Focuser

Abstract

The present invention discloses a focuser, comprising a mounting seat, a focus adjustment component, an electric drive component and a circuit board component. The mounting seat is used for fixing a shooting camera. The focus adjustment component comprises a focus gear ring, which is used for being sleeved and fixed on a focus ring of the shooting camera. The electric drive component is arranged on the mounting seat. The electric drive component comprises a driving gear rotatably mounted on the mounting seat, the driving gear meshing with the outside of the focusing gear ring. The circuit board component is electrically connected to the electric drive component, and a control signal is outputted through the circuit board to control the electric drive component to drive the driving gear to rotate, so that the focusing gear ring meshing with the outside of the driving gear rotates, so as to realize the remote focal distance adjustment and optical zoom of the shooting camera.

Description

Technical Field

[0001] The present invention relates to the field of photographic technology, and in particular to a focuser. Background Art

[0002] In recent years, with the increase in the number of photography enthusiasts, the demand for photography accessories that meet various shooting purposes has also increased. For example, in order to achieve shooting between scenes at different distances, the focus distance adjustment and optical zoom function of the zoom lens will be used to achieve this. Many electric focusing devices that assist the zoom lens to achieve this have appeared on the market. However, in some special occasions where remote shooting is required, the camera lens needs to be remotely adjusted in focus distance and optical zoom during the remote shooting process. The existing focusing devices cannot solve the problem of remote focus distance adjustment and optical zoom of the shooting camera. Summary of the invention

[0003] The main purpose of the present invention is to provide a focus adjuster, aiming to solve the problem that the existing focus adjuster cannot well solve the problem of remote focus distance adjustment and optical zoom of the shooting camera.

[0004] To achieve the above object, the focuser proposed by the present invention comprises:

[0005] A mounting base, used for fixing and mounting a shooting camera;

[0006] A focus adjustment component, comprising a focus gear ring, wherein the focus gear ring is used to be sleeved and fixed on the focus ring of the shooting camera;

[0007] an electric drive assembly, disposed on the mounting seat, the electric drive assembly comprising a drive gear rotatably mounted to the mounting seat, the drive gear being meshed with the outer ring of the focusing gear; and

[0008] A circuit board assembly is electrically connected to the electric drive assembly.

[0009] Optionally, the mounting seat comprises:

[0010] The mounting base body is used to fix the camera; and

[0011] A mounting plate extending in the horizontal direction, wherein the mounting plate is movably mounted on the mounting seat body in the vertical direction;

[0012] Wherein, the electric drive assembly is mounted to the mounting plate.

[0013] Optionally, the extension direction of the axis of the driving gear is taken as the front-to-back direction;

[0014] The mounting seat body comprises two support rods extending in the vertical direction, and the two support rods are arranged at intervals in the left-right direction;

[0015] The mounting plate is straddled between the two support rods, and a penetration space is formed between the mounting plate and the two support rods below the mounting plate for the camera to be penetrated and installed.

[0016] Optionally, the mounting seat further comprises two first sliding sleeves respectively sleeved on the two support rods, and a threaded hole is penetrated on the outer side surface of each of the first sliding sleeves;

[0017] The left and right ends of the mounting plate are respectively fixed on the two first sliding sleeves;

[0018] The focuser also includes two first adjustment locking rods, which are respectively threadedly installed in the threaded holes, and the end faces of the first adjustment locking rods are arranged to press against the outer side faces of the support rods so that the mounting plate is fixedly installed on the support rods.

[0019] Optionally, the electric drive assembly is movably mounted on the mounting plate in an up-and-down direction.

[0020] Optionally, a height adjustment component is further included, and the height adjustment component includes:

[0021] A bracket, comprising a horizontal plate installed above the mounting plate and extending in the horizontal direction, wherein a placement space is formed between the horizontal plate and the mounting plate for placing the electric drive assembly;

[0022] an adjusting rod, movably inserted into the horizontal plate in the up-down direction, and the lower end surface of the adjusting rod abuts against the upper end surface of the electric drive assembly; and

[0023] The elastic pressing component is arranged between the mounting plate and the electric drive component, and is used for elastically abutting against the lower end surface of the electric drive component.

[0024] Optionally, a mounting hole is formed through the upper end surface of the horizontal plate, and an inner wall surface of the mounting hole is provided with an internal thread;

[0025] The outer side surface of the adjusting rod is provided with an external thread matched with the internal thread, and the adjusting rod is installed in the installation hole corresponding to the thread.

[0026] Optionally, the elastic pressing component includes:

[0027] A positioning column is extended in the up-down direction, and the lower end of the positioning column is mounted on the mounting plate;

[0028] a spring, the lower end of which is sleeved on the positioning post; and

[0029] The sleeve is arranged at the upper end of the spring and abuts against the lower end surface of the electric drive assembly.

[0030] Optionally, the bracket further includes a bracket rod extending in an up-down direction;

[0031] The height adjustment assembly further comprises a guide slider movably mounted on the support rod, and the guide slider is mounted on the electric drive assembly.

[0032] Optionally, a guide structure is provided between the bracket and the mounting plate, the guide structure comprising a guide groove and a guide protrusion matching the guide groove, one of the guide groove and the guide protrusion is located on the bracket, and the other is located on the mounting plate.

[0033] In the technical solution provided by the present invention, the focuser includes a mounting seat, a focus adjustment component, an electric drive component and a circuit board component. The mounting seat is used to fix the shooting camera. The focus adjustment component includes a focus gear ring, and the focus gear ring is used to be mounted and fixed on the focus ring of the shooting camera. The electric drive component is arranged on the mounting seat. The electric drive component includes a driving gear rotatably mounted to the mounting seat, and the driving gear is meshed with the outside of the focusing gear ring. The circuit board assembly is electrically connected to the electric drive component, and a control signal is output through the circuit board to control the electric drive component to drive the driving gear to rotate, so that the focusing gear ring meshed with the outside of the driving gear rotates, so as to realize the remote focal distance adjustment and optical zoom of the shooting camera. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0035] Figure 1 A schematic structural diagram of a first embodiment of the focuser installation provided by the present invention;

[0036] Figure 2 for Figure 1 The main schematic diagram of the installation of the center focuser;

[0037] Figure 3 for Figure 1 Schematic diagram of the structure of the mid-height adjustment component;

[0038] Figure 4 for Figure 3 Schematic diagram of the structure of the split mid-height adjustment component.

[0039] Description of Figure Numbers:

[0040]

[0041]

[0042] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0045] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0046] In recent years, with the increase in the number of photography enthusiasts, the demand for photography accessories that meet various shooting purposes has also increased. For example, in order to achieve shooting between scenes at different distances, the focus distance adjustment and optical zoom function of the zoom lens will be used to achieve this. Many electric focusing devices that assist the zoom lens to achieve this have appeared on the market. However, in some special occasions where remote shooting is required, the camera lens needs to be remotely focused and optically zoomed during the remote shooting process. The existing focusing devices cannot solve the problem of remote focus distance adjustment and optical zoom of the shooting camera.

[0047] The main purpose of the present invention is to provide a focus adjuster, aiming to solve the problem that the existing focus adjuster cannot well solve the problem of remote focus distance adjustment and optical zoom of the shooting camera. Figures 1 to 4 is a schematic diagram of an embodiment of the focus adjuster.

[0048] See also Figure 1 to Figure 2 The focuser 100 includes a mounting base 1, a focus adjustment component 2, an electric drive component 3 and a circuit board component. The mounting base 1 is used to fix the shooting camera 1000. The focus adjustment component 2 includes a focus gear ring 21. The focus gear ring 21 is used to be mounted and fixed on the focus ring of the shooting camera 1000. The electric drive component 3 is arranged on the mounting base 1. The electric drive component 3 includes a driving gear 31 rotatably mounted to the mounting base 1. The driving gear 31 is meshed with the outside of the focusing gear ring 21. The circuit board component is electrically connected to the electric drive component 3.

[0049] In the technical solution provided by the present invention, the circuit board assembly receives and outputs control signals to control the electric drive assembly 3 to drive the drive gear 31 to rotate, so that the focusing gear ring 21 meshing with the outside of the drive gear 31 rotates, driving the focusing ring of the shooting camera 1000 to rotate, so as to realize the remote focal distance adjustment and optical zoom of the shooting camera 1000.

[0050] It should be noted that the electric drive component 3 is drivingly connected to the driving gear 31. In the present embodiment, a driving disk a coaxial with the driving gear 31 is provided at the output end of the electric drive component 3. The driving disk a can be detachably mounted on the driving gear 31. With such a configuration, when the driving gear 31 is worn during long-term use, it is convenient to replace the driving gear 31.

[0051] Taking into account that the driving gear 31 and the focusing gear ring 21 need to be adjusted during actual use so that the driving gear 31 and the focusing gear ring 21 can be accurately meshed, in the present embodiment, the mounting seat 1 includes a mounting seat body 11 and a mounting plate 12, the mounting seat body 11 is used to fix the shooting camera 1000, the mounting plate 12 is extended in the horizontal direction, and the mounting plate 12 is movably installed on the mounting seat body 11 in the up and down directions, wherein the electric drive assembly 3 is installed to the mounting plate 12.

[0052] In the above implementation, because the electric drive component 3 is installed to the mounting plate 12, the electric drive component 3 is installed on the mounting seat body 11 along the up and down directions along with the mounting plate 12, so that the driving gear 31 can move in the up and down directions to engage with the outside of the focusing gear ring 21 fixed on the focusing ring of different sizes, so as to ensure that the driving gear 31 is accurately engaged with the focusing gear ring 21.

[0053] Specifically, taking the extension direction of the axis of the driving gear 31 as the front-to-back direction, the mounting seat body 11 includes two support rods 111 both extending in the up-down direction, the two support rods 111 being arranged at intervals in the left-right direction, and the mounting plate 12 being spanned between the two support rods 111, and a penetration space being formed between the mounting plate 12 and the two support rods 111 below the mounting plate 12, by penetrating and installing the shooting camera 1000 in the penetration space and adopting a double-arm support method, when the mounting plate 12 moves downward, the driving gear 31 and the focusing gear ring 21 mounted on the focusing ring of the shooting camera 1000 are more stably engaged, thereby avoiding the driving gear 31 and the focusing gear ring 21 slipping due to the loose installation between the electric drive assembly 3 and the mounting seat body 11 during actual use, thereby affecting the focal distance adjustment and optical zoom effect of the focus adjuster 100.

[0054] There are many ways to achieve the vertical movement of the mounting plate 12 on the mounting seat body 11. Specifically, in this embodiment, the mounting seat 1 also includes two first sliding sleeves 13 respectively sleeved on the two support rods 111, and the outer side surface of each first sliding sleeve 13 is penetrated by a threaded hole. The left and right ends of the mounting plate 12 are respectively fixed on the two first sliding sleeves 13. By sliding the mounting plate 12 along the two support rods 111, the driving gear 31 installed on the mounting plate 12 can be moved in the vertical direction to engage with the outside of the focusing gear ring 21 sleeved and fixed on the focusing rings of different sizes, so as to ensure that the driving gear 31 is accurately meshed with the focusing gear rings 21 of different sizes. The focus adjuster 100 also includes two first adjustment locking rods 5, and the two first adjustment locking rods 5 are respectively threadedly installed in the threaded holes. When the mounting plate 12 slides to make the driving gear 31 and the focusing gear ring 21 accurately mesh, the first adjustment locking rod 5 is rotated so that the end surface of the first adjustment locking rod 5 is pressed against the outer side surface of the support rod 111, so that the mounting plate 12 is fixedly installed on the support rod 111, and the operation is simple.

[0055] See also Figure 1In this embodiment, the mounting seat body 11 also includes two mounting rods 112 extending in the front-to-back direction and arranged at intervals in the left-to-right direction, and two second sliding sleeves 113 respectively sleeved on the two mounting rods 112, and each of the second sliding sleeves 113 has a threaded hole on the outer side, and the lower ends of the two support rods 111 are respectively fixedly mounted on the two second sliding sleeves 113, and the two support rods 111 are slid along the two mounting rods 112 so that the driving gear 31 installed on the mounting plate 12 moves in the front-to-back direction to engage with the outside of the focusing gear ring 21 sleeved and fixed on the focusing rings of different sizes, so as to ensure that the driving gear 31 is accurately meshed with the focusing gear rings 21 of different sizes. The focus adjuster 100 also includes two second adjustment locking rods 6, and the two second adjustment locking rods 6 are respectively threadedly installed in the threaded holes, and the end faces of the second adjustment locking rods 6 are arranged to press against the outer side face of the mounting rod 112. When the support rod 111 slides to make the driving gear 31 and the focusing gear ring 21 precisely meshed, the second adjustment locking rod 6 is rotated so that the end face of the second adjustment locking rod 6 presses against the outer side face of the mounting rod 112, so that the support rod 111 is fixedly installed on the mounting rod 112, and the operation is simple.

[0056] In order to achieve accurate adjustment of the driving gear 31, the driving gear 31 is precisely meshed with the focusing gear ring 21. Figure 3 to Figure 4 In this embodiment, the electric drive assembly 3 is movably mounted on the mounting plate 12 in the up and down directions. By changing the distance between the electric drive assembly 3 and the mounting plate 12, the driving gear 31 is meshed with the focusing gear ring 21, which is easy to operate.

[0057] There are many ways to realize that the electric drive assembly 3 is movably mounted on the mounting plate 12 in the vertical direction. For example, the electric drive assembly 3 is movably mounted on the mounting plate 12 in the vertical direction by a cylinder, an oil cylinder, a ball screw, etc. This application does not limit this. Specifically, refer to Figure 2 The focuser 100 also includes a height adjustment component 7, which includes a bracket 71, an adjustment rod 72 and an elastic top-pressing component 73. The bracket 71 includes a horizontal plate 711 installed above the mounting plate 12 and extending horizontally. A placement space is formed between the horizontal plate 711 and the mounting plate 12 for placing the electric drive component 3. The adjustment rod 72 is movably inserted into the horizontal plate 711 along the up and down directions, and the lower end surface of the adjustment rod 72 abuts against the upper end surface of the electric drive component 3. The elastic top-pressing component 73 is arranged between the mounting plate 12 and the electric drive component 3 to elastically abut against the lower end surface of the electric drive component 3.

[0058] In the above implementation, the adjusting rod 72 is moved downward to push the electric drive assembly 3 to move downward, and the elastic top pressure assembly 73 is compressed to move downward, so that the electric drive assembly 3 moves downward toward the mounting plate 12, so that the drive gear 31 is precisely meshed with the small-sized focusing gear ring 21. When replacing a large-sized shooting camera 1000, the adjusting rod 72 is moved upward to compress the elastic top pressure assembly 73 to push the electric drive assembly 3 upward, so that the electric drive assembly 3 moves upward away from the mounting plate 12, so that the drive gear 31 is precisely meshed with the large-sized focusing gear ring 21, so that the focuser 100 can be suitable for shooting cameras 1000 of different sizes and is easy to operate.

[0059] The cam 72 is preferably used to unclog the cam 72 so that the cam 72 can be movably mounted on the horizontal plate 711 in the up-and-down direction.

[0060] Specifically, the elastic top pressure component 73 includes a positioning column 731, a spring 732 and a sleeve 733. The positioning column 731 is extended in the up and down directions. The lower end of the positioning column 731 is installed on the mounting plate 12. The lower end of the spring 732 is sleeved on the positioning column 731. The sleeve 733 is arranged at the upper end of the spring 732 and abuts against the lower end surface of the electric drive component 3 to support the electric drive component 3. When the adjusting rod 72 moves upward, the spring 732 stretches and pushes the electric drive component 3 to move upward. With this arrangement, the electric drive component 3 moves smoothly and the spring 732 can be replaced as needed.

[0061] It should be noted that, in other embodiments, the elastic pressing component 73 can also be a spring, one end of which is fixedly mounted on the mounting plate 12, and the other end of the spring abuts against the lower end surface of the electric drive component 3. Such an arrangement has a simple structure and saves costs.

[0062] In order to make the electric drive component 3 move more stably in the up and down directions, the bracket 71 also includes a bracket rod 712 extending in the up and down directions, and the height adjustment component 7 also includes a guide slider 74 movably installed with the bracket rod 712. The guide slider 74 is installed on the electric drive component 3, so that the electric drive component 3 moves more stably in the up and down directions.

[0063] Specifically, in this embodiment, two guide sliders 74 are provided, and one of the guide sliders 74 is installed on one side of the electric drive assembly 3. A groove matching the bracket rod 712 is formed on the side of the guide slider 74 away from the electric drive assembly 3. The groove is extended in the up-down direction. The bracket rod 712 is clamped in the groove so that the electric drive assembly 3 can slide in the up-down direction. The other guide slider 74 in this application is installed on the other side of the electric drive assembly 3. A boss extending in the up-down direction is convexly provided on the side of the guide slider 74 away from the electric drive assembly 3. The boss is against the side wall of the bracket rod 712, so that the electric drive assembly 3 can be slidably installed on the bracket rod 712.

[0064] It should be noted that the number and structure of the guide slider 74 can be set as needed. There can be only one guide slider 74, and one guide slider 74 can be movably clamped on the bracket rod 712 in the up and down directions to achieve a more stable up and down movement of the electric drive component 3. Such a setting has a simple structure and saves costs.

[0065] In order to facilitate the installation of the bracket 71 on the mounting plate 12, a guide structure 8 is provided between the bracket 71 and the mounting plate 12, and the guide structure 8 includes a guide groove 81 and a guide protrusion 82 matching the guide groove 81, and one of the guide groove 81 and the guide protrusion 82 is located on the bracket 71, and the other is located on the mounting plate 12. Through the guide structure 8, the bracket 71 and the mounting plate 12 are easy to install, and the driving gear 31 is easy to engage with the outside of the focusing gear ring 21.

[0066] Considering that in order to facilitate the disassembly and assembly of the height adjustment component 7, Figure 3 In this embodiment, it also includes a substrate a, the height adjustment component 7 is installed on the substrate a, the substrate a is detachably installed on the mounting plate 12, and moves up and down with the mounting plate 12, and a guide structure 8 is provided between the substrate a and the bracket 71 to facilitate the installation of the bracket 71.

[0067] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A focuser for remote focus distance adjustment and optical zoom of a camera, characterized in that: include: A mounting base, used for fixing and mounting a shooting camera; A focus adjustment component, comprising a focus gear ring, wherein the focus gear ring is used to be sleeved and fixed on the focus ring of the shooting camera; An electric drive assembly is disposed on the mounting seat, the electric drive assembly comprises a drive gear rotatably mounted on the mounting seat, the drive gear is meshed with the outer ring of the focusing gear; as well as, a circuit board assembly electrically connected to the electric drive assembly; The mounting base comprises: The mounting base body is used to fix the camera; and A mounting plate extending in the horizontal direction, wherein the mounting plate is movably mounted on the mounting seat body in the vertical direction; Wherein, the electric drive assembly is mounted to the mounting plate; The mounting seat body comprises two support rods extending in the vertical direction, and the two support rods are arranged at intervals in the left-right direction; The mounting plate is arranged between the two support rods, and a penetration space is formed between the mounting plate and the two support rods below the mounting plate for the camera to be penetrated and installed; The electric drive assembly is movably mounted on the mounting plate in the up-down direction; The focuser further comprises a height adjustment component, and the height adjustment component comprises: A bracket, comprising a horizontal plate installed above the mounting plate and extending in the horizontal direction, wherein a placement space is formed between the horizontal plate and the mounting plate for placing the electric drive assembly; an adjusting rod, movably inserted into the horizontal plate in the up-down direction, and the lower end surface of the adjusting rod abuts against the upper end surface of the electric drive assembly; and The elastic pressing component is arranged between the mounting plate and the electric drive component, and is used for elastically abutting against the lower end surface of the electric drive component.

2. The focuser according to claim 1, characterized in that: The mounting seat further comprises two first sliding sleeves respectively sleeved on the two support rods, and a threaded hole is penetrated on the outer side surface of each of the first sliding sleeves; The left and right ends of the mounting plate are respectively fixed on the two first sliding sleeves; The focuser also includes two first adjustment locking rods, which are respectively threadedly installed in the threaded holes, and the end faces of the first adjustment locking rods are arranged to press against the outer side faces of the support rods so that the mounting plate is fixedly installed on the support rods.

3. The focuser according to claim 1, characterized in that: The upper end surface of the horizontal plate is provided with a mounting hole, and the inner wall surface of the mounting hole is provided with an internal thread; The outer side surface of the adjusting rod is provided with an external thread matched with the internal thread, and the adjusting rod is installed in the installation hole corresponding to the thread.

4. The focuser according to claim 1, characterized in that: The elastic top pressure component comprises: A positioning column is extended in the up-down direction, and the lower end of the positioning column is mounted on the mounting plate; a spring, the lower end of which is sleeved on the positioning post; and The sleeve is arranged at the upper end of the spring and abuts against the lower end surface of the electric drive assembly.

5. The focuser according to claim 1, characterized in that: The bracket also includes a bracket rod extending in the up-down direction; The height adjustment assembly also includes a guide slider movably mounted on the support rod, and the guide slider is mounted on the electric drive assembly.

6. The focuser according to claim 1, characterized in that: A guide structure is arranged between the bracket and the mounting plate, and the guide structure comprises a guide groove and a guide protrusion matched with the guide groove. One of the guide groove and the guide protrusion is located at the bracket, and the other is located at the mounting plate.

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