JP5141888B2 - Instrument device - Google Patents

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 plate (display plate) with a pointer. In such an instrument device, the pointer is directly fixed to a rotating 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.
DE43221146A1

  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-described 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 that is provided on the rear side of the display board and that is centered on a rotation axis. An instrument device having a pointer driving means for moving the indicator, wherein the indicator plate is provided on the display plate so as to surround the variable display portion or to be positioned in front of the variable display portion. Guide rail portion, a holding portion for holding the pointer movably along the guide rail portion, first and second pointer side magnets provided at both ends in the moving direction of the holding portion , and the pointer First and second drive-side magnets provided on the drive means so as to face the first and second pointer-side magnets, the first and second pointer-side magnets and the first and second The pointer is driven by the attractive force of the second drive magnet. Wherein the moving in conjunction with the rotation of the stage.

  And a restricting portion that is provided in the holding portion and that defines an arrangement position of the pointer with respect to the guide rail portion, and a guide portion that is provided in the guide rail portion and has a shape corresponding to the restricting portion. It is characterized by that.

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

  Hereinafter, embodiments 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 23. 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, a guide rail portion 22, a pointer 23, a holding portion 24, an arm member 25, and a stepping motor 26. Reference numeral 27 denotes a circuit board, and a stepping motor 26 is mounted on the circuit board 27.

  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 23, 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 guide rail portion 22 is provided on the display plate 21 so as to surround the liquid crystal display portion 21b or to be positioned on the liquid crystal display portion 21. For example, as shown in FIG. It is formed in a shape. Further, as shown in FIG. 4, the guide rail portion 22 has a concave portion 22 a that can accommodate the pointer 23, and has a concave guide portion 22 b in which a restricting portion of a holding portion 24 described later is disposed at the bottom thereof. The guide rail portion 22 is covered with a decorative ring 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 23 is made of a light-transmitting resin such as polycarbonate, and has one end portion disposed on the guide rail portion 22 and the other of the pointer base portion 23 a. And an instruction portion 23b that indicates the indicator portion 2a. The pointer 23 moves around the liquid crystal display portion 21b on the front side of the display board 21 along the guide rail portion 22 to indicate the indicator portion 2a, and displays predetermined information (vehicle speed in the present embodiment). is there.

  The holding portion 24 is made of, for example, an ABS resin light-shielding resin material, and is placed on the bottom portion of the mounting portion 24 a and the mounting portion 24 a that hold the pointer 23 movably along the guide rail portion 22 in the guide rail portion 22. And a regulating portion 24b to be formed. The restricting portion 24b is a protruding portion that protrudes downward from the placement portion 24a. The restricting portion 24b is disposed in the guide portion 22b provided in a concave shape in the guide rail portion 22 according to the shape of the restricting portion 24b, and the guide rail portion 22 of the pointer 23. The arrangement position with respect to is determined. It is also possible to set the angle formed between the guide rail portion 22 and the pointer 23 to a predetermined angle by adjusting the shapes of the restricting portion 24b and the guide portion 22b.

  Further, as shown in FIG. 5, the placement portion 24 a of the holding portion 24 has first and second pointer side magnets 24 c and 24 d and first and second pointers 24 a so as to be positioned around the pointer 23. Pointer side yokes 24e and 24f are provided. In FIG. 5, the display board 21 and the like are omitted for the sake of simplicity.

  The first and second pointer side magnets 24c and 24d are disposed so as to be positioned at both ends of the holding portion 24, respectively. The first and second pointer side magnets 24c, 24d attract each other with first and second drive side magnets 25a, 25b described later.

  The first and second pointer side yokes 24e and 24f are surfaces (non-facing surfaces) that do not face the first and second drive side magnets 25a and 25b of the first and second pointer side magnets 24c and 24d, respectively. Is provided. The first and second pointer side yokes 24e and 24f constitute a magnetic circuit that suppresses leakage magnetic flux from the non-opposing surface side of the first and second pointer side magnets 24c and 24d and improves magnetic efficiency. .

  As shown in FIG. 6, the arm member 25 has first and second drive side magnets 25a and 25b and first and second drive side yokes 25c and 25d on one end side, and the other end side is a stepping motor 26. It consists of a substantially Y shape fitted to the rotation shaft 26a. Note that the pointer driving means in the present embodiment is composed of the arm member 25 and the stepping motor 26.

  The first and second drive side magnets 25a and 25b are paired with the first and second pointer side magnets 24c and 24d, respectively, and the display plate 21 is attached to the first and second pointer side magnets 24c and 24d. It arrange | positions in the position which opposes. As a method of providing the first and second drive side magnets 25a and 25b, the arm member 25 is formed of a resin material (for example, engineering plastic), and the first and second drive side magnets are separate members from the arm member 25. 25a and 25b may be provided and formed integrally by insert molding or outsert molding. Also, the arm member 25 may be formed of a plastic magnet, and the first and second pointer side magnets 24c and 24d may be formed. A method of forming the opposite portion by magnetizing it may be used.

  The first and second drive side yokes 25c and 25d are on the surfaces (non-facing surfaces) of the first and second drive side magnets 25a and 25b that do not face the first and second pointer side magnets 24c and 24d. It is provided. The first and second drive side yokes 25c and 25d constitute a magnetic circuit that suppresses leakage magnetic flux from the non-facing surfaces of the first and second drive side magnets 25a and 25b and improves magnetic efficiency.

  In the present embodiment, first and second pointer side magnets 24 c and 24 d are provided at both ends of the holding portion 24 disposed on the guide rail portion 22, and the first and second pointer side magnets 24 c are provided via the display plate 21. , 24d are provided on the arm member 25 fixed to the rotating shaft 26a of the stepping motor 26 so that the first and second drive side magnets 25a, 25b are opposed to the first and second pointer side magnets. The pointer 23 can be moved along the guide rail portion 22 in conjunction with the rotational driving of the stepping motor 26 by attracting the 24c, 24d and the first and second drive side magnets 25a, 25b by magnetic force. Therefore, even when the variable display portion is provided in 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 23 can be moved with good responsiveness. In addition, first and second pointer side magnets 24c and 24d are provided at both ends of the holding portion 24, respectively, and attraction is performed at two points attracting the first and second drive side magnets 25a and 25b, respectively. Thereby, the holding force with respect to the moving direction of the pointer 23 can be increased, and when the pointer 23 is moved with good responsiveness, it is possible to suppress the displacement of the pointer 23.

  In addition, the holding portion 24 that holds the pointer 23 is provided with a restricting portion 24b that determines the disposition position with respect to the guide rail portion 22, and the guide rail portion 22 is provided with a guide portion 22b corresponding to the restricting portion 24b, whereby the indicator 23 and the index are provided. It is possible to indicate the index part 2a with high accuracy by reducing the positional deviation from the part 2a. Further, a constant tension is always applied to the guide rail portion 22 in the holding portion 24 by the attractive force of the first and second pointer side magnets 24c and 24d and the first and second drive side magnets 25a and 25b. Therefore, it is possible to suppress the fine movement of the pointer 23 in the guide rail portion 22 and improve the earthquake resistance.

  The pointer 23 moves around the liquid crystal display unit 21b. However, even if the pointer 23 and the liquid crystal display unit 21b partially overlap, the pointer 23 moves in front of the liquid crystal display unit 21b. good. In that case, the guide rail part 22 is provided so that it may be located in front of the liquid crystal display part 21b. The first and second magnets 24c and 25a are permanent magnets, but the first and second drive-side magnets 25a and 25b may be electromagnets, for example. 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 26 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 26.

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

Explanation of symbols

21 Display board 21a Translucent substrate 21b Liquid crystal display part (variable display part)
22 Guide rail portion 22a Recessed portion 22b Guide portion 23 Pointer 23a Pointer base portion 23b Instruction portion 24 Holding portion 24a Placement portion 24b Restriction portion 24c First pointer side magnet 24d Second pointer side magnet 24e First pointer side yoke 24f First Second pointer side yoke 25 Arm member 25a First drive side magnet 25b Second drive side magnet 25c First drive side yoke 25d Second drive side yoke 26 Stepping motor 27 Circuit board

Claims (2)

A display plate having a variable display portion, a pointer that moves on the front side of the display plate, and a pointer driving means that is provided on the rear side of the display plate and moves the pointer around a rotation axis. An instrument device comprising:
A guide rail portion provided on the display plate so as to surround the variable display portion or to be positioned in front of the variable display portion;
A holding part for holding the pointer movably along the guide rail part;
First and second pointer side magnets provided at both ends of the holding portion in the moving direction ;
A first driving side magnet and a second driving side magnet provided on the pointer driving means so as to face the first and second pointer side magnets, the first and second pointer side magnets and the first The instrument device is characterized in that the pointer is moved in conjunction with the rotational drive of the pointer drive means by the attractive force of the second drive side magnet. A restriction portion that is provided in the holding portion and defines a position of the pointer relative to the guide rail portion; and a guide portion that is provided in the guide rail portion and has a shape corresponding to the restriction portion. The instrument device according to claim 1, wherein

Images