JP2008055926A - Lifting mechanism for on-vehicle display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lifting mechanism for an on-vehicle display device having a new structure. <P>SOLUTION: A supporting column 20 to which a display device 10 is rotatably coupled through a hinge portion 21 provided at an upper end portion, is lifted by a first lifting mechanism 30. A bracket 40 supporting the first lifting mechanism 30 is lifted by a second lifting mechanism 50. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lifting mechanism for a vehicle-mounted display device.

For example, Patent Document 1 discloses a lifting mechanism for a display device provided in a center console unit. Specifically, a comb-like portion extending in the vehicle height direction is provided below the support portion of the display device, and the tooth-engaging portion of the driving portion is connected to the tooth-engaging portion formed in the comb-like portion. The drive unit is laid out so as to mesh with each other. In this case, when the drive unit is rotationally driven, the comb-shaped portion is moved up and down in the vehicle height direction, whereby the display device can be moved up and down.
Table 2002-096712

  However, according to the technique disclosed in Patent Document 1, the length of the comb-shaped portion can be ensured only by the height of the center console unit in the vehicle height direction. It can only be raised to about twice the height. For this reason, there is a problem that a look-down angle from a seated occupant becomes large and the display device becomes difficult to see.

  Then, this invention is providing the raising / lowering of the vehicle-mounted display apparatus which has a novel structure.

  A lifting mechanism for a vehicle-mounted display device according to claim 1 of the present invention includes a support column that extends in a vehicle height direction and is rotatably connected to a display device via a hinge portion provided at an upper end portion; A first elevating mechanism for elevating the support column in the vehicle height direction; a bracket for supporting the first elevating mechanism; and a second elevating mechanism for elevating the bracket in the vehicle height direction by the rotational force of the electric motor. is doing.

  In the lifting mechanism of the in-vehicle display device according to the second aspect of the present invention, the first lifting mechanism is configured to mechanically transmit the lifting amount in the vehicle height direction according to the bracket, so that the support column is moved. Move up and down.

  In the lifting device for an in-vehicle display device according to claim 3 of the present invention, the first lifting mechanism includes a first shaft, a first bevel gear fixed to the first shaft, and a vehicle height direction. A first feed screw, a second bevel gear fixed to the lower end of the first feed screw, meshed with the first bevel gear, and a gear fixed to the first shaft. The gear is meshed with a straight gear provided in a case fixed to the vehicle body and extending in the vehicle height direction, and the support column is first in a hollow region extending in the axial direction. The feed screw engages.

  According to a fourth aspect of the present invention, the second elevating mechanism includes a second shaft that rotates when the rotational force of the electric motor is transmitted, and a second shaft that is fixed to the second shaft. 3 bevel gears, a second feed screw extending in the vehicle height direction, and a fourth bevel gear fixed to the lower end portion of the second feed screw and meshing with the third bevel gear. The bracket has a nut that engages with the second feed screw.

  According to the lift mechanism of the in-vehicle display device according to the first aspect of the present invention, the display device can be lifted and lowered by the first lift mechanism and the second lift mechanism, respectively, so that the lift amount can be increased. . Thereby, since it becomes possible to raise / lower a display apparatus to the position where a passenger | crew is easy to see, a user-friendly display apparatus is realizable.

  According to the lifting mechanism of the in-vehicle display device according to the second aspect of the present invention, it is not necessary to drive each of the first lifting mechanism and the second lifting mechanism by separate electric motors, so that the system configuration is simple. An elevating mechanism can be realized.

  According to the lift mechanism of the in-vehicle display device according to claim 3 of the present invention, the gear fixed to the first shaft meshes with the straight gear provided in the case and extending in the vehicle height direction. Thus, the first shaft can be rotated. Therefore, since the first feed screw rotates through the first bevel gear and the second bevel gear, the support column that is screwed to the first feed screw can be raised and lowered.

  According to the lifting mechanism of the in-vehicle display device according to claim 4 of the present invention, the second feed screw is moved via the third bevel gear and the fourth bevel gear by rotating the second shaft by the electric motor. Since it rotates, the bracket which has a nut screwed together can be raised / lowered.

  FIG. 1 is a perspective view including a console box in a vehicle compartment including an in-vehicle display device. This in-vehicle display device is suitable, for example, as a rear seat display device that displays an image such as a TV or a DVD to a passenger in the rear seat. The in-vehicle display device is laid out on the rear side in the vehicle length direction of the console box 2, and is housed in the console box 2 when not in use. Raise from box 2 and use.

  FIG. 2 is a schematic perspective view showing the display device housed in the console box 2 and the lifting mechanism 1 that lifts and lowers the display device. FIG. 3 is an exploded perspective view schematically showing the lifting mechanism 1 of the in-vehicle display device. The elevating mechanism 1 of the in-vehicle display device is mainly configured by a display device 10, a support column 20, a first elevating mechanism 30, a bracket 40, and a second elevating mechanism 50. The first elevating mechanism 30 is housed in a first case 60, and the second elevating mechanism 50 is housed in a second case 70 that is different from the first case 60. When the display device 10 is in the retracted state, the lifting mechanism 1 has a height that generally corresponds to the height of the console box 2, and the second case 70 and the first case from the front to the rear of the vehicle. 60, the display device 10 is arranged above the first case 60.

  The display device 10 includes a rectangular housing 11 and a display unit (not shown) housed inside the housing 11. A display unit display is provided on a side surface 11 a of the housing 11. Region 12 is exposed. As the display device 10, a known display device such as a liquid crystal or a CRT can be used, but it is preferable to use a display device such as a liquid crystal in consideration of downsizing and thinning of the entire device.

  The support column 20 is configured by a cylindrical member having a hollow interior and extends in the vehicle height direction (vertical direction). The support columns 20 are laid out on both the left and right sides of the display device 10, and each support column 20 is provided with a hinge portion 21 at the upper end thereof. The pair of hinge portions 21 are connected to an end portion on the bottom side of the display device 10, so that the display device 10 is rotatable with respect to the support column 20. When the display device 10 is in the housed state, the display device 10 is sandwiched between the pair of support columns 20 and the upper side is positioned downward. Further, a nut (not shown) that is screwed into a first feed screw 33 of the first elevating mechanism 30 described later is fixed to the lower end portion of each support column 20 in the hollow interior.

  The first elevating mechanism 30 has a function of elevating and lowering the pair of support columns 20 in the vehicle height direction, and includes a first shaft 31, a first bevel gear 32, a first feed screw 33, and a second Bevel gear 34 and gear 35.

  The first shaft 31 is composed of a rod-shaped member, extends in the vehicle width direction, and is supported by the first case 60 so as to be rotatable about an axis. First bevel gears 32 are respectively fixed to both ends of the first shaft 31. The first feed screws 33 are laid out in the vicinity of the first bevel gears 32 provided at both ends of the first shaft 31, and correspond to the layout positions of the support columns 20 at predetermined intervals in the vehicle width direction. Are provided apart from each other. The individual first feed screws 33 generally correspond to the height of the console box 2 in the vehicle height direction and the length thereof, extend in the vehicle height direction, and are supported so as to be rotatable about the axis. ing. The first feed screw 33 is inserted into the hollow interior of the support column 20 while being screwed with a nut inscribed in the lower end portion of the support column 20.

  Each first feed screw 33 has a second bevel gear 34 fixed to the lower end thereof. The pair of second bevel gears 34 respectively mesh with the first bevel gears 32 provided at both ends of the first shaft 31. A gear 35 is fixed to the first shaft 31. When the first lifting mechanism 30 moves up and down with respect to the second case 70 in a state where the gear 35 meshes with a gear 73 that is linearly disposed on the second case 70 described later, The shaft 31 is rotated.

  In the first elevating mechanism 30, when the first shaft 31 rotates in one direction (forward direction), this rotational force is transmitted to the first bevel gear 32 and the second bevel gear 34, respectively. Each of the pair of first feed screws 33 is rotated. When the first feed screw 33 rotates, the nut of the support column 20 that is screwed to the first feed screw 33 rises, thereby raising the pair of support columns 20 and the display device 10 connected thereto.

  On the other hand, when the first shaft 31 rotates in the other direction (reverse direction), this rotational force is transmitted to the first bevel gear 32 and the second bevel gear 34, respectively, and a pair of first bevel gears is transmitted. Each of the feed screws 33 is rotated. When the first feed screw 33 rotates, the nut of the support column 20 screwed to the first feed screw 33 is lowered, and thereby the pair of support columns 20 and the display device 10 connected thereto are lowered.

  When the display device 10 is housed, the first lifting mechanism 30 has the lower end portion of the support column 20 positioned at a predetermined position (lower limit position) on the lower end side of the first feed screw 33. Then, according to the length of the first feed screw 33, the lower end portion of the support column 20 can be raised until it reaches a predetermined position (upper limit position) on the upper end side of the first feed screw 33. Note that, due to the structure, the pair of first feed screws 33 rotate in the direction opposite to the normal direction with respect to the rotation of the first shaft 31, but in the groove direction of the pair of first feed screws 33 in advance. Can be raised or lowered in synchronism with each other.

  The bracket 40 is made of a plate material extending in the vehicle length direction, and the first case 60 accommodated in the first case 60 is sandwiched between the pair of brackets 40 from the left and right sides. 1 elevating mechanism 30 is supported. In the pair of brackets 40, nuts 41 are provided at the other ends (ends on the front side of the vehicle) to be engaged with the second feed screw 53 of the second lifting mechanism 50 described later. .

  The second elevating mechanism 50 has a function of elevating and lowering the bracket 40 that supports the first elevating mechanism 30 housed in the first case 60 in the vehicle height direction. Bevel gear 52, second feed screw 53, fourth bevel gear 54, worm gear 55, and electric motor 56.

  The second shaft 51 is composed of a rod-shaped member, extends in the vehicle width direction, and is supported so as to be rotatable about an axis. Third bevel gears 52 are fixed to both ends of the second shaft 51, respectively. The second feed screw 53 is laid out in the vicinity of the third bevel gear 52 provided at both ends of the second shaft 51, and corresponds to the layout position of the bracket 40 in the vehicle width direction at a predetermined interval. It is provided with a style separated from each other. Each of the second feed screws 53 substantially corresponds to the height in the vehicle height direction of the console box 2 and its length, extends in the vehicle height direction, and is supported so as to be rotatable about the axis. ing. The second feed screw 53 is screwed with a nut 41 provided on the bracket 40.

  Each second feed screw 53 has a fourth bevel gear 54 fixed to the lower end thereof. The pair of fourth bevel gears 54 mesh with the third bevel gears 52 provided at both ends of the second shaft 51. A worm gear 55 is fixed to the second shaft 51. The electric motor 56 is driven in response to an input of a control signal triggered by an occupant's switch operation. A worm 57 is fixed to the rotating shaft of the electric motor 56, and the electric motor 56 is laid out so that the worm 57 of the rotating shaft and the worm gear 55 fixed to the second shaft 51 mesh. Thereby, when the rotating shaft of the electric motor 56 rotates, this rotational force is transmitted to the worm 57 and the worm gear 55, respectively, and the second shaft 51 is rotated.

  In the second lifting mechanism 50, when the second shaft 51 rotates in one direction (forward direction), this rotational force is transmitted to the third bevel gear 52 and the fourth bevel gear 54, respectively. Each of the pair of second feed screws 53 is rotated. When the second feed screw 53 rotates, the nut 41 of the bracket 40 screwed with the second feed screw 53 rises, thereby raising the pair of brackets 40 and the first lifting mechanism 30 supported by them.

  On the other hand, when the second shaft 51 rotates in the other direction (reverse direction), this rotational force is transmitted to the third bevel gear 52 and the fourth bevel gear 54, respectively, and a pair of second bevel gears is transmitted. Each of the feed screws 53 is rotated. When the second feed screw 53 is rotated, the nut 41 of the bracket 40 screwed with the second feed screw 53 is lowered, and thereby the pair of brackets 40 and the first lifting mechanism 30 supported by them are lowered.

  When the display device 10 is stored, the bracket 40 is positioned at a predetermined position (lower limit position) on the lower end side of the second feed screw 53 in the second lifting mechanism 50. Then, the bracket 40 can be raised according to the length of the second feed screw 33 until the bracket 40 reaches a predetermined position (upper limit position) on the upper end side of the second feed screw 53. Note that, due to the structure, the pair of second feed screws 53 rotate in the direction opposite to the forward direction with respect to the rotation of the second shaft 51, but the groove direction of the pair of second feed screws 53 in advance. Can be raised or lowered in synchronization with each other.

  The first case 60 includes a housing 61 and a pair of column covers 62 and houses the first lifting mechanism 30. The housing 61 mainly stores the first shaft 31, the first bevel gear 32, the second bevel gear 34 and the gear 35. Although not shown in FIG. 3, an opening is formed on the side surface of the housing 61 on the second case 70 side so that a part of the gear 35 can be exposed to the outside. Further, the first feed screw 33 to which the second bevel gear 34 is fixed and the support column 20 that moves up and down along the first feed screw 33 are covered by a column cover 62. The column cover 62 covers the support column 20 to the extent that it reaches the hinge portion 21 on the upper end side of the support column 20 when the support column 20 is located at the lower limit position.

  The second case 70 includes a first casing 71 and a second casing 72 and houses the second lifting mechanism 50. The first housing 71 mainly houses the second shaft 51, the worm gear 55, and the electric motor 56. The second casing 72 mainly stores the first casing 71, the third bevel gear 52 and the fourth bevel gear 54 fixed to the second shaft 51. A straight gear 73 extending in the vehicle height direction is provided on a side surface 72a of the second casing 72 on the vehicle rear side. The gear 73 meshes with the gear 35 fixed to the first shaft 31 constituting the first elevating mechanism 30 described above, but the bracket 40 is moved from the lower limit position to the predetermined position by the second elevating mechanism 50. The length of the first shaft 31 is adjusted in advance so that the gear 35 of the first shaft 31 reaches the lowermost portion of the gear 73 when it is raised to the height position Ph.

  Hereinafter, operation | movement of the raising / lowering mechanism 1 of the vehicle-mounted display apparatus concerning this embodiment is demonstrated. When the display device 10 is not used, the lifting mechanism 1 is in a storage position in which the display device 10 is stored in the console box 2 as shown in FIGS. 1 and 2. In this storage position, the first elevating mechanism 30 and the second elevating mechanism 50 are in the state of being lowered most downward. That is, the lower end portion (specifically, the inscribed nut) of the support column 20 is positioned at the lower limit position of the first feed screw 33 in the first elevating mechanism 30, and the bracket 40 (specifically, The nut 41) is located at the lower limit position of the second feed screw 53 in the second lifting mechanism 50.

  When the occupant operates a switch (not shown) on the assumption that the display device 10 is raised, the electric motor 56 of the second lifting mechanism 50 is driven and the rotation shaft thereof is rotated. Since the worm 57 is fixed to the rotating shaft of the electric motor 56, the worm 57 also rotates in synchronization with the rotating shaft. When the worm 57 rotates, the worm gear 55 that meshes with the worm 57 rotates, so that the second shaft 51 rotates in the positive direction. When the third bevel gear 52 fixed to both ends of the second shaft 51 is rotated along with the rotation of the second shaft 51, the fourth bevel gear 54 meshed with the third bevel gear 52 is rotated, and the fourth bevel gear is rotated. A pair of second feed screws 53 to which 54 is fixed respectively rotate about the axis. A nut 41 fixed to the bracket 40 is screwed into the pair of second feed screws 53, and each pair of second feed screws 53 rotates about the axis thereof, whereby each bracket Forty nuts 41 rise synchronously, and the bracket 40 and the first lifting mechanism 30 supported by the bracket 40 rise accordingly.

  At this time, in the first elevating mechanism 30, the gear 35 fixed to the first shaft 31 does not reach the lower end of the straight gear 73 provided on the second case 70 side. The gear 35 of the first shaft 31 does not rotate. Therefore, since the first shaft 31 to which the gear 35 is fixed does not rotate, the first elevating mechanism 30 does not elevate the support column 20 and ascends while maintaining the state as it is.

  When the electric motor 56 continues to rotate, the series of operations described above continues, and the second lifting mechanism 50 raises the bracket 40. Then, at the timing when the second elevating mechanism 50 raises the bracket 40 and the gear 35 of the first shaft 31 in the first elevating mechanism 30 reaches the lowermost end of the gear 73 on the second case 70 side. The rotation of the electric motor 56 is stopped. As a result, as shown in FIG. 4A, when the raising of the bracket 40 by the second lifting mechanism 50 is stopped, the entire column cover 62 of the first case 60 is removed as shown in FIG. 4B. The amount of increase is such that it is exposed to the outside (first lifting position).

  Here, as shown in FIG. 5, when the occupant rotates the display device 10 via the hinge portion 21 at the upper end of the support column 20, the display area 12 is in a shape facing the rear seat side. In this case, the occupant can watch an image or the like displayed on the display area 12 in a state where the display device 10 is raised to the first lift position.

  On the other hand, when the occupant operates a switch (not shown) on the premise that the display device 10 is further raised in the first raising / lowering position, the electric motor 56 of the second raising / lowering mechanism 50 is driven to rotate the rotation shaft thereof. . In this case, the second lifting mechanism 50 raises the bracket 40 in accordance with the operation as described above. Here, as the bracket 40 is raised by the second lifting mechanism 50, the gear 35 on the first lifting mechanism 30 side meshes with the lower end side of the gear 73 on the second case 70 side. Further, when the bracket 40 is further raised, the gear 35 on the first elevating mechanism 30 side that meshes with the gear 73 on the second case 70 side rotates, whereby the first shaft 31 moves in the forward direction. And rotate. When the first bevel gear 32 fixed to both ends of the first shaft 31 rotates as the first shaft 31 rotates in the forward direction, the second bevel gear 34 that meshes with the first bevel gear 32 is obtained. , And the pair of first feed screws 33 to which the second bevel gears 34 are respectively fixed rotate about the axis. A nut internally inscribed at the lower end of the support column 20 is screwed into the pair of first feed screws 33, and the pair of first feed screws 53 are rotated around the axis, respectively. The nuts of the individual support columns 20 are raised synchronously, and the support column 20 and the display device 10 connected thereto are raised accordingly.

  When the electric motor 56 continues to rotate, the series of operations described above continues, the second lifting mechanism 50 lifts the bracket 40, and the first lifting mechanism 30 lifts the support column 20. Then, the first elevating mechanism 30 raises the support column 20, and the rotation of the electric motor 56 stops at the timing when the nut provided therein reaches the upper limit position of the first feed screw 33. Thereby, as shown to Fig.6 (a), the raise of the bracket 40 by the 2nd raising / lowering mechanism 50 and the raising of the support column 20 by the 1st raising / lowering mechanism 30 are stopped. At this time, the timing at which the nut provided on the support column 20 reaches the upper limit position of the first feed screw 33 and the nut 41 provided on the bracket 40 reach the upper limit position of the second feed screw 53. The number of gears and the like are adjusted so as to correspond to the arrival timing. In this case, as shown in FIG. 6B, the display device 10 raises the bracket 40 to a position where the second elevating mechanism 50 is further elevated than the first elevating position, and the first elevating mechanism. When the support column 20 is raised by 30, the lifted position reaches a further raised position (second lift position).

  Here, as shown in FIG. 7, when the occupant rotates the display device 10 via the hinge portion 21 at the upper end of the support column 20, the display region 12 looks like the rear seat side. In this case, the occupant can view an image or the like displayed on the display area 12 in a state where the display device 10 is raised to the second lift position.

  On the other hand, when the occupant operates a switch (not shown) on the assumption that the display device 10 is lowered at the second lifting position, the electric motor 56 of the second lifting mechanism 50 is driven and the rotation shaft rotates. To do. Since the worm 57 is fixed to the rotating shaft of the electric motor 56, the worm 57 also rotates in synchronization with the rotating shaft. When the worm 57 rotates, the worm gear 55 that meshes with the worm 57 rotates, so that the second shaft 51 rotates in the reverse direction. Thereby, the procedure reverse to the operation described above is followed, and the lifting mechanism 1 transitions from the second lifting position to the first lifting position.

  In addition, when the occupant operates a switch (not shown) on the assumption that the display device 10 is further lowered at the first lifting position, the electric motor 56 of the second lifting mechanism 50 is driven to rotate the rotation shaft. . Thereby, the procedure reverse to the operation described above is followed, and the lifting mechanism 1 transitions from the first lifting position to the storage position.

  Below, the effect by embodiment of this invention is demonstrated.

  The first elevating mechanism 30 and the second elevating mechanism 50 can ensure an elevating amount that is twice or more the height of the console box 2 as compared to the storage position of the display device 10. Thereby, the improvement of a passenger | crew's viewability can be aimed at.

  In addition, by adjusting the height of the lowermost end portion of the straight gear 73 provided in the second case 70, the lifting start position of the support column 20 by the first lifting mechanism 30 can be adjusted. For example, as in the present embodiment, the stage where the column cover 62 of the first case 60 is exposed from the console box 2 is set as the first lifting position, and the first lifting mechanism 30 starts to lift the support column 20 from there. By setting the position, since the support column 20 is covered with the column cover 62 in the first lift position, the appearance can be improved.

  In addition, the raising / lowering mechanism of the display apparatus for vehicles which concerns on this invention is not limited to embodiment mentioned above, A various deformation | transformation and change are possible based on the technical thought of this invention. For example, as shown in FIG. 8, the straight gear 73 laid out in the second case 70 is adjusted so that the lower end thereof meshes with the gear 35 of the first lifting mechanism 30 in the storage position. May be. In this case, as the bracket 40 starts to be lifted by the second lifting mechanism 50, the lifting of the support column 20 by the first lifting mechanism 30 starts. Even in such a case, since it is possible to secure a lifting amount that is twice or more the height of the console box 2, it is possible to improve the visibility of the passenger.

A perspective view including a console box in a vehicle compartment including a vehicle-mounted display device The schematic perspective view which shows the display apparatus of the state accommodated in the console box 2, and the raising / lowering mechanism 1 which raises / lowers this The exploded perspective view which shows the raising / lowering mechanism 1 of the vehicle-mounted display apparatus Explanatory drawing of the first lifting position Explanatory drawing explaining the state which rotated the display apparatus 10 in the 1st raising / lowering position. Explanatory drawing of the second lifting position Explanatory drawing explaining the state which rotated the display apparatus 10 in the 2nd raising / lowering position. The exploded perspective view which shows typically the modification of the raising / lowering mechanism 1 of a vehicle-mounted display apparatus

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lifting mechanism 2 Console box 5 Unexamined-Japanese-Patent No. 10 Display apparatus 11 Housing | casing 11a Side part 12 Display area 20 Support column 21 Hinge part 30 1st lifting mechanism 31 1st shaft 32 1st bevel gear 33 1st feed screw 34 Second bevel gear 35 Gear 40 Bracket 41 Nut 50 Second lifting mechanism 51 Second shaft 52 Third bevel gear 53 Second feed screw 54 Fourth bevel gear 55 Worm gear 56 Electric motor 57 Worm 60 First case 61 Case 62 Column cover 70 Second case 71 First case 72 Second case 72a Side surface 73 Gear

Claims (4)

In the lifting mechanism of the in-vehicle display device,
A support column (20) extending in the vehicle height direction and rotatably connected to a display device (10) via a hinge portion (21) provided at an upper end portion;
A first elevating mechanism (30) for elevating the support column (20) in the vehicle height direction;
A bracket (40) for supporting the first lifting mechanism (30);
An elevating mechanism for an in-vehicle display device, comprising: a second elevating mechanism (50) that elevates and lowers the bracket (40) in the vehicle height direction by the rotational force of the electric motor (56).   The first elevating mechanism (30) elevates and lowers the support column (20) by mechanically transmitting the elevating amount in the vehicle height direction according to the bracket (40). The raising / lowering mechanism of the vehicle-mounted display apparatus described in Claim 1. The first lifting mechanism (30)
A first shaft (31);
A first bevel gear (32) secured to the first shaft (31);
A first lead screw (33) extending in the vehicle height direction;
A second bevel gear (34) fixed to the lower end of the first feed screw (33) and meshing with the first bevel gear (32);
A gear (35) secured to the first shaft (31);
The gear (35) meshes with a straight gear (73) provided in a case (70) fixed to the vehicle body and extending in the vehicle height direction,
3. The on-vehicle display device according to claim 1, wherein the support column (20) has the first feed screw (33) screwed into a hollow region extending in an axial direction. Elevating mechanism. The second lifting mechanism (50)
A second shaft (51) rotated by the rotational force of the electric motor (56) being transmitted;
A third bevel gear (52) secured to the second shaft (51);
A second lead screw (53) extending in the vehicle height direction;
A fourth bevel gear (54) fixed to the lower end of the second feed screw (53) and meshing with the third bevel gear (52);
The bracket (40)
The raising / lowering mechanism of the vehicle-mounted display apparatus as described in any one of Claim 1 to 3 which has a nut (41) screwed together with the said 2nd feed screw (53).

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