JP2006284460A - Driving mechanism for instrument, and instrument having it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a driving mechanism for an instrument for movably attaching a displaying means to an instrument case section for storing the displaying means. <P>SOLUTION: The driving mechanism 20 for the instrument movably attaches the displaying means 10 to instrument case sections 51, 52 and 53 for storing the displaying means 10. The driving mechanism 20 comprises a first fixed section 15 to be fixed to the displaying means 10, a second fixed section 26 to be fixed to the instrument case sections 51, 52 and 53, a driving means 23 to be fixed to one of them, and transmitting means 22 and 25. The transmitting means 22 and 25 transmit the power of the driving means 23 and 24 to the other of the first fixed section 15 and second fixed section 26. Thus, the driving mechanism 20 for the instrument for movably attaching the displaying means 10 to the instrument case sections 51, 52 and 53 can be achieved. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an instrument drive mechanism for movably attaching a display means to an instrument housing that houses display means for displaying information, and an instrument equipped with the same.

Conventionally, various proposals have been made in order to improve the visibility of an instrument. For example, a display means for moving a vehicle instrument in the front-rear direction of the vehicle in conjunction with a tilting operation of a steering handle has been proposed. (See Patent Document 1).
Japanese Utility Model Publication No. 1-161117

  However, in Japanese Patent Laid-Open No. 2004-228688, the display unit is manually operated by simply moving the display unit in the front-rear direction of the vehicle in conjunction with the tilting operation of the steering handle, and the disclosure regarding the drive mechanism is not sufficient.

  In this type of instrument, the requirement to move the display means relative to the instrument housing is a common need not only for vehicular instruments but also for ships and others.

  The present invention has been made in view of the above points, and provides an instrument drive mechanism for movably attaching a display means to an instrument housing that houses display means for displaying information, and an instrument including the instrument drive mechanism. The purpose is to do.

  In order to achieve the above object, the present invention employs the following technical means.

  The instrument drive mechanism according to claim 1, wherein the display means for displaying information is movably attached to the instrument housing that accommodates the display means, and is fixed to the display means. A second fixing unit fixed to the instrument case unit, a driving unit fixed to one of the first fixing unit and the second fixing unit, and moving the first fixing unit relative to the second fixing unit; It is set as the structure provided with the transmission means provided with the transmission part which transmits the motive power of a drive means to the other of a 1st fixing | fixed part and a 2nd fixing | fixed part.

  In this configuration, the driving means for moving the first fixing portion relative to the second fixing portion is fixed to one of the first fixing portion and the second fixing portion, and the power of the driving means is fixed to the first fixing portion and the second fixing portion. A transmission means for transmitting to the other of the parts is provided. Thereby, the instrument drive mechanism which attaches a display means with respect to an instrument housing | casing part so that a movement is possible is realizable.

  The instrument drive mechanism according to claim 2 is configured such that the transmission means arranges the transmission part in one of the vicinity of the first fixing part and the vicinity of the second fixing part.

  In this configuration, the transmission unit that requires a wide area to move the first fixing unit relative to the second fixing unit is arranged in one of the vicinity of the first fixing unit and the vicinity of the second fixing unit. Accordingly, it is easy to design the transmission unit so as not to interfere with instrument parts, and an instrument driving mechanism for easily attaching the display unit to the instrument housing part can be easily realized.

  The instrument driving mechanism according to claim 3, wherein the driving means includes a rotating part that rotates, and the transmission part moves the rotating part of the rotating part to slide the first fixing part with respect to the second fixing part. It is set as the structure converted into.

  In this configuration, the driving unit includes a rotating rotary unit, and the transmission unit converts the rotary motion of the rotary unit into a motion of sliding the first fixed unit with respect to the second fixed unit. Thereby, a general drive means provided with the rotating rotation part can be used, and the above-mentioned effect can be obtained more easily.

  The instrument drive mechanism according to claim 4, wherein the transmission means includes a rotation gear fixed to the rotation part, and a slide gear fixed to the other and having teeth that mesh with the teeth of the rotation gear. The rotation gear teeth and the slide gear teeth are in mesh with each other.

  In this configuration, the transmission means includes a rotating gear fixed to the rotating portion, and a slide gear having teeth fixed to the other and meshing with the teeth of the rotating gear. Thereby, the above-described effect can be obtained with a simpler configuration.

  The instrument drive mechanism according to claim 5, wherein the transmission means includes a first screw part included in the rotating part, and a second screw part fixed to the other and meshing with the first screw part, and the transmission part includes: The first screw portion and the second screw portion are configured to engage with each other.

  In this configuration, the transmission means includes a first screw portion included in the rotating portion, and a second screw portion fixed to the other and meshing with the first screw portion. Thereby, the above-described effect can be obtained with a simpler configuration.

  The instrument drive mechanism according to claim 6, wherein the drive means is a coil that generates a magnetic flux by passing an electric current, and a magnetic force that is movably disposed with respect to the coil and that receives the magnetic flux of the coil and is a motive power. And a transmission means is provided with a mover fixed to the permanent magnet and the other and movably disposed with respect to the coil. It is set as the structure comprised from the part fixed.

  In this configuration, the driving means includes a coil and a permanent magnet arranged to be movable with respect to the coil, and the transmission means is fixed to the permanent magnet and the other and is arranged to be movable with respect to the coil. Equipped with a movable element. Thereby, the drive means of a simple structure provided with a coil and a permanent magnet can be used, and the above-mentioned effect can be acquired more easily.

  A meter according to a seventh aspect includes the instrument drive mechanism according to any one of the first to sixth aspects.

  In this configuration, since the instrument includes the instrument drive mechanism according to any one of claims 1 to 6, the above-described effects can be obtained in the instrument.

  Hereinafter, the case where the instrument drive mechanism according to the present invention is applied to a combination meter 1 mounted on an automobile will be described with reference to the drawings.

(Constitution)
FIG. 1 is a front view of a combination meter 1 that is an instrument to which an instrument drive mechanism 20 according to an embodiment of the present invention is applied.

  2 is a cross-sectional view taken along line II-II in FIG.

  3 is a cross-sectional view taken along line III-III in FIG.

  4 is a cross-sectional view taken along line IV-IV in FIG.

  FIG. 5 is a front view of the combination meter 1 shown in FIG. 1 showing a state where the vehicle speed meter 10 as the display means and the tachometer 30 as the display means are farthest apart.

  FIG. 6 is a front view of the combination meter 1 shown in FIG. 1 showing a state in which the vehicle speed meter 10 and the tachometer 30 are closest to each other.

  FIG. 7 is a circuit configuration diagram illustrating an electrical circuit configuration of the combination meter 1 shown in FIG.

  The combination meter 1 that is a display device is arranged in front of the driver's seat of the automobile and displays various vehicle information related to the automobile. As shown in FIG. 1, the combination meter 1 according to the present embodiment includes a speedometer 10 that is a display means on the left side indicated by an arrow in the figure, a tachometer 30 that is a display means on the right side indicated by an arrow in the figure, A liquid crystal display 40 is provided between them.

  The speedometer 10 displays the traveling speed of the automobile, the tachometer 30 displays the engine speed, and the liquid crystal display 40 displays navigation information, road traffic information, and the like.

  The speedometer 10 and the tachometer 30 include dials 11 and 31, pointers 12 and 32, and movable casings 15 and 35, respectively. The dials 11 and 31 are fixed to the movable casings 15 and 35, respectively, and the hands 12 and 32 are respectively along the front surfaces of the dials 11 and 31 (the upper surface indicated by the arrow in FIG. 2). Rotate.

  The movable housing 15 is attached to the design plate 51 constituting a part of the instrument housing portion so as to be movable in the direction of arrow A in FIG. It is movably attached in the direction of. Scales, letters, etc. are printed or hot stamped on the front surface (upper surface indicated by the arrow in FIG. 2) or back surface (lower surface indicated by the arrow in FIG. 2) of each dial 11, 31. It is formed by.

  Hereinafter, the configuration of the speedometer 10 will be described in detail. As shown in FIG. 2, the dial 11 is provided with a through hole through which a shaft 13a of a movement 13 described later is inserted, and a print is provided behind the dial 2 (lower side indicated by an arrow in FIG. 2). A substrate 14 is disposed. The printed circuit board 14 constitutes an electric circuit unit of the speedometer 10 and is fixed to the movable housing 15. The movement 13 is mounted on the printed circuit board 14.

  The movement 13 is composed of, for example, a cross coil actuator, a stepping motor, or the like, and rotates the shaft 13a by an angle corresponding to an electric signal from the outside (in this embodiment, a signal related to the vehicle speed). The shaft 13a extends through the through hole of the dial 2 to the surface side (the upper side indicated by the arrow in FIG. 2), and the pointer 12 is fixed to the tip thereof.

  The movable housing 15 is moved in the vertical direction of the paper surface of FIG. 3 (FIGS. 1 and 4) with respect to the design plate 51 constituting a part of the instrument housing portion by the instrument drive mechanism 20 shown in FIGS. 4 in the direction of arrow A in FIG. 2, the left-right direction indicated by the arrow in FIG. 2).

  The instrument drive mechanism 20 includes a part of the movable casing 15, a mounting member 21, a slide gear 22, a movement 23, a shaft 24 that is a rotating part, a rotating gear 25, and a part of the printed circuit board 26. Consists of The driving means is composed of a movement 23 and a shaft 24.

  The movable casing 15, the attachment member 21, and the design plate 51 are formed of a resin material, and the movable casing 15 is provided with a slide hole 15a and a gear hole 15b. As shown in FIGS. 2 to 4, the attachment portion 21 b of the attachment member 21 is fixed to the design plate 51 with an adhesive or the like through the slide hole 15 a at the position of the attachment hole.

  Thus, the bottom of the movable casing 15 is sandwiched between the guide portion 21 a of the attachment member 21 and the bottom of the design plate 51 so that the movable casing 15 can slide with respect to the design plate 51. That is, the movable casing 15 is constrained with respect to the mounting member 21 and the design plate 51 in the left-right direction indicated by the arrows in FIGS. 3 and 4 and the left-right direction indicated by the arrows in FIG. 2 (arrow A in FIG. 4). (Moving in the direction of).

  3 and 4, a part of the movable casing 15 surrounded by a broken line indicating the instrument drive mechanism 20 corresponds to the first fixed portion.

  The movement 23 is the same as the movement 13 except that the movement 23 is larger than the movement 13 (high torque compatible type), and rotates the shaft 24 around its longitudinal direction as a rotation axis. The printed circuit board 26 is fixed to a case 52 that constitutes a part of the instrument housing, and the movement 23 is mounted on the printed circuit board 26.

  In FIG. 3, a part of the printed circuit board 26 surrounded by a broken line indicating the instrument drive mechanism 20 corresponds to the second fixing portion.

  The shaft 24 extends to the surface side (the upper side indicated by the arrow in FIG. 2) through the through hole of the design plate 51, and the rotating gear 25 is fixed to the tip thereof. A slide gear 22 is formed in the gear hole 15b of the movable casing 15, and the rotary gear 25 and the slide gear 22 are provided with teeth (not shown) and are arranged so as to mesh with each other as shown in FIGS. . The transmission means includes a slide gear 22 and a rotation gear 25.

  In FIG. 2, the flexible wiring 14 a having flexibility connects the printed circuit board 14 and the printed circuit board 26 through the slide hole 15 a of the movable housing 15 and the through hole of the design plate 51.

  A control device 44 (FIG. 7) configured with a microcomputer or the like is mounted on the printed circuit board 26. The control device 54 controls the movement 13, the movement 23, the liquid crystal panel 41, the light emitting diode 42, and the like according to an external electric signal input.

  Since the configuration of the tachometer 30 is the same as that of the speedometer 10, the description thereof is omitted.

  The liquid crystal display 40 is disposed behind the design plate 51 (lower side indicated by the arrow in FIG. 2) and behind the liquid crystal panel 41 (lower side indicated by the arrow in FIG. 2). And a light diffusion plate (not shown) disposed between them. The light emitting diode 42 illuminates and transmits the liquid crystal panel 41, and the light diffusion plate guides the light of the light emitting diode 42 uniformly on the back surface of the liquid crystal panel 41 (the lower surface indicated by the arrow in FIG. 2). .

  The liquid crystal panel 41 is a TFT (Thin Film Transistor) type liquid crystal panel, and is arranged so that its display is viewed from the viewing side (the upper side indicated by the arrow in FIG. 2) through the opening 51 b provided in the design plate 51. Established. That is, the liquid crystal panel 41 is disposed behind the movable casing 15 of the speedometer 10 and the movable casing 35 of the tachometer 30 (on the lower side indicated by the arrows in FIGS. 2 and 3).

  In FIG. 5, the liquid crystal panel 41 passes through the opening 51 b of the design plate 51, and substantially displays the entire area as a display area 41 a to display map information. The mark 41b indicates the position of the vehicle in the map information displayed in the display area 41a. At this time, the speedometer 10 and the tachometer 30 are configured to move in the directions indicated by the arrows A1 and B1 in the drawing, respectively, and to be controlled to be farthest from each other.

  Further, in FIG. 6, the liquid crystal panel 31 displays a gear shift information (gear position of the transmission) with a partial area as a display area 41a through the opening 51b of the design plate 51. The mark 41b indicates a position where the transmission gear is switched in the display area 41a.

  In FIG. 6, a mark 41b indicates that the transmission gear is switched to the parking position. In this case, for example, the mark 41b is displayed with a black character “P” with a red background, and the other characters “R, N, D, 2, L” are displayed with a black background with a white background. At this time, the speedometer 10 and the tachometer 30 are configured to move in directions indicated by arrows A2 and B2 in the drawing, respectively, and to be controlled to be closest to each other.

  The speedometer 10 and the tachometer 30 are moved in the direction of the arrow A and the direction of the arrow B in the figure, respectively, but are intended to be moved along the outer shape of the design plate 51. It is.

  An electric circuit configuration of the combination meter 1 that is an instrument to which the instrument drive mechanism 20 according to the embodiment of the present invention described above is applied will be described with reference to FIG.

  Electric power is always supplied from the battery 59 to the control device 54, and an ignition switch 58 is connected so as to be able to detect its operation position (off position, on position), a vehicle speed sensor 55 for detecting the vehicle speed of the vehicle, A rotation sensor 56 that detects the engine speed, a gear position sensor 57 that detects the gear position of the transmission, a sensor, a switch, and the like (not shown) are connected so that these signals can be input.

  In addition, devices driven by the control device 54 in accordance with detection signals from these various sensors 55, 56, and 57 are connected. That is, the movements 13 and 23, the liquid crystal panel 41, the light emitting diode 42, and the like are connected to the control device 54.

  FIG. 1 shows a state in which the speedometer 10 and the tachometer 30 are in an intermediate position between FIG. 5 and FIG. At this time, the ignition switch 58 is turned on, that is, the ignition switch 58 is turned off, and the liquid crystal panel 41 is in a stopped state.

  The speedometer 10, the tachometer 30, and the liquid crystal display 40 described above are housed and held in an instrument housing unit that includes a design plate 51, a case 52, and a transparent cover 53, as shown in FIGS. 2 and 3. Has been.

(Operation)
When the ignition switch 58 is turned off, the liquid crystal panel 41 is in a display stopped state, and the speedometer 10 and the tachometer 30 are intermediate positions shown in FIGS. 5 and 6, respectively. Is in the state shown.

  When the ignition switch 58 is turned on by the driver, the control device 54 detects it and starts operation, turns on the light emitting diode 42, and causes the liquid crystal panel 41 to display the display shown in FIG. In conjunction with this, that is, the control device 54 receives the ON signal of the ignition switch 58 that is an instruction signal, and causes the speedometer 10 and the tachometer 30 to move in the directions indicated by the arrows A2 and B2 in the figure, respectively. Move to the direction and control them to be closest to each other.

  Specifically, in FIGS. 2 and 3, the movement 23 rotates the shaft 24, and the rotating gear 25 fixed to the shaft 24 rotates. As a result, the slide gear 22 that meshes with the rotation gear 25 slides in the left-right direction in FIG. 2 with respect to the rotation gear 25, and the movable housing 15 slides in the left-right direction in FIG. 2 with respect to the design plate 51. As a result, in FIG. 6, the speedometer 10 moves in the direction of the arrow A2, and similarly moves in the direction of the tachometer 30 arrow B2.

  Since the display of the gear position of this transmission is much smaller than the opening 51b of the design plate 51, a dead space occurs. However, since the speedometer 10 and the tachometer 30 are controlled to be closest to each other, the dead space generated in the opening 41b is covered by the speedometer 10 and the tachometer 30.

  Thereby, it is possible to prevent the display of the liquid crystal panel 41 from appearing to be extended with respect to the speedometer 10 and the tachometer 30 on both sides, and the appearance of the combination meter 1 can be improved.

  When the vehicle starts running and the gear of the transmission is switched to one of the driving positions “D, 2, L” and a predetermined time (for example, 10 seconds) has elapsed, the control device 54 sends a gear as an instruction signal. By receiving a signal from the position sensor 57, it is detected. Upon detecting this, the control device 54 automatically switches the display on the liquid crystal panel 31 from the display shown in FIG. 6 to the display shown in FIG. In conjunction with this, the speedometer 10 and the tachometer 30 are moved in the direction of the arrow A1 and the direction of the arrow B1 in the drawing, respectively, and are controlled to be in the state farthest from each other.

  Since the display of this map information is substantially equal to the opening 51b of the design board 51, no dead space is generated. However, since the speedometer 10 and the tachometer 30 are controlled so as to be farthest from each other, the display of map information substantially equal to the opening 51b is not covered by the speedometer 10 and the tachometer 30.

  When the driver switches the gear of the transmission between the driving positions “D, 2, L” while the vehicle is running, the control device 54 receives the signal from the gear position sensor 57 to change it. Then, the display on the liquid crystal panel 41 is switched from the display shown in FIG. 5 to the display shown in FIG. 6 (however, the mark 31b is any one of “D, 2, L”). In conjunction with this, the speedometer 10 and the tachometer 30 are moved in the direction of the arrow A2 and the direction of the arrow B2 in the drawing, respectively, and are controlled to be closest to each other.

  When the car reaches the destination and parks it, the driver switches the transmission gear to the parking position “P”. At this time, the control device 54 receives the signal from the gear position sensor 57 to detect it, and switches the display on the liquid crystal panel 41 from the display shown in FIG. 5 to the display shown in FIG. In conjunction with this, the speedometer 10 and the tachometer 30 are moved in the direction of the arrow A2 and the direction of the arrow B2 in the drawing, respectively, and are controlled to be closest to each other.

  Thereafter, the ignition switch 58 is turned off, and the control device 54 detects the ignition switch 58 off signal, which is an instruction signal, detects it, stops the display on the liquid crystal panel 41, and the speedometer 10 and the tachometer 30. Are moved to the state shown in FIG.

  As described above, when the display on the liquid crystal display 40 is small, the non-display area (dead space) is controlled to be shielded by the speedometer 10 and the tachometer 30, and when the display on the liquid crystal display 40 is large. The display is controlled so as not to be shielded by the speedometer 10 and the tachometer 30.

  For this reason, when the display of the liquid crystal display 40 is small, the display of the liquid crystal display 40 does not appear to be extended with respect to the speedometer 10 and the tachometer 30 on both sides. On the other hand, when the display of the liquid crystal display 40 is large, this display is not obstructed by the speedometer 10 and the tachometer 30 on both sides. In other words, the liquid crystal display 40 can perform various sizes of display without improving the appearance, and improving the appearance.

  In addition, every time the size of the display area of the liquid crystal display 40 is changed, the speedometer 10 and the tachometer 30 on both sides are moved in conjunction with each other. It can also give surprise and fun to the person.

  The instrument drive mechanism 20 according to the embodiment of the present invention described above includes a part of the movable casings 15 and 35 that are first fixed parts fixed to the speedometer 10 and the tachometer 30 that are display means, A part of the printed circuit board 26 which is a second fixed part fixed to the instrument housing part composed of the design plate 51, the case 52 and the transparent cover 53, and the printed circuit board 26 (instrument housing part) are fixed. A movement 23 that is a driving means for moving the movable casing 15 (speedometer 10) with respect to the printed circuit board 26 (instrument casing section) and a driving means for moving the movable casing 35 (rotometer 30) are provided. .

  Furthermore, a shaft 24 that is a rotating part rotated by the movement 23, and a slide that converts the rotational movement of the shaft 24 into a movement that linearly moves the movable casing 15 with respect to the printed circuit board 26 (instrument casing). The transmission means comprised from the gear 22 and the rotation gear 25 is provided.

  Thereby, it is possible to realize an instrument drive mechanism that movably attaches the display means to the instrument housing portion that houses the display means for displaying information, and is not limited to the above example, and this is applied to various needs. be able to.

  Note that the transmission portion where the teeth of the rotary gear 25 and the teeth of the slide gear 22 mesh with each other is located near the slide surface on which the movable casing 15 in the vicinity of the first fixed portion slides on the design plate 51, that is, the movable casing. Located at the bottom of the body 15.

  Thereby, since the through-hole 51a of the design board 51 can be comprised small, since the through-hole 51a is not visually recognized by the movement position of the movable housing | casing 15, the design of the instrument drive mechanism 20 becomes easy. In addition, a design study for preventing the moving slide gear 22 from interfering with the liquid crystal panel 41 or the like becomes unnecessary.

In the above-described embodiment, the speedometer 10 and the tachometer 30 are linearly moved in the directions indicated by arrows A and B in FIG. 1, respectively, but can be moved in an arc shape. In this case, the slide hole 15a, the guide portion 21a of the attachment member 21, and the slide gear 22 are formed in an arc shape in FIG.
(Other variations)
FIG. 8 is a cross-sectional view illustrating a first modification of the instrument drive mechanism 20 shown in FIG.

  9 is a cross-sectional view taken along line IX-IX in FIG.

  In the first modification, unlike the above-described embodiment (FIG. 3), the shaft 24 extends from the movement 23 in the right direction indicated by the arrow in FIG. 9, and the rotating gear 25 is fixed to the tip thereof. The rotation gear 25 is disposed so that the rotation axis thereof faces in the left-right direction indicated by the arrow in FIG. 9, and the slide gear 22 is formed on the bottom surface of the movable housing 15 so as to mesh with the rotation gear 25. For this reason, the gear hole 15 b is not formed in the movable casing 15.

  A portion where the teeth of the rotary gear 25 and the teeth of the slide gear 22 mesh with each other is disposed on a slide surface on which the movable casing 15 slides on the design plate 51.

  With the above configuration, even in this modification, the effects of the above-described embodiment can be obtained.

  FIG. 10 is a cross-sectional view illustrating a second modification of the instrument drive mechanism 20 shown in FIG.

  11 is a cross-sectional view taken along line XI-XI in FIG.

  In the second modified example, as shown in FIGS. 10 and 11, unlike the above-described embodiment (FIG. 3) and modified example (FIG. 8), a male threaded portion 25a that is a first threaded portion on the outer surface of the shaft 24. Is formed instead of the rotation gear 25, and the female screw portion 22 a as the second screw portion is formed on the attachment member 21 instead of the slide gear 22.

  The attachment portion 21b of the attachment member 21 is fixed to the movable housing 15 with an adhesive or the like at the attachment hole position. As a result, the bottom of the design plate 51 is sandwiched between the guide portion 21 a of the attachment member 21 and the movable housing 15 so that the movable housing 15 can slide relative to the design plate 51. That is, the movable casing 15 and the attachment member 21 are attached to the design plate 51 so as to be restrained in the left-right direction indicated by the arrow in FIG. 11 and movable in the left-right direction indicated by the arrow in FIG.

  As shown in FIG. 10, both ends of the shaft 24 are rotatably supported by a shaft support member 24 a, and the left end of the shaft 24 (the left end indicated by the arrow in FIG. 1) is rotated by the movement 23. Configured as follows. Further, the shaft 24 is configured such that the male screw portion 25 a penetrates the female screw portion 22 a of the mounting member 21 while meshing with the female screw portion 22 a.

  Thereby, the movement 23 rotates the shaft 24, so that the male screw portion 25 a of the shaft 24 rotates while meshing with the female screw portion 22 a of the attachment member 21. As a result, the female screw portion 22 a of the attachment member 21 slides on the shaft 24 in the left-right direction in FIG. 10, and the movable housing 15 moves on the design plate 51.

  With the above configuration, even in this modification, the effects of the above-described embodiments and modifications can be obtained.

  A portion where the male screw portion 25a of the shaft 24 and the female screw portion 22a of the mounting member 21 mesh with each other is below the slide surface on which the movable housing 15 slides on the design plate 51 (upper side indicated by the arrow in FIG. 1). To place. For this reason, it is necessary to form the slide hole 51c in which the attachment member 21 can slide instead of the through-hole 51a.

  However, since the dimension of the mounting member 21 in the sliding direction (the left-right direction indicated by the arrow in FIG. 10) is small, it is possible to facilitate design studies to prevent this from interfering with the liquid crystal panel 41 and the like.

  FIG. 12 is a cross-sectional view illustrating a third modification of the instrument drive mechanism 20 shown in FIG.

  In the third modified example, as shown in FIG. 12, unlike the above-described embodiment (FIG. 3) and modified examples (FIGS. 8 and 10), the movement using the electromagnetic solenoid 23a and the permanent magnet 23b, which are coils, as driving means. 23 instead of 23.

  The rod-shaped movable element 21c is fixed to the attachment member 21, and the permanent magnet 23b is fixed to the left end of the movable element 21c (the left end indicated by the arrow in the figure). The control device 54 controls the magnetic force acting on the permanent magnet 23b from the electromagnetic solenoid 23a by controlling the current flowing through the electromagnetic solenoid 23a (both its flow direction and flow amount). Further, both ends of the coil spring 23c are fixed to the electromagnetic solenoid 23a and the permanent magnet 23b, respectively.

  That is, by controlling the magnetic force acting on the permanent magnet 23b from the electromagnetic solenoid 23a, the coil spring 23c is deformed so as to be balanced with the magnetic force, whereby the movable casing 15 moves on the design plate 51.

  With the above configuration, even in this modification, the effects of the above-described embodiments and modifications can be obtained.

  FIG. 13 is a cross-sectional view illustrating a fourth modification of the instrument drive mechanism 20 shown in FIG.

  In the fourth modified example, as shown in FIG. 13, unlike the above-described embodiment (FIG. 3) and modified examples (FIGS. 9 and 11), the movement 23 serving as the driving means is replaced with the printed circuit board serving as the second fixing portion. Instead of 26, it is fixed to the printed circuit board 14 which is the first fixing portion. Further, on the contrary, the slide gear 22 is formed on the design plate 51 as the second fixed portion instead of the movable casing 15 as the first fixed portion.

  Although FIG. 13 is shown as a modified example of FIG. 9, the present invention is not limited to this, and can be configured as a modified example of FIG. 3, FIG. 11, or FIG. 12.

  Even in this modification, the effects of the above-described embodiment can be obtained.

  An instrument drive mechanism according to the present invention is movably attached to an instrument housing part that houses display means, and is fixed to a first fixing part fixed to the display means and the instrument housing part. A second fixing portion; driving means fixed to one of the first fixing portion and the second fixing portion and moving the first fixing portion relative to the second fixing portion; And a transmission means for transmitting to the other of the two fixed portions. As long as this feature is satisfied, the present invention is not limited to the above-described example, and various other modifications can be considered.

FIG. 1 is a front view of a combination meter 1 that is an instrument to which an instrument drive mechanism 20 according to an embodiment of the present invention is applied. 2 is a cross-sectional view taken along line II-II in FIG. 3 is a cross-sectional view taken along line III-III in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is a front view of the combination meter 1 shown in FIG. 1 showing a state in which the vehicle speedometer 10 as the display means and the tachometer 30 as the display means are farthest apart. 6 is a front view of the combination meter 1 shown in FIG. 1 showing a state in which the vehicle speed meter 10 and the tachometer 30 are closest to each other. FIG. 7 is a circuit configuration diagram illustrating an electrical circuit configuration of the combination meter 1 shown in FIG. FIG. 8 is a cross-sectional view illustrating a first modification of the instrument drive mechanism 20 shown in FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. FIG. 10 is a cross-sectional view illustrating a second modification of the instrument drive mechanism 20 shown in FIG. 11 is a cross-sectional view taken along line XI-XI in FIG. FIG. 12 is a cross-sectional view illustrating a third modification of the instrument drive mechanism 20 shown in FIG. FIG. 13 is a cross-sectional view illustrating a fourth modification of the instrument drive mechanism 20 shown in FIG.

Explanation of symbols

1 Combination meter (instrument); 10 Speedometer (display means)
11, 31 Dial 12, 32 Pointer; 13 Movement; 13a Shaft 14 Printed circuit board (first fixed portion); 14a Flexible wiring 15, 35 Movable housing (first fixed portion)
15a Slide hole; 15b Gear hole; 15c Through hole 20 Instrument drive mechanism 21 Mounting member; 21a Guide part; 21b Attachment part; 21c Movable element 22 Slide gear (transmission means); means)
23 Movement (drive means)
23a Electromagnetic solenoid (drive means)
23b Permanent magnet (driving means); 23c Coil spring 24 Shaft (rotating part, driving means); 24a Shaft support member 25 Rotating gear (transmitting means); 25a Male threaded part (first screw part, transmitting means)
26 Printed circuit board (second fixed part)
30 Tachometer (display means)
40 liquid crystal display; 41 liquid crystal panel; 42 light emitting diode 51 design board (instrument housing); 51a through hole; 51b opening; 51c slide hole 52 case (instrument housing); 53 transparent cover (instrument housing) )
54 control device (control means); 55 vehicle speed sensor; 56 rotation sensor 57 gear position sensor; 58 ignition switch; 59 battery

Claims (7)

An instrument drive mechanism that attaches display means for displaying information to an instrument housing that accommodates the display means,
A first fixing part fixed to the display means;
A second fixing part fixed to the instrument housing part;
Driving means fixed to one of the first fixing portion and the second fixing portion and moving the first fixing portion relative to the second fixing portion;
An instrument drive mechanism comprising: a transmission unit including a transmission unit configured to transmit power of the drive unit to the other of the first fixed unit and the second fixed unit.   2. The instrument drive mechanism according to claim 1, wherein the transmission unit arranges the transmission unit in one of the vicinity of the first fixing unit and the vicinity of the second fixing unit. The drive means includes a rotating part that rotates,
3. The instrument according to claim 1, wherein the transmission unit converts the rotational motion of the rotating unit into a motion of sliding the first fixed unit with respect to the second fixed unit. 4. Drive mechanism. The transmission means includes a rotating gear fixed to the rotating portion, and a slide gear having teeth fixed to the other and meshing with teeth of the rotating gear.
4. The instrument drive mechanism according to claim 3, wherein the transmission unit includes a portion where the teeth of the rotating gear mesh with the teeth of the slide gear. The transmission means includes a first screw part included in the rotating part, and a second screw part fixed to the other and meshing with the first screw part,
4. The instrument drive mechanism according to claim 3, wherein the transmission portion is configured by a portion where the first screw portion and the second screw portion are engaged with each other. 5. The driving means includes a coil that generates a magnetic flux when an electric current flows, and a permanent magnet that is movably disposed with respect to the coil and generates a magnetic force as the power by receiving the magnetic flux of the coil. ,
The transmission means includes a mover fixed to the permanent magnet and the other and movably disposed with respect to the coil,
The instrument drive mechanism according to claim 1, wherein the transmission unit includes a portion where the transmission unit is fixed to the permanent magnet.   An instrument comprising the instrument drive mechanism according to any one of claims 1 to 6.

Images