WO2021043109A1

WO2021043109A1 - Horizontal sliding door movement mechanism and projection device

Info

Publication number: WO2021043109A1
Application number: PCT/CN2020/112639
Authority: WO
Inventors: 黄旻; 盘汉志; 张贤鹏
Original assignee: 深圳光峰科技股份有限公司
Priority date: 2019-09-03
Filing date: 2020-08-31
Publication date: 2021-03-11
Also published as: CN112445047A

Abstract

Provided is a horizontal sliding door movement mechanism (100), comprising a slide track (1), a sliding door assembly (2) and a driving module assembly (3); the driving module assembly (3) comprises a transmission worm gear and gear assembly (34) and synchronous gears (35); the transmission worm gear and gear assembly (34) drive two synchronous gears (35) to rotate at the same time so that the sliding door assembly (2) can horizontally slide in an axial direction of the slide track; the transmission worm gear and gear assembly (34) comprises a worm gear (331), a transmission gear (332) connected with the worm gear (331) in a meshed mode by means of a microstructure, and an elastic piece (336); when the transmission gear (332) is static due to external force and torsion generated by rotation of the worm gear (331) is increased to be greater than the elastic force formed by abutting of the elastic piece (336) against the transmission gear (332), the elastic piece (336) generates compressive deformation and enables the transmission gear (332) to slide out through the tooth positions to cause idling of the worm gear (331). Provided is also a projection device.

Description

Horizontal sliding door movement mechanism and projection equipment

【Technical Field】

The invention relates to the field of projection technology, in particular to a horizontal sliding door movement mechanism and projection equipment.

【Background technique】

With the popularization and development of projection equipment, the sliding door movement mechanism used in the lens door of the projection equipment has been increasingly used.

At present, the related art sliding door movement mechanism includes a sliding door, a slideway, and a transmission system. The transmission system includes a driving motor, a plurality of gears and a timing belt. The driving motor drives a plurality of the gears and the timing belt to make the The sliding door moves on the chute to realize the shielding and revealing of the lens.

However, the sliding door of the sliding door movement mechanism of the related art stops under the action of external force, and the driving motor continues to rotate, which easily causes the meshing gears of the multiple gears to jump and wear, and damage the precision gears. In addition, the use of the timing belt is prone to wear, lengthen, and tooth skipping during use, resulting in inconsistent left and right sliding speeds, so that the sliding door is prone to skew and jam; and the timing belt It needs to be replaced regularly, and the maintenance cost is high.

Therefore, it is necessary to provide a new horizontal sliding door movement mechanism and projection equipment to solve the above technical problems.

[Summary of the invention]

The purpose of the present invention is to overcome the above technical problems and provide a horizontal sliding door movement mechanism and a projection device with good stability and high reliability in the transmission structure of the sliding door.

In order to achieve the above-mentioned object, the present invention provides a horizontal sliding door movement mechanism, which includes two slideways arranged at intervals and parallel to each other, and a sliding door installed on the two slideways to slide horizontally along the axial direction of the slideways. Assembly and a drive module assembly which is installed on the two slideways and generates driving force to drive the sliding door assembly to slide horizontally along the slideway. The drive module assembly includes a transmission worm gear and a gear assembly and is driven by the The transmission worm gear and gear assembly drives and connects to the two synchronous gears of the sliding door assembly, and the transmission worm gear and gear assembly drives the two synchronous gears to rotate at the same time so that the sliding door assembly is along the axis of the slideway Sliding horizontally; the transmission worm gear and gear assembly includes a worm gear, a transmission gear connected with the worm gear through a microstructure to drive the synchronization gear to rotate, and an elastic piece connected to the transmission gear at one end, when the transmission When the gear is stationary by an external force, the torsion force generated by the rotation of the worm wheel is increased to be greater than the elastic force formed by the elastic member abutting the transmission gear, the elastic member produces compression deformation and causes the transmission gear to slide through the tooth position. Out to form a worm gear idling.

More preferably, the worm wheel has a circular shape, the abutment surface of the worm wheel and the transmission gear is provided with a plurality of oblique grooves that are recessed in the circumferential direction along the center, and the transmission gear is provided with matching with the oblique groove When the worm gear is idling, the transmission gear does not follow the rotation of the worm wheel after the chute slips out of the chute in the direction in which the transmission gear rotates.

More preferably, the drive module assembly further includes a beam that is respectively installed and fixed to the two slides, a drive motor that is fixed to the beam, and a drive worm that is installed on the drive motor and connected to the worm gear And a synchronization shaft respectively connected to the two synchronization gears to make the two synchronization gears rotate synchronously, the drive motor rotates and drives the two shafts through the drive worm, the transmission worm gear and gear assembly, and the synchronization shaft in turn. The synchronous gear rotates simultaneously to make the sliding door assembly slide horizontally along the axial direction of the slideway.

More preferably, the transmission worm gear and gear assembly further includes a first bracket for fixing the drive motor to the crossbeam, a second bracket that is spaced apart from the first bracket and fixed to the crossbeam, and is mounted on the crossbeam. The fixed shaft of the second bracket, the elastic member is sleeved on the fixed shaft and its end far away from the transmission gear is fixed to the second bracket, the worm gear, the transmission gear and the elastic member are all It is arranged between the first bracket and the second bracket and is arranged in sequence through the fixed shaft.

More preferably, the sliding door assembly includes a sliding door, a synchronous rack that is respectively fixed at both ends of the sliding door and parallel to the axial direction of the slideway, and is fixed at both ends of the sliding door to support the The sliding door has two sliding components that move horizontally along the axial direction of the slide, each of the synchronous racks is spaced apart from an adjacent one of the sliding components and is located between the two sliding components, each The synchronizing gear is matched with a corresponding one of the synchronizing racks.

More preferably, the sliding door assembly further includes an elastic piece fixed to the sliding door and abutting against the synchronization rack, the elastic piece abuts against an end of the synchronization rack away from the crossbeam, and the synchronization The rack moves horizontally along the axial direction of the slideway and generates elastic displacement through the elastic piece.

More preferably, the sliding assembly further includes a roller bracket fixed to the sliding door, a front and back moving roller mounted on the roller bracket along the axial direction of the slideway, and an axial direction perpendicular to the slideway. The left and right limit rollers mounted on the roller bracket in the direction, the forward and backward movement rollers abut on the slideway to support the sliding door and realize the movement of the sliding door and the slideway as rolling; the left and right The limit roller abuts against the slideway to ensure that the sliding door moves horizontally along the axial direction of the slideway.

More preferably, the sliding door assembly further includes reinforcing ribs fixed to the sliding door, and the reinforcing ribs are respectively spaced apart from the synchronous rack and the sliding assembly.

More preferably, the sliding door assembly further includes a plurality of limit blocks fixed to the sliding door, and the limit blocks abut against the synchronous rack so that the synchronous rack moves along the sliding The axial direction of the track moves horizontally.

The present invention also provides a projection device, including a lens and a horizontal sliding door movement mechanism as described in any one of the above arranged spaced apart from the lens, and the sliding door moves horizontally along the axial direction of the slide to realize shielding Or reveal the lens.

Compared with the prior art, the horizontal sliding door movement mechanism and the projection device of the present invention are provided with the worm gear and the transmission gear of the transmission worm gear and gear assembly. When the sliding door assembly stops due to external force, That is, when the transmission gear is stationary by an external force, the torsion force generated by the rotation of the worm wheel is increased to be greater than the elastic force formed by the elastic member abutting the transmission gear, the elastic member generates compression deformation and causes the transmission gear The idling of the worm gear is formed by the sliding of the tooth position, which effectively protects the various components of the drive module assembly, avoids tooth skipping, abrasion of the meshing gear, and damage to the precision gear, so that the horizontal sliding door movement mechanism has high reliability. In addition, by arranging the two synchronization gears and the synchronization shaft that causes the two synchronization gears to rotate synchronously, the rotation of the drive motor drives the synchronization rack through the synchronization gear, so that the sliding door is The slideway moves in a balanced manner, thereby avoiding the use of timing belts in related technologies for transmission, and avoiding inconsistent left and right sliding speeds caused by tooth skipping during long-term use of the timing belt, causing the sliding door assembly to easily deviate and jam, thereby causing it to move The stability is good. More preferably, the sliding assembly realizes the horizontal movement of the sliding door along the axial direction of the slideway through the forward and backward movement rollers and the left and right limit rollers, thereby reducing frictional resistance, improving energy efficiency, and reducing costs. The roller can effectively prevent the sliding door assembly from being skewed and stuck during the displacement process, so that the horizontal sliding door movement mechanism has good stability. The horizontal sliding door movement mechanism is also provided by arranging the elastic piece to abut against the synchronous rack, and the synchronous rack moves horizontally along the axial direction of the slideway through the elastic displacement of the elastic piece, thereby causing the horizontal The sliding door movement mechanism has better stability. The horizontal sliding door movement mechanism is also provided with the reinforcing ribs fixed to the sliding door to prevent the sliding door from bending and deforming and scraping the upper cover of the whole machine during displacement, thereby making the horizontal sliding door movement mechanism Higher reliability.

【Explanation of the drawings】

In order to explain the technical solutions in the embodiments of the present invention more clearly, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings, among which:

Figure 1 is a schematic diagram of a three-dimensional structure of a horizontal sliding door movement mechanism of the present invention;

Figure 2 is a schematic structural view from another angle of the horizontal sliding door movement mechanism of the present invention;

Figure 3 is a schematic structural view of a sliding door assembly of a horizontal sliding door movement mechanism according to the present invention;

Figure 4 is a schematic view of the three-dimensional structure of a sliding assembly of a horizontal sliding door movement mechanism according to the present invention;

Figure 5 is a schematic diagram of the assembly of a sliding door and reinforcing ribs of a horizontal sliding door movement mechanism according to the present invention;

6 is a schematic structural view of a drive module assembly of a horizontal sliding door movement mechanism of the present invention;

7 is a schematic structural view of another angle of the drive module assembly of the horizontal sliding door movement mechanism of the present invention;

8 is a partial three-dimensional structure diagram of a drive module assembly of a horizontal sliding door movement mechanism of the present invention;

Fig. 9 is an exploded schematic view of a part of the three-dimensional structure in Fig. 8;

10 is a schematic diagram of the coordinated rotation of a worm gear and a transmission gear of a horizontal sliding door movement mechanism of the present invention;

Figure 11 is a schematic diagram of the idling worm wheel of a horizontal sliding door movement mechanism of the present invention.

【detailed description】

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Please refer to FIGS. 1-9 at the same time. The present invention provides a horizontal sliding door movement mechanism 100, which includes two slideways 1 arranged at intervals and parallel to each other. 1. The sliding door assembly 2 that slides horizontally in the axial direction of 1 and the drive module assembly 3 that is installed on the two slideways 1 and generates driving force to drive the sliding door assembly 2 to slide horizontally along the slideway 1. The horizontal sliding door movement mechanism 100 is used to cover or expose the lens of the projection device.

In this embodiment, the sliding door assembly 2 includes a sliding door 21, two synchronous racks 22, two sliding assemblies 23, elastic pieces 24, reinforcing ribs 25 and limit blocks 26.

The sliding door 21 is used to cover or expose the lens. In this embodiment, the sliding door 21 is rectangular, the two short sides of the sliding door 21 are arranged in parallel with the slideway 1, and the two long sides of the sliding door 21 are arranged perpendicular to the slideway 1. .

The synchronous rack 22 is parallel to the axial direction of the slide 1. The synchronous rack 22 is fixed to the two ends of the sliding door 21 respectively. Wherein, each of the synchronization racks 22 is spaced apart from an adjacent sliding component 23 and is located between the two sliding components 23. The use of the synchronous rack 22 can enable the sliding door to move in a balanced manner on the slide, thereby avoiding the use of timing belts in related technologies for transmission, and avoiding inconsistent left and right sliding speeds caused by tooth skipping during long-term use of the timing belt. As a result, the sliding assembly 23 is prone to deflection and jamming, so that the horizontal sliding door movement mechanism 100 has good stability.

The sliding assembly 23 is used to cooperate with the sliding track 1 to support the sliding door 21 to move. In this embodiment, the two sliding assemblies 23 are respectively fixed at two ends of the sliding door 21 to support the sliding door 21 to move horizontally along the axial direction of the slide 1. Specifically, the sliding assembly 23 includes a roller bracket 231, a front and rear moving roller 232, and a left and right limit roller 233.

The roller bracket 231 is fixed to the sliding door 21.

The forward and backward moving rollers 232 are mounted on the forward and backward moving rollers 232 of the roller bracket 231 along the axial direction of the slideway 1. The forward and backward movement roller 232 abuts on the slideway 1 to support the sliding door 21 and realize the movement of the sliding door 21 and the slideway 1 as rolling. The forward and backward moving rollers 232 mainly support the weight of the sliding door 21, and the forward and backward moving rollers 232 roll to reduce friction and improve energy efficiency.

The left and right limit rollers 233 are installed on the left and right limit rollers 233 of the roller bracket 231 along the axial direction perpendicular to the slideway 1. The left and right limit rollers 233 abut the slideway 1 to ensure that the sliding door 21 moves horizontally along the axial direction of the slideway 1. The left and right limit rollers 233 are used to prevent the sliding door 21 (especially when the sliding door 21 has a large distance span between the slideways 1) from skewing and jamming during displacement.

The sliding assembly 23 realizes the horizontal sliding of the sliding door 21 along the axial direction of the slide 1 through the front and rear moving rollers 232 and the left and right limit rollers 233. The sliding friction between the sliding door 21 and the slideway 1 is improved from the existing sliding friction to rolling friction, which reduces frictional resistance, improves energy efficiency, and reduces costs, thereby effectively preventing the sliding door assembly 23 from skewing during displacement. , Stuck, so that the horizontal sliding door movement mechanism 100 has good stability.

The elastic piece 24 is fixed to the sliding door 21 and abuts against the synchronous rack 22. The elastic sheet 24 is used to relieve stress and overcome processing errors. Specifically, the synchronous rack 22 moves horizontally along the axial direction of the slide 1 through the elastic piece 24 to generate elastic displacement. That is to say, the elastic piece 24 allows the synchronous rack 22 to produce elastic displacement in the forward and backward sliding direction, that is, the synchronous rack 22 can only be displaced under the condition that the thrust force is greater than the elastic force of the elastic piece 24, that is, produce The effect of the pressure generated by the forward and backward sliding of the synchronous rack 22 is compensated. Therefore, when the sliding door assembly 2 is closed, the driving motor of the drive module assembly 3 can be prevented from hitting the housing fixing plate of the projection device due to the multi-turn angle of the drive motor of the drive module assembly 3, thereby avoiding the impact of abnormal noise, thereby improving The stability of the horizontal sliding door movement mechanism 100.

In this embodiment, the elastic piece 24 abuts on an end of the synchronization rack 22 away from the cross beam 31. Setting the elastic piece 24 in this position is beneficial to improve the stability of the horizontal sliding door movement mechanism 100.

The reinforcing rib 25 is fixed to the sliding door 21. The reinforcing ribs 25 are spaced apart from the synchronous rack 22 and the sliding assembly 23 respectively. Because the distance between the sliding door 21 and the slide 1 is relatively large, it is limited to the material, structural size (especially thickness) and other factors of the sliding door 21, which may easily cause the sliding door 21 to bend. When deformed, the sliding door assembly 2 hits the housing fixing plate of the projection device, so as to avoid the impact of abnormal noise and affect user experience. The reinforcing rib 25 reinforces the strength of the sliding door 21 that spans the sliding door 21, prevents the sliding door 21 from bending and deforming, and ensures the flatness of the sliding door 21, thereby ensuring smooth displacement of the sliding door assembly 2.

The reinforcing rib 25 is rectangular, and the reinforcing rib 25 is arranged on the same central axis as the sliding door 21 and is arranged between the two synchronous racks 22. This structure is beneficial to improve the stability of the horizontal sliding door movement mechanism 100. In this embodiment, the reinforcing rib 25 and the sliding door 21 form a fixed structure by riveting or spot welding. Of course, it is not limited to this, and other forms of fixing methods such as snaps, sticking, etc. are all possible. More preferably, the reinforcing rib 25 and the sliding door 21 can also be formed integrally.

The limiting block 26 is fixed to the sliding door 21. The limiting block 26 includes a plurality of. In this embodiment, the limiting blocks 26 include four, and each of the synchronization racks 22 is provided with two spaced limiting blocks 26. The limiting block 26 abuts against the synchronous rack 22 so that the synchronous rack 22 moves horizontally along the axial direction of the slide 1. The limit block 26 limits the other degrees of freedom of the synchronization rack 22 except along the axial direction of the slide 1, thereby improving the stability of the horizontal sliding door movement mechanism 100.

The drive module assembly 3 includes a beam 31 fixed to the two slide rails 1, a drive motor 32 fixed to the beam 31, a drive worm 33 mounted on the drive motor 32, and a drive worm 33 connected to the drive motor 32. The transmission worm gear 331 and gear assembly 34 of the drive worm 33, the two synchronization gears 35 driven by the transmission worm gear 331 and the gear assembly 34 and connected with the sliding door assembly 2, and the two synchronization gears 35 are respectively connected to A synchronization shaft 36 that causes the two synchronization gears 35 to rotate synchronously.

In this embodiment, each of the synchronization gears 35 is toothed and matched with a corresponding one of the synchronization racks 22. The driving motor 32 rotates and sequentially drives the two synchronization gears 35 to rotate simultaneously through the driving worm 33, the transmission worm gear 331, the gear assembly 34, and the synchronization shaft 36 to make the sliding door assembly 2 move along the sliding door assembly. The shaft 1 slides horizontally, that is, the two rotating synchronization gears 35 respectively drive the two synchronization racks 22 to realize the horizontal sliding of the sliding door 21 along the axial direction of the slide 1. Therefore, the sliding door 21 moves in a balanced manner on the slideway 1, and the structure of the drive module assembly 3 prevents the related technology from using a timing belt for transmission, and avoids the left and right sliding speed caused by the skipping of the teeth during the long-term use of the timing belt. Inconsistent, the sliding door assembly 2 is prone to skew and jamming, and the structure of the drive module assembly 3 does not require maintenance in the later stage, which reduces maintenance costs, so that the horizontal sliding door movement mechanism 100 has good stability.

In this embodiment, the transmission worm gear and gear assembly 34 includes a worm gear 331 connected to the drive worm 33, a transmission gear 332 that is toothed and connected with the worm gear 331 to drive the synchronization gear 35 to rotate, The first bracket 333 used to fix the drive motor 32 to the cross beam 31, the second bracket 334 spaced apart from the first bracket 333 and fixed to the cross beam 31, and the fixing installed on the second bracket 334 The shaft 335 and the elastic member 336 sleeved on the fixed shaft 335. One end of the elastic member 336 is connected to the transmission gear 332, and an end of the elastic member 336 away from the transmission gear 332 is fixed to the second bracket 334. In this embodiment, the elastic member 336 is a spring, and the structure provided with the spring facilitates production and installation. The spring has good elasticity and high reliability. Of course, other elastic parts can be used, which can provide compressive elasticity. The worm gear 331, the transmission gear 332 and the elastic member 336 are all disposed between the first bracket 333 and the second bracket 334 and are arranged in sequence through the fixed shaft 335. The driving motor 32, the driving worm 33, the transmission worm gear 331 and the gear assembly 34, the synchronization gear 35, and the synchronization shaft 36 are all fixed to the cross beam 31 through respective brackets.

The transmission worm gear and gear assembly 34 is a protective structure. Specifically, the worm wheel 331 is circular. Of course, it is also possible for the worm wheel 331 to be elliptical, and even square or diamond-shaped. In this embodiment, the worm gear 331 is provided with a plurality of oblique grooves 3310 that are recessed in the circumferential direction along the center on the contact surface with the transmission gear 332, and the transmission gear 332 is provided with a matching with the oblique groove 3310. The boss 3321. When the boss 3321 rotates with the transmission gear 33, the worm gear 331 rotates by abutting against the chute 3310. Please refer to FIGS. 10-11 at the same time. The protection principle is: when the sliding door assembly 2 stops under the action of external force, that is, when the transmission gear 332 is stationary by the external force, the torque generated by the rotation of the worm gear 331 increases to When greater than the elastic force formed by the elastic member 336 against the transmission gear 332, the elastic member 336 generates compression deformation and causes the transmission gear 332 to slide out through the tooth position to form a worm wheel idling. Specifically, at this time, the rotation of the worm gear 331 generates a torsion, which is decomposed by the inclined surface of the worm gear 331 into a thrust that pushes the transmission gear 332 to move away from the worm gear 331. When the thrust is greater than the elastic member When the elastic force 336 exerts on the transmission gear 332, the transmission gear 332 will slide out through the tooth position to form the worm wheel idling. In other words, after the worm gear is idling, the boss 3321 slides out of the chute 3310 in the direction in which the transmission gear 332 rotates, and the transmission gear 332 does not follow the rotation of the worm gear 331. That is, the transmission gear 332 stops rotating. At this time, the worm gear 331 and the transmission gear 332 will slip out through the tooth position to form the worm gear idling, thereby effectively cutting off the driving force, thereby effectively protecting the various components of the transmission mechanism , Avoiding gear skipping, abrasion, and damaging precision gears, so that the horizontal sliding door movement mechanism 100 is highly reliable.

The present invention also provides a projection device (not shown), including a lens and a horizontal sliding door movement mechanism 100 arranged spaced apart from the lens, and the sliding door 21 moves horizontally along the axial direction of the slide 1 to Achieve masking or revealing of the lens.

Compared with the prior art, the horizontal sliding door movement mechanism and the projection device of the present invention are provided with the worm gear and the transmission gear of the transmission worm gear and gear assembly. When the sliding door assembly stops due to external force, That is, when the transmission gear is stationary by an external force, the torsion force generated by the rotation of the worm wheel is increased to be greater than the elastic force formed by the elastic member abutting the transmission gear, the elastic member generates compression deformation and causes the transmission gear The idling of the worm gear is formed by the sliding of the tooth position, which effectively protects the various components of the drive module assembly, avoids tooth skipping, abrasion of the meshing gear, and damage to the precision gear, so that the horizontal sliding door movement mechanism has high reliability. In addition, by arranging the two synchronization gears and the synchronization shaft that causes the two synchronization gears to rotate synchronously, the rotation of the drive motor drives the synchronization rack through the synchronization gear, so that the sliding door is The slides move in a balanced manner, thereby avoiding the use of timing belts in related technologies for transmission, and avoiding inconsistent left and right sliding speeds caused by tooth skipping during long-term use of timing belts, causing the sliding door components to be prone to deflection and jamming, thereby causing them to move The stability is good. More preferably, the sliding assembly realizes the horizontal movement of the sliding door along the axial direction of the slideway through the forward and backward movement rollers and the left and right limit rollers, thereby reducing frictional resistance, improving energy efficiency, and reducing costs. The roller can effectively prevent the sliding door assembly from being skewed and stuck during the displacement process, so that the horizontal sliding door movement mechanism has good stability. The horizontal sliding door movement mechanism further abuts against the synchronous rack by setting the elastic piece, and the synchronous rack moves horizontally along the axial direction of the slideway through the elastic displacement of the elastic piece, thereby causing the horizontal The sliding door movement mechanism has better stability. The horizontal sliding door movement mechanism further prevents the sliding door from bending and deforming by arranging the reinforcing ribs fixed to the sliding door, and scraping the upper cover of the whole machine during displacement, thereby making the horizontal sliding door movement mechanism Higher reliability.

The above are only the embodiments of the present invention. It should be pointed out here that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present invention, but these all belong to the present invention. The scope of protection.

Claims

A horizontal sliding door movement mechanism, comprising two slideways arranged at intervals and parallel to each other, a sliding door assembly installed on the two slideways to slide horizontally along the axial direction of the slideways, and a sliding door assembly installed on the two slideways. A drive module assembly that generates a driving force to drive the sliding door assembly to slide horizontally along the slideway, characterized in that the drive module assembly includes a transmission worm gear and a gear assembly and is driven by the transmission worm gear and gear The assembly drives and is connected to two synchronous gears of the sliding door assembly, and the transmission worm gear and gear assembly drives the two synchronous gears to rotate at the same time so that the sliding door assembly slides horizontally along the axial direction of the slide; The transmission worm gear and gear assembly includes a worm gear, a transmission gear connected with the worm gear through a microstructure to drive the synchronization gear to rotate, and an elastic member connected to the transmission gear at one end. When the transmission gear is stationary under external force When the torsion force generated by the rotation of the worm wheel is increased to be greater than the elastic force formed by the elastic member abutting the transmission gear, the elastic member generates compression deformation and causes the transmission gear to slide out through the tooth position to form the worm wheel idling .
The horizontal sliding door movement mechanism according to claim 1, wherein the worm wheel has a circular shape, and a contact surface of the worm wheel with the transmission gear is provided with a plurality of oblique grooves recessed in the circumferential direction along the center , The transmission gear is provided with a boss that matches the oblique groove, and the worm gear is idling by the boss in the direction of the transmission gear rotation after the oblique groove slides out, the transmission gear does not follow the worm gear Rotate.
The horizontal sliding door movement mechanism according to claim 1, wherein the drive module assembly further comprises a beam installed and fixed to the two slide rails and a drive motor fixed to the beam, respectively, and The drive motor is connected to the drive worm of the worm gear and the synchronization shafts respectively connected to the two synchronization gears so that the two synchronization gears rotate synchronously. The drive motor rotates and sequentially passes through the drive worm and the transmission The worm gear and gear assembly and the synchronization shaft drive the two synchronization gears to rotate at the same time so that the sliding door assembly slides horizontally along the axial direction of the slideway.
The horizontal sliding door movement mechanism according to claim 3, wherein the transmission worm gear and gear assembly further comprises a first bracket for fixing the drive motor to the cross beam, and is spaced apart from the first bracket and A second bracket fixed to the cross beam, a fixed shaft installed on the second bracket, the elastic member is sleeved on the fixed shaft and its end away from the transmission gear is fixed to the second bracket, so The worm gear, the transmission gear and the elastic member are all arranged between the first bracket and the second bracket and are arranged in sequence through the fixed shaft.
The horizontal sliding door movement mechanism according to claim 1, wherein the sliding door assembly includes a sliding door, a synchronous rack that is fixed to both ends of the sliding door and is parallel to the axial direction of the slideway, and Two sliding components respectively fixed at both ends of the sliding door to support the sliding door to move horizontally along the axial direction of the slideway, each of the synchronous racks is spaced apart from the adjacent one of the sliding components and Located between the two sliding components, each of the synchronization gears is matched with a corresponding one of the synchronization racks.
The horizontal sliding door movement mechanism according to claim 5, wherein the sliding door assembly further comprises an elastic piece fixed to the sliding door and abutting against the synchronization rack, the elastic piece abutting against the One end of the synchronous rack far away from the crossbeam, and the synchronous rack moves horizontally along the axial direction of the slideway to generate elastic displacement through the elastic piece.
The horizontal sliding door movement mechanism according to claim 5, wherein the sliding assembly further comprises a roller bracket fixed to the sliding door, and mounted on the front and rear of the roller bracket along the axial direction of the slideway. The moving roller and the left and right limit rollers installed on the roller bracket along the axial direction perpendicular to the slideway, the front and back moving rollers abut on the slideway to support the sliding door and realize the sliding door The movement with the slideway is rolling; the left and right limit rollers abut on the slideway to ensure that the sliding door moves horizontally along the axial direction of the slideway.
The horizontal sliding door movement mechanism according to claim 5, wherein the sliding door assembly further comprises a reinforcing rib fixed to the sliding door, and the reinforcing rib is respectively connected to the synchronous rack and the sliding assembly Interval settings.
The horizontal sliding door movement mechanism according to claim 5, wherein the sliding door assembly further comprises a plurality of limit blocks fixed to the sliding door, and the limit blocks abut against the synchronous rack In order to make the synchronous rack move horizontally along the axial direction of the slideway.
A projection device, characterized in that it comprises a lens and the horizontal sliding door movement mechanism according to any one of claims 1-9 arranged spaced apart from the lens, and the sliding door is along the axial direction of the slide. Move horizontally to cover or reveal the lens.