light source comprises a single light source for illuminating the indicator and the display unit.