JP5060840B2 - Luminous pointer instrument - Google Patents

Description

  The present invention relates to a light emission pointer meter that emits a pointer using a light source, and more particularly to a light emission pointer meter that has excellent visibility and is suitable for use in a vehicle.

  For example, in an indicating instrument that displays with a pointer such as a speedometer for an automobile, not only the pointer is illuminated with a dial, but also by separately introducing light from a light source such as a light emitting element into the pointer. There is something that makes the pointer emit light. As an instrument equipped with such a light emission indicator, for example, one disclosed in Patent Document 1 is known.

  FIG. 8 is a cross-sectional view showing the structure of the light emission pointer meter described in Patent Document 1.

  The light emitting pointer instrument includes a dial 112, a movement 117 disposed on the back side of the dial 112, and a movement 117 on the back side of the dial 112 through the through hole 112a of the dial 112 from the front side of the dial 112. By connecting to the rotary shaft 118, the pointer 117 is driven to rotate in a plane substantially parallel to the dial 112 by the movement 117, and disposed behind the dial 112 in substantially parallel to the dial 112. A wiring board 116 and a light source (LED or the like) 120 for pointer illumination mounted on the wiring board 116 are included.

  The pointer 110 includes an instruction unit 110A that extends along the front side of the dial 112, and a light guide 110B that guides light from the light source 120 to the instruction unit 110A. The light guide 110 </ b> B is connected to the first light guide member 121 through the first light guide member 121 disposed on the front side of the dial 112 and the back side of the dial 112 and through the through hole 112 a of the dial 112. It is configured by a combination with the second light guide member 122.

  The first light guide member 121 has a needle-like part 121f that also serves as a main part of the instruction part 110A, and a shaft part 121a that extends vertically downward from the vicinity of the base part of the needle-like part 121f, and an end part of the shaft part 121a. The incident surface 121 d of the second light guide member 122 is coupled to the exit surface 122 n of the second light guide member 122. In addition, a reflection member 125 is provided at the abutting portion of the shaft part 121 a of the first light guide member 121, and the light incident from the second light guide member 122 and passing through the shaft part 121 a is formed by the reflection member 125. Reflected by the reflecting surface 121e to be guided in the direction of the needle-like portion 121f. The light guided to the needle-like part 121f is diffused while being repeatedly reflected, thereby illuminating the instruction part 110A.

  The second light guide member 122 includes a central shaft portion 122c connected to the rotation shaft 118 of the movement 117, and a wiring integrally formed with the central shaft portion 122c and disposed around the rotation shaft 118 of the movement 117. A conical wall portion 122a having a hem extending toward the light source 120 on the plate 116.

An annular light receiving surface 122d having a surface substantially perpendicular to the axis of the rotating shaft 118 is provided on an end surface of the conical wall portion 122a on the side where the skirt is widened. The light source 120d is provided on the light receiving surface 112d. The light emitted from is incident. The conical wall 122a is formed by providing an annular recess 122b on the bottom surface of the regular truncated cone. The light incident from the light receiving surface 122d is reflected by the first reflecting surface 122e formed by the outer peripheral wall of the conical wall portion 122a and the second reflecting surface 122f formed by the inner peripheral wall while repeating the first guide. The light reaches the incident surface 121d of the optical member 121, passes through the shaft portion 121a of the first light guide member 121, is reflected by the reflecting member 125 at the end, and is guided to the instruction portion 110A. In this case, the first reflecting surface 122e and the second reflecting surface are formed by simple tapered surfaces, and light incident from the light receiving surface 122d repeats planar reflection.
JP 2002-243508 A

  By the way, in the light emission pointer meter described in Patent Document 1 described above, the light incident on the light receiving surface 122d of the conical wall portion 122a of the second light guide member 122 is reflected on the reflecting surfaces 122e and 122f formed by simple tapered surfaces. Since the light is guided to the first light guide member 121 while being repeatedly reflected, there is a problem that the number of reflections is large and a loss occurs at each reflection, so that the illumination brightness of the indicator 110A of the final pointer 110 decreases. .

  In view of the above circumstances, an object of the present invention is to provide a light emission pointer meter that can increase the illumination brightness of a pointer indicating portion.

The invention of claim 1 includes a dial, a movement disposed on the back side of the dial, and rotation of the movement on the back side of the dial through the through-hole of the dial from the front side of the dial. By being connected to the shaft, the movement is driven to rotate in a plane substantially parallel to the dial by the movement, a wiring board disposed substantially parallel to the dial on the back side of the dial, A light source for illuminating the pointer mounted on the wiring board, the pointer extending along the front side of the dial, and a guide for guiding light from the light source to the indicator. A first light guide member disposed on a front side of the dial, and the first light guide member disposed on a back side of the dial and through a through hole of the dial. And a second light guide member coupled with the second light guide member. A central shaft connected to the rotation shaft of the movement, and a conical shape integrally formed with the central shaft and having a hem extending toward the light source on the wiring board disposed around the rotation shaft of the movement And light emitted from the light source that faces and is substantially perpendicular to the axis of the rotation axis is incident on an end surface of the conical wall portion on which the base of the conical wall portion is widened. An annular light-receiving surface is formed, and a first reflecting surface is provided on the outer peripheral wall of the conical wall portion to reflect light incident on the second light guide member from the light-receiving surface first. A concave surface curved outwardly in a concave shape along the direction of the generatrix of the conical wall so that one reflecting surface collects a large amount of light incident from the light receiving surface and convergently reflects toward the next second reflecting surface. A curved surface, and the second reflecting surface is formed on an inner peripheral wall of the conical wall and A light-emitting pointer instrument that consists of a tapered surface or a tapered convex surface which the reflected light is reflected toward the direction of the first light guide member from the reflection surface, the conical wall portion, a positive truncated cone The second reflecting surface is formed at the inner bottom corner of the circular recess, and the rotation shaft is connected to the center of the recess. Therefore, a shaft fixing member having at least an outer peripheral surface made of a white material is fitted into the center hole of the second light guide member, and the shaft hole formed in the shaft fixing member is fitted with the shaft hole. It is characterized in that the rotation shaft of the movement is inserted and fixed .

The invention according to claim 2 is the light emission indicator meter according to claim 1 , wherein the inner peripheral wall on the opening side of the concave portion is formed as a cylindrical surface substantially parallel to the rotation axis, and the cylindrical surface and the inner bottom surface of the concave portion The second reflecting surface is formed at an annular corner between the second reflecting surface, the second reflecting surface is a convex curved surface when viewed from the inside of the second light guide member, and the cylindrical surface and the inner bottom surface of the recess It is characterized by being comprised by the cyclic | annular curved surface which connects.

The invention of claim 3 is the light emission indicator meter according to claim 1 , wherein the inner peripheral wall on the opening side of the concave portion is formed as a tapered surface or a tapered curved surface, and the tapered surface or the tapered curved surface and the The second reflecting surface is formed at an annular corner between the inner bottom surface of the recess, and the second reflecting surface is a convex curved surface when viewed from the inside of the second light guide member and the tapered surface or It is characterized by comprising an annular curved surface that gently connects the tapered curved surface and the inner bottom surface of the recess.

  According to the first aspect of the present invention, the light emitted from the light source is guided to the first light guide member through the following path. That is, the light emitted from the light source on the wiring board is incident on the light receiving surface of the conical wall portion of the second light guide member facing the light source, and most of the light passes through the inside of the second light guide member. 1 is incident on the reflecting surface. The first reflecting surface is constituted by a concave curved surface, and most of the light incident on the first reflecting surface is reflected toward the second reflecting surface by the converging action of the concave surface, and is incident on the second reflecting surface intensively. To do. Since the light incident on the second reflecting surface is then reflected toward the first light guide member, it travels straight through the inside of the second light guide member or repeats the reflection several times. Guided to the light member. And the instruction | indication part of a pointer | guide is illuminated by the light introduced into the 1st light guide member. Therefore, by configuring the first reflecting surface to be a concave curved surface, as much light as possible can be guided to the first light guide member through the second reflecting surface with a small number of reflections, and by reducing the loss due to reflection, the pointer The illumination brightness of the instruction unit can be increased. In addition, since the light receiving surface of the conical wall portion is annular, when the pointer rotates, light can be received at an arbitrary position facing the light source, and the light is guided to the first light guide member. Can do. In this case, a plurality of light sources are preferably provided at equal intervals on the circumference around the rotation axis, but an annular light source may be used.

Further , the conical wall is formed by providing a recess on the bottom surface of the regular truncated cone, and the second reflection surface is formed at the inner bottom corner of the circular recess. Can be reflected toward a necessary direction (the direction of the first light guide member) without leaking in the useless direction. In addition, since the center hole for connecting the rotation shaft of the movement is provided in the inner bottom portion of the recess, a protruding portion of the movement can be put in the recess, which contributes to compactness. In particular, since the shaft fixing member having at least the outer peripheral surface made of a white material is fitted into the center hole of the second light guide member, the reflection efficiency by the peripheral wall of the center hole can be increased, which contributes to improvement in luminance it can.

According to the invention of claim 2 , since the inner peripheral wall on the opening side of the recess is formed as a cylindrical surface substantially parallel to the rotation axis, the light receiving surface located outside the recess can be made as wide as possible although there is a recess. , Can absorb a lot of light into the light-receiving surface without difficulty and contribute to the improvement of brightness.

According to the invention of claim 3 , since the inner peripheral wall on the opening side of the recess is formed as a tapered surface or a tapered curved surface, the reflected light from the first reflecting surface is efficiently reflected toward the first light guide member. be able to.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments in the case where a light emission indicator instrument according to the present invention is applied to an automobile speedometer will be described below with reference to the drawings.

  1 is a front view of the speedometer of the embodiment, FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1, FIG. 3 is a cross-sectional view of the main part, and FIG. FIG. 5 is a configuration diagram of a second light guide member used in the speedometer, and FIG. 5A is a cross-sectional view showing a state before the shaft fixing member is inserted into the second light guide member. FIG. 5B is a cross-sectional view showing a state where the shaft fixing member is inserted into the second light guide member, and FIGS. 6A and 6B are portions near the light receiving surface of the conical wall portion of the second light guide member. It is a figure which shows each example of a cross section.

  As shown in FIG. 1 and FIG. 2, this speedometer (light emission pointer meter) includes a case 1 having a concave reflecting plate portion 1 </ b> A on the front surface, and a turn-back portion 2 connected to the front end peripheral portion of the case 1. , A cover glass 3 for protecting the front surface held by the facing portion 2, a translucent dial 4 arranged on the front surface of the reflector 1 </ b> A of the case 1 and having a speed indication scale, and a back surface of the case 1 The back cover 5 covering the dial 4, the movement 7 disposed on the back side of the dial 4, and the movement 7 on the back side of the dial 4 through the central through hole 4 a of the dial 4 from the front side of the dial 4. By being connected to the shaft 8, the pointer 10 that is rotationally driven in a plane substantially parallel to the dial 4 by the movement 7, and a wiring board disposed substantially parallel to the dial 4 on the back side of the dial 4 6, a light source 20 for dial illumination mounted on the wiring board 6, and a dial Those with a light source 9 for bright, as main components.

  The movement 7 is attached and fixed to the back side of the wiring board 6 with the rotating shaft 8 protruding to the front side of the wiring board 6, and the light sources 20 and 9 are all mounted on the front surface of the wiring board 6. Here, LEDs (light emitting diodes) are used as the light sources 20 and 9, but other light sources may be used. The movement 7 is, for example, an electric type such as a cross coil type or a movable coil type, and rotates the rotary shaft 8 at an angle corresponding to the signal of the speed sensor by a separately provided drive circuit (not shown). Various electronic components (for example, resistors, capacitors, transistors, ICs, etc.) are mounted on the wiring board 6 to form a drive circuit for the movement 7.

  The pointer 10 extends along the front side of the dial 4 and includes an instruction unit 10A that is illuminated by light guided from the light source 20, and a light guide 10B that guides light from the light source 20 to the instruction unit 10A. .

  The light guide 10B is connected to the first light guide member 21 through the first light guide member 21 disposed on the front side of the dial 4 and the back side of the dial 4 and through the through hole 4a of the dial 4. It is configured by a combination with the second light guide member 22. The first light guide member 21 and the second light guide member 22 are made of a transparent resin (for example, acrylic, polycarbonate, etc.).

  As shown in FIG. 3, the first light guide member 21 includes a needle-like portion 21f that also serves as a part of the instruction portion 10A, a shaft portion 21a that protrudes vertically downward from the base portion of the needle-like portion 21f, and a shaft portion 21a. It has an incident surface 21d on the end surface and a reflecting surface 21e that faces the incident surface 21d and reflects the light incident from the incident surface 21d toward the needle-shaped portion 21f, and the base side of the front surface is covered by the pointer cap 12. It has been broken.

  In addition, the second light guide member 22 is formed integrally with the central shaft portion 22 c connected to the rotation shaft 8 of the movement 7 and the central shaft portion 22 c and disposed around the rotation shaft 8 of the movement 7. And a conical wall portion 22a having a skirt extending toward the light source 20 on the wiring board 6.

  An end surface of the central shaft portion 22c opposite to the movement 7 is an emission surface 22n toward the first light guide member 21, and is in close contact with the incident surface 21d of the first light guide member 21. That is, the pointer rod member 14 is provided around the shaft portion 21 a of the first light guide member 21, and the pointer rod member 14 is inserted into the locking hole 14 a formed in the cylindrical portion of the pointer rod member 14. By engaging the claw 22y on the outer periphery of the central shaft portion 22c of the second light guide member 22 inserted into the cylindrical portion, the first light guide member 21 and the second light guide member 22 are interposed via the pointer lever member 14. Are connected so that the entrance surface 22d of the first light guide member 21 and the exit surface 22n of the second light guide member 22 are brought into close contact with each other. The entrance surface 22d and the exit surface 22n are configured as surfaces perpendicular to the rotation axis L of the pointer 10 (coincident with the rotation axis of the movement 7).

  Further, the end surface of the second light guide member 22 on the side where the skirt of the conical wall portion 22a is widened forms a surface substantially perpendicular to the axis L of the rotation shaft 8 of the movement 7 and is emitted from the facing light source 20. An annular light receiving surface 22d on which incident light is incident is formed. In addition, the outer peripheral wall of the conical wall portion 22a is provided with a first reflecting surface 22e that first reflects light incident on the inside of the second light guide member 22 from the light receiving surface 22d. The first reflecting surface 22e collects a large amount of light incident from the light receiving surface 22d and reflects the light toward the second reflecting surface 22f in a convergent manner along the direction of the generatrix of the conical wall portion 22a. It is formed with a concave curved surface curved in a concave shape.

  The second reflecting surface 22 f is formed on the inner peripheral wall of the conical wall portion 22 a and is a tapered convex curved surface (reflected light from the first reflecting surface 22 e toward the first light guide member 21. Or a tapered surface). Further, on the upper side (first light guide member 21 side) of the first reflection surface 22e in the figure, the third light that receives the reflected light from the second reflection surface 22f and reflects it toward the first light guide member 21 side. A reflective surface 22g is provided. The third reflecting surface 22g is also constituted by a tapered concave curved surface (or tapered surface). Further, the outer peripheral surface and inner peripheral surface of the central shaft portion 22c are also reflecting surfaces 22g and 22h.

  In this case, the conical wall portion 22a is formed by providing a circular recess 22b in the center of the bottom surface of the regular truncated cone, and the second reflecting surface 22f is formed at the inner bottom corner of the circular recess 22b. Yes.

  As shown in FIGS. 5A and 5B, a center hole 22x is formed in the center of the recess 22b of the second light guide member 22 to connect the rotary shaft 8, and the center hole 22x. In addition, a shaft fixing member 23 having at least an outer peripheral surface made of a white material is fitted, and the rotation shaft 8 of the movement 7 is inserted and fixed in a shaft hole 23 a formed in the shaft fixing member 23.

  Moreover, the edge part of the conical wall part 22a is comprised like Fig.6 (a) or (b).

  In the example of FIG. 6A, the inner peripheral wall 22b1 on the opening side of the recess 22b is formed as a cylindrical surface substantially parallel to the rotation shaft 8, and is formed at the annular corner between the cylindrical surface and the inner bottom surface of the recess 22b. A second reflecting surface 22f is formed, and the second reflecting surface 22f is a convex curved surface when viewed from the inside of the second light guide member 22, and an annular curve that smoothly connects the cylindrical surface and the inner bottom surface of the concave portion 22b. It is composed of surfaces.

  In the example of FIG. 6B, the inner peripheral wall 22b2 on the opening side of the recess 22b is formed as a tapered surface or a tapered curved surface, and an annular shape between the tapered surface or the tapered curved surface and the inner bottom surface of the recess 22b is formed. A second reflecting surface 22f is formed at the corner, and the second reflecting surface 22f is a convex curved surface when viewed from the inside of the second light guide member 22, and the tapered surface or the tapered curved surface and the inner bottom surface of the concave portion 22b. It is comprised by the cyclic | annular curved surface which connects.

  Next, the operation will be described.

  The light from the light source 20 for illuminating the pointer reaches the first light guide member 21 via the second light guide member 22 to illuminate a part of the instruction portion 10 </ b> A of the pointer 10. Moreover, the light from the light source 9 for dial illumination illuminates the dial 4 from behind by being reflected directly or by the reflector 1A.

  Describing in more detail about the illumination of the instruction unit 10A of the pointer 10, light emitted from the light source 20 is guided to the first light guide member 21 through the following path.

  That is, the light emitted from the light source 20 on the wiring board 6 enters the light receiving surface 22d of the conical wall portion 22a of the second light guide member 22 facing the light source 20, as shown in FIG. Most of the light passes through the second light guide member 22 and is incident on the first reflecting surface 22e.

  The first reflecting surface 22e has a concave curved surface, and most of the light incident on the first reflecting surface 22e is reflected toward the second reflecting surface 22f by the converging action of the concave surface, and is reflected on the second reflecting surface 22f. Incidently incident. The light incident on the second reflecting surface 22f is then reflected toward the first light guide member 21, so that the light travels straight inside the second light guide member 22 or is reflected by the third reflecting surface 22g or the like. The light is guided to the first light guide member 21 while repeating the reflection several times. Then, the indicator 10 </ b> A of the pointer 10 is illuminated by the light introduced into the first light guide member 21.

  Therefore, by configuring the first reflecting surface 22e as a concave curved surface, as much light as possible can be guided to the first light guide member 21 through the second reflecting surface 22f, the third reflecting surface 22g, and the like with a small number of reflections. In addition, by reducing the loss due to reflection, the illumination brightness of the pointing portion 10A of the pointer 10 can be increased.

  Further, since the light receiving surface 22d of the conical wall portion 22a is annular, when the pointer 10 is rotated, light can be received at an arbitrary position facing the light source 20, and the light is first guided. It can be led to the member 21. In this case, a plurality of light sources 20 are provided at equal intervals on the circumference centered on the rotation shaft 8, and a uniform illumination effect can be obtained. An annular light source may be used as the light source 20.

  In the present embodiment, the conical wall portion 22a is formed by providing the concave portion 22b on the bottom surface of the regular truncated cone, and the second reflecting surface 22f is formed at the inner bottom corner of the circular concave portion 22b. Therefore, the light from the first reflecting surface 22e can be reflected in a necessary direction (the direction of the first light guide member 21) without leaking in a useless direction. Moreover, since the center hole 22x for connecting the rotating shaft 8 of the movement 7 is provided in the inner bottom part of the recessed part 22b, the protruding part of the movement 7 etc. can be put in the recessed part 22b, and it can contribute to compactization.

  In the present embodiment, since the shaft fixing member 23 having at least the outer peripheral surface made of a white material is fitted into the center hole 22x of the second light guide member 22, the peripheral wall (reflection surface 22h) of the center hole 22x. Can be improved, and can contribute to improvement in luminance.

  When the effect of the end shape of the conical wall portion 22a is examined, as shown in FIG. 6A, the inner peripheral wall 22b1 on the opening side of the concave portion 22b is a cylindrical surface substantially parallel to the rotation shaft 8. When formed, the light receiving surface 22d positioned outside the concave portion 22b can be made as wide as possible, although there is the concave portion 22b, so that a large amount of light can be easily taken into the light receiving surface 22d, which contributes to improvement in luminance.

  Further, as shown in FIG. 6B, when the inner peripheral wall on the opening side of the recess 22b is formed as a tapered surface or a tapered curved surface, the reflected light from the first reflecting surface 22e is efficiently guided to the first light. It can reflect toward the member 21.

  In the above embodiment, the case where the rotation shaft 8 of the movement 7 is fixed to the center hole 22x of the second light guide member 22 via the shaft fixing member 23 is shown. However, the second light guide as shown in FIG. The member 22B can also be used. When the second light guide member 22B is used, the rotation shaft 8 of the movement 7 is directly inserted and fixed in the center hole 22x of the second light guide member 22.

It is a front view which shows the structure of the speedometer as a light emission pointer meter of embodiment of this invention. It is II-II arrow sectional drawing of FIG. It is sectional drawing of the principal part of FIG. It is sectional drawing which shows the structure of the principal part of FIG. 2 combining the path | route of light. It is a block diagram of the 2nd light guide member used for the speedometer, (a) is sectional drawing which shows the state before inserting a shaft fixing member in a 2nd light guide member, (b) is a shaft fixing member 1st. It is sectional drawing which shows the state inserted in 2 light guide members. (A), (b) is a figure which shows each example of the partial cross section of the conical wall part of a 2nd light guide member. It is sectional drawing which shows another structural example of a 2nd light guide member. It is sectional drawing which shows an example of the conventional light emission pointer meter.

Explanation of symbols

4 Dial 4a Through-hole 6 Wiring board 7 Movement 8 Rotating shaft 10 Pointer 10A Indicator 10B Light guide 20 Light source 21 First light guide member 22 Second light guide member 22a Conical wall portion 22b Recessed portions 22b1, 22b2 Inner peripheral wall 22c Central shaft portion 22d Light receiving surface 22e First reflecting surface 22f Second reflecting surface 22x Center hole 23 Shaft fixing member 23a Shaft hole L Axis of rotation axis

Claims (3)

A dial, a movement disposed on the back side of the dial, and a through-hole of the dial from the front side of the dial to be connected to the rotation shaft of the movement on the back side of the dial; Mounted on the wiring board; a pointer driven to rotate in a plane substantially parallel to the dial by the movement; a wiring board disposed substantially parallel to the dial on the back side of the dial; A light source for pointer illumination,
The pointer comprises an indicator extending along the front side of the dial, and a light guide that guides light from the light source to the indicator, and the light guide is provided on the front side of the dial. A first light guide member disposed on the dial, and a second light guide member disposed on the back side of the dial and connected to the first light guide member through a through hole of the dial,
The second light guide member includes a central shaft portion connected to the rotation shaft of the movement, and the light source on the wiring board formed integrally with the central shaft portion and disposed around the rotation shaft of the movement. And has a conical wall with a hem extending toward the
An annular light receiving surface on which light emitted from the light source that forms a surface substantially perpendicular to the axis of the rotating shaft and faces is formed on the end surface of the conical wall portion on the side where the skirt spreads,
On the outer peripheral wall of the conical wall portion, a first reflecting surface is provided on which light incident on the inside of the second light guide member from the light receiving surface is first reflected,
The first reflecting surface is concavely curved outward along the direction of the generatrix of the conical wall so that a large amount of light incident from the light receiving surface is collected and reflected convergently toward the next second reflecting surface. Formed with a concave curved surface,
The second reflecting surface is formed on the inner peripheral wall of the conical wall portion, and is a tapered surface or a tapered convex curved surface that reflects the reflected light from the first reflecting surface toward the first light guide member. A light emission indicator instrument comprising:
The conical wall is formed by providing a circular recess at the center of the bottom of the regular truncated cone, and the second reflecting surface is formed at an inner bottom corner of the circular recess, A center hole is formed at the center of the shaft to connect the rotating shaft;
A shaft fixing member having at least an outer peripheral surface made of a white material is fitted into the center hole of the second light guide member, and the rotation shaft of the movement is inserted and fixed in the shaft hole formed in the shaft fixing member. emission indicating instrument, characterized in that is. The light emission indicator instrument according to claim 1,
An inner peripheral wall on the opening side of the recess is formed as a cylindrical surface substantially parallel to the rotation axis, and the second reflecting surface is formed at an annular corner between the cylindrical surface and the inner bottom surface of the recess. The light-emitting device is characterized in that the two reflecting surfaces are convex curved surfaces when viewed from the inside of the second light guide member and are formed by an annular curved surface that gently connects the cylindrical surface and the inner bottom surface of the concave portion. Pointer instrument. The light emission indicator instrument according to claim 1 ,
The inner peripheral wall on the opening side of the recess is formed as a tapered surface or a tapered curved surface, and the second reflecting surface is formed at an annular corner between the tapered surface or the tapered curved surface and the inner bottom surface of the recess. The second reflecting surface is a convex curved surface when viewed from the inside of the second light guide member, and the tapered surface or the curved surface that gently connects the tapered curved surface and the inner bottom surface of the concave portion. A luminescent indicator instrument characterized by comprising.

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