JP5110687B2 - Guideline structure - Google Patents

Description

  The present invention relates to a pointer structure used for a vehicle instrument, and more particularly to a pointer structure arranged on a dial.

As an example of a conventional pointer structure, as shown in FIGS. 3 and 4, a pointer cap 53 having a boss portion 52 is covered on the pointer portion 51 and disposed on the outer peripheral surface of a cylindrical boss portion 54 of the pointer portion 51. There has been proposed a structure in which a balance weight 56 is held on a plate portion 55 and disposed on a dial plate 57 (see, for example, Patent Document 1).
The example shown in FIG. 4 has a structure in which the distance h between the center of gravity A of the pointer part of the pointer part 51 and the upper surface of the internal unit 13 is further separated as compared with FIG.

JP 2003-247870 A

  However, in the conventional pointer structure as described in Patent Document 1, since the center of gravity is taken with the boss portion 52 of the pointer cap 53 as the central axis, the balance weight is placed on the plate portion 55 facing the indicating portion of the pointer portion 51. 56 is arranged. In particular, as shown in FIG. 4, in the case of the structure in which the indication portion of the pointer portion 51 is arranged away from the surface of the dial plate 57, the light incident portion 24 becomes long and the indication portion side of the pointer portion 51 becomes heavy. Therefore, it becomes necessary to increase the volume and weight of the balance weight 56. As a result, a large space for accommodating the large balance weight 56 is required, and there is a discomfort that the whole is increased in size. For this reason, there exists a possibility that the value of a moment of inertia may become large and a burden may be applied to the internal unit with which the boss | hub part 52 is couple | bonded.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a compact pointer structure capable of lowering the center of gravity and suppressing the moment of inertia with a simple structure.

In order to achieve the above-described object, the pointer structure according to the present invention is configured as follows.
(1) A light guide member that is formed in a substantially L shape, has a light incident portion at a proximal end portion and an instruction portion at a distal end portion, and guides light incident from a light source;
A pointer rod coupled to the rotating shaft of the inner unit and assembled to the light guide member;
A pointer cap attached to the light guide member;
A pointer structure that is rotated on a dial so that the light incident portion and the tip portion of the indication portion are located on opposite sides of the rotation shaft,
The pointer is characterized in that the light incident portion is provided with a thick portion at both ends in the circumferential direction of the rotating shaft, and the thick portion is provided on the inner unit side so as to penetrate the pointer rod. Construction.

According to the invention described in (1) above, since the thick portion is provided at both ends in the circumferential direction of the rotation shaft of the internal unit in the light incident portion, this thick portion does not increase the outer shape of the light guide member. It will function as a balancer as it is. Further, since the thick portion is provided on the inner unit side so as to penetrate the pointer rod, the center of gravity of the pointer can be brought closer to the inner unit side.
Thereby, even if the indicating part of the pointer is arranged away from the surface of the dial, the value of the moment of inertia does not increase and the internal unit is not burdened. In addition, since there is no need to equip a balance weight like the conventional one, a large space for accommodating the balance weight is not required, so the size is reduced and the simple structure lowers the center of gravity to keep the moment of inertia small. Can do.

  According to the pointer structure according to the present invention, it is possible to provide a compact pointer structure capable of lowering the center of gravity and suppressing the moment of inertia with a simple structure.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

  1 and 2 show an embodiment of a pointer structure according to the present invention. FIG. 1 is a sectional view of a vehicle instrument to which the pointer structure according to an embodiment of the present invention is applied. FIG. It is a disassembled perspective view of the pointer | guide in a vehicle meter.

  As shown in FIG. 1, a vehicular instrument 10 to which a pointer structure according to an embodiment of the present invention is applied includes a speedometer 11, a tachometer (not shown), a fuel fuel gauge, a water temperature gauge, and an accumulator. And a warning indicator, a shift indicator indicator, a turn signal indicator, and a liquid crystal display (LCD: Liquid Crystal Display) multi-information display. The board 12, the speedometer movement 13 which is an internal unit, the wiring board 14, the LED 15 which is a light source, the speedometer pointer 16 which is a pointer, a turn not shown, a front cover which is also not shown, And a back cover as shown. In addition, although the following description is given only about the speedometer 11, since it has the same structure also in a tachometer, the description is abbreviate | omitted.

  The dial 12 is provided with a scale / number (display design) 17 for speed display on its surface by printing or the like, and a pointer hole 18 is formed in the substantially central portion of the vehicle instrument 10. In addition to the scale / number 17, various display designs can be appropriately provided on the dial 12.

  The speedometer movement 13 is, for example, a cross coil type or a stepping motor type, and is attached to the back surface of the wiring board 14. The rotating shaft 19 of the speedometer movement 13 is coupled to the speedometer pointer 16 via a pointer rod 21 described later, and rotates according to a pulse signal given from a meter controller (not shown) corresponding to the speed of the vehicle. Moved.

  The wiring board 14 is attached to the back side of the vehicle instrument 10, and electrical elements (not shown) and LEDs 15 are mounted on a printed wiring (not shown) formed on the front surface and the back surface.

  The LED 15 is a light emitting diode, and corresponds to a predetermined position on the wiring board 14, that is, the emitted light at the rear of the dial hole 18 of the dial 12 or the rear of the dial 12 corresponding to a necessary position. Has been implemented.

  The speedometer pointer 16 includes a light guide member 20, a pointer rod 21, and a pointer cap 22, and further includes a pair of thick portions 23 on the light guide member 20.

The light guide member 20 is formed in a substantially L shape using a polymer material such as a transparent resin, for example, and has a light incident portion 24 at a proximal end portion and a tapered shape at a distal end portion. Part 25.
The light guide member 20 is not limited to being colorless and transparent, and may be a transparent color such as orange or yellow.

  The pointer rod 21 is formed in a substantially L-shape similar to the light guide member 20 using a dark opaque resin, and has a boss 26 protruding toward the speedometer movement 13 side, and has a disk shape. The base portion 27 has a base portion 27 formed at the base end portion, and an extended portion 28 that extends from the outer edge portion of the base portion 27 in an L shape. The guide rod 21 is formed with a light guide member insertion hole 29 which is a fan-shaped opening on the side of the hook base portion 27 opposite to the extending portion.

  The pointer cap 22 is molded using the same resin as that of the pointer rod 21, has a main cover portion 30 having a substantially dome shape at the base end portion, and a notch 31 cut into a slit shape is formed in the upper portion. A sub cover portion 32 is provided at the tip portion.

  The thick-walled portion 23 is formed integrally with both ends of the light incident portion 24 in the circumferential direction of the rotating shaft 19 so as to have a predetermined volume on the light guide member 20.

  That is, the speedometer pointer 16 is guided onto the extension portion 28 of the pointer rod 21 by inserting the light incident portion 24 including the thick portion 23 of the light guide member 20 into the light guide member insertion hole 29 of the pointer rod 21. The indicator portion 25 of the optical member 20 is placed, and the pointer cap 22 is attached to the light guide member 20. The speedometer pointer 16 has the light incident portion 24 of the light guide member 20 in the pointer hole 18 of the dial 12 by connecting the boss 26 of the pointer rod 21 to the rotation shaft 19 of the speedometer movement 13. Arranged and rotated on the dial 12 together with the rotation shaft 19.

  That is, the speedometer pointer 16 is rotated on the dial 12 by the speedometer movement 13 so that the light incident portion 24 and the tip portion of the instruction portion 25 are located on opposite sides of the rotation shaft 19. It will be.

Next, the operation of this embodiment will be described.
When the LED 15 emits light, the emitted light of the LED 15 arranged corresponding to the light incident part 24 of the light guide member 20 is incident on the light incident part 24, and the incident light of the LED 15 is guided to the instruction part 25, By emitting light from the notch 31 in the sub cover portion 32 of the pointer cap 22, the scale / number 17 on the dial 12 is indicated.

  Here, the speedometer pointer 16 is from the speedometer movement 13 of the support portion including the instruction portion 25 of the light guide member 20, the extension portion 28 of the pointer rod 21, and the auxiliary cover portion 32 of the pointer cap 22. Even when the distance L1 is sufficiently larger than the conventional one, the thick portion 23 is penetrated through the light guide member insertion hole 29 of the pointer rod 21 together with the light incident portion 24 of the light guide member 20, The center of gravity position A of the speedometer pointer 16 as a whole is set sufficiently close to the dial 12, that is, the position of the center of gravity is lowered, so that the moment of inertia of the speedometer movement 13 due to the weight of the pointer is significantly reduced. .

Further, the structure of the speedometer pointer 16 will be described in detail with reference to FIG.
As shown in FIG. 2, the light incident portion 24 of the light guide member 20 is formed with a pair of brackets 34 having boss holes 33 protruding from both sides. Further, boss holes 35 corresponding to the respective boss holes 33 of the bracket 34 are formed through the heel base portion 27 of the pointer ridge 21. A boss (not shown) is formed on the back surface of the main cover portion 30 of the pointer cap 22 so as to coincide with each boss hole 33 of the bracket 34.

  A pair of thick portions 23 are provided at both ends in the circumferential direction of the rotation shaft 19 of the light incident portion 24 of the light guide member 20.

  The thick portions 23 are not limited to being provided in a pair in the light incident portion 24, and may be provided in, for example, two pairs according to the volume of the speedometer pointer 16. Further, even if the thick portion 23 is formed as a separate part before assembling and is attached to the light incident portion 24 integrally using a bonding means such as an adhesive, the same effect can be obtained. However, it is preferable that the light guide member 20 is integrally formed by injection molding or the like from the viewpoint of manufacturing cost reduction.

  The speedometer pointer 16 has the boss hole 35 in the hook base portion 27 of the pointer rod 21, the boss hole 33 in the bracket 34 of the light guide member 20, and the boss on the back surface of the main cover portion 30 of the pointer cap 22. In addition, the pointer rod 21 and the pointer cap 22 are integrally assembled with the light guide member 20 interposed therebetween.

  As described above, according to the pointer structure of the present embodiment, the light incident portion 24 is provided with the thick portions 23 at both ends in the circumferential direction of the rotation shaft 19 of the speedometer movement 13, so that the thick portions 23 are The light guide member 20 functions as a balancer without increasing the outer shape of the light guide member 20. Further, since the thick portion 23 is provided on the speedometer movement 13 side so as to penetrate the hook base portion 27 of the pointer rod 21, the position of the thick portion 23 can be lowered to lower the center of gravity.

  Thereby, even if the instruction | indication part 25 is arrange | positioned away from the surface of the dial 12, the value of a moment of inertia does not become large and the speedometer movement 13 is not burdened. In addition, since there is no need to equip a balance weight like the conventional one, a large space for accommodating the balance weight is not required, so the size is reduced and the simple structure lowers the center of gravity to keep the moment of inertia small. Can do.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimension, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

It is sectional drawing of the meter for vehicles to which the pointer structure which concerns on one Embodiment of this invention is applied. It is a disassembled perspective view of the pointer in the vehicle meter of FIG. It is sectional drawing of the conventional pointer structure. It is sectional drawing of the other conventional pointer structure.

Explanation of symbols

10 Vehicle Instruments 11 Speedometer 12 Dial 13 Speedometer Movement (Internal Unit)
15 LED (light source)
16 Speedometer Guidelines (Guidelines)
20 Light guide member 21 Pointer rod 22 Pointer cap 23 Thick part 24 Light incident part 25 Instruction part

Claims (1)

A light guide member that is formed in a substantially L shape, has a light incident portion at a proximal end portion and an instruction portion at a distal end portion, and guides light incident from a light source;
A pointer rod coupled to the rotating shaft of the inner unit and assembled to the light guide member;
A pointer cap attached to the light guide member;
A pointer structure that is rotated on a dial so that the light incident portion and the tip portion of the indication portion are located on opposite sides of the rotation shaft,
The pointer is characterized in that the light incident portion is provided with a thick portion at both ends in the circumferential direction of the rotating shaft, and the thick portion is provided on the inner unit side so as to penetrate the pointer rod. Construction.

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