Lock Structure of the Bowens Mount
The locking structure for the Bowens mount, incorporating a rotating member and concave grooves, addresses the issue of loose attachment and inaccurate alignment of heavier optical components, providing secure and precise mounting.
Patent Information
- Application Number
- JP2024600214U
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2022-08-31
- Publication Date
- 2025-06-23
- Estimated Expiration
- 2032-08-31
AI Technical Summary
The conventional mount structure of lighting fixtures with a Bowens mount is inadequate for securely fixing heavier and more complex optical components, leading to loose attachment and inaccurate optical alignment.
A locking structure for the Bowens mount is introduced, featuring a rotating member and a mount on the lamp front housing with three concave grooves that engage with the protrusions of the Bowens mount, along with a rotating handle for operation.
The locking structure effectively limits the movement of the Bowens mount in both the circumferential and vertical directions, ensuring secure attachment of heavier optical components and maintaining accurate optical alignment.
Smart Images
Figure 0003251722000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of optical devices, and particularly to a locking structure of a Bowens mount.
Background Art
[0002] The Bowens mount is a standard mechanical interface commonly used in film and television lighting fixtures. It is used to attach various optical components for adjusting the light emission angle, including, but not limited to, a reflector cup, a spherical diffuser, an umbrella diffuser, a condenser lens, and an imaging lens. Film and television lighting fixtures are generally composed of two parts. As the first part, there is a light source part for generating a beam, that is, the lighting fixture part. As the second part, there are optical components attached to the lighting fixture, which correct the angle and direction of the beam. For example, the reflector cup restricts a large-angle beam to a small angle to increase the central intensity of the spot, and the softbox performs diffuse reflection on the beam to uniformly irradiate the irradiated object with the beam. The Bowens mount is a mechanical interface commonly used on the optical component side. In order to accommodate an optical component having a Bowens mount, the lighting fixture mount generally uses a normal mount structure and locks the optical component to the lighting fixture by engaging the Bowens mount with a buckle structure.
[0003] The conventional mount structure of a lighting fixture that also serves as a Bowens mount is designed for relatively simple and lightweight optical components and can only fix the optical components quite loosely.
Summary of the Invention
Problems to be Solved by the Invention
[0004] An object of the present invention is to solve the technical problem that in the prior art, the mount structure of a lighting fixture that also serves as a Bowens mount can only fix the optical components quite loosely, by providing a locking structure for the Bowens mount.
Means for Solving the Problems
[0005] To solve the above technical problems, the present invention adopts the following technical solutions: The present application provides a locking structure for a Bowens mount used to lock a lamp and an optical component having a Bowens mount, including a rotating member and a mount provided on a lamp front housing, wherein the mount is provided on a circumferential side of a light exit of the lamp front housing, the rotating member is screwed to the mount, the mount includes three concave grooves that engage with a protrusion of the Bowens mount, a height of the concave grooves is lower than a height of the protrusion of the Bowens mount, and the rotating member includes notch portions corresponding to at least the three concave grooves.
[0006] Preferably, the mount includes an inner ring, an outer ring provided coaxially with and parallel to the light exit, and a connecting portion connecting the inner ring and the outer ring, the inner ring approaches the light exit, the outer ring is away from the light exit, and the connecting portion is vertically connected to an inner end of the outer ring and an outer end of the inner ring respectively.
[0007] Preferably, a female screw is provided on a side of the outer ring facing the light exit of the lamp front housing, and the concave grooves are provided on the connecting portion.
[0008] Preferably, the rotating member includes an annular rotating body, a male screw engaging with the female screw is provided on an outer circumference of the rotating body, and the notch portions are provided on an inner circumference of the rotating member.
[0009] Preferably, a rotating handle for operating the rotating member to rotate is provided on the rotating member.
[0010] Preferably, there are two rotating handles, which are respectively provided on the rotating member in a corresponding manner.
[0011] Preferably, it further includes a position-limiting and fixing starting point provided on the front housing and located on the circumferential side of the mount, and a position-limiting and fixing ending point. The rotating handle is provided between the position-limiting and fixing starting point and the position-limiting and fixing ending point. Thereby, the position-limiting and fixing starting point and the position-limiting and fixing ending point limit the moving distance of the rotating handle, and further limit the displacement generated from the rotating member in the vertical direction.
[0012] Preferably, the position-limiting and fixing starting point is provided to correspond to one of the concave grooves, and the rotating handle is provided to correspond to one of the notch portions.
[0013] Preferably, the distance between the position-limiting and fixing starting point and the position-limiting and fixing ending point is set based on the protrusions of different heights that can be pressed by the displacement of the rotating member in the vertical direction.
Advantages of the Invention
[0014] As can be seen from the above technical solutions, the present invention has at least the following advantages and excellent effects: This application is used to lock a lamp and an optical component having a Bowens mount, and provides a locking structure for a Bowens mount including a rotating member and a mount provided on a lamp front housing. The mount is provided on the circumferential side of the light outlet of the lamp front housing. The rotating member is screwed to the mount. The mount includes three concave grooves that engage with the protrusions of the Bowens mount. The height of the concave grooves is lower than the height of the protrusions of the Bowens mount. The rotating member includes at least three notch portions corresponding to the concave grooves. Through the notch portions of the rotating member, the protrusions of the Bowens mount enter into the concave grooves of the mount. The concave grooves limit the position in the circumferential direction of the protrusions. Due to the screw engagement between the rotating member and the mount, the notch portions and the concave grooves are displaced, pressing the protrusions, and realizing the position limitation of the protrusions in the vertical direction.
Brief Description of the Drawings
[0015]
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Embodiments for Carrying out the Invention
[0016] Typical embodiments embodying the features and advantages of the present invention are described in detail in the following description. Here, the present invention has various modifications in different embodiments, none of which deviate from the scope of the present invention, and the descriptions and illustrations therein do not limit the present invention. Essentially, they are for illustrative purposes.
[0017] Before explaining this application, the Boehm mount 10 is introduced. FIG. 1 is a structural schematic diagram of a conventional Boehm mount 10. As shown in FIG. 1, the Boehm mount 10 is a mechanical interface commonly used on the optical component 100 side and includes a ring having three protrusions 11 made of a metal material. As shown in FIG. 2, in order to accommodate the optical component 100 having the Boehm mount 10, the film and television lighting fixture 200 generally uses a normal mount 32 structure. The mount 32 structure includes three channels 20 that engage with the three protrusions 11 of the Boehm mount 10. The three channels 20 are concentric arc-shaped grooves 324. After the protrusions 11 of the Boehm mount 10 are respectively inserted so as to correspond to the notches of the respective channels 20, the other part of the channels 20 is covered by the front housing of the film and television lighting fixture 200. Therefore, when the Boehm mount 10 is rotated, the protrusions 11 rotate along the channels 20 to the part of the channels 20 covered by the front housing of the film and television lighting fixture 200 and are limited by the front housing of the film and television lighting fixture 200. As shown in FIG. 4, a spring clip 21 for preventing the protrusions 11 from continuously rotating is provided in the channels 20. Thereby, the locking of the Boehm mount 10 is realized, the optical component 100 is locked to the film and television lighting fixture 200, and by pressing a plug for controlling the spring clip 21, the spring clip 21 contracts and rotates in the reverse direction, and the optical component 100 can be removed.
[0018] The conventional fixation of the optical component 100 by the engagement of the channel 20, the spring clip 21, and the front housing can only achieve the fixation of the optical component 100 that is light in weight and does not have a complex optical architecture. When fixing a larger, heavier, and more complex optical component 100, the conventional solution of locking the Böhm mount 10 does not have sufficient accuracy for accurate optical alignment, and the strength of the spring clip 21 is also too weak to sufficiently lock the heavy optical component 100 including large glass and metal parts. In the rotational direction, the optical component 100 still has a large amount of movement space. As shown in FIG. 3, since the sizes of the Böhm mounts 10 manufactured by each manufacturer of the optical component 100 are different, the heights of the three protrusions 11 are uneven, and since the metal protrusion structure is too high, in order to avoid the inability to attach the optical component 100, the manufacturer of the luminaire 200 can only make the height of the channel 20 of the concave groove 324 on the luminaire 200 side as high as possible. As a result, in the vertical direction, most of the optical components 100 still have movement space.
[0019] Referring to FIGS. 5 and 6, the present application provides a locking structure for the Böhm mount 10, which can remove the rotational clearance between the Böhm mount 10 attached to the optical component 100 and the mount 32 of the luminaire 200, and also remove the clearance between the Böhm mount 10 (140) and the mount 32 of the luminaire 200 in the vertical direction. The Böhm mount 10 includes a rotating member 40 and a mount 32 provided on the luminaire front housing 30.
[0020] For ease of explanation and understanding, hereinafter, the axial direction of the light exit 31 of the luminaire front housing 30 in FIG. 5 is defined as the vertical direction, and the inside and outside of the luminaire front housing 30 are defined as the inner direction and the outer direction.
[0021] The lamp front housing 30 is provided with a light outlet 31 for allowing the light rays of the lamp 200 to pass through, and the mount 32 is provided on the circumferential side of the light outlet 31. The mount 32 is an annular stepped groove, and includes an inner ring 323 approaching the light outlet 31, an outer ring 321 away from the light outlet 31, and a connecting portion 322 connecting between the outer ring 321 and the inner ring 323.
[0022] The inner ring 323 and the outer ring 321 are provided coaxially with the light outlet 31 and are parallel, and the connecting portion 322 is vertically connected to the inner end of the outer ring 321 and the outer end of the inner ring 323 respectively. Specifically, the lamp front housing 30 extends vertically inward to form the outer ring 321, then extends vertically to the light outlet 31 to form the connecting portion 322, and on the circumferential side approaching the light outlet 31, continues to extend vertically inward to form the inner ring 323. In this way, the mount 32 has the shape of a stepped groove. A female thread 325 is provided on the side of the outer ring 321 facing the light outlet 31, and a concave groove 324 engaging with the three protrusions 11 of the Börns mount 10 is provided on the connecting portion 322. The size of the concave groove 324 can limit the movement of the protrusion 11 in the circumferential direction of the mount 32, and the height of the concave groove 324 is lower than the height of the protrusion 11.
[0023] The rotating member 40 is an annular ring provided coaxially with the mount 32, and the Börns mount 10 of the optical component 100 can pass through the center thereof. A male thread 41 is provided on the outer circumference of the rotating member 40, and a notch portion 42 is provided on the inner circumference thereof. The rotating member 40 is engaged with the female thread 325 of the outer ring 321 of the mount 32 by the male thread 41 to realize screwing between the rotating member 40 and the mount 32. Specifically, in this embodiment, there are three notch portions 42, and the three notch portions 42 respectively correspond to the three concave grooves 324 one by one. In other embodiments, the number of the notch portions 42 may be more than three, as long as there are at least three corresponding to the three concave grooves 324 one by one.
[0024] When in use, first, screw the rotating member 40 into the mount 32 until the notch 42 is aligned with the concave groove 324. Then, pass the Börns mount 10 of the optical component 100 through the center of the rotating member 40. Through the notch 42, the three protrusions 11 respectively enter into the concave groove 324. Further, the circumferential movement of the protrusion 11 is restricted by the concave groove 324. In this case, rotate the rotating member 40. The notch on the rotating member 40 and the concave groove 324 are misaligned and continuously tightened to be screwed together. Since the height of the protrusion 11 is higher than that of the concave groove 324, rotate the rotating member 40 to the surface of the protrusion 11 to press the protrusion 11, and further remove the gap between the rotating member 40 and the protrusion 11. In this way, the movement of the Börns mount 10 in the circumferential direction and the vertical direction is respectively limited by the concave groove 324 and the rotating member 40 to ensure the reliability of the installation.
[0025] Furthermore, the rotating member 40 is provided with a rotation handle 43 for operating the rotation of the rotating member 40. The rotation handle 43 may be fixed to the outer periphery of the rotating member 40 or may be connected to be attachable to the outer periphery of the rotating member 40. Specifically, two handles of the rotating member 40 are provided so as to correspond to each other. Here, the number of the rotating members 40 may be installed according to needs.
[0026] Furthermore, the locking structure is provided on the lamp front housing 30 and further includes a position - limiting fixed starting point 50 and a position - limiting fixed ending point 60 located on the outer periphery of the mount 32. The rotation handle 43 is provided between the position - limiting fixed starting point 50 and the position - limiting fixed ending point 60. Thereby, the position - limiting fixed starting point 50 and the position - limiting fixed ending point 60 limit the moving distance of the rotation handle 43 and further limit the displacement generated from the rotating member 40 in the vertical direction.
[0027] Specifically, the position limit fixing starting point 50 is provided to correspond to one concave groove 324, and the rotation handle 43 is provided to correspond to one of the notches 42. The distance between the position limit fixing starting point 50 and the position limit fixing end point 60 is set based on the protrusions 11 of different heights that can be displaced by the rotation member 40 in the vertical direction. During use, the rotation handle 43 is rotated clockwise to lock the lighting fixture 200 and the optical component 100 having the Bowens mount 10, and the rotation handle 43 is rotated counterclockwise to rotate the rotation handle 43 and the corresponding notch 42 to the positions of the position limit fixing starting point 50 and the corresponding concave groove 324 until the notch 42 and the concave groove 324 overlap. Then, the rotation handle 43 is continuously rotated counterclockwise to move the rotation member 40 in the reverse direction to release the lock.
[0028] This application is used to lock the lighting fixture 200 and the optical component 100 having the Bowens mount 10, and provides a locking structure for the Bowens mount 10 including the rotating member 40 and the mount 32 provided on the front housing 30 of the lighting fixture. The mount 32 includes three concave grooves 324 engaging with the protrusion 11 of the Bowens mount 10 and an internal thread 325 opened in the mount 32. The height of the concave groove 324 is lower than that of the protrusion 11 of the Bowens mount 10. The rotating member 40 includes a rotating member body, a notch 42 provided on the rotating member body corresponding to at least three concave grooves 324, and an external thread 41 opened on the outer periphery of the rotating body. The mount 32 is screwed to the rotating member 40 by the internal thread 325 and the external thread 41. Through the notch 42 of the rotating member 40, the protrusion 11 of the Bowens mount 10 enters into the concave groove 324 of the mount 32, and the concave groove 324 performs position limitation on the circumferential direction of the protrusion 11. Due to the screw engagement between the rotating member 40 and the mount 32, the notch 42 and the concave groove 324 are displaced in position to press the protrusion 11, thereby realizing the position limitation of the protrusion 11 in the vertical direction. The locking structure provided by this application eliminates any looseness at the connection point between the lighting fixture 200 and the Bowens mount 10 of the optical component 100. It allows the attachment of a heavier optical component by a lighting fixture for movies and TVs without falling off, while ensuring the accurate butting of the optical component, for example, a complex lens unit and the lighting fixture light source, and further ensuring the optical quality.
[0029] The present invention has been described with reference to several typical embodiments. Here, the terms used are not limiting terms but illustrative terms in the description. Since the present invention can be specifically implemented in many forms without departing from the spirit and essence of the present invention, the above embodiments are not limited to any of the above details, but are broadly interpreted within the spirit and scope defined by its claims. Therefore, all changes and improvements belonging to the claims or their equivalent scope should fall within the scope of the claims.
Description of Reference Numerals
[0030] 10 Bowens mount, 11 Protrusion, 20 channels, 21 spring clips, 30 lamp front housing, 31 light outlet, 32 mount, 321 outer ring, 322 connection part, 323 inner ring, 324 concave groove, 325 female thread, 40 rotating member, 41 male thread, 42 notch, 43 rotating handle, 50 position limit fixed starting point, 60 position limit fixed ending point, 100 optical component, 200 lamp
Claims
1. A locking structure for a Bowens mount used to lock a lamp and an optical component having a Bowens mount, including a rotating member and a mount provided on a lamp front housing, the mount being provided on a circumferential side of a light exit of the lamp front housing, the rotating member being screwed to the mount, the mount including three concave grooves that engage with a protrusion of the Bowens mount, a height of the concave grooves being lower than a height of the protrusion of the Bowens mount, and the rotating member including notch portions corresponding to at least three of the concave grooves.
2. The mount according to claim 1, wherein the mount includes an inner ring, an outer ring provided coaxially with and parallel to the light exit, and a connecting portion connecting the inner ring and the outer ring, the inner ring approaching the light exit, the outer ring being away from the light exit, and the connecting portion being perpendicularly connected to an inner end of the outer ring and an outer end of the inner ring, respectively.
3. The locking structure according to claim 2, wherein a female screw is provided on a side of the outer ring facing the light exit of the lamp front housing, and the concave grooves are provided in the connecting portion.
4. The locking structure according to claim 3, wherein the rotating member includes an annular rotating body, a male screw engaging with the female screw is provided on an outer circumference of the rotating body, and the notch portions are provided on an inner circumference of the rotating member.
5. The locking structure according to claim 4, wherein a rotating handle for operating the rotating member to rotate is provided on the rotating member.
6. The locking structure according to claim 5, wherein there are two rotating handles, and the rotating handles are provided on the rotating member in a corresponding manner.
7. It is further provided with a position - limiting and fixing starting point provided on the front housing and located on the peripheral side of the mount, and a position - limiting and fixing end point, and the rotation handle is provided between the position - limiting and fixing starting point and the position - limiting and fixing end point. Thus, the position - limiting and fixing starting point and the position - limiting and fixing end point limit the moving distance of the rotation handle, and further limit the displacement generated from the rotating member in the vertical direction. The lock structure according to claim 5, characterized in that.
8. The position - limiting and fixing starting point is provided corresponding to one of the concave grooves, and the rotation handle is provided corresponding to one of the notch portions. The lock structure according to claim 7, characterized in that.
9. The distance between the position - limiting and fixing starting point and the position - limiting and fixing end point is set based on the protrusions of different heights that can be pressed by the displacement of the rotating member in the vertical direction. The lock structure according to claim 8, characterized in that.