JP2005271784A - In-vehicle electronic instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an in-vehicle electronic instrument capable of surely preventing sinking accompanied by rattling caused by backlash of a movable panel in the upright attitude or pressing operation. <P>SOLUTION: In this in-vehicle electronic instrument, drive force of a second motor 10 mounted on a slide base 7 is transmitted to a movable panel 4 through a second reduction gear train 16, and thereby the movable panel 4 having a touch panel type display screen 8 is turned between the tilt attitude and the upright attitude in front of a body device 1. A winding part 22a of a torsion coil spring 22 is inserted into a shaft part 21a of a bracket 21 fixed on the movable panel 4, and both arm parts 22b and 22c of the torsion coil spring 22 are fitted to the bracket 21 and the slide base 7, and thereby the movable plate 4 is energized to the vertical direction by a spring load of the torsion coil spring 22. Even when the movable panel 4 is turned from the tilt attitude to a maximum upright angle exceeding 90°, the torsion coil spring 22 energizes the movable panel 4 further to the vertical direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an in-vehicle electronic device in which a movable panel having a display screen is rotated in front of a main body device by a driving force of a motor, and more particularly to an in-vehicle electronic device equipped with a touch panel type display screen. It is.

  Conventionally, as an example of this type of in-vehicle electronic device, a slide member is disposed in the main body device so as to be movable in the front-rear direction, and a movable panel is rotatably supported at the front end portion of the slide member, There is known a movable panel that is rotated in a standing posture in front of a main body device during use (see, for example, Patent Document 1). First and second motors and corresponding reduction gear trains are mounted on the slide member, and the final gear of the first reduction gear train that is driven to rotate by using the first motor as a drive source is the main unit device. The last stage gear of the second reduction gear train that meshes with the rack extending in the front-rear direction and is driven to rotate by using the second motor as a drive source is meshed with a gear provided at the rotation center of the movable panel. The movable panel is provided with a display screen such as a liquid crystal display, and this movable panel is biased by a spring member so as to be in a horizontal (tilted) posture.

  In such an in-vehicle electronic device, when the slide member is pulled into the retracted position in the main body device, the movable panel is stored in the main body device while maintaining a horizontal posture. When the first motor is rotated in one direction in this state, the rotational force is transmitted to the final gear through the first reduction gear train, and the slide member moves from the retracted position to the advanced position along the rack. Start. Then, when the second motor is rotated in one direction after the slide member has moved to the forward position or immediately before, the rotational force is transmitted to the movable panel side gear via the second reduction gear train. The movable panel rotates in front of the main unit and stands up at a predetermined inclination angle, and the display screen provided on the movable panel faces the user (passenger). At this time, since the driving force of the second motor erects the movable panel against the biasing force of the spring member, a spring load in a direction to return the movable panel to the horizontal posture is stored in the spring member. The backlash of the second reduction gear train due to the spring load of the spring member is prevented from rattling the movable panel. On the other hand, when the second motor is rotated in the reverse direction while the movable panel is in the standing state, the rotational force is transmitted to the gear on the movable panel side via the second reduction gear train and can be moved in front of the main unit. The panel rotates and returns to the horizontal state. In this case, the spring load of the spring member gradually decreases as the movable panel rotates, and the spring load of the spring member becomes substantially zero when the movable panel returns to the horizontal state. When the first motor is subsequently rotated in the reverse direction, the slide member moves from the forward position to the backward position along the rack, so that the movable panel is again stored in the main body while maintaining the horizontal posture.

As another conventional example, a winding portion of a torsion coil spring is attached to the rotating shaft of the movable panel, and both the arm portions of the torsion coil spring are hooked on the movable panel and the slide member so that the movable panel stands upright. 2. Description of the Related Art An in-vehicle electronic device that is biased in a posture direction is known (for example, see Patent Document 2). The spring load of the torsion coil spring is greatest when the movable panel is in a horizontal position, and gradually decreases as the movable panel rotates in the upright direction. When the rotation angle of the movable panel reaches 90 degrees, the torsion coil spring The spring load is set to be zero.
JP 2002-362243 (page 3-4, FIG. 1) JP-A-6-199186 (page 2-3, FIG. 1)

  Among the above-described conventional examples, in the former in-vehicle electronic device in which the movable panel is urged in the horizontal posture direction by the spring member, when the movable panel is stopped in the standing state, the spring member accumulates the force. Since the backlash of the reduction gear train is canceled by the applied spring load, it is possible to prevent the movable panel from rattling due to external vibration from a traveling automobile or the like. However, when the display screen provided on the movable panel is a touch panel type, the direction in which the user presses the touch panel and the biasing direction of the spring member are reversed, so the spring load of the spring member is added to the user's pressing operation force. In such a case, every time the user presses the touch panel, the movable panel sinks in the pressing direction by the amount corresponding to the backlash, resulting in a problem that the operation quality is lowered. Such a problem is not limited to the case of a touch panel display screen, and similarly occurs when, for example, the user presses an operation key disposed around the display screen.

  On the other hand, in the latter in-vehicle electronic device in which the movable panel is urged in the standing direction by the torsion coil spring, the torsion coil spring does not move while the movable panel rotates from the horizontal position to the standing position by using the motor as a drive source. Since the movable panel is urged in the standing direction to assist the driving force of the motor, the movable panel can be stably rotated by the low torque motor. However, since the spring load of the torsion coil spring is set to zero when the rotation angle of the movable panel reaches 90 degrees, when the movable panel is stopped in the standing posture, the motor and the movable panel are There is a problem that the backlash of the interposed reduction gear train cannot be canceled by the torsion coil spring, and the play of the movable panel in the standing posture cannot be suppressed.

  The present invention has been made in view of the actual situation of the prior art, and its purpose is for in-vehicle use that can surely prevent backlash due to backlash of a movable panel in a standing posture or depression due to a pressing operation. To provide electronic equipment.

  The present invention relates to an in-vehicle electronic device in which a movable panel rotates between a tilted posture and a standing posture by rotating a reduction gear train using a motor as a drive source, and the movable panel exceeds 90 degrees from the tilted posture. A spring member that further biases the movable panel in the standing direction when it is rotated to the maximum standing angle is provided.

  The vehicle-mounted electronic device of the present invention is provided with a spring member that further biases the movable panel in the standing direction when the movable panel is rotated from the tilted posture to the maximum standing angle exceeding 90 degrees. When stopping at any standing posture exceeding 90 degrees, not only can the backlash of the reduction gear train be canceled by the spring load of the spring member to suppress backlash of the movable panel, Even when the touch panel attached to the display screen is pressed, the operation direction and the biasing direction of the spring member are the same, so that the movable panel can be prevented from sinking in the pressing direction due to the operation force of the user.

  The present invention includes a movable panel having a display screen, a slide member that rotatably supports the movable panel, a motor mounted on the slide member, and the motor and the movable panel. In the in-vehicle electronic device comprising a reduction gear train, wherein the movable panel rotates between a tilting posture and a standing posture in front of the main body device by rotationally driving the reduction gear train with the motor as a drive source. A spring member for urging the movable panel in the standing direction is provided, and when the movable panel is rotated from a tilted posture to a maximum standing angle exceeding 90 degrees, the spring member further urges the movable panel in the standing direction. Configured to do.

  In the on-vehicle electronic device configured as described above, when the movable panel rotates 90 degrees or more using the motor as a drive source and stops in an arbitrary standing posture, the spring member further attaches the movable panel in the standing direction. Therefore, not only can the backlash of the reduction gear train be canceled by the spring load of the spring member to suppress the backlash of the movable panel, but the user, for example, presses the touch panel attached to the display screen. Even in this case, since the operation direction is the same as the biasing direction of the spring member, it is possible to prevent the movable panel from sinking in the pressing direction due to the operation force of the user.

  In the above configuration, when the movable panel is in a tilted position, when the motor terminals are shorted to be in the motor locked state, the movable panel is lifted in the standing direction by the spring load of the spring member that is maximized in the tilted position of the movable panel. This is preferable because it can be prevented.

  In the above configuration, the spring member is a torsion coil spring. The winding portion of the torsion coil spring is attached to the rotating shaft of the movable panel, and both arms of the torsion coil spring are hooked on the movable panel and the slide member. It is preferable to stop. In this case, the bracket having the shaft portion is fixed to the movable panel, and the shaft portion is arranged coaxially with the rotation axis of the movable panel, and the winding portion of the torsion coil spring is wound around the shaft portion of the bracket. Then, it can be easily incorporated in a state where a desired spring load is applied to the torsion coil spring, which is preferable.

  The embodiment will be described with reference to the drawings. FIG. 1 is a side view of an in-vehicle electronic device showing a state in which the movable panel is stopped at the maximum standing angle, and FIG. 2 is an in-vehicle electronic device showing a state in which the movable panel is upright. 3 is a side view of the in-vehicle electronic device showing a state in which the movable panel protrudes, FIG. 4 is a plan view of the in-vehicle electronic device in a state in which the movable panel protrudes, and FIG. FIG. 6 is a perspective view of the slide member provided in the in-vehicle electronic device as viewed from the back side, FIG. 7 is an exploded perspective view of the bracket and the torsion coil spring, and FIG. FIG. 9 is an explanatory view showing a procedure for incorporating the bracket and the torsion coil spring into the movable panel, and FIG. 9 is an exploded perspective view of the in-vehicle electronic device showing the movable panel.

  In these drawings, reference numeral 1 denotes a main body device that forms an outer casing of an in-vehicle electronic device, and the main body device 1 includes a box-shaped chassis 2 and a decorative member 3 integrated at a front end thereof. The interior of the main unit 1 is divided into two upper and lower stages, and a movable panel 4 and the like which will be described later are stored on the upper side, and a disc player 5 and the like are stored on the lower side. In addition, the main body device 1 is installed in an appropriate location in the vehicle located below the line of sight of the user (passenger), for example, in a recess in the instrument panel.

  As shown in FIG. 4, a pair of racks 6 are fixed to both sides of the chassis 2, and these racks 6 extend in the front-rear direction in parallel to each other. A slide base (slide member) 7 is disposed in the chassis 2 so as to be able to move forward and backward. A movable panel 4 is rotatably supported at the front end of the slide base 7. On the back surface of the movable panel 4, a touch panel type display screen 8 in which a transparent touch panel is superimposed on the front surface of the LCD is disposed. A first motor 9 and a second motor 10 are mounted on the slide base 7, and the slide base 7 is moved in the front-rear direction of the main body device 1 by a first power transmission mechanism using the first motor 9 as a drive source. It is reciprocated. Further, the movable panel 4 is rotated between a horizontal (tilted) state and a standing state by a second power transmission mechanism using the second motor 10 as a drive source, and as shown in FIG. The maximum standing angle θ is set to, for example, 105 degrees which is larger than 90 degrees.

  That is, the first power transmission mechanism has a first reduction gear train 11 that transmits the rotational force of the first motor 9 to the slide base 7, and the first stage gear of the first reduction gear train 11 is the first gear. A certain worm gear 12 is attached to the rotating shaft of the first motor 9. A worm wheel 13 of the next stage gear is engaged with the worm gear 12, and the last stage gear 11 a of the first reduction gear train 11 is fixed to a shaft 14 that is pivotally supported at the rear end portion of the slide base 7. A gear 15 that meshes with the rack 6 is fixed to both ends of the shaft 14. On the other hand, the second power transmission mechanism has a second reduction gear train 16 that transmits the rotational force of the second motor 10 to the movable panel 4, and is the first gear of the second reduction gear train 16. A certain worm gear 17 is attached to the rotation shaft of the second motor 10. The worm wheel 17 meshes with the worm wheel 18 of the next stage gear, and the final stage gear 16a of the second reduction gear train 16 meshes with the gear 19 fixed to the movable panel 4 side.

  As shown in FIGS. 6 and 9, ear pieces 7 b having holes 7 a are formed on both sides of the slide base 7, and the connecting pins 20 inserted through these holes 7 a are fixed to the movable panel 4. The movable panel 4 is rotatably supported between the both ear pieces 7b of the slide base 7 with the two connecting pins 20 as the rotation axis. Here, one connecting pin 20 is fixed to a shaft portion 21 a of a bracket 21 fixed to the movable panel 4, and the movable panel 4 is erected in a standing direction by a spring load of a torsion coil spring 22 wound around the shaft portion 21 a. A rotational force is applied. When the bracket 21 and the torsion coil spring 22 are incorporated in the movable panel 4, as shown in FIG. 7, first, the winding portion 22 a of the torsion coil spring 22 is inserted into the shaft portion 21 a of the bracket 21, and the torsion coil spring 22. Is inserted into the hole 21 b of the bracket 21. Next, as shown in FIG. 8A to FIG. 8B, the bracket 21 is fitted into the recess 4a provided in the movable panel 4, and the holes formed on one opposite side surface of the recess 4a. The front end and the rear end of the shaft portion 21a are inserted into 4b and the notch 4c, respectively. At this time, the other arm portion 22c of the torsion coil spring 22 is hooked on the movable panel 4, but the torsion coil spring 22 is incorporated in the recess 4a in a substantially unloaded state. Next, after the bracket 21 is rotated in the direction of arrow P in FIG. 8B and pressed against the movable panel 4, the bracket 21 is attached to the movable panel 4 using screws 23 as shown in FIG. 8C. Fix it. As a result, one arm portion 22b of the torsion coil spring 22 rotates in the same direction together with the bracket 21 and the winding portion 22a is twisted, so that the other arm portion 22c of the torsion coil spring 22 has a spring load in the direction of arrow P. Occur.

  Then, after the bracket 21 and the torsion coil spring 22 are assembled in the movable panel 4 as described above, the movable panel 4 is inserted between the both ear pieces 7b of the slide base 7 as shown in FIG. Thus, the movable panel 4 is rotatably supported on the slide base 7. At that time, the arm portion 22c of the torsion coil spring 22 is inserted into the slide base 7 while being bent in the direction of the arrow Q opposite to the arrow P in FIG. 8C, and the tip of the arm portion 22c is inserted into the back surface of the slide base 7. It hooks on the spring receiving body 24 screwed to (see FIGS. 5 and 6). As a result, the movable panel 4 is supported while being urged in the standing direction by the spring load of the torsion coil spring 22 with respect to the slide base 7, and the movable panel 4 is rotated to the maximum standing angle θ as shown in FIG. Then, the torsion coil spring 22 urges the movable panel 4 further in the standing direction (in the direction of arrow Q in the figure).

  Next, the operation of the in-vehicle electronic device configured as described above will be described.

  In the closed state in which the movable panel 4 is housed inside the main body device 1, the gears 15 at both ends of the shaft 14 are engaged with the rear end portions of the rack 6 fixed to the main body device 1, and the slide base 7 is The movable panel 4 is in a horizontal state with respect to the slide base 7 at the retracted position in the main unit 1. When an unillustrated open button is turned on in such a closed state, the first motor 9 rotates in one direction, and the rotational force is transmitted from the worm gear 12 through the worm wheel 13 to the final stage gear of the first reduction gear train 11. Since this is transmitted to 11a, the gear 11a and the shaft 14 rotate integrally. As a result, the gears 15 at both ends of the shaft 14 move from the rear end portion of the rack 6 to the front end portion side, so that the slide base 7 moves forward from the retracted position in the main unit 1 as shown in FIGS. The movable panel 4 also moves forward while maintaining a horizontal state and protrudes to the front side of the main body device 1. At this time, the spring load of the torsion coil spring 22 is maximized, and a large force that urges the movable panel 4 in the upright direction acts from the torsion coil spring 22, but the second motor that is the drive source of the movable panel 4. 10 is short-circuited between the + terminal and the − terminal so that the motor is locked. Therefore, the torsion coil spring 22 can prevent the movable panel 4 from being lifted in the upright direction, and the main body apparatus can be kept in a horizontal state. 1 can be projected forward.

  Thus, when the movable panel 4 completely protrudes from the front surface of the main unit 1 as the slide base 7 advances, the advance operation of the movable panel 4 is stopped by a stopper (not shown) and also from a detection switch (not shown). Based on the detection signal, the rotation of the first motor 9 stops, and instead, the second motor 10 rotates in one direction. When the second motor 10 rotates in one direction, the rotational force is transmitted from the worm gear 17 through the worm wheel 18 to the final gear 16a of the second reduction gear train 16, and therefore meshes with the gear 16a. As the gear 11 rotates, the movable panel 4 rises while rotating in the direction of arrow Q in FIG. 3, and the touch panel display screen 8 on the back surface of the movable panel 4 is exposed. Then, when the movable panel 4 rises to an arbitrary standing angle set in advance, the rotation of the second motor 10 is stopped based on a detection signal from an angle detection sensor (not shown), and the movable panel 4 displays a touch panel display. Stop with the screen 8 facing the user (passenger). For example, when the preset standing angle of the movable panel 4 is 105 degrees which is the same as the maximum standing angle θ, the movable panel 4 stands up to the maximum standing angle θ as shown in FIG. Stop with the screen 8 facing the user.

  At this time, the spring load of the torsion coil spring 22 gradually decreases as the movable panel 4 rotates in the direction of the arrow Q. However, as described above, when the movable panel 4 rotates to the maximum standing angle θ. Since the torsion coil spring 22 is set so as to urge the movable panel 4 in the standing direction (arrow Q direction in the figure), the torsion coil spring is always provided to the movable panel 4 stopped at an arbitrary standing angle. A spring load in the direction of arrow Q is applied from 22. Accordingly, since the backlash of the second reduction gear train 16 is canceled by the spring load of the torsion coil spring 22, it is possible to prevent the movable panel 4 in the standing state from rattling due to external vibration from a traveling automobile or the like. . Further, when the user presses the touch panel of the display screen 8 during use, as shown in FIG. 1, the direction T in which the user presses the touch panel and the biasing direction Q of the torsion coil spring 22 are the same direction. The movable panel 4 does not sink in the pressing direction due to the operation force of the user, and the deterioration of the operation quality can be prevented.

  When a close button (not shown) is turned on in such an open state, an operation reverse to the above is executed and the closed state is entered again. That is, first, by rotating the second motor 10 in the reverse direction, the movable panel 4 is rotated in the tilting direction and its posture is returned to the horizontal state with the slide base 7, and then the first motor 9 is moved. By rotating in the reverse direction, the slide base 7 and the movable panel 4 are moved backward. In this case, the spring load of the torsion coil spring 22 gradually increases with the rotation of the movable panel 4 in the tilting direction, and the spring load of the torsion coil spring 22 is maximum when the movable panel 4 is in the horizontal position. However, at this time, the terminals of the second motor 10 are again short-circuited to be in the motor lock state, so that the movable panel 4 can be moved to the rear side of the main unit 1 while being kept in a horizontal state. Then, when the slide base 7 moves back to the back of the main body device 1, the movable panel 4 is again housed in the main body device 1 and returns to the closed state.

  In the above-described embodiment, the two-motor system in which the movable panel 4 and the slide base 7 are separately driven by the first and second motors 9 and 10 has been described. However, the movable panel 4 and the slide base 7 are used as a common motor. It is also possible to adopt a one-motor system driven by

It is a side view of the vehicle-mounted electronic device which shows the state which the movable panel stopped at the maximum standing angle. It is a perspective view of the vehicle-mounted electronic device which shows the state in which the movable panel stood up. It is a side view of the vehicle-mounted electronic device which shows the state which the movable panel protruded. It is a top view of the vehicle-mounted electronic device which shows the state which the movable panel protruded. It is explanatory drawing which shows the attachment state of the torsion coil spring with which this vehicle-mounted electronic device is equipped. It is the perspective view which looked at the slide member with which this in-vehicle electronic device is equipped from the back side. It is a disassembled perspective view of a bracket and a torsion coil spring. It is explanatory drawing which shows the procedure which incorporates a bracket and a torsion coil spring in a movable panel. It is a perspective view of the vehicle-mounted electronic device which decomposes | disassembles and shows a movable panel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body apparatus 2 Chassis 4 Movable panel 4a Recessed part 4b Hole 4c Notch 7 Slide base (slide member)
8 display screen 9 first motor 10 second motor 11 first reduction gear train 16 second reduction gear train 20 connecting pin 21 bracket 21a shaft portion 21b hole 22 torsion coil spring 22a winding portion 22b, 22c arm portion

Claims (5)

A movable panel having a display screen; a slide member that rotatably supports the movable panel; a motor mounted on the slide member; and a reduction gear train interposed between the motor and the movable panel; In the vehicle-mounted electronic device in which the movable panel rotates between the tilting posture and the standing posture in front of the main body device by rotationally driving the reduction gear train using the motor as a drive source,
A spring member for urging the movable panel in the standing direction is provided, and when the movable panel is rotated from a tilted posture to a maximum standing angle exceeding 90 degrees, the spring member further urges the movable panel in the standing direction. An in-vehicle electronic device characterized by that.   The in-vehicle electronic device according to claim 1, wherein the display screen has a touch panel on a front surface thereof.   3. The in-vehicle electronic device according to claim 1, wherein when the movable panel is in a tilted posture, the motor terminals are short-circuited to be in a motor lock state.   4. The method according to claim 1, wherein the spring member is a torsion coil spring, and a winding portion of the torsion coil spring is attached to the rotating shaft of the movable panel, and both the torsion coil springs are installed. An in-vehicle electronic device, wherein an arm portion is hooked on the movable panel and the slide member. 5. The bracket according to claim 4, wherein a bracket having a shaft portion is fixed to the movable panel, the shaft portion is disposed coaxially with a rotating shaft of the movable panel, and a winding portion of the torsion coil spring is disposed on the shaft portion. An in-vehicle electronic device characterized by being wound around.

Images