JP2009210453A - Instrument device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an instrument device with excellent responsiveness and vibration resistance without complicating a member shape, concerning an instrument device equipped with a display board having a variable display part and a pointer moving along the front surface side of the display board. <P>SOLUTION: The instrument device includes: an illumination means 22 provided on the rear surface side of a display board 21; a guide rail part 23 provided on the front surface side of the display board 21, on which a pointer 24 is disposed; a holding part 25 holding the pointer 24 movably along the guide rail part 23, and having an opening part 25c on the bottom surface; an incidence part 24c formed integrally with the pointer 24, and arranged on the opening part 25c, for emitting light from the pointer 24 by allowing incidence of light from the illumination means 22; a first magnet 25d provided on the pointer 24 or on the holding part 25; and a second magnet 26a provided on pointer driving means 26, 27 oppositely to the first magnet 25d. The pointer 24 is moved in linkage with rotating driving of the pointer driving means 26, 27 by attraction of the first and second magnets 25d, 26a. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an instrument device that includes a display board having a variable display section and a pointer that moves on the front side of the display board.

  2. Description of the Related Art Conventionally, there is an instrument device that displays predetermined information by indicating an indicator portion of a dial (display plate) with a pointer. In such an instrument device, the pointer is directly fixed to a rotation shaft of a pointer driving means such as a stepping motor, and the indicator is indicated by rotating the pointer in conjunction with the rotational driving of the pointer driving means. It is.

  In addition, the instrument device is provided with a large variable display unit such as a liquid crystal display unit at the center of the display plate, and is provided with a pointer for displaying predetermined information on the variable display unit and moving around the variable display unit. There exists a thing of the structure which displays the predetermined information by a pointer | guide instruction | indication, for example, it is disclosed by patent document 1. FIG.

The instrument device disclosed in Patent Literature 1 is configured to use a pointer having a shape refracted so as to bypass the variable display portion from the rear surface side to the front surface side of the display plate.
JP 2006-98160 A

  However, in the instrument device configured as disclosed in Patent Document 1, the pointer is long and heavy because the pointer has a complicated structure, and the pointer cannot be rotated with good responsiveness. There was a problem. Further, since the pointer is only fixed to the pointer driving means, there is a problem that the vibration resistance is insufficient when the pointer is used in a vehicle instrument having a severe usage environment. Therefore, there was room for further improvement as an instrument device.

  The present invention has been made in view of the above-described problems, and is an instrument device that includes a display plate having a variable display portion and a pointer that moves on the front side of the display plate, and responds without complicating the shape of the members. An object of the present invention is to provide an instrument device having excellent performance and vibration resistance.

  In order to solve the above problems, the present invention provides a display panel having a variable display unit, a pointer that moves on the front side of the display board, and a pointer drive that is provided on the rear side of the display board and moves the pointer A lighting device provided on the rear side of the display plate, a guide rail portion provided on the front side of the display plate, on which the pointer is disposed, and the pointer A holding portion that is movably held along the guide rail portion and has an opening on the bottom surface, and is formed integrally with the pointer, and is disposed in the opening to receive light from the illumination means, and the pointer An incident portion that emits light, a first magnet provided on the pointer or the holding portion, and a second magnet provided on the pointer driving means so as to face the first magnet, By the attractive force of the first and second magnets The serial guidance to and moving in conjunction with the rotation drive of the pointer drive means.

  Further, the guide rail portion has a slit portion at a location facing the incident portion.

  The illuminating means includes a light source and a light guide member that guides light from the light source to the variable display portion and the incident portion, respectively.

  In addition, a cover body that covers the incident portion as viewed from the user's viewing direction is provided.

  The present invention relates to an instrument device including a display board having a variable display section and a pointer that moves on the surface side of the display board, and has excellent responsiveness and vibration resistance without complicating the shape of the member. is there.

  Hereinafter, a first embodiment in which the present invention is applied to a vehicle combination meter will be described with reference to the accompanying drawings.

  In FIG. 1, 1 is a housing. The housing 1 has a turning member and a case body, and houses four indicator meters, that is, a speedometer 2, a tachometer 3, a fuel meter 4 and a water temperature meter 5. The speedometer 2 is larger than the tachometer 3, the fuel gauge 4 and the water temperature gauge 5, and is disposed between the tachometer 3, the fuel gauge 4 and the water temperature gauge 5. The speedometer 2 has a display board 21 and a pointer 24. The tachometer 3, the fuel gauge 4 and the water temperature gauge 5 have dials 31, 41, 51 and pointers 32, 42, 52, respectively. The dial plates 31, 41, 51 are three-dimensionally formed on the substrate made of a translucent resin (for example, polycarbonate), and the light shielding portions are printed except for the character portions 3b, 4b, 5b. Formed. The hands 32, 42, and 52 are rotated by a stepping motor (not shown), and indicate the indicator portions 3a, 4a, and 5a of the dial plates 31, 41, and 51.

  FIG. 2 is an enlarged sectional view of a main part. The speedometer 2 includes a display board 21, an illumination unit 22, a guide rail part 23, a pointer 24, a holding part 25, an arm member 26, and a stepping motor 27. Reference numeral 28 denotes a circuit board, and a stepping motor 27 is mounted on the circuit board 28.

  The display board 21 includes a light-transmitting substrate 21a and a liquid crystal display unit (variable display unit) 21b.

  The translucent substrate 21a is made of a translucent resin (for example, acrylic or polycarbonate). In addition, on the translucent substrate 21a, the indicator portion 2a is provided in a three-dimensional manner so as to be positioned around the liquid crystal display portion 21b according to the movement range of the pointer 24, and the character portion 2b is formed by cutting or the like. ing.

  The liquid crystal display unit 21b is obtained by bonding polarizing plates to both sides of a liquid crystal cell in which liquid crystal is sealed in a pair of transparent substrates on which a transparent electrode film is formed, and is a dot matrix type liquid crystal display, for example. . The display content of the liquid crystal display unit 21b can be changed. For example, the liquid crystal display unit 21b selects and displays various information such as total travel distance, fuel consumption, or warning information.

  The illumination means 22 includes a light source 22a made of an LED or the like, and a light guide member 22b made of a translucent resin such as polycarbonate and guiding light from the light source 22a to a liquid crystal display portion 21b and an incident portion 24c of a pointer 24 described later. , Has. The light guide member 22b is formed to have a larger area than the liquid crystal display portion 21b so as to face the incident portion 24c.

  The guide rail portion 23 is provided on the display plate 21 so as to surround the periphery of the liquid crystal display portion 21b, and is formed by forming a translucent resin in a ring shape as shown in FIG. 3, for example. . Moreover, the guide rail part 23 has the recessed part 23a which can accommodate the pointer | guide 24 as shown in FIG. 4, and has the concave-shaped guide part 23b in which the control part of the holding | maintenance part 25 mentioned later is arrange | positioned in the bottom part. Further, the guide rail portion 23 has a slit portion 23c at the bottom thereof at a position facing the incident portion 24c so that the light L emitted from the illumination unit 22 toward the incident portion 24c of the pointer 24 can pass therethrough. The guide rail portion 23 is covered with a decorative ring (cover body) 2c provided on the front surface side of the display plate 21 so that it cannot be seen by the user.

  As shown in FIGS. 2 and 4, the pointer 24 is made of a light-transmitting resin such as polycarbonate. One end of the pointer 24 is disposed on the guide rail portion 23, and the pointer base 24a An indicator portion 24b extending from the other end portion and indicating the indicator portion 2a; an incident portion 24c integrally formed at one end portion of the pointer base portion 24a and fitted into an opening portion 25c of a holding portion 25a described later; Consists of. The pointer 24 moves around the liquid crystal display portion 21b along the guide rail portion 23 to indicate the indicator portion 2a and displays predetermined information (vehicle speed in the present embodiment). Further, the light L emitted from the illumination unit 22 is incident from the incident portion 24c and causes the pointer 24 to emit light. In addition, the incident part 24c is covered with the decoration ring 2c provided in the front side of the display board 21, and is not visually recognized from a user's visual recognition direction.

  The holding part 25 is made of, for example, a light-blocking resin material such as ABS resin. The holding part 25a holds the pointer 24 movably along the guide rail part 23 in the guide rail part 23, and the bottom part of the mounting part 25a. And a restriction portion 25b and an opening portion 25c. The restricting portion 25 b is a protruding portion that protrudes downward from the placement portion 25 a, and is disposed on the guide rail 23 b that is provided in a concave shape in accordance with the shape of the restricting portion 25 b on the guide rail portion 23, and the guide rail portion 23 of the pointer 24. The arrangement position with respect to is determined. It is also possible to set the angle formed by the guide rail portion 23 and the pointer 24 to a predetermined angle by adjusting the shapes of the restricting portion 25b and the guide portion 23b. The opening 25 c is for arranging the incident portion 24 c of the pointer 24 and is formed so as to face the slit portion 23 c of the guide rail portion 23.

  In addition, a first magnet 25d and a first yoke 25e are disposed on the mounting portion 25a of the holding portion 25 so as to be positioned around the pointer 24. The first magnet 25d and the first yoke 25e may be disposed directly on the pointer 24.

  The first magnet 25d is disposed so as to be positioned around the pointer base 24a housed in the guide rail portion 23. The first magnet 25d attracts each other with a second magnet 26a described later.

  The first yoke 25e is provided on the surface (non-opposing surface) side that does not face the second magnet 26a of the first magnet 25d. The first yoke 25e constitutes a magnetic circuit that suppresses leakage magnetic flux from the non-facing surface side of the first magnet 25d and improves magnetic efficiency.

  The arm member 26 has a second magnet 26 a and a second yoke 26 b at one end, and the other end is fitted to the rotating shaft 27 a of the stepping motor 27. The pointer driving means in the present embodiment is composed of an arm member 26 and a stepping motor 27.

  The 2nd magnet 26a is arrange | positioned in the position which opposes the 1st magnet 25d through the display board 21 so that it may become a pair with the 1st magnet 25d. As a method of providing the second magnet 26a, the arm member 26 is formed of a resin material (for example, engineering plastic), and the second magnet 26a is provided separately from the arm member 26, and integrated by insert molding or outsert molding. Alternatively, a method of forming the arm member 26 with a plastic magnet and magnetizing a portion facing the first magnet 25d may be used.

  The 2nd yoke 26b is provided in the surface (non-facing surface) side which does not oppose the 1st magnet 25d of the 2nd magnet 26a. The second yoke 26b constitutes a magnetic circuit that suppresses leakage magnetic flux from the non-opposing surface of the second magnet 26a and improves magnetic efficiency.

  In the present embodiment, a first magnet 25d is provided on the pointer 24 arranged on the guide rail portion 23, and the second magnet 26a is disposed on the stepping motor 27 so as to face the first magnet 25d via the display board 21. By providing the arm member 26 fixed to the rotating shaft 27a, the first magnet 25d and the second magnet 26a are attracted to each other by magnetic force to guide the pointer 24 in conjunction with the rotational drive of the stepping motor 27. It can be moved along the rail portion 23. Therefore, even when the variable display portion is provided at the center of the display plate, the pointer does not become large and complicated in order to bypass the variable display portion as in the conventional method of directly fixing the pointer to the stepping motor. The pointer 24 can be moved with good responsiveness. Further, by providing the pointer 24 with the incident portion 24c that receives the light L from the illuminating means 22, the pointer 24 can be easily lit and displayed without complicating the configuration of the members.

  In addition, the holding portion 25 that holds the pointer 24 is provided with a restricting portion 25b that determines the disposition position with respect to the guide rail portion 23, and the guide rail portion 23 is provided with a guide portion 23b corresponding to the restricting portion 25b. It is possible to accurately indicate the indicator portion 2a by reducing the positional deviation from the portion 2a. Further, the holding portion 25 is always given a constant tension to the guide rail portion 23 by the attractive force of the first and second magnets 25d and 26a, and the pointer 24 slightly moves in the guide rail portion 23. It is possible to suppress seismicity and improve earthquake resistance.

  Although the first and second magnets 25d and 26a are permanent magnets, for example, the second magnet 26a may be an electromagnet. Moreover, as a variable display part, the display using an organic EL element other than the liquid crystal display part 21b may be sufficient. Further, although the stepping motor 27 is provided as the pointer driving means, it goes without saying that, for example, a cross coil type movement can be used instead of the stepping motor 27.

The front view which shows 1st embodiment of this invention. Sectional drawing which shows 1st embodiment same as the above. The figure which shows the guide rail part in 1st embodiment same as the above. The principal part expanded sectional view which shows 1st embodiment same as the above.

Explanation of symbols

6 Control means 21 Display board 21a Translucent substrate 21b Liquid crystal display part (variable display part)
21c Pointer illumination part 22 Illuminating means 22a Light source 23b Light guide member 23 Guide rail part 23a Recess 23b Guide part 23c Slit part 24 Pointer 24a Pointer base part 24b Instruction part 24c Incident part 25 Holding part 25a Placement part 25b Restriction part 25c Opening part 25d First magnet 25e First yoke 26 Arm member 26a Second magnet 26b Second yoke 27 Stepping motor 28 Circuit board

Claims (4)

An instrument device comprising: a display plate having a variable display; a pointer that moves on the front side of the display plate; and a pointer driving means that is provided on the rear surface side of the display plate and moves the pointer.
Illumination means provided on the rear side of the display plate;
A guide rail portion provided on the front side of the display plate and provided with the pointer;
Holding the pointer movably along the guide rail portion, a holding portion having an opening on the bottom surface;
An incident portion that is formed integrally with the pointer and is disposed in the opening to cause light from the illumination unit to enter and emit the pointer;
A first magnet provided on the pointer or the holding portion;
A second magnet provided on the pointer driving means so as to face the first magnet, and the pointer is interlocked with the rotational drive of the pointer driving means by the attractive force of the first and second magnets. The instrument device is characterized by being moved. The instrument device according to claim 1, wherein the guide rail portion has a slit portion at a location facing the incident portion. The instrument device according to claim 1, wherein the illumination unit includes a light source and a light guide member that guides light from the light source to the variable display unit and the incident unit, respectively. The instrument device according to claim 1, further comprising a cover body that covers the incident portion when viewed from a user's viewing direction.

Images