CN115199872A - Support mechanism and projector adopting same - Google Patents
Support mechanism and projector adopting same Download PDFInfo
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- CN115199872A CN115199872A CN202110394037.7A CN202110394037A CN115199872A CN 115199872 A CN115199872 A CN 115199872A CN 202110394037 A CN202110394037 A CN 202110394037A CN 115199872 A CN115199872 A CN 115199872A
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- limiting
- transmission
- driving mechanism
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- 230000007246 mechanism Effects 0.000 title claims abstract description 108
- 230000005540 biological transmission Effects 0.000 claims abstract description 62
- 238000013016 damping Methods 0.000 claims abstract description 42
- 230000033001 locomotion Effects 0.000 claims description 12
- 230000009471 action Effects 0.000 abstract description 2
- 210000000078 claw Anatomy 0.000 description 7
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 125000003003 spiro group Chemical group 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/129—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon characterised by friction-damping means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/129—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon characterised by friction-damping means
- F16F15/1297—Overload protection, i.e. means for limiting torque
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/04—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand
- F16M11/06—Means for attachment of apparatus; Means allowing adjustment of the apparatus relatively to the stand allowing pivoting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/02—Heads
- F16M11/18—Heads with mechanism for moving the apparatus relatively to the stand
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a support mechanism and a projector adopting the same, and the support mechanism comprises a driving mechanism, a transmission assembly and a support, wherein the driving mechanism drives the support to expand or retract through the transmission assembly, the transmission assembly comprises a first part and a second part, the driving mechanism is connected with the first part, the support is connected with the second part, a preset damping is arranged between the first part and the second part, the first part and the second part are relatively fixed for transmission when the external acting force is smaller than or equal to the preset damping, and the first part and the second part move relatively to disconnect the transmission when the external acting force is larger than the preset damping. The bracket mechanism can be automatically opened and closed, has good impact protection, can be collapsed, absorb energy and recover to avoid damage when falling and mispressing, can avoid the transmission of impact force to the driving mechanism, can avoid the damage of the driving mechanism due to the impact action force, improves the use reliability of the bracket mechanism and prolongs the service life.
Description
Technical Field
The invention relates to the technical field of equipment supporting structures, in particular to a support mechanism and a projector adopting the same.
Background
Equipment, article etc. can set up the support that is used for the support, in order to improve the convenience, can adopt automatic switching support, need not artifical manually operation, automatic switching support can adopt electric putter usually, the cylinder, the actuating mechanism of driving support switching is come as to the motor, actuating mechanism drives the support switching through drive mechanism, nevertheless in the use, the easy appearance falls, situations such as mistake pressure, automatic switching support can receive the impact, thereby can lead to actuating mechanism, drive mechanism and support are impaired, it is with high costs to maintain the change.
Disclosure of Invention
The invention aims to solve the technical problems and provide a bracket mechanism which aims to improve the prior art and solve the problem that a driving mechanism, a transmission mechanism and a bracket of the bracket are easy to damage when falling and mistakenly pressing are encountered in the prior art.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a support mechanism comprises a driving mechanism, a transmission assembly and a support, wherein the driving mechanism drives the support to expand or retract through the transmission assembly, the transmission assembly comprises a first component and a second component, the driving mechanism is connected with the first component, the support is connected with the second component, a preset damping is arranged between the first component and the second component, the first component and the second component are relatively fixed for transmission when external acting force is smaller than or equal to the preset damping, and the first component and the second component move relatively for disconnection of transmission when the external acting force is larger than the preset damping. The support mechanism disclosed by the invention can automatically open and close the support by utilizing the driving mechanism, meanwhile, the self protection of the support mechanism is effectively improved, in a normal use condition, the acting force between the first component and the second component is smaller than the preset damping, so that the first component and the second component are relatively fixed and can reliably rotate, the driving mechanism can reliably drive the support to unfold and retract through the transmission assembly, and in a falling and error pressing condition, the support mechanism is subjected to an impact acting force exceeding the preset damping, so that the first component and the second component can relatively move to disconnect transmission, namely, the support in an unfolded state can retract due to the impact acting force, the impact acting force is interrupted between the first component and the second component of the transmission assembly due to the relative movement of the first component and the second component, the impact acting force can not be transmitted to the driving mechanism, the driving mechanism can be prevented from being damaged due to the impact acting force, and meanwhile, the support can retract from an unfolded state to a retracted state due to the support due to the relative movement of the first component and the second component, the support can be prevented from being damaged, the use reliability of the support mechanism is improved, and the service life of the energy absorption mechanism is prolonged.
Furthermore, the first part and the second part are in relative rotation or linear sliding connection, the first part and the second part are pressed through a pressure member to generate frictional resistance forming preset damping, or an elastic limiting member is arranged between the first part and the second part to form preset damping. The impact acting force is released in a relative rotation or linear sliding mode, the impact acting force is prevented from being transmitted to the driving mechanism, the protection effect is effectively achieved, the structure is simplified, and the implementation is convenient.
Furthermore, the pressure component and the elastic limiting component are adjustable components to adjust the preset damping between the first component and the second component, so that the preset damping can be adjusted conveniently, various different requirements can be met, and the protection flexibility can be improved.
Further, the pressure member includes a pressing member, the pressing member is connected with one of the first component and the second component to press the first component and the second component, the connection mode can be screw joint, clamping, magnetic adsorption and the like, so that the first component and the second component are directly or indirectly contacted, pressure is generated through pressing to further generate frictional resistance for hindering relative movement, the frictional resistance is used as preset damping, and if the first component and the second component are to be relatively displaced, acting force is required to be larger than the frictional resistance.
Further, part one is the pivot, part two is the rotatable cover and establishes the epaxial rotation piece of pivot, the piece of executing pressure is the nut, the nut spiro union is in order to with pivot and rotation piece along the axial pressfitting of pivot in the pivot, moreover, the steam generator is simple in structure, and the implementation, the equipment is convenient, thereby the nut spiro union can produce along the axial removal of pivot in the pivot, thereby make pivot and rotation piece along the axial pressfitting of pivot, it can also adjust the degree with pivot and rotation piece pressfitting to revolve the nut of revolving, just also adjust the packing force between pivot and the rotation piece, thereby adjust and take place relative pivoted frictional resistance between pivot and the rotation piece, realize adjusting and predetermine the damping, adjust in a flexible way, and is convenient, can satisfy various different demands.
Further, the pressure member further comprises a pressure elastic member, and the pressure elastic member is arranged at least at one position among a position between the pressing member and the first component, a position between the pressing member and the second component, and a position between the first component and the second component. The pressure elastic piece is used for applying elastic acting force, namely, the first component and the second component are elastically pressed, the pressing force between the first component and the second component can be conveniently and flexibly adjusted, namely, the preset damping between the first component and the second component can be flexibly adjusted, and when the impact acting force is larger than the preset damping, the pressure elastic piece is provided with an elastic avoiding space, so that the first component and the second component can move relatively to disconnect transmission.
Furthermore, the elastic limiting component comprises a limiting convex part, a limiting groove and a limiting elastic part, the limiting elastic part and the limiting convex part are arranged on one of the first component and the second component, the limiting groove is arranged on the other of the first component and the second component, the limiting elastic part is used for driving the limiting convex part to be inserted into the limiting groove, the first component and the second component are in limiting connection through the elastic limiting component, the elastic limiting component generates limiting resistance, the first component and the second component can be reliably transmitted when being connected into a whole, meanwhile, when the impact acting force is larger than the limiting resistance of the elastic limiting component, the elastic limiting component can retract, the limiting state between the first component and the second component is released, the first component and the second component can move relatively, so that the impact acting force is prevented from being transmitted, namely, the bracket can be switched to collapse when receiving the impact acting force, the bracket is prevented from being damaged, and meanwhile, the impact acting force is prevented from being absorbed due to the relative movement between the first component and the second component, so that the driving mechanism can be further, the service life of the bracket is effectively protected, and the service life of the bracket is prolonged.
Furthermore, the first component is connected with the driving mechanism through the driving part and is connected with the driving part in a clamping mode, assembly and disassembly are convenient, maintenance and replacement are convenient, the first component can be conveniently connected with the driving mechanism of different models through the driving parts of different models, and flexibility and applicability are good.
Furthermore, when part one and part two are rotated relatively and are connected, be provided with on one of them of part one and driving piece along the spacing transmission portion that rotates radial extension, another be provided with spacing transmission portion complex transmission groove, need not to use mounting such as bolt, install and remove convenience, efficient to can ensure driving piece and rotate reliable transmissibility between the piece, the rotation of driving piece can be reliable drives and rotates the piece and rotate.
Further, spacing transmission portion is provided with a plurality of along rotating circumference interval for rotate piece and driving piece can the even cooperation on whole rotation week, improve the homogeneity of transmission effort, improve the transmission reliability, can avoid the driving piece and rotate the condition that only in the regional contact of the little part that rotates week and lead to the conduction unstable, even inefficacy.
Furthermore, the transmission assembly further comprises a hinge mechanism, the component is connected with the support through the hinge mechanism to drive the support to rotate, the support is unfolded and retracted in a rotating mode, and the transmission assembly is simple in structure and convenient to implement.
The utility model provides a projector, adopts foretell gimbal mechanism, actuating mechanism sets up on projector's organism, and actuating mechanism drives the support and expandes or withdraw, and reliable support projector's organism when the support is in the expansion state, when the support is in the state of withdrawing, reduces occupation space, portable, accomodate.
Compared with the prior art, the invention has the advantages that:
the bracket mechanism can be automatically opened and closed, has good impact protection performance, can be collapsed and energy-absorbed to be recovered to avoid damage when falling and error pressure are encountered, can prevent impact force from being transmitted to the driving mechanism, can prevent the driving mechanism from being damaged due to impact acting force, improves the use reliability of the bracket mechanism, and prolongs the service life.
Drawings
FIG. 1 is a schematic view of a closed state structure of a stand mechanism;
FIG. 2 is a structural view of the bracket mechanism in an unfolded state;
FIG. 3 is a schematic view of the structure of the support mechanism;
FIG. 4 is an exploded view of the transmission assembly;
FIG. 5 is a schematic structural view of a second embodiment of a support mechanism;
FIG. 6 is an end schematic view of an annular member;
FIG. 7 is a schematic structural view of a third embodiment of a support mechanism;
FIG. 8 is a schematic structural view of a fourth embodiment of a support mechanism;
fig. 9 is a schematic structural view of the elastic stopper member.
In the figure: a drive mechanism 1; a transmission assembly 2; a rotating shaft 21; a rotating member 22; a limit transmission part 221; the clasping portion 222; a nut 23; a gasket 24; a hinge mechanism 25; a drive member 26; a transmission groove 261; an annular member 27; pressing the step 271; a shaft 28; a slider 29; the engaging claws 291; a shaft member 210; a kit 211; a bracket 3; an elastic stopper member 4; a limit convex member 41; a limit groove 42; a limit elastic member 43; an adjustment member 44.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The bracket mechanism disclosed by the embodiment of the invention can collapse and avoid when meeting the conditions of falling, error pressure and the like, avoids the transmission of impact force from the bracket to the driving mechanism along the transmission mechanism, avoids the damage of the driving mechanism, the transmission mechanism and the bracket, effectively plays a role in protection, improves the product quality, prolongs the service life and reduces the maintenance cost.
Example one
As shown in fig. 1 to 4, a support mechanism includes a driving mechanism 1, a transmission assembly 2 and a support 3, the driving mechanism 1 drives the support 3 to expand or retract through the transmission assembly 2, the transmission assembly 2 includes a first component and a second component, the driving mechanism 1 is connected with the first component, the support 3 is connected with the second component, a preset damping is provided between the first component and the second component, the first component and the second component are relatively fixed for transmission when an external acting force is smaller than or equal to the preset damping, and the first component and the second component relatively move to disconnect transmission when the external acting force is larger than the preset damping. When the acting force between the first component and the second component is smaller than the preset damping, the first component and the second component are relatively fixed, so that the first component and the second component can reliably rotate, namely, the driving mechanism can reliably drive the support to unfold and retract through the transmission assembly, and the automatic opening and closing function is realized, and when the acting force between the first component and the second component is larger than the preset damping, for example, the conditions of falling and error pressure are met, the first component and the second component can relatively move to break transmission, the support 3 can collapse and retract due to impact, the damage of the support 3 can be avoided, the impact acting force is interrupted between the first component and the second component and cannot be conducted to the driving mechanism 1, so that the driving mechanism 1 is effectively protected, the use reliability of the support mechanism is improved, and the service life is prolonged.
The first part and the second part are in relative rotating connection, and the first part and the second part are pressed through the pressure component to generate frictional resistance forming preset damping. Specifically, the pressure member comprises a pressure applying piece and a pressure elastic piece, the pressure applying piece is connected with one of the first component and the second component to press the first component and the second component, the pressure elastic piece is arranged at least at one of the positions between the pressure applying piece and the first component, between the pressure applying piece and the second component and between the first component and the second component, the first component and the second component are elastically pressed by the pressure elastic piece, the pressing force between the first component and the second component is conveniently and flexibly adjusted, and therefore the friction resistance required to be overcome by the relative rotation of the first component and the second component, namely the preset damping size of the first component and the second component, is adjusted.
In this embodiment, the first component is specifically a rotating shaft 21, the second component is a rotating member 22 which is sleeved on the rotating shaft 21 and can rotate, the pressing member is a nut 23, the pressure elastic member is a washer 24 which is sleeved on the rotating shaft 21, the nut 23 is adjustably screwed on the rotating shaft 21 to press the rotating shaft 21 and the rotating member 22 along the axial direction of the rotating shaft 21, specifically, one washer 24 is arranged between the rotating shaft 21 and the rotating member 22, the washer 24 is also arranged between the nut 23 and the rotating member 22, that is, a step portion with a variable outer diameter is arranged on the rotating shaft 21, the washer 24 and the rotating member 22 are pressed on the step portion by the nut 23, the rotating shaft 21, the washer 24, the rotating member 22, the washer 24 and the nut 23 are sequentially arranged along the axial direction of the rotating shaft 21, and the pressing force in the axial direction can be adjusted by screwing the nut 23, that is, the damping force can be adjusted to meet different requirements.
Further, the transmission assembly 2 further includes a hinge mechanism 25 and a driving member 26, the rotation shaft 21 is connected to the support 3 through the hinge mechanism 25 to drive the support 3 to rotate, the hinge mechanism 25 specifically includes a cam and a connecting rod, the cam is fixedly connected to the rotation shaft 21 to rotate synchronously with the rotation shaft 21, one end of the connecting rod is hinged to the cam, the other end of the connecting rod is hinged to the support 3, the support 3 is hinged to the body a, the driving mechanism 1 is mounted on the body a, a bearing seat is further disposed on the body a, the rotation shaft 21 is rotatably disposed on the bearing seat, the driving mechanism 1 drives the rotation shaft 21 to rotate, the rotation shaft 21 drives the support 3 to rotate along the hinge between the support and the body a through the hinge mechanism 25 to be unfolded or closed, specifically, the rotation shaft 21 is driven by the driving mechanism 1 to rotate, the cam rotates along with the rotation shaft 21, the hinge between the connecting rod and the cam makes a circular motion along with the cam, the connecting rod also rotates around the hinge between the connecting rod and the cam, then the connecting rod drives the support 3 to rotate around the hinge between the support 3 and the body a to be unfolded, so that the support 3 occupies a compact space, and occupies a small space.
In this embodiment, the driving mechanism 1 is a motor assembly, the rotating part 22 is connected and driven with the motor assembly through a driving part 26, the driving part 26 is fixedly connected with an output shaft of the motor assembly, and the rotating part 22 is connected with the driving part 26 in a clamping manner. The driving part 26 is the tube-shape roughly and the cover is established on rotating the piece 22, it is provided with along rotating the radial spacing transmission portion 221 that extends to rotate the piece 22, be provided with on the driving part 26 with spacing transmission portion 221 complex transmission groove 261, spacing transmission portion 221 is provided with a plurality of along rotating the circumference interval, transmission groove 261 also is provided with a plurality of along rotating the circumference interval with spacing transmission portion 221 complex one by one, adopt this kind of structure, install and remove the convenience, efficiency, driving part 26 along the axial cover of pivot 21 can on rotating the piece 22, transmission groove 261 can ensure the stability of rotation conduction with spacing transmission portion 221 block, ensure that motor element can drive the reliable rotation of rotation piece 22, under the condition that does not have other external acting forces, rotate piece 22 and pivot 21 can keep structure as an organic whole owing to predetermine damped existence, thereby pivot 21 can be along with rotating the synchronous rotation of piece 22, and then pivot 21 drives support 3 through hinge mechanism 25 and rotates in order to expand or close.
Example two
As shown in fig. 5 and fig. 6, the difference from the first embodiment is that the first component is specifically a rotating shaft 21, the second component is a rotating member 22 rotatably sleeved on the rotating shaft 21, the rotating member 22 is provided with a plurality of clasping portions 222 distributed at intervals along the circumferential direction of the rotating shaft 21, the portion of the clasping portion 222 located on the radial outer side of the rotating shaft 21 is an inclined surface inclined to the axial direction of the rotating shaft 21, the pressing member is an annular member 27 sleeved on the periphery of the rotating shaft 21 and screwed with the rotating member 22, the radial inner side of the pressing member is provided with a pressing step 271 for cooperating with the clasping portion 222, the pressing step 271 is moved along the axial direction of the rotating shaft 21 by screwing the pressing member so as to make the pressing step 271 contact with the clasping portion 222, and then the pressing step 271 generates a pressing force on the clasping portion 222 towards the radial inner side, finally, the clasping portion 222 prelocalizes the entire circumferential periphery of the rotating shaft 21, that the rotating shaft 21 and the rotating member 22 are pressed together in the radial direction, so that the friction resistance along the circumferential direction needs to be overcome if the rotating shaft 21 and the rotating member 22 are connected by adjusting the damping force between the pressing member 22.
When external effort is less than the damping of predetermineeing between pivot 21 and the rotation piece 22, pivot 21 and rotation piece 22 are an overall structure, can not take place relative rotation between pivot 21 and the rotation piece 22 to the transmission of can be reliable, when external effort is greater than the damping of predetermineeing between pivot 21 and the rotation piece 22, can take place relative rotation between pivot 21 and the rotation piece 22, thereby the disconnection transmission effectively avoids the impact effort to conduct, effectively protects gimbal mechanism.
EXAMPLE III
As shown in fig. 7, the difference from the first embodiment is that the first component is specifically a shaft 28, the second component is a slider 29 which is sleeved on the shaft 28 and can move along the axial direction of the shaft 28, the slider 29 is provided with a plurality of engaging claws 291 which are distributed at intervals along the circumferential direction of the shaft 28, the portion of the engaging claw 291 which is located on the radial outer side of the shaft 28 is a slope inclined to the axial direction of the shaft 28, the pressing member is a ring 27 which is sleeved on the outer periphery of the shaft 28 and is screwed with the slider 29, the radial inner side of the pressing member is provided with a pressing step 271 for matching with the engaging claw 291, the pressing step 271 is moved along the axial direction of the shaft 28 by screwing the pressing member so that the pressing step 271 contacts with the engaging claw 291, the pressing step 271 generates a pressing force to the engaging claw 291 to the radially inward side, and finally the engaging claw 291 pre-holds the entire circumferential outer periphery of the shaft 28, that the shaft 28 and the shaft 29 are pressed tightly by screwing the pressing member, and the pressing force needs to overcome the axial relative sliding of the shaft 28 and the slider 29 is adjusted by adjusting the damping resistance of the pressing member. The driving mechanism 1 is a linear reciprocating mechanism, and may be a cylinder, an electric push rod, or the like, or a motor changes a rotational motion into a linear motion by matching gears and racks, the linear motion direction of the driving mechanism 1 is along the axial direction of the shaft 28, the driving mechanism 1 is connected with the slider 29, and the driving mechanism 1 drives the slider 29 to move in the axial direction of the shaft 28.
When the external acting force is smaller than the preset damping between the shaft 28 and the slider 29, the shaft 28 and the slider 29 are of an integral structure, relative movement cannot occur between the shaft 28 and the slider 29, so that reliable transmission can be achieved, the shaft 28 and the slider 29 integrally move along the axial direction of the shaft 28 under the driving of the driving mechanism 1, and finally the bracket 3 is driven to be unfolded and retracted, the bracket can be hinged on the machine body, and then the shaft 28 is connected with the bracket through a hinge mechanism, so that the linear motion of the shaft 28 drives the bracket to rotate to be unfolded or retracted, or the bracket is directly connected with the shaft 28, so that the bracket linearly moves along with the shaft 28, namely the bracket is unfolded or retracted along the linear motion, and the structure is simpler and more compact; when the external acting force is greater than the preset damping between the shaft rod 28 and the slider 29, the shaft rod 28 and the slider 29 can move relatively along the axial direction of the shaft rod 28, so that transmission is disconnected, the impact acting force is effectively prevented from being conducted, the support can be collapsed and recovered along the axial direction of the shaft rod 28, meanwhile, the driving mechanism 1 cannot be influenced by the impact acting force, and the whole support mechanism is effectively protected.
Example four
As shown in fig. 8 and 9, the difference from the first embodiment is that the first part and the second part are connected in a relative rotation manner, and an elastic limiting component 4 is arranged between the first part and the second part to form a preset damping. Specifically, the first component is a shaft 210, the second component is a sleeve 211 which is rotatably sleeved on the periphery of the shaft 210, the elastic limiting member 4 includes a limiting convex part 41, a limiting groove 42 and a limiting elastic part 43, the limiting elastic part 43 and the limiting convex part 41 are arranged on the sleeve 211, the limiting groove 42 is arranged on the shaft 210, the limiting groove 42 is arranged on the circumferential outer wall of the shaft 210, only one limiting groove 42 can be arranged, or a plurality of limiting grooves can be arranged along the circumferential direction or the axial direction of the shaft 210, a hole for accommodating the limiting elastic part 43 and the limiting convex part 41 is formed in the sleeve 211, the axial direction of the hole is along the radial direction of the shaft 210, the limiting elastic part 43 can specifically adopt a spring, the limiting elastic part 43 is used for driving the limiting convex part 41 to be inserted into the limiting groove 42, and the limiting convex part 41 is matched with the arc surface or the inclined surface of the limiting groove 42. Or the limiting elastic part and the limiting convex part are arranged on the shaft part, the limiting groove is formed in the inner wall of the sleeve part, a hole along the radial direction is formed in the circumferential outer wall of the shaft part, the limiting elastic part and the limiting convex part are located in the hole, and the limiting convex part protrudes out of the circumferential outer wall of the shaft part and is inserted into the limiting groove in the inner wall of the sleeve part under the action of the limiting elastic part, so that the limiting connection between the shaft part and the sleeve part is realized.
Normally, the position-limiting protruding part 41 is inserted into the position-limiting groove 42, the elastic force of the position-limiting elastic part 43 causes the position-limiting protruding part 41 to keep a certain pressure to be inserted into the position-limiting groove 42, so that if the shaft 210 and the sleeve 211 rotate relatively, the elastic force of the position-limiting elastic part 43 needs to be overcome to enable the position-limiting protruding part 41 to exit from the position-limiting groove 42, the elastic position-limiting member 4 generates position-limiting resistance which hinders the relative rotation of the shaft 210 and the sleeve 211, that is, the shaft 210 and the sleeve 211 are connected according to a preset damping.
When the external acting force is smaller than the preset damping between the shaft 210 and the sleeve 211, the shaft 210 and the sleeve 211 are of an integral structure, the shaft 210 and the sleeve 211 cannot rotate relatively, so that transmission can be performed reliably, the shaft 210 and the sleeve 211 integrally rotate along the circumferential direction of the shaft 210 under the driving of the driving mechanism 1, and finally the bracket 3 is driven to be unfolded and retracted; when the external acting force is greater than the preset damping between the shaft 210 and the sleeve 211, the acting force is transmitted to the limiting convex part 41 and between the limiting grooves 42, namely, the mutual acting force along the rotation circumference exists between the limiting convex part 41 and the limiting grooves 42, the acting force of the limiting grooves 42 to the limiting convex part 41 can drive the limiting convex part 41 to compress the limiting elastic part 43, finally, the situation that the limiting convex part 41 exits from the limiting grooves 42 occurs, the limiting between the shaft 210 and the sleeve 211 is released, so that the relative rotation can occur, the transmission is disconnected, the transmission of the impact acting force is effectively avoided, the bracket still can be crumpled and retracted, meanwhile, the driving mechanism 1 cannot be influenced by the impact acting force, and the whole bracket mechanism is effectively protected.
If the preset damping between the shaft member 210 and the sleeve member 211 needs to be adjusted, the adjusting member 44 may be disposed in a hole of the sleeve member 211, the adjusting member 44 is screwed with the hole, and the compression amount of the spring is adjusted by screwing the adjusting member 44, so as to adjust the elastic acting force of the spring on the limit protruding member 41, further adjust the pressure of the limit protruding member 41 inserted into the limit groove 42, and finally adjust the preset damping that needs to be overcome when the shaft member 210 and the sleeve member 211 rotate relatively.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.
Claims (12)
1. The support mechanism is characterized by comprising a driving mechanism, a transmission assembly and a support, wherein the driving mechanism drives the support to expand or retract through the transmission assembly, the transmission assembly comprises a first component and a second component, the driving mechanism is connected with the first component, the support is connected with the second component, a preset damping is arranged between the first component and the second component, the first component and the second component are relatively fixed to transmit when external acting force is smaller than or equal to the preset damping, and the first component and the second component move relatively to disconnect transmission when the external acting force is larger than the preset damping.
2. The support mechanism of claim 1, wherein the first part and the second part are in relative rotational or linear sliding connection, the first part and the second part are pressed together by a pressure member to generate a frictional resistance to form a predetermined damping, or an elastic limiting member is disposed between the first part and the second part to form the predetermined damping.
3. The mount mechanism according to claim 2, wherein the pressure member and resilient stop member are adjustable members to adjust the predetermined damping between the first component and the second component.
4. The mount mechanism according to claim 2 wherein the pressure member includes a pressure member connected to one of the first and second parts to press the first and second parts together.
5. The support mechanism of claim 4, wherein the first member is a rotating shaft, the second member is a rotating member rotatably sleeved on the rotating shaft, the pressing member is a nut, and the nut is threadedly engaged with the rotating shaft to press the rotating shaft and the rotating member together along an axial direction of the rotating shaft.
6. The support mechanism of claim 4 or 5, wherein the pressure member further comprises a pressure spring member provided at least at one of a position between the pressing member and the first member, a position between the pressing member and the second member, and a position between the first member and the second member.
7. The support mechanism of claim 2, wherein the elastic limiting member comprises a limiting convex part, a limiting groove and a limiting elastic part, the limiting elastic part and the limiting convex part are arranged on one of the first component and the second component, the limiting groove is arranged on the other of the first component and the second component, and the limiting elastic part is used for driving the limiting convex part to be inserted into the limiting groove.
8. The support mechanism of claim 1, wherein the first member is connected to the drive mechanism via a drive member, and the first member is connected to the drive member in a snap-fit manner.
9. The support mechanism of claim 8, wherein when the first member is rotatably connected to the second member, one of the first member and the driving member is provided with a limit transmission portion extending in a radial direction of rotation, and the other is provided with a transmission groove engaged with the limit transmission portion.
10. The support mechanism of claim 9, wherein the limit transmission part is provided in a plurality of numbers at intervals along the circumferential direction of rotation.
11. The support mechanism of claim 1, wherein the drive assembly further comprises a hinge mechanism, and the member is coupled to the support via the hinge mechanism to impart rotational movement to the support.
12. A projector comprising the carriage mechanism of any one of claims 1 to 11, wherein the driving mechanism is provided on a body of the projector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110394037.7A CN115199872A (en) | 2021-04-13 | 2021-04-13 | Support mechanism and projector adopting same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110394037.7A CN115199872A (en) | 2021-04-13 | 2021-04-13 | Support mechanism and projector adopting same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115199872A true CN115199872A (en) | 2022-10-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110394037.7A Pending CN115199872A (en) | 2021-04-13 | 2021-04-13 | Support mechanism and projector adopting same |
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| Country | Link |
|---|---|
| CN (1) | CN115199872A (en) |
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