CN111071167A - Flip device for in-vehicle display - Google Patents

Abstract

The invention discloses a turning device of a vehicle-mounted display, which comprises two frame bodies, an eccentric part, a movable part and an elastic mechanism. The two frame bodies are an installation frame and a connecting frame respectively, and a rotating part and a rotating frame part are respectively provided on the two frame bodies, and the rotating part and the rotating frame part can rotate relative to each other. The eccentric part and the rotating part are relatively fixed, and the eccentric part is arranged eccentrically with respect to the relative rotation axis of the rotating part and the rotating frame part; the movable part and the rotating frame part can be relatively movable; the elastic mechanism is connected to the movable part and the elastic mechanism can generate The elastic force applied to the movable part, under the action of the elastic force, the movable part and the eccentric part are in contact and the eccentric part is also subjected to the force exerted by the movable part. It can instantly offset the gravitational moment generated by the gravity of the display panel and the pallet to protect the motor.

Description

Turning device of vehicle-mounted display

Technical Field

The invention relates to a component of a vehicle-mounted display, in particular to a turnover device of the vehicle-mounted display.

Background

The conventional vehicle-mounted display is usually mounted on a ceiling of a vehicle, and in order to reduce an occupied space in the vehicle, a display such as a liquid crystal display (hereinafter, referred to as a display panel) is mounted on a turning device. The turnover device has a mounting frame fixed on the roof of the vehicle, a flat plate frame installed on the back of the display plate, and the flat plate frame of the turnover device is normally turned upwards to be folded, so that the display surface of the display plate is attached to the roof in the vehicle. In use, the pallet of the flipping unit is flipped down to erect or nearly erect the display panel (explained below in an erect state).

In a typical turnover device, a rotating frame is provided on each of right and left sides of one edge of a pallet. The two rotating frames are respectively pivoted with a transverse short shaft fixedly connected with the corresponding end of the mounting frame. The worm gear speed reducing motor (hereinafter referred to as speed reducing motor) is fixed on the pallet, and an output shaft of the worm gear speed reducing motor is connected with a right short shaft (generally referred to as a right fixed shaft) on the right rotating frame through a coupling.

When the speed reducing motor is started in the forward direction, the output shaft of the speed reducing motor is connected with the right fixed shaft through the coupler, the right fixed shaft cannot rotate relative to the mounting frame, and only the speed reducing motor body pushes the flat plate frame and the right rotating frame to turn downwards (for example, turn clockwise) relative to the output shaft of the speed reducing motor and the right fixed shaft, and meanwhile, the left rotating frame on the left side of the flat plate frame also turns downwards relative to a short shaft (generally called as a left fixed shaft) on the left end of the mounting frame until the display panel is erected. The speed reducing motor is started reversely, and the output shaft of the speed reducing motor is connected with the right fixed shaft through the coupler, so that the speed reducing motor does not rotate relative to the mounting frame, the speed reducing motor body only can push the flat plate frame and the right rotating frame to turn upwards (for example, turn anticlockwise) relative to the mounting frame and the right fixed shaft, and meanwhile, the left rotating frame on the left side of the flat plate frame also turns upwards relative to the short shaft at the end head on the left side of the mounting frame until the display panel returns to the horizontal state.

At ordinary times, the display panel and the pallet are attached to the roof of the vehicle and are in a horizontal state, the gravity centers of the display panel and the pallet are far away from the left fixing shaft and the right fixing shaft on the mounting frame, and the display panel and the pallet are kept approximately horizontal by resisting downward turning moment generated by the gravity of the display panel and the pallet by means of locking moment of a worm gear in a speed reducing motor. However, when the vehicle bumps during running, the display panel and the pallet are subjected to rapid acceleration impact, and once the impact is superposed with the gravity moment of the display panel and the pallet and exceeds the locking moment of the worm gear in the speed reduction motor, the damage of the worm gear can be caused.

Disclosure of Invention

The invention aims to provide a turnover device of a vehicle-mounted display, which can timely counteract the gravity moment generated by the gravity of a display panel and a plate frame and protect a speed reducing motor.

The technical scheme adopted by the invention for solving the technical problem is as follows: the turning device of the vehicle-mounted display comprises two frame bodies, wherein the two frame bodies are respectively an installation frame and a connecting frame, the two frame bodies are respectively provided with a rotating part and a rotating frame part, and the rotating part and the rotating frame part can rotate relatively; the device also comprises an eccentric part, a movable part and an elastic mechanism; the eccentric part and the rotating part are relatively fixed, and the eccentric part is eccentrically arranged relative to the rotating axis of the rotating part and the rotating frame part; the movable part and the rotating frame part can move relatively; the elastic mechanism is connected with the movable part and can generate elastic force applied to the movable part, the movable part is in contact with the eccentric part under the action of the elastic force, and the eccentric part is also subjected to acting force applied by the movable part.

In one embodiment: the movable part and the rotating frame part can slide relatively, so that the movable part forms a sliding part; the elastic force generated by the elastic mechanism is pulling force, and the movable part is pulled and pressed against the contact eccentric part to apply acting force to the eccentric part; the movable portion has a contact portion abutting against the eccentric portion.

In one embodiment: the movable part is provided with a penetrating part, the penetrating part is provided with an inner wall, the inner wall is provided with the contact part, the eccentric part is at least partially positioned in the penetrating part, the contact part is in contact with the eccentric part, and the contact part is pressed against the contact eccentric part under the action of tensile force generated by the elastic mechanism.

In one embodiment: the movable part comprises an acting plate, the acting plate is provided with the contact part, the contact part is contacted with the eccentric part, and the contact part is pressed against the eccentric part under the action of the pulling force generated by the elastic mechanism.

In one embodiment: the movable part comprises a sliding block and the acting plate which are fixedly connected, the sliding block and the rotating frame part can slide relatively, and the acting plate and the sliding block are arranged in an intersecting mode.

In one embodiment: the movable part and the rotating frame part can slide relatively, and the movable part forms a sliding part; the elastic force generated by the elastic mechanism is a thrust force, and the movable part receives the thrust force and abuts against and contacts the eccentric part to apply an acting force to the eccentric part; the movable portion has a contact portion abutting against the eccentric portion.

In one embodiment: the eccentric part comprises an eccentric part and a roller sleeve which can be sleeved outside the eccentric part in a rolling way, and the movable part is in contact with the roller sleeve and acts on the peripheral wall of the roller sleeve under the action of the force exerted by the movable part.

In one embodiment: the sliding direction of the movable part is vertically crossed with the rotating axis of the rotating part.

In one embodiment: the rack body provided with the rotating part is a first rack body, and the rack body provided with the rotating rack part is a second rack body; the elastic mechanism is provided with a first end and a second end connected with the movable part, and the first end of the elastic mechanism is connected with the second frame body.

In one embodiment: the rack body provided with the rotating part is a first rack body, and the rack body provided with the rotating rack part is a second rack body; the first support body is an installation frame, and the second support body is a connecting frame.

In one embodiment: the rack body provided with the rotating part is a first rack body, and the rack body provided with the rotating rack part is a second rack body; the first support body is a connecting frame, and the second support body is an installation frame.

In one embodiment: the elastic mechanism has a first end and a second end connected to the movable portion, the first end of the elastic mechanism being connected to the rotating frame portion.

In one embodiment: the movable part is provided with a connecting seat, and the rotating frame part is provided with a spring seat; the elastic mechanism comprises a spring, one end of the spring is connected to the spring seat, and the other end of the spring is connected to the connecting seat.

In one embodiment: the rotating frame part comprises a rotating frame and a fixed connection seat fixedly connected to the rotating frame, and the fixed connection seat is provided with the spring seat; the movable part comprises a sliding block, the rotating frame part is provided with a sliding groove, and the sliding block is connected to the sliding groove in an adaptive mode; the rotating frame is provided with two sides which are arranged on the front and back, the guide groove is positioned on one side, the other side is provided with a connecting structure, and the fixedly connected seat is matched and fixedly connected with the connecting structure.

In one embodiment: the guide slot is located the positive side of swivel mount, the dorsal part of swivel mount is equipped with foretell connection structure, just, the swivel mount back flushes with the rigid coupling seat back.

In one embodiment: the rigid coupling seat is equipped with the holding chamber, the spring is located the holding intracavity.

In one embodiment: the movable part is provided with a guide rod which is connected in a guide groove arranged on the rotating frame part in a sliding way; the movable part is provided with a first end part and a second end part, the first end part is provided with the contact part, and the second end part is provided with a connecting seat; the elastic mechanism is provided with a first end and a second end connected with the movable part, and the second end of the elastic mechanism is connected with the connecting seat.

In one embodiment: the rack body provided with the rotating part is a first rack body, and the rack body provided with the rotating rack part is a second rack body; the rotating part at least partially extends out of the side wall of the first frame body, and the rotating frame part is located on the side of the second frame body.

In one embodiment: the rotating part comprises a fixed shaft fixedly connected to the first frame body and an eccentric disc fixedly connected to the fixed shaft, the eccentric part comprises an eccentric part fixedly arranged on the eccentric disc, and the axis of the fixed shaft is superposed with the rotating axis of the rotating part; the rotating frame part comprises a rotating frame and a guide groove which are fixedly connected together, the movable part is provided with a sliding block, the sliding block is provided with a guide rod, the guide rod is connected in the guide groove in a sliding manner, and the lower end of the sliding block is provided with a connecting seat; the rotating frame part is provided with a spring seat; the upper end of the elastic mechanism is connected with the connecting seat at the lower end of the sliding block, and the lower end of the elastic mechanism is connected with the spring seat; the guide groove and the spring seat are sequentially arranged below the eccentric disc.

In one embodiment: the rotating part comprises a fixed shaft fixedly connected to the first frame body and an eccentric disc fixedly connected to the fixed shaft, the eccentric part comprises an eccentric part fixedly arranged on the eccentric disc, and the axis of the fixed shaft is superposed with the rotating axis of the rotating part; the rotating frame part comprises a rotating frame and a guide groove which are fixedly connected together, the movable part is provided with a sliding block, the middle part of the sliding block is provided with a guide rod, the guide rod is connected in the guide groove in a sliding way, and the lower end of the sliding block is provided with a connecting seat; the rotating frame part is provided with a spring seat; the lower end of the elastic mechanism is connected with the connecting seat at the lower end of the sliding block, and the upper end of the elastic mechanism is connected with the spring seat; the guide groove and the spring seat are sequentially arranged below the eccentric disc.

In one embodiment: still include actuating mechanism, actuating mechanism installs and connects the mounting bracket at link and transmission.

In one embodiment: still include actuating mechanism, actuating mechanism installs at the mounting bracket and the transmission connection link.

In one embodiment: the gravity balance mechanism comprises the rotating part, a rotating frame part, an eccentric part, a movable part and an elastic mechanism; the gravity balance mechanism and the driving mechanism are respectively arranged on two sides of the connecting frame.

In one embodiment: the rotating part comprises a fixed shaft fixedly connected to the first frame body and an eccentric disc fixedly connected to the fixed shaft, the eccentric part comprises an eccentric part fixedly arranged on the eccentric disc, and the axis of the fixed shaft is superposed with the rotating axis of the rotating part; the rotating frame part comprises a rotating frame and a guide groove which are fixedly connected together, the movable part is provided with a sliding block, the middle part of the sliding block is provided with a guide rod, the guide rod is connected in the guide groove in a sliding way, and the lower end of the sliding block is provided with a connecting seat; a spring seat is arranged on the fixed frame connected with the rotating frame part; the lower end of the elastic mechanism is connected with the connecting seat at the lower end of the sliding block, and the upper end of the elastic mechanism is connected with the spring seat; the guide groove and the spring seat are sequentially arranged below the eccentric disc.

Compared with the background technology, the technical scheme has the following advantages:

the turnover device also comprises an eccentric part, a movable part and an elastic mechanism, wherein the elastic mechanism generates elastic force applied to the movable part, the movable part is contacted with the eccentric part under the action of the elastic force, the eccentric part is also subjected to acting force applied by the movable part, the eccentric part directly receives reverse moment opposite to the gravity moment generated by the gravity of the display and the connecting frame, or the eccentric part applies reaction force to the movable part, the reaction force generates reverse moment opposite to the gravity moment generated by the gravity of the display and the connecting frame, and the reverse moment can counteract the negative action of the gravity moment on the driving mechanism, so that the aim of protecting the driving motor is fulfilled. The anti-bumping and anti-impact capability of the whole display turnover device can be improved. Since it allows the load on the drive mechanism to be significantly reduced, the designer can choose a drive source of smaller power and size, such as a smaller gearmotor.

The property of relative movement between the eccentric pin and the pressure plate is changed from sliding friction to rolling friction by utilizing the roller sleeve, so that the reliability of the system can be effectively improved, and the service life of the system can be effectively prolonged.

The elastic force generated by the elastic mechanism is pulling force, the movable part is pulled and pressed against and contacts the eccentric part, so that the pulling force generated by the elastic mechanism is transmitted to the eccentric part through the movable part, namely, the movable part applies acting force to the eccentric part, and the structure is compact and simple.

The eccentric part is at least partially positioned in the penetrating part, and the contact part is in contact with the eccentric part, so that the structure is further simplified, and the structure is more compact.

The first end of the elastic mechanism is connected to the second frame body, and connection, structural design and layout are facilitated.

The first end of the elastic mechanism is connected with the rotating frame part, so that the structure is more compact.

Drawings

The invention is further described with reference to the following figures and detailed description.

Fig. 1 is a schematic perspective view illustrating a turning device of an on-vehicle display according to an embodiment.

Fig. 2 is a schematic structural diagram of a driving mechanism of a flipping mechanism of an embodiment of a vehicle-mounted display.

Fig. 3 is a schematic perspective exploded view of a driving assembly according to an embodiment.

Fig. 4 is a schematic perspective view illustrating a gravity balance mechanism of a flip device of an on-board display according to an embodiment of the invention.

Fig. 5 is a schematic perspective exploded view of a gravity balance mechanism according to an embodiment.

Fig. 6 is a schematic structural diagram of a gravity balance mechanism in a display panel retracted state according to an embodiment.

Fig. 6-1 is a partially enlarged view of portion a in fig. 6.

Fig. 7 is a schematic perspective view of a flip device of the two-vehicle display according to the embodiment.

Fig. 8 is a schematic perspective view illustrating a gravity balance mechanism of the flip device of the two-vehicle display according to the embodiment.

Fig. 9 is a schematic perspective exploded view of the gravity balance mechanism according to the embodiment.

Fig. 10 is a schematic perspective view of a turning device of a three-vehicle display according to an embodiment.

Fig. 11 is a schematic perspective exploded view of the triple-force balance mechanism according to the embodiment.

Fig. 12 is a schematic perspective view of a triple-force balance mechanism according to an embodiment.

Fig. 13 is a schematic perspective exploded view of the quadruple-gravity balance mechanism according to the embodiment.

Fig. 14 is a schematic perspective exploded view of the five-gravity balance mechanism according to the embodiment.

Fig. 15 is a schematic perspective view of a six-gravity balance mechanism according to an embodiment.

Fig. 16 is a schematic perspective exploded view of a six-gravity balance mechanism according to an embodiment.

Fig. 17 is a schematic perspective view of a seven-gravity balance mechanism according to an embodiment.

Fig. 18 is a schematic perspective view of an eight-gravity balance mechanism according to an embodiment.

Fig. 19 is a schematic perspective exploded view of an eight-gravity balance mechanism according to an embodiment.

Fig. 20 is a schematic perspective view of the nine gravity balance mechanism according to the embodiment.

Fig. 21 is a schematic perspective exploded view of the nine gravity balance mechanism according to the embodiment.

Fig. 22 is a schematic perspective view of the embodiment of the ten-gravity balance mechanism.

Fig. 23 is a schematic perspective exploded view of the ten-gravity balance mechanism according to the embodiment.

Detailed Description

Example one

Please refer to fig. 1 for a turning device of a vehicle-mounted display according to a first embodiment. The turning device comprises a connecting frame, such as a pallet 1, and a mounting frame 2. The pallet 1 is connected, e.g. fastened, to the back of a display board (not shown in fig. 1).

The mounting frame 2 is fixed on the roof of the vehicle, and the left end and the right end of the mounting frame are respectively provided with a right lug 21 and a left lug 22 which extend downwards. A left rotating frame part, a driving mechanism and a right rotating frame part are sequentially and fixedly mounted on one side of the flat frame 1 close to the mounting frame 2, the left rotating frame part comprises a left rotating frame 61, and the right rotating frame part comprises a right rotating frame 51.

The driving mechanism is arranged on the connecting frame and is in transmission connection with the mounting frame 2, if the driving mechanism comprises a speed reducing motor 3, an output shaft 31 of the speed reducing motor 3 is coaxially connected with a right fixed shaft 52 which is sleeved on a right rotating frame 51 through a clutch 4, and the clutch 4 is connected with the motor and the right fixed shaft 52 to play a role in controlling the output torque of the motor and idling to protect the motor from being damaged when the load is overlarge. The right end of the right fixed shaft 52 is non-rotatably connected to the right lug 21 of the mounting bracket 2 via a right flange 53. The left fixed shaft 62 is sleeved on the left rotating frame 61, and the left end of the left fixed shaft 62 is connected with the left lug 22 of the mounting frame 2 in a non-rotatable manner through the left flange 63. The left fixed shaft 62 is coaxial with the right fixed shaft 52 and forms a rotation axis for the pallet 1 to turn relative to the mounting frame 2. The right rotating frame 51 is provided with an angle switch 8, and the angle switch 8 provides an angle signal for relative rotation between the right rotating frame 51 and the right fixed shaft 52.

Referring to fig. 2 and 3, the reduction motor 3, the clutch 4, the right rotating frame 51, the right fixed shaft 52, and the like constitute a driving assembly in this embodiment. The specific structure of the clutch 4 includes, for example, a center shaft 41, a plurality of C-shaped friction plates 42, and an outer sleeve 43. The middle shaft 41 is arranged on the right end face of the output shaft 31 of the speed reducing motor 3, and each C-shaped friction plate 42 is sleeved on the middle shaft 41 in a penetrating mode. Because the inner hole 421 of the C-shaped friction plate 42 is an elliptical hole, the outer peripheral surface of the center shaft 41 is in contact with the surface of the inner hole 421 of any one of the C-shaped friction plates 42, the opening 422 of the C-shaped friction plate 42 enables the C-shaped friction plate 42 to be slightly opened when the center shaft 41 is inserted into the inner hole 421, so that a certain holding force is applied to the center shaft 41, the outer sleeve 43 covers the periphery of each C-shaped friction plate 42, and the convex points 423 on the outer periphery of each C-shaped friction plate 42 are clamped in the clamping grooves 421 on the. The right end of the outer sleeve 43 is integrally connected to the left end of the right fixed shaft 52. In this embodiment, only one specific structure of the clutch is illustrated, and clutches of other structures may be adopted to connect the motor and the fixed shaft as required. In the clutch, the output torque of the speed reducing motor is controlled by utilizing the holding force exerted by each C-shaped friction plate on the middle shaft, and once the load is overlarge, each C-shaped friction plate slips relative to the middle shaft, so that the speed reducing motor is protected from being damaged. Compared with the traditional clutch using a plurality of dynamic and static friction plates, the clutch with a plurality of C-shaped friction plates has the advantages of simpler and more compact structure, easy assembly and low manufacturing cost.

The corner switch 8 comprises a bottom plate 81, a first microswitch 82, a second microswitch 83 and an angle limiting block 84. The first and second micro switches 82 and 83 are installed side by side on the left side portion of the lower surface of the base plate 81. The angle limiting block 84 is sleeved on the right fixing shaft 52. An inner hole 841 of the angle limiting block 84 is in static fit with the right fixed shaft 52, and a C-shaped first limiting groove 842 and a C-shaped second limiting groove 843 are respectively formed in the middle part and the right side of the periphery of the angle limiting block 84 corresponding to a contact of the first microswitch 82 and a contact of the second microswitch 83; the left end of the angular stopper 84 is provided with a platform 844 facing each other along the outer peripheral surface.

The shaft hole 511 of the right rotating frame 51 is provided with a third bearing 512 and a fourth bearing 513, and the right fixed shaft 52 is inserted into the inner holes of the two bearings 512 and 513. The right end of the right fixed shaft 52 is provided with a platform 521 along the outer circumference, the center hole 531 of the right flange 53 is an oblong hole, and the right end of the right fixed shaft 52 is tightly inserted into the center hole 531 of the right flange 53. The position relationship between the two limit grooves on the angle limit block 84 and the contacts of the two micro switches 82 and 83 is adjusted by the platform 521 at the left end part of the angle limit block 84 of the angle switch 8, so that the two limit grooves and the contacts are matched with each other, and then the right side part of the bottom plate 81 of the angle switch 8 is fixed on the right rotating frame 51. The right flange 53 is secured to the left side of the right lug 21 of the mounting bracket 2 by several screws.

Referring to fig. 4 and 5, the left flange 63, the spring seat 77, the left rotating frame portion, the rotating portion, the eccentric portion, the sliding portion, the elastic mechanism, and the like constitute the gravity balance mechanism in this embodiment. The left rotating frame part comprises a left rotating frame 61, a guide block 75 and a cover plate 78; the rotating part includes a left fixed shaft 62 and an eccentric disc 71; the eccentric portion includes an eccentric portion including an eccentric pin 72 and a roller 73; the slide portion includes a slider 74; the resilient means comprises a spring, which is a tension spring 76. In this embodiment, the additional parts are disposed on the same surface of the flat frame together with the rotating frame part, which is advantageous for controlling the thickness of the entire display turnover device (this effect is particularly significant when a plurality of tension springs are used in parallel), so as to meet the current market demand for thinning.

The first bearing 613 and the second bearing 614 are mounted in the shaft hole 611 of the left rotating frame 61 on the side close to the mounting frame 2, and the left fixing shaft 62 is inserted into the inner holes of the two bearings 613 and 614. The left end of the left fixed shaft 62 is provided with a platform 621 along the outer circumference, the center hole 631 of the left flange 63 is an oblong hole, and the left end of the left fixed shaft 62 is fittingly and tightly inserted into the center hole 631 of the left flange 63. The eccentric disc 71 is fixedly mounted on the right end of the left fixed shaft 62, and an eccentric pin 72 extending rightward is fixedly mounted on the right end surface of the eccentric disc 71 on the side (upper side) close to the mounting bracket 2, that is, the eccentric pin 72 is eccentrically disposed with respect to the axis of the left fixed shaft 62 and eccentrically disposed with respect to the relative rotation axis of the left fixed shaft and the left rotating bracket portion, and the axis of the left fixed shaft and the relative rotation axis coincide. The diameter of the eccentric disc 71 is larger than that of the left fixed shaft 62 to increase the distance of the eccentric pin 72 from the axial center of the left fixed shaft 62.

The guide block 75 is mounted on the right side surface of the left rotating frame 61 on the side away from the mounting frame 2. The guide block 75 has a longitudinal guide groove 751 formed on the right side surface thereof. The middle of the sliding block 74 is a strip-shaped guide rod 741, the upper end of the guide rod 741 is fixedly provided with an acting plate extending leftward, the acting plate is a pressing plate 742, the pressing plate 742 is provided with a contact part, the lower end of the guide rod 741 is provided with a connecting seat, and the connecting seat is a clamping jaw 743. The pressing plate 742 at the upper end of the slider 74 is perpendicular to the guide rod 741. The guide rod 741 of the slider 74 is slidably fitted in the guide groove 751 of the guide block 75, and the cover plate 78 covers the right end face of the guide block 75, so that the slider 74 is restricted from sliding up and down relative to the guide block 75. The upper ends of three tension springs 76 arranged side by side are respectively connected to the claws 743 of the lower end of the slider 74, and the lower ends thereof are respectively connected to spring seats 77 fixed to the pallet 1. The three tension springs 76 pull the slider 74 downward, pressing against the outer peripheral surface of the roller 73 on the eccentric pin 72 at the contact portion of the pressing plate 74 of the lower slider 74 used for the pulling force, to apply the pulling force to the eccentric portion. Wherein the guide block, the connection seat, the spring and the spring seat are sequentially disposed under the eccentric pin 72.

The side of the eccentric disc close to the mounting frame is fixedly provided with the eccentric pin, the pressing plate at the upper end of the sliding block is perpendicular to the guide rod, and the pressing plate is bent leftwards.

When the gear motor 3 is started in the forward direction, because the output shaft 31 of the gear motor is connected with the right fixed shaft 52 through the clutch 4, and the right fixed shaft 52 cannot rotate relative to the mounting frame 2, only the body of the gear motor 3 can push the pallet 1 and the right rotating frame 51 to turn downward (for example, turn clockwise) relative to the gear motor output shaft 31 and the right fixed shaft 52, and at the same time, the left rotating frame 62 on the left side of the pallet 1 also turns downward relative to the left fixed shaft 52 at the left end of the mounting frame 2 until the contact of the first microswitch 82 in the corner switch 8 touches the rear vertical wall of the first limiting groove 842 of the angle limiting block 84, the first microswitch 82 sends out a power-off signal, so that the gear motor 3 stops rotating, and the display panel 9 stops at the vertical.

The speed reducing motor 3 is started reversely, because the output shaft 31 of the speed reducing motor is connected with the right fixed shaft 52 through the clutch 4, the speed reducing motor does not rotate relative to the mounting frame 2, and only the speed reducing motor 3 body can push the flat rack 1 and the right rotating rack 51 to turn upwards (for example, turn anticlockwise) relative to the mounting frame 2 and the right fixed shaft 52, meanwhile, the left rotating rack 61 on the left side of the flat rack 1 also turns upwards relative to the left fixed shaft 62 on the left end head of the mounting frame 2 until the contact of the second microswitch 83 in the corner switch 8 touches the front vertical wall of the second limiting groove 843 of the angle limiting block 84, the second microswitch 83 sends a power-off signal, so that the speed reducing motor 3 stops rotating, and the display panel 9 returns to a horizontal state.

When the speed reducing motor 3 runs and the display panel 9 meets the resistance of external force and exceeds the specified limit value of the clutch 4, the central shaft 41 of the clutch 4 slips relative to the inner hole 421 of each C-shaped friction plate 42 when the pallet 1 cannot be normally turned over, and the speed reducing motor 3 cannot be damaged due to the interference of the external force.

In normal times, the display panel 9 and the flat bed 1 are turned right close to the roof of the vehicle and are kept substantially horizontal, see fig. 6. The guide rod 741 of the slider 74 and the three tension springs 76 extend substantially horizontally rightward, and the right side (upper side in fig. 6) of the inner surface of the pressure plate 742 of the slider 74 is pressed against the outer peripheral surface of the roller 73 on the eccentric pin 72 by the tension of the tension springs, that is, the contact portion is pressed against the outer peripheral surface of the roller, so that the eccentric portion receives the force applied by the contact portion. The gravity G of the display panel 9 and the pallet 1 generates a clockwise downward tilting moment with respect to the axis of the left fixing shaft 62. At this time, referring to fig. 6-1, the three tension springs 76 are pressed against the roller outside the eccentric pin 72 through the contact portion of the pressing plate 742 of the slider 74 to apply a rightward pulling force F1 to the eccentric pin 72, and since the eccentric pin 72, the eccentric disc 71 and the left fixed shaft 62 are fixed, they will not move nor rotate relative to the axis of the left fixed shaft 62; on the contrary, the reaction force F2 exerted on the pressing plate 742 of the sliding block 74 by the outer peripheral surface of the roller 73 on the eccentric pin 72 causes the sliding block 74 to generate a counter moment of counterclockwise rotation with respect to the axis of the left fixed shaft 62, and the counter moment is transmitted to the flat plate frame 1 through the guide block 75, so that the above-mentioned gravity moment is greatly cancelled, the overturning moment action exerted on the output shaft 31 of the speed reduction motor by the gravity G of the display panel 9 and the flat plate frame 1 is greatly reduced, and the locking capability of the display panel 9 and the flat plate frame 1 in the horizontal state is improved.

When the display panel 9 and the flat rack 1 are in the state of being inclined to the lower right, or when the display panel 9 and the flat rack 1 are in the state of being erected downward, or when the display panel 9 and the flat rack 1 are once turned up to the left to be close to the ceiling of the vehicle, and are kept substantially horizontal, the three tension springs 76 apply a tensile force to the eccentric pin 72 through the pressing plate 742 of the slider 74, and since the eccentric pin 72, the eccentric disc 71 and the left fixed shaft 62 are all fixed, they do not move nor rotate with respect to the axis of the left fixed shaft 62; on the contrary, the reaction force exerted on the pressing plate 742 of the slider 74 by the outer peripheral surface of the roller 73 on the eccentric pin 72 causes the slider 74 to generate a counter torque of counterclockwise rotation relative to the axis of the left fixed shaft 62, and the counter torque is transmitted to the flat pallet 1 through the guide block 75, so that the above-mentioned gravity torque is greatly offset, the action of the overturning torque exerted on the output shaft 31 of the speed reducing motor by the gravity G of the display panel 9 and the flat pallet 1 is greatly reduced, and the movement of the output shaft 31 of the speed reducing motor is easier and more free.

As shown in fig. 6 and 6-1, it is obvious that the gravity balance mechanism can immediately counteract the gravity moment generated by the gravity of the display panel 9 and the plate rack 1 in time when the display panel 9 and the plate rack 1 are in mirror image relationship. Similarly, when the display panel 9 is tilted to the lower left, referring to the situation of the mirror image of fig. 5, it is inferred that the gravity balance mechanism can also promptly cancel out the moment of gravity generated by the gravity of the display panel 9 and the flat panel frame 1. Details are not described again.

When the vehicle runs up and down or jolts and back, no matter what state the display panel 9 and the plate rack 1 are, the gravity balance mechanism can immediately offset the impact moment generated by the impact force on the display panel 9 and the plate rack 1. Thereby avoiding damage to the reduction motor 3 caused by these impact forces.

When special conditions are met, the erected pallet 1 and the display panel 9 need to be folded in an emergency, and personnel on the vehicle can forcibly push the pallet 1 and the display panel 9 forwards or backwards to make the corresponding overturn until the pallet is folded to be close to the ceiling of the vehicle regardless of whether the display is powered on or not. Providing a smooth passage for the evacuation of people on the vehicle. Because the gravity balance mechanism can immediately offset the thrust moment generated by the thrust borne by the display panel 9 and the plate frame 1 in time, the speed reducing motor 3 can also be protected.

Example two

Please refer to fig. 7 for a structure of a flipping unit of a vehicle-mounted display according to a second embodiment. The turning device has a connecting frame comprising a pallet 1 and a mounting frame 2. The pallet 1 is attached to the back of a display board (not shown in fig. 7). The mounting frame 2 is fixed on the roof of the vehicle, and the left end and the right end of the mounting frame are respectively provided with a right lug 21 and a left lug 22 which extend downwards. A left rotating frame part, a driving mechanism and a right rotating frame part are sequentially and fixedly mounted on one side of the flat frame 1 close to the mounting frame 2, the left rotating frame part comprises a left rotating frame 61, and the right rotating frame part comprises a right rotating frame 51.

The driving mechanism comprises a speed reducing motor 3, and an output shaft 31 of the speed reducing motor 3 is coaxially connected with a right fixed shaft 52 which is sleeved on a right rotating frame 51 through a clutch 4. The right end of the right fixed shaft 52 is non-rotatably connected to the right lug 21 of the mounting bracket 2 via a right flange 53. The left fixed shaft 62 is sleeved on the left rotating frame 61, and the left end of the left fixed shaft 62 is connected with the left lug 22 of the mounting frame 2 in a non-rotatable manner through the left flange 63. The left fixed shaft 62 is coaxial with the right fixed shaft 52 and forms a rotation axis for the pallet 1 to turn relative to the mounting frame 2. The right rotating frame 51 is provided with an angle switch 8, and the angle switch 8 provides an angle signal for relative rotation between the right rotating frame 51 and the right fixed shaft 52.

The driving assembly composed of the reduction motor 3, the clutch 4, the right rotating frame 51, the right fixed shaft 52 and the like is the same as that in the first embodiment, and the description thereof is omitted.

Please refer to fig. 8 and 9 for the structure of the gravity balance mechanism in the embodiment of the display turnover device. The gravity balance mechanism includes a left flange 63, a spring seat 77', a left rotating frame portion, a rotating portion, an eccentric portion, a sliding portion, and an elastic mechanism, etc. which constitute the gravity balance mechanism in the present embodiment. The left rotating frame part comprises a left rotating frame 61, a guide block 75 and a cover plate 78; the rotating part includes a left fixed shaft 62 and an eccentric disc 71; the eccentric portion comprises an eccentric portion comprising an eccentric pin 72' and a roller 73; the slide portion includes a slider 74'; the resilient means comprises a spring, which is a tension spring 76'.

The first bearing 613 and the second bearing 614 are mounted in the shaft hole 611 of the left rotating frame 61 on the side close to the mounting frame 2, and the left fixing shaft 62 is inserted into the inner holes of the two bearings 613 and 614. The left end of the left fixed shaft 62 is provided with a platform 621 along the outer circumference, the center hole 631 of the left flange 63 is an oblong hole, and the left end of the left fixed shaft 62 is tightly inserted into the center hole 631 of the left flange 63. The eccentric disc 71 is fixedly installed at the right end of the left fixed shaft 62, and an eccentric pin 72' protruding rightward is fixedly installed at the side (lower side) of the right end surface of the eccentric disc 71 away from the mounting bracket 2. The diameter of the eccentric disc 71 is larger than that of the left fixed shaft 62 to increase the distance of the eccentric pin 72' from the axial center of the left fixed shaft 62. The roller 73 is rollably fitted over the eccentric pin 72'.

The guide block 75 is mounted on the right side surface of the left rotating frame 61 on the side away from the mounting frame 2. The guide block 75 has a longitudinal guide groove 751 formed on the right side surface thereof. The middle part of the sliding block 74 'is a strip-shaped guide rod 741', the upper end of the guide rod 741 'is fixedly provided with an acting plate, the acting plate is a pressing plate 742', the pressing plate is provided with a contact part, the lower end of the guide rod 741 'is provided with a connecting seat, and the connecting seat is a clamping jaw 743'. The pressing plate 742 ' at the upper end of the slider 74 ' is not bent and is perpendicular to the guide rod 741 '. The guide rod 741 ' of the slider 74 ' is slidably fitted in the guide groove 751 of the guide block 75, and the cover plate 78 covers the right end face of the guide block 75, so that the slider 74 ' is restricted to slide only up and down relative to the guide block 75. Two tension springs 76 'arranged side by side are respectively arranged at both sides of the middle lower part of the guide rod 741', the lower ends of the two tension springs are respectively connected with the claws 743 'at the lower ends of the guide rods 741' of the slide block 74 ', and the upper ends of the two tension springs are respectively connected with the spring seats 77' which are fixed on the pallet 1 and are close to the guide blocks 75. The slider 74 'is pulled upward by the tension spring 76, so that the contact portion of the pressing plate 74' of the slider 74 'is pressed against the outer peripheral surface of the roller 73 on the eccentric pin 72'. Wherein the guide block, the spring seat, the spring and the connecting seat are sequentially disposed under the eccentric pin 72.

In normal times, the display panel 9 and the flat rack 1 are folded up to the right to be close to the ceiling and are kept substantially horizontal, the guide rod 741 'and the two tension springs 76' of the slider 74 'extend substantially horizontally to the right, the left side of the top surface of the pressing plate 742' of the slider 74 'is pressed against the outer peripheral surface of the roller 73 on the eccentric pin 72' by the tension of the tension springs, that is, the contact portion abuts against the outer peripheral surface of the roller, and the contact portion applies a force to the eccentric portion. The gravity G1 of the display board 9 and the pallet 1 generates a clockwise downward tilting gravity moment with respect to the axial center of the left fixing shaft 62. The two tension springs 76 ' apply a leftward pushing force to the eccentric pin 72 ' through the pressing plate 742 ' of the slider 74 ', and since the eccentric pin 72 ', the eccentric disc 71 and the left stationary shaft 62 are fixed, they will not move nor rotate relative to the axis of the left stationary shaft 62; on the contrary, the reaction force exerted on the pressing plate 742 'of the slider 74' by the outer peripheral surface of the roller 73 on the eccentric pin 72 'causes the slider 74' to generate a counter torque of counterclockwise rotation with respect to the axis of the left fixed shaft 62, and the counter torque is transmitted to the flat pallet 1 through the guide block 75, so that the above-mentioned gravity torque is greatly cancelled, the overturning moment action exerted on the output shaft 31 of the speed reduction motor by the weight G1 of the display panel 9 and the flat pallet 1 is greatly reduced, and the locking capability of the display panel 9 and the flat pallet 1 in the horizontal state is improved.

When the display panel 9 and the flat bed 1 are in the downward standing state, or once the display panel 9 and the flat bed 1 are turned up to the left to be close to the ceiling of the vehicle and kept substantially horizontal, a reverse moment is generated which is transmitted to the flat bed 1 through the guide block 75, which greatly cancels the above-mentioned gravitational moment, greatly reduces the action of the turning moment exerted by the weight G1 of the display panel 9 and the flat bed 1 on the output shaft 31 of the reduction motor, and improves the locking ability of the display panel 9 and the flat bed 1 in the horizontal state.

The side of the eccentric disc far away from the mounting frame is fixedly provided with the eccentric pin, and the pressing plate at the upper end of the sliding block is vertical to the guide rod.

EXAMPLE III

The turning device structure difference with the vehicle-mounted display of the first embodiment is that:

referring to fig. 10, the driving mechanism and the gravity balance mechanism are respectively disposed on two sides of the flat rack 1, such as the right side and the left side, so as to reduce the thickness of the flat rack, and make the combined thickness of the display and the flat rack thinner, with reasonable layout and compact structure. The drive mechanism is fixedly mounted on the right side of the mounting frame 2, for example, may be fixedly mounted on a right lug of the mounting frame 2 (not shown in fig. 10), or may be directly fixedly mounted on the mounting frame 2. The driving mechanism is in transmission connection with the flat plate frame 1 to drive the flat plate frame 1 to rotate around the rotating shaft. According to the needs, the driving mechanism comprises a motor 3 with a clutch arranged inside and a driving shaft 35 in transmission connection with the motor 3, the driving shaft 35 and the plate rack 1 cannot be connected in a relative rotation mode, and the driving shaft 35 rotates to drive the plate rack 1 to rotate. The axis of the driving shaft 35 is coincided with the axis of the left fixed shaft, and the driving shaft is matched with the fixed shaft to form a rotating shaft for the rotation of the pallet.

Please refer to fig. 11 and 12 for the structure of the gravity balance mechanism of the display tilting device of the present embodiment. The gravity balance mechanism comprises a left flange 63, a left rotating frame part, a rotating part, an eccentric part, a sliding part, an elastic mechanism and the like. The left flange 63 and the plane frame 1 are relatively fixed, and the left rotating frame part is fixedly connected on the mounting frame 2. The left rotating frame part comprises a fixed connection seat 79 besides the left rotating frame 61, the guide block 75 and the cover plate 78; the rotating part comprises a left fixed shaft 62 and an eccentric disc 71, the left fixed shaft 62 and the left flange 63 are connected together in a non-rotatable way, the eccentric disc 71 is fixedly connected with the left fixed shaft 62, and the eccentric disc is a disc body fixedly connected with an eccentric pin; the eccentric part comprises an eccentric part and a rolling sleeve 73, the eccentric part comprises an eccentric pin 72, the eccentric pin is fixedly connected on the eccentric disc, the rolling sleeve is sleeved outside the eccentric pin, and the eccentric pin is arranged close to the upper side; the slide portion includes a slider 74; the resilient means comprises a spring, which is a tension spring 76.

The slide 74 is provided with a guide rod 741, the slide 74 having a first end portion and a second end portion; the first end part is provided with a penetrating part 744 penetrating from left to right, the penetrating part 744 is provided with an inner wall, and the inner wall is provided with a contact part; the second end portion is provided with a connecting socket comprising a locating pin 745 secured to the second end portion. The guide rod 741 of the slider 74 is slidably fitted in the guide groove 751 of the guide block 75, and the cover plate 78 covers the right end face of the guide block 75, so that the slider 74 is restricted from sliding up and down relative to the guide block 75.

The left rotating frame 61 is fixedly connected on the mounting frame 1, the right end face (back face) of the left rotating frame 61 is positioned on the left side of the pallet 1, and the eccentric part is positioned in the penetrating part 744; the left rotating frame 61 is fixedly connected with a fixed connection seat 79, and a spring seat 77 is arranged on the fixed connection seat 79; the lower end of the tension spring 76 is connected to the spring seat 77, the upper end thereof is connected to the positioning pin 745, and the contact portion and the lower end of the tension spring 76 are located on both sides of the eccentric portion. The tension spring 76 pulls the slider 74 so that the slider 74 receives the tension of the tension spring 76 and the contact portion of the inner wall of the through portion 744 is in contact with the outer peripheral wall of the roller under the action of the tension, the contact portion is pressed against and contacts the eccentric portion to apply an acting force to the eccentric portion, and the eccentric portion directly receives a counter moment by the tension to balance the gravity moment generated by the pallet and the display. Wherein: the guide block, the connecting seat, the spring and the spring seat are sequentially arranged below the eccentric pin.

Further: the back of the left rotating frame 61 is provided with a connecting structure, and the fixed connection seat 79 is fixedly connected to the left rotating frame and is positioned on the connecting structure, so that the back of the left rotating frame is flush with the back of the fixed connection seat, and the structure is further compact; the left end face (front face) of the left rotating frame 61 is provided with a concave guide fixing groove, the guide block is fixedly arranged in the fixing groove, the opening of the guide groove of the guide block faces the left, and the cover plate is fixedly covered on the opening of the guide groove of the guide block. The right end face of the left rotating frame 61 is provided with a U-shaped notch 612, the fixed connection seat 79 comprises a bottom plate, two side plates which are respectively fixedly connected to two sides of the bottom plate and a lower plate which is fixedly connected to the lower side of the bottom plate, so that the fixed connection seat forms a containing cavity, the bottom plate and the two side plates are matched with the U-shaped notch in a matching mode, the back face of the fixed connection seat and the back face of the left rotating frame are flush, and the spring is located in the containing cavity.

Further: the through portion 744 is in an L-shaped structure, the L-shaped structure includes a base portion 7441 and a protrusion portion 7442 connected to the base portion, the base portion and the protrusion portion are arranged along a pulling force direction generated by the elastic mechanism, a side wall of the base portion facing the protrusion portion constitutes the above-mentioned contact portion, one end of the base portion 7441 is connected to a side surface of the slider, and a connection portion 7443 of the protrusion portion and the base portion is rounded. The penetrating part is L-shaped, so that the movement of the eccentric part is not interfered, and the function of guiding acting force can be achieved.

Example four

The turning device structure difference with the vehicle-mounted display of the third embodiment lies in that: referring to fig. 13, neither end of the base 7441 opens to the side of the slider.

EXAMPLE five

The turning device structure difference with the vehicle-mounted display of the third embodiment lies in that: referring to fig. 14, the penetrating portion 744 is in a convex structure, the convex structure includes a base portion 7441 and a protrusion portion 7442 connected to the base portion, the base portion and the protrusion portion are arranged along the pulling direction generated by the elastic mechanism, and the side wall of the base portion facing the protrusion portion constitutes the contact portion. The projection is of arcuate configuration and the junction 7443 of the projection and the base is radiused. The penetrating part is in a convex shape, so that the movement of the eccentric part is not interfered, and the function of guiding acting force can be achieved.

EXAMPLE six

The turning device structure difference with the vehicle-mounted display of the third embodiment lies in that: referring to fig. 15 and 16, the eccentric pin is disposed toward the lower side; the lower end of the slide block is provided with a connecting seat, the connecting seat comprises a first push plate 746, the upper end of the slide block is provided with an acting plate, and the acting plate is provided with a contact part; the spring seat fixedly arranged on the fixed seat 79 comprises a second push plate 791; the spring of the elastic mechanism comprises a pressure spring 761, the upper end of the pressure spring 761 abuts against the first push plate 746 of the connecting seat, the lower end of the pressure spring 761 abuts against the second push plate 791 of the spring seat, so that the slide block 74 is pushed by the pressure spring 761, the contact part of the slide block abuts against the peripheral wall of the rolling sleeve under the action of the pushing force to apply an acting force to the eccentric part, and the acting force generates a reverse moment to balance the moment. Wherein: the guide block, the connecting seat, the spring and the spring seat are sequentially arranged below the eccentric pin. According to the requirement, the upper end of the cover plate 78 is provided with a protruding part which extends out of the guide block, the tail end of the protruding part is concavely provided with a middle gap 782, the tail end of the protruding part extends towards the right to form a boss 781, and the boss forms a limit boss with opening and closing functions.

EXAMPLE seven

The turning device structure difference with the vehicle-mounted display of the sixth embodiment lies in that: referring to fig. 17, the cover plate 78 has no protruding portion.

Example eight

The turning device structure difference with the vehicle-mounted display of the second embodiment is that: referring to fig. 18 and 19, the eccentric pin is disposed against the upper side; the lower end of the slide block is provided with a connecting seat, the connecting seat comprises a first push plate 746, the upper end of the slide block is provided with an acting plate, and the acting plate is provided with a contact part; a box body is fixedly connected to the connecting frame or the left rotating frame, the box body comprises a bottom plate, two side plates fixedly connected to two sides of the bottom plate respectively and a lower plate fixedly connected to the lower side of the bottom plate, the box body is provided with an upward opening and a forward opening, and the lower plate forms a second push plate 791; the spring of the elastic mechanism comprises a pressure spring 761, and the pressure spring 761 is positioned in the box body; the upper end of the compression spring 761 abuts against the first push plate 746 of the connecting seat, and the lower end abuts against the second push plate 791 of the spring seat, so that the slider 74' receives the thrust of the compression spring 761, and the contact part of the slider abuts against the outer peripheral wall of the rolling sleeve under the thrust to apply an acting force to the eccentric part, and the acting force generates a reverse moment to balance the moment. Wherein: the guide block, the connecting seat, the spring and the spring seat are sequentially arranged below the eccentric pin.

Example nine

The turning device structure difference with the vehicle-mounted display of the second embodiment is that: referring to fig. 20 and 21, the gravity balance mechanism includes a left flange 63, a left rotating frame portion, a rotating portion, an eccentric portion, a sliding portion, an elastic mechanism, and the like. The left rotating frame part comprises a left rotating frame 61, a guide block 75' and a cover plate 78; the rotating part comprises a left fixed shaft 62 and an eccentric disc 71, the left fixed shaft 62 and the left flange 63 are connected together in a non-rotatable way, the eccentric disc 71 is fixedly connected with the left fixed shaft 62, and the eccentric disc is a disc body fixedly connected with an eccentric pin; the eccentric part comprises an eccentric part and a rolling sleeve 73, the eccentric part comprises an eccentric pin 72, the eccentric pin is fixedly connected on the eccentric disc, the rolling sleeve is sleeved outside the eccentric pin, and the eccentric pin is arranged close to the lower side; the slide portion includes a slider 74'; the resilient means comprises a spring, which is a tension spring 76'.

The slide 74 ' is provided with a guide rod 741 ', the slide 74 ' having a first end portion and a second end portion; the first end part is provided with a penetrating part 744 penetrating from left to right, the penetrating part 744 is provided with an inner wall, and the inner wall is provided with a contact part; the second end portion is provided with a connecting seat. The guide rod 741 'of the slider 74' is slidably fitted into the guide groove 751 'of the guide block 75', and the cover plate 78 covers the right end face of the guide block 75, so that the slider 74 'is restricted from sliding up and down relative to the guide block 75'.

The eccentric portion is located within the through portion 744; a box body is fixedly arranged on the flat plate frame or the left rotating frame, the box body comprises a bottom plate, two side plates which are fixedly connected to two sides of the bottom plate respectively and a lower plate fixedly connected to the lower side of the bottom plate, the box body is provided with an upward opening and a forward opening, and the lower plate is provided with a spring seat 77'; the tension spring 76 ' is positioned in the box body, the lower end of the tension spring is connected with the spring seat 77 ', the upper end of the tension spring is connected with the connecting seat, and the contact part and the lower end of the tension spring 76 ' are respectively positioned at two sides of the eccentric part. The tension spring 76 'pulls the slider 74' so that the slider 74 'receives the tension of the tension spring 76' and contacts the contact portion of the inner wall of the through portion 744 with the outer peripheral wall of the roller under the tension, the contact portion being pressed against the contact eccentric portion to apply a force to the eccentric portion, which generates a counter moment to balance the moment. Wherein: the guide block, the connecting seat, the spring and the spring seat are sequentially arranged below the eccentric pin.

Further: the through-going portion 744 is of a convex structure, the convex structure comprises a base 7441 and a protrusion communicating with the base, the base and the protrusion are arranged along the direction of the pulling force generated by the elastic mechanism, and the side wall of the base facing the protrusion constitutes the contact portion. The bulge is of an arc-shaped structure, and the joint of the bulge and the base is rounded.

Example ten

The turning device structure difference with the vehicle-mounted display of the second embodiment is that: referring to fig. 22 and 23, two spring seats 77' are respectively fixed to the cover plate 78 and the rotary frame.

Compared with the prior art, the turnover device of the vehicle-mounted display in each embodiment of the invention has the advantages of fewer additional parts, simple structure, low cost, good technical effect on protection of the speed reducing motor and good reliability. Its shock resistance is strong, and is suitable for reducing thickness of whole machine. Particularly, when special conditions are met, whether the display is electrified or not, personnel on the vehicle can forcibly push the pallet and the display board forwards or backwards, and the pallet and the display board are forced to be folded close to the roof of the vehicle under the condition that the speed reducing motor is not damaged, so that a smooth passage is provided for the evacuation of the personnel on the vehicle. This is a previously unpredictable benefit. The new technical standard of the industry puts forward the requirement on the use safety problem; however, the prior art has not yet been realized. The invention solves the problem smoothly while achieving the purpose of the invention. Therefore, the gravity balance mechanism of the display turnover device has commercial prospect of popularization and promotion.

The above description is only a preferred embodiment of the turnover device of the vehicle-mounted display of the present invention, but not to limit the scope of the implementation of the present invention, and according to the technical scheme and the content of the description of the present invention, equivalent changes and modifications are made, for example, the guide block and the cover plate are made into an integrated guide block, the guide rod, the pressing plate and the clamping jaws of the sliding block are made separately, the guide rod is slidably inserted into the guide slot during assembly, then the pressing plate and the clamping jaws are respectively welded at two ends of the guide rod to form a complete sliding block, and finally the guide block with the sliding block is directly fixed on the flat rack; and the like, are intended to be within the scope of the present invention.

Claims (24)

1. The turning device of the vehicle-mounted display comprises two frame bodies, wherein the two frame bodies are respectively an installation frame and a connecting frame, the two frame bodies are respectively provided with a rotating part and a rotating frame part, and the rotating part and the rotating frame part can rotate relatively; the method is characterized in that: the device also comprises an eccentric part, a movable part and an elastic mechanism; the eccentric part and the rotating part are relatively fixed, and the eccentric part is eccentrically arranged relative to the rotating axis of the rotating part and the rotating frame part; the movable part and the rotating frame part can move relatively; the elastic mechanism is connected with the movable part and can generate elastic force applied to the movable part, the movable part is in contact with the eccentric part under the action of the elastic force, and the eccentric part is also subjected to acting force applied by the movable part.

2. The turning device of the vehicle-mounted display according to claim 1, characterized in that: the movable part and the rotating frame part can slide relatively, so that the movable part forms a sliding part; the elastic force generated by the elastic mechanism is pulling force, and the movable part is pulled and pressed against the contact eccentric part to apply acting force to the eccentric part; the movable portion has a contact portion abutting against the eccentric portion.

3. The turning device of the vehicle-mounted display according to claim 2, characterized in that: the movable part is provided with a penetrating part, the penetrating part is provided with an inner wall, the inner wall is provided with the contact part, the eccentric part is at least partially positioned in the penetrating part, the contact part is in contact with the eccentric part, and the contact part is pressed against the contact eccentric part under the action of tensile force generated by the elastic mechanism.

4. The turning device of the vehicle-mounted display according to claim 2, characterized in that: the movable part comprises an acting plate, the acting plate is provided with the contact part, the contact part is contacted with the eccentric part, and the contact part is pressed against the eccentric part under the action of the pulling force generated by the elastic mechanism.

5. The turning device of the vehicle-mounted display according to claim 4, characterized in that: the movable part comprises a sliding block and the acting plate which are fixedly connected, the sliding block and the rotating frame part can slide relatively, and the acting plate and the sliding block are arranged in an intersecting mode.

6. The turning device of the vehicle-mounted display according to claim 1, characterized in that: the movable part and the rotating frame part can slide relatively, and the movable part forms a sliding part; the elastic force generated by the elastic mechanism is a thrust force, and the movable part receives the thrust force and abuts against and contacts the eccentric part to apply an acting force to the eccentric part; the movable portion has a contact portion abutting against the eccentric portion.

7. The turning device of the in-vehicle display according to any one of claims 1 to 6, characterized in that: the eccentric part comprises an eccentric part and a roller sleeve which can be sleeved outside the eccentric part in a rolling way, and the movable part is in contact with the roller sleeve and acts on the peripheral wall of the roller sleeve under the action of the force exerted by the movable part.

8. The turning device of the in-vehicle display according to any one of claims 2 to 6, characterized in that: the sliding direction of the movable part is vertically crossed with the rotating axis of the rotating part.

9. The turning device of the in-vehicle display according to any one of claims 1 to 6, characterized in that: the rack body provided with the rotating part is a first rack body, and the rack body provided with the rotating rack part is a second rack body; the elastic mechanism is provided with a first end and a second end connected with the movable part, and the first end of the elastic mechanism is connected with the second frame body.

10. The turning device of the in-vehicle display according to any one of claims 1 to 6, characterized in that: the rack body provided with the rotating part is a first rack body, and the rack body provided with the rotating rack part is a second rack body; the first support body is an installation frame, and the second support body is a connecting frame.

11. The turning device of the in-vehicle display according to any one of claims 1 to 6, characterized in that: the rack body provided with the rotating part is a first rack body, and the rack body provided with the rotating rack part is a second rack body; the first support body is a connecting frame, and the second support body is an installation frame.

12. The turning device of the in-vehicle display according to any one of claims 1 to 6, characterized in that: the elastic mechanism has a first end and a second end connected to the movable portion, the first end of the elastic mechanism being connected to the rotating frame portion.

13. The turning device of the vehicle-mounted display according to claim 1, characterized in that: the movable part is provided with a connecting seat, and the rotating frame part is provided with a spring seat; the elastic mechanism comprises a spring, one end of the spring is connected to the spring seat, and the other end of the spring is connected to the connecting seat.

14. The turning device of the vehicle-mounted display according to claim 13, characterized in that: the rotating frame part comprises a rotating frame and a fixed connection seat fixedly connected to the rotating frame, and the fixed connection seat is provided with the spring seat; the movable part comprises a sliding block, the rotating frame part is provided with a sliding groove, and the sliding block is connected to the sliding groove in an adaptive mode; the rotating frame is provided with two sides which are arranged on the front and back, the guide groove is positioned on one side, the other side is provided with a connecting structure, and the fixedly connected seat is matched and fixedly connected with the connecting structure.

15. The turning device of the vehicle-mounted display according to claim 14, characterized in that: the guide slot is located the positive side of swivel mount, the dorsal part of swivel mount is equipped with foretell connection structure, just, the swivel mount back flushes with the rigid coupling seat back.

16. The turning device of the vehicle-mounted display according to claim 14, characterized in that: the rigid coupling seat is equipped with the holding chamber, the spring is located the holding intracavity.

17. The turning device of the vehicle-mounted display according to claim 2, characterized in that: the movable part is provided with a guide rod which is connected in a guide groove arranged on the rotating frame part in a sliding way; the movable part is provided with a first end part and a second end part, the first end part is provided with the contact part, and the second end part is provided with a connecting seat; the elastic mechanism is provided with a first end and a second end connected with the movable part, and the second end of the elastic mechanism is connected with the connecting seat.

18. The turning device of the in-vehicle display according to any one of claims 1 to 6, characterized in that: the rack body provided with the rotating part is a first rack body, and the rack body provided with the rotating rack part is a second rack body; the rotating part at least partially extends out of the side wall of the first frame body, and the rotating frame part is located on the side of the second frame body.

19. The turning device of the in-vehicle display according to any one of claims 1 to 6, characterized in that: the rotating part comprises a fixed shaft fixedly connected to the first frame body and an eccentric disc fixedly connected to the fixed shaft, the eccentric part comprises an eccentric part fixedly arranged on the eccentric disc, and the axis of the fixed shaft is superposed with the rotating axis of the rotating part; the rotating frame part comprises a rotating frame and a guide groove which are fixedly connected together, the movable part is provided with a sliding block, the sliding block is provided with a guide rod, the guide rod is connected in the guide groove in a sliding manner, and the lower end of the sliding block is provided with a connecting seat; the rotating frame part is provided with a spring seat; the upper end of the elastic mechanism is connected with the connecting seat at the lower end of the sliding block, and the lower end of the elastic mechanism is connected with the spring seat; the guide groove and the spring seat are sequentially arranged below the eccentric disc.

20. The turning device of the in-vehicle display according to any one of claims 1 to 6, characterized in that: the rotating part comprises a fixed shaft fixedly connected to the first frame body and an eccentric disc fixedly connected to the fixed shaft, the eccentric part comprises an eccentric part fixedly arranged on the eccentric disc, and the axis of the fixed shaft is superposed with the rotating axis of the rotating part; the rotating frame part comprises a rotating frame and a guide groove which are fixedly connected together, the movable part is provided with a sliding block, the middle part of the sliding block is provided with a guide rod, the guide rod is connected in the guide groove in a sliding way, and the lower end of the sliding block is provided with a connecting seat; the rotating frame part is provided with a spring seat; the lower end of the elastic mechanism is connected with the connecting seat at the lower end of the sliding block, and the upper end of the elastic mechanism is connected with the spring seat; the guide groove and the spring seat are sequentially arranged below the eccentric disc.

21. The turning device of the vehicle-mounted display according to claim 1, characterized in that: still include actuating mechanism, actuating mechanism installs and connects the mounting bracket at link and transmission.

22. The turning device of the vehicle-mounted display according to claim 1, characterized in that: still include actuating mechanism, actuating mechanism installs at the mounting bracket and the transmission connection link.

23. The turning device of the in-vehicle display according to claim 22 or 21, characterized in that: the gravity balance mechanism comprises the rotating part, a rotating frame part, an eccentric part, a movable part and an elastic mechanism; the gravity balance mechanism and the driving mechanism are respectively arranged on two sides of the connecting frame.

24. The turning device of the in-vehicle display according to claim 20, characterized in that: the rotating part comprises a fixed shaft fixedly connected to the first frame body and an eccentric disc fixedly connected to the fixed shaft, the eccentric part comprises an eccentric part fixedly arranged on the eccentric disc, and the axis of the fixed shaft is superposed with the rotating axis of the rotating part; the rotating frame part comprises a rotating frame and a guide groove which are fixedly connected together, the movable part is provided with a sliding block, the middle part of the sliding block is provided with a guide rod, the guide rod is connected in the guide groove in a sliding way, and the lower end of the sliding block is provided with a connecting seat; a spring seat is arranged on the fixed frame connected with the rotating frame part; the lower end of the elastic mechanism is connected with the connecting seat at the lower end of the sliding block, and the upper end of the elastic mechanism is connected with the spring seat; the guide groove and the spring seat are sequentially arranged below the eccentric disc.

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