CN109027579B

CN109027579B - Angle adjusting mechanism and angle adjusting device

Info

Publication number: CN109027579B
Application number: CN201810975887.4A
Authority: CN
Inventors: 李志鹏
Original assignee: Goertek Techology Co Ltd
Current assignee: Goertek Techology Co Ltd
Priority date: 2018-08-24
Filing date: 2018-08-24
Publication date: 2021-06-11
Anticipated expiration: 2038-08-24
Also published as: CN109027579A

Abstract

The present invention relates to an angle adjusting mechanism and an angle adjusting device. Angle adjustment mechanism includes support, branch, drive shaft, ratchet subassembly, rotates plummer and the slider of being connected respectively with the both ends of branch, the plummer is keeping away from the direction one end of branch be provided with the first rotation portion that the support rotates to be connected, the one end of drive shaft with the slider transmission is connected and can be driven the slider slides, along with the slip of slider, the slider drives branch promotes the plummer uses first rotation portion to rotate as the axle, makes contained angle increase between plummer and the slider slip direction perhaps reduces, the ratchet subassembly passes through the locking drive shaft or slider are spacing the position of slider. One technical effect of the invention is that the angle adjustment mechanism of the invention is relatively smooth during angle adjustment.

Description

Angle adjusting mechanism and angle adjusting device

Technical Field

The invention relates to the technical field of machinery, in particular to an angle adjusting mechanism and an angle adjusting device.

Background

In life and production, the angle fine adjustment of equipment and products is often carried out, but the adjustment precision of a common angle adjusting mechanism in the prior art is poor, and the use effect experience is poor. For example, the problem of adjusting the angle of the projector is often encountered when the projector is used, in order to align the up-down projection position of the projector, the up-down angle is often adjusted and corrected manually, and in the adjusting process, the end of the front projector is directly lifted up manually and manually to be adjusted, so that severe shaking is easily generated, certain impact is caused to the vision of people, and the experience of an observer is influenced; meanwhile, when the projector is adjusted, two angle adjusting screws positioned at two angular positions at the front end of the projector need to be adjusted respectively, repeated correction is needed for multiple times, the use requirement can be met, the adjusting precision is poor, and a large amount of time and energy are consumed.

Accordingly, there is a need for an improved angle adjustment mechanism.

Disclosure of Invention

An object of the present invention is to provide a new technical solution of an angle adjusting mechanism, at least for solving the shaking problem when the angle of the projector is adjusted.

According to one aspect of the invention, the angle adjusting mechanism comprises a support, a support rod, a driving shaft, a ratchet wheel assembly, a bearing platform and a sliding block, wherein the bearing platform and the sliding block are respectively connected with two ends of the support rod in a rotating mode, one end of the bearing platform in the direction far away from the support rod is provided with a first rotating portion which is connected with the support rod in a rotating mode, one end of the driving shaft is connected with the sliding block in a transmission mode and can drive the sliding block to slide, the sliding block drives the support rod to push the bearing platform to rotate by taking the first rotating portion as an axis along with the sliding of the sliding block, so that an included angle between the bearing platform and the sliding block in the sliding direction is increased or reduced, and the ratchet wheel assembly limits the position.

Optionally, one end of the driving shaft is provided with a driving gear, and one side of the slider is provided with a first rack engaged with the driving gear along the sliding direction.

Optionally, the sliding block further comprises a first elastic member, one end of the first elastic member is connected with the sliding block and can drive the sliding block, and the ratchet assembly locks the ratchet wheel to prevent the first elastic member from driving the sliding block to slide.

Optionally, the ratchet assembly includes a ratchet wheel, a pawl, a second elastic member and a toggle member, the second elastic member and the toggle member are respectively connected to the pawl, the ratchet wheel is disposed on the driving shaft, the pawl is engaged with the ratchet wheel, the toggle member drives the pawl to rotate in a forward direction, the second elastic member drives the pawl to rotate in a reverse direction, the pawl is limited to a position where the pawl rotates in the reverse direction, and the pawl locks the ratchet wheel when limited.

Optionally, the pawl includes a second rotating portion, and a locking portion and a toggle portion that are disposed around the second rotating portion, the pawl rotates around the second rotating portion, the locking portion abuts against the ratchet wheel to lock the ratchet wheel to rotate, the second elastic member is connected to the locking portion, and the toggle member is connected to the toggle portion.

Optionally, the sliding block further comprises a damping gear and a second rack engaged with the damping gear, the second rack is fixed on the bracket and parallel to the sliding direction of the sliding block, and the damping gear is rotatably connected with one side of the sliding block.

Optionally, the device further comprises a slide rail, and the slide block is arranged on the slide rail and slides along the guide of the slide rail.

Optionally, the sliding block further comprises a limiting component, and when the direction from the sliding block to the two ends of the supporting rod along one direction is coincident with the gravity direction, the limiting component limits the sliding block to continuously slide along the direction.

According to another aspect of the invention, the invention also provides an angle adjusting device, which comprises the angle adjusting mechanism.

Optionally, the ratchet mechanism further comprises a casing with a top plate, the support is fixedly arranged on the casing, the plummer is the whole or partial top plate, the slider is slidably arranged on a bottom plate of the casing, the support rod is positioned between the slider and the plummer, the driving shaft penetrates through the casing and is in transmission connection with the slider, and the ratchet assembly is arranged in the casing and is respectively connected with the driving shaft and the casing.

One technical effect of the invention is that the angle adjustment mechanism of the invention is relatively smooth during angle adjustment. In addition, the setting angle adjustment range and the setting angle adjustment precision range of the structural parameters can be adjusted according to needs.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic diagram of a use state configuration of some embodiments.

FIG. 2 is a side view schematic of some embodiments.

Fig. 3 is an exploded schematic view of some embodiments of the structure.

Fig. 4 is a schematic view of the connection of the angle adjusting mechanism in some embodiments.

Fig. 5 is a partially enlarged schematic view at a in fig. 4.

Fig. 6 is a schematic structural view of a stent in some embodiments.

In the figure: the automatic bearing device comprises a support 1, 11 second racks, 12 sliding rails, 13 side walls, 14 limiting sliding chutes, sliding

clamping grooves

15, 2 supporting rods, 3 bearing tables, 31 first rotating parts, 4 sliding blocks, 41 first racks, 42 damping gears, 43 limiting parts, 5 driving shafts, 51 ratchet wheels, 52 driving gears, 6 ratchet wheel assemblies, 61 pawls, 611 second rotating parts, 612 locking parts, 613 shifting parts, 62 second elastic pieces, 63 shifting pieces and 7 first elastic pieces.

Detailed Description

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.

In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

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, further discussion thereof is not required in subsequent figures.

An angle adjustment mechanism is provided, in some embodiments, as shown in fig. 1-6, comprising a bracket 1, a strut 2, a bearing platform 3, a slider 4, a drive shaft 5, and a ratchet assembly 6.

Two ends of the supporting rod 2 are respectively connected with the bearing table 3 and the sliding block 4 in a rotating mode. One end of the bearing table 3 far away from the support rod 2 is provided with a first rotating part 31, and the bearing table 3 is rotatably connected with the support 1 through the first rotating part 31. The axial directions of the rotary connection positions are parallel to each other. The support 1 is used for fixing one end of the bearing table 3, so that the bearing table 3 can only rotate relative to the support 1. The sliding block 4 is arranged below the bearing table 3 in a sliding mode, and the sliding direction of the sliding block 4 is perpendicular to the axial direction of the rotary connecting position. Will slider 4's slip direction is regarded as the level, along with slider 4's slip, because branch 2 both ends respectively with plummer 3 and slider 4 rotate to be connected, through the rigidity of branch 3 itself, slider 4 can drive branch 2 takes place to rotate, first rotation portion 31 is relatively fixed, and then branch 2 can promote plummer 3 uses first rotation portion 31 to rotate as the axle, makes contained angle increase or reduction between plummer 3 and the 4 slip directions of slider. Taking the example that the included angle between the sliding directions of the plummer 3 and the sliding block 4 is increased when the sliding block 4 slides, the sliding block 4 applies acting force in the horizontal direction to one end of the support rod 2 connected with the sliding block 4; the other end of the strut 2 is rotatably connected with the bearing platform 3, and the acting force can be decomposed into an upward force and a horizontal force when being decomposed and transmitted to the joint of the strut 2 and the bearing platform 3 through the rigidity of the strut 3; the other end of the bearing table 3 is rotatably connected and fixed with the bracket 1, so that the horizontal force is counteracted by the reaction force of the bracket 1; the bearing table 3 is driven to rotate by upward force by taking the first rotating part 31 as an axis, and one end of the support rod 2 connected with the bearing table 3 moves upwards in the vertical direction; the limit of the sliding block 4 and one end of the support rod 2 connected with the sliding block 4 can not move in the vertical direction and can only move horizontally, and according to the pythagorean theorem, a right triangle taking the support rod 3 as a hypotenuse continuously increases along with the height and the angle; at most, the bevel edge and the high edge are coincident. Some equipment needing angle adjustment, such as display equipment like a projector and the like, is placed on the bearing table 3, the sliding block 4 is driven, and the bearing table 3 can drive the equipment to change the angle.

One end of the driving shaft 5 is in transmission connection with the sliding block 4, and the driving shaft 5 can drive the sliding block 4 to slide along the sliding direction. The ratchet assembly 6 can limit the position of the sliding block 4 by locking the driving shaft 5, so that the angular position of the bearing table 3 can be maintained after the angle adjustment is completed. For example, after the angle adjustment is completed, the sliding block 4, under the action of an external force or gravity transmitted by the bearing table 3 or the like, can drive the sliding block 4 to slide in a direction in which an included angle between the bearing table 3 and the sliding block 4 is reduced, and further can drive the driving shaft 5 to rotate through transmission connection, and the driving shaft 5 is locked by the ratchet wheel assembly 6, so that the rotation direction of the driving shaft 5 is limited, and the position of the sliding block 4 is further limited due to the connection relation of the transmission connection. When the angle needs to be adjusted, the ratchet wheel assembly 6 can be rotated in the direction that the driving shaft 5 is not locked, or the locking of the driving shaft 5 by the ratchet wheel assembly 6 is released, and then the adjustment is carried out. The ratchet wheel component 6 can be an external engagement ratchet wheel structure or an internal engagement ratchet wheel structure.

In the angle adjusting process, particularly in the process of adjusting and increasing the angle, the sliding block 4 is driven to slide along with the rotation of the rotating shaft 5, so that the bearing table 3 can be pushed by the support rod 2 to integrally rotate upwards, then a projector and other equipment are placed on the bearing table 3, the projector also integrally rotates along with the rotation of the bearing table 3, the purpose of angle adjustment is achieved, the front end of the projector does not need to be lifted up to adjust adjusting screws at two angular positions, and the front end of the projector can be prevented from being lifted up during adjustment to cause visual impact on human eyes; on the other hand, the rotation of the driving shaft for driving belongs to stepless speed change, and the speed of angle adjustment can be controlled according to needs, so that the angle adjustment speed is controlled within the variation range received by human eyes, and the visual impact of a picture on the human eyes caused by the over-fast angle adjustment can be prevented; the position of the limiting slide block 4 of the driving shaft 5 is locked by the ratchet wheel assembly 6, the ratchet wheel does not rotate one tooth and can be locked timely, after the angle is adjusted to a proper position, the bearing platform 3 can be prevented from moving downwards under the action of the projector and the gravity of the projector, and the locking is timely and stable, so that the picture can not shake. The projector only needs to adjust the adjusting screws of the two corners to be equal in height in advance, and the projector is usually adjusted to be equal in height at the lowest position. Therefore, the angle adjusting mechanism can be applied to application scenes needing to adjust the angle stably, and is relatively stable during angle adjustment. And when the angle reaches the ideal angle, the holding position can be automatically locked, and the operation is simple.

In addition, the angle adjustment range of the present configuration can be set by setting the length of the stay 2 and the length from the position of connection between the stay 2 and the platform 3 to the position of the first rotating portion 41. Also because the moving distance of the sliding block 3 has a proportional relation with the adjusted angle, the precision range of the angle adjustment can be set by setting the relation between the tooth pitch in the ratchet wheel assembly 6 and the sliding distance of the sliding block 3 under the unit tooth pitch, for example, under the condition that the transmission ratio between the driving shaft 5 and the sliding block 4 is not changed, the parameters such as the diameter, the tooth number and the like of the ratchet wheel in the ratchet wheel assembly 6 are increased to improve the angle adjustment precision of the invention; and the precision is changed by replacing the ratchet wheel or the ratchet wheel component; the method is suitable for the application scene of angle fine adjustment. The selection of the ratchet tooth shape, the determination of the module tooth number, the determination of the tooth surface inclination angle, and the adjustment method of the stroke and the dynamic stop ratio are taken as the prior art and are not described again.

In some other embodiments, the sliding block 4 may further be provided with a tooth-type ratchet structure to limit the position of the sliding block 4, and the adjustment precision may be smaller than that of the external and internal ratchet structures provided on the driving shaft 5, the tooth-type ratchet structure can only increase the precision by increasing the number of teeth per unit length, and the external and internal ratchet structures can adjust the precision to be higher by adjusting various parameters of the driving shaft 5, such as the transmission ratio, the size of the ratchet wheel, and the number of teeth, but the tooth-type ratchet structure may also implement the present invention, and therefore, the present application is not limited thereto.

The ratchet assembly 6 at least locks the ratchet 51 to rotate in one direction, that is, locks the ratchet 51 to rotate clockwise or/and counterclockwise, or can lock in two directions, which is not limited in the present application and can be selected by those skilled in the art as required. When the ratchet wheel 51 rotates only in one direction and cannot return the slider 4 to the initial position for resetting or when the ratchet wheel 51 is locked in both directions, the ratchet wheel assembly 6 may be configured to be unlocked, and by unlocking, the driving shaft 5 may be controlled to rotate for angle adjustment, or the slider 4 may be reset by manually pressing the carrier table 3, or under the action of gravity of the carrier table 3, or by driving of other force applying mechanisms.

In some embodiments, the first rotating portion 31 and the supporting rod 2 are respectively close to or located at two ends of the bearing platform 3, and the initial position may be that the sliding block 4 and one end of the supporting rod connected with the sliding block 4 are located in a direction close to the first connecting portion, so that the structure of the present invention is approximately folded and is more compact. Further, the plummer 3 may be set to be an initial position when being parallel to the sliding direction of the slider 4.

In some embodiments, as shown in fig. 1-4, the drive shaft 5 and the slide block 4 are geared by a gear and rack. One end of the driving shaft 5 is provided with a driving gear 52, one side of the sliding block 4 is provided with a first rack 41 engaged with the driving gear 52 along the sliding direction, and the sliding block 4 can be driven to slide by rotating the gear 52. The driving gear 52 and the first rack 41 are in meshed transmission, the structure is simple, the number of parts is small, compared with the structure that one end of the driving shaft 5 is provided with an eccentric wheel or an arc-shaped plectrum and the like to drive the sliding block 4, when the angle adjusting ranges are the same, the size of the structure of the driving gear 52 and the first rack 41 in meshed transmission can be smaller, and the angle adjusting range of the angle adjusting mechanism can be controlled by adjusting the length of the first rack 41; on the other hand, the precision of angle adjustment can be effectively improved by reducing the diameter of the driving gear 52; on the other hand, compared with the case of adopting a cord for traction transmission, the meshing transmission is rigid transmission connection, for example, when the driving shaft 5 is not used for rotation driving, but the plummer is directly and manually lifted to carry out quick rough adjustment, the whole structure is in bidirectional linkage through the meshing transmission, the sliding block 4 is conveniently locked through the ratchet wheel assembly 6, and compared with the case that the transmission modes such as eccentric shaft shifting or cord traction cannot generate linkage, or a large number of other component structures are required to realize bidirectional linkage, the meshing transmission is more direct and efficient. It will be understood by those skilled in the art that this is only a preferred embodiment of the present application and is not a limitation of the present application, and those skilled in the art can design other transmission modes as required and the present application is not limited thereto.

In some embodiments, as shown in fig. 1-4, the angle adjustment mechanism further comprises a first resilient member 7. One end of the first elastic piece 7 is connected with the sliding block 4, and the other end of the first elastic piece 7 is fixed in the bracket 1. The first elastic member 7 applies a force to the slider 4 to drive the slider 4 to slide in the sliding direction. The ratchet assembly 6 is configured to block the first elastic member 7 from driving the sliding block 4 to slide by locking the ratchet 51. The first elastic member 7 may be configured to drive the sliding block 4 to move to the initial position, for example, the first elastic member 7 drives the sliding block 4 to slide in a direction that the included angle between the plummer 3 and the sliding block 4 is reduced, and when the ratchet assembly 6 is unlocked, the sliding block 4 can automatically move to the reset position. In some other embodiments, the first elastic element 7 may not be provided, but may be reset by the gravity of the carrier 3.

In some embodiments, as shown in FIG. 5, the ratchet assembly 6 is an external engagement ratchet structure that facilitates disassembly for installation and maintenance. The ratchet assembly 6 comprises a ratchet 51, a pawl 61, a second elastic member 62 and a toggle member 63 which are respectively connected with the pawl 61. The ratchet wheel 51 may be provided on the drive shaft 5 at a position remote from the slider 4, near the other end of the drive shaft 5. The pawl 61 engages the ratchet wheel 51. The pawl 61 is rotatably disposed. The pawl 61, the second elastic member 62 and the toggle member 63 may be provided on the bracket 1. When the toggle member 63 slides due to an external force, for example, when manually pushed, the toggle member 63 can also drive the pawl 61 to rotate in the forward direction. The second elastic member 62 drives the pawl 61 to rotate in the opposite direction, that is, the rotating force generated by the toggle member 63 and the second elastic member 62 driving the pawl 61 is in the opposite direction. The toggle member 63 may limit a position where the pawl 61 rotates in a reverse direction, or a bracket, a structure capable of limiting the pawl 61 is disposed on the bracket, and the like to limit a position where the pawl 61 rotates in a reverse direction, so that when the toggle member 63 limits the pawl 61, the pawl 61 and the ratchet wheel 51 keep a meshing relationship, the pawl 61 can lock the ratchet wheel 51, and a locking fit relationship in the ratchet wheel assembly 6 can be ensured to be stable through the limitation of the toggle member 63. When the pawl 61 is rotated forward to disengage the ratchet wheel 51, the drive shaft 5 can be unlocked. When the poking piece 63 drives the pawl 61 to rotate in the forward direction, the second elastic piece 62 is compressed or stretched; when the external force of the toggle piece 63 driving the pawl 61 to rotate in the forward direction disappears, the second elastic piece 62 can drive the pawl 61 to return to the locking position limited by the toggle piece 63.

Further, the pawl 61 includes a second rotating portion 611, and a locking portion 612 and a toggle portion 613 which are provided around the second rotating portion 611. The pawl 61 rotates about the second rotating portion 611. The locking portion 612 abuts against the ratchet 51 to lock the ratchet 51 from rotating. One end of the locking portion 612, which abuts against the ratchet 51, may be in a hook shape. The second elastic member 62 is connected to the locking portion 612, and the toggle member 63 is connected to the toggle portion 613. The second elastic member 62 and the toggle member 63 may be located on the same side of the pawl 61. Further, the rotating portion may be located between the second elastic member 62 and the toggle member 63, so that the ratchet assembly 6 has a compact structure and occupies a small space.

In some embodiments, as shown in fig. 1-6, the angle adjustment mechanism further includes a damping gear 42 and a second rack 11 meshed with the damping gear 42. The second rack 11 is fixed on the bracket 1. The second rack 11 is parallel to the sliding direction of the slider 4. The damping gear 42 is rotatably connected to one side of the slider 4, and the gear 42 rolls in mesh with the second rack 11 as the slider 4 slides. The damping gear 42 is in interference fit with the slider 4, so that a person skilled in the art can control the moving speed of the slider 4 and improve the adjusting hand feeling when using the invention. Particularly, after the locking of the ratchet wheel assembly 6 is released, the sliding block 4 is prevented from moving rapidly, and violent vibration and impact are caused to the bearing table 3 or equipment on the bearing table 3, so that the durability of the invention can be improved.

In some embodiments, as shown in fig. 1-6, the angle adjustment mechanism further includes a slide rail 12. The slide rail 12 is arranged on the support 1. The sliding block 4 is arranged on the sliding rail 12 and slides along the guide of the sliding rail 12, and the sliding direction of the sliding block 4 is limited, so that the structure of the invention runs smoothly. Further, the slide rail 12 has two opposite side walls 13, a protruding limiting portion 43 is arranged on the slide block 4, a limiting sliding groove 14 with the same guiding direction as the slide rail 12 is arranged on the side wall 13, and the limiting portion 43 is clamped into the limiting sliding groove 14. Still further, the damping gear 42 may be disposed outside the side wall and rotatably connected to one of the limiting portions 43. The side wall 13 may further be provided with a sliding slot 15 opened at one end of the side wall 13, for accommodating the first rack 41 to slide in the sliding slot 15, and a portion engaged with the driving gear 52 is located outside the side wall 13.

In some embodiments, the angle adjusting mechanism further includes a limiting component, when the sliding block 4 slides along a direction until the two ends of the supporting rod 2 coincide with the gravity direction, the limiting component limits the sliding block 4 to continue sliding along the direction. The limiting component can be a baffle protruding from the bracket 1, or the matching between the limiting part 43 on the sliding block 4 and the limiting sliding groove 14. When the ratchet wheel component 6 is in one-way locking, the locking failure of the ratchet wheel component 6 caused by the change of the stress direction of the sliding block 4 under the action of gravity can be prevented, and the ratchet wheel component cannot be limited. On the other hand, when the sliding direction of the slider 4 is horizontal, the strut 2 is perpendicular to the sliding direction of the slider 4, and the maximum value of the adjustable angle is reached. It will be appreciated by those skilled in the art that when the ratchet assembly 6 is bi-directionally locked, the stop assembly may no longer be provided.

According to another aspect of the present invention, there is also provided an angle adjusting apparatus including the above-described angle adjusting mechanism provided for angle adjustment. In some embodiments, the carrier tray may be a housing of some device requiring angular adjustment, such as a bottom housing of a projector device, and the bracket, the support rod, the slider, the driving shaft, and the ratchet assembly are disposed in the bracket by disposing a bracket.

In some embodiments, the angle adjustment device may be provided as a separate device for adjusting the angle. As shown in fig. 1-6, the angle adjustment apparatus further includes a housing having a top plate. The support 1 is fixedly arranged on the shell, the support can be fixedly connected through clamping, welding and other modes, the support 1 and the shell are integrally formed, namely, the shell is the support 1. The bearing table 3 can be a whole top plate or a part of top plate of the shell and is rotatably connected with the bracket 1. The sliding block 4 is arranged on the bottom plate of the shell in a sliding mode. The supporting rod 2 is positioned between the sliding block 2 and the bearing platform 3. The driving shaft 5 penetrates through the shell and is in transmission connection with the sliding block 4, namely, one end, far away from the sliding block 4, of the driving shaft 5 extends out of the shell, so that a user can adjust the driving shaft conveniently. The ratchet wheel assembly 6 is arranged in the shell and is respectively connected with the driving shaft and the shell; the ratchet assembly 6 may be divided into two parts, one part is arranged on the housing for fixing, and the other part rotates along with the driving shaft 5 and is matched with the driving shaft for locking.

Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for the purpose of illustration and is not intended to limit the scope of the invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. An angle adjusting mechanism is characterized by comprising a support, a support rod, a driving shaft, a ratchet wheel assembly, a bearing platform, a sliding block and a limiting assembly, wherein the bearing platform and the sliding block are respectively and rotatably connected with two ends of the support rod;

the ratchet wheel component at least locks the ratchet wheel to rotate towards one direction;

when the direction from the sliding block to the two ends of the supporting rod along one direction is coincident with the gravity direction, the limiting assembly limits the sliding block to continuously slide along the direction;

the sliding block is arranged on the sliding rail and slides along the guide of the sliding rail.

2. The angle adjusting mechanism according to claim 1, wherein one end of the driving shaft is provided with a driving gear, and one side of the slider is provided with a first rack gear engaged with the driving gear in a sliding direction.

3. The angle adjustment mechanism of claim 1, further comprising a first elastic member having one end connected to the slider and capable of driving the slider, wherein the ratchet assembly locks the ratchet to prevent the first elastic member from driving the slider to slide.

4. The angle adjustment mechanism of claim 1, wherein the ratchet assembly comprises a ratchet wheel disposed on the drive shaft, a pawl engaged with the ratchet wheel, a second elastic member and a toggle member respectively connected to the pawl, the toggle member driving the pawl to rotate in a forward direction, the second elastic member driving the pawl to rotate in a reverse direction, the pawl being restrained in a reverse rotation position and the pawl locking the ratchet wheel when restrained.

5. The angle adjusting mechanism of claim 4, wherein the pawl includes a second rotating portion, and a locking portion and a toggle portion disposed around the second rotating portion, the pawl rotates around the second rotating portion, the locking portion abuts against the ratchet wheel to lock the ratchet wheel to rotate, the second elastic member is connected to the locking portion, and the toggle member is connected to the toggle portion.

6. The angle adjustment mechanism of claim 1, further comprising a damping gear and a second rack engaged with the damping gear, the second rack being fixed to the bracket and parallel to the sliding direction of the slider, the damping gear being rotatably connected to one side of the slider.

7. An angle adjusting apparatus, characterized by comprising an angle adjusting mechanism according to any one of claims 1 to 6.

8. The angle adjusting device of claim 7, further comprising a housing having a top plate, wherein the bracket is fixedly disposed on the housing, the top plate is disposed on all or a portion of the carrier, the slider is slidably disposed on a bottom plate of the housing, the support rod is disposed between the slider and the carrier, the driving shaft penetrates the housing and is in transmission connection with the slider, and the ratchet assembly is disposed in the housing and is respectively connected with the driving shaft and the housing.