Anti-shake and anti-seismic manual diaphragm with elastic structure

Abstract

The utility model discloses an elastic structure anti-shake anti-seismic 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 retaining shoulder; 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. An elastic structure is arranged between the limiting clamping ring and the upper surface of the driving ring; the elastic structure is a wave-shaped elastic sheet in a circular ring shape, and the wave-shaped elastic sheet elastically abuts against the lower surface of the limiting clamping ring and the upper surface of the driving ring; or the elastic structure is composed of a plurality of elastic convex parts which are formed on the limiting clamping ring in a stamping mode, all the elastic convex parts protrude out of the lower surface of the limiting clamping ring and elastically abut against the upper surface of the driving ring, and all the elastic convex parts and the limiting clamping ring are of an integrated structure. 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 diaphragms, in particular to an elastic structure anti-shake and anti-seismic manual diaphragm. Background Technique

[0002] As an important mechanism of a lens, a diaphragm is mainly used to control the light passing through 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 number of circular holes evenly distributed in a circumferential direction, 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 number 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 provided 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, the clamping force of the anti-slip rubber strip on the diaphragm cover becomes smaller or disappears after wear, which will cause 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. Content of the Utility Model

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

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

[0010] An elastic structure 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 the driving ring 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] An elastic structure is installed between the upper surface of the limiting clamping ring and the driving ring.

[0014] The elastic structure is a corrugated elastic sheet in a circular ring shape. The corrugated elastic sheet is elastically abutted against the lower surface of the limiting clamping ring and the upper surface of the driving ring respectively.

[0015] Or, the elastic structure is a plurality of elastic convex parts respectively stamped on the limiting clamping ring. Each elastic convex part protrudes from the lower surface of the limiting clamping ring, and each elastic convex part is elastically abutted against the upper surface of the driving ring respectively. Each elastic convex part and the limiting clamping ring are of an integral structure.

[0016] Wherein, an annular clamping groove is opened at the upper end of the inner circumferential surface of the side wall, and the limiting clamping ring is clamped in the annular clamping groove of the side wall.

[0017] Wherein, a limiting groove communicating with the annular clamping groove is opened at the upper end of the side wall. A limiting convex part protruding outwards is arranged at the edge of the limiting clamping ring, and the limiting convex part of the limiting clamping ring is embedded in the limiting groove of the side wall.

[0018] Wherein, an annular clearance groove in a circular ring shape is opened at the position corresponding to the driving ring on the inner circumferential surface of the side wall, and the inner circumferential surface of the side wall is in partial contact with the outer circumferential surface of the driving ring.

[0019] 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.

[0020] The bottom of the base is respectively provided with pivot holes corresponding to the fixed - end rivets of each blade, and the fixed - end rivets of each blade are respectively pivotally installed in the corresponding pivot holes;

[0021] The driving ring is respectively provided with sliding grooves corresponding to the free - end rivets of each blade, and the free - end rivets of each blade are respectively slidably installed in the corresponding sliding grooves.

[0022] Wherein, a concave fillet is arranged at the position where the upper surface of the bottom contacts the inner circumferential surface of the side wall.

[0023] Compared with the prior art, the utility model has the following beneficial effects: specifically:

[0024] 1. The elastic structure can cause an extrusion effect between the driving ring and the limit retaining ring, and this extrusion effect can effectively increase the frictional resistance between the driving ring and the limit retaining ring; when the driving ring rotates to the required position, the above - mentioned frictional resistance can keep the driving ring in the required position, that is, in the case of vibration or jitter, the driving ring can still be stably kept in the required position to achieve the anti - shake and anti - vibration functions;

[0025] 2. Compared with the prior art, the utility model 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;

[0026] 3. Therefore, the utility model has the advantages of novel structural design, good stability and reliability, and good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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.

[0028] Figure 1 It is a schematic structural diagram of the first embodiment of the utility model.

[0029] Figure 2 It is Figure 1 an exploded schematic diagram.

[0030] Figure 3 It is a partial cross - sectional schematic diagram of the first embodiment of the utility model.

[0031] Figure 4 It is a schematic structural diagram of the second embodiment of the utility model.

[0032] Figure 5 It is a schematic structural diagram of the limit retaining ring of the second embodiment of the utility model.

[0033] In Figures 1 to 5 it includes:

[0034] 1 - Base; 11 - Bottom; 12 - Side wall; 13 - Limit shoulder; 14 - Annular clamping groove; 15 - Limit groove 16 - Annular clearance groove; 17 - Pivoting hole; 18 - Concave fillet; 2 - Driving ring; 21 - Sliding groove; 3 - Limit snap ring; 31 - Limit convex part; 4 - Blade; 41 - Free end rivet; 42 - Fixed end rivet; 5 - Wave spring; 6 - Elastic convex part. Specific embodiments

[0035] The present utility model will be described below in conjunction with specific embodiments.

[0036] Embodiment 1, as Figures 1 to 4 shown, an elastic structure anti - shake and anti - seismic manual diaphragm includes a base 1, a driving ring 2, a limit snap ring 3 and a plurality of blades 4. The base 1 includes a bottom 11 in the shape of a ring and a side wall 12 in the shape of a ring provided at the edge of the bottom 11. The side wall 12 is provided with a limit shoulder 13 above the bottom 11.

[0037] Among them, as Figures 1 to 4 shown, the limit snap ring 3 is fixedly installed at the upper end of the side wall 12, and the driving ring 2 is rotatably installed inside the side wall 12, and the driving ring 2 is vertically limited between the limit shoulder 13 and the limit snap ring 3.

[0038] Further, as Figure 2 and Figure 4 shown, 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.

[0039] Furthermore, an elastic structure is installed between the upper surface of the limit snap ring 3 and the driving ring 2.

[0040] Specifically, as Figures 1 to 3 shown, the elastic structure is a wave spring 5 in the shape of a ring. The wave spring 5 is elastically abutted against the lower surface of the limit snap ring 3 and the upper surface of the driving ring 2 respectively. Or, as Figure 4 and Figure 5 shown, the elastic structure is a plurality of elastic convex parts 6 respectively stamped on the limit snap ring 3. Each elastic convex part 6 protrudes from the lower surface of the limit snap ring 3, and each elastic convex part 6 is elastically abutted against the upper surface of the driving ring 2 respectively. Each elastic convex part 6 and the limit snap ring 3 are of an integral structure.

[0041] It should be noted that for the elastic structure anti - shake and anti - seismic manual diaphragm of the first embodiment, the elastic structure can cause a squeezing effect between the driving ring 2 and the limiting clamping ring 3, and this squeezing effect can effectively increase the frictional resistance between the driving ring 2 and the limiting clamping ring 3; when the driving ring 2 rotates to the required position, the above - mentioned frictional resistance can keep the driving ring 2 at the required position, that is, in the case of vibration or jitter, the driving ring 2 can still be stably maintained at the required position to achieve the anti - shake and anti - seismic functions.

[0042] Compared with the prior art, the elastic structure anti - shake and anti - seismic manual diaphragm of the first embodiment will not have the problem that the positioning stability becomes poor due to the wear of the rubber strip, nor will it be affected by the dust generated by the wear of the rubber strip on the imaging effect of the lens.

[0043] Based on the above - mentioned situation, through the above - mentioned structural design, the elastic structure anti - shake and anti - seismic manual diaphragm of the first embodiment has the advantages of novel structural design, good stability and reliability, and good use effect.

[0044] Embodiment 2, as Figure 2 、 Figure 3 and Figure 4 shown, the difference between the second embodiment and the first embodiment is that: an annular clamping groove 14 is provided at the upper end of the inner circumferential surface of the side wall 12, and the limiting clamping ring is clamped in the annular clamping groove 14 of the side wall 12.

[0045] In addition, a limiting groove 15 communicating with the annular clamping groove 14 is provided at the upper end of the side wall 12, and a limiting convex part 31 protruding outwards is provided at the edge of the limiting clamping ring 3, and the limiting convex part 31 of the limiting clamping ring 3 is embedded in the limiting groove 15 of the side wall 12.

[0046] The limiting clamping ring can perform vertical limiting on the limiting clamping ring 3, and the cooperation between the limiting convex part 31 and the limiting groove 15 can realize the axial limiting of the limiting clamping ring 3 to ensure that the limiting clamping ring 3 is stably and reliably installed at the upper end of the side wall 12.

[0047] Embodiment 3, as Figure 3 shown, the difference between the third embodiment and the first embodiment is that: an annular clearance groove 16 in a circular ring shape is provided on the inner circumferential surface of the side wall 12 at the position corresponding to the driving ring 2, and the inner circumferential surface of the side wall 12 is in partial contact with the outer circumferential surface of the driving ring 2.

[0048] In the third embodiment, by providing an annular clearance groove 16 on the inner circumferential surface of the side wall 12, the inner circumferential surface of the side wall 12 can be in partial contact with the outer circumferential surface of the driving ring 2. This contact method can effectively reduce the frictional 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 of the manual rotation operation.

[0049] Embodiment Four. The difference between Embodiment Four and Embodiment One lies in that the free ends and fixed ends of the respective blades 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 17 are respectively formed in 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 17; sliding grooves 21 are respectively formed in 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 21.

[0050] Embodiment Five, as Figure 3 shown, the difference between Embodiment Five and Embodiment One is that a concave fillet 18 is provided at the position where the upper surface of the bottom 11 is in contact with the inner circumferential surface of the side wall 12.

[0051] For the above-mentioned concave fillet 18, its function is to prevent the blade 4 from interfering with the base 1 during the rotation operation.

[0052] 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 manners and application scopes. The content of this specification should not be construed as a limitation to the present utility model.

Claims

1. An elastic structure anti-vibration and anti-seismic manual diaphragm, comprising 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). 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). Each blade (4) has a fixed end and a free end. The fixed ends of the blades (4) are respectively pivotally connected to the bottom (11) of the base (1), and the free ends of the blades (4) are respectively slidably connected to the driving ring (2). Characterized in that: An elastic structure is installed between the upper surface of the limiting snap ring (3) and the driving ring (2). The elastic structure is a corrugated elastic sheet (5) in a circular ring shape. The corrugated elastic sheet (5) is elastically abutted against the lower surface of the limiting snap ring (3) and the upper surface of the driving ring (2) respectively. Alternatively, the elastic structure is a plurality of elastic convex parts (6) respectively stamped on the limiting snap ring (3). Each elastic convex part (6) protrudes from the lower surface of the limiting snap ring (3), and each elastic convex part (6) is elastically abutted against the upper surface of the driving ring (2). Each elastic convex part (6) and the limiting snap ring (3) are of an integral structure.

2. The anti - shake and anti - seismic manual diaphragm with an elastic structure according to claim 1, characterized in that: An annular clamping groove (14) is opened at the upper end of the inner circumferential surface of the side wall (12), and the limiting snap ring (3) is clamped in the annular clamping groove (14) of the side wall (12).

3. The anti-shake and anti-seismic manual diaphragm with an elastic structure according to claim 2, characterized in that: A limiting groove (15) communicating with the annular clamping groove (14) is opened at the upper end of the side wall (12). A limiting convex part (31) protruding outwards is provided at the edge of the limiting snap ring (3), and the limiting convex part (31) of the limiting snap ring (3) is embedded in the limiting groove (15) of the side wall (12).

4. The flexible structure anti-shake and anti-seismic manual diaphragm according to claim 1, wherein: An annular clearance groove (16) in a circular ring shape is opened at the position of the inner circumferential surface of the side wall (12) corresponding to the driving ring (2), and the inner circumferential surface of the side wall (12) is in partial contact with the outer circumferential surface of the driving ring (2).

5. The elastic structure anti-shake and anti-seismic manual diaphragm according to claim 1, characterized in that: Free end rivets (41) are respectively provided at the free ends of the blades (4), and fixed end rivets (42) are respectively provided at the fixed ends of the blades (4). Pivoting holes (17) are respectively opened at the bottom (11) of the base (1) corresponding to the fixed end rivets (42) of the blades (4), and the fixed end rivets (42) of the blades (4) are respectively pivotally installed in the corresponding pivoting holes (17). Sliding grooves (21) are respectively opened at the driving ring (2) corresponding to the free end rivets (41) of the blades (4), and the free end rivets (41) of the blades (4) are respectively slidably installed in the corresponding sliding grooves (21).

6. The elastic structure anti-shake and earthquake-resistant manual diaphragm according to claim 1, wherein: An inner concave fillet (18) is provided at the position where the upper surface of the bottom (11) is in contact with the inner circumferential surface of the side wall (12).

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