JP2524934Y2 - Instrument dial fixing structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dial fixing structure for an instrument for fixing a dial to a light guide.

[0002]

2. Description of the Related Art In recent years, there has been proposed an instrument using a pointer which emits light by light from a light source guided by a light guide, for reasons such as improvement in visibility and design. FIG. 3 is an exploded perspective view showing an example of the above-mentioned conventional dial fixing structure of the instrument.

[0003] In FIG. 3, reference numeral 11 denotes a prism as a light guide, and portions expanded below both ends are incident portions 11al and 11ar into which light from a light source not shown is incident.
A hole 11b through which a pointer hammer 41as of a pointer 41 described later is inserted is provided at the center, and the periphery of the hole 11b is an emission part 11c for emitting light, and the emission part 11c is
An annular bulge is formed with a thickness corresponding to the dial 21 described later.
Have been. In addition, a reflection part (not shown) for reflecting light to the emission part 11c is provided on a surface opposite to the emission part 11c.

Reference numeral 21 denotes a dial fixed to the upper surface of the prism 11. A pointer 41as of a pointer 41 is inserted into the center of the dial, and a hole 21a through which the light from the emission section 11c of the prism 11 passes is formed by the emission section 11c. And a character (including characters and symbols) 21b as information indicated by the hands 41 is provided on the upper surface (front surface). 31 is a dial 21 on the upper surface of the prism 11
2 shows a double-sided tape as an adhesive for fixing the tape.

Reference numeral 41 denotes a pointer, a pointer base not shown, a front pointer portion 41af integrally provided on the right side of the pointer base, and a front pointer portion integrally provided on the left side of the pointer base. Rear pointer portion 41 on the straight line of 41af
The ab is provided integrally with the center of the lower surface of the pointer base, and comprises a hanging pointer hakama 41as and a cap 41b which covers the pointer base. The portion of the lower surface of the pointer base where the pointer hakama 41as is not provided is the prism 11
Is an incident part on which light from the emission part 11c is incident.

Next, the attachment and operation of the dial will be described. First, the attachment of the dial 21 will be described. After attaching the double-sided tape 31 to two places on the upper surface of the prism 11, the center of the hole 21a is aligned with the center of the hole 11b, and the back of the dial 21 is attached to the double-sided tape 31. Then
The dial 21 can be fixed to the prism 11.

The hands 41 can be attached to the movement by inserting the hands 41as of the hands 41 into the holes 21a and 11b and fitting the hands 41as of the hands 41 to a shaft of a movement (not shown).

Next, the operation will be described. Light from a light source (not shown) enters the prism 11 from the incident portions 11al and 11ar and is guided and reflected by the reflecting portion (not shown). The light enters, and only the front pointer portion 41af or the front pointer portion 41af and the rear pointer portion 41ab emit light.

Therefore, when the shaft of the movement rotates, the pointer 41 also rotates, and the light emitting front pointer portion 4
Since 1af indicates the character 21b on the dial 21, the visibility is improved.

FIG. 4 is an exploded perspective view showing another example of the conventional dial fixing structure of an instrument. The same parts as those in FIG. In FIG. 4, reference numeral 12 denotes a prism as a light guide, and a portion expanded below both ends has an incident portion 12 into which light from a light source (not shown) enters.
al, 12ar, and a pointer hakama 41a of the pointer 41 in the center
s a hole 12b is provided to be inserted, around the hole 12b is an emitting unit 12c that emits light, the emitting portion 12
c is an annular bulge having a thickness corresponding to the dial 22 described later.
Is formed. Then, the tongue piece 51 of the dial holder 51 described below is partially overlapped with the emission portion 12c.
Holes 12d ₁ , 1 into which b ₁ , 51b ₂ , 51b ₃ are inserted
2d ₂ and 12d ₃ are provided.

A reflecting portion (not shown) for reflecting light to the emitting portion 12c is provided on a surface opposite to the emitting portion 12c, and a locking portion 51b _{11 of the} tongue pieces 51b ₁ , 51b ₂ , 51b ₃ is provided. , catch, not shown for engaging the 51b _21, 51b ₃₁ is provided in the reflection portion.

Reference numeral 22 denotes a dial fixed to the upper surface of the prism 12. A pointer 41as of a pointer 41 is inserted into the center of the dial, and a hole 22a through which the light from the emission section 12c of the prism 12 passes is formed by the emission section 12c. provided in a size corresponding to, so as to partially overlap the holes 22a, the tongue piece _{51b 1,} 51b 2, holes _22b 1 to 51b ₃ is _inserted, 22b 2, 22b ₃ of the dial retainer 51 is provided In addition, a character (including characters, symbols, etc.) 22c as information indicated by the hands 41 is provided on the upper surface (front surface).

Reference numeral 51 denotes a dial holder for fixing the dial 22 on the upper surface of the prism 11, and includes an annular portion 51a,
Tongue piece 51 provided hanging down on this annular portion 51a
b _1, 51b _2, consists of 51b _3, the tongue piece 51b _1,
Engaging claw 51b _11, 51b _21, 51b ₃₁ towards the outside is provided at the distal end portion of 51b _2, 51b _3.

Next, the attachment and operation of the dial will be described. First, to describe the mounting of the dial 22, holes 22b ₁ in the hole 12d ₁ to 12d ₃ of the prism 12
22b ₃ and the dial 22 on the upper surface of the prism 12.
Are placed on the tongue pieces 51b ₁ , 51b of the dial holder 51.
_2, 51b ₃ holes 22b ₁ ~22b _3, 12d ₁ ~12
As each inserted into d _3, the engaging claw 51b _11, 51
Since b _21, 51b ₃₁ is engaged by an elastic force to the engaging portion of the prism 12 which is not shown, it is possible to fix the dial 22 to the prism 12.

The pointer 41 can be attached to the movement by inserting the pointer skirt 421as of the pointer 41 into the holes 22a and 12b and fitting the pointer to the shaft of a movement (not shown).

Next, the operation will be described. The light from the light source (not shown) enters the prism 12 from the incident portions 12al and 12ar and is guided and reflected by the reflecting portion (not shown). The light enters, and only the front pointer portion 41af or the front pointer portion 41af and the rear pointer portion 41ab emit light.

Therefore, the pointer 41 is rotated by the rotation of the movement shaft, and the light emitting front pointer portion 4
Since 1af indicates the character 22c on the dial 22, the visibility is improved.

[0018]

The conventional dial fixing structure of an instrument is constructed as described above. Therefore, in the dial fixing structure of the instrument shown in FIG. The adhesive force of the double-sided tape 31 changes with time, and the adhesive strength of the dial 21 to the prism 11 decreases.

If the dial 21 peels off from the prism 11 due to a change in the adhesive strength of the double-sided tape 31, there is an inconvenience that the hands 41 come into contact with the dial 21 and regular display cannot be performed.

On the other hand, in the instrument dial fixing structure shown in FIG.
2 can be firmly fixed, but since the dial holder 51 is newly required, the cost is increased.

Since holes 12d ₁ , 12d ₂ , 12d _{3 and the} like are provided in the reflecting portion and the emitting portion 12c of the prism 12, the brightness of the hands 41 is reduced by reducing the amount of light supplied to the hands 41. . Further, when the diameter of the cap 41b of the pointer 41 is reduced, there is an inconvenience that the dial holder 51 cannot be applied structurally.
Furthermore, when the dial holder 51 is used, the outer periphery thereof
It looks out of the outside of the cap 41b of 41 and looks good
There is a disadvantage that the image may be worse
Was.

This invention has been made in order to solve the above-mentioned inconveniences, and is inexpensive without impairing the appearance.
It can fix the dial and guide light from the light source behind the dial,
In addition, the dial can be firmly fixed and can be applied even if the diameter of the pointer cap is small. In addition, it is possible to eliminate the trouble and cost increase of manufacturing the light guide due to complicated shape. Provides structure.

[0023]

Means for Solving the Problems] dial fixing structure of the instrument according to this invention, in order to achieve the above object, the
At the dial position where the pointer cap faces, this cap
The dial part with a diameter slightly smaller than the diameter is a transparent part
The light reflected by the reflecting portion of the light guide,
To guide the pointer, and the transparency of the dial
A plurality of fitting holes are provided in a bright portion, and the fitting holes of the light guide are provided.
Into the fitting hole at the position corresponding to
Thus, a plurality of fixing pins for fixing the dial are provided .

[0024]

Since the dial fixing structure of the instrument according to the present invention is constructed as described above, a plurality of fixing pins are respectively fitted into corresponding fitting holes of the dial, and then the plurality of fixing pins are fixed. For example, the dial can be fixed to the light guide by melting the head portion. Also, in this invention
According to the dial fixing structure of the instrument, the reflective part of the light guide plate
The emitted light passes through the transparent part of the dial and is guided to the pointer
Guides the light reflected by the reflector to the pointer side of the dial
For example, a bulging portion that extends to the pointer side of this dial
Need not be formed on the light guide itself.
Complexity and increased cost of manufacturing light guides due to complicated shapes
Can be eliminated.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing a dial fixing structure of an instrument according to an embodiment of the present invention. The same parts as those in FIG. 3 or FIG.

In FIG. 1, reference numeral 13 denotes a prism serving as a light guide, and portions expanded below both ends are incident portions 13al and 13ar to which light from a light source not shown is incident.
In the center, a hole 13b through which the pointer hakama 41as of the pointer 41 is inserted is provided. The periphery of the hole 13b is an emission part 13c for emitting light, and fixing pins 13d ₁ and 13d are provided in the emission part 13c. _2, 13d ₃ are provided. It should be noted that the surface on the opposite side of the emission section 13c is provided with the emission section 13c.
As shown in FIG. 2 which will be described later,
3e is provided.

Reference numeral 23 denotes a dial fixed to the upper surface of the prism 13. A hole 23a is provided in the center of the dial 41 for inserting the pointer 41as of the pointer 41. The periphery of the hole 23a is a transparent portion 23b. Fitting holes 23c ₁ , 23c ₂ , 23c _{3 for} fitting fixing pins 13d ₁ , 13d ₂ , 13d ₃ of the prism 13 are provided in the portion 23, and characters (characters, characters,
Including symbols. ) 23d are provided on the upper surface (front surface). The diameter d of the transparent portion 23b is slightly smaller than the diameter D of the cap 41b of the pointer 41, the pointer
Insert 41 pointer hakama 41as into hole 23a of transparent part 23
In this state, the transparent part 23 faces the cap 41b and
So that the transparent portion 23 is located inside the cap 41b
Is configured .

FIG. 2 is an explanatory diagram for explaining the attachment and operation of the dial of the embodiment shown in FIG. In FIG. 2, reference numeral 23A denotes a transparent substrate forming the dial 23, 23B denotes a black coating layer forming the dial 23, and the transparent portion 23b is formed by not coating the black coating layer 23B on the transparent substrate 23A. , Characters 23d are similarly formed. 61 indicates the axis of the movement.

Next, the attachment and operation of the dial will be described. First, to describe the mounting of the dial 23, the prism 1 into the fitting hole 23c _1, 23c _2, 23c ₃
After 3 fixing pins 13d _1, 13d _2, 13d ₃ was fitted respectively, the fixing pins 13d _1, 13d _2, 13d ₃
As shown in FIG. 2, the dial 23 can be fixed to the prism 13 by melting the head with heat or ultrasonic waves.

The pointer 41 can be attached to the movement by inserting the pointer skirt 41as of the pointer 41 into the holes 23a and 13b and fitting the pointer 41as to the shaft 61 of the movement.

Next, the operation will be described. Light from a light source (not shown) enters the prism 13 from the incident portions 13al and 13ar, is guided and reflected by the reflecting portion 13e, and is fixed to the lower surface of the pointer base of the pointer 41 from the emitting portion 13c. _1, 13d _2, 13d ₃ incident through also the front guide part 41af only or front guide portions 41af and rear guidance portion 41ab, emits light.

Since the light guided by the prism 13 is also supplied to the character 23d, the character 23d also shines brightly.
Therefore, when the shaft 61 of the movement rotates, the hands 41 also rotate, and the dial 2
Since the shining character 23d of 3 is indicated, the visibility is improved.

As described above, according to this embodiment,Sentence
A new component for fixing the character plate 23 to the prism 13
It becomes unnecessary, and the dial 23 is fixed to the prism 13.
Fixed pin 13d of prism 13 ₁ , 13d ₂ , 13
d ₃ Hole 23c through which is inserted ₁ , 23c ₂ , 23c
₃ And this fitting hole 23c ₁ , 23c ₂ , 23c ₃ Is a letter
The transparent part 23b of the plate 23 is formed on the transparent part 23b.
b is a dial 23 where the cap 41b of the pointer 41 faces
Is provided with a diameter d slightly smaller than the cap diameter D.
Then, the dial 23 is prismed where it is hidden by the cap 41.
13 while fixing it inexpensively without deteriorating its appearance.
In the 23 places of the dial hidden by the
Do not reduce the amount of light guided by the
The guide 41 is efficiently guided further to the pointer 41 side and supplied.
Can be emitted without decreasing the luminance of the light.

Then, the dial 23 is formed by welding.
The dial 23 can be fixed to the dial 13 firmly.
be able to.

Further, the fixing pins 13d ₁ , 13d ₂ , 1
Since the dial 23 can be fixed by the 3d ₃ and the fitting holes 23c ₁ , 23c ₂ , 23c _3, it can be applied even if the cap diameter of the pointer 41 is small. Moreover, the transparent portion 23b is provided on the dial 23.
Is formed so as to correspond to the transparent portion 23b.
The emission part 13c of the prism 13 is formed to protrude toward the dial 23 side.
Because it is not necessary to expose the front side of the dial 23
The complicated shape of the prism 13 complicates manufacturing.
Therefore, it is possible to prevent the production cost from increasing.

In the above embodiment, the fixing pin 13
d _1, 13d _2, 13d ₃ and fitting holes 23c _1, 23
In the above description, _three c ₂ and 23 c 3 are provided.
In consideration of the luminance of the image, it is desirable to use two or three.

[0037]

[Effects of the invention] As described above , according to the invention, the guidelines
At the dial position facing the cap of
A slightly smaller diameter dial is used as a transparent part for the light guide.
The light reflected by the reflector is transmitted through the transparent part and becomes a pointer.
Along with guiding, a plurality of fitting holes are provided in the transparent part of the dial,
Insert through this fitting hole at the position corresponding to the fitting hole of the light guide.
Multiple fixing pins to fix the dial by welding
Is provided, the plurality of fixing pins are fitted into the corresponding fitting holes of the dial, and then the plurality of fixing pins are melted to fix the dial to the light guide.

Therefore, the dial is fixed to the light guide.
No new parts are required, and the dial is a light guide.
Hole for inserting the pin of the light guide to be fixed to the
A hole is formed in the transparent part of the dial, and this transparent part
Slightly larger than the cap diameter on the dial where the needle cap faces
Because it is provided with a small diameter, the sentence can be
While fixing the dial to the light guide at low cost without impairing the appearance,
Guide light from the light source where the dial is hidden by the cap
Efficient light guided by the plate without reducing the amount of light
The guide is supplied to the guide side without damaging the appearance,
Light emission can be performed without reducing luminance.

Then, the dial is fixed to the light guide by welding.
The dial can be fixed firmly.
Further, since the dial can be fixed by the plurality of fixing pins and the fitting holes, the present invention is applicable even if the diameter of the pointer cap is small. In addition, in order to guide the light reflected by the reflecting portion of the light guide to the pointer side of the dial, it is not necessary to form, for example, a bulging portion extending to the pointer side of the dial on the light guide itself. In addition, it is possible to eliminate the trouble of manufacturing the light guide and the cost increase due to the complicated shape.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a dial fixing structure of an instrument according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram for explaining attachment and operation of the dial of the embodiment shown in FIG. 1;

FIG. 3 is an exploded perspective view showing an example of a conventional dial fixing structure of an instrument.

FIG. 4 is an exploded perspective view showing another example of a conventional dial fixing structure of an instrument.

[Explanation of symbols]

13 prism 13aL, 13aR incident portion 13c emitting portion 13e reflecting portion 13d _1, 13d _2, 13d ₃ fixing pin 23 dial 23b transparency 23c _1, 23c _2, 23c ₃ fitting hole 23d character 41 pointer 41b cap 61 axis D, d diameter

Claims (1)

(57) [Scope of request for utility model registration] 1. A light guide that guides light from a light source with a light guide and that is provided with information indicated by a pointer that emits light by light reflected by a reflecting portion of the light guide. In the dial fixing structure of the instrument to be fixed to the dial, at the dial position where the cap of the hands faces,
Clear the part of the dial with a diameter slightly smaller than the
The light reflected by the reflecting portion of the light guide, the transparent portion
Along with transmitting the light to the hands, a plurality of fitting holes are provided in a transparent portion of the dial , and the fitting hole is provided at a position corresponding to the fitting hole of the light guide.
A plurality of the dials are fixed by inserting and welding
A dial fixing structure for an instrument , wherein a fixing pin is provided .