JPH08193851A - Pointer for measuring instrument - Google Patents

Abstract

PURPOSE: To enhance the illuminating efficiency of a painter without increasing the number of components by applying an illuminating structure in which a bulb for illumination is arranged on the rear side of the pointer. CONSTITUTION: A pointer is a capped pointer, and a cap member 3 is formed integrally so as to comprise a pointer fixing and bonding part 31 which passes through a pointer base part 21 and which is fixed and bonded to a pointer shaft 12. The pointer base part 21 is formed so as to be provided with a first reflecting face 25 which is formed in such a way that it is situtaed on the rear side from a through hole 23 through which the pointer fixing and bonding part 31 is passed and that it reflects incident light L3 from a light-conducting plate 10 in the direction of a circumferential side face 28 of a pointer part 22 and the pointer base part 21 and with a second reflecting face 26 formed so as to be along the circumferential side face 28 in such a way that reflected light L4 reflected to the direction of the circumferential side face 28 on the first reflecting face 25 is reflected to the direction of the pointer part 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an instrument pointer applied to instruments such as speedometers and tachometers.

[0002]

2. Description of the Related Art As shown in FIGS. 5 and 6, a conventional instrument pointer 100 is a pointer with a cap and has a pointer base portion 1.
The pointer main body 101 and the pointer portion 112 are integrally formed of a translucent material, a balancer 102, and a non-translucent cap member 103.

The pointer base portion 111 of the pointer main body 101 is provided with a through hole 111b at a substantially central portion thereof, and a reflecting surface 11 is provided in a front portion closer to the pointer portion 112 than the through hole 111b.
1a is formed, and mounting holes 111c are formed on both sides of the through hole 111b.

The balancer 102 is made of high specific gravity metal C.
It is formed of a V-shaped plate, and mounting holes 102a are formed in both end portions thereof.

Further, the cap member 103 is formed in a substantially bottomed cylindrical shape, and a bottom portion 103a has a cylindrical pointer fixing portion 113 at a substantially central portion and the pointer fixing portion 113.
The mounting pins 114 are integrally formed at both side positions, and a U-shaped notch 115 is formed on the peripheral wall 103b.

Then, the cap member 103 allows the pointer fixing portion 113 to pass through the through hole 111b, the notch portion 115 is fitted to the base portion of the pointer portion 112, and the mounting pin 114 is inserted into the mounting hole 111C. And then the pointer base 11
1, the balancer 102 is attached to the pointer base 1
11 and the bottom portion 103a of the cap member 103, the mounting hole 102a is inserted into the mounting pin 114, and is assembled to the pointer base portion 111 on the rear side of the through hole 111b. Has been done.

In the pointer 100 thus constructed, the reflecting surface 111a is formed on the front part of the pointer base 111,
The balancer 102 is attached to the rear part of the balancer 102, and the weight balance between the front side and the rear side including the pointer portion 112 based on the pointer fixing portion 113 is maintained.

As shown in FIG. 5, the pointer 100 is attached to the instrument by inserting the pointer fixing portion 113 into the emitting hole 121 of the light guide plate 120 and fixing it to the pointer shaft 116, and is attached to the instrument by the light guide plate 120. The light L ₁ (front light guide) guided from the front end side of the light is collected from the front part of the pointer base 111, and is reflected by the reflecting surface 111a toward the pointer 112 (front reflection) so that the pointer 112 emits light. Has become. As described above, the pointer 100 is configured as a front light guide front reflection type.

Further, as shown in FIGS. 7 and 8, another conventional instrument pointer 200 is a pointer with a cap, and a pointer base portion 212 and a pointer portion 211 are integrally formed of a translucent material. Attached to the pointer main body 201 and the pointer base 212 of the pointer main body 201, and the pointer base 212 is attached to the pointer shaft 11
The pointer fixing member 202 fixed to the guide 6, the non-translucent cap member 203 adhered to the pointer base 212, and the balancer 204 fixed to the cap member 203 are roughly configured.

The pointer main body 201 includes a daylighting portion 212a formed at a substantially right angle on the rear side of the pointer base portion 212 opposite to the pointer portion 211, and a reflecting surface 212b formed on the outer side of the root of the daylighting portion 212a. It is formed with mounting holes 212c formed on both sides of the pointer base 212.

The pointer fixing member 202 has a cap fixing portion 221 provided with mounting brackets 221a on both sides, and a cylindrical pointer fixing portion 2 erected on the cap fixing portion 221.
22 and 22 are configured as a whole.

Further, the cap member 203 is formed in a substantially bottomed cylindrical shape, and is formed in a U-shape on the peripheral wall 203b and a pin 231 for attachment to the pointer base portion 212 integrally formed on the bottom portion 203a. And a notch portion 232 for fitting and fitting on the pointer portion 211.

Further, the balancer 204 is composed of a plate-shaped body of high specific gravity metal.

The pointer 200 is a cap member 203.
However, the mounting pin 231 is inserted into the mounting hole 212c to be attached to the pointer base portion 212 from the front surface side, and the pointer fixing member 202 causes the cap fixing portion 221 to contact the back surface side of the pointer base portion 212. At the same time, the mounting bracket 221a is fixedly attached to the mounting pin 231 projecting to the rear surface side, and the balancer 204 is attached to the pointer base portion 2.
12 of the lighting portion 212a and the peripheral wall 20 of the cap member 203
3b, and is assembled as a whole.

In the pointer 200 thus constructed, the reflecting surface 212b is formed at the rear of the pointer base 212,
Further, the balancer 204 is attached to the rear portion thereof, and the weight balance between the front side and the rear side including the pointer portion 211 is maintained with the pointer fixing portion 222 as a reference.

As shown in FIG. 7, the pointer 200 has a pointer fixing portion 222 inserted into the emission hole 223 of the light guide plate 220 and fixed to the pointer shaft 116 and attached to the instrument. The light L ₂ (rear light guide) guided from the rear side of 212 is collected from a light collecting section 202a provided at the rear of the pointer base section 212, and the reflecting surface 212b is also included.
To reflect to the side of the pointer portion 211 (front reflection) and guide portion 21
1 is made to emit light. In this way pointer 20
0 is configured as a rear light guide front reflection type.

The reference numeral 122 in FIGS. 5 and 7 is a dial.

[0018]

By the way, there are cases in which the illumination bulb is unavoidably disposed on the rear side of the pointer due to the design of the measuring instrument.

For example, as shown in FIG. 9, a fuel gauge 300, a speedometer 400, a tachometer 500,
And combination meter 7 incorporating water temperature gauge 600
In the case of 00, the bulb A for lighting is designed to measure each instrument 300, 4
A situation arises in which it must be installed between 00, 500 and 600. With such an arrangement of the illumination bulb A,
The pointers B of the measuring instruments 300 and 600 are illuminated from the rear side.

In the case of such rear illumination, when the front light guide front reflection type pointer 100 is applied as the pointer B, FIG.
As shown in (a), for example, the light guide plate 120 is formed in a substantially U-shape, and the reflection surface C is formed in each bent portion of the U-shape, and the light L ₁ of the illumination bulb A is reflected twice at each reflection surface C. From the tip end side of the pointer portion 112 of the pointer 100 by reflecting it, the exit hole 121
Light guide to the side (front light guide), and as shown in FIG.
It is designed to be reflected by the reflection surface 123 of 0 and be incident on the pointer base 111.

However, in this case, it is necessary to reflect the light L ₁ of the illumination bulb A located on the rear side of the pointer 100 twice by the light guide plate 120 in order to guide the light forward, which causes a loss of light in each reflection. There is a problem that the lighting efficiency is lowered.

On the other hand, in the case of the above-mentioned rear side illumination, the pointer B
When the rear light guide front reflection type pointer 200 is applied as
As shown in FIG. 10B, the light L ₂ of the illumination bulb A located on the rear side of the pointer 200 is guided to the exit hole 223 side by the light guide plate 220 without causing light loss due to reflection. (Backward light guide), as shown in FIG. 7, the light guide plate 120 is designed to be reflected by the reflection surface 224 and incident on the pointer base 212, and the illumination efficiency can be improved. Fixing member 202, cap member 2
No. 03 and balancer 204, and the increase in the number of parts and the number of assembling steps leads to higher cost.

That is, the pointer 200 has the pointer fixing portion 22.
2 is integrally formed with the cap member 203, and the pointer 1 described above is formed.
As in the case of No. 00, the cap member 203 can be attached by penetrating the pointer fixing portion 222 into the pointer base 212.
In this case the pointer fixing portion 222 so that prevent the path of light L ₂ located on the optical path reflected by the reflecting surface 212b,
It is necessary to separately form the pointer fixing member 202 and the cap member 203 and assemble them as described above, which results in an increase in the number of parts and the number of assembling steps.

The present invention has been made in order to solve the above-mentioned conventional problems, and its purpose is to be applied to an illumination structure in which an illumination bulb is arranged on the rear side of a pointer to increase the number of parts. It is to provide a pointer for an instrument that can improve the illumination efficiency of the pointer.

[0025]

In order to achieve the above-mentioned object, the invention according to claim 1 is such that the pointer main body has a pointer base portion and a pointer portion and is integrally formed of a light-transmissive material, and
The pointer base is a cap pointer with a non-translucent cap member attached to the pointer shaft, and the cap member has a pointer fixing portion that penetrates the pointer base and is fixed to the pointer shaft. The pointer base portion is located rearward of the through hole through which the pointer fixing portion penetrates and reflects incident light from the light guide plate toward the peripheral side surface of the pointer portion and the pointer base portion. And the second reflecting surface formed along the peripheral side surface so that the reflected light reflected by the first reflecting surface toward the peripheral side surface is reflected toward the pointer portion. And is formed.

The invention according to claim 2 is the pointer for a meter according to claim 1, wherein the first reflecting surface is an upper surface on the rear side of the through hole of the pointer base, It is characterized in that it is formed in a slanting shape on both sides of a central groove formed in the longitudinal direction of the pointer main body so as to communicate with the through hole at substantially the central portion of the upper surface.

[0027]

The invention according to claims 1 and 2 has the above-mentioned structure, and therefore has the following effect.

That is, according to the first aspect of the present invention, the pointer fixing portion fixed to the pointer shaft is formed integrally with the cap member despite the capped pointer, so that an increase in the number of parts can be suppressed. In addition, since the first reflecting surface is provided on the rear side of the through hole through which the pointer fixing portion of the pointer base portion penetrates, light from the illumination bulb located on the rear side of the pointer is accompanied by a loss of light. Instead, the light guide plate can efficiently enter the rear portion of the pointer base portion, and the incident light can be efficiently guided to the pointer portion by avoiding the pointer fixed portion by the first reflecting surface and the second reflecting surface.

Further, according to the second aspect of the invention, since the first reflecting surface is formed in a slope shape on both sides of the central groove communicating with the through hole of the pointer fixing portion, incident light on the pointer base portion is formed. With the first reflecting surface, it is possible to reliably reflect in the circumferential side surface direction of the pointer portion and the pointer base portion while avoiding the through hole.

[0030]

The present invention will be described in detail below with reference to the illustrated embodiments.

1 to 4 show a capped pointer 1 as an example.

The pointer 1 includes a pointer base portion 21 and a pointer portion 22.
A pointer main body 2 integrally formed with a transparent material, a non-translucent cap member 3 attached to a pointer base 21 of the pointer main body 2, and a balancer 4 made of a plate-like body made of high specific gravity metal. It is roughly composed of. (See Figure 3).

The pointer main body 2 is composed of a needle-shaped pointer portion 22 and a pointer base portion 21 formed in a bulging shape at the rear portion of the pointer portion 22, and the pointer base portion 21 penetrates substantially in the central portion. A hole 23 is formed, and a V-shaped portion which has a hole diameter width of the through hole 23 and communicates with the through hole 23 at a substantially central portion of an upper surface on the rear side of the through hole 23 and which is tapered rearward. A central groove 24 having a U-shaped cross section and having a groove width is formed in the longitudinal direction of the pointer main body 2.

Further, on both upper surfaces of the central groove 24 of the pointer base 21, first reflecting surfaces 25 are provided with incident light L ₃ from the light guide plate 10.
Is formed in a slanted shape so as to be reflected forward (toward the pointer portion 22) while avoiding the through hole 23 (see FIGS. 1 and 4).

Further, the second reflecting surface 26 is provided on the side surface corresponding to both sides of the through hole 23 of the pointer base 21 with the first reflecting surface 25.
Is formed along the peripheral side surface 28 of the pointer base 21 so as to reflect the reflected light L ₄ of the reflected light L ₄ toward the pointer 22 (reflected light L ₅ ) (see FIGS. 1 and 4A).

A bracket having a mounting hole 27 and protruding outward is formed at a portion of the pointer base 21 where the second reflecting surface 26 is formed.

Further, as shown in FIG. 3, the cap member 3 is formed in a substantially bottomed cylindrical shape, and the bottom portion 3a thereof has a
A cylindrical pointer fixing portion 31 is formed substantially in the central portion, and mounting pins 32 are integrally formed on both side positions of the pointer fixing portion 31, and a U-shaped notch portion 33 is formed on the peripheral wall 3b.
Are formed.

The pointer main body 2, the cap member 3, and the balancer 4 thus formed are assembled as shown in FIG. 2 to form the capped pointer 1.

That is, the pointer 1 is capped by penetrating the needle fixing portion 31 into the through hole 23, inserting the attachment pin 32 into the attachment hole 27, and fitting the notch portion 33 to the base portion of the indicator portion 22. The member 3 is attached to the pointer base portion 21, and the balancer 4 is mounted between the peripheral wall 3b of the cap member 3 and the rear end portion of the pointer base portion 21.

In the pointer 1 thus constructed, the first reflecting surface 25 is formed on the rear portion of the pointer base portion 21, and the balancer 4 is mounted on the rear portion side thereof, and the pointer fixing portion 31 is used as a reference. The weight balance between the front side and the rear side including the pointer portion 22 is maintained.

As shown in FIG. 2, the pointer 1 is attached to the instrument by inserting the lower end portion of the pointer fixing portion 31 into the emission hole 10a of the light guide plate 10 and also fixing and fixing the pointer shaft 12 onto the instrument. The light L ₃ (rear light guide) guided from the rear side of the pointer base portion 21 by 10 is collected from the rear portion of the pointer base portion 21 so that the first reflecting surface 25 avoids the through hole 23 and the pointer portion 22.
Some causes reflected to the to the second reflecting surface 26 direction is reflected as reflected light L _4, is reflected as reflected light L ₅ further the reflected light L ₄ to the guideline 22 direction by the second reflecting surface 26 (front reflector ) (Fig. 1, Fig. 4 (a),
(See (c)) The pointer portion 22 can be made to shine. In FIG. 2, reference numeral 11 is a dial.

That is, in the pointer 1, the first reflecting surface 25 and the second reflecting surface 26 guide the incident light L ₃ to the pointer base portion 21 in the direction of the pointer portion 22 while avoiding the pointer fixing portion 31.
2 can be made to shine.

Further, although the pointer 1 is a capped pointer, the pointer fixing portion 31 can be formed integrally with the cap member 3, so that the number of parts can be reduced and, as described above, the rear portion can be obtained. Since the light guide front reflection type is used, the light guide plate 10 is applied to an illumination structure in which an illumination bulb is arranged on the rear side of the pointer 1, and the light from the illumination bulb is guided by the light guide plate 10 without loss of light. It can be guided to the rear part (see FIG. 10B), and the pointer portion 22 can be made to shine efficiently together with the light guide by the first reflecting surface 25 and the second reflecting surface 26 described above.

[0044]

As described in detail above, the present invention has the following effects.

That is, according to the first aspect of the invention, the pointer fixing portion that is fixed to the pointer shaft is formed integrally with the cap member, despite the fact that the pointer has a cap.
Since the increase in the number of components can be suppressed and the first reflecting surface is provided on the rear side of the through hole through which the pointer fixing portion of the pointer base portion penetrates, the light from the illumination bulb located on the rear side of the pointer is provided. Light can be efficiently incident on the rear part of the pointer base by the light guide plate without causing light loss, and the incident light can be efficiently guided by avoiding the fixed part of the pointer by the first reflecting surface and the second reflecting surface. It can be guided to other parts and, as a result, can be applied to a lighting structure in which a lighting bulb is arranged on the rear side of the pointer to improve the pointer lighting efficiency without increasing the number of parts. Can be provided.

According to the second aspect of the present invention, since the first reflecting surface is formed in a slanting shape on both sides of the central groove communicating with the through hole of the pointer fixing portion, incident light to the pointer base portion is formed. Can be reliably reflected by the first reflecting surface in the peripheral side surface direction of the pointer portion and the pointer base portion while avoiding the through hole. As a result, in addition to the effect of claim 1, the pointer illumination efficiency is further improved. It can provide pointers for instruments.

[Brief description of drawings]

FIG. 1 is a perspective perspective view of a pointer main body applied to a capped pointer as an example.

FIG. 2 is a vertical cross-sectional view showing a mounted state of a cap pointer of FIG.

FIG. 3 is an exploded perspective view of the cap pointer of FIG. 1 viewed from the back side.

4 (a) is a plan view, FIG. 4 (b) is a sectional view taken along line bb of FIG. 4, and FIG. 4 (c) is a line cc of FIG. FIG.

FIG. 5 is a vertical cross-sectional view showing an attached state of a conventional capped pointer.

6 is an exploded perspective view of the cap pointer of FIG. 5 viewed from the back side.

FIG. 7 is a vertical cross-sectional view showing a state in which another conventional cap-attached pointer is attached.

FIG. 8 is an exploded perspective view of the cap pointer of FIG. 7 viewed from the back side.

FIG. 9 is a layout explanatory view of an illumination bulb of a conventional combination meter.

10A is a light guide explanatory diagram by the light guide plate when the capped pointer of FIG. 5 is applied, and FIG. 10B is a light guide explanatory diagram by the light guide plate when the capped pointer of FIG. 7 is applied. is there.

[Explanation of symbols]

1 Capped pointer (indicator for instrument) 2 Pointer main body 3 Cap member 10 Light guide plate 12 Pointer shaft 21 Pointer base 22 Pointer section 23 Through hole 24 Central groove 25 First reflection surface 26 Second reflection surface 28 Circumferential side surface (of the pointer base) ) 31 Pointer fixed part L ₃ light (incident light) L ₄ , L ₅ reflected light

Claims (2)

[Claims] 1. A pointer main body having a pointer base and a pointer is integrally formed of a translucent material, and the pointer base is attached to a pointer shaft by attaching a non-translucent cap member. A capped needle, wherein the cap member is integrally formed with a pointer fixing portion that penetrates the pointer base portion and is fixed to the pointer shaft, and the pointer base portion penetrates the pointer fixing portion. A first member that is located on the rear side of the through hole and that reflects incident light from the light guide plate toward the peripheral side surfaces of the pointer portion and the pointer base portion.
It is formed by including a reflecting surface and a second reflecting surface formed along the peripheral side surface so that the reflected light reflected by the first reflecting surface toward the peripheral side surface is reflected toward the pointer portion. A pointer for measuring instruments characterized by 2. The instrument pointer according to claim 1, wherein the first reflecting surface is an upper surface on the rear side of the through hole of the pointer base, and the penetrating hole is provided in a substantially central portion of the upper surface. An instrument pointer, which is formed in a sloped shape on both sides of a central groove formed in the longitudinal direction of the pointer main body so as to communicate with the hole.