Mechanical iris device and beam stopper

Abstract

The application relates to the technical field of mechanical iris, in particular to a mechanical iris device and a beam limiter. The mechanical iris device comprises a mounting bottom plate provided with a guide groove; a rotating disc oppositely arranged with the mounting bottom plate and capable of rotating around its own axis; the rotating disc is provided with an open groove, the open groove is an arc-shaped groove, and the bending direction of the arc-shaped groove is away from the projection of the guide groove on the rotating disc; iris blades are provided with upper movement columns and lower movement columns on opposite sides; the upper movement columns are slidably embedded in the open groove, and the lower movement columns are slidably embedded in the guide groove. Through the cooperation of the arc-shaped open groove and the guide groove, the mechanical iris device can effectively reduce the included angle between the movement direction of the iris blades and the pressure direction, so that the output torque required for driving the iris blades to move can be reduced, and the transmission efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of mechanical iris technology, and more specifically, to a mechanical iris device and a iris limiter. Background Technology

[0002] In fields such as precision optics, medical devices, and industrial automation, mechanical iris devices (i.e., variable aperture diaphragms) are key components for achieving precise light control. Their core function lies in achieving continuous and smooth scaling of the central light-transmitting aperture through the synchronous radial movement of multiple iris blades.

[0003] However, in practical applications, as the iris blades open and the opening becomes larger, the required motor output force also increases, resulting in increasingly lower transmission efficiency. Utility Model Content

[0004] In view of this, this application aims to provide a mechanical iris recognition device and a beam limiter, which can solve the problems of increased motor output force and decreased transmission efficiency in mechanical iris recognition devices of the related art as the opening increases.

[0005] To achieve the above objectives, the first aspect of this application provides a mechanical iris recognition device.

[0006] A second aspect of this application provides a bundle limiter.

[0007] According to a first aspect of this application, a mechanical iris recognition device is provided, comprising: a mounting base plate having a guide groove; a rotating disk having an opening groove opposite to the mounting base plate and being rotatable about its own axis; the rotating disk having an opening groove having an arc-shaped groove, and the curvature direction of the arc-shaped groove being opposite to the projection of the guide groove on the rotating disk; an iris blade having an upper moving post and a lower moving post respectively provided on opposite sides; the upper moving post being slidably fitted into the opening groove, and the lower moving post being slidably fitted into the guide groove.

[0008] In the above technical solution, the combination of the arc-shaped opening groove and the guide groove can effectively reduce the angle between the direction of movement of the iris blade and the direction of pressure, thereby reducing the output torque required to drive the movement of the iris blade and improving the transmission efficiency.

[0009] In some technical solutions, optionally, the mounting base plate is provided with at least four guide grooves; the rotating disk is provided with at least four opening grooves, which correspond one-to-one with the at least four guide grooves, and are respectively connected to at least four iris blades.

[0010] In the above technical solution, the rotating disk only needs to rotate a small angle, and at least four iris blades can simultaneously expand outward or contract inward to achieve opening and closing, thereby helping to reduce response time.

[0011] In some technical solutions, optionally, at least four guide slots are arranged in a centrally symmetrical manner.

[0012] In the above technical solution, the force direction of each blade is evenly distributed, which can ensure the synchronicity of movement between iris blades and avoid stress concentration, thereby achieving rapid response.

[0013] In some technical solutions, the iris blade may optionally have at least two lower motion columns.

[0014] In the above technical solution, at least two points at the bottom of the iris blade are constrained within the guide groove, which can effectively suppress the swaying of the iris blade and enable the iris blade to maintain a stable movement state.

[0015] In some technical solutions, the mechanical iris recognition device may optionally include a drive assembly; the drive assembly is mounted on a mounting base plate and connected to a rotating disk to drive the rotating disk to rotate.

[0016] In the above technical solution, the rotating disk is driven by the drive component, so that the mechanical iris device can automatically adjust the opening and closing of the iris blades according to the preset program or the received external control signal, thereby improving the convenience and efficiency of operation.

[0017] In some technical solutions, the mechanical iris recognition device may optionally include a transmission assembly; the transmission assembly is disposed between the drive assembly and the rotating disk.

[0018] In the above technical solution, the power output from the drive component is transmitted to the rotating disk through the transmission component. On the one hand, this can optimize the overall layout, improve space utilization and ease of operation; on the other hand, the transmission component can play a role in buffering and shock absorption.

[0019] In some technical solutions, the outer edge of the rotating disk is optionally provided with teeth, wherein the transmission component includes gears; the gears are connected to the drive component and mesh with the teeth.

[0020] In the above technical solution, the rotation speed and rotation angle of the rotating disk can be precisely controlled by designing the number of teeth and the module of the gear, thereby ensuring that the iris blades in the mechanical iris device can open and close accurately to meet the needs of different scenarios.

[0021] In some technical solutions, the mechanical iris device may optionally include a cover plate; the cover plate is connected to the mounting base plate and together with the mounting base plate forms a receiving space, in which the rotating disk and iris blades are housed.

[0022] In the above technical solution, the cover plate and the mounting base plate together form a relatively enclosed receiving space. The rotating disk and iris blades are set within this receiving space, thereby avoiding interference and damage from external environmental factors (such as dust, moisture, collisions, etc.), and thus extending the service life of the mechanical iris device.

[0023] In some technical solutions, the cover plate and mounting base plate can optionally be detachably connected. This allows for the inspection and maintenance of internal components such as the rotating disc and iris blades by removing the cover plate.

[0024] According to a second aspect of this application, a beam limiter is provided, comprising the mechanical iris device provided by any of the above-described technical solutions. Thus, the beam limiter possesses all the beneficial effects of any of the above-described technical solutions, which will not be elaborated further here.

[0025] Additional aspects and advantages of the technical solutions of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a mechanical iris recognition device in related technologies;

[0027] Figure 2 This is an exploded structural diagram of a mechanical iris recognition device according to some embodiments of this application;

[0028] Figure 3 These are schematic diagrams of the structure of the iris blades according to some embodiments of this application;

[0029] Figure 4 This is one of the structural schematic diagrams of the mechanical iris recognition device according to some embodiments of this application;

[0030] Figure 5 This is a second schematic diagram of the mechanical iris recognition device according to some embodiments of this application.

[0031] Figure label:

[0032] 110 Mounting base plate; 111 Guide groove; 120 Rotating disk; 121 Opening groove; 122 Tooth; 130 Iris blade; 131 Upper moving column; 132 Lower moving column; 140 Drive assembly; 150 Transmission assembly; 151 Gear; 160 Cover plate. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0034] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0035] Reference Figure 1 Currently, mechanical iris recognition devices typically employ a classic structure of "rotating disk drive and linear slot guide." This means a rotating disk drives the upper moving column of the blades via a linear sliding slot, while the lower moving column of the blades is confined within a linear guide slot on the mounting base. The rotational motion of the rotating disk is converted into the radial linear motion of the blades through this slot-column connection, thus achieving opening and closing.

[0036] However, in this structure, there is an angle between the direction of movement B' of the iris blades and the direction of pressure A' applied to the iris blades by the transmission gear through the linear sliding groove. As the mechanical iris device operates, this angle increases as the opening of the iris blades gradually increases.

[0037] The motor needs to overcome the component of the force in the direction of the pressure to drive the iris blades. Due to the included angle, the pressure will generate a component force in the non-moving direction. This means that the motor must not only overcome the actual resistance to the blade movement but also the additional force generated by the included angle. As the included angle increases, the force required by the motor also increases accordingly. This not only increases the load on the motor, requiring it to have a higher output capacity, increasing the cost and energy consumption of the equipment, but also leads to a decrease in transmission efficiency.

[0038] In view of this, embodiments of this application provide a mechanical iris recognition device that can effectively reduce the output torque of the motor and improve transmission efficiency.

[0039] It is understood that the mechanical iris device provided in this application embodiment can be used for optical lenses or beam limiters, etc. Optical lenses include, but are not limited to, machine lenses, microscopes, and endoscopes. Beam limiters include, but are not limited to, CT (Computed Tomography) scanners, X-ray machines, and spectrometers, etc.

[0040] The following is combined with Figures 2 to 5The mechanical iris device and beam limiter provided in this application will be described in detail through specific embodiments and application scenarios.

[0041] Reference Figure 2 and Figure 3 This application provides a mechanical iris device, the structure of which includes: a mounting base plate 110, a rotating disk 120 and an iris blade 130.

[0042] The mounting base plate 110 is provided with a guide groove 111. The rotating disk 120 is arranged opposite to the mounting base plate 110 and can rotate around its own axis. The rotating disk 120 is provided with an opening groove 121, which is an arc-shaped groove, and the curvature of the arc-shaped groove is opposite to the projection of the guide groove 111 on the rotating disk 120. The iris blade 130 is provided with an upper moving column 131 and a lower moving column 132 on opposite sides; the upper moving column 131 is slidably fitted into the opening groove 121, and the lower moving column 132 is slidably fitted into the guide groove 111.

[0043] Reference Figure 2 , Figure 4 and Figure 5 Specifically, the upper moving column 131 of the iris blade 130 is fitted into the opening groove 121 of the rotating disk 120, and the lower moving column 132 is fitted into the guide groove 111 of the mounting base plate 110. When the rotating disk 120 rotates axially, the force exerted by the rotating disk 120 on the upper moving column 131 through the opening groove 121 is transmitted to the lower moving column 132, pushing the iris blade 130 as a whole to translate along the guide groove 111, thereby changing the size of the iris opening. At the same time, due to the arc-shaped design of the opening groove 121, the direction A (pressure direction) of the force exerted by the rotating disk 120 on the upper moving column 131 through the groove wall of the opening groove 121 changes dynamically with the rotation angle, and always tends to be consistent with the movement direction B of the iris blade 130. This means that the component force of the iris blade 130 in the non-movement direction is small or almost non-existent. Therefore, during driving, only the actual resistance of the movement of the iris blade 130 needs to be overcome, without the need to consume additional energy to overcome the component force in the non-movement direction, and the output torque is significantly reduced. This improves transmission efficiency and can even keep it nearly constant throughout the entire stroke.

[0044] Compared to the "straight sliding groove-straight guide groove" structure in related technologies, the mechanical iris device provided in this embodiment can effectively reduce the angle between the movement direction and the pressure direction of the iris blade 130 through the cooperation of the arc-shaped opening groove 121 and the guide groove 111, thereby reducing the output torque required to drive the iris blade 130 to move and improving the transmission efficiency.

[0045] Reference Figure 2 , Figure 4 and Figure 5In practical applications, the mounting base plate 110 is provided with at least four guide grooves 111, and the rotating disk 120 is provided with at least four opening grooves 121, which correspond one-to-one with the at least four guide grooves 111, and are respectively connected to at least four iris blades 130.

[0046] In the above embodiment, the mounting base plate 110 is provided with four guide grooves 111, and the rotating disk 120 is provided with four corresponding opening grooves 121, which are respectively connected to four iris blades 130, forming four independent parallel motion units. When the rotating disk 120 rotates, the four opening grooves 121 synchronously drive the four upper motion columns 131, which in turn transmit the signal to the lower motion column 132 through the iris blade 130 structure, pushing the four iris blades 130 to synchronously translate along their respective guide grooves 111. In this way, the rotating disk 120 only needs to rotate a small angle for the four iris blades 130 to simultaneously expand outward or contract inward, realizing opening and closing, thereby helping to reduce the response time.

[0047] Understandably, the number of iris blades 130 can also be two, three, or five, etc. Correspondingly, the number of guide slots 111 and opening slots 121 corresponds to the number of iris blades 130.

[0048] In some embodiments, at least four guide slots 111 are arranged in a centrally symmetrical manner. This ensures that the force direction of each iris blade 130 is evenly distributed, thereby ensuring the synchronicity of movement between the iris blades 130 and avoiding stress concentration, thus achieving rapid response.

[0049] In some embodiments, the iris blade 130 is provided with at least two lower motion posts 132. In other words, at least two points on the bottom of the iris blade 130 are constrained within the guide groove 111, thereby supporting the iris blade 130 in different directions, allowing the iris blade 130 to slide only along the guide groove 111. Compared to single-point constraints, which are prone to rotation or oscillation around the constraint point, multi-point constraints can effectively suppress the wobbling of the iris blade 130, enabling the iris blade 130 to maintain a stable motion state.

[0050] In some embodiments, the mechanical iris device further includes a drive assembly 140; the drive assembly 140 is disposed on the mounting base plate 110 and connected to the rotating disk 120 to drive the rotating disk 120 to rotate.

[0051] In the above embodiments, the mechanical iris device further includes a drive assembly 140. By driving the rotating disk 120 to rotate through the drive assembly 140, the mechanical iris device can automatically adjust the opening and closing of the iris blades 130 according to a preset program or received external control signals, thereby improving the convenience and efficiency of operation.

[0052] It is understandable that the drive component 140 can be a stepper motor or a servo motor, etc.

[0053] In practical applications, the mechanical iris recognition device also includes a transmission assembly 150; the transmission assembly 150 is disposed between the drive assembly 140 and the rotating disk 120.

[0054] The power output from the drive assembly 140 is transmitted to the rotating disk 120 via the transmission assembly 150. Compared to the drive assembly 140 directly driving the rotating disk 120, the transmission assembly 150 can change the power transmission direction of the drive assembly 140 according to actual needs, achieving multi-angle transmission. This optimizes the overall layout, improves space utilization, and enhances operational convenience. Simultaneously, the drive assembly 140 inevitably generates vibrations and impacts during operation. If direct transmission were used, these vibrations and impacts would be directly transmitted to the rotating disk 120, affecting its operational accuracy and stability. The transmission assembly 150, however, can buffer and dampen these vibrations.

[0055] In some embodiments, the outer edge of the rotating disk 120 is provided with teeth 122. The transmission assembly 150 includes a gear 151. The gear 151 is connected to the drive assembly 140 and meshes with the teeth 122.

[0056] When the drive assembly 140 operates, it drives the gear 151 to rotate. The teeth of the gear 151 mesh with the teeth 122 of the rotating disk 120, transmitting rotational power to the rotating disk 120, causing the rotating disk 120 to rotate in a predetermined direction and speed. It is understood that the gear 151 transmission can achieve a precise transmission ratio. Therefore, by designing the number of teeth and module of the gear 151, the rotational speed and rotation angle of the rotating disk 120 can be precisely controlled, thereby ensuring that the iris blades 130 in the mechanical iris device can open and close accurately to meet the needs of different scenarios.

[0057] It is understandable that the transmission component 150 can also be a chain drive, belt drive, worm gear, etc.

[0058] In some embodiments, the mechanical iris device further includes a cover plate 160. The cover plate 160 is connected to the mounting base plate 110 and together with the mounting base plate 110 forms a receiving space, in which the rotating disk 120 and the iris blade 130 are housed.

[0059] In the above embodiment, the cover plate 160 and the mounting base plate 110 together form a relatively enclosed receiving space. The rotating disk 120 and the iris blade 130 are disposed within this receiving space, thereby avoiding interference and damage from external environmental factors (such as dust, moisture, collisions, etc.) and thus extending the service life of the mechanical iris device.

[0060] In practical applications, the cover plate 160 and the mounting base plate 110 are detachably connected. This allows for the inspection and maintenance of internal components such as the rotating disk 120 and iris blades 130 by removing the cover plate 160.

[0061] It is understandable that the cover plate 160 and the mounting base plate 110 can be connected by bolts or snap-fit ​​connections.

[0062] In some embodiments, this application also provides a beam limiter, including the mechanical iris device provided in any of the above embodiments. Thus, the beam limiter possesses all the beneficial effects of any of the above embodiments, which will not be elaborated further here.

[0063] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0064] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Many other forms can be made without departing from the spirit and scope of the claims of this application, and all of them are within the protection scope of this application.

Claims

1. A mechanical iris device, characterized by, include: The mounting base plate is equipped with guide grooves; A rotating disk is arranged opposite to the mounting base plate and can rotate around its own axis; the rotating disk is provided with an opening groove, the opening groove is an arc-shaped groove, and the bending direction of the arc-shaped groove is away from the projection of the guide groove on the rotating disk; An iris blade has an upper moving post and a lower moving post on opposite sides; the upper moving post is slidably fitted into the opening groove, and the lower moving post is slidably fitted into the guide groove.

2. The mechanical iris device of claim 1, wherein, The mounting base plate is provided with at least four guide grooves; the rotating disk is provided with at least four opening grooves, which correspond one-to-one with the at least four guide grooves, and are respectively connected to at least four iris blades.

3. The mechanical iris recognition device according to claim 2, characterized in that, At least four of the guide slots are arranged in a centrally symmetrical manner.

4. The mechanical iris recognition device according to claim 1, characterized in that, The iris blade is provided with at least two downward moving columns.

5. The mechanical iris recognition device according to claim 1, characterized in that, The mechanical iris recognition device also includes a drive assembly; the drive assembly is disposed on the mounting base plate and connected to the rotating disk to drive the rotating disk to rotate.

6. The mechanical iris recognition device according to claim 5, characterized in that, The mechanical iris recognition device further includes a transmission component; the transmission component is disposed between the drive component and the rotating disk.

7. The mechanical iris recognition device according to claim 6, characterized in that, The outer edge of the rotating disk is provided with teeth, wherein the transmission component includes a gear; the gear is connected to the drive component and meshes with the teeth.

8. The mechanical iris device according to any one of claims 1 to 7, characterized in that, The mechanical iris device also includes a cover plate; the cover plate is connected to the mounting base plate and together with the mounting base plate forms an accommodating space, in which the rotating disk and the iris blade are housed.

9. The mechanical iris recognition device according to claim 8, characterized in that, The cover plate and the mounting base plate are detachably connected.

10. A beam limiter, characterized in that, Includes the mechanical iris device as described in any one of claims 1 to 9.

Images