JP2010048687A - Instrument device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an instrument device excellent in responsiveness and vibration resistance without complicating a shape of a member, the instrument device being equipped with a pointer movable along a front face side of a display panel. <P>SOLUTION: The instrument device includes a guide rail part 22 which is provided on the display panel 21 and includes a pointer 23, a holding part 24 for holding the pointer 23 movably along the guide rail part 22, first and second pointer side magnets 24c, 24d provided on the holding part 24, and first and second driving side magnets 25a, 25b respectively provided on pointer driving means 25, 26 so as to face the first and second pointer side magnets 24c, 24d. A direction of fluxes of a first magnetic circuit constituted by the first pointer side magnet 24c and the first driving side magnet 25a is opposite to a direction of fluxes of a second magnetic circuit constituted by the second pointer side magnet 24d and the second driving side magnet 25b. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an instrument device including a pointer that moves on the front side of a 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. Such an instrument device directly fixes the pointer on a rotating shaft of a pointer driving means such as a stepping motor, and rotates the pointer in conjunction with the rotational driving of the pointer driving means to indicate the indicator portion. is there.

  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 2003-014508 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 including a pointer that moves on the front side of a display board, and has excellent responsiveness and vibration resistance without complicating the shape of members. An object is to provide an apparatus.

  In order to solve the above problems, the present invention is an instrument device comprising a pointer that moves on the front side of a display board, and a pointer driving means that is provided on the rear side of the display board and moves the pointer. A guide rail portion provided on the display plate, on which the pointer is disposed, a holding portion that holds the pointer movably along the guide rail portion, and a first and a second provided on the holding portion. The first pointer side magnet, and the first and second driving side magnets provided on the pointer driving means so as to face the first and second pointer side magnets, Magnetic flux direction in a first magnetic circuit configured with the first drive side magnet, and magnetic flux direction in a second magnetic circuit configured with the second pointer side magnet and the second drive side magnet And the first and second pointer side magnets. Fine the first, and wherein the moving in conjunction with the pointer to the rotation drive of the pointer drive means by the suction force of the second driving-side magnet.

  Further, a yoke for connecting the first and second drive-side magnets is disposed on the non-opposing surface side of the first and second drive-side magnets with respect to the first and second pointer-side magnets. It is characterized by that.

  Also, a yoke is provided on the surface of the first and second pointer side magnets that is not opposed to the first and second drive side magnets and connects the first and second pointer side magnets. It is characterized by.

  The first and second pointer side magnets are provided at both ends of the holding portion.

  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.

  Further, the display board has a variable display portion, and the guide rail portion is provided so as to surround the variable display portion or to be positioned in front of the variable display portion.

  The present invention relates to an instrument device including a pointer that moves on the front side of a display panel, and has excellent response and vibration resistance without complicating the shape of the member.

  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 with the indicator portions 3a, 4a, 5a on a substrate made of a translucent resin (for example, polycarbonate), and the light shielding portions are excluded except for the character portions 3b, 4b, 5b. Print-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 made of, for example, a soft magnetic material such as permalloy, soft iron, or pure iron. The first and second pointer side magnets 24c and 24d are driven first and second, respectively. It is provided on the surface (non-facing surface) side that does not face the side magnets 25a and 25b. 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 25 a and 25 b and a drive side yoke 25 c on one end side, and the other end side is fitted with the rotating shaft 26 a of the stepping motor 26. It is made of a substantially T-shape. 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.

  FIG. 7 is a diagram showing the magnetic poles of the first and second pointer side magnets 24c and 24d and the first and second drive side magnets 25a and 25b. In the present embodiment, the first pointer-side magnet 24c and the first drive-side magnet 25a constitute a first magnetic circuit for fixing the pointer 23, and the second pointer-side magnet 24d and the second drive-side magnet are fixed. A second magnetic circuit for fixing the pointer 23 is constituted by the side magnet 25b. Further, the first and second pointer side magnets 24c and 24d are magnetized with different magnetic poles on the side facing the first and second drive side magnets 25a and 25b, and the first and second magnets are accordingly changed. The drive side magnets 25a and 25b are magnetized with different magnetic poles on the side facing the first and second pointer side magnets 24c and 24d, so that the magnetic flux direction D1 of the first magnetic circuit and the first The direction of the magnetic flux D2 of the second magnetic circuit is opposite. As shown in FIG. 8A, the magnetic flux direction D1 of the first magnetic circuit and the magnetic flux direction D2 of the second magnetic circuit are the same direction, that is, the first and second pointer side magnets 24c, 24d is magnetized with the same magnetic poles on the side facing the first and second drive-side magnets 25a and 25b, and the first and second drive-side magnets 25a and 25b are first and second magnets accordingly. When the same magnetic pole is magnetized on the surface facing the two pointer side magnets 24c and 24d, there are a plurality of magnetic force stable points. For example, when an impact is applied to the instrument device, FIG. As shown in b), the pointer 23 is fixed at a position different from the original fixed position (the position where the first pointer side magnet 24c and the second driving side magnet 25b face each other in FIG. 8B), There is a risk that the pointer 23 may be misaligned. There is a problem in that that. On the other hand, by setting the magnetic flux direction D1 of the first magnetic circuit and the magnetic flux direction D2 of the second magnetic circuit to be opposite to each other as described above, the magnetic force stable point is set to the first pointer side magnet 24c. And the first drive side magnet 25a are opposed to each other, and the second pointer side magnet 24d and the second drive side magnet 25b are opposed to each other. Even in this case, the pointer 23 can be stabilized at a desired position.

  The drive side yoke 25c is made of a soft magnetic material such as permalloy, soft iron, or pure iron, for example, and does not face the first and second pointer side magnets 24c, 24d of the first and second drive side magnets 25a, 25b. It is provided on the (non-opposing surface) side and connects the magnets 25a and 25b to each other. A so-called closed circuit is configured by the drive side yoke 25c, and it is possible to configure a magnetic circuit that suppresses leakage magnetic flux from the non-opposing surfaces of the first and second drive side magnets 25a and 25b and improves magnetic efficiency. Become.

  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 magnetic flux direction D1 of the first magnetic circuit composed of the first pointer side magnet 24c and the first driving side magnet 25a, the second pointer side magnet 24d and the second driving side magnet 25b, By making the magnetic flux direction D2 of the second magnetic circuit constituted by the opposite directions, the magnetic force stable point can be set to one point, and the pointer 23 can be stabilized at a desired position. Become.

  In addition, the first and second drive side magnets 25a and 25b are connected to the first and second drive side magnets 25a and 25b on the non-facing surface side of the first and second pointer side magnets 24c and 24d. By disposing the yoke 25c, it is possible to configure a magnetic circuit that suppresses leakage magnetic flux from the non-facing surface and improves magnetic efficiency. The first and second pointer side magnets 24c and 24d are connected to the first and second pointer side magnets 24c and 24d on the non-opposing surface side of the first and second pointer side magnets 25a and 25b. A magnet may be provided, and similarly the magnetic efficiency can be improved by a closed circuit.

  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. The figure explaining the magnet in embodiment same as the above. The figure explaining the comparative example of the magnet 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 (6)

An instrument device having a pointer for moving the front side of the display plate, and a pointer driving means provided on the rear side of the display plate for moving the pointer,
A guide rail portion provided on the display plate and provided with the pointer;
A holding portion that holds the pointer movably along the guide rail portion;
First and second pointer side magnets provided in the holding portion;
First and second drive side magnets provided on the pointer drive means so as to face the first and second pointer side magnets,
The magnetic flux direction in the first magnetic circuit composed of the first pointer side magnet and the first drive side magnet, and the second pointer side magnet and the second drive side magnet. The direction of magnetic flux in the second magnetic circuit is the opposite direction,
An instrument device, wherein the pointer is moved in conjunction with the rotational driving of the pointer driving means by the attractive force of the first and second pointer side magnets and the first and second driving side magnets. A yoke for connecting the first and second drive side magnets is disposed on a surface of the first and second drive side magnets that is not opposed to the first and second pointer side magnets. The instrument device according to claim 1, wherein A yoke for connecting the first and second pointer side magnets is provided on a surface of the first and second pointer side magnets that is not opposed to the first and second drive side magnets. The instrument device according to claim 1. The instrument device according to claim 1, wherein the first and second pointer side magnets are provided at both ends of the holding portion. 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 The said display board has a variable display part, The said guide rail part is provided so that the circumference | surroundings of the said variable display part may be enclosed or located in front of the said variable display part. Instrument equipment.

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