Magnetic type anti-shake and anti-seismic manual diaphragm

Abstract

The utility model discloses a magnetic type anti-shake shock-resistant manual diaphragm, which comprises a base, a driving ring, a limiting snap ring and a plurality of blades, and is characterized in that the base comprises a bottom and a side wall, and the side wall is provided with a limiting shoulder positioned above the bottom; the limiting clamping ring is fixedly installed at the upper end of the side wall, and the driving ring is rotationally installed on the inner side of the side wall and vertically limited between the limiting blocking shoulder and the limiting clamping ring. Each blade is provided with a fixed end part and a free end part, the fixed end part of each blade is pivoted with the bottom of the base, and the free end part of each blade is in sliding connection with the driving ring; the upper surface of the driving ring makes contact with the lower surface of the limiting clamping ring, a plurality of magnet mounting holes which are sequentially formed in the extending direction of the driving ring at intervals are formed in the upper surface of the driving ring, and auxiliary magnets magnetically attracted to the limiting clamping ring are fixedly embedded in the magnet mounting holes correspondingly. By means of the structural design, the device has the advantages of being novel in structural design, good in stability and reliability and good in using effect.

Description

Technical Field

[0001] The utility model relates to the technical field of optical structures, in particular to a magnetic adsorption type anti-shake and anti-vibration manual diaphragm. Background Art

[0002] As an important mechanism of a lens, a diaphragm is mainly used to control the light passing amount of an optical system, so as to change the illuminance of an image plane and control the exposure time, thereby enabling the lens to obtain better clarity. Among them, diaphragms are widely used in industrial camera lenses and film and television camera lenses.

[0003] The Chinese utility model patent with the patent number ZL202321554315.1 and the patent name of an adjustable diaphragm with high stability actually discloses a manual diaphragm. Specifically, the adjustable diaphragm with high stability includes a diaphragm seat, a plurality of diaphragm blades, a diaphragm cover, a snap ring and an adjusting rod. The diaphragm seat is provided with a plurality of circular holes evenly distributed in a circumferential manner. A notch is provided on the side of the diaphragm seat, and a clamping groove is provided inside the diaphragm seat. The diaphragm cover is rotatably arranged inside the diaphragm seat, and a plurality of notches are provided on the diaphragm cover. The snap ring is located inside the clamping groove, and one side of the snap ring abuts against the diaphragm cover. The diaphragm blades are located between the diaphragm cover and the diaphragm seat, and fixing shafts are arranged on both sides of the diaphragm blades. One end of the fixing shaft is rotatably arranged in the circular hole, and the other side of the fixing shaft is slidably arranged in the notch. A convex ring is arranged inside the diaphragm seat, and a rubber anti-slip strip is fixed on the convex ring, and the rubber anti-slip strip abuts against the edge of the diaphragm cover.

[0004] For the above-mentioned adjustable diaphragm with high stability, during operation, the diaphragm cover is driven to rotate by the adjusting rod to adjust the position of the diaphragm blades, thereby adjusting the aperture size. Since the diaphragm cover is clamped by the snap ring and the rubber anti-slip strip, the frictional resistance received by the operator when rotating the diaphragm cover is greater, and the resistance to the rotation of the diaphragm cover is also greater, so as to improve the stability after the diaphragm is adjusted.

[0005] It should be noted that for the above-mentioned adjustable diaphragm with high stability, it has the following defects, specifically:

[0006] Defect 1: The anti-slip rubber strip and the snap ring cooperate to realize the clamping and positioning of the diaphragm cover. Since the anti-slip rubber strip will gradually wear during the rotation of the diaphragm cover, and the aging of the anti-slip rubber strip itself will also accelerate the wear. After the anti-slip rubber strip wears, the clamping force on the diaphragm cover becomes smaller or disappears, which makes it difficult for the anti-slip rubber strip to accurately clamp and position the diaphragm cover, and the stability and reliability are poor.

[0007] Defect 2: When the anti-slip rubber strip wears, dust will be generated, and the dust will affect the imaging quality of the lens, and the use effect is poor. Utility Model Content

[0008] The purpose of the present utility model is to provide a magnetic - absorption type anti - shake and anti - seismic manual diaphragm aiming at the deficiencies of the prior art. The magnetic - absorption type anti - shake and anti - seismic manual diaphragm has a novel structural design, good stability and reliability, and good use effect.

[0009] To achieve the above - mentioned purpose, the present utility model is realized through the following technical solutions.

[0010] A magnetic - absorption type anti - shake and anti - seismic manual diaphragm includes a base, a driving ring, a limiting clamping ring and a plurality of blades. The base includes a bottom in a circular ring shape and a side wall in a circular ring shape arranged at the edge of the bottom. The side wall is provided with a limiting shoulder located above the bottom.

[0011] The limiting clamping ring is fixedly installed at the upper end of the side wall. The driving ring is rotatably installed inside the side wall and is vertically limited between the limiting shoulder and the limiting clamping ring.

[0012] Each blade has a fixed end and a free end. The fixed ends of the blades are respectively pivotally connected to the bottom of the base, and the free ends of the blades are respectively slidably connected to the driving ring.

[0013] The upper surface of the driving ring is in contact with the lower surface of the limiting clamping ring, and a plurality of magnet mounting holes are arranged at intervals in sequence along the extending direction of the driving ring on the upper surface of the driving ring. Auxiliary magnets magnetically adsorbed to the limiting clamping ring are respectively embedded and fixed in the magnet mounting holes.

[0014] The upper surface of the auxiliary magnet is horizontally aligned with the upper surface of the driving ring; or, the upper surface of the auxiliary magnet is lower than the upper surface of the driving ring.

[0015] Wherein, the inner circumferential surface of the side wall between the limiting shoulder and the limiting clamping ring is a stepped surface, and a part of the stepped surface is a first contact surface; a part of the outer circumferential surface of the driving ring is a second contact surface, and the outer circumferential surface of the driving ring is in contact with the inner circumferential surface of the side wall only through the first contact surface and the second contact surface.

[0016] Wherein, a circular - ring - shaped marking process groove is arranged on the outer circumferential surface of the driving ring.

[0017] Wherein, free - end rivets are respectively arranged at the free ends of the blades, and fixed - end rivets are respectively arranged at the fixed ends of the blades;

[0018] Corresponding pivot holes are respectively opened on the bottom of the base for the fixed - end rivets of the blades, and the fixed - end rivets of the blades are respectively pivotally installed in the corresponding pivot holes.

[0019] Corresponding chutes are respectively opened on the driving ring for the free - end rivets of the blades, and the free - end rivets of the blades are respectively slidably installed in the corresponding chutes.

[0020] Among them, each of the sliding grooves opens inwardly, and the inner ends of the sliding grooves are respectively in a constricted shape.

[0021] Among them, a notch is provided on the side wall between the limiting shoulder and the limiting snap ring, and a driving handle passing through the notch and extending to the outside of the side wall is installed on the driving ring.

[0022] Compared with the prior art, the utility model has the following beneficial effects, specifically:

[0023] 1. The magnetic force of the auxiliary magnet on the limiting snap ring can effectively increase the contact friction force between the driving ring and the limiting snap ring; when the driving ring rotates to the required position, the auxiliary magnet can keep the driving ring at the required position, that is, in the case of vibration or jitter, the driving ring can still be stably kept at the required position to achieve the anti-shake and anti-vibration functions;

[0024] 2. Compared with the prior art, the magnetic absorption type anti-shake and anti-vibration manual diaphragm of the utility model will not have the problem of poor positioning stability due to the wear of the rubber strip, nor will the dust generated by the wear of the rubber strip affect the imaging effect of the lens;

[0025] 3. Therefore, the magnetic absorption type anti-shake and anti-vibration manual diaphragm of the utility model has the advantages of novel structural design, good stability and reliability, and good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following uses the drawings to further illustrate the utility model, but the embodiments in the drawings do not constitute any limitation to the utility model.

[0027] Figure 1 is a schematic structural diagram of the utility model.

[0028] Figure 2 is Figure 1 exploded schematic diagram of.

[0029] Figure 3 is a partial cross-sectional schematic diagram of the utility model.

[0030] Figure 4 is a schematic structural diagram of the driving ring of the utility model.

[0031] In Figures 1 to 4 include:

[0032] 1 - base; 11 - bottom; 12 - side wall; 13 - limiting shoulder; 14 - first contact surface; 15 - pivot hole; 16 - notch; 2 - driving ring; 21 - magnet mounting hole; 22 - second contact surface; 23 - marking process groove; 24 - sliding groove; 3 - limiting snap ring; 4 - blade; 41 - free end rivet; 42 - fixed end rivet; 5 - auxiliary magnet; 6 - driving handle. Detailed implementation manners

[0033] The present utility model will be described below in conjunction with specific implementation manners.

[0034] Embodiment 1, as Figures 1 to 3 shown, a magnetic absorption type anti - shake and anti - vibration manual diaphragm includes a base 1, a driving ring 2, a limiting snap ring 3 and a plurality of blades 4. The base 1 includes a bottom 11 in a circular ring shape and a side wall 12 in a circular ring shape provided at the edge of the bottom 11. The side wall 12 is provided with a limiting shoulder 13 above the bottom 11.

[0035] Among them, as Figures 1 to 3 shown, the limiting snap ring 3 is fixedly installed at the upper end of the side wall 12. The driving ring 2 is rotatably installed inside the side wall 12, and the driving ring 2 is vertically limited between the limiting shoulder 13 and the limiting snap ring 3.

[0036] In addition, each blade 4 has a fixed end and a free end. The fixed ends of each blade 4 are respectively pivotally connected to the bottom 11 of the base 1, and the free ends of each blade 4 are respectively slidably connected to the driving ring 2;

[0037] Furthermore, as Figures 1 to 4 shown, the upper surface of the driving ring 2 is in contact with the lower surface of the limiting snap ring 3, and a plurality of magnet mounting holes 21 are arranged at intervals in sequence along the extending direction of the driving ring 2 on the upper surface of the driving ring 2. An auxiliary magnet 5 magnetically adsorbed to the limiting snap ring 3 is respectively fixedly installed in each magnet mounting hole 21. It should be explained that the upper surface of the auxiliary magnet 5 is horizontally aligned with the upper surface of the driving ring 2; or, the upper surface of the auxiliary magnet 5 is lower than the upper surface of the driving ring 2.

[0038] It should be noted that for the magnetic absorption type anti - shake and anti - vibration manual diaphragm of Embodiment 1, a plurality of auxiliary magnets 5 installed on the driving ring 2 magnetically adsorb and fix the snap ring. The magnetic force of the auxiliary magnets 5 on the limiting snap ring 3 can effectively increase the contact friction between the driving ring 2 and the limiting snap ring 3; when the driving ring 2 rotates to the required position, the auxiliary magnets 5 can make the driving ring 2 remain in the required position, that is, in the case of vibration or jitter, the driving ring 2 can still be stably maintained in the required position to achieve the anti - shake and anti - vibration function.

[0039] Compared with the prior art, the magnetic absorption type anti - shake and anti - vibration manual diaphragm of Embodiment 1 will not have the problem that the positioning stability becomes poor due to the wear of the rubber strip, nor will it have the problem that the dust generated by the wear of the rubber strip affects the imaging effect of the lens.

[0040] Based on the above - mentioned situation, through the above - mentioned structural design, the magnetic absorption type anti - shake and anti - vibration manual diaphragm of Embodiment 1 has the advantages of novel structural design, good stability and reliability, and good use effect.

[0041] Example 2, as Figures 2 to 4 shown, the difference between this Example 2 and Example 1 is that: the inner circumferential surface of the side wall 12 between the limiting shoulder 13 and the limiting snap ring 3 is a stepped surface, and a part of this stepped surface is the first contact surface 14; a part of the outer circumferential surface of the driving ring 2 is the second contact surface 22, and the outer circumferential surface of the driving ring 2 and the inner circumferential surface of the side wall 12 are in contact only through the first contact surface 14 and the second contact surface 22.

[0042] The outer circumferential surface of the driving ring 2 and the inner circumferential surface of the side wall 12 are in contact only through the first contact surface 14 and the second contact surface 22. This contact method between the outer circumferential surface of the driving ring 2 and the inner circumferential surface of the side wall 12 can effectively reduce the friction contact area between the two. During the process of manually rotating the driving ring 2 to adjust the size of the light hole, the small-area contact method between the outer circumferential surface of the driving ring 2 and the inner circumferential surface of the side wall 12 can reduce the noise during the rotation of the driving ring 2 and improve the smoothness during manual rotation operation.

[0043] Example 3, as Figures 2 to 4 shown, the difference between this Example 3 and Example 2 is that: a circular ring-shaped marking process groove 23 is provided on the outer circumferential surface of the driving ring 2.

[0044] For the marking process groove 23 of this Example 3, the marking process groove 23 separates the second contact surface 22 of the driving ring 2 from other parts. When performing anodic surface treatment on the second contact surface 22, the marking process groove 23 can accurately indicate the clamping position of the driving ring 2.

[0045] Example 4, as Figure 2 shown, the difference between this Example 4 and Example 1 is that the free ends and fixed ends of the respective blades 4 of this Example 4 are connected to the corresponding bottom 11 and driving ring 2 in the following ways respectively. Specifically: free end rivets 41 are respectively provided at the free ends of the respective blades 4, and fixed end rivets 42 are respectively provided at the fixed ends of the respective blades 4; pivot holes 15 are respectively opened at the bottom 11 of the base 1 corresponding to the fixed end rivets 42 of the respective blades 4, and the fixed end rivets 42 of the respective blades 4 are respectively pivotally installed in the corresponding pivot holes 15; sliding grooves 24 are respectively opened at the driving ring 2 corresponding to the free end rivets 41 of the respective blades 4, and the free end rivets 41 of the respective blades 4 are respectively slidably installed in the corresponding sliding grooves 24.

[0046] Example 5, as Figure 4 shown, the difference between this Example 5 and Example 4 is that: the respective sliding grooves 24 open inwards, and the inner ends of the respective sliding grooves 24 are in a constricted shape.

[0047] By designing the inner end openings of the respective sliding grooves 24 into a constricted shape, this shape design causes anti - detachment reverse buckles to be formed at the opening positions of the respective sliding grooves 24. The function of these anti - detachment reverse buckles is that when the blade 4 is subjected to an external force and undergoes compressive deformation, the anti - detachment reverse buckles can effectively prevent the free - end rivets 41 at the free ends of the blade 4 from slipping out of the corresponding sliding grooves 24, and thus can effectively increase the stable reliability of the installation of the blade 4.

[0048] Embodiment Six, as Figure 1 and Figure 2 shown, the difference between this Embodiment Six and Embodiment One is that a notch 16 is provided on the side wall 12 between the limit shoulder 13 and the limit snap ring 3, and a driving handle 6 is installed on the driving ring 2 and passes through the notch 16 and extends to the outside of the side wall 12.

[0049] When manually rotating the driving ring 2, the staff can directly operate the driving handle 6 to drive the driving ring 2 to rotate through the driving handle 6.

[0050] The above content is only the preferred embodiment of the present utility model. For those of ordinary skill in the art, based on the idea of the present utility model, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A magnetic anti-shake and anti-vibration manual diaphragm, comprising a base (1), a drive ring (2), a limit clamping ring (3) and a plurality of blades (4), wherein the base (1) comprises a bottom (11) in the shape of a circular ring, a side wall (12) in the shape of a circular ring and arranged at the edge of the bottom (11), and the side wall (12) is provided with a limit stop shoulder (13) located above the bottom (11); The limiting snap ring (3) is fixedly mounted on the upper end of the side wall (12), the driving ring (2) is rotatably mounted on the inner side of the side wall (12), and the driving ring (2) is vertically limited between the limiting shoulder (13) and the limiting snap ring (3); Each blade (4) has a fixed end and a free end, the fixed end of each blade (4) is pivotally connected to the bottom (11) of the base (1), and the free end of each blade (4) is slidably connected to the drive ring (2); Features: The upper surface of the drive ring (2) contacts the lower surface of the limit clamp ring (3), and the upper surface of the drive ring (2) is provided with a plurality of magnet mounting holes (21) arranged in sequence and at intervals along the extension direction of the drive ring (2), and each magnet mounting hole (21) has an auxiliary magnet (5) magnetically attracted to the limit clamp ring (3) embedded and fixed in each magnet mounting hole (21); The upper surface of the auxiliary magnet (5) is horizontally aligned with the upper surface of the drive ring (2); or, the upper surface of the auxiliary magnet (5) is lower than the upper surface of the drive ring (2).

2. The magnetic anti-shake and anti-vibration manual diaphragm according to claim 1, characterized in that: The inner circumferential surface of the side wall (12) between the limit stop shoulder (13) and the limit clamping ring (3) is a stepped surface, and a portion of the stepped surface is a first contact surface (14); a portion of the outer circumferential surface of the drive ring (2) is a second contact surface (22), and the outer circumferential surface of the drive ring (2) and the inner circumferential surface of the side wall (12) are in contact only through the first contact surface (14) and the second contact surface (22).

3. The magnetic anti-shake and anti-vibration manual diaphragm according to claim 2, characterized in that: The outer circumferential surface of the driving ring (2) is provided with a marking process groove (23) in the shape of a circular ring.

4. The magnetic anti-shake and anti-vibration manual diaphragm according to claim 1, characterized in that: The free end of each blade (4) is respectively provided with a free end rivet (41), and the fixed end of each blade (4) is respectively provided with a fixed end rivet (42); The bottom (11) of the base (1) is provided with pivot holes (15) corresponding to the fixed end rivets (42) of each blade (4), and the fixed end rivets (42) of each blade (4) are pivotally mounted in the corresponding pivot holes (15); The drive ring (2) is provided with a slide groove (24) corresponding to the free end rivet (41) of each blade (4), and the free end rivet (41) of each blade (4) is slidably mounted in the corresponding slide groove (24).

5. The magnetic anti-shake and anti-vibration manual diaphragm according to claim 4, characterized in that: Each of the slide grooves (24) opens inwards, and the inner end opening of each of the slide grooves (24) is in a constricted shape.

6. The magnetic anti-shake and anti-vibration manual diaphragm according to claim 1, characterized in that: The side wall (12) is provided with a notch (16) located between the limit stop shoulder (13) and the limit clamp ring (3), and the drive ring (2) is provided with a drive handle (6) passing through the notch (16) and extending to the outside of the side wall (12).

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