Shutter mechanism and imaging equipment

Abstract

The utility model relates to a shutter mechanism and imaging equipment, and the shutter mechanism comprises a first shutter blade which is provided with a first guide structure; the second shutter blade is provided with a second guide structure; the connecting rod is provided with a first end part and a second end part; one end of the first connecting piece is connected with the first end part of the connecting rod, and the other end of the first connecting piece is matched with the first guide structure; one end of the second connecting piece is connected with the second end part of the connecting rod, and the other end of the second connecting piece is matched with the second guide structure; and the driving mechanism is connected with the connecting rod and is used for driving the connecting rod to rotate by taking a central axis penetrating through the center of the connecting rod as a shaft, and when the connecting rod rotates, the first connecting piece and the second connecting piece correspondingly drive the first shutter blade and the second shutter blade to simultaneously move towards each other or simultaneously move back to back. The shutter is simple in structure, the first shutter blade and the second shutter blade can be driven to rotate synchronously only through the same connecting rod, and the situation that the connecting rod drives the first shutter blade and the second shutter blade to be opened and closed at will can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of imaging equipment, in particular to a shutter mechanism and imaging equipment. Background Art

[0002] Most existing imaging devices (including infrared imaging devices and visible light imaging devices) are designed with a shutter, and the amount of light entering is adjusted by driving the shutter to open and close via a driving mechanism.

[0003] When an imaging device is subjected to external force due to a collision or other reasons, the shutter and the drive mechanism will automatically open or close under the influence of the force. For example, when the drive mechanism is subjected to an impact, it may generate a rotational torque, which in turn drives the shutter to open and close, resulting in a reduction in the shutter's service life and imaging quality. Utility Model Content

[0004] The purpose of the present utility model is to provide a shutter mechanism and an imaging device. The shutter mechanism has a simple structure and can drive the first shutter blade and the second shutter blade to rotate synchronously through the same connecting rod, and can prevent the connecting rod from driving the first shutter blade and the second shutter blade to open and close at will.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] In one aspect, a shutter mechanism is provided, comprising:

[0007] A first shutter blade is provided with a first guide structure;

[0008] a second shutter blade, which is provided with a second guide structure;

[0009] a connecting rod having a first end and a second end;

[0010] a first connecting member, one end of which is connected to the first end portion of the connecting rod and the other end of which is engaged with the first guide structure;

[0011] a second connecting member, one end of which is connected to the second end portion of the connecting rod and the other end of which is engaged with the second guide structure;

[0012] And a driving mechanism, which is connected to the connecting rod and is used to drive the connecting rod to rotate around the central axis passing through its center, and when the connecting rod rotates, the first connecting member and the second connecting member correspondingly drive the first shutter blade and the second shutter blade to move toward each other or move away from each other at the same time.

[0013] Preferably, the connecting rod is an axisymmetric structure, and its center of mass coincides with the center.

[0014] Preferably, the first guide structure is a slot or hole structure, and the second guide structure is a slot or hole structure.

[0015] Preferably, the first shutter blade and the second shutter blade have the same shape and weight.

[0016] Preferably, the driving mechanism includes:

[0017] a gear mounting member connected to the connecting rod;

[0018] a gear, which is sleeved on the outer circumferential surface of the gear mounting member and fixedly connected to the gear mounting member;

[0019] a rocker arm having an end portion having teeth for meshing with the gear;

[0020] And a rocker arm driving unit connected to the rocker arm, which is used to drive the rocker arm to rotate through the meshing transmission of teeth and gears.

[0021] Preferably, the rocker arm drive unit includes:

[0022] Iron core, magnet;

[0023] a coil connected to a power source and wound around the iron core;

[0024] and a rocker arm mounting member connecting the magnet and the rocker arm;

[0025] The rocker arm mounting piece, the rocker arm and the magnet rotate synchronously under the electromagnetic action.

[0026] Preferably, the radius of the end of the rocker arm having the teeth is greater than the radius of the gear.

[0027] Preferably, the shutter mechanism further comprises:

[0028] The shutter blade movement guide mechanism is used to cooperate with the first shutter blade and / or the second shutter blade to guide the first shutter blade and / or the second shutter blade to move along a predetermined direction.

[0029] Preferably, the shutter blade movement guide mechanism includes:

[0030] a first guide groove, which is formed on the first shutter blade and extends along a moving direction of the first shutter blade;

[0031] and a first guide block, which is used to cooperate with the first guide groove, and when the first shutter blade moves, the first guide block moves relatively in the first guide groove and along the extending direction of the first guide groove;

[0032] And / or, the shutter blade movement guide mechanism includes:

[0033] a second guide groove, which is formed on the second shutter blade and extends along a moving direction of the second shutter blade;

[0034] and a second guide block, which is used to cooperate with the second guide groove, and when the second shutter blade moves, the second guide block moves relatively in the second guide groove and along the extending direction of the second guide groove.

[0035] On the other hand, an imaging device is also provided, which includes the shutter mechanism mentioned above.

[0036] In summary, the present invention has the following beneficial effects compared with the prior art:

[0037] The utility model only needs to use the same connecting rod to drive the first shutter blade and the second shutter blade to rotate synchronously to realize the opening and closing of the shutter. At the same time, the electromagnetic drive unit, the gear meshing structure and the connecting rod with an axially symmetrical structure reduce the influence of external impact on the rocker arm and the gear, so as to avoid the connecting rod driving the first shutter blade and the second shutter blade to open and close at will. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a front view of the shutter mechanism of the utility model when the light hole is open;

[0039] Figure 2 It is a top view of the first shutter blade, the second shutter blade, and the gear mounting member of the present invention;

[0040] Figure 3 This is a front view of the shutter mechanism of the utility model when the light hole is closed;

[0041] Figure 4 This is a schematic diagram of the impulses received by both ends of the connecting rod when the shutter mechanism of the present invention is subjected to external impact. DETAILED DESCRIPTION

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0043] Example 1

[0044] like Figure 1-3 As shown, this embodiment provides a shutter mechanism, which includes:

[0045] The first shutter blade 1 is provided with a first guide structure 101;

[0046] The second shutter blade 2 is provided with a second guide structure 201;

[0047] The connecting rod 3 is an axisymmetric structure and has a first end 31 and a second end 32. The center of mass of the connecting rod 3 coincides with the center, so that the weight of the connecting rod 3 on both sides of the center is the same.

[0048] a first connecting member 4, one end of which is connected to the first end portion 31 of the connecting rod 3, and the other end of which cooperates with the first guide structure 101, wherein the cooperation includes the other end of the first connecting member 4 extending into the first guide structure 101, or passing through the first guide structure 101;

[0049] a second connecting member 5, one end of which is connected to the second end portion 32 of the connecting rod 3, and the other end of which is engaged with the second guide structure 201. Similarly, the engagement includes the other end of the second connecting member 5 extending into the second guide structure 201, or passing through the second guide structure 201;

[0050] and a driving mechanism connected to the connecting rod 3, configured to drive the connecting rod 3 to rotate about a central axis Y passing through the center thereof, wherein when the connecting rod 3 rotates, the first connecting member 4 and the second connecting member 5 can slide freely along the extension directions of the first guide structure 101 and the second guide structure 201, respectively, and at the same time, the central axis Y is perpendicular to the rotation plane of the connecting rod 3;

[0051] When the connecting rod 3 rotates in a first direction (e.g., clockwise), the first shutter blade 1 and the second shutter blade 2 are driven to move toward each other simultaneously (i.e., along the first direction) through the first connecting member 4 and the second connecting member 5. Figure 1 In the direction indicated by the solid arrow in the middle), to close the light-transmitting hole 100 (as shown in FIG. Figure 3 shown);

[0052] When the connecting rod 3 rotates in the second direction (such as counterclockwise), the first shutter blade 1 and the second shutter blade 2 are driven to move in opposite directions (i.e., in the opposite direction) through the first connecting member 4 and the second connecting member 5. Figure 3 In the direction indicated by the dotted arrow in the middle), to open the light-transmitting hole 100 (as shown in FIG. Figure 1 shown).

[0053] Furthermore, in this embodiment, the first shutter blade 1 and the second shutter blade 2 are arranged in parallel and have the same shape and weight, and the connecting rod 3 is located in the area between the first shutter blade 1 and the second shutter blade 2, and one or both of the first connecting member 4 and the second connecting member 5 are shaft-like workpieces, and one or both of the first connecting member 4 and the second connecting member 5 can be integrally formed with the connecting rod 3;

[0054] The free end of the first connecting member 4 (i.e., extending into the first guide structure 101, or, passing through one end of the first guide structure 101) and the free end of the second connecting member 5 (i.e., extending into the second guide structure 201, or, passing through the second guide structure 201) have opposite extension directions, and the first guide structure 101 can be a slot or hole structure, and similarly, the second guide structure 201 can also be a slot or hole structure. At the same time, the first guide structure 101 and the second guide structure 201 are both waist-shaped structures.

[0055] Therefore, the shutter mechanism in this embodiment has a simple structure. The first shutter blade and the second shutter blade can be driven to rotate synchronously by the same connecting rod to realize the opening and closing of the shutter. At the same time, the first shutter blade and the second shutter blade have the same shape and weight, and the connecting rod is an axisymmetric structure and rotates about the central axis Y passing through the center. Therefore, if Figure 4 As shown, when the shutter mechanism is subjected to external impact in the same direction, the first end and the second end of the connecting rod synchronously generate impulses F1 and F2 of the same direction and magnitude. The combined rotational torque generated by the two impulses F1 and F2 on the connecting rod is zero, making the connecting rod unable to rotate, further preventing the first shutter blade and the second shutter blade from opening and closing at will under the impact of external force.

[0056] Example 2:

[0057] The only difference between this embodiment and embodiment 1 is that the driving mechanism includes:

[0058] a gear mounting member 6 connected to the connecting rod 3 , wherein a central axis Y′ of the gear mounting member 6 coincides with a central axis Y passing through the center of the connecting rod 3 ;

[0059] a gear 7, which is sleeved on the outer circumferential surface of the gear mounting member 6 and fixedly connected to the gear mounting member 6 by bonding, welding, etc.;

[0060] a rocker arm 8 having teeth 81 at its end for meshing with the gear 7;

[0061] And a rocker arm driving unit connected to the rocker arm 8, which is used to drive the rocker arm 8 to rotate, so as to drive the gear mounting part 6, the gear 7, and the connecting rod 3 to rotate synchronously through the meshing transmission of the teeth 81 and the gear 7.

[0062] Furthermore, the rocker arm drive unit is an electromagnetic drive unit, which specifically includes:

[0063] Iron core 9, magnet 11;

[0064] a coil 10 connected to a power source and wound around the iron core 9;

[0065] A rocker arm mounting member 12 is fixedly connected to the magnet 11 by bonding, welding, or the like. At the same time, the rocker arm mounting member 12 is connected to the rocker arm 8, and the rocker arm mounting member 12, the rocker arm 8, and the magnet 11 rotate synchronously under electromagnetic action;

[0066] In this embodiment, one or both of the gear mounting member 6 and the rocker arm mounting member 12 are structures of standard geometric shapes, for example, both are shaft-type workpieces, and the rocker arm mounting member 12 and the magnet 11 are coaxially arranged. At the same time, the center of mass of the rocker arm 8 is located on the rocker arm mounting member 12.

[0067] During use, power is supplied to the coil 10 through a power supply to generate a magnetic field and magnetize the iron core 9. A magnetic force is generated between the magnetized iron core 9 and the magnet 11 to drive the rocker arm mounting part 12, the rocker arm 8, and the magnet 11 to rotate synchronously, while the iron core 9 remains stationary. By changing the positive and negative poles of the power supply connected to the coil 10, the direction of the magnetic force can be changed, so that the magnet 11 drives the rocker arm mounting part 12, the rocker arm 8, and the magnet 11 to rotate synchronously in the opposite direction under the action of the magnetic force.

[0068] Therefore, in this embodiment, a magnetic field is generated by the magnetized iron core 9 to apply a larger electromagnetic force to the magnet 11, so as to reduce the interference of external impact on the magnet 11, so that the magnet 11 can maintain its position unchanged or the position change amplitude is extremely small under external impact, further avoiding the rocker arm 8 from producing obvious rotation movement, so as to reduce the possibility of the shutter opening and closing at will. Furthermore, the center of mass of the rocker arm 8 is located on the rocker arm mounting part, so that the rotational torque generated by external impact on the rocker arm 8 is almost zero, which also helps to avoid the rocker arm 8 from rotating at will, and further avoids the connecting rod 3 from rotating through the rocker arm 8.

[0069] Furthermore, the radius R1 of the end of the rocker arm 8 with the tooth 81 is greater than the radius R2 of the gear 7. For example, in this embodiment, the value range of R1 is [1.01*R2, 1.1*R2]. Therefore, when the connecting rod 3 is subjected to external impact, the force acting on the gear 7 is transmitted to the tooth 81. Since the radius R1 of the end with the tooth 81 is greater than the radius R2 of the gear 7, the force on the tooth 81 is very small, and the gear 7 and the tooth 81 cannot engage and rotate. Therefore, the interference of the external impact on the connecting rod 3 can be further weakened, and the connecting rod 3 can be prevented from rotating significantly.

[0070] Example 3:

[0071] The only difference between this embodiment and embodiment 1 or 2 is that the shutter mechanism further includes:

[0072] The shutter blade movement guide mechanism is used to cooperate with the first shutter blade 1 and / or the second shutter blade 2 to guide the first shutter blade 1 and / or the second shutter blade 2 to move stably along a predetermined direction.

[0073] Specifically, the shutter blade movement guide mechanism includes:

[0074] a first guide groove 102 formed on the first shutter blade 1 and extending along a moving direction of the first shutter blade 1;

[0075] and a first guide block 103, which is configured to cooperate with the first guide slot 102, and when the first shutter blade 1 moves, the first guide block 103 moves relatively within the first guide slot 102 and along the extending direction of the first guide slot 102; wherein the cooperation includes the free end of the first guide block 103 extending into the first guide slot 102 or passing through the first guide slot 102;

[0076] Furthermore, the first guide block 103 can be connected to other components, such as a housing of an imaging device.

[0077] And / or, the shutter blade movement guide mechanism includes:

[0078] a second guide groove 202, which is formed on the second shutter blade 2 and extends along the moving direction of the second shutter blade 2;

[0079] And a second guide block 203, which is used to cooperate with the second guide groove 202, and when the second shutter blade 2 moves, the second guide block 203 moves relatively in the second guide groove 202 and along the extension direction of the second guide groove 202; similarly, the cooperation includes the free end of the second guide block 203 extending into the second guide groove 202, or passing through the second guide groove 202; and the second guide block 203 can also be connected to other components, such as the housing of the imaging device.

[0080] Therefore, through the cooperation of the guide block and the guide groove, the shutter blade can stably move along the predetermined direction to completely cover / open the light hole 100, thereby ensuring the imaging quality.

[0081] Example 4:

[0082] This embodiment provides an imaging device, which includes the shutter mechanism described in embodiment 1 or 2, and the imaging device is preferably an infrared imaging device.

[0083] To sum up, the shutter mechanism in the present application has a simple structure, and only the same connecting rod is needed to drive the first shutter blade and the second shutter blade to rotate synchronously to realize the opening and closing of the shutter. At the same time, the electromagnetic drive unit, the gear meshing structure and the connecting rod with an axially symmetrical structure are used to reduce the impact of external shocks on the rocker arm and the gear, so that the connecting rod cannot rotate or the rotation range is extremely small, so as to avoid the connecting rod driving the first shutter blade and the second shutter blade to open and close at will.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A shutter mechanism, characterized in that: include: A first shutter blade is provided with a first guide structure; a second shutter blade, which is provided with a second guide structure; a connecting rod having a first end and a second end; a first connecting member, one end of which is connected to the first end portion of the connecting rod and the other end of which is engaged with the first guide structure; a second connecting member, one end of which is connected to the second end portion of the connecting rod and the other end of which is engaged with the second guide structure; And a driving mechanism, which is connected to the connecting rod and is used to drive the connecting rod to rotate around the central axis passing through its center, and when the connecting rod rotates, the first connecting member and the second connecting member correspondingly drive the first shutter blade and the second shutter blade to move toward each other or move away from each other at the same time.

2. The shutter mechanism according to claim 1, wherein: The connecting rod is an axisymmetric structure, and its center of mass coincides with the center.

3. The shutter mechanism according to claim 1, wherein: The first guide structure is a slot or hole structure, and the second guide structure is a slot or hole structure.

4. The shutter mechanism according to claim 1, wherein: The first shutter blade and the second shutter blade have the same shape and weight.

5. The shutter mechanism according to claim 1, wherein: The driving mechanism comprises: a gear mounting member connected to the connecting rod; a gear, which is sleeved on the outer circumferential surface of the gear mounting member and fixedly connected to the gear mounting member; a rocker arm having an end portion having teeth for meshing with the gear; And a rocker arm driving unit connected to the rocker arm, which is used to drive the rocker arm to rotate through the meshing transmission of teeth and gears.

6. The shutter mechanism according to claim 5, wherein: The rocker arm drive unit comprises: Iron core, magnet; a coil connected to a power source and wound around the iron core; and a rocker arm mounting member connecting the magnet and the rocker arm; The rocker arm mounting piece, the rocker arm and the magnet rotate synchronously under the electromagnetic action.

7. The shutter mechanism according to claim 5, wherein: The radius of the end of the rocker arm that has the teeth is greater than the radius of the gear wheel.

8. The shutter mechanism according to claim 1, wherein: The shutter mechanism further comprises: The shutter blade movement guide mechanism is used to cooperate with the first shutter blade and / or the second shutter blade to guide the first shutter blade and / or the second shutter blade to move along a predetermined direction.

9. The shutter mechanism according to claim 8, wherein: The shutter blade movement guide mechanism includes: a first guide groove, which is formed on the first shutter blade and extends along a moving direction of the first shutter blade; and a first guide block, which is used to cooperate with the first guide groove, and when the first shutter blade moves, the first guide block moves relatively in the first guide groove and along the extending direction of the first guide groove; And / or, the shutter blade movement guide mechanism includes: a second guide groove, which is formed on the second shutter blade and extends along a moving direction of the second shutter blade; and a second guide block, which is used to cooperate with the second guide groove, and when the second shutter blade moves, the second guide block moves relatively in the second guide groove and along the extending direction of the second guide groove.

10. An imaging device, characterized in that: The shutter mechanism comprises the shutter mechanism described in any one of claims 1 to 9.

Images