Turnover driving mechanism and turnover driving device

Abstract

The utility model relates to the technical field of photocuring equipment, in particular to a turnover driving mechanism and a turnover driving device.The turnover driving mechanism is applied to the photocuring equipment and comprises a first rotating seat and a driving assembly used for driving the first rotating seat to rotate. The first rotating seat comprises a first connecting end used for being fixedly connected with the film stretching assembly, a second connecting end used for being rotationally connected with the trough, and a third connecting end used for being connected with the driving assembly. The second connecting end is located between the first connecting end and the third connecting end; the driving assembly is used for driving the first rotating seat to rotate to a horizontal or preset inclined position relative to the trough in cooperation with the film stretching assembly; according to the overturning driving mechanism, the driving assembly can drive the first rotating base to drive the film stretching assembly to rotate to the horizontal position or the preset inclined position relative to the material groove, interference of bubbles can be effectively avoided, and the printing quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to light curing equipment technical field, especially in a kind of turnover driving mechanism and turnover driving device. BACKGROUND

[0002] Light curing equipment is the device that utilizes photosensitive material to occur photochemical reaction under the irradiation of specific wavelength light source, and is solidified from liquid or semi-liquid state.

[0003] In the existing light curing 3D printing process, bubbles will be generated in the release process, these bubbles will be attached to the lower surface of release film along with the printing liquid attached to the lower surface of release film, in subsequent printing process, these bubbles not only form cavity in printing sample, but also can cause strength and appearance defects of final product, and then affect overall printing quality. In the prior art, scraper is usually used to eliminate the bubbles under release film, but due to the existence of small gap between scraper and liquid surface, especially for bubbles with diameter in micron level, scraper is often difficult to completely remove. This makes that the small bubbles not removed can be fixed in the interior of printing object in the curing process, form cavity, and bring adverse effects on structural integrity of printing sample. SUMMARY

[0004] In order to solve at least one of the above technical problems, the turnover driving mechanism in the utility model can effectively avoid the interference of bubbles and improve the printing quality.

[0005] The utility model provides a kind of turnover driving mechanism, it is applied to light curing equipment, the light curing equipment includes trough and is provided with release film and is stretched film component, the trough is used to hold printing liquid, the turnover driving mechanism includes first rotating seat and is used to drive the rotating seat rotates driving component,

[0006] The first rotating seat includes first connecting end for being fixedly connected with the stretched film component, second connecting end for being rotatably connected with the trough, and third connecting end for being connected with driving component;The second connecting end is located between the first connecting end and the third connecting end;

[0007] The driving component is used to drive the first rotating seat to rotate to horizontal or preset inclined position in cooperation with the stretched film component relative to the trough.

[0008] Further, the plane where the first rotating seat is located and the driving axis of the driving component form an included angle.

[0009] Further, the turnover driving mechanism further includes two fixing pieces, two the fixing piece is arranged at the opposite sides of the second connecting end, and the fixing piece is used to be fixedly connected with the trough;

[0010] The first rotating seat is rotatably connected with the fixing member through a first rotating shaft.

[0011] Further, the second connecting end is recessed to form a first space for accommodation, and an end of the fixing member rotatably connected with the first rotating seat is arranged in the first space for accommodation.

[0012] Further, one of the second connecting end of the first rotating seat and the fixing member is fixedly connected with the first rotating shaft, and the other is rotatably connected with the first rotating shaft.

[0013] Further, the first rotating seat is provided with a first rotating hole and at least one first abutting hole, and a first abutting member is arranged in the first abutting hole.

[0014] The first rotating hole is matched with the first rotating shaft.

[0015] The first abutting hole is communicated with the first rotating hole, and the first abutting member can abut against the side wall of the first rotating shaft to limit the rotation of the first rotating shaft relative to the first rotating hole.

[0016] Further, the turnover driving mechanism further comprises a second rotating seat, the second rotating seat is rotatably connected with the third connecting end of the first rotating seat through a second rotating shaft, and the second rotating seat is fixedly connected with the driving assembly.

[0017] The driving assembly drives the first rotating seat to rotate through the second rotating seat.

[0018] Further, the third connecting end is recessed to form a second space for accommodation, and an end of the second rotating seat rotatably connected with the first rotating seat is arranged in the second space for accommodation.

[0019] Further, one of the second rotating seat and the third connecting end of the first rotating seat is fixedly connected with the second rotating shaft, and the other is rotatably connected with the second rotating shaft.

[0020] Further, the second rotating seat is provided with a second rotating hole and at least one second abutting hole, and a second abutting member is arranged in the second abutting hole.

[0021] The second rotating hole is matched with the second rotating shaft.

[0022] The second abutting hole is communicated with the second rotating hole, and the second abutting member can abut against the side wall of the second rotating shaft to limit the rotation of the second rotating shaft relative to the second rotating hole.

[0023] Further, the driving assembly comprises a driving member and a telescopic member;

[0024] The driving member is in driving connection with one end of the telescopic member, and the other end of the telescopic member is in fixed connection with the second rotating seat, and the driving member is used for driving the telescopic member to extend or retract, so as to drive the first rotating seat to rotate through the second rotating seat.

[0025] Further, the telescopic member comprises a first shaft and a second shaft connected, and the diameter of the first shaft is greater than that of the second shaft;

[0026] The first shaft is in driving connection with the driving member, and the second shaft is in fixed connection with the second rotating seat.

[0027] Further, the second rotating seat is provided with a screw hole, the second shaft is provided with a threaded structure corresponding to the screw hole, and the second shaft is in threaded connection with the screw hole through the threaded structure.

[0028] Further, the second rotating seat is provided with a jacking platform, and the jacking platform is provided with a screw hole,

[0029] One end of the first shaft close to the second rotating seat is in abutment with one side of the jacking platform, and the second shaft is in fixed connection with a fastener after penetrating through the screw hole, and the fastener is in abutment with the other side of the jacking platform.

[0030] Further, the turnover driving mechanism further comprises a driving installation assembly, one side of the driving installation assembly is arranged between the two fixing members, and the other end of the fixing member is in rotary connection with the driving installation assembly through a third rotating shaft; and the driving member is fixedly installed on the driving installation assembly.

[0031] Further, one of the driving installation assembly and the fixing member is in fixed connection with the third rotating shaft, and the other of the driving installation assembly and the fixing member is in rotary connection with the third rotating shaft.

[0032] Further, the driving installation assembly is provided with a third rotating hole and at least one third abutment hole, and a third abutment member is arranged in the third abutment hole;

[0033] The third rotating hole is matched with the third rotating shaft;

[0034] The third abutment hole is in communication with the third rotating hole, and the third abutment member can abut against the side wall of the third rotating shaft to limit the rotation of the third rotating shaft relative to the third rotating hole.

[0035] The second aspect of the utility model also protects a turnover driving device, the turnover driving device comprises a film stretching assembly provided with a release film and a turnover driving mechanism as described above,

[0036] The first connecting end of the first rotating seat is fixedly connected with the film stretching assembly.

[0037] Further, the film stretching assembly comprises a film fixing frame for fixing the release film.

[0038] Further, the film stretching assembly further comprises a handle arranged on the film fixing frame.

[0039] Further, when the film stretching assembly is rotated to the maximum inclined position by the overturning driving mechanism relative to the trough, a gap can be left between the driving assembly and the trough.

[0040] The embodiments of the present application have at least the following beneficial effects:

[0041] The overturning driving mechanism can drive the first rotating seat to rotate the film stretching assembly to the horizontal or preset inclined position, so that the bubbles in the printing material liquid attached to the lower surface of the release film flow downward along the inclined lower surface of the release film in the printing material liquid, and the bubbles are driven to the non-printing area; in the process of overturning the film stretching assembly to the horizontal state, the release film and the printing material liquid in the inclined film stretching assembly gradually contact, avoiding the generation of bubbles between the release film and the printing material liquid, effectively avoiding the interference of the bubbles, and improving the printing quality; at the same time, the automation degree of the overturning driving mechanism is improved, and compared with the manual control mode, the application uses the driving assembly to drive the first rotating seat to overturn the film stretching assembly, which can avoid the displacement of the film stretching assembly relative to the trough, accurately control the moving speed and moving angle of the film stretching assembly relative to the trough, further improve the printing quality, and optimize the printing effect. BRIEF DESCRIPTION OF DRAWINGS

[0042] In order to more clearly illustrate the technical scheme of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.

[0043] Figure 1 The structure diagram of the overturning driving mechanism of the present embodiment;

[0044] Figure 2 The structure diagram of the overturning driving mechanism of the present embodiment;

[0045] Figure 3 The structure diagram of the first rotating seat of the present embodiment;

[0046] Figure 4 Fig. 3 is a structural view of the flip drive mechanism in the unfolded state according to the embodiment of the present application;

[0047] Figure 5 Fig. 4 is a structural view of the flip drive mechanism in the buckled state according to the embodiment of the present application.

[0048] In the drawings, the reference signs correspond to:

[0049] 1-tensioning film assembly; 2-trough; 4-handle; 21-receiving cavity; 31-first rotating seat; 32-fixing member; 33-drive assembly; 34-second rotating seat; 35-drive mounting assembly; 311-first rotating shaft; 312-first abutting hole; 313-first connecting hole; 314-clearance portion; 341-second rotating shaft; 342-second abutting hole; 343-clearance platform; 351-third rotating seat; 352-fixing seat; 3511-third rotating shaft; 3512-third abutting hole. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0051] It should be noted that the terms "first", "second" and the like in the description and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in other than the order illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0052] In the photocuring 3D printing process, the forming platform will perform a release operation, i.e. the cured material is separated from the release film. However, this operation will bring spatial vibration in the printing area, and a cavity will appear in a very short time. If air enters the cavity at this time, a bubble will be formed at this position. Specifically, the liquid surface of the printing liquid and the lower surface of the tensioning film assembly 1 often produce bubbles due to the downward movement of the forming platform for release. In order to prevent bubbles from affecting subsequent exposure processing, it is often necessary to eliminate the bubbles in the exposure area before exposure.

[0053] Referring to the drawings Figures 1-5The embodiment provides a turnover driving mechanism applied to a light curing device, the light curing device comprising a trough 2 and a film stretching assembly 1 provided with a release film, and the trough 2 is used for containing printing liquid. The trough 2 comprises a containing cavity 21 used for containing the printing liquid. The turnover driving mechanism comprises a first rotating seat 31 and a driving assembly 33 used for driving the first rotating seat 31 to rotate, the first rotating seat 31 comprises a first connecting end used for fixedly connecting with the film stretching assembly 1, a second connecting end used for rotationally connecting with the trough 2, and a third connecting end used for connecting with the driving assembly 33; the second connecting end is located between the first connecting end and the third connecting end; the driving assembly 33 is used for driving the first rotating seat 31 to rotate to a horizontal position or a preset inclined position in cooperation with the film stretching assembly 1 relative to the trough 2.

[0054] Through cooperation between the film stretching assembly 1 and the turnover driving mechanism, the turnover driving mechanism is driven to rotate, and then the film stretching assembly 1 is driven to cooperate with the release film on the film stretching assembly 1 to gradually contact the printing liquid in the containing cavity 21, at this time, in the process of gradual contact between the two, the bubbles in the printing liquid gradually move towards the edge of the release film, so that the to-be-exposed area is ensured to be free from bubble interference, or the turnover driving mechanism drives the film stretching assembly 1 to rotate to the release film on the film stretching assembly 1, and the release film can gradually separate from the printing liquid in the containing cavity 21, and in the process that the release film separates from the printing liquid in the containing cavity 21, due to the existence of the inclined angle, the bubbles in the printing liquid attached to the release film in the film stretching assembly 1 move towards the edge of the release film due to gravity, so that the to-be-exposed area on the film stretching assembly 1 is ensured to be free from bubble interference.

[0055] Through cooperation between the film stretching assembly and the turnover driving mechanism, the bubbles in the interface can be moved, and specific details are as follows:

[0056] The turnover driving mechanism and the film stretching assembly 1 are hard connected, after exposure and release are completed, the turnover driving mechanism rotates and then drives the film stretching assembly 1 to turn over, so that the film stretching assembly 1 is away from the printing liquid, at this time, a certain inclined angle is generated between the film stretching assembly 1 and the printing liquid surface. In the turning over process, most of the bubbles in the liquid surface will adhere to the lower surface of the release film in the film stretching assembly 1, and the bubbles will move downwards along the lower surface of the release film due to gravity, so that the bubbles will leave the generated area (the exposed area) to the non-printing area, so as not to affect the subsequent exposure process.

[0057] The film stretching assembly 1 is reset in the reverse direction after being rotated to a certain angle, so as to continue the printing process. During the resetting process, the turnover driving mechanism rotates the film stretching assembly 1 towards the liquid surface, and the release film on the film stretching assembly 1 gradually contacts the liquid surface, that is, the interface between the film stretching assembly 1 and the liquid surface moves from the side close to the turnover driving mechanism to the side away from the turnover driving mechanism, that is, the handle 4 position. This gradual linear contact method can exhaust the air between the film stretching assembly 1 and the printing liquid surface, so as to avoid the generation of new bubbles.

[0058] During the upward turning process of the film stretching assembly 1, the bubbles move to the non-printing area due to gravity; during the downward turning process of the film stretching assembly 1, the film stretching assembly 1 and the liquid surface gradually contact linearly, the bubbles move, and then it is ensured that the to-be-exposed area is not disturbed by bubbles, and the subsequent exposure is not affected.

[0059] The turnover driving mechanism can drive the driving assembly 33 to drive the first rotating seat 31 to drive the film stretching assembly 1 to rotate relative to the tank 2 to a horizontal or pre-set inclined position, so that the bubbles in the printing liquid attached to the lower surface of the release film are driven to flow along the inclined lower surface of the release film during the defoaming process, so that the bubbles are driven to the non-printing area; during the process of turning the film stretching assembly 1 to the horizontal state, the inclined film stretching assembly 1 gradually contacts the printing liquid, avoiding the generation of bubbles between the release film and the printing liquid, effectively avoiding the interference of bubbles and improving the printing quality; at the same time, the automation degree of the turnover driving mechanism is improved, and compared with the manual control mode, the application uses the driving assembly 33 to drive the first rotating seat to drive the film stretching assembly 1 to turn, which can avoid the displacement of the film stretching assembly 1 relative to the tank 2, accurately control the moving speed and moving angle of the film stretching assembly 1 relative to the tank 2, further improve the printing quality, and optimize the printing effect.

[0060] The relative position relationship between the film stretching assembly 1, the tank 2 and the first rotating seat 31 is not limited, as long as the first rotating seat 31 in the turnover driving mechanism can drive the film stretching assembly 1 to swing relative to the tank 2.

[0061] In the height direction, the tank 2, the film stretching assembly 1 and the first connecting end of the first rotating seat 31 are arranged in sequence, that is, the film stretching assembly 1 is arranged between the first connecting end of the first rotating seat 31 and the tank 2, and the first connecting end of the first rotating seat 31 is fixedly connected with the end surface of the film stretching assembly 1.

[0062] During the process of the release film in the film stretching assembly 1 moving to gradually linear contact with the printing liquid in the trough 2, the bubbles move towards the edge of the release film; during the process of the release film in the film stretching assembly 1 rotating from the state of contacting the printing liquid in the trough 2 to the state of not contacting the printing liquid, the release film can drive the bubbles to separate from the printing liquid, and then the bubbles are driven to the non-printing area, so that the effect of avoiding bubble interference is achieved. Compared with the prior art of using a scraper to remove bubbles, in the embodiment of the present application, no matter the size of the bubbles, the bubbles can be removed, the bubble removal efficiency is high, and the bubble removal effect is good.

[0063] In some possible embodiments, the driving assembly 33 can drive the first rotating seat 31 to move to a first limit position and a second limit position; when the first rotating seat 31 is at the first limit position, the release film in the film stretching assembly 1 is in contact with the printing liquid in the containing cavity 21; when the driving assembly 33 is at the second limit position, the release film in the film stretching assembly 1 is separated from the printing liquid in the containing cavity 21 and forms a certain inclination angle with the liquid surface of the printing liquid. By setting the first limit position, the release film can be ensured to be in contact with the printing liquid in the containing cavity 21, and then the release film on the film stretching assembly 1 can remove the bubbles in the printing liquid. By setting the second limit position, the release film on the film stretching assembly 1 can be moved to a state of being separated from the printing liquid in the containing cavity 21, and the bubbles on the interface are brought to the lower surface of the release film. By using the inclination of the release film, the bubbles attached to the lower surface of the release film are moved to the non-printing area along the lower surface of the release film under the action of gravity, so that the release film on the film stretching assembly 1 can remove the bubbles in the printing liquid even when it is separated from the printing liquid, thereby ensuring that the to-be-exposed area is not disturbed by the bubbles.

[0064] The driving assembly 33 can drive the first rotating seat 31 to move between the first limit position and the second limit position. By setting the first limit position and the second limit position, the first rotating seat 31 can be limited by the driving assembly 33, so that the first rotating seat 31 can not rotate to the limit position, thereby ensuring the movement stability of the first rotating seat 31 and the film stretching assembly 1 arranged thereon.

[0065] The driving assembly 33 drives the first rotating seat 31 to swing between the first limit position and the second limit position; when the first rotating seat 31 is at the first limit position, the included angle between the first rotating seat 31 and the trough 2 is a first included angle; when the first rotating seat 31 is at the second limit position, the included angle between the first rotating seat 31 and the trough 2 is a second included angle, and the second included angle is greater than the first included angle.

[0066] The angle of the second included angle is greater than 0° and less than 90°. By setting such a range, the opening angle of the film stretching assembly 1 can be increased.

[0067] In some possible embodiments, the second included angle ranges from 0° to 60°, so that the rotation stroke of the film stretching assembly 1 can be shortened on the premise of facilitating the disassembly of the release film, unnecessary rotation stroke can be avoided, driving force can be reduced, and other structures caused by the increase of the rotation stroke can be avoided, thereby ensuring the structural simplicity of the turnover driving mechanism. In the present application, the second included angle can be set according to actual needs, which is not limited here.

[0068] The inner side wall of the trough 2 is protrudingly provided with an abutting portion; in the case that the first rotating seat 31 can drive the film stretching assembly 1 to be buckled to the cavity opening of the accommodating cavity 21, the film stretching assembly 1 abuts against the abutting portion, so that the film stretching assembly 1 can be positioned.

[0069] A repeated positioning mechanism, such as a positioning ball, can be added to the turnover driving mechanism, so as to position the film stretching assembly 1 fixedly connected with the turnover driving mechanism at the same position, thereby ensuring the running stability.

[0070] The second connecting end of the first rotating seat 31 is provided with a first rotating shaft 311, and the first rotating seat 31 is rotationally connected with the trough 2 through the first rotating shaft 311. One of the second connecting end of the first rotating seat 31 and the trough 2 is fixedly connected with the first rotating shaft 311, and the other is rotationally connected with the first rotating shaft 311. Under the driving of the driving assembly 33, the first rotating shaft 311 can rotate relative to the trough 2, and the driving force of the driving assembly 33 can be transmitted to the first rotating shaft 311 through the first rotating seat 31, so that the first rotating seat 31 rotates relative to the trough 2, realizing that the driving assembly 33 drives the first rotating seat 31 to rotate relative to the trough 2 in cooperation with the film stretching assembly 1 under the cooperation of the first rotating shaft 311, thereby ensuring the running stability of the first rotating seat 31.

[0071] Please refer to Figure 1 and Figure 3 The turnover driving mechanism further comprises two fixing members 32, which are arranged on opposite sides of the second connecting end and are used for being fixedly connected with the trough 2; the first rotating seat 31 is rotationally connected with the fixing member 32 through the first rotating shaft 311. By fixing the fixing member 32 with the trough 2, the structure to be connected with the trough 2 can be transferred to be connected with the fixing member 32, without changing the original structure of the trough 2, only by adding the fixing member 32, the fixing of the turnover driving mechanism can be realized, so that the turnover driving mechanism can be arranged on any trough 2, thereby improving the adaptation range of the turnover driving mechanism to a certain extent.

[0072] The second connecting end is recessed to form a first accommodation space, and one end of the fixing member 32 rotationally connected with the first rotating seat 31 is arranged in the first accommodation space, so that the structure is compact.

[0073] Each of the fixing members 32 is provided with a first accommodating hole for accommodating two end portions of the first rotating shaft 311 and a second accommodating hole for accommodating two end portions of the third rotating shaft 3511 along the height direction of the fixing member 32.

[0074] The fixing member 32 is detachably fixedly connected to the outer side wall of the trough 2, and the second connecting end of the first rotating seat 31 is rotationally connected to the fixing member 32 through the first rotating shaft 311. Since the fixing member 32 is fixed to the trough 2, the first rotating seat 31 is rotationally connected to the fixing member 32, and it can also be considered that the first rotating seat 31 realizes the rotational connection with the trough 2 through the first rotating shaft 311 and the fixing member 32.

[0075] One of the second connecting end of the first rotating seat 31 and the fixing member 32 is fixedly connected to the first rotating shaft 311, and the other is rotationally connected to the first rotating shaft 311.

[0076] In some possible embodiments, the first rotating shaft 311 is integrally provided with the first rotating seat 31, or the first rotating shaft 311 is fixedly connected to the first rotating seat 31 through clamping, or the first rotating shaft 311 is fixedly connected to the first rotating seat 31 through abutting.

[0077] In some possible embodiments, the first rotating seat 31 is provided with a first rotating hole and at least one first abutting hole 312, and a first abutting member is arranged in the first abutting hole 312; the first rotating hole is matched with the first rotating shaft 311; the first abutting hole 312 is in communication with the first rotating hole, and the first abutting member can abut against the side wall of the first rotating shaft 311 to limit the rotation of the first rotating shaft 311 relative to the first rotating hole. By arranging the first rotating hole and the first abutting hole 312 that match with each other, the first abutting member arranged in the first abutting hole 312 can abut against the first rotating shaft 311, which can ensure that the first rotating shaft 311 and the first rotating seat 31 are relatively fixed and that the first rotating seat 31 can rotate synchronously with the first rotating shaft 311, so that the driving force of the driving assembly 33 can be transmitted to the first rotating shaft 311 through the first rotating seat 31, and then the first rotating seat 31 drives the film stretching assembly 1 to rotate relative to the trough 2, thereby ensuring the stability of the operation of the turnover driving mechanism.

[0078] Specifically, the axis of the first abutting hole 312 passes through the axis of the first rotating shaft 311. In this way, the contact area of the first abutting member and the first rotating shaft 311 can be increased, thereby ensuring the stability of the fixed connection of the first rotating shaft 311 and the first rotating seat 31 through the first abutting member.

[0079] The first abutting member and the first abutting hole 312 are arranged in one-to-one correspondence, and the number of the first abutting hole 312 is not limited, as long as it can cooperate with the first abutting member 312 to realize the synchronous rotation of the first rotating seat 31 and the first rotating shaft 311.

[0080] In some possible embodiments, the first rotating shaft 311 is provided with a clamping groove corresponding to the first rotating hole, and the first abutting member abuts against the clamping groove after extending into the first abutting hole 312. By arranging the clamping groove, the displacement of the first rotating shaft 311 from the first rotating seat 31 can be limited, thereby ensuring the stability of the fixed connection between the first rotating shaft 311 and the first rotating seat 31.

[0081] In some possible embodiments, the first rotating shaft 311 is provided with a mounting hole, the axis of the mounting hole passes through the axis of the first rotating shaft 311, and the mounting hole is arranged corresponding to the first abutting hole 312. After the first abutting member extends into the first abutting hole 312, the first abutting member extends into the mounting hole on the first rotating shaft 311, thereby realizing the fixed connection between the first rotating shaft 311 and the first rotating seat 31.

[0082] In some possible embodiments, the trough 2 is provided with a connecting portion, and the first rotating shaft 311 is fixedly connected to the second connecting end of the first rotating seat 31 through the connecting portion. The second connecting end of the first rotating seat 31 is rotatably connected to the trough 2 through the first rotating shaft 311.

[0083] Please refer to Figure 1 and Figure 2 The first connecting end of the first rotating seat 31 is provided with a first connecting hole 313, and the film stretching assembly 1 is provided with a mounting hole matched with the first connecting hole 313. The fastener sequentially passes through the first connecting hole 313 and the mounting hole, thereby realizing the fixed connection between the first connecting end of the first rotating seat 31 and the film stretching assembly 1.

[0084] The flip driving mechanism further comprises a second rotating seat 34, the second rotating seat 34 is rotatably connected to the third connecting end of the first rotating seat 31 through a second rotating shaft 341, and the second rotating seat 34 is fixedly connected to the driving assembly 33. The driving assembly 33 drives the first rotating seat 31 to rotate through the second rotating seat 34.

[0085] One of the second rotating seat 34 and the third connecting end of the first rotating seat 31 is fixedly connected to the second rotating shaft 341, and the other is rotatably connected to the second rotating shaft 341.

[0086] The third connecting end is recessed to form a second accommodation space, and one end of the second rotating seat 34 rotatably connected to the first rotating seat 31 is arranged in the second accommodation space.

[0087] The third connecting end of the first rotating seat 31 is provided with a third accommodating hole, and a part of the second rotating shaft 341 can be accommodated in the third accommodating hole.

[0088] The second rotating seat 34 is fixedly connected with the second rotating shaft 341, and the second rotating shaft 341 passes through the second rotating seat 34 and then passes through the third accommodating hole, so that the second rotating seat 34 rotates relative to the first rotating seat 31.

[0089] Please refer to Figure 1 The third connecting end of the first rotating seat 31 includes two oppositely arranged accommodation spaces, and the second accommodation space is arranged between the two accommodation spaces; one third accommodating hole is arranged on each of the two accommodation spaces, and the second rotating shaft 341 sequentially passes through the first third accommodating hole, the second rotating seat 34 and the second third accommodating hole, and the second rotating seat 34 can move relative to the first rotating seat 31 under the cooperation of the second rotating shaft 341.

[0090] The second rotating seat 34 is provided with a second rotating hole and at least one second abutting hole 342, and a second abutting member is arranged in the second abutting hole 342; the second rotating hole cooperates with the second rotating shaft 341; the second abutting hole 342 is in communication with the second rotating hole, and the second abutting member can abut against the side wall of the second rotating shaft 341 to limit the rotation of the second rotating shaft 341 relative to the second rotating hole. By arranging the second rotating hole and the second abutting hole 342 which cooperate with each other, the second abutting member arranged in the second abutting hole 342 can abut against the second rotating shaft 341, so as to ensure the relative fixation of the second rotating shaft 341 and the second rotating seat 34, ensure that the second rotating seat 34 can rotate synchronously with the second rotating shaft 341, so as to achieve that the driving force of the driving assembly 33 can be transmitted to the second rotating shaft 341 through the second rotating seat 34, and then realize the rotation of the second rotating seat 34 relative to the first rotating seat 31, and part of the driving force drives the first rotating seat 31 to rotate relative to the trough 2, so as to ensure the stability of the operation of the overturning driving mechanism.

[0091] In the embodiment, the structure and the corresponding mounting relationship of the second rotating shaft 341, the second rotating seat 34 and the second abutting member are the same as those of the first rotating shaft 311, the first rotating seat 31 and the first abutting member, and will not be described here.

[0092] The driving assembly 33 includes a driving member and an elastic member; the driving member is drivingly connected with one end of the elastic member, the other end of the elastic member is fixedly connected with the second rotating seat 34, and the driving member is used for driving the elastic member to stretch and contract, so as to drive the first rotating seat 31 to rotate through the second rotating seat 34.

[0093] In some possible embodiments, the telescopic member comprises a first shaft and a second shaft connected, the diameter of the first shaft is larger than that of the second shaft; the first shaft is in driving connection with the driving member, and the second shaft is in fixed connection with the second rotating base 34.

[0094] In some possible embodiments, the second rotating base 34 is provided with a screw hole, the second shaft is provided with a threaded structure corresponding to the screw hole, and the second shaft is in threaded connection with the screw hole through the threaded structure, so as to realize the fixed connection between the telescopic member and the second rotating base 34.

[0095] In some possible embodiments, the second rotating base 34 is provided with a screw hole, the second shaft is provided with a threaded structure corresponding to the screw hole, and the second shaft is in threaded connection with the screw hole through the threaded structure, so as to realize the fixed connection between the telescopic member and the second rotating base 34.

[0096] In the embodiment, the maximum range of the movement of the telescopic member driven by the driving member covers the movement range of the telescopic member corresponding to the turning angle interval of the film stretching assembly 1, so that the turning range of the release film can be met.

[0097] Specifically, the driving member is a motor, and the telescopic member is a telescopic rod.

[0098] The turning driving mechanism further comprises a driving installation assembly 35, one side of the driving installation assembly 35 is arranged between the two fixing members 32 and is in rotary connection with the other end of the fixing member 32 through a third rotating shaft 3511; the driving member is fixedly installed on the driving installation assembly 35.

[0099] Please refer to Figure 3 , Figure 1 and combine Figure 4 and Figure 5 , the second rotating base 34 and the film stretching assembly 1 are arranged at two ends of the first rotating base 31 respectively, the second rotating base 34 is provided with a second rotating shaft 341, and the second rotating base 34 is in rotary connection with the first rotating base 31 through the second rotating shaft 341; the driving member is in driving connection with one end of the telescopic member, the other end of the telescopic member is in fixed connection with the second rotating base 34, the driving member is used for driving the telescopic member to stretch or retract, and the second rotating base 34 is used for converting the stretching or retracting movement of the telescopic member into the rotation of the film stretching assembly 1 driven by the first rotating base 31 relative to the trough 2.

[0100] The plane where the first rotating seat 31 is located and the driving axis of the driving assembly 33 form an included angle, specifically, the plane where the first rotating seat 31 is located and the central axis of the telescopic piece form an included angle. In this way, when the driving piece drives the telescopic piece to move linearly back and forth, the second rotating seat 34 is rotatably connected to the first rotating seat 31 through the second rotating shaft 341, and the driving mounting assembly 35 is rotatably connected to the fixed piece 32 through the third rotating shaft 3511, which can effectively avoid the interference of each structural piece and being pulled and damaged when the telescopic piece moves linearly back and forth, further ensuring the connection stability of the device. The specific value of the included angle can be set according to actual needs, which is not limited here.

[0101] Through the mutual cooperation of each structural piece such as the driving piece, the telescopic piece, the second rotating seat 34, the first rotating seat 31 and the driving mounting assembly 35, the driving piece can drive the telescopic piece to extend and retract, and the second rotating seat 34 fixedly connected to the telescopic piece can be regarded as moving linearly back and forth as a whole with the telescopic piece, thereby driving the second rotating seat 34 and the second rotating shaft 341 to rotate synchronously relative to the first rotating seat 31, and driving the first rotating seat 31 and the first rotating shaft 311 to swing synchronously relative to the fixed piece 32. The force of the telescopic piece pushing the second rotating seat 34 can also pull the driving piece to move, thereby driving the driving mounting assembly 35 and the third rotating shaft 3511 fixedly connected to the driving piece to swing synchronously relative to the fixed piece 32, thereby effectively avoiding the damage of each structural piece in the reciprocating motion of the telescoping rod, further ensuring the connection stability of the device.

[0102] Under the pushing action of the telescopic piece, the second rotating seat 34 can rotate relative to the first rotating seat 31, and the first connecting end of the first rotating seat 31 moves downward under the upward pushing force of the third connecting end, realizing the approach of the release film connected to the first connecting end to the printing liquid in the trough; under the resetting action of the telescopic piece, the second rotating seat 34 can rotate relative to the first rotating seat 31, and the first connecting end of the first rotating seat 31 moves upward under the downward pulling force of the third connecting end, realizing the release of the release film. On the basis of ensuring stable operation, the turnover driving mechanism can convert the telescopic motion of the telescopic piece into the rotation of the second rotating seat 34 and the up-down rotation of the first rotating seat 31, simplifying the structure, reducing the preparation cost, and the structure is compact.

[0103] Please refer to Figure 1 and Figure 3The third rotating shaft 3511 is arranged on the driving mounting assembly 35, and the driving mounting assembly 35 is rotationally connected with the fixing member 32 through the third rotating shaft 3511. During the movement of the driving member driving the first rotating seat 31, the driving member drives the driving mounting assembly 35 to rotate relative to the fixing member 32. By arranging the third rotating shaft 3511 and rotationally connecting the third rotating shaft 3511 with the fixing member 32, it can be ensured that, during the movement of the driving member driving the first rotating seat 31, the movement of the driving member drives the driving mounting assembly 35 to rotate relative to the fixing member 32, avoiding the interference between the driving mounting assembly 35, the third rotating shaft 3511 and the fixing member 32 when the driving member moves, causing the second rotating seat 34 to be stuck during the rotation relative to the first rotating seat 31 or causing the tensioning film assembly 3 to have a small swing angle, thereby avoiding affecting the smoothness of the operation of the turnover driving mechanism or the bubble removing effect of the tensioning film assembly 3. It can be understood that the rotation angle of the driving mounting assembly 35 relative to the fixing member 32 corresponding to the movement range of the driving member is within the maximum rotation angle of the driving mounting assembly 35 relative to the fixing member 32.

[0104] One of the driving mounting assembly 35 and the fixing member 32 is fixedly connected with the third rotating shaft 3511, and the other of the driving mounting assembly 35 and the fixing member 32 is rotationally connected with the third rotating shaft 3511.

[0105] In some possible embodiments, referring to Figure 1 and Figure 3 The third rotating hole and at least one third abutting hole 3512 are arranged on the driving mounting assembly 35, and the third abutting member is arranged in the third abutting hole 3512. The third rotating hole is matched with the third rotating shaft 3511. The third abutting hole 3512 is in communication with the third rotating hole, and the third abutting member can abut against the side wall of the third rotating shaft 3511 to limit the rotation of the third rotating shaft 3511 relative to the third rotating hole. By arranging the third rotating hole and the third abutting hole 3512 matched with each other, the third abutting member arranged in the third abutting hole 3512 can abut against the third rotating shaft 3511, so as to ensure that the third rotating shaft 3511 and the driving mounting assembly 35 are relatively fixed, and ensure that the driving mounting assembly 35 can rotate synchronously with the third rotating shaft 3511, so that the driving force of the driving assembly 33 can be transmitted to the third rotating shaft 3511 through the driving mounting assembly 35, and the driving mounting assembly 35 is relatively rotated relative to the fixing member 32, thereby ensuring the stability of the operation of the turnover driving mechanism to a certain extent.

[0106] In the embodiment, the structure and the corresponding mounting relationship of the third rotating shaft 3511, the driving mounting assembly 35 and the third abutting member are the same as those of the first rotating shaft 311, the first rotating seat 31 and the first abutting member, and will not be described herein.

[0107] In the embodiment, please refer to Figure 3 The driving mounting assembly 35 comprises a third rotating seat 351 and a fixing seat 352 fixedly connected, the driving member is fixedly arranged on the fixing seat 352, the third rotating shaft 3511 passes through the first second accommodating hole, the third rotating seat 351 and the second second accommodating hole in sequence, and the two fixing members 32 are rotatably connected with the two sides of the third rotating seat 351 through the second accommodating hole and the third rotating shaft 3511 respectively.

[0108] In the embodiment, bearings are arranged in the first accommodating hole, the second accommodating hole and the third accommodating hole, so that the rotating shafts in the accommodating holes can stably rotate.

[0109] The driving assembly 33 is arranged in a spaced manner with the outer wall of the trough 2, the driving mounting assembly 35 is arranged on the fixing member 32, so that the driving assembly 33 is fixed on the trough 2, the driving assembly 33 is prevented from falling off, and the running stability of the driving assembly 33 is improved to a certain extent. When the turnover driving mechanism drives the membrane stretching assembly 1 to rotate to the maximum inclination position relative to the trough 2, a gap can be left between the driving assembly 33 and the trough 2, so that the driving assembly 33 can be prevented from being scratched or collided with the trough 2 in the movement process, and the safety of the driving assembly 33 is ensured.

[0110] In some possible embodiments, please refer to Figure 3 The turnover driving mechanism further comprises a handle 4, and the handle 4 is detachably connected with a corner of the membrane stretching assembly 1.

[0111] The bubble removing process of the turnover driving mechanism: the driving member drives the telescopic member to extend, so that the second rotating seat 34 moves away from the driving member and rotates relative to the first rotating seat 31 in cooperation with the second rotating shaft 341, the second rotating seat 34 drives the first rotating seat 31 to rotate relative to the fixing member 32 in the movement process, the release film on the membrane stretching assembly 1 fixedly connected with the first rotating seat 31 moves towards the trough 2 and gradually contacts the printing liquid in the trough 2, and the bubbles in the interface are driven to move towards the edge of the release film in the process that the release film gradually contacts the printing liquid, so that new bubbles are avoided between the release film and the printing liquid; the driving member drives the telescopic member to retract, so that the second rotating seat 34 moves towards the driving member and rotates relative to the first rotating seat 31 in cooperation with the second rotating shaft 341, the second rotating seat 34 drives the first rotating seat 31 to rotate relative to the fixing member 32 in the movement process, the release film on the membrane stretching assembly 1 fixedly connected with the first rotating seat 31 moves away from the trough 2 and gradually separates from the printing liquid in the trough 2, and the bubbles are attached to the lower surface of the release film with a small amount of printing liquid in the process that the release film separates from the liquid surface, and move to the non-printing area along the inclined lower surface of the release film under the action of gravity, so that the interference of the bubbles is effectively avoided.

[0112] The second aspect of this utility model also protects a flipping drive device, which includes a film stretching assembly 1 with a release film and the flipping drive mechanism as described above. The first connecting end of the first rotating seat 31 is fixedly connected to the film stretching assembly 1. The flipping drive device with the flipping drive mechanism can realize that the drive assembly 33 drives the first rotating seat 31 to rotate the film stretching assembly 1 relative to the material trough 2 to a horizontal or preset inclined position.

[0113] In some possible embodiments, the release film assembly 1 includes a release film fixing frame for fixing the release film. The release film is detachably connected to the release film fixing frame, which facilitates the removal and installation of the release film. The release film can be a soft film or a hard film.

[0114] like Figure 3 Figure 3 As shown, the membrane fixing frame is a quadrilateral frame structure, with the central area of ​​the quadrilateral frame structure used for light transmission. The structure and size of the membrane fixing frame are not limited, as long as it can secure the release film.

[0115] The film fixing frame is provided with a release film fixing position. When the release film in the film assembly 1 is in contact with the printing liquid in the receiving cavity 21, the film fixing frame and the release film set on it are both located directly above the receiving cavity 21.

[0116] In some possible embodiments, the film-stretching assembly 1 also includes a handle 4, which is disposed on the film-stretching fixing frame. By providing the handle 4, it is convenient for the user to manually operate the film-stretching assembly 1 or to operate the film-stretching assembly 1 even when the flipping drive mechanism fails. This avoids the inability to remove air bubbles when the flipping drive mechanism fails, thereby ensuring that the film-stretching assembly 1 can be flipped regardless of the state of the flipping drive mechanism.

[0117] The handle 4 is detachably mounted on the membrane fixing frame. The handle 4 includes a connecting part and a gripping part connected in sequence. The connecting part is detachably connected to the membrane fixing frame. The user's hand can grip the gripping part to drive the membrane assembly 1 to rotate relative to the material trough 2.

[0118] The drive component 33 can drive the first rotating seat 31 to rotate, so as to gradually bring the release film on the stretching assembly 1 into contact with or gradually separate from the printing liquid. By setting the drive component 33, the automation level of the flipping drive mechanism can be improved. Compared with manual control, the method of using the drive component 33 to drive the stretching assembly 1 to flip can avoid the stretching assembly 1 from shifting relative to the material tank 2, and accurately control the moving speed and moving angle of the stretching assembly 1 relative to the material tank 2, thereby further improving the printing quality and optimizing the printing effect.

[0119] When the turnover driving mechanism drives the film stretching assembly 1 to rotate to the maximum inclined position relative to the trough 2, a gap can be left between the driving assembly 33 and the trough 2, i.e. the driving assembly 33 is spaced apart from the outer wall of the trough 2, a safety gap is left, the driving assembly 33 can avoid scratching or colliding with the trough 2 during movement, the safety of the driving assembly 33 is ensured, and the service life of the driving assembly 33 and the trough 2 is ensured.

[0120] In the embodiment, the gap between the driving assembly 33 and the trough 2 is not set, as long as a gap is left between the driving assembly 33 and the trough when the driving assembly 33 is operated to any position.

[0121] Although the utility model has been described through preferred embodiments, the utility model is not limited to the embodiments described herein, and various changes and variations made without departing from the scope of the utility model are also included.

[0122] In this paper, the front, back, up, down and other orientation words are defined by the position of the parts in the drawing and the position of the parts relative to each other in the drawing, just to express the clarity and convenience of the technical scheme. It should be understood that the use of the orientation words should not limit the scope of the utility model claimed.

[0123] In the case of no conflict, the above-mentioned embodiments and the features in the embodiments can be combined with each other.

[0124] The above disclosure is only a preferred embodiment of the utility model, and of course cannot limit the scope of the utility model, so equivalent changes made according to the claims of the utility model still belong to the scope covered by the utility model.

Claims

1. A turnover driving mechanism applied to a light curing device, the light curing device comprising a vat (2) for containing printing liquid and a film stretching assembly (1) provided with a release film, characterized in that, The turnover driving mechanism comprises a first rotating seat (31) and a driving assembly (33) for driving the first rotating seat (31) to rotate, The first rotating seat (31) comprises a first connecting end for fixed connection with the membrane stretching assembly (1), a second connecting end for rotating connection with the trough (2), and a third connecting end for connection with the driving assembly (33); the second connecting end is located between the first connecting end and the third connecting end; The driving assembly (33) is used for driving the first rotating seat (31) to rotate to a horizontal or preset inclined position together with the membrane stretching assembly (1) relative to the trough (2).

2. The flip drive mechanism of claim 1, wherein, An included angle is formed between the plane where the first rotating seat (31) is located and the driving axis of the driving assembly (33).

3. The flip drive mechanism of claim 1, wherein, The turnover driving mechanism further comprises two fixing members (32), the two fixing members (32) are arranged on opposite sides of the second connecting end, and the fixing members (32) are used for fixed connection with the trough (2). The first rotating seat (31) is rotatably connected with the fixing members (32) through a first rotating shaft (311).

4. The flip drive mechanism of claim 3, wherein, The second connecting end is recessed to form a first accommodation space, and one end of the fixing members (32) rotatably connected with the first rotating seat (31) is arranged in the first accommodation space.

5. The flip drive mechanism of claim 3, wherein, One of the second connecting end of the first rotating seat (31) and the fixing members (32) is fixedly connected with the first rotating shaft (311), and the other is rotatably connected with the first rotating shaft (311).

6. The flip drive mechanism of claim 5, wherein, The first rotating seat (31) is provided with a first rotating hole and at least one first abutting hole (312), and a first abutting member is arranged in the first abutting hole (312); The first rotating hole is matched with the first rotating shaft (311); The first abutting hole (312) is in communication with the first rotating hole, and the first abutting member can abut against the side wall of the first rotating shaft (311) to limit the rotation of the first rotating shaft (311) relative to the first rotating hole.

7. The flip drive mechanism of claim 3, wherein, The turnover driving mechanism further comprises a second rotating seat (34), the second rotating seat (34) is rotatably connected with the third connecting end of the first rotating seat (31) through a second rotating shaft (341), and the second rotating seat (34) is fixedly connected with the driving assembly (33); The driving assembly (33) drives the first rotating seat (31) to rotate through the second rotating seat (34).

8. The flip drive mechanism of claim 7, wherein, The third connecting end is recessed to form a second accommodation space, and one end of the second rotating seat (34) rotatably connected with the first rotating seat (31) is arranged in the second accommodation space.

9. The flip drive mechanism of claim 8, wherein, One of the second rotating seat (34) and the third connecting end of the first rotating seat (31) is fixedly connected with the second rotating shaft (341), and the other is rotatably connected with the second rotating shaft (341).

10. The flip drive mechanism of claim 7, wherein, The second rotating seat (34) is provided with a second rotating hole and at least one second abutting hole (342), and the second abutting hole (342) is provided with a second abutting piece; The second rotating hole is matched with the second rotating shaft (341); The second abutting hole (342) is communicated with the second rotating hole, and the second abutting piece can abut against the side wall of the second rotating shaft (341) to limit the rotation of the second rotating shaft (341) relative to the second rotating hole.

11. The flip drive mechanism of claim 7, wherein, The driving assembly (33) comprises a driving piece and a telescopic piece; The driving piece is drivingly connected with one end of the telescopic piece, and the other end of the telescopic piece is fixedly connected with the second rotating seat (34), and the driving piece is used for driving the telescopic piece to extend or retract, so as to drive the first rotating seat (31) to rotate through the second rotating seat (34).

12. The flip drive mechanism of claim 11, wherein, The telescopic piece comprises a first shaft and a second shaft connected with each other, and the diameter of the first shaft is greater than that of the second shaft; The first shaft is drivingly connected with the driving piece, and the second shaft is fixedly connected with the second rotating seat (34).

13. The flip drive mechanism of claim 12, wherein, The second rotating seat (34) is provided with a screw hole, and the second shaft is provided with a threaded structure corresponding to the screw hole, and the second shaft is threadedly connected with the screw hole through the threaded structure.

14. The flip drive mechanism of claim 12, wherein, The second rotating seat (34) is provided with a positioning platform (343), and the positioning platform (343) is provided with a screw hole, One end of the first shaft close to the second rotating seat (34) abuts against one side of the positioning platform (343), and the second shaft is fixedly connected with a fastener after penetrating through the screw hole, and the fastener abuts against the other side of the positioning platform (343).

15. The flip drive mechanism of claim 11, wherein, The turnover driving mechanism further comprises a driving installation assembly (35), one side of the driving installation assembly (35) is arranged between the two fixing pieces (32), and the other end of the fixing piece (32) is rotatably connected with the driving installation assembly (35) through a third rotating shaft (3511); and the driving piece is fixedly installed on the driving installation assembly (35).

16. The flip drive mechanism of claim 15, wherein, One of the driving installation assembly (35) and the fixing piece (32) is fixedly connected with the third rotating shaft (3511), and the other of the driving installation assembly (35) and the fixing piece (32) is rotatably connected with the third rotating shaft (3511).

17. The flip drive mechanism of claim 16, wherein, The driving installation assembly (35) is provided with a third rotating hole and at least one third abutting hole (3512), and the third abutting hole (3512) is provided with a third abutting piece; The third rotating hole is matched with the third rotating shaft (3511); The third abutting hole (3512) is communicated with the third rotating hole, and the third abutting piece can abut against the side wall of the third rotating shaft (3511) to limit the rotation of the third rotating shaft (3511) relative to the third rotating hole.

18. A roll-over drive apparatus characterized by, The turnover driving device comprises a film stretching assembly (1) provided with a release film and the turnover driving mechanism according to any one of claims 1-17, The first connecting end of the first rotating seat (31) is fixedly connected with the film stretching assembly (1).

19. The roll-over drive apparatus of claim 18, wherein, The film stretching assembly (1) comprises a film fixing frame for fixing the release film.

20. The roll-over drive apparatus of claim 19, wherein, The film stretching assembly (1) further comprises a handle (4) arranged on the film fixing frame.

21. The roll-over drive apparatus of claim 18, wherein, When the film stretching assembly (1) is rotated to the maximum inclination position relative to the trough (2) by the overturning driving mechanism, a gap can be left between the driving assembly (33) and the trough (2).

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