Elastic diaphragm module

Abstract

The invention discloses an elastic diaphragm module, which relates to the technical field of diaphragms and comprises a first barrel, a second barrel and a telescopic elastic piece, the second barrel is arranged on the outer side of the first barrel in a sleeving manner, and the second barrel can rotate around the central axis of the first barrel; the elastic piece is cylindrical and is lightproof, the first end of the elastic piece is fixedly connected with the first cylinder, the second end of the elastic piece is fixedly connected with the second cylinder, and a light hole is formed in the center of the elastic piece; the second cylinder rotates around the center axis of the first cylinder, and the two ends of the elastic piece can rotate and be staggered, so that the elastic piece can spirally contract to reduce the diameter of the light hole. The elastic diaphragm module is simple in overall structure, and transmission abnormal sound in the adjusting process can be reduced.

Description

Technical Field

[0001] This invention relates to the field of aperture technology, and in particular to an elastic aperture module. Background Technology

[0002] Existing mechanical aperture modules consist of a transmission mechanism and multiple aperture blades. The transmission mechanism needs to drive multiple aperture blades to move synchronously, thus requiring high machining precision for each component. If there is a large gap between the aperture blades and the transmission mechanism, there will be transmission play, resulting in lag in aperture adjustment and significant transmission noise. Summary of the Invention

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an elastic aperture module with a simple overall structure, which can also reduce transmission noise during the adjustment process.

[0004] According to an embodiment of the present invention, a flexible aperture module includes a first cylindrical body; The second cylinder is fitted onto the outside of the first cylinder, and the second cylinder is capable of rotating around the central axis of the first cylinder; A retractable elastic element, the elastic element being cylindrical and opaque, the first end of the elastic element being fixedly connected to the first cylindrical body, the second end of the elastic element being fixedly connected to the second cylindrical body, and a light-transmitting hole being formed in the center of the elastic element; The second cylinder rotates around the central axis of the first cylinder, and the two ends of the elastic element can rotate and misalign, so that the elastic element can spirally contract to reduce the diameter of the light-transmitting hole.

[0005] The elastic aperture module according to an embodiment of the present invention has at least the following beneficial effects: one end of the elastic element is fixed to the first cylinder and the other end of the elastic element is fixed to the second cylinder. When the first cylinder and the second cylinder rotate relative to each other, the two ends of the elastic element can rotate and misalign, thereby generating a spiral contraction to reduce the diameter of the light-transmitting hole; when rotating in the opposite direction, the elastic element gradually resets, and the diameter of the light-transmitting hole gradually increases; the overall structure of the elastic aperture module is simple, and no significant noise is generated when the first and second cylinders rotate or when the elastic element extends or retracts.

[0006] According to some embodiments of the present invention, the second cylinder is provided with a first slot, the second end of the elastic member is placed in the first slot, and the first slot is also provided with a first press-fit ring, which is engaged in the first slot and abuts against the elastic member.

[0007] According to some embodiments of the present invention, the end of the second cylinder is provided with a first annular wall and a second annular wall, the first annular wall is located inside the second annular wall, a first groove is formed between the first annular wall and the second annular wall, the first press-fit ring includes a ring body and a positioning ring, the ring body is connected to the positioning ring, the plane of the positioning ring is perpendicular to the axis of the ring body, the ring body is inserted into the first groove, the second end of the elastic member is clamped between the ring body and the second annular wall, and the positioning ring abuts against the end face of the first annular wall.

[0008] According to some embodiments of the present invention, the second end of the elastic member extends to the bottom of the first slot, the second end of the elastic member is clamped between the ring body and the bottom of the first slot, and the elastic member is also clamped by the ring body and the second annular wall.

[0009] According to some embodiments of the present invention, the inner sidewall of the first cylinder is provided with a second slot, the first end of the elastic member is placed in the second slot, and an adhesive is provided between the first end of the elastic member and the second slot.

[0010] According to some embodiments of the present invention, a second press-fit ring is fitted inside the first cylinder, and the first end of the elastic member is clamped between the first cylinder and the second press-fit ring.

[0011] According to some embodiments of the present invention, a through screw hole is provided on the side wall of the second cylinder, and a locking screw is provided in the screw hole. The locking screw can be screwed into the screw hole and abut against the first cylinder.

[0012] According to some embodiments of the present invention, the outer side wall of the first cylinder is provided with a first positioning step, the inner side wall of the second cylinder is provided with a second positioning step, and the second cylinder is fitted onto the first cylinder such that the first positioning step and the second positioning step abut against each other.

[0013] According to some embodiments of the present invention, the outer wall of the second cylinder is provided with an anti-slip structure.

[0014] According to some embodiments of the present invention, the anti-slip structure includes a plurality of strip-shaped protrusions, the length direction of which is parallel to the axial direction of the second cylinder, and the plurality of protrusions are distributed circumferentially around the second cylinder.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of the flexible aperture module in the first adjustment position according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the elastic aperture module in the second adjustment position according to an embodiment of the present invention; Figure 3 This is a cross-sectional view of the flexible aperture module according to an embodiment of the present invention; Figure 4 This is a partially enlarged schematic diagram of the first view of the flexible aperture module according to an embodiment of the present invention; Figure 5 This is a partially enlarged schematic diagram of the second view of the elastic aperture module according to an embodiment of the present invention.

[0017] Icon labels: First cylinder 100, second slot 110, first positioning step 120, second cylinder 200, first slot 210, first annular wall 220, second annular wall 230, second positioning step 240, protrusion 250, elastic element 300, light-transmitting hole 301, first pressing ring 400, ring body 410, positioning ring 420. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0020] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0021] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0022] Reference Figures 1 to 3As shown, an embodiment of the elastic aperture module of the present invention includes a first cylinder 100, a second cylinder 200 and a retractable elastic element 300.

[0023] The second cylinder 200 is fitted onto the outside of the first cylinder 100, and the second cylinder 200 can rotate around the central axis of the first cylinder 100; the elastic element 300 is cylindrical and opaque, the first end of the elastic element 300 is fixedly connected to the first cylinder 100, the second end of the elastic element 300 is fixedly connected to the second cylinder 200, and a light-transmitting hole 301 is formed in the center of the elastic element 300; the second cylinder 200 rotates around the central axis of the first cylinder 100, and the two ends of the elastic element 300 can rotate and be misaligned, so that the elastic element 300 can spirally contract to reduce the diameter of the light-transmitting hole 301.

[0024] The second cylindrical body 200 is located outside the first cylindrical body 100. For ease of adjustment, the first cylindrical body 100 is generally fixed, while the second cylindrical body 200 can rotate. It should be understood that the first cylindrical body 100 can be connected to the lens module and ultimately connected and fixed to the camera or shooting equipment, which will not be described further here.

[0025] Rotate the second cylinder 200 degrees, as follows Figure 1 The state shown is to Figure 2 In the indicated state, a relative rotational displacement occurs between the second cylinder 200 and the first cylinder 100, causing the two ends of the elastic element 300 to rotate and misalign. That is, the elastic element 300 is twisted and then spirally contracted, reducing the diameter of the light-transmitting hole 301 at the center of the elastic element 300 until it is adjusted to the desired diameter. If the diameter of the light-transmitting hole 301 needs to be increased again after its reduction, the second cylinder 200 can be rotated in the opposite direction, gradually restoring the elastic element 300 and gradually increasing the diameter of the light-transmitting hole 301. It should be understood that the rotation direction of the second cylinder 200 can be determined according to actual needs, for example, as... Figure 1 In the structure shown, when the second cylinder 200 rotates counterclockwise, the elastic element 300 can spirally contract to reduce the diameter of the light-transmitting hole 301. When rotated clockwise, the elastic element 300 can return to its original position, increasing the diameter of the light-transmitting hole 301, thus completing the aperture adjustment. It should be understood that the second cylinder 200 can also be configured to rotate clockwise, with the elastic element 300 spirally contracting to reduce the diameter of the light-transmitting hole 301, and rotating counterclockwise to return to its original position.

[0026] It is important to understand that the spiral contraction of the elastic element 300 refers to the movement of the elastic element 300 toward the center when it is twisted, thereby increasing the light-blocking area. In fact, the line connecting the two ends of the elastic element 300 is stretched and lengthened.

[0027] In the above structure, the elastic element 300 is fixedly connected to the first cylinder 100 and the second cylinder 200, and there is no transmission structure. When the second cylinder 200 is rotated, the deformation of the elastic element 300 basically does not generate noise.

[0028] Reference Figure 4 As shown, it can be understood that the second cylinder 200 is provided with a first slot 210, the second end of the elastic member 300 is placed in the first slot 210, the first slot 210 is also provided with a first pressing ring 400, the first pressing ring 400 is inserted into the first slot 210 and abuts against the elastic member 300.

[0029] During assembly, first place the second end of the elastic element 300 into the first slot 210, then install the first pressing ring 400. After the first pressing ring 400 fixes the second end of the elastic element 300, flip the elastic element 300 over and then complete the fixing of the first end of the elastic element 300.

[0030] It is understood that the end of the second cylinder 200 is provided with a first annular wall 220 and a second annular wall 230. The first annular wall 220 is located inside the second annular wall 230. A first groove 210 is formed between the first annular wall 220 and the second annular wall 230. The first press-fit ring 400 includes a ring body 410 and a positioning ring 420. The ring body 410 is connected to the positioning ring 420. The plane where the positioning ring 420 is located is perpendicular to the axis of the ring body 410. The ring body 410 is inserted into the first groove 210. The second end of the elastic member 300 is clamped between the ring body 410 and the second annular wall 230. The positioning ring 420 abuts against the end face of the first annular wall 220.

[0031] The ring 410 engages with the second annular wall 230 to clamp and fix the elastic element 300, while the positioning ring 420 engages with the first annular wall 220 to restrict the installation position of the ring 410. It should be understood that the thickness of the elastic element 300 is greater than the distance between the ring 410 and the second annular wall 230, allowing the ring 410 to compress the elastic element 300 and generate static friction, thus fixing the elastic element 300 in place.

[0032] Understandably, the second end of the elastic member 300 extends to the bottom of the first slot 210, the second end of the elastic member 300 is clamped between the ring body 410 and the bottom of the first slot 210, and the elastic member 300 is also clamped by the ring body 410 and the second annular wall 230.

[0033] In the above structure, the clamping area of ​​the elastic element 300 is increased, the reliability of fixing the elastic element 300 is improved, and the second end of the elastic element 300 is more difficult to dislodge from the first slot 210.

[0034] Understandably, the inner wall of the first cylindrical body 100 is provided with a second slot 110, and the first end of the elastic member 300 is inserted into the second slot 110, with adhesive between the first end of the elastic member 300 and the second slot 110. In a further improvement, it is understood that a second pressure ring is fitted inside the first cylindrical body 100, and the first end of the elastic member 300 is clamped between the first cylindrical body 100 and the second pressure ring.

[0035] While using adhesive to fix the first end of the elastic element 300 to the second slot 110, the second pressure ring can also be used to further clamp the elastic element 300, preventing the first end of the elastic element 300 from loosening. It should be understood that, if the requirements are met, only the second pressure ring can be used to fix the first end of the elastic element 300, reducing the use of adhesive.

[0036] Understandably, the side wall of the second cylinder 200 has a through screw hole with a locking screw that can be screwed into the screw hole and abut against the first cylinder 100.

[0037] The locking screw is used to secure the first cylinder 100 and the second cylinder 200, preventing the second cylinder 200 from rotating uncontrollably under the elastic force of the elastic element 300. It should be understood that before rotating the second cylinder 200, the locking screw must be loosened, the second cylinder 200 rotated and adjusted to the desired position, and then the locking screw must be tightened again to complete the fixation of the first cylinder 100 and the second cylinder 200.

[0038] It is understood that the outer side wall of the first cylinder 100 is provided with a first positioning step 120, and the inner side wall of the second cylinder 200 is provided with a second positioning step 240. The second cylinder 200 is fitted onto the first cylinder 100, so that the first positioning step 120 and the second positioning step 240 abut against each other.

[0039] like Figure 3 In the structure shown, or referring to Figure 5 The enlarged schematic diagram shows that the second cylinder 200 is fitted over the first cylinder 100 from top to bottom until the first positioning step 120 and the second positioning step 240 abut against each other, that is, the second cylinder 200 is installed in place.

[0040] Understandably, the outer wall of the second cylinder 200 is equipped with an anti-slip structure.

[0041] In some embodiments, the rotation of the second cylinder 200 is done by hand, so the outer side wall of the second cylinder 200 is provided with an anti-slip structure to help to turn the second cylinder 200.

[0042] Understandably, the anti-slip structure includes multiple strip-shaped protrusions 250. The length direction of the protrusions 250 is parallel to the axial direction of the second cylinder 200, and the multiple protrusions 250 are distributed circumferentially around the second cylinder 200. The length direction of the protrusions 250 is also perpendicular to the rotation direction of the second cylinder 200, meaning that the force applied to the second cylinder 200 can be effectively applied to the protrusions 250, pushing the second cylinder 200 to rotate.

[0043] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A flexible aperture module, characterized in that, include: First cylinder; The second cylinder is fitted onto the outside of the first cylinder, and the second cylinder is capable of rotating around the central axis of the first cylinder; A retractable elastic element, the elastic element being cylindrical and opaque, the first end of the elastic element being fixedly connected to the first cylindrical body, the second end of the elastic element being fixedly connected to the second cylindrical body, and a light-transmitting hole being formed in the center of the elastic element; The second cylinder rotates around the central axis of the first cylinder, and the two ends of the elastic element can rotate and misalign, so that the elastic element can spirally contract to reduce the diameter of the light-transmitting hole.

2. The flexible aperture module according to claim 1, characterized in that, The second cylinder is provided with a first slot, and the second end of the elastic element is placed into the first slot. The first slot is also provided with a first press-fit ring, which is engaged in the first slot and abuts against the elastic element.

3. The flexible aperture module according to claim 2, characterized in that, The end of the second cylinder is provided with a first annular wall and a second annular wall. The first annular wall is located inside the second annular wall. A first groove is formed between the first annular wall and the second annular wall. The first press-fit ring includes a ring body and a positioning ring. The ring body is connected to the positioning ring. The plane where the positioning ring is located is perpendicular to the axis of the ring body. The ring body is inserted into the first groove. The second end of the elastic element is clamped between the ring body and the second annular wall. The positioning ring abuts against the end face of the first annular wall.

4. The flexible aperture module according to claim 3, characterized in that, The second end of the elastic element extends to the bottom of the first slot, the second end of the elastic element is clamped between the ring body and the bottom of the first slot, and the elastic element is also clamped by the ring body and the second annular wall.

5. The flexible aperture module according to claim 1, characterized in that, The inner wall of the first cylinder is provided with a second slot, the first end of the elastic element is placed in the second slot, and adhesive is provided between the first end of the elastic element and the second slot.

6. The flexible aperture module according to claim 5, characterized in that, A second press-fit ring is fitted inside the first cylinder, and the first end of the elastic element is clamped between the first cylinder and the second press-fit ring.

7. The flexible aperture module according to claim 1, characterized in that, The second cylinder has a through screw hole on its side wall, and a locking screw is provided in the screw hole. The locking screw can be screwed into the screw hole and abut against the first cylinder.

8. The flexible aperture module according to claim 1, characterized in that, The outer side wall of the first cylinder is provided with a first positioning step, and the inner side wall of the second cylinder is provided with a second positioning step. The second cylinder is fitted onto the first cylinder so that the first positioning step and the second positioning step abut against each other.

9. The flexible aperture module according to claim 1, characterized in that, The outer wall of the second cylinder is provided with an anti-slip structure.

10. The flexible aperture module according to claim 9, characterized in that, The anti-slip structure includes multiple strip-shaped protrusions, the length direction of which is parallel to the axial direction of the second cylinder, and the multiple protrusions are distributed circumferentially around the second cylinder.

Images