A four-bar linkage mirror mechanism

Abstract

The application provides a four-bar linkage swing mirror mechanism, which can quickly adjust the scanning range and the imaging focal plane tilt angle position of a scanning mechanism, reduces the use cost and improves the use efficiency. The four-bar linkage swing mirror mechanism comprises a crank, a crank slider, a connecting rod, a connecting rod slider and a swing mirror. The output end of the crank is provided with the crank slider. The output position of the crank slider and the crank comprises a locking state and a sliding state. In the locking state, the output position of the crank slider and the crank is locked. In the sliding state, the crank slider is movably arranged along the free change direction of the crank. One end of the crank slider is pivotally connected to the connecting rod. The other end of the connecting rod is provided with the connecting rod slider. The position of the connecting rod slider and the connecting rod comprises a locking state and a sliding state. In the locking state, the position of the connecting rod slider and the connecting rod is locked. In the sliding state, the connecting rod slider is movably arranged along the axial direction of the connecting rod. One end of the swing mirror in the height direction is pivotally connected to the connecting rod slider. The other end of the swing mirror in the height direction is pivotally connected to a fixed seat body.

Description

Technical Field

[0001] This invention relates to the technical field of mirror structures, specifically a four-bar linkage mirror mechanism. Background Technology

[0002] In optical imaging systems, the swing angle range of the tilting mirror directly determines the optical imaging height range. Existing optical imaging systems use four-bar linkages with a fixed scanning range. When the scanning range needs to be changed, the linkages and corresponding parts in the scanning mechanism must be replaced, increasing operating costs and reducing efficiency. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a four-bar linkage mirror mechanism, which allows for rapid adjustment of the scanning range and the tilt angle of the imaging focal plane, thereby reducing operating costs and improving efficiency.

[0004] A four-bar linkage mirror mechanism, characterized in that it comprises:

[0005] crank;

[0006] Crank-slider;

[0007] link;

[0008] Linkage slider;

[0009] And the mirror;

[0010] The crank output end is provided with the crank slider. The crank slider and the crank output position include a locked state and a sliding state. In the locked state, the crank slider and the crank output end position are locked. In the sliding state, the crank slider is moved along the free change direction of the crank.

[0011] The crank slider is pivotally connected to one end of the connecting rod;

[0012] The other end of the connecting rod is fitted with the connecting rod slider. The positions of the connecting rod slider and the connecting rod include a locked state and a sliding state. In the locked state, the position of the connecting rod of the connecting rod slider is locked. In the sliding state, the connecting rod slider is moved along the axial direction of the connecting rod.

[0013] One end of the swing mirror in the height direction is pivotally connected to the connecting rod slider, and the other end of the swing mirror in the height direction is pivotally connected to the fixed base.

[0014] Its further feature is that: when the crank and crank slider are in a locked state, and the connecting rod slider and connecting rod are in a locked state, the crank rotates, causing the crank slider to rotate around, which in turn causes the other end of the connecting rod to swing, which in turn causes the connecting rod slider to swing, so that one end of the pendulum mirror swings in the height direction.

[0015] The lower end of the swing mirror in the height direction is pivotally connected to the connecting rod slider, and the upper end of the swing mirror in the height direction is pivotally connected to the upper fixed base;

[0016] Preferably, the direction of free transformation of the crank is specifically the direction of changing the effective length between the crank slider and the crank center point;

[0017] By sliding the crank slider, the effective length of the crank structure is changed, thereby altering the imaging height range of the pendulum mirror.

[0018] The sliding link slider changes the effective length of the linkage mechanism, thereby changing the tilt angle of the imaging focal plane of the tilting mirror.

[0019] When only the tilt angle of the imaging focal plane needs to be changed without changing the scanning height range, the effective length of the linkage mechanism can be changed simply by sliding the slider of the linkage.

[0020] The crank is specifically a turntable structure. A central shaft is fixed to the radial center of the turntable structure. An external rotational power is connected to the central shaft, which drives the turntable structure to rotate around the central shaft. The turntable structure is provided with a radially extending guide groove in the circumferential direction. The guide groove limits the free change direction of the crank slider. The crank slider is locked to a fixed radial position in the guide groove by an insertion mechanism. When the insertion mechanism is released, the crank slider moves radially along the guide groove.

[0021] It includes an upper fixed frame, one end of which is provided with a lower protruding bracket, the lower protruding bracket is provided with a central shaft, the central shaft is fixedly fitted with a turntable structure, the turntable structure is provided with a radially extending guide groove in the circumferential direction, one end of a connecting rod is fixedly provided with a first side protruding shaft, the first side protruding shaft is inserted into the guide groove and fixedly connected by a locking nut, the other end of the connecting rod is provided with an axial guide groove along the axial direction, the other end of the upper fixed frame is provided with a lower protruding mounting seat, the lower end of the lower protruding mounting seat is connected to the upper back area of ​​the swing mirror through a pivot shaft, the lower back area of ​​the swing mirror is fixedly connected to a connecting block, the side protruding shaft of the connecting block is inserted into the axial guide groove of the connecting rod and is fastened by a locking nut.

[0022] After adopting the structure of the present invention, see Figures 2-5 When the crank rotates, the swing range of the pendulum mirror is between 5.1 and 5.3, including the middle pendulum mirror 5.2 within the swing range. Light rays are refracted by 6, and the focal plane of the refracted image is within the range of 7.1. If the height range of the image is changed, i.e., the swing range of the pendulum mirror 5 is changed, the length of the crank 1 is altered by sliding the crank slider 2, thus obtaining... Figure 4The scanning range is wide, but the tilt angle of its imaging focal plane 7.2 is different from that of its imaging focal plane 7.1. Its imaging focal plane 7.2 is not vertical. By changing the effective length of the linkage mechanism by sliding the slider 4, the tilt angle of its imaging focal plane 7.3 is finally vertical. This achieves the goal of changing only the scanning range without changing the tilt angle of its imaging focal plane. When only the tilt angle of the imaging focal plane is changed without changing the scanning range, the length of the linkage can be changed simply by sliding the slider 4. This allows the scanning range and the tilt angle of the imaging focal plane of the scanning mechanism to be quickly adjusted, reducing the cost of use and improving the efficiency of use. Attached Figure Description

[0023] Figure 1 This is a simplified schematic diagram illustrating the principle and structure of the present invention;

[0024] Figure 2 for Figure 1 The corresponding working principle diagram;

[0025] Figure 3 for Figure 1 A schematic diagram of the imaging focal plane without changing the effective length of the crankshaft;

[0026] Figure 4 for Figure 1 A schematic diagram of the imaging focal plane with varying effective crankshaft length;

[0027] Figure 5 for Figure 1 A schematic diagram of the imaging focal plane without changing the effective length of the crankshaft and the effective length of the connecting rod;

[0028] Figure 6 A perspective view illustrating a specific embodiment of the present invention. Figure 1 ;

[0029] Figure 7 A perspective view illustrating a specific embodiment of the present invention. Figure 2 . Detailed Implementation

[0030] A four-bar linkage mirror mechanism, see Figures 1-7 It includes crank 1, crank slider 2, connecting rod 3, connecting rod slider 4, and pendulum mirror 5;

[0031] The output end of crank 1 is provided with crank slider 2. The output positions of crank slider 2 and crank 1 include a locked state and a sliding state. In the locked state, the output end positions of crank slider 2 and crank 1 are locked. In the sliding state, crank slider 2 moves along the free change direction of crank 1.

[0032] The crank-slider 2 is pivotally connected to one end of the connecting rod 3;

[0033] The other end of the connecting rod 3 is fitted with a connecting rod slider 4. The positions of the connecting rod slider 4 and the connecting rod 3 include a locked state and a sliding state. In the locked state, the position of the connecting rod 3 of the connecting rod slider 4 is locked. In the sliding state, the connecting rod slider 4 is moved along the axial direction of the connecting rod 3.

[0034] One end of the pendulum mirror 5 is pivotally connected to the connecting rod slider 4 in the height direction, and the other end of the pendulum mirror 5 is pivotally connected to the fixed base in the height direction.

[0035] For specific implementation details, see [link / reference] Figure 2 With crank 1 and crank slider 2 locked, and connecting rod slider 4 and connecting rod 3 locked, crank 1 rotates, causing crank slider 2 to rotate, which in turn causes the other end of connecting rod 3 to swing, which in turn causes connecting rod slider 4 to swing, causing one end of the pendulum mirror 5 to swing in the height direction.

[0036] The lower end of the pendulum mirror 5 is pivotally connected to the connecting rod slider 4 in the height direction, and the upper end of the pendulum mirror 5 is pivotally connected to the upper fixed base in the height direction.

[0037] In a preferred embodiment, the free transformation direction of crank 1 is specifically the direction of changing the effective length between crank slider 2 and the center point of crank 1;

[0038] By sliding the crank slider 2, the effective length of the crank structure is changed, thereby changing the imaging height range of the pendulum mirror 5.

[0039] Slide the slider 4 of the sliding link to change the effective length of the linkage mechanism, thereby changing the tilt angle of the imaging focal plane 7.1 of the swing mirror 5.

[0040] When only the tilt angle of the imaging focal plane 7.1 needs to be changed without changing the scanning height range, the effective length of the linkage mechanism can be changed simply by sliding the slider 4.

[0041] In a specific embodiment, see Figure 6 and Figure 7It includes an upper fixed frame 20, one end of which is provided with a lower protruding bracket 21. A central shaft 11 is provided on the lower protruding bracket 21. A turntable structure 10 is fixedly sleeved on the central shaft 11. A radially extending guide groove 12 is provided circumferentially on the turntable structure 10. One end of the connecting rod 3 is fixedly provided with a first side protruding shaft 31. The first side protruding shaft 31 is inserted into the guide groove 12 and fixedly connected by a locking nut. The first side protruding shaft 31 is the pivotally connected crank slider. The other end of the connecting rod 3 is provided with an axial guide groove 32 along the axial direction. The other end of the upper fixed frame 20 is provided with a lower protruding mounting seat 22. The lower end of the lower protruding mounting seat 22 is connected to the upper back area of ​​the swing mirror 5 through a pivot shaft 23. A connecting block 40 is fixedly connected to the lower back area of ​​the swing mirror 5. The side protruding shaft 41 of the connecting block 40 is inserted into the axial guide groove 32 of the connecting rod 3 and is fastened by a locking nut. The side protruding shaft 41 is the pivotally connected connecting rod slider.

[0042] Its working principle is as follows, see Figures 1-5 When the crank rotates, the swing range of the pendulum mirror 5 is between 5.1 and 5.3, including the middle pendulum mirror 5.2 within the swing range. The light ray 6 is refracted, and the focal plane of the refracted image is within the range of 7.1. If the height range of the image is changed, i.e., the swing range of the pendulum mirror 5 is changed, the length of the crank 1 can be altered by sliding the crank slider 2. Figure 4 The scanning range is wide, but the tilt angle of its imaging focal plane 7.2 is different from that of its imaging focal plane 7.1. Its imaging focal plane 7.2 is not vertical. By changing the effective length of the linkage mechanism by sliding the slider 4, the tilt angle of its imaging focal plane 7.3 is finally vertical. This achieves the goal of changing only the scanning range without changing the tilt angle of its imaging focal plane. When only the tilt angle of the imaging focal plane is changed without changing the scanning range, the length of the linkage can be changed simply by sliding the slider 4. This allows the scanning range and the tilt angle of the imaging focal plane of the scanning mechanism to be quickly adjusted, reducing the cost of use and improving the efficiency of use.

[0043] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0044] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A four-bar linkage mirror mechanism, characterized in that, It includes: crank; Crank-slider; link; Linkage slider; And the mirror; The crank output end is provided with the crank slider. The crank slider and the crank output position include a locked state and a sliding state. In the locked state, the crank slider and the crank output end position are locked. In the sliding state, the crank slider is moved along the free change direction of the crank. The crank slider is pivotally connected to one end of the connecting rod; The other end of the connecting rod is fitted with the connecting rod slider. The positions of the connecting rod slider and the connecting rod include a locked state and a sliding state. In the locked state, the position of the connecting rod of the connecting rod slider is locked. In the sliding state, the connecting rod slider is moved along the axial direction of the connecting rod. One end of the swing mirror in the height direction is pivotally connected to the connecting rod slider, and the other end of the swing mirror in the height direction is pivotally connected to the fixed base. When the crank and crank slider are locked, and the connecting rod slider and connecting rod are locked, the crank rotates, causing the crank slider to rotate, which in turn causes the other end of the connecting rod to swing, which in turn causes the connecting rod slider to swing, thus causing one end of the pendulum mirror to swing in the height direction. The lower end of the swing mirror in the height direction is pivotally connected to the connecting rod slider, and the upper end of the swing mirror in the height direction is pivotally connected to the upper fixed base.

2. The four-bar linkage mirror mechanism as described in claim 1, characterized in that: The free transformation direction of the crank is specifically the direction that changes the effective length between the crank slider and the crank center point.

3. The four-bar linkage mirror mechanism as described in claim 2, characterized in that: By sliding the crank slider, the effective length of the crank structure is changed, thereby altering the imaging height range of the pendulum mirror.

4. A four-bar linkage mirror mechanism as described in claim 2, characterized in that: The sliding link slider changes the effective length of the linkage mechanism, thereby changing the tilt angle of the imaging focal plane of the tilting mirror.

5. A four-bar linkage mirror mechanism as described in claim 1, characterized in that: When only the tilt angle of the imaging focal plane needs to be changed without altering the scanning height range, the effective length of the linkage mechanism can be altered simply by sliding the slider of the linkage.

6. A four-bar linkage mirror mechanism as described in claim 1, characterized in that: The crank is specifically a turntable structure. A central shaft is fixed to the radial center of the turntable structure. An external rotational power is connected to the central shaft, which drives the turntable structure to rotate around the central shaft. The turntable structure has a radially extending guide groove in its circumferential direction. The guide groove limits the free change direction of the crank slider. The crank slider is locked to a fixed radial position in the guide groove by an insertion mechanism. When the insertion mechanism is released, the crank slider moves radially along the guide groove.

7. A four-bar linkage mirror mechanism as described in claim 6, characterized in that: It includes an upper fixed frame, one end of which is provided with a lower protruding bracket, the lower protruding bracket is provided with a central shaft, the central shaft is fixedly fitted with a turntable structure, the turntable structure is provided with a radially extending guide groove in the circumferential direction, one end of a connecting rod is fixedly provided with a first side protruding shaft, the first side protruding shaft is inserted into the guide groove and fixedly connected by a locking nut, the other end of the connecting rod is provided with an axial guide groove along the axial direction, the other end of the upper fixed frame is provided with a lower protruding mounting seat, the lower end of the lower protruding mounting seat is connected to the upper back area of ​​the swing mirror through a pivot shaft, the lower back area of ​​the swing mirror is fixedly connected to a connecting block, the side protruding shaft of the connecting block is inserted into the axial guide groove of the connecting rod and is fastened by a locking nut.

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