Shutter double-magnetic-valve connecting rod structure

Abstract

The invention relates to a shutter double-magnetic-valve connecting rod structure which comprises a fixing seat, a magnetic valve base is installed in an inner cavity of the top end of the fixing seat, the magnetic valve base is arranged in the fixing seat, two magnets are installed on the opposite angles of the magnetic valve base, and the bottoms of the magnets are rotationally connected with magnet rocking handles. The connecting rod main body is arranged between the two magnet rocking handles for linkage, and the connecting rod main body, the magnet rocking handles, the upper-layer blade and the lower-layer blade are symmetrically designed, so that when the shutter acts, the upper-layer blade and the lower-layer blade are driven by resultant force of the magnet rocking handles on the two sides, and the connecting rod main body plays a role in enabling the magnet rocking handles on the two sides to act synchronously; the magnet rocking handles directly drive the upper-layer blade and the lower-layer blade to act synchronously for the shutter, so that the problem of unequal speed when the blades on the two sides of a traditional double-magnetic-valve shutter structure act is solved, and the connecting rod main body comprehensively and averagely distributes power of magnets on the two sides to the magnet rocking handles on the two sides. Compared with a traditional shutter structure, the shutter is more stable.

Description

Technical Field

[0001] The present invention belongs to the technical field of camera light valves, and particularly relates to a shutter double-magnetic-valve connecting rod structure. Background Art

[0002] A shutter, also known as a light gate or a shutter. It is an important component used to control the exposure time on a camera. According to its position in the camera, it can be divided into four types: a front-of-lens shutter, a rear-of-lens shutter, an in-lens shutter, and a focal-plane shutter. The common ones are the in-lens shutter and the focal-plane shutter. The in-lens shutter is located between the front and rear lens groups of a positive lens and is made of multiple extremely thin metal sheets, in the shape of leaf petals.

[0003] In the open state of a traditional shutter, the reason why the blade maintains the open state is that there is a magnetic attraction between the magnet crank and the iron core. When the shutter is impacted, and the impact force + the gravity of the falling blade > the magnetic force received by the magnet crank, the blade will switch from the open state to the closed state. Therefore, the ability of the traditional shutter blade to maintain the open state mainly depends on the magnitude of the magnetic force received by the magnet crank. Under a relatively large impact, the shutter will close due to the impact, resulting in the camera being unable to be used normally. Summary of the Invention

[0004] The purpose of the present invention is to provide a shutter double-magnetic-valve connecting rod structure with a simple structure and reasonable design to solve the above problems.

[0005] The present invention achieves the above purpose through the following technical solutions:

[0006] A shutter double-magnetic-valve connecting rod structure includes a fixed seat with a magnetic valve base installed in its top inner cavity. A magnetic valve base is arranged inside the fixed seat. Two magnets are diagonally installed on the magnetic valve base. A magnet crank is rotatably connected to the bottom of the magnet. The handle of the magnet crank penetrates through the magnetic valve base and extends above the magnetic valve base. A connecting rod main body is rotatably connected to the upper surface of the magnetic valve base. The connecting rod main body is in an L-shaped structure. A connecting hole is opened in the middle section of the connecting rod main body. Transmission holes are opened at both ends of the connecting rod main body. A first connecting shaft is fixedly connected to the upper surface of the magnetic valve base below the connecting hole. The middle section of the connecting rod main body is rotatably connected to the magnetic valve base through the cooperation of the connecting hole and the first connecting shaft. Both ends of the connecting rod main body are respectively sleeved on the handles of the two magnet cranks through the two transmission holes. A partition is arranged above the connecting rod main body. A group of blades is arranged on both the upper and lower sides of the partition. One end of each group of blades is rotatably connected to the magnetic valve base through a connecting piece. The blades are divided into lower blades and upper blades. The lower blades and the upper blades are distributed symmetrically in a staggered manner. An irregular hole is also opened at the end of the blade close to the connecting piece. The blades are respectively sleeved on the handles of the two magnet cranks through the irregular holes.

[0007] As a further optimized solution of the present invention, a control component for controlling the magnetic pole direction of the magnet is provided on the bottom wall of the magnetic valve base. The control component includes two control coils mounted on the lower surface of the magnetic valve base, and the two control coils are connected by a wire. One of the control coils is electrically connected to an electrode connection patch.

[0008] As a further optimized solution of the present invention, a through hole is provided on one side of the fixed seat close to the electrode connection patch. One end of the electrode connection patch away from the control coil passes through the bottom wall of the fixed seat through the through hole and extends below the bottom of the fixed seat.

[0009] As a further optimized solution of the present invention, an arc-shaped hole is provided on the magnetic valve base around the magnet. The handle of the magnet rocker passes through the magnetic valve base through the arc-shaped hole and can rotate in the arc-shaped hole.

[0010] As a further optimized solution of the present invention, the connecting member is two second connecting shafts fixedly connected to the upper surface of the magnetic valve base. Assembly holes are provided at one ends of the upper blade and the lower blade close to the corresponding second connecting shafts. The upper blade and the lower blade are both sleeved on the second connecting shafts through the assembly holes and can rotate around the assembly holes.

[0011] As a further optimized solution of the present invention, an upper cover for sealing is further installed on the top of the fixed seat. A plurality of fixing plates bent downward by 90 degrees are provided on the periphery of the upper cover. The upper cover is fixedly installed on the magnetic valve base through the fixing plates.

[0012] As a further optimized solution of the present invention, rectangular light-transmitting holes are provided at the centers of the fixed seat, the magnetic valve base, the partition plate and the upper cover.

[0013] The beneficial effects of the present invention are as follows: Since a connecting rod body is provided between the two magnet rockers for linkage, and the connecting rod body, the magnet rockers, the upper blade and the lower blade are all symmetrically designed. When the shutter operates, the resultant force received by the two magnet rockers on both sides drives the upper blade and the lower blade. The connecting rod body plays a role in synchronizing the two magnet rockers on both sides. The magnet rockers directly drive the upper blade and the lower blade. The performance of the shutter is that the upper blade and the lower blade act synchronously, avoiding the problem of unequal speeds when the blades on both sides of the traditional double-magnetic-valve shutter structure act. The connecting rod body comprehensively and evenly distributes the magnetic power on both sides to the magnet rockers on both sides, which is more stable than the traditional shutter structure.

[0014] Figure 1 is the exploded view of the overall structure of the present invention;

[0015] Figure 2 is the schematic diagram of the installation structure of the lower blade, the partition plate and the upper blade of the present invention;

[0016] Figure 3 It is a schematic diagram of the connection structure between the connecting rod body and the magnet crank of the present invention;

[0017] Figure 4 It is a schematic diagram of the back structure of the magnet valve base of the present invention;

[0018] Figure 5 It is a schematic diagram of the front structure of the magnet valve base of the present invention;

[0019] Figure 6 It is a schematic diagram of the bottom structure of the fixing seat of the present invention.

[0020] In the figure: 1, fixing seat; 2, magnet valve base; 3, magnet; 4, control coil; 5, electrode connection patch; 6, magnet crank; 7, connecting rod body; 71, transmission hole; 72, connection hole; 8, first connecting shaft; 9, second connecting shaft; 10, lower blade; 11, partition; 12, upper blade; 13, assembly hole; 14, special-shaped hole; 15, upper cover; 16, through hole. Detailed implementation manners

[0021] The following further describes the present application in detail with reference to the drawings. It is necessary to point out here that the following specific implementation manners are only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0022] Embodiment

[0023] As Figure 1 - Figure 6 shown, a shutter double-magnet valve connecting rod structure includes a fixing seat 1 with a magnet valve base 2 installed in the inner cavity at the top. A magnet valve base 2 with a rectangular cross-section is arranged in the fixing seat 1. Two magnets 3 are installed diagonally on the magnet valve base 2. A control component for controlling the magnetic pole direction of the magnet 3 is arranged on the bottom wall of the magnet valve base 2. The control component includes two control coils 4 installed on the lower surface of the magnet valve base 2. The two control coils 4 are connected by a wire. One of the control coils 4 is electrically connected to an electrode connection patch 5. The electrode connection patch 5 is used to connect to an external power supply to supply power to the magnet 3, so that the magnet 3 generates a magnetic force, and the magnetic pole direction on both sides of the magnet 3 can be changed according to the power-on direction of the magnet 3;

[0024] A through hole 16 is opened on one side of the fixing seat 1 close to the electrode connection patch 5. One end of the electrode connection patch 5 away from the control coil 4 passes through the bottom wall of the fixing seat 1 through the through hole 16 and extends below the bottom of the fixing seat 1, facilitating the connection of the electrode connection patch 5 to an external power supply;

[0025] The bottom of the magnet 3 is rotatably connected to a magnet crank 6. An arc-shaped hole is provided on the magnet valve base 2 on the circumferential side of the magnet 3. The handle of the magnet crank 6 passes through the magnet valve base 2 through the arc-shaped hole and can rotate in the arc-shaped hole. When the magnetic poles of the magnet 3 change, the magnet crank 6 can be driven to rotate by the action of magnetic force, and the rotation direction of the magnet crank 6 can be changed according to the magnetic pole changes on both sides of the magnet 3;

[0026] The upper surface of the magnet valve base 2 is rotatably connected to a connecting rod main body 7. The connecting rod main body 7 is in an L-shaped structure. A connecting hole 72 is provided in the middle section of the connecting rod main body 7, and transmission holes 71 are provided at both ends of the connecting rod main body 7. A first connecting shaft 8 is fixedly connected to the upper surface of the magnet valve base 2 below the connecting hole 72. The middle section of the connecting rod main body 7 is sleeved on the first connecting shaft 8 through the connecting hole 72 and can rotate around the first connecting shaft 8. The two ends of the connecting rod main body 7 are respectively sleeved on the handles of the two magnet cranks 6 through the two transmission holes 71. When one of the magnet cranks 6 rotates, the other magnet crank 6 can be driven to rotate synchronously and reversely through the linkage action of the connecting rod main body 7, so as to realize the linkage between the two magnet cranks 6 through the connecting rod main body 7;

[0027] A partition 11 is arranged above the connecting rod main body 7. A group of blades with one end rotatably connected to the magnet valve base 2 through a connecting member are arranged on both the upper and lower sides of the partition 11. The blades are divided into lower blades 10 and upper blades 12. The lower blades 10 and the upper blades 12 are distributed symmetrically in a staggered manner. The connecting member is two second connecting shafts 9 fixedly connected to the upper surface of the magnet valve base 2. Assembly holes 13 are provided at one ends of the upper blades 12 and the lower blades 10 close to the corresponding second connecting shafts 9. The upper blades 12 and the lower blades 10 are both sleeved on the second connecting shafts 9 through the assembly holes 13, so that both the upper blades 12 and the lower blades 10 can rotate around the second connecting shafts 9;

[0028] Special-shaped holes 14 are also provided at one ends of the lower blades 10 and the upper blades 12 close to the connecting member. The upper blades 12 and the special-shaped holes 14 are respectively sleeved on the handles of the two magnet cranks 6 through the special-shaped holes 14. Since the shapes of the special-shaped holes 14 provided on the multiple upper blades 12 and the lower blades 10 in each group are different, when the handle of the magnet crank 6 rotates, it can drive the multiple upper blades 12 and the lower blades 10 in each group to rotate by different angles in cooperation with the special-shaped holes 14, so that the multiple upper blades 12 and the lower blades 10 in each group are unfolded or closed, and in cooperation with the linkage action of the connecting rod main body 7, the upper blades 12 and the lower blades 10 can be synchronously opened and closed;

[0029] A top cover 15 for sealing is also installed on the top of the fixed seat 1. A plurality of fixing plates bent downward by 90 degrees are arranged on the peripheral side of the top cover 15. The top cover 15 is fixedly installed with the solenoid valve base 2 through the fixing plates. The top opening of the solenoid valve fixed seat 1 is sealed by the top cover 15 to protect the structure inside the solenoid valve fixed seat 1. The setting of the fixing plates can increase the contact surface between the top cover 15 and the solenoid valve base 2 and improve the stability of the installation of the top cover 15.

[0030] Rectangular light-transmitting holes are formed in the centers of the fixed seat 1, the solenoid valve base 2, the partition plate 11 and the top cover 15. When the upper blades 12 and the lower blades 10 are unfolded, light can pass through the rectangular light-transmitting holes. When the upper blades 10 and the lower blades 12 are closed, the rectangular light-transmitting holes can be sealed to block light.

[0031] It should be noted that for this shutter double-solenoid valve connecting rod structure, during use, the overall shutter double-solenoid valve structure is installed on the imaging device. When the imaging device falls and causes a lateral impact force on the shutter solenoid valve structure, at this time, the upper blade 12 located above will receive a downward impact force F1. When F1 is greater than the resistance force generated by the magnet rocker 6 connected to the upper blade 12, the upper blade 12 will tend to unfold. At this time, the lower blade 10 located below receives an impact force F2 in the same direction as F1. Since the handles of the two magnet rockers 6 are connected by the connecting rod body 7, the impact force of the falling of the upper blade 12 can be converted into a rotational upward acting force F3 on the lower blade 10 through the linkage of the connecting rod body 7, and the acting force F3 that the connecting rod body 7 drives the lower blade 10 to rotate upward is the same as the downward impact force F1 received by the upper blade 12. According to the force analysis, it can be obtained that the impact force F2 received by the lower blade 10 minus the magnetic field force between the two magnet rockers 6 and the magnet 3 is equal to the upward acting force F3 that the lower blade 10 receives driven by the connecting rod body 7. Therefore, it can be deduced that F2 is greater than F3. Therefore, the lower blade 10 will not close when receiving an impact, and it can avoid the problem that the light-shielding blades of the traditional shutter structure are likely to close due to the impact when receiving a large lateral impact, resulting in the camera being unable to be used normally.

[0032] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A shutter double magnetic valve connecting rod structure, comprising a fixed seat (1) with a magnetic valve base (2) installed in the inner cavity at the top. The magnetic valve base (2) is arranged inside the fixed seat (1), and two magnets (3) are diagonally installed on the magnetic valve base (2). It is characterized in that: A magnet handle (6) is rotatably connected to the bottom of the magnet (3). The handle of the magnet handle (6) penetrates through the magnet valve base (2) and extends above the magnet valve base (2). A connecting rod body (7) is rotatably connected to the upper surface of the magnet valve base (2). The connecting rod body (7) has an L-shaped structure. A connecting hole (72) is provided in the middle section of the connecting rod body (7), and transmission holes (71) are provided at both ends of the connecting rod body (7). A first connecting shaft (8) is fixedly connected to the upper surface of the magnet valve base (2) below the connecting hole (72). The middle section of the connecting rod body (7) is rotatably connected to the magnet valve base (2) through the connecting hole (72) and the first connecting shaft (8). The two ends of the connecting rod body (7) are respectively sleeved on the handles of the two magnet handles (6) through the two transmission holes (71). A partition plate (11) is arranged above the connecting rod body (7). A group of blades are arranged on both the upper and lower sides of the partition plate (11), one end of each blade is rotatably connected to the magnet valve base (2) through a connecting member. The blades are divided into a lower layer of blades (10) and an upper layer of blades (12). The lower layer of blades (10) and the upper layer of blades (12) are distributed symmetrically and staggeredly. An irregular hole (14) is also provided at one end of the blade close to the connecting member. The blades are respectively sleeved on the handles of the two magnet handles (6) through the irregular holes (14).

2. The linkage structure of the shutter double magnetic valve according to claim 1, wherein: A control assembly for controlling the magnetic pole direction of the magnet (3) is arranged on the bottom wall of the magnet valve base (2). The control assembly includes two control coils (4) installed on the lower surface of the magnet valve base (2). The two control coils (4) are connected by a wire. One of the control coils (4) is electrically connected to an electrode connection patch (5).

3. The linkage structure of a shutter double magnetic valve according to claim 2, characterized in that: A through hole (16) is provided on one side of the fixed seat (1) close to the electrode connection patch (5). One end of the electrode connection patch (5) away from the control coil (4) penetrates through the bottom wall of the fixed seat (1) through the through hole (16) and extends below the bottom of the fixed seat (1).

4. A shutter double magnetic valve connecting rod structure according to claim 1, characterized in that: An arc-shaped hole is provided in the magnet valve base (2) on the periphery of the magnet (3). The handle of the magnet handle (6) penetrates through the magnet valve base (2) through the arc-shaped hole and can rotate in the arc-shaped hole.

5. A shutter double magnetic valve connecting rod structure according to claim 1, characterized in that: The connecting member is two second connecting shafts (9) fixedly connected to the upper surface of the magnet valve base (2). Assembly holes (13) are provided at one end of the upper layer of blades (12) and the lower layer of blades (10) close to the corresponding second connecting shafts (9). The upper layer of blades (12) and the lower layer of blades (10) are both sleeved on the second connecting shafts (9) through the assembly holes (13) and can rotate around the assembly holes (13).

6. A shutter double magnetic valve connecting rod structure according to claim 1, characterized in that: An upper cover (15) for sealing is further installed on the top of the fixed seat (1). A plurality of fixing plates bent downward at a right angle are arranged on the periphery of the upper cover (15). The upper cover (15) is fixedly installed with the magnet valve base (3) through the fixing plates.

7. A shutter double magnetic valve link structure according to claim 6, characterized in that: The fixing base (1), the solenoid valve base (2), the partition plate (11), and the upper cover (15) are all provided with rectangular light-transmitting holes at their centers.

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