Cinema lens adjustment driving module

Abstract

The utility model discloses a cinema lens adjusting and driving module, which is characterized in that a fixed support is provided with two adjusting and driving mechanisms, each adjusting and driving mechanism comprises a gear motor, a power output shaft of the gear motor is connected with a vertically arranged driving rotating shaft, and the end part of one side, far away from the gear motor, of the driving rotating shaft is provided with a rotating shaft external thread rod part; a nut is screwed on the external threaded rod part of the rotating shaft; the driving rotating shaft is provided with a rotating shaft retaining shoulder with the normal direction facing the nut, the driving rotating shaft is sleeved with a driving gear and a compression spring between the rotating shaft retaining shoulder and the nut, the two ends of the compression spring abut against the driving gear and the nut on the corresponding side respectively, and the end face of the driving gear makes contact with the rotating shaft retaining shoulder. The adjusting driving mechanism further comprises an output end gear, and the driving gear is in driving connection with the output end gear. By means of the structural design, the double-projection-lens focusing adjusting device has the advantages of being novel in structural design, good in stability and reliability and capable of being effectively suitable for focusing adjustment of double projection lenses of the 3D projector.

Description

Technical Field

[0001] The utility model relates to the technical field of lens adjustment drive modules, in particular to a cinema lens adjustment drive module. Background Art

[0002] A 3D projector in a cinema includes two projection lenses. When in use, each projection lens needs to be adaptively focused to ensure image clarity of the 3D projector.

[0003] The patent number is ZL202420006029.X, and the patent name is: A Chinese utility model patent for a mechanical autofocus imaging component, which discloses the following technical solutions, specifically:

[0004] A mechanical autofocus imaging component includes a stepping motor and a lens group. The stepping motor is provided with a motor gear, and the stepping motor is arranged on a lens bracket. The lens group is provided with an imaging lens, a lens follower, a cam active member, and a straight groove fixing member in sequence from the front end to the rear end of the lens bracket. The imaging lens is connected and fixed to the lens follower. The cam active member is provided with a cam active member gear and a rising angle opening. The straight groove fixing member is provided with a vertical opening. A stop pin passes through the cam active member opening from the straight groove fixing member opening and is fixed to the lens follower, so that the lens follower, the cam active member and the straight groove fixing member are linked. During operation, the motor gear drives the cam active member gear to rotate, thereby driving the stop pin to move back and forth, so that the imaging lens moves back and forth.

[0005] It should be pointed out that, for the above-mentioned mechanical autofocus imaging component, the stepper motor and the motor gear constitute a lens adjustment drive module.

[0006] The lens adjustment drive module of the mechanical autofocus imaging assembly has the following defects, specifically:

[0007] Defect 1: It is not suitable for the dual projection lens focus adjustment of 3D projectors;

[0008] Defect 2: The stepper motor directly drives the motor gear to rotate, and the motor gear directly serves as the output end structure of the lens adjustment drive module. When the projection lens is subjected to a large impact force, due to the lack of an effective buffer protection structure, the projection lens will directly transmit the impact load to the stepper motor, which will cause damage to the stepper motor and poor stability and reliability. Utility Model Content

[0009] The purpose of the present invention is to provide a cinema lens adjustment drive module to address the deficiencies of the existing technology. The cinema lens adjustment drive module has a novel structural design, good stability and reliability, and can be effectively applied to the focus adjustment of the dual projection lenses of a 3D projector.

[0010] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions.

[0011] A cinema lens adjustment drive module includes a fixed bracket, the fixed bracket being equipped with two adjustment drive mechanisms spaced apart from each other.

[0012] The adjustment drive mechanism includes a reduction motor fastened to a fixed bracket, a power output shaft of the reduction motor is connected to a vertically arranged drive shaft, an end of the drive shaft away from the reduction motor is provided with an externally threaded shaft rod, and a nut is screwed onto the externally threaded shaft rod; the drive shaft is provided with a shaft shoulder with a normal direction toward the nut, a drive gear and a compression spring are fitted between the shaft shoulder and the nut, the two ends of the compression spring are respectively in contact with the drive gear and the nut on the corresponding side, and the end face of the drive gear is in contact with the shaft shoulder;

[0013] The adjustment drive mechanism also includes an output end gear, and the driving gear is drivingly connected to the output end gear.

[0014] Wherein, the adjustment drive mechanism further includes a duplex gear located between the drive gear and the output end gear, and the output end gear and the duplex gear are respectively mounted on the fixed bracket through gear shafts;

[0015] The large gear of the duplex gear is meshed with the driving gear, and the small gear of the duplex gear is meshed with the output end gear.

[0016] Wherein, the driving shaft is provided with a spring washer located between the compression spring and the nut, the spring washer is in contact with the nut, and the end of the compression spring abuts against the spring washer.

[0017] Wherein, the fixing bracket includes a dustproof outer frame, and a frame accommodating cavity opened to one side is formed inside the dustproof outer frame;

[0018] A fixed mounting plate is installed in the enclosure cavity corresponding to each of the adjustment drive mechanisms, and each of the adjustment drive mechanisms is installed on the corresponding fixed mounting plate.

[0019] Compared with the prior art, the present invention has the following beneficial effects, specifically:

[0020] 1. The cinema lens adjustment drive module of the present invention has two adjustment drive mechanisms spaced apart from each other. When in use, each adjustment drive mechanism can be used to drive one of the projection lenses to perform focus adjustment. In other words, the present invention is effectively applicable to the focus adjustment of dual projection lenses in 3D projectors.

[0021] 2. When the projection lens is subjected to a large impact force, the projection lens transmits the impact load to the drive gear. When the impact load is greater than the friction between the drive gear and the shaft shoulder, the drive gear will slip and rotate, thereby achieving buffer protection for the reduction motor and improving overall stability and reliability.

[0022] 3. Therefore, the utility model has the advantages of novel structural design, good stability and reliability, and can be effectively applied to the focus adjustment of the dual projection lenses of the 3D projector. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below with reference to the accompanying drawings. However, the embodiments in the accompanying drawings do not constitute any limitation to the present invention.

[0024] Figure 1 It is a structural diagram of the present utility model.

[0025] Figure 2 for Figure 1 A partial enlarged schematic diagram.

[0026] Figure 3 This is a structural diagram of the utility model from another perspective.

[0027] Figure 4 It is a partial cross-sectional schematic diagram of the present utility model.

[0028] exist Figures 1 to 4 These include:

[0029] 1-Fixed bracket; 11-Dustproof frame; 111-Frame accommodating cavity; 12-Fixed mounting plate; 2-Adjusting drive mechanism; 21-Reduction motor; 22-Drive shaft; 221-Shaft external threaded rod; 222-Shaft shoulder; 23-Nut; 24-Drive gear; 25-Compression spring; 26-Output end gear; 27-Double gear; 271-Large gear; 272-Small gear; 28-Gear shaft 29-Spring washer. DETAILED DESCRIPTION

[0030] The present invention will be described below in conjunction with specific implementation methods.

[0031] Example 1, as Figure 1 and Figure 3 As shown, a cinema lens adjustment drive module includes a fixed bracket 1, and the fixed bracket 1 is equipped with two adjustment drive mechanisms 2 arranged at intervals on the left and right.

[0032] Among them, such as Figures 1 to 4As shown, the adjustment drive mechanism 2 includes a reduction motor 21 fastened to the fixed bracket 1, and the power output shaft of the reduction motor 21 is connected to a vertically arranged driving shaft 22, and the end of the driving shaft 22 away from the reduction motor 21 is provided with a shaft external threaded rod 221, and the shaft external threaded rod 221 is screwed with a nut 23; the driving shaft 22 is provided with a shaft shoulder 222 with the normal direction facing the nut 23, and the driving shaft 22 is provided with a driving gear 24 and a compression spring 25 between the shaft shoulder 222 and the nut 23, and the two ends of the compression spring 25 are respectively in contact with the driving gear 24 and the nut 23 on the corresponding sides, and the end face of the driving gear 24 is in contact with the shaft shoulder 222.

[0033] Further, such as Figures 1 to 4 As shown, the adjustment drive mechanism 2 further includes an output end gear 26 , and the drive gear 24 is drivingly connected to the output end gear 26 .

[0034] For the adjustment drive mechanism 2 of the first embodiment of the present invention, during the rotation of the output end gear 26, the reduction motor 21 is started and the reduction motor 21 drives the driving shaft 22 to rotate synchronously through its power output shaft. The elastic force of the compression spring 25 creates friction between the driving gear 24 and the shaft shoulder 222. The friction causes the driving gear 24 to rotate synchronously with the driving shaft 22, and the rotating driving gear 24 drives the output end gear 26 to rotate.

[0035] It should be noted that the cinema lens adjustment drive module of the first embodiment has two adjustment drive mechanisms 2 arranged at intervals on the left and right. When in use, each adjustment drive mechanism 2 can be used to drive one of the projection lenses to perform focus adjustment. That is, the cinema lens adjustment drive module of the first embodiment can be effectively applied to the focus adjustment of the dual projection lenses of the 3D projector.

[0036] It should be emphasized that when the projection lens is subjected to a large impact force, the projection lens will transmit the impact load to the drive gear 24; when the impact load is greater than the friction between the drive gear 24 and the shaft shoulder 222, the drive gear 24 will slip and rotate to achieve buffering protection for the reduction motor 21, thereby improving the overall stability and reliability.

[0037] In summary, it can be seen that, through the above structural design, the cinema lens adjustment drive module of the first embodiment has the advantages of novel structural design, good stability and reliability, and can be effectively applied to the focus adjustment of the dual projection lenses of the 3D projector.

[0038] Example 2, as Figure 2 and Figure 3As shown, the difference between the second embodiment and the first embodiment is that the adjustment drive mechanism 2 further includes a double gear 27 located between the drive gear 24 and the output end gear 26, and the output end gear 26 and the double gear 27 are respectively installed on the fixed bracket 1 through the gear shaft 28.

[0039] The large gear 271 of the double gear 27 is meshed with the driving gear 24 , and the small gear 272 of the double gear 27 is meshed with the output end gear 26 .

[0040] During the process of the driving gear 24 driving the output end gear 26 to rotate, the second embodiment realizes a reduction transmission through the double gear 27 located between the driving gear 24 and the output end gear 26 to increase the output torque of the regulating drive mechanism 2 .

[0041] Example 3, as Figure 4 As shown, the difference between the third embodiment and the first embodiment is that the driving shaft 22 is provided with a spring washer 29 located between the compression spring 25 and the nut 23 , the spring washer 29 is in contact with the nut 23 , and the end of the compression spring 25 abuts against the spring washer 29 .

[0042] Example 4, as Figures 1 to 4 As shown, the difference between the fourth embodiment and the first embodiment is that the fixing bracket 1 includes a dustproof outer frame 11 , and a frame accommodating cavity 111 opened toward one side is formed inside the dustproof outer frame.

[0043] A fixed mounting plate 12 is installed in the frame accommodating cavity 111 corresponding to each adjustment driving mechanism 2 , and each adjustment driving mechanism 2 is installed on the corresponding fixed mounting plate 12 .

[0044] It should be explained that the dustproof frame 11 of the fourth embodiment is fastened to the side of the outer shell of the 3D projector, and each adjustment drive mechanism 2 of the fourth embodiment is respectively located in the frame accommodating cavity 111 of the dustproof frame 11. The dustproof frame 11 can provide dustproof protection for the adjustment drive mechanism 2.

[0045] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation methods and application scope. The content of this specification should not be understood as limiting the present invention.

Claims

1. A cinema lens adjustment drive module, comprising a fixed bracket (1), characterized in that: The fixed bracket (1) is equipped with two adjustment drive mechanisms (2) spaced apart on the left and right sides; The regulating drive mechanism (2) includes a reduction motor (21) fixedly mounted on a fixed bracket (1), a power output shaft of the reduction motor (21) is connected to a driving shaft (22) arranged vertically, an end of the driving shaft (22) away from the reduction motor (21) is provided with a shaft external threaded rod (221), and a nut (23) is screwed onto the shaft external threaded rod (221); the driving shaft (22) is provided with a shaft shoulder (222) with a normal direction toward the nut (23), and the driving shaft (22) is provided with a driving gear (24) and a compression spring (25) between the shaft shoulder (222) and the nut (23), and both ends of the compression spring (25) are respectively in contact with the driving gear (24) and the nut (23) on the corresponding side, and the end face of the driving gear (24) is in contact with the shaft shoulder (222); The regulating drive mechanism (2) further includes an output end gear (26), and the driving gear (24) is drivingly connected to the output end gear (26).

2. The cinema lens adjustment drive module according to claim 1, characterized in that: The regulating drive mechanism (2) further includes a double gear (27) located between the driving gear (24) and the output end gear (26), and the output end gear (26) and the double gear (27) are respectively mounted on the fixed bracket (1) via a gear shaft (28); The large gear (271) of the double gear (27) is meshed with the driving gear (24), and the small gear (272) of the double gear (27) is meshed with the output end gear (26).

3. The cinema lens adjustment drive module according to claim 1, characterized in that: The driving shaft (22) is provided with a spring washer (29) between the compression spring (25) and the nut (23), the spring washer (29) is in contact with the nut (23), and the end of the compression spring (25) abuts against the spring washer (29).

4. The cinema lens adjustment drive module according to claim 1, characterized in that: The fixing bracket (1) comprises a dustproof outer frame (11), and a frame accommodating cavity (111) opened toward one side is formed inside the dustproof outer frame; A fixed mounting plate (12) is installed in the enclosure accommodating cavity (111) corresponding to each of the adjustment drive mechanisms (2), and each of the adjustment drive mechanisms (2) is installed on a corresponding fixed mounting plate (12).

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