JP2017146261A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device in which it is possible to suppress the reduction of reliability of apparatuses other than an electric actuator.SOLUTION: A movement rack gear 38 is provided one each for one pointer instrument at a different position in the direction of an axis L of an operation shaft 31. When a drive pin 37 and the movement rack gear 38 are at an overlapping position in the direction of the axis L, the drive pin 37 and the movement rack gear 38 are in a state of being engaged. Meanwhile, when the drive pin 37 and the movement rack gear 38 are at positions not overlapping in the direction of the axis L, the drive pin 37 and the movement rack gear 38 are in a state of being not engaged. When a pointer 28 of the pointer instrument is rotated, the movement rack gear 38 that corresponds to the pointer instrument and the drive pin 37 are brought to the overlapping position in the direction of the axis L through operation control of a first motor 26, and the operation shaft 31 is driven to rotate through operation control of a second motor 27.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a display device having a plurality of pointer-type instruments.

  It is often used to provide a plurality of pointer-type instruments such as a speedometer, a voltmeter, and a fuel fuel gauge on an instrument panel of a vehicle such as an automobile. In the display device described in Patent Document 1, an electrically driven type is adopted as such a pointer-type instrument. This pointer-type meter has an electric actuator (specifically, a solenoid coil) for rotating the pointer. The pointer of the pointer-type instrument is operated through the operation control of the actuator.

JP-A-10-132857

  Usually, since an electric actuator becomes a generation source of noise, there is a possibility of adversely affecting a device arranged in the vicinity and reducing the reliability of the device. In a display device having a plurality of pointer-type meters, if those having the above-described electric actuators are adopted as the pointer-type meters, the number of electric actuators is increased because the same number of electric actuators as the pointer-type meters are provided. . In such a display device, the range in which the electric actuators are arranged is likely to be widened, and the range in which noise generated by the electric actuators may be adversely affected is likely to be widened. .

  The present invention has been made in view of such circumstances, and an object thereof is to provide a display device capable of suppressing a decrease in reliability of devices other than the electric actuator.

  A display device for solving the above-described problems includes a plurality of pointer-type meters, an operation shaft extending linearly, a first electric actuator that linearly drives the operation shaft in the axial direction thereof, and the operation shaft having the axis thereof A second electric actuator that is driven to rotate about the rotation center, a drive pin that is shaped to protrude from the outer peripheral surface of the operation shaft, and a single pointer-type meter, one at a time in the axial direction; and It is movable in the tangential direction in a shape extending in the tangential direction of the movement locus of the drive pin accompanying the rotation of the operation shaft, and is always meshed with a pinion gear connected to the pointer of the pointer type instrument, In addition, when the position overlaps with the drive pin in the axial direction, the drive pin is engaged with the drive pin while the axial direction is not reached. A movable rack gear that does not mesh with the drive pin when the position does not overlap with the drive pin, and when operating the pointer of the pointer-type instrument, the movement position of the operation shaft in the axial direction is the pointer type to be operated The movable rack gear corresponding to the instrument and the drive pin are in a position where they overlap each other in the axial direction, and a controller that rotationally drives the operation shaft.

  According to the display device described above, the common operation shaft is driven by the two electric actuators, so that the movable rack gear corresponding to any one of the plurality of pointer type instruments and the drive pin are engaged with each other. Since the operation shaft can be rotationally driven, it is possible to operate the pointer of any pointer-type instrument. Then, by repeatedly executing the pointer operation of any pointer-type instrument by driving the operation shaft, the pointers of a plurality of pointer-type instruments can be operated individually.

  Moreover, in the display device, since the two electric actuators both drive the operation shaft, the electric actuators can be arranged at positions close to each other around the operation shaft. As a result, the range in which the electric actuator is disposed can be narrowed compared to a device in which the electric actuator is disposed at the position where each pointer-type instrument is disposed. A certain range can be narrowed. Therefore, it is possible to suppress a decrease in reliability of devices other than the electric actuator.

In the display device, it is preferable that the drive pins are provided at different positions in the axial direction, one for each movable rack gear.
According to the above display device, it is possible to arrange the movable rack gear and the drive pin corresponding to each pointer type instrument at a position closer to that of the device having only one common drive pin for a plurality of movable rack gears. become. Therefore, when the driving pin corresponding to the pointer-type instrument and the movable rack gear are engaged with each other to operate the pointer of the pointer-type instrument, the distance for moving the operation shaft in the axial direction can be reduced, and the drive The pin and the movable rack gear can be quickly meshed. Therefore, it is possible to quickly operate the pointers of a plurality of pointer-type meters.

  In the display device, the drive pin is in a state in which only one set of the drive pin and the movable rack gear is engaged according to a movement position of the operation shaft in the axial direction, and a plurality of sets of the drive pin and the movable rack gear. It is preferable that each is provided at a position where the state of meshing can be switched.

  According to the display device described above, by changing the movement position of the operation shaft in the axial direction, only the pointer of one pointer-type instrument can be operated while the operation shaft rotates once, or a plurality of pointer-type instruments can be operated. The pointer can be operated. Therefore, the pointer of each pointer-type instrument can be operated with a high degree of freedom as compared with a device that can operate only the pointer of one pointer-type instrument during one rotation of the operation shaft.

In the display device, it is preferable that a rotation phase of the operation shaft that causes the drive pin and the movable rack gear to mesh with each other is different for each drive pin.
According to the display device described above, the plurality of sets of driving pins and the moving rack gear do not mesh simultaneously while the operation shaft is rotationally driven by the second electric actuator. Can be operated with. As a result, the driving torque required for rotationally driving the second electric actuator in a stable state as compared with a device having a structure in which the pointers of the plurality of pointer-type meters are operated at the same timing by the second electric actuator ( Specifically, the peak value) can be reduced, and a small actuator can be employed.

  In the above display device, a reversing rack gear that is provided one for each of the movable rack gears, is movable in the tangential direction in a shape extending in the tangential direction, and is always meshed with the pinion gear; In the axial direction within the gap between the reversing rack gear and the operation shaft, the moving rack gear is disposed at a position different from that of the moving rack gear, and is always meshed with the reversing rack gear and overlaps the driving pin in the axial direction. It is preferable to include a reversing gear that sometimes meshes with the drive pin while not meshing with the drive pin when the position does not overlap the drive pin in the axial direction.

  In the display device, the operation shaft is rotationally driven in a predetermined direction in a state where the movement position in the axial direction of the operation shaft is set to a position where the drive pin and the moving rack gear overlap and the drive pin and the reverse gear are not overlapped. As a result, the drive pin meshes with the movable rack gear without meshing with the reverse gear, and the movable rack gear moves, so that the pointer of the pointer-type instrument rotates in the forward direction. In addition, the operation shaft is driven by rotating the operation shaft in a predetermined direction in a state where the movement position in the axial direction of the operation shaft is set to a position where the drive pin and the reverse gear are overlapped and the drive pin is not overlapped with the moving rack gear. Since the pin meshes with the reversing rack gear via the reversing gear without meshing with the moving rack gear, the reversing rack gear moves, so that the pointer of the pointer type instrument rotates in the reverse direction.

  As described above, according to the display device, the operation of rotating the pointer of each pointer-type meter in the forward direction and the operation of rotating the pointer in the reverse direction can be performed in a state where the operation shaft is rotationally driven in the same direction. Therefore, an operation for switching the rotation direction of the operation shaft is not required, and the control structure for controlling the operation of the second electric actuator can be simplified.

  ADVANTAGE OF THE INVENTION According to this invention, the fall of the reliability of apparatuses other than an electric actuator can be suppressed.

1 is a schematic diagram illustrating a schematic configuration of a display device according to an embodiment. The side view which shows the structure of an operating device. The front view of each movable rack gear and operation shaft seen from the arrow 3 direction of FIG. The side view of the gear mechanism which shows the state which the movable rack gear and drive pin corresponding to a voltmeter mesh. The side view of the gear mechanism which shows the state which the movable rack gear and drive pin corresponding to a fuel remaining amount meter mesh. The side view of the gear mechanism which shows the state which the movement rack gear and drive pin corresponding to a speedometer mesh with the movement rack gear and drive pin corresponding to a voltmeter. The front view of the gear mechanism which shows the state which the movable rack gear corresponding to a voltmeter and the drive pin meshed | engaged. The front view of the gear mechanism which shows the state which the movable rack gear and drive pin corresponding to a fuel remaining amount meter meshed. The front view which shows an example of the gear mechanism which has a reverse rack gear and a reverse gear. The side view which looked at the gear mechanism from the arrow M direction of FIG. The side view which looked at the gear mechanism of the other example from the arrow M direction of FIG.

Hereinafter, an embodiment of a display device will be described with reference to FIGS.
As shown in FIG. 1, the vehicle 20 has a meter panel 21 for displaying various driving states. The meter panel 21 includes a speedometer 22 that displays a traveling speed (vehicle speed SPD) of the vehicle 20, a voltmeter 23 that displays a voltage (battery voltage V) of an in-vehicle battery that supplies power to various electrical components, and a fuel tank. And a fuel remaining amount indicator 24 for displaying the remaining amount of fuel (fuel remaining amount RQ). As the speedometer 22, voltmeter 23, and fuel fuel gauge 24, a pointer-type instrument having a rotating pointer 28 is employed.

  Further, the vehicle 20 is provided with an operation device 25 for operating the speedometer 22, the voltmeter 23, and the fuel remaining amount gauge 24. The operating device 25 is integrated with the meter panel 21 and includes two rotary step motors (a first motor 26 as a first electric actuator and a second motor 27 as a second electric actuator) and a gear mechanism 30. Have.

  Furthermore, the vehicle 20 includes a control device 40 as a control unit configured to include a microcomputer, for example. The control device 40 incorporates detection signals from various sensors for detecting the driving state of the vehicle 20. As various sensors, a vehicle speed sensor 45 for detecting the vehicle speed SPD, a fuel remaining amount sensor 46 for detecting the remaining fuel amount RQ, a voltage sensor 47 for detecting the battery voltage V, and the like are provided. The control device 40 performs various calculations based on detection signals from various sensors, and executes operation control of the first motor 26 and operation control of the second motor 27 based on the calculation results.

  In the present embodiment, the gear mechanism 30 is operated through the operation control of the first motor 26 and the operation control of the second motor 27 by the control device 40, and the speedometer 22, the voltmeter 23, and the fuel remaining amount gauge 24 are operated. The

  Hereinafter, the structure of the gear mechanism 30 will be described in detail. In the following description, when it is necessary to distinguish between the components with the same reference numerals as the reference signs, the components of the speedometer 22 are suffixed with “A” and the voltage The components of the total 23 are distinguished by adding “B” at the end, and the components of the fuel remaining amount meter 24 are appended with “C” at the end. In particular, when there is no need to distinguish between pointer-type instruments, only numbers are assigned as symbols.

  As shown in FIG. 2, the gear mechanism 30 includes a substantially cylindrical operation shaft 31 that extends linearly. The operation shaft 31 is capable of reciprocating in the direction of the axis L (up and down direction in FIG. 2), and the rotation shaft 32A of the speedometer 22, the rotation shaft 32B of the voltmeter 23, and the rotation shaft 32C of the fuel fuel gauge 24. It is arrange | positioned so that it may extend in parallel. The axis L is a center line of the operation shaft 31 formed in a substantially cylindrical shape. In addition, a pointer 28A is integrally provided on the rotating shaft 32A of the speedometer 22, and a pointer 28B is integrally provided on the rotating shaft 32B of the voltmeter 23. The pointer 28C is integrally provided.

  At one end (downward in FIG. 2) of the operation shaft 31, an inclined tooth portion 33, which is a portion in which inclined teeth are formed around the entire circumference on the outer peripheral surface, is provided. A bevel gear 34 is integrally provided on the output shaft of the first motor 26, and this bevel gear 34 is always meshed with the bevel tooth portion 33 of the operation shaft 31. As a result, when the first motor 26 is rotationally driven, the operation shaft 31 is linearly driven in the axis L direction. Then, by controlling the operation of the first motor 26, the movement position of the operation shaft 31 in the direction of the axis L (the vertical direction in FIG. 2) is adjusted.

  Further, a portion of the outer peripheral surface of the operation shaft 31 adjacent to the inclined tooth portion 33 is provided with a flat tooth portion 35 that is a portion where flat teeth are formed over the entire circumference. A spur gear 36 is integrally provided on the output shaft of the second motor 27, and the spur gear 36 is always meshed with the spur gear portion 35 of the operation shaft 31. Thus, when the second motor 27 is driven to rotate, the operation shaft 31 is driven to rotate about the axis L. Then, by controlling the operation of the second motor 27, the rotational speed and rotational phase of the operation shaft 31 are adjusted.

  As shown in FIGS. 2 and 3, the operation shaft 31 has a plurality of (three in this embodiment) drive pins 37 that protrude from the outer peripheral surface. Each of these drive pins 37 is provided at a different position in the direction of the axis L with respect to one pointer-type instrument (specifically, a movable rack gear 38 to be described later). Specifically, from the inclined tooth portion 33 side of the operation shaft 31, the drive pin 37C corresponding to the fuel remaining amount meter 24, the drive pin 37A corresponding to the speedometer 22, and the drive pin 37B corresponding to the voltmeter 23 are arranged in this order. It is arranged like this.

  The gear mechanism 30 has a plurality of (in-line) shapes extending in the tangential direction of the movement locus of the drive pin 37 accompanying the rotation of the operation shaft 31 (specifically, an annular portion along the outer surface of the operation shaft 31 around the axis L). In the embodiment, three rack gears (moving rack gear 38) are provided. These movable rack gears 38 are provided at different positions in the direction of the axis L of the operation shaft 31 one by one with respect to one pointer type instrument. Specifically, the movable rack gear 38C corresponding to the fuel remaining amount meter 24, the movable rack gear 38A corresponding to the speedometer 22, and the movable rack gear 38B corresponding to the voltmeter 23 are arranged in this order from the inclined tooth portion 33 side of the operation shaft 31. It is arranged like this.

  The moving rack gear 38A can reciprocate in the tangential direction of the movement locus (direction indicated by arrow A1 in FIG. 3), and is always meshed with a pinion gear 39A integrated with the rotation shaft 32A of the speedometer 22. When the movable rack gear 38A and the drive pin 37A overlap each other in the direction of the axis L (for example, the position shown in FIG. 2), the second motor 27 is driven to rotate, so that the movable rack gear 38A and the drive pin 37A are It will be in a state of meshing. On the other hand, as shown in FIG. 4, when the movable rack gear 38A and the drive pin 37A are in positions that do not overlap with each other in the direction of the axis L, the drive pin 37A moves idle even if the second motor 27 is driven to rotate. It will be in the state which does not mesh with the rack gear 38A.

  The movable rack gear 38B can reciprocate in the tangential direction of the movement locus (the direction indicated by the arrow B1 in FIG. 3), and is always meshed with a pinion gear 39B integrated with the rotary shaft 32B of the voltmeter 23. As shown in an example in FIG. 4, when the movable rack gear 38B and the drive pin 37B overlap each other in the direction of the axis L, the second motor 27 is driven to rotate, thereby moving the movable rack gear 38B and the drive pin 37B. Will be engaged. On the other hand, when the movable rack gear 38B and the drive pin 37B are at positions that do not overlap in the direction of the axis L (for example, the position shown in FIG. 2), even if the second motor 27 is driven to rotate, the drive pin 37B rotates idly and the movable rack gear. It will be in the state which does not mesh with 38B.

  The movable rack gear 38C can reciprocate in the tangential direction of the movement locus (the direction indicated by the arrow C1 in FIG. 3), and always meshes with the pinion gear 39C integrated with the rotary shaft 32C of the fuel remaining amount gauge 24. As shown in FIG. 5, when the movable rack gear 38C and the drive pin 37C overlap each other in the direction of the axis L, the second motor 27 is driven to rotate so that the movable rack gear 38C and the drive pin 37C It will be in a state of meshing. On the other hand, when the movable rack gear 38C and the drive pin 37C are at positions that do not overlap in the direction of the axis L (for example, the position shown in FIG. 2), even if the second motor 27 is driven to rotate, the drive pin 37C rotates idly and the movable rack gear. It will be in the state which does not mesh with 38C.

In this embodiment, according to the movement position of the operation shaft 31 in the direction of the axis L, only one of the three combinations of the drive pin 37 and the movable rack gear 38 is engaged (the following states 1, 2). And any one of the states 3) and a state in which the two sets mesh with each other (the following state 4) are switched.
(State 1) As shown in FIG. 2, only the drive pin 37A and the moving rack gear 38A corresponding to the speedometer 22 are engaged.
(State 2) As shown in FIG. 4, only the drive pin 37B and the movable rack gear 38B corresponding to the voltmeter 23 are engaged.
(State 3) As shown in FIG. 5, only the drive pin 37C and the movable rack gear 38C corresponding to the fuel fuel gauge 24 are engaged.
(State 4) As shown in FIG. 6, the drive pin 37A and the movable rack gear 38A corresponding to the speedometer 22 and the drive pin 37B and the movable rack gear 38B corresponding to the voltmeter 23 are meshed together.

Hereinafter, execution modes of the operation control of the first motor 26 and the second motor 27 will be described.
Here, first, an execution mode of the operation control of the first motor 26 and the second motor 27 when the pointer 28A of the speedometer 22 is operated will be described.

In this case, the operation shaft 31 is linearly driven in the direction of the axis L so as to be in the state 1 (state shown in FIG. 2) through the operation control of the first motor 26.
When the pointer 28A of the speedometer 22 is rotated in the forward direction (clockwise direction in FIG. 3), the operation shaft 31 is rotationally driven in the forward rotation direction through the operation control of the second motor 27. As a result, the movable rack gear 38A moves in the forward direction (leftward in FIG. 3) during the period in which the drive pin 37A and the movable rack gear 38A are engaged while the operation shaft 31 is rotating. As a result, the pinion gear 39A integrated with the rotation shaft 32A of the speedometer 22 rotates in the forward rotation direction, and the pointer 28A of the speedometer 22 also rotates in the forward rotation direction.

  On the other hand, when the pointer 28A of the speedometer 22 is rotated in the reverse direction (counterclockwise direction in FIG. 3), the operation shaft 31 is rotationally driven in the reverse rotation direction through the operation control of the second motor 27. As a result, the movable rack gear 38A moves in the reverse direction (rightward in FIG. 3) during the period in which the drive pin 37A and the movable rack gear 38A mesh while the operation shaft 31 is rotating. As a result, the pinion gear 39A integrated with the rotation shaft 32A of the speedometer 22 rotates in the reverse rotation direction, and the pointer 28A of the speedometer 22 also rotates in the reverse rotation direction.

  In the present embodiment, the period (state 1) during the operation control of the first motor 26 (state 1) is adjusted while adjusting the rotation speed and the rotation direction of the operation shaft 31 through the operation control of the second motor 27 (specifically, the drive pin 37A and By adjusting the period during which the movable rack gear 38A is engaged, the pointer 28A of the speedometer 22 can be operated at an arbitrary speed and at an arbitrary angle.

Next, an execution mode of the operation control of the first motor 26 and the second motor 27 when the pointer 28B of the voltmeter 23 is operated will be described.
In this case, the operation shaft 31 is linearly driven in the direction of the axis L so as to be in the state 2 (state shown in FIG. 4) through the operation control of the first motor 26.

  When the pointer 28B of the voltmeter 23 is rotated in the forward direction (clockwise direction in FIG. 3), the operation shaft 31 is rotationally driven in the forward rotation direction through the operation control of the second motor 27. As a result, the movable rack gear 38B moves in the forward direction (rightward in FIG. 3) during the period in which the drive pin 37B and the movable rack gear 38B mesh while the operation shaft 31 is rotating. As a result, the pinion gear 39B integrated with the rotation shaft 32B of the voltmeter 23 rotates in the forward rotation direction, and the pointer 28B of the voltmeter 23 also rotates in the forward rotation direction.

  On the other hand, when the pointer 28B of the voltmeter 23 is rotated in the reverse direction (counterclockwise direction in FIG. 3), the operation shaft 31 is rotationally driven in the reverse rotation direction through the operation control of the second motor 27. As a result, during the period in which the drive pin 37B and the movable rack gear 38B mesh while the operation shaft 31 is rotating, the movable rack gear 38B moves in the reverse direction (leftward in FIG. 3). As a result, the pinion gear 39B integrated with the rotation shaft 32B of the voltmeter 23 rotates in the reverse rotation direction, and the pointer 28B of the voltmeter 23 also rotates in the reverse rotation direction.

  In the present embodiment, while adjusting the rotation speed and the rotation direction of the operation shaft 31 through the operation control of the second motor 27, the period of time (state 2) through the operation control of the first motor 26 (specifically, the drive pin 37B). And the movable rack gear 38B mesh with each other), the pointer 28B of the voltmeter 23 can be operated at an arbitrary speed at an arbitrary angle.

Next, an execution mode of the operation control of the first motor 26 and the second motor 27 when the pointer 28C of the fuel remaining amount gauge 24 is operated will be described.
In this case, the operation shaft 31 is linearly driven in the direction of the axis L so as to be in the state 3 (the state shown in FIG. 5) through the operation control of the first motor 26.

  When the pointer 28C of the fuel fuel gauge 24 is rotated in the forward direction (clockwise direction in FIG. 3), the operation shaft 31 is rotationally driven in the forward rotation direction through the operation control of the second motor 27. As a result, the movable rack gear 38C moves in the forward direction (rightward in FIG. 3) during the period in which the drive pin 37C and the movable rack gear 38C are engaged while the operation shaft 31 is rotating. As a result, the pinion gear 39C integrated with the rotation shaft 32C of the fuel fuel gauge 24 rotates in the forward rotation direction, and the pointer 28C of the voltmeter 23 also rotates in the forward rotation direction.

  On the other hand, when the indicator 28C of the fuel fuel gauge 24 is rotated in the reverse direction (counterclockwise direction in FIG. 3), the operation shaft 31 is rotationally driven in the reverse rotation direction through the operation control of the second motor 27. . As a result, during the period in which the drive pin 37C and the movable rack gear 38C mesh while the operation shaft 31 is rotating, the movable rack gear 38C moves in the reverse direction (leftward in FIG. 3). As a result, the pinion gear 39C integrated with the rotation shaft 32C of the voltmeter 23 rotates in the reverse rotation direction, and the pointer 28C of the voltmeter 23 also rotates in the reverse rotation direction.

  In the present embodiment, while adjusting the rotation speed and direction of the operation shaft 31 through the operation control of the second motor 27, the period of time (state 3) through the operation control of the first motor 26 (specifically, the drive pin 37C). And the movable rack gear 38C are adjusted), the pointer 28C of the fuel fuel gauge 24 can be operated at an arbitrary speed and at an arbitrary angle.

  Next, an execution mode of the operation control of the first motor 26 and the second motor 27 when the pointer 28A of the speedometer 22 and the pointer 28B of the voltmeter 23 are simultaneously operated will be described.

In this case, the operation shaft 31 is linearly driven in the direction of the axis L so as to be in the state 4 (state shown in FIG. 6) through the operation control of the first motor 26.
When the pointer 28A of the speedometer 22 and the pointer 28B of the voltmeter 23 are rotated in the forward direction (clockwise direction in FIG. 3), the operation shaft 31 is rotated in the forward direction through the operation control of the second motor 27. Is driven to rotate. On the other hand, when the indicator 28A of the speedometer 22 and the indicator 28B of the voltmeter 23 are rotated in the reverse direction (counterclockwise direction in FIG. 3), the operation shaft 31 is reversely rotated through the operation control of the second motor 27. It is rotationally driven in the direction. In the present embodiment, the rotation speed and direction of the operation shaft 31 are adjusted through the operation control of the second motor 27, and the period (state 4) is reached through the operation control of the first motor 26 (specifically, the drive pin). 37A and the movable rack gear 38A mesh with each other, and the drive pin 37B and the movable rack gear 38B mesh with each other). Thereby, the pointer 28A of the speedometer 22 and the pointer 28B of the voltmeter 23 can be operated at an arbitrary angle and at an arbitrary angle, respectively.

Hereinafter, the function and effect of the display device of this embodiment will be described.
According to this embodiment, by driving the common operation shaft 31 by the first motor 26 and the second motor 27, the three pointer-type meters (speed meter 22, voltmeter 23, and fuel remaining amount meter 24) The operation rack 31 can be driven to rotate while the movable rack gear 38 corresponding to any one of the pointer-type instruments and the drive pin 37 are engaged with each other. Thereby, the pointer 28 of an arbitrary pointer-type instrument can be operated. Then, by repeatedly executing the operation of the pointer 28 of any pointer-type instrument by driving the operation shaft 31, the pointers 28 of the three pointer-type instruments can be operated separately.

  In addition, in the present embodiment, since both the first motor 26 and the second motor 27 drive the operation shaft 31, the first motor 26 and the second motor 27 are arranged at positions close to each other around the operation shaft 31. Can be set. As a result, the rotation motors (the first motor 26 and the second motor 27) are arranged in comparison with the devices in which the rotation motors are arranged at the arrangement positions of the speedometer 22, the voltmeter 23, and the fuel fuel gauge 24, respectively. Since the range to be generated can be narrowed, the range in which the noise generated by these rotary motors may adversely affect can be narrowed. Therefore, it is possible to suppress a decrease in reliability of devices other than the first motor 26 and the second motor 27.

  Further, in the comparative apparatus in which the rotary motors are arranged at the positions where the speedometer 22, the voltmeter 23, and the fuel fuel gauge 24 are arranged, three rotary motors are required. On the other hand, in the display device of the present embodiment, three pointer-type instruments can be operated by the two motors 26 and 27, so that the manufacturing cost and weight are reduced as compared with the device of the comparative example. Can do.

  In the present embodiment, the rotation phase of the operation shaft 31 at which the drive pin 37A and the movable rack gear 38A shown in FIG. 3 mesh with each other, and the operation at which the drive pin 37B and the movable rack gear 38B shown in FIG. The rotational phase of the shaft 31 is different from the rotational phase of the operation shaft 31 in which the drive pin 37C and the movable rack gear 38C shown in FIG. 3, 7, and 8, in order to facilitate understanding of the rotation phase of the operation shaft 31, a portion where the drive pin 37 </ b> A is formed is indicated by an arrow as a reference phase.

  Thereby, when the operation shaft 31 is rotationally driven in the state 4 (state shown in FIG. 6) to operate the speedometer 22 and the fuel fuel gauge 24 simultaneously, the drive pin 37A corresponding to the speedometer 22 and The movable rack gear 38A, the drive pin 37B corresponding to the voltmeter 23, and the movable rack gear 38B are not engaged at the same time. Accordingly, the pointer 28A of the speedometer 22 and the pointer 28B of the voltmeter 23 are operated at different timings. As a result, as compared with a device having a structure in which the pointer 28A of the speedometer 22 and the pointer 28B of the voltmeter 23 are operated at the same timing, the drive necessary for rotationally driving the second motor 27 in a stable state. Since the torque (specifically, its peak value) can be reduced, a small rotary motor can be employed as the second motor 27.

According to the present embodiment, the following effects can be obtained.
(1) A decrease in reliability of devices other than the first motor 26 and the second motor 27 can be suppressed.

  (2) The drive pins 37 are provided at different positions in the direction of the axis L of the operation shaft 31, one for each movable rack gear 38. Therefore, compared to a device having only one common drive pin for the three movable rack gears, the movable rack gear 38 and the drive pin 37 for driving the gear 38 can be arranged at a closer position. Thereby, when the drive pin 37 and the movable rack gear 38 corresponding to the pointer-type instrument are operated to operate the pointer 28 of the pointer-type instrument, the distance for moving the operation shaft 31 in the direction of the axis L can be reduced. Therefore, the drive pins 37 and the movable rack gear 38 can be quickly meshed. Therefore, the pointer 28A of the speedometer 22, the pointer 28B of the voltmeter 23, and the pointer 28C of the fuel remaining amount meter 24 can be quickly operated.

  (3) Depending on the movement position of the operation shaft 31 in the direction of the axis L, only one of the combinations of the three sets of driving pins 37 and the movable rack gear 38 is engaged, and two are engaged. It will be switched. Therefore, by changing the movement position of the operation shaft 31 in the direction of the axis L, only one of the pointers 28 of the three pointer-type meters is operated while the operation shaft 31 rotates once, The pointers of the two pointer-type meters (the pointer 28A of the speedometer 22 and the pointer 28B of the voltmeter 23) can be operated. Therefore, the pointer 28 of the three pointer type instruments can be operated with a high degree of freedom as compared with a device that can operate only the pointer of one pointer type instrument while the operation shaft 31 rotates once.

  (4) The rotation phase of the operation shaft 31 at which the drive pin 37A and the movable rack gear 38A are engaged is different from the rotation phase of the operation shaft 31 at which the drive pin 37B and the movable rack gear 38B are engaged. For this reason, the second motor 27 is driven to rotate in a stable state as compared with a device in which the second motor 27 operates the pointer 28A of the speedometer 22 and the pointer 28B of the voltmeter 23 at the same timing. The driving torque required for the second motor 27 can be reduced, and a small rotary motor can be adopted as the second motor 27.

The above embodiment may be modified as follows.
The oblique tooth portion 33 of the operation shaft 31 and the output shaft of the first motor 26 may be connected via a gear mechanism having a plurality of gears.

The spur tooth portion 35 of the operation shaft 31 and the output shaft of the second motor 27 may be connected via a gear mechanism having a plurality of gears.
-You may make it provide two sets of moving rack gears and a drive pin with respect to one pointer type instrument (for example, speedometer 22). In this case, the rotational phase of the operation shaft 31 where one moving rack gear and the drive pin are engaged with each other and the rotational phase of the operation shaft 31 where the other movable rack gear and the drive pin are engaged are set to different phases. That's fine. Further, according to the movement position of the operation shaft 31 in the direction of the axis L, it is possible to switch between a state in which only one set of moving rack gear and driving pin is engaged and a state in which two sets of moving rack gear and driving pin are engaged together. Each movable rack gear and each drive pin can be disposed at a certain position.

  In such a device, the amount of operation and the number of operations of the pointer 28 of the pointer-type instrument per one rotation of the operation shaft 31 are two sets of the moving rack gears and the number of operations compared to the case where only one set of the moving rack gear and the driving pin are engaged. More when the drive pins are engaged together. Therefore, according to the above-described apparatus, the operation speed of the pointer 28 of the pointer-type instrument is changed by switching between a state in which only one set of moving rack gear and driving pin is engaged and a state in which two sets of moving rack gear and driving pin are engaged together. Since the operation interval can be variably set, the pointer 28 can be operated with a high degree of freedom. It is also possible to provide three or more sets of movable rack gears and drive pins for one pointer type instrument.

  If the two sets of the movable rack gears 38 and the drive pins 37 are not meshed at the same timing when the operation shaft 31 is rotationally driven, the two sets of the movable rack gears 38 and the drive pins 37 You may make the rotation phase of the operation shaft 31 which meshes | engage with the same phase. For example, the rotation phase of the operation shaft 31 in which the movable rack gear 38B and the drive pin 37B are engaged can be the same as the rotation phase of the operation shaft 31 in which the movable rack gear 38C and the drive pin 37C are engaged. . In addition, the rotation phase of the operation shaft 31 where the movable rack gear 38A and the drive pin 37A are engaged with each other and the rotation phase of the operation shaft 31 where the movable rack gear 38C and the drive pin 37C are engaged may be set to the same phase. Is possible. The effect described in the above (4) can be obtained also by such an apparatus.

Each moving rack gear 38 and each driving pin 37 are not limited to be arranged in a mode that can be switched to the above (State 4), but any one of the following (State 5) to (State 7) You may make it arrange | position in the aspect which can be switched.
(State 5) A state in which all of the three sets of the movable rack gear 38 and the drive pin 37 are engaged.
(State 6) A state where the movable rack gear 38A and the drive pin 37A mesh with the movable rack gear 38C and the drive pin 37C.
(State 7) A state in which the movable rack gear 38B and the drive pin 37B mesh with the movable rack gear 38C and the drive pin 37C.

  In addition, as a mode which can be switched in such a device, not only all of (State 4) to (State 7) but also any one of (State 4) to (State 7) is employed. Or only two of them can be adopted, or only three of them can be adopted.

  A state in which only one set of the plurality of sets of moving rack gears 38 and the drive pins 37 is selectively engaged so that the plurality of sets of moving rack gears 38 and the drive pins 37 are not engaged at the same time. As described above, each movable rack gear 38 and each drive pin 37 may be arranged.

  -You may make all the rotation phases of the operation shaft 31 into which the 3 sets of movable rack gears 38 and the drive pin 37 mesh with each other into the same phase. Further, the rotation phase of the operation shaft 31 where the movable rack gear 38A and the drive pin 37A are engaged with each other and the rotation phase of the operation shaft 31 where the movable rack gear 38B and the drive pin 37B are engaged may be set to the same phase. . Even with such an apparatus, the same effects as described in the above (1) to (3) can be obtained.

  The rotation shaft 32A of the speedometer 22 and the moving rack gear 38A are always connected via a gear mechanism having a plurality of gears, or the rotation shaft 32B of the voltmeter 23 and the moving rack gear 38B are a gear having a plurality of gears. Alternatively, it may be always connected via a mechanism. It is also possible to always connect the rotating shaft 32C of the fuel fuel gauge 24 and the movable rack gear 38C via a gear mechanism having a plurality of gears.

A reverse rack gear and a reverse gear may be provided for the speedometer 22, the voltmeter 23, and the fuel remaining amount gauge 24 in addition to the movable rack gear 38.
An example of such a display device is shown in FIGS. 9 and 10 show an example in which a reverse rack gear 51 and a reverse gear 52 are provided for the speedometer 22. As shown in FIGS. 9 and 10, the reversing rack gear 51 has a shape extending in the tangential direction (direction indicated by arrow D <b> 1 in FIG. 9) of the movement locus of the drive pin 37 </ b> A accompanying the rotation of the operation shaft 31. It is provided so that reciprocation is possible. The reverse rack gear 51 is always meshed with a pinion gear 39 </ b> A integrated with the output shaft of the speedometer 22. The reverse rack gear 51 is provided at a position different from the movable rack gear 38 </ b> A in the direction of the axis L of the operation shaft 31. The reversing gear 52 is disposed in the gap between the reversing rack gear 51 and the operation shaft 31 and always meshes with the reversing rack gear 51. The reversing gear 52 is provided at the same position as the reversing rack gear 51 in the direction of the axis L. When the reversing gear 52 and the driving pin 37A overlap each other in the direction of the axis L, the second motor 27 (see FIG. 2) is driven to rotate so that the reversing gear 52 and the driving pin 37A are engaged. . On the other hand, when the reversing gear 52 and the drive pin 37A are at a position where they do not overlap in the direction of the axis L (position shown in FIG. 10), even if the second motor 27 is driven to rotate, the drive pin 37A rotates idly and the reversing gear 52 Will not mesh.

  9 and 10, if the reversing gear 52 and the moving rack gear 38A are arranged at different positions in the axis L direction, the reversing rack gear 51 and the moving rack gear 38A are partially arranged in the axis L direction. The reversing gear 52 and the movable rack gear 38A may be arranged so as to partially overlap in the direction of the axis L. According to such a display device, the gear mechanism can be reduced in size.

  Another example of the display device is shown in FIGS. 9 and 11 show an example in which a reverse rack gear 61 and a reverse gear 62 are provided for the speedometer 22. As shown in FIGS. 9 and 11, the reversing rack gear 61 extends in the tangential direction (direction indicated by the arrow D <b> 1 in FIG. 9) of the movement locus of the drive pin 37 </ b> A accompanying the rotation of the operation shaft 31. It is provided so that reciprocation is possible. The reverse rack gear 61 is always meshed with a pinion gear 39 </ b> A integrated with the output shaft of the speedometer 22. Further, the reverse rack gear 61 is provided at a position where the operation shaft 31 is sandwiched between the reversing rack gear 38 </ b> A and at the same position as the moving rack gear 38 </ b> A in the axis L direction of the operation shaft 31. The reversing gear 62 is disposed in the gap between the reversing rack gear 61 and the operation shaft 31 and always meshes with the reversing rack gear 61. The reversing gear 62 is disposed at a position different from the moving rack gear 38A in the axis L direction (specifically, a position partially overlapping with the moving rack gear 38A). When the reversing gear 62 and the drive pin 37A overlap each other, the second motor 27 (see FIG. 2) is driven to rotate so that the reversing gear 62 and the drive pin 37A are engaged. On the other hand, when the reversing gear 62 and the drive pin 37A are in positions that do not overlap in the direction of the axis L (position shown in FIG. 11), even if the second motor 27 is driven to rotate, the drive pin 37A rotates idly and the reversing gear 62 Will not mesh. According to such a display device, since the movable rack gear 38A and the reverse rack gear 61 are provided at the same position in the axis L direction, the gear mechanism is smaller than those provided at different positions in the axis L direction. Can be achieved. In the display device shown in FIGS. 9 and 11, the movable rack gear 38A and the reverse rack gear 61 may be disposed at slightly different positions in the axis L direction.

  In these exemplary display devices, the movement position of the operation shaft 31 in the direction of the axis L is set so that the drive pin 37A and the movable rack gear 38A overlap in the direction of the coaxial line L, and the drive pin 37A and the reversing gears 52 and 62 do not overlap. The second motor 27 is rotationally driven in a predetermined direction (the clockwise direction in FIG. 9) in the position (the state shown in FIG. 11). As a result, the drive pin 37A meshes with the movable rack gear 38A without meshing with the reversing gears 52 and 62, and the movable rack gear 38A moves in a predetermined direction (right direction in FIG. 9). At this time, the pointer 28A (see FIG. 3) of the speedometer 22 rotates in the forward direction.

  On the other hand, the movement position of the operation shaft 31 in the direction of the axis L is set so that the drive pin 37A and the reversing gears 52 and 62 overlap in the direction of the coaxial line L, and the drive pin 37A and the movement rack gear 38A do not overlap. The second motor 27 is rotationally driven in a predetermined direction. As a result, the drive pin 37A meshes with the reversing rack gears 51 and 61 via the reversing gears 52 and 62 without meshing with the moving rack gear 38A, and the reversing rack gears 51 and 61 move in a predetermined direction (right direction in FIG. 9). To come. At this time, the pointer 28A of the speedometer 22 rotates in the reverse direction.

  As described above, according to the display device, the operation of rotating the pointer 28 of each pointer-type instrument in the forward direction and the operation of rotating the pointer 28 in the reverse direction can be performed in a state where the second motor 27 is rotationally driven in the same direction. it can. Therefore, an operation for switching the rotation direction of the output shaft of the second motor 27 becomes unnecessary, and the control structure of the operation control of the second motor 27 can be simplified.

  A single drive pin may be provided for a plurality (two or three) of moving rack gears 38. Even with such a device, by changing the movement position of the operation shaft 31 in the direction of the axis L, a plurality of movable rack gears 38 (specifically, the pointers 28 of a plurality of pointer-type instruments) are individually operated by a common drive pin. can do.

A rotary motor other than the step motor may be employed as the first motor 26 or the second motor 27. Further, a linear motor can be adopted as the first motor 26.
The display device of the above embodiment can be applied to a device that operates the pointers of two pointer-type meters and a device that operates the pointers of four or more pointer-type meters, with the configuration changed as appropriate. .

  The display device of the above embodiment includes a tachometer that displays the rotation speed of the output shaft of the onboard internal combustion engine, a water temperature meter that displays the temperature of the cooling water of the onboard internal combustion engine, and an oil that displays the temperature of the lubricating oil of the onboard internal combustion engine. The present invention is also applicable to a display device having a pointer-type instrument such as a thermometer and a hydraulic gauge that displays the pressure of the lubricating oil.

  DESCRIPTION OF SYMBOLS 20 ... Vehicle, 21 ... Meter panel, 22 ... Speedometer, 23 ... Voltmeter, 24 ... Fuel fuel gauge, 25 ... Operating device, 26 ... First motor, 27 ... Second motor, 28, 28A, 28B, 28C ... Pointer, 30... Gear mechanism, 31... Operation shaft, 32, 32A, 32B, and 32C... Rotating shaft, 33 ... Inclined tooth portion, 34 ... Inclined gear, 35 ... Spur gear portion, 36 ... Spur gear, 37, 37A, 37B, 37C ... Drive pin, 38,38A, 38B, 38C ... Moving rack gear, 39A, 39B, 39C ... Pinion gear, 40 ... Control device, 45 ... Vehicle speed sensor, 46 ... Fuel remaining amount sensor, 47 ... Voltage sensor, 51 61, reverse rack gear, 52, 62, reverse gear.

Claims (5)

Multiple pointer-type instruments;
An operation shaft extending linearly;
A first electric actuator for linearly driving the operation shaft in its axial direction;
A second electric actuator that rotationally drives the operation shaft about the axis thereof;
A drive pin having a shape protruding from the outer peripheral surface of the operation shaft;
It can be moved in the tangential direction in a shape that extends in the tangential direction of the movement trajectory of the drive pin accompanying the rotation of the operation shaft, and is provided at different positions in the axial direction one by one with respect to the pointer type instrument And is always meshed with a pinion gear connected to the pointer of the pointer-type meter and is in a state of meshing with the drive pin when the position overlaps with the drive pin in the axial direction. A movable rack gear that does not mesh with the drive pin when the position does not overlap the drive pin in the direction;
When operating the pointer of the pointer type instrument, the moving position of the operation shaft in the axial direction is set to a position where the movable rack gear corresponding to the pointer type instrument to be operated and the drive pin overlap in the axial direction. And a control unit that rotationally drives the operation shaft. The display device according to claim 1,
The display device according to claim 1, wherein the driving pins are provided at different positions in the axial direction, one for each moving rack gear. The display device according to claim 2,
The drive pin has a state in which only one set of the drive pin and the movable rack gear meshes and a state in which a plurality of sets of the drive pin and the movable rack gear mesh according to the movement position of the operation shaft in the axial direction. Each of the display devices is provided at a position at which the screen is switched. The display device according to claim 2 or 3,
The display device according to claim 1, wherein a rotational phase of the operation shaft at which the drive pin and the movable rack gear mesh with each other is different for each drive pin. The display device according to any one of claims 1 to 4,
A reversing rack gear that is provided one by one with respect to one moving rack gear, is movable in the tangential direction in a shape extending in the tangential direction, and always meshes with the pinion gear;
In the axial direction within the gap between the reversing rack gear and the operation shaft, the moving rack gear is disposed at a position different from that of the moving rack gear, and is always meshed with the reversing rack gear and overlaps the driving pin in the axial direction. A display device comprising: a reversing gear that is sometimes engaged with the drive pin while being in a position that does not overlap with the drive pin in the axial direction.

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