CN217863951U - Vehicle-mounted rear-row display screen turnover mechanism - Google Patents

Abstract

The utility model provides an on-vehicle back row display screen tilting mechanism, includes the support, install locking subassembly on the support, install upset subassembly on the support, install the supporting component on the support, by the display screen of upset subassembly drive upset, the supporting component includes the base, installs the pivot on the supporting base, the upset subassembly includes the upset base, installs the upset motor on the upset base and by upset motor drive's clutch assembly, clutch assembly is receiving powerful external force and is used for the time spent, and the disconnection is connected with upset motor output, and the locking subassembly can be closed at the display screen and reset the back lock and can not move the bullet, has improved the security of display screen, when receiving powerful external force and press and draw, clutch assembly can skid among the upset subassembly and unload the power, unloads the power that the display screen received, can effectively protect display screen and system mechanism.

Description

Vehicle-mounted rear-row display screen turnover mechanism

Technical Field

The utility model relates to an on-vehicle electrical apparatus field particularly, especially relates to an on-vehicle back row display screen tilting mechanism.

Background

Along with the improvement of people's living standard and the development of automotive industry, people also provided higher requirement to car amusement nature, and on-vehicle back row amusement display screen receives more and more passenger favours as a common on-vehicle amusement equipment, and the use of back row on-vehicle amusement display screen is more and more general, provides entertainment system for the back row passenger, has also promoted the science and technology sense of car simultaneously. At present, although some vehicles are already provided with the display screen turnover assembly, the traditional display screen turnover assembly is driven by a suspension type motor, does not have good protection effect, is easy to damage when being subjected to external force, and can not effectively close the display screen when the display screen is closed.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an on-vehicle back row display screen tilting mechanism realizes carrying out the upset function of certain angle to the on-vehicle display screen of back row to can carry out the separation and reunion protection of skidding to the system when the display screen receives the exogenic action, and lock when the display screen is closed.

The purpose of the utility model is realized through the following technical scheme:

the utility model provides a vehicle-mounted back row display screen tilting mechanism, includes the support, installs locking subassembly on the support, installs upset subassembly on the support, installs the supporting component on the support, by the display screen of upset subassembly drive upset, the supporting component is including supporting the base, installing the pivot on supporting the base, the upset subassembly includes the upset base, installs the upset motor on the upset base, installs by upset motor drive's multistage worm and by multistage worm drive's separation and reunion subassembly on the upset base, the pivot is receiving powerful exogenic action time, pivot disconnection and helical gear and hinge's fixed connection to unload the exogenic force.

The display screen upset mainly by the support, supporting component, locking subassembly and upset subassembly are constituteed, supporting component mainly comprises the support base, support upper cover and pivot, the pivot is installed on supporting the base, the pivot outside is the display screen installing support, the display screen mountable is on showing the installing support, including the upset base in the upset subassembly, the upset motor of special drive upset is equipped with on the upset base, the upset motor passes through multistage worm transmission torque, and meet the clutch module that external force can skid the power of unloading and install the pivot on the upset base, locking subassembly can close the unable bullet of locking after reseing at the display screen, the security of display screen has been improved, when receiving the pressure of strong external force and pulling, clutch module skidded in the upset subassembly, the pivot can free rotation with upset motor output mechanism separation, because the pivot is connected with the hinge axis, the hinge axis can then the pivot rotate when the helical gear skidded, can make the display screen steadily rotate and unload external force, make display screen and upset subassembly obtain effective protection when receiving external force.

Optionally, in a possible implementation manner, the clutch assembly includes a helical gear mounted on the rotating shaft, a clutch pressing block connected with the helical gear and assembled on the rotating shaft, a spring pressing the helical gear and the clutch pressing block, and a U-shaped clamp mounted on the rotating shaft, a gasket is mounted between the U-shaped clamp and the spring, and the helical gear is indirectly driven by the flipping motor.

Clutch module includes the pivot, the helical gear, the separation and reunion briquetting, the packing ring, U-shaped card and spring, the separation and reunion briquetting is installed and is cooperateed with the helical gear in the pivot, become a whole, rely on helical gear and separation and reunion briquetting friction conduction power between the two, make helical gear and pivot joint motion, U-shaped card still is equipped with at the rear of separation and reunion briquetting, the packing ring is equipped with on the U-shaped card, the spring is equipped with on the packing ring, rely on the U-shaped to clamp the assembly spring to spring compression, for separation and reunion briquetting and helical gear provide the pretightning force, the external multistage worm of helical gear, can drive multistage worm control by upset motor and rotate, when upset motor drive display screen upset, more steady smoothness when making the display screen rotate, promote science and technology and feel.

Optionally, in a possible implementation manner, the helical gear is provided with a boss, the clutch pressing block is provided with a groove, friction force exists between the boss of the helical gear and the groove of the clutch pressing block, and thrust of the turnover motor is smaller than the maximum static friction between the boss of the helical gear and the groove of the clutch pressing block.

The recess of separation and reunion briquetting and the boss of helical gear meet the face and be coarse structure, both tightly press together because the pretightning force that the spring provided, produce a frictional force, upset motor promotes the helical gear under the normal condition, because the separation and reunion briquetting compresses tightly makes helical gear and pivot as an organic whole, thereby the helical gear drives the pivot and rotates, the thrust of upset motor is less than the biggest static friction between helical gear and the separation and reunion briquetting, when receiving external powerful external force, the atress is greater than the biggest static friction between the boss of helical gear and the recess of separation and reunion briquetting, the boss of helical gear is followed the recess roll-off of separation and reunion briquetting, therefore separation and reunion briquetting and helical gear can take place relative motion, let the motion of pivot no longer receive the helical gear restriction, the pivot follows external force to rotate, the oppression of external force to mechanism and display screen, protect system mechanism and display screen.

Optionally, in a possible implementation manner, a clamping groove is formed in the rotating shaft, the U-shaped clamp is installed in the clamping groove, the gasket is installed on a compression spring on the U-shaped clamp, the spring enables the clutch pressing block and the helical gear to compress tightly and provides a pre-tightening force, a display screen installing support is arranged at the tail end of the rotating shaft, a protruding strip is further arranged on the rotating shaft, a sliding groove is formed in the inner surface of the clutch pressing block, and the sliding groove is installed on the protruding strip.

Still be equipped with the draw-in groove at the pivot front end, the U-shaped card can be conveniently packed into in the draw-in groove, still install a packing ring in U-shaped card top, packing ring oppression spring deformation provides the pretightning force, still be equipped with the display screen installing support in the pivot end, but the display screen convenient and fast installs on a display screen installing support and rotates along with the pivot, still be equipped with a plurality of sand grips in the pivot, be equipped with the spout of cooperation sand grip on the separation and reunion briquetting, both assemble together, the separation and reunion briquetting is received the upset motor and is transmitted the power of helical gear and transmit the pivot through the sand grip on, it rotates to drive the pivot.

Optionally, in a possible implementation manner, the locking assembly includes a locking base, a locking motor installed on the locking base, and a rack driven by the locking motor, and the display screen has a locking stopper matching with the rack.

For the stability and the security of guaranteeing the display screen, still be equipped with a locking subassembly on the support, after the display screen resets and closes, the locking subassembly locks the display screen on the support, can effectively reduce the damage and the prevention illegal personnel that vibrations brought and steal the display screen. The locking subassembly mainly comprises locking base, the locking motor and the rack of installing on the locking base, and locking motor can drive the rack and stretch out and retract, and display screen internally mounted hasp dog is gone up in the cooperation, can reset when closing the display screen and lock the display screen on the support.

Optionally, in a possible implementation manner, the locking motor controls the rack to stretch out and draw back through an execution gear assembly, the execution gear assembly includes a worm, a duplex gear assembly connected to the worm, and a rack engaged with the duplex gear assembly, the worm is fixed to the locking motor, the duplex gears are installed on the base and sequentially engaged, the worm is engaged with the duplex gear, and the rack is engaged with the duplex gear.

In order to achieve the purposes of saving space and enabling transmission to be more stable, the locking motor controls the rack through the execution gear assembly, the execution gear assembly comprises a worm arranged on an output shaft of the locking motor, three groups of double gears and teeth fixed at the rear end of the rack, the worm is transmitted to a worm wheel on a first group of double gears through receiving torque output by the motor, a pinion on the first group of double gears is meshed with a bull gear of a second group of double gears, the torque is transmitted to the second group of double gears, a pinion of the second group of double gears is meshed with a bull gear of a third group of double gears, the torque is transmitted to the third group of double gears, the teeth are meshed with pinions of the third group of double gears to convert the torque into thrust, the rotation speed between the gears can be reduced step by step through alternation of the big gears and the pinions of the double gears, vibration of the locking assembly system is reduced, and the extension of the rack is enabled to be more stable.

Optionally, in a possible implementation manner, the locking base is further provided with a sliding groove, and the rack is installed in the sliding groove.

Be provided with the spout in the locking base, the rack is installed in the spout to can slide along the spout, can be accurate when making the rack stretch out insert in the display screen locking dog by mistake.

Optionally, in a possible implementation manner, there are two sets of the locking assemblies, and the two sets of the locking assemblies are symmetrically arranged on two sides of the display screen.

The locking assemblies on the support are two groups, the locking assemblies and the display screen are symmetrically arranged on two sides of the display screen, and the display screen can be firmly locked from two sides.

The supporting component is arranged opposite to the overturning component, and the rotating shafts of the supporting component and the overturning component are positioned on the same horizontal plane.

The rotating shaft of the supporting component and the rotating shaft of the overturning component are positioned on the same horizontal line and can rotate simultaneously.

Optionally, in a possible implementation, the support includes a key assembly.

Still be equipped with the button subassembly on the support, the passenger can use the button control display screen rotation angle according to the demand of difference.

The utility model discloses compare in prior art's beneficial effect and be:

the utility model discloses an on-vehicle back row display screen tilting mechanism, and a support, the button, locking subassembly and upset subassembly realize the manual control display screen rotation angle, utilize the upset subassembly to realize controlling the display screen upset in an angle, satisfy the flip position requirement of different passengers to the display screen, utilize the helical gear subassembly simultaneously, can skid when the display screen receives powerful exogenic action and unload the power, effectively protect display screen and upset system to avoid external force to destroy, hinge structure's damping force makes the upset of display screen steady more smooth, the locking subassembly can close the back lock that resets and can't move the bullet at the display screen, the security of display screen has been improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a diagram illustrating the overall working effect of the turnover mechanism of the vehicle-mounted rear-row display screen in an embodiment of the present invention.

Fig. 2 is a schematic view of an overturning assembly of the vehicle-mounted rear-row display screen overturning mechanism in an embodiment of the present invention.

Fig. 3 is a schematic view of a clutch assembly of the turnover mechanism for the vehicle-mounted rear-row display screen in an embodiment of the present invention.

Fig. 4 is a schematic view of a locking assembly of the turnover mechanism for the vehicle-mounted rear-row display screen in an embodiment of the present invention.

Fig. 5 is a schematic view of a supporting component of the turnover mechanism for vehicle-mounted rear-row display screen in an embodiment of the present invention.

Fig. 6 is a schematic view of an operating state of the vehicle-mounted rear-row display screen turnover mechanism in an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures. In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when products of the application are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are used for convenience of description and simplification of description only, and do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, should not be construed as limiting the application.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The technical solution in the present application will be described below with reference to the accompanying drawings.

The embodiment provides a vehicle-mounted rear-row display screen turnover mechanism, including support 1, install locking subassembly 3 on support 1, install upset subassembly 2 on support 1, install supporting component 4 on support 1, display screen 6 by the upset subassembly 2 drive upset, supporting component 4 is including supporting base 29, installing the pivot 21 on supporting base 29, upset subassembly 2 is including upset base 28, install upset motor 27 on upset base 28 and by multistage worm 271 driven clutch assembly, pivot 21 is when receiving powerful exogenic action, pivot 21 disconnection and helical gear and hinge's fixed connection to unload the exogenic action.

The display screen 6 overturns and mainly comprises a support 1, a supporting component 4, a locking component 3 and an overturning component 2, the supporting component 4 mainly comprises a supporting base 29, a supporting outer cover 291 and a rotating shaft 21, the rotating shaft 21 is installed on the supporting base 28, the display screen 6 is connected to the outside of the rotating shaft 21, the display screen 6 can be installed on the support, the overturning component 2 comprises the overturning base 28, an overturning outer cover 281 is overturned, the overturning motor 27 special for driving and overturning is installed on the overturning base 28, a clutch component capable of slipping and unloading force when external force is applied and the rotating shaft 21 installed on the overturning base 28 are installed on the rotating shaft 21, the locking component 3 can be locked and can not move after the display screen 6 is closed and reset, the safety of the display screen 6 is improved, when the display screen 6 is pressed and pulled by strong external force, the clutch component slips in the overturning component 2, the helical gear 26 slips, the helical gear 26 is disconnected from the rotating shaft 21, the rotating shaft 21 can rotate freely, the display screen 6 can rotate stably and unload the external force, and the display screen 6 and the overturning component 2 can be effectively protected when the external force is applied.

In this embodiment, the clutch assembly includes a bevel gear 26 mounted on the rotating shaft 21, a clutch pressing block 25 connected to the bevel gear 26 and mounted on the rotating shaft 21, a spring 24 for pressing the bevel gear 26 and the clutch pressing block 25, and a U-shaped clamp 23 mounted on the rotating shaft 21, wherein a washer is mounted between the U-shaped clamp 23 and the spring 24, and the bevel gear 26 is indirectly driven by a flipping motor 27.

The clutch assembly comprises a rotating shaft 21, a helical gear 26, a clutch pressing block 25, a gasket, a U-shaped clamp 23 and a spring 24, wherein the clutch pressing block 25 is installed on the rotating shaft 21 and matched with the helical gear 26 to form a whole, the helical gear 26 and the rotating shaft 21 move together by means of friction conduction force of the helical gear 26 and the clutch pressing block 25, the U-shaped clamp 23 is further installed behind the clutch pressing block 25, the gasket is installed on the U-shaped clamp 23, the spring 24 is installed on the gasket, the spring 24 is assembled by the U-shaped clamp 23 and compresses the spring 24 to provide pre-tightening force for the clutch pressing block 25 and the helical gear 26, the helical gear outer 26 is connected with a multi-stage worm 271, the multi-stage worm 271 can be driven by a turnover motor 27 to control rotation, when the turnover motor 27 drives the display screen 6 to turn over, the display screen 6 is more smoothly and the technological sense is improved.

In this embodiment, a boss 261 is provided on the helical gear 26, a groove is provided on the clutch pressing block 2525, a friction force exists between the boss 261 of the helical gear 26 and the groove of the clutch pressing block 25, and the thrust of the flipping motor 27 is smaller than the maximum static friction between the boss 261 of the helical gear 26 and the groove of the clutch pressing block 25.

The contact surface between the groove of the clutch pressing block 25 and the boss 261 of the helical gear 26 is a rough structure, the two are tightly pressed together due to the pre-tightening force provided by the spring 24 to generate a friction force, the flip motor 27 pushes the helical gear 26 through the multistage worm 271 in a normal state, the helical gear 26 and the rotating shaft 21 are integrated due to the pressing of the clutch pressing block 25, so that the helical gear 26 drives the rotating shaft 21 to rotate, the thrust force of the flip motor 27 is smaller than the maximum static friction between the helical gear 26 and the clutch pressing block 25, when an external strong external force is applied, the force is larger than the maximum static friction between the boss 261 of the helical gear 26 and the groove of the clutch pressing block 25, the boss 261 of the helical gear 26 slides out from the groove of the clutch pressing block 25, so that the clutch pressing block 25 and the helical gear 26 can move relatively, the movement of the rotating shaft 21 is not limited by the helical gear 26, the rotating shaft 21 rotates along with the external force, and the external force is eliminated to press the mechanism and the display screen 6, thereby protecting the system mechanism and the display screen 6.

It should be noted that, in this embodiment, a clamping groove 231 is arranged on the rotating shaft 22, the U-shaped clamp 23 is installed in the clamping groove 231, the clamping groove 231 is arranged on the rotating shaft 21, the U-shaped clamp 23 is installed in the clamping groove 231, the gasket is installed on the U-shaped clamp 231, the spring 24 compresses the clutch pressing block 25 and the helical gear 26 and provides a pre-tightening force, a display screen installing support is arranged at the end of the rotating shaft 21, a protruding strip 211 is further arranged on the rotating shaft 21, a sliding groove is arranged in the clutch pressing block 25, and the sliding groove is installed on the protruding strip 211.

The front end of the rotating shaft is also provided with a clamping groove 231, the U-shaped clamp 23 can be conveniently and quickly arranged in the clamping groove 231, a gasket is further arranged above the U-shaped clamp 23 and used for pressing the spring 24 to deform and providing pre-tightening force, the tail end of the rotating shaft 21 is also provided with a display screen mounting support, the display screen 6 can be conveniently and quickly mounted on the display screen mounting support and rotates along with the rotation of the rotating shaft 21, the rotating shaft 21 is also provided with a plurality of convex strips 211, the clutch pressing block 25 is provided with a sliding groove matched with the convex strips 211 and is assembled together, and the clutch pressing block 25 receives the force transmitted to the helical gear 26 by the overturning motor 27 and transmits the force to the rotating shaft 21 through the convex strips 211 to drive the rotating shaft 21 to rotate.

It should be noted that, in this embodiment, the locking assembly 3 includes a locking base 35, a locking motor 34 installed on the locking base 35, and a rack 31 driven by the locking motor 34, and the display screen 6 has a locking stopper matching with the rack 31.

In order to ensure the stability and the safety of the display screen 6, the support 1 is also provided with a locking assembly 3, after the display screen 6 is reset and closed, the locking assembly 3 locks the display screen 6 on the support 1, and the damage caused by vibration can be effectively reduced, and the display screen 6 can be prevented from being stolen. Locking subassembly 3 mainly comprises locking base 35, locking enclosing cover 351, the locking motor 34 of installing on locking base 35 and rack 34, and locking motor 34 can drive rack 31 and stretch out and retract, and the cooperation is gone up the hasp dog behind display screen 6, can reset when closing display screen 6 and lock display screen 6 on support 1.

It should be noted that, in this embodiment, the locking motor 34 controls the rack 31 to extend and retract through an execution gear assembly, the execution gear assembly includes a worm 36, three sets of dual gears, and teeth arranged on the rack 31, the worm 36 is fixed on the locking motor 34, the dual gears are mounted on the locking base 35 and sequentially engaged, the worm 34 is engaged with the first set of dual gears 37, and the teeth are engaged with the third set of dual gears 39.

In order to achieve the purposes of saving space and enabling transmission to be more stable, the locking motor 34 controls the rack 31 through an execution gear assembly, the execution gear assembly comprises a worm 36 installed on an output shaft of the locking motor 34, three groups of duplicate gears and teeth fixed at the rear end of the rack 31, the worm 36 receives torque output by the locking motor 34 and transmits the torque to a worm wheel on a first group of duplicate gears 37, a pinion on the first group of duplicate gears 37 is meshed with a bull gear of a second group of duplicate gears 38 and transmits the torque to the second group of duplicate gears 38, a pinion on the second group of duplicate gears 38 is meshed with a bull gear of a third group of duplicate gears 39 and transmits the torque to the third group of duplicate gears 39, the teeth are meshed with pinions of the third group of duplicate gears 39 to convert the torque into thrust, rotation speed vibration between the gears can be reduced step by step through alternation of the bull and pinion of the duplicate gears, and vibration of a system of the locking assembly 3 is reduced, and extension of the rack 31 is enabled to be more stable.

In this embodiment, the locking base 35 is further provided with a sliding slot 33, and the rack 31 is installed in the sliding slot 33.

A sliding groove 33 is formed in the locking base 35, and the teeth and the rack 31 are installed in the sliding groove 33 and can slide along the sliding groove 33, so that the rack 31 can be accurately inserted into a lock stop of the display screen 6 when extending out.

Locking subassembly 3 has two sets ofly, and two sets of locking subassemblies 3 symmetry set up the both sides at display screen 6.

The locking assemblies 3 on the support 1 are arranged in two groups, the two groups are arranged on two sides of the display screen 6 in a bilateral symmetry mode, and the display screen 6 can be firmly locked from two sides.

It should be noted that, in this embodiment, the supporting component 4 is installed opposite to the flipping component 2, and the two rotating shafts 22 are in the same horizontal plane.

The rotating shaft 22 and the rotating shaft 22 of the turnover component 2 are in the same horizontal line, and both can rotate simultaneously.

Note that, in this embodiment, the support 1 includes a key assembly 5.

Still be equipped with button subassembly 5 on support 1, the passenger can use the 6 rotation angle of button control display screen according to the demand of difference.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The utility model provides a vehicle-mounted back row display screen tilting mechanism, includes the support, installs locking subassembly on the support, installs upset subassembly on the support, installs the supporting component on the support, by the display screen of upset subassembly drive upset, the supporting component is including supporting the base, installing the pivot on supporting the base, the upset subassembly includes the upset base, installs the upset motor on the upset base, installs by upset motor drive's multistage worm and by multistage worm drive's separation and reunion subassembly on the upset base, the pivot is receiving powerful exogenic action time, pivot disconnection and helical gear and hinge's fixed connection to unload the exogenic force.

2. The turnover mechanism for the vehicle-mounted rear row display screen of claim 1, wherein the clutch assembly comprises a helical gear mounted on the rotating shaft, a clutch pressing block connected with the helical gear and assembled on the rotating shaft, a spring for pressing the helical gear and the clutch pressing block, and a U-shaped clamp mounted on the rotating shaft, wherein a gasket is mounted between the U-shaped clamp and the spring, and the helical gear is indirectly driven by the turnover motor.

3. The turnover mechanism for the vehicle-mounted rear row display screen of claim 2, wherein the helical gear is provided with a boss, the clutch pressing block is provided with a groove, friction force exists between the helical gear boss and the clutch pressing block groove, and the thrust of the turnover motor is smaller than the maximum static friction between the helical gear and the clutch pressing block.

4. The turnover mechanism for the rear row of display screens on the vehicle of claim 2, wherein the rotating shaft is provided with a slot, the U-shaped clamp is arranged in the slot, the gasket is arranged on a compression spring on the U-shaped clamp, the spring compresses the clutch pressing block and the helical gear and provides pre-tightening force, the tail end of the rotating shaft is provided with a display screen mounting bracket, the rotating shaft is further provided with a convex strip, the inner surface of the clutch pressing block is provided with a sliding groove, and the sliding groove is arranged on the convex strip.

5. The turnover mechanism for the vehicle-mounted rear-row display screen of claim 1, wherein the locking assembly comprises a locking base, a locking motor installed on the locking base, and a rack driven by the locking motor, and a locking stopper matched with the rack is arranged on the display screen.

6. The turnover mechanism for the vehicle-mounted rear row display screen according to claim 5, wherein the locking motor controls the rack to extend and retract through an execution gear assembly, the execution gear assembly comprises a worm, a duplex gear assembly connected with the worm, and a rack meshed with the duplex gear assembly, the worm is fixed on the locking motor, the duplex gear is mounted on the base and sequentially meshed, the worm is meshed with the duplex gear, and the rack is meshed with the duplex gear.

7. The turnover mechanism for the vehicle-mounted rear row display screen of claim 6, wherein the locking base is provided with a sliding groove, and the rack is installed in the sliding groove.

8. The turnover mechanism for the vehicle-mounted rear-row display screen is characterized in that the two groups of locking assemblies are symmetrically arranged on two sides of the display screen.

9. The turnover mechanism for the vehicle-mounted rear row display screen of claim 1, wherein the support assembly is installed opposite to the turnover assembly, and rotating shafts of the support assembly and the turnover assembly are in the same horizontal plane.

10. The turnover mechanism for vehicle-mounted rear display screens of claim 1, wherein the bracket comprises a key assembly.

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